Title of the invention: monitoring system, monitoring device, monitoring method, and computer-readable medium
Technical field
[0001]
　The present disclosure relates to monitoring systems, monitoring devices, monitoring methods, and computer-readable media.
Background technology
[0002]
　Conventionally, abnormality detection of a monitoring target such as a fence is often performed by a monitor in a monitoring room monitoring camera images of a plurality of cameras. For example, when the observer determines that there is a suspicious point in the monitored object, the observer detects an abnormality in the monitored object by pointing the direction of the camera toward the monitored object and zooming in. However, when the abnormality of the monitored object is detected by human hands, it takes a lot of cost and time, and the detection and countermeasure of the abnormality may be delayed.
　Therefore, recently, a system for monitoring an abnormality to be monitored by using an optical fiber has been proposed (for example, Patent Documents 1 to 3).
[0003]
　In the techniques described in Patent Documents 1 and 2, an FBG (Fiber Bragg Grating) optical fiber is laid on the fence, and an OTDR (Optical Time-Domain Reflectometry) optical fiber is laid on the fence to overcome the fence. An intruder trying to break is detected by an FBG type intrusion detector, and an intruder trying to destroy a fence is detected by an OTDR type intrusion detector. Further, the ITV (Industrial Television) monitoring system provided in the monitoring room directs the shooting direction of the ITV camera to the detection position based on the detection position information included in the intrusion detection signal from the intrusion detector.
[0004]
　In the technique described in Patent Document 3, a plurality of FBG optical fibers are laid on a fence, and a pulse signal is output when the reflected wave shift amount of the reflected wave generated by the optical fiber exceeds a certain threshold value. I will do it. In addition, the events that occur in the fence are classified according to the frequency and fluctuation amount of the fence, and the events that occur in the fence and the pulse signal generation time delay and occurrence frequency in each of the multiple optical fibers are dealt with. Prepare a table that has been made to work. Then, the event occurring in the fence is detected by comparing the generation time delay and the generation frequency of the pulse signal in each of the plurality of optical fibers with the above-mentioned table.
Prior art literature
Patent documents
[0005]
Patent Document 1: Japanese Patent Application Laid-Open No. 2005-032224
Patent Document 2: Japanese Patent Application Laid-Open No. 2006-172339
Patent Document 3: Japanese Patent Application Laid-Open No. 2006-208061
Outline of the invention
Problems to be solved by the invention
[0006]
　However, in the techniques described in Patent Documents 1 to 3, there is a problem that it is necessary to use a special optical fiber called an FBG type optical fiber. Further, in the techniques described in Patent Documents 1 and 2, there is a problem that it is necessary to use an OTDR type optical fiber together with an FBG type optical fiber. Further, in the technique described in Patent Document 3, there is a problem that it is necessary to lay a plurality of optical fibers and receive reflected waves from the plurality of optical fibers.
[0007]
　Therefore, an object of the present disclosure is a monitoring system, a monitoring device, a monitoring method, which can solve the above-mentioned problems and detect the state of the monitoring target without using a special structure for detecting the state of the monitoring target. And to provide computer readable media.
Means to solve problems
[0008]
　The monitoring system according to one aspect 　receives an optical signal including a pattern according to the state to be monitored from a cable
　including an optical fiber and at least one optical fiber included in the cable, and the pattern is received from the received optical signal.
It is provided with a receiving unit for detecting the
　above and a control unit for detecting the state of the monitored object based on the pattern
　.
[0009]
　The monitoring device according to one embodiment has
　a receiving unit that receives an optical signal including a pattern according to a state to be monitored from at least one optical fiber included in the cable and detects the pattern from the received optical signal
　. A control unit for detecting the state of the monitored object based on the pattern
　is provided.
[0010]
　The monitoring method according to one aspect is a monitoring method using a
　monitoring device, in which
　an optical signal including a pattern according to a state to be monitored is received from at least one optical fiber included in the cable, and the received optical signal is used as described above. A pattern is detected, and
　the state of the monitored object is detected based on the pattern.
[0011]
　The non-temporary computer-readable medium according to one aspect 　receives an optical signal including a pattern according to the state to be monitored from at least one optical fiber included
　in the cable to the computer, and the pattern from the received optical signal. A program for executing a procedure for detecting the state of the monitoring target and a
procedure
　for detecting the state of the monitoring target based on the pattern
　are stored.
The invention's effect
[0012]
　According to the above aspect, it is possible to solve the above-mentioned problems and detect the state of the monitored object without using a special structure for detecting the state of the monitored object.
A brief description of the drawing
[0013]
[Fig. 1] Fig. 1 is a diagram showing an example of a configuration of a monitoring system according to an embodiment.
[Fig. 2] Fig. 2 is a diagram showing an example of fence position information according to an embodiment.
FIG. 3 is a diagram showing an example of vibration data generated by the optical fiber detection unit according to the embodiment.
[Fig. 4] Fig. 4 is a diagram showing an example of machine learning by a control unit according to an embodiment.
[Fig. 5] Fig. 5 is a diagram showing an example of fence event information according to an embodiment.
[Fig. 6] Fig. 6 is a diagram showing an example of a configuration of a monitoring system according to a modified example of the embodiment.
FIG. 7 is a diagram showing an example of camera information according to an embodiment.
FIG. 8 is a diagram showing another example of the configuration of the monitoring system according to the modified example of the embodiment.
[Fig. 9] Fig. 9 is a block diagram showing an example of a hardware configuration of a computer that realizes a monitoring device according to an embodiment.
[Fig. 10] Fig. 10 is a flow chart showing an example of an operation flow of a monitoring system according to an embodiment.
Embodiment for carrying out the invention
[0014]
　Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the embodiment described below, as an example, the monitoring target to be monitored is assumed to be a fence, but the monitoring target is not limited to the fence.
[0015]

　First, the configuration of the monitoring system according to this embodiment will be described with reference to FIG. 1.
　As shown in FIG. 1, the monitoring system according to the present embodiment monitors the fence 10 and its surroundings, and includes an optical fiber cable 20, a monitoring device 30, and a camera 40. Further, the monitoring device 30 includes an optical fiber detection unit 31 and a control unit 32. The fence 10 may be composed of one fence 10, but in the present embodiment, it is assumed that a plurality of fences 10 are connected to each other. Further, the optical fiber detection unit 31 is an example of a receiving unit.
[0016]
　The optical fiber cable 20 is a cable configured by covering one or more optical fibers, and is laid on the fence 10 and buried in the ground along the fence 10. Specifically, the optical fiber cable 20 extends from the optical fiber detection unit 31 along the fence 10, is folded back at a folding point, and returns to the optical fiber detection unit 31. Of these, one between the optical fiber detection unit 31 and the turning point is laid on the fence 10, and the other is buried in the ground along the fence 10. However, the method of laying / burying the optical fiber cable 20 shown in FIG. 1 is an example and is not limited thereto.
[0017]
　The camera 40 is a camera that captures an area in which the fence 10 is installed, and is realized by, for example, a fixed camera, a PTZ (Pan Tilt Zoom) camera, or the like.
[0018]
　The monitoring system according to the present embodiment monitors the fence 10 and its surroundings by using an optical fiber sensing technique using an optical fiber as a sensor.
　Specifically, the optical fiber detection unit 31 incidents pulsed light on at least one optical fiber included in the optical fiber cable 20. Then, as the pulsed light is transmitted through the optical fiber in the direction of the fence 10, backscattered light is generated for each transmission distance. This backscattered light returns to the optical fiber detection unit 31 via the same optical fiber.
[0019]
　At this time, the optical fiber detection unit 31 incidents the pulsed light in the clockwise direction, receives the backward scattered light with respect to the pulsed light from the clockwise direction, and incidents the pulsed light in the counterclockwise direction. , Receives backward scattered light for this pulsed light from the counterclockwise direction. Therefore, the optical fiber detection unit 31 receives backscattered light from two directions.
[0020]
　Here, the fence 10 vibrates when an event such as a person grasping and shaking the fence 10 occurs, and the vibration of the fence 10 is transmitted to the optical fiber. Further, the vibration pattern of the vibration of the fence 10 transmitted to the optical fiber is a dynamically fluctuating fluctuation pattern, and differs depending on the type of events occurring in the fence 10 and its surroundings. In the first embodiment, for example, the following events are assumed as predetermined events that occur in and around the fence 10.
(1) A person grabs and shakes the fence 10
(2) A person hits the fence 10
(3) A person climbs the fence 10
(4) A person hangs a ladder on the fence 10 and climbs the ladder.
(5) People and animals roam around the fence 10.
(6) People dig around fence 10
[0021]
　Therefore, the backscattered light received from the optical fiber by the optical fiber detection unit 31 has a pattern corresponding to the state of the fence 10 and its surroundings, that is, a pattern corresponding to the event occurring in the fence 10 and its surroundings. Is included. Therefore, in the present embodiment, the state of the fence 10 and its surroundings is detected by the method shown below by utilizing the fact that the pattern corresponding to the state of the fence 10 and its surroundings is included in the backscattered light. Specifically, it detects whether a predetermined event has occurred in and around the fence 10.
[0022]
　The optical fiber detection unit 31 determines the position of the fence 10 where the backscattered light is generated based on the time difference between the time when the pulsed light is incident on the optical fiber and the time when the backscattered light is received from the same optical fiber. Can be identified. Further, in the present embodiment, as described above, the fence 10 is configured by connecting a plurality of fences 10. Therefore, as shown in FIG. 2, the optical fiber detection unit 31 holds position information indicating the installation position (here, the distance from the optical fiber detection unit 31) and the installation area of ​​each of the plurality of fences 10. By setting the fence 10, the fence 10 in which the rearward scattered light is generated can be identified from the plurality of fences 10. Further, the optical fiber detection unit 31 can detect the vibration intensity of the specified fence 10 by detecting the received backscattered light with the distributed vibration sensor (Distributed Vibration Sensor).
[0023]
　Therefore, the optical fiber detection unit 31 can generate vibration data as shown in FIG. 3, for example, as sensing data. In FIG. 3, the horizontal axis indicates the position (distance from the optical fiber detection unit 31), and the vertical axis indicates the passage of time.
　In the example shown in FIG. 3, vibration is generated at a position about 400 m away from the optical fiber detection unit 31. The optical fiber detection unit 31 can define a dynamic unique pattern of this vibration by detecting the strength of the vibration, the vibration position, the transition of the fluctuation of the frequency, and the like. In addition, the optical fiber detection unit 31 detects a complex unique pattern of the fence 10 and its surroundings by also detecting a dynamic fluctuation pattern of sound and temperature, and further high-sensitivity and complicated operation and state. It becomes possible to detect.
[0024]
　Therefore, in the present embodiment, the control unit 32 performs machine learning (for example, deep learning) of the vibration pattern when a predetermined event occurs in and around the fence 10, and the learning result of machine learning (initial learning). A model) is used to detect whether a predetermined event has occurred in and around the fence 10.
[0025]
　First, a machine learning method will be described with reference to FIG.
　As shown in FIG. 4, a plurality of vibration patterns are prepared when a predetermined event occurs in and around the fence 10. The control unit 32 inputs a plurality of vibration patterns and teacher data which is fence event information indicating a predetermined event occurring in and around the fence 10 when the vibration patterns are used (steps S1 and S2). ). FIG. 5 shows an example of fence event information as teacher data. The fence event information is held by the control unit 32.
[0026]
　Subsequently, the control unit 32 performs matching and classification of the two (step S3), and performs supervised learning (step S4). As a result, an initial learning model is obtained (step S5). This initial learning model may be applicable if the event may correspond to any of the predetermined events when the vibration pattern corresponding to the event occurring in and around the fence 10 is input. It is a model that outputs a predetermined event. Alternatively, this initial learning model may be a model that outputs the confidence (confidence) in which the predeterm ined event occurs together with the predetermined event that may be applicable.
[0027]
　Subsequently, a method of detecting whether or not a predetermined event has occurred in and around the fence 10 will be described.
　In this case, the control unit 32 first acquires a vibration pattern corresponding to an event occurring in the fence 10 and its surroundings from the optical fiber detection unit 31. Subsequently, the control unit 32 inputs the vibration pattern to the initial learning model. As a result, the control unit 32 detects that a predetermined event has occurred because a predetermined event that may correspond to the output result of the initial learning model is obtained. Further, when the control unit 32 obtains the reliability together with the predetermined event that may correspond as the output result of the initial learning model, if the reliability is equal to or higher than the threshold value, the predetermined event occurs. You just have to detect that.
[0028]
　As described above, in the present embodiment, the vibration pattern when a predetermined event occurs in the fence 10 and its surroundings is machine-learned, and the learning result of the machine learning is used to generate in the fence 10 and its surroundings. Detects a predetermined event that is occurring.
　It may be difficult for human analysis to extract features for detecting events occurring in and around the fence 10 from the data. In the present embodiment, by constructing a learning model from a large number of patterns, a predetermined event occurring in and around the fence 10 can be detected with high accuracy even if it is difficult to analyze by humans. Can be done.
[0029]
　In the machine learning of the present embodiment, in the initial state, a learning model may be generated based on two or more teacher data. Further, the newly detected pattern may be newly learned in this learning model. At that time, detailed conditions for detecting predetermined events occurring in and around the fence 10 may be adjusted from the new learning model.
[0030]
　Further, as shown in FIG. 6, the monitoring system according to the present embodiment includes a plurality of cameras 40 (three cameras 40A to 40C in FIG. 6) and monitors the entire area where the fence 10 is installed. A display unit 50 installed in a monitoring room or the like may be provided. It should be noted that a plurality of cameras 40 may be installed so that the entire area where the fence 10 is installed can be photographed, and the number of installed cameras and the installation interval are not particularly limited. For example, when a high-performance camera 40 having a long maximum shooting distance is used, the number of installed cameras can be reduced and the installation interval can be lengthened.
[0031]
　As shown in FIG. 7, the control unit 32 holds camera information indicating the installation position (distance from the optical fiber detection unit 31) of each of the plurality of cameras 40, the imageable area, and the like. Further, the control unit 32 can acquire the position information of each of the plurality of fences 10 as shown in FIG. 2 from the optical fiber detection unit 31. Therefore, when the control unit 32 detects a predetermined event occurring in and around the fence 10 as described above, the control unit 32 is among the plurality of cameras 40 based on the above-mentioned camera information and the position information of the fence 10. , The camera 40 that captures the area including the fence 10 in which a predetermined event is detected is specified, and the specified camera 40 is controlled. For example, the control unit 32 controls the angle (azimuth angle, elevation angle) of the camera 40, the zoom magnification, and the like. Further, the control unit 32 may change the control of the camera 40 according to the pattern of the detected state. For example, the control unit 32 tracks more urgent movements (for example, digging around, overcoming, etc.) with a plurality of cameras 40, or zooms to identify a face or a person in more detail. The camera 40 may be controlled.
[0032]
　Further, the control unit 32 may control two or more cameras 40 that capture an area including the fence 10 in which a predetermined event is detected among the plurality of cameras 40. In this case, the functions may be divided for each camera 40. For example, at least one of the two or more cameras 40 captures the face of a person existing in the above area, and the captured face image is utilized for face authentication, and the two or more cameras 40. At least one of the cameras 40 may capture the entire area described above, and the captured image may be utilized for monitoring the behavior of people or animals existing in the area described above. Further, the two or more cameras 40 may shoot an area at different angles. Further, at least one camera 40 out of the two or more cameras 40 may perform shooting to complement the shooting o f another camera 40. For example, when the camera 40 has a blind spot in the above area that cannot be captured by another camera 40, the camera 40 may capture the blind spot. Further, when a dark area exists at night, the control unit 32 additionally controls a camera 40 with a night-vision function such as an infrared camera instead of the camera 40 for photographing the area, or controls the camera 40. You may switch to night vision mode. Further, the control unit 32 controls the spotlight 70 as shown in FIG. 8, for example, when a predetermined event is detected in an area to be photographed by the camera 40A, the light of the spotlight 70 is detected in that area. It may be controlled so as to hit.
[0033]
　Further, the control unit 32 is a camera 40 that captures an area including a sensing data image showing the sensing data generated by the optical fiber detection unit 31 and a fence 10 in which a predetermined event is detected based on the sensing data. The camera image or the like may be displayed on the display unit 50. However, there is no limitation on the displayed contents.
[0034]
　Subsequently, with reference to FIG. 9, the hardware configuration of the computer 60 that realizes the monitoring device 30 will be described below.
　As shown in FIG. 9, the computer 60 includes a processor 601, a memory 602, a storage 603, an input / output interface (input / output I / F) 604, a communication interface (communication I / F) 605, and the like. The processor 601, the memory 602, the storage 603, the input / output interface 604, and the communication interface 605 are connected by a data transmission line for transmitting and receiving data to and from each other.
[0035]
　The processor 601 is an arithmetic processing unit such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). The memory 602 is, for example, a memory such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The storage 603 is a storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a memory card. Further, the storage 603 may be a memory such as a RAM or a ROM.
[0036]
　The storage 603 stores a program that realizes the functions of the optical fiber detection unit 31 and the control unit 32 included in the monitoring device 30. The processor 601 realizes the functions of the optical fiber detection unit 31 and the control unit 32 by executing each of these programs. Here, when the processor 601 executes each of the above programs, these programs may be read on the memory 602 and then executed, or may be executed without being read on the memory 602. Further, the memory 602 and the storage 603 also play a role of storing information and data held by the optical fiber detection unit 31 and the control unit 32.
[0037]
　In addition, the above-mentioned programs can be stored using various types of non-transitory computer readable medium and supplied to a computer (including a computer 60). Non-temporary computer-readable media include various types of tangible storage media. Examples of non-temporary computer readable media are magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), optomagnetic recording media (eg, optomagnetic disks), CD-ROMs (Compact Disc-Read Only Memory). , CD-R (CD-Recordable), CD-R / W (CD-ReWritable), semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory) )including. The program may also be supplied to the computer by various types of transient computer readable medium. Examples of temporary computer readable media include electrical, optical, and electromagnetic waves. The temporary 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.
[0038]
　The input / output interface 604 is connected to a display device 6041, an input device 6042, and the like. The display device 6041 is a device such as an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube) display that displays a screen corresponding to drawing data processed by the processor 601. The input device 6042 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 6041 and the input device 6042 may be integrated and realized as a touch panel. The computer 60 may also include a sensor (not shown) including a distributed vibration sensor, and the sensor may be connected to the input / output interface 604. The display unit 50 may be connected to the input / output interface 604.
[0039]
　The communication interface 605 transmits / receives data to / from an external device. For example, the communication interface 605 communicates with an external device via a wired communication path or a wireless communication path.
[0040]

　Hereinafter, the operation of the monitor ing system according to the present embodiment will be described. Here, the operation flow of the monitoring system according to the present embodiment will be described with reference to FIG.
[0041]
　As shown in FIG. 10, first, the optical fiber detection unit 31 incidents pulsed light on at least one optical fiber included in the optical fiber cable 20 (step S11).
　Subsequently, the optical fiber detection unit 31 receives the backscattered light including the pattern according to the state of the fence 10 and its surroundings from the same optical fiber as the optical fiber incident with the pulsed light, and from the received backscattered light. , A pattern corresponding to the state of the fence 10 and its surroundings is detected (step S12). Specifically, a pattern corresponding to an event occurring in the fence 10 and its surroundings is detected. At this time, as described above, the optical fiber detection unit 31 detects the strength of the vibration, the vibration position, the transition of the fluctuation of the frequency, etc. generated by the event occurring in the fence 10 and its surroundings, and thereby the fence. Detects dynamic fluctuation patterns in and around 10. Alternatively, the optical fiber detection unit 31 may detect a complex unique pattern of the fence 10 and its surroundings by further detecting a dynamic fluctuation pattern of sound and temperature.
[0042]
　After that, the control unit 32 detects the state of the fence 10 and its surroundings based on the pattern detected by the optical fiber detection unit 31 (step S13). Specifically, it detects whether a predetermined event has occurred in and around the fence 10. At this time, the control unit 32 may detect whether or not a predetermined event has occurred in the fence 10 and its surroundings by the above-mentioned machine learning method.
[0043]

　As described above, according to the present embodiment, the backscattered light including the pattern according to the state of the fence 10 and its surroundings from at least one optical fiber included in the optical fiber cable 20 ( An optical signal) is received, a pattern is detected from the received backscattered light, and the state of the fence 10 and its surroundings is detected based on the detected pattern. In this way, in order to detect the state of the fence 10 and its surroundings based on the pattern included in the backscattered light, a special optical fiber called an FBG type optical fiber may be used as in Patent Documents 1 to 3. It is not necessary to use the OTDR type optical fiber together with the FBG type optical fiber as in Patent Documents 1 and 2, or to lay a plurality of optical fibers as in Patent Document 3. Therefore, the state of the fence 10 and its surroundings can be detected without using a special structure for detecting the state of the fence 10 and its surroundings. Moreover, since a special structure is not required, a monitoring system can be constructed at low cost.
[0044]
　Further, according to the present embodiment, the state of the fence 10 and its surroundings is detected based on the pattern corresponding to the state of the fence 10 and its surroundings contained in the backscattered light. That is, the present embodiment does not divide the state according to the strength of the vibration or the magnitude of the frequency (for example, the vibration is large, the frequency is high, and the state is specified) as in Cited Document 3, for example. , The state of the fence 10 and its surroundings is detected by dynamically pattern-analyzing those changes (for example, changes in the strength of vibration). Therefore, it is possible to detect the state of the fence 10 and its surroundings with high accuracy.
[0045]
　Further, according to the present embodiment, in order to detect the state of the fence 10 and its surroundings based on the pattern corresponding to the state of the fence 10 and its surroundings contained in the backscattered light, the contact with the fence 10 is made. Even for weak changes such as events around the fence 10 that do not accompany it, by detecting dynamic pattern fluctuations, it is clearly separated from other noise components such as wind, and the state in which the event is occurring is highly accurate. It is possible to detect it.
[0046]
　Further, the FBG type optical fiber used in Patent Documents 1 to 3 has a structure in which grating portions are provided at regular intervals, and intruders are detected at "points" provided with grating portions. On the other hand, in the present embodiment, the state of the fence 10 is detected by capturing the dynamic fluctuation pattern such as the vibration pattern of FIG. 4 as a “line”, so that the present embodiment is compared with Patent Documents 1 to 3. , The resolution and sensitivity are high, and the detection accuracy is high.
[0047]
　Further, according to the present embodiment, an optical fiber sensing technique using an optical fiber as a sensor is used. Therefore, there are advantages such as being unaffected by electromagnetic noise, eliminating the need for power supply to the sensor, being excellent in environmental resistance, and facilitating maintenance.
[0048]

　In the above-described embodiment, the example in which the monitoring target is the fence 10 (and its surroundings) has been described, but the monitoring target is not limited to the fence 10 (and its surroundings). First, the installation destination of the monitoring target may be an airport, a port, a plant, a nursing facility, a company building, a border, a nursery center, a home, or the like. In addition to the fence, the monitoring target may be a wall, a pipeline, a utility pole, a civil engineering structure, or the like. Further, the laying destination or burying destination of the optical fiber cable 20 when monitoring the monitoring target may be a wall, a pipeline, a utility pole, a civil engineering structure, a floor, or the like, in addition to the fence and the ground. For example, when monitoring a fence 10 installed in a nursing facility, predetermined events that occur in the fence 10 include a person hitting the fence 10, being caught by the fence 10 due to injury, etc., and a person escaping. Therefore, it is conceivable to climb the fence 10.
[0049]
　Further, in the above-described embodiment, it has been described that the fence 10 vibrates when a predetermined event occurs, but when these events occur, the fence 10 also undergoes changes in sound, temperature, strain, stress, and the like. , These changes are also transmitted to the optical fiber. Further, the patterns of sound, temperature, strain, stress, and the like are also dynamically fluctuating fluctuation patterns, and differ depending on the type of the event occurring on the fence 10. Therefore, the optical fiber detection unit 31 uses a distributed acoustic sensor, a distributed temperature sensor, and the like in addition to the distributed vibration sensor, and uses vibration, sound, temperature, and strain / stress. Etc. are detected and sensing data is generated, and the control unit 32 detects an event occurring in the fence 10 based on the sensing data reflecting changes in vibration, sound, temperature, strain, stress, and the like. May be detected. This makes it possible to further improve the detection accuracy.
[0050]
　Further, in the above-described embodiment, when a predetermined event occurs in the fence 10, the control unit 32 controls the angle, zoom magnification, etc. of the camera 40 that captures the area including the fence 10. However, the control may be continued even after a predetermined event occurs. For example, the control unit 32 may control the camera 40 so as to track a person, an animal, a car, or the like existing in the above-mentioned area. Further, the control unit 32 controls that when a person who is wandering around the fence 10 leaves an object such as a suspicious object, the control unit 32 controls a certain camera 40 to take a picture of the object, and the other cameras 40. You may control to track the person.
[0051]
　Further, the optical fiber detection unit 31 and the control unit 32 of the monitoring device 30 may be provided separately from each other. For example, the optical fiber detection unit 31 may be provided in the communication carrier station building, and the monitoring device 30 including the control unit 32 may be provided outside the communication carrier station building.
[0052]
　Further, in the above-described embodiment, only one optical fiber detection unit 31 is provided and occupies the optical fiber cable 20, but the present invention is not limited to this.
　For example, even if the optical fiber detection unit 31 is provided in the communication carrier station building and the optical fiber cable 20 is shared between the existing communication equipment provided inside the communication carrier station building and the optical fiber detection unit 31. good.
[0053]
　Further, one optical fiber detection unit 31 is provided in each of the plurality of communication carrier station buildings, and the optical fiber cable 20 is provided between the plurality of optical fiber detection units 31 provided in each of the plurality of communication carrier station buildings. May be shared.
　Further, a plurality of optical fiber detection units 31 may be provided in one communication carrier station building, and the optical fiber cable 20 may be shared among the plurality of optical fiber detection units 31.
[0054]
　Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. Various changes that can be understood by those skilled in the art can be made to the structure and details of the present disclosure within the scope of the present disclosure.
[0055]
　Some or all of the using an optical fiber as a sensor is used. Therefore, there are advantages such as being unaffected by electromagnetic noise, eliminating the need for power supply to the sensor, being excellent in environmental resistance, and facilitating maintenance.
[0048]

　In the above-described embodiment, the example in which the monitoring target is the fence 10 (and its surroundings) has been described, but the monitoring target is not limited to the fence 10 (and its surroundings). First, the installation destination of the monitoring target may be an airport, a port, a plant, a nursing facility, a company building, a border, a nursery center, a home, or the like. In addition to the fence, the monitoring target may be a wall, a pipeline, a utility pole, a civil engineering structure, or the like. Further, the laying destination or burying destination of the optical fiber cable 20 when monitoring the monitoring target may be a wall, a pipeline, a utility pole, a civil engineering structure, a floor, or the like, in addition to the fence and the ground. For example, when monitoring a fence 10 installed in a nursing facility, predetermined events that occur in the fence 10 include a person hitting the fence 10, being caught by the fence 10 due to injury, etc., and a person escaping. Therefore, it is conceivable to climb the fence 10.
[0049]
　Further, in the above-described embodiment, it has been described that the fence 10 vibrates when a predetermined event occurs, but when these events occur, the fence 10 also undergoes changes in sound, temperature, strain, stress, and the like. , These changes are also transmitted to the optical fiber. Further, the patterns of sound, temperature, strain, stress, and the like are also dynamically fluctuating fluctuation patterns, and differ depending on the type of the event occurring on the fence 10. Therefore, the optical fiber detection unit 31 uses a distributed acoustic sensor, a distributed temperature sensor, and the like in addition to the distributed vibration sensor, and uses vibration, sound, temperature, and strain / stress. Etc. are detected and sensing data is generated, and the control unit 32 detects an event occurring in the fence 10 based on the sensing data reflecting changes in vibration, sound, temperature, strain, stress, and the like. May be detected. This makes it possible to further improve the detection accuracy.
[0050]
　Further, in the above-described embodiment, when a predetermined event occurs in the fence 10, the control unit 32 controls the angle, zoom magnification, etc. of the camera 40 that captures the area including the fence 10. However, the control may be continued even after a predetermined event occurs. For example, the control unit 32 may control the camera 40 so as to track a person, an animal, a car, or the like existing in the above-mentioned area. Further, the control unit 32 controls that when a person who is wandering around the fence 10 leaves an object such as a suspicious object, the control unit 32 controls a certain camera 40 to take a picture of the object, and the other cameras 40. You may control to track the person.
[0051]
　Further, the optical fiber detection unit 31 and the control unit 32 of the monitoring device 30 may be provided separately from each other. For example, the optical fiber detection unit 31 may be provided in the communication carrier station building, and the monitoring device 30 including the control unit 32 may be provided outside the communication carrier station building.
[0052]
　Further, in the above-described embodiment, only one optical fiber detection unit 31 is provided and occupies the optical fiber cable 20, but the present invention is not limited to this.
　For example, even if the optical fiber detection unit 31 is provided in the communication carrier station building and the optical fiber cable 20 is shared between the existing communication equipment provided inside the communication carrier station building and the optical fiber detection unit 31. good.
[0053]
　Further, one optical fiber detection unit 31 is provided in each of the plurality of communication carrier station buildings, and the optical fiber cable 20 is provided between the plurality of optical fiber detection units 31 provided in each of the plurality of communication carrier station buildings. May be shared.
　Further, a plurality of optical fiber detection units 31 may be provided in one communication carrier station building, and the optical fiber cable 20 may be shared among the plurality of optical fiber detection units 31.
[0054]
　Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. Various changes that can be understood by those skilled in the art can be made to the structure and details of the present disclosure within the scope of the present disclosure.
[0055]
　Some or all of thing to the state of the monitoring target, and detects the state of the 　monitoring
　target based on the learning result and the pattern included in the optical signal received by the receiving unit.
Item 1. The monitoring system according to item 1.
[Claim 3]
　The monitoring system according to claim 1 or 2, 　further comprising a plurality of cameras,
　wherein the control unit
　controls a camera that captures an area including the monitoring target among the plurality of cameras .
[Claim 4]
　The monitoring system according to claim 3, 　wherein the control unit controls
　two or more cameras that capture an area including the monitoring target among the plurality of cameras .
[Claim 5]
　In the control unit,
　at least one of the two or more cameras captures the face of a person existing in the area, and at least one of the two or more cameras captures the entire area. The monitoring system according
　to claim 4, wherein the monitoring system is controlled so as to be used .
[Claim 6]

　The monitoring system according to any one of claims 1 to 5, 　wherein the pattern is a dynamically fluctuating fluctuation pattern .
[Claim 7]
　A receiving unit that receives an optical signal including a pattern according to a state to be monitored from at least one optical fiber included in the cable and detects the pattern from the received optical signal, and the
　monitoring based on the pattern. A
　monitoring device including a control unit that detects the state of the target .
[Claim 8]
　The control unit learns a pattern according to the state of the monitoring target, and detects the state of the 　monitoring
　target based on the learning result and the pattern included in the optical signal received by the receiving unit.
Item 7. The monitoring device according to item 7.
[Claim 9]
　The monitoring device according to claim 7 or 8, 　wherein the control unit
　controls a camera that captures an area including the monitoring target among a plurality of cameras .
[Claim 10]
　The monitoring device according to claim 9, 　wherein the control unit controls
　two or more cameras that capture an area including the monitoring target among the plurality of cameras .
[Claim 11]
　In the control unit,
　at least one of the two or more cameras captures the face of a person existing in the area, and at least one of the two or more cameras captures the entire area. 10. The monitoring device according to
　claim 10.
[Claim 12]

　The monitoring device according to any one of claims 7 to 11, 　wherein the pattern is a dynamically fluctuating fluctuation pattern .
[Claim 13]
　It is a monitoring method by a monitoring device, in which
　an optical signal including a pattern according to a state to be monitored is received from at least one optical fiber included in a cable, the pattern is detected from the received optical signal, and the pattern is
　described . A
　monitoring method for detecting the state of the monitoring target based on the above .
[Claim 14]

　Based on the procedure of receiving an optical signal including a pattern according to the state to be monitored from at least one optical fiber included 　in the cable to the computer and detecting the pattern from the received optical signal
　, and based on the pattern.
　A non-temporary computer-readable medium containing a procedure for detecting the state of the monitored object and a program for executing the procedure.