Title of invention: fiber optic sensing system, monitoring method, and non-temporary computer readable medium
Technical field
[0001]
This disclosure relates to an optical fiber sensing system, a monitoring method, and a non-temporary computer-readable medium.
Background technology
[0002]
In recent years, there is a system for monitoring buildings and premises using optical fibers (for example, Patent Document 1).
According to Patent Document 1, the shaking of the optical fiber caused by an intruder climbing on a fence or climbing on a ladder and the shaking of the optical fiber caused by other factors such as wind and snow are detected backward scattered light. It exhibits different aspects depending on the magnitude of the wavelength shift amount and the time of occurrence. The technique described in Patent Document 1 pays attention to this point and distinguishes between intrusion and other factors by recognizing the magnitude of the wavelength shift amount of the backward scattered light of the optical fiber.
Prior art literature
Patent documents
[0003]
Patent Document 1: Japanese Unexamined Patent Publication No. 2006-208061
Outline of the invention
Problems to be solved by the invention
[0004]
However, the technique described in Patent Document 1 does not disclose that the phenomenon caused by an intruder is specified by the dynamic change of the vibration pattern.
Furthermore, there are multiple types of events that occur due to a person such as an intruder, and although it cannot be determined that a single vibration is abnormal, it is necessary to determine that the vibration is abnormal over a certain period of time. There is also an event.
[0005]
For example, if there is a tunnel directly under the buried optical fiber, the event that a person walks in the tunnel can be detected once by one walk, but once if the tunnel is an unknown tunnel. It is not possible to conclude that an unknown tunnel exists just by walking. However, if walking continues discretely over a period of time, it can be determined that there is a high possibility that an unknown tunnel exists, and as a result, the phenomenon that a person moves in the tunnel is unknown. It can be judged that it is an abnormality suggesting the possibility of the existence of a tunnel.
[0006]
In this way, among various events, there are some events that cannot be judged as abnormal unless vibration over a certain period of time is detected. However, the technique described in Patent Document 1 has a problem that even if such an event is detected, it cannot be determined whether or not the detected event is abnormal.
[0007]
Therefore, an object of the present disclosure is an optical fiber sensing system, a monitoring method, which can solve the above-mentioned problems and can determine whether or not an event that cannot be determined to be abnormal unless vibration over a certain period of time is detected. And to provide non-temporary computer readable media.
Means to solve the problem
[0008]
The optical fiber sensing system according to one aspect is
A receiver that receives an optical signal from a sensing optical fiber,
A specific part that specifies the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal,
The acquisition unit that acquires the detection conditions related to the period according to the type of event specified by the specific unit, and the acquisition unit.
When the detection condition is satisfied, a determination unit for determining that the event specified by the specific unit is abnormal is provided.
[0009]
The monitoring method according to one aspect is
The reception step of receiving an optical signal from the sensing optical fiber,
A specific step to specify the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal,
The acquisition step to acquire the detection conditions related to the period according to the type of event specified in the specific step, and
When the detection condition is satisfied, the determination step of determining that the event specified in the specific step is abnormal is included.
[0010]
The non-temporary computer-readable medium according to one aspect is
On the computer
Reception procedure for receiving optical signals from sensing optical fiber,
A specific procedure for identifying the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal, and
The acquisition procedure for acquiring the detection conditions for the period according to the type of event specified in the specific procedure, and the acquisition procedure.
If the detection conditions are met, the judgment procedure for determining that the event specified by the specific procedure is abnormal, and the judgment procedure.
It is a non-temporary computer-readable medium that stores a program for executing.
Effect of the invention
[0011]
According to the above aspect, the present invention provides an optical fiber sensing system, a monitoring method, and a non-temporary computer-readable medium that can determine whether or not an event that cannot be determined to be abnormal without detecting vibration over a certain period of time is abnormal. The effect of being able to do it is obtained.
A brief description of the drawing
[0012]
FIG. 1 is a diagram showing a configuration example of an optical fiber sensing system according to a first embodiment.
FIG. 2 is a diagram showing an example of sensing data generated by a specific unit according to the first embodiment.
FIG. 3 is a flow chart showing an example of an overall operation flow of the optical fiber sensing system according to the first embodiment.
FIG. 4 is a diagram showing a configuration example of an optical fiber sensing system according to a second embodiment.
FIG. 5 is a diagram showing an example of a correspondence table stored in the storage unit according to the second embodiment.
FIG. 6 is a diagram showing an example of a GUI screen displayed on the display unit by the notification unit according to the second embodiment.
FIG. 7 is a diagram showing an example of a GUI screen displayed on the display unit by the notification unit according to the second embodiment.
FIG. 8 is a diagram showing an example of a GUI screen displayed on the display unit by the notification unit according to the second embodiment.
FIG. 9 is a diagram showing an example of a GUI screen displayed on the display unit by the notification unit according to the second embodiment.
FIG. 10 is a diagram showing an example of a GUI screen displayed on the display unit by the notification unit according to the second embodiment.
FIG. 11 is a diagram showing an example of a GUI screen displayed on the display unit by the notification unit according to the second embodiment.
FIG. 12 is a diagram showing an example of a GUI screen displayed on the display unit by the notification unit according to the second embodiment.
FIG. 13 is a flow chart showing an example of an overall operation flow of the optical fiber sensing system according to the second embodiment.
[Fig. 14] Fig. 14 is a block diagram showing an example of a hardware configuration of a computer that realizes an optical fiber sensing device.
Embodiment for carrying out the invention
[0013]
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The following description and drawings have been omitted or simplified as appropriate for the sake of clarification of the explanation. Further, in each of the following drawings, the same elements are designated by the same reference numerals, and duplicate explanations are omitted as necessary. Further, in the embodiment described below, the fence installed along the boundary line such as a border and its surroundings will be described as a monitoring area, but the monitoring area is not limited to this.
[0014]

First, the configuration of the optical fiber sensing system according to the first embodiment will be described with reference to FIG. 1.
As shown in FIG. 1, the optical fiber sensing system according to the first embodiment monitors the fence F and its surroundings, and includes an optical fiber 10 and an optical fiber sensing device 20. Further, the optical fiber sensing device 20 includes a receiving unit 21, a specifying unit 22, an acquiring unit 23, and a determining unit 24.
[0015]
The optical fiber 10 is a sensing optical fiber laid on the fence F and one end or both ends thereof is connected to the receiving unit 21 of the optical fiber sensing device 20. However, the method of laying the optical fiber 10 is not limited to this. For example, a part of the optical fiber 10 may be laid on the fence F, and the remaining part of the optical fiber 10 may be buried in the ground around the fence F. Alternatively, the entire optical fiber 10 may be buried in the ground around the fence F. Further, the optical fiber 10 is not limited to being provided in a linear shape, and may be provided in a serpentine manner in parallel with the ground. Further, a plurality of optical fibers 10 may be provided.
[0016]
The receiving unit 21 incidents pulsed light on the optical fiber 10 and transmits the reflected light or scattered light generated by the pulsed light being transmitted through the optical fiber 10 to the return light (optical signal) via the optical fiber 10. ).
[0017]
Here, the fence F vibrates when an event such as a person grasping and shaking the fence F occurs. The vibration of the fence F is transmitted to the optical fiber 10, whereby the wavelength of the return light transmitted through the optical fiber 10 is changed. Therefore, the optical fiber 10 can detect the vibration of the fence F.
[0018]
In the first embodiment, it is assumed that the following types of events occur in and around the fence F, for example.
(1) A person grabs the fence F and shakes it.
(2) A person hits the fence F.
(3) A person climbs the fence F.
(4) A person hangs a ladder on the fence F and climbs the ladder.
(5) A person or animal walks around Fence F.
(6) A car, a motorcycle, or a train runs around Fence F.
(7) A person excavates a tunnel around fence F.
(8) People move in the tunnel around Fence F.
[0019]
The vibration pattern of the vibration of the fence F transmitted to the optical fiber 10 is a dynamically fluctuating fluctuation pattern, and differs depending on the type of events occurring in the fence F and its surroundings.
Therefore, the return light transmitted through the optical fiber 10 includes a vibration pattern according to the type of events occurring in the fence F and its surroundings. This vibration pattern is a unique pattern in which the strength of vibration, the position of vibration, the transition of fluctuations in frequency, and the like are different.
[0020]
For example, the specific unit 22 can acquire the vibration pattern included in the return light by generating the sensing data as shown in FIG. 2 based on the return light received from the optical fiber 10 by the reception unit 21. can. In FIG. 2, the horizontal axis indicates the position on the optical fiber 10 (distance from the optical fiber sensing device 20), and the vertical axis indicates the passage of time. The position on the optical fiber 10 can be specified, for example, based on the time difference between the time when the pulsed light is incident on the optical fiber 10 and the time when the return light is received from the optical fiber 10.
[0021]
The sensing data shown in FIG. 2 includes a dynamically fluctuating vibration pattern, and this vibration pattern differs depending on the type of events occurring in and around the fence F. Therefore, the specifying unit 22 identifies the occurrence of an event in and around the fence F and the type of the event that has occurred by analyzing the dynamic change of the vibration pattern included in the sensing data shown in FIG. Further, the specifying unit 22 identifies the position on the optical fiber 10 where the vibration pattern is generated as the position where the event is generated.
[0022]
Further, the specifying unit 22 may specify the direction in which the event has occurred based on the vibration pattern included in the return light received from the optical fiber 10. For example, when a plurality of optical fibers 10 are provided, the specifying unit 22 specifies the direction in which the event occurs based on the time-series change of the vibration pattern included in the return light received from each optical fiber 10. Can be done. Further, when the optical fiber 10 is provided in a meandering manner parallel to the ground, the direction in which the event occurs is determined based on the time-series change of the vibration pattern included in the return light received from each position on the optical fiber 10. Can be identified. Further, when the fence F is installed along the border, the specific unit 22 may specify from which country the event is approaching the border depending on the direction in which the event occurs and the magnitude of the vibration. good. Further, the specific unit 22 may set only an event approaching the border from a specific direction as a target for determining an abnormality.
[0023]
Further, the specifying unit 22 may specify an event occurring in the fence F and its surroundings by using pattern matching. For example, the specific unit 22 stores in advance a vibration pattern when the event occurs in a storage unit (not shown) as a matching pattern for each type of the event to be specified. When the specific unit 22 acquires the vibration pattern included in the return light, the specific unit 22 compares the acquired vibration pattern with the matching pattern. In the matching pattern, in the return light When there is a matching pattern whose matching rate with the included vibration pattern is equal to or greater than the threshold value, the specific unit 22 determines that an event corresponding to the matching pattern has occurred.
[0024]
Alternatively, the specific unit 22 may specify an event occurring in the fence F and its surroundings by using a learning model for specifying an event by a convolutional neural network (CNN). For example, the specific unit 22 inputs a plurality of sets of teacher data indicating an event occurring in and around the fence F and a vibration pattern when the event occurs, constructs a learning model in advance, and does not. It is stored in advance in the illustrated storage unit. When the specific unit 22 acquires the vibration pattern included in the return light, the specific unit 22 inputs the acquired vibration pattern to the learning model. As a result, the specific unit 22 obtains an event occurring in the fence F and its surroundings as an output result of the learning model.
[0025]
Here, for example, the phenomenon of "people moving in the tunnel around the fence F" described in (8) above is the tunnel when the tunnel is arranged across a boundary line such as a border. This is an event that should be detected in particular because there is a possibility of smuggling using.
[0026]
However, even if the above-mentioned event (8) can be detected by one vibration, it may not be distinguishable from the event (5) "a person or an animal walks around the fence F". If the tunnel is an unknown tunnel, it may not be possible to determine that the unknown tunnel exists with only one vibration. However, if the vibration lasts for a certain period of time, it can be determined that an unknown tunnel exists, and as a result, the above-mentioned event (8) can be determined to be abnormal.
[0027]
On the other hand, for example, the above-mentioned event (7) "a person excavates a tunnel around the fence F" can be detected by one vibration, and the same period as the above-mentioned event (8) can be detected. It is an event that can be judged as abnormal within a shorter period without monitoring.
[0028]
In this way, the period when it is judged that the event is abnormal is different for each type of event to be specified.
Therefore, in the first embodiment, the detection conditions for the period corresponding to the type of the event to be specified are set in advance for each type of the event, and are stored in advance in a storage unit (not shown).
[0029]
When the specific unit 22 specifies an event, the acquisition unit 23 acquires the detection condition regarding the period according to the type of the event specified by the specific unit 22, and the determination unit 24 acquires the detection condition acquired by the acquisition unit 23. In addition, it is determined that the event specified by the specific unit 22 is abnormal.
[0030]
Here, for example, the above-mentioned event detection condition of (8) is that the above-mentioned event (8) is detected more than a predetermined number of times in a period corresponding to the type of the above-mentioned event (8). , It was detected continuously for a predetermined time or more. Further, the above-mentioned event (8) has a longer period as compared with the above-mentioned event (7).
[0031]
Subsequently, with reference to FIG. 3, an example of the overall operation flow of the optical fiber sensing system according to the first embodiment will be described.
[0032]
As shown in FIG. 3, the receiving unit 21 receives the return light from the optical fiber 10 laid on the fence F (step S11), and the specific unit 22 receives the vibration included in the return light received by the receiving unit 21. Based on the pattern, the occurrence of an event in and around the fence F and the type of the event that has occurred are specified (step S12).
[0033]
Subsequently, the acquisition unit 23 acquires the detection condition regarding the period according to the type of the event specified by the specific unit 22 (step S13), and the determination unit 24 determines whether or not the detection condition acquired by the acquisition unit 23 is satisfied. Is determined (step S14).
[0034]
If the detection condition is satisfied in step S14 (Yes in step S14), the determination unit 24 determines that the event specified by the specific unit 22 is abnormal (step S15). On the other hand, if the detection condition is not satisfied (No in step S14), the process returns to the process of step S11.
[0035]
As described above, according to the first embodiment, the specifying unit 22 specifies the occurrence of an event and the type of the event that has occurred based on the vibration pattern included in the return light received from the optical fiber 10. The acquisition unit 23 acquires the detection condition regarding the period according to the type of the event specified by the specific unit 22. If the detection condition acquired by the acquisition unit 23 is satisfied, the determination unit 24 determines that the event specified by the specific unit 22 is abnormal.
[0036]
That is, according to the first embodiment, even when an event that is difficult to determine as abnormal unless vibration over a certain period is detected is specified, it is based on whether or not the detection condition for the period according to the type of the specified event is satisfied. Then, it is judged whether or not the specified event is abnormal. Therefore, it is possible to determine whether or not an event that cannot be determined to be abnormal unless vibration over a certain period of time is detected is abnormal.
[0037]

Subsequently, with reference to FIG. 4, a configuration example of the optical fiber sensing system according to the second embodiment will be described.
[0038]
As shown in FIG. 4, the optical fiber sensing system according to the second embodiment has a display unit 30 added as compared with the configuration of the first embodiment described above, and the optical fiber sensing device 20. It is different from the point that the storage unit 25 and the notification unit 26 are added to.
[0039]
The storage unit 25 provides information such as the time, position, type, ID (Identification) of the event specified by the specific unit 22, the vibration content when the event occurs, and whether or not the event corresponds to an abnormality. Is stored as history information. The history information may include at least information on the time when the event occurred, the position where the event occurred, the type, the content of the vibration, and whether or not the abnormality occurred. Further, when the specific unit 22 identifies the same event in the temporal and spatial vicinity, the storage unit 25 determines that these events are continuous events, and groups the IDs of these events into a single ID. Then, the information of the movement locus based on the occurrence position of these events is also stored as the history information.
[0040]
The storage unit 25 also stores the detection conditions for each type of event to be specified. Further, when the specific unit 22 uses pattern matching to specify an event, the storage unit 25 also stores a matching pattern for each type of the event to be specified. Further, when the specific unit 22 uses the learning model to specify an event, the storage unit 25 also stores the learning model.
[0041]
The display unit 30 is, for example, a display, a monitor, or the like installed in a monitoring center or the like that monitors the fence F and its surroundings. Alternatively, the display unit 30 may be the display of a portable terminal owned by a guard.
When the determination unit 24 determines that the event specified by the specific unit 22 is abnormal, the notification unit 26 displays a GUI (Graphical User Interface) screen indicating that the abnormality has occurred on the display unit 30 and notifies the alert. do.
[0042]
Here, in the second embodiment, the event to be specified is classified into a plurality of groups according to the period when the event is determined to be abnormal. Here, the events to be specified are described as being classified into three groups of short-term events, medium-term events, and long-term events, but the number of groups to be classified is not limited to three, and two. Anything above is fine.
[0043]
For example, the above-mentioned events (1) to (8) are classified as follows.
Short-term event:
(1) A person grabs the fence F and shakes it.
(2) A person hits the fence F.
(3) A person climbs the fence F.
(4) A person hangs a ladder on the fence F and climbs the ladder.
Medium-term event:
(5) A person or animal walks around Fence F.
(6) A car, a motorcycle, or a train runs around Fence F.
(7) A person excavates a tunnel around fence F.
Long-term event:
(8) People move in the tunnel around Fence F.
[0044]
In the first embodiment described above, when the specific unit 22 specifies an event, whether or not the specified event is abnormal is determined based on whether or not the detection condition for the period corresponding to the type of the specified event is satisfied. I was judging.
[0045]
However, the above-mentioned short-term event can be said to be an extremely vicious event or an event that requires immediate action, and may be immediately determined to be abnormal regardless of whether or not the detection conditions are satisfied. it is conceivable that. Therefore, if the event specified by the specific unit 22 is a short-term event and the determination unit 24 immediately determines that the specified event is abnormal, it is possible to quickly determine the abnormality. It is also possible to promptly start the measures to be taken after that (for example, dispatching an observer).
[0046]
Therefore, in the second embodiment, when the event specified by the specific unit 22 is a short-term event, the determination unit 24 determines that the event specified by the specific unit 22 is abnormal regardless of the detection conditions. .. As a result, it is possible to omit the process of acquiring the detection condition by the acquisition unit 23 and the process of determining whether or not the determination unit 24 satisfies the detection condition.
[0047]
On the other hand, when the event specified by the specific unit 22 is a long-term event or a medium-term event, the acquisition unit 23 acquires the detection conditions and the determination unit 24 detects the detection conditions, as in the first embodiment described above. When the condition is satisfied, it is determined that the event specified by the specific unit 22 is abnormal. The long-term event is an example of one of the first event and the second event, and the medium-term event is the other example of the first event or the second event.
[0048]
Subsequently, in the following, the method of determining whether or not the long-term event or the medium-term event specified by the specific unit 22 in the determination unit 24 is abnormal will be described in detail.
Here, the detection condition of the long-term event is, for example, that the long-term event is detected a predetermined number of times or more in a period according to the type of the long-term event, or that the long-term event is continuously detected for a predetermined time or more. be. The conditions for detecting medium-term events are the same as the conditions for detecting long-term events. However, the above-mentioned period of the medium-term event is shorter than that of the long-term event. The above-mentioned period may be different or the same for each type of long-term event. Further, the above-mentioned period may be different or the same for each type of medium-term event.
[0049]
When the specific unit 22 identifies a long-term event, the determination unit 24 is the same long-term event as the long-term event specified by the specific unit 22 in the period corresponding to the type of the long-term event, and has the same occurrence position or the same occurrence position. The history information about the long-term event that occurred in the vicinity thereof and the long-term event that includes the same occurrence position in the movement locus is extracted from the storage unit 25. Then, the determination unit 24 determines whether or not the detection condition is satisfied based on the history information extracted from the storage unit 25. As a result, if the detection condition is satisfied, the determination unit 24 determines that the long-term event specified by the specific unit 22 is abnormal.
[0050]
For example, it is assumed that the detection condition of the long-term event specified by the specific unit 22 is that the long-term event is detected more than a predetermined number of times in the period corresponding to the type of the long-term event. In this case, the determination unit 24 is the same long-term event as the long-term event specified by the specific unit 22 and the long-term event that occurred at or around the same occurrence position in the period according to the type of the long-term event. The number of occurrences and the number of occurrences of long-term events including the same occurrence position in the movement locus are counted, and if the number of counts is a predetermined number or more, it is determined that the detection condition is satisfied.
[0051]
The conditions for detecting long-term events are not limited to those described above. For example, the long-term event detection condition may be a condition using the vibration intensity of vibration in a period corresponding to the type of long-term event. More specifically, in a period according to the type of long-term event, the vibration intensity is derived based on the vibration content when the long-term event occurs, and the number of times the vibration intensity exceeds the threshold is the predetermined number of times or more. A long-term event detection condition is that there is, or that the time when the vibration intensity exceeds the threshold is a predetermined time or longer.May be.
[0052]
Further, since the long-term event has a long period according to the type of the long-term event, the amount of history information extracted from the storage unit 25 is also enormous. Therefore, the determination unit 24 may compress the history information extracted from the storage unit 25 and determine whether or not the detection condition is satisfied based on the compressed history information. For example, when the period according to the type of long-term event is one month, the determination unit 24 determines the vibration intensity over one month as the average value, the maximum value, and the minimum value per unit time (for example, one minute). , Median value, deviation, etc. may be used to compress the history information. Then, the number of times that the vibration intensity obtained by compressing the history information exceeds the threshold number is a predetermined number of times or more, or the time that the vibration intensity becomes a predetermined time or more is a predetermined time or more, etc. for a long period of time. It may be used as an event detection condition.
[0053]
The method of determining whether or not a medium-term event is abnormal is the same as the method of determining a long-term event. In addition, other examples of detection conditions for medium-term events are the same as other examples of detection conditions for long-term events.
[0054]
Further, the detection conditions for medium-term events and long-term events may be set individually for each event. For example, in the case of the above-mentioned event (7) "a person excavates a tunnel around fence F", if the tunnel is a tunnel that straddles a boundary such as a border, from a position away from the boundary toward the boundary. We will be excavating a tunnel. Therefore, it is considered that the vibration intensity gradually increases near the boundary. Therefore, with respect to the above-mentioned event (7), the detection condition may be that the vibration intensity gradually increases during the period corresponding to the above-mentioned event (7).
[0055]
Subsequently, in the following, an example of a GUI screen to be displayed on the display unit 30 when the determination unit 24 determines that the event specified by the specific unit 22 in the notification unit 26 is abnormal will be described. Here, as shown in FIG. 5, the storage unit 25 represents a correspondence relationship between a position on the optical fiber 10 (distance from the optical fiber sensing device 20) and a region corresponding to the position. The correspondence table is stored, and the identification unit 22 uses this correspondence table to specify the occurrence position of the event as the occurrence area. As will be described later, when the monitoring area is also monitored by a camera, the above-mentioned area may be set according to the shooting range of the camera. That is, the above-mentioned area may be set for each shooting range of the camera.
[0056]
In the example of FIG. 6, the notification unit 26 superimposes the laying position of the optical fiber 10 and the installation position of the optical fiber sensing device 20 on the map of the monitoring area and displays them on the display unit 30.
Further, the notification unit 26 displays the sensing data indicating the vibration pattern included in the return light on the display unit 30. This sensing data is the same as in FIG. 2, and is generated by the specific unit 22. Further, in the example of FIG. 6, the user can specify the range of the sensing data. In the example of FIG. 6, the user specifies the sensing data in the range of the distance from the optical fiber sensing device 20 from 0.5 km to 80 km, and the notification unit 26 specifies the sensing data specified by the user. It is acquired from 22 and displayed on the display unit 30.
[0057]
Further, the notification unit 26 displays a list of events specified by the specific unit 22 on the display unit 30. In the example of FIG. 6, the notification unit 26 has, as event items, a group (term) in which the event is classified, an event type (Alert type), an event occurrence region (Region), and an event occurrence time (Time stamp). , The number of occurrences of the event (count), and whether or not the event corresponds to an abnormality (alert) are displayed. However, the items displayed on the display unit 30 are not limited to this example. The item to be displayed on the display unit 30 may include at least information on the time when the event occurred, the position where the event occurred, the type, and whether or not the abnormality occurred.
[0058]
In the example of FIG. 7, the notification unit 26 summarizes the events in the part of the list of events displayed in FIG. 6 and displays them on the display unit 30. Specifically, in the example of FIG. 7, the notification unit 26 summarizes the events having the same type and occurrence area and displays them on the display unit 30. However, since the method of summarizing the events is a design matter, it is not limited to this example. Further, in the example of FIG. 7, the notification unit 26 displays a group (term) in which the event is classified, an event type (Alert type), and an event occurrence region (Region) as event items.
[0059]
In the example of FIG. 8, the notification unit 26 adds an item to the part of the list of events displayed in FIG. 7. Specifically, in the example of FIG. 8, the notification unit 26 adds the event occurrence period (Time stamp) and the event occurrence count (count). However, the items to be additionally displayed on the display unit 30 are not limited to this example.
[0060]
FIG. 9 is an example of a GUI screen displayed by transitioning to another page when the detection result of tunnel digging on the GUI screen of FIG. 7 or 8 is clicked.
In the example of FIG. 9, the notification unit 26 displays a graph showing the change in the maximum value of the vibration intensity when the above-mentioned event (7) "a person excavates a tunnel around the fence F" occurs. It is displayed at 30. In the case of the above-mentioned event (7), if the tunnel crosses a boundary such as a border, the tunnel is excavated from a position away from the boundary toward the boundary, and after passing the boundary, the tunnel moves away from the boundary. As you can see, the tunnel will be excavated. In the example of FIG. 9, this phenomenon is represented by the vibration intensity, and the vibration intensity gradually increases, and after reaching the peak, the vibration intensity gradually decreases. Further, as described above, the specific unit 22 can specify the direction in which the event has occurred. Therefore, by combining with the direction in which the event occurs in the specific unit 22, the tunnel is excavated from either side of the boundary. You can also identify if you are there. In the example of FIG. 9, the position where the vibration intensity peaks is considered to be the position where the person excavating the tunnel is closest to the optical fiber 10. In the example of FIG. 9, a graph showing a change in the maximum value of vibration intensity is displayed, but the graph is not limited to this. The notification unit 26 may display a graph showing a change in one of the maximum value, the minimum value, the average value, and the median value of the vibration intensity.
[0061]
In the example of FIG. 10, the notification unit 26 shows the change in the maximum value of the vibration intensity displayed in FIG. 9, and the display unit 30 displays a graph showing the change in the average value of the vibration intensity. However, the present invention is not limited to this example. The notification unit 26 may display a graph showing changes in two or more of the maximum value, the minimum value, the average value, and the median value of the vibration intensity.
[0062]
For example, in the case of the event that there is a generator, there is a high possibility that continuous vibration will occur constantly, so it is possible to grasp the state of the generator by checking the average value of the vibration intensity. On the other hand, in the case of the event of tunnel excavation, it is expected that the vibration intensity will gradually increase, and the progress of tunnel excavation can be confirmed by confirming the change in the maximum value of the vibration intensity. As described above, since the value at which the characteristic of the event appears differs depending on the event, it is more effective to display a graph showing two or more changes.
[0063]
FIG. 11 is an example of a GUI screen that is displayed by transitioning to another page when the detection result of the existing tunnel on the GUI screen of FIG. 7 or 8 is clicked.
In the example of FIG. 11, the notification unit 26 displays on the display unit 30 a graph showing the number of occurrences of the event “a person or the like moves in the tunnel around the fence F” described in (8) above every month. ing. In the example of FIG. 10, the unit period is monthly, but the unit period is not limited to this. For example, the unit period may be weekly, daily, or the like.
[0064]
FIG. 12 is an example of a GUI screen that is displayed by transitioning from the GUI screen when the detection result of tunnel digging on the GUI screen of FIG. 8 is clicked.
In the example of FIG. 12, the notification unit 26 has a history P of the occurrence position based on the position change of the occurrence position when the event "a person excavates a tunnel around the fence F" described in (7) above occurs. Is superimposed on the map of the monitoring area and displayed on the display unit 30.
[0065]
It should be noted that FIGS. 9 to 12 show the above-mentioned event (7) "a person excavates a tunnel around the fence F" and (8) "a person or the like moves in the tunnel around the fence F". It was a display example of the GUI screen when the above occurred. However, this display example is not limited to the above-mentioned event (7) or (8), and when the same event is specified over a predetermined period, that is, when a medium-term event or a long-term event is specified. , It is possible to apply.
[0066]
Subsequently, with reference to FIG. 13, an example of the overall operation flow of the optical fiber sensing system according to the second embodiment will be described.
[0067]
As shown in FIG. 13, the receiving unit 21 receives the return light from the optical fiber 10 laid on the fence F (step S21), and the specific unit 22 receives the vibration included in the return light received by the receiving unit 21. Based on the pattern, the occurrence of an event in and around the fence F and the type of the event that has occurred are specified (step S22). At this time, the specifying unit 22 also specifies the position where the event occurred.
[0068]
Subsequently, the acquisition unit 23 and the determination unit 24 determine whether or not the event specified by the specific unit 22 is a short-term event (step S23).
In step S23, when the event specified by the specific unit 22 is not a short-term event (No in step S23), the acquisition unit 23 acquires the detection condition regarding the period according to the type of the event specified by the specific unit 22 (step). S24), the determination unit 24 determines whether or not the detection condition acquired by the acquisition unit 23 is satisfied (step S25).
[0069]
If the detection condition is satisfied in step S25 (Yes in step S25), the determination unit 24 determines that the event specified by the specific unit 22 is abnormal (step S27). Subsequently, the storage unit 25 stores information such as the time of occurrence of the event specified by the specific unit 22, the occurrence position, the type, the ID, the vibration content, and whether or not the abnormality is present (here, it corresponds to the abnormality) as history information. The notification unit 26 displays on the display unit 30 that an abnormality has occurred, for example, on the GUI screens shown in FIGS. 6 to 12 (step S28).
[0070]
If the detection condition is not satisfied in step S25 (No in step S25), the storage unit 25 determines the occurrence time, occurrence position, type, ID, vibration content, and abnormality (here) of the event specified by the specific unit 22. Then, information such as (which does not correspond to an abnormality) is stored as history information (step S26), and the process returns to step S21.
[0071]
On the other hand, in step S23, when the event specified by the specific unit 22 is a short-term event (Yes in step S23), the determination unit 24 determines that the event specified by the specific unit 22 is abnormal regardless of the search conditions. After making a determination (step S27), the process of step S28 described above is performed thereafter.
[0072]
As described above, according to the second embodiment, the storage unit 25 stores information such as the occurrence time, the occurrence position, the type, the vibration content, and the presence / absence of the abnormality of the event specified by the specific unit 22 as history information. .. When the event specified by the specific unit 22 is a medium-term event or a long-term event, the determination unit 24 extracts history information about the event specified by the specific unit 22 from the storage unit 25, and based on the extracted history information. , It is determined whether or not the detection condition is satisfied, and if the detection condition is satisfied, it is determined that the event specified by the specific unit 22 is abnormal.
[0073]
That is, according to the second embodiment, whether or not the detection condition is satisfied based on the history information about the event specified by the specific unit 22 by storing the information of the event specified by the specific unit 22 as the history information. To judge. Therefore, it is possible to easily determine whether or not the detection condition is satisfied. Other effects are the same as those in the first embodiment described above.
[0074]

In the above-described embodiment, the monitoring area has been described as being the fence F and the surrounding area, but the present invention is not limited to this. For example, the monitoring area may be an area where the pipeline is arranged, deterioration of the pipeline may be detected as a long-term event, and destruction or rupture of the pipeline may be detected as a short-term event. Alternatively, the monitoring area may be an area along a road or a railroad track, and deterioration of the road or railroad track may be detected as a long-term event, and rockfall on the road or railroad track may be detected as a short-term event.
[0075]
Further, in the above-described embodiment, an example of monitoring the monitoring area with one optical fiber sensing device 20 has been described, but the present invention is not limited to this. The monitoring area may be divided into a plurality of areas, a plurality of optical fiber sensing devices 20 may be provided corresponding to each of the plurality of areas, and the areas corresponding to each of the plurality of optical fiber sensing devices 20 may be monitored. In this case, the ID or the like of the optical fiber sensing device 20 that identifies the event may be displayed in the list of events on the GUI screen as shown in FIG.
[0076]
Further, in the above-described embodiment, an example of monitoring the monitoring area with the optical fiber sensing device 20 has been described, but the present invention is not limited to this. One or more cameras may be provided in the monitoring area, and the monitoring area may be monitored by the optical fiber sensing device 20 and the camera by taking a picture of the event specified by the specific unit 22 with any of the cameras. In this case, the ID of the camera that captures the event may be displayed in the list of events on the GUI screen as shown in FIG.
[0077]
Further, in the above-described embodiment, the optical fiber sensing device 20 is provided with a plurality of components (reception unit 21, specific unit 22, acquisition unit 23, determination unit 24, storage unit 25, and notification unit 26). However, it is not limited to this. The components provided in the optical fiber sensing device 20 are not limited to being provided in one device, and may be distributed in a plurality of devices.
[0078]

Subsequently, with reference to FIG. 14, the hardware configuration of the computer 40 that realizes the optical fiber sensing device 20 will be described below.
[0079]
As shown in FIG. 14, the computer 40 includes a processor 401, a memory 402, a storage 403, an input / output interface (input / output I / F) 404, a communication interface (communication I / F) 405, and the like. The processor 401, memory 402, storage 403, input / output interface 404, and communication interface 405 are connected by a data transmission path for transmitting and receiving data to and from each other.
[0080] [0080]
The processor 401 is, for example, an arithmetic processing device such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). The memory 402 is, for example, a memory such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The storage 403 is, for example, a storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a memory card. Further, the storage 403 may be a memory such as a RAM or a ROM.
[0081]
The storage 403 stores a program that realizes the functions of the components (reception unit 21, specific unit 22, acquisition unit 23, determination unit 24, storage unit 25, and notification unit 26) included in the optical fiber sensing device 20. .. By executing each of these programs, the processor 401 realizes the functions of the components included in the optical fiber sensing device 20. Here, when the processor 401 executes each of the above programs, these programs may be read on the memory 402 and then executed, or may be executed without being read on the memory 402. In addition to the role of the storage unit 25, the memory 402 and the storage 403 also play a role of storing information and data held by other components included in the optical fiber sensing device 20.
[0082]
Further, the above-mentioned program is stored using various types of non-transitory computer readable medium and can be supplied to a computer (including the computer 40). Non-temporary computer-readable media include various types of tangible storage media. Examples of non-temporary computer readable media include magnetic recording media (eg, flexible discs, magnetic tapes, hard disk drives), optomagnetic recording media (eg, optomagnetic discs), CD-ROMs (Compact Disc-ROMs), CDs. -R (CD-Recordable), CD-R / W (CD-ReWritable), semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM. , Various types of transient computer readable medium may be supplied to the computer. Examples of transient computer readable media include electrical, optical, and electromagnetic waves. The computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
[0083]
The input / output interface 404 is connected to a display device 4041, an input device 4042, a sound output device 4043, and the like. The display device 4041 is a device that displays a screen corresponding to drawing data processed by the processor 401, such as an LCD (Liquid Crystal Display), a CRT (Cathode Ray Tube) display, and a monitor. The input device 4042 is a device that receives an operator's operation input, and is, for example, a keyboard, a mouse, a touch sensor, and the like. The display device 4041 and the input device 4042 may be integrated and realized as a touch panel. The sound output device 4043 is a device such as a speaker that acoustically outputs sound corresponding to acoustic data processed by the processor 401.
[0084]
The communication interface 405 sends and receives data to and from an external device. For example, the communication interface 405 communicates with an external device via a wired communication path or a wireless communication path.
[0085]
Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. The structure and details of the present disclosure may be modified in various ways within the scope of the present disclosure as may be understood by those skilled in the art.
For example, the above-described embodiment may be used in combination in part or in whole.
[0086]
Further, a part or all of the above embodiments may be described as in the following appendix, but the present invention is not limited to the following.
(Appendix 1)
A receiver that receives an optical signal from a sensing optical fiber,
A specific part that specifies the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal,
The acquisition unit that acquires the detection conditions related to the period according to the type of event specified by the specific unit, and the acquisition unit.
When the detection condition is satisfied, a judgment unit for determining that the event specified by the specific unit is abnormal is provided.
Optical fiber sensing system.
(Appendix 2)
Further equipped with a storage unit that stores information including at least the type of event specified by the specific unit, the time of occurrence, the position of occurrence, the content of vibration, and whether or not the abnormality is present as history information.
When the specific unit identifies an event, the determination unit extracts history information related to the event specified by the specific unit from the storage unit, and whether or not the detection condition is satisfied based on the extracted history information. To judge
The optical fiber sensing system described in Appendix 1.
(Appendix 3)
The determination unit compresses the history information extracted from the storage unit, and determines whether or not the detection condition is satisfied based on the compressed history information.
The optical fiber sensing system described in Appendix 2.
(Appendix 4)
The event includes at least the first event and the second event.
The detection condition of the first event is the detection condition related to the first period.
The detection condition of the second event is a detection condition related to a second period different from the first period.
The optical fiber sensing system according to Appendix 2 or 3.
(Appendix 5)
Display part and
Further provided is a notification unit that displays on the display unit that an abnormality has occurred when the determination unit determines that the event specified by the specific unit is abnormal.
The optical fiber sensing system according to any one of Supplementary note 2 to 4.
(Appendix 6)
The notification unit displays on the display unit the type of event specified by the specific unit, the time of occurrence, the position of occurrence, and the presence or absence of an abnormality.
The optical fiber sensing system described in Appendix 5.
(Appendix 7)
When the specific unit identifies the same event over a predetermined period, the notification unit has at least one of the maximum, minimum, average, and median values ​​of the vibration intensity when the event specified by the specific unit occurs. A graph showing one change is displayed on the display unit.
The optical fiber sensing system described in Appendix 5.
(Appendix 8)
When the specific unit identifies the same event over a predetermined period, the notification unit has two of the maximum value, the minimum value, the average value, and the median value of the vibration intensity when the event specified by the specific unit occurs. A graph showing one or more changes is displayed on the display unit.
The optical fiber sensing system described in Appendix 5.
(Appendix 9)
When the specific unit identifies the same event over a predetermined period, the notification unit displays a graph showing the number of occurrences of the event specified by the specific unit for each unit period on the display unit.
The optical fiber sensing system described in Appendix 5.
(Appendix 10)
When the specific unit identifies the same event over a predetermined period, the notification unit superimposes the history of the occurrence position of the event specified by the specific unit on the map and displays it on the display unit.
The optical fiber sensing system described in Appendix 5.
(Appendix 11)
It is a monitoring method using an optical fiber sensing system.
The reception step of receiving an optical signal from the sensing optical fiber,
A specific step to specify the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal,
The acquisition step to acquire the detection conditions related to the period according to the type of the event specified in the specific step, and the acquisition step.
If the detection condition is satisfied, the determination step of determining that the event specified in the specific step is abnormal is included.
Monitoring method.
(Appendix 12)
Further provided with a storage step for storing information including at least the type of event specified in the specific step, the time of occurrence, the position of occurrence, the content of vibration, and the presence or absence of an abnormality in the storage unit as history information.
In the determination step, when an event is specified in the specific step, history information related to the event specified in the specific step is extracted from the storage unit, and whether or not the detection condition is satisfied based on the extracted history information. To judge
The monitoring method described in Appendix 11.
(Appendix 13)
In the determination step, the history information extracted from the storage unit is compressed, and based on the compressed history information, it is determined whether or not the detection condition is satisfied.
The monitoring method described in Appendix 12.
(Appendix 14)
The event includes at least the first event and the second event.
The detection condition of the first event is the detection condition related to the first period.
The detection condition of the second event is a detection condition related to a second period different from the first period.
The monitoring method described in Appendix 12 or 13.
(Appendix 15)
When the event specified in the specific step is judged to be abnormal in the judgment step In that case, a notification step for displaying the occurrence of an abnormality on the display unit is further included.
The monitoring method according to any one of the appendices 12 to 14.
(Appendix 16)
In the notification step, the type of event specified in the specific step, the time of occurrence, the position of occurrence, and the presence or absence of an abnormality are displayed on the display unit.
The monitoring method described in Appendix 15.
(Appendix 17)
In the notification step, when the same event is specified over a predetermined period in the specific step, at least of the maximum value, the minimum value, the average value, and the median value of the vibration intensity when the event specified in the specific step occurs. A graph showing one change is displayed on the display unit.
The monitoring method described in Appendix 15.
(Appendix 18)
In the notification step, when the same event is specified over a predetermined period in the specific step, two of the maximum value, the minimum value, the average value, and the median value of the vibration intensity when the event specified in the specific step occurs. A graph showing one or more changes is displayed on the display unit.
The monitoring method described in Appendix 15.
(Appendix 19)
In the notification step, when the same event is specified over a predetermined period in the specific step, a graph showing the number of occurrences of the event specified in the specific step for each unit period is displayed on the display unit.
The monitoring method described in Appendix 15.
(Appendix 20)
In the notification step, when the same event is specified over a predetermined period in the specific step, the history of the occurrence position of the event specified in the specific step is superimposed on the map and displayed on the display unit.
The monitoring method described in Appendix 15.
(Appendix 21)
On the computer
Reception procedure for receiving optical signals from sensing optical fiber,
A specific procedure for identifying the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal, and
The acquisition procedure for acquiring the detection conditions for the period according to the type of event specified in the specific procedure, and the acquisition procedure.
If the detection conditions are met, the judgment procedure for determining that the event specified by the specific procedure is abnormal, and the judgment procedure.
A non-temporary computer-readable medium that stores a program for executing.
(Appendix 22)
The program further executes a storage procedure in which the computer stores information including at least the type of event, the time of occurrence, the position of occurrence, the content of vibration, and the presence or absence of an abnormality in the storage unit as history information. Let me
In the determination procedure, when an event is specified by the specific procedure, history information related to the event specified by the specific procedure is extracted from the storage unit, and whether or not the detection condition is satisfied based on the extracted history information. To judge
The non-temporary computer-readable medium described in Appendix 21.
(Appendix 23)
In the determination procedure, the history information extracted from the storage unit is compressed, and based on the compressed history information, it is determined whether or not the detection condition is satisfied.
The non-temporary computer-readable medium described in Appendix 22.
(Appendix 24)
The event includes at least the first event and the second event.
The detection condition of the first event is the detection condition related to the first period.
The detection condition of the second event is a detection condition related to a second period different from the first period.
The non-temporary computer-readable medium described in Appendix 22 or 23.
(Appendix 25)
The program causes the computer to further execute a notification procedure for displaying on the display unit that an abnormality has occurred when the event specified by the specific procedure is determined to be abnormal by the determination procedure.
The non-temporary computer-readable medium according to any one of the appendices 22 to 24.
(Appendix 26)
In the notification procedure, the type of event specified in the specific procedure, the time of occurrence, the position of occurrence, and the presence or absence of an abnormality are displayed on the display unit.
Non-temporary computer-readable medium described in Appendix 25.
(Appendix 27)
In the notification procedure, when the same event is specified over a predetermined period in the specific procedure, at least of the maximum value, the minimum value, the average value, and the median value of the vibration intensity when the event specified in the specific procedure occurs. A graph showing one change is displayed on the display unit.
Non-temporary computer-readable medium described in Appendix 25.
(Appendix 28)
In the notification procedure, when the same event is specified over a predetermined period in the specific procedure, two of the maximum value, the minimum value, the average value, and the median value of the vibration intensity when the event specified in the specific procedure occurs. A graph showing one or more changes is displayed on the display unit.
Non-temporary computer-readable medium described in Appendix 25.
(Appendix 29)
In the notification procedure, when the same event is specified over a predetermined period in the specific procedure, a graph showing the number of occurrences of the event specified in the specific procedure for each unit period is displayed on the display unit.
Non-temporary computer-readable medium described in Appendix 25.
(Appendix 30)
In the notification procedure, when the same event is specified over a predetermined period in the specific procedure, the history of the occurrence position of the event specified in the specific procedure is superimposed on the map and displayed on the display unit.
Non-temporary computer-readable medium described in Appendix 25.
Description of the sign
[0087]
10 Optical fiber
20 Optical fiber sensing equipment
21 Receiver
22 Specific part
23 Acquisition department
24 Judgment department
25 storage unit
26 Notification unit
30 display unit
40 computer
401 processor
402 Memory
403 storage
404 I / O interface
4041 display device
4042 input device
4043 sound output device
405 communication interface
F fence
History of the occurrence position of P event
The scope of the claims
[Claim 1]
A receiver that receives an optical signal from a sensing optical fiber,
A specific part that specifies the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal,
The acquisition unit that acquires the detection conditions related to the period according to the type of event specified by the specific unit, and the acquisition unit.
When the detection condition is satisfied, a judgment unit for determining that the event specified by the specific unit is abnormal is provided.
Optical fiber sensing system.
[Claim 2]
Further equipped with a storage unit that stores information including at least the type of event specified by the specific unit, the time of occurrence, the position of occurrence, the content of vibration, and whether or not the abnormality is present as history information.
When the specific unit identifies an event, the determination unit extracts history information related to the event specified by the specific unit from the storage unit, and whether or not the detection condition is satisfied based on the extracted history information. To judge
The optical fiber sensing system according to claim 1.
[Claim 3]
The determination unit compresses the history information extracted from the storage unit, and determines whether or not the detection condition is satisfied based on the compressed history information.
The optical fiber sensing system according to claim 2.
[Claim 4]
The event includes at least the first event and the second event.
The detection condition of the first event is the detection condition related to the first period.
The detection condition of the second event is a detection condition related to a second period different from the first period.
The optical fiber sensing system according to claim 2 or 3.
[Claim 5]
Display part and
Further provided is a notification unit that displays on the display unit that an abnormality has occurred when the determination unit determines that the event specified by the specific unit is abnormal.
The optical fiber sensing system according to any one of claims 2 to 4.
[Claim 6]
When the specific unit identifies the same event over a predetermined period, the notification unit has at least one of the maximum, minimum, average, and median values ​​of the vibration intensity when the event specified by the specific unit occurs. A graph showing one change is displayed on the display unit.
The optical fiber sensing system according to claim 5.
[Claim 7]
It is a monitoring method using an optical fiber sensing system.
The reception step of receiving an optical signal from the sensing optical fiber,
A specific step to specify the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal,
The acquisition step to acquire the detection conditions related to the period according to the type of the event specified in the specific step, and the acquisition step.
If the detection condition is satisfied, the determination step of determining that the event specified in the specific step is abnormal is included.
Monitoring method.
[Claim 8]
Further provided with a storage step for storing information including at least the type of event specified in the specific step, the time of occurrence, the position of occurrence, the content of vibration, and the presence or absence of an abnormality in the storage unit as history information.
In the determination step, when an event is specified in the specific step, history information related to the event specified in the specific step is extracted from the storage unit, and whether or not the detection condition is satisfied based on the extracted history information. To judge
The monitoring method according to claim 7.
[Claim 9]
In the determination step, the history information extracted from the storage unit is compressed, and based on the compressed history information, it is determined whether or not the detection condition is satisfied.
The monitoring method according to claim 8.
[Claim 10]
The event includes at least the first event and the second event.
The detection condition of the first event is the detection condition related to the first period.
The detection condition of the second event is a detection condition related to a second period different from the first period.
The monitoring method according to claim 8 or 9.
[Claim 11]
When the event specified in the specific step is determined to be abnormal in the determination step, the notification step for displaying the occurrence of the abnormality on the display unit is further included.
The monitoring method according to any one of claims 8 to 10.
[Claim 12]
In the notification step, when the same event is specified over a predetermined period in the specific step, at least of the maximum value, the minimum value, the average value, and the median value of the vibration intensity when the event specified in the specific step occurs. A graph showing one change is displayed on the display unit.
The monitoring method according to claim 11.
[Claim 13]
On the computer
Reception procedure for receiving optical signals from sensing optical fiber,
A specific procedure for identifying the occurrence of an event and the type of the event that occurred based on the vibration pattern included in the optical signal, and
The acquisition procedure for acquiring the detection conditions for the period according to the type of event specified in the specific procedure, and the acquisition procedure.
If the detection conditions are met, the judgment procedure for determining that the event specified by the specific procedure is abnormal, and the judgment procedure.
A non-temporary computer-readable medium that stores a program for executing.
[Claim 14]
Further provided with a storage procedure for storing information including at least the type of event, the time of occurrence, the position of occurrence, the content of vibration, and the presence or absence of an abnormality as history information in the storage unit specified in the specific procedure.
In the determination procedure, when an event is specified by the specific procedure, history information related to the event specified by the specific procedure is extracted from the storage unit, and whether or not the detection condition is satisfied based on the extracted history information. To judge
The non-temporary computer-readable medium according to claim 13.
[Claim 15]
In the determination procedure, the history information extracted from the storage unit is compressed, and based on the compressed history information, it is determined whether or not the detection condition is satisfied.
The non-temporary computer-readable medium according to claim 14.