A fully mechanized coal mining face cable monitoring system and method

Abstract

The present application relates to thin seam fully mechanized working face technical field, disclose a kind of fully mechanized working face cable monitoring system and method, including video subsystem, network transmission subsystem, position detection subsystem and analysis processing subsystem;The video subsystem includes several cameras;The position detection subsystem is used to confirm the position of coal winning machine and real-time transmission is passed to analysis processing subsystem with the position signal of coal winning machine;The analysis processing subsystem is used to receive the monitoring picture of video subsystem according to monitoring strategy and display;The monitoring strategy is real-time fixed acquisition and display the monitoring picture of fixed camera, and according to the real-time position of coal winning machine, judge the working face area where coal winning machine is located, dynamically acquisition and display the monitoring picture of the camera corresponding to the cable clamp bending place in the working face area where coal winning machine is located.The present application can carry out real-time, accurate fully mechanized working face cable monitoring, help to solve cable off groove problem in time, and system setting is simple, and operation method is simple.

Description

Technical Field

[0001] This invention relates to the field of fully mechanized mining face technology for thin coal seams, and specifically to a cable monitoring system and method for fully mechanized mining faces. Background Technology

[0002] The power cable of the coal mining machine is its power source. In modern mechanized longwall mining faces, the power cable and water supply pipeline of the coal mining machine are installed in special cable clamps on the machine. These clamps are placed in the cable trough of the conveyor and moved by the machine. During operation, the cable needs to move back and forth within the cable trough of the scraper conveyor as the machine travels. Due to the complex working conditions, when the coal mining machine repeatedly changes direction, especially during oblique cutting and cutting triangular coal at the head and tail, the cable clamps are prone to stacking in multiple layers. The cable clamps can fold back and forth 3 to 5 layers, or even more, within the cable trough. Furthermore, due to the limitations of the scraper conveyor's mechanical structure, the cable trough height cannot be designed very high. When the stacked height of the cable clamps exceeds the trough height, cable clamps will detach from the trough. The detached cable clamps will fall onto the conveyor due to their own weight. This leads to frequent cable detachment during normal production, and this situation is particularly severe in thin coal seam working faces.

[0003] When cables come out of their grooves at the working face, it will cause the working face to stop production, affecting normal production and seriously impacting production safety and efficiency. Therefore, it is usually necessary to arrange special cable inspectors to inspect the cables and manually monitor and adjust the coal mining machine cables. This increases the number of personnel at the working face and also increases the workload of inspection, resulting in a large waste of manpower and resources. Other methods involve setting up a cable dragging system, where a cable-dragging trolley moves in the direction of the coal mining machine to drag the cable, ensuring that there are at most two layers of cable in the cable trench at the working face. While this solves the problem of cable stacking in the cable trench and effectively prevents cable detachment, reducing cable inspection costs, the entire cable dragging system is quite complex. While solving the cable detachment problem, it also increases the inspection and maintenance work of the chains, trolleys, drive units, and other components within the dragging system, resulting in an overall increase in workload. Furthermore, because the entire dragging system requires a drive motor, trolley, and rails, its structure is quite complex, and many thin coal seam working faces cannot provide enough installation space, making this method unsuitable for thin coal seam working faces. Summary of the Invention

[0004] The present invention aims to provide a cable monitoring system and method for fully mechanized mining faces, which can perform real-time, accurate and dynamic monitoring of the cable condition of fully mechanized mining faces, help to solve the problem of cable detachment from the trench in a timely manner, and the system is simple to set up and easy to operate.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] Option 1:

[0007] A cable monitoring system for a fully mechanized mining face includes a video subsystem, a network transmission subsystem, a location detection subsystem, and an analysis and processing subsystem;

[0008] The video subsystem includes several cameras, which are arranged on a hydraulic support; and the camera in the video subsystem whose position is closest to the center of the working surface is defined as a fixed camera.

[0009] Both the video subsystem and the position detection subsystem establish a communication connection with the analysis and processing subsystem through the network transmission subsystem; the position detection subsystem is used to confirm the position of the coal mining machine and transmit the coal mining machine position signal to the analysis and processing subsystem in real time.

[0010] The analysis and processing subsystem is used to receive and display the monitoring images from the video subsystem according to the monitoring strategy. The monitoring strategy is to collect and display the monitoring images from fixed cameras in real time, and to determine the working face area where the coal mining machine is located based on the real-time position of the coal mining machine, and to dynamically collect and display the monitoring images from the cameras at the cable clamp bends corresponding to the working face area where the coal mining machine is located.

[0011] The working principle and advantages of this invention are as follows: Cameras mounted on hydraulic supports provide comprehensive monitoring of the fully mechanized mining face. Based on the working face area where the coal mining machine is located, the analysis and processing subsystem dynamically combines different monitoring images according to a specific monitoring strategy, achieving real-time and dynamic monitoring of the cable conditions at the fully mechanized mining face. The system's operation is achieved by accurately determining the actual operating conditions of the working face area where the coal mining machine is located, and is realized through the cooperation of the video subsystem, position detection subsystem, analysis and processing subsystem, and network transmission system. The system setup is simple. Furthermore, for fully mechanized mining faces, the monitoring equipment (video subsystem) can directly utilize the monitoring cameras originally installed on the hydraulic supports, eliminating the need for additional equipment. The cameras themselves have a simple structure and are easy to replace, eliminating the need for complex maintenance procedures. Compared to conventional manual monitoring solutions, this solution provides more comprehensive, timely, and accurate monitoring of cable conditions. Moreover, due to its simple setup and lack of space occupation on the working face, this solution is adaptable to coal mining faces, including thin coal seams, and has good applicability.

[0012] Notably, this solution employs a combination of fixed and dynamic monitoring screens. The fixed monitoring screen corresponds to the middle of the working face. To ensure the normal operation of the coal mining machine, the machine cable forms a "cable bend" in the middle of the working face. Due to the allowance, the cable needs to crawl through this bend when the coal mining machine passes through this location, which can easily lead to cable derailment. Therefore, this area is considered a representative area prone to cable derailment, and this solution uses fixed image acquisition and display for this location. The monitoring is targeted and effective, accurately monitoring key faults. Furthermore, the dynamic monitoring screen changes in real time as the coal mining machine moves, focusing on the cable clamp bend behind the machine, which changes with the machine's position. This allows for accurate and timely monitoring of moving objects caused by the machine's movement. Overall, the monitoring effect is better. Compared to the conventional approach of displaying all monitoring screens in a fixed manner, this solution provides more effective and visually appealing monitoring, eliminating the need for staff to sift through numerous screens and facilitating timely confirmation of cable derailment status.

[0013] Furthermore, the network transmission subsystem includes a switch; the switch is used to connect the working face network and the mine ring network; the video subsystem, the position detection subsystem, and the analysis and processing subsystem establish a communication connection through the switch.

[0014] Beneficial effects: Using a switch for communication transmission between the video subsystem, the position detection subsystem, and the analysis and processing subsystem can achieve high transmission efficiency and a high level of data transmission security.

[0015] Furthermore, the number of hydraulic supports set on the working surface is N, and the hydraulic supports are numbered sequentially from 1 to N, starting from the triangular coal area at the machine head; the fixed camera is the camera in the video subsystem closest to the N / 2 hydraulic support.

[0016] Beneficial effects: The number of brackets further accurately defines the position of the fixed camera, ensuring that the selected fixed camera's field of view can accurately cover the cable bend in the middle of the work surface, making the monitoring of cable bends reliable.

[0017] Furthermore, the position detection subsystem includes a signal transmitting device and a signal receiving device that establish a communication connection with each other; the signal transmitting device is installed on the coal mining machine, and the signal receiving device is installed on each hydraulic support.

[0018] The signal transmitting device is used to transmit the position signal of the coal mining machine to the signal receiving device; the signal receiving device is used to receive the position signal of the coal mining machine and transmit the hydraulic support label corresponding to the position signal of the coal mining machine to the analysis and processing subsystem.

[0019] Beneficial effects: The position detection subsystem has a simple structure. The signal receiving device transmits the hydraulic support markings, which effectively confirm the position of the coal mining machine. This helps the analysis and processing subsystem to quickly select the monitoring screen to be displayed. Compared to directly analyzing the coordinates of the coal mining machine to confirm its position, this solution uses markings for confirmation, making data analysis easier and position confirmation more efficient.

[0020] Furthermore, when determining the working face area where the coal mining machine is located, the position detection subsystem is used to make the determination according to the area determination strategy.

[0021] The region determination strategy includes: determining whether the coal mining machine is in the head triangular coal area, the middle coal cutting area, or the tail triangular coal area based on the information transmitted by the position detection subsystem; and when the coal mining machine position signal is in the middle coal cutting area, comparing the hydraulic support number information at adjacent times, and determining the coal mining machine running direction based on the change of the hydraulic support number value.

[0022] Beneficial effect: When determining the area, the direction of operation of the coal mining machine is also determined simultaneously, which helps to ensure the accuracy of subsequent monitoring video calls.

[0023] Furthermore, when dynamically acquiring and displaying the monitoring images of the cameras at the cable clamp bends corresponding to the working face area where the coal mining machine is located, the acquisition is performed according to a preset acquisition strategy. The preset acquisition strategy includes: when the coal mining machine is located in the head triangle coal area, acquiring the monitoring images of all cameras covering the head triangle coal area; when the coal mining machine is located in the tail triangle coal area, acquiring the monitoring images of all cameras covering the tail triangle coal area.

[0024] Beneficial effects: When the coal mining machine is located in a triangular coal area, the camera monitoring images covering the entire triangular coal area are collected. Since the triangular coal area is located at both ends of the fully mechanized mining face, the cables in the triangular coal area are more prone to detaching from the chute than the cables in the middle coal cutting area. For such triangular coal areas that are prone to failure, this solution adopts comprehensive monitoring, which can achieve better monitoring results.

[0025] Furthermore, the preset acquisition strategy also includes: when the coal mining machine walks out of the triangular coal area at the head and enters the middle coal cutting area, and the real-time position of the coal mining machine is Z, acquiring the monitoring images from the cameras on the left and right sides of the Z / 2th hydraulic support; when the coal mining machine walks out of the triangular coal area at the tail and enters the middle coal cutting area, and the real-time position of the coal mining machine is Z, acquiring the monitoring images from the cameras on the left and right sides of the (N-Z2+Z)th hydraulic support.

[0026] Beneficial effects: For the central coal cutting area, which accounts for a larger proportion of the working face, this solution adopts a follow-up monitoring strategy. The monitoring images collected dynamically change with the position of the coal mining machine. Based on the real-time position of the coal mining machine, the solution selects the images from the camera corresponding to the real-time position of the cable clamp bend behind the coal mining machine. Since the position of the cable clamp bend behind the coal mining machine, which is prone to cable abnormalities, changes in real time as the coal mining machine moves, this solution makes it easier to capture cable abnormalities by following and collecting images from the cable clamp bend behind the coal mining machine, and the monitoring is more targeted.

[0027] Furthermore, when the analysis and processing subsystem displays the monitoring screen, it combines the monitoring screens from the camera at the cable clamp bend corresponding to the working face area where the coal mining machine is located with the monitoring screens from the fixed camera into a multi-grid display.

[0028] Beneficial effects: The monitoring screen displayed by the analysis and processing subsystem is neatly arranged, making it easy to view and providing a better visual experience.

[0029] Furthermore, the analysis and processing subsystem is also equipped with a cable anomaly early warning module; the cable anomaly early warning module is used to intelligently identify the cable operation status based on the monitoring screen; and to issue an early warning when it is identified that the cable has detached from the channel.

[0030] Beneficial effects: The cable anomaly early warning module can provide timely warnings of cable anomalies, making it easier for staff to detect abnormalities and arrange maintenance in a timely manner.

[0031] Option 2:

[0032] A method for monitoring cables in a fully mechanized mining face, using a fully mechanized mining face cable monitoring system as described in Scheme 1, includes the following steps: A video subsystem monitors the fully mechanized mining face in real time and transmits the monitoring images to an analysis and processing subsystem via a network transmission system; a position detection subsystem confirms the position of the coal mining machine and transmits the coal mining machine position signal to the analysis and processing subsystem in real time; the analysis and processing subsystem receives and displays the monitoring images from the video subsystem according to a monitoring strategy; the monitoring strategy involves real-time fixed acquisition and display of monitoring images from fixed cameras, and based on the real-time position of the coal mining machine, determining the working face area where the coal mining machine is located, and dynamically acquiring and displaying monitoring images from cameras at cable clamp bends corresponding to the working face area where the coal mining machine is located.

[0033] The advantages and benefits of this solution are as follows: through the cooperation of the video subsystem, the position detection subsystem, and the analysis and processing subsystem, it is possible to monitor the cable condition of the fully mechanized mining face in real time, which helps to solve the problem of cable detachment from the trench in a timely manner. Moreover, the system is simple to set up and easy to operate. Attached Figure Description

[0034] Figure 1This is a schematic diagram of the system structure of a fully mechanized mining face cable monitoring system and method according to a first embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the working face area division and hydraulic support numbering in Embodiment 1 of the cable monitoring system and method for fully mechanized mining faces of the present invention;

[0036] Figure 3 This is a system structure block diagram of an embodiment of the cable monitoring system and method for fully mechanized mining faces of the present invention;

[0037] Figure 4 This is a schematic diagram of the monitoring strategy operation flow of a fully mechanized mining face cable monitoring system and method according to an embodiment of the present invention;

[0038] Figure 5 This is a monitoring image of the coal mining machine when it is located in the triangular coal area at the head of the machine, according to Embodiment 1 of the cable monitoring system and method for fully mechanized mining faces of the present invention.

[0039] Figure 6 This is a monitoring image of the coal mining machine when it is located in the triangular coal area at the tail of the machine, according to Embodiment 1 of the cable monitoring system and method for fully mechanized mining faces of the present invention.

[0040] Figure 7 This is the first type of monitoring screen shown in Embodiment 1 of the cable monitoring system and method for fully mechanized mining faces of the present invention when the coal mining machine is located in the middle coal cutting area;

[0041] Figure 8 This is the second type of monitoring screen when the coal mining machine is located in the middle coal cutting area, according to Embodiment 1 of the cable monitoring system and method for fully mechanized mining face of the present invention. Detailed Implementation

[0042] The following detailed explanation illustrates the specific implementation methods:

[0043] Example 1:

[0044] The basic implementation examples are as follows: Figure 1 and attached Figure 3 As shown: A cable monitoring system for a fully mechanized mining face includes a video subsystem, a network transmission subsystem, a location detection subsystem, and an analysis and processing subsystem.

[0045] The video subsystem includes several cameras, which are mounted on hydraulic supports. The camera positioned closest to the center of the working face is defined as the fixed camera. Specifically, the number of hydraulic supports on the working face is N, and the hydraulic supports are numbered sequentially from 1 to N, starting from the triangular coal seam area at the machine head. Specifically, the hydraulic support at the end of the triangular coal seam area at the machine head is defined as number 1. In this embodiment, the triangular coal seam area at the machine head is located on the left side of the working face, and the triangular coal seam area at the machine tail is located on the right side. The hydraulic support numbers increase gradually from left to right. The fixed camera is the camera in the video subsystem closest to the N / 2th hydraulic support.

[0046] Both the video subsystem and the position detection subsystem establish a communication connection with the analysis and processing subsystem through the network transmission subsystem; the position detection subsystem is used to confirm the position of the coal mining machine and transmit the coal mining machine position signal to the analysis and processing subsystem in real time.

[0047] The analysis and processing subsystem is used to receive and display the monitoring images from the video subsystem according to the monitoring strategy. In this embodiment, the analysis and processing subsystem includes a video server, a display, etc., wherein the video server processes the monitoring images and then displays them visually on the display.

[0048] As attached Figure 4 As shown, the monitoring strategy involves real-time fixed acquisition and display of monitoring images from fixed cameras, and based on the real-time position of the coal mining machine, determining the working face area where the coal mining machine is located, and dynamically acquiring and displaying monitoring images from cameras at cable clamp bends corresponding to the working face area where the coal mining machine is located.

[0049] Specifically, the network transmission subsystem includes a switch; the switch is used to connect the working face network and the mine ring network; the video subsystem and the position detection subsystem establish a communication connection with the analysis and processing subsystem through the switch.

[0050] The position detection subsystem includes a signal transmitting device and a signal receiving device that establish communication connections with each other; the signal transmitting device is installed on the coal mining machine, and the signal receiving device is installed on each hydraulic support.

[0051] The signal transmitting device is used to transmit the position signal of the coal mining machine to the signal receiving device; the signal receiving device is used to receive the position signal of the coal mining machine and transmit the hydraulic support label corresponding to the position signal of the coal mining machine to the analysis and processing subsystem. Specifically, during the movement of the coal mining machine, the signal transmitting device transmits signals in real time, and the signal receiving devices on each hydraulic support are in signal receiving state. When the coal mining machine moves to a certain hydraulic support, the signal receiving device on that hydraulic support can receive the signal from the signal transmitting device and transmit the label of that hydraulic support to the analysis and processing subsystem accordingly.

[0052] When dynamically acquiring and displaying monitoring images from cameras at cable clamp bends corresponding to the working face area where the coal mining machine is located, the working face area where the coal mining machine is located is first determined based on the real-time position of the coal mining machine. Furthermore, in determining the working face area, the position detection subsystem is used in conjunction with a region determination strategy. This region determination strategy includes: determining whether the coal mining machine is located in the head triangle coal area, the middle coal cutting area, or the tail triangle coal area based on information transmitted by the position detection subsystem. When the coal mining machine's position signal is in the middle coal cutting area, the hydraulic support label information at adjacent times is compared, and the direction of the coal mining machine's operation is determined based on changes in the hydraulic support label values. Specifically, if the hydraulic support label value increases, the direction of the coal mining machine is determined to be right; if the hydraulic support label value decreases, the direction of the coal mining machine is determined to be left.

[0053] After the position detection subsystem determines the working face area where the coal mining machine is located and the direction of operation of the coal mining machine, the monitoring screen is collected according to the preset acquisition strategy.

[0054] Specifically, the preset acquisition strategy includes: when the coal mining machine is located in the triangular coal seam area at the head of the machine, acquiring monitoring images from all cameras covering the triangular coal seam area at the head of the machine; when the coal mining machine is located in the triangular coal seam area at the tail of the machine, acquiring monitoring images from all cameras covering the triangular coal seam area at the tail of the machine. The triangular coal seam area specifically refers to the area at both ends of the working face where coal is mined back using a mining process involving oblique cutting.

[0055] As attached Figure 2 As shown, according to the coal mining process requirements of the working face, in this embodiment, the length of the triangular coal oblique cutting area is set to n support lengths. That is, hydraulic supports 1 to n are the triangular coal working area at the head of the machine, hydraulic supports Nn to N are the triangular coal working area at the tail of the machine, and hydraulic supports n to Nn are the coal cutting area in the middle. When the coal mining machine is located in the triangular coal area at the head of the machine, and the length of the triangular coal area is n support lengths, all cameras covering supports 1 to n are brought up and displayed by the analysis and processing subsystem. The output interface is shown in the attached figure. Figure 5As shown in the diagram; "#" represents a number; 1# camera refers to camera number 1. The camera on hydraulic support n (to the left) refers to the nearest camera to the left of hydraulic support n, the camera on hydraulic support n (to the right) refers to the nearest camera to the right of hydraulic support n, and the camera on hydraulic support N / 2 (nearest) refers to the nearest camera on the N / 2th hydraulic support.

[0056] When the coal mining machine is located in the triangular coal seam area at the tail end, all cameras covering supports n to N will be activated and displayed by the analysis and processing subsystem. The output interface is shown in the attached figure. Figure 6 As shown in the figure; the camera on the left side of hydraulic support Nn refers to the nearest camera on the left side of hydraulic support Nn, and the camera on the right side of hydraulic support Nn refers to the nearest camera on the right side of hydraulic support Nn. The others are similar and will not be described in detail here.

[0057] The preset acquisition strategy also includes: when the coal mining machine leaves the triangular coal area at the head and enters the central coal cutting area, and the area determination strategy determines that the coal mining machine is moving to the right, i.e., the coal mining machine's position direction is determined to still be cutting coal to the right, and the real-time position of the coal mining machine is Z, acquiring the monitoring images from the cameras on both sides of the Z / 2th hydraulic support, as shown in the attached figure. Figure 7 As shown; when the coal mining machine walks out of the tail triangle coal area and enters the middle coal cutting area, and the area determination strategy determines that the coal mining machine is moving to the left, that is, the coal mining machine's position direction is determined to still be cutting coal to the left, and the real-time coal mining machine position is Z, the ( )th _ is collected N-Z The monitoring images from the cameras on both sides of the ( / 2+Z) hydraulic supports are shown in the attached image. Figure 8 As shown. With the change of the coal mining machine position Z, Z / 2, ( N-Z The value of ( / 2+Z) changes accordingly, and the selected camera changes accordingly. Furthermore, the monitoring footage from the fixed camera, specifically the camera near hydraulic support N / 2, is always captured and displayed in real-time.

[0058] Furthermore, it is understandable that the numbering sequence of hydraulic supports can be changed as needed, and correspondingly, the preset data acquisition strategy will be changed accordingly. Specifically: when the hydraulic support at the end of the triangular coal seam area at the working face is defined as number N, when the coal mining machine moves out of the triangular coal seam area and enters the central coal cutting area, and the real-time position of the coal mining machine is Z, the ( )th hydraulic support is acquired. N-Z The monitoring images from the cameras on both sides of the ( / 2+Z)th hydraulic support are collected; when the coal mining machine walks out of the tail triangular coal area and enters the middle coal cutting area, and the real-time position of the coal mining machine is Z, the monitoring images from the cameras on both sides of the Z / 2th hydraulic support are collected.

[0059] After determining the monitoring screen to be invoked, the analysis and processing subsystem, when displaying the monitoring screen, combines the monitoring screens from the camera at the cable clamp bend corresponding to the working face area where the coal mining machine is located with the monitoring screen from the fixed camera into a multi-grid display. The number of multi-grids can be selected according to the actual working face size, the number of hydraulic supports, etc. In this embodiment, a 3x3 multi-grid display is used.

[0060] Preferably, the analysis and processing subsystem is further provided with a cable anomaly early warning module; the cable anomaly early warning module is used to intelligently identify the cable operation status based on the monitoring screen; and to issue an early warning when it is identified that the cable has detached from the channel.

[0061] This embodiment also provides a method for monitoring cables in a fully mechanized mining face, using the fully mechanized mining face cable monitoring system described above; including the following steps: using a video subsystem to monitor the fully mechanized mining face in real time and transmitting the monitoring images to an analysis and processing subsystem via a network transmission system; using a position detection subsystem to confirm the position of the coal mining machine and transmitting the coal mining machine position signal to the analysis and processing subsystem in real time; the analysis and processing subsystem receiving and displaying the monitoring images from the video subsystem according to a monitoring strategy; the monitoring strategy is to collect and display the monitoring images from a fixed camera in real time, and determine the working face area where the coal mining machine is located based on the real-time position of the coal mining machine, dynamically collecting and displaying the monitoring images from the camera at the cable clamp bend corresponding to the working face area where the coal mining machine is located.

[0062] Preferably, this monitoring method also utilizes a cable anomaly early warning module to intelligently identify the cable's operational status based on the monitoring footage; and issues an early warning when the cable is identified as having detached from the cable tray. The overall method employs a camera to monitor the cable tray in real time, promptly identifying faults and issuing alarms, facilitating timely detection of anomalies and timely maintenance by staff. Specifically, when the cable anomaly early warning module performs intelligent identification based on the monitoring footage, it prioritizes image recognition. The first priority is the image containing the cable clamp; the second priority is the image of a regular cable without a cable clamp. During identification, it first identifies and confirms the image containing the cable clamp, comparing the surrounding cables and the cable tray; then it identifies and confirms the image of a regular cable without a cable clamp, comparing the surrounding cables and the cable tray. This setup is more targeted in identifying cable detachment from the cable tray, helping to improve fault identification efficiency.

[0063] This embodiment provides a cable monitoring system and method for fully mechanized mining faces. Through the coordination of a video subsystem, a position detection subsystem, and an analysis and processing subsystem, it can perform real-time, accurate, and dynamic monitoring of the cable status of fully mechanized mining faces. This helps to promptly resolve cable detachment issues. The system is simple to set up, easy to operate, and relatively intelligent. Furthermore, the monitoring scheme of this solution, combined with the location and direction of the coal mining machine, and production conditions such as the coal mining process, achieves zoned monitoring of different areas (including the headworks triangular coal working area, the middle coal cutting area, and the tailworks triangular coal working area) and fixed-point monitoring of important fault points (cable bending points). The monitoring scheme is meticulously arranged, and some monitoring images change in real time with the coal mining machine, providing dynamic monitoring. The acquired monitoring images are all highly valid, resulting in good monitoring performance.

[0064] Furthermore, for existing fully mechanized longwall mining face systems, the setup cost of this monitoring solution is relatively low, economical, and more suitable for thin coal seam environments. Given the current tense resource and environmental situation, coal resources, as non-renewable resources, are becoming increasingly scarce due to the continuous depletion of relatively easy-to-mine coal. Extending mining operations to the more widely distributed but more difficult-to-mine thin coal seams is a practical necessity. However, the limited mining space imposed by thin coal seams presents challenges in adapting many technologies applicable to conventional coal seams, including cable handling. Cable dragging systems used in conventional coal seams cannot be installed, necessitating a shift in focus to monitoring, but suitable monitoring methods are lacking. This solution addresses these challenges by providing a highly adaptable monitoring method for thin coal seam faces. Since the system's hardware is primarily based on existing cameras on hydraulic supports, without requiring additional components, it can fully match the limited mining space of thin coal seams. Moreover, this solution is also applicable to other coal seam scenarios, demonstrating good versatility.

[0065] Furthermore, the monitoring in this scheme is based on accurate judgment of the coal mining machine's location and direction of travel. Using the coal mining machine's own location as a foundation, and following regional determination strategies and preset acquisition strategies, dynamic monitoring of the cable clamp bends behind the coal mining machine is achieved, thus achieving better monitoring results. Compared to conventional monitoring schemes, even in ordinary monitoring fields, some monitoring schemes can achieve dynamic monitoring, but their monitoring is aimed at moving targets, and the displayed image is also of the moving target. This reflects that the usual monitoring approach is to directly monitor the target, but this is not applicable to the cables of fully mechanized mining faces.

[0066] The cable traverses a large area, including a significant section of the working face. Monitoring the entire cable network without specific targeting is insufficient. While the displayed images provide a panoramic view, they are highly homogenized and similar, creating significant noise and hindering fault identification. It makes it difficult to pinpoint the specific cable section causing the problem and hinders timely troubleshooting. Furthermore, monitoring fault-prone areas is challenging because the cable clamp bends behind the mining machine change position with the machine's movement. Accurately identifying these changes by monitoring only the cable itself is difficult, rendering existing methods for monitoring moving objects unsuitable for cable monitoring in fully mechanized mining faces.

[0067] This solution overcomes the aforementioned problems. Based on the mobile coal mining machine, it achieves dynamic monitoring of related objects (i.e., the bend position of the cable clamp behind the coal mining machine). Through the set algorithm strategy, the coal mining machine and related objects are accurately associated. It makes full use of the regional division characteristics of the fully mechanized mining face itself, the arrangement and folding method of the coal mining machine cable itself, and the characteristics of the operation mode. In particular, the bend position of the cable clamp behind the coal mining machine is selected as the dynamic monitoring point, and the relative relationship between the position of the coal mining machine and the position of the cable clamp bend position is accurately determined. Using this relative relationship, dynamic tracking of the cable clamp bend position is achieved, so that the collected monitoring images remain highly effective at all times. The monitoring is highly targeted and highly adaptable to the cables of the thin coal seam fully mechanized mining face.

[0068] Example 2:

[0069] A cable monitoring system for fully mechanized mining faces has a special arrangement of cameras in the video subsystem, based on Embodiment 1.

[0070] In the video subsystem, a camera is installed every X hydraulic supports, where X is a positive integer. The cameras are evenly distributed, which can evenly divide the working surface.

[0071] Preferably, based on monitoring needs, the cameras in the video subsystem can be further divided into coal face camera groups and support camera groups. The coal face camera group has one camera every X / 2 hydraulic supports, and the support camera group has one camera every X hydraulic supports, where X is a positive integer, typically 4 or 6. In this embodiment, X = 6; that is, one coal face camera is installed every 3 supports, and one support camera is installed every 6 supports. Alternatively, the monitoring angle of the coal face camera group can be adjusted to face the coal face, and the monitoring angle of the support camera group can be adjusted to face the supports.

[0072] This embodiment also provides a method for monitoring cables in a fully mechanized mining face, which is the same as the method described in Embodiment 1, and therefore will not be repeated.

[0073] This embodiment provides a cable monitoring system and method for fully mechanized mining faces, which specifies the arrangement of cameras. Different camera arrangements or division methods can be selected according to monitoring needs, allowing for more detailed monitoring of the working face and facilitating timely confirmation of fault conditions.

[0074] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A cable monitoring system for a fully mechanized mining face, characterized in that, It includes a video subsystem, a network transmission subsystem, a location detection subsystem, and an analysis and processing subsystem; The video subsystem includes several cameras, which are arranged on a hydraulic support; and the camera in the video subsystem whose position is closest to the center of the working surface is defined as a fixed camera. Both the video subsystem and the position detection subsystem establish a communication connection with the analysis and processing subsystem through the network transmission subsystem; the position detection subsystem is used to confirm the position of the coal mining machine and transmit the coal mining machine position signal to the analysis and processing subsystem in real time. The analysis and processing subsystem is used to receive and display the monitoring images from the video subsystem according to the monitoring strategy. The monitoring strategy is to collect and display the monitoring images from fixed cameras in real time, and to determine the working face area where the coal mining machine is located based on the real-time position of the coal mining machine, and to dynamically collect and display the monitoring images from the cameras at the cable clamp bends corresponding to the working face area where the coal mining machine is located. When determining the working face area where the coal mining machine is located, the position detection subsystem is used to make the determination according to the area determination strategy. The region determination strategy includes: determining whether the coal mining machine is in the head triangular coal area, the middle coal cutting area, or the tail triangular coal area based on the information transmitted by the position detection subsystem; and when the coal mining machine position signal is in the middle coal cutting area, comparing the hydraulic support number information at adjacent times, and determining the coal mining machine running direction based on the change in the hydraulic support number value. When dynamically acquiring and displaying the monitoring images of the cameras at the cable clamp bends corresponding to the working face area where the coal mining machine is located, the acquisition is performed according to a preset acquisition strategy. The preset acquisition strategy includes: when the coal mining machine is located in the head triangle coal area, acquiring the monitoring images of all cameras covering the head triangle coal area; when the coal mining machine is located in the tail triangle coal area, acquiring the monitoring images of all cameras covering the tail triangle coal area. The number of hydraulic supports installed on the working face is N. When the coal mining machine moves out of the triangular coal area at the head and enters the middle coal cutting area, and the real-time position of the coal mining machine is Z, the monitoring images of the cameras on both sides of the Z / 2th hydraulic support are collected; when the coal mining machine moves out of the triangular coal area at the tail and enters the middle coal cutting area, and the real-time position of the coal mining machine is Z, the monitoring images of the cameras on both sides of the Z / 2th hydraulic support are collected. The monitoring images from the cameras on the left and right sides of the hydraulic support.

2. The cable monitoring system for a fully mechanized mining face according to claim 1, characterized in that, The network transmission subsystem includes a switch; the switch is used to connect the working face network and the mine ring network; the video subsystem, the position detection subsystem and the analysis and processing subsystem establish a communication connection through the switch.

3. The cable monitoring system for a fully mechanized mining face according to claim 1, characterized in that, The hydraulic supports are numbered sequentially from 1 to N, starting from the triangular coal area at the machine head; the fixed camera is the camera in the video subsystem closest to the N / 2 hydraulic support.

4. The cable monitoring system for a fully mechanized mining face according to claim 1, characterized in that, The position detection subsystem includes a signal transmitting device and a signal receiving device that establish communication connections with each other; the signal transmitting device is installed on the coal mining machine, and the signal receiving device is installed on each hydraulic support; The signal transmitting device is used to transmit the position signal of the coal mining machine to the signal receiving device; the signal receiving device is used to receive the position signal of the coal mining machine and transmit the hydraulic support label corresponding to the position signal of the coal mining machine to the analysis and processing subsystem.

5. A cable monitoring system for a fully mechanized mining face according to claim 1, characterized in that, When the analysis and processing subsystem displays the monitoring screen, it combines the monitoring screens from the camera at the cable clamp bend corresponding to the working face area where the coal mining machine is located with the monitoring screens from the fixed camera into a multi-grid display.

6. The cable monitoring system for a fully mechanized mining face according to claim 1, characterized in that, The analysis and processing subsystem is also equipped with a cable anomaly early warning module; the cable anomaly early warning module is used to intelligently identify the cable operation status based on the monitoring screen; and to issue an early warning when it is identified that the cable has detached from the channel.

7. A method for monitoring cables in a fully mechanized mining face, characterized in that, The fully mechanized mining face cable monitoring system described in any one of claims 1-6 includes the following steps: using a video subsystem to monitor the fully mechanized mining face in real time and transmitting the monitoring images to an analysis and processing subsystem via a network transmission system; using a position detection subsystem to confirm the position of the coal mining machine and transmitting the coal mining machine position signal to the analysis and processing subsystem in real time; the analysis and processing subsystem receiving and displaying the monitoring images from the video subsystem according to a monitoring strategy; the monitoring strategy is to collect and display the monitoring images from a fixed camera in real time, and determine the working face area where the coal mining machine is located based on the real-time position of the coal mining machine, and dynamically collect and display the monitoring images from the camera at the cable clamp bend corresponding to the working face area where the coal mining machine is located.

Images