JP6032380B1 - Monitoring system and monitoring method - Google Patents

Abstract

In a conventional structural health monitoring system, when measurement data from a large number of sensor devices is collected in one computer or relay device, the communication distance of the sensor device is increased, resulting in a significant increase in power consumption during communication. It will increase. A plurality of sensor devices installed at least one for each of a plurality of structures to detect a physical quantity of the target structure and at least one of the plurality of structures are included. A plurality of collection devices that are provided in association with each structure group, and each collect wirelessly the physical quantity data detected by each sensor device installed in each structure included in the target structure group, and a plurality of collection devices A structural health monitoring system and a structural health monitoring method are provided that include a data processing device that is connected to a collection device and receives physical quantity data collected by a plurality of collection devices from the plurality of collection devices. [Selection] Figure 1

Description

The present invention relates to a monitoring system and monitoring method.

  The structural health monitoring system monitors structural vibrations such as buildings and diagnoses structural performance such as structural damage and aging. A structural health monitoring system is constructed including, for example, a sensor device including an acceleration sensor that detects vibration of a structure, and a computer that analyzes measurement data from the sensor device (for example, Patent Documents 1 and 2).

In such a structural health monitoring system, each sensor device transmits measurement data by wire or wireless, so that a computer or a relay device collects measurement data from a plurality of sensor devices.
[Patent Document 1] JP-A-2015-111091 [Patent Document 2] JP-A-2014-174715

  However, in the conventional structural health monitoring system, depending on the arrangement of the target structure, when the measurement data is wirelessly transmitted from a large number of sensor devices to one computer or relay device, the communication distance of the sensor device becomes long. As a result, power consumption during communication is significantly increased.

  In the first aspect of the present invention, at least one sensor is installed for each of the plurality of structures and detects a physical quantity of the target structure, and at least one of the plurality of structures. A plurality of units each of which collects data of physical quantities detected by each sensor device installed in each structure included in each target structure group in association with each structure group including two structures. Structural health monitoring system, collection device, and structural health monitoring method comprising: a collection device; and a data processing device connected to the plurality of collection devices and receiving physical quantity data collected by the plurality of collection devices from the plurality of collection devices I will provide a.

  The summary of the invention does not enumerate all the features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

It is a block diagram which shows the structural health monitoring system which concerns on this embodiment. It is a flowchart which shows operation | movement of the structural health monitoring system which concerns on this embodiment. It is a conceptual diagram which shows the example of installation of the structural health monitoring system 1 which concerns on this embodiment. It is a conceptual diagram which shows the example of installation of the structural health monitoring system 1 in a modification (1). It is a conceptual diagram which shows the example of installation of the structural health monitoring system 1 in a modification (2).

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

[Outline of structural health monitoring system]
FIG. 1 is a block diagram showing a structural health monitoring system 1 according to the present embodiment. The structural health monitoring system 1 diagnoses the structural performance of a plurality of structures 101, and includes a plurality of sensor devices 2, a plurality of collection devices 3, a data processing device 4, a diagnostic server 5, and a rain gauge 6 And a wind direction anemometer 7 and a thermometer 8. Note that the rain gauge 6, wind direction anemometer 7, and thermometer 8 may be integrated with the sensor device 2.

  Here, the plurality of structures 101 are buildings as an example in the present embodiment. A building is a building which is used for the purpose of a building, that is, a residence, an office, a store, a factory, a warehouse, and the like, and has a roof and a peripheral wall. This structure 101 is provided facing the road 102 (see FIG. 3), for example.

  The plurality of sensor devices 2 are installed at least one, preferably a plurality, for each of the plurality of structures 101, and a physical quantity of the target structure 101, for example, an acceleration when the structure vibrates due to an earthquake or the like. In addition, the inclination of the structure is detected. When a plurality of sensor devices 2 are installed for one structure 101, these sensor devices 2 are preferably provided, for example, on a lower floor (for example, the first floor) and a higher floor (for example, the uppermost floor). Is also provided on one or more middle floors and / or the ground and underground.

  Each sensor device 2 includes, for example, a clock unit 20, a memory 23, a sensor unit 24, a data processing unit 25, and a communication unit 26, and preferably further includes an independent power source 200.

  The clock unit 20 is a circuit having a clock function, holds time data therein, and outputs a clock signal to each unit in the apparatus, for example, the sensor unit 24, the data processing unit 25, the communication unit 26, and the like. The clock unit 20 of each sensor device 2 is maintained so that each time data is in a synchronized state.

  The memory 23 stores programs and data for realizing various functions of the sensor device 2. For example, the memory 23 stores physical quantity data detected by the sensor unit 24.

  The sensor unit 24 detects the above-described physical quantity of the target structure 101. For example, the sensor unit 24 is an acceleration sensor that detects acceleration when a structure vibrates due to an earthquake or the like. As an example, the sensor may be a MEMS device integrated on a single silicon substrate, glass substrate, organic material, or the like, and more specifically, a capacitive sensor. The sensor unit 24 supplies the detected physical quantity data to the data processing unit 25.

  The data processing unit 25 includes a microcontroller or a microprocessor as an example, and performs various data processing. For example, the data processing unit 25 stores the physical quantity data received from the sensor unit 24 in the memory 23. Further, the data processing unit 25 reads the physical quantity data from the memory 23 and supplies the physical quantity data to the communication unit 26 for transmission to the collection device 3.

  The communication unit 26 wirelessly communicates with a corresponding one of the plurality of collection devices 3. For example, the communication unit 26 receives physical quantity data in the memory 23 from the data processing unit 25 and transmits it to the collection device 3.

  The communication unit 26 described above may communicate with the collection device 3 by wireless communication according to an arbitrary communication standard, and preferably communicates by short-range wireless communication. As the short-range wireless communication, Bluetooth (registered trademark) class 1 (communication distance of about 100 m), class 2 (communication distance of about 10 m) or class 3 (communication distance of about 1 m), 2.5 GHz using the 2.5 GHz band. Wi-fi using a band or 5 GHz band (communication distance of several tens to several hundreds of meters), infrared communication using an infrared wavelength band (communication distance of less than about 1 m), or 27 MHz band, 150 MHz band, 400 MHz band, 900 MHz Simple wireless communication using a band, a 920 MHz band, a 950 MHz band, or a 50 GHz band can be used. In the present embodiment, the communication unit 26 communicates with the collection device 3 by simple wireless communication in the 920 MHz band.

  The power source 200 generates electricity using environmental energy, accumulates electric power, and supplies it to each part of the sensor device 2. As environmental energy, for example, light, wind force, and / or constant vibration of a structure can be used. For example, the power source 200 includes a solar panel 201 that generates power by receiving natural light such as sunlight and / or light such as illumination light from a lighting device. The solar panel 201 may be provided integrally with the housing of the sensor device 2 or may be provided separately.

  The plurality of collecting devices 3 are respectively provided in association with a structure group 1000 including at least one structure 101. For example, the plurality of collection devices 3 are provided in association with the structure group 1000 including only one structure 101, that is, provided in a one-to-one correspondence with each of the plurality of structures 101. It has been. However, the plurality of collecting devices 3 may be provided in association with the structure group 1000 including the two structures 101 sandwiching the road 102.

Each of the plurality of collecting devices 3 may be installed within 100 m, preferably within 50 m from each structure 101 included in the corresponding structure group 1000. In a normal case, the minimum distance between the structure groups 1000 is the distance between each sensor device 2 installed in each structure group 1000 and the collection device 3 corresponding to the structure group 1000. Longer than the maximum distance. That is, the minimum distance between the structure groups 1000 is longer than the maximum wireless transmission distance at which each sensor device 2 installed in each structure group 1000 wirelessly transmits physical quantity data. Accordingly , it is possible to avoid congestion between wireless transmission from the sensor device 2 installed in one structure group 1000 and wireless transmission from the sensor device 2 installed in another structure group 1000. .

  Each collection device 3 wirelessly collects physical quantity data wirelessly transmitted from each sensor device 2 installed in each structure 101 included in the target structure group 1000, and includes a clock unit 30. The time receiving unit 31 includes a wireless communication unit 32, a memory 33, a control unit 35, and a data transmission unit 36.

  The clock unit 30 is a circuit having a clock function, holds time data therein, and outputs a clock signal to each unit in the apparatus, for example, the control unit 35. The time data in the clock unit 30 is synchronized with an external reference time by the control unit 35 as will be described later.

  The time receiving unit 31 receives time data from an external device and supplies it to the control unit 35. As an example, the time receiving unit 31 may receive time data included in the radio wave by receiving a GPS radio wave from a GPS (Global Positioning System).

  The wireless communication unit 32 performs wireless communication with the communication units 26 of the plurality of sensor devices 2. For example, the wireless communication unit 32 collects physical quantity data from the plurality of sensor devices 2 and supplies the collected physical quantity data to the control unit 35.

  The memory 33 stores programs and data for realizing various functions of the collection device 3. For example, the memory 33 stores physical quantity data collected from the plurality of sensor devices 2.

  The control unit 35 includes a microcontroller or a microprocessor as an example, and controls each unit. For example, the control unit 35 synchronizes the clock unit 30 with an external reference time. As an example, the control unit 35 causes the time reception unit 31 to receive a GPS radio wave, receives time data included in the radio wave from the time reception unit 31 and supplies the time data to the clock unit 30, so that the clock unit The time data in 30 is matched.

  In addition, the control unit 35 stores the physical quantity data received by the wireless communication unit 32 in the memory 33 in association with an identifier for identifying the sensor device 2 that is the transmission source. Then, the control unit 35 reads the physical quantity data from the memory 33 and supplies it to the data transmission unit 36 together with the identifier.

  The data transmission unit 36 transmits the physical quantity data supplied from the control unit 35 to the data processing device 4 connected to the collection device 3 by wire or wirelessly.

  The data processing device 4 is connected to a plurality of collecting devices 3. The data processing device 4 receives physical quantity data collected by the plurality of collection devices 3 from the plurality of collection devices 3 and performs various processes on the physical quantity data of the structure 101. For example, the data processing device 4 distributes the received physical quantity data for each structure 101 and for each sensor device 2 and provides the data to the diagnosis server 5.

  The diagnosis server 5 diagnoses the structural performance of the structure 101 by analyzing the physical quantity data from the data processing device 4 for each structure 101. For example, the diagnosis server 5 may periodically analyze the acceleration data detected by the sensor device 2 to calculate the resonance frequency of the structure 101, and diagnose the structural performance of the structure from its secular change. Further, the diagnosis server 5 may analyze the acceleration data to calculate the displacement of the hierarchy in which each of the plurality of sensor devices 2 is provided, and diagnose the structural performance of the structure from the secular change. More specifically, the diagnostic server 5 determines the maximum acceleration, the maximum interlayer deformation angle (the maximum value obtained by dividing the horizontal displacement of the structure at the time of the earthquake by the floor height, for example, the twice integrated value of the acceleration detection value), The structural performance (decrease in rigidity) may be diagnosed from the calculation results and / or changes in the natural frequency, mode (amplitude shape when vibrating at the natural frequency), and the like. Further, the diagnosis server 5 may display the diagnosis result to urge the maintenance company to perform maintenance, or may notify the user of the structure 101 of the danger. The diagnosis server 5 may be integrated with the data processing device 4.

  The data processing device 4 and the diagnostic server 5 may manage the data analysis result as a history, and may also manage the setting of the sensor unit 24 and the history thereof. Furthermore, the data processing device 4 and the diagnostic server 5 may also hold the measurement data of the rain gauge 6, the wind direction anemometer 7 and the thermometer 8 together with these data.

  Here, the rain gauge 6 measures the amount of precipitation in an area including the structure group 1000. Moreover, the wind direction anemometer 7 measures the wind direction and the wind speed in the area where the structure group 1000 is included. The thermometer 8 measures the air temperature in the area where the structure group 1000 is included. The rain gauge 6, wind direction anemometer 7, and thermometer 8 may always perform measurement, or may be performed in synchronization with an intermittent observation period described later by the sensor device 2. Further, the rain gauge 6, the wind direction anemometer 7, and the thermometer 8 may transmit the measurement data and time data at the time of measurement to the diagnosis server 5 in association with each other.

[Operation of structural health monitoring system]
Next, the operation of the structural health monitoring system 1 will be described. FIG. 2 is a flowchart showing the operation of the structural health monitoring system 1.

  First, the sensor device 2 refers to the clock unit 20 and determines whether or not an intermittent observation period starts (S100). For example, the intermittent observation period may be 3 minutes every hour. As an example, the sensor device 2 determines that the observation period starts when the time indicated by the clock unit 20 is the hour, that is, 0 hour 0 second of every hour.

  If it is determined that the observation period starts in S100 (S100; Yes), the sensor unit 24 continuously detects the physical quantity of the structure 101 while the observation period continues (S102). The sensor unit 24 supplies the detected physical quantity to the data processing unit 25. The sensor unit 24 may supply the physical quantity data to the data processing unit 25 after performing modulation, demodulation, zero point adjustment, and the like on the analog physical quantity data. Thus, by detecting the physical quantity during the intermittent observation period, the power consumption of the power source 200 is reduced.

  Next, the data processing unit 25 records physical quantity data in the memory 23 (S104). For example, the data processing unit 25 may AD-convert analog physical quantity data received from the sensor unit 24 and store the data in the memory 23. The data processing unit 25 may store the physical quantity data received from the sensor unit 24 in the memory 23 in association with the time data received from the clock unit 20. Through the processes in S102 and S104, the physical quantity detected in each intermittent observation period is recorded in the memory 23.

  Next, the sensor device 2 and the collection device 3 establish communication with each other (S106, S120). For example, the sensor device 2 may establish communication with the collection device 3 with reference to the clock unit 20 at a timing previously assigned to the sensor device 2 from the collection device 3.

  Next, the sensor device 2 transmits the detected physical quantity data to the collection device 3 (S108). For example, the data processing unit 25 reads a combination of physical quantity data and time data from the memory 23 and supplies the combination to the communication unit 26 together with the identifier of the sensor device 2. Then, the communication unit 26 transmits the supplied physical quantity data and the like to the collection device 3. The processing after receiving the physical quantity data by the collection device 3 will be described later.

  Through the processes of S106 to S108 described above, each of the plurality of sensor devices 2 transmits the measured physical quantity data to the collection device 3 at a timing according to the identification information assigned to the sensor device 2. And if the process of S108 is complete | finished, the sensor apparatus 2 will transfer a process to above-mentioned S100.

  On the other hand, when it is determined that the observation period does not start in S100 described above (S100; No), the sensor unit monitors whether or not a sudden event (for example, a disaster such as an earthquake or a typhoon or a traffic accident) has occurred. 24 detects a physical quantity (S110). For example, the sensor unit 24 may continuously detect the physical quantity within one duration (for example, 10 ms), or may detect the physical quantity once instantaneously.

  Next, the sensor unit 24 determines whether or not a sudden event has occurred (S112). For example, the sensor unit 24 may determine that an unexpected event has occurred when the physical quantity detected in S110 is greater than a reference threshold. In addition, the sensor unit 24 may determine that the occurrence of a sudden event is indicated when the detected physical quantity changes more than the reference ratio with respect to the immediately preceding physical quantity.

  When it is determined in S112 that no sudden event occurs (S112; No), the sensor device 2 returns the process to S100 described above. Thereby, unless the observation period starts (S100; No), the process of S110 is repeatedly performed. In this case, the process of S110 may be performed every reference interval (for example, every 5 seconds).

  If it is determined in S112 that a sudden event has occurred (S112; Yes), the sensor device 2 shifts the process to S104 described above. As a result, the physical quantity is detected in S110 even outside the intermittent observation period, and the physical quantity is recorded in the memory 23 in response to the determination in S112 that the detected physical quantity indicates the occurrence of a sudden event.

  In addition, the sensor apparatus 2 may repeat the process of S100, without performing the process of S110 and S112, when it determines with the observation period not starting by the process of S100 mentioned above (S100; No). Moreover, the sensor apparatus 2 may always perform S102 (or S110) -S108, without performing the process of above-mentioned S100 and S112.

  Here, when physical quantity data is transmitted from each sensor device 2 by the process of S108 described above, the collection apparatus 3 receives and collects these physical quantity data (S122). For example, the control unit 35 of the collection device 3 may store the physical quantity data received by the wireless communication unit 32 in the memory 33. Further, when the physical quantity data, the time data, and the identifier of the sensor device 2 are transmitted in association with each other from the sensor device 2, the control unit 35 may store these combinations in the memory 33.

  Next, the collection device 3 transmits physical quantity data collected from the plurality of sensor devices 2 to the data processing device 4 (S124). For example, the control unit 35 of the collection device 3 reads the combination of the physical quantity, the time data, and the identifier of the sensor device 2 from the memory 33 and supplies it to the data transmission unit 36. Then, the data transmission unit 36 transmits the supplied physical quantity data and the like to the data processing device 4.

  Next, the data processing device 4 receives physical quantity data from the plurality of collection devices 3 (S130). For example, the data processing device 4 may store physical quantity data received from the collection device 3 in an internal storage device. When physical quantity data, time data, and an identifier of the sensor device 2 are transmitted in association with each other from the collection device 3, the data processing device 4 may store these combinations.

  Then, the data processing device 4 performs data processing on the received physical quantity data (S132). For example, the data processing device 4 distributes the received physical quantity data for each structure 101 and for each sensor device 2 and provides the data to the diagnosis server 5. However, the data processing device 4 may diagnose the structural performance of the structure 101 by analyzing the physical quantity data for each sensor device 2.

  According to the structural health monitoring system 1 described above, the collection device 3 provided in association with each of the structure groups 1000 each including at least one structure 101 includes each structure included in the target structure group 1000. Since the physical quantity data detected by each sensor device 2 installed in 101 is collected wirelessly, it is possible to prevent the communication distance of the sensor device 2 from becoming long and the power consumption during communication from being significantly increased. it can.

[Example of structural health monitoring system installation]
FIG. 3 is a diagram illustrating an installation example of the structural health monitoring system 1 according to the present embodiment. As shown in this figure, the sensor device 2 of the structural health monitoring system 1 in the present embodiment is installed on each of the lower, middle and upper floors of a structure 101 which is a building of a high-rise building (installed underground). Sometimes). In addition, one collecting device 3 is installed in a state where it can communicate with these sensor devices 2. In FIG. 3, one collection device 3 is associated with the structure group 1000 including one structure 101, but one collection device 3 is associated with the structure group 1000 including a plurality of structures 101. It may be attached.

[Modified example of installation example of structural health monitoring system (1)]
FIG. 4 is a diagram illustrating an installation example of the structural health monitoring system 1 in the modification (1).

  As shown in this figure, the sensor device 2 of the structural health monitoring system 1 in the modification (1) includes a first structure 105 of the plurality of structures 101 and a road 102 with respect to the first structure 105. And the second structure 106 on the opposite side.

  Here, the first structure 105 and the second structure 106 are road-accompanying structures. The road incidental structure is a structure provided on the surface, upper part, or side part of the road 102, such as a signal, a guide display board, lighting equipment, a guardrail, or the like. In the present modification (1), the first structure 105 and the second structure 106 are lighting facilities for the road 102.

  The sensor device 2 is installed on the base portion of the first structure 105 and the second structure 106, the upper part of the support, and the vicinity of the illumination unit. In addition, the solar panel 201 of the sensor device 2 installed in the upper part of the support column and in the vicinity of the illumination unit is directed to a direction in which illumination light from the illumination unit can be received in addition to sunlight so that the amount of received light per day is maximized. It has been.

  One of the plurality of collecting devices 3 is provided corresponding to the structure group 1000 including the first structure 105 and the second structure 106, and the first structure 105 and the first structure 105. Communication with the sensor device 2 of the two structures 106 is possible.

[Modified example of installation of structural health monitoring system (2)]
FIG. 5 is a diagram illustrating an installation example of the structural health monitoring system 1 in the modification (2).

  As shown in this figure, the sensor device 2 of the structural health monitoring system 1 in the modification (2) includes the first structure 107 provided in the lane in one direction of the road 102 and the first structure in the opposite lane. The second structure 108 is provided at a position corresponding to the object 107. For example, in the present modification, the first structure 107 and the second structure 108 are road-accompanying structures, and as an example are road guidance display boards.

  One of the plurality of collecting devices 3 is provided corresponding to the first structure 107 and the second structure 108, and the sensors of the first structure 107 and the second structure 108 are provided. Communication with the device 2 is possible.

  In addition, in said embodiment and modification (1), (2), although the structures 101 and 105-108 were demonstrated as a building or a road incidental structure, another structure may be sufficient. Here, the other structure may be made of, for example, a structure composed of a plurality of materials, members, and the like, and having a weight supported by a foundation or the like. As an example, the structure is an airport control tower, airfield lighthouse, highway, station, railroad rail, railway signal, harbor crane, plant (petrochemical, iron making), steel bridge, dam, embankment, embankment, slope It can be a bank.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

1 structural health monitoring system, 2 sensor device, 3 collection device, 4 data processing device, 5 diagnostic server, 6 rain gauge, 7 wind direction anemometer, 8 thermometer, 20 clock unit, 23 memory, 24 sensor unit, 25 data processing Unit, 26 communication unit, 30 clock unit, 31 time reception unit, 32 wireless communication unit, 33 memory, 35 control unit, 36 data transmission unit, 101 structure, 102 road, 105 structure, 106 structure, 107 structure , 108 structure, 200 power supply, 201 solar panel, 1000 structure group

Claims (14)

A plurality of sensor devices installed at least one for each of the plurality of structures and detecting physical quantities of the target structure;
A physical quantity detected by each sensor device installed in each structure included in each structure group provided in association with each structure group including at least one structure among the plurality of structures. A plurality of collecting devices for collecting data wirelessly;
A data processing device connected to the plurality of collection devices and receiving physical quantity data collected by the plurality of collection devices from the plurality of collection devices;
Equipped with a,
The minimum distance between the structure groups is a monitoring system in which each sensor device installed in each structure group is longer than a maximum wireless transmission distance at which physical quantity data is wirelessly transmitted . The monitoring system according to claim 1, wherein each of the plurality of collection devices is provided in a one-to-one correspondence with each of the plurality of structures. The first collection device of the plurality of collection devices corresponds to a structure group including the first structure and the second structure on the opposite side of the first structure among the plurality of structures. The monitoring system according to claim 1, which is provided as follows. The first collection device of the plurality of collection devices is located at a position corresponding to the first structure in the lane in one direction of the road and the first structure in the opposite lane among the plurality of structures. The monitoring system of Claim 1 provided corresponding to the 2nd structure provided. 5. The monitoring system according to claim 1, wherein each of the plurality of sensor devices communicates with a corresponding collection device among the plurality of collection devices by short-range wireless communication. 6. The monitoring system according to claim 1, wherein each of the plurality of collection devices is installed within 100 m from each structure included in the corresponding structure group. The monitoring according to any one of claims 1 to 6 , wherein each of the plurality of sensor devices records a physical quantity detected by a target structure among the plurality of structures during each intermittent observation period. System . The monitoring system according to claim 7 , wherein each of the plurality of sensor devices records a physical quantity in response to determining that the detected physical quantity indicates the occurrence of a sudden event even outside the observation period. The monitoring system according to any one of claims 1 to 8 , wherein each of the plurality of collection devices receives GPS radio waves and adjusts the time. The monitoring system according to any one of claims 1 to 9 , wherein each of the plurality of sensor devices has a power source independently. Wherein each of the plurality of sensor devices, monitoring system according to claim 1 0 of the power generation by the environment energy. Monitoring system according to claim 1 1, respectively, for generating electricity by receiving the light of said plurality of sensor devices. Wherein each of the plurality of structures, monitoring system according to any one of claims 1 1 2 a building or road associated structures. At least one sensor device is installed for each of the plurality of structures, and a plurality of collecting devices are installed in association with each structure group that includes at least one structure among the plurality of structures. Stages,
A plurality of sensor devices which are Installation, and detecting a physical quantity of the structure of interest, respectively,
By the multiple collection device, the method comprising: collecting each physical quantity of data wirelessly to the sensor device detects installed in each of the structures contained in the structure unit of interest,
Receiving physical quantity data collected by the plurality of collection devices from the plurality of collection devices by a data processing device connected to the plurality of collection devices;
Equipped with a,
In the step of installing, the minimum distance between the structure groups is longer than the maximum wireless transmission distance in which each sensor device installed in each structure group wirelessly transmits physical quantity data. A monitoring method in which the plurality of collecting devices are installed in association with the structure group .

Images