Real-time monitoring system and method for coal flow of scraper conveyor

Abstract

The invention provides a scraper conveyor coal flow real-time monitoring system and method, and belongs to the technical field of coal flow monitoring. The problem that the coal flow on the scraper conveyor is not uniformly distributed due to the fact that the coal cutting amount and the coal sweeping amount are not organically combined in the coal flow monitoring of the scraper conveyor in the prior art is solved. Comprising coal flow monitoring devices used for collecting coal flow data generated by coal cutting or coal sweeping of a left rocker arm or a right rocker arm in the coal mining process in real time, the two coal flow monitoring devices are connected with a coal flow resolver, and the coal flow resolver communicates with a coal mining machine control system and a scraper conveyor control system. The coal flow resolver is used for receiving data acquired by the coal flow monitoring devices on the left / right rocker arm, resolving the acquired data into actual coal flow, and sending the coal flow of the left / right rocker arm and total coal flow data to the coal mining machine control system and the scraper conveyor control system; the method is applied to monitoring and adjusting the coal flow of the scraper conveyor on the fully mechanized coal mining face.

Description

Technical Field

[0001] The invention provides a scraper conveyor coal flow real-time monitoring system and method, belonging to the technical field of coal flow monitoring. Background Art

[0002] The scraper conveyor of the fully mechanized coal mining face uses the open chute as the bearing part of coal, gangue or materials, fixes the scraper on the chain to form a scraper chain and uses it as a traction component; when the head transmission part is started, the sprocket on the head shaft is driven to rotate, so that the scraper chain circulates and drives the material to move along the chute and unload at the head. The scraper chain bypasses the sprocket for stepless closed circulation to complete the material transportation. The scraper conveyor is responsible for continuously and efficiently transporting the coal cut by the coal mining machine to the transfer machine in the working face, and then transporting it to the chute belt conveyor through the transfer machine and crusher. However, in the actual operation process, the distribution of coal flow on the scraper conveyor is often uneven, and the change of coal flow has time and space characteristics, that is, the distribution state of coal flow on the scraper conveyor will change with the change of time and space. This is due to the combined effect of multiple factors such as the cutting method of the coal mining machine, the occurrence conditions of the coal seam, and the operating parameters of the scraper conveyor.

[0003] Uneven distribution of coal flow on the scraper conveyor will lead to uneven load during operation, thus affecting its operating efficiency. Uneven load may cause aggravated wear of the scraper chain, resulting in increased energy consumption and increased equipment failure rate. Uneven distribution of coal flow may also pose a threat to safe production. For example, when too much coal flow accumulates on the scraper conveyor, it may cause equipment overload, jamming or even damage, leading to safety accidents. Uneven distribution of coal flow will also increase the difficulty and cost of equipment maintenance. Due to the increased wear and failure rate of equipment caused by uneven load, more frequent equipment maintenance and overhaul are required, which increases maintenance costs and downtime. In summary, the coal flow of the scraper conveyor in the comprehensive mining face has an important impact on the operating efficiency, safe production and equipment maintenance of the equipment.

[0004] At present, there are some technical solutions that use sensors or image processing to monitor the coal flow of scraper conveyors. However, the existing technical solutions ignore the separate monitoring of the coal cutting and sweeping amounts of the coal mining machine input into the scraper conveyor, and cannot fundamentally solve the problem of uneven coal flow distribution on the scraper conveyor. Summary of the invention

[0005] In order to solve the problem that the existing method does not organically combine the coal cutting amount and the coal sweeping amount in the scraper conveyor coal flow monitoring, resulting in uneven coal flow distribution on the scraper conveyor, the present invention proposes a scraper conveyor coal flow real-time monitoring system and method.

[0006] The technical solution adopted by the present invention is: a real-time monitoring system for coal flow of a scraper conveyor, including a coal flow monitoring device installed on the left / right rocker arm of the coal mining machine for real-time collection of coal flow data generated by the left / right rocker arm cutting or sweeping coal during the coal mining process. The two coal flow monitoring devices are respectively connected to a coal flow solver, and the coal flow solver communicates with the coal mining machine control system and the scraper conveyor control system respectively. The coal flow solver is used to receive data collected by the coal flow monitoring device on the left / right rocker arm, and solve the collected data into actual coal flow, and send the left / right rocker arm coal flow and total coal flow data to the coal mining machine control system and the scraper conveyor control system respectively.

[0007] Furthermore, the coal flow monitoring device can scan the coal flow of the scraper conveyor by using radar recognition, laser ranging, image recognition or other technologies to obtain the cross-sectional profile height information of the coal flow.

[0008] Furthermore, the coal flow solver calculates the actual coal flow cross-sectional area by comparing the contour lines of the scraper conveyor when loaded and when unloaded, thereby obtaining the actual coal flow.

[0009] Furthermore, the calculation formula of coal flow is as follows:

[0010] Q = A × V × Δt;

[0011] In the above formula: Q is the coal flow rate, A is the actual coal flow cross-sectional area, Δt is the measurement time interval, and V is the average flow velocity within the measurement time interval.

[0012] A method for real-time monitoring of coal flow in a scraper conveyor comprises the following steps:

[0013] S1: Install two coal flow monitoring devices in the scraper conveyor coal flow real-time monitoring system at appropriate positions of the left / right rocker arm of the coal mining machine, start the system, and collect the coal flow data generated by the coal mining machine when cutting or sweeping coal;

[0014] S2: Monitoring and adjustment of the coal cutting and sweeping amount of the coal shearer: The coal flow solver receives the coal flow data collected by the coal flow monitoring device, calculates the left / right rocker arm coal flow, and sends the left / right rocker arm coal flow data to the coal shearer control system. The coal shearer control system adjusts the coal sweeping speed or force and traction speed of the coal shearer according to the monitored real-time coal flow data to ensure synchronous control of coal cutting and sweeping operations, avoid cutting coal too fast and sweeping coal untimely, or cutting coal too slowly and causing the coal sweeping device to run idle;

[0015] S3: Control of the total coal flow of the scraper conveyor: Through the adjustment and coordination of the coal cutting amount and the coal sweeping amount by the coal mining machine control system, the total coal flow of the scraper conveyor is controlled within a relatively stable and uniform trend and range. When local overload or no load is detected, the chain speed of the scraper conveyor is automatically adjusted to achieve load balancing adjustment of the scraper conveyor.

[0016] Furthermore, in step S2, according to the actual running direction of the coal mining machine, it is determined whether the coal flow monitoring device on the left / right rocker arm collects the coal cutting amount data or the coal sweeping amount data;

[0017] When the coal mining machine is mining in the left direction, the coal flow monitoring device on the left rocker arm collects data on the amount of coal cut, and the left rocker arm is the coal cutting arm at this time. The coal flow monitoring device on the right rocker arm collects data on the amount of coal swept, and the right rocker arm is the coal sweeping arm at this time.

[0018] When the coal mining machine moves to the right to mine coal, the coal flow monitoring device on the right rocker arm collects data on the amount of coal cut, and the coal flow monitoring device on the left rocker arm collects data on the amount of coal swept.

[0019] Furthermore, the coal cutting amount is controlled according to the real-time monitoring data of the coal sweeping amount, so that the total amount of coal sweeping and coal cutting is kept relatively balanced, so that the coal flow load of the scraper conveyor is relatively balanced.

[0020] Furthermore, the traction speed of the coal mining machine is dynamically adjusted according to the real-time monitoring data of the coal cutting amount to ensure the coal cutting efficiency and the uniformity of the coal amount.

[0021] Furthermore, in step S3, when the sum of the coal cutting amount and the coal sweeping amount exceeds the carrying capacity of the scraper conveyor or is lower than the production demand, the system sends an alarm signal; and when the coal flow increases, the chain speed of the scraper conveyor is increased; when the coal flow decreases, the chain speed of the scraper conveyor is reduced.

[0022] Furthermore, the chain speed of the scraper conveyor adopts an adaptive correction algorithm, and the chain speed dynamic compensation formula is:

[0023] Vcorrected=Vbase+ΔK* ( Qactual / Qdesign-1 ) 2 +β*(Imotor / Irated);

[0024] Where: V correcte Represents the corrected chain speed; V base Represents the design chain speed, and the adjustment range is generally 0.8-1.5m / s; Q actual is the actual coal transport volume, i.e. the sum of the coal cutting volume and coal sweeping volume; Q designis the designed transport capacity of the scraper conveyor; ΔK is the coal flow deviation coefficient, ranging from 0.2 to 0.8. When the gangue content is greater than 30%, a higher value is used; β is the motor load supplement factor, the default value is 0.15, and it can be adaptively adjusted according to voltage fluctuations; I motor is the real-time motor current, and the average value of the motors before and after the drive unit is taken during calculation; I rated is the rated current of the motor, and the average current of the motors before and after the drive unit is taken by the computer.

[0025] The beneficial effects of the present invention compared with the prior art are as follows:

[0026] (1) Avoid uneven load on the scraper conveyor during operation and improve coal mining production efficiency;

[0027] (2) Reducing uneven load may lead to increased wear of the scraper chain, increased energy consumption, and increased equipment failure rate;

[0028] (3) Improved the safety productivity of coal mining in fully mechanized mining face;

[0029] (4) Reduce the increase in equipment maintenance difficulty and cost due to uneven distribution of coal flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] Figure 1 It is a structural block diagram of the system of the present invention;

[0032] Figure 2 It is the working principle diagram of the coal flow monitoring device and the coal flow solver;

[0033] Figure 3 This is a schematic diagram of system installation and operation;

[0034] In the figure: 1 is a coal mining machine, 2 is a scraper conveyor, 3 is a left rocker arm coal flow monitoring device, and 4 is a right rocker arm coal flow monitoring device. DETAILED DESCRIPTION

[0035] like Figures 1 to 3As shown, the present invention provides a real-time monitoring system for coal flow of a scraper conveyor, which is mainly composed of a left rocker arm coal flow monitoring device 3, a right rocker arm coal flow monitoring device 4, a coal flow solver and corresponding interface modules. The left rocker arm coal flow monitoring device 3 and the right rocker arm coal flow monitoring device 4 are used to collect in real time the coal flow data generated by the left / right rocker arm of the coal mining machine 1 when cutting or sweeping coal during the coal mining process; the coal flow solver is used to receive the collected data of the left rocker arm coal flow monitoring device 3 and the right rocker arm coal flow monitoring device 4, accurately solve the collected data into actual coal flow, and send the left / right rocker arm coal flow, total coal flow and other data to the coal mining machine control system and the scraper conveyor control system respectively. In this embodiment, the interface form of the interface module is not specifically limited.

[0036] The left rocker arm coal flow monitoring device 3 and the right rocker arm coal flow monitoring device 4 can use radar recognition, laser ranging, image recognition or other technologies to scan the coal flow of the scraper conveyor 2 to obtain the cross-sectional profile height information of the coal flow. Figure 2 As shown, by comparing the contour line of the scraper conveyor 2 when it is unloaded, the actual coal flow cross-sectional area can be calculated, and then the actual coal flow rate can be obtained.

[0037] The mathematical model for calculating the actual coal flow is not unique, it depends on the specific measurement method and application scenario. However, based on the above information on the actual coal flow cross-sectional area, an approximate mathematical model can be constructed to calculate the coal flow. The following is a possible mathematical model:

[0038] Within the measurement time interval Δt, the coal flow rate Q can be calculated by multiplying the actual coal flow cross-sectional area A by the average flow velocity V within the period, that is: Q = A×V×Δt.

[0039] In addition, in order to realize real-time and accurate monitoring of the coal flow of the scraper conveyor 2, and dynamically adjust the coal cutting amount according to the coal sweeping amount during the coal mining process, thereby effectively controlling the total coal flow of the scraper conveyor 2, the present invention also proposes a real-time monitoring method for the coal flow of the scraper conveyor, comprising the following steps:

[0040] S1: Installation and configuration of scraper conveyor 2 coal flow monitoring system, the specific implementation method is as follows:

[0041] (1) Installation location: A coal flow monitoring device is installed on each of the left and right rocker arms of the coal mining machine 1, such as Figure 3 The installation position in the figure is adjustable so as to accurately capture the change in the amount of coal produced by the coal mining machine 1 when cutting or sweeping coal.

[0042] (2) Monitoring principle: The coal flow monitoring device can use radar sensors, laser range sensors or image recognition technology to monitor the coal volume in real time. These technologies can accurately measure the size, density and volume of coal blocks generated by the coal mining machine 1 during the cutting process, thereby calculating the coal volume.

[0043] (3) Data transmission: The coal flow monitoring device should transmit real-time data to the coal mining machine control system and the scraper conveyor control system via wired or wireless means to ensure the stability and real-time nature of data transmission so that timely adjustments can be made.

[0044] S2: Monitoring and adjusting the coal cutting and sweeping amount of the coal mining machine 1, the specific implementation steps are as follows:

[0045] S2.1: The coal flow solver calculates the left / right rocker arm coal flow through the built-in mathematical model and sends it to the coal mining machine control system. If the coal mining machine 1 mines coal in the left direction, the left rocker arm coal flow monitoring device 3 collects the coal cutting amount data (so the left rocker arm is the coal cutting arm), and the right rocker arm coal flow monitoring device 4 collects the coal sweeping amount data (so the right rocker arm is the coal sweeping arm); if the coal mining machine 1 mines coal in the right direction, the right rocker arm coal flow monitoring device 4 collects the coal cutting amount data, and the left rocker arm coal flow monitoring device 3 collects the coal sweeping amount data.

[0046] S2.2: Coal sweeping volume monitoring: According to the actual working conditions of the coal mining machine 1, determine whether the left rocker arm coal flow monitoring device 3 and the right rocker arm coal flow monitoring device 4 collect data on the coal cutting volume or the coal sweeping volume. These data will serve as the basis for adjusting the coal sweeping volume.

[0047] S2.3: Coal sweeping amount adjustment: The coal cutting amount is controlled according to the real-time monitoring data of the coal sweeping amount. The coal mining machine control system can dynamically adjust the coal cutting speed or strength of the coal cutting arm of the coal mining machine 1 to ensure that the total amount of coal sweeping and coal cutting remains relatively balanced, so that the coal flow load of the scraper conveyor 2 is relatively balanced.

[0048] S2.4: Speed ​​adjustment of coal mining machine 1: adjust the traction speed of coal mining machine 1 according to the real-time monitoring data of coal cutting amount, ensure the coal cutting efficiency and coal quantity uniformity, and avoid the situation of poor coal sweeping effect.

[0049] S3: Control of the total coal flow of the scraper conveyor 2, the specific implementation steps are as follows:

[0050] S3.1: Total coal flow control: Through the adjustment and coordination of the coal cutting amount and the coal sweeping amount by the coal mining machine control system, the total coal flow of the scraper conveyor 2 can be controlled within a relatively stable and uniform trend and range. The coal mining machine control system automatically adjusts the coal cutting speed of the coal mining machine 1 and the coal sweeping speed of the coal sweeping arm according to the real-time monitored coal flow data, combined with the conveying capacity and production demand of the scraper conveyor 2, to keep the total coal flow of the scraper conveyor 2 within the set range.

[0051] S3.2: Alarm and protection: When the sum of the coal cutting volume and the coal sweeping volume exceeds the carrying capacity of the scraper conveyor 2 or is lower than the production demand, the system will send out an alarm signal; and when the coal flow increases, the chain speed of the scraper conveyor 2 will be increased; when the coal flow decreases, the chain speed of the scraper conveyor 2 will be reduced.

[0052] The chain speed of scraper conveyor 2 adopts an adaptive correction algorithm, and the chain speed dynamic compensation formula is:

[0053] Vcorrected=Vbase+ΔK* ( Qactual / Qdesign-1 ) 2 +β*(Imotor / Irated);

[0054] Where: V correcte Represents the corrected chain speed; V base Represents the design chain speed, and the adjustment range is generally 0.8-1.5m / s; Q actual is the actual coal transport volume, i.e. the sum of the coal cutting volume and coal sweeping volume; Q design is the designed transport capacity of the scraper conveyor; ΔK is the coal flow deviation coefficient, ranging from 0.2 to 0.8. When the gangue content is greater than 30%, a higher value is used; β is the motor load supplement factor, the default value is 0.15, and it can be adaptively adjusted according to voltage fluctuations; I motor is the real-time motor current, and the average value of the motors before and after the drive unit is taken during calculation; I rated is the rated current of the motor, and the average current of the motors before and after the drive unit is taken by the computer.

[0055] Through the implementation of the above method, real-time and accurate monitoring of the coal flow of the scraper conveyor 2 can be achieved, and the coal cutting amount can be dynamically adjusted in combination with the coal sweeping amount of the coal mining machine 1, thereby effectively controlling the total coal flow of the scraper conveyor 2 and improving production efficiency and safety.

[0056] The present invention will be further described below based on specific embodiments.

[0057] Example 1

[0058] Install a video AI coal flow monitoring device on the left / right rocker arm of coal mining machine 1. The installation position is referenced Figure 3The position is adjustable to accurately capture the change in coal volume generated by the coal mining machine 1 when cutting or sweeping coal. Two video AI coal flow monitoring devices collect left / right rocker arm coal flow monitoring data and send it to the coal flow solver through a 100M Ethernet twisted pair cable. The coal flow solver accurately solves the collected data into actual coal flow, and sends the left / right rocker arm coal flow, total coal flow and other data to the coal mining machine control system and scraper conveyor control system through a 100M Ethernet twisted pair cable.

[0059] The video AI coal flow monitoring device uses video recognition technology to scan the coal flow of scraper conveyor 2 and extract image information on the surface of the coal flow; the technologies that may be involved include image enhancement, filtering, edge detection, etc. to improve image quality and clarity; and then use image processing technology to identify and extract the contour information of the coal flow surface. When the scraper conveyor 2 is in the no-load state, the contour line of the scraper conveyor 2 is extracted using the same video recognition technology, which will serve as the baseline for the subsequent calculation of the actual coal flow cross-sectional area. The contour of the coal flow surface is compared with the no-load contour, and the actual coal flow cross-sectional contour is determined by calculating the difference between the two. The actual coal flow cross-sectional area is calculated using mathematical models such as integration and differential method. Finally, the coal flow is calculated using the possible approximate mathematical model Q=A×V×Δt constructed above.

[0060] According to the actual working conditions of the coal mining machine 1, the left rocker arm coal flow monitoring device 3 is set to monitor the amount of coal (coal cutting amount) when the coal mining machine 1 cuts to the left, and the right rocker arm coal flow monitoring device 4 is set to monitor the amount of coal when the coal mining machine 1 cuts to the right. According to the real-time monitoring data of the coal sweeping amount, the coal mining machine control system dynamically adjusts the coal cutting speed or force of the coal cutting arm of the coal mining machine 1 to control the coal cutting amount. For example, when the coal sweeping amount increases, the coal cutting speed of the coal cutting arm should also be accelerated accordingly to keep the coal flow of the scraper conveyor 2 stable. While adjusting the coal cutting amount according to the real-time monitoring data of the coal sweeping amount, the traction speed of the coal mining machine 1 is further adjusted to avoid the situation where the coal sweeping effect is poor.

[0061] When the sum of the coal cutting amount and the coal sweeping amount exceeds the carrying capacity of the scraper conveyor 2 or is lower than the production demand, the system sends out an alarm signal and suspends the coal mining operation or adjusts the running speed of the scraper conveyor 2.

[0062] Example 2

[0063] A radar signal coal flow monitoring device is installed on the left / right rocker arm of the coal mining machine 1. The installation position is referenced Figure 3The position is adjustable, so as to accurately capture the change of coal volume generated by the coal mining machine 1 when cutting or sweeping coal. The two radar coal flow monitoring devices respectively collect the left / right rocker arm coal flow monitoring data, and then send it to the coal flow solver through the wireless WIFI network. The coal flow solver accurately solves the collected data into the actual coal flow, and sends the left / right rocker arm coal flow, total coal flow and other data to the coal mining machine control system and the scraper conveyor control system through the 100M Ethernet twisted pair cable.

[0064] The radar signal coal flow monitoring device adopts radar recognition technology, especially laser radar, which can measure the distance of the target object by emitting a laser beam and receiving the signal reflected back. The laser radar is installed in an appropriate position to continuously scan the coal flow on the scraper conveyor 2. During the scanning process, the laser radar will record the distance and angle information of each scanning point to construct the cross-sectional profile of the coal flow. When the scraper conveyor 2 is unloaded, a similar scan is also performed to obtain the unloaded contour line of the scraper conveyor 2. By comparing the cross-sectional profile of the coal flow with the unloaded contour line, the actual cross-sectional profile of the coal flow can be calculated, and the actual cross-sectional area of ​​the coal flow can be calculated using mathematical models such as integration and differential method.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A real-time monitoring system for coal flow of a scraper conveyor, characterized in that: It includes a coal flow monitoring device installed on the left / right rocker arm of the coal mining machine for real-time collection of coal flow data generated by the left / right rocker arm cutting or sweeping coal during the coal mining process. The two coal flow monitoring devices are respectively connected to a coal flow solver, and the coal flow solver communicates with the coal mining machine control system and the scraper conveyor control system respectively. The coal flow solver is used to receive data collected by the coal flow monitoring device on the left / right rocker arm, and solve the collected data into actual coal flow, and send the left / right rocker arm coal flow and total coal flow data to the coal mining machine control system and the scraper conveyor control system respectively.

2. A real-time monitoring system for coal flow of a scraper conveyor according to claim 1, characterized in that: The coal flow monitoring device scans the coal flow of the scraper conveyor by using radar recognition, laser ranging or image recognition technology to obtain the cross-sectional profile height information of the coal flow.

3. A scraper conveyor coal flow real-time monitoring system according to claim 2, characterized in that: The coal flow solver calculates the actual coal flow cross-sectional area by comparing the contour lines of the scraper conveyor when loaded and when unloaded, and then obtains the actual coal flow.

4. A scraper conveyor coal flow real-time monitoring system according to claim 3, characterized in that: The calculation formula of coal flow is as follows: Q = A × V × Δt; In the above formula: Q is the coal flow rate, A is the actual coal flow cross-sectional area, Δt is the measurement time interval, and V is the average flow velocity within the measurement time interval.

5. A method for real-time monitoring of coal flow in a scraper conveyor, characterized in that: The following steps are involved: S1: Install two coal flow monitoring devices in the real-time monitoring system for coal flow of a scraper conveyor according to any one of claims 1 to 4 at appropriate positions of the left / right rocker arm of the coal mining machine, start the system, and collect coal flow data generated by the coal mining machine when cutting or sweeping coal; S2: Monitoring and adjustment of the coal cutting and sweeping amount of the coal shearer: The coal flow solver receives the coal flow data collected by the coal flow monitoring device, calculates the left / right rocker arm coal flow, and sends the left / right rocker arm coal flow data to the coal shearer control system. The coal shearer control system adjusts the coal sweeping speed or force and traction speed of the coal shearer according to the monitored real-time coal flow data to ensure synchronous control of coal cutting and sweeping operations; S3: Control of the total coal flow of the scraper conveyor: Through the adjustment and coordination of the coal cutting amount and the coal sweeping amount by the coal mining machine control system, the total coal flow of the scraper conveyor is controlled within a relatively stable and uniform trend and range. When local overload or no load is detected, the chain speed of the scraper conveyor is automatically adjusted to achieve load balancing adjustment of the scraper conveyor.

6. A method for real-time monitoring of coal flow in a scraper conveyor according to claim 5, characterized in that: In step S2, according to the actual running direction of the coal mining machine, it is determined whether the coal flow monitoring device on the left / right rocker arm collects the coal cutting amount data or the coal sweeping amount data; When the coal mining machine is mining in the left direction, the coal flow monitoring device on the left rocker arm collects data on the amount of coal cut, and the left rocker arm is the coal cutting arm at this time. The coal flow monitoring device on the right rocker arm collects data on the amount of coal swept, and the right rocker arm is the coal sweeping arm at this time. When the coal mining machine moves to the right to mine coal, the coal flow monitoring device on the right rocker arm collects data on the amount of coal cut, and the coal flow monitoring device on the left rocker arm collects data on the amount of coal swept.

7. A method for real-time monitoring of coal flow in a scraper conveyor according to claim 6, characterized in that: The coal cutting amount is controlled according to the real-time monitoring data of the coal sweeping amount, so that the total amount of coal sweeping and coal cutting is kept relatively balanced, so that the coal flow load of the scraper conveyor is relatively balanced.

8. A method for real-time monitoring of coal flow in a scraper conveyor according to claim 7, characterized in that: The traction speed of the coal mining machine is dynamically adjusted according to the real-time monitoring data of the coal cutting amount to ensure the coal cutting efficiency and coal quantity uniformity.

9. A method for real-time monitoring of coal flow in a scraper conveyor according to claim 6, characterized in that: In step S3, when the sum of the coal cutting amount and the coal sweeping amount exceeds the carrying capacity of the scraper conveyor or is lower than the production demand, the system sends out an alarm signal; and When the coal flow rate increases, the chain speed of the scraper conveyor is increased; when the coal flow rate decreases, the chain speed of the scraper conveyor is reduced.

10. A method for real-time monitoring of coal flow in a scraper conveyor according to claim 9, characterized in that: The chain speed of the scraper conveyor adopts an adaptive correction algorithm, and the chain speed dynamic compensation formula is: Vcorrected=Vbase+ΔK* ( Qactual / Qdesign-1 ) 2 +β*(Imotor / Irated); Where: V corrected Represents the corrected chain speed; V base Represents the designed chain speed; Q actual is the actual coal transport volume, i.e. the sum of the coal cutting volume and coal sweeping volume; Q design is the designed transport capacity of the scraper conveyor; ΔK is the coal flow deviation coefficient; β is the motor load supplement factor; I motor is the real-time motor current; I rated is the rated current of the motor.

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