Relative displacement information acquisition system

Abstract

To enhance the degree of freedom in the installation of constituent devices in a relative displacement information acquisition system.SOLUTION: The apparatus includes an indicator member (21) provided on a structure (110), a plurality of interval detection sensors (22A to 22C) provided on a ground-side base (210) and configured to acquire detection information corresponding to a horizontal interval between the indicator member (21) and each of the interval detection sensors (22A to 22C), and a main controller (41) configured to acquire an indicator position datum indicating a position of the indicator member (21) based on an installation coordinate datum indicating an installation position of each of the interval detection sensors (22A to 22C) and an interval datum corresponding to each of the interval detection sensors (LA to LA).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a relative displacement information acquisition system. [Background technology]

[0002] A seismic isolation structure is known that includes a structure and a seismic isolation device that supports the structure. The seismic isolation device is installed between the structure and the ground foundation and suppresses horizontal movement of the structure in the event of an earthquake, thereby reducing the external force that the structure receives. In seismically isolated structures, for example, the relative displacement between the structure and the ground that occurs when an earthquake occurs is acquired in order to understand the external forces that the structure receives when an earthquake occurs and to understand the performance of the seismic isolation device.

[0003] For example, marking devices (earthquake track recorders) are widely used to obtain relative displacement. Marking devices have a marking needle attached to the structure and a marking plate attached to the ground, and the change in relative displacement (track) when an earthquake occurs is recorded on the surface of the marking plate by the marking needle. With the marking device, it was necessary to enter the seismic isolation layer where the seismic isolation device was installed in order to check the records. Therefore, in situations where there was a high possibility of aftershocks, it was difficult to enter the seismic isolation layer, which could result in delays in checking the records. Furthermore, with marking devices, it is necessary to replace the marking plates after recording has been completed, and if multiple earthquakes of high magnitude occur before the marking plates are replaced, the records of each earthquake will overlap, making it difficult to track changes over time. For this reason, devices for acquiring relative displacement are being developed.

[0004] For example, the device described in Patent Document 1 uses three non-contact sensors to measure the three-dimensional displacement of a rectangular parallelepiped block that protrudes downward from the bottom surface of a structure's foundation. The non-contact sensors used are a laser displacement sensor and an ultrasonic displacement sensor. Furthermore, in the device described in Patent Document 2, a string-like member is attached with a predetermined tension between the upper and lower plates of the seismic isolation device. The string-like member is stretched by the relative movement of the upper and lower plates when an earthquake occurs, and remains stretched even after the earthquake subsides. Therefore, with the device described in Patent Document 2, the maximum relative displacement between the structure and the ground foundation can be obtained based on the length of the stretched string-like member.

[0005] The device described in Patent Document 1 measures the displacement of a rectangular parallelepiped block using a laser displacement sensor and an ultrasonic displacement sensor, which limits the installation location of each displacement sensor. In addition, the laser displacement sensor is susceptible to dust floating in the installation space, and the ultrasonic displacement sensor is susceptible to temperature and humidity changes in the installation space. Furthermore, the device described in Patent Document 2 also has the problem that the installation position of the string-like member is limited because the string-like member is attached to the seismic isolation device. Furthermore, although the device described in Patent Document 2 can obtain the maximum relative displacement between the structure and the ground-side foundation, it also has the problem that it is difficult to grasp the relative displacement over time. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 2639254 [Patent Document 2] Patent No. 6157272 Summary of the Invention [Problem to be solved by the invention]

[0007] As described above, conventional devices have had the problem of limitations on where they can be installed. The present invention has been made in view of the above circumstances, and its main object is to increase the degree of freedom in the installation of the device. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a relative displacement information acquisition system that is installed in a structure and a seismic isolation structure equipped with a seismic isolation device and that acquires relative displacement information that indicates the horizontal relative displacement of the structure with respect to a ground-side foundation, and is characterized by comprising: an index member installed on one of the structure and the ground-side foundation; a plurality of detection information acquisition means installed on the other of the structure and the ground-side foundation and that acquires detection information corresponding to the horizontal distance between the index member; a spacing information acquisition means that acquires spacing information that indicates the distance based on the detection information; an index position information acquisition means that acquires index position information that indicates the position of the index member based on a plurality of installation position information that indicates the installation positions of the plurality of detection information acquisition means and a plurality of spacing information that corresponds to the plurality of detection information acquisition means; and a relative displacement information acquisition means that acquires the relative displacement information based on first index position information that indicates the initial position of the index member and second index position information acquired by the index position information acquisition means. [Effects of the Invention]

[0009] According to the relative displacement information acquisition system of the present invention, the degree of freedom in installing the device can be increased. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a cross-sectional view showing the entire seismic isolation structure. [Figure 2] FIG. 2A is a diagram illustrating the configuration of a relative displacement information acquisition system, and FIG. 2B is a diagram illustrating the configuration and initial state of a gap detection unit. [Figure 3] FIG. 1 is a block diagram illustrating a configuration of a relative displacement information acquisition system. [Figure 4] FIG. 1 is a functional block diagram of a relative displacement information acquisition system. [Figure 5]10(a) is a diagram showing a state in which the indicator member has moved to a position P1 at time t1, and FIG. 10(b) is a diagram showing a state in which the indicator member has moved to a position P2 at time t2. [Figure 6] 10A and 10B are diagrams illustrating examples of display on a display unit, in which (a) shows the relative displacement immediately after the start of movement, and (b) shows the relative displacement thereafter. [Figure 7] FIG. 10 is a diagram illustrating an example of a display on the display unit, showing changes in relative displacement and acceleration during the period from the start of an earthquake to its end. [Figure 8] 1A is a block diagram illustrating a data acquisition process, and FIG. 1B is a block diagram illustrating a data transmission process. [Figure 9] 10 is a flowchart illustrating data acquisition and storage processing. [Figure 10] 10A to 10C are diagrams illustrating a process of temporarily storing data in a memory of a measurement control unit. [Figure 11] 10A and 10B are diagrams illustrating a process of copying data to a data storage unit. [Figure 12] 10A and 10B are diagrams illustrating data update processing by the measurement control unit. [Figure 13] 10A and 10B are diagrams illustrating a data update termination process performed by the measurement control unit. [Figure 14] 10A and 10B are diagrams illustrating a process for acquiring history data. [Figure 15] 10 is a flowchart illustrating a process of calculating an index position and a process of outputting a relative displacement. [Figure 16] 10A and 10B are diagrams illustrating a modified example of the interval detection unit. [Figure 17] 10A and 10B are diagrams illustrating another modified example of the gap detection unit. [Figure 18] 10(a) to 10(c) are diagrams illustrating modified examples in which the arrangement and number of wire displacement gauges are changed. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following describes an embodiment of the relative displacement information acquisition system 1. However, unless otherwise specified, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and do not intend to limit the scope of the present invention.

[0012] <Seismic isolation structure 100> FIG. 1 is a cross-sectional view showing the entire seismic isolation structure 100, FIG. 2(a) is a diagram explaining the configuration of the relative displacement information acquisition system 1, FIG. 2(b) is a diagram explaining the configuration and initial state of the interval detection unit 2, FIG. 3 is a block diagram explaining the configuration of the relative displacement information acquisition system 1, and FIG. 4 is a functional block diagram of the relative displacement information acquisition system 1. 1 and 2, the X-axis direction and the Y-axis direction indicate the horizontal direction, and the Z-axis direction indicates the height direction.

[0013] 1 and 2, the relative displacement information acquisition system 1 is installed in a seismic isolation structure 100 that includes a structure 110 and a seismic isolation device 120. The structure 110 is, for example, a reinforced concrete building, but is not limited to this. For example, the relative displacement information acquisition system 1 can also be applied to relatively small structures (such as an ordinary house, a seismic isolation device for industrial equipment, or a test object installed on a vibration exciter). The illustrated structure 110 is supported on a ground-side foundation 210 via a seismic isolation device 120 provided between the structure foundation 111 and the ground-side foundation 210 . In this embodiment, the ground-side foundation 210 is, for example, a reinforced concrete foundation that covers a pit 220 formed in the ground 200, but is not limited to this as long as it is a foundation structure provided on the ground 200. The seismic isolation device 120 is a device that allows relative horizontal movement between the structure 110 and the ground-side foundation 210, and suppresses horizontal movement of the structure 110 when an earthquake occurs, thereby reducing the external force that the structure 110 receives. The seismic isolation device 120 may be, for example, a seismic isolation rubber (laminated rubber) type seismic isolation device or a seismic isolation device equipped with a sliding bearing, but may be another type of seismic isolation device.

[0014] A gap detection unit 2 is provided in the space within the pit 220 between the structure foundation 111 and the ground side foundation 210, and a data logger 3, a main control unit 4, and a power supply unit 5 are arranged inside the structure 110. The interval detection unit 2, data logger 3, main control device 4, and power supply device 5 will be described below.

[0015] <Gap detection unit 2> 1 and 2 includes an index member 21 provided on a structure 110 (for example, a structure foundation 111) and a plurality of gap detection sensors 22 provided on a ground-side foundation 210. The illustrated gap detection unit 2 includes three gap detection sensors 22. The installation location of the indicator member 21 is not limited to the structure foundation 111, as long as it is provided on the structure 110. Similarly, the installation location of the gap detection sensor 22 is also not limited to the ground-side foundation 210, as long as it is a member (ground-side member) that moves together with the ground 200.

[0016] The indicator member 21 is a rod-shaped member protruding downward from the bottom surface of the structure foundation 111, and is made of, for example, a metal pipe of a predetermined diameter. The indicator member 21 is installed at a position (observation point) suitable for observing the horizontal movement of the structure 110. When an earthquake occurs, the indicator member 21 moves horizontally together with the structure 110.

[0017] The gap detection sensor 22 corresponds to the detection information acquiring means 2A (see FIG. 4), and acquires detection information according to the horizontal gap between the index member 21. The detection information is a physical quantity whose magnitude changes according to the gap between the index member 21, and is, for example, a strain value in a gap detection sensor equipped with a strain gauge, or a resistance value in a gap detection sensor equipped with a variable resistor. The detection information is not limited to the strain value or the resistance value, as long as it is a physical quantity that changes depending on the distance from the index member 21. For example, the detection information may be a voltage value or a current value that changes depending on the strain value or the resistance value.

[0018] The gap detection sensor 22 in this embodiment is composed of three wire displacement meters. Therefore, the gap detection sensor 22 (22A, 22B, 22C) is provided with a detection unit main body 23 (23A, 23B, 23C) that is installed on the ground side foundation 210 and moves horizontally together with the ground side foundation 210, and wire members 24 (24A, 24B, 24C) that are provided so as to be able to be freely reeled out and retracted relative to the detection unit main body 23. Inside the detection unit main body 23, there are provided strain gauges 25 (25A, 25B, 25C) whose strain value changes depending on the amount of payout of the wire member 24. For convenience, in the following description, the strain value will also be referred to as the output of the strain gauge 25.

[0019] The detection unit bodies 23A to 23C are provided at 120° intervals in the circumferential direction around the index member 21. The tip of each of the wire members 24A to 24C is fixed to the outer peripheral surface of the index member 21, and each of the wire members 24A to 24C is installed horizontally with a predetermined tension. The strain of the strain gauges 25A to 25C provided in each of the detection unit bodies 23A to 23C changes depending on the horizontal distance between them and the index member 21.

[0020] In the above example, the gap detection sensor 22 is configured as a wire displacement meter, but the gap detection sensor 22 may be a sensor of another type as long as it can generate detection information corresponding to the horizontal gap between the index member 21. For example, instead of the wire member 24, a magnetostrictive linear sensor configured to move a rod back and forth may be used as the gap detection sensor 22. Furthermore, when the gap detection sensor 22 is configured using a wire-type displacement meter as in this embodiment, there is an advantage that the gap with the indicator member 21 can be detected with high accuracy even in an environment with a lot of dust, or in an environment with air flow or where condensation is likely to occur.

[0021] The structure 110 is provided with an acceleration sensor 6. The acceleration sensor 6 corresponds to the acceleration detection means shown in Fig. 4, and detects horizontal acceleration applied to the structure 110 when an earthquake occurs or the like, and outputs the detection result. The acceleration sensor 6 in this embodiment is, for example, a two-axis acceleration sensor, with each axis facing horizontally, for example, in the X-axis direction and the Y-axis direction. Note that a three-axis acceleration sensor may also be used as the acceleration sensor 6. When a three-axis acceleration sensor is used, the axes may be positioned, for example, in the X-axis direction, the Y-axis direction, and the Z-axis direction.

[0022] <Data Logger 3> The data logger 3 is a device that measures physical quantities and records the data. In this embodiment, the data logger 3 acquires the horizontal distance between the index members 21 detected by each distance detection sensor 22 and the acceleration detected by the acceleration sensor 6, and records the data.

[0023] As illustrated in Figure 3, the data logger 3 includes a measurement control unit 31 including a CPU 31a and a memory 31b, a data storage unit 32 capable of storing various types of data, an A / D converter 33 that digitally converts electrical signals acquired from the detection unit (each of the interval detection sensors 22A to 22C, the acceleration sensor 6), a clock IC (real-time clock) 34 for acquiring the time of data acquisition, and a communication interface (I / F) 35 for communicating with external devices.

[0024] The CPU 31a is a calculation means and controls the overall operation of the data logger 3. The memory 31b is a storage medium for storing information, and is used as a work area when the CPU 31a processes information, and stores a computer program (hereinafter referred to as a program) for operating the CPU 31a. The CPU 31a executes the programs stored in the memory 31b, causing the measurement control unit 31 to perform various operations.

[0025] For example, the measurement control unit 31 periodically samples the output (strain value) of the strain gauge 25 provided in the detection unit main body 23. In other words, the measurement control unit 31 acquires the detection information acquired by the detection information acquisition means in time series. In this embodiment, the output of the strain gauge 25 is sampled over a specified time period before and after the occurrence of an earthquake. For example, the measurement control unit 31 samples the strain value over a period from 30 seconds before to 5 minutes after the occurrence of an earthquake, but the specified time period is not limited to this example. In this embodiment, the sampling frequency is, for example, 100 Hz to 200 Hz, but is not limited to this range.

[0026] The measurement control unit 31 is electrically connected to the strain gauge 25 via a communication interface 35, and periodically acquires, for example, a voltage value that changes according to the strain value. At this time, the A / D converter 33 converts the voltage value into a digital value. The measurement control unit 31 functions as interval information acquisition means 3A (see FIG. 4). For example, the measurement control unit 31 acquires the amount of payout of the wire member 24 from the strain value, in other words, the interval with the index member 21, and pairs the acquired interval with the time acquired from the clock IC 34 (for example, data indicating the year, month, day, hour, minute, and second) to obtain interval data (interval information). Then, the measurement control unit 31 stores the acquired interval data in chronological order in the data storage unit 32 (interval information storage means 3B).

[0027] Similarly, the measurement control unit 31 is electrically connected to the acceleration sensor 6 through the communication interface 35, and periodically acquires an output (e.g., a voltage value) that changes depending on the magnitude of the acceleration. At this time, the A / D converter 33 also converts the voltage value into a digital value. The measurement control unit 31 functions as an acceleration information acquisition means 3C (see FIG. 4). For example, the measurement control unit 31 converts the voltage value acquired for each axis into acceleration, and pairs the acceleration obtained by the conversion with the time acquired from the clock IC 34 (for example, data indicating the year, month, day, hour, minute, and second) to generate acceleration data (acceleration information). Then, the measurement control unit 31 stores the acquired acceleration data in chronological order in the data storage unit 32 (acceleration information storage means 3D).

[0028] The communication interface 35 uses an interface conforming to various standards required for communication with other devices. The communication interface 35 may be wired or wireless. The main control device 4, data server 7, and terminal device 8, which will be described later, also have communication interfaces 44, 73, and 84, but as with the communication interface 35 provided in the data logger 3, various standard interfaces required for communication with other devices are used, so their explanation will be omitted.

[0029] In this embodiment, data is recorded by the data logger 3, but this is not limiting. Data may be recorded by another device. For example, as will be explained in a modified example below, the function of the data logger 3 may be performed by the main control device 4.

[0030] <Main Control Unit 4> As shown in FIG. 3, the main control device 4 includes a main control unit 41 including a CPU 41a and a memory 41b, an input unit 42 such as a mouse or keyboard for inputting various information, a display unit 43 such as a display for displaying various information, and a communication interface 44 for communicating with other devices. The CPU 41a is a calculation means and controls the overall operation of the main control device 4. The memory 41b is a storage medium for storing information, and is used as a work area when the CPU 41a processes information, and stores programs for operating the CPU 41a. The CPU 41a executes the programs stored in the memory 41b, causing the main control unit 41 to perform various operations. For example, the main control unit 41 can control the operation of the data logger 3 via the measurement control unit 31 and access the data storage unit 32 provided in the data logger 3.

[0031] <Acquisition of index position data> The main control unit 41 functions as an index position information acquiring means 4A (see FIG. 4). For example, the main control unit 41 acquires index position data (index position information) indicating the position of the index member 21 based on a plurality of pieces of installation coordinate data (installation position information) indicating the installation positions of the detection unit main bodies 23A to 23C of the interval detection unit 2 and the interval data described above.

[0032] For example, as shown in Figure 2(b), in the relative displacement information acquisition system 1, an XY coordinate system is set in which the position of the index member 21 in a normal state (initial state) when no earthquake has occurred is set as the origin P0, and the installation positions of each detection unit main body 23A to 23C are set as positions PA, PB, and PC. The XY coordinates (Xa, Ya) of the installation position PA, the XY coordinates (Xb, Yb) of the installation position PB, and the XY coordinates (Xc, Yc) of the installation position PC are determined to satisfy the relationships of the following equations (1) to (3).

[0033] La0=[(Xa-Xp0) 2 +(Ya-Yp0) 2 ] 1 / 2 ···(1) Lb0=[(Xb-Xp0) 2 +(Yb-Yp0) 2 ] 1 / 2 ···(2) Lc0=[(Xc-Xp0) 2 +(Yc-Yp0) 2 ] 1 / 2 ···(3) In equations (1) to (3), La0 indicates the distance to the index member 21 in the normal state detected by the first distance detection sensor 22A, Lb0 indicates the distance to the index member 21 in the normal state detected by the second distance detection sensor 22B, Lc0 indicates the distance to the index member 21 in the normal state detected by the third distance detection sensor 22C, Xp0 is the X coordinate value at the origin P0, and Yp0 is the X coordinate value at the origin P0.

[0034] The memory 41a of the main control unit 41 shown in FIG. 3 stores in advance installation coordinate data (installation position information) indicating the XY coordinates (Xp0, Yp0) of the origin P0, the XY coordinates (Xa, Ya) of the position PA, the XY coordinates (Xb, Yb) of the position PB, and the XY coordinates (Xc, Yc) of the position PC. In this embodiment, Xp0, which is the X coordinate of origin P0, is 0, and Yp0, which is the Y coordinate of origin P0, is 0. Furthermore, the X and Y coordinates (Xa, Ya) of position PA, the X and Y coordinates (Xb, Yb) of position PB, and the X and Y coordinates (Xc, Yc) of position PC are, for example, the X and Y coordinates of the payout positions of wire members 24A to 24C in each of detection unit bodies 23A to 23C. However, these X and Y coordinates are merely examples, and the present invention is not limited to these X and Y coordinates. The main control unit 41 acquires index position data indicating the position of the index member 21 based on the installation coordinate data of each of the gap detection sensors 22A to 22C and each gap data based on the detection results of each of the gap detection sensors 22A to 22C.

[0035] FIG. 5(a) is a diagram showing a state in which the indicator member 21 has moved to a position P1 at time t1, and FIG. 5(b) is a diagram showing a state in which the indicator member 21 has moved to a position P2 at time t2. 5(a), it is assumed that the center of the indicator member 21 is located at position P1 (Xp1, Yp1) at time t1. In this case, the distances La1, Lb1, and Lc1 between the distance detection sensors 22A to 22C and the indicator member 21 can be expressed by the following equations (4) to (6). La1 = [(Xa-Xp1) 2 +(Ya-Yp1) 2 ] 1 / 2 ···(4) Lb1=[(Xb-Xp1) 2 +(Yb-Yp1) 2 ] 1 / 2 ···(5) Lc1=[(Xc-Xp1) 2 +(Yc-Yp1) 2 ] 1 / 2 ···(6)

[0036] As described above, the intervals La1, Lb1, and Lc1 are stored as interval data in the data storage unit 32 included in the data logger 3. The main control unit 41 uses the installation coordinate data stored in the memory and the interval data acquired from the data storage unit 32 to solve the simultaneous equations based on equations (4) to (6), thereby obtaining the index position data indicating the position P1 of the index member 21, i.e., the X coordinate (Xp1) and the Y coordinate (Yp1).

[0037] Next, with reference to FIG. 5(b), it is assumed that the center of the indicator member 21 is located at position P2 (Xp2, Yp2) at time t2. The main control unit 41 can similarly acquire the XY coordinates (Xp2, Yp2) for the position P2 of the index member 21 at time t2. For example, the main control unit 41 can acquire the index position data indicating the position P2 of the index member 21, i.e., the X coordinate (Xp2) and the Y coordinate (Yp2), by using the installation coordinate data and the interval data and solving the simultaneous equations based on equations (7) to (9). La2=[(Xa-Xp2) 2 +(Ya-Yp2) 2 ] 1 / 2 ···(7) Lb2=[(Xb-Xp2) 2 +(Yb-Yp2) 2 ] 1 / 2 ···(8) Lc2=[(Xc-Xp1) 2 +(Yc-Yp2) 2 ] 1 / 2 ···(9)

[0038] Similarly, the main control unit 41 can obtain the position Pn(Xpn, Ypn) of the index member 21 at other times by solving the simultaneous equations based on the equations (10) to (12). Lan=[(Xa-Xpn) 2 +(Ya-Ypn) 2 ] 1 / 2 ···(10) Lbn=[(Xb-Xpn) 2 +(Yb-Ypn) 2 ] 1 / 2···(11) Lcn=[(Xc-Xpn) 2 +(Yc-Ypn) 2 ] 1 / 2 ···(12) In the above formulas (10) to (12), "n" is an arbitrary natural number.

[0039] <Acquisition and display of relative displacement data> The main control unit 41 functions as a relative displacement information acquisition means 4B (see FIG. 4). For example, the main control unit 41 acquires relative displacement data (relative displacement information) indicating the horizontal relative displacement of the structure 110 with respect to the ground-side foundation 210, based on the XY coordinates (first index position information) of the origin P0 indicating the initial state and the XY coordinates (second index position information) of the index member 21 acquired by solving the simultaneous equations described above.

[0040] In the example shown in FIG. 5(a), the main control unit 41 acquires data indicating the displacement between the XY coordinates (Xp0, Yp0) of the origin P0 and the XY coordinates (Xp1, Yp1) of the position P1 as relative displacement data (relative displacement information). Similarly, in the example shown in Figure 5(b), the main control unit 41 acquires data indicating the displacement between the XY coordinates (Xp0, Yp0) of the origin P0 and the XY coordinates (Xp2, Yp2) of the position P2 as relative displacement data (relative displacement information).

[0041] The main control unit 41 acquires relative displacement data in time series based on the time series interval data, and causes the acquired relative displacement data to be visually displayed on the display unit 43. Figure 6(a) is a diagram illustrating an example of the display of relative displacement immediately after the start of movement, Figure 6(b) is a diagram showing the relative displacement thereafter, and Figure 7 is a diagram illustrating an example of the display of changes in relative displacement and acceleration from the start to the end of the earthquake.

[0042] For example, in the display example shown in Figure 6(a), the main control unit 41 causes the display unit to display the position P11, which was acquired first in the time series, and also causes the display unit to display a straight line connecting the origin P0 and the position P11. Similarly, in the display example shown in Figure 6(b), the main control unit 41 causes the display unit to display the position P12, which was acquired second in time series, and also causes the display unit to display a straight line connecting the positions P11 and P12. As shown in FIG. 7, the main control unit 41 causes the display unit 43 to display all of the relative displacement data acquired in time series over a predetermined period of time, which will be described later, and also causes the display unit 43 to display all of the acceleration data acquired in time series over the predetermined period of time. 7 shows an example of display using orbits, but the display of the relative displacement data and acceleration data is not limited to orbits. For example, the relative displacement data and acceleration data may be displayed as time history waveforms.

[0043] In this way, the main control unit 41 displays the relative displacement data in chronological order on the display unit 43, making it easy to recognize the change over time in the relative displacement between the structure 110 and the ground-side foundation 210 (ground 200) when an earthquake occurs. Furthermore, since the acceleration data is displayed on the display unit 43 together with the relative displacement data, the change in the external force applied to the structure 110 can be easily recognized.

[0044] <Power supply device 5> The power supply device 5 shown in Figures 1 and 2(a) is an uninterruptible power supply. This power supply device 5 is equipped with a storage battery that is charged by a commercial AC power source, and supplies power to the data logger 3, main control device 4, etc. Under normal circumstances, the power supply device 5 charges the storage battery with commercial AC power while supplying commercial AC power to the data logger 3 and main control device 4. During a power outage, the power supply device 5 continues to supply the power stored in the storage battery to the data logger 3 and main control device 4. Therefore, even if a power outage occurs, the data logger 3 and the main control device 4 can continue to operate for a certain period of time after the power outage.

[0045] <Data Server 7> As shown in FIG. 3, the relative displacement information acquisition system 1 includes a data server 7 that can communicate with the main control device 4 via a network NW. The network NW may be a wired network or a wireless network as long as it allows commands and various data to be sent and received between the main control device 4 and the data server 7.

[0046] The data server 7 illustrated in FIG. 3 corresponds to an external device and is equipped with a server control unit 71 including a CPU 71a and a memory 71b, a server-side data storage unit 72 capable of storing various data, and a communication interface 73 for communicating with other devices. The CPU 71a is a computing means and controls the overall operation of the data server 7. The memory 71b is a storage medium for storing information, and is used as a work area when the CPU 71a processes information, and stores programs for operating the CPU 71a. The server-side data storage unit 72 (distance information storage means 7A, acceleration information storage means 7B, see Figure 4) stores the distance data, acceleration data, installation coordinate data, etc. transmitted from the main control unit 4 (information transmission means 4C, see Figure 4) as history data, and stores it in a readable state.

[0047] <Terminal Device 8> As shown in FIG. 3, the relative displacement information acquisition system 1 includes a terminal device 8 that can communicate with a data server 7 through a network NW. The terminal device 8 can read out the history data stored in the server-side data storage unit 72 of the data server 7 via the network NW.

[0048] The terminal device 8 illustrated in FIG. 3 includes a terminal control unit 81 including a CPU 81a and a memory 81b, an input unit 82 such as a mouse or keyboard for inputting various information, a display unit 83 such as a display for displaying various information, and a communication interface 84 for communicating with other devices. The CPU 81a is a calculation means and controls the overall operation of the terminal device 8. The memory 81b is a storage medium for storing information, and is used as a work area when the CPU 81a processes information, and stores programs for operating the CPU 81a.

[0049] The CPU 81a executes the programs stored in the memory 81b, causing the terminal control unit 81 to perform various operations. For example, the terminal control unit 81 functions as index position information acquisition means 8A (see FIG. 4), and acquires index position data based on the installation coordinate data and interval data acquired from the data server 7. The terminal control unit 81 also functions as a relative displacement information acquisition means 8B (see Figure 4), and acquires relative displacement data indicating the horizontal relative displacement of the structure 110 with respect to the ground-side foundation 210 based on the XY coordinates of the origin P0 indicating the initial state and the XY coordinates of the time-series index member 21. The process of acquiring index position data and the process of acquiring relative displacement data by the terminal control unit 81 are the same as the processes explained in the main control unit 41, and therefore will not be explained further.

[0050] In this manner, in this embodiment, the installation coordinate data, acceleration data, and interval data are stored in the data server 7, and the terminal device 8 is configured to be able to acquire the index position data and relative displacement data stored in the data server 7. Therefore, in this embodiment, index position data and relative displacement data can be obtained by a terminal device 8 located in a different area away from the area where the structure 110 is built, so even if a large earthquake causes damage to the area where the structure 110 is installed, the index position data and relative displacement data can be obtained from a remote location without having to go to the area.

[0051] <Processing flow in relative displacement information acquisition system 1> Next, the flow of processing in the relative displacement information acquisition system 1 will be described. FIG. 8(a) is a block diagram for explaining the data acquisition process, FIG. 8(b) is a block diagram for explaining the data transmission process, and FIG. 9 is a flowchart for explaining the data acquisition and storage process.

[0052] As shown in Figure 8(a), in the relative displacement information acquisition system 1, a main control device 4, a data logger 3, an interval detection unit 2, and an acceleration sensor 6 are used to acquire sets of interval data and acceleration data over a specified period of time, and the sets are stored in the data storage unit 32 of the data logger 3. Thereafter, as shown in FIG. 8(b), the main control device 4 stores the data set stored in the data storage unit 32 and the installation coordinate data in the server-side data storage unit 72 of the data server 7.

[0053] The process of storing the interval data and the like in the data storage unit 32 and the process of storing the interval data and the like in the server-side data storage unit 72 are mainly controlled by the main control unit 41 provided in the main control device 4, for example. Hereinafter, the process of storing interval data in the data storage unit 32 and the process of storing interval data and the like in the server-side data storage unit 72 will be described with reference to the flowchart of FIG.

[0054] The main control unit 41 operates the measurement control unit 31 of the data logger 3 in standby mode (S1). The standby mode is an operating mode in a normal state when no earthquake has occurred. In the standby mode, the main control unit 41 causes the measurement control unit 31 to sample the strain values ​​of the strain gauges 25 and the output of the acceleration sensor 6 (S2).

[0055] Next, the main control unit 41 determines whether the currently set operation mode is the recording mode (S3). The recording mode is the operation mode when an earthquake occurs. Therefore, the operation mode is selected from either the standby mode in the normal state or the recording mode when an earthquake occurs. If the operating mode being set is the standby mode (S3, No), the main control unit 41 temporarily stores the interval data based on the strain values ​​acquired by the measurement control unit 31 in step S2, and the acceleration data based on the output of the acceleration sensor 6, in the memory 31b of the measurement control unit 31 (S4).

[0056] Next, the main control unit 41 causes the measurement control unit 31 to determine whether the index member 21 has moved from its initial position by a reference amount or more (S5). The reference amount is a value for determining whether an earthquake has occurred and is set to an appropriate value. If the index member 21 has moved from its initial position by the reference amount or more, the measurement control unit 31 determines that an earthquake may have occurred. If the index member 21 has not moved from the initial position by more than the judgment reference amount, in other words, if the measurement control unit 31 determines that an earthquake has not occurred (S5, No), the main control unit 41 proceeds to the processing of step S2 described above and causes the measurement control unit 31 to sample each strain value and the output of the acceleration sensor 6.

[0057] In this embodiment, whether or not an earthquake has occurred is determined based on the amount of movement of the index member 21, but the present invention is not limited to this configuration. For example, whether or not an earthquake has occurred may be determined based on the detection signal of the acceleration sensor 6 (such as the magnitude of acceleration, the measured seismic intensity, or the SI value).

[0058] In this way, in the standby mode, the interval data and acceleration data are periodically acquired and temporarily stored in the memory 31b of the measurement control unit 31. 10(a) to 10(c) are diagrams illustrating the temporary storage process of data in the memory 31b of the measurement control unit 31. In Fig. 10, symbols Dnnn (D001, D002, . . . ) indicate sets of interval data and acceleration data.

[0059] A part of the memory 31b of the measurement control unit 31 is used as a storage area for temporarily storing pairs of interval data and acceleration data. The pairs of data are stored in this storage area, for example, in a FIFO manner.

[0060] 10(a) and 10(b), data sets are sequentially stored in the storage area until the storage area is filled with data sets. After the storage area is filled with data sets, the oldest data set is deleted from the storage area and the newest data set is stored in the storage area. For example, the data set indicated by the symbol D000 in FIG. 10(b) has been deleted from the storage area in FIG. 10(c), and the data set indicated by the symbol D010 in FIG. 10(c) has been stored in the storage area.

[0061] As a result, the storage area temporarily stores the sets of data acquired from the specified time before. In this embodiment, the storage area temporarily stores the sets of data acquired over a period of 30 seconds.

[0062] Returning to FIG. 9, if it is determined in the processing of step S5 described above that the indicator member 21 has moved from its initial position by more than the reference amount (S5, Yes), in other words, if it is determined that an earthquake has occurred, the main control unit 41 sets the recording mode instead of the standby mode (S6). When the recording mode is set, the main control unit 41 controls the measurement control unit 31 to copy the sets of interval data and acceleration data acquired from a specified time before to the data storage unit 32 (S7).

[0063] 11(a) and (b) are diagrams for explaining the process of copying data to the data storage unit 32 of the data logger 3. FIG. As described above, sets of interval data and acceleration data acquired from a specified time before are stored in the memory 31b of the measurement control unit 31. As shown in Figures 11(a) and 11(b), when it is determined that the index member 21 has moved from the initial position by more than the reference amount, the main control unit 41 causes the measurement control unit 31 to copy the sets of data stored in the memory 31b to the data storage unit 32.

[0064] Returning to FIG. 9, the main control unit 41 copies the data set to the data storage unit 32, and then proceeds to the processing of step S2, where it causes the measurement control unit 31 to sample each strain value and the output of the acceleration sensor 6. If the operating mode being set is the recording mode (S3, Yes), the main control unit 41 controls the measurement control unit 31 to acquire interval data based on the strain values ​​acquired in step S2 and acceleration data based on the output of the acceleration sensor 6, and stores the acquired sets of interval data and acceleration data in the memory 31b of the measurement control unit 31 and the data storage unit 32 (S8). The sampling process in step S2 and the data storage process in step S8 are continued until the specified processing time has elapsed (S9, No). In this embodiment, the specified time is set to 5 minutes in consideration of the duration of the earthquake, but the length of the specified time can be set arbitrarily.

[0065] 12(a) and 12(b) are diagrams for explaining the data update process performed by the measurement control unit 31. FIG. The main control unit 41 controls the measurement control unit 31 to store the sets of interval data and acceleration data in the memory 31b and the data storage unit 32, respectively, for a period until the specified processing time has elapsed. As a result, the memory 31b temporarily stores data sets acquired from the specified time before, and the data storage unit 32 sequentially adds the latest data sets. When the specified processing time has elapsed (S9, Yes), the process of storing the sets of interval data and acceleration data ends.

[0066] 13(a) and 13(b) are diagrams for explaining the data update termination process performed by the measurement control unit 31. FIG. As shown in Figures 13(a) and (b), the main control unit 41 controls the measurement control unit 31 to store the last set of data in the specified processing time (for example, the set of data indicated by symbol D050) in both memory 31b and data storage unit 32, and then stores the next set of data (for example, the set of data indicated by symbol D051) only in memory 31b, but not in data storage unit 32. As a result, the data storage unit 32 stores a set of data spanning the period before and after the occurrence of the earthquake (from 30 seconds before the occurrence to 5 minutes after the occurrence).

[0067] 9, the main control unit 41 proceeds to step S10 as the specified processing time elapses, and transmits the sets of interval data and acceleration data stored in the data storage unit 32, as well as a plurality of installation coordinate data indicating the installation positions of the interval detection sensors 22, to the data server 7. At this time, the main control unit 41 functions as the information transmission means 4C shown in FIG. The data server 7 stores the received sets of interval data and acceleration data, and the plurality of installation coordinate data in the server-side data storage unit 72. The server-side data storage unit 72 stores each piece of data in a readable state as history data. Thereafter, the main control unit 41 returns the operation mode to the standby mode (S11) and repeats the series of processes until the system is shut down (S12).

[0068] As shown in Figure 14(a), the main control device 4 acquires index position data based on the historical data stored in the server-side data storage unit 72 of the data server 7 or the set of interval data and acceleration data stored in the data storage unit 32 of the data logger 3, and acquires relative displacement data based on the index position data. Also, as shown in Figure 14(b), the terminal device 8 acquires history data stored in the server-side data storage unit 72 of the data server 7, acquires index position data based on the history data, and acquires relative displacement data based on the index position data.

[0069] The process of acquiring history data, index position data, and relative displacement data is performed, for example, by the main control unit 41 provided in the main control device 4 and the terminal control unit 81 provided in the terminal device 8 executing programs stored in their respective memories 41b, 81b. The processing by the terminal control unit 81 will be described below with reference to the flowchart in Fig. 15. Note that the main control unit 41 also performs the same processing for acquiring history data, index position data, and relative displacement data as the terminal control unit 81, and therefore a description of the acquisition processing by the main control unit 41 will be omitted.

[0070] The terminal control unit 81 requests the data server 7 to transmit history data (S21). After that, the terminal control unit 81 waits for the history data from the data server 7 until a specified time has elapsed (S23, No) (S22). If the history data is not transmitted from the data server 7 after the specified time has elapsed (S23, Yes), the terminal control unit 81 displays an error message on the display unit (S24) and ends the series of processes.

[0071] When the history data is transmitted from the data server 7, the terminal control unit 81 starts receiving the history data (S22, Yes). The terminal control unit 81 continues receiving the history data (S25, S27) until reception of the history data is completed (S26, No). If the reception of the history data is not completed even after the specified time has elapsed (S27, No), the terminal control unit 81 displays an error message on the display unit (S24) and ends the series of processes.

[0072] When the terminal control unit 81 has completed receiving the history data (S26, Yes), it functions as the index position information acquisition means 8A and acquires index position data indicating the position of the index member 21 based on the interval data included in the history data and the plurality of installation coordinate data (S28). Note that the procedure for acquiring the index position data is as described above, and therefore a description thereof will be omitted.

[0073] After acquiring the index position data, the terminal control unit 81 functions as relative displacement information acquisition means 8B, and acquires relative displacement data indicating the horizontal relative displacement of the structure 110 with respect to the ground-side foundation 210 based on the XY coordinates of the origin P0 indicating the initial state and the XY coordinates of the index member 21 acquired in step S28 (S29). Note that the procedure for acquiring the relative displacement data is as described above, and therefore will not be described here.

[0074] After acquiring the relative displacement data, the terminal control unit 81 causes the display unit to display all of the relative displacement data acquired in time series (S30). At this time, the terminal control unit 81 may cause the display unit to display all of the acceleration data included in the history data. The terminal control unit 81 causes the display unit 83 to display the relative displacement data and acceleration data, and then ends the series of processes.

[0075] <Modification> In the above-described embodiment, the gap detection unit 2 includes an indicator member 21 protruding downward from the bottom surface of the structure foundation 111, and a gap detection sensor 22 in which the detection unit main body 23 is provided on the ground-side foundation 210, but is not limited to this configuration. Fig. 16 is a diagram illustrating a modified example of the gap detection unit 2. The gap detection unit 2 of the modified example shown in Fig. 16 also includes an index member 21 and a gap detection sensor 22 configured with a wire displacement meter, but the target on which the index member 21 and the detection unit main body 23 are provided is different from that in the above-described embodiment. That is, in the gap detection unit 2 of the modified example, the indicator member 21 is provided to protrude upward from the surface of the ground-side foundation 210, and the detection unit main body 23 is provided on the bottom surface of the structure foundation 111. Even with this configuration, the same effects as those of the above-described embodiment can be achieved.

[0076] Figure 17 is a diagram illustrating another modified example of the gap detection unit 2. The gap detection unit 2 of the other modified example shown in Figure 17 is characterized by a configuration in which a marking needle 26 is fixed to the lower end of the indicator member 21, and a marking plate 27 on which marking is performed by the marking needle 26 is provided on the surface of the ground-side foundation 210. According to another modified example of the distance detection unit 2, the marking needle 26 fixed to the indicator member 21 marks the relative displacement between the structure 110 and the ground-side foundation 210 on a marking board 27 provided on the surface of the ground-side foundation 210. Then, by using time-series relative displacement data acquired based on the distance between the indicator member 21 and the wire displacement meter in combination with the trajectory (relative displacement) marked on the marking board 27, it is possible to correct errors in the relative displacement data using the trajectory on the marking board 27, and to recognize the marking time for a certain point on the trajectory based on the relative displacement data. 17 illustrates a configuration in which the marking needle 26 is fixed to the lower end of the indicator member 21 and the marking plate 27 is provided on the surface of the ground-side foundation 210, but the configuration is not limited to this. For example, the marking needle 26 may be fixed to the upper end of the indicator member 21 that protrudes upward from the surface of the ground-side foundation 210, and the marking plate 27 may be provided on the bottom surface of the foundation on the structure 110 side.

[0077] In the above-described embodiment, the detection unit bodies 23A to 23C provided in the three interval detection sensors 22A to 22C were arranged at 120° intervals around the indicator member 21 in the circumferential direction, but this configuration is not limited to this. 18(a) to 18(c) are diagrams illustrating modified examples in which the arrangement and number of wire displacement gauges are changed.

[0078] In the modified example shown in Figure 18(a), the detection unit main body 23A provided in the first gap detection sensor 22A, the detection unit main body 23B provided in the second gap detection sensor 22B, and the detection unit main body 23C provided in the third gap detection sensor 22C are each arranged at 45° intervals around the indicator member 21 in the circumferential direction. In the modified example shown in Figure 18(b), the detection unit main body 23A provided in the first gap detection sensor 22A and the detection unit main body 23B provided in the second gap detection sensor 22B are arranged at an interval of 45° around the circumferential direction of the indicator member 21, and the detection unit main body 23B provided in the second gap detection sensor 22B and the detection unit main body 23C provided in the third gap detection sensor 22C are arranged at an interval of 90° around the circumferential direction of the indicator member 21. In the modified example shown in Figure 18(c), the detection unit main body 23A provided in the first gap detection sensor 22A and the detection unit main body 23B provided in the second gap detection sensor 22B are arranged at an interval of 90° around the indicator member 21 in the circumferential direction.

[0079] 18(a) to 18(c), index position data and relative displacement data can be acquired in the same manner as in the above-described embodiment. Therefore, the relative displacement information acquisition system 1 according to this embodiment can increase the degree of freedom in installing the multiple interval detection sensors 22 (interval information generating means).

[0080] In the above-described embodiment, the acceleration of the structure 110 is detected by the acceleration sensor 6, but this configuration is not limiting. For example, the acceleration of the structure 110 may be acquired based on time-series index position data. In this case, the main control device 4 functions as the acceleration information acquisition means 3C.

[0081] With regard to the data storage unit 32 provided in the data logger 3, at least a part of the area of ​​the data storage unit 32 may be configured as a portable memory that is detachable from the data logger 3. By storing a set of interval data and acceleration data in a portable memory, necessary data can be transferred to the terminal device 8 via the portable memory in a situation where the network NW cannot be used.

[0082] In the above embodiment, the main control device 4 and the data logger 3 are configured separately, but the present invention is not limited to this configuration. For example, an interface board that inputs detection signals from the interval detection sensor 22 and the acceleration sensor 6 may be attached to the main control device 4, and the main control device 4 may take on the functions of the data logger 3. In this configuration, the main control device 4 is provided with the various components that the data logger 3 had (such as the data storage unit 32, clock IC 34, and A / D converter 33).

[0083] Although the indicator member 21 is a rod-shaped member in the above embodiment, it is not limited to this configuration. For example, the indicator member 21 may be configured as an eyebolt to which the wire member 24 can be fixed. In this case, the main control unit 41 can obtain the position Pn(Xpn, Ypn, Zpn) of the index member 21 by solving the simultaneous equations based on equations (13) to (15) that take into account the Z-axis component in the height direction. Lan=[(Xa-Xpn) 2 +(Ya-Ypn) 2 +(Za-Zpn) 2 ] 1 / 2 ···(13) Lbn=[(Xb-Xpn) 2 +(Yb-Ypn) 2 +(Zb-Zpn) 2 ] 1 / 2 ···(14) Lcn=[(Xc-Xpn) 2 +(Yc-Ypn) 2 +(Za-Zpn) 2 ] 1 / 2 ···(15) In the above formulas (13) to (15), "n" is an arbitrary natural number.

[0084] Furthermore, since equations (13) to (15) take into account the Z-axis component in the height direction, the vertical movement (height movement) of the structure 110 can also be recorded by having the main control unit 41 solve the simultaneous equations based on equations (13) to (15).

[0085] [Summary of embodiments, actions, and effects of the present invention] <First embodiment> This aspect is a relative displacement information acquisition system 1 that is provided in a seismic isolation structure 100 that has a structure 110 and a seismic isolation device 120, and that acquires relative displacement data that indicates the horizontal relative displacement of the structure 110 with respect to the ground 200, and is characterized by comprising: an index member 21 provided on one of the structure 110 and the ground-side foundation 210; a plurality of distance detection sensors 22A to 22C provided on the other of the structure 110 and the ground-side foundation 210, and that acquire detection information according to the horizontal distance between the index member 21; a measurement control unit 31 that acquires distance data that indicates the distance based on the detection information; and a main control unit 41 that acquires index position data that indicates the position of the index member 21 based on a plurality of installation coordinate data that respectively indicate the installation positions of the plurality of distance detection sensors 22A to 22C and a plurality of distance data that correspond to the plurality of distance detection sensors 22A to 22C, and that acquires the relative displacement data based on first index position data that indicates the initial position of the index member 21 and the acquired second index position data. According to the relative displacement information acquisition system 1 of this embodiment, the installation positions of the distance detection sensors 22A to 22C can be freely determined, provided that the distances between the index member 21 and the distance detection sensors 22A to 22C can be measured. This increases the degree of freedom in installing the distance detection sensors 22A to 22C.

[0086] <Second embodiment> In the relative displacement information acquisition system 1 of this embodiment, the distance detection sensor 22 comprises a detection unit main body 23 installed on the other side of the structure 110 and the ground-side foundation 210, and a wire member 24 that is freely extendable and retractable relative to the detection unit main body 23 and has its tip fixed to the index member 21, and the detection information is characterized in that it is a physical quantity (strain value, resistance value) whose magnitude corresponds to the amount of extension of the wire member 24. According to the relative displacement information acquisition system 1 of this embodiment, the distance detection sensor 22 comprises a detection unit main body 23 and a wire member 24 that is freely retractable and retractable relative to the detection unit main body 23, and the tip of the wire member 24 is fixed to the index member 21 to detect the distance. Therefore, the distance to the index member 21 can be detected with high accuracy even in an environment with a lot of dust, in a place with air flow, or in an environment where condensation is likely to occur.

[0087] <Third embodiment> The relative displacement information acquisition system 1 according to this embodiment is characterized by including a data storage unit 32 that stores interval data in chronological order in association with the acquisition time of the detection information, and a main control unit 41 that acquires index position data in chronological order based on the interval data, and acquires relative displacement data in chronological order based on the index position data. According to the relative displacement information acquisition system 1 of this embodiment, relative displacement data can be acquired in time series.

[0088] <Fourth embodiment> In the relative displacement information acquisition system 1 according to this embodiment, the main control unit 41 transmits the interval data and the multiple installation coordinate data stored in the data storage unit 32 via the network NW and stores them in the server-side data storage unit 72 of the data server 7 connected to the network NW, and the terminal control unit 81 acquires the index position data based on the interval data and the multiple installation coordinate data received from the server-side data storage unit 72 via the network NW. According to the relative displacement information acquisition system 1 of this embodiment, index position data and relative displacement data can be acquired even from a terminal device 8 located far away from the structure 110.

[0089] <Fifth embodiment> The relative displacement information acquisition system 1 according to this embodiment is characterized by comprising an acceleration sensor 6 for acquiring acceleration data indicating the acceleration of the structure 110, a data storage unit 32 for storing the acceleration data in chronological order in association with the time of acquisition of the acceleration data, and a display unit 43 for visually displaying the relative displacement data and the acceleration data. According to the relative displacement information acquisition system 1 of this embodiment, the display unit 43 displays the relative displacement data and acceleration data in a visually recognizable manner, so that the external force applied to the structure 110 can be examined in detail.

[0090] <Sixth embodiment> The relative displacement information acquisition system 1 of this embodiment is characterized in that a marking needle 26 is fixed to the indicator member 21, and a marking board 27 that is marked by the marking needle 26 is provided on the other side of the structure 110 and the ground-side foundation 210. According to the relative displacement information acquisition system 1 of this embodiment, it is possible to analyze the trajectory marked on the marking board 27 in time series. [Explanation of symbols]

[0091] 1... relative displacement information acquisition system, 2... gap detection unit, 21... index member, 22 (22A, 22B, 22C)... gap detection sensor, 23 (23A, 23B, 23C)... detection unit main body, 24 (24A, 24B, 24C)... wire member, 25 (25A, 25B, 25C)... strain gauge, 26... marking needle, 27... marking board, 3... data logger, 3A... gap information acquisition means, 3B... gap information storage means, 3C... acceleration information acquisition means, 31... measurement control unit, 31a... CPU, 31b... memory, 32... data storage unit, 33... A / D converter, 34... clock IC, 35... communication interface, 4... main control unit, 4A... index position information acquisition means, 4B... relative displacement information acquisition means, 4C... Information transmission means, 41...main control unit, 41a...CPU, 41b...memory, 42...input unit, 43...display unit, 44...communication interface, 5...power supply, 6...acceleration sensor, 7...data server, 7A...interval information storage means, 7B...acceleration information storage means, 71...server control unit, 71a...CPU, 71b...memory, 72...server side data storage unit, 73...communication interface, 8...terminal device, 81...terminal control unit, 81a...CPU, 81b...memory, 82...input unit, 83...display unit, 84...communication interface, 100...seismic isolation structure, 110...structure, 111...structure foundation, 120...seismic isolation device, 200...ground, 210...ground side foundation, 220...pit, NW...network

Claims

1. A relative displacement information acquisition system that is provided in a structure and a seismic isolation structure equipped with a seismic isolation device and acquires relative displacement information that indicates a horizontal relative displacement of the structure with respect to the ground, an indicator member provided on one of the structure and the ground-side member; a plurality of detection information acquisition means provided on the other of the structure and the ground-side member, and configured to acquire detection information corresponding to the horizontal distance between the structure and the indicator member; an interval information acquiring means for acquiring interval information indicating the interval based on the detection information; an index position information acquiring means for acquiring index position information indicating the position of the index member based on a plurality of pieces of installation position information indicating the installation positions of the plurality of detection information acquiring means and a plurality of pieces of interval information corresponding to the plurality of detection information acquiring means; a relative displacement information acquiring means for acquiring the relative displacement information based on first index position information indicating an initial position of the index member and second index position information acquired by the index position information acquiring means; A relative displacement information acquisition system comprising:

2. The detection information acquisition means A detection unit main body installed on the other of the structure and the ground side member; a wire member that is provided so as to be freely extended and retracted relative to the detection unit main body and has a tip portion fixed to the index member, The relative displacement information acquisition system according to claim 1 , wherein the detection information is a physical quantity having a magnitude corresponding to the amount of the wire member being fed out.

3. an interval information storage means for storing the interval information in chronological order in association with the acquisition time of the detection information; the index position information acquisition means acquires the index position information in time series based on the interval information; 2. The relative displacement information acquisition system according to claim 1, wherein the relative displacement information acquisition means acquires the relative displacement information in time series based on the index position information.

4. an information transmitting means for transmitting the interval information stored in the interval information storage means and the plurality of pieces of installation position information via a network and storing them in an interval information accumulation means of an external device connected to the network; 4. The relative displacement information acquisition system according to claim 3, wherein the index position information acquisition means acquires the index position information based on the interval information received from the interval information storage means via a network and a plurality of pieces of installation position information.

5. an acceleration information acquisition means for acquiring acceleration information indicating the acceleration of the structure; an acceleration information storage means for storing the acceleration information in chronological order in association with the time of acquisition of the acceleration information; 4. The relative displacement information acquisition system according to claim 3, further comprising: a display unit for visually displaying the relative displacement information and the acceleration information.

6. A marking needle is fixed to the indicator member, 2. The relative displacement information acquisition system according to claim 1, wherein a marking plate on which marking is performed by the marking needle is provided on the other of the structure and the ground-side member.

Images