A deep chamber deformation monitoring and alarming system and method

Abstract

The application belongs to the technical field of mine safety, and specifically discloses a deep chamber deformation monitoring and alarming system and method, which comprises an infrared light emitting module, a position indicating module, an optical module, a position logic unit, an alarming module and a computer control terminal, the infrared light emitting module is used for emitting infrared light to irradiate the position indicating module, the position indicating module reflects the infrared light to the optical module for marking the current position, the optical module and the position logic unit are used for logically judging and processing the received position information and then transmitting the position information to the alarming module and the computer control terminal, the alarming module is used for alarming in the chamber, and the computer control terminal is used for recording signals, monitoring displacement changes and controlling end alarms. The deep chamber deformation monitoring and alarming system and method can continuously monitor the deformation and water inrush of the deep chamber, immediately issue an alarm if an abnormality is found, and thus the safety of underground operation is enhanced, and the system and method are suitable for popularization in the field of deep engineering such as underground mining.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine safety, in particular to a deep chamber deformation monitoring and alarming system and method. BACKGROUND

[0002] With the rising demand for global mineral resources, mining is gradually developing to deeper levels. In this process, due to the challenges of high pressure, high temperature and high osmotic pressure and other geological conditions, the chambers and support structures of the mine are at risk of deformation and destruction, which can lead to serious safety accidents such as collapse, sidewall shedding and water inrush, etc. Therefore, it is crucial to effectively monitor the deformation and water inrush of deep mines and issue timely warnings to ensure the safe operation of mines.

[0003] Currently, the safety monitoring and warning system of deep mines relies on the collection of underground data and is realized through the establishment of a safety monitoring and warning model or cloud computing. Although this method has achieved certain results, since the analysis and decision-making process needs to be completed in the cloud or server side rather than directly in the mine, there is a certain delay in the process from data collection to cloud processing and then to feedback to the monitoring and warning inside the mine, which fails to achieve complete real-time monitoring.

[0004] In addition, although the sensors underground are very sensitive, the complex environment of deep mines often makes the collected data noisy. Although the noise can be improved to some extent through noise reduction algorithms, in the complex environment of deep mines, noise beyond the processing capacity of the algorithm can still interfere with the data and even lead to incorrect decisions, which seriously affects the accuracy of monitoring and warning. SUMMARY

[0005] The purpose of the present application is to provide a deep chamber deformation monitoring and alarming system and method, which solves the problems of insufficient precision and low data processing efficiency in the prior art when monitoring the deformation and water inrush of deep mines.

[0006] To achieve the above-mentioned purpose, the present application provides a deep chamber deformation monitoring and alarming system, which comprises an infrared light emitting module, a position indicating module, an optical module, a position logic unit, an alarm module and a computer control terminal. The infrared light emitting module is used to emit infrared light to irradiate the position indicating module, and the position indicating module reflects the infrared light to the optical module to mark the current position.

[0007] The optical module and the position logic unit are used to logically judge and process the received position information and then transmit it to the alarm module and the computer control terminal. The alarm module is used for alarming inside the chamber, and the computer control terminal is used for recording signals, monitoring displacement changes and controlling the alarm.

[0008] Preferably, the infrared light emitting module comprises an infrared light emitter, the infrared light emitter irradiates the position indicating module by emitting infrared light, the position indicating module comprises a position indicator, the position indicator is used for reflecting the infrared light, the optical module comprises a camera and an image processing chip, the camera is used for shooting an image with the position indicator, and the image processing chip is used for extracting position information of the image.

[0009] Preferably, the position logic unit comprises a displacement judgment chip and a communication chip, the displacement judgment chip is used for comparing and judging displacement of the position information acquired in front and back, and the communication chip is used for transmitting the processed signal to the alarm module and the computer terminal.

[0010] Preferably, the position indicator comprises a bowl-shaped structure with an infrared reflection coating on an upper portion and a bolt connected to the bowl-shaped structure at a lower portion, the bowl-shaped structure is used for reflecting the infrared light in different directions and increasing visibility of the position indicator in the camera.

[0011] Preferably, the camera is connected with the image processing chip, the displacement judgment chip and the communication chip in sequence, and then connected with the alarm module and the computer control terminal, and the alarm module comprises an audible and visual alarm connected with the communication chip.

[0012] Preferably, the displacement judgment chip, the image processing chip, the communication chip, the computer control terminal and the audible and visual alarm are connected through optical fibers or wires.

[0013] A monitoring and alarming method of a deep chamber deformation monitoring and alarming system, comprising the following steps:

[0014] Step S1, selecting a surface to be monitored in the deep chamber, determining the installation position of the deep chamber deformation monitoring and alarming system, and connecting the modules after being fixed reasonably;

[0015] Step S2, measuring an included angle between a position indicator-camera connecting line and a horizontal plane as θ, a width of a bowl-shaped structure on the upper portion of the position indicator as W, and a focal length of the camera as F;

[0016] Step S3, the infrared light emitter in the infrared light emitting module emits infrared light to irradiate on the position indicator, the position indicator reflects the infrared light to the camera, the camera shoots an image with the position indicator, and the image processing chip converts the position of the position indicator in the image into plane coordinate information;

[0017] Step S4, the displacement judgment chip converts the position information in front and back into a relative displacement amount, and sends the relative displacement amount to the communication chip after logical judgment processing;

[0018] Step S5, the communication chip sends the received relative displacement to the computer control terminal for recording, monitoring and early warning, and sends the electric signal to the alarm module for alarm in the chamber.

[0019] Preferably, in step S4, the specific process of logical judgment is as follows: the displacement judgment chip converts the received position signal into a relative displacement, which represents the relative moving distance from the last reference point; the displacement judgment chip judges whether the relative displacement exceeds the pre-set safety range, i.e. the maximum allowable displacement; if the relative displacement does not exceed the range, the displacement judgment chip sends the value of the relative displacement to the communication chip through the communication interface.

[0020] Preferably, judging whether the relative displacement exceeds the pre-set maximum allowable displacement comprises the following steps:

[0021] S41, the image of the position indicator reflecting the infrared light is captured by the camera, the center point of the position indicator is used to determine the initial point A0(X0, Y0) of signal recording, and the maximum allowable displacement D and D* at the initial point are set, wherein D is the maximum allowable displacement parallel to the detection surface, and D* is the maximum allowable displacement perpendicular to the detection surface;

[0022] S42, if the surface of the monitoring surface deforms, the position of the position indicator reflecting the infrared light changes, and a new recording point A1(X1, Y1) is generated in the captured image, wherein:

[0023] The horizontal displacement D in the image is: 1x :

[0024] D 1x = X1-X0;

[0025] That is:

[0026] D nx = X n -X (n-1) ;

[0027] The vertical displacement D in the image is: 1y :

[0028]

[0029] That is:

[0030]

[0031] A relative displacement D1 is generated, wherein:

[0032]

[0033] If the monitoring surface continues to deform, a new record point A2(X2, Y2) is generated, and a relative displacement D2 is generated, wherein:

[0034]

[0035] That is:

[0036]

[0037] ∑D n = D1+ D2+ …+ Dn n ;

[0038] At the same time, the pixel width P1 of the position indicator in the image is measured, which is used to calculate the displacement perpendicular to the detection surface direction:

[0039]

[0040] That is:

[0041]

[0042] ∑D * n = D1+ D2+ …+ Dn * ; * * n ;

[0043] If the monitoring surface continues to deform, new record points A n , relative displacements D n , and D* n are continuously generated, and all record points A n , relative displacements D n , and D* n are sent to the computer control terminal;

[0044] S43, the deep chamber deformation monitoring alarm system compares D and Dn, D* and D* n , and ∑D n and ∑D* n :

[0045] If D>D n and D*>D* n , continue to record;

[0046] If D<D n or D*<D* n , the system alarms;

[0047] If D>∑D n or D*>∑D* n , the system alarms;

[0048] ​If the signal is lost, a new record point A∞(∞,∞) is generated, and the system alarms.

[0049] Preferably, in step S5, the communication chip receives the relative displacement data from the displacement judgment chip and forwards the relative displacement data to the computer control terminal, when the computer control terminal receives the relative displacement data, it determines whether the relative displacement exceeds the preset safety threshold, if it exceeds, the computer control terminal triggers an alarm, the communication chip sends an electrical signal to the sound and light alarm to activate the sound and light alarm, and the sound and light alarm performs sound and light alarm in the chamber after receiving the electrical signal.

[0050] Therefore, the deep chamber deformation monitoring and alarming system and method have the following beneficial effects:

[0051] The displacement monitoring precision is controlled within 7mm, and the whole process from monitoring deformation to alarming does not exceed 0.5s; in addition, the technical device is compact in design, easy to install and deploy in the deep chamber, and supports comprehensive and continuous monitoring of the chamber; this technical breakthrough effectively solves the challenges of traditional monitoring technology in the face of deep chambers, such as low monitoring precision, slow data processing speed, and difficulty in realizing full coverage monitoring of the chamber due to the large size of the equipment.

[0052] The technical solutions of the present application will be further described in detail below with the help of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 is the overall structure block diagram of an embodiment of the deep chamber deformation and water inrush monitoring and alarming system of the present application;

[0054] Figure 2 is a side view of an infrared light emitting module of an embodiment of the deep chamber deformation monitoring and alarming system of the present application;

[0055] Figure 3 is a schematic diagram of a position indication module of an embodiment of the deep chamber deformation monitoring and alarming system of the present application;

[0056] Figure 4 is a schematic diagram of an optical module of an embodiment of the deep chamber deformation monitoring and alarming system of the present application;

[0057] Figure 5 is a schematic diagram of a position logic unit of an embodiment of the deep chamber deformation monitoring and alarming system of the present application;

[0058] Figure 6 is a schematic diagram of an alarm module of an embodiment of the deep chamber deformation monitoring and alarming system of the present application;

[0059] Figure 7is a roadway installation schematic diagram of a monitoring and alarming method embodiment of a deep chamber deformation monitoring and alarming system of the present application;

[0060] Figure 8 is a principle schematic diagram of measuring displacement amount perpendicular to a detection surface of a monitoring and alarming method embodiment of a deep chamber deformation monitoring and alarming system of the present application.

[0061] Reference numerals

[0062] 1, infrared light emitting module; 11, infrared light emitter;

[0063] 2, position indicating module; 21, position indicator;

[0064] 3, optical module; 31, camera; 32, image processing chip;

[0065] 4, position logic unit; 41, displacement determination chip; 42, communication chip;

[0066] 5, alarm module; 51, audible and visual alarm;

[0067] 6, computer control terminal. DETAILED DESCRIPTION

[0068] The technical solutions of the present application are further described below through the drawings and embodiments.

[0069] Unless otherwise defined, technical or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms "first", "second", and similar terms are used herein to distinguish one element from another, and are not necessarily used in a sequence or to denote importance or quantity. The terms "comprise", "comprising", "include", "including", and the like are used herein to mean including but not limited to. The terms "connected", "coupled", and the like are not limited to direct or physical connections or couplings, but can include indirect or wireless connections or couplings. The terms "upper", "lower", "left", "right", and the like are used herein only to indicate relative positions, and can change accordingly when the absolute positions of the described objects change.

[0070] As Figure 1As shown in the figure, a deep chamber deformation monitoring and alarming system includes an infrared light emitting module 1, a position indicating module 2, an optical module 3, a position logic unit 4, an alarm module 5 and a computer control terminal 6. The optical module 3 and the position logic unit 4 are connected to the computer control terminal 6. The connection between the optical module 3 and the position logic unit 4 is not unique, and the operator can freely adjust the connection mode according to the site conditions. The alarm module 5 is connected to the position logic unit 4, and the computer control terminal 6 is connected to the position logic unit 4.

[0071] The infrared light emitting module 1 is used to emit infrared light to irradiate the position indicating module 2. The relative positions of the infrared light emitting module 1 and the position indicating module 2 are not unique, and the operator can freely adjust the positions according to the site conditions. The position indicating module 2 reflects the infrared light to the optical module 3 to indicate the current position. The optical module 3 and the position logic unit 4 are used to logically judge and process the received position information and transmit it to the alarm module 5 and the computer control terminal 6. The alarm module 5 is used for alarming in the chamber, and the computer control terminal 6 is used for recording signals, monitoring displacement changes and controlling terminal alarms. The connection mode of the optical module 3, the position logic unit 4 and the computer control terminal 6 is not unique, and the operator can freely adjust the connection mode according to the site conditions.

[0072] Specifically, as shown in the figure, Figure 2 The infrared light emitting module 1 includes an infrared light emitter 11, which emits infrared light to irradiate the position indicating module 2, as shown in the figure, Figure 3 The position indicating module 2 includes a position indicator 21, which is used to reflect infrared light. Its installation mode and position are not unique, and the operator can freely adjust the installation position and angle according to the site conditions.

[0073] As shown in the figure, Figure 4 The optical module 3 includes a camera 31 and an image processing chip 32. The camera 31 is used to take images with the position indicator 21, and the image processing chip 32 is used to extract the position information of the image. The position indicator 21 includes a bowl-shaped structure with an infrared reflective coating on the upper part and a bolt connected to the bowl-shaped structure on the lower part. The bowl-shaped structure is used to reflect infrared light in different directions and increase the visibility of the position indicator 21 in the camera 31. The size, shape and angle of the bowl-shaped structure on the upper part of the position indicator 21 are not unique, and the operator can freely set them according to the site conditions.

[0074] As shown in the figure, Figure 5 The position logic unit 4 includes a displacement judgment chip 41 and a communication chip 42. The displacement judgment chip 41 is used to compare and judge the displacement of the position information obtained before and after. The communication chip 42 is used to transmit the processed signals to the alarm module 5 and the computer terminal 6.

[0075] Specifically, the camera 31 is connected with the image processing chip 32, the displacement judgment chip 41 and the communication chip 42 in turn, and then connected with the alarm module 5 and the computer control terminal 6, as shown in Figure 6 The alarm module 5 includes an audible and light alarm 51 connected with the communication chip 42. The displacement judgment chip 41 and the image processing chip 32, the communication chip 42 and the displacement judgment chip 41, the communication chip 42 and the computer control terminal 6, and the audible and light alarm 51 and the communication chip 42 are connected through optical fibers or wires which can transmit signals quickly.

[0076] In actual use, the staff fixes the position indicating module 2 on the surface of the chamber to be detected, uses the infrared light emitting module 1 to irradiate the position indicating module 2, uses the position change of the position indicating module 2 photographed by the optical module 3 to judge whether the surface is deformed and damaged and whether it has the risk of water inrush, and judges whether to trigger the alarm according to the set maximum allowable displacement.

[0077] A monitoring and alarming method of a deep chamber deformation monitoring and alarming system, comprising the following steps:

[0078] Step S1, as shown in the drawings, select the surface to be monitored in the deep chamber, determine the installation position of the deep chamber deformation monitoring and alarming system, and connect the modules after being fixed reasonably; Figure 7

[0079] Step S2, the angle between the position indicator 21 and the horizontal line connected with the camera 31 is θ, the width of the bowl-shaped structure on the upper part of the position indicator 21 is W, and the focal length of the camera 31 is F;

[0080] Step S3, the infrared light emitter 11 in the infrared light emitting module 1 emits infrared light to irradiate on the position indicator 21, the position indicator 21 reflects the infrared light to the camera 31, the camera 31 photographs the image with the position of the position indicator 21, and the image processing chip 32 converts the position of the position indicator 21 in the image into plane coordinate information; as shown in the long dotted line in Figure 7 is the reflection path of the infrared light.

[0081] Step S4, the displacement judgment chip 41 converts the front and rear position information into relative displacement, and sends it to the communication chip 42 after logical judgment and processing of the relative displacement;

[0082] ​The specific process of logical judgment processing is: the displacement judgment chip 41 converts the received position signal into a value representing the moving distance, which is the relative displacement amount, indicating the relative moving distance from the last reference point; then, the displacement judgment chip 41 judges whether the relative displacement amount exceeds the pre-set safety range, i.e. the maximum allowed displacement amount, if the relative displacement amount does not exceed this range, the displacement judgment chip 41 sends the value of the relative displacement amount to the communication chip 42 through the communication interface.

[0083] Judging whether the relative displacement amount exceeds the pre-set maximum allowed displacement amount includes the following steps:

[0084] S41, as shown in the figure, the image of the position indicator 21 reflecting the infrared light is shot by the camera 31, the initial point A0(X0, Y0) of signal recording is determined by the center point of the position indicator 21, and the maximum allowed displacement amount D and D* at the initial point are set, wherein D is the maximum allowed displacement amount parallel to the detection surface, and D* is the maximum allowed displacement amount perpendicular to the detection surface; Figure 8

[0085] S42, if the surface of the monitoring surface deforms, the position of the position indicator 21 reflecting the infrared light changes, and a new recording point A1(X1, Y1) is generated in the shot image, wherein:

[0086] The horizontal displacement amount D in the image is: 1x :

[0087] D 1x = X1-X0;

[0088] That is:

[0089] D nx = X n -X (n-1) ;

[0090] The vertical displacement amount D in the image is: 1y :

[0091]

[0092] That is:

[0093]

[0094] The relative displacement D1 is generated, wherein:

[0095]

[0096] If the monitoring surface continues to deform, a new recording point A2(X2, Y2) is generated, and the relative displacement D2 is generated, wherein:

[0097] ​

[0098] Right now:

[0099]

[0100] ∑D n =D1+D2+…+D n ;

[0101] Simultaneously, the pixel width P1 of the position indicator 21 in the image is measured and used to calculate the displacement perpendicular to the detection surface:

[0102]

[0103] Right now:

[0104]

[0105] ∑D * n =D * 1+D * 2+…+D * n ;

[0106] If the monitored surface continues to deform, new recording points A will continue to be generated. n Relative displacement D n and D* n Record all points A n and relative displacement D n and D* n It was sent to computer control terminal 6.

[0107] S43. Comparison of Deformation Monitoring and Alarm Systems in Deep Tunnels: D and Dn, D* and D* n and ∑D n and ∑D* n :

[0108] If D>D n , D*>D* n Continue recording;

[0109] If D <D n or D* <D* n System alarm;

[0110] If D>∑D n Or D*>∑D* n System alarm;

[0111] If the signal is lost, a new record point A∞(∞,∞) is generated, and the system alarms.

[0112] In step S5, the communication chip 42 sends the received relative displacement to the computer control terminal 6 for recording, monitoring and early warning, and sends an electrical signal to the alarm module 5 to trigger an alarm in the tunnel.

[0113] The communication chip 42 receives the relative displacement data from the displacement judgment chip 41 and forwards the relative displacement data to the computer control terminal 6. When the computer control terminal 6 receives the relative displacement data, it determines whether the relative displacement exceeds the preset safety threshold. If it does, the computer control terminal 6 is triggered to alarm. The communication chip 42 sends an electrical signal to the audible and visual alarm 51 to activate the audible and visual alarm 51. After receiving the electrical signal, the audible and visual alarm 51 performs an audible and visual alarm in the chamber.

[0114] Therefore, the present invention, employing the aforementioned deep chamber deformation monitoring and alarm system and method, successfully achieves displacement monitoring accuracy within 7 mm, and the entire process from monitoring to deformation occurrence to alarm issuance does not exceed 0.5 seconds. Furthermore, the device's compact design facilitates installation and deployment within mine chambers, supporting comprehensive and continuous monitoring of the chamber. This technological breakthrough effectively solves the challenges encountered by traditional monitoring technologies in deep mines, such as low monitoring accuracy, slow data processing speed, and the difficulty in achieving full chamber coverage monitoring due to the large size of the equipment.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A monitoring and alarming method of a deep chamber deformation monitoring and alarming system, characterized in that, The utility model provides a kind of deep chamber deformation monitoring alarm system, including infrared light emitting module, position indicating module, optical module, position logic unit, alarm module and computer control terminal, infrared light emitting module is used to emit infrared light to irradiate position indicating module, position indicating module reflects infrared light to optical module for indicating current position; Optical module and position logic unit are used to transmit to alarm module and computer control terminal after the received position information is judged, processed logically, alarm module is used for alarm in chamber, and computer control terminal is used to record signal, monitor displacement change and control terminal alarm; Infrared light emitting module includes infrared light emitter, and infrared light emitter irradiates position indicating module by emitting infrared light, and position indicating module includes position indicator, and position indicator is used to reflect infrared light, and optical module includes camera and image processing chip, and camera is used to shoot the image with position indicator, and image processing chip is used to extract the position information of image; Position logic unit includes displacement judging chip and communication chip, and displacement judging chip is used to compare and judge displacement to the position information obtained before and after, and communication chip is used to transmit the signal processed to alarm module and computer terminal; It comprises the following steps: Step S1, select the surface to be monitored in the deep chamber, determine the installation position of the deep chamber deformation monitoring alarm system, and connect each module after being reasonably fixed; Step S2, the angle between the position indicator and the camera connecting line and the horizontal plane is θ, the width of the bowl-shaped structure on the upper part of the position indicator is W, and the focal length of the camera is F; Step S3, the infrared light emitter in the infrared light emitting module emits infrared light to irradiate on the position indicator, the position indicator reflects the infrared light to the camera, the camera shoots the image with the position of the position indicator, and the position of the position indicator in the image is converted into plane coordinate information through the image processing chip; Step S4, the displacement judging chip converts the position information before and after into relative displacement, and sends the relative displacement to the communication chip after logical judgment and processing; Step S5, the communication chip sends the received relative displacement to the computer control terminal for recording, monitoring and early warning, and sends the electrical signal to the alarm module for alarm in the chamber; In step S4, the logical judgment and processing are performed by judging whether the relative displacement exceeds the maximum allowable displacement set in advance, which comprises the following steps: S41, an image of the position indicator reflecting the infrared light is captured by the camera, the initial point A0(X0, Y0) of the signal recording is determined by the center point of the position indicator, and the maximum allowed displacement amount D at the initial point is set where D is the maximum allowed displacement amount parallel to the detection surface, is the maximum allowed displacement amount perpendicular to the detection surface; S42, if the surface of the monitoring surface deforms, the position of the position indicator reflecting the infrared light changes, a new recording point A1 is generated in the image taken , ), wherein: Horizontal direction displacement amount D in image 1x : D 1x = X1- X0; That is: D nx =X n -X (n-1) ; Image vertical direction displacement amount D 1y : ； That is: ； Generating relative displacement wherein: ； If the monitoring surface continues to deform, a new recording point A2 , is generated, resulting in a relative displacement D2, wherein: ； That is: ； ； Simultaneously measuring the pixel width of a position indicator in an image P 1. For calculating the displacement perpendicular to the direction of the detection surface: ； That is: ； ； If the monitoring surface continues to deform, new recording points A are continuously generated n , the relative displacement D n and D n , all recording points A n and the relative displacement D n and D n are transmitted to the computer control terminal.

2. The monitoring and alarming method of a deep chamber deformation monitoring and alarming system according to claim 1, characterized in that: The position indicator includes a bowl-shaped structure with an infrared reflective coating on the upper part and a bolt connected to the bowl-shaped structure at the lower part, and the bowl-shaped structure is used to reflect infrared light in different directions and increase the visibility of the position indicator in the camera.

3. The monitoring and alarming method of a deep chamber deformation monitoring and alarming system according to claim 2, characterized in that: The camera is connected with the image processing chip, the displacement judging chip and the communication chip in sequence, and then connected with the alarm module and the computer control terminal, and the alarm module includes an audible and visual alarm connected with the communication chip.

4. The monitoring and alarming method of a deep chamber deformation monitoring and alarming system according to claim 3, characterized in that: The displacement judging chip, the image processing chip, the communication chip, the computer control terminal and the audible and visual alarm are connected through optical fibers or wires.

5. The monitoring and alarming method of a deep chamber deformation monitoring and alarming system according to claim 4, characterized in that, S42 also includes S43, deep chamber deformation monitoring alarm system compares D and D n 、 and n and ∑D n and ∑ n : If D > D n and n Continue recording;​ If D < D n or n System alarm;​ if D > ∑D n or >∑ n System alarm; If signal is lost, new record point is generated System alarm.

6. The monitoring and alarming method of a deep chamber deformation monitoring and alarming system according to claim 5, characterized in that, In step S5, the communication chip receives the relative displacement data from the displacement judging chip and forwards the relative displacement data to the computer control terminal. When the computer control terminal receives the relative displacement data, it determines whether the relative displacement exceeds the preset safety threshold. If it does, the computer control terminal triggers an alarm. The communication chip sends an electrical signal to the audible and visual alarm to activate it. After receiving the electrical signal, the audible and visual alarm performs audible and visual alarm in the chamber.

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