KR102542603B1 - structural displacement detecting device and monitoring system adopting the device - Google Patents

Abstract

The present disclosure relates to a displacement detection device and system for detecting and alerting displacement occurrences. Displacement detection device: A base corresponding to the first displacement element of the displacement detection target; an actuator corresponding to the second displacement element of the displacement detection target and capable of relative movement with respect to the base; a power generation unit that is fixed in position with respect to the base and generates power by interfering with the movement of the actuator; And a warning signal transmission unit for transmitting a displacement generation signal using power from the power generation unit when the power generation unit operates.

Description

Structural displacement detecting device and monitoring system adopting the device}

The present disclosure relates to a structure displacement detection device and system, and more particularly, to a wireless structure displacement detection device that does not require an external power supply and a system applying the same.

There are various methods for detecting cracks in bridges or buildings.

These methods include a method using a laser pulse, a method using an optical distance sensor, a method using a mechanical displacement meter, a method using point cloud data by LIDAR, a method using images, a method using MEMS devices, and a method using optical fibers. do.

These existing methods apply a system that monitors and manages the degree of cracks by quantitatively and continuously monitoring the amount of displacement or deformation. If installation and operation are not easy, the cost is also high.

The research of a cheaper and easier-to-operate system is a major task in the research of these detection systems. In addition to the expensive method of quantitatively monitoring the amount of deformation, the research of a simple system that critically detects the state of cracks is also desirable.

KR 10-2012-0085040 A KR 10-2010-0048675 A KR 10-1255022 B KR 10-2021-0054666 A

Ryu Seung-gi, Munhak-ryong - Development of a wireless communication-based displacement sensor module for measuring structural deformation of bridge structures - Journal of the Korean ITS Society - Vol. 9, No. 5, pp.87~95

The present disclosure proposes a device for detecting displacement of a structure and a monitoring system applying the same.

The present disclosure proposes a displacement detection device that operates without an external power supply and a monitoring system applying the same.

In addition, the present disclosure proposes a wireless displacement detection device that operates by its own power without externally supplied power and a monitoring system applying the same.

Displacement detection device according to the present disclosure:

a base corresponding to the first displacement element of the displacement monitoring target structure;

an actuator corresponding to the second displacement element of the displacement detection target and capable of relative movement with respect to the base;

a power generation unit that is fixed in position with respect to the base and generates power by interfering with the movement of the actuator; and

A warning signal transmission unit for transmitting a displacement generating signal using power from the power generation unit when the power generation unit operates; may be provided.

According to an embodiment of the present disclosure, the warning signal transmission unit may include a signal generation unit generating a displacement generation signal during operation and a signal transmission unit transmitting the displacement generation signal.

According to one embodiment of the present disclosure, the actuator may be an operating button for operating the power generation unit, and the base may be a substrate for fixing the power generation unit.

According to one embodiment of the present disclosure, a single-joint or multi-joint support may be provided between the first displacement element and the base.

According to an embodiment of the present disclosure, the warning signal transmission unit includes a signal generation unit generating a displacement generation signal by the operation of the power generation unit, a line signal transmission unit transmitting the displacement generation signal, And it may include a power supply unit that converts power from the power generation unit into used power.

According to one embodiment of the present disclosure, the signal transmitted to the signal transmission unit may include a unique number of the corresponding displacement detection device.

According to one embodiment of the present disclosure, the warning signal transmission unit may include a radio signal transmission unit.

According to one embodiment of the present disclosure, the support unit includes a first support arm and a second support arm, a ball joint between the first support arm and the second support arm, and a first fixing member fixed to the first displacement element, , The first support arm may be physically connected to the base, and the second support arm may be rotatably coupled to the first fixture.

According to one embodiment of the present disclosure, a pressing unit having a single-joint or multi-joint structure may be provided between the second displacement element and the actuator.

According to one embodiment of the present disclosure, the pressing unit includes a first pressing arm and a second pressing arm, a ball joint between the first pressing arm and the second pressing arm, and a second fixing table fixed to the second displacement element, , The first pressure arm is installed close to the actuator to be contactable and detachable, and the second pressure arm can be rotatably coupled to the second fixture.

Displacement generation monitoring system according to the present disclosure: silver

The displacement detection device according to any one of claims 1 to 7, which is installed in a plurality of displacement detection target structures in a distributed manner; and,

and a control system having a receiver for receiving signals from the plurality of distributed displacement detection devices and monitoring the occurrence of displacement in the displacement detection target structure.

According to one embodiment of the monitoring system of the present disclosure,

The pressure unit includes a first pressure arm and a second pressure arm, a ball joint between the first pressure arm and the second pressure arm, and a second fixture fixed to the second displacement element,

The first pressing arm is installed close to the actuator to be able to contact and separate, and

The second pressure arm may be rotatably coupled to the second holder.

According to an embodiment of the monitoring system of the present disclosure, the displacement detection device may be installed in a plurality of displacement detection target structures, and the control system may monitor displacement of the plurality of displacement detection target structures.

According to an embodiment of the monitoring system of the present disclosure, the displacement detection device may apply any one of Wi-Fi, Bluetooth, and ZigBee communication methods.

The present disclosure presents a non-powered remote displacement detection device that operates without power. The displacement detection device applies a small generator operated by a displacement generating part when displacement occurs. The power generated by the small generator is a triggering signal of the displacement generating signal, and is used as an operating current of a circuit unit that generates and transmits this signal. That is, displacement generation operates a small generator, and power generated therein operates the circuit unit to transmit a displacement generation signal wired or wirelessly. This non-powered remote displacement detection device is a self-powered type and has an independent installation module structure, and therefore is not significantly restricted in the installation environment for the displacement detection target.

1 is a perspective view showing a schematic appearance of a displacement detection device having a basic structure according to an embodiment of the present disclosure.
2 is a block diagram schematically showing an internal circuit configuration of a displacement detection device according to an exemplary embodiment of the present disclosure.
3 schematically illustrates a use example of the displacement occurrence detection device according to the present disclosure.
4 illustrates a displacement generating device according to another embodiment of the present disclosure.
FIG. 5 is a perspective view of the displacement generating device shown in FIG. 4 viewed from the bottom.
6 shows an installation example of the displacement detection device shown in FIGS. 4 and 5 .
7 is a schematic exploded perspective view showing an expanded internal configuration of a displacement detection device according to another embodiment of the present disclosure.
8 is a perspective view showing an internal structure of a body of a displacement detection device according to another embodiment of the present disclosure.
9 is a plan view showing the internal structure of the body of the displacement detection device shown in FIG. 8;
10 is a perspective view of an assembly of a substrate-power generation unit according to an embodiment of the present disclosure.
11 is a front view of the assembly of the substrate-power generation unit shown in FIG. 10;
12 is a bottom view of the assembly of the substrate-power generation unit shown in FIG. 10;
13 is a schematic exploded perspective view of a power generation unit according to an embodiment of the present disclosure.
14 is a front view of the center core 302c of the stationary coil unit 302 viewed from the front.

Hereinafter, preferred embodiments of the concept of the present invention will be described in detail with reference to the accompanying drawings. However, embodiments of the inventive concept may be modified in many different forms, and the scope of the inventive concept should not be construed as being limited due to the embodiments described below. Embodiments of the inventive concept are preferably interpreted as being provided to more completely explain the inventive concept to those with average knowledge in the art. The same sign means the same element throughout. Further, various elements and areas in the drawings are schematically drawn. Accordingly, the inventive concept is not limited by the relative sizes or spacings drawn in the accompanying drawings.

Terms such as first and second may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and conversely, a second element may be termed a first element, without departing from the scope of the inventive concept.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the concept of the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the expression “comprises” or “has” is intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features or It should be understood that the presence or addition of a number, operation, component, part, or combination thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical terms and scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the concept of the present invention belongs. In addition, commonly used terms as defined in the dictionary should be interpreted as having a meaning consistent with what they mean in the context of the technology to which they relate, and in an overly formal sense unless explicitly defined herein. It will be understood that it should not be interpreted.

When an embodiment is otherwise embodied, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order reverse to the order described.

The present disclosure proposes a self-powered displacement detection device installed in various dangerous structures such as buildings, bridges, rock walls, and temporary structures such as scaffolding and a system applying the same.

1 is a perspective view showing a schematic appearance of a displacement detection device 100 having a basic structure according to an embodiment of the present disclosure, and FIG. 2 is a block diagram schematically showing an internal circuit configuration of the displacement detection device 100. am.

Referring to FIG. 1 , an operating button 101 as an element of an operating body that is exposed to the outside of the bezel 111 and operated by an external force is installed in the main body 110 of the displacement detection device 100 . The displacement detection device 100 has an external structure similar to a switch, and when the operation button 101 installed in the bezel 111 moves, the power generation unit 300 built inside and a warning signal according to displacement occurrence The transmitter 103 is activated.

The operating button 101 operates the small power generation unit 3001 (FIG. 2) provided in the bezel 111 of the main body 110. The bezel 111 protects the power generation unit 300 and the signal generator 103 (FIG. 2) connected thereto and is designed to have a predetermined height. The height may have a size that can fit into a gap of the structure 200 to be displacement detected.

As shown in FIG. 2 , in the displacement detection device 100 according to an embodiment of the present disclosure, a power generation unit 300 generating low power by an external force by an operation button 101 is connected to a power supply unit 102. The power supply unit 102 is connected to the displacement warning signal transmission unit 103 to supply power required for its operation.

The operation button 101 may protrude to a normal position in an original state in a pressed state, or vice versa, the built-in power generation unit 300 may be operated while being pressed in a protruded normal position. That is, the upper operation button 101 is an actuator or a driven body that moves by external interference, and is pressed in a normal state protruded by external interference by a displacement element or pressed on the contrary, and then the bezel 111 The normal state is restored to the outside, and the above operation may be repeated once or several times depending on the type of external force. According to this operation, the power generation unit 300 ?裏? It generates power in the form of a pulse during a period of time.

The power supply unit 102 may include a power supply circuit equipped with a rectifier for converting pulsed alternating current into direct current, a capacitor or supercapacitor for storing power without loss, and a DC-DC converter for converting input power into a usable potential. . The displacement occurrence warning signal transmitter 103 includes a signal generator 103a that generates a signal indicating that displacement has occurred and a signal transmitter 103b that transmits a displacement generation signal. The signal generating unit 103a may include a unique number of the corresponding displacement generating device in the displacement generating signal.

The signal generation unit 103a generates a displacement generation signal indicating that displacement has occurred, and the signal transmission unit 103b receives the displacement generation signal and transmits it to a management server (not shown) of the control center, which is the management subject, , In this case, a wired or wireless transmission method using an antenna 103c may be applied.

The displacement detection device 100 according to the present disclosure does not detect and transmit a displacement value that continuously changes, but detects and transmits an abnormal displacement when the displacement exceeds a certain threshold value allowed for safety.

The power generation unit 300 operated by the operation button 101 detects displacement as a power signal and transmits the power to the power supply unit 102 so that it can be used as power necessary for circuit driving.

The signal generation unit 103a generates an arbitrary trigger signal corresponding to displacement when power is applied from the power supply unit, and the signal transmission unit 103b receiving the trigger signal receives displacement generation information corresponding to the detected displacement. A signal in the form of a specific code corresponding to is generated and transmitted to the server of the management entity through the antenna 103c.

FIG. 3 shows the displacement occurrence detection device 100 of FIG. 1 having a basic form in two first displacement elements 201 and second displacement elements 202 of a structure 200 that is a displacement detection target in which relative displacement may occur. Illustrate the installed state.

As shown in FIG. 3, the displacement detection device 100 according to the present disclosure is installed between two displacements, that is, first and second displacement elements 201 and 202 spaced apart at a predetermined interval. At this time, the operation button 101 may be completely pressed or pressed with appropriate elasticity. In this state, when a change in the distance between the two displacement elements 201 and 202 occurs, the operation button 101 of the displacement detection device 100 may be pressed or released from the pressed state. When the movement of the operation button 101 occurs in this way, a displacement generation signal is transmitted to a remote location through the signal generation and transmission process as described above.

The installation structure of the displacement generating device 100 illustrated in FIG. 3 is a case where two displacement elements 201 and 202 of the structure 200 that can cause relative displacement are adjacent to each other. Alternatively, it can be applied to two scaffolding pipes, bridges, etc., with a constant gap in close proximity.

The main body 110 is installed by a separate installation auxiliary structure as shown in FIG. 2, or two displacement elements 201 and 202 disposed adjacent to each other at a predetermined interval (w) as shown in FIG. ) can also be inserted between them.

However, unlike the installation structure illustrated in FIG. 3, the distance between the two displacement elements 201 and 202 varies from site to site. A force transmission structure by an arm device of a joint structure or a hinge (hinge) connection structure may be applied.

4 illustrates a displacement generating device according to another embodiment of the present disclosure in which an indirect force transmission structure is added so that the two displacement elements 201 and 202 can be installed in the structure 200 maintaining an irregular distance therebetween. 5 is a perspective view of the displacement generating device 100 viewed from the bottom. And, FIG. 6 shows an installation example of the displacement detection device 100 shown in FIGS. 4 and 5 .

The displacement detection device 100 shown in FIGS. 4 and 5 has an improved structure that can adapt to various distances between displacement elements 201 and 202 in the structure to be monitored 200 as shown in FIG. 6. have

The displacement detection device 100 installed in the structure to be monitored 200 is connected to the main body 110 that detects the occurrence of displacement above a threshold value and the structure to be monitored 200 capable of generating relative displacement by being connected to the main body 110 A pressing part 120 and a support part 130 are installed on the two displacement elements 201 and 202 respectively.

The support part 130 fixes the position of the main body of the displacement detection device 100 with respect to the displacement element 202 on one side, and the pressing part 120 has a main body whose installation position is fixed by the support part 130. A presser (finger) for interfering with or pressing the operation button 101 of the main body 110 with respect to (110) is fixed in position with respect to the displacement element 201 on the other side.

As shown in FIGS. 4 and 5, the pressing part 120 and the supporting part 130 are provided on both sides of the main body 110.

The support part 130 includes a supporting arm 132 directly connected to the bezel 111 of the body 110 and a first fixing table 131 fixing the support arm 132 to the displacement element 202 on one side. ) is equipped with

The support arm 132 has a central joint 132c and first support arms 132a and second support arms 132b on both sides thereof. Here, the second support arm 132b is fixed to the bezel 111 of the body 110, and the first support arm 132a is fixed to the first fixing table 131.

The pressing part 120 also has a joint 122c as a center, and a first pressing arm 122a and a second pressing arm 122b are provided on both sides thereof, and the first pressing arm 122a is a displacement element on the other side ( 201) is equipped with a second fixing table 121. The second pressing arm 122b has an L-shaped bent shape, and a pressing end or finger 122d for pressing the button 101 of the displacement detection device 100 is provided at an end thereof. The operating direction of the pressing finger 122d is the same as the operating direction of the operating button 101 .

The joints 122c and 132c on both sides are applied for the purpose of adjusting the overall length or angle of the support arm 132 and the pressing part 120. These ball joints 122c and 132c are pivotal balls (ball, J1b, J2b), as in a known general structure, one side into which the ball is rotatably inserted is open and bisected (split) in the longitudinal direction It has a round bowl-shaped socket (socket, J1s, J2s) and a locking bolt or clamping bolt (J1c) that fixes the ball to the socket.

The first and second fixtures 121 and 131 fixing the pressing part 120 and the support part 130 to the displacement elements 201 and 202 are fixed to the corresponding displacement elements 201 and 202, respectively. A fastening part mounting portion, for example, a screwable flange 121f, 131f is provided. On the other hand, as shown in FIG. 5, in preparation for the case where the displacement elements 201 and 202 are magnetic materials such as iron, the bottom surface of the main body 110, the pressing part 120 on both sides thereof, and the support part 130 In the fixed permanent magnet (110m, 120m, 130m) can be installed.

According to the above installation structure, when displacement occurs between the first displacement element 201 and the second displacement element 202 in a direction closer to each other, the pressing finger 122d presses the operation button 101, Therefore, the displacement generation signal is transmitted wirelessly or wired by the above-described operation.

Fig. 7 is a schematic exploded perspective view of the body 110 of the displacement detection device 100.

Looking at Figure 7, the lower case 112 of the main body 110, which acts as one element of the base supporting the power generation unit 300, has a substantially rectangular bottom portion 112b and a wall formed at a predetermined height along its edge. (112a), a guide bush (guide bush, 112c) is formed at the center of the bottom portion (112b) to support the plunger (plunger, 101a) of the operation button (101) while supporting vertical movement.

On the inner case 112, an assembly in which the substrate 400, which is one element of the base supporting the power generation unit 300, the operation button 101, and the power generation unit 300 are combined into one is positioned, and thereon the assembly A sealing portion 115 for sealing is provided. A bezel 111 in the form of a cover is positioned above the lower case 112, and functions as a box or enclosure for accommodating the power generation unit 300 and the warning signal transmission unit 103 together with the lower case 112. .

A displacement detection device according to the present disclosure includes a base corresponding to a first displacement element of a side object, an actuator corresponding to a second displacement element of the displacement measurement target and capable of relative movement with respect to the base, and a position fixed relative to the base. It is provided with a power generation unit that generates power by interfering with the movement of the actuator, and a warning signal transmission unit that transmits a displacement generation signal using power from the power generation unit when the power generation unit is operated.

In the specific structure described above, the base may include the substrate 400 on which the power generation unit 300 is mounted on one side or the case 112 supporting it, and the operating body includes the button 101. In this case, the base may include a case for supporting the substrate.

The operating body may include the pressing portion 120 as described above, and the support portion 130 may be included in the base.

8 is a perspective view showing the internal structure of the main body 110 of the displacement detection device 100, and FIG. 9 is a plan view showing the inside of the displacement detection device 100.

The inner case 112 of the main body 110 has a substantially square box shape, has a bottom portion 112b and a wall 112a formed at a predetermined height along the edge thereof, and has an operation button 101 at the center of the bottom portion 112b. A guide bush (guide bush, 112c) is formed to support the vertical movement while supporting the operation of the ) or the plunger (101a).

A warning signal transmitter 103 is provided on one side of the guide bush 112c and a power generation unit 300 is installed on the other side, which is supported by one substrate 400.

The power generation unit 300 includes a fixed coil unit 302, a moving magnet unit 304 corresponding thereto, a “c”-shaped rotation lever 303 to which the moving magnet unit 304 is mounted, and the rotation lever ( 303 is provided at the center of the front end and has an operating end 301 pressed by the plunger 101a of the operating button 101.

The operating end 301 is inserted into a vertical guide groove formed on one side of the guide bush 112c, and is thereby pressed against the lower end of the plunger 101a. At this time, a compression spring (not shown) is installed below the guide bush 112c, and thus the operating end 301 pressed by the plunger 101a is elastically biased by the compression spring below it.

The board 400 is provided with a warning signal transmitter 103 including the power supply unit 102, signal generator 103a, signal transmitter 103b, and antenna 103c mentioned in the description of FIG. 2 .

Fig. 10 is an excerpted perspective view of a substrate 400 and a power generation unit 300 mounted thereon, Fig. 11 is a front view, and Fig. 12 is a bottom view.

10 to 12, the substrate 400 serving as a platform has a portion where the warning signal transmitter 103 is formed and a portion where the power generation unit 300 is mounted.

A compression spring 305 is disposed under the operating end 301 of the power generation unit 300 to elastically support the operating end 301 upward, and thus both arms positioned on both sides of the fixed coil unit 302. The rotation lever 303 with is being forced upward. In this state, when force is applied to the operating end 301 from above, the pivoting lever 303 overcomes the force of the compression spring 305 and moves downward. ) generates induced power in the stationary coil unit 302 facing it while moving. The induced power generated here is pulsed power corresponding to the operation of the lever and is supplied to the power supply unit 102 of the warning signal transmitter 103, and then the displacement occurrence alarm is signaled to the signal transmitter 103b by the flow as described above. ) is sent via

13 is a schematic exploded perspective view showing a fixed coil unit 302 and a moving magnet unit 304 separated from each other in the power generation unit 300. Referring to FIG. Referring to FIG. 13 , fixing grooves 302 to which the rotation pins 303p are coupled are formed on both sides of the fixing yoke 302y of the fixed coil unit 302 .

And, the head of the moving magnet part 304 is protected by the permanent magnet 304m by moving yokes 304y on both sides (upper and lower in the drawing).

Fig. 14 is a front view of the center core 302c of the stationary coil unit 302 as viewed from the front. As shown, the above-described center core 302c is provided at the center of the fixed yoke 302y, and the center core 302c passes through the bobbin 302b around which the coil is wound. The front end of the center core 302c forms a magnetic path that crosses the upper and lower fixed yoke extensions 312 and the high magnetic force permanent magnet 304m of the moving magnet part 304.

In the displacement generation warning signal transmission unit 103 receiving power from the power generation unit 300 having the above structure, the signal transmission unit 103b uses any one of various known communication methods such as Bluetooth, Wi-Fi, ZigBee, etc. can be applied. Also, the signal transmitting unit transmits the unique information about the displacement generating device together with transmitting the displacement generating signal, so that the location where the displacement has occurred can be specified.

The displacement detection device of the present invention described above operates wirelessly, but generates power by an external force due to displacement without a separate external power source. The power generation unit that generates this power can be said to correspond to a mechanical-electrical sensor that primarily detects displacement, and the power generated here is an initial signal for displacement, and furthermore, the displacement is It is used as the driving power of the warning signal transmission unit notifying the occurrence, and the warning signal transmission unit transmits the displacement occurrence warning signal to the control center.

The displacement detection device may be installed in a plurality of structures. Displacement-based power generated by displacement in a specific structure is recognized as a displacement generation signal, and a warning signal transmission unit driven by this power displaces in a wired or wireless manner. An occurrence can be transmitted to notify a control system equipped with a receiver that receives displacement occurrence warning signals.

Since the displacement detection device of the present invention can be miniaturized and does not require a separate power source, it is possible to install it on elements that are concerned about displacement or monitored in a structure, and the control center detects it and detects displacement. Be aware of it and take action accordingly.

As described above, exemplary embodiments of the present invention have been described in detail, but those of ordinary skill in the art to which the present invention pertains, without departing from the spirit and scope of the present invention defined in the appended claims. Various modifications of the present invention may be practiced. Therefore, changes in future embodiments of the present invention will not deviate from the technology of the present invention.

100: displacement detection device
101: operation button
101a: plunger
102: power supply
103: (wired/wireless displacement occurs) warning signal transmitter
103a: signal generator
103b: signal transmission unit
103c: antenna
110: body
111: bezel
112: lower case
112a: wall
112b: bottom part
112c: guide bush
115: sealing part
120: pressing part
121: second fixture
122a: first pressing arm
122b: second pressure arm
122c: joint
122d: finger
130: support
131: first fixture
132a: first support arm
132b: second support arm
132c: joint
132: support arm
200: structure
201: first displacement element
202: second displacement element
300: power generation unit
400: substrate (base)

Claims (13)

a base corresponding to the first displacement element of the displacement detection target structure;
an actuator corresponding to the second displacement element of the displacement detection target and capable of relative movement with respect to the base;
a power generation unit that is fixed in position with respect to the base and generates power by interfering with the movement of the actuator; and
And a warning signal transmitter for transmitting a displacement generation signal using power from the power generation unit when the power generation unit is operated.
The operating body is an operating button operating the power generation unit, and
The displacement detection device of claim 1, wherein the base is a substrate for fixing the power generation unit. delete According to claim 1,
A displacement detection device comprising a support having a single-joint or multi-joint structure between the first displacement element and the base. According to claim 1,
The warning signal transmitter:
a signal generating unit generating a displacement generation signal by the operation of the power generation unit;
a signal transmission unit for transmitting the displacement generating signal; and
A displacement detection device comprising: a power supply unit that converts power from the power generation unit into used power. According to claim 4,
The displacement detection device of claim 1 , wherein a signal transmitted to the signal transmission unit includes a unique number of the corresponding displacement detection device. According to claim 4,
The warning signal transmission unit includes a radio signal transmission unit, displacement detection device. According to claim 3,
The support unit includes a first support arm and a second support arm, a ball joint between the first support arm and the second support arm, and a first fixture fixed to the first displacement element,
The first support arm is physically connected to the base, and
The displacement detection device of claim 1 , wherein the second support arm is rotatably coupled to the first fixing table. The method of claim 1 or any one of claims 3 to 7,
The displacement detection device of claim 1 , wherein a single-joint or multi-joint pressing unit is provided between the second displacement element and the actuator. According to claim 8,
The pressure unit includes a first pressure arm and a second pressure arm, a ball joint between the first pressure arm and the second pressure arm, and a second fixture fixed to the second displacement element,
The first pressing arm is installed close to the actuator to be in contact with and detachable from, and
The displacement detection device of claim 1 , wherein the second pressure arm is rotatably coupled to the second fixing table. The displacement detection device according to any one of claims 1 and 3 to 7, which is installed in a large number and distributed to the displacement detection target structure; and,
A control system including a receiving unit configured to receive signals from the plurality of distributed displacement detection devices and monitor the occurrence of displacement in the displacement detection target structure; According to claim 10,
A pressing part having a single-joint or multi-joint structure is provided between the second displacement element and the actuator,
The pressure unit includes a first pressure arm and a second pressure arm, a ball joint between the first pressure arm and the second pressure arm, and a second fixture fixed to the second displacement element,
The first pressing arm is installed close to the actuator to be in contact with and detachable from, and
The second pressure arm is rotatably coupled to the second fixture, the displacement occurrence monitoring system of the structure. According to claim 11,
The displacement detection device is installed in a plurality of displacement detection target structures,
The control system monitors the occurrence of displacement for the plurality of displacement detection target structures, the displacement occurrence monitoring system of the structure. According to claim 11,
The displacement detection device applies any one of Wi-Fi, Bluetooth, and Zigbee communication methods, a displacement occurrence monitoring system of a structure.

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