JP4685680B2 - Disaster prevention monitoring system and its disaster prevention equipment and monitoring center - Google Patents

Description

  The present invention is used in a disaster prevention monitoring system for remotely monitoring the state of a monitoring target that needs to be monitored for disaster prevention, such as a river increase due to rainfall or discharge, a landslide on a mountain slope, and the like. The present invention relates to disaster prevention facilities such as dam discharge monitoring devices, flood warning devices, landslide monitoring devices, debris flow monitoring devices, and monitoring centers that remotely control these disaster prevention facilities.

  In Japan, there are many rapid rivers and landslide hazard areas, and large-scale weather disasters are likely to occur due to large and small earthquakes and typhoons. Therefore, in order to understand the scale of damage to infrastructure facilities such as roads and buildings due to such a large-scale weather disaster, and to enable residents to promptly evacuate in the event of a disaster, remote monitoring of various disaster prevention information (telemetry) (Also called telemonitoring). In general, telemetry is realized by installing a telemetry observation device at an arbitrarily selected observation target location, acquiring observation data from various sensors in this telemetry observation device, and transferring this observation data to a monitoring center via a communication network. (For example, see Non-Patent Document 1).

  For example, a flood warning device or a discharge warning device is installed in a river basin to monitor water increase or flooding due to rainfall or discharge. In mountainous areas, a debris flow warning device or the like is installed to monitor the occurrence of landslides and debris flows on slopes and generate alarms. In these disaster prevention facilities, for example, a monitoring camera and various sensors are installed, and monitoring image data of a monitoring object and sensor measurement data captured by the monitoring camera are transmitted to a monitoring center via a communication network. In the monitoring center, the state change of the monitoring object is determined based on the monitoring image data and sensor measurement data transmitted from the disaster prevention facility, and the determination result is displayed. Such a disaster prevention monitoring system plays an extremely important role in avoiding disasters because it can quickly detect the occurrence of a disaster in a monitored object and issue an alarm.

Water level / rainfall remote monitoring system http://www.ikeda-keiki.co.jp/seihin/uryou/WEBsuii-uryoukei-u.html

  However, all of the disaster prevention equipment used in the conventional disaster prevention monitoring system monitors the state of monitoring objects such as rivers and mountain slopes, and the monitoring staff regularly checks the installation status of the disaster prevention equipment itself. It is common to check whether there is any abnormality by doing. For this reason, even if the disaster prevention equipment changes its position, tilts, breaks, etc. due to an earthquake, for example, it will be left undiscovered until a patrol is performed, and the disaster prevention equipment will not function normally during that time. Very unfavorable. Moreover, disaster prevention facilities such as discharge warning devices and debris flow warning devices are generally installed in places where monitoring personnel such as mountains are difficult to approach. For this reason, it was dangerous for the observer to look around, and the burden on work was heavy.

  The present invention has been made paying attention to the above circumstances, and its purpose is to make it possible to reliably and promptly detect abnormalities in the installation state of the disaster prevention equipment itself, thereby improving the reliability of the monitoring equipment and monitoring personnel. It is to provide a disaster prevention monitoring system, a disaster prevention facility, and a monitoring center for reducing the burden on the environment.

  In order to achieve the above object, the present invention provides a disaster prevention monitoring system comprising a disaster prevention facility installed at a place where a monitoring object can be monitored, and a monitoring center connected to the disaster prevention facility via a communication network. In addition, the marker is fixedly installed on the first structure of the disaster prevention facility, and the monitoring camera is installed on a second structure different from the first structure. Then, each of the monitoring object and the marker is imaged by a monitoring camera to obtain first image data including an image of the monitoring object and second image data including an image of the marker. The data is transmitted to the monitoring center via the communication network. In contrast, the monitoring center receives the first and second image data sent from the disaster prevention facility, and detects a change in the state of the monitoring object based on the received first image data. A first monitoring process is performed. At the same time, the state of the marker image included in the received second image data is compared with reference information representing the initial installation state of the marker stored in advance, and the first The presence / absence of displacement of the second structure relative to the first structure is determined, and the determination result is output.

  Therefore, according to this invention, the presence or absence of the relative displacement of the 1st and 2nd structure is determined based on the state of the marker image contained in the image data imaged with the surveillance camera. For this reason, for example, when a state change such as displacement, tilt, or damage occurs in a structure of a disaster prevention facility due to an earthquake or a typhoon, it is possible to quickly and reliably determine the displacement of the structure at the monitoring center. Become. In response to this determination, it is possible to quickly take appropriate measures such as starting preparations for restoration work. In addition, it is not necessary for the surveillance staff to go around the disaster prevention facilities. For this reason, it is possible to relieve the supervisor from dangerous and time-consuming tours, which can greatly reduce the burden on the supervisor.

  In addition, the existing monitoring camera used for monitoring the monitoring target is used to image the marker, and the communication means for transmitting the captured image data to the monitoring center is also performed using the existing means. . That is, one monitoring camera and communication means are used both for monitoring the monitoring object and for monitoring the structure of the disaster prevention facility itself. For this reason, it is not necessary to provide a separate camera and communication means for imaging and transmitting the marker, and this has the advantage that it can be realized at a low cost with a relatively small amount of equipment.

The present invention is also characterized by having the following various configurations.
In the first configuration, the second monitoring processing unit of the monitoring center stores first tolerance information representing an allowable range of the positional deviation of the marker image in advance, and the second image data captured by the monitoring camera. The first determination means determines whether the amount of positional deviation between the position of the marker image included in the reference image and the reference position of the marker image indicated by the reference information exceeds the range of the first tolerance information. . Then, when it is determined that the amount of positional deviation of the marker image exceeds the range of the first tolerance information, it is determined that a displacement has occurred in the second structure.
By configuring in this way, it is possible to reduce the influence of the vibration of the structure due to the wind and the vibration accompanying the passage of the vehicle, and accurately determine the abnormality of the second structure.

In the second configuration, in the second monitoring processing unit of the monitoring center, second tolerance information indicating an allowable range of the size of the marker image is further stored, and the first determining unit stores the second tolerance information. When it is determined that the positional deviation amount is within the range of the first tolerance information, the size of the marker image included in the second image data captured by the monitoring camera exceeds the range of the second tolerance information. Whether or not there is is determined by the second determination means. If it is determined that the size of the marker image exceeds the range of the second tolerance information, it is determined that a displacement has occurred in the second structure.
With this configuration, it is possible to detect the movement of the monitoring camera CM even when only one marker can be used and even when the position of the monitoring camera is displaced along the imaging direction of the marker.

In the third configuration, the disaster prevention facility is further provided with a sensor that measures a change in the surrounding environmental condition that causes a positional shift or a change in the size of the marker image, and the change in the environmental condition measured by the sensor Is transmitted to the monitoring center via the communication network. On the other hand, in the monitoring center, the second monitoring processing means receives the information indicating the change in the environmental condition transmitted from the disaster prevention facility, and sets the value indicated by the received information indicating the change in the environmental condition. In response, the first tolerance information or the second tolerance information is corrected.
If comprised in this way, 1st tolerance information or 2nd tolerance information will be adaptively corrected according to the change of the environmental conditions around disaster prevention equipment. Therefore, no matter how the environmental conditions around the disaster prevention equipment change, it is possible to always determine whether or not an abnormality has occurred in the structure using appropriate tolerance information.

In the fourth configuration, the disaster prevention facility is further provided with a sensor for measuring a change in the surrounding environmental condition that causes a positional shift or a change in the size of the marker image, and the change in the environmental condition measured by the sensor. Is transmitted to the monitoring center via the communication network. On the other hand, in the monitoring center, the second monitoring processing means receives the information indicating the change in the environmental condition transmitted from the disaster prevention facility, and the value indicated by the received information indicating the change in the environmental condition is It is determined whether or not it is equal to or less than a predetermined threshold value. Then, the determination process by the first or second determination unit is performed during a period in which the value indicated by the information indicating the change in the environmental condition is equal to or less than the threshold value, and the first and second processes are performed in other periods. The determination process by the determination unit 2 is stopped.
With this configuration, for example, when an earthquake is occurring, the wind is strong, and the structure is greatly shaken, or the vibration caused by the passing vehicle is large, the structure of the structure using the image data captured by the monitoring camera at this time is used. The determination of displacement is stopped. For this reason, it is possible to accurately determine the abnormality of the structure by eliminating the influence of the vibration of the structure due to the wind and the vibration accompanying the passage of the passing vehicle.

In the fifth configuration, means for outputting a third image data including an image of a position-invariant reference object by imaging a position-invariant reference object existing at a position that can be seen from the monitoring place on the monitoring camera of the disaster prevention facility. Further, this third image data is transmitted to the monitoring center via the communication network. On the other hand, in the monitoring center, when the second monitoring processing means determines that the amount of positional deviation of the marker image is within the range of the first tolerance information, the third image data sent from the disaster prevention facility is Comparison is made with reference image data corresponding to the position of the reference object stored in advance. And the presence or absence of the displacement of the said 1st and 2nd structure with respect to the ground is determined based on the comparison result.
With this configuration, even if the first and second structures are displaced while maintaining the relative positional relationship due to, for example, crustal deformation or landslide caused by an earthquake, a captured image of a reference object that does not change position can be obtained. In addition, the occurrence of the positional deviation can be reliably detected. As the reference object that does not change its position, it is preferable to use celestial bodies such as the moon, stars, and constellations. It is also possible to use characteristic landscapes such as the contours of distant mountains.

In the sixth configuration, the monitoring center further includes means for receiving a registration request for reference image data, and according to the input of the registration request, remotely adjusts the imaging direction of the monitoring camera via the communication network, and Second image data received from the disaster prevention facility with the imaging direction adjusted is stored as the reference image data.
With this configuration, when the operation of the system is started or when the position of the monitoring camera with respect to the second structure is displaced during the operation, for example, the monitoring person simply inputs a reference image data registration request, The reference image data is automatically initialized or updated. Therefore, the system operation can be started or resumed as soon as possible. In addition, the burden on the supervisor due to the setting work of the reference image data can be reduced.

  In short, according to the present invention, an abnormality in the installation state of the disaster prevention equipment itself can be detected reliably and quickly, thereby improving the reliability of the monitoring equipment and reducing the burden on the observer, and the disaster prevention equipment. And a monitoring center can be provided.

Embodiments of a disaster prevention monitoring system according to the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic configuration diagram showing a first embodiment of a disaster prevention monitoring system according to the present invention. This system includes a plurality of disaster prevention facilities BS1 to BSn and a monitoring center CS, which are connected via a communication network NW. Each of the disaster prevention facilities BS1 to BSn is installed at a position where, for example, a river or a mountain slope that is a monitoring target can be seen in a river basin or a mountainous area. The monitoring center CS is provided, for example, in a national or local government office, and includes a server device SV.
The communication network NW includes, for example, an IP (Internet Protocol) network represented by the Internet and a plurality of access networks for accessing the IP network. As the access network, for example, a DSL (Digital Subscriber Line) or a wired subscriber network using an optical transmission line, a LAN, a wireless LAN (Local Area Network), a mobile communication network, or a dedicated line network is used.

  By the way, disaster prevention equipment BS1-BSn is comprised as follows. FIG. 2 is a diagram showing the configuration. That is, the disaster prevention facilities BS1 to BSn include a first structure 1a configured in a box shape and a second structure 2a configured in a tower shape, and an alarm is provided above the second structure 2a. An apparatus RS and a monitoring camera CM are installed. The alarm device RS has a loudspeaker equipped with a speaker and a disaster prevention radio receiver, and receives an alarm signal transmitted from the monitoring center CS or the like by the disaster prevention radio receiver and generates an alarm sound from the loudspeaker. .

  The first structure 1a is provided with four markers M1 to M4 at the four corners of the upper surface portion. FIG. 3 shows an example of the mounting structure, and the markers M1 to M4 are attached to the first structure 1a via the mounting tool. The markers M1 to M4 are used for detecting a structural abnormality of the first structure 1a or the second structure 2a, in particular, a structural abnormality such as displacement, inclination, or collapse of the second structure 2a. Thus, an LED (Light Emitting Diode) that emits light upward is provided.

  The first structure 1a accommodates a power supply device and a camera server CSV described later. The power supply device generates a power supply voltage based on the output of a commercial power supply or a battery. The power supply device supplies the power supply voltage to the alarm device RS and the monitoring camera CM and supplies a driving current to the markers M1 to M4. To emit light.

  The monitoring camera CM and camera server CSV are configured as follows. FIG. 4 is a block diagram showing the configuration. That is, the surveillance camera CM is composed of the camera body 11 and the camera drive unit 12. The camera drive unit 12 includes a rotation mechanism that uses a motor as a power source, and changes the imaging direction (angle) of the camera body 11 in accordance with a drive signal supplied from the camera server CSV. The camera body 11 captures the image capturing direction set by the camera driving unit 12 and outputs the captured image signal to the camera server CSV via the signal line VL.

  The camera server CSV includes a communication interface (communication I / F) 13 and a control unit 14. The communication I / F 13 is connected to the communication network NW via the communication line WL, and performs data communication with the server device SV of the monitoring center CS according to a communication protocol defined by the communication network NW. The control unit 14 drives the camera driving unit 12 according to the imaging instruction information sent from the server device SV of the monitoring center CS, and controls the imaging direction of the camera body 11. Further, the control unit 14 encodes and packetizes the captured image signal output from the camera body 11 and transmits the packetized image data from the communication I / F 13 to the server device SV of the monitoring center CS.

  On the other hand, the server apparatus SV is configured as follows. FIG. 5 is a block diagram showing the functional configuration. That is, the server apparatus SV includes a central processing unit (CPU) 21. A program memory 23, a data memory 27, a communication interface (communication I / F) 28, and an input / output interface (input / output I / F) 29 are connected to the CPU 21 via the bus 22.

  The data memory 27 is provided with a reference position information storage unit 271 and a tolerance information storage unit 272 in addition to an area for storing captured image data of the monitoring camera CM. The reference position information storage unit 271 stores information representing a marker determination reference position and a size reference range for detecting a positional shift and a size change of the marker image in the captured image data. In the tolerance information storage unit 272, the first and second tolerance information T1 and T2 used for determining whether or not the amount of positional deviation and the amount of change in the size of the marker image are within an allowable range, respectively. Is memorized. As the storage medium of the data memory 27, a semiconductor memory such as a RAM or a flash memory, or a magnetic disk such as a hard disk is used.

  Under the control of the CPU 21, the communication I / F 28 transmits various instruction information and receives image packet data with the camera servers CSV of the disaster prevention facilities BS1 to BSn via the communication network NW. As a communication protocol, for example, TCP / IP (Transmission Control Protocol / Internet Protocol) is used.

  An input device 30 and a display device 31 are connected to the input / output I / F 29. The input device 30 includes a keyboard and a pointing device such as a mouse. The display device 31 includes, for example, a liquid crystal display (LCD). The input / output I / F 29 captures operation information input by the administrator in the input device 30. At the same time, under the control of the CPU 21, the operation information input by the input device 30, the monitoring image data sent from each disaster prevention equipment BS1 to BSn, the structural abnormality of the disaster prevention equipment BS1 to BSn determined by the CPU21. A determination result or the like is displayed on the display device 31. When a printer is connected, the determination result and the like can be output to the printer.

  In the program memory 23, in addition to the first monitoring processing program 24 for monitoring the state of monitoring objects such as rivers and mountain slopes, a second application program necessary for carrying out the present invention is provided as a second application program. A monitoring processing program 25 and a determination result output control program 26 are stored. The first monitoring processing program 24 causes the monitoring camera CM of each disaster prevention equipment BS1 to BSn to image a monitoring object such as a river or a mountain slope, and receives the captured image data via the communication I / F 28. The CPU 21 is caused to execute processing to be displayed on the display device 31.

The second monitoring processing program 25 includes a camera imaging control program 251, a marker position deviation determination program 252, a marker size determination program 253, and an abnormality determination program 254.
The camera imaging control program 251 causes the CPU 21 to execute the following processing. That is, when determining the structural abnormality of the disaster prevention equipment BS1 to BSn, the imaging instruction information is sent to the disaster prevention equipment to be determined to variably set the imaging direction of the monitoring camera CM, thereby imaging each of the markers M1 to M4. . Then, the image data including the images of the markers M1 to M4 captured by the monitoring camera CM is received via the communication I / F 28 and stored in the captured image data storage area of the data memory 27.

  The marker position deviation determination program 252 causes the CPU 21 to execute the following processing. That is, for the marker image included in the stored captured image data, the position of the marker image with respect to the reference position of the monitoring camera CM is calculated. Next, a positional deviation amount between the calculated position of the marker image and the reference position stored in the reference position storage unit 271 of the data memory 27 is calculated. Then, it is determined whether the calculated positional deviation amount is within an allowable range indicated by the first tolerance information T1 stored in the tolerance information storage unit 272 of the data memory 27.

  The marker size determination program 253 causes the CPU 21 to execute the following processing. That is, when the amount of displacement is determined to be within the allowable range by the marker displacement determination program 252, the size of the marker image included in the stored captured image data is detected. Next, the size of the detected marker image is compared with the reference range of the size stored in the reference position storage unit 271 of the data memory 27, and the difference is calculated. Then, it is determined whether or not the calculated magnitude difference is within an allowable range indicated by the second tolerance information T2 stored in the tolerance information storage unit 272 of the data memory 27.

The abnormality determination program 254 has a structure between the first structure 1a and the second structure 2a based on the determination result of the marker displacement determination program 252 and the determination result of the marker size determination program 253. The CPU 21 is caused to execute processing for determining whether or not the above displacement has occurred.
The determination result output control program 26 causes the CPU 21 to execute processing for causing the display device 31 to display a message representing the determination result by the abnormality determination program 254 via the input / output I / F 29.

  Next, the monitoring operation | movement of the disaster prevention equipment BS1-BSn by the disaster prevention monitoring system comprised as mentioned above is demonstrated. 6 and 7 are flowcharts showing control procedures and control contents by the monitoring camera CM and the camera server CSV of the disaster prevention facilities BS1 to BSn and the server device SV of the monitoring center CS.

  While performing normal monitoring and control operations on monitoring objects such as rivers and mountain slopes, the server apparatus SV monitors the arrival of monitoring timings for the disaster prevention facilities BS1 to BSn in step S61. In this state, for example, when the monitoring timing for the disaster prevention facility BS1 is reached, the server device SV generates marker imaging instruction information in step S62, and transmits the generated imaging instruction information to the disaster prevention facility BS1 from the communication I / F 28. To do.

  On the other hand, in the disaster prevention equipment BS1, the camera server CSV receives the marker imaging instruction information in step S63. Upon receiving the imaging instruction information, the camera server CSV first sets the imaging direction of the monitoring camera CM to a reference position as shown in FIG. 9A, for example, in step S64, and then, in step S65, the imaging direction of the monitoring camera CM. Is changed by a predetermined amount by the pan or tilt operation, and the marker M1 is directed in the direction of imaging as shown in FIG. 9B. Then, when the monitoring camera CM images the marker M1 in step S66, the camera server CSV encodes the captured image signal output from the monitoring camera CM in step S67 and further packetizes it, and then from the communication I / F 13 to the server device SV. Send to.

  Subsequently, the camera server CSV determines in step S68 whether or not the imaging of all the markers M1 to M4 has been completed. If there is a marker that has not been imaged, the process returns to step S65 to direct the imaging direction of the monitoring camera CM toward the next marker M2, for example, as shown in FIG. Send to device SV. Similarly, as long as unmarked markers remain, the imaging control process from step S65 to step S68 is repeatedly executed. When the imaging of all the markers M1 to M4 and the transmission of the captured image data are completed, the standby state is restored.

  Each time the captured image data of each of the markers M1 to M4 is sent from the disaster prevention facility BS1, the server device SV receives the captured image data in step S69 and stores it in the image data storage area of the data memory 27. When all the captured image data are stored, first, in step S70, a marker image is detected from each of the stored captured image data, and the position of the marker image based on the reference position of the monitoring camera CM is detected. Is calculated. Next, in step S <b> 71, a positional deviation amount between the calculated position of the marker image and the reference position stored in the reference position storage unit 271 of the data memory 27 is calculated. Then, it is determined in step S72 whether or not the calculated positional deviation amount is within an allowable range indicated by the first tolerance information T1 stored in the tolerance information storage unit 272 of the data memory 27.

The positional deviation determination processing from step S70 to step S72 will be specifically described with reference to FIGS.
If the image displacement of the marker M1 with respect to the reference position is very small and the image position of the marker M1 is within the tolerance range indicated by the tolerance information T1 as shown in FIG. 9B, the displacement is within the tolerance range. Is determined to be within. Similarly, for the image of the marker M2, if the positional deviation is very small and the positional deviation amount is within the allowable range indicated by the tolerance information T1 as shown in FIG. 9C, the positional deviation of the marker M2 is allowable. Determined to be within range.

  On the other hand, it is assumed that the second structure 2a is inclined or damaged by the influence of an earthquake or a typhoon, and the position of the monitoring camera CM is displaced from the reference position as shown in FIG. 10, for example. When the monitoring camera CM captures an image of the marker M1 in this state, the image position of the marker M1 in the image data moves from the position where it should be, and the amount of movement is within the allowable range indicated by the tolerance information T1 as shown in FIG. Exceed. For this reason, it is determined that the positional deviation of the marker image M1 is outside the allowable range.

  Further, even if the position of the monitoring camera CM is displaced, this displacement may not be detected as a displacement of the marker image depending on the direction of the displacement. For example, as shown in FIG. 11A, when the monitoring camera CM is displaced in the imaging direction of the marker M1, no positional deviation of the image of the marker M1 is detected. However, when the marker M2 is picked up by the monitoring camera CM, the image position of the marker M2 in the image data moves from the original position, and the amount of movement is within the allowable range indicated by the tolerance information T1 as shown in FIG. Exceed. For this reason, it is determined that the positional deviation of the image of the marker M2 is outside the allowable range.

  In this way, the surveillance camera CM moves in any direction by imaging the four markers M1 to M4 arranged so as to be orthogonal to each other and detecting the positional deviation of the images of the markers M1 to M4 from the image data. Even if it is displaced, the displacement of the monitoring camera CM can be reliably detected as the displacement of the markers M1 to M4.

Furthermore, for example, there may be a case where only one of the plurality of markers M1 to M4 can be imaged due to the influence of an obstacle such as a plant. In preparation for this case, the server apparatus SV executes determination processing based on the size of the marker image as follows.
That is, in step S73, the server device SV detects a marker image included in the captured image data by image recognition processing, and calculates the size from the number of pixels. In step S74, the size of the calculated marker image is compared with the reference range of the size stored in the reference position storage unit 271 of the data memory 27, and the difference is calculated. Then, it is determined whether or not the calculated magnitude difference is within an allowable range indicated by the second tolerance information T2 stored in the tolerance information storage unit 272 of the data memory 27.

  Note that the process of calculating the difference between the calculated size of the marker image and the reference range of the stored size is omitted, and the size of the calculated marker image is indicated by the second tolerance information T2. Direct comparison with the allowable range may be performed to determine whether the size of the marker image is within the allowable range.

The marker image size determination processing from step S73 to step S74 will be specifically described with reference to FIG.
If the position of the monitoring camera CM is not displaced from the reference position, no positional deviation of the image of the marker M1 is detected as shown in FIG. 12A, and the size of the image of the marker M1 is the second size. It falls within the minimum value criterion T2min and the maximum value criterion T2max indicated by the tolerance information T2. Accordingly, in this case, the size of the image of the marker M1 is determined to be within the allowable range.

  On the other hand, it is assumed that the position of the monitoring camera CM is displaced along the optical axis in a direction away from the marker M1, for example, as shown in FIG. Also in this case, the positional deviation of the image of the marker M1 is not detected. However, the size of the image of the marker M1 in the image data is smaller than it should be, and the amount of change is smaller than the minimum value criterion T2min indicated by the tolerance information T2 as shown in FIG. . For this reason, it is determined that the size of the image of the marker M1 is outside the allowable range.

  Further, it is assumed that the position of the monitoring camera CM is displaced along the optical axis in a direction approaching the marker M1 as shown in FIG. 12C, for example. In this case, the size of the image of the marker M1 in the image data is larger than it should be, and the amount of change is based on the maximum value criterion T2max indicated by the tolerance information T2 as shown in FIG. growing. For this reason, it is determined that the size of the image of the marker M1 is outside the allowable range.

  Note that the marker image size determination process in steps S73 and S74 described above is executed when a position shift of the marker image exceeding the allowable range is not detected in steps S70 to S72. In this way, unnecessary determination processing can be prevented from being performed.

  When the marker image misregistration determination process and the marker image size determination process are completed, the server apparatus SV proceeds to step S75, and based on the determination result, the first structure 1a or the second structure. The presence or absence of structural abnormality of the object 2a is determined. In this determination process, if any of the images of the markers M1 to M4 is detected to have a positional deviation that exceeds the allowable range, or if the size of the image of the marker M1 is determined to exceed the allowable range, there is a structural abnormality. It is determined. On the other hand, when no positional deviation exceeding the allowable range is detected in the images of all the markers M1 to M4 and it is determined that the size of the image of the marker M1 is within the allowable range, it is determined that there is no structural abnormality. The

  When the server SV determines that there is a structural abnormality by the determination process, the server SV proceeds to step S76. Then, it is determined that a structural abnormality has occurred in at least one of the first structure 1a and the second structure 2a, and a notification message to that effect is displayed on the display device 31. On the other hand, if it is determined by the determination process that there is no structural abnormality, the process proceeds to step S77. Then, it is determined that neither the first structure 1a nor the second structure 2a has a structural abnormality, and a notification message to that effect is generated and displayed on the display device 31. When a notification message indicating that a structural abnormality has occurred is displayed, it may be displayed blinking, the display color may be changed, or a sounding sound may be generated simultaneously.

The marker determination reference position for detecting the displacement of the marker image and the marker size reference range for detecting a change in the size of the marker image are initially set or updated as follows. FIG. 8 is a flowchart showing the control procedure and control contents. Here, a case where the marker determination reference position and the reference range of the marker size are updated while the reference point of the monitoring camera CM is fixed will be described as an example.
That is, when the administrator inputs a reference information setting request in the monitoring center CS, the server device SV reads information indicating the camera reference position stored in the data memory 27 in step S82, and includes the setting including the reference position information. The instruction is transmitted to the disaster prevention equipment BS1 to be updated.

  On the other hand, when the camera server CSV receives the setting instruction in step S83, first, in step S84, the camera server CSV sets the attitude of the monitoring camera CM to the reference position specified by the setting instruction. Next, in step S85, the surveillance camera CM is moved (pan and tilt) so that the imaging direction is directed to one of the markers (for example, M1), the marker is imaged in step S86, and the captured image data is stepped. In step S87, the message is transmitted to the server apparatus SV. The imaging of the marker and the transmission processing of the captured image data are sequentially performed for each of the markers M1 to M4. When the completion of imaging and transmission of all the markers M1 to M4 is detected in step S88, the standby state is restored.

  When the server device SV receives the captured image data of each of the markers M1 to M4 in step S89 and stores it in the data memory 27, first, in step S90, the server device SV performs image processing on the image data to detect a marker image. At the same time, in step S91, the movement amount of the monitoring camera CM moved to obtain the captured image data of each of the markers M1 to M4 is acquired from the camera server CSV. Next, in step S92, the server device SV calculates a marker position with the reference point of the monitoring camera CM as a base point, and in step S93, information indicating the calculated marker position is used as new marker determination reference position information. The data is stored in the reference information storage unit 271 of the data memory 27.

  Next, in step S94, the server device SV calculates the size of the markers M1 to M4 included in each of the captured image data based on the number of pixels, and the size of the calculated marker image in step S95. The reference range of the size is calculated based on the above and stored in the reference information storage unit 271 of the data memory 27 as a new reference range of the size of the marker image in step S96.

  Here, the case where the reference point is fixed and the marker position is corrected and updated has been described as an example. However, when the reference point can be reset more quickly according to the movement amount of the monitoring camera CM, for example, all markers The center positions of all the markers may be calculated from the amount of movement from the reference point, and the center position may be set as a new reference point.

  As described above, in the first embodiment, four markers M1 to M4 are installed at the four corners of the upper surface of the first structure 1a in which the power supply device and the camera server CSV are accommodated, and these markers M1 to M4 are installed. Are respectively imaged by the monitoring camera CM installed on the second structure 2a, and the captured image data is sent from the camera server CSV to the server device SV of the monitoring center. Then, the server SV calculates a positional deviation of the marker image in the sent captured image data with respect to the reference position, determines whether the calculated positional deviation is within an allowable range, and the determination result Based on the above, it is determined whether or not a relative structural abnormality has occurred in the first and second structures 1a and 2a.

  Therefore, for example, when a change in position such as displacement, inclination, or damage occurs in the structure of the disaster prevention equipment BS1 to BSn due to, for example, an earthquake or a typhoon, the displacement of the structure is quickly and reliably determined in the monitoring center CS. Is possible. In response to this determination, it is possible to quickly take appropriate measures such as starting preparations for restoration work. In addition, it is not necessary for the surveillance staff to go around the disaster prevention facilities BS1 to BSn. For this reason, it is possible to relieve the supervisor from dangerous and time-consuming tours, which can greatly reduce the burden on the supervisor.

  Moreover, the existing camera server CSV is also used as a communication means for imaging the markers M1 to M4 using the existing monitoring camera CM used for monitoring the monitoring object and transmitting the captured image data to the monitoring center CS. Etc. are used. For this reason, there is no need to separately provide a camera and a camera server for imaging and transmission of the markers M1 to M4, and there is an advantage that this can be realized at a low cost with a relatively small amount of equipment.

  In the first embodiment, when a positional deviation exceeding an allowable range is not detected in the positional deviation determination process, a displacement of the size of the marker image included in the captured image data is calculated, and this calculation is performed. By selectively determining whether or not the size of the marker image is within an allowable range, it is determined whether or not a structural abnormality has occurred. Therefore, even when only one marker can be used, and even when the position of the monitoring camera CM is displaced along the imaging direction of the marker, the movement of the monitoring camera CM can be detected.

(Second Embodiment)
In the second embodiment of the present invention, the disaster prevention facilities BS1 to BSn are provided with a sensor group for measuring a change in the environmental condition of the surroundings that causes a positional shift or a size change of the marker image. The first used for determining whether or not the positional deviation amount and the size of the marker image are within the allowable range based on the information representing the change in the environmental condition measured by the sensor group of the disaster prevention facility. The tolerance information T1 and the second tolerance information T2 are corrected.

FIG. 13 is a diagram showing the configuration of the disaster prevention facilities BS1 to BSn in the second embodiment of the present invention. In the figure, the same parts as those in FIG.
In the first structure 1b having a box shape, a power supply device and a camera server CSV are accommodated as in the first embodiment. Further, four markers M1 to M4 are installed at the four corners of the upper surface portion of the first structure 1b.

  On the other hand, an alarm device RS, a monitoring camera CM, and a sensor unit SU are installed above the second structure 2b configured in a bowl shape. The sensor unit SU is a wind force (or wind speed) sensor that detects the wind force (or wind speed) that causes vibration to the second structure 2b, and the periphery that similarly causes vibration to the second structure 2b. A traffic volume sensor for measuring the traffic volume of the passing vehicle. In addition, it may replace with the said wind force (or wind speed) sensor and a traffic utilization sensor, and may provide the vibration sensor, acceleration sensor, etc. which detect directly the vibration which generate | occur | produces in the 2nd structure 2b.

FIG. 14 is a block diagram illustrating a configuration of the monitoring camera CM and the sensor unit SU provided in the disaster prevention facilities BS1 to BSn, and the camera server CSV in the first structure 1b. In the figure, the same parts as those in FIG.
The control unit 140 of the camera server CSV has a function of controlling the imaging direction of the camera body 11, a function of encoding a captured image signal output from the camera body 11, and transmitting it to the server device SV of the monitoring center CS, and a sensor unit. A function of encoding data measured by the SU and transmitting the data to the server device SV of the monitoring center CS.

  On the other hand, the server apparatus SV is configured as follows. FIG. 15 is a block diagram showing the functional configuration. In the figure, the same parts as those in FIG. That is, the data memory 27 is provided with a tolerance information selection table 273. In the tolerance information selection table 273, for example, as shown in FIG. 16, the first measured wind force a1, a2,..., Am and the traffic measured values b1, b2,. , T1m and the second tolerance information optimum values T21, T22,..., T2m are stored.

  In the program memory 23, a tolerance information correction program 254 is newly stored as one of the second monitoring processing programs 25. This tolerance information correction program 255 is based on the measurement data of the wind sensor and the traffic use sensor acquired from the disaster prevention equipment BS1 to BSn when determining whether the positional deviation amount and the size of the marker image are within the allowable range. In addition, the CPU 21 is caused to execute processing for reading out the optimum tolerance information from the tolerance information selection table 273 under the current environmental conditions.

  Next, the monitoring operation | movement of the disaster prevention equipment BS1-BSn by the disaster prevention monitoring system comprised as mentioned above is demonstrated. FIGS. 17 and 18 are flowcharts showing control procedures and control contents by the monitoring camera CM and the camera server CSV of the disaster prevention equipment BS1 to BSn and the server device SV of the monitoring center CS, and are the same as those in FIGS. Are denoted by the same reference numerals.

  When the transmission process of the captured image data of one marker is completed in step S67, the camera server CSV moves to step S81 and acquires the wind force measurement data and the traffic volume measurement data at this time from the sensor unit SU. These measurement data are transmitted from the communication I / F 13 to the server device SV in step S82.

  On the other hand, when the captured image data is received in step S69, the server device SV subsequently receives the measurement data in step S83. In step S84, first tolerance information T11,... Corresponding to the measurement data is read from the tolerance information selection table 273 based on the received measurement data. Subsequently, in step S72, the positional deviation amount of the marker image calculated in step S71 is compared with the allowable range indicated by the read first tolerance information T11,. It is determined whether it is within the range. That is, in the determination process of the positional deviation of the marker image, it is determined whether or not the positional deviation amount is within an allowable range in consideration of the environmental conditions at that time, that is, vibration due to wind force and traffic volume.

  Further, when determining whether or not the change in the size of the marker image is within the allowable range, the second corresponding to the measurement data from the tolerance information selection table 273 based on the received measurement data in step S85. Tolerance information T21,. Subsequently, in step S74, the size of the marker image calculated in step S73 is compared with the allowable range indicated by the second tolerance information T21,... Read from the tolerance information selection table 273. It is determined whether or not the size of the marker image is within an allowable range. That is, in the marker image size determination process, as in the case of the marker image misregistration determination process, the size of the mark image is considered in consideration of the environmental conditions at that time, that is, vibration due to wind force and traffic volume. Is determined to be within an allowable range.

  When the marker image misregistration determination process and the marker image size determination process are completed, the server apparatus SV proceeds to step S75, and based on the determination result, the first structure 1b or the second structure. The presence or absence of structural abnormality of the structure 2b is determined, and the determination result is displayed on the display device 31 in steps S76 and S77.

  As described above, in the second embodiment, each of the disaster prevention facilities BS1 to BSn is provided with the sensor unit SU that measures the environmental condition, and the tolerance information that stores the optimum tolerance information in the server apparatus SU in association with the environmental condition. A selection table 273 is provided. When determining whether the positional deviation amount and size of the marker image are within the allowable range, the optimum tolerance information for the measurement data acquired from the sensor unit SU is read from the tolerance information selection table 273 and the determination is performed. It is intended to be used.

  Therefore, in the process of determining the displacement of the marker image and the process of determining the size, it is determined whether the displacement and the amount of displacement are within an allowable range in consideration of the environmental conditions at that time, that is, vibrations due to wind force and traffic. can do. As a result, it is possible to always determine whether or not an abnormality has occurred in the structure using appropriate tolerance information, no matter how the environmental conditions around the disaster prevention facility change.

(Other embodiments)
In the first embodiment, after the server device SV has acquired all the captured image data of the four markers M1 to M4, the position deviation or size determination processing is executed for each of them. However, the present invention is not limited to this, and a positional deviation or size determination process may be executed every time captured image data of one marker is acquired. In this way, for example, if a positional deviation is detected in the imaged image data of the first marker, it is possible to eliminate the need for the imaging operation of other markers thereafter, thereby determining the structural abnormality of the disaster prevention equipment. While shortening the time which a process requires, the processing burden of server apparatus SV can be reduced.

In the second embodiment, based on the measurement data acquired from the sensor unit SU of the disaster prevention facility, the first and second tolerance information T1 and T2 reflecting the current environmental conditions are selected and determined. I used it. However, the present invention is not limited thereto, and the measurement data acquired from the sensor unit SU is compared with a preset threshold value, thereby determining whether or not the current environmental condition is a condition suitable for the determination. When it is determined that the current environmental conditions are suitable for the determination, the determination processing from step S70 shown in FIG. 17 and FIG. 18 is executed. When it is determined that the current environmental conditions are not suitable, the determination processing is performed. May not be performed.
In this way, for example, when an earthquake occurs, the wind is strong and the structure is shaken, or there are many passing vehicles and the vibration is large, the displacement of the structure using the imaged image data of the monitoring camera CM The determination is stopped. For this reason, it is possible to accurately determine the abnormality of the structure by eliminating the influence of the vibration of the structure due to the wind and the vibration accompanying the passage of the passing vehicle.

In the second embodiment, the measurement data of the sensor unit SU is acquired after the marker image is captured and transmitted. However, the present invention is not limited to this, and the server device SV acquires measurement data of the sensor unit SU prior to the imaging and transmission processing of the marker image, and compares the acquired measurement data with a preset threshold value to thereby determine the current environmental conditions. Is a condition suitable for the determination. When it is determined that the current environmental conditions are suitable for the determination, the processing after step S62 shown in FIG. 17 and FIG. 18 is executed, and when it is determined that the current environmental conditions are not suitable, the processing is performed. It may not be possible.
In this way, under the situation where the environmental conditions are getting worse, not only the marker image determination process but also the imaging and transmission process of the marker image can be stopped, whereby the processing load on the camera server CSV and the server apparatus SV is reduced. Can be reduced.

  In the first and second embodiments, the monitoring timing is periodically set in the server device SV, and a monitoring instruction is transmitted to the disaster prevention equipment BS1 to BSn each time the monitoring timing arrives, and the marker imaging process and its A determination process such as misalignment using captured image data is executed. However, the present invention is not limited thereto, and the disaster prevention facilities BS1 to BSn are provided with a wind sensor, a traffic sensor, or a vibration sensor in place of them as in the second embodiment, and the measurement data of these sensor groups deteriorate the environmental conditions. When the first threshold value shown is exceeded, this may be used as a trigger to start marker imaging processing and determination processing such as positional deviation using the captured image data.

  If it does in this way, the structural abnormality determination process of disaster prevention equipment BS1-BSn will be performed only when it becomes an environmental condition which may cause abnormality in a structure in disaster prevention equipment BS1-BSn. Therefore, it is possible to prevent the useless determination process from being performed and to prevent the original monitoring operation on the monitoring target object such as a river or a mountain slope as much as possible.

  In addition, the process which generate | occur | produces the said trigger may be performed in disaster prevention equipment BS1-BSn, and may be performed in server apparatus SV. Further, the trigger is such that the measurement data of the sensor group exceeds a first threshold value indicating that the environmental condition is deteriorated, and then the measurement data is less than a second threshold value indicating that the environmental condition has settled down. It may be set to occur when it is detected that the drop has occurred. In this way, the structure abnormality determination process is executed after the environmental condition has settled down from the deteriorated state, so that the influence of the environmental condition is reduced without being affected by the environmental condition. Therefore, it is possible to make an accurate determination without taking various measures.

  In the first and second embodiments, the relative displacement between the first structure and the second structure is detected based on the displacement or size change of the marker image, and this displacement is detected. Is determined as a structural abnormality of the disaster prevention equipment BS1 to BSn. However, for example, when a landslide occurs and the disaster prevention equipment BS1 to BSn moves while maintaining the relative positional relationship between the first structure and the second structure, Abnormalities cannot be detected only by displacement or change in size.

Therefore, in order to detect an abnormality even in such a case, it is preferable to take the following measures.
That is, the server apparatus SV accepts an imaging instruction request for a surrounding image by an operator, and transmits this imaging instruction request to the disaster prevention facility to be investigated. On the other hand, in the disaster prevention equipment, the camera server CSV changes the posture of the monitoring camera CM in response to the above imaging instruction request, and thereby a predetermined invariable object, for example, a celestial body such as a star or a constellation or a landscape such as a distant mountain range To image. Then, the captured image data of the invariant obtained as a result is transmitted from the communication I / F 13 to the server device SV.

The server device SV receives the captured image data of the invariant sent from the disaster prevention facility, and detects the image of the invariant from the captured image data. Then, the positional deviation of the image position of the invariant with respect to the reference position stored in advance is calculated, and it is determined whether the positional deviation amount is within an allowable range. And as a result of this determination, if the amount of misalignment is within the allowable range, it is determined that the disaster prevention facility does not move. On the other hand, if the amount of misalignment exceeds the allowable range, the disaster prevention facility is moving. judge.
By configuring in this way, even when the disaster prevention facilities BS1 to BSn are moved while maintaining the relative positional relationship between the first structure and the second structure due to a landslide or the like, the abnormality can be reliably ensured. Can be detected.

  In the first and second embodiments, the case where the surveillance camera CM of a type in which the imaging direction is changed by pan and tilt drive is described as an example, but an omnidirectional camera can also be used. The omnidirectional camera creates an omnidirectional panoramic image by image processing. For this reason, the created panoramic image and the reference image stored in advance are compared by synchronizing the imaging direction by pattern matching processing of the image, and detecting the positional deviation of the matching pattern, thereby It is possible to determine misalignment.

  In the first and second embodiments, the case where all processes are executed by one server SV in the monitoring center CS has been described as an example. However, a plurality of server devices may be used in combination. . For example, image processing for detecting misalignment from captured image data, communication processing between disaster prevention facilities, and other control calculation processing may be distributed by separate server devices.

  Others, installation purpose and structure of disaster prevention equipment, installation position of surveillance camera and marker, types and number of surveillance cameras and markers, server device configuration, communication network type and configuration, marker image misalignment determination processing Also, the procedure of the size determination process and the contents thereof can be variously modified and implemented without departing from the gist of the present invention.

  In short, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in each embodiment. Furthermore, you may combine suitably the component covering different embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows 1st Embodiment of the disaster prevention monitoring system concerning this invention. It is a figure which shows the structure of the disaster prevention equipment of the system shown in FIG. An example of the marker attachment structure in the disaster prevention facility shown in FIG. 2 is shown. It is a block diagram which shows the structure of the surveillance camera and camera server which are installed in the disaster prevention equipment shown in FIG. It is a block diagram which shows the function structure of the server apparatus in the system shown in FIG. 6 is a flowchart showing a control camera and a camera server shown in FIG. 4 and a control procedure by the server device shown in FIG. 6 is a flowchart illustrating a control procedure and a second half of control contents by the monitoring camera and the camera server shown in FIG. 4 and the server device shown in FIG. 5. It is a flowchart which shows the setting control procedure and control content of the marker determination reference position and the reference range of the marker size. It is a figure for using for description of position shift judgment processing of a marker image. It is a figure for using for description of position shift judgment processing of a marker image. It is a figure for using for description of position shift judgment processing of a marker image. It is a figure for using for description of the size determination process of a marker image. It is a figure which shows the structure of the disaster prevention equipment used with the disaster prevention monitoring system concerning 2nd Embodiment of this invention. It is a block diagram which shows the structure of the surveillance camera, camera server, and sensor unit which are installed in the disaster prevention facility shown in FIG. It is a block diagram which shows the function structure of the server apparatus used with the disaster prevention monitoring system concerning 2nd Embodiment of this invention. It is a figure which shows an example of a tolerance information selection table structure provided in the server apparatus shown in FIG. It is a flowchart which shows the first half part of the control procedure and control content by the monitoring camera and camera server shown in FIG. 14, and the server apparatus shown in FIG. It is a flowchart which shows the latter half part of the control procedure and control content by the surveillance camera and camera server shown in FIG. 14, and the server apparatus shown in FIG.

Explanation of symbols

  BS1 to BSn ... Disaster prevention equipment, CS ... Monitoring center, SV ... Server device, NW ... Communication network, CM ... Surveillance camera, RS ... Alarm device, CSV ... Camera server, SU ... Sensor unit, M1-M4 ... Marker, 1a, DESCRIPTION OF SYMBOLS 1b ... 1st structure, 2a, 2b ... 2nd structure, 11 ... Camera body, 12 ... Camera drive part, 13 ... Communication I / F of camera server, 14 ... Control part of camera server, 21 ... CPU , 22 ... bus, 23 ... program memory, 24 ... first monitoring processing program, 25 ... second monitoring processing program, 26 ... determination result output control program, 27 ... data memory, 28 ... communication I / F of server device , 29 ... Input / output I / F, 30 ... Input device, 31 ... Display device, 251 ... Camera imaging control program, 252 ... Marker position deviation determination program, 2 3 ... marker size judgment program, 254 ... abnormality determining program, 255 ... tolerance information correction program 271 ... reference information storage unit, 272 ... tolerance information storage unit, 273 ... tolerance information selection table.

Claims (9)

A disaster prevention monitoring system comprising a disaster prevention facility installed at a place where a monitoring object can be monitored, and a monitoring center connected to the disaster prevention facility via a communication network,
The disaster prevention equipment
A marker fixedly installed in the first structure;
First image data that is installed in a second structure different from the first structure, images the monitoring object and the marker, and includes an image of the monitoring object, and an image of the marker A surveillance camera that outputs second image data including:
Transmission means for transmitting the first and second image data output from the monitoring camera to the monitoring center via the communication network;
The monitoring center is
Receiving means for receiving the first and second image data transmitted from the disaster prevention facility via the communication network;
First monitoring processing means for detecting a change in the state of the monitoring object based on the received first image data;
The state of the marker image included in the received second image data is compared with reference information representing the initial installation state of the marker stored in advance, and the first structure is based on the comparison result. Second monitoring processing means for determining the presence or absence of displacement of the second structure relative to
A disaster prevention monitoring system comprising: an output unit that outputs a determination result of the presence or absence of displacement of the second structure. The second monitoring processing means of the monitoring center includes:
Storage means for storing first tolerance information representing an allowable range of displacement of the marker image;
Whether the amount of positional deviation between the position of the marker image in the received second image data and the reference position of the marker image indicated by the reference information exceeds the range of the first tolerance information. First determination means for determining whether or not
Means for determining that displacement has occurred in the second structure when it is determined by the first determination means that the amount of positional deviation of the marker image exceeds the range of the first tolerance information. The disaster prevention monitoring system according to claim 1. The second monitoring processing means of the monitoring center includes:
Means for storing second tolerance information representing an allowable range of the size of the marker image;
When the first determination unit determines that the amount of positional deviation of the marker image is within the range of the first tolerance information, the size of the marker image included in the received second image data is the second value. Second determination means for determining whether or not the tolerance information range is exceeded,
Means for determining that a displacement has occurred in the second structure when it is determined by the second determination means that the size of the marker image exceeds the range of the second tolerance information; The disaster prevention monitoring system according to claim 2, further comprising: The disaster prevention equipment
A sensor that measures a change in ambient environmental conditions that cause a positional shift or a change in size of the marker image;
Means for transmitting information representing a change in environmental conditions measured by the sensor to the monitoring center via the communication network;
The second monitoring processing means of the monitoring center includes:
Means for receiving information representing a change in the environmental condition transmitted from the disaster prevention facility;
4. The apparatus according to claim 2, further comprising: means for correcting the first tolerance information or the second tolerance information in accordance with a value indicated by the received information indicating the change in the environmental condition. The disaster prevention monitoring system described. The disaster prevention equipment
A sensor that measures a change in ambient environmental conditions that cause a positional shift or a change in size of the marker image;
Means for transmitting information representing a change in environmental conditions measured by the sensor to the monitoring center via the communication network;
The second monitoring processing means of the monitoring center includes:
Means for receiving information representing a change in the environmental condition transmitted from the disaster prevention facility;
Means for determining whether or not a value indicated by the received information indicating the change in environmental condition is equal to or less than a predetermined threshold;
The value indicated by the information representing the change in the environmental condition is determined by the first or second determination means during a period that is equal to or less than the threshold value, and the first and second values are determined during other periods. The disaster prevention monitoring system according to claim 2, further comprising means for stopping determination processing by the determination means. The surveillance camera of the disaster prevention facility further includes means for imaging a position-invariant reference object existing at a position that can be seen from the monitoring place, and outputting third image data including an image of the position-invariant reference object,
The transmission means of the disaster prevention facility comprises means for transmitting the third image data output from the monitoring camera to the monitoring center via the communication network,
The monitoring center receiving means further comprises means for receiving third image data transmitted from the disaster prevention equipment via the communication network,
The second monitoring processing means of the monitoring center includes:
When the first determination means determines that the amount of positional deviation of the marker image is within the range of the first tolerance information, the received third image data is stored at the position of the reference object stored in advance. 3. The disaster prevention system according to claim 2 , further comprising means for comparing with corresponding reference image data and determining presence / absence of displacement of the first and second structures relative to the ground based on the comparison result. Monitoring system. The monitoring center is
Means for receiving a registration request for the reference image data;
Means for remotely adjusting the imaging direction of the surveillance camera via the communication network in response to the registration request;
The disaster prevention monitoring system according to claim 6 , further comprising means for storing, as the reference image data, third image data received from a disaster prevention facility in a state where the imaging direction is adjusted. The disaster prevention equipment installed in a place where the monitoring object can be monitored and the first and second image data transmitted from the disaster prevention equipment via the communication network are received, and the received first image data is received. A change in the state of the monitoring object is detected based on the comparison, and the state of the marker image included in the received second image data is compared with reference information indicating the initial installation state of the marker stored in advance. The disaster prevention equipment used in a system comprising a monitoring center for determining the presence or absence of displacement of the second structure relative to the first structure based on the comparison result ,
A stationary markers in the first structure,
First image data that is installed in a second structure different from the first structure, images the monitoring object and the marker, and includes an image of the monitoring object, and an image of the marker A surveillance camera that outputs second image data including:
A disaster prevention facility comprising: transmission means for transmitting the first and second image data output from the monitoring camera to the monitoring center via the communication network. A monitoring object is installed at a place where the monitoring object can be monitored, a marker is fixedly installed on the first structure, and a monitoring camera is installed on a second structure different from the first structure. For the disaster prevention facility having a function of imaging the monitoring object and the marker with a camera and transmitting first image data including an image of the monitoring object and second image data including an image of the marker A monitoring center connected via a communication network,
Receiving means for receiving the first and second image data transmitted from the disaster prevention facility via the communication network;
First monitoring processing means for detecting a change in the state of the monitoring object based on the received first image data;
The state of the marker image included in the received second image data is compared with reference information representing the initial installation state of the marker stored in advance, and the first structure is based on the comparison result. Second monitoring processing means for determining the presence or absence of displacement of the second structure relative to
The monitoring center comprising: output means for outputting a determination result of the presence or absence of displacement of the second structure.

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