Real-time pressure monitoring and stress luminescence early warning device for contact surface of top plate and bottom plate of coal mine

Abstract

The utility model provides a coal mine roof and bottom plate contact surface pressure real-time monitoring and stress luminescence early warning device, which belongs to the technical field of safety monitoring and comprises a processor module, an optical acquisition module is arranged above the processor module, an optical fiber is arranged on the outer side of the optical acquisition module, one end of the optical fiber is provided with an optical fiber probe, and the other end of the optical fiber probe is provided with a stress sensor. The optical acquisition module is optically connected with the optical fiber probe through an optical fiber, a display module and an early warning module are further arranged above the processor module, the processor module is electrically connected with the display module and the early warning module, and the processor module is electrically connected with the optical acquisition module. According to the utility model, a novel passive and low-cost pressure monitoring scheme is realized, the scheme is quick in response, high in precision and convenient to install, and can give an early warning in real time, so that the pressure monitoring and early warning efficiency of underground environments such as a coal mine and the like is effectively improved, the mine safety is enhanced, and the accident risk is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of safety monitoring technology, and in particular to a real-time monitoring and stress luminescence early warning device for the contact surface between the roof and floor of a coal mine. Background Technology

[0002] In coal mining operations, pressure monitoring at the contact surface between the coal seam floor and roof is a crucial step in preventing safety accidents such as roof collapse and floor water inrush. Currently, the industry mainly relies on mechanical pressure sensors, electrical sensors, and fiber optic sensing technologies to achieve this goal. However, these technologies all have varying degrees of drawbacks. While mechanical pressure sensors have a simple structure, their mechanical components are prone to wear and fatigue under the complex environment of underground coal mines—humid, high-temperature, dusty, and vibrating conditions—leading to decreased sensitivity, poor durability, and the inability to achieve real-time monitoring. Electrical sensors, such as strain gauges and piezoelectric sensors, can convert pressure changes into electrical signals for monitoring, but the strong electromagnetic interference in underground coal mines easily causes signal distortion, and they are susceptible to corrosion under high humidity and dust conditions, affecting their service life and reliability. Although fiber optic sensing technology has strong resistance to electromagnetic interference, its high material cost due to the need for precision optical components, its demanding installation environment, its difficult deployment, and its high maintenance costs limit its large-scale application in underground coal mines.

[0003] Therefore, existing technical solutions for pressure monitoring in coal mines generally face challenges such as strong power dependence, complex deployment, poor monitoring accuracy and real-time performance, and susceptibility to external environmental influences. There is an urgent need to develop a more efficient, reliable, and economical pressure monitoring and early warning technology. Utility Model Content

[0004] The purpose of this invention is to provide a real-time pressure monitoring and stress luminescence early warning device for the contact surface between the roof and floor of a coal mine. This invention realizes a new passive and low-cost pressure monitoring solution. This solution has a rapid response, high accuracy, convenient installation, and real-time early warning capability, effectively improving the pressure monitoring and early warning efficiency of underground environments such as coal mines, enhancing mine safety, and significantly reducing the risk of accidents.

[0005] To achieve the above objectives, this utility model provides a real-time monitoring and stress luminescence early warning device for the contact surface pressure between the roof and floor of a coal mine, including a processor module. An optical acquisition module is disposed above the processor module, and an optical fiber is disposed outside the optical acquisition module. An optical fiber probe is disposed at one end of the optical fiber. The optical acquisition module and the optical fiber probe are optically connected through the optical fiber. A display module and an early warning module are also disposed above the processor module. The processor module is electrically connected to the display module and the early warning module, respectively, and the processor module is electrically connected to the optical acquisition module.

[0006] Preferably, the processor module includes a processor unit, and the processor unit is provided with a mounting base around its perimeter. The processor unit and the mounting base are an integral structure, and a circular hole is provided on the top of the mounting base.

[0007] Preferably, the warning module includes LEDs and a buzzer, with at least three LEDs of different colors.

[0008] Preferably, the display module includes a display, which is electrically connected to the processor unit.

[0009] Preferably, the optical acquisition module includes an optical sensor, which is a silicon photodiode.

[0010] Therefore, the technical effects of this utility model using the above-mentioned real-time monitoring and stress luminescence early warning device for the contact surface pressure between the coal mine roof and floor are as follows:

[0011] 1. Achieve efficient pressure monitoring: By directly coating or embedding a stress-luminescent material layer on the coal seam contact surface, the changes in the light signal generated under pressure can accurately reflect the pressure dynamics between the coal seam floor and roof.

[0012] 2. High response speed and high precision measurement: The luminescence intensity of the stress-luminescent material layer is directly related to the pressure it is subjected to. Combined with the processor unit, the light signal can be accurately converted into a pressure value, realizing high-precision measurement of pressure changes.

[0013] 3. Simplified installation process and reduced costs: It does not rely on complex sensor arrays or external power supply devices. The design is simple and easy to install. The deployment of stress luminescent material layers can be completed through simple coating or embedding technology, which reduces system costs and daily maintenance difficulty.

[0014] 4. Real-time early warning function: When the pressure on the coal seam contact surface exceeds the preset safety threshold, the system can immediately trigger the early warning mechanism and issue an alarm to the mine workers through various means (such as sound, flashing lights, etc.). Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a flowchart illustrating the internal connection relationships of the device in the embodiment.

[0017] Figure Labels

[0018] 1. Mounting base; 2. Display; 3. LED; 4. Buzzer; 5. Processor unit; 6. Optical sensor; 7. Fiber optic cable; 8. Fiber optic probe; 9. Round hole. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0021] Example 1

[0022] like Figure 1 As shown, this utility model provides a real-time monitoring and stress-luminescent early warning device for the contact surface pressure between the roof and floor of a coal mine. The core of this device is the processor module, which is responsible for processing data from various modules and making corresponding responses. An optical acquisition module is installed above the processor module. This module is connected to an optical fiber probe 8 via an outer optical fiber 7. The optical fiber probe 8 monitors the stress-luminescent material that has been coated or embedded in the groove of the contact surface. When the contact surface is subjected to pressure changes, the material undergoes a slight lattice change under external pressure, resulting in a change in the intensity of the light signal. The silicon photodiode in the optical acquisition module can capture these rays and convert them into electrical signals, which are then transmitted to the processor module.

[0023] Silicon photodiodes consume very little power when capturing light signals, allowing them to operate continuously with a small power supply, thus enabling real-time monitoring of the luminescence intensity of the stress-emitting material layer. The light signal from the stress-emitting material layer is converted into an electrical signal, the intensity of which is proportional to the luminescence intensity of the stress-emitting material. Changes in the electrical signal reflect pressure changes at the contact surface.

[0024] Upon receiving these signals, the processor module performs real-time analysis and processing to determine the pressure status of the contact surface between the top and bottom plates. Simultaneously, the processor module is electrically connected to the display module and the warning module. The display module includes a monitor 2 that displays the current pressure data and stress illumination status in real time, providing operators with a clear understanding.

[0025] The early warning module includes LED3 and a buzzer4. LED3 is equipped with three different colors: red, yellow, and green, each representing a different warning level. When the pressure data exceeds the preset safe range, LED3 will light up in the corresponding color, and buzzer4 will sound an alarm to remind operators to take timely action. Red represents the high-pressure area, and green represents the normal pressure area. Furthermore, different warning methods are used based on the changes and distribution of pressure values: when the pressure value is within the normal range, green LED3 lights up; when the pressure value is close to the safe threshold, yellow LED3 lights up; when the pressure value exceeds the safe threshold, red LED3 lights up, and buzzer4 sounds an alarm to warn operators to stay away from the area.

[0026] The processor unit 5 is surrounded by mounting bases 1, and the processor unit 5 and mounting base 1 are an integral structure. The mounting base 1 has a circular hole 9 on its top. When it is necessary to detect the pressure of the coal mine contact surface, the mounting base 1 is installed on the wall of the contact surface. There are two circular holes 9 on each of the four corners of the mounting base 1, for a total of 8 holes, which facilitates the operator to better install and fix the entire device.

[0027] The fiber optic probe 8 monitors the stress-emitting material coated or embedded in the grooves of the contact surface. If a light signal is generated, it is transmitted to the optical sensor 6 via fiber optic cable 7. This effectively avoids interference from dust in the coal mine environment on the light signal and the optical sensor 6 over a long period. The optical sensor 6 converts the light signal into an electrical signal, which then activates the processor unit 5. The processor unit 5 receives the electrical signal from the optical sensor 6, amplifies, processes, and analyzes the signal, converting the light signal into useful pressure information. A visual data display presents the complex, real-time monitoring data graphically on the screen, helping operators quickly and intuitively understand the pressure distribution on the coal mine contact surface and make adjustments or interventions in advance. Color coding is used based on the pressure level. Furthermore, different warning methods are used based on pressure changes and distribution: a green LED 3 illuminates when the pressure is within the normal range, a yellow LED 3 illuminates when the pressure is close to the safety threshold, a red LED 3 illuminates when the pressure exceeds the safety threshold, and a buzzer 4 sounds to warn workers to stay away from the area. When the device is no longer needed, the operator can remove the mounting base 1 from the wall. Considering the depth of the mine, the stress analysis of the contact surface between the mine roof and floor can be performed in advance to find the areas that are prone to accidents such as rock bursts, and then the device can be installed and the stress luminescent material can be coated.

[0028] Therefore, this utility model adopts the above-mentioned real-time pressure monitoring and stress luminescence early warning device for the contact surface between the roof and floor of a coal mine, realizing a new passive and low-cost pressure monitoring solution. This solution has a rapid response, high accuracy, convenient installation, and can provide real-time early warning, effectively improving the pressure monitoring and early warning efficiency of underground environments such as coal mines, enhancing mine safety, and significantly reducing the risk of accidents.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model 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 solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A real-time monitoring and stress luminescent early warning device for the contact surface pressure between the roof and floor of a coal mine, characterized in that, The device includes a processor module, an optical acquisition module located above the processor module, an optical fiber located outside the optical acquisition module, a fiber optic probe located at one end of the optical fiber, and the optical acquisition module and the fiber optic probe being optically connected via the optical fiber. A display module and an early warning module are also located above the processor module, and the processor module is electrically connected to the display module and the early warning module, respectively, and is also electrically connected to the optical acquisition module.

2. The real-time monitoring and stress luminescence early warning device for the contact surface pressure between the coal mine roof and floor as described in claim 1, characterized in that, The processor module includes a processor unit, and a mounting base is provided around the processor unit. The processor unit and the mounting base are an integral structure, and a circular hole is provided on the top of the mounting base.

3. The real-time monitoring and stress luminescence early warning device for the contact surface pressure between the coal mine roof and floor as described in claim 1, characterized in that, The warning module includes LEDs and a buzzer, with at least three LEDs, each of which is a different color.

4. The real-time monitoring and stress luminescence early warning device for the contact surface pressure between the coal mine roof and floor as described in claim 1, characterized in that, The display module includes a display, which is electrically connected to the processor unit.

5. The real-time monitoring and stress luminescence early warning device for the contact surface pressure between the coal mine roof and floor as described in claim 1, characterized in that, The optical acquisition module includes an optical sensor, which is a silicon photodiode.

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