JP6891986B1 - Measurement timing control device, measurement timing control method, measurement timing control program and monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the operation timing of each sensor device arranged in a structure and reduce power consumption because the measurement is performed according to the deteriorated state of the structure. A measurement timing control device of the present invention evaluates an evaluation value that evaluates the degree of abnormality that may occur in a monitoring target based on measurement values acquired from a plurality of detection devices provided in one or a plurality of monitoring targets. Abnormality determination means for determination, measurement cycle determination means for determining the measurement cycle time of each detection device according to the evaluation value, and measurement cycle time are set for each detection device, and each detection device is started to operate the measurement. It is characterized in that it is provided with a measurement timing setting means for causing each detection device to set the measurement timing to be performed. [Selection diagram] Fig. 1

Description

The present invention relates to a measurement timing control device, a measurement timing control method, a measurement timing control program, and a monitoring device, and can be applied to, for example, a device and a system for controlling the measurement timing of each sensor fixedly installed in a structure.

For example, there is a technique described in Patent Document 1 as a non-contact monitoring of an abnormality of a structure such as a bridge. The technique described in Patent Document 1 discloses that sensors for acquiring vibration data are arranged at each of a plurality of positions of a structure to detect an abnormality of the structure based on the vibration data of the plurality of positions. ..

International Publication No. WO2017 / 064854

However, although electric power is required to operate the sensor, it is not easy to secure a power source. For example, in the case of abnormal monitoring of a structure such as a bridge, the sensor may be placed behind the floor plate of the bridge. Maintenance such as battery replacement is not easy. Therefore, it is required to suppress the power consumption related to the sensor operation.

Moreover, since the structure deteriorates over a long period of time, there is not much need for constant monitoring. On the other hand, after anomaly detection, it is necessary to increase the monitoring frequency, and it is desirable to rationally monitor the structure.

Therefore, in the present invention, instead of setting a preset measurement schedule in the sensor device, measurement is performed according to the deterioration state of the structure. Therefore, the operation timing of each sensor device (detection device) arranged in the structure is performed. Is intended to be able to adjust and reduce power consumption.

In order to solve such a problem, the first measurement timing control device of the present invention is provided in one or a plurality of monitoring targets, and performs measurement based on an operation schedule for periodically transitioning an operating state or a hibernation state. An abnormality determination means for determining an evaluation value that evaluates the degree of abnormality of the measurement value from each detection device based on the measurement value acquired from a plurality of detection devices and the past measurement history information for each detection device, and evaluation. depending on the value, the measurement period determining means for each sensing device operation schedule change the measurement cycle time indicating the distance to be measured, measurement of the measurement cycle time is changed by measuring the period determining means to set to each sensing device It is characterized by being provided with a timing setting means.

The second measurement timing control program of the present invention is from a plurality of detection devices in which a computer is provided in one or a plurality of monitoring targets and measures are performed based on an operation schedule for periodically transitioning an operating state or a hibernation state. Based on the acquired measurement value and the past measurement history information for each detection device, an abnormality determination means for determining the evaluation value that evaluates the degree of abnormality of the measurement value from each detection device , and according to the evaluation value, and measuring the period determination means for each sensing device operation schedule change the measurement cycle time indicating the interval for measuring the functional measurement cycle time changed by the measurement cycle determining means as a constant timing setting means measuring to set each sensing device It is characterized by letting it.

In the third measurement timing method of the present invention, a plurality of detection devices in which abnormality determination means are provided in one or a plurality of monitoring targets and measurement is performed based on an operation schedule for periodically transitioning an operating state or a hibernation state. Based on the measurement value acquired from the above and the past measurement history information for each detection device, the evaluation value that evaluates the degree of abnormality of the measurement value from each detection device is determined, and the measurement cycle determination means is used as the evaluation value. characterized response, changes the measurement cycle time indicating the interval at which each detection device is measured by operating the schedule, the measurement timing setting means, that the measurement cycle time is changed by measuring the period determining means to set to each sensing device And.

Fourth monitoring device of the present invention, 1 or provided at a plurality of monitoring target, the measurement values obtained from a plurality of detection apparatus for performing measurement on the basis of the operating state or resting state to periodically transition is to operate schedule , Anomaly determination means for determining the evaluation value that evaluates the degree of abnormality of the measured value from each detection device based on the past measurement history information for each detection device, and each detection in the operation schedule according to the evaluation value. and wherein the measurement period determination means that the device changes the measurement cycle time indicating the interval of measuring, the measuring cycle time has been changed by the measurement interval determining means comprise a constant timing setting means measuring to set each sensing device To do.

According to the present invention, since the measurement is performed according to the deterioration state of the structure, the operation timing of each sensor device (detection device) arranged in the structure can be adjusted, and the power consumption can be reduced.

It is an internal block diagram which shows the internal structure of the monitoring device which concerns on embodiment. It is an overall configuration diagram which shows the overall configuration of the monitoring system which concerns on embodiment. It is an internal block diagram which shows the internal structure of the radio device which concerns on embodiment. It is a flowchart which shows the operation of the measurement timing control processing which concerns on embodiment. In the embodiment, it is explanatory drawing explaining the operation cycle which operates the acceleration sensor when the abnormality evaluation value is 0. In the embodiment, it is explanatory drawing explaining the operation cycle which operates an acceleration sensor in the case of an abnormality evaluation value 1. In the embodiment, it is explanatory drawing explaining the operation cycle which operates an acceleration sensor in the case of an abnormality evaluation value 2. In the embodiment, it is explanatory drawing explaining the operation cycle which operates an acceleration sensor in the case of an abnormality evaluation value 3.

(A) Basic Concept First, the basic concept of the measurement timing control device, the measurement timing control method, the measurement timing control program, and the monitoring device according to the present invention will be described.

For example, many attempts have been made to measure the soundness of structures by installing various sensor devices on structures such as bridges. In order to judge the soundness of a structure, it is necessary to apply a load to the structure. What is given as a load on a daily basis is the weight that accompanies the passage of vehicles and the like.

Electric power is required to operate the sensor device, but it is not easy to secure a power source outdoors such as a bridge. In addition, there are many places where devices with sensor devices (hereinafter, also referred to as "sensor devices") are installed, such as behind the floorboards of bridges, which cannot be reached by ordinary methods, and it is a reality that batteries are frequently replaced. Not the target. For example, it is difficult to constantly drive the sensor device even if a power generation function such as a solar cell is used.

In addition, the structure deteriorates over a long period of time, and there is not much need for constant monitoring. It is rational to perform operations such as intermittently monitoring the structure and increasing the frequency of monitoring when there is an abnormality.

Structures such as bridges are composed of multiple members such as floorboards and girders. In addition, it is empirically known that there are parts that are prone to deterioration. It is considered necessary to install multiple sensor devices for a single bridge in order to make accurate measurements. In addition, installing a plurality of sensor devices also has the effect of increasing the redundancy of the measuring device.

Furthermore, with regard to devices that operate on batteries, by alternately using a plurality of devices, it is possible to reduce the power consumption of each sensor and extend its life.

Due to these various advantages, installing multiple sensor devices in a single structure is valuable from various perspectives.

The operation scheduling of a plurality of sensor devices installed in a structure with a plurality of intentions as described above has not been studied so far.

Therefore, in the following, the operating time for each sensor device is automatically determined in order to perform measurement according to the deterioration state of the structure without explicitly setting the measurement operation schedule for each sensor device. Here are some ways you can do it.

(B) Main Embodiments In the following, embodiments of a measurement timing control device, a measurement timing control method, a measurement timing control program, and a monitoring device according to the present invention will be described in detail with reference to the drawings.

(B-1) Configuration of Embodiment [Overall configuration]
FIG. 2 is an overall configuration diagram showing an overall configuration of the monitoring system according to the embodiment.

In FIG. 2, the monitoring system 1 includes a master unit 20, a plurality of radios 10 (10-1 to 10-n) as slave units, and a monitoring device 30.

The monitoring system 1 installs a plurality of radios 10-1 to 10-n having sensors as monitoring targets, intermittently collects sensor data from each radio 10-1 to 10-n, and collects the sensors. Monitor the status and status of the monitored object using data.

In this embodiment, a case where the monitoring target of the monitoring system 1 is a “structure” is illustrated. The "structure" means a structure composed of a plurality of materials, members, etc., and whose weight is supported by a foundation or the like. Structures are major, such as concrete structures made of concrete structures such as airports, highways, skyscrapers, stations, harbors, and steel bridges, factories, and other steel structures. Includes steel structures and the like whose members are steel materials.

“Abnormality” of a structure refers to damage or deterioration typified by, for example, cracks, cracks, generation of free lime, and bolt dropout. A value indicating the degree of being affected by such an "abnormality" is inspected using a sensor installed in the structure. Specifically, sensing data is collected from each of a plurality of sensors installed in the structure, and statistical analysis is performed using the data of each sensor. Then, the statistical analysis result is compared with the latest measurement result (sensor data), and the comparison result and the threshold value are used for evaluation. As a result of the evaluation, it can be said that an abnormality has occurred when a result different from the statistical analysis result so far or a different result is obtained.

In FIG. 2, the radio 10 (10-1 to 10-n) and the master 20 form a sensor network SN. Generally, as the communication method of the sensor network SN, a low-speed wireless communication method typified by a specific low-power wireless method or the like can be applied. For example, a wireless network standard represented by IEEE802.11a / b / g / n or the like, or a wireless communication system such as IEEE802.154, Bluetooth (registered trademark) may be used. The sensor network SN is a communication method that is slower than the backbone network NT. A unique address (for example, MAC address, short address, IP address, etc.) is assigned to each of the radio 10 (10-1 to 10-n) and the master 20 on the network SN.

The network between the master unit 20 and the monitoring device 30 is the backbone network NT. The backbone network NT is, for example, Internet or Ethernet®. The backbone network NT may be a wireless line or a wired line.

The radio 10 mainly includes a sensor, a schedule determination means, and a communication means. Hereinafter, the radio 10 is also referred to as a detection device, a sensor device, or the like. The radio 10 determines the time at which the sensor is operated. The data measured by the radio 10 is transmitted to the master 20 via the sensor network SN. In this embodiment, it is assumed that the radio 10 is fixedly installed at each of a plurality of locations of a structure such as a bridge, for example.

The master unit 20 has a function of relaying data between the sensor network SN and the backbone network NT. When the master unit 20 receives data from each radio device 10, it transmits information including the data of each radio device 10 to the monitoring device 30. As a result, the sensor data can be given to the monitoring device 30.

The master unit 20 basically has the same configuration as the radio unit 10, and even if the monitoring device 30 has a relay function for relaying data from each radio unit 10 in addition to the configuration of the radio unit 10. good. Further, for example, the master unit 20 may have a configuration of a monitoring device 30 described later.

The monitoring device 30 collects information including sensor data from each radio device 10 via the master unit 20, and stores (accumulates and manages) each data. As a modification, the device of the master unit 20 and the monitoring device 30 may be integrated.

[Internal configuration of monitoring device]
FIG. 1 is an internal configuration diagram showing an internal configuration of the monitoring device 30 according to the embodiment.

In FIG. 1, the monitoring device 30 has a communication unit 301, a control unit 302, an abnormality determination unit 303, a measurement cycle determination unit 304, and a storage unit 305 as measurement timing control devices.

The communication unit 301 is a communication interface for connecting to the backbone network NT.

The control unit 302 is a device and a processing unit that control various functions of the monitoring device 30. The control unit 302 may be composed of, for example, a device having a CPU, ROM, RAM, EEPROM, an input / output interface, and the like. The processing may be realized by the CPU executing a processing program (for example, a measurement timing control program or the like) stored in the ROM.

The control unit 302 gives the data received from the plurality of radios 10-1 to 10-n to the abnormality determination unit 303 in order to perform the abnormality determination based on the data from each radio unit 10.

The abnormality determination unit 303 includes the past measurement result (value of normalized data based on the past measurement data value) and the latest measurement result (measurement) of the radio 10 stored in the storage unit 305 for each acceleration sensor 103. The evaluation value indicating the degree of abnormality is determined by comparing with the data value).

Here, various methods can be widely applied to the abnormality determination method. For example, the abnormality determination unit 303 derives normalized data from the past vibration data measured by the acceleration sensor 103 and stores it in the storage unit 305. The abnormality determination unit 303 derives a value indicating a correlation based on the normalized data of the past vibration data of the acceleration sensor 103 and the latest vibration data of the acceleration sensor 103. Then, the abnormality determination unit 303 may compare the value indicating the correlation with the threshold value to determine the evaluation value (abnormality degree) indicating the degree of abnormality. The abnormality determination method is not limited to the above-mentioned example.

Here, the degree of abnormality (hereinafter, also referred to as "abnormal evaluation value" or "evaluation value") refers to an evaluation value for evaluating the degree to which damage or deterioration of a structure occurs and is affected by the damage or deterioration. The degree of anomaly (“abnormality evaluation value” or “evaluation value”) can be said to be an evaluation value of the structure evaluated based on the measurement result of the acceleration sensor 103. The threshold value for determining the degree of abnormality is not limited to one, and a plurality of threshold values may be set.

The measurement cycle determination unit 304 determines the measurement operation mode of the acceleration sensor 103 according to the abnormality value (abnormality evaluation value) determined by the abnormality determination unit 303.

Various methods can be applied to how the measurement cycle determination unit 304 evaluates the abnormal evaluation value. In this embodiment, as an example, a case where the measurement cycle determination unit 304 makes a multi-step determination is assumed, and a case where a plurality of stages of determination can be determined is illustrated. For example, the measurement cycle determination unit 304 uses a plurality of different value threshold values to obtain an abnormality evaluation value, for example, "abnormal evaluation value 0", "abnormal evaluation value 1", "abnormal evaluation value 2", and "abnormal evaluation value". It is divided into four categories of "3". “Abnormal evaluation value 0” has the least effect of abnormality and can be evaluated as “no abnormality”. After that, it is assumed that the influence of the abnormality is large in order, and the “abnormality evaluation value 3” is the largest influence of the abnormality.

Further, the measurement cycle determination unit 304 determines the measurement operation mode of the acceleration sensor 103 according to the abnormality evaluation value. Various methods can be applied to determine the measurement operation mode according to the abnormality evaluation value. In this embodiment, for example, "abnormal evaluation value 0" → "long period mode" as shown below.
"Abnormal evaluation value 1" → "Short cycle mode"
"Abnormal evaluation value 2" → "Simultaneous measurement short cycle mode"
"Abnormal evaluation value 3" → "Simultaneous measurement ultra-short cycle mode"
The measurement operation mode for operating the acceleration sensor 103 is determined according to the abnormality evaluation value. The number of abnormal evaluation values and operation modes is not limited to the above-mentioned numbers.

As a result, when it is determined that the degree of abnormality is small based on the evaluation value (abnormality evaluation value) of each radio device 10, the timing of operating the acceleration sensor 103 is set to a long cycle, while the degree of abnormality is large. When it is determined that the period is short. In other words, the accelerometer 103, which is arranged at a location where there is little damage or deterioration of the structure, operates the sensor in a long cycle. As a result, power consumption can be suppressed. On the other hand, the accelerometer 103, which is arranged in a place where the structure is frequently damaged or deteriorated, operates the sensor in a short cycle.

The measurement cycle determination unit 304 determines the measurement operation mode of each acceleration sensor 103, and gives the control unit 302 the schedule information of the measurement operation including the time when each acceleration sensor 103 is operated. The control unit 302 causes each radio unit 10 to transmit information including the schedule information of the measurement operation as information regarding the measurement operation.

The storage unit 305 is a storage area for storing the measurement result of each radio device 10 for each radio device 10. Further, the storage unit 305 may store the calculation result derived by the abnormality determination unit 303 for each radio unit 10. The measurement results include, for example, identification information of the radio 10 (for example, MAC address, IP address, etc.), identification information of the acceleration sensor 103, measurement time, measurement data (sensing data), measurement operation mode type of the acceleration sensor 103, and measurement. It may be a combination of all or a part of the timing cycle, the member type of the structure, and the like.

[Internal configuration of radio]
FIG. 3 is an internal configuration diagram showing an internal configuration of the radio 10 according to the embodiment.

In FIG. 3, the radio 10 includes a communication unit 101, a control unit 102, an acceleration sensor 103, a schedule determination unit 104, a timer unit 105, and a clock unit 106.

Each part of the radio 10 according to this embodiment may be configured by hardware, or some configurations may be configured by software.

The communication unit 101 is a communication interface for accessing the sensor network SN.

The control unit 102 is a device and a processing unit that control various functions in the radio 10. The control unit 102 may be composed of, for example, a device having a CPU, ROM, RAM, EEPROM, an input / output interface, and the like. The processing may be realized by the CPU executing a processing program (for example, a measurement operation program) stored in the ROM.

When the control unit 102 receives the information regarding the measurement operation from the monitoring device 30 via the communication unit 101, the control unit 102 gives the information including the measurement operation schedule received from the monitoring device 30 to the schedule determination unit 104.

The “measurement operation schedule” refers to schedule information for operating a sensor (for example, an acceleration sensor 103) in the radio 10. In this embodiment, the measurement operation schedule includes the periodic measurement timing described later. At the time or time when the sensor is operated, the radio 10 supplies power to the components including the sensor to bring it into an operating state, but during other times or times, the radio 10 is used to reduce power consumption. Goes into hibernation. In other words, the measurement operation schedule can be said to be an operation schedule for transitioning the state of the radio 10 to a hibernation state or an operation state.

The acceleration sensor 103 senses the physical quantity to be measured on a structure such as a bridge. One radio 10 may include one acceleration sensor 103, or one radio 10 may include a plurality of acceleration sensors 103. In this embodiment, the acceleration sensor 103 is provided, but the sensor type is not limited to this. For example, the radio 10 may use various types of sensors such as a temperature sensor, a humidity sensor, a vibration sensor, and an infrared image sensor in addition to the acceleration sensor 103 or instead of the acceleration sensor 103.

The schedule determination unit 104 determines the measurement operation schedule (that is, the periodic measurement timing) for operating the acceleration sensor 103 based on the measurement operation schedule information received from the monitoring device 30. The schedule determination unit 104 sets the measurement operation schedule in the timer unit 105.

The timer unit 105 manages the state (hibernate state, operating state) of the radio 10 based on the measurement operation schedule set by the schedule determination unit 104.

For example, the timer unit 105 monitors the current time from the clock unit 106. Meanwhile, the radio 10 is in a dormant state. Here, the hibernation state means a state in which the functions of some elements of the radio 10 are operating and the other elements are stopped. For example, in this embodiment, the state in which the timer unit 105 and the clock unit 106 of the radio 10 are operating and the other elements are stopped is referred to as a “hibernation state”.

Then, when the current time reaches the measurement time of the measurement operation schedule (measurement timing), the timer unit 105 gives an activation instruction to the control unit 102. That is, the timer unit 105 gives a start instruction to the control unit 102 in order to operate the measurement operation. As a result, the radio 10 is changed from the hibernation state to the activation state.

The clock unit 106 is a clock that provides the current time.

(B-2) Operation of the Embodiment Next, the processing operation in the monitoring system 1 according to the embodiment will be described in detail with reference to the drawings.

In the following, each radio 10 determines a measurement operation schedule indicating at what time the sensor (for example, the acceleration sensor 103) of each radio 10 is operated and the other time is paused.

[Monitoring process]
An example of a general processing operation of the monitoring process in the monitoring system 1 will be described. In the following, it is assumed that the times are synchronized among the plurality of radios 10, the master 20 and the monitoring device 30.

First, a plurality of acceleration sensors 103 are installed in the structure to be monitored. Depending on the type of structure, the parts that are easily damaged or deteriorated are known. Therefore, in order to enable more detailed analysis of the degree of abnormality at a location where damage or deterioration is likely to occur, more acceleration sensors 103 may be arranged than at other locations.

The monitoring device 30 may manage the acceleration sensor 103 installed in the structure in advance. For example, in a structure, a plurality of acceleration sensors 103 may be arranged at a specific location. In that case, the specific location information that identifies the specific location (for example, the identification information in the structure) may be managed in association with the identification information of the plurality of acceleration sensors 103 to be arranged. As a result, it is possible to know in advance which acceleration sensor 103 is arranged and how it is arranged with respect to a specific location.

In each radio 10, the acceleration sensor 103 operates periodically, and the acceleration sensor 103 measures data indicating the characteristics of the structure.

For example, in a structure such as a bridge, the structure vibrates as the vehicle travels, and the structure may be damaged or deteriorated over a long period of time. The acceleration sensor 103 of each radio 10 measures the vibration data generated in the structure. That is, the acceleration sensor 103 measures the value of the vibration data generated by the traveling vehicle weighting (applying a load) to the bridge.

The measured vibration data value is given to the control unit 102, and the communication unit 101 transmits a communication signal including the vibration data value to the master unit 20. For example, the address information of the radio 10 is used as the source address, the address information of the master 20 is used as the destination address, and a communication signal including the measurement result of the acceleration sensor 103 of the radio 10 is transmitted to the master 20. Will be done.

The master unit 20 relays a communication signal including a measurement result (vibration data value) received from each of the plurality of radio units 10 toward the monitoring device 30.

When the monitoring device 30 receives a communication signal including the measurement result from each radio device 10, the monitoring device 30 stores the measurement result from each radio device 10 in the storage unit 305.

Further, the abnormality determination unit 303 compares the past measurement result with the latest measurement result for each radio 10 to determine a predetermined abnormality evaluation value.

[Measurement timing control processing]
Next, the operation of the measurement timing control process by the measurement cycle determination unit 304 of the monitoring device 30 will be described in detail with reference to the drawings.

FIG. 4 is a flowchart showing the operation of the measurement timing control process according to the embodiment.

The measurement cycle determination unit 304 acquires an abnormality evaluation value of each acceleration sensor 103 measuring a specific location of the structure (S101). The measurement cycle determination unit 304 determines the measurement operation mode using each abnormality evaluation value and the threshold value (S102).

For example, the measurement cycle determination unit 304 uses the anomaly evaluation value and the threshold value to make four of "abnormal evaluation value 0", "abnormal evaluation value 1", "abnormal evaluation value 2", and "abnormal evaluation value 3". Divide. Then, when "abnormal evaluation value 0", "long cycle mode", when "abnormal evaluation value 1", "short cycle mode", when "abnormal evaluation value 2", "simultaneous measurement short cycle mode", "abnormal evaluation value" At the time of "3", the measurement operation mode of the acceleration sensor 103 is determined, such as "simultaneous measurement ultra-short cycle mode".

Here, a specific location of the structure may be measured by one acceleration sensor 103, or may be measured by a plurality of acceleration sensors 103.

Further, the measurement cycle determination unit 304 monitors the abnormality evaluation value of each acceleration sensor 103 that is periodically measured. When the abnormal evaluation value becomes high, the measurement operation mode and the measurement timing of one or a plurality of acceleration sensors 103 measuring the specific location where the abnormal evaluation value becomes high can be changed.

[Long period mode]
When the "abnormal evaluation value is 0", the long period mode is set (S103). The measurement cycle determination unit 304 acquires the measurement cycle time for the preset long cycle mode (S104), and obtains the measurement timing for operating the acceleration sensor 103.

For example, in the long period mode, the acceleration sensor 103 is operated in the longest period as compared with other measurement operation modes. It is judged that there is no abnormality such as damage or deterioration in the structure to be monitored, and there is no influence due to damage or deterioration.

The measurement cycle time for the long cycle mode is the cycle time for measuring the state of a specific location in the long cycle mode. Here, for example, the case where it is every 24 hours is illustrated, but the case is not limited to this.

First, a case where measurement of a specific location of a structure is performed by one acceleration sensor 103 will be described.

When there are not a plurality of acceleration sensors 103 measuring a specific part of the structure (S105 / No), the measurement cycle determination unit 304 can determine that the acceleration sensor 103 is to perform measurement every 24 hours. .. That is, the measurement timing of the acceleration sensor 103 is determined to be every 24 hours (S107).

Then, a communication signal including the determined measurement timing is transmitted to the radio 10 having the acceleration sensor 103. In the radio 10, the schedule determination unit 104 sets the measurement operation schedule in the timer unit 105 based on the received measurement timing.

Next, a case where measurement of one specific location is performed by a plurality of acceleration sensors 103 will be described.

When there are a plurality of acceleration sensors 103 measuring a specific location of a structure (S105 / Yes), the measurement cycle determination unit 304 uses a plurality of acceleration sensors 103 so as to measure one specific location every 24 hours. The measurement timing is obtained from each acceleration sensor 103 so that it can be monitored (S106) (S107). More specifically, with reference to FIG. 5, a case where measurement at one specific location is performed by two acceleration sensors 103 will be described.

FIG. 5 is an explanatory diagram illustrating an operation cycle for operating the acceleration sensor 103 when the “abnormality evaluation value is 0”.

Here, the case where there are two acceleration sensors 103 (in FIG. 5, they are referred to as “sensor # 1” and “sensor # 2”) is illustrated. For example, it is assumed that two acceleration sensors 103 are arranged at a specific location of a structure and the vibration transmitted to the specific location is inspected by the two acceleration sensors 103. In this case, the measurement start times of the two acceleration sensors 103 are shifted by 24 hours, and the operation cycle of the one acceleration sensor 103 is set to every 48 hours.

Then, a communication signal including the determined measurement timing is transmitted to the radio 10 having the acceleration sensor 103. In the radio 10, the schedule determination unit 104 sets the measurement operation schedule in the timer unit 105 based on the received measurement timing.

By doing so, when one specific part of the structure is measured by two accelerometers 103, the operation cycle is doubled as compared with the case where each accelerometer 103 operates every 24 hours. It becomes possible to extend to. In other words, the acceleration sensor 103 in one radio station 101 can be in a dormant state for a long period of time, and power saving can be achieved.

In the above example, the case of measuring with two acceleration sensors 103 is illustrated, but when measuring with three acceleration sensors 103, the measurement start time of each acceleration sensor 103 is shifted by 24 hours, and one acceleration sensor is used. The operation cycle of 103 can be set to every 72 hours.

Structures are damaged or deteriorated over a long period of time. Therefore, in long-period mode, short-period measurements may not always be necessary. However, apart from the necessity of such measurement, it is necessary to detect an operation abnormality, trouble, etc. of the sensor, and therefore, it is required to operate each sensor at a certain time interval. From this point of view, the measurement cycle time for the long cycle mode can be set.

[Short cycle mode]
When the "abnormal evaluation value 1" is set, the short cycle mode is set (S108). The measurement cycle determination unit 304 acquires the measurement cycle time for the preset short cycle mode (S109), and obtains the measurement timing for operating the acceleration sensor 103.

For example, the short cycle mode is an example when an abnormality such as damage or deterioration is detected in the structure to some extent. In this case, there is a possibility that the measurement result when an abnormality such as damage or deterioration is detected is incorrect, and it is also necessary to determine whether the abnormality is not abnormal or whether the abnormality is really occurring. In addition, there is a possibility that the abnormal evaluation value has increased as compared with the case where the abnormal evaluation value is "abnormal evaluation value 0", and in that case, it is necessary to warn. Therefore, it is desired to increase the measurement frequency by the acceleration sensor 103 as compared with the case of "abnormal evaluation value 0".

The measurement cycle time for the short cycle mode is the cycle time for measuring the state of a specific location in the short cycle mode. Here, for example, the case where it is every 12 hours is illustrated, but the case is not limited to this.

When there are not a plurality of acceleration sensors 103 measuring a specific part of the structure (S105 / No), the measurement cycle determination unit 304 can determine that the acceleration sensor 103 is to perform measurement every 12 hours. .. That is, the measurement timing of the acceleration sensor 103 is determined to be every 12 hours (S107).

Then, a communication signal including the determined measurement timing is transmitted to the radio 10 having the acceleration sensor 103. In the radio 10, the schedule determination unit 104 sets the measurement operation schedule in the timer unit 105 based on the received measurement timing.

On the other hand, when there are a plurality of acceleration sensors 103 measuring a specific location of the structure (S105 / Yes), the measurement cycle determination unit 304 measures one specific location every 12 hours. The measurement timing is obtained from each accelerometer 103 so that it can be monitored by 103 (S106) (S107). More specifically, with reference to FIG. 6, a case where measurement at one specific location is performed by two acceleration sensors 103 will be described.

FIG. 6 is an explanatory diagram illustrating an operation cycle for operating the acceleration sensor 103 in the case of “abnormality evaluation value 1”.

Here, a case where there are two acceleration sensors 103 (in FIG. 6, they are referred to as “sensor # 1” and “sensor # 2”) is illustrated. In this case, the measurement start times of the two acceleration sensors 103 are shifted by 12 hours, and the operation cycle of the one acceleration sensor 103 is set to every 24 hours.

Then, a communication signal including the determined measurement timing is transmitted to the radio 10 having the acceleration sensor 103. In the radio 10, the schedule determination unit 104 sets the measurement operation schedule in the timer unit 105 based on the received measurement timing.

[Simultaneous measurement short cycle mode]
When the "abnormal evaluation value 2" is set, the simultaneous measurement short cycle mode is set (S110). The measurement cycle determination unit 304 acquires a preset measurement cycle time for the simultaneous measurement short cycle mode (S111), and sets this measurement cycle time as the measurement timing of the acceleration sensor 103 (S112).

Then, a communication signal including the determined measurement timing is transmitted to the radio 10 having the acceleration sensor 103. In the radio 10, the schedule determination unit 104 sets the measurement operation schedule in the timer unit 105 based on the received measurement timing.

For example, the simultaneous measurement short cycle mode is an example of an operation mode when it is clear that an abnormality has occurred. Here, the measurement cycle time for the simultaneous measurement short cycle mode is the same cycle time as the short cycle mode, and is, for example, every 12 hours, but the present invention is not limited to this.

FIG. 7 is an explanatory diagram illustrating an operation cycle for operating the acceleration sensor 103 in the case of “abnormality evaluation value 2”.

Here, a case where there are two acceleration sensors 103 (in FIG. 7, they are referred to as “sensor # 1” and “sensor # 2”) is illustrated.

In this case, the measurement cycle determination unit 304 simultaneously operates a plurality of acceleration sensors 103 measuring a specific location every 12 hours. By measuring with multiple sensors at the same time, it is possible to improve the reliability of the measurement and measure the state of a specific place where an abnormality has occurred.

[Simultaneous measurement ultra-short cycle mode]
When the "abnormal evaluation value 3" is set, the simultaneous measurement ultra-short cycle mode is set (S113). The measurement cycle determination unit 304 acquires a preset measurement cycle time for the simultaneous measurement ultra-short cycle mode (S114), and sets this measurement cycle time as the measurement timing of the acceleration sensor 103 (S112).

Then, a communication signal including the determined measurement timing is transmitted to the radio 10 having the acceleration sensor 103. In the radio 10, the schedule determination unit 104 sets the measurement operation schedule in the timer unit 105 based on the received measurement timing.

For example, the simultaneous measurement ultra-short cycle mode is an example of an operation mode in which damage, deterioration, etc. are further advanced than when the abnormality evaluation value is “abnormal evaluation value 2”. In this case, an alarm can be promptly issued when there is a fatal change in the structure.

In addition to detecting abnormalities such as aging deterioration of the structure, the simultaneous measurement ultra-short cycle mode is also used to judge the situation when a large external force is instantly applied to the structure, for example, immediately after an earthquake. it can. In such a case, an instruction may be given to the monitoring device 30 from the outside, and the acceleration sensor 103 may be instructed to shorten the measurement timing of the structure, assuming that the abnormality evaluation value has increased.

The measurement cycle time for the simultaneous measurement short cycle mode is, for example, every hour, but is not limited to this.

FIG. 8 is an explanatory diagram illustrating an operation cycle for operating the acceleration sensor 103 in the case of “abnormality evaluation value 3”.

Here, the case where there are two acceleration sensors 103 (in FIG. 8, they are referred to as “sensor # 1” and “sensor # 2”) is illustrated.

In this case, the measurement cycle determination unit 304 simultaneously operates a plurality of acceleration sensors 103 measuring a specific location every hour. By measuring with multiple sensors at the same time, it is possible to improve the reliability of the measurement and measure the state of a specific place where an abnormality has occurred.

(B-3) Effect of Embodiment As described above, according to this embodiment, the power consumption in each radio can be reduced by controlling the measurement operation of the sensor according to the abnormality evaluation value. ..

Further, according to this embodiment, it is possible to further reduce the power consumption in the normal state by shifting the operation timings of the plurality of devices (sensors, radios) measuring the specific points to be monitored and operating them alternately. It becomes possible and long-term measurement becomes possible.

(C) Other Embodiments Although various modified embodiments have been mentioned in the above-described embodiments, the present invention can also be applied to the following modified embodiments.

(C-1) In the above-described embodiment, the case where the monitoring target is one same structure is illustrated, but this is also when a plurality of structures implemented at the same time are collectively monitored as one group. The invention can be used as it is.

(C-2) In the above-described embodiment, the case where the monitoring device determines the measurement operation mode according to the abnormality evaluation value and instructs the radio device having each sensor to measure the measurement timing (measurement operation schedule) is illustrated. .. However, the master unit may be provided with various functional units (measurement timing control device of the present invention) such as an abnormality determination unit and an operation mode determination unit included in the above-mentioned monitoring device. Further, the functions of the abnormality determination unit and the operation mode determination unit described above are not limited to be physically provided in the same device, and each of them may be distributed.

1 ... Monitoring system, 10 (10-1 to 10-n) ... Radio, 20 ... Master unit, 30 ... Monitoring device, 101 ... Communication unit, 102 ... Control unit, 103 ... Accelerometer, 104 ... Schedule determination unit, 105 ... Timer unit, 106 ... Clock unit, 301 ... Communication unit, 302 ... Control unit, 303 ... Abnormality determination unit, 304 ... Measurement cycle determination unit, 305 ... Storage unit.

Claims (7)

Measurement values acquired from a plurality of detection devices provided for one or more monitoring targets and measuring based on an operation schedule for periodically transitioning an operating state or a hibernation state, and a past measurement history for each of the above-mentioned detection devices. An abnormality determination means for determining an evaluation value that evaluates the degree of abnormality of the measured value from each of the above detection devices based on the information, and an abnormality determination means.
A measurement cycle determining means that changes the measurement cycle time indicating the interval measured by each of the detection devices in the operation schedule according to the evaluation value.
Measuring timing device, characterized in that it comprises a constant timing setting means altered the measurement period duration measurement to set to the above-described detecting device by the measuring period determining means. The measurement cycle determination means is
By comparison with the upper Symbol evaluation value and the threshold value, when it is determined that there is no abnormality, change longer the measurement period duration,
With increasing the evaluation value, changing shortening the measurement cycle time
Measuring timing control apparatus according to claim 1, wherein the this. The measurement timing control device according to claim 1 or 2, wherein the measurement cycle determining means simultaneously measures a plurality of the detection devices at an abnormality specific location where the evaluation value exceeds a threshold value. The measurement timing control device according to any one of claims 1 to 3, wherein when the measurement cycle determining means obtains an abnormal situation notification from the outside, it operates assuming that the evaluation value has increased. Computer,
Measurement values acquired from a plurality of detection devices provided for one or more monitoring targets and measuring based on an operation schedule for periodically transitioning an operating state or a hibernation state, and a past measurement history for each of the above-mentioned detection devices. An abnormality determination means for determining an evaluation value that evaluates the degree of abnormality of the measured value from each of the above detection devices based on the information, and an abnormality determination means.
A measurement cycle determining means that changes the measurement cycle time indicating the interval measured by each of the detection devices in the operation schedule according to the evaluation value.
Measuring timing control program for causing to function changed the measurement cycle time by the measurement interval determining means as a constant timing setting means measuring to set to the above-described detecting device. Anomaly determination means is provided for one or more monitoring targets, and measurement values acquired from a plurality of detection devices that perform measurement based on an operation schedule that periodically transitions an operating state or a hibernation state, and each of the above-mentioned detection devices. Based on the past measurement history information of , the evaluation value that evaluated the degree of abnormality of the measurement value from each of the above detection devices is determined.
The measurement cycle determining means changes the measurement cycle time indicating the interval measured by each of the detection devices in the operation schedule according to the evaluation value.
Measuring timing control method measurement timing setting means, the measurement cycle time is changed by the measuring period determining means, characterized in that to set the above detection device. Measurement values acquired from a plurality of detection devices provided for one or more monitoring targets and measuring based on an operation schedule for periodically transitioning an operating state or a hibernation state, and a past measurement history for each of the above-mentioned detection devices. An abnormality determination means for determining an evaluation value that evaluates the degree of abnormality of the measured value from each of the above detection devices based on the information, and an abnormality determination means.
A measurement cycle determining means that changes the measurement cycle time indicating the interval measured by each of the detection devices in the operation schedule according to the evaluation value.
Monitoring device, characterized in that it comprises a constant timing setting means altered the measurement period duration measurement to set to the above-described detecting device by the measuring period determining means.

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