A coal mine fully mechanized coal face rib support plate state detection method

Abstract

The application discloses a kind of coal mine fully mechanized face guard board state detection method, belong to infrared imaging processing field;Specifically: in every two hydraulic support of coal mine fully mechanized face, install an infrared camera, according to the length of fully mechanized face, install N infrared cameras in total, field of view covers all fully mechanized face;Then, increase marker in the middle of the guard board of each hydraulic support, and the marker material is different from the emissivity of guard board material and coal seam.Then, the infrared image data of guard board containing marker and not containing marker is collected, and the corresponding label is made, and the label information is packed and saved in the infrared camera memory.Finally, during the working process, the working state of the drum and the guard board is monitored and detected in real time through the infrared camera: the application detects whether the marker exists by increasing the marker, further confirms whether the guard board is retracted, improves the accuracy of the system and reduces the risk of safety accidents.

Description

Technical Field

[0001] This invention belongs to the field of infrared imaging processing, specifically a method for detecting the condition of the sidewalls of a fully mechanized coal mining face. Background Technology

[0002] Infrared thermal imaging has advantages such as strong penetration and high clarity at night. It can not only penetrate smoke, but also image in environments with poor visibility or low light. It has been widely used in security, perimeter, military and border and coastal defense fields.

[0003] Currently, coal mine safety, intelligent coal mining, and digital coal mining are receiving significant attention and development. Due to the inherent advantages of infrared imaging systems, they have been widely promoted and applied in intelligent coal mining scenarios.

[0004] In the solution for panoramic stitching and presentation of coal mine fully mechanized mining faces, many companies and research institutions have proposed intelligent solutions. These solutions can not only present the scene of coal cutting machines mining in real time, but also reduce the time coal miners spend working underground and improve the safety of coal mine data collection. However, they also raise other safety issues.

[0005] For example, during the movement of a coal cutter, due to smoke, obstructed vision, or other reasons, the worker may not notice in time that the side guard plate has not been retracted, causing the coal cutter to cut the side guard plate. This not only makes the side guard plate and the coal cutter prone to damage, but may even lead to serious accidents such as roof collapse. Summary of the Invention

[0006] This invention addresses the problem of dangerous accidents caused by the untimely retraction of side guards in fully mechanized coal mining faces within intelligent systems. It proposes a method for detecting the status of side guards in fully mechanized coal mining faces, thereby improving the safety of coal cutters during operation.

[0007] The specific steps of the method for detecting the condition of the sidewalls of a fully mechanized coal mining face are as follows:

[0008] Step 1: Install one infrared camera on every two hydraulic supports of the fully mechanized mining face. Install a total of N infrared cameras according to the length of the fully mechanized mining face to cover the entire fully mechanized mining face.

[0009] Step 2: Add markers in the middle of each side panel. The marker material has a different emissivity than the side panel material and the coal seam.

[0010] Step 3: Collect infrared image data of the protective panels containing and without markers, and after labeling them accordingly, package and save the label information into the infrared camera's memory.

[0011] The image detects a roller label (G), a side guard plate label (H), and a marker label (B), and calculates the average grayscale value within the ranges of G, H, and B in real time. And the distance GH between label G on the coal cutter drum and label H on the side guard plate. L The distance GB between label G on the coal cutter drum and label B on the marker. L ;

[0012] Step 4: During operation, the working status of the rollers and side guards is monitored and detected in real time using an infrared camera.

[0013] When tags H and B are detected simultaneously, it indicates that the side panel has not been raised. Calculate the distance GH. L Is it greater than the threshold GH? Y and grayscale mean Is it within the grayscale value range H of the side panel? R Inside. When GH L >GH Y At the same time In H R Within the range, the coal cutter continues to operate, when GH L <GH Y ,at the same time In H R When the coal is within the specified range, the coal cutter stops working and the condition of the side guards is checked.

[0014] When only label H is detected, it indicates that the side guard plate has not been lifted. Therefore, GH should be checked. L Is it greater than the threshold GH? Y ,as well as Is it in H? R Within the range. When GH L >GH Y At the same time In H R Within the range, the coal cutter continues to operate, when GH L <GH Y ,at the same time In H R When the coal is within the specified range, the coal cutter stops working and the condition of the side guards is checked.

[0015] When only label B is detected, it indicates that the side guard plate has not been raised, and the distance to GB is determined. L Is it greater than the threshold GB? Y and grayscale mean Is it within the grayscale value range B of the marker? R Inside, when GB L GB Y At the same time In B R Within the specified range, the coal cutter continues to operate, when GB L <GB Y At the same time In BR Within the specified range, the coal cutter stops working, and the condition of the side guards is checked.

[0016] The advantages of this invention are:

[0017] 1) A method for detecting the condition of the side guard plate in a fully mechanized coal mining face, which is applicable to coal mining scenarios where smoke and dust are likely to occur. The infrared camera can penetrate smoke and dust to obtain a clearer image than visible light, and can also distinguish rollers, side guard plates and markers in grayscale values, making it easier to judge the working status of rollers and side guard plates.

[0018] 2) A method for detecting the condition of the side guard plate in a fully mechanized coal mining face. By adding markers and detecting their presence, the method can further confirm whether the side guard plate has been retracted, thereby improving the accuracy of the system and reducing the risk of safety accidents. Attached Figure Description

[0019] Figure 1 This is a flowchart of a method for detecting the condition of the sidewall panel in a fully mechanized coal mining face according to the present invention;

[0020] Figure 2 This is a schematic diagram of the camera arrangement scheme in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the marking and affixing in an embodiment of the present invention;

[0022] Figure 4 This is a flowchart illustrating the specific process of detecting the working status of the side guard plate in an embodiment of the present invention; Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail and clearly with reference to the accompanying drawings.

[0024] This invention relates to a method for detecting the status of the sidewalls in fully mechanized coal mining faces. Based on the radiation characteristics of an infrared imaging system, it detects the opening and closing status of the sidewalls. By continuously monitoring whether the sidewalls are raised, the method determines whether the coal cutter should continue moving, thereby reducing the occurrence of accidents. This invention combines the advantages of infrared imaging, not only providing real-time visualization of the coal cutter's working status during its operation and the movement of coal miners, but also detecting the real-time status of the sidewalls, effectively improving safety in underground mining operations. Furthermore, it can be further extended to other high-risk work scenarios, such as chemical plants and power plants, to improve worker safety.

[0025] like Figure 1 As shown, the specific steps are as follows:

[0026] Step 1: Install one infrared camera on every two hydraulic supports of the fully mechanized mining face. Install a total of N infrared cameras according to the length of the fully mechanized mining face to cover the entire fully mechanized mining face.

[0027] The infrared camera has explosion-proof and explosion-proof functions, AI target detection function, temperature measurement function, real-time grayscale value analysis function, and real-time uploading of danger signal alarm function.

[0028] Step 2: Add markers in the middle of each side panel. The marker material has a different emissivity than the side panel material and the coal seam.

[0029] The markers must not interfere with the normal operation of the side protection plate, the markers must be clearly distinguishable from the side protection plate, and the marker materials must have different emissivity than the side protection plate materials and the coal seam.

[0030] Step 3: Collect infrared image data of the protective panels containing and without markers, and after labeling them accordingly, package and save the label information into the infrared camera's memory.

[0031] The image detects a coal cutter drum label as G, a side guard plate label as H, and a marker label as B, and calculates the average grayscale value within the ranges of G, H, and B in real time. And the distance GH between label G on the coal cutter drum and label H on the side guard plate. L The distance GB between label G on the coal cutter drum and label B on the marker. L ;

[0032] The grayscale range of the side panel is H. R The grayscale value range of the marker is B. R The gray value range of coal mines is M. R The grayscale value range of the roller is G. R The acquired tag information is packaged and saved into the infrared camera's memory, and can be accessed in real time during camera operation.

[0033] Step 4: During the mining operation of the fully mechanized coal face, the working status of the drum and side guard plates is monitored and detected in real time using infrared cameras.

[0034] When tags H and B are detected simultaneously, it indicates that the side panel has not been raised. Calculate the distance GH. L Is it greater than the threshold GH? Y and grayscale mean Is it within the grayscale value range H of the side panel? R Inside. When GH L >GH Y At the same time In H R Within the range, the coal cutter continues to operate, when GH L <GH Y ,at the same time In H R When the coal is within the specified range, the coal cutter stops working and the condition of the side guards is checked.

[0035] When only label H is detected, it indicates that the side guard plate has not been lifted. Therefore, GH should be checked. L Is it greater than the threshold GH? Y ,as well as Is it in H? R Within the range. When GH L >GH Y At the same time In H R Within the range, the coal cutter continues to operate, when GH L <GH Y ,at the same time In H R When the coal is within the specified range, the coal cutter stops working and the condition of the side guards is checked.

[0036] When only label B is detected, it indicates that the side guard plate has not been raised, and the distance to GB is determined. L Is it greater than the threshold GB? Y and grayscale mean Is it within the grayscale value range B of the marker? R Inside, when GB L GB Y At the same time In B R Within the specified range, the coal cutter continues to operate, when GB L <GB Y At the same time In B R Within the specified range, the coal cutter stops working, and the condition of the side guards is checked.

[0037] Example:

[0038] Infrared thermal imaging cameras were selected with resolutions of 256*192, 384*288, and 640*512. According to... Figure 2 As shown, N infrared cameras are installed on the hydraulic support, according to the length of the longwall mining face, to cover the entire longwall mining face.

[0039] Select easily identifiable and detectable markers. The emissivity of the marker material should be different from that of the coal feeder, human body, side guard plate, and coal seam. The marker size is 30*30cm, and can be randomly adjusted according to the size of the side guard plate.

[0040] like Figure 3 As shown, the marker is attached to the middle of the side guard plate. The camera can see the marker when the side guard plate is raised, but not when it is lowered. When there is a lot of dust at the longwall face, making it difficult for the camera to detect the marker, a heating device can be added to the marker to ensure it can be detected.

[0041] like Figure 4 As shown, the side panel condition detection process is as follows:

[0042] When a camera detects roller G, it means the coal cutter has entered the camera's field of view. Determine if the side guard plate H and marker B are detected within the field of view of the camera with the roller. If both side guard plate H and marker B are detected simultaneously, it means the side guard plate is not raised, and only information about the side guard plate is needed. Calculate the distance GH between side guard plate H and roller. L When GH L >GH Y When the distance between the drum and the side guard plate is safe, the coal cutter can continue moving forward. When GH... L <GH Y This indicates that the roller and the side guard plate are too close, and the side guard plate has not retracted in time. In this case, the coal cutter needs to stop advancing and the working status of the side guard plate needs to be checked. To improve the accuracy of the detection, the average gray value of the side guard plate can be further analyzed. Is it in H? R Within the range. When In H R Within the range, the detected side panel H can be identified as a side panel.

[0043] If only the side guard plate H is detected, it indicates that the side guard plate has not been raised, and only the information of the side guard plate is needed. Calculate the distance GH between the side guard plate H and the roller. L When GH L When >GHY, it indicates that the distance between the drum and the side guard plate is safe, and the coal cutter can continue to move forward. When GH L <GH Y This indicates that the roller and the side guard plate are too close, and the side guard plate has not retracted in time. In this case, the coal cutter needs to stop advancing and the working status of the side guard plate needs to be checked. To improve the accuracy of the detection, the average gray value of the side guard plate can be further analyzed. Is it in H? R Within the range. When In H R Within the range, the detected side panel H can be identified as a side panel.

[0044] When only marker B is detected, it indicates that the side guard plate has not been raised. Calculate the distance GB between the marker and the roller. L Determine GB L Is it greater than the threshold GB? Y When GB L GB Y When the distance between the drum and the side guard plate is safe, the coal cutter can continue to operate. (This is in accordance with GB standards.) L <GB YIf this occurs, it indicates that the coal cutter and the side guard plate are too close, posing a safety hazard. The coal cutter should be stopped, and the condition of the side guard plate should be checked.

[0045] To improve the detection accuracy of markers and reduce false alarms, the average grayscale value of the markers is calculated. judge Whether it is within the grayscale value range of the marker, when In B R Within the specified range, it can be determined that the detected marker is a correct marker.

Claims

1. A method for detecting the condition of the sidewalls of a fully mechanized coal mining face, characterized in that, The specific steps are as follows: Step 1: Install one infrared camera on every two hydraulic supports of the fully mechanized mining face. Based on the length of the fully mechanized mining face, install a total of N infrared cameras to cover the entire fully mechanized mining face. Step 2: Add a marker in the middle of the side guard plate of each hydraulic support. The marker material has a different emissivity than the side guard plate material and the coal seam. The marker is affixed to the middle of the side panel; the camera can see the marker when the side panel is not raised, and cannot see the marker when the side panel is retracted. Step 3: Collect infrared image data of the protective panels containing and without markers, and after labeling them accordingly, package and save the label information into the infrared camera's memory; The image detects a roller label (G), a side guard plate label (H), and a marker label (B), and calculates the average grayscale value within the ranges of G, H, and B in real time. , , And the distance between label G on the coal cutter drum and label H on the side guard plate. The distance between label G on the coal cutter drum and label B on the marker. ; Step 4: During operation, the working status of the rollers and side guards is monitored and detected in real time using an infrared camera. When both tags H and B are detected simultaneously, it indicates that the side panel has not been raised. The distance is then calculated. Is it greater than the threshold? and grayscale mean Is it within the grayscale value range of the side panel? within; when At the same time exist Within the range, the coal cutter continues to operate, when ,at the same time exist When the area is within range, the coal cutter stops working and the condition of the side guard plate is checked; When only label H is detected, it indicates that the side guard plate has not been lifted. Is it greater than the threshold? ,as well as Is it in Within the range; when At the same time exist Within the range, the coal cutter continues to operate, when ,at the same time exist When the area is within range, the coal cutter stops working and the condition of the side guard plate is checked; When only label B is detected, it indicates that the side guard plate has not been raised, and the distance is then determined. Is it greater than the threshold? and grayscale mean Is it within the grayscale range of the marker? inside, when At the same time exist Within the range, the coal cutter continues to operate, when At the same time exist Within the specified range, the coal cutter stops working, and the condition of the side guards is checked.

2. The method for detecting the condition of the sidewalls of a fully mechanized coal mining face as described in claim 1, characterized in that, The infrared camera has explosion-proof and explosion-proof functions, AI target detection function, temperature measurement function, real-time grayscale value analysis function, and real-time uploading of danger signal alarm function.

3. The method for detecting the condition of the sidewalls of a fully mechanized coal mining face as described in claim 1, characterized in that, Add a heating device to the marker.

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