A belt speed control system and method

Abstract

This invention discloses a belt conveyor speed control system and method. The system includes a control module, a conveyor belt, and a depth camera. The conveyor belt includes a speed control belt and at least one coal mining belt. The coal mining belt overlaps with the speed control belt, and a depth camera is installed at a monitoring point on each coal mining belt. The depth camera is used to acquire coal quantity data on the coal mining belt. The control module is communicatively connected to the depth camera. The control module is used to obtain the predicted flow rate at the coal drop point at the overlap of the coal mining belt and the speed control belt based on the coal quantity data corresponding to the coal mining belt, select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the operating speed of the speed control belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed control belt. The technical solution provided by this invention achieves energy saving of the speed control belt based on operating conditions.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of coal quantity control technology, and in particular to a belt speed regulation system and method. Background Technology

[0002] In existing coal mines, the underground roadways are often quite long, requiring the mined coal to be transported over long distances. Multiple conveyor belts are also used in conjunction with each other. However, the variable-speed conveyor belts are not always fully loaded, and the amount of coal mined by the coal mining machine at the working face varies. In current technology, the variable-speed conveyor belts maintain a constant operating speed and cannot control the belt speed according to the amount of coal mined. This results in a significant waste of energy consumption by the variable-speed conveyor belts, causing huge losses to the enterprise. Summary of the Invention

[0003] This invention provides a belt speed regulation system and method that saves power consumption of the speed regulation belt according to the operating conditions.

[0004] In a first aspect, embodiments of the present invention provide a belt speed control system, comprising: a control module, a transport belt, and a depth camera;

[0005] The conveyor belt includes a speed-regulating belt and at least one coal mining belt; the coal mining belt overlaps with the speed-regulating belt, and the coal mining belt is used to transport coal to the speed-regulating belt.

[0006] A depth camera is installed at each monitoring point of the coal mining conveyor belt; the depth camera is used to acquire coal quantity data on the coal mining conveyor belt.

[0007] The control module is communicatively connected to the depth camera; the control module is used to obtain the predicted flow rate of the coal drop point at the junction of the coal mining belt and the speed regulating belt according to the coal quantity data corresponding to the coal mining belt, and select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the running speed of the speed regulating belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt.

[0008] Optionally, the speed control system further includes a segmentation module; the control module includes a first calculation unit, a second calculation unit, a third calculation unit, and an adjustment unit; the coal quantity data includes the operating speed and real-time flow rate of the coal mining conveyor belt;

[0009] The segmentation module is connected to the control module, and the segmentation module is used to divide the coal-carrying section of the coal mining belt between the monitoring point and the coal drop point to obtain segmented intervals;

[0010] The first calculation unit is used to obtain the coal load corresponding to the segmented interval based on the operating speed of the coal mining belt, the real-time flow rate, and the segmented interval;

[0011] The second calculation unit is used to calculate the predicted flow rate of each segment at the coal drop point based on the operating speed of each of the coal mining belts and the coal load of the corresponding segment.

[0012] The third calculation unit is used to select the maximum value in the predicted flow rate and determine the operating speed of the speed regulating belt based on the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt.

[0013] The adjustment unit is used to adjust the speed according to the determined running speed of the speed regulating belt.

[0014] Optionally, the control module further includes a fourth computing unit and a fifth computing unit;

[0015] The fourth calculation unit is used to calculate the actual flow rate of the coal drop point corresponding to each segment based on the operating speed of the coal conveyor belt and the coal load of the segmented interval;

[0016] The fifth calculation unit is used to calculate the total coal load of the speed regulating belt based on the actual flow rate at the coal drop point and the operating speed of the speed regulating belt.

[0017] The regulating unit is also used to adjust the running speed of the speed regulating belt according to the total coal load.

[0018] Optionally, the travel time from the monitoring point to the coal drop point corresponding to the coal mining conveyor belt is greater than the acceleration time of the speed regulating belt from the first speed to the high speed to the second speed, wherein the first speed is less than the second speed.

[0019] Secondly, embodiments of the present invention provide a belt speed regulation method, including:

[0020] Receive coal quantity data from monitoring points on the coal mining conveyor belt;

[0021] The predicted flow rate of the coal drop point at the junction of the coal mining belt and the speed regulating belt is obtained based on the coal quantity data corresponding to the coal mining belt.

[0022] Select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the running speed of the speed regulating belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt.

[0023] Optionally, the coal quantity data includes the operating speed and real-time flow rate of the coal mining conveyor belt;

[0024] Based on the coal quantity data corresponding to the coal conveyor belt, the predicted flow rate at the coal drop point at the junction of the coal conveyor belt and the speed regulating belt is obtained, including:

[0025] The coal-carrying section of the coal conveyor belt between the monitoring point and the coal drop point is divided into segmented intervals.

[0026] The coal load of the corresponding segment is obtained based on the operating speed of the coal conveyor belt, the real-time flow rate, and the segmented interval.

[0027] The predicted flow rate of each of the coal mining belts at the coal drop point is calculated based on the operating speed of each belt and the coal load of the corresponding segment.

[0028] Optionally, after adjusting the operating speed of the speed regulating belt based on the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt, the method further includes:

[0029] The actual flow rate of each coal drop point corresponding to each segment is calculated based on the operating speed of the coal conveyor belt and the coal load of each segment.

[0030] The total coal load of the speed-regulating belt is calculated based on the actual flow rate at the coal drop point and the operating speed of the speed-regulating belt.

[0031] The operating speed of the speed regulating belt is adjusted according to the total coal load.

[0032] Optionally, adjusting the operating speed of the speed regulating belt based on the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt includes:

[0033] Determine the percentage ratio of the maximum value in the predicted flow rate to the rated flow rate of the speed control belt;

[0034] Adjust the rated speed of the speed regulating belt to the operating speed corresponding to the percentage ratio.

[0035] Optionally, at least three operating speed levels are set, wherein the operating speed corresponding to each operating speed level increases sequentially; each operating speed level corresponds to a percentage ratio range;

[0036] Adjusting the rated speed of the speed regulating belt to the operating speed corresponding to the percentage ratio includes:

[0037] Based on the percentage ratio range into which the percentage ratio falls, adjust the rated speed of the speed regulating belt to the operating speed gear corresponding to the percentage ratio range.

[0038] Optionally, when the speed regulating belt needs to accelerate, it can be directly adjusted to the target operating speed gear; when the speed regulating belt needs to decelerate, it decelerates in stages, and a preset interval time is set between each downshift.

[0039] The technical solution provided by this invention is based on coal quantity data collected by a depth camera. The predicted flow rate at the coal drop point on the speed-regulating belt is obtained through a control module. The change in coal quantity is obtained based on the predicted flow rate. Therefore, the speed of the speed-regulating belt is adjusted according to the change in coal quantity, that is, the transport capacity of the speed-regulating belt is controlled. When the coal quantity is high, the transport capacity can be increased, and when the coal quantity is low, the transport capacity can be reduced. Thus, the operating speed of the belt is controlled according to the coal quantity, saving the operating power consumption of the speed-regulating belt. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a belt speed regulation system provided in an embodiment of the present invention.

[0041] Figure 2 This is a schematic flowchart of a belt speed regulation method provided in an embodiment of the present invention.

[0042] Figure 3 This is a schematic flowchart of another belt speed regulation method provided in an embodiment of the present invention.

[0043] Figure 4 This is a schematic flowchart of another belt speed regulation method provided in an embodiment of the present invention. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Figure 1 This invention provides a schematic diagram of a belt speed control system according to an embodiment of the invention. (See attached diagram.) Figure 1 It includes: a control module 110, a conveyor belt, and a depth camera 120;

[0046] The conveyor belt includes a speed-regulating belt 130 and at least one coal mining belt 140; the coal mining belt 140 overlaps with the speed-regulating belt 130, and the coal mining belt 140 is used to transport coal to the speed-regulating belt 130.

[0047] A depth camera 120 is installed at each monitoring point 150 of each coal mining conveyor belt 140; the depth camera 120 is used to acquire coal quantity data on the coal mining conveyor belt 140.

[0048] The control module 110 is communicatively connected to the depth camera 120. The control module 110 is used to obtain the predicted flow rate of the coal drop point 160 at the junction of the coal mining belt 140 and the speed regulating belt 130 based on the coal quantity data corresponding to the coal quantity data of the coal mining belt 140. The control module 110 selects the maximum value of the predicted flow rate corresponding to the coal drop point 160 and adjusts the running speed of the speed regulating belt 130 according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt 130.

[0049] Specifically, the coal mining conveyor belt 140 is connected to the speed-regulating conveyor belt 130. The speed-regulating conveyor belt 130 is the main conveyor belt for transporting coal. Typically, the speed-regulating conveyor belt 130 has a long transport distance, and multiple coal drop points 160 can be set on it. Each coal drop point 160 can correspond to a coal mining conveyor belt 140. After the coal mining machine mines the coal, it transports the coal to the coal mining conveyor belt 140, and then the coal is output from the coal mining conveyor belt 140 to the coal drop point 160, and finally transported to the target location by the speed-regulating conveyor belt 130. A depth camera 120 corresponds one-to-one with the coal mining conveyor belt 140. The depth camera 120 is installed on the corresponding monitoring point 150 of the coal mining conveyor belt 140. The depth camera 120 captures images of the coal mining conveyor belt 140 to obtain the coal quantity data corresponding to the coal mining conveyor belt 140. For example, the depth camera 120 can acquire the distance information of the object being photographed. Compared to traditional two-dimensional planar cameras, the three-dimensional camera provides additional depth data. Therefore, in subsequent data processing, the amount of coal transported on the conveyor belt can be obtained based on the depth data and the width of the coal seam on the conveyor belt 140. For example, the volume is calculated by multiplying the bottom area of ​​the conveyor belt 140 by its height as the amount of coal transported.

[0050] The control module 110 obtains the predicted flow rate of the corresponding coal drop point 160 based on the coal quantity data corresponding to the coal conveyor belt 140. For example, the control module 110 can calculate the real-time flow rate of each coal conveyor belt 140 based on the coal load transported on the coal conveyor belt 140 and the operating speed of the coal conveyor belt 140. Since the monitoring point 150 is a certain distance from the coal drop point 160, the real-time flow rate of the coal conveyor belt 140 can reflect the predicted flow rate of the corresponding coal drop point 160. In order to avoid coal piling up on the speed-regulating belt 130, the requirement is met by ensuring that the operating speed of the speed-regulating belt 130 meets the maximum predicted flow rate. Therefore, the maximum value of the predicted flow rate corresponding to each coal drop point 160 is selected, and the operating speed of the speed-regulating belt 130 is adjusted according to the relationship between the maximum value of the predicted flow rate and the rated flow rate of the speed-regulating belt 130. For example, if the maximum value in the predicted flow is equal to the rated flow of the speed regulating belt 130, then the speed regulating belt 130 will run at full speed. If the maximum value in the predicted flow is less than the rated flow of the speed regulating belt 130, then the adjustment percentage can be determined based on the ratio of the predicted flow to the rated flow, and then the speed regulating belt 130 can be adjusted to the rated speed percentage.

[0051] The technical solution provided by this invention is based on coal quantity data collected by a depth camera. The predicted flow rate at the coal drop point on the speed-regulating belt is obtained through a control module. The change in coal quantity is obtained based on the predicted flow rate. Therefore, the speed of the speed-regulating belt is adjusted according to the change in coal quantity, that is, the transport capacity of the speed-regulating belt is controlled. When the coal quantity is high, the transport capacity can be increased, and when the coal quantity is low, the transport capacity can be reduced. Thus, the operating speed of the belt is controlled according to the coal quantity, saving the operating power consumption of the speed-regulating belt.

[0052] Optionally, the speed control system also includes a segmented module; the control module 110 includes a first calculation unit, a second calculation unit, a third calculation unit, and an adjustment unit; the coal quantity data includes the operating speed and real-time flow of the coal mining conveyor belt 140;

[0053] The segmentation module is connected to the control module 110. The segmentation module is used to divide the coal-carrying conveyor belt 140 between the monitoring point 150 and the coal drop point 160 into segmented intervals 210.

[0054] The first calculation unit is used to obtain the coal load of the corresponding segment 210 based on the operating speed, real-time flow rate and segment interval of the coal mining belt 140.

[0055] The second calculation unit is used to calculate the predicted flow rate of each segment 210 at the coal drop point 160 based on the operating speed of each coal mining belt 140 and the coal load of the corresponding segment 210.

[0056] The third calculation unit is used to select the maximum value in the predicted flow rate and determine the running speed of the speed regulating belt 130 based on the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt 130.

[0057] The regulating unit is used to adjust the speed according to the determined running speed of the speed regulating belt 130.

[0058] Specifically, for ease of explanation, for example, two coal mining belts 140 are preset, with the X direction being the transport direction of the speed-regulating belt 130. The first coal drop point 161 of the first coal mining belt 141 and the second coal drop point 162 of the second coal mining belt 142 do not coincide.

[0059] The coal load between the first monitoring point 151 and the first coal drop point 161 of the first coal conveyor belt 141 is segmented. That is, the coal load on the coal conveyor belt 140 at the first monitoring point 151 is taken as the starting point. After running for a period of time, this segment becomes the first segment interval 210, and the recording of the second segment interval 210 begins, and so on. When the first segment interval 210 reaches the coal drop point 160, N segment intervals 210 can be divided between the first monitoring point 151 and the first coal drop point 161. Similarly, the coal load between the second monitoring point 152 and the second coal drop point 162 of the second coal conveyor belt 142 is segmented to obtain N segment intervals 210.

[0060] The first calculation unit can calculate the coal load of each segment 210 on the first coal mining belt 141 by using the operating speed of the first coal mining belt 141, the real-time flow rate of the first coal mining belt 141, and the range of each segment 210. Similarly, the coal load of each segment 210 on the second coal mining belt 142 can be calculated by using the operating speed of the second coal mining belt 142, the real-time flow rate of the second coal mining belt 142, and the range of each segment 210.

[0061] Therefore, by dividing the coal load of the coal conveyor belt 140 into segments, the second calculation unit can obtain the real-time flow rate of each segment 210 based on the coal load of each segment 210 on the first coal conveyor belt 141 and the operating speed of the first coal conveyor belt 141. At the first coal drop point 161, the second calculation unit can obtain the corresponding predicted flow rate for each segment 210. Similarly, based on the coal load of each segment 210 on the second coal conveyor belt 142 and the operating speed of the second coal conveyor belt 142, the second calculation unit can obtain the real-time flow rate of each segment 210 and the predicted flow rate of each segment 210 at the second coal drop point 162.

[0062] The third calculation unit selects the maximum predicted flow rate of the segmented interval 210 between the first coal mining belt 141 and the second coal mining belt 142. Based on the relationship between the maximum predicted flow rate and the rated flow rate of the speed regulating belt 130, the operating speed of the speed regulating belt 130 is adjusted. For example, if the maximum predicted flow rate is equal to the rated flow rate of the speed regulating belt 130, the speed regulating belt 130 runs at full speed. If the maximum predicted flow rate is less than the rated flow rate of the speed regulating belt 130, the rated speed percentage of the speed regulating belt 130 can be adjusted according to the percentage of the predicted flow rate to the rated flow rate. By dividing the coal mining belt 140 into segments, the maximum predicted flow rate corresponding to the segmented interval 210 can be used for judgment, avoiding the back-and-forth speed fluctuations of the speed regulating belt 130 caused by real-time changes in the coal load between the monitoring point 150 and the coal drop point 160, thus reducing the wear and tear on the speed regulating belt 130 motor and frequency converter.

[0063] Optionally, the control module 110 may also include a fourth computing unit and a fifth computing unit;

[0064] The fourth calculation unit is used to calculate the actual flow rate of the coal drop point corresponding to each segment based on the operating speed of the coal conveyor belt and the coal load of the segmented interval;

[0065] The fifth calculation unit is used to calculate the total coal load of the speed regulating belt based on the actual flow rate at the coal drop point and the operating speed of the speed regulating belt.

[0066] The regulating unit is also used to adjust the running speed of the speed regulating belt according to the total coal load.

[0067] Specifically, in combination Figure 1 The fourth calculation unit calculates the actual flow rate of the coal drop point 160 corresponding to each segment 210 based on the operating speed and real-time flow rate of the coal conveyor belt 140 and the coal load of the segment 210.

[0068] Since the second coal drop point 162 is to the right of the first coal drop point 161, the second coal drop point 162 serves as a coupling point, meaning that the coal from the first coal mining belt 141 and the second coal mining belt 142 overlaps at this coupling point as the speed-regulating belt 130 operates. The fifth calculation unit calculates the total coal load of the speed-regulating belt 130 based on the actual flow rates of the first and second coal drop points 161 and the operating speed of the speed-regulating belt 130. The total coal load is compared with the preset maximum coal load of the speed-regulating belt 130, which is determined based on the rated coal load of the speed-regulating belt 130. The rated coal load is determined by the rated flow rate, rated speed, and length of the speed-regulating belt 130. For example, if the total coal load exceeds the preset maximum coal load, to prevent the speed-regulating belt 130 from jamming or leaking coal, it can be adjusted to full speed. Once the total coal load reaches a safe level, it can exit full speed. At this point, the operating speed of the speed regulating belt 130 can be determined based on the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt 130.

[0069] Optionally, the running time from the monitoring point 150 to the coal drop point 160 corresponding to the coal mining belt 140 is greater than the acceleration time of the speed regulating belt 130 from the first speed to the high speed to the second speed, wherein the first speed is less than the second speed.

[0070] Specifically, when the speed regulating belt 130 accelerates, it indicates that the conveying capacity of the speed regulating belt 130 is insufficient and it is being accelerated for adjustment. However, it takes a certain acceleration time to accelerate from the first speed to the second speed. In order to prevent coal from falling into the coal mining belt 140 when the conveying capacity of the speed regulating belt 130 is insufficient, which would cause belt compression and coal leakage, the running time from the monitoring point 150 of the coal mining belt 140 to the coal drop point 160 needs to be greater than the acceleration time to ensure that no coal falls into the speed regulating belt 130 during the acceleration process.

[0071] Figure 2 This is a flowchart illustrating a belt speed regulation method according to an embodiment of the present invention. This embodiment is applicable to the speed regulation of coal conveyor belts. The method can be executed by a belt speed regulation system, which can be implemented in hardware and / or software. The method specifically includes the following steps:

[0072] S110, Receive coal quantity data from monitoring points on the coal mining conveyor belt;

[0073] Specifically, the coal mining conveyor belt 140 is connected to the speed-regulating conveyor belt 130. The speed-regulating conveyor belt 130 is the main conveyor belt for transporting coal. Typically, the speed-regulating conveyor belt 130 transports a long distance, and multiple coal drop points 160 can be set on it. Each coal drop point 160 can correspond to a coal mining conveyor belt 140. After the coal mining machine mines the coal, it transports the coal to the coal mining conveyor belt 140, and then the coal is output from the coal mining conveyor belt 140 to the coal drop point 160, and finally transported to the target location by the speed-regulating conveyor belt 130. A depth camera 120 corresponds one-to-one with the coal mining conveyor belt 140. The depth camera 120 is installed at the corresponding monitoring point 150 on the coal mining conveyor belt 140. The depth camera 120 captures images of the coal mining conveyor belt 140 to obtain the coal quantity data corresponding to the coal mining conveyor belt 140. For example, the depth camera 120 can acquire the distance information of the object being photographed. Compared to traditional two-dimensional planar cameras, the three-dimensional camera provides additional depth data. Therefore, in subsequent data processing, the amount of coal transported on the conveyor belt can be obtained based on the depth data and the width of the coal seam on the 140mm conveyor belt.

[0074] S120. Obtain the predicted flow rate at the coal drop point at the junction of the coal mining belt and the speed regulating belt based on the coal quantity data corresponding to the coal mining belt.

[0075] Specifically, based on the amount of coal transported on the coal conveyor belt 140 and the operating speed of the coal conveyor belt 140, the real-time flow rate of each coal conveyor belt 140 can be calculated. Since the monitoring point 150 is a certain distance from the coal drop point 160, the real-time flow rate of the coal conveyor belt 140 can reflect the predicted flow rate of the corresponding coal drop point 160.

[0076] S130. Select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the running speed of the speed regulating belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt.

[0077] Specifically, to prevent coal from piling up on the speed-regulating belt 130, ensuring that the belt meets the maximum predicted flow rate is sufficient. Therefore, the maximum predicted flow rate corresponding to each coal drop point 160 is selected. Based on the relationship between the maximum predicted flow rate and the rated flow rate of the speed-regulating belt 130, the operating speed of the belt is adjusted. For example, if the maximum predicted flow rate equals the rated flow rate of the speed-regulating belt 130, the belt will operate at full speed. If the maximum predicted flow rate is less than the rated flow rate, the adjustment percentage can be determined based on the ratio of the predicted flow rate to the rated flow rate, thus adjusting the speed-regulating belt 130 to a percentage of its rated speed.

[0078] Figure 3 This is a flowchart illustrating another belt speed regulation method provided in an embodiment of the present invention, combined with... Figure 1 See Figure 3 The methods include:

[0079] S210, Receive coal quantity data from monitoring points on the coal mining conveyor belt;

[0080] S220. Divide the coal-carrying section of the coal conveyor belt between the monitoring point and the coal drop point to obtain segmented intervals;

[0081] Specifically, two coal mining conveyor belts 140 are preset, with the X-direction being the transport direction of the speed-regulating conveyor belt 130. The first coal drop point 161 of the first coal mining conveyor belt 141 and the second coal drop point 162 of the second coal mining conveyor belt 142 do not coincide. The coal load between the first monitoring point 151 and the first coal drop point 161 of the first coal mining conveyor belt 141 is segmented. That is, the coal load on the coal mining conveyor belt 140 at the first monitoring point 151 is taken as the starting point. After running for a period of time, this segment is taken as the first segment interval 210, and the recording of the second segment interval 210 begins, and so on. When the first segment interval 210 reaches the coal drop point 160, N segment intervals 210 can be divided between the first monitoring point 151 and the first coal drop point 161. Similarly, the coal load between the second monitoring point 152 and the second coal drop point 160 of the second coal mining conveyor belt 142 is segmented to obtain N segment intervals 210.

[0082] S230. Obtain the coal load of the corresponding segment based on the operating speed of the coal mining belt, real-time flow rate, and segment interval.

[0083] Specifically, the coal load of each segment 210 on the first coal mining belt 141 can be calculated by using the operating speed of the first coal mining belt 141, the real-time flow rate of the coal mining belt 140, and the range of each segment 210. Similarly, the coal load of each segment 210 on the second coal mining belt 142 can be calculated by using the operating speed of the second coal mining belt 142, the real-time flow rate of the coal mining belt 140, and the range of each segment 210.

[0084] S240. Calculate the predicted flow rate at the coal drop point for each segment based on the operating speed of each coal conveyor belt and the coal load of the corresponding segment.

[0085] Therefore, after dividing the coal load of the first coal mining belt 140 into segments, the real-time flow rate of each segment 210 can be obtained based on the coal load of each segment 210 on the first coal mining belt 141 and the operating speed of the first coal mining belt 141. Thus, at the coal drop point 160, the corresponding predicted flow rate can be obtained for each segment 210. Similarly, based on the coal load of each segment 210 on the second coal mining belt 142 and the operating speed of the second coal mining belt 142, the real-time flow rate and the predicted flow rate of each segment 210 can be obtained.

[0086] S250. Select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the running speed of the speed regulating belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt.

[0087] Specifically, the maximum predicted flow rate of the segmented interval 210 between the first coal mining belt 141 and the second coal mining belt 142 is selected. Based on the relationship between the maximum predicted flow rate and the rated flow rate of the speed-regulating belt 130, the operating speed of the speed-regulating belt 130 is adjusted. For example, if the maximum predicted flow rate equals the rated flow rate of the speed-regulating belt 130, the speed-regulating belt 130 operates at full speed. If the maximum predicted flow rate is less than the rated flow rate, the rated speed of the speed-regulating belt 130 is adjusted by the percentage of the predicted flow rate to the rated flow rate. By segmenting the coal mining belt 140, the maximum predicted flow rate corresponding to the segmented interval 210 is used for judgment, avoiding real-time changes in the coal load between monitoring point 150 and coal drop point 160 that cause the speed of the speed-regulating belt 130 to fluctuate, thus reducing wear on the speed-regulating belt 130 motor and frequency converter.

[0088] Figure 4 This is a flowchart illustrating another belt speed regulation method provided in an embodiment of the present invention, combined with... Figure 1 See Figure 4 The methods include:

[0089] S310, Receive coal quantity data from monitoring points on the coal mining conveyor belt;

[0090] S320. Divide the coal-carrying section of the coal conveyor belt between the monitoring point and the coal drop point to obtain segmented intervals;

[0091] S330. Obtain the coal load of the corresponding segment based on the operating speed of the coal mining belt, real-time flow rate, and segment interval.

[0092] S340. Calculate the predicted flow rate at the coal drop point for each segment based on the operating speed of each coal conveyor belt and the coal load of the corresponding segment.

[0093] S350. Select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the running speed of the speed regulating belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt.

[0094] S360. Calculate the actual flow rate of the coal drop point corresponding to each segment based on the operating speed of the coal conveyor belt and the coal load of each segment.

[0095] S370. Calculate the total coal load of the speed regulating belt based on the actual flow rate at the coal drop point and the operating speed of the speed regulating belt.

[0096] Specifically, since the second coal drop point 162 is located to the right of the first coal drop point 161, the second coal drop point 162 serves as a coupling point. That is, the coal from the first coal mining belt 141 and the second coal mining belt 142 is superimposed at this coupling point as the speed-regulating belt 130 operates. Based on the actual flow rate of the first coal drop point 161 and the actual flow rate of the second coal drop point 162, combined with the operating speed of the speed-regulating belt 130, the total coal load already on the speed-regulating belt 130 can be obtained.

[0097] S380, Adjust the running speed of the speed belt according to the total coal load.

[0098] Specifically, the total coal load is compared with the preset maximum coal load of the speed-regulating belt 130. The preset maximum coal load is determined based on the rated coal load of the speed-regulating belt 130, which is determined by the rated flow rate, rated speed, and length of the speed-regulating belt 130. For example, if the total coal load exceeds the preset maximum coal load, to prevent the speed-regulating belt 130 from jamming or leaking coal, it can be adjusted to full speed. Once the total coal load reaches a safe level, it can be switched off from full speed. At this point, the operating speed of the speed-regulating belt 130 can be determined based on the maximum predicted flow rate and the rated flow rate of the speed-regulating belt 130.

[0099] Based on the above embodiments, optionally, adjusting the operating speed of the speed regulating belt 130 according to the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt 130 includes:

[0100] Determine the percentage ratio of the maximum value in the predicted flow rate to the rated flow rate of the speed control belt 130;

[0101] Adjust the rated speed of the speed regulating belt 130 to the operating speed corresponding to the percentage ratio.

[0102] Specifically, adjusting the speed based on the maximum value in the predicted flow rate can avoid problems such as belt compression and coal piling at the maximum value. Therefore, by comparing the maximum value in the predicted flow rate with the rated flow rate of the speed-regulating belt 130, the percentage of the maximum value in the predicted flow rate is determined, and the speed is adjusted according to the percentage value to adapt to the coal transport capacity falling into the coal drop point 160. To reduce the fluctuation of the percentage value, which could cause frequent fluctuations in the speed regulating equipment, at least three operating speed levels can be set, where the operating speed corresponding to each operating speed level increases sequentially; each operating speed level corresponds to a percentage ratio range; adjusting the rated speed of the speed-regulating belt 130 to the operating speed corresponding to the percentage ratio range includes: adjusting the rated speed of the speed-regulating belt 130 to the operating speed level corresponding to the percentage ratio range according to the percentage ratio range it falls into.

[0103] In other words, for example, three speed levels are set: high, medium, and low. Each speed level corresponds to a set of percentage ratio ranges. Based on the percentage ratio of the maximum value in the predicted flow rate to the rated flow rate of the speed regulating belt 130, it can be determined which set of percentage ratio range it falls into. Thus, it can be controlled according to the set speed level to prevent frequent speed adjustments from damaging the equipment.

[0104] Optionally, when the speed control belt 130 needs to accelerate, it can be directly adjusted to the target operating speed gear; when the speed control belt 130 needs to decelerate, it decelerates in stages, and a preset interval time is set between each downshift.

[0105] For example, if the speed-regulating belt 130 is currently operating at a low speed, and the predicted flow rate indicates that it needs to accelerate, with a target speed of high, then the belt can be directly adjusted to the high speed, i.e., the target speed, without needing to transition through a medium speed. The goal is to complete the acceleration as quickly as possible and avoid problems such as belt compression or coal spillage. Conversely, if the belt is currently operating at a high speed, but the predicted flow rate indicates that it can decelerate, with a target speed of low, then the belt needs to gradually decrease speed during control. Furthermore, after decreasing from high speed to medium speed, a preset time is required. During this time, the current data is used to determine if further deceleration is needed. If so, the belt should then be reduced to a low speed. This prevents the belt from continuing to decelerate during deceleration if the predicted flow rate or total coal load increases, which could lead to poor operating conditions.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A belt speed control system, characterized in that, include: Control module, conveyor belt, and depth camera; The conveyor belt includes a speed-regulating belt and multiple coal mining belts; the coal mining belts overlap with the speed-regulating belts, and the coal mining belts are used to transport coal to the speed-regulating belts. A depth camera is installed at each monitoring point of the coal mining conveyor belt; the depth camera is used to acquire coal quantity data on the coal mining conveyor belt. The control module is communicatively connected to the depth camera; the control module is used to obtain the predicted flow rate of the coal drop point at the junction of the coal mining belt and the speed regulating belt according to the coal quantity data corresponding to the coal mining belt, and select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the running speed of the speed regulating belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt. Wherein, the coal drop points at the joints of each of the coal mining belts and the speed regulating belts do not coincide; according to the running direction of the speed regulating belts, at least one of the coal drop points is a coal drop coupling point. The control module is also used to obtain the total coal load of the speed-regulating belt based on the actual flow rate of each coal drop point and the running speed of the speed-regulating belt, and to adjust the running speed of the speed-regulating belt according to the total coal load.

2. The belt speed regulating system according to claim 1, characterized in that, The speed control system also includes a segmented module; the control module includes a first calculation unit, a second calculation unit, a third calculation unit, and an adjustment unit; the coal quantity data includes the operating speed and real-time flow rate of the coal mining conveyor belt; The segmentation module is connected to the control module, and the segmentation module is used to divide the coal-carrying section of the coal mining belt between the monitoring point and the coal drop point to obtain segmented intervals; The first calculation unit is used to obtain the coal load corresponding to the segmented interval based on the operating speed of the coal mining belt, the real-time flow rate, and the segmented interval; The second calculation unit is used to calculate the predicted flow rate of each segment at the coal drop point based on the operating speed of each of the coal mining belts and the coal load of the corresponding segment. The third calculation unit is used to select the maximum value in the predicted flow rate and determine the operating speed of the speed regulating belt based on the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt. The adjustment unit is used to adjust the speed according to the determined running speed of the speed regulating belt.

3. The belt speed regulating system according to claim 2, characterized in that, The control module further includes a fourth computing unit and a fifth computing unit; The fourth calculation unit is used to calculate the actual flow rate of the coal drop point corresponding to each segment based on the operating speed of the coal conveyor belt and the coal load of the segmented interval; The fifth calculation unit is used to calculate the total coal load of the speed regulating belt based on the actual flow rate at the coal drop point and the operating speed of the speed regulating belt. The regulating unit is also used to adjust the running speed of the speed regulating belt according to the total coal load.

4. The belt speed regulating system according to claim 1, characterized in that, The travel time from the monitoring point to the coal drop point corresponding to the coal mining conveyor belt is greater than the acceleration time of the speed regulating conveyor belt from the first speed to the high speed to the second speed, wherein the first speed is less than the second speed.

5. A belt speed regulation method, characterized in that, include: Receives coal quantity data from multiple monitoring points on the coal mining conveyor belt; The predicted flow rate of the coal drop point at the junction of the coal mining belt and the speed regulating belt is obtained based on the coal quantity data corresponding to the coal mining belt. Select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the running speed of the speed regulating belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed regulating belt. Wherein, the coal drop points at the joints of each of the coal mining belts and the speed regulating belts do not coincide; according to the running direction of the speed regulating belts, at least one of the coal drop points is a coal drop coupling point. Based on the actual flow rate at each coal drop point and the operating speed of the speed-regulating belt, the total coal load of the speed-regulating belt can be obtained, and the operating speed of the speed-regulating belt can be adjusted according to the total coal load.

6. The belt speed regulation method according to claim 5, characterized in that: The coal quantity data includes the operating speed and real-time flow rate of the coal mining conveyor belt; Based on the coal quantity data corresponding to the coal conveyor belt, the predicted flow rate at the coal drop point at the junction of the coal conveyor belt and the speed regulating belt is obtained, including: The coal-carrying section of the coal conveyor belt between the monitoring point and the coal drop point is divided into segmented intervals. The coal load of the corresponding segment is obtained based on the operating speed of the coal conveyor belt, the real-time flow rate, and the segmented interval. The predicted flow rate of each of the coal mining belts at the coal drop point is calculated based on the operating speed of each belt and the coal load of the corresponding segment.

7. The belt speed regulation method according to claim 6, characterized in that, After adjusting the operating speed of the speed regulating belt based on the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt, the method further includes: The actual flow rate of each coal drop point corresponding to each segment is calculated based on the operating speed of the coal conveyor belt and the coal load of each segment. The total coal load of the speed-regulating belt is calculated based on the actual flow rate at the coal drop point and the operating speed of the speed-regulating belt. The operating speed of the speed regulating belt is adjusted according to the total coal load.

8. The belt speed regulation method according to any one of claims 5-7, characterized in that, Adjusting the operating speed of the speed regulating belt based on the maximum value in the predicted flow rate and the rated flow rate of the speed regulating belt includes: Determine the percentage ratio of the maximum value in the predicted flow rate to the rated flow rate of the speed control belt; Adjust the rated speed of the speed regulating belt to the operating speed corresponding to the percentage ratio.

9. The belt speed regulation method according to claim 8, characterized in that, At least three operating speed levels are set, wherein the operating speed corresponding to each operating speed level increases sequentially; each operating speed level corresponds to a percentage ratio range; Adjusting the rated speed of the speed regulating belt to the operating speed corresponding to the percentage ratio includes: Based on the percentage ratio range into which the percentage ratio falls, adjust the rated speed of the speed regulating belt to the operating speed gear corresponding to the percentage ratio range.

10. The belt speed regulation method according to claim 9, characterized in that, When the speed regulating belt needs to accelerate, it can be directly adjusted to the target operating speed gear; when the speed regulating belt needs to decelerate, it decelerates in stages, and a preset interval time is set between each downshift.

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