PD043262IN-NP
FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10, rule 13)
1. Title of the invention: PLANT MAINTENANCE SUPPORT APPARATUS
2. Applicant(s)
NAME
NATIONALITY
ADDRESS
MITSUBISHI POWER, LTD.
Japanese
3-1, Minatomirai 3-Chome, Nishi-ku, Yokohama-shi, Kanagawa 2208401, Japan
3. Preamble to the description
COMPLETE SPECIFICATION
The following specification particularly describes the invention and the manner in which it is to be performed.
1
PLANT MAINTENANCE SUPPORT APPARATUS
TECHNICAL FIELD
[0001] The present disclosure relates to a plant maintenance support apparatus.
5
BACKGROUND
[0002] For example, in plants such as water treatment facilities, chemical product
manufacturing plants, and boilers, periodic inspections are conducted, and necessary measures
such as detailed inspection, repair, and replacement are taken according to inspection results.
For example, the plant life 10 diagnosis support apparatus described in Patent Document 1
evaluates the life of the inspection portion by inputting an inspection result obtained by the
inspection. Then, based on an evaluation result, the necessity of measures such as repair and
replacement is determined (see Patent Document 1).
15 Citation List
Patent Literature
[0003] Patent Document 1: JPH3-160201A
SUMMARY
20 Problems to be Solved
[0004] In the plant life diagnosis support apparatus described in Patent Document 1, when
the confidence level of the evaluation result is low due to reasons such as insufficient
information or abnormal data input, additional inspection details, such as inspection items and
methods to obtain a high confidence evaluation result, are presented.
25 Even when the confidence level of the evaluation result is high, it may be better to perform
additional inspection depending on the evaluation result of the life, but Patent Document 1 does
not mention this point.
As described above, the plant life diagnosis support apparatus described in Patent
2
Document 1 evaluates the life of the inspection portion based on the inspection result, and it is easy to determine the necessity of replacement or repair based on the life evaluation result. However, it is difficult to determine whether additional inspection should be performed within the limited man-hours available, for example.
[0005] In view of the above, an object of at least one embodiment of the present invention 5 is to support in determining the necessity of additional inspection during the inspection of a plant.
Solution to the Problems
[0006] (1) A plant maintenance support apparatus according to at least one embodiment of 10 the present invention comprises: a damage probability calculation unit configured to, for each of a plurality of inspection portions of a plant, calculate a damage probability indicating a probability that damage to each of the inspection portions reaches an allowable limit, using an inspection result including a plurality of measurement values indicating the damage of each of the inspection portions; and a first display command generation unit configured to generate a 15 first display command for displaying on a display device the plurality of inspection portions in a format that allows a magnitude relationship between the respective damage probabilities to be grasped.
[0007] With the above configuration (1), since the damage probability indicating the probability that damage to the inspection portion reaches the allowable limit is calculated, an 20 appropriate index is obtained to describe the condition of the inspection portion at the time the inspection is performed. Further, with the above configuration (1), since the magnitude relationship between the damage probabilities can be grasped, the priority and necessity of actions such as replacement, repair, and additional inspection are clarified. For example, if the operator determines that the damage probability displayed on the display device is clearly 25 high, he can determine that repair, replacement, or other action is necessary. Conversely, for example, if the operator determines that the damage probability displayed on the display device is clearly low, he can determine no measure is necessary. For example, if the operator 3
determines that the damage probability displayed on the display device is not clearly high or low, he can determine that additional inspection is necessary.
[0008] (2) In some embodiments, in the above configuration (1), the damage probability calculation unit calculates, as the damage probability, a proportion of a portion that reaches a threshold of the measurement values corresponding to the allowable limit in a distribution of 5 the measurement values as a population estimated by statistical processing of the plurality of measurement values of each of the inspection portions.
[0009] With the above configuration (2), an appropriate index is obtained to describe the condition of the inspection portion at the time the inspection is performed.
[0010] (3) In some embodiments, in the above configuration (1) or (2), the plant 10 maintenance support apparatus further comprises a determination unit configure to whether the plurality of measurement values associated with each of the inspection portions includes abnormal data. The first display command generation unit is configured to generate, as the first display command, a display command for displaying on a display device the plurality of inspection portions in a format that allows a magnitude relationship between the respective 15 damage probabilities to be grasped, and for displaying on the display device the plurality of inspection portions so that an inspection portion where the inspection result including the abnormal data has been obtained can be identified.
[0011] For example, when the inspection portions are arranged in order of high damage probability and displayed on the display device, an inspection portion with low damage 20 probability is less conspicuous on the screen of the display device than an inspection portion with high damage probability. If abnormal data is included in the measurement values of the inconspicuous inspection portion, it is easy to overlook the fact that the abnormal data is included. In this regard, with the above configuration (3), since the inspection portion where the 25 inspection result including the abnormal data has been obtained can be identified on the screen of the display device, the operator can easily grasp that the abnormal data is included in the measurement values.
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[0012] (4) In some embodiments, in the above configuration (3), the abnormal data is at least one of a measurement value indicating that damage to the inspection portion reaches the allowable limit or a measurement value that cannot be taken at the inspection portion.
[0013] With the above configuration (4), it is possible to grasp whether the measurement values include at least one of a measurement value indicating that damage to the inspection 5 portion reaches the allowable limit or a measurement value that cannot be taken at the inspection portion.
[0014] (5) In some embodiments, in the above configuration (3) or (4), the determination unit at least determines whether each measurement value is a value that cannot be taken at the inspection portion, and the damage probability calculation unit calculates the damage 10 probability without using, among the abnormal data, the measurement value that is determined by the determination unit to be a value that cannot be taken at the inspection portion in calculation of the damage probability.
[0015] With the above configuration (5), it is possible to improve the reliability of the calculated damage probability. 15
[0016] (6) In some embodiments, in any one of the above configurations (1) to (5), the plant maintenance support apparatus further comprises: a second display command generation unit configured to generate a second display command for displaying on the display device a recommended inspection range of the plant, based on specification information of the plant; and an inspection result receiving unit configured to receive input of the inspection result 20 regarding the inspection portion included in the recommended inspection range.
[0017] With the above configuration (6), the recommended inspection range of the plant can be presented. Further, with the above configuration (6), the inspection result regarding the inspection portion included in the recommended inspection range can be input.
[0018] (7) In some embodiments, in the above configuration (6), the second display 25 command generation unit is configured to generate the second display command so as to display the recommended inspection range of the plant on the display device in order of high to low damage tendency.
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[0019] With the above configuration (7), since the recommended inspection range of the plant can be presented in order of high to low damage tendency, the operator can grasp an inspection range that should be prioritized among recommended inspection ranges.
[0020] In some embodiments, in the above configuration (6) or (7), the plant maintenance support apparatus comprises: a damage degree calculation unit configured to calculate a damage 5 degree of the inspection portion included in the recommended inspection range based on at least one of a previous inspection result associated with the inspection portion included in the recommended inspection range or a previous inspection result acquired on another plant including a portion corresponding to the inspection portion included in the recommended inspection range; and a third display command generation unit configured to generate a third 10 display command for displaying on the display device the damage degree of the inspection portion included in the recommended inspection range.
[0021] With the above configuration (8), since the damage degree of the inspection portion can be presented prior to the present inspection based on the previous inspection result of the same plant or another plant, the operator can grasp an inspection portion that should be 15 prioritized among inspection portions included in the recommended inspection range. Thus, it is possible to efficiently perform the inspection.
[0022] (9) In some embodiments, in the above configuration (8), the third display command generation unit generates the third display command so as to include a display command for displaying on the display device the damage degree of the inspection portion in a format that 20 allows a position of the inspection portion to be grasped.
[0023] With the above configuration (9), the operator can easily grasp the position of a portion that should be inspected with priority among inspection portions included in the recommended inspection range.
[0024] (10) In some embodiments, in the above configuration (8) or (9), the third display 25 command generation unit generates the third display command so as to include a display command for displaying on the display device a position and a name of the inspection portion.
[0025] With the above configuration (10), the operator can easily grasp the position and the 6
name of the inspection portion.
Advantageous Effects
[0026] According to at least one embodiment of the present invention, it is possible to support in determining the necessity of additional inspection during the inspection of a plant. 5
BRIEF DESCRIPTION OF DRAWINGS
[0027] FIG. 1 is an overall configuration diagram of a plant maintenance support apparatus according to some embodiments. FIG. 2 is a flowchart of plant maintenance support processing performed in the plant 10 maintenance support apparatus according to some embodiments. FIG. 3 is an example of a screen displayed on the display device. FIG. 4 is an example of a screen displayed on the display device. FIG. 5 is an example of a screen displayed on the display device. FIG. 6 is an example of a screen displayed on the display device. 15 FIG. 7 is an example of a screen displayed on the display device. FIG. 8 is an example of a screen displayed on the display device. FIG. 9 is an example of a screen displayed on the display device. FIG. 10 is an example of a screen displayed on the display device. FIG. 11 is an example of a screen displayed on the display device. 20 FIG. 12 is an example of a screen displayed on the display device. FIG. 13 is an example of a screen displayed on the display device. FIG. 14 is an example of a screen displayed on the display device. FIG. 15 is a schematic configuration diagram of a sewage treatment facility and sewage pipes. 25
DETAILED DESCRIPTION
[0028] Embodiments of the present invention will now be described in detail with reference 7
to the accompanying drawings. It is intended, however, that unless particularly identified, dimensions, materials, shapes, relative positions, and the like of components described in the embodiments shall be interpreted as illustrative only and not intended to limit the scope of the present invention. For instance, an expression of relative or absolute arrangement such as “in a direction”, 5 “along a direction”, “parallel”, “orthogonal”, “centered”, “concentric” and “coaxial” shall not be construed as indicating only the arrangement in a strict literal sense, but also includes a state where the arrangement is relatively displaced by a tolerance, or by an angle or a distance whereby it is possible to achieve the same function. For instance, an expression of an equal state such as “same” “equal” and “uniform” shall 10 not be construed as indicating only the state in which the feature is strictly equal, but also includes a state in which there is a tolerance or a difference that can still achieve the same function. Further, for instance, an expression of a shape such as a rectangular shape or a cylindrical shape shall not be construed as only the geometrically strict shape, but also includes a shape 15 with unevenness or chamfered corners within the range in which the same effect can be achieved. On the other hand, an expression such as “comprise”, “include”, “have”, “contain” and “constitute” are not intended to be exclusive of other components.
[0029] FIG. 1 is an overall configuration diagram of a plant maintenance support apparatus 20 according to some embodiments. A plant maintenance support apparatus 1 according to some embodiments includes a computing device 100. The computing device 100 is equipped with a processor (not shown) and a peripheral circuit such as a memory (not shown). The computing device 100 virtually has functional blocks of an input receiving unit 110, a recommended inspection range extraction unit 102, a damage degree calculation unit 103, a 25 damage probability calculation unit 105, a determination unit 107, and a display command generation unit 120. The plant maintenance support apparatus 1 according to some embodiments is connected with an input device 130, a database 150, and a display device 170.
8
In the following, the case where the plant subject to support by the plant maintenance support apparatus 1 according to some embodiments is, for example, a sewage treatment facility and a sewage pipe connecting the source of sewage to the sewage treatment facility will be described.
[0030] FIG. 15 is a schematic configuration diagram of a sewage treatment facility and 5 sewage pipes in a municipality. For convenience of explanation, the following description assumes that a sewage treatment facility (sewage treatment plant) 10 is provided in each municipality. For convenience of explanation, the following description assumes that the sewage treatment facility 10 in each municipality treats sewage generated from factories, homes, public facilities, etc., that exist within the municipality. The actual number of sewage pipes 10 gradually decreases as they are aggregated from multiple sewage generation places to the sewage treatment plant 10, but for convenience of explanation, the number is simplified in FIG. 15.
[0031] Examples of the sewage generation places include factories 21, homes 22, and public facilities 23. The system of sewage pipes 30 for leading sewage generated in the 15 factories 21 to the sewage treatment plant 10 is referred to as, for example, a factory line 31. The system of sewage pipes 30 for leading sewage generated in the homes 22 to the sewage treatment plant 10 is referred to as, for example, a home line 32. The system of sewage pipes 30 for leading sewage generated in the public facilities 23 to the sewage treatment plant 10 is referred to as, for example, a public facility line 33. 20
[0032] Each of the lines 31 to 33 according to some embodiments is divided into multiple sections for management purposes in maintenance, etc. The sections of each line 31 to 33 are represented as section A, section B, section C, section D, ..., in order from upstream to downstream, for example. In some embodiments, adjacent sections are separated from each other, for example, where a buried sewage pipe 30 intersects a road (street), where sewage pipes 25 30 are connected, or where they cross an administrative boundary such as Aza, Oaza, Cho, and Choume in Japan.
[0033] Each section according to some embodiments is further divided into multiple points
9
for management purposes (see FIG. 9 described later). The points are represented as point 1, point 2, point 3, point 4, ..., in order from upstream to downstream, for example. In some embodiments, adjacent points are separated from each other by, for example, a joint portion between the sewage pipes 30. In the case of the sewage pipe 30 with a long length between both joints, it may be divided into multiple points every few tens of centimeters to several 5 meters, for example.
[0034] Before explaining the configuration of each unit of the plant maintenance support apparatus 1 according to some embodiments, an overview of the functions realized by the plant maintenance support apparatus 1 according to some embodiments will be described. The plant maintenance support apparatus 1 according to some embodiments is designed to support 10 efficient inspection work in periodic inspections of the sewage pipes 30, for example.
[0035] As described later in detail, the plant maintenance support apparatus 1 according to some embodiments can calculate a damage probability indicating a probability that damage to each of the inspection portions of the sewage pipe 30 reaches an allowable limit, based on an inspection result obtained by inspection performed for each of the inspection portions. As 15 described later in detail, the plant maintenance support apparatus 1 according to some embodiments can generate a first display command for displaying on the display device 170 the inspection portions in a format that allows a magnitude relationship between the respective damage probabilities to be grasped.
[0036] Further, as described later in detail, the plant maintenance support apparatus 1 20 according to some embodiments can generate a second display command for displaying on the display device 170 a recommended inspection range of the plant, prior to inspecting the inspection portions. Further, as described later in detail, the plant maintenance support apparatus 1 according to some embodiments can generate a third display command for displaying on the display 25 device 170 the damage degree of the inspection portion included in the recommended inspection range, based on a previous inspection result, prior to inspecting the inspection portions.
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[0037] (Input receiving unit 110) The input receiving unit 110 of the plant maintenance support apparatus 1 according to some embodiments is configured to receive an input content input from the input device 130. The input content received by the input receiving unit 110 is, for example, information on the specification of the sewage treatment facility 10 and an inspection result including measurement 5 values obtained by inspection. The inspection result is received by an inspection result receiving unit 111 of the input receiving unit 110. Thus, the inspection result regarding the inspection portion included in the recommended inspection range can be input. The input receiving unit 110 stores the received input content in the database 150.
[0038] The input device 130 of the plant maintenance support apparatus 1 according to 10 some embodiments may be an input device such as a keyboard and a mouse, or a reading device that can read information from a memory card or the like in which the inspection result is stored. Alternatively, the input device 130 may be an interface for receiving data transmitted by wired or wireless means. The input device 130 may be installed at the same location as the plant maintenance 15 support apparatus 1 and directly connected to the plant maintenance support apparatus 1 by wired or wireless means, or it may be remote from the plant maintenance support apparatus 1 and connected via, for example, a public communication line network. In the case where the plant maintenance support apparatus 1 and the input device 130 are connected via a public communication line network, for example, the input device 130 may include, in addition to an 20 input device such as a keyboard and a mouse, a communication device connected to the input device for transmitting information input from the input device to the public communication network.
[0039] (Recommended inspection range extraction unit 102) As described below, the recommended inspection range extraction unit 102 of the plant 25 maintenance support apparatus 1 according to some embodiments extracts, for the sewage treatment facility 10 and the sewage pipes 30 of a municipality input and specified by the input receiving unit 110 (hereinafter referred to as the self facility), a recommended inspection range 11
that is recommended to be inspected this time, based on the inspection history (inspection result), repair history, and replacement history of the self facility stored in the database 150, or the inspection history, repair history, replacement history, and accident history of the sewage treatment facilities 10 and the sewage pipes 30 of multiple other municipalities different from the self facility (hereinafter referred to as other facilities). 5 The information on the recommended inspection range thus calculated can be presented to the operator prior to the present inspection, as described later.
[0040] The database 150 of the plant maintenance support apparatus 1 according to some embodiments stores the inspection history, repair history, and replacement history of the self facility, and the inspection history, repair history, replacement history, and accident history of 10 the other facilities, as described above. The database 150 may be installed at the same location as the plant maintenance support apparatus 1 and directly connected to the plant maintenance support apparatus 1 by wired or wireless means, or it may be remote from the plant maintenance support apparatus 1 and connected via, for example, a public communication line network. 15
[0041] (Damage degree calculation unit 103) The damage degree calculation unit 103 of the plant maintenance support apparatus 1 according to some embodiments calculates the damage degree of the inspection portion included in the recommended inspection range of the self facility, as described later. Herein, the damage degree of the inspection portion is an index indicating the degree of damage at the 20 inspection portion, more precisely, at the portion that is recommended to be inspected. To give an example, in the case of the wall thickness of the sewage pipe 30 of the self facility, the damage degree of the sewage pipe 30 is, for example, the amount of decrease in wall thickness (thickness reduction amount) of the sewage pipe 30. In this case, the damage degree calculation unit 103 calculates, for example, the thickness reduction amount, specifically, the 25 difference between the original thickness of the sewage pipe 30, i.e., the thickness before use, and the thickness of the sewage pipe 30 measured in the previous inspection. The damage degree calculation unit 103 determines that the greater the calculated thickness reduction 12
amount, the higher the damage degree. That is, the damage degree of the inspection portion is an index indicating the degree of damage obtained from the previous inspection result. The information on the damage degree thus calculated can be presented to the operator together with the information on the recommended inspection range prior to the present 5 inspection, as described later.
[0042] (Damage probability calculation unit 105) The damage probability calculation unit 105 of the plant maintenance support apparatus 1 according to some embodiments calculates, for each of the inspection portions of the sewage treatment facility 10 or the sewage pipe 30, the damage probability of each of the inspection 10 portions, using the inspection result including measurement values indicating damage to each of the inspection portions. Herein, the damage probability of the inspection portion indicates a probability that damage to each of the inspection portions reaches an allowable limit, which can be obtained from the present inspection. Specifically, the damage probability calculation unit 105 estimates the distribution of the 15 measurement values as a population estimated by statistical processing of the measurement values of each inspection portion. In this estimation, for example, it is assumed that the distribution coincides with one of various probability distributions such as standard normal distribution, t-distribution, or chi-square distribution. The damage probability calculation unit 105 estimates the distribution of the measurement values as a population, assuming that the 20 measurement values of each inspection portion follow the assumed distribution. Then, the damage probability calculation unit 105 calculates the proportion of the portion that reaches a threshold Th of the measurement values corresponding to the allowable limit as the damage probability. Herein, the allowable limit is a threshold at which it is determined that repair or 25 replacement is required for the specified range including the inspection portion if the actual value at the inspection portion reaches this value. For example, in the case of the wall thickness of the sewage pipe 30, the allowable limit is a threshold of the wall thickness to
13
determine whether the sewage pipe 30 needs to be repaired or replaced, and if the wall thickness of the sewage pipe 30 is below the threshold, it is determined that the sewage pipe 30 needs to be repaired or replaced.
[0043] Thus, with the plant maintenance support apparatus 1 according to some embodiments, since the damage probability indicating the probability that damage to the 5 inspection portion reaches the allowable limit is calculated as described above, an appropriate index is obtained to describe the condition of the inspection portion at the time the inspection is performed.
[0044] (Determination unit 107) The determination unit 107 of the plant maintenance support apparatus 1 according to 10 some embodiments determines whether the measurement values associated with each of the inspection portions includes abnormal data, as described later. Specifically, the determination unit 107 determines whether abnormal data is included in the measurement values obtained by the inspection among the input contents received by the input receiving unit 110. Herein, the abnormal data can include, for example, the following (1) and (2): 15 (1) a measurement value indicating that damage to the inspection portion reaches the allowable limit; (2) a measurement value that cannot be taken at the inspection portion.
[0045] The measurement value that cannot be taken at the inspection portion mentioned in (2) is a measurement value that is physically impossible, for example, the thickness at the 20 inspection portion before use is 20 mm, but the measurement value is 30 mm. Such a value may be measured due to, for example, (a) inspecting a completely different inspection portion, (b) inspecting a portion that is very close to the correct inspection portion, but the measurement values are completely different from those obtained by the correct inspection portion, (c) inspecting the correct inspection portion but using the wrong inspection 25 method, or (d) simply entering wrong values. The case (b) may be, for example, the case where, in thickness measurement, a different material (another material) from the material pertaining to the inspection portion is overlapped 14
in the immediate vicinity of the correct inspection portion, and the thickness where the material pertaining to the inspection portion and the other portion are overlapped is measured.
[0046] (Display command generation unit 120) The display command generation unit 120 of the plant maintenance support apparatus 1 according to some embodiments generates a display command for displaying on the display 5 device 170, as described later. The display command generation unit 120 of the plant maintenance support apparatus 1 according to some embodiments includes a first display command generation unit 121, a second display command generation unit 122, and a third display command generation unit 123. The first display command generation unit 121 is configured to generate a first display 10 command for displaying on the display device 170 the inspection portions in a format that allows the magnitude relationship between the damage probabilities to be grasped. The second display command generation unit 122 is configured to generate a second display command for displaying on the display device 170 the recommended inspection range of the plant. 15 The third display command generation unit 123 is configured to generate a third display command for displaying on the display device 170 the damage degree of the inspection portion included in the recommended inspection range.
[0047] FIG. 2 is a flowchart for describing plant maintenance support processing performed in the plant maintenance support apparatus 1 according to some embodiments. The processing 20 in each step shown in the flowchart of FIG. 2 is performed by the processor (not shown) of the computing device 100.
[0048] The plant maintenance support processing performed in the plant maintenance support apparatus 1 according to some embodiments includes a specification input step S11, a recommended inspection range extraction step S13, a damage degree calculation step S15, a 25 recommended inspection range display step S17, an inspection result input step S21, an abnormal data determination step S23, a damage probability calculation step S25, and a calculation result display step S27.
15
[0049] (Specification input step S11) The specification input step S11 is a step of receiving input of specification information of the plant prior to inspecting the plant. FIG. 3 shows an example of a screen displayed on the display device 170 in the specification input step S11. For example, when inspecting the sewage pipe 30, the display 5 command generation unit 120 generates a display command for displaying on the display device 170 an input display 210 for inputting the specification of the sewage treatment facility 10, as shown in FIG. 3, and transmits the display command to the display device 170. For example, when information for identifying the individual sewage treatment facility 10 (e.g., the name of municipality) is input from the input device 130, the computing device 10 100 reads pre-registered specification information of the sewage treatment facility 10 pertaining to the input information (e.g., city A in XX prefecture) from the database 150. Then, the computing device 100 causes the display command generation unit 120 to generate a display command for displaying on the display device 170 the input display 210 for the sewage treatment facility 10 in city A, for example. The display command generation unit 120 outputs 15 the generated display command to the display device 170. The pre-registered specification information is, for example, information on the sewage flow rate and the population (e.g., approximate population of less than 100,000, 100,000 to 500,000, 500,000 to 1,000,000, more than 1,000,000, etc.) of the sewage treatment facility 10 in city A, and the date of construction of the sewage treatment facility 10 in city A (e.g., the 20 date of start of operation of the sewage treatment facility 10 in city A).
[0050] In an example of the input display 210 shown in FIG. 3, the information on the sewage flow rate, the population, and the date of construction of the sewage treatment facility 10 in city A, which is read by the computing device 100 from the database 150, is displayed on the display device 170 with the information previously entered in entry fields 212, 213, 214. 25 In FIG. 3, the three asterisks (***) in the entry fields 212, 213, 214 indicate that information has been entered in the entry fields 212, 213, 214. In the example of FIG. 3, the three asterisks in the entry field 212 indicate that the sewage flow rate has been already entered. 16
Similarly, the three asterisks in the entry field 213 indicate that the population has been already entered, and the three asterisks in the entry field 214 indicate that the date of construction of the sewage treatment facility 10 in city A has been already entered. In the following, three asterisks are used to indicate that some information has already been entered in FIG. 4 and subsequent figures. 5
[0051] The operator enters the scheduled date of inspection in an inspection date entry field 211 of the input display 210 shown on the display device 170 by using the input device 130. Further, for example, if the sewage flow rate in the sewage treatment facility 10 in city A changes from before due to population changes, etc., the operator enters the sewage flow rate of the sewage treatment facility 10 in city A in the sewage flow rate entry field 212 of the input 10 display 210 shown on the display device 170 by using the input device 130. The operator enters the population in the population entry field 213 of the input display 210 shown on the display device 170 by using the input device 130. However, the information on the sewage flow rate, the population, and the date of construction of the sewage treatment facility 10 in city A may not be previously entered in the 15 entry fields 212, 213, 214. If the information on the sewage flow rate, the population, and the date of construction of the sewage treatment facility 10 in city A is not previously entered in the entry fields 212, 213, 214, the operator enters the information on the sewage flow rate, the population, and the date of construction of the sewage treatment facility 10 in city A in the entry fields 212, 213, 214. 20
[0052] After entering the specification information, when the operator selects an inspection range display button 217, the input receiving unit 110 of the computing device 100 receives input of the specification information from the input device 130. Then, the computing device 100 performs processings in the recommended inspection range extraction step S13 and the damage degree calculation step S15, and displays information regarding the recommended 25 inspection range on the display device 170 in the recommended inspection range display step S17.
[0053] (Recommended inspection range extraction step S13)
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First, the recommended inspection range extraction step S13 will be described. The recommended inspection range extraction unit 102 of the computing device 100 extracts the recommended inspection range that is recommended to be inspected this time in the recommended inspection range extraction step S13. More specifically, as described above, the recommended inspection range extraction unit 5 102 extracts the recommended inspection range that is recommended to be inspected this time from the inspection history, repair history, and replacement history of the self facility stored in the database 150. When extracting the recommended inspection range, the recommended inspection range extraction unit 102 may extract the recommended inspection range of the self facility by extracting a portion that is prone to wear, based on the inspection history, repair 10 history, replacement history, accident history, etc., of the sewage treatment facility 10 and sewage pipes 30 in another municipality having substantially the same sewage flow rate and population as those of city A of the self facility (hereinafter referred to as similar other facility) among the other facilities described above, for example.
[0054] For example, if the self facility is relatively new, the amount of information on the 15 above-described histories of the self facility stored in the database 150 may not be sufficient to extract the recommended inspection range. Even in this case, when the recommended inspection range of the self facility is extracted by extracting a portion that is prone to wear, based on the inspection history, repair history, replacement history, accident history, etc., of the similar other facility, it is possible to improve the accuracy of extraction of the recommended 20 inspection range. In other words, by referring to the inspection history, repair history, replacement history, accident history, etc., of the similar other facility, it is possible to reduce the omission of extraction of inspection ranges that are highly necessary to be extracted as the recommended inspection range. Further, by referring to the inspection history, repair history, replacement history, accident history, etc., of the similar other facility, it is possible to suppress 25 the extraction of inspection ranges that are less necessary to be extracted as the recommended inspection range.
[0055] (Damage degree calculation step S15)
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After extracting the recommended inspection range, the damage degree calculation unit 103 of the computing device 100 calculates the damage degree of the inspection portion included in the recommended inspection range of the self facility in the damage degree calculation step S15. More specifically, the damage degree calculation unit 103 refers to information stored in the database 150 and calculates the damage degree of the inspection 5 portion included in the recommended inspection range, based on the condition of the self facility before use and measurement values taken in the previous inspection, as described above. Further, the damage degree calculation unit 103 refers to information on, for example, the similar other facility stored in the database 150 and calculates the damage degree of a portion of the similar other facility corresponding to the inspection portion included in the 10 recommended inspection range of the self facility.
[0056] For example, if the self facility is relatively new, the amount of information on the self facility stored in the database 150 may not be sufficient to calculate the damage degree. Even in this case, when the damage degree of the self facility is calculated by referring to information on the similar other facility, it is possible to improve the accuracy of calculation of 15 the damage degree.
[0057] (Recommended inspection range display step S17) FIG. 4 shows an example of a screen displayed on the display device 170 in the recommended inspection range display step S17. As described above, when the inspection range display button 217 is selected in the input display 210 shown in FIG. 3, the computing 20 device 100 performs processings in the recommended inspection range extraction step S13 and the damage degree calculation step S15, and causes the display device 170 to display a recommended inspection range display 220 shown in FIG. 4. Specifically, in the recommended inspection range display step S17, the second display command generation unit 122 of the computing device 100 generates a second display command for displaying on the 25 display device 170 the recommended inspection range display 220 shown in FIG. 4, and outputs it to the display device 170. Thus, the recommended inspection range of the plant can be presented.
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[0058] The second display command generation unit 122 may generate the second display command so that the recommended inspection ranges extracted by the recommended inspection range extraction unit 102 are given priority based on the order of high damage tendency, i.e., the inspection range with higher damage tendency is arranged on the upper row in the recommended inspection range display 220 shown in FIG. 4, and output it to the display device 5 170. Here, the damage tendency is the degree of damage estimated from the inspection history, repair history, replacement history, etc., of the self facility stored in the database 150. However, the damage tendency may be the degree of damage estimated from the inspection history, repair history, replacement history, etc., stored in the database 150 for the similar other facility. 10
[0059] Thus, with the plant maintenance support apparatus 1 according to some embodiments, the second display command generation unit can generate the second display command so as to display the recommended inspection range of the plant on the display device 170 in order of high to low damage tendency. As a result, since the recommended inspection range of the plant can be presented in order 15 of high to low damage tendency, the operator can grasp an inspection range that should be prioritized among recommended inspection ranges.
[0060] In the recommended inspection range display 220 shown in FIG. 4, for example, a selection field 221, a line display field 222, an event display field 223, and an inspection method display field 224 are displayed in the tabular form for each inspection portion included in the 20 recommended inspection range. The selection field 221 is an entry field for selecting a portion for which detailed information is to be displayed, as described below. The line display field 222 is a display field for displaying the inspection portion. For example, in the case of the sewage pipe 30, the type of inspection section, such as the factory 25 line 31 where sewage discharged from the factory 21 flows, or the home line 32 where sewage discharged from the home 22 flows, is displayed. The event display field 223 is a display field for displaying an expected event for each 20
inspection portion (also referred to as inspection line or line, simply). The inspection method display field 224 is a display field for displaying the inspection method that is recommended for each line. Further, a detail button 227 is a button for displaying on the display device 170 more detailed information about the line selected in the selection field 221. 5
[0061] For example, as shown in FIG. 4, when the operator selects the factory line shown in the uppermost row (first row) among the lines shown in the recommended inspection range display 220 and then selects the detail button 227, the second display command generation unit 122 of the computing device 100 generates the second display command for displaying on the display device 170 a recommended inspection range detail display 230 shown in FIG. 5 for the 10 line pertaining to the row selected in the selection field 221 shown in FIG. 4, and transmits it to the display device 170. In the following, for information displayed in the tabular form on the display device 170, a horizontal arrangement of the table is referred to as a row, and a vertical arrangement of the table is referred to as a column. Specifically, the uppermost row of the table is the first row, 15 followed by the second row, third row, and so on. For example, in the recommended inspection range display 220 of FIG. 4, a number is entered in the leftmost column. In the example shown in FIG. 4, the number entered in the leftmost column corresponds to the row number in the recommended inspection range display 220. However, if the recommended inspection range display 220 is sorted by the line name, the number entered in the leftmost 20 column no longer correspond to the row number in the recommended inspection range display 220.
[0062] For example, in the recommended inspection range detail display 230 shown in FIG. 5, for the factory line selected in the selection field 221 in FIG. 4, information is displayed in the tabular form for each more detailed section of the factory line, such as section A of the 25 factory line, section B of the factory line, and section C of the factory line. A selection field 231 is an entry field for selecting a portion for which information on the damage degree is to be displayed, as described below.
21
A line display field 232 is a display field for displaying the inspection portion. An event display field 233 is a display field for displaying an expected event for each inspection portion. A section display field 234 is a display field for displaying the detailed position of the inspection portion. 5 A remark display field 235 is a display field for displaying, for each detailed position displayed in the section display field 234, information whether or not there is countermeasure history such as repair history or replacement history, or whether or not a portion with high damage probability is included in past inspections, for example.
[0063] A detailed position reference field 236 is a display field for indicating the display of 10 information on the more detailed position. For example, when the detailed position reference field 236 in the first row of the recommended inspection range detail display 230 is selected as shown in FIG. 5, information on the damage degree for section A of the factory line 31 is displayed as shown in FIG. 6.
[0064] FIG. 6 is a diagram showing an example of a screen which schematically shows the 15 damage condition of the sewage pipe 30. A detailed position display 240 shown in FIG. 6 schematically shows the damage condition of the section of the row for which the detailed position reference field 236 has been selected in the recommended inspection range detail display 230 shown in FIG. 5. In the detailed position display 240 shown in FIG. 6, the section is shown schematically, divided into multiple squares for each point (see FIG. 9). In the 20 example shown in FIG. 6, the section A is shown schematically, and one square 241 represents a specified range of the section A, i.e., one point. Therefore, the position of each square 241 in the detailed position display 240 represents an approximate position in the section A. In the example shown in FIG. 6, the damage degree in the section A is represented by the shading of the color of the squares. The darker the color of the squares, the higher the damage 25 degree calculated in the damage degree calculation step S15.
[0065] Specifically, as shown in FIG. 5, when the detailed position reference field 236 in any of the rows in the recommended inspection range detail display 230 is selected, the process 22
proceeds to the recommended inspection range display step S17, and the third display command generation unit 123 of the computing device 100 generates a third display command for displaying on the display device 170 the detailed position display 240 shown in FIG. 6 and detailed position displays 240 shown in FIGs. 7 and 8, which will be described later, and outputs it to the display device 170. In other words, the third display command is a display command 5 for displaying on the display device 170 the damage degree of the inspection portion included in the recommended inspection range. The third display command generation unit 123 generates the third display command so as to include a display command for displaying on the display device 170 the damage degree of the inspection portion in a format that allows the position of the inspection portion to be grasped, as shown in FIGs. 6 to 8. 10 Thus, with the plant maintenance support apparatus 1 according to some embodiments, the operator can easily grasp the position of a portion that should be inspected with priority among inspection portions included in the recommended inspection range.
[0066] The detailed position display 240 shown in FIG. 6 is a detailed position display 240A indicating the damage degree of the section A calculated in the damage degree calculation 15 step S15. For example, when a selected facility switching unit 242 is instructed to display the damage degree of the similar other facility calculated in the damage degree calculation step S15, a detailed position display 240B, which represents the damage degree of a section of the similar other facility corresponding to the section A calculated in the damage degree calculation step S15, is displayed on the display device 170 as shown in FIG. 7. The section of the similar 20 other facility corresponding to the section A is, for example, the same type of line (factory line 31) as the section A, with the layout of the sewage pipe, i.e., the layout of straight pipe sections, bends, etc., similar to the section A. Further, when the selected facility switching unit 242 is instructed to display both the damage degree of the section A and the damage degree of the similar other facility calculated 25 in the damage degree calculation step S15, a detailed position display 240C, which represents the damage degree of the section A and the damage degree of the section of the similar other facility corresponding to the section A calculated in the damage degree calculation step S15 in 23
a superposed manner, is displayed on the display device 170 as shown in FIG. 8. Thus, with the plant maintenance support apparatus 1 according to some embodiments, since the damage degree of the inspection portion can be presented prior to the present inspection based on the previous inspection result of the self facility or the similar other facility, the operator can grasp an inspection portion that should be prioritized among inspection 5 portions included in the recommended inspection range. Thus, it is possible to efficiently perform the inspection.
[0067] Instead of the detailed position display 240B shown in FIG. 7, the damage degree of a section of the self facility corresponding to the section A, i.e., a section of the self facility which is the same type of line (factory line 31) as the section A with the layout of the sewage 10 pipe similar to the section A, may be displayed on the display device 170. Further, instead of the detailed position display 240C shown in FIG. 8, the damage degree of the section A and the damage degree of the section of the self facility corresponding to the section A may be displayed in a superposed manner.
[0068] For example, in FIG. 6, when a scrolling indication unit 243 is operated to instruct 15 the screen of the display device 170 to display the area lower than the detailed position display 240 shown in FIG. 6, an explanatory diagram 245 of the section A is displayed on the display device 170 as shown in FIG. 9. The explanatory diagram 245 contains, for example, information on the section A, including the name and position of each of the points into which the section A is further divided between the start and end points of the section A. 20 That is, in some embodiments, the third display command generation unit 123 generates the third display command so as to include a display command for displaying on the display device 170 the position and the name of the inspection portion. This allows even an unfamiliar operator to easily grasp the position and name of the inspection portion by checking the explanatory diagram 245. 25
[0069] Here, in FIG. 5, when any row is selected in the selection field 231 and an export button 237 is selected, the process proceeds to the inspection result input step S21.
[0070] (Inspection result input step S21)
24
In the inspection result input step S21, an input display 310 of the inspection result as shown in FIG. 10 is displayed on the display device 170. Specifically, in FIG. 5, when any row is selected in the selection field 231 and the export button 237 is selected, the display command generation unit 120 generates a display command for displaying the input display 310 of the inspection result for the portion pertaining to the row selected in the selection field 5 231 in FIG. 5, and outputs it to the display device 170. In the input display shown in FIG. 10, the operator enters the start date of the inspection in an instruction start date entry field 311 and the end date of the inspection in an instruction end date entry field 313. After inspecting each recommended inspection portion in the recommended inspection range, the operator enters the inspection result in a measurement value 10 entry field 315 in the input display 310 shown in FIG. 10.
[0071] FIG. 11 is a diagram showing a screen 320 displaying the list of inspection results. Specifically, when the input of inspection results is completed in the input display 310 shown in FIG. 10 and it is instructed to store the input content in the database 150, the computing device 100 stores the input content in the measurement value entry field 315 in the database 15 150. Then, the display command generation unit 120 generates a display command for displaying on the display device 170 the screen 320 displaying the list of inspection results, and outputs it to the display device 170. As a result, the screen 320 is displayed on the display device 170.
[0072] (Abnormal data determination step S23) 20 In the screen 320 shown in FIG. 11, when a damage probability calculation instruction button 321 or a future risk calculation instruction button 322 is selected, the process proceeds to the abnormal data determination step S23, and the determination unit 107 determines whether the input measurement values include abnormal data. Specifically, the determination unit 107 determines whether there is a measurement value corresponding to the above (1) or (2). 25
[0073] (Damage probability calculation step S25) In the damage probability calculation step S25, the damage probability calculation unit 105 calculates the damage probability of each inspection portion, based on the measurement 25
values input in the inspection result input step S21, as described above. In the abnormal data determination step S23, the damage probability calculation unit 105 uses a measurement value corresponding to the above (1), indicating that damage to the inspection portion reaches the allowable limit, for the calculation of the damage probability, but does not use a measurement value corresponding to the above (2) that cannot be taken at the inspection portion, for the 5 calculation of the damage probability. Thus, with the plant maintenance support apparatus 1 according to some embodiments, since a measurement value that cannot be taken at the inspection portion, which corresponds to the above (2), is not used for the calculation of the damage probability, the reliability of the calculated damage probability can be improved. 10
[0074] In the screen 320 shown in FIG. 11, when the damage probability calculation instruction button 321 is selected, the damage probability calculation unit 105 calculates the damage probability of each inspection portion at the time the inspection is performed. Further, in the screen 320 shown in FIG. 11, when the future risk calculation instruction button 322 is selected, the damage probability calculation unit 105 calculates the damage 15 probability of each inspection portion at the time the inspection is performed, and also calculates the future damage probability. Specifically, the damage probability calculation unit 105 predicts the future transition of individual measurement values at each inspection portion and calculates the future damage probability based on the predicted values. For example in the case of the wall thickness of the pipe, the future wall thickness is calculated from the 20 thickness reduction rate determined from previous inspection results, and from measurement values of the wall thickness. The future damage probability is then calculated based on the calculated wall thickness values. Thus, with the plant maintenance support apparatus 1 according to some embodiments, not only the present damage probability, but also the future damage probability of the inspection 25 portion can be obtained. This makes it easier to determine the necessity of measures such as repair or replacement of the inspection portion.
[0075] (Calculation result display step S27)
26
In the calculation result display step S27, the damage probability calculated in the damage probability calculation step S25 is displayed on the display device 170. The first display command generation unit 121 generates a first display command for displaying on the display device 170 the inspection portions in a format that allows the magnitude relationship between the respective damage probabilities to be grasped, and outputs it to the display device 170. 5 For example, in the screen 320 shown in FIG. 11, when the damage probability calculation instruction button 321 is selected, the damage probability calculated as described above is displayed in the tabular form as shown in a damage probability display 400A of FIG. 12. Specifically, in the screen 320 shown in FIG. 11, when the damage probability calculation instruction button 321 is selected, the process proceeds to the calculation result display step 10 S27, and the first display command generation unit 121 generates a first display command for displaying on the display device the damage probability display 400A shown in FIG. 12, and outputs it to the display device 170. In the damage probability display 400A shown in FIG. 12, numerical values of the damage probabilities of multiple inspection portions are displayed, for example, in a damage probability display field 406. 15 The damage probability for each point in each section may be represented by the shading of the color of the squares, as in the detailed position display 240 shown in FIG. 6.
[0076] Further, in the screen 320 shown in FIG. 11, when the future risk calculation instruction button 322 is selected, the damage probability calculated as described above is displayed in the tabular form as shown in a damage probability display 400B of FIG. 13. 20 Specifically, in the screen 320 shown in FIG. 11, when the future risk calculation instruction button 322 is selected, the process proceeds to the calculation result display step S27, and the first display command generation unit 121 generates a first display command for displaying on the display device the damage probability display 400B shown in FIG. 13, and outputs it to the display device 170. 25 As shown in FIG. 13, for the inspection portion selected in a selection field 401 of the damage probability display 400B, the transition of the damage probability is displayed in a graph 421 representing the future transition of the damage probability. In the damage 27
probability display 400B shown in FIG. 13, numerical values of the damage probabilities of multiple inspection portions may be displayed in the tabular form, as with the damage probability display field 406 in the damage probability display 400A shown in FIG. 12.
[0077] In the damage probability display 400 (400A, 400B) shown in FIGs. 12 and 13, the inspection portion with higher damage probability is displayed in the upper row. Further, 5 when the inspection portion has higher damage probability than a preset threshold, the row for this inspection portion is colored to make it stand out, as shown by the row 411. In other words, the first display command generation unit 121 generates a first display command for displaying on the display device 170 the inspection portions in a format that allows the magnitude relationship between the respective damage probabilities to be grasped, and outputs 10 it to the display device 170.
[0078] Thus, with the plant maintenance support apparatus 1 according to some embodiments, since the magnitude relationship between the damage probabilities can be grasped, the priority and necessity of actions such as replacement, repair, and additional inspection are clarified. For example, if the operator determines that the damage probability 15 displayed on the display device is clearly high, he can determine that repair, replacement, or other action is necessary. Conversely, for example, if the operator determines that the damage probability displayed on the display device is clearly low, he can determine no measure is necessary. For example, if the operator determines that the damage probability displayed on the display device is not clearly high or low, he can determine that additional inspection is 20 necessary.
[0079] If the measurement values of the inspection portion even with relatively low damage probability include abnormal data, the row for this inspection portion is colored to make it stand out, as shown by the row 415.
[0080] Thus, with the plant maintenance support apparatus 1 according to some 25 embodiments, the first display command generation unit 121 generates, as the first display command, a display command for displaying on the display device 170 the inspection portions in a format that allows the magnitude relationship between the respective damage probabilities
28
to be grasped, and for displaying on the display device 170 the inspection portions so that the inspection portion where the inspection result including the abnormal data has been obtained can be identified.
[0081] For example, when the inspection portions are arranged in order of high damage probability and displayed on the display device 170, an inspection portion with low damage 5 probability is less conspicuous on the screen of the display device 170 than an inspection portion with high damage probability. If abnormal data is included in the measurement values of the inconspicuous inspection portion, it is easy to overlook the fact that the abnormal data is included. In this regard, with the plant maintenance support apparatus 1 according to some 10 embodiments, since the inspection portion where the inspection result including the abnormal data has been obtained can be identified on the screen of the display device 170, the operator can easily grasp that the abnormal data is included in the measurement values. Further, with the plant maintenance support apparatus 1 according to some embodiments, it is possible to grasp whether the measurement values include at least one of a measurement 15 value indicating that damage to the inspection portion reaches the allowable limit or a measurement value that cannot be taken at the inspection portion.
[0082] For example, in FIG. 12 and FIG. 13, when the row 415 is selected, an information display 500 regarding the measurement values of the inspection portion pertaining to the row 415 is displayed on the display device 170, as shown in FIG. 14. Specifically, in FIG. 12 and 20 FIG. 13, when the row 415 is selected, the display command generation unit 120 generates a display command for displaying on the display device 170 the information display 500 as shown in FIG. 14, and outputs it to the display device 170.
[0083] The information display 500 shown in FIG. 14 includes a table 510 which shows information on a portion including abnormal data and a list 520 of inspection data of this portion. 25 The information display 500 shown in FIG. 14 is an example of the case where the inspection portion including abnormal data is a pipe, and the inspection content is the wall thickness measurement of the tube.
29
In the example shown in FIG. 14, the table 510 includes, for example, a line display field 511, a section display field 512, a nominal wall thickness display field 513, a required thickness display field 514, and an exclusion threshold display field 515. The line display field 511 is a display field for displaying the portion (line) including abnormal data. 5 The section display field 512 is a display field for displaying the detailed position of this portion.
[0084] The nominal wall thickness display field 513 is a display field for displaying the nominal wall thickness of the portion. The nominal wall thickness is the design wall thickness of the portion before the start of use of the self facility. For example, in the example shown 10 in FIG. 14, the nominal wall thickness shall be set to 14.4 (mm).
[0085] The required thickness display field 514 is a display field for displaying the thickness (required thickness) required in the portion. The required thickness is, for example, the allowable limit described above. For example, in the example shown in FIG. 14, the required thickness is set to 12.33 (mm). In the example shown in FIG. 14, the determination 15 unit 107 determines that the measurement value below the required thickness is a measurement value, corresponding to the above (1), indicating that damage to the inspection portion reaches the allowable limit.
[0086] The exclusion threshold display field 515 is a threshold by which the determination unit 107 determines whether to use the measurement value in the calculation of the damage 20 probability of the portion. For example, in the example shown in FIG. 14, the threshold is set to 18 (mm). In the example shown in FIG. 14, the determination unit 107 determines that the measurement value exceeding the threshold is a value, corresponding to the above (2), that cannot be taken at the inspection portion.
[0087] The list 520 shows the measurement values of the portion in the tabular form, for 25 example. In the example shown in FIG. 14, measurement values at five positions in the portion are displayed in display fields 521 to 525. In the list 520, for example, the measurement value of data No. 5 is a measurement value, corresponding to the above (1), 30
indicating that damage to the inspection portion reaches the allowable limit, and the display field 525 is colored, for example, to make it stand out. Similarly, in the list 520, for example, the measurement value of data No. 4 is a measurement value, corresponding to the above (2), that cannot be taken at the inspection portion, and the display field 524 is colored, for example, to make it stand out. 5 Thus, the display command generation unit 120 according to some embodiments generates display data for displaying the list 520 so that abnormal data is displayed in a form different from other data in the list 520, and outputs it to the display device 170.
[0088] The present invention is not limited to the embodiments described above, but includes modifications to the embodiments described above, and embodiments composed of 10 combinations of those embodiments. For example, in the above-described embodiments, as shown in FIG. 6, the damage degree of the section A calculated in the damage degree calculation step S15, i.e., the index indicating the degree of damage of the section A, obtained from the previous inspection results for the section A, is represented by the shading of the squares according to the magnitude of the value. 15 However, for example, instead of the damage degree of the section A, the damage probability of the section A obtained based on the previous inspection results for the section A may be represented by the shading of the squares according to the magnitude of the damage probability. In this case, for example in the case of the wall thickness of the pipe, the present wall thickness may be calculated from the thickness reduction rate for the section A determined 20 from previous inspection results, and from previous measurement values of the wall thickness. The present damage probability may then be calculated based on the calculated wall thickness values.
[0089] In the foregoing, the case where the plant subject to support by the plant maintenance support apparatus 1 according to some embodiments is, for example, a sewage 25 treatment facility and a sewage pipe connecting the source of sewage to the sewage treatment facility has been described. However, the plant subject to support by the plant maintenance support apparatus 1 according to some embodiments may be, for example, a water supply 31
facility (water purification plant), a water supply pipe, a chemical product manufacturing plant, or a boiler.
Reference Signs List
[0090] 5
1 Plant maintenance support apparatus
100 Computing device
103 Damage degree calculation unit
105 Damage probability calculation unit
111 Inspection result receiving unit 10
121 First display command generation unit
122 Second display command generation unit
123 Third display command generation unit
150 Database
170 Display device 15
32
I/We Claim:
1. A plant maintenance support apparatus, comprising: a damage probability calculation unit configured to, for each of a plurality of inspection portions of a plant, calculate a damage probability indicating a probability that damage to each 5 of the inspection portions reaches an allowable limit, using an inspection result including a plurality of measurement values indicating the damage of each of the inspection portions; and a first display command generation unit configured to generate a first display command for displaying on a display device the plurality of inspection portions in a format that allows a magnitude relationship between the respective damage probabilities to be grasped. 10
2. The plant maintenance support apparatus according to claim 1, wherein the damage probability calculation unit calculates, as the damage probability, a proportion of a portion that reaches a threshold of the measurement values corresponding to the allowable limit in a distribution of the measurement values as a population estimated by 15 statistical processing of the plurality of measurement values of each of the inspection portions.
3. The plant maintenance support apparatus according to claim 1 or 2, further comprising a determination unit configure to whether the plurality of measurement values associated with each of the inspection portions includes abnormal data, 20 wherein the first display command generation unit is configured to generate, as the first display command, a display command for displaying on a display device the plurality of inspection portions in a format that allows a magnitude relationship between the respective damage probabilities to be grasped, and for displaying on the display device the plurality of inspection portions so that an inspection portion where the inspection result including the 25 abnormal data has been obtained can be identified.
4. The plant maintenance support apparatus according to claim 3,
33
wherein the abnormal data is at least one of a measurement value indicating that damage to the inspection portion reaches the allowable limit or a measurement value that cannot be taken at the inspection portion.
5. The plant maintenance support apparatus according to claim 3 or 4, 5 wherein the determination unit at least determines whether each measurement value is a value that cannot be taken at the inspection portion, and wherein the damage probability calculation unit calculates the damage probability without using, among the abnormal data, the measurement value that is determined by the determination unit to be a value that cannot be taken at the inspection portion in calculation of the damage 10 probability.
6. The plant maintenance support apparatus according to any one of claims 1 to 5, further comprising: a second display command generation unit configured to generate a second display 15 command for displaying on the display device a recommended inspection range of the plant, based on specification information of the plant; and an inspection result receiving unit configured to receive input of the inspection result regarding the inspection portion included in the recommended inspection range. 20
7. The plant maintenance support apparatus according to claim 6, wherein the second display command generation unit is configured to generate the second display command so as to display the recommended inspection range of the plant on the display device in order of high to low damage tendency. 25
8. The plant maintenance support apparatus according to claim 6 or 7, comprising: a damage degree calculation unit configured to calculate a damage degree of the inspection portion included in the recommended inspection range based on at least one of a
34
previous inspection result associated with the inspection portion included in the recommended inspection range or a previous inspection result acquired on another plant including a portion corresponding to the inspection portion included in the recommended inspection range; and a third display command generation unit configured to generate a third display command for displaying on the display device the damage degree of the inspection portion included in the 5 recommended inspection range.
9. The plant maintenance support apparatus according to claim 8, wherein the third display command generation unit generates the third display command so as to include a display command for displaying on the display device the damage degree of 10 the inspection portion in a format that allows a position of the inspection portion to be grasped.
10. The plant maintenance support apparatus according to claim 8 or 9, wherein the third display command generation unit generates the third display command so as to include a display command for displaying on the display device a position and a name 15 of the inspection portion.