JP4039963B2 - Structure external force detection device and structure external force detection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure external force detection device that detects electricity by conducting electricity when an external force of the structure is applied, and a method of detecting the external force of the structure using the device.
[0002]
[Prior art]
Conventionally, there are a destructive test (destructive inspection) and a nondestructive test (nondestructive inspection) as methods for detecting whether or not damage has occurred when an external force is applied to a structure. Destructive testing (destructive inspection) is performed by applying a load to a specimen made of actual material to break it, observing or measuring the location of damage on the specimen and its status, and applying it to an actual structure. It can be said that it is a direct method.
[0003]
On the other hand, non-destructive testing (non-destructive inspection) is a method that tries to estimate the internal state of structures using some physical quantity without destroying structures and specimens. This is an indirect method. Examples of the physical quantity used in the nondestructive test include vibration, ultrasonic wave, radiation, magnetism, and sound generated internally (AE: Acoustic Emission) at the time of material destruction (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-9-105665 (page 6-7, FIG. 1-3)
[0005]
[Problems to be solved by the invention]
However, the conventional methods described above have various problems as described below.
[0006]
In the case of a destructive test (destructive inspection), if a specimen is manufactured and its destructive test is performed for each structure, there is a problem that it takes time, labor and cost for preparing the specimen, and it is not efficient. In addition, destruction is greatly affected by the shape of the produced specimen or its dimensions, and the behavior at the time of destruction varies depending on the shape of the specimen. For this reason, when applying to an actual structure, human judgment and consideration are added to the destructive test result. For this reason, there is a problem that it is difficult to accurately determine the actual state of damage to the structure and that skill is required.
[0007]
In the case of non-destructive testing (non-destructive inspection), it is often possible to detect the fact that some destruction has occurred inside the structure, or the fact that some damage exists inside the structure. There is a problem that it is often difficult to clearly grasp the specific location, the shape and dimensions of the damage.
[0008]
In addition, since underground structures such as cast-in-place concrete piles are built underground, the fact that some damage has occurred or some damage has occurred inside the underground structure due to external forces such as earthquakes is Direct confirmation by is very difficult. For this reason, there existed a problem that the test | inspection of a structure was not easy. There is an example of such an inspection of the underground structure, but in this case, it is necessary to dig up around the underground structure such as cast-in-place concrete piles, and so it costs a lot of money. There was also a problem.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the problem to be solved by the present invention is to detect a structure external force that is easy to implement and can detect a damaged part of the structure. An object of the present invention is to provide an apparatus and a method for detecting an external force of a structure.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, a structure external force detection device according to the present invention is
A first container made of a flexible material and encapsulating the first enclosure, and a second enclosure made of a brittle material and mixed with the first enclosure to produce an electrolyte solution are enclosed in the first container. It has n (n: an integer greater than or equal to 3) external force response members configured in a rod shape with a second container to be accommodated, and one end of each of the external force response members is concentrated and joined. An external force responder arranged so that the other end of the external force response member expands and is arranged at an external force detection location of the structure;
A first conductor member made of a conductor and having one end inserted into one of the first container or the second container of each of the external force responsive members, and one end made of a conductor and each of the external force responsive members A set of second conductor members inserted in a second insertion location different from the first insertion location in one of the first container or the second container, and n sets,
An electrical continuity detection means for detecting electrical continuity and attached to the other end of the first conductor member and the other end of the second conductor member;
When an external force exceeding a predetermined value is applied to the external force detection location of the structure, at least one second container of the n external force response members is broken and the second enclosure is Leakage into the first enclosure, the second enclosure and the first enclosure are mixed to produce an electrolyte solution, and electrical conduction is conducted through the first conductor member and the second conductor member. A detection means detects that an external force exceeding a predetermined value is applied to an external force detection portion of the structure.
[0011]
In the structure external force detection device, preferably, the number of the external force response members is three, and one end of the three external force response members is joined while being concentrated on a reference point. The external force responder is configured such that the other end is positioned on three axes orthogonal to each other at the reference point.
[0012]
In the structure external force detecting device, preferably, the number of the external force response members is four, and one end of the four external force response members is concentrated on a reference point and joined, and the four external force response members are joined. The external force responder is configured such that the other end of the member is positioned at each vertex of the regular tetrahedron.
[0013]
In the structure external force detection device, preferably, the flexible material includes a synthetic resin material.
[0014]
In the structure external force detection device, preferably, the brittle material includes glass, a ceramic material, or a ceramic material.
[0015]
In the structure external force detection device, preferably, the first enclosure is a liquid first substance, the second enclosure is a liquid second substance, and the first substance and An electrolyte material is included in at least one of the second materials.
[0016]
In the structure external force detection device, preferably, the first enclosure is a solid third substance, the second enclosure is a liquid fourth substance, and the third substance is An electrolyte material is included, and the fourth material includes water.
[0017]
In the structure external force detection device, preferably, the electrical continuity detection means includes an ammeter, a voltmeter, or an electrical resistance meter.
[0018]
In the structure external force detection device, preferably, the external force responder concentrates and joins one end of the three external force response members to a reference point and the other end of the three external force response members. Has three attachment members that hold the three reference axes at positions on three axes that are orthogonal to each other.
[0019]
In addition, the structure external force detection device preferably includes four attachment members that hold the other external force response members so that the other end of each of the four external force response members is positioned at each vertex of the regular tetrahedron.
[0020]
Further, the external force detection method for a structure according to the present invention includes:
A first container made of a flexible material and encapsulating the first enclosure, and a second enclosure made of a brittle material and mixed with the first enclosure to produce an electrolyte solution are enclosed in the first container. It has n (n: an integer greater than or equal to 3) external force response members configured in a rod shape with a second container to be accommodated, and one end of each of the external force response members is concentrated and joined. An external force responder arranged so that the other end of the external force response member expands and is arranged at an external force detection location of the structure;
A first conductor member made of a conductor and having one end inserted into one of the first container or the second container of each of the external force responsive members, and one end made of a conductor and each of the external force responsive members A set of second conductor members inserted in a second insertion location different from the first insertion location in one of the first container or the second container, and n sets,
Using electrical continuity detection means for detecting electrical continuity while being attached to the other end of the first conductor member and the other end of the second conductor member,
When an external force exceeding a predetermined value is applied to the external force detection location of the structure, at least one second container of the n external force response members is broken and the second enclosure is Leakage into the first enclosure, the second enclosure and the first enclosure are mixed to produce an electrolyte solution, and electrical conduction is conducted through the first conductor member and the second conductor member. A detection means detects that an external force exceeding a predetermined value is applied to an external force detection portion of the structure.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a structure damage detection system according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a more detailed configuration of the external force responder in the structure damage detection system shown in FIG. FIG. 3 is a cross-sectional view showing a more detailed configuration of the external force response member in the external force responder shown in FIG.
[0022]
As shown in FIG. 1 (A), this structural damage detection system 101 includes an external force responder S installed inside a concrete of a cast-in-place concrete pile 203 that is a foundation of a viaduct 200 that supports a railroad track 300; The connecting member 2, the external force detection / transmission unit 4, the communication cable 5, and the structure management unit 6 are configured.
[0023]
A part of the connecting member 2 is installed inside the concrete of the cast-in-place concrete pile 203 or the footing 202 of the viaduct 200, and the rest is arranged outside the viaduct 200. Moreover, although the connection member 2 is mentioned later, the four individual connection members 20 are accommodated in the inside.
[0024]
As shown in FIG. 3B, each individual connection member 20 has a lead wire 22, and has a structure in which the outside of the lead wire 22 is surrounded by a protection member 21. One end of the lead wire 22 is connected to the external force responder S, and the other end of the lead wire 22 is connected to the external force detection / transmission unit 4. The external force detection / transmission unit 4 and the structure management unit 6 are connected by a communication cable 5. Note that the external force responder S and a part of the connecting member 2 are arranged at predetermined locations before the concrete placement of the cast-in-place concrete pile 203 and the footing 202, and are embedded and installed in the concrete.
[0025]
Next, a more detailed configuration of the external force responder S will be described with reference to FIG. FIG. 2A is a perspective view showing the overall configuration of the external force responder S. FIG.
[0026]
As shown in FIG. 2A, the external force responder S includes four external force response members 1, 1, 1, and 1 and the roots of these four external force response members 1, 1, 1, and 1. It is configured to have four attachment members F that are joined by concentrating one end of the portion, and has a substantially tetrapod shape as a whole.
[0027]
In this external force responder S, as shown in FIG. 2A, the center point of the four attachment members F is the position of the center point (reference point) of the regular tetrahedron P, and the four external force response members The other ends of 1, 1, 1, and 1 are configured to be the positions of the vertices of the regular tetrahedron P.
[0028]
FIG. 2B is a perspective view showing a more detailed configuration of the four attachment members F in the external force responder S. FIG. As shown in FIG. 2B, the four attachment members F are configured by joining four columnar portions f1, f2, f3, and f4, which are cylindrical members, in a tetrapod shape. The columnar portions f1, f2, f3, and f4 are respectively formed with mounting recesses V1, V2, V3, and V4 having a circular cross-sectional shape at the tip portions, and the central portions of the four mounting members F from the bottom center of each recess. Conductive holes h1, h2, h3, and h4 having a circular cross section are formed toward the top. Therefore, the central axes of the guide holes h1, h2, h3, and h4 coincide with the straight line connecting the center of the regular tetrahedron P and each vertex. Further, although not shown, a communication hole that connects the center of the four mounting members F and the outside of the four mounting members F is also formed.
[0029]
Next, a more detailed configuration of the external force response member 1 will be described with reference to FIG. As shown in FIG. 3A, the external force response member 1 includes a first container 11, a second container 12, a first liquid 13, and a second liquid 14.
[0030]
The first container 11 is made of a flexible material (hereinafter referred to as “flexible material”) such as a plastics material or a rubber material, and is formed in a cylindrical shape having a hollow inside. Yes. Moreover, the lower end and upper end of the 1st container 11 are each obstruct | occluded by the disk-shaped member. A plurality of groove-like recesses 11 e surrounding the outer portion in an annular shape are formed on the outer side of the substantially cylindrical shape of the first container 11. Due to the plurality of annular recesses 11e, irregularities are formed on the surface portion of the external force response member 1 embedded in the cast-in-place concrete pile 203, improving the adhesion of the external force response member 1 to the concrete, and the stress in the pile Has the effect of improving the performance transmitted to the external force response member 1. In addition, an insertion hole 11 a for inserting a lead wire 22 to be described later is formed in the disk that is the upper end of the first container 11. A first liquid 13 is enclosed in the first container 11 and a second container 12 is accommodated therein.
[0031]
Here, the plastics material includes a composite material using plastic such as FRP (Fiber Reinforced Plastics) in addition to a so-called synthetic resin material. The rubber material includes natural rubber and artificial rubber, as well as composite materials using rubber.
[0032]
The second container 12 is made of a brittle material (hereinafter referred to as “brittle material”) such as a glass-based material, a ceramic material, or a ceramic-based material, and is formed in a cylindrical shape in which the inside is hollow. Yes. Moreover, the lower end and upper end of the 2nd container 12 are each obstruct | occluded by the disk-shaped member. The second liquid 14 is sealed inside the second container 12.
[0033]
Here, as a glass-type material, the composite material using glass other than what is called glass is included. Ceramic materials include ceramics, porcelain, and composite materials using these materials. In addition to so-called ceramics, ceramic materials include composite materials using these materials.
[0034]
An annular fixing member 15 is fitted in the insertion hole 11 a provided in the upper end disk of the first container 11. The fixing member 15 is formed of a flexible material such as a plastics material or a rubber material, and has a cylindrical opening at the center, and a later-described lead wire 22 is provided in the opening. It is inserted. The outer diameter of the lead wire 22 is slightly larger than the inner diameter of the opening of the fixing member 15, and the flexibility of the fixing member 15 is increased by pushing the lead wire 22 into the opening of the fixing member 15. The lead wire 22 is fitted by use, and the conductor exposed end portion 22 c of the lead wire 22 is inserted into the first liquid 13 in the first container 11.
[0035]
Further, distilled water is used as the first liquid 13. As the second liquid 14, an aqueous solution of salt (sodium chloride: NaCl) is used.
[0036]
The outer diameter of one end portion (the upper end portion in FIG. 3A) of the first container 11 of the external force response member 1 configured as described above is smaller than the inner diameter of the mounting recesses (for example, V1) of the four mounting members F. The one end portion (the upper end portion in FIG. 3A) of the first container 11 is configured to be accommodated in the mounting recesses (for example, V1) of the four mounting members F. .
[0037]
The outer diameter of the individual connection member 20 is set to a value smaller than the inner diameter of the guide holes (for example, h1) of the four attachment members F. For example, it is configured to be accommodated in h1).
[0038]
Although not shown, the outer diameter of the connecting member 2 including four individual connecting members 20 is larger than the inner diameter of the communication hole that connects the center of the four mounting members F and the outside of the four mounting members F. The connection member 2 is configured to be insertable into the communication holes of the four attachment members F.
[0039]
With the configuration as described above, one end portion (the upper end portion in FIG. 3A) of the first container 11 of the external force response member 1 is joined to the mounting recesses (for example, V1) of the four mounting members F with an adhesive or the like. Then, the individual connection members 20 of each external force response member 1 are inserted through the corresponding guide holes (for example, h1), and the four individual connection members 20 gathered at the center of the four attachment members F are used as springs. The connecting member 2 can be pulled out from the communication holes of the four mounting members F.
[0040]
Next, a case where a large external force, for example, a force due to earthquake motion is applied to the above-mentioned cast-in-place concrete pile 203 and damage such as a crack occurs in the cast-in-place concrete pile 203 will be described as an example. A detailed configuration and operation of the structure damage detection system 101 will be described.
[0041]
As described above, when a large external force is applied to the cast-in-place concrete pile 203 so as to cause damage such as a crack in the cast-in-place concrete pile 203, stress is generated in the concrete. For this, the first container 11 of the external force response member 1 of the external force responder S embedded in any part of the concrete is formed of a flexible material, and thus, for example, is pulled. It is deformed to be compressed, bent, bowed or sheared. On the other hand, since the 2nd container 12 accommodated in the inside of the 1st container 11 is formed with the brittle material, it cannot endure a deformation | transformation more than a certain amount, and it fractures | ruptures.
[0042]
As a result, the second liquid 14 made of an aqueous sodium chloride solution contained in the second container 12 leaks into the first liquid 13 which is distilled water, and both the first liquid 13 and the second liquid 14 are used. Are mixed with each other to form a dilute aqueous sodium chloride solution.
[0043]
The diluted sodium chloride aqueous solution is an electrolyte solution. In the dilute sodium chloride aqueous solution, sodium chloride (NaCl) is ionized, and in the solvent water, there is a sodium ion Na ⁺ that is a positively charged cation and a negatively charged anion. Chlorine ion Cl ^- is present. For this reason, the diluted sodium chloride aqueous solution exhibits electrical conductivity.
[0044]
As shown in FIG. 3D, the lead wire 22 inserted into the first container 11 has a first conductor member 22a, a second conductor member 22b, and an insulating member 22c. . The first conductor member 22a and the second conductor member 22b are linear members formed of an electric conductor (conductor), for example, copper (Cu). The insulating member 22c is formed of an electrical non-conductor, such as a synthetic resin material or a rubber material, and has a predetermined interval between the first conductor member 22a and the second conductor member 22b and surrounds them. The first conductor member 22a and the second conductor member 22b, the first conductor member 22a and the periphery thereof, and the second conductor member 22b and the periphery thereof are electrically insulated.
[0045]
FIG. 4 is a block diagram showing a more detailed configuration of the external force detection / transmission unit 4 in the structure damage detection system shown in FIG.
[0046]
As shown in FIG. 4A, the external force detector / transmitter 4 includes a housing 40, an electrical continuity detector 41, an amplifier 42, an A / D converter 43, input / output interfaces 44a and 44b, and a CPU 45. A ROM 46, a RAM 47, and a transmitter 49. Moreover, the housing 40 is attached to the pillar 201 of the viaduct 200 as shown in FIG. 1 (A), for example.
[0047]
As shown in FIG. 4B, the electrical continuity detector 41 has a DC power supply 41a and an ammeter 41b, and the first conductor member 22a is electrically connected to the anode of the DC power supply 41a. Also, one terminal of the ammeter 41b is electrically connected to the cathode of the DC power supply 41a, and the second conductor member 22b is electrically connected to the other terminal of the ammeter 41b.
[0048]
With such a configuration, when an external force acts on the external force response member 1 and the second container 12 is broken, both the first liquid 13 and the second liquid 14 are mixed with each other to form a diluted sodium chloride aqueous solution. Sodium aqueous solution shows electrical conductivity. Therefore, as shown by the wavy line in FIG. 3D or FIG. 4A, the end 22a1 where the first conductor member 22a is exposed in the first liquid and the second conductor member 22b are in the first liquid. A current i flows between the end portions 22b1 exposed to.
[0049]
This current i reaches the ammeter 41b through the second conductor member 22b and is detected. When the current i is detected, the ammeter 41b outputs that the current is detected as an electric signal (for example, current). The current output from the electrical continuity detector 41 is amplified by the amplifier 42. The amplified current is converted from an analog amount into a digital amount by the A / D converter 43 and sent to the CPU 45 via the input / output interface 44a.
[0050]
Although not shown, a CPU (Central Processing Unit) 45 has an internal bus which is a signal line for sending and receiving current (signal) inside the CPU 45. The bus has an operation unit, a register, a clock generation unit, an instruction processing unit, and the like. The arithmetic unit in the CPU 45 generally performs four arithmetic operations (addition, subtraction, multiplication, and division) or various logical operations (logical product, logical sum, negation, exclusive) on various data stored in the register. This is a portion for performing processing such as logical sum or data comparison or data shift. In general, the result of the processing is stored in a register.
[0051]
The register is generally a part for storing one word of data. Usually, a plurality of registers are provided in the CPU 45. The clock generator is a part that generates a clock signal (clock signal) for synchronizing the time of each part of the CPU 45. The CPU 45 operates based on this clock signal. The instruction processing unit is a part that controls and processes fetching, decoding, and execution of instructions to be executed by the arithmetic unit and the like.
[0052]
A ROM (Read Only Memory) 46 is a part that stores a control program for controlling the CPU, various data used by the CPU, and the like. The ROM includes a semiconductor chip and a hard disk device. Although not shown, the hard disk device has a disk-shaped magnetic disk therein, and the magnetic disk is rotated by a disk drive mechanism, and the magnetic head is moved to an arbitrary position of the magnetic disk by a head drive mechanism. The data is recorded by magnetizing the magnetic film on the surface of the magnetic disk with a write current from the magnetic head, and flows to the coil of the magnetic head when the magnetic head moves over the magnetized magnetic film. It is a device that reads recorded data by detecting current.
[0053]
In the above control program, in addition to the basic software of the CPU 45 such as an OS (Operating System), processing procedures such as instructions for causing the CPU 45 to execute various processes and analysis operations are described in a predetermined program language. A set of characters and symbols.
[0054]
A RAM (Random Access Memory) 47 is a part for temporarily storing intermediate data calculated by the CPU 45. The RAM is mainly composed of semiconductor chips.
[0055]
With the configuration as described above, when the CPU 45 detects the electrical signal from the electrical continuity detector 41, the CPU 45 determines that "the pile concrete at the location of the external force response member 1 that exhibits electrical conductivity has been damaged" Information for specifying the position and the like of the pile (for example, data such as the position coordinates of the position of the pile) is added to data such as a flag expressing “damage to the pile” and a digital output signal is generated.
[0056]
The digital electrical signal generated by the CPU 45 is sent to the transmitter 49 via the input / output interface 44b. The transmitter 49 converts the digital electric signal as it is or converts it into another signal form (for example, an optical signal) and transmits it to the structure management unit 6 through the communication cable 5. As the communication cable 5, a conducting wire that conducts current, an optical fiber, or the like is used.
[0057]
The structure management unit 6 has a configuration as shown in FIG. In other words, the structure management unit 6 is a facility that centrally manages structures related to railway tracks in a certain railway line section (for example, “Yamanote Line”, “Saikyo Line”, etc.). The structure state display board 62 and the storage / output device 63 are provided.
[0058]
The central computer 61 is connected to each structure of this line section, for example, the communication cables 5a to 5d from the external force detection / transmission unit of each pile in the viaduct so that data from the structure is concentrated. It has become. As shown in FIG. 1B, the structure state display board 62 includes a display panel unit 62a and a console 62b. The entire display section 62a is displayed on the display panel unit 62a, and a structure such as a pile is represented by a lamp or the like. With such a configuration, the place where the damage has occurred is in a state where the operator (structure manager) can visually recognize, for example, a lamp is lit or flashing, as shown by 62c in FIG. . The storage / output device 63 is a device that stores a damage history or the like in a recording medium or performs printing or the like.
[0059]
The structure damage detection system 101 according to the first embodiment described above has the following advantages.
[0060]
a) When a large external force (for example, seismic motion or the like) is applied to a railway structure or the like and damage occurs, the position of the damaged portion can be easily detected in real time.
[0061]
b) Since it is built inside the ground G like an underground structure such as a pile, it is possible to detect damage to a portion that cannot be seen without any trouble.
[0062]
c) It is possible to centrally monitor the presence or absence of damage to each structure in a facility extending over a long line, such as a railway or a road.
[0063]
d) At each detection position, not only one external force response member 1 but also four external force response members 1 are installed in different directions, respectively, and it is possible to detect the stress component corresponding to each direction. Become. For this reason, it is also possible to estimate the type and strength of the stress acting on the position where the damage has occurred.
[0064]
In the first embodiment described above, the structure external force detection system 101 corresponds to the structure external force detection device in the claims. The first liquid 13 corresponds to the first inclusion body and the first substance in the claims, and the second liquid 14 corresponds to the second inclusion body and the second substance in the claims. Further, the electrical continuity detector 41 and the CPU 45 of the external force detection / transmission unit 4 correspond to electrical continuity detection means in the claims. The exposed end portion 22a1 of the first conductor member 22a corresponds to a first insertion location in the claims, and the exposed end portion 22b1 of the second conductor member 22b corresponds to a second insertion location in the claims. is doing.
[0065]
In addition, when the electrical continuity of the external force response member 1 occurs by adjusting the breaking strength of the second container 12 and setting it to a predetermined strength value, the CPU 45 determines that “the cast-in-place concrete pile 203 concerned” It can also be configured to quantitatively calculate that a predetermined external force value has been added to the external force responder installation location, and to transmit that fact to the structure management unit 6.
[0066]
Further, by appropriately devising the arrangement state of the external force response member 1, for example, the external force response member 1 is arranged at a plurality of positions where the vertical height positions in the pile 203 are different, and the vicinity of the center of the pile and its surroundings. By arranging the external force response member 1 at different positions, the CPU 45 can calculate the predetermined external force value applied to the pile 203 quantitatively by calculating backward from the damage state inside the pile 203.
[0067]
The present invention is not limited to the embodiment described above. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.
[0068]
For example, in the above-described embodiment, the external force responder (for example, S) has been described with respect to an example in which four external force response members (for example, 1) are arranged in a regular tetrahedron shape. Without being limited, the external force responder may have other configurations. For example, the number of external force response members used in the external force responder is not limited to four but may be three. In the case of three, one end of the three external force response members is concentrated and joined to the reference point, and the other end of the three external force response members is positioned on three axes that are orthogonal to each other at the reference point. Install in. That is, in this case, the external force response member is arranged so as to extend in the X, Y, and Z axis directions of the three-dimensional coordinate system, and the center of the member (three attachment members) that joins the root portions is set to the coordinate origin. It arrange | positions in a position and the position of the three external force response members 1 is fixed by these three attachment members. Alternatively, the number of external force response members may be 5 or more.
[0069]
Moreover, in the said embodiment, although the example using a distilled water as a 1st enclosure and using sodium chloride aqueous solution as a 2nd enclosure was demonstrated, this invention is not limited to this, For example, other structures, for example, The first inclusion body and the second inclusion body may be reversed.
[0070]
Moreover, the combination of a 1st inclusion body and a 2nd inclusion body is also possible by the combination of another substance. The point is that the electrolyte solution only needs to be generated when the second container breaks and the second enclosure leaks into the first enclosure and is mixed. Therefore, for example, a combination in which the first inclusion body is water (distilled water, pure water, etc.) and the second inclusion body is an electrolyte solid or an electrolyte solution.
[0071]
A combination in which the first enclosure is an electrolyte solid and the second enclosure is water (distilled water, pure water, etc.) or an aqueous electrolyte solution is also possible. In this case, the first enclosure corresponds to the third substance in the claims, and the second enclosure corresponds to the fourth substance in the claims. Examples of the electrolyte include acids such as sulfuric acid, alkali substances such as sodium hydroxide, salts generated by a reaction between an acid and an alkali, and other compounds.
[0072]
The shapes of the first container and the second container are not limited to the above-described cylindrical shape, and may be other shapes, for example, a cylindrical shape with an elliptical cross section, a cylindrical shape with a polygonal cross section, or the like. Moreover, the shape of the unevenness formed on the outer surface of the first container includes an annular convex part, a spiral convex part or concave part, a number of warped convex parts, a number of hole-shaped concave parts, etc. There may be.
[0073]
3 (C) and 3 (D), the end 22a1 where the first conductor member 22a is exposed in the first liquid (first insertion position in the claims) and the second conductor Although the member 22b is illustrated as having a step at the position of the end 22b1 (second insertion position in the claims) where the member 22b is exposed in the first liquid, the present invention is not limited to this example. In other configurations, for example, a configuration in which there is no step between the exposed end portions 22a1 and 22b1 (for example, an arrangement in which both are in the same horizontal position in FIGS. 3C and 3D). There may be.
[0074]
Moreover, the structure of the 1st insertion location and 2nd insertion location which insert a 1st conductor member and a 2nd conductor member in an external force responder is not limited to the structure shown in FIG.3 (C) and FIG.3 (D). Other configurations may be used. In short, the electrolyte solution does not exist between the first conductor member and the second conductor member before the second container is broken, and the first conductor member and the second conductor are not broken between the second container and the second container. What is necessary is just to be comprised so that electrolyte solution may be satisfy | filled between members. Therefore, the exposed end portion of the first conductor member may be inserted into the first container or may be inserted into the second container. Further, the exposed end portion of the second conductor member may be inserted into the first container or may be inserted into the second container. Therefore, the exposed end portion of the first conductor member may be inserted into the first container, and the exposed end portion of the second conductor member may be inserted into the second container. In the case of such a configuration, both the first inclusion body and the second inclusion body may be an electrolyte solution. This is because if the second container is sufficiently electrically insulated, no current flows between the first conductor member and the second conductor member before the second container breaks.
[0075]
The degree of flexibility of the first container and the degree of brittleness of the second container can be set as appropriate. Depending on how these values are set, the external force and the degree of damage of the structure to be detected can be adjusted. Further, if the outer diameter of the second container is set slightly smaller than the inner diameter of the first container, the second container can be easily broken even with a small external force.
[0076]
Moreover, the structure which is the object which detects an external force is not limited to a pile, Other foundation structures may be sufficient. Or structures other than a foundation structure may be sufficient.
[0077]
In addition, the arrangement position and arrangement state of the external force responder which is an external force responder are the same as those in the first embodiment described above, that is, one longitudinal direction of four external force response members (for example, 1) is vertically up and down. It is not limited to the state which becomes parallel to. Other states, for example, the state where the longitudinal direction of the external force response member (for example, 1) is parallel to the horizontal direction, or the state where the longitudinal direction of the external force responder is the direction of the tangent to the circle in the cross section of the pile, or any desired The inclination angle may be.
[0078]
Further, as the electrical continuity detecting means, a voltmeter or an electric resistance meter may be used instead of the above-described ammeter.
[0079]
【The invention's effect】
As described above, according to the present invention, the first container that is made of a flexible material and in which the first enclosure is enclosed and the first enclosure that is made of a brittle material and mixed with the first enclosure are used to generate the electrolyte solution. 2 It has n (n: an integer greater than or equal to 3) external force response members configured in a rod shape with a second container enclosed and contained in the first container, and one end of each external force response member The external force response members arranged at the external force detection portion of the structure and the one end of each external force response member are connected to each other, and the other end of each external force response member expands. Or the 1st conductor member inserted in the 1st insertion place inside the 2nd container, and the 1st insertion place in the inside of the 1st container of each external force response member which consists of a conductor, or each 2nd container N sets of second conductor members inserted in different second insertion locations; Since it is configured to include electrical continuity detection means for detecting electrical continuity while being attached to the other end of the first conductor member and the second conductor member, an external force exceeding a predetermined value is applied to the external force detection location of the structure. In such a case, the second container breaks and the second enclosure leaks into the first enclosure, and the second enclosure and the first enclosure are mixed to produce an electrolyte solution. It has an advantage that it can be easily detected that an external force exceeding a predetermined value is applied to the external force detection portion of the structure, which is detected by the electrical continuity detecting means via the first conductor member and the second conductor member. . Further, at each detection position, not only one external force response member but four four are installed in different directions, respectively, and it is possible to detect the stress component corresponding to each direction. . For this reason, it also has an advantage that it is possible to estimate the type and strength of the stress applied to the position where the damage has occurred.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a structure damage detection system according to a first embodiment of the present invention.
2 is a perspective view showing a more detailed configuration of an external force responder in the structure damage detection system shown in FIG. 1; FIG.
3 is a cross-sectional view showing a more detailed configuration of an external force response member in the external force responder shown in FIG. 2. FIG.
4 is a block diagram showing a more detailed configuration of an external force detection / transmission unit in the structure damage detection system shown in FIG. 1; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 External force transponder 2 Connection member 3 Structure insertion member 4 External force detection and transmission part 5-5d Communication cable 6 Structure management part 11 1st container 11a Insertion hole 11e Annular recessed part 12 2nd container 13 1st liquid 14 2nd Liquid 15 Fixing member 16 Joining member 20 Individual connection member 21 Protective member 22 Lead wire 22a First conductor member 22a1 Conductor exposed end 22b Second conductor member 22b1 Conductor exposed end 22c Insulating member 40 Housing 41 Electrical continuity detector 41a DC Power supply 41b Ammeter 42 Amplifier 43 A / D converters 44a and 44b Input / output interface 45 CPU
46 ROM
47 RAM
49 Transmitter 61 Central Computer 62 Structure Status Display Panel 62a Display Panel Unit 62b Console 62c Damage Location 63 Memory / Output Device 101 Structure Damage Detection System 200 Viaduct 201 Pillar 202 Footing 203 Cast-in-place Concrete Pile 204 Insertion Hole 300 Railway Line F Four mounting members f1 to f4 Column-shaped portions h1 to h4 Guide hole G Ground i Current P Regular tetrahedron S External force responder V1 to V4 Mounting recess

Claims (11)

A first container made of a flexible material and encapsulating the first enclosure, and a second enclosure made of a brittle material and mixed with the first enclosure to produce an electrolyte solution are enclosed in the first container. It has n (n: an integer greater than or equal to 3) external force response members configured in a rod shape with the second container to be accommodated, and one end of each of the external force response members is concentrated and joined. An external force responder arranged so that the other end of the external force response member expands and is arranged at an external force detection location of the structure;
A first conductor member made of a conductor and having one end inserted into one of the first container or the second container of each of the external force responsive members, and one end made of a conductor and each of the external force responsive members A set of second conductor members inserted in a second insertion location different from the first insertion location in one of the first container or the second container, and n sets,
An electrical continuity detection means for detecting electrical continuity and attached to the other end of the first conductor member and the other end of the second conductor member;
When an external force exceeding a predetermined value is applied to the external force detection location of the structure, at least one second container of the n external force response members is broken and the second enclosure is Leakage into the first enclosure, the second enclosure and the first enclosure are mixed to produce an electrolyte solution, and electrical conduction is conducted through the first conductor member and the second conductor member. A structure external force detection device which detects that an external force exceeding a predetermined value is applied to an external force detection portion of the structure detected by a detection means. In the structure external force detection device according to claim 1,
The number of the external force response members is three, and one end of the three external force response members is joined while being concentrated on a reference point, and the other end of the three external force response members is three at the reference point. A structure external force detecting device, wherein the external force responder is configured to be positioned on an axis. In the structure external force detection device according to claim 1,
The number of the external force response members is four, and one end of the four external force response members is joined while being concentrated on a reference point, and the other end of the four external force response members is positioned at each vertex of the regular tetrahedron. The external force responder is configured as described above, and the structure external force detector. In the structure external force detection device according to claim 1,
The structure external force detection device, wherein the flexible material includes a synthetic resin material. In the structure external force detection device according to claim 1,
The structural external force detection device, wherein the brittle material includes glass, a ceramic material, or a ceramic material. In the structure external force detection device according to claim 1,
The first inclusion body is a liquid first substance, the second inclusion body is a liquid second substance, and an electrolyte substance is contained in at least one of the first substance and the second substance. Structure external force detection device characterized by. In the structure external force detection device according to claim 1,
The first inclusion body is a solid third substance, the second inclusion body is a liquid fourth substance, the third substance contains an electrolyte substance, and the fourth substance contains water. A structure external force detector. In the structure external force detection device according to claim 1,
The electrical continuity detecting means includes an ammeter, a voltmeter, or an electric resistance meter. In the structure external force detection device according to claim 2,
The external force responder is formed by concentrating and joining one end of the three external force response members to a reference point, and the other end of the three external force response members is a position on three axes orthogonal to each other at the reference point. A structure external force detection device having three mounting members for holding the structure. In the structure external force detection device according to claim 3,
The external force responder concentrates and joins one end of the four external force response members to a reference point, and holds the other end of the four external force response members at the position of each vertex of the regular tetrahedron. A structure external force detection device comprising four mounting members. A first container made of a flexible material and containing a first enclosure;
An external force response member made of a brittle material and having a second container encapsulated with a second enclosure for producing an electrolyte solution by mixing with the first enclosure and having a second container accommodated in the first container. n (n: an integer of 3 or more) or more, one end of each external force response member is concentrated and joined, and the other end of each external force response member is expanded to be arranged at an external force detection location of the structure An external force responder,
A first conductor member made of a conductor and having one end inserted into one of the first container or the second container of each of the external force responsive members, and one end made of a conductor and each of the external force responsive members A set of second conductor members inserted in a second insertion location different from the first insertion location in one of the first container or the second container, and n sets,
Using electrical continuity detection means for detecting electrical continuity while being attached to the other end of the first conductor member and the other end of the second conductor member,
When an external force exceeding a predetermined value is applied to the external force detection location of the structure, at least one second container of the n external force response members is broken and the second enclosure is Leakage into the first enclosure, the second enclosure and the first enclosure are mixed to produce an electrolyte solution, and electrical conduction is conducted through the first conductor member and the second conductor member. A method for detecting an external force of a structure, characterized by detecting that an external force exceeding a predetermined value is applied to an external force detection location of the structure, which is detected by a detection means.

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