JP2019120521A - Gap width data collection system and gap width estimation program - Google Patents

Abstract

To provide a gap width data collection system that can be installed without location constraints and commercial power supply and can reliably collect measurement data while realizing power saving.SOLUTION: A sensor unit 30a is installed in a structure 100, and directly or indirectly measures the width of a gap when receiving power from a rechargeable battery 26. A wireless communication unit 32 transmits the measured data indicating the measurement result wirelessly. A relay device 12 has a receiving unit for receiving the measured data when receiving power supply from the battery, and a storage unit for storing the measurement data. A length measuring device 10 performs transmission to the relay device 12 of the measured data by the wireless communication unit 32 in accordance with the power supply from the battery received for each first time and the measurement of the width of the gap by the sensor unit 30a. The relay device 12 supplies power to the receiving unit of the relay device 12 during a second time longer than the first time.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gap width data collection system and a gap width estimation program for grasping the gap width status in structures such as bridges, buildings, tunnels and the like.

  Techniques for detecting structural cracks are known. As an example of such a technique, Patent Document 1 is fixed to the inner wall surface of the tunnel so that a crack generated on the inner wall surface of the tunnel is located, and the change in width of the crack is enlarged and displayed as the movement of the tip of the pointer The crack amount indicator is described. Further, according to Patent Document 2, a plurality of metal plates are overlapped and arranged on a rubber plate extending following a crack, and when the rubber plate extends over the length of the overlap, the crack of the wrap width of the metal plate A sensor that can detect that it has occurred is described.

  There is also known a technology capable of constantly monitoring the state of health of a building. As an example of such a technology, Patent Document 3 wirelessly transmits the sensor information of a strain sensor, an acceleration sensor, and a temperature sensor disposed at a predetermined part of a building, thereby the soundness of the building. It is described that the status can be constantly monitored. In the technology described in Patent Document 3, sensor information is periodically measured by a wireless bridge sensor. And the result is stored in the data recording device by radio of the bridge sensor with radio. The data stored in the data recording device is transferred to a traveling vehicle equipped with a data collection device traveling on a bridge. Then, the data collected by the data collection device is input to the bridge diagnosis device.

JP, 2002-243403, A JP 2005-43220 A JP 2008-255570 A

  Cracks in the structure, joints when joining multiple structures, and gaps such as joints are caused by long-term changes over time, so constant measurement is not necessary but long-term monitoring is necessary. . Therefore, in order to enable long-term monitoring, a measuring device for detecting the state of a gap installed in a structure and a receiving device for receiving measurement data indicating the measurement result by the measuring device are stable from a commercial power supply. It is desirable to operate with a power supply. However, in this case, the installation places of the measuring device and the receiving device are restricted. If there are restrictions on the installation locations of the measuring device and the receiving device, it is not possible to grasp the state of the gap depending on the location of the gap.

  Here, when the measuring device and the receiving device are operated by the power supply from the battery, the measuring device and the receiving device can be installed in free places. However, in this case, since the power that can be stored in the battery is limited, power saving of the measuring device and the receiving device is required to realize long-term monitoring. Here, for example, as a measuring device, the measuring value is not reset even if energized intermittently, and the measuring device is used by measuring the width of the gap directly or indirectly when receiving the power supply from the battery. Power consumption can be reduced.

  However, even in this case, when it is necessary to always energize the receiving apparatus, it can not be said that power saving of the receiving apparatus is sufficient. For example, as in the technology described in Patent Document 3, the wireless bridge sensor equivalent to the above-mentioned measuring device is intermittently energized while the data recording device equivalent to the above-mentioned receiving device is always energized It can not be said that the power saving of the data recording device is sufficient.

  Therefore, in order to realize further power saving, it is conceivable to intermittently energize both the measuring device and the receiving device. However, in this case, the communication timing of the measurement result by the wireless bridge sensor does not necessarily coincide with the measurement device and the reception device, and as a result, the reliability of the communication of the data of the measurement result is lowered.

  In addition, in order to grasp the width of the gap of the structure at a place away from the structure, it may be necessary to grasp the absolute amount of the width of the gap rather than the amount of change of the width of the gap.

  The present invention has been made in view of the above problems, and one of the objects of the present invention is that it can be installed without any restriction on a place without a commercial power supply, and can realize measurement data securely while realizing power saving. An object of the present invention is to provide a gap width data acquisition system which can be acquired.

  Another object of the present invention is to provide a gap width estimation program capable of grasping the absolute amount of the current width of the gap of a structure.

  (1) A gap width data collection system according to the present invention is provided in a structure, and a sensor unit that measures the width of the gap of the structure directly or indirectly when receiving power supply from a battery; A measurement unit having a transmitter configured to wirelessly transmit measurement data indicating a measurement result by the sensor unit; and the measurement data transmitted by the transmitter of the measurement unit when power is supplied from a battery And a storage unit for storing the measurement data, wherein the measurement device is configured to receive the power by the sensor unit in response to power supplied from a battery every first time period. Performing a measurement of the width of the gap and transmitting the measurement data indicating the measurement result of the measurement by the transmission unit to the receiving device, the receiving device performing a second time longer than the first time During the reception unit It supplies power. Here, the gap is not limited to a crack in one structure, but includes joints, joints, and the like when a plurality of structures are joined. Also, even if there is no gap at the time of installation, the measuring device may be installed at a location where a gap is expected to occur in the future. In this case, the gap width is 0 mm until the gap is generated.

  (2) In the gap width data acquisition system according to (1) above, the measurement device further includes a scale section installed on the structure across the gap and movable in a predetermined direction, The sensor unit measures a length between a first point and a second point across the gap in the scale unit when the sensor unit is installed in the structure, and the transmission unit measures the length of the first point The measurement data indicating the length between the second point and the second point may be transmitted.

  (3) In the gap width data collection system according to (2), measured width data storage means for storing measured width data indicating the measured value of the gap width of the structure, and the measurement by the measuring device An initial measurement length data storage unit storing initial measurement length data indicating a length between the first point and the second point across the gap at a predetermined initial timing; Comparison measurement length data receiving means for receiving comparison measurement length data indicating a length between the first point and the second point at a comparison timing later than the initial timing; The width of the gap at the comparison timing is estimated based on the measured value of the width of the gap indicated by the data, the length indicated by the initial measurement length data, and the length indicated by the comparative measurement length data. Gap width estimating apparatus has a width estimating means, for, may be further comprising configure.

  (4) The gap width estimation program according to the present invention stores the measured width data indicating the measured value of the gap of the structure in the measured width data storage means, and measures by the measuring device arranged across the gap Storing, in the initial measurement length data storage means, initial measurement length data indicating a length between the first point and the second point across the gap at a predetermined initial timing; A procedure for receiving comparative measurement length data indicating a length between the first point and the second point at a comparison timing that is later than the initial timing, the gap indicated by the measured width data The procedure for estimating the width of the gap at the comparison timing based on the actual measurement value of the width of the first measurement, the length indicated by the initial measurement length data, and the length To be executed by the over data.

It is a block diagram of the gap width data acquisition system concerning one embodiment of the present invention. It is a block diagram of the relay apparatus based on one Embodiment of this invention. It is a figure which shows an example of control of the electric power supply timing in a length measurement apparatus and a relay apparatus. It is a functional block diagram showing an example of a function of a data accumulation server concerning one embodiment of the present invention. It is a figure which shows an example of monitor data. It is a flowchart which shows an example of the flow of the process performed by the data storage server which concerns on one Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

  FIG. 1 is a block diagram of a gap width data acquisition system 1 according to an embodiment of the present invention. As shown in FIG. 1, the gap width data collection system 1 according to the present embodiment includes a length measurement device 10, a relay device 12, and a data storage server 14. The length measurement device 10 and the relay device 12 can perform near field communication according to a standard such as Wi-Fi (registered trademark), for example. The relay device 12 and the data storage server 14 are connected to a computer network 16 such as the Internet, for example. Therefore, communication between the relay apparatus 12 and the data storage server 14 is possible via the computer network 16 such as the Internet.

  The length measuring device 10 includes a case 20, a case 22, a bellows 24, a rechargeable battery 26, a base 28, a length measuring device 30, a wireless communication unit 32, and a solar panel 34. It is done. Further, the length measuring device 30 includes a sensor unit 30a and a scale unit 30b.

  In the case 20, a housing portion opened in the positive direction of the X-axis shown in FIG. 1 is formed. The case 22 is formed with a housing portion opened in the negative direction of the X axis shown in FIG. The bellows 24 is a cylindrical member made of a material such as resin, and can extend and contract along the X-axis direction. The bellows 24 is formed with a hollow portion opening in the X-axis positive direction and the X-axis negative direction shown in FIG. Further, one end of the hollow portion of the bellows 24 is connected to the housing portion of the case 20, and the other end is connected to the housing portion of the case 22.

  In the present embodiment, for example, the length measurement device 10 is disposed across the gap (the crack 101 in the example of FIG. 1) of the structure 100 such as a bridge or a tunnel. The case 20 and the case 22 are fixed to the structure 100.

  In the housing portion formed in the case 20, the rechargeable battery 26 and the base 28 are housed. The rechargeable battery 26 and the base 28 are fixed to the lower wall of the housing portion of the case 20. The sensor unit 30 a of the length measuring device 30 and the wireless communication unit 32 are housed in the housing portion formed in the case 22. The sensor unit 30 a is fixed to the lower wall surface of the housing portion of the case 22. Further, in the sensor unit 30a, a hole penetrating along the X-axis direction shown in FIG. 1 is formed. The wireless communication unit 32 is fixed to the upper surface of the sensor unit 30a.

  The length measuring device 30 measures the length on the principle of digital calipers, for example. The length measuring device 30 has a length between the first point (for example, the position P1 of the zero point) and the second point (for example, the position P2 of the measurement point by the sensor unit 30a) across the crack 101 in the scale unit 30b. Measure

  The scale portion 30b of the length measuring device 30 is installed across the crack 101 of the structure 100 and is movable in a predetermined direction (for example, the X-axis direction shown in FIG. 1). In the present embodiment, for example, the scale 30b of the length measuring device 30 can move only in the X-axis direction shown in FIG. 1, the case of the case 20, the hollow portion of the bellows 24, and the case of the case 22. Is placed in the space formed by Further, one end of the scale portion 30b is fixed to the upper surface of the base 28, and the other end penetrates a hole formed in the sensor portion 30a. As a result, the scale portion 30b has its orbit limited so as to be movable only in the X-axis direction.

  The sensor unit 30a of the length measuring device 30 is installed in the structure 100, and measures the width of the crack 101 of the structure 100 directly or indirectly when receiving the power supply from the rechargeable battery 26. For example, the sensor unit 30a of the length measuring device 30 detects the capacitance between the electrode disposed on the scale unit 30b and the electrode disposed on the sensor unit 30a. Then, based on the capacitance, the sensor unit 30a is between the first point (for example, the position P1 of the zero point) and the second point (for example, the position P2 of the measurement point) across the crack 101 in the scale unit 30b. Measure the length of Here, a display may be provided on the surface of the sensor unit 30a to display the measured length on the display. In addition, even when the power is restored from the power-off state, the length measuring instrument 30 can measure the length from the position P1 of the preset zero point to the position P2 of the measurement point. For this reason, it is not necessary to always energize the length measuring device 30, and the power consumption of the length measuring device 10 can be suppressed.

  The solar panel 34 is provided on the top surface of the case 20. The power generated by the solar panel 34 is supplied to the rechargeable battery 26. The power stored in the rechargeable battery 26 is supplied to the sensor unit 30 a and the wireless communication unit 32. The sensor unit 30a and the wireless communication unit 32 operate by the power.

  The length measurement device 10 is installed so as to straddle the crack 101 of the structure 100 to be measured. Specifically, the length measuring device 10 is installed so that the case 20 and the case 22 of the length measuring device 10 straddle the crack 101. At this time, the case 20 and the case 22 are fixed using an adhesive or a double-sided tape according to the material and condition of the structure 100. In the length measuring device 10 installed in this manner, when the width of the crack 101 of the structure 100 widens or narrows, the case 20 and / or the case 22 fixed to the structure 100 move accordingly. Along with this, the scale unit 30b of the length measuring device 30 moves. Then, the length corresponding to the width of the crack 101 after being changed is measured by the sensor unit 30 a of the length measuring device 30.

  In the present embodiment, the length measuring device 30 outputs, to the wireless communication unit 32, length data which is measurement data indicating the measurement result by the sensor unit 30a. Then, the wireless communication unit 32 wirelessly transmits the length data output from the length measuring device 30 to the relay apparatus 12 via the built-in antenna. Then, the relay device 12 receives the length data. Here, in the present embodiment, the timer (not shown) included in the length measurement device 10 supplies power to the sensor unit 30a and the wireless communication unit 32 every predetermined first time (for example, at intervals of 3 minutes). Supply is done. The activation of the sensor unit 30a and the wireless communication unit 32, the measurement of the length from the position P1 of the zero point of the scale unit 30b to the position P2 of the measurement point by the sensor unit 30a, and the length indicating the length by the wireless communication unit 32 Transmission of data to the relay apparatus 12 and stop of the sensor unit 30a and the wireless communication unit 32 are executed. When the sensor unit 30a and the wireless communication unit 32 stop, power supply to the sensor unit 30a and the wireless communication unit 32 is not performed.

  As shown in FIG. 1, the relay device 12 according to the present embodiment is fixed and attached to, for example, a support 102 or the like. FIG. 2 is a block diagram of the relay device 12 according to the present embodiment. As shown in FIG. 2, the relay device 12 according to the present embodiment includes a solar panel 40, a charge controller 42, a battery 44, a fuse unit 46, a program timer 48, a converter 50, a microcomputer 52, a short distance communication module 54, A telecommunications module 56 is included.

  The solar panel 40 is provided on the front of the relay device 12. The power generated by the solar panel 40 is supplied by the charge controller 42 to a battery 44 such as a lead storage battery. Then, the power stored in the battery 44 is reduced by the converter 50 from, for example, 12 volts to 5 volts via the fuse unit 46 and the program timer 48. Then, the power reduced by the converter 50 is supplied to the microcomputer 52, the short distance communication module 54, and the long distance communication module 56.

  The program timer 48 is, for example, a timer that controls the state of a switch provided on a wire connecting the fuse unit 46 and the converter 50 at a predetermined timing. Here, for example, the program timer 48 may control the switch with 2 hours as one cycle. For example, 10 minutes after the program timer 48 switches the switch from the off state to the on state, the switch is switched from the on state to the off state, and after 110 minutes when the switch is switched from the on state to the off state, the switch is turned on from the off state You may switch to the state. By doing this, in the present embodiment, for example, the microcomputer 52, the short-distance communication module 54, and the long-distance communication module 56 receive the second time longer than the first time described above every two hours. Power will be supplied for an interval (for example, 10 minutes).

  For example, a current fuse and a thermal fuse are connected in series to the fuse portion 46. In the present embodiment, the current fuse is cut when a current larger than a predetermined current value flows. Further, in the present embodiment, the temperature fuse is cut when the temperature becomes higher than a predetermined temperature. When the current fuse or the thermal fuse is blown, power is not supplied from the battery 44 to the microcomputer 52, the short distance communication module 54, and the long distance communication module 56.

  The microcomputer 52 is a computer including a processor, a memory, and the like. The microcomputer 52 executes, for example, data processing processing such as format conversion and the like to add data indicating reception time to the length data received from the length measurement device 10.

  The short distance communication module 54 is, for example, a communication module such as a wireless LAN communication module that receives the length data transmitted from the length measurement device 10 via the built-in antenna.

  The long-distance communication module 56 is, for example, a communication module such as a 3G communication module or a low power wide area (LPWA) communication module that communicates with the computer network 16 such as the Internet via the built-in antenna. The telecommunication module 56 transmits, for example, data processed by the microcomputer 52 to the data storage server 14 via the computer network 16.

  Here, with reference to FIG. 3, an example of control of power supply timing in the length measuring device 10 and the relay device 12 will be described. In the present embodiment, power consumption can be suppressed by controlling the power supply timing as shown in FIG.

  As described above, in the length measurement device 10, power supply from the rechargeable battery 26 to the sensor unit 30a and the wireless communication unit 32 is performed every first time (at intervals of three minutes in the example of FIG. 3). Then, according to the power supply, activation of the sensor unit 30a and the wireless communication unit 32, measurement of the length from the position P1 of the zero point of the scale unit 30b to the position P2 of the measurement point by the sensor unit 30a, and the wireless communication unit 32 Transmission of length data indicating the length to the relay device 12 and stop of the sensor unit 30a and the wireless communication unit 32 are executed.

  Also, the microcomputer 52 of the relay apparatus 12, the short distance communication module 54, and the long distance communication module 56, every two hours, for a second time period longer than the above-mentioned first time (an example of FIG. 3 Power supply from the battery 44 is performed for 10 minutes). Then, the microcomputer 52, the near field communication module 54, and the telecommunication module 56 are activated, and the length data from the length measuring device 10 for the second time mentioned above (10 minutes in the example of FIG. 3) Processing such as transmission of the processed data to the data storage server 14 and the like. As illustrated in FIG. 3, the sensor unit 30 a of the length measuring device 10 during the 10 minutes in which the microcomputer 52 of the relay device 12, the short distance communication module 54, and the long distance communication module 56 are activated. And, the length data transmitted by the wireless communication unit 32 at an interval of 3 minutes can be received at least once. As a result, the length data is reliably transmitted from the length measuring device 10 to the relay device 12.

  Further, in the present embodiment, since the length measurement device 10 and the relay device 12 do not have to be always activated, the operation time can be reduced. Therefore, the power consumption of the length measuring device 10 and the relay device 12 can be suppressed.

  As shown in FIG. 1, the data storage server 14 includes, for example, a processor 14a, a storage unit 14b, and a communication unit 14c. The processor 14a is, for example, a program control device such as a CPU that operates according to a program installed in the data storage server 14. The storage unit 14 b is a storage element such as a ROM or a RAM, a hard disk drive, or the like. The storage unit 14 b stores, for example, programs executed by the processor 14 a. The communication unit 14 c is a communication interface such as a network board for exchanging data with the relay device 12 via the computer network 16, for example. The data accumulation server 14 transmits and receives information to and from the relay apparatus 12 via the communication unit 14 c.

  FIG. 4 is a functional block diagram showing an example of functions implemented by the data storage server 14 according to the present embodiment. In the data accumulation server 14 according to the present embodiment, not all the functions shown in FIG. 4 need to be implemented, and functions other than the functions shown in FIG. 4 may be implemented.

  As shown in FIG. 4, the data storage server 14 according to the present embodiment functionally includes, for example, an initial measurement width data storage unit 60, an initial measurement length data storage unit 62, a measurement length data reception unit 64, and width estimation. And a monitor data storage unit 68. The initial measurement width data storage unit 60, the initial measurement length data storage unit 62, and the monitor data storage unit 68 are mainly implemented with the storage unit 14b. The measurement length data receiving unit 64 is mainly implemented with the communication unit 14c. The width estimation unit 66 is mainly implemented with the processor 14a. The data storage server 14 plays a role as a gap width estimation device for estimating the gap width in the present embodiment.

  The above functions may be implemented by the processor 14a executing a program installed in the data storage server 14 which is a computer and including instructions corresponding to the above functions. This program may be supplied to the data storage server 14 via a computer readable information storage medium such as, for example, an optical disk, a magnetic disk, a magnetic tape, a magneto-optical disk, or a flash memory, or via the Internet or the like. .

  In the present embodiment, the initial measurement width data storage unit 60 stores, for example, an actual measurement value of the width of the gap measured in advance as initial measurement width data for each of the length measurement devices 10. Here, the user inputs the measured value of the width of the gap to a terminal capable of communicating with the data storage server 14. Then, the terminal transmits initial measured width data indicating the measured value to the data storage server 14. Then, the data accumulation server 14 stores the initial measurement width data received from the terminal in the initial measurement width data storage unit 60. The initial measured width data may include time data indicating the time of the timing when the measured value of the width of the gap is measured.

  In the present embodiment, for example, the initial measurement length data storage unit 62 stores, as initial measurement length data, length data measured by the length measurement apparatus 10 when the data are arranged across a gap. The initial measurement length data indicates the length between the above-mentioned first point and the above-mentioned second point at a predetermined initial timing. Here, for example, the position of the first point (for example, the position P1 of the zero point of the scale unit 30b) corresponds to the position P3 on the structure 100 to be associated. Here, the position P3 may be, for example, the position of the point of intersection of the line in the Z-axis direction passing through the position P1 and the structure 100. Further, the position of the second point (for example, the position P2 of the measurement point in the scale unit 30b) corresponds to the position P4 on the structure 100 to be associated. Here, the position P4 may be, for example, the position of the point of intersection of the line in the Z-axis direction passing through the position P2 and the structure 100. When the width of the gap is actually measured, the length measuring device 10 may be fixed to the structure 100. Then, initial measurement length data indicating the measurement value at this time may be transmitted from the length measurement device 10 to the data storage server 14 via the relay device 12. Then, the data accumulation server 14 may store the received initial measurement length data in the initial measurement length data storage unit 62. The initial measurement length data may include time data indicating a time corresponding to the above-mentioned initial timing.

  In the present embodiment, for example, the measurement length data reception unit 64 measures the first point and the second point at the comparison timing which is measured by the length measurement device 10 and which is later than the above-described initial timing. Receiving comparative measurement length data indicating a length between The comparative measurement length data includes, for example, time data and measurement length data. Here, the relay apparatus 12 may generate comparison measurement length data. In this case, for example, the value of the length data received by the relay device 12 from the length measuring device 10 and the value indicating the time when the length data was received are the values of the measured length data of the comparative measured length data, And, it may be set as a value of time data.

  In the present embodiment, for example, the width estimation unit 66 described above based on the actual measurement value of the width of the gap indicated by the initial measurement width data, the length indicated by the initial measurement length data, and the length indicated by the comparative measurement length data. Estimate the width of the gap at the comparison timing. Here, for example, a value obtained by adding the measured value of the gap width indicated by the initial measured width data to a value obtained by subtracting the length indicated by the initial measured length data from the length indicated by the comparative measured length data Alternatively, it may be estimated as a value indicating the width of the gap at the comparison timing.

  In addition, for example, when it is known in advance that there is a given relationship between the amount of change in width of the gap and the amount of change in length measured by the length measurement device 10, A width estimate may be performed. For example, it is known in advance that the change in the width of the gap is half of the change in the length measured by the length measuring device 10. In this case, the value obtained by subtracting the length indicated by the initial measurement length data from the length indicated by the comparative measurement length data divided by 2 is the value obtained by adding the measured value of the gap width indicated by the initial measured width data. It may be estimated as a value indicating the width of the gap at the comparison timing.

  Also, for example, when there is a time lag between the timing when the actual measurement value of the gap width is measured and the above-mentioned initial timing, estimation of the width of the gap may be performed in consideration of the influence of the time lag. For example, a value obtained by adding a measured value of the width of the gap indicated by the initial measured width data to a value obtained by subtracting the length indicated by the initial measured length data from the length indicated by the comparative measured length data It may be estimated as a value indicating the width of the gap in timing. Here, the predetermined value may be, for example, a value corresponding to the above time lag, such as a value obtained by multiplying the above time lag by a predetermined coefficient.

  Then, in the present embodiment, for example, the width estimation unit 66 generates monitor data illustrated in FIG. 5 and stores the monitor data in the monitor data storage unit 68. An example of a plurality of monitor data stored in the monitor data storage unit 68 is shown in FIG. As shown in FIG. 5, the monitor data includes, for example, time data, measurement length data, and gap width estimated value data. Here, for example, the width estimation unit 66 sets the value of the time data of the comparison measurement length data received by the measurement length data reception unit 64 and the value of the measurement length data respectively to the value of the time data included in the monitor data and , May be set as the value of measurement length data. Then, the width estimation unit 66 adds the value indicated by the initial measurement width data to the value obtained by subtracting the value of the initial measurement length data from the value of the measurement length data as the value of the gap width estimation value data of the monitor data. You may set a value.

  Hereinafter, an example of the flow of the process performed in the data accumulation server 14 according to the present embodiment will be described with reference to the flow diagram illustrated in FIG.

  First, the measurement length data receiving unit 64 stands by for comparison measurement length data transmitted from the relay device 12 (S101).

  When the measurement length data reception unit 64 receives the comparison measurement length data transmitted from the relay device 12, the width estimation unit 66 determines as described above based on the comparison measurement length data received by the measurement length data reception unit 64. Monitor data is generated (S102).

  Then, the width estimation unit 66 stores the monitor data generated in the process shown in S102 in the monitor data storage unit 68 (S103), returns to the process shown in S101, and the next comparison measurement length transmitted from the relay apparatus 12 Wait for data

  As described above, according to the data accumulation server 14 according to the present embodiment, the absolute amount of the width of the gap of the structure 100 can be grasped at a place away from the structure 100.

  Further, as shown in FIG. 6, the measurement length data receiving unit 64 may repeatedly receive the comparative measurement length data a plurality of times. Then, each time the comparative measurement length data is received, the width estimation unit 66 may estimate the width of the gap at the timing when the comparative measurement length data is acquired, based on the comparative measurement length data. In this way, it is possible to monitor the time-series transition of the absolute amount of the width of the gap of the structure 100 at a distance from the structure 100.

  In addition, according to the gap width data collection system 1 according to the present embodiment, it is possible to detect minute fluctuations of the gap in 0.01 mm units despite the simple configuration.

  Further, according to the gap width data collection system 1 according to the present embodiment, it is not necessary to receive power supply from a commercial power supply, so the degree of freedom in the installation place of the length measurement device 10 and the relay device 12 is high. In addition, since the exposed external wiring can be eliminated, the risk of electric leakage, ignition and the like can be reduced, and a qualified person of electrical work becomes unnecessary when installing the length measuring device 10 and the relay device 12.

  The present invention is not limited to the above-described embodiment. For example, in the case where the length measurement device 10 is installed at a position where no gap is generated, the value of the initial measurement width data may be set to 0 mm. Further, the gap in the present invention is not limited to the crack 101. The length measuring device 10 according to the present invention may be installed, for example, at a joint or a joint when a plurality of structures are joined.

  Further, for example, some or all of the functions shown in FIG. 4 may be implemented by the relay apparatus 12. For example, the relay apparatus 12 may execute the process of estimating the width of the gap at the comparison timing.

  Further, the above-described specific character strings and numerical values, and the specific character strings in the drawings are merely examples, and the present invention is not limited to these character strings and numerical values.

  Reference Signs List 1 gap width data collection system, 10 length measuring device, 12 relay devices, 14 data storage server, 14a processor, 14b storage unit, 14b communication unit, 16 computer network, 20 cases, 22 cases, 24 bellows, 26 rechargeable batteries, 28 base, 30 length measuring device, 30a sensor unit, 30b scale unit, 32 wireless communication unit, 34 solar panel, 40 solar panel, 42 charge controller, 44 battery, 46 fuse unit, 48 program timer, 50 converter, 52 Microcomputer, 54 short distance communication module, 56 long distance communication module, 60 initial measurement width data storage unit, 62 initial measurement length data storage unit, 64 measurement length data reception unit, 66 width estimation unit, 68 monitor data storage unit, 100 Structure, 101 Cracked, 102 posts.

Claims (4)

A sensor unit installed in a structure that measures the width of the gap of the structure directly or indirectly when receiving power supply from a battery, and wirelessly transmits measurement data indicating the measurement result by the sensor unit A measuring unit having a transmitting unit;
A receiving unit having a receiving unit that receives the measurement data transmitted by the transmitting unit of the measuring device when receiving power supply from a battery, and a storage unit that stores the measurement data;
The measurement device measures the width of the gap by the sensor unit and the measurement data indicating the measurement result of the measurement by the transmission unit according to the power supply from the battery received every first time. Send to the receiving device,
The receiver supplies power to the receiver for a second time which is longer than the first time.
A gap width data acquisition system characterized by The measuring device further includes a scale unit installed in the structure across the gap and movable in a predetermined direction;
The sensor unit measures a length between a first point and a second point across the gap in the scale when installed on the structure.
The transmission unit transmits the measurement data indicating a length between the first point and the second point.
The gap width data acquisition system according to claim 1, characterized in that: Measured width data storage means for storing measured width data indicating measured values of the width of the gap of the structure;
Initial measurement length data storage means for storing initial measurement length data indicating a length between the first point and the second point across the gap at a predetermined initial timing, which is measured by the measurement device ,
Receiving comparative measurement length data receiving comparative measurement length data indicating the length between the first point and the second point at the comparison timing which is measured by the measurement device and which is later than the initial timing Means,
The width of the gap at the comparison timing is estimated based on the measured value of the width of the gap indicated by the measured width data, the length indicated by the initial measurement length data, and the length indicated by the comparative measurement length data. A gap width estimation device having width estimation means;
The gap width data acquisition system according to claim 2, characterized in that: A procedure for storing measured width data indicating measured values of the gap width of the structure in the measured width data storage means;
Initial measurement length data indicating the length between the first point and the second point across the gap at a predetermined initial timing, as measured by a measuring device placed across the gap, to the initial measurement length data Procedure to be stored in storage means,
A procedure of receiving comparison measurement length data indicating a length between the first point and the second point at a comparison timing that is measured by the measurement device and which is later than the initial timing;
The width of the gap at the comparison timing is estimated based on the measured value of the width of the gap indicated by the measured width data, the length indicated by the initial measurement length data, and the length indicated by the comparative measurement length data. procedure,
A program for causing a computer to execute a gap width estimation program.

Images