Building damage detection system

Abstract

To provide a building damage detection system capable of accurately detecting damage of a building.SOLUTION: The building damage detection system 100 includes a detection unit 120 and an information acquisition device 90. The detection unit 120 is provided on the brace 20 of the frame 10 of the building 1. The brace 20 is a following member whose length changes following the deformation of the frame 10 when the building 1 shakes. The detection unit 120 includes a communication unit A and a detection circuit B. The detection circuit B includes a section to be cut S that is cut when the length of the brace 20 changes beyond a predetermined allowable length. The communication unit A can supply a current to the detection circuit B. The communication unit A has a different communication mode with the information acquisition device 90 in the conductive state in which the target section S is not cut from that in the cut state in which the target section S is cut.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The disclosed technology relates to a building damage detection system that detects damage to a building. [Background technology]

[0002] The frames of buildings such as houses may become deformed when the building is shaken by an earthquake or the like. A building whose frame has become deformed is at a higher risk of collapsing. For this reason, it is desirable to be able to detect the extent of damage to a building that has been shaken by the shaking. For example, Patent Document 1 discloses a technology that uses a measuring device to measure the displacement of components installed in a building and determines the condition of the building based on the amount of displacement measured. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-159601 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, after a building frame is deformed in response to shaking, it may return to the same state it was in before the shaking occurred. Even if a frame that has been deformed by shaking returns to its original shape before the shaking occurred, the frame may still be damaged, as it has still been subjected to a large load.

[0005] As with the above-mentioned conventional technology, in order to determine the exact damage status of a building by measuring the displacement of the building, it is necessary to constantly measure the displacement of the building at as short a time interval as possible. This is because the amount of displacement at the time of the largest displacement during the shaking must be obtained even when the building returns to the same state as before the shaking. However, depending on the time interval at which the amount of displacement is obtained, there is a possibility that the amount of displacement at the time of the largest displacement cannot be properly obtained. In other words, there is a possibility that the damage to the building cannot be accurately detected.

[0006] The disclosed technique provides a building damage detection system that can accurately detect damage to a building. [Means for solving the problem]

[0007] One aspect of the disclosed technology is a building damage detection system that detects damage to a building having a frame made up of a plurality of frame members arranged to intersect with other frame members, the building damage detection system comprising: a detection unit that is attached to a follower member whose length changes in accordance with the deformation of the frame when shaking occurs in the building and is capable of detecting the extent of damage to the building; and an information acquisition device that is capable of acquiring information indicating the extent of damage to the building based on the results of communication with the detection unit, the detection unit having a detection circuit having a section to be cut that will be cut when the length of the follower member changes beyond a predetermined allowable change length; and a communication unit that is capable of passing current through the detection circuit and that communicates with the information acquisition device in a different manner when the section to be cut is in a conductive state where it is not cut than when it is in a cut state where it is cut.

[0008] This building damage detection system can detect damage to a building based on the fact that the section to be cut has been cut. Even if the frame returns to its original shape after deformation, the section to be cut will not become conductive once it has been cut. Therefore, this building damage detection system can accurately detect damage to a building. [Effects of the Invention]

[0009] According to the disclosed technique, a building damage detection system capable of accurately detecting damage to a building is provided. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram showing an example of an object for which damage is detected by a building damage detection system according to an embodiment. FIG. [Figure 2] 1 is a schematic configuration diagram of a building damage detection system according to a first embodiment. [Figure 3] FIG. 2 is a diagram illustrating an example of a section to be cut in the building damage detection system according to the first embodiment. [Figure 4] 1 is a diagram showing an example of antenna arrangement in the building damage detection system according to the first embodiment. FIG. [Figure 5] FIG. 10 is a schematic configuration diagram of a building damage detection system according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments embodying the present disclosure will be described in detail with reference to the accompanying drawings. First, a first embodiment, which is one of the embodiments, will be described, and then other embodiments different from the first embodiment will be described.

[0012] First Embodiment FIG. 1 shows a frame 10 of a building 1 that is the target for damage detection by the system according to this embodiment. The frame 10 of the building 1 is composed of frame members 11, 12, 13, and 14 as structural members. The frame members 11 and 12 are columns that extend vertically. The frame member 13 is a foundation that extends horizontally. The frame member 14 is a cross member that extends horizontally. The frame members 13 and 14 are arranged with a gap between them in the vertical direction.

[0013] Frame 10 is formed by connecting frame members 13 and 14 with frame members 11 and 12. Therefore, frame members 11, 12, 13, and 14 in frame 10 are arranged so as to intersect with each other. Frame 10 is provided with appropriate walls that separate the space enclosed by frame members 11, 12, 13, and 14 from the outside.

[0014] The frame 10 is provided with braces 20 that function as reinforcing members for the frame 10. The braces 20 are provided on the diagonals of the rectangular portion of the frame 10. Therefore, the braces 20 are provided within the space surrounded by the frame members 11, 12, 13, and 14 of the frame 10. The braces 20 in this embodiment are configured to include seismic dampers 21.

[0015] The seismic damper 21 has a tube 22 and a rod 23. The tube 22 has a hollow cylindrical shape. A portion of the rod 23 is inserted inside the tube 22. The brace 20 has a first extension member 24 and a second extension member 25 that connect both ends of the seismic damper 21 in the longitudinal direction to the frame 10, respectively. The first extension member 24 connects the frame 10 and the tube 22. The second extension member 25 connects the frame 10 and the rod 23. Note that the brace 20 may be configured to connect the seismic damper 21 directly to the frame 10.

[0016] When the building 1 shakes and the frame 10 is deformed, the rod 23 of the seismic damper 21 moves in and out of the tube 22. In other words, the length of the seismic damper 21 changes in response to the deformation of the frame 10. Therefore, the brace 20 is a compliant member whose length L changes in response to the deformation of the frame 10.

[0017] In the seismic damper 21, viscoelastic rubber is provided between the tube 22 and the rod 23. The seismic damper 21 can convert the kinetic energy generated when its length in the longitudinal direction changes into thermal energy. This allows the seismic damper 21 to suppress deformation of the frame 10. Therefore, the brace 20 can reduce damage to the building 1.

[0018] FIG. 2 shows a schematic configuration diagram of a building damage detection system 100 according to this embodiment. As shown in FIG. 2, the building damage detection system 100 includes a building-mounted unit 110 and an information acquisition device 90. The building-mounted unit 110 is attached to the building 1. As shown in FIG. 1, the building-mounted unit 110 of this embodiment is provided on a brace 20. The information acquisition device 90 is a device that can be carried by an inspector who inspects damage to the building 1. The information acquisition device 90 of this embodiment can communicate with each unit provided in the building-mounted unit 110 by electromagnetic waves (radio waves or magnetic fields). In other words, the building damage detection system 100 of this embodiment is a system in which the information acquisition device 90 and each unit provided in the building-mounted unit 110 can communicate without contact.

[0019] The building installation unit 110 has a detection unit 120. The detection unit 120 can detect damage to the building 1. The detection unit 120 of this embodiment has multiple combinations of a communication unit A and a detection circuit B. The detection unit 120 has, as the communication unit A, a first communication unit A11, a second communication unit A12, and a third communication unit A13. The detection unit 120 has, as the detection circuit B, a first detection circuit B11, a second detection circuit B12, and a third detection circuit B13.

[0020] Each of the multiple communication units A has a communication control unit 131, a memory 132, and an antenna 133. The communication control unit 131 executes various processes, for example, in accordance with a program read from the memory 132. The communication control unit 131 of this embodiment can read the program from the memory 132 based on reception from the antenna 133. Specifically, the communication control unit 131 can perform a process of causing a current to flow through the detection circuit B.

[0021] The memory 132 stores a program related to the processing performed by the communication control unit 131. The memory 132 can also store various types of data. For example, the memory 132 in this embodiment has an area for storing data indicating that a current has flowed through the detection circuit B.

[0022] The antenna 133 is capable of communicating with the information acquisition device 90 by electromagnetic waves. That is, the antenna 133 is capable of receiving information from the information acquisition device 90 and transmitting information to the information acquisition device 90. Furthermore, the antenna 133 of this embodiment is capable of generating electric power when it receives electromagnetic waves from the information acquisition device 90. Specifically, when the information acquisition device 90 and the antenna 133 communicate by radio waves, the antenna 133 rectifies the radio waves received from the information acquisition device 90 to generate electric power. The communication control unit 131 and the memory 132 of this embodiment can operate by the electric power generated in the antenna 133.

[0023] The detection circuit B is an electric circuit connected to the communication control unit 131 of the communication unit A. A first detection circuit B11 is connected to the communication control unit 131 of the first communication unit A11. A second detection circuit B12 is connected to the communication control unit 131 of the second communication unit A12. A third detection circuit B13 is connected to the communication control unit 131 of the third communication unit A13.

[0024] Each of the detection circuits B has a portion to be cut S. Specifically, the first detection circuit B11 has a first portion to be cut S11. The second detection circuit B12 has a second portion to be cut S12. The third detection circuit B13 has a third portion to be cut S13. Therefore, in the detection unit 120 of this embodiment, a first communication unit A11, a second communication unit A12, and a third communication unit A13 are provided for each of the first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13.

[0025] The portion to be cut S is cut when the length L of the brace 20 changes beyond a predetermined allowable change length. The first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13 each have a different allowable change length. Specifically, the allowable change length for the first portion to be cut S11 is shorter than the allowable change length for the second portion to be cut S12. Furthermore, the allowable change length for the second portion to be cut S12 is shorter than the allowable change length for the third portion to be cut S13. Therefore, in the detection unit 120 of this embodiment, when the length L of the brace 20 increases, the first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13 are cut in this order.

[0026] 3 shows a specific example of the portion to be cut S. The portion to be cut S can be formed by fixing one end of a conductor constituting the detection circuit B to the tube 22 of the seismic damper 21 and the other end to the rod 23 of the seismic damper 21, as shown in FIG.

[0027] 3, the tube 22 sides of the first detection circuit B11, the second detection circuit B12, and the third detection circuit B13 are all fixed to the tube 22 by tube-side fixing parts 151. The rod 23 sides of the first detection circuit B11, the second detection circuit B12, and the third detection circuit B13 are all fixed to the rod 23 by rod-side fixing parts 152. Therefore, when the seismic damper 21 extends in its longitudinal direction, each detection circuit B is cut at the intended cutting part S between the tube-side fixing part 151 and the rod-side fixing part 152.

[0028] 3, the length from the tube side fixed portion 151 to the rod side fixed portion 152 along the first detection circuit B11 is shorter than the length from the tube side fixed portion 151 to the rod side fixed portion 152 along the second detection circuit B12. The length from the tube side fixed portion 151 to the rod side fixed portion 152 along the second detection circuit B12 is shorter than the length from the tube side fixed portion 151 to the rod side fixed portion 152 along the third detection circuit B13. As a result, when the length L of the brace 20 is increased, the first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13 are cut in this order.

[0029] Next, we will explain the operation of the building damage detection system 100 when inspecting the building 1. In the building damage detection system 100, inspection of the building 1 is started by starting communication from the information acquisition device 90 to the building installation unit 110. In response to receiving a signal from the information acquisition device 90 to start an inspection of damage to the building 1, the communication unit A can pass a current to the detection circuit B. Then, in response to the current passing through the connected detection circuit B, the communication unit A can send a signal indicating the results of the inspection to the information acquisition device 90.

[0030] Specifically, when the communication control unit 131 of the communication unit A receives an inspection start signal from the information acquisition device 90 via the antenna 133, it starts operating using the power generated in response. Furthermore, the communication control unit 131, to which the power generated by the antenna 133 is supplied, causes a current to flow through the connected detection circuit B. When a current flows through the detection circuit B, the communication control unit 131 stores non-disconnection information in the memory 132, which is information indicating that the section S to be disconnected of the detection circuit B has not been disconnected. The non-disconnection information indicates that the section S to be disconnected of the detection circuit B is in a conductive state and not disconnected due to the current flowing through the detection circuit B. Furthermore, the communication control unit 131 reads out the non-disconnection information stored in the memory 132 and transmits the read non-disconnection information to the information acquisition device 90 via the antenna 133 as a signal indicating the result of the inspection.

[0031] On the other hand, when no current flows through the connected detection circuit B, the communication unit A does not transmit non-disconnection information to the information acquisition device 90. Specifically, the communication control unit 131 of this embodiment can be configured not to operate when the section S to be disconnected of the connected detection circuit B is in a disconnected state because no current flows through the detection circuit B.

[0032] In other words, when the section to be cut S is in a conductive state, the communication unit A transmits non-cut information to the information acquisition device 90, and when the section to be cut S is in a disconnected state, the communication unit A does not respond to the information acquisition device 90. In this way, the communication unit A of this embodiment communicates with the information acquisition device 90 in different ways when the section to be cut S is in a conductive state and when it is in a disconnected state. The building damage detection system 100 of this embodiment employs RFID (Radio Frequency Identification).

[0033] That is, in this embodiment, the communication unit A is an RF tag. The information acquisition device 90 is an RFID reader capable of communicating with RF tags. The building damage detection system 100 of this embodiment employs a passive type RFID. Therefore, the building installation unit 110 does not require a power source. This allows the building damage detection system 100 to inspect the building 1 even if, for example, the area including the building 1 experiences a power outage.

[0034] The detecting section 120 of this embodiment has a plurality of communication sections A, each provided for a plurality of portions to be cut S having a different allowable change length. Therefore, the information acquiring device 90 can acquire information as to which portions to be cut S have an allowable change length that is in a conductive state, based on communication with the plurality of communication sections A of the detecting section 120. Furthermore, the information acquiring device 90 can acquire information as to which portions to be cut S have an allowable change length that is in a cut state, based on communication with the plurality of communication sections A of the detecting section 120.

[0035] In this embodiment, the allowable change lengths of the multiple sections to be cut S are each set to a length that can indicate the degree of damage to the building 1. Specifically, the length of the first section to be cut S11 is set to the length at which the frame 10 is cut when it has deformed to the extent that minor damage occurs to the building 1. The length of the third section to be cut S13 is set to the length at which the frame 10 is cut when it has deformed to the extent that severe damage occurs to the building 1. Furthermore, the length of the second section to be cut S12 is set to the length at which the frame 10 is cut when it has deformed to the extent that moderate damage between minor and severe occurs to the building 1.

[0036] Therefore, the information acquisition device 90 of this embodiment can acquire different information depending on the number of conductive parts among the multiple parts to be cut S by communicating with the communication unit A. Then, based on the results of the communication between the communication unit A and the information acquisition device 90, the extent of damage to the building 1 can be acquired.

[0037] That is, if the communication result indicates that the first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13 are all in a conductive state, it can be determined that the damage to the building 1 is less than minor, or that there is no damage to the building 1. Note that if the communication result indicates that at least the first portion to be cut S11 is in a conductive state, it can also be determined that the damage to the building 1 is less than minor, or that there is no damage to the building 1.

[0038] Furthermore, if the communication result indicates that the first portion to be cut S11 is in a cut state and that the second portion to be cut S12 and the third portion to be cut S13 are in a conductive state, it can be determined that the damage to the building 1 is minor. Note that if the communication result indicates that at least the first portion to be cut S11 is in a cut state and the second portion to be cut S12 is in a conductive state, it can also be determined that the damage to the building 1 is minor.

[0039] If the communication result indicates that the first portion to be cut S11 and the second portion to be cut S12 are in a cut state and that the third portion to be cut S13 is in a conductive state, it can be determined that the damage to the building 1 is moderate. Note that if the communication result indicates that at least the second portion to be cut S12 is in a cut state and the third portion to be cut S13 is in a conductive state, it can also be determined that the damage to the building 1 is moderate.

[0040] If the communication result indicates that the first section to be cut S11, the second section to be cut S12, and the third section to be cut S13 are all in a cut state, it can be determined that the damage to the building 1 is severe. Note that if the communication result indicates that at least the third section to be cut S13 is in a cut state, it can also be determined that the damage to the building 1 is severe.

[0041] The determination of the degree of damage to the building 1 based on the results of communication between the communication unit A and the information acquisition device 90 can be performed, for example, by the information acquisition device 90. Furthermore, for example, the determination of the degree of damage to the building 1 can also be performed by another computer that acquires the results of communication between the communication unit A and the information acquisition device 90 from the information acquisition device 90.

[0042] In this way, the building damage detection system 100 of this embodiment can detect damage to the building 1 based on the fact that the section S to be cut has been cut. Even if the frame 10 of the building 1 is deformed when shaking, it may subsequently return to its original shape before the deformation. In such a case, the building 1 may appear to be undamaged at first glance. However, in reality, the deformation of the frame 10 may increase the likelihood that the building 1 will subsequently collapse. In the building damage detection system 100 of this embodiment, even if the frame 10 returns to its shape before the deformation after deformation, the cut section S to be cut will not become conductive. Therefore, the building damage detection system 100 of this embodiment can accurately detect damage to the building 1.

[0043] The degree of damage (mild, medium, severe) to the building 1 detected by the building damage detection system 100 can be set according to the classification specified in, for example, earthquake insurance or public support systems (subsidies, grants). This allows the owner of the building 1 to receive appropriate relief from earthquake insurance or public support systems at an early stage.

[0044] Furthermore, for example, the degree of each damage to the building 1 detected by the building damage detection system 100 can be set according to the purpose. Specifically, the degree of each damage to the building 1 detected by the building damage detection system 100 can be set according to whether it is possible to enter the interior of the building 1 and the possibility of the building collapsing due to subsequent shaking. This allows for early and appropriate determination as to whether people remaining inside the building 1 damaged by the earthquake can be rescued and whether residents can continue living in the building 1 after the earthquake.

[0045] 2, the building installation unit 110 of this embodiment is provided with a confirmation unit X. That is, the confirmation unit X is provided in the same brace 20 as the detection unit 120. In this embodiment, a plurality of confirmation units X are provided. Specifically, a first confirmation unit X11 and a second confirmation unit X12 are provided as the confirmation units X. In addition, a confirmation circuit Y is connected to each of the confirmation units X of this embodiment.

[0046] Each confirmation unit X has a confirmation control unit 141, a memory 142, and an antenna 143. The confirmation control unit 141 executes various processes, for example, in accordance with a program read from the memory 142. The confirmation control unit 141 of this embodiment can read a program from the memory 142 based on reception from the antenna 143. Specifically, the confirmation control unit 141 can execute a process of passing a current through the confirmation circuit Y.

[0047] The memory 142 stores a program related to the processing performed by the verification control unit 141. The memory 142 can also store various data. For example, the memory 142 in this embodiment has an area for storing data indicating that a current has flowed through the verification circuit Y.

[0048] The antenna 143 is capable of communicating with the information acquisition device 90 by electromagnetic waves. The antenna 143 of this embodiment can generate power when it receives electromagnetic waves from the information acquisition device 90. In this respect, it is similar to the antenna 133 of the communication control unit 131 described above. Furthermore, the confirmation unit X can be an RF tag of the same type as the communication unit A.

[0049] The confirmation circuit Y is an electric circuit connected to the confirmation control unit 141 of the confirmation unit X. The first confirmation circuit Y11 is connected to the confirmation control unit 141 of the first confirmation unit X11. The second confirmation circuit Y12 is connected to the communication control unit 131 of the second confirmation unit X12.

[0050] The confirmation unit X of this embodiment can pass a current to the confirmation circuit Y in response to receiving a signal from the information acquisition device 90 to start an inspection of damage to the building 1. Then, in response to the current passing through the connected confirmation circuit Y, the confirmation unit X can send a signal to the information acquisition device 90 indicating that the inspection has started normally.

[0051] The confirmation circuit Y does not have a configuration similar to the section to be cut S of the detection circuit B. That is, for example, even if the brace 20 is extended to a length that cuts the third section to be cut S13 of the detection circuit B, the confirmation circuit Y remains conductive. Therefore, the confirmation unit X can properly communicate with the information acquisition device 90 even if shaking occurs in the building 1 that cuts the third section to be cut S13. As a result, the result of communication between the confirmation unit X and the information acquisition device 90 can be used to confirm that the information acquisition device 90 is in a state where it can properly communicate with the building-installed unit 110.

[0052] That is, for example, if all of the parts to be cut S are in a cut state, the communication unit A of the detection unit 120 of this embodiment cannot respond to communication from the information acquisition device 90. Furthermore, for example, if the distance between the antenna 133 and the information acquisition device 90 is too great, a communication failure occurs in which communication from the information acquisition device 90 to the communication unit A does not start properly. Then, if communication from the information acquisition device 90 to the communication unit A starts but there is no response from the communication unit A, it is difficult to determine whether all of the parts to be cut S are in a cut state or whether there is a communication failure in which communication between the information acquisition device 90 and the communication unit A is not being performed properly. In other words, if only the communication unit A is provided in the building installation unit 110, an inspection error may occur due to a communication failure.

[0053] In contrast, in the building damage detection system 100 of this embodiment, which is provided with the confirmation unit X, even when all of the parts to be cut S are in a disconnected state, it is possible for the information acquisition device 90 and the confirmation unit X to communicate appropriately. If the information acquisition device 90 starts communication with the building installation unit 110 but no response is confirmed from the confirmation unit X, it can be determined that there is a communication failure, in which the information acquisition device 90 is not communicating appropriately with the building installation unit 110. In other words, even when all of the parts to be cut S are in a disconnected state, by confirming communication between the information acquisition device 90 and the confirmation unit X, it is possible to prevent inspection errors due to communication failure.

[0054] In this embodiment, the antennas 133, 143 of the building installation unit 110 are arranged side by side along the wall surface inside the wall of the frame 10 on which the braces 20 of the building 1 are installed. The antenna 143 of the confirmation unit X is preferably arranged in close proximity to at least one of the multiple antennas 133 of the communication unit A. This is because being able to confirm communication between the information acquisition device 90 and the antenna 143 of the confirmation unit X allows the inspector to know that the antenna 133 of the communication unit A is located nearby. Furthermore, it is preferable that all of the multiple antennas 133 of the communication unit A are arranged in close proximity to the antennas 133 of the other communication units A. This is because communication between the information acquisition device 90 and the antennas 133 of all communication units A can be more appropriately initiated.

[0055] Furthermore, in this embodiment, two confirmation units X are provided. The arrangement of antenna 133 of communication unit A and antenna 143 of confirmation unit X in this embodiment in which these two confirmation units X are provided is shown in Fig. 4. As shown in Fig. 4, in this embodiment, multiple antennas 133 of communication unit A are arranged between the two antennas 143 of confirmation unit X. This arrangement makes it easy to find antenna 133 of communication unit A by confirming communication with the two confirmation units X.

[0056] 4, the antenna 143 of the first confirmation unit X11, the antenna 133 of the first communication unit A11, the antenna 133 of the second communication unit A12, the antenna 133 of the third communication unit A13, and the antenna 143 of the second confirmation unit X12 are arranged in this order from top to bottom. Each of the antennas 133, 143 is provided in close proximity to its adjacent antenna. In this embodiment in which the antennas 133, 143 are arranged in this manner, when inspecting damage to the building 1, the information acquisition device 90 simply starts communication with each of the antennas 133, 143 in order, starting from one of the antennas 143 of the two confirmation units X to the other antenna 143.

[0057] 4 shows an example in which the information acquisition device 90 starts communication in the following order: antenna 143 of first confirmation unit X11, antenna 133 of first communication unit A11, antenna 133 of second communication unit A12, antenna 133 of third communication unit A13, and antenna 143 of second confirmation unit X12. Since communication with both of the two antennas 143 of confirmation unit X was performed properly, it can be determined that proper communication was possible with all of the multiple antennas 133 of communication unit A. Therefore, for communication unit A that does not respond, it can be determined that there is not a communication failure, but that the disconnection-scheduled unit S of the connected detection circuit B is in a disconnected state.

[0058] In this way, in the building damage detection system 100 of this embodiment, inspection errors due to poor communication can be reduced by the confirmation unit X. Therefore, in the building damage detection system 100 of this embodiment, damage to the building 1 can be detected more accurately.

[0059] As described above in detail, the building damage detection system 100 according to the embodiment is a system capable of detecting damage to a building 1 having a frame 10. The frame 10 is composed of multiple frame members 11, 12, 13, and 14 arranged so as to intersect with other frame members. The frame 10 has a brace 20. The brace 20 is a compliant member whose length changes in response to deformation of the frame 10 when shaking occurs in the building 1. The building damage detection system 100 also includes a detection unit 120 and an information acquisition device 90. The detection unit 120 includes a communication unit A and a detection circuit B. The detection circuit B includes a section S to be cut that is cut when the length of the brace 20 changes beyond a predetermined allowable length. The communication unit A is capable of passing a current through the detection circuit B. Furthermore, the communication unit A communicates with the information acquisition device 90 in a manner different from when the section S to be cut is in a conductive state (i.e., not cut) than when the section S to be cut is in a cut state (i.e., cut). This realizes a building damage detection system 100 that can accurately detect damage to the building 1.

[0060] Second Embodiment Next, a second embodiment different from the above embodiment will be described. In the second embodiment, the configuration of the detection unit is different from the above embodiment. That is, the detection unit of this embodiment can obtain a value indicating the number of portions to be cut that are in a cut state according to the electrical resistance of the detection circuit. Below, the differences from the above embodiment will be described.

[0061] A schematic configuration diagram of a building damage detection system 200 according to this embodiment is shown in Fig. 5. As shown in Fig. 5, the building damage detection system 200 includes a building-installed unit 210. The building-installed unit 210 of this embodiment is also provided on the brace 20 of the building 1. The building damage detection system 200 of this embodiment is also a system in which the information acquisition device 90 and the units provided in the building-installed unit 210 can communicate with each other without contact.

[0062] The building installation unit 210 has a detection unit 220. The detection unit 220 has a communication unit A21, a detection circuit B20, a disconnection number index value acquisition unit 240, and a power supply unit 250. The communication unit A21 of this embodiment also has a communication control unit 231, a memory 232, and an antenna 233. In this embodiment, the communication unit A21 can also use the same type of RF tag as the communication unit A of the above embodiment.

[0063] In this embodiment, the detection circuit B20 also has a plurality of portions to be cut S. In the detection circuit B20 of this embodiment, the plurality of portions to be cut S are connected in parallel to one another. Specifically, the first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13 are each connected in parallel to the other portions to be cut S.

[0064] In this embodiment, the first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13 each have a different allowable change length, as in the above embodiment. Also in this embodiment, when the length L of the brace 20 increases, the first portion to be cut S11, the second portion to be cut S12, and the third portion to be cut S13 are cut in this order. The portions to be cut S can be fixed to the brace 20 in the same manner as in the above embodiment.

[0065] In the detection circuit B20 of this embodiment, the electrical resistance differs depending on the number of portions to be cut S in the cut state. The combined resistance value of the detection circuit B20 differs depending on whether all portions to be cut S are in the conductive state, whether there is one portion to be cut S in the cut state, whether there are two portions to be cut S in the cut state, or whether all portions to be cut S are in the cut state. Therefore, in this embodiment, the number of portions to be cut S in the cut state can be determined based on the combined resistance value of the detection circuit B20.

[0066] Furthermore, the detection circuit B20 of this embodiment is provided with a resistor R connected in series with each of the multiple portions to be cut S. Specifically, the first resistor R21 is connected in series with the first portion to be cut S11. The second resistor R22 is connected in series with the second portion to be cut S12. The third resistor R23 is connected in series with the third portion to be cut S13. Note that each resistor R is connected in parallel with the portions to be cut S other than the portion to be cut S connected in series with it. That is, the first resistor R21 is connected in parallel with the second portion to be cut S12 and the third portion to be cut S13, respectively. The second resistor R22 is connected in parallel with the first portion to be cut S11 and the third portion to be cut S13, respectively. The third resistor R23 is connected in parallel with the first portion to be cut S11 and the second portion to be cut S12, respectively.

[0067] The disconnection number index value acquisition unit 240 is connected to the communication control unit 231, the detection circuit B20, and the power supply unit 250. The disconnection number index value acquisition unit 240 can perform a process of flowing a current to the detection circuit B20. The disconnection number index value acquisition unit 240 can also acquire a combined resistance index value that indicates the value of the combined resistance of the detection circuit B20 when a current flows through the detection circuit B20.

[0068] The combined resistance index value is, for example, the value of the electrical resistance of the detection circuit B20. Furthermore, for example, if the disconnection number index value acquisition unit 240 applies a constant voltage to the detection circuit B20, the combined resistance index value of the detection circuit B20 may be, for example, the current value of the current flowing through the detection circuit B20.

[0069] Furthermore, the cut number index value acquisition unit 240 acquires a cut number index value that indicates the number of cut portions S that are in a cut state, based on the combined resistance index value of the detection circuit B20. The cut number index value is one of four different pieces of information that correspond to different combined resistance index values ​​depending on the number of cut portions S that are in a cut state. Therefore, the cut number index value is information that indicates the degree of damage (light, medium, severe) to the building 1.

[0070] The disconnection count index value acquisition unit 240 can transmit the acquired disconnection count index value to the communication control unit 231. The communication control unit 231 can store the disconnection count index value received from the disconnection count index value acquisition unit 240 in the memory 232. When the communication control unit 231 receives the disconnection count index value from the disconnection count index value acquisition unit 240, if there is a disconnection count index value already stored in the memory 232, the communication control unit 231 in this embodiment updates that value. As a result, the latest disconnection count index value is always stored in the memory 232.

[0071] The power supply unit 250 can supply power to each unit of the detection unit 220. Specifically, the power supply unit 250 in this embodiment supplies power to the disconnection number index value acquisition unit 240. The disconnection number index value acquisition unit 240 can operate using the power supplied from the power supply unit 250. Furthermore, the disconnection number index value acquisition unit 240 can pass the current supplied from the power supply unit 250 to the detection circuit B20.

[0072] The power supply unit 250 is connected to an external AC power source. In this embodiment, the power supply unit 250 is equipped with a battery that can be charged by the external power source during normal operation when power is supplied from the external power source. In the event of a power outage when the power supply from the AC power source is cut off, the power supply unit 250 can supply power stored in the battery to each component of the detection unit 220. For example, the power supply unit 250 can be of a pass-through type that can supply power to each component of the detection unit 120 by discharging an internal battery while charging it when power is supplied from the external power source. Note that the power supply unit 250 is not limited to a pass-through type, and may also be one with a UPS (Uninterruptible Power Supply) function.

[0073] Next, we will explain the operation of the building damage detection system 200 for each situation when inspecting the building 1. First, we will explain the case where an inspection to detect damage to the building 1 is performed using the information acquisition device 90 during normal times when power is being supplied from an external power source to the power supply unit 250.

[0074] When the information acquisition device 90 starts communicating with the detection unit 220 under normal circumstances, the communication unit A21 starts operating using power generated in response to receiving an inspection start signal from the information acquisition device 90 via the antenna 233. The communication control unit 231, which is supplied with power generated by the antenna 233, instructs the connected disconnection number index value acquisition unit 240 to pass a current through the detection circuit B20. The disconnection number index value acquisition unit 240 passes a current through the detection circuit B20 and acquires a resistance index value of the detection circuit B20. Furthermore, the disconnection number index value acquisition unit 240 makes a determination based on the acquired resistance index value and acquires a disconnection number index value.

[0075] The disconnection number index value acquisition unit 240 transmits the acquired disconnection number index value to the communication control unit 231 of the communication unit A21. The communication control unit 231 stores the received disconnection number index value in the memory 232. Furthermore, the communication control unit 231 reads out the disconnection number index value stored in the memory 232 and transmits the read disconnection number index value to the information acquisition device 90 via the antenna 233 as a signal indicating the result of the inspection. As a result, in the building damage detection system 200, when the information acquisition device 90 starts communicating with the detection unit 220 during normal operation, the information acquisition device 90 can acquire the latest disconnection number index value. Therefore, the degree of damage to the building 1 can be determined based on the disconnection number index value.

[0076] Furthermore, in the event of a power outage in which the power supply from the external power source to the power supply unit 250 is interrupted, the power supply unit 250 transmits a signal indicating the occurrence of a power outage to the disconnection number index value acquisition unit 240. Based on the occurrence of a power outage, the disconnection number index value acquisition unit 240 causes a current to flow through the detection circuit B20 and acquires a resistance index value of the detection circuit B20. Furthermore, the disconnection number index value acquisition unit 240 makes a determination based on the acquired resistance index value and acquires a disconnection number index value. The disconnection number index value acquisition unit 240 transmits the acquired disconnection number index value to the communication control unit 231 of the communication unit A21. The communication control unit 231 stores the received disconnection number index value in the memory 232. As a result, in the building damage detection system 200, in the event of a power outage, the disconnection number index value at the time of the power outage can be stored in the memory 232.

[0077] When the information acquisition device 90 starts communicating with the detection unit 220 during a power outage, if the power supply unit 250 has stored enough power to acquire another disconnection number index value, the detection unit 220 operates in the same manner as under normal circumstances. That is, the detection unit 220 acquires a disconnection number index value based on the resistance index value of the detection circuit B20 acquired using the power stored in the power supply unit 250, and transmits the acquired disconnection number index value to the information acquisition device 90. As a result, in the building damage detection system 200, if the power supply unit 250 has stored enough power, the information acquisition device 90 can acquire the latest disconnection number index value even during a power outage.

[0078] On the other hand, if there is insufficient power stored in the power supply unit 250 to acquire another disconnection number index value during a power outage, only the communication unit A21 operates when the information acquisition device 90 starts communicating with the detection unit 220. In this case, the communication control unit 231 of the communication unit A21 transmits the disconnection number index value at the time of the power outage, which is stored in the memory 232, to the information acquisition device 90 via the antenna 233 as a signal indicating the inspection result. This allows the building damage detection system 200 to acquire the most recent disconnection number index value possible, even when the information acquisition device 90 starts communicating with the detection unit 220 during a power outage.

[0079] Furthermore, the detection circuit B20 of this embodiment is provided with a resistor R. This increases the difference in the detected combined resistance value when the number of cut portions S in the cut state is different. In other words, if the resistor R is not provided, the difference in the detected combined resistance value when the number of cut portions S in the cut state is different tends to be small. If the difference in the detected combined resistance value when the number of cut portions S in the cut state is different is small, there is a possibility that the cut number index value will be erroneously determined. In contrast, in this embodiment, in which the resistor R is provided, the cut number index value can be accurately determined based on the combined resistance value.

[0080] As described above in detail, the building damage detection system 200 according to the embodiment includes a detection unit 220 and an information acquisition device 90. The detection unit 220 has a communication unit A21 and a detection circuit B20. The communication unit A21 is also capable of passing a current through the detection circuit B20. Furthermore, when the section to be cut S is in a conductive state where it is not cut, the communication unit A21 communicates with the information acquisition device 90 in a different manner than when the section to be cut S is in a cut state where it is cut. This achieves a building damage detection system 200 that can accurately detect damage to the building 1.

[0081] The above-described embodiments are merely examples and do not limit the present disclosure in any way. Therefore, the present disclosure can be naturally improved and modified in various ways without departing from the spirit and scope of the present disclosure.

[0082] In the above embodiment, a configuration in which a detection unit is provided on a specific brace attached to a building frame has been described. However, the detection unit may be provided on a follower member whose length changes in response to deformation of the frame when the building sways. The cut-off portion may be provided by being fixed to one end and the other end of the follower member in the longitudinal direction. This is because damage to the building can be detected when the cut-off portion is cut by the expansion and contraction of the follower member. Note that braces are components that can reduce damage to the frame and undergo relatively large changes in length due to frame deformation. For this reason, braces are suitable locations for installing a detection unit. Furthermore, for example, the brace on which the detection unit is provided does not necessarily have to be configured with a seismic damper. For example, the detection unit may be provided on a brace that uses wire instead of a seismic damper.

[0083] Furthermore, it is preferable to install the detection unit in a building in a location that is evaluated as having a high degree of damage based on a simulation of the building shaking in advance. That is, it is preferable to install the detection unit in a high-damage area that is evaluated as having a high degree of damage compared to a low-damage area, rather than in a location that is evaluated as a low-damage area in the simulation of the building shaking. This is because installing the detection unit in a location of the building that is relatively damaged allows for more accurate detection of damage to the building.

[0084] For example, in the above embodiment, an example was described in which the number of sections to be cut is three. However, the number of sections to be cut can be changed as appropriate depending on the classification of the degree of damage to the building. For example, in the above embodiment, an example was described in which RFID was used for communication between the information reading device and the detection unit. However, communication between the information reading device and the detection unit can also be performed using a device other than RFID. For example, communication between the information reading device and the detection unit can be performed using short-range wireless communication other than RFID. Communication between the information reading device and the detection unit can be performed in a disconnected state except during inspection, and during inspection, using a wired connection that connects via a connector for communication. It is preferable that the detection unit be able to communicate with the information reading device using low power via short-range wireless communication or a wired connection. This is because, even in the event of a power outage caused by an earthquake, communication can be initiated from the information reading device, allowing for an appropriate response.

[0085] The above-mentioned disclosed technology also includes the following means 1 to 11. [Means 1] A building damage detection system for detecting damage to a building having a frame made up of a plurality of frame members arranged to intersect with other frame members, a detection unit that is provided on a follower member whose length changes in response to deformation of the frame when shaking occurs in the building and that is capable of detecting the degree of damage to the building; an information acquisition device capable of acquiring information indicating the degree of damage to the building based on a communication result with the detection unit, The detection unit a detection circuit having a cut-off portion that is cut when the length of the follow-up member changes beyond a predetermined allowable change length; A building damage detection system having a communication unit that is capable of passing current through the detection circuit and that communicates with the information acquisition device in a different manner when the portion to be cut is in an uncut, conductive state than when the portion to be cut is in a cut, disconnected state.

[0086] [Means 2] The building damage detection system according to Means 1, the detection unit has a plurality of the portions to be cut, each having a different allowable change length; A building damage detection system in which the information acquisition device communicates with the communication unit to acquire different information depending on the number of the multiple sections to be cut that are in the conductive state.

[0087] [Means 3] The building damage detection system according to means 2, the detection unit includes a plurality of the communication units provided for each of the plurality of portions to be cut, The information acquisition device is a building damage detection system capable of acquiring information indicating the extent of damage to a building by communicating with a plurality of the communication units.

[0088] [Means 4] The building damage detection system according to means 3, a confirmation unit provided on the same follower member as the detection unit; the communication unit and the confirmation unit each have an antenna capable of communicating with the information acquisition device by electromagnetic waves, A building damage detection system in which the antenna of the confirmation unit is located in close proximity to at least one of the antennas of the multiple communication units.

[0089] [Means 5] The building damage detection system according to means 2, the detection circuit is configured by connecting a plurality of the portions to be cut in parallel with each other, The detection unit a cut number index value acquisition unit that is capable of causing a current to flow through the detection circuit and that is capable of acquiring a cut number index value that indicates the number of the plurality of cut-off portions that are in the cut state based on a combined resistance index value that indicates a combined resistance value of the detection circuit; A building damage detection system having a power supply unit capable of supplying power to the detection circuit and the cut number index value acquisition unit.

[0090] [Means 6] The building damage detection system according to means 5, the communication unit has a storage unit capable of storing the disconnection count index value, A building damage detection system in which the disconnection number index value acquisition unit acquires the disconnection number index value using power supplied from the power supply unit in response to a predetermined acquisition condition being met, and stores the acquired disconnection number index value in the memory unit.

[0091] [Means 7] The building damage detection system according to means 5 or 6, A building damage detection system in which the detection circuit has a resistor connected in series with each of the multiple sections to be cut.

[0092] [Means 8] A building damage detection system according to any one of means 1 to means 7, A building damage detection system in which the detection unit is provided in the tracking member installed in a high-damage area of ​​the building that is evaluated to have a higher level of damage than a predetermined low-damage area through a simulation of when shaking occurs in the building.

[0093] [Means 9] A building damage detection system according to any one of means 1 to means 7, A building damage detection system in which the compliant member is a brace attached to the building frame and whose length changes in response to deformation of the frame.

[0094] [Means 10] The building damage detection system according to Means 9, The building damage detection system is configured such that the brace includes a seismic damper.

[0095] [Means 11] The building damage detection system according to Means 9, A building damage detection system, wherein the brace is configured to include a wire member. [Explanation of symbols]

[0096] 1: Building 10: Frame 11, 12, 13, 14: Frame material 20: Brace 90: Information acquisition device 100, 200: Building damage detection system 120, 220: Detector 131, 231: Communication control unit 132, 142, 232: Memory 133, 143, 233: Antenna 141: Verification control section 240: Cutoff number index value acquisition unit 250: Power supply section A, A21: Communication Department B, B20: Detection circuit R:Resistor S: Section to be cut X: Confirmation section

Claims

1. A building damage detection system for detecting damage to a building having a frame made up of a plurality of frame members arranged to intersect with other frame members, a detection unit that is provided on a follower member whose length changes in response to deformation of the frame when shaking occurs in the building and that is capable of detecting the degree of damage to the building; an information acquisition device capable of acquiring information indicating the degree of damage to the building based on a communication result with the detection unit, The detection unit a detection circuit having a cut-off portion that is cut when the length of the follow-up member changes beyond a predetermined allowable change length; A building damage detection system having a communication unit that is capable of passing current through the detection circuit and that communicates with the information acquisition device in a different manner when the portion to be cut is in an uncut, conductive state than when the portion to be cut is in a cut, disconnected state.

2. The building damage detection system according to claim 1, the detection unit has a plurality of the portions to be cut, each having a different allowable change length; A building damage detection system in which the information acquisition device communicates with the communication unit to acquire different information depending on the number of the multiple sections to be cut that are in the conductive state.

3. 3. The building damage detection system according to claim 2, the detection unit includes a plurality of the communication units provided for each of the plurality of portions to be cut, The information acquisition device is a building damage detection system capable of acquiring information indicating the extent of damage to a building by communicating with a plurality of the communication units.

4. 4. The building damage detection system according to claim 3, a confirmation unit provided on the same follower member as the detection unit; the communication unit and the confirmation unit each have an antenna capable of communicating with the information acquisition device by electromagnetic waves, A building damage detection system in which the antenna of the confirmation unit is located in close proximity to at least one of the antennas of the multiple communication units.

5. 3. The building damage detection system according to claim 2, the detection circuit is configured by connecting a plurality of the portions to be cut in parallel with each other, The detection unit a cut number index value acquisition unit that is capable of causing a current to flow through the detection circuit and that is capable of acquiring a cut number index value that indicates the number of the plurality of cut-off portions that are in the cut state based on a combined resistance index value that indicates a combined resistance value of the detection circuit; A building damage detection system having a power supply unit capable of supplying power to the detection circuit and the cut number index value acquisition unit.

6. 6. The building damage detection system according to claim 5, the communication unit has a storage unit capable of storing the disconnection count index value, A building damage detection system in which the disconnection number index value acquisition unit acquires the disconnection number index value using power supplied from the power supply unit in response to a predetermined acquisition condition being met, and stores the acquired disconnection number index value in the memory unit.

7. 6. The building damage detection system according to claim 5, A building damage detection system in which the detection circuit has a resistor connected in series with each of the multiple sections to be cut.

8. A building damage detection system according to any one of claims 1 to 7, A building damage detection system in which the detection unit is provided in the tracking member installed in a high-damage area of ​​the building that is evaluated to have a higher level of damage than a predetermined low-damage area through a simulation of when shaking occurs in the building.

9. A building damage detection system according to any one of claims 1 to 7, A building damage detection system in which the compliant member is a brace attached to the building frame and whose length changes in response to deformation of the frame.

10. 10. The building damage detection system according to claim 9, The building damage detection system is configured such that the brace includes a seismic damper.

11. 10. The building damage detection system according to claim 9, A building damage detection system, wherein the brace is configured to include a wire member.

Images