JP2016057102A - Monitoring device, monitoring system, and monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique which suppresses power consumption and which can accurately monitor states related to damage of building structures such as bridges and buildings.SOLUTION: State detection sensor control circuits 12, 13, 14 process sensing signals inputted by state detection sensors 3 installed in a building structure, and acquire sensing data. A storage section 16 stores sensing conditions for specifying sensing timing to perform sensing in the state detection sensors 3. A power supply section 18 temporarily supplies power to the state detection sensors 3 at the sensing timing specified by the sensing conditions stored by the storage section 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technique for monitoring a state of damage to a building such as a bridge or a building.

  Conventionally, various types of buildings such as bridges and buildings use temperature sensors, humidity sensors, acceleration sensors, displacement sensors, infrared image sensors, etc. Such a state) is monitored.

  For example, Patent Document 1 discloses a technique for determining whether a building is damaged using sensing data obtained by processing a sensing signal input from an acceleration sensor attached to the building.

  In addition, Patent Document 2 describes the use of sensing data obtained by processing sensing signals input from a plurality of sensors such as an FBG (Fiber Bragg Grating) inclinometer, FBG displacement meter, and FBG thermometer. Techniques for diagnosing conditions are disclosed.

  The various sensors are attached to a symmetrical building that monitors the condition. On the other hand, an information processing apparatus that diagnoses the state of a building based on sensing data of various sensors is installed in a center or the like. For this reason, a monitoring device that processes sensing signals input from various sensors to acquire sensing data and transmits (inputs) the acquired sensing data of the various sensors to the information processing device by wireless communication is attached to the building. ing.

Japanese Patent Laid-Open No. 2008-2986 JP2013-40774A

  As described above, since the monitoring device is used by being attached to a building, there is a configuration in which a battery is used as a power source instead of a configuration connected to a commercial power source. A monitoring device with a battery-powered configuration is connected to the monitoring device, for example, in an environment that is not drawn around the building monitored by the transmission line, or around the building monitored by the transmission line. It can also be used in situations where the pull-in of commercial power is limited for some reason. The monitoring device supplies power not only to each part of the device body but also to various connected sensors.

  On the other hand, since the monitoring device is attached to the building to be monitored as described above, the battery replacement work that accompanies battery exhaustion is often a special work such as an aerial work. For this reason, it is desired to suppress the power consumption of the monitoring device and reduce the frequency of battery replacement work.

  Note that it is desired to suppress power consumption even in a monitoring device configured to be connected to a commercial power source.

  An object of the present invention is to provide a technique capable of suppressing power consumption and appropriately monitoring a state of damage to a building such as a bridge or a building.

  In order to achieve the above object, the monitoring device of the present invention is configured as follows.

  The state detection sensor control unit can be connected to a state detection sensor that is attached to the building and senses the state of the building, and acquires sensing data by processing the sensing signal input from the state detection sensor. A memory | storage part memorize | stores the state sensing conditions for prescribing | regulating the state sensing timing which performs sensing in a state detection sensor. Then, the power supply unit temporarily supplies power to the state detection sensor when the state sensing timing specified by the state sensing condition stored in the storage unit is reached.

  In this configuration, power is not always supplied to the state detection sensor, but power is temporarily supplied to the state detection sensor at the state sensing timing defined by the state sensing condition. Thereby, since the power consumed by the state detection sensor is suppressed, the power consumption of the monitoring apparatus main body is suppressed. The state detection sensor is an acceleration sensor that detects vibration applied to the shaking of the building, a displacement sensor, and an infrared image sensor that picks up an infrared image of the building. Moreover, the number of state detection sensors connected to the monitoring apparatus main body is not limited to one, and may be plural.

  The state detection sensor control unit is also preferably configured to temporarily supply power at the state sensing timing defined by the state sensing conditions.

  In particular, in a monitoring apparatus configured to use a battery as a power source, the frequency of battery replacement due to battery exhaustion can be suppressed, so that the operation cost can be reduced.

  In addition, in a building such as a bridge or a building, unless a large external force (for example, an external force due to an earthquake) is applied, the state of damage or the like does not change abruptly. Therefore, it is possible to appropriately monitor a state related to damage to a building such as a bridge or a building without always performing sensing by the state detection sensor.

  For example, because a building expands and contracts due to changes in temperature (ambient temperature, changes in the surface of the building, and internal temperature), the state of damage may change when the temperature changes to some extent. High nature. Therefore, by regulating the state sensing timing for sensing in the state detection sensor according to the temperature change, it is possible to appropriately monitor the change in the state related to damage to the building while effectively suppressing power consumption. It can be carried out.

  In addition, depending on the temperature difference, the characteristic amount for determining the state of the building may hardly appear in the sensing data acquired by processing the sensing signal of the state detection sensor, or may appear significantly. That is, when the temperature changes to some extent, sensing is performed by the state detection sensor, so that the feature amount for determining the state of the building can be appropriately acquired.

  The temperature may be measured using a temperature sensor. Further, the temperature sensing by the temperature sensor may be performed constantly, but it is preferable to perform the sensing periodically at a predetermined time or the like from the viewpoint of reducing power consumption.

  The temperature sensor may be attached to the building so as to measure the air temperature, or may be attached to the building so as to measure the temperature of the surface of the building or the inside. The temperature of the surface and the interior of the building changes according to the change in the ambient temperature around the building.

  In addition, the power supply unit is configured to disconnect the power supplied to the state detection sensor based on the sensing data acquired by processing the sensing signal input from the state detection sensor by the state detection sensor control unit. It is good. In this way, when the magnitude of the external force applied to the building fluctuates and the building vibrates, sensing data sensed by the state detection sensor can be acquired. When the building is a railway bridge, the magnitude of the external force applied when the train enters and passes is changed. In addition, when the building is a viaduct on an automobile-only road, the magnitude of the external force applied when the vehicle enters and passes is changed. Thereby, monitoring of the state concerning the damage of a building, etc. can be performed more appropriately.

  In addition, the monitoring device may be configured to define the time at which sensing is performed by the state detection sensor.

  Furthermore, the monitoring device may be configured to include a wireless communication unit that transmits sensing data acquired by the state detection sensor control unit to the host device.

  According to the present invention, power consumption can be suppressed and monitoring of a state related to damage to a building such as a bridge or a building can be appropriately performed.

It is the schematic which shows the structure of a monitoring system. It is a block diagram which shows the structure of the principal part of a monitoring apparatus. It is a block diagram which shows the structure of the principal part of a diagnostic apparatus. It is a flowchart which shows operation | movement of a monitoring apparatus. It is a flowchart which shows a 1st sensing process. It is a flowchart which shows the execution determination process of a 2nd sensing process. It is a flowchart which shows a 2nd sensing process. It is a figure explaining the execution timing of a 2nd sensing process. It is a flowchart which shows a transmission process. It is a flowchart which shows a reception process. It is a flowchart which shows a diagnostic process. It is a flowchart which shows the sensing process in the monitoring apparatus concerning another example.

  Hereinafter, a monitor rinsing system according to an embodiment of the present invention will be described.

  FIG. 1 is a schematic diagram showing a configuration of a monitoring system according to this example. This monitoring system diagnoses the state of a bridge on which a train travels (a so-called railway bridge). The state of the railway bridge is the degree of damage due to erosion or corrosion, in other words, the degree of soundness. The monitoring system according to this example includes a monitoring device 1, a temperature sensor 2, a state detection sensor 3, and a diagnostic device 4.

  The monitoring device 1 is attached to a plurality of locations such as piers and bridges of a railway bridge. That is, the monitoring system according to this example includes a plurality of monitoring devices 1. In FIG. 1, only one monitoring device 1 attached to the pier is illustrated.

  A temperature sensor 2 and one or a plurality of state detection sensors 3 are connected to the monitoring device 1 by a cable. The temperature sensor 2 and the state detection sensor 3 may be attached to a pier or a bridge of a railway bridge, or may be attached to a housing of the monitoring device 1 attached to the railway bridge. The attachment positions of the temperature sensor 2 and the state detection sensor 3 are in the vicinity of the attachment position of the connected monitoring device 1.

  The temperature sensor 2 may be attached so as to sense the air temperature around the attachment position, or may be attached so as to sense the surface temperature of the railway bridge and the internal temperature of the railway bridge. The state detection sensor 3 is, for example, a humidity sensor, an acceleration sensor, a displacement sensor, or an infrared image sensor. The humidity sensor is attached so as to sense the humidity around the attachment position. The acceleration sensor is attached so as to sense the acceleration of the vibration of the railway bridge at the attachment position. The displacement sensor is attached so as to sense the amount of displacement of the railway bridge at the attachment position. The infrared image sensor is attached so as to capture an infrared image of a sensing area of a predetermined railway bridge.

  Note that the state detection sensor 3 connected to each monitoring device 1 is not limited to the type of sensor described above, and other types of sensors may be used.

  The diagnostic device 4 is an information processing device composed of a personal computer or the like, and is installed in a management office, a center, or the like. The monitoring device 1 and the diagnosis device 4 are configured to perform wireless communication via a wireless network.

  FIG. 2 is a block diagram illustrating a configuration of a main part of the monitoring apparatus. The monitoring device 1 includes a control unit 10, a temperature sensor control circuit 11, state detection sensor control circuits 12, 13, 14, a timer 15, a storage unit 16, a wireless communication unit 17, and a power supply unit 18. ing.

  The control unit 10 controls the operation of each part of the monitoring apparatus 1 main body.

  The temperature sensor 2 is connected to the temperature sensor control circuit 11. The temperature sensor control circuit 11 processes a detection signal (sensing signal input from the temperature sensor 2) for supplying power to the connected temperature sensor 2 and a sensing signal (measured). A processing circuit for obtaining a temperature). The temperature sensor control circuit 11 corresponds to the temperature sensor control unit referred to in the present invention.

  The state detection sensor 3 is connected to the state detection sensor control circuits 12, 13, and 14. The state detection sensor control circuits 12, 13, and 14 are a power supply circuit that supplies power to the connected state detection sensor 3 and a detection signal of the state detection sensor 3 (sensing signal input from the state detection sensor 3). A processing circuit for processing and obtaining sensing data is provided. As described above, the state detection sensor 3 is not a specific type of sensor, but is, for example, a humidity sensor, an acceleration sensor, a displacement sensor, or an infrared image sensor. For this reason, the state detection sensor control circuits 12, 13, and 14 are not the same circuit but a circuit corresponding to the state detection sensor 3 to be connected. The state detection sensor control circuits 12, 13, and 14 acquire humidity, acceleration, displacement, an infrared image, and the like as sensing data according to the type of the state detection sensor 3 connected thereto. The state detection sensor control circuits 12, 13, and 14 correspond to the state detection sensor control unit referred to in the present invention.

  In this example, the monitoring device 1 including three state detection sensor control circuits 12, 13, and 14 is taken as an example, but the state detection sensor control circuits 12, 13, and 14 included in the monitoring device 1 are three. It does not have to be. That is, the monitoring device 1 only needs to include a state detection sensor control circuit corresponding to the state detection sensor 3 for each state detection sensor 3 to be connected.

  The timer 15 measures the current date and time.

  The storage unit 16 stores various setting parameters used during operation of the monitoring device 1 main body. The setting parameters include data relating to a first timing, a second timing, a transmission timing, a comparison temperature, a continuation count, a threshold temperature, a threshold count, and the like, which will be described later. The storage unit 16 also has a storage area for temporarily storing data generated during operation of the monitoring device 1 main body. The storage unit 16 temporarily stores sensing data acquired by processing the detection signals of the temperature sensor 2 and the state detection sensor 3.

  The wireless communication unit 17 controls wireless communication with the diagnostic device 4.

  The power supply unit 18 includes a battery 18a. The battery 18a is a drive power source for the monitoring apparatus 1 main body. The power supply unit 18 supplies power necessary for operation to each part of the monitoring apparatus 1 main body from the battery 18a. As described above, the temperature sensor control circuit 11 supplies power to the connected temperature sensor 2, and the state detection sensor control circuits 12, 13, and 14 are connected to the connected state detection sensor 3. Supply power. That is, power supply to the temperature sensor 2 and the state detection sensor 3 is also performed by the battery 18a.

  Further, in this example, during operation of the monitoring device 1 main body, the power supply unit 18 always supplies power to the control unit 10, the timer 15, and the storage unit 16 from the battery 18a. 11, the state detection sensor control circuits 12, 13, 14 and the wireless communication unit 17 are intermittently supplied with power from the battery 18a by the power supply unit 18 as necessary. Specifically, the power supply unit 18 turns on the power supply from the battery 18 a to the temperature sensor control circuit 11, the state detection sensor control circuits 12, 13, and 14 and the wireless communication unit 17 in accordance with an instruction from the control unit 10. / Turn off.

  In the monitoring device 1 according to this example, the battery 18a is the driving power source for the monitoring device 1, but the commercial power source may be the driving power source for the monitoring device 1.

  FIG. 3 is a block diagram illustrating a configuration of a main part of the diagnostic apparatus. The diagnostic device 4 includes a control unit 41, an operation unit 42, a display unit 43, a storage unit 44, and a wireless communication unit 45. The diagnostic device 4 is a general personal computer.

  The control unit 41 controls the operation of each part of the main body of the diagnostic device 4 and diagnoses the state of the railway bridge, which is a building, using the sensing data of the temperature sensor 2 and the state detection sensor 3.

  The operation unit 42 includes an input device such as a keyboard and a mouse, and accepts an operator's input operation to the diagnostic apparatus 4 main body.

  The display unit 43 includes a display, and displays a screen according to an input to the diagnostic device 4, displays a screen according to a processing result of a process executed by the diagnostic device 4 body, and the like.

  The storage unit 44 stores parameters used during operation of the main body of the diagnostic device 4 and sensing data of the temperature sensor 2 and the state detection sensor 3 transmitted from the monitoring device 1.

  The wireless communication unit 45 includes a wireless communication device and controls wireless communication with the monitoring device 1 attached to the railway bridge. The wireless communication unit 45 receives sensing data of the temperature sensor 2 and the state detection sensor 3 transmitted from the monitoring device 1.

  The diagnostic device 4 is connected to a commercial power source, and this commercial power source is a drive power source for the diagnostic device 4 main body.

  In a building such as a railway bridge, damage or the like does not change abruptly unless a large external force (for example, an external force due to an earthquake) is applied. Therefore, monitoring of a state related to damage to a building such as a bridge or a building can be properly performed without always performing sensing by the state detection sensor 3. Since a building expands and contracts due to a temperature change (change in temperature), there is a high possibility that the state of damage or the like changes when the temperature changes to some extent.

  In addition, depending on the temperature difference, the characteristic amount for determining the state of the building may hardly appear in the sensing data acquired by processing the detection signal of the state detection sensor 3 or may be noticeable. That is, when the temperature changes to some extent, the state detection sensor 3 performs sensing, whereby the feature amount for determining the state of the building can be appropriately acquired.

  Therefore, by regulating the state sensing timing to be sensed by the state detection sensor 3 according to the temperature change, it is possible to appropriately monitor the change in the state related to the damage of the building while effectively suppressing the power consumption. It can be carried out.

  Here, the first timing, the second timing, the transmission timing, the threshold temperature, the threshold count, the comparison temperature, and the continuation count that the monitoring device 1 stores in the storage unit 16 will be described.

  The first timing is a timing at which a first sensing process described later is performed. In the first sensing process, the connected temperature sensor 2, the state detection sensor 3, and the temperature sensor control circuit are configured to perform sensing in the connected temperature sensor 2 and the state detection sensor 3, and obtain sensing data. 11 and the state detection sensor control circuits 12, 13, 14 and so on. In this example, the first timing is set to 0:00 am.

  The second timing is a timing at which sensing is performed in the connected temperature sensor 2 to acquire sensing data, and corresponds to the temperature sensing timing referred to in the present invention. In this example, the second timing is set to 2:00 pm, which is a time zone in which the highest temperature during the day is likely to be observed.

  The first timing and the second timing described above are examples and do not have to be set at this time. The first timing and the second timing are once a day, but may be several times a day (2 to 3 times) or several days (2 to 3 days). It may be once. However, it is preferable that the first timing and the second timing have a frequency of at most three times a day in consideration of suppressing power consumption of the monitoring device 1. Moreover, it is preferable that the first timing and the second timing have a frequency of at least once every three days from the viewpoint of appropriately diagnosing the state of the railway bridge.

  The transmission timing is a time period in which the monitoring device 1 can perform wireless communication with the diagnostic device 4 via the wireless communication network. As described above, the monitoring system according to this example includes a plurality of monitoring devices 1 that perform wireless communication with the diagnostic device 4 via the wireless communication network. Further, the plurality of monitoring devices 1 perform wireless communication with the diagnostic device 4 using the same channel. Therefore, when a plurality of monitoring devices 1 perform wireless communication with the diagnostic device 4 at the same timing, a communication error due to data collision occurs. That is, by determining the transmission timing for each monitoring device 1, a plurality of monitoring devices 1 are prevented from performing wireless communication with the diagnostic device 4 at the same timing.

  The threshold temperature and the number of thresholds are parameters used for determining whether or not it is a timing for performing a second sensing process described later (corresponding to a state sensing timing in the present invention). That is, the threshold temperature and the number of thresholds are parameters related to the state sensing condition referred to in the present invention. The threshold temperature indicates the lower limit of the absolute value of the difference between the comparison temperature stored in the storage unit 16 at that time and the temperature sensed by the temperature sensor 2 at the second timing. In this example, the threshold temperature is 5 ° C. The threshold number indicates the lower limit of the continuous number in which the absolute value of the difference between the temperature sensed by the temperature sensor 2 at the second timing and the comparison temperature stored at that time is equal to or greater than the threshold temperature. In this example, the threshold count is 5.

  The threshold temperature is not limited to 5 ° C., and may be 3 ° C., 7 ° C., or the like. Further, the threshold number is not limited to 5, and may be 1 time, 3 times, 7 times, or the like.

  The comparison temperature is a temperature acquired by sensing of the temperature sensor 2 when the second sensing process was executed last time. The number of continuations is the number of continuations at which the absolute value of the difference between the temperature sensed by the temperature sensor 2 at the second timing and the comparison temperature stored at that time is equal to or greater than the threshold temperature.

  The operation of the monitoring system according to this example will be described below.

  FIG. 4 is a flowchart showing the operation of the monitoring apparatus. The monitoring device 1 waits for any of the first timing, the second timing, or the transmission timing stored in the storage unit 16 (s1, s2, s3). At the first timing, the monitoring device 1 executes a first sensing process described later (s4) and returns to s1. Further, at the second timing, the monitoring device 1 executes execution determination processing of second sensing processing described later (s5), and returns to s1. Moreover, the monitoring apparatus 1 will perform the transmission process mentioned later at the transmission timing (s6), and will return to s1.

  Here, the first sensing process according to s4, the execution determination process of the second sensing process according to s5, and the transmission process according to s6 will be described in detail.

  FIG. 5 is a flowchart showing the first sensing process. The monitoring device 1 starts driving the temperature sensor 2 and the state detection sensor 3 (s11). In s11, the power supply unit 18 starts supplying power to the temperature sensor control circuit 11 and the state detection sensor control circuits 12, 13, and 14. Thereby, the temperature sensor 2 and the state detection sensor 3 start sensing. However, the monitoring device 1 does not supply power to the state detection sensor control circuits 12, 13, and 14 to which the state detection sensor 3 is not connected at this time.

  The monitoring device 1 acquires sensing data from the temperature sensor 2 and the state detection sensor 3 (s12). In s12, the temperature sensor control circuit 11 processes the detection signal of the temperature sensor 2 that has started driving (the sensing signal input from the temperature sensor 2) to acquire sensing data. Further, the state detection sensor control circuits 12, 13, and 14 process the detection signal of the state detection sensor 3 that has started driving (the sensing signal input from the connected state detection sensor 3) to acquire sensing data. . The sensing data acquired in s12 is an instantaneous value after a predetermined time has elapsed (for example, after 1 second) after the temperature sensor 2 and the state detection sensor 3 are driven in s11. Thereby, sensing data when the operation state of the temperature sensor 2 and the state detection sensor 3 is stabilized is acquired.

  The monitoring device 1 associates the acquisition date with the sensing data acquired in s12 and stores it in the storage unit 16 (s13). In s13, the sensing data associated with the acquisition date and time is stored in the storage unit 16 as transmission data to the diagnostic device 4.

  In addition, the monitoring device 1 stops driving the temperature sensor 2 and the state detection sensor 3 started in s11 (s14), and ends this process. In s14, the power supply unit 18 stops power supply to the temperature sensor control circuit 11 and the state detection sensor control circuits 12, 13, and 14. Thereby, the temperature sensor 2 and the state detection sensor 3 stop sensing.

  As described above, the monitoring device 1 repeats the first sensing process periodically (every time the first timing is reached), so that these are detected by the detection signals of the temperature sensor 2 and the state detection sensor 3 connected thereto. It can be confirmed whether the temperature sensor 2 and the state detection sensor 3 are not damaged. Moreover, since it is the structure which does not always perform sensing by the temperature sensor 2 and the state detection sensor 3, but performs intermittently, the power consumption of the monitoring apparatus 1 main body is suppressed. When the temperature sensor 2 is not driven, the power supply to the temperature sensor control circuit 11 is stopped. When the state detection sensor 3 is not driven, the power supply to the state detection sensor control circuits 12, 13, and 14 is stopped. Therefore, useless power consumption in the main body of the monitoring device 1 can be suppressed. Therefore, the life of the battery 18a can be extended and the replacement frequency of the battery 18a can be reduced.

  Note that the sensing data obtained by the sensing of the temperature sensor 2 and the state detection sensor 3 acquired in the first sensing process may or may not be used for diagnosis of the state of the railway bridge described later.

  Next, the execution determination process of the 2nd sensing process concerning s5 is demonstrated. FIG. 6 is a flowchart showing the execution determination process of the second sensing process. The monitoring device 1 starts driving the temperature sensor 2 (s21). In s21, the power supply unit 18 starts supplying power to the temperature sensor control circuit 11. Thereby, the temperature sensor 2 starts sensing. However, at 21, the power supply unit 18 does not start power supply to the state detection sensor control circuits 12, 13, and 14 (maintains the stopped state). The monitoring device 1 acquires sensing data (temperature) sensed by the temperature sensor 2 that has started driving (s22), and calculates the absolute value of the difference from the comparison temperature stored in the storage unit 16 (s23). . In s22, the temperature sensor control circuit 11 processes the detection signal of the temperature sensor 2 that has started driving (the sensing signal input from the temperature sensor 2) to acquire sensing data. The comparison temperature is a temperature sensed by the temperature sensor 2 when the second sensing process was executed last time.

  The monitoring device 1 determines whether or not the temperature difference (absolute value) calculated in s23 is equal to or higher than the threshold temperature stored in the storage unit 16 (s24). When determining that the temperature is lower than the threshold temperature in s24, the monitoring device 1 resets the number of continuations stored in the storage unit 16 (sets the number of continuations to 0) (s25). The monitoring device 1 stops the driving of the temperature sensor 2 started in s21 (s26), and ends this process. In s26, the power supply unit 18 stops the power supply to the temperature sensor control circuit 11.

  When the monitoring device 1 determines in s24 that the temperature difference (absolute value) calculated in s23 is equal to or higher than the threshold temperature stored in the storage unit 16, the number of measurements stored in the storage unit 16 is counted by one. Up (s27). The monitoring device 1 determines whether or not the number of continuations stored in the storage unit 16 (the value incremented by 1 in s27) is equal to or greater than the threshold number stored in the storage unit 16 (s28). If the monitoring device 1 determines that the number of times is less than the threshold number in s28, the monitoring device 1 proceeds to s26, stops the driving of the temperature sensor 2 started in s21, and ends this processing.

  If the monitoring device 1 determines that the number of times is greater than or equal to the threshold number in s28, the monitoring device 1 executes the second sensing process shown in FIG. 7 (s29), and ends this process.

  FIG. 7 is a flowchart showing the second sensing process. The monitoring device 1 starts driving the state detection sensor 3 (s31). In s31, the power supply unit 18 starts power supply to the state detection sensor control circuits 12, 13, and 14. Thereby, the state detection sensor 3 starts sensing. However, in s31, the power supply unit 18 does not stop power supply to the temperature sensor control circuit 11 (maintains the power supply state).

  The monitoring device 1 waits for sensing timing (s32). In s32, it waits for the detection signal of the predetermined specific state detection sensor 3 to fluctuate greatly. That is, in s32, it waits for the timing when the train enters the railway bridge. The specific state detection sensor 3 may be an acceleration sensor or a displacement sensor. That is, any sensor may be used as long as it can detect that the train has entered the railway bridge.

  If the monitoring device 1 determines that it is the sensing timing in s32, it acquires sensing data by each state detection sensor 3 (s33). In s33, the state detection sensor control circuits 12, 13, and 14 process the detection signal of the connected state detection sensor 3 (the sensing signal input from the connected state detection sensor 3) to obtain sensing data. To do. Thus, in s33, the sensing data sensed by the state detection sensor 3 is acquired when the train is traveling on the railway bridge. In addition, the sensing data acquired in s33 is not instantaneous values but continuous data having a certain time width. This time width may be the time from when the sensing timing is determined at s32 until the train finishes passing through the railway bridge, or until the predetermined time elapses after the sensing timing is determined at s32. It's also good time. Whether or not the train has passed the railway bridge can be determined from the fluctuation of the detection signal of the specific state detection sensor 3.

  The monitoring device 1 associates the acquisition date with the sensing data acquired at s33 and the sensing data (temperature data) acquired by the current sensing by the temperature sensor 2 at s22 described above, and stores it in the storage unit 16 (s34). In s34, as in the case of s13 described above, sensing data associated with the acquisition date is stored in the storage unit 16 as transmission data to the diagnostic device 4.

  The monitoring device 1 updates the comparison temperature stored in the storage unit 16 to the temperature acquired by sensing by the current temperature sensor 2 in s22 described above (s36), and the monitoring device 1 stores the comparison temperature in the storage unit 16. The stored number of continuations is reset (s37), and the second sensing process is terminated. The process concerning s34-s37 is not restricted to the above-mentioned order, You may perform in what kind of order.

  Thus, in the second sensing process, sensing data obtained by sensing the state of the railway bridge with the state detection sensor 3 when the train is running on the railway bridge is acquired.

  Moreover, this 2nd sensing process is performed at the timing when the surrounding temperature of a railway bridge changed more than threshold temperature from the time of last execution, as shown in FIG. FIG. 8 illustrates a case where the threshold temperature is set to 5 ° C. As described above, the second sensing process regulates the execution timing in accordance with the change in the temperature. Therefore, the monitoring related to the change in the state of damage to the building or the like while effectively suppressing the power consumption. Can be performed properly.

  Note that, as described above, the second sensing process is executed when the absolute value of the temperature difference between the temperature sensed by the temperature sensor 2 and the comparison temperature is equal to or higher than the threshold temperature, and continues for the threshold number of times or more. This is not the case when the absolute value of the temperature difference between the temperature sensed by the temperature sensor 2 and the comparison temperature is greater than the threshold temperature. That is, the execution timing of the second sensing process shown in FIG. 8 is not the time when the absolute value of the temperature difference between the temperature sensed by the temperature sensor 2 and the comparison temperature is equal to or higher than the threshold temperature, but the temperature sensor 2. When the absolute value of the temperature difference between the temperature sensed in step 1 and the comparison temperature is equal to or greater than the threshold temperature, it is equal to or greater than the threshold number of times.

  Next, the transmission process concerning s6 is demonstrated. FIG. 9 is a flowchart showing the transmission process. The monitoring device 1 determines whether transmission data is stored in the storage unit 16. The monitoring device 1 stores the transmission data in the storage unit 16 at s13 and s34 described above.

  If the monitoring device 1 determines that the transmission data is not stored in the storage unit 16 in s41, the monitoring process 1 ends.

  When determining that the transmission data is stored in s16, the monitoring device 1 starts supplying power to the wireless communication unit 17 and drives the wireless communication unit 17 (s42). The monitoring device 1 performs wireless communication with the diagnostic device 4 via the wireless network, and transmits the transmission data stored in the storage unit 16 to the diagnostic device 4 (s43).

  When the wireless communication related to s43 ends, the monitoring device 1 stops driving the wireless communication unit 17 (s44). That is, in s44, power supply from the power supply unit 18 to the wireless communication unit 17 is stopped. The monitoring device 1 deletes the transmission data stored in the storage unit 16 and ends this process.

  The monitoring device 1 drives the wireless communication unit 17 in s44 when the wireless communication related to s43 cannot be properly executed (that is, when a communication error occurs with the diagnostic device 4). However, the transmission data stored in the storage unit 16 is not erased in s45. Therefore, when the monitoring apparatus 1 cannot properly execute the wireless communication related to s43 and cannot transmit the transmission data to the diagnosis apparatus 4, the monitoring apparatus 1 diagnoses the transmission data when it is determined that the next transmission timing is determined in s3. The wireless communication to be transmitted to the device 4 is retried.

  As described above, the monitoring device 1 is configured to drive the wireless communication unit 17 when transmitting sensing data (transmission data) sensed by the temperature sensor 2 and the state detection sensor 3 to the diagnostic device 4. Therefore, power consumption in the wireless communication unit 17 can be reduced.

  FIG. 10 is a flowchart showing the reception process of the diagnostic device. When receiving the transmission data transmitted from any of the monitoring devices 1 by the wireless communication unit 45, the diagnostic device 4 stores the received transmission data in the storage unit 44 (s51, 52). The diagnosis device 4 stores the transmission data transmitted from the monitoring device 1 in an accumulative manner for each monitoring device 1 by constantly repeating this reception process.

  FIG. 11 is a flowchart showing the diagnostic processing of the diagnostic apparatus. The diagnostic device 4 reads out the sensing data stored in the storage unit 44 with this diagnostic processing (s61), and diagnoses the railway bridge related to damage or the like (s62). In s62, for each monitoring device 1 that transmits sensing data, the sensing data sensed by each state detection sensor 3 connected to the monitoring device 1 is analyzed, and a deviation from an appropriate state is calculated. This deviation is calculated by a function stored in advance for each state detection sensor 3. The input variables of this function are a value and an appropriate value for sensing data sensed by the state detection sensor 3. Then, the diagnostic device 4 estimates the degree of damage or the like of the railway bridge from the calculated deviation magnitude.

  The diagnosis device 4 outputs the diagnosis result of s62 (s63) and ends this process.

  This diagnostic process may be performed when sensing data related to the second sensing process is received from the monitoring device 1.

  In the above example, the first sensing process is repeated every fixed period. However, either the first sensing process or the second sensing process may be performed every fixed period. Specifically, as shown in FIG. 12, s26 shown in FIG. 6 may be replaced with the processing of s71 to s74. s71 is a process for driving the state detection sensor 3, and s72 to s74 are processes similar to s12 to s14 shown in FIG.

  Further, the sensing process shown in FIG. 12 may be performed every time the first timing described above is reached. In this case, the process concerning s2 and s5 becomes unnecessary.

  Further, in the above example, the second sensing process is executed when the absolute value of the temperature difference between the temperature sensed by the temperature sensor 2 and the comparison temperature is equal to or higher than the threshold temperature, but continues for the threshold number of times or more. However, for example, it may be configured to be executed every time a predetermined period such as 30 days or 40 days elapses. In this way, the frequency of driving the temperature sensor 2 can be reduced, and the power consumption of the monitoring device 1 can be further suppressed.

  In addition, the wireless communication unit 17 may be constantly supplied with power so that notification can be made from the diagnostic device 4 side. For example, the above-described threshold temperature and the number of thresholds may be notified from the diagnostic device 4 to the monitoring device 1. In this way, it is possible to easily change the threshold temperature and the threshold number of times.

  In the above description, the present invention has been described by taking the monitoring device 1 for monitoring the state of the railway bridge as an example, but it is also possible to monitor the state of other structures such as viaducts, pedestrian bridges, and buildings. .

DESCRIPTION OF SYMBOLS 1 ... Monitoring apparatus 2 ... Temperature sensor 3 ... State detection sensor 4 ... Diagnosis apparatus 10 ... Control part 11 ... Temperature sensor control circuit 12 ... State detection sensor control circuit 15 ... Timer 16 ... Memory | storage part 17 ... Wireless communication part 18 ... Power supply part 18a ... battery 41 ... control unit 42 ... operation unit 43 ... display unit 44 ... storage unit 45 ... wireless communication unit

Claims (10)

A state detection sensor that is attached to a building and senses the state of the building is connectable, a state detection sensor control unit that acquires sensing data by processing a sensing signal input from the state detection sensor, and
A storage unit for storing state sensing conditions for defining state sensing timing for sensing in the state detection sensor;
A monitoring device comprising: a power supply unit that temporarily supplies power to the state detection sensor at the state sensing timing defined by the state sensing conditions stored in the storage unit. A temperature sensor that is attached to the building and senses temperature is connectable, and includes a temperature sensor control unit that acquires sensing data by processing a sensing signal input from the temperature sensor,
The monitoring device according to claim 1, wherein the storage unit stores the state sensing condition for defining the state sensing timing based on a change in temperature sensed by the temperature sensor. The storage unit stores temperature sensing conditions for defining temperature sensing timing for sensing in the temperature sensor,
The monitoring device according to claim 2, wherein the power supply unit temporarily supplies power to the temperature sensor at the temperature sensing timing defined by the temperature sensing condition stored in the storage unit.   The power supply unit disconnects power supplied to the state detection sensor based on sensing data acquired by processing the sensing signal input from the state detection sensor by the state detection sensor control unit. The monitoring apparatus in any one of Claims 1-3.   The power supply unit temporarily supplies power to the state detection sensor and the state detection sensor control unit at the state sensing timing defined by the state sensing condition stored in the storage unit. Item 5. The monitoring device according to any one of Items 1 to 4.   The monitoring device according to claim 1, wherein the power supply unit includes a battery, and supplies power to the state detection sensor using the battery.   The monitoring device according to claim 1, further comprising a wireless communication unit that transmits sensing data acquired by the state detection sensor control unit to a host device.   The monitoring device according to claim 1, wherein the storage unit stores the state sensing condition indicating a date and time that is the state sensing timing. A monitoring system in which a monitoring device and a diagnostic device are connected via a wireless network so that wireless communication is possible,
The monitoring device includes:
A state detection sensor that is attached to a building and senses the state of the building is connectable, a state detection sensor control unit that acquires sensing data by processing a sensing signal input from the state detection sensor, and
A storage unit for storing state sensing conditions for defining state sensing timing for sensing in the state detection sensor;
A power supply unit that temporarily supplies power to the state detection sensor at the state sensing timing defined by the state sensing conditions stored in the storage unit;
Monitoring system. A first step of connecting a state detection sensor attached to a building to sense the state of the building and connecting the sensing signal input from the state detection sensor to obtain sensing data;
A monitoring method comprising: a second step of temporarily supplying power from a power supply unit to the state detection sensor at a state sensing timing defined by a state sensing condition stored in a storage unit.

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