KR102224331B1 - System for warning and sensing collapse of retaining wall joint for slope - Google Patents

Abstract

The present invention relates to a system for sensing a collapse of a slope retaining wall joint part, and issuing an alarm, which senses a collapse of a retaining wall due to an earth pressure or a site environmental factor, and issues an alarm by being mounted on the retaining wall installed on a slope. The system of the present invention comprises: a collapse sensor unit installed on a joint part of a slope retaining wall, forming an electromagnet circuit adjacent to each other, mounted to be maintained in an electromagnet state through the electromagnet circuit, and provided to be released with the electromagnet state when the joint part of the slope retaining wall is collapsed; a controller unit for checking the electromagnet state of the collapse sensor unit in real time, recognizing a release signal of the electromagnet state of the collapse sensor unit generated when the joint part of the slope retaining wall is collapsed, issuing an alarm to inform a dangerous situation, and transmitting a retaining wall collapse situation to a server unit; and a server unit for wirelessly receiving and storing data on the retaining wall collapse situation transmitted by the controller unit, and displaying the same to enable an administrator or a user to recognize the same. According to the present invention, a displacement gauge applied with an electromagnet principle is installed on the slope retaining wall, such that an alarm is issued at a site while rapidly sensing a collapse when displacement or behavior occurs in a retaining wall due to an external factor. Also, sensing data of the joint part of the retaining wall is transmitted to the server unit, such that an administrator or a user can rapidly recognize a collapse of the joint part of the slope retaining wall and a dangerous situation.

Description

Collapse detection and warning system of slope retaining wall joints {SYSTEM FOR WARNING AND SENSING COLLAPSE OF RETAINING WALL JOINT FOR SLOPE}

The present invention relates to a collapsing detection and warning system of a retaining wall joint on a slope, and more particularly, a displacement gauge is mounted on a retaining wall installed on the slope, and displacement or behavior is generated in the retaining wall due to external factors. By recognizing the deviation due to disconnection of the connection state between sensors, it enables to detect the collapse quickly and accurately, and at the same time, it enables to generate an alarm by an alarm in the field. B It is related to the collapse detection and warning system of the joint of the retaining wall on the slope so that the user can quickly recognize this.

In general, a slope means a slope, which occurs during cutting or filling, and a retaining wall is installed to secure the safety of the slope that occurs when cutting or filling is performed in this way. do.

In addition, the retaining wall is also installed to prevent the outflow of soil from rivers, etc., and is installed to support the load on one side of the embankment or to prevent the collapse of the embankment.

In other words, a retaining wall is a wall formed by stacking blocks or the like, and is erected without a post.

However, since external force is applied to the retaining wall, which is a wall installed on the slope, due to the earth pressure and environmental factors at the site, it causes displacement or movement on the side of the retaining wall.If such displacement or behavior is severe, the joint on the retaining wall is easily separated and collapsed. Is being generated.

Accordingly, the industry is currently researching and developing devices and methods for detecting and monitoring the collapse of the joint side of the slope retaining wall, and proposes various forms and construction methods.

To this end, in Korean Patent Publication No. 10-2039000 (hereinafter referred to as'Patent Document 1'), "the display member provided at one end of the rod member and the rod member, and the insertion member and rod provided at the other end of the rod member. Includes at least two sensors that are spaced apart at a certain interval in the member, and when an external force is applied to the rod member, a rockfall or slope collapse occurs based on the difference in the detected displacement by comparing the displacement detected by the two or more sensors. It proposes and discloses a bar sensor for measuring slope collapse and a method for measuring slope collapse including the same.

However, the above-described Patent Document 1 has a special difference from the present invention proposed below in the technical configuration and method for measuring the slope side collapse.

In addition, in Korean Patent Publication No. 10-1244304 (hereinafter referred to as'Patent Document 2'), "The geogrid buried in the reinforced soil to detect the earth pressure or movement of the reinforced soil placed between the foundation stone and the block of the construction structure. A detection sensor installed; A control box that receives a detection signal generated by the operation of the detection sensor and selects a detection signal above a certain value to generate a result signal; And by receiving the result signal, selected from light, sound, or text It proposes and discloses a configuration for a geogrid-based ground deformation detection system for pre-collapse recognition including an output means for outputting information in one or more formats.

However, the above-described patent 2 is a configuration and method for recognizing collapse by installing a detection sensor in a geogrid buried in reinforced soil, and there is a special difference in the technical configuration and method from the present invention proposed below.

In addition, Korean Patent Publication No. 10-0920803 (hereinafter, referred to as'Patent Document 3') says, "The slope collapse risk detection sensor applied to the near-field wireless communication technology is installed in the target area of the slope collapse risk. It is possible to monitor whether the risk of slope collapse occurs in real time from a remote location, and to notify the risk of slope collapse by checking the values of the received surface displacement, underground displacement, and rain detection information and when the confirmed value exceeds a preset reference value. It proposes and discloses a configuration for a "slope collapse monitoring system and method including a control server unit for outputting a warning message and a warning sound."

However, the above-described patent 3 differs from the present invention proposed below in the configuration of the detection sensor for detecting collapse as well as in the detection method, and there is also a technical difference in the detection data transmitted to the server and the alarm method.

Korean Registered Patent Publication No. 10-2039000 Korean Patent Publication No. 10-1244304 Korean Registered Patent Publication No. 10-0920803

The present invention has been devised in consideration of and improving the above conventional problems, and a displacement gauge is installed on the retaining wall on a slope, and displacement or behavior is generated in the retaining wall due to external factors. The purpose of this is to provide a system for detecting the collapse of a retaining wall joint and an alarm system so that an administrator or user can quickly recognize it by sending such risk detection and measurement data to the server.

The present invention combines the principle of an electromagnet to immediately detect when it collapses due to displacement or behavior on the side of the retaining wall and sound an alarm to generate an alarm, and transmits such risk detection and measurement data to the server, but utilizes wireless communication and realizes low power consumption. Its purpose is to provide a system for detecting and alarming the collapse of the joints of the retaining walls on the slopes.

An object of the present invention is to provide a collapsing detection and warning system of a slope retaining wall joint so as to quickly and accurately detect the collapse of the joint side of a slope retaining wall and to alert a dangerous situation.

The collapsing detection and warning system of the retaining wall joint on the slope to achieve the above object is installed on the retaining wall installed on the slope to detect and generate an alarm when the retaining wall collapses due to earth pressure or field environmental factors. In the detection and alarm system, it is installed on the joint of the retaining wall on the slope, and is installed to form an electromagnet circuit adjacent to each other and maintain the state of the electromagnet through it, and is provided so that the state of the electromagnet is released when the joint side of the slope retaining wall collapses. A collapse detection sensor unit; It checks the state of the electromagnet on the side of the collapse detection sensor in real time, and generates an alarm to notify the dangerous situation by recognizing the release signal of the electromagnet on the side of the collapse detection sensor unit, which occurs when the joint side of the slope retaining wall collapses. A controller unit that transmits to the unit; And a server unit that wirelessly receives data on the collapse of the retaining wall transmitted from the controller unit, stores it, and displays it so that an administrator or a user can recognize it.

Here, the collapse detection sensor unit, an electromagnet core installed on a retaining wall on a slope and connected to receive power from the controller unit, and generating a magnetic field by supplying current; Armature installed on the slope retaining wall, disposed adjacent to and facing each other with the electromagnet core based on the joint on the retaining wall side, and provided to form an electromagnet circuit to maintain the state of the electromagnet when a magnetic field is generated from the electromagnet core; including, the slope retaining wall It can be configured so that the state of the electromagnet is released by the separation from the setting position between the electromagnet core and the armature when the joint side of is collapsed.

Here, the controller unit recognizes in real time the maintenance signal or the release signal of the electromagnet state generated by the collapse detection sensor unit, but controls the occurrence of an alarm to notify a dangerous situation when the joint of the slope retaining wall collapses, and at the same time, the retaining wall collapse situation. MCU for controlling the transmission of the server unit side; A buzzer for generating an alarm when the state of the electromagnet is released in the collapse detection sensor unit due to the collapse of the joint side of the slope retaining wall; A communication module for transmitting data on the collapse of the retaining wall to the server unit through wireless communication when the state of the electromagnet is released by the collapse detection sensor unit due to the collapse of the joint side of the slope retaining wall; The collapse detection sensor unit, as well as a battery for supplying operation power required for the MCU, the buzzer, and the communication module; can have a configuration including.

Here, the collapse detection sensor unit further comprises a three-axis sensor (X, Y, Z) or a gyro sensor installed on the slope retaining wall, the data generated from the three-axis sensor (X, Y, Z) or gyro sensor It is configured to detect the collapse of the joint side of the slope retaining wall as well as predicting the risk of displacement and behavior on the slope retaining wall side, and the 3-axis sensor (X, Y, Z) or gyro sensor is based on LoRa for low power communication. It can be configured to transmit to either the controller unit or the server unit by mounting a data transmission module using a wireless communication method or a beacon-based wireless communication method that does not require a pairing connection and enables low-power communication.

Here, the communication module applies a LoRa-based wireless communication method for low-power communication or a beacon-based wireless communication method that does not require a pairing connection and enables low-power communication, and the communication module transmits data indicating the collapse of the retaining wall to the server. It can be configured to include a transmission band pass filter so as to remove an interference signal outside the transmission band to remove noise during transmission to the side.

Here, the electromagnet core can be used in a very stable manner and the efficiency of detecting the collapse of the joint side of the slope retaining wall can be improved because the magnetic field arrangement can be arbitrarily adjusted by the user and a uniform magnetic force can be obtained while generating a strong magnetic field. It can be configured with a multi-pole type electromagnet core.

According to the present invention, by installing a displacement gauge incorporating the principle of an electromagnet on a retaining wall on a slope, displacement or behavior is generated in the retaining wall due to external factors, and when it collapses, it recognizes the separation due to disconnection of the connection state between the sensors provided in the displacement gauge and quickly and accurately. Collapses can be detected and at the same time, an alarm is generated, and the risk of the retaining wall conditions including collapse is detected and the measurement data is transmitted to the server so that the manager or user can quickly detect the collapse of the joint side of the retaining wall and dangerous situations It can provide a system for detecting and alarming the collapse of the joints of the retaining walls on the slope to make them aware.

According to the present invention, through a new configuration incorporating the principle of an electromagnet, displacement or movement on the side of the retaining wall is generated, and when it collapses, it can be detected immediately and an alarm is sounded to generate an alarm, and such collapse and danger detection and measurement data are transmitted to the server unit. It is possible to implement low-power communication and provide a system for detecting the collapse of a retaining wall joint on a slope and an alarm system that can improve the transmission efficiency of detection data.

According to the present invention, when the joint side collapse of the slope retaining wall occurs, it can be quickly and accurately detected, and a dangerous situation can be immediately alerted to the site, and the collapse detection of the slope retaining wall joint that can increase the detection efficiency when the slope retaining wall joint collapses, and An alarm system can be provided.

1 is a block diagram illustrating a system for detecting and alarming a collapse of a joint of a retaining wall on a slope according to an exemplary embodiment of the present invention.
2 is a conceptual diagram illustrating the principle of the collapse detection in the collapse detection and alarm system of the slope retaining wall joint according to an embodiment of the present invention, (a) is a retaining wall joint by forming an electromagnet circuit between an electromagnet core and an armature It is a diagram showing the safety state of the negative side, and (b) is a diagram showing the collapse detection and alarm status of the retaining wall joint side by opening the electromagnet circuit between the electromagnet core and the armature.
3 is a schematic side view showing a state in which a collapse detection and warning system of a slope retaining wall joint according to an embodiment of the present invention is installed.
4 is a block diagram illustrating an additional configuration of a collapse detection sensor unit in the collapse detection and warning system of a slope retaining wall joint according to an embodiment of the present invention.

A preferred embodiment of the present invention will be described with reference to the drawings as follows, and it will be possible to better understand the objects and configurations of the present invention and features thereof through such detailed description and drawings.

Referring to Figures 1 to 4, the collapse detection and alarm system of a slope retaining wall joint according to an embodiment of the present invention will be described as follows.

The collapsing detection and warning system of the slope retaining wall joint according to the embodiment of the present invention is mounted on the retaining wall installed on the slope to more efficiently detect and generate an alarm when the retaining wall collapses due to earth pressure or field environmental factors. We propose a system to inform you.

Specifically, the collapse detection and warning system of the slope retaining wall joint according to an embodiment of the present invention includes a collapse detection sensor unit 100, a controller unit 200, and a server unit 300, as shown in Figs. It consists of a configuration that includes.

The collapse detection sensor unit 100 is installed on the joint of the retaining wall 1 on the slope, and as shown in Figs. 1 and 2, the electromagnet core 110 and the joint fixedly installed on one side of the retaining wall at the joint side It includes an armature 120 fixedly installed on the other side of the retaining wall.
The electromagnet core 110 and the armature 120 are disposed adjacent to each other in a non-contact structure to form an electromagnet circuit and are mounted to maintain the electromagnet state through this, and when the joint side of the slope retaining wall 1 collapses It is provided so that the electromagnet state is released by a short circuit of the electromagnet circuit formed between the electromagnet core 110 and the armature 120.

That is, the collapse detection sensor unit 100 forms an electromagnet circuit by grafting the electromagnet principle to maintain the electromagnet state, but the position of the electromagnet core 110 and the armature 120 when collapsing the joint side of the retaining wall 1 It is provided so that the electromagnet state is switched to open by separation and the electromagnet circuit is released, through which the collapse of the joint side of the slope retaining wall 1 can be easily detected.

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The electromagnet core 110 is installed at one side of the joint of the slope retaining wall 1, is connected to receive power from the controller 200, and is provided to generate a magnetic field by supplying current.

At this time, the electromagnet core 110 is manufactured in a form in which a coil is wound around a magnetic material such as ferrite, and the arrangement of magnetic fields such as polarity can be arbitrarily adjusted by the user, and a strong magnetic field can be generated while obtaining a uniform magnetic force, so it is very stable. It can be said that it is more preferable to apply a multi-pole type electromagnet core so as to increase the efficiency of the use and detection of collapse on the joint side of the slope retaining wall (1).

For example, the electromagnet core 110 may be provided in various ways, such as having a 4-pole electromagnet core having a 4-pole arrangement such as NSNS or SNSN.

The armature 120 is installed on the other side of the joint of the retaining wall 1 on the slope, but is disposed adjacent to and facing each other with the electromagnet core 110 based on the joint on the retaining wall side, and when a magnetic field is generated from the electromagnet core 110, mutually electromagnets It is provided to form a circuit to maintain the electromagnet state.

At this time, the armature 120 is manufactured in a form in which a coil is wound around an iron core, and when a magnetic field is generated by supplying a current from the electromagnet core 110, the armature 120 is excited to form an electromagnet circuit with each other. It is used to make it possible.

Here, the collapse detection sensor unit 100 is installed adjacent to each other, the electromagnet core 110 and the armature 120, and forms an electromagnet circuit by means of a cut between each other, but the joint side collapse of the retaining wall 1 on the slope When the electromagnet core 110 and the armature 120 are provided to release the electromagnet state by separation from the setting position.

That is, the collapse detection sensor unit 100 is provided with an electromagnet core 110 and an armature 120 to combine the principle of an electromagnet, and an electromagnet circuit that maintains an electromagnet state when the joint side of the slope retaining wall 1 collapses. By opening it, the relay contact that kept the electromagnet state is short-circuited to become a non-contact state, and through this, the collapse of the joint side of the slope retaining wall 1 can be detected.

In addition, the collapse detection sensor unit 100 further includes a displacement sensor 130 such as a three-axis sensor (X, Y, Z) or a gyro sensor installed on the retaining wall on the slope, as shown in FIG. The joint of the slope retaining wall (1) while predicting the risk due to the displacement and behavior of the slope retaining wall (1) side through data generated from the shaft sensor (X, Y, Z) or displacement sensor 130 such as a gyro sensor. You can have additional configurations to detect side collapse.

To the displacement sensor 130 such as the 3-axis sensor (X, Y, Z) or gyro sensor, a LoRa-based wireless communication method is applied for low-power communication, or a beacon-based wireless communication method that does not require a pairing connection and enables low-power communication. It includes a configuration in which the applied data transmission module 131 is mounted, and may be configured to transmit data to either the controller unit 200 or the server unit 300.

Here, through the displacement sensor 130 such as the three-axis sensor (X, Y, Z) or gyro sensor, it is possible to quickly measure a change value for the displacement or behavior occurring in the slope retaining wall 1, Through monitoring and analysis of these measurements, the risk of cracking or collapse can be predicted.

Here, the three-axis sensors (X, Y, Z) can detect displacement and behavior in the X-axis, Y-axis, and Z-axis directions of the slope retaining wall (1), and the gyro sensor As a sensor that measures the overall orientation change of an object, such as measuring the angular velocity per hour or per second using the property of maintaining the direction, it can detect the displacement and behavior of the slope retaining wall (1) side.

The controller unit 200 checks the state of the electromagnet by the formation of the electromagnet circuit on the side of the collapse detection sensor unit 100 in real time, but the collapse detection sensor unit 100 side that occurs when the joint side of the slope retaining wall 1 collapses. It is provided to quickly recognize an electromagnet state release signal, generate an alarm to notify such a dangerous situation, and transmit a collapse situation on the retaining wall 1 side to the server unit 300 at the same time.

The controller unit 200 may have a configuration including an MCU 210, a buzzer 220, a communication module 230, and a battery 240.

The MCU 210 recognizes the maintenance signal or the release signal of the electromagnet state generated from the collapse detection sensor unit 100 in real time, but controls the generation of an alarm to notify a dangerous situation when the joint of the slope retaining wall 1 collapses. At the same time, the retaining wall 1 is provided to control the transmission of the server unit 300 side in a collapse situation.

When the MCU 210 is provided by adding a displacement sensor 130 such as a 3-axis sensor (X, Y, Z) or a gyro sensor to the collapse detection sensor unit 100, the slope retaining wall 1 is initially installed. It is possible to have a function of predicting the risk of cracks or collapse at the joint side of the retaining wall (1) by loading the state recorded data and comparing and analyzing the displacement data detected through the displacement sensor (130), sometimes displacement sensor The displacement data sensed through 130 may be transmitted to the server unit 300 to be monitored.

The buzzer 220 is provided to generate an alarm by sounding an alarm when the state of the electromagnet is released from the collapse detection sensor unit 100 due to the collapse of the joint side of the slope retaining wall 1.

The buzzer 220 detects the state of the electromagnet through the electromagnet core 110 and the armature 120 and sounds an alarm when the joint side of the slope retaining wall 1 collapses to generate an alarm, and the displacement sensor 130 Even when the risk of collapsing at the joint side of the slope retaining wall 1 is predicted based on the displacement data sensed through, an alarm may be sounded to generate an alarm.

The communication module 230 transmits detection data on the collapse of the retaining wall 1 through wireless communication when the electromagnet state is released from the collapse detection sensor unit 100 due to the collapse of the joint side of the slope retaining wall 1 300).

It is preferable that the communication module 230 employs a LoRa-based wireless communication method to implement low-power communication or a beacon-based wireless communication method that does not require a pairing connection and enables low-power communication.

In this case, the communication module 230 may apply an LTE wireless communication method or a Wi-Fi wireless communication method.

Here, the communication module 230 includes a transmission band pass filter to remove interference signals outside the transmission band to remove noise when transmitting sensing data indicating the collapse of the slope retaining wall 1 to the server unit 300. You can have a containing configuration.

The battery 240 is provided to supply necessary operating power to each of the components, including the MCU 210, the buzzer 200, and the communication module 230, as well as the collapse detection sensor unit 100.

The server unit 300 is configured to wirelessly receive and store the sensing data on the collapse of the joint side of the retaining wall 1 transmitted from the controller unit 200, as well as display it so that an administrator or a user can recognize it.

The server unit 300 serves as a monitoring means for monitoring whether the slope retaining wall 1 collapses on the joint side, and may be referred to as a central control unit.

The server unit 300 functions to collect and store displacement or behavior-related data or sensing data for the slope retaining wall 1, and is provided to implement big data processing.

That is, the server unit 300 can be used to predict and prevent dangerous situations such as the collapse of the slope retaining wall 1 through big data processing.

In addition, when the server unit 300 receives the displacement data detected through the displacement sensor 130 from the MCU 210 of the controller unit 200, it is monitored through a process of comparing and analyzing it with the initial installation state. By doing so, it is possible to have a function of predicting the risk of cracking or collapse at the joint side of the slope retaining wall 1, and through this, when the server unit 300 predicts the collapse risk, the controller unit 200 uses the MCU 210 It can be equipped to alert a dangerous situation by sending a signal to trigger an alarm to generate an alarm.

Furthermore, in the present invention, the function of selectively generating an alarm when the above-described collapse or dangerous situation is detected may be selectively executed, but all of them may be executed.

Accordingly, through the collapse detection and warning system of the slope retaining wall joint according to the present invention having the configuration as described above, the electromagnet core 110 and the corresponding armature 120 are provided on the joint of the slope retaining wall 1 By installing the collapse detection sensor unit 100 that includes, displacement or behavior occurs in the retaining wall 1 due to external factors, and when it collapses, it quickly detects it and generates an alarm immediately at the site. By transmitting the joint side collapse detection data from the controller unit 200 to the server unit 300, the administrator or user can quickly recognize the collapse of the joint side of the slope retaining wall and the danger situation, and the joint part of the retaining wall 1 It can provide an advantage that can increase the detection efficiency and accuracy for side collapse.

The above description is for illustrative purposes of the present invention, and the embodiments published in the specification are not intended to limit the technical idea of the present invention, but to explain the present invention. Various modifications, modifications, or substitution of steps will be possible without departing from the technical idea of Therefore, the scope of protection of the present invention is interpreted by the matters described in the claims, and technical matters within the scope equivalent thereto are to be construed as being included in the scope of the present invention.

100: collapse detection sensor unit 110: electromagnet core
120: amateur 200: controller unit
210: MCU 220: buzzer
230: communication module 240: battery
300: server unit

Claims (6)

In the collapsing detection and warning system of the retaining wall joints on the slope to detect and generate an alarm when the retaining wall collapses due to earth pressure or field environmental factors by mounting on the joint between retaining walls installed on the slope,
It is installed on the joint of the retaining wall on the slope, and is disposed in close proximity to each other in a non-contact structure to form an electromagnet circuit and is mounted to maintain the state of the electromagnet through this, and provided to release the state of the electromagnet when the joint side of the retaining wall collapses on the slope. A collapse detection sensor unit; The state of the electromagnet on the side of the collapse detection sensor unit is checked in real time, and an alarm is generated to notify the dangerous situation by recognizing the release signal of the electromagnet state on the side of the collapse detection sensor unit, which is generated when the joint side of the slope retaining wall collapses. A controller unit for transmitting to the server unit; A server unit that wirelessly receives data on the collapse of the retaining wall transmitted from the controller unit, stores it, and displays it so that an administrator or user can recognize it; Including,
The collapse detection sensor unit,
An electromagnet core installed at one side of the joint of the slope retaining wall, connected to receive power from the controller unit, and generating a magnetic field by supplying current, and manufactured in a form in which a coil is wound around a magnetic material; It is located on the other side of the joint of the retaining wall on the slope and is arranged to be adjacent to the electromagnet core relative to the joint on the retaining wall, and when a magnetic field is generated from the electromagnet core, an electromagnet circuit is formed between each other to maintain the state of the electromagnet. As provided, the armature manufactured in the form of winding a coil around the iron core; including, but is configured to release the electromagnet state by separation from the setting position between the electromagnet core and the armature when the joint side of the slope retaining wall collapses,
The collapse detection sensor unit,
Further comprising a three-axis sensor (X, Y, Z) or a gyro sensor installed on the slope retaining wall,
It is configured to detect the collapse of the joint side of the retaining wall on the slope while predicting the risk due to the displacement and behavior of the slope retaining wall through the data generated from the three-axis sensor (X, Y, Z) or the gyro sensor,
The 3-axis sensor (X, Y, Z) or gyro sensor does not require a pairing connection and is configured to transmit to either the controller unit or the server unit by mounting a data transmission module applying a beacon-based wireless communication method capable of low-power communication. Collapse detection and alarm system of the joints of the retaining walls on the slopes.
delete ◈ Claim 3 was abandoned upon payment of the set registration fee.◈ The method of claim 1,
The controller unit,
It recognizes in real time the maintenance signal or release signal of the electromagnet state generated from the collapse detection sensor unit, but controls the alarm to notify the danger situation when the joint of the slope retaining wall collapses, and at the same time controls the transmission to the server side of the collapse of the retaining wall. MCU to do;
A buzzer for generating an alarm when the state of the electromagnet is released in the collapse detection sensor unit due to the collapse of the joint side of the slope retaining wall;
A communication module for transmitting data on the collapse of the retaining wall to the server unit through wireless communication when the state of the electromagnet is released from the collapse detection sensor unit due to the collapse of the joint side of the slope retaining wall;
A battery for supplying operation power required for the MCU, the buzzer and the communication module as well as the collapse detection sensor unit; Including,
The communication module applies a beacon-based wireless communication method that does not require a pairing connection and enables low-power communication,
The communication module includes a transmission band pass filter to remove interference signals outside the transmission band for noise removal when transmitting data indicating the collapse of the retaining wall to the server unit. delete delete delete

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