A conveyor belt speed control system for coal flow detection

Abstract

The present invention discloses a conveyor belt speed control system for coal flow detection, which relates to the field of automatic control technology, and solves the technical problems that the conveyor belt speed detection cost is high and the conveyor belt is difficult to dynamically adjust the speed according to the amount of coal during operation; the present invention extracts target data, divides the conveyor belt based on the target data to obtain a target area, and installs a detection device based on the target area; obtains the load information of the target area through the detection device; obtains the load information, and obtains the standard speed of the conveyor belt through the load information; runs the conveyor belt in steps based on the standard speed to obtain a speed instruction; and controls the conveyor belt based on the speed instruction to solve the above technical problems. The present invention can reduce the cost of conveyor belt monitoring while also reducing the energy consumption caused by the conveyor belt always running at a high speed through dynamic speed regulation, thereby improving the real-time performance of the conveyor belt speed control.

Description

Technical Field

[0001] The invention belongs to the field of automatic control, in particular to a conveyor belt speed regulation control system for coal flow detection. Background Art

[0002] Coal is one of the world's main energy resources and is widely used in power generation, industrial production, heating and other fields. As a common material handling equipment in coal mining enterprises, conveyor belts play a vital role in the coal transportation process. At the same time, with the development of image processing technology, conveyor belt speed control based on conveyor belt coal flow detection technology has also been widely used. Conveyor belt speed control is a system that can obtain the current amount of coal through detection equipment and adjust the speed of the conveyor belt according to the amount of coal.

[0003] In traditional conveyor belt speed control systems, most speed control systems perform overall detection and analysis of the conveyor belt, which not only increases the cost of conveyor belt detection, but also reduces the operating efficiency of the system. At the same time, when the conveyor belt is running, it is difficult for the speed control system to dynamically adjust the speed according to the amount of coal. Using a fixed speed control method is difficult to meet the growing production needs and requirements for production safety and efficiency.

[0004] Therefore, the present invention discloses a conveyor belt speed control system for coal flow detection, which is used to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a conveyor belt speed control system for coal flow detection, which is used to solve the technical problems that the conveyor belt speed detection cost is high and the conveyor belt is difficult to dynamically adjust the speed according to the amount of coal during operation. The present invention solves the above problems by establishing a target area, obtaining load information based on the target area, obtaining the standard speed and speed instruction of the conveyor belt through the load information, and controlling the conveyor belt based on the speed instruction.

[0006] To achieve the above-mentioned object, a first aspect of the present invention provides a conveyor belt speed control system for coal flow detection, comprising: a conveyor identification module, and a planning module, a speed control module and a database connected thereto;

[0007] The planning module is used to extract target data, divide the conveyor belt into target areas based on the target data, and install a detection device based on the target area; wherein the target data includes the length of the conveyor belt and the angle between the conveyor belt and the horizontal line; the detection device includes a camera and a weight detector;

[0008] The transmission identification module is used to obtain the load information of the target area through the detection device; wherein the load information includes the load weight and the load volume;

[0009] The speed control module is used to obtain load information, obtain the standard speed of the conveyor belt through the load information; operate the conveyor belt in steps based on the standard speed to obtain speed instructions; and control the conveyor belt based on the speed instructions;

[0010] The database is used to store data.

[0011] Preferably, dividing the conveyor belt based on the target data to obtain the target area includes:

[0012] Extract the length L of the conveyor belt, perform three-dimensional modeling on the horizontally placed conveyor belt, simulate the result of the three-dimensional modeling, divide the conveyor belt evenly into several areas, and mark the length of the area as the standard length BL;

[0013] The angle α between the conveyor belt and the horizontal line is extracted, and the preset length ML is obtained by calculating the standard length BL and the angle α. The specific calculation method is: ML = (1-β×arctan(α / 90 ° ))×BL; where β is the proportionality coefficient;

[0014] The conveyor belt is evenly divided into L / ML preset areas based on the preset length ML, the preset areas are sorted according to the distance from the feed port, and a sorting table is established. The space where the first preset area in the sorting table is located is marked as target area one, and the space where the last preset area is located is marked as target area two; wherein, the sorting method is that the smaller the distance from the feed port, the higher the sorting priority, and the target areas include target area one and target area two.

[0015] Preferably, the target area-based detection device installation includes:

[0016] Identify the spatial positions of the target area 1 and the target area 2, install cameras above the target area 1 and the target area 2; and install a weight detection device below the target area 1 and the target area 2.

[0017] Preferably, the step of obtaining the load information of the target area through the detection device includes:

[0018] The weight of the coal in the target area and the proportion of the coal to the surface area of ​​the target area are obtained by a detection device installed in the target area;

[0019] The weight of the coal in the target area is marked as YA in the order of marking. n The proportion of the target area coal to the target area surface area is marked as YB in the marking order. n; Where n represents the marking order;

[0020] The weight of the two coals in the target area is marked as RA in the order of recording n , the proportion of the target area's second coal to the target area's surface area is marked as RB in the order of recording n .

[0021] Preferably, obtaining the standard speed of the conveyor belt through load information includes:

[0022] When the target area is YA n or YB n When it is not 0, start the conveyor belt according to the recognition speed and record YA n and YB n The value of; wherein, the recognition speed is obtained by the weight of the coal;

[0023] When the conveyor starts, the target area RA is identified and recorded n and RB n The value of YA i -RA i When the value of is greater than the preset threshold, YA is extracted i+1 , YA i+2 , R.A. i+1 and RA i+2 The value of YA i+1 and RA i+1 and YA i+2 and RA i+2 Are they all equal? ​​If yes, send an early warning message of coal leakage to the control center; if no, dynamically adjust the conveyor belt to obtain the standard speed; where i is the recorded number of target areas, 1≤i≤n; the preset threshold is set by experience.

[0024] Preferably, the identification speed is obtained by the weight of the coal, including:

[0025] The current coal weight DT is obtained by a weight detection device installed in the coal storage area;

[0026] Obtain historical coal weight from the database, perform data cleaning on the historical coal weight to obtain a historical coal weight library, and extract the historical coal weight LT in the historical coal weight library m , and the historical coal weight LT m Corresponding historical standard speed LBV m ;

[0027] Based on the formula SV=(1+η×(DT-∑(LT m ) / m) / ∑(LT m ))×(∑(LBV m) / m) to calculate the recognition speed SV; where η is the proportional coefficient, m represents the number of historical coal weights in the historical coal weight library, and the summation range of the summation formula ∑ is [1, m].

[0028] Preferably, the data cleaning of the historical coal weight to obtain the historical coal weight library includes:

[0029] Obtain historical coal weights and establish weight groups; obtain the variance of the weight groups and determine whether the variance is less than a set value; if so, establish a historical coal weight library based on the weight group data; if not, remove the number with the largest absolute value of the difference between the weight group and the mode, recalculate the variance, and when the variance is less than a set value, establish a historical coal weight library based on the weight group data; wherein the set value is obtained through experience.

[0030] Preferably, the dynamically adjusting the conveyor belt to obtain a standard speed comprises:

[0031] Judgment YA i+1 -RA i+1 Is the value greater than the preset threshold? If yes, get YA i -RA i , YA i+1 -RA i+1 with YA i+2 -RA i+2 The average PA i , and YA i , YA i+1 with YA i+2 The average PYA i ; Get YB i -RB i , YB i+1 -RB i+1 With YB i+2 -RB i+2 The average PB i , and YB i , YB i+1 With YB i+2 The average value of PYB i ; The standard speed BV is obtained by calculating the identification speed SV. The specific calculation method is: BV = (1-σ×arctan(PA i / (PYA i ))×sin(PB i +δ / (PYB i )))×SV; where σ is the proportionality coefficient and δ is the area adjustment coefficient obtained through experience;

[0032] No, mark the identified speed as standard speed.

[0033] Preferably, the stepwise operation of the conveyor belt based on the standard speed to obtain the speed instruction comprises:

[0034] When the first standard speed BV1 is obtained, set BV1 to the running speed of the conveyor belt. When YA appears again j -RA j When the value of is greater than the preset threshold, get YA i to YA j The maximum value of ZYA ij , and YA j The value of

[0035] Judgment YA j Is it smaller than ZYA? ij ; Yes, issue speed instruction one; No, issue speed instruction two; wherein the speed instruction includes speed instruction one and speed instruction two.

[0036] Preferably, the controlling the conveyor belt based on the speed instruction includes:

[0037] When the system recognizes speed instruction one, it runs the conveyor belt at the original speed and sends an abnormality signal to the control center;

[0038] When the system recognizes speed instruction 2, it dynamically readjusts the conveyor belt to obtain the next standard speed.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention sets up a target area, obtains load information based on the target area, obtains the standard speed and speed instruction of the conveyor belt through the load information, and controls the conveyor belt based on the speed instruction, thereby solving the technical problems of high cost of conveyor belt speed detection and difficulty in dynamically adjusting the speed of the conveyor belt according to the amount of coal during operation. It is beneficial to reduce the cost of conveyor belt monitoring and improve the real-time performance of conveyor belt speed control.

[0041] 2. When controlling the speed of the conveyor belt, the present invention takes into account that the non-uniformity of the feed at the conveyor belt feed port may cause the conveyor belt to require different operating speeds in different time periods. Therefore, the present invention can monitor the amount of coal on the conveyor belt in real time after obtaining the first standard speed through the speed instruction, and then update the operating speed of the conveyor belt in real time. This is conducive to reducing the energy consumption caused by the conveyor belt always maintaining a high-speed operating state. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the system module of the present invention;

[0044] Figure 2 It is a schematic diagram of the operation steps of the present invention;

[0045] Figure 3 It is a schematic diagram of the operation steps of obtaining the standard speed of the conveyor belt through load information of the present invention. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1-Figure 3 , the first aspect of the present invention provides a conveyor belt speed control system for coal flow detection, including: a conveyor identification module, and a planning module, a speed control module and a database connected thereto;

[0048] Planning module: used to extract target data, divide the conveyor belt into target areas based on the target data, and install detection devices based on the target areas; wherein the target data includes the length of the conveyor belt and the angle between the conveyor belt and the horizontal line; the detection device includes a camera and a weight detector;

[0049] Transmission identification module: used to obtain the load information of the target area through the detection device; wherein the load information includes the load weight and the load volume;

[0050] Speed ​​control module: used to obtain load information, and obtain the standard speed of the conveyor belt through the load information; based on the standard speed, the conveyor belt is operated step by step to obtain the speed instruction; based on the speed instruction, the conveyor belt is controlled;

[0051] Database: used to store data.

[0052] In this application, the conveyor belt is divided into target areas based on the target data, including:

[0053] Extract the length L of the conveyor belt, perform 3D modeling on the horizontally placed conveyor belt, simulate the result of the 3D modeling, divide the conveyor belt evenly into several areas, and mark the length of the area as the standard length BL;

[0054] The angle α between the conveyor belt and the horizontal line is extracted, and the preset length ML is obtained by calculating the standard length BL and the angle α. The specific calculation method is: ML = (1-β×arctan(α / 90°))×BL; wherein β is the proportionality coefficient;

[0055] The conveyor belt is evenly divided into L / ML preset areas based on the preset length ML, the preset areas are sorted according to the distance from the feed port, and a sorting table is established. The space where the first preset area in the sorting table is located is marked as target area one, and the space where the last preset area is located is marked as target area two; wherein, the sorting method is that the smaller the distance from the feed port, the higher the sorting priority, and the target areas include target area one and target area two.

[0056] It should be noted that the target area established by this system is divided according to the spatial position and will not change with the operation of the conveyor belt. The target area 1 represents a spatial area from the conveyor belt feed port as the boundary starting point to the boundary stopping point ML long from the feed port.

[0057] For example: at the moment when the conveyor belt is running, the weight of the coal in the current target area one is marked as YA1, and the proportion of the coal in target area one to the surface area of ​​the target area is marked as YB1. At this time, as the conveyor belt runs, the coal material in target area one is also changing. When the conveyor belt runs a distance of ML, the weight of the coal in target area one at this time is marked as YA2, and the proportion of the coal in target area one to the surface area of ​​the target area is marked as YB2. Similarly, target area two represents a spatial area from the conveyor belt discharge port as the boundary starting point to the boundary stopping point ML long from the discharge port. The identification of target area two is turned on at the moment the conveyor belt runs. When the conveyor belt runs L / ML-1 preset areas, the current weight of the coal in target area two is marked as RA1, and the proportion of the target area two coal to the surface area of ​​the target area is marked as RB1. As the conveyor belt runs, the coal in target area two is also changing. When the conveyor belt runs a distance of ML, the weight of the coal in target area two at this time is marked as RA2, and the proportion of the target area two coal to the surface area of ​​the target area is marked as RB2.

[0058] It should be noted that the spatial positions of target area 1 and target area 2 are both on the conveyor belt.

[0059] In this application, the detection device is installed based on the target area, including:

[0060] Identify the spatial positions of the target area 1 and the target area 2, install cameras above the target area 1 and the target area 2; and install a weight detection device below the target area 1 and the target area 2.

[0061] It should be noted that the camera installed in the target area in this step is mainly used to obtain the image of the coal occupying the target area, and then use image recognition technology to obtain the proportion of the coal occupying the surface area of ​​the target area for subsequent calculations.

[0062] In this application, the load information of the target area is obtained by the detection device, including:

[0063] The weight of the coal in the target area and the proportion of the coal to the surface area of ​​the target area are obtained by a detection device installed in the target area;

[0064] Mark the weight of coal in the target area as YA in the order of marking n , the proportion of the target area coal to the target area surface area is marked as YB in the marking order n ; Where n represents the marking order;

[0065] Mark the weight of the second coal in the target area as RA in the order of recording n , the proportion of the target area's second coal to the target area's surface area is marked as RB in the order of record n .

[0066] It should be noted that the YA established in Target Area 1 and Target Area 2 n , YB n , R.A. n , RB n This is to better distinguish the values ​​of weight and area ratio in different areas to facilitate subsequent calculations.

[0067] In this application, the standard speed of the conveyor belt is obtained through load information, including:

[0068] When the target area is YA n or YB n When it is not 0, start the conveyor belt according to the recognition speed and record YA n and YB n The value of; wherein, the recognition speed is obtained by the weight of the coal;

[0069] When the conveyor starts, the target area RA is identified and recorded n and RB n The value of YA i -RA i When the value of is greater than the preset threshold, YA is extracted i+1 , YA i+2 , R.A. i+1 and RAi+2 The value of YA i+1 and RA i+1 and YA i+2 and RA i+2 Are they all equal? ​​If yes, send an early warning message of coal leakage to the control center; if no, dynamically adjust the conveyor belt to obtain the standard speed; where i is the recorded number of target areas, 1≤i≤n; the preset threshold is set by experience.

[0070] It should be noted that during the operation of the conveyor belt, when the weight of the coal in the target area YA n Or the proportion of coal to the surface area of ​​the target area YB n When it is not 0, the conveyor belt is started. When the weight of coal in the target area YA n and the proportion of coal to the surface area of ​​the target area YB n When the conveyor belt is 0, the timing stops. When the target area 2 is at n+1, the conveyor belt stops running. By dynamically adjusting the running status of the conveyor belt according to the objects on the conveyor belt, the energy consumption caused by the empty conveyor belt can be reduced.

[0071] It should be noted that during the conveyor belt stop timing, as long as there is YA in the target area n or YB n If it is not 0, the current conveyor belt will be terminated and the timing will be stopped until the next target area appears. n and YB n When it reaches 0, continue to enter the conveyor belt and stop the timing.

[0072] In this application, the identification speed is obtained by the weight of the coal, including:

[0073] The current coal weight DT is obtained by a weight detection device installed in the coal storage area;

[0074] Obtain historical coal weight from the database, perform data cleaning on the historical coal weight to obtain a historical coal weight library, and extract the historical coal weight LT in the historical coal weight library m , and the historical coal weight LT m Corresponding historical standard speed LBV m ;

[0075] Based on the formula SV=(1+η×(DT-∑(LT m ) / m) / ∑(LT m ))×(∑(LBV m ) / m) to calculate the recognition speed SV; where η is the proportional coefficient, m represents the number of historical coal weights in the historical coal weight library, and the summation range of the summation formula ∑ is [1, m].

[0076] It is worth noting that the current required coal conveying speed can be roughly calculated through the historical coal weight and the corresponding historical standard speed. In subsequent calculations, when the identification speed does not meet the requirements, the conveyor belt can be dynamically adjusted to obtain the standard speed.

[0077] In this application, the historical coal weight is cleaned to obtain a historical coal weight library, including:

[0078] Obtain historical coal weights and establish weight groups; obtain the variance of the weight groups and determine whether the variance is less than a set value; if so, establish a historical coal weight library based on the weight group data; if not, remove the number with the largest absolute value of the difference between the weight group and the mode, recalculate the variance, and when the variance is less than a set value, establish a historical coal weight library based on the weight group data; wherein the set value is obtained through experience.

[0079] In this application, the conveyor belt is dynamically adjusted to obtain a standard speed, including:

[0080] Judgment YA i+1 -RA i+1 Is the value greater than the preset threshold? If yes, get YA i -RA i , YA i+1 -RA i+1 with YA i+2 -RA i+2 The average PA i , and YA i , YA i+1 with YA i+2 The average PYA i ; Get YB i -RB i , YB i+1 -RB i+1 With YB i+2 -RB i+2 The average PB i , and YB i , YB i+1 With YB i+2 The average value of PYB i ; The standard speed BV is obtained by calculating the identification speed SV. The specific calculation method is: BV = (1-σ×arctan(PA i / (PYA i ))×sin(PB i +δ / (PYB i )))×SV; where σ is the proportionality coefficient and δ is the area adjustment coefficient obtained through experience;

[0081] No, mark the identified speed as standard speed.

[0082] It should be noted that the average value PA obtained in this step is i It is calculated after two judgments. When the value of YAi-RAi is greater than the preset threshold and YA i+1 -RA i+1 When the value of is greater than the preset threshold, the obtained YA i -RA i , YA i+1 -RA i+1 They are all greater than 0, so they will not cause the average value PA i and the average PYA i When the value is 0, arctan(PA) will not appear in the formula for calculating the standard speed BV. i / (PYA i )) is 0.

[0083] It should be noted that when YA i+1 -RA i+1 When the value is not greater than the preset threshold, it proves that the coal has slipped in the i-th area, but most of the slipped coal has been fixed in the i+1-th area and will not affect the subsequent areas, so continue to use the recognition speed for the conveyor belt.

[0084] In this application, the conveyor belt is operated step by step based on the standard speed to obtain the speed instruction, including:

[0085] When the first standard speed BV1 is obtained, set BV1 to the running speed of the conveyor belt. When YA appears again j -RA j When the value of is greater than the preset threshold, get YA i to YA j The maximum value of ZYA ij , and YA j The value of

[0086] Judgment YA j Is it smaller than ZYA? ij ; Yes, issue speed instruction one; No, issue speed instruction two; wherein the speed instruction includes speed instruction one and speed instruction two.

[0087] It should be noted that, due to the unevenness of the feeding at the conveyor belt inlet, the conveyor belt may need different running speeds in different time periods. After obtaining the first standard speed, this step can monitor the amount of coal on the conveyor belt in real time and update the running speed of the conveyor belt in real time. This is conducive to reducing the energy consumption caused by the conveyor belt always maintaining a high-speed running state.

[0088] In this application, the conveyor belt is controlled based on the speed instruction, including:

[0089] When the system recognizes speed instruction one, it runs the conveyor belt at the original speed and sends an abnormality signal to the control center;

[0090] When the system recognizes speed instruction 2, it dynamically readjusts the conveyor belt to obtain the next standard speed.

[0091] Part of the data in the above formula is calculated by removing the dimension and taking its numerical value. The formula is a formula closest to the actual situation obtained by software simulation of a large amount of collected data; the preset parameters and preset thresholds in the formula are set by technical personnel in this field according to actual conditions or obtained through simulation of a large amount of data.

[0092] Working principle of the present invention:

[0093] Extract target data, divide the conveyor belt into target areas based on the target data, and install detection devices based on the target areas; obtain the weight of coal in the target area and the proportion of coal to the surface area of ​​the target area through the detection devices installed in the target area; mark the weight of coal in the target area as YA according to the marking order n , the proportion of the target area coal to the target area surface area is marked as YB in the marking order n ; When the target area is YA n or YB n When it is not 0, start the conveyor belt according to the recognition speed and record YA n and YB n When the conveyor belt starts, identify and record the target area RA n and RB n The value of YA i -RA i When the value of is greater than the preset threshold, YA is extracted i+1 , YA i+2 , R.A. i+1 and RA i+2 The value of YA i+1 and RA i+1 and YA i+2 and RA i+2 Are they all equal? ​​If yes, send an early warning message of coal leakage to the control center. If no, dynamically adjust the conveyor belt to obtain the standard speed. Based on the standard speed, run the conveyor belt in steps to obtain the speed command. Control the conveyor belt based on the speed command.

[0094] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A conveyor belt speed control system for coal flow detection, characterized in that: include: Transmission identification module, and the planning module, speed control module and database connected thereto; The planning module is used to extract target data, divide the conveyor belt into target areas based on the target data, and install the detection device based on the target area; wherein the target data includes the length of the conveyor belt and the angle between the conveyor belt and the horizontal line; The transmission identification module is used to obtain the load information of the target area through the detection device; wherein the load information includes the load weight and the load volume; The speed control module is used to obtain load information, obtain the standard speed of the conveyor belt through the load information; operate the conveyor belt in steps based on the standard speed to obtain speed instructions; and control the conveyor belt based on the speed instructions; The database is used to store data; The step of dividing the conveyor belt based on the target data to obtain the target area includes: Extract the length L of the conveyor belt, perform three-dimensional modeling on the horizontally placed conveyor belt, simulate the result of the three-dimensional modeling, divide the conveyor belt evenly into several areas, and mark the length of the area as the standard length BL; Extract the angle between the conveyor belt and the horizontal line , by the standard length BL and the angle Calculate the preset length ML. The specific calculation method is: ML=(1- ×arctan( / 90 ° ))×BL; where is the proportionality coefficient; The conveyor belt is evenly divided into L / ML preset areas based on the preset length ML, the preset areas are sorted according to the distance from the feed port, and a sorting table is established. The space where the first preset area in the sorting table is located is marked as target area one, and the space where the last preset area is located is marked as target area two; wherein, the sorting method is that the smaller the distance from the feed port, the higher the sorting priority, and the target areas include target area one and target area two.

2. A conveyor belt speed control system for coal flow detection according to claim 1, characterized in that: The target area-based detection device installation includes: Identify the spatial positions of the target area 1 and the target area 2, install cameras above the target area 1 and the target area 2; and install a weight detection device below the target area 1 and the target area 2.

3. A conveyor belt speed control system for coal flow detection according to claim 1, characterized in that: The step of obtaining the load information of the target area by using the detection device includes: The weight of the coal in the target area and the proportion of the coal to the surface area of ​​the target area are obtained by a detection device installed in the target area; The weight of the coal in the target area is marked as YA in the order of marking. n The proportion of the target area coal to the target area surface area is marked as YB in the marking order. n ; Where n represents the marking order; The weight of the two coals in the target area is marked as RA in the order of recording n , the proportion of the target area's second coal to the target area's surface area is marked as RB in the order of recording n .

4. A conveyor belt speed control system for coal flow detection according to claim 3, characterized in that: The method of obtaining the standard speed of the conveyor belt through load information includes: When the target area is YA n or YB n When it is not 0, start the conveyor belt according to the recognition speed and record YA n and YB n The value of; wherein, the recognition speed is obtained by the weight of the coal; When the conveyor starts, the target area RA is identified and recorded n and RB n The value of YA i -RA i When the value of is greater than the preset threshold, YA is extracted i+1 , YA i+2 , R.A. i+1 and RA i+2 The value of YA i+1 and RA i+1 and YA i+2 and RA i+2 Are they all equal? ​​If yes, send an early warning message of coal leakage to the control center; if no, dynamically adjust the conveyor belt to obtain the standard speed; where i is the recorded number of target areas, 1≤i≤n.

5. A conveyor belt speed control system for coal flow detection according to claim 4, characterized in that: The identification speed is obtained by the weight of the coal, including: The current coal weight DT is obtained by a weight detection device installed in the coal storage area; Obtain historical coal weight from the database, perform data cleaning on the historical coal weight to obtain a historical coal weight library, and extract the historical coal weight LT in the historical coal weight library m , and the historical coal weight LT m Corresponding historical standard speed LBV m ; Based on the formula SV=(1+ ×(DT-∑(LT m ) / m) / ∑(LT m ))×(∑(LBV m ) / m) to calculate the recognition speed SV; where, is the proportional coefficient, m represents the number of historical coal weights in the historical coal weight library, and the summation range of the summation formula ∑ is [1, m].

6. A conveyor belt speed control system for coal flow detection according to claim 5, characterized in that: The historical coal weight database is obtained by performing data cleaning on the historical coal weight, including: Obtain historical coal weights and establish weight groups; obtain the variance of the weight groups and determine whether the variance is less than the set value; if so, establish a historical coal weight library based on the weight group data; if not, remove the number with the largest absolute value of the difference between the weight group and the mode, recalculate the variance, and when the variance is less than the set value, establish a historical coal weight library based on the weight group data.

7. A conveyor belt speed control system for coal flow detection according to claim 4, characterized in that: The method of dynamically adjusting the conveyor belt to obtain a standard speed includes: Judgment YA i+1 -RA i+1 Is the value greater than the preset threshold? If yes, get YA i -RA i , YA i+1 -RA i+1 with YA i+2 -RA i+2 The average PA i , and YA i , YA i+1 with YA i+2 The average PYA i ; Get YB i -RB i , YB i+1 -RB i+1 With YB i+2 -RB i+2 The average PB i , and YB i , YB i+1 With YB i+2 The average value of PYB i ; The standard speed BV is obtained by calculating the recognition speed SV. The specific calculation method is: BV=(1- ×arctan(PA i / (PYA i ))×sin(PB i + / (PYB i )))×SV; where, is the proportionality coefficient, is the area adjustment coefficient obtained through experience; No, mark the identified speed as standard speed.

8. A conveyor belt speed control system for coal flow detection according to claim 7, characterized in that: The step-by-step operation of the conveyor belt based on the standard speed to obtain the speed instruction includes: When the first standard speed BV1 is obtained, set BV1 to the running speed of the conveyor belt. When YA appears again j -RA j When the value of is greater than the preset threshold, get YA i to YA j The maximum value of ZYA ij , and YA j The value of Judgment YA j Is it smaller than ZYA? ij ; Yes, issue speed instruction one; No, issue speed instruction two; wherein the speed instruction includes speed instruction one and speed instruction two.

9. A conveyor belt speed control system for coal flow detection according to claim 8, characterized in that: The control of the conveyor belt based on the speed instruction includes: When the system recognizes speed instruction one, it runs the conveyor belt at the original speed and sends an abnormality signal to the control center; When the system recognizes speed instruction 2, it dynamically readjusts the conveyor belt to obtain the next standard speed.

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