Belt conveyor flow detection method, system and device

Abstract

This invention discloses a method, system, and apparatus for detecting the flow rate of a belt conveyor, relating to the field of belt conveyor flow rate detection. The method includes: obtaining the radius of the material cross-section; constructing an equation for the circle containing the material cross-section based on the radius of the material cross-section; calculating the first and second contact points of the circles containing the material cross-section and the belt cross-section based on the equations of the two circles; calculating the area of ​​the material cross-section based on the center and radius of the circles containing the material cross-section and the belt cross-section, the first contact point, and the second contact point; and calculating the real-time material flow rate of the belt conveyor based on the area of ​​the material cross-section and the conveying speed of the belt conveyor. This invention achieves the goal of real-time monitoring of the belt conveyor system, minimizes the time required for real-time measurement of the material flow rate, and improves the operating efficiency of the belt conveyor system.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor flow detection, and in particular to a method, system and device for belt conveyor flow detection. Background Technology

[0002] As a primary piece of equipment for transporting materials, the safe and stable operation of belt conveyors is of great significance to the efficient and safe production of enterprises. If enterprises fail to consider the safe operation of belt conveyors while improving material transportation efficiency, it can create hidden dangers for the personal safety of workers. Therefore, the design and application of belt conveyor monitoring devices are crucial for the safety of both workers and equipment.

[0003] Although some companies have adopted integrated protection devices for belt conveyors, these devices have a relatively short application history, and some workers still lack a strong awareness of safe operation. Firstly, the conveyor's operating time should not be too long, but workers often allow the conveyor to run continuously for extended periods. This leads to high equipment temperatures, triggering over-temperature protection when the limit is reached. At this point, workers, unfamiliar with the protection device, may make many operational errors. Some companies, in pursuit of production efficiency, forcibly restart the protection device, ultimately reducing its sensitivity and rendering it ineffective in protecting the conveyor. Furthermore, integrated protection devices are generally expensive, and many companies, in an effort to reduce costs, choose inferior, lower-priced devices. These devices have short lifespans and frequently malfunction, rendering their protection ineffective.

[0004] The invention application CN104132699A claims "a laser scanning method for detecting the flow rate of bulk materials and eliminating distribution errors". However, this method requires too many measuring points to be arranged in the laser scanner, and the flow detection method is too complicated and the detection process is too cumbersome. It cannot guarantee the real-time performance and practicality of the flow detection of belt conveyors.

[0005] The invention application CN110648345A, entitled "A method and system for detecting the flow rate of tobacco material on a conveyor belt based on light field imaging," uses a detection system composed of a light field camera, a linear laser, a speed sensor, and an information processing computer to detect the flow rate of tobacco material on a conveyor belt. However, the detection device in this method is relatively simple and cannot guarantee the accuracy of the detection. Furthermore, the algorithm for calculating the flow rate is too complex and cannot guarantee the real-time performance of the detection process.

[0006] The invention application CN110766743A claims a "material flow detection method, device, equipment and medium based on image recognition". This method uses grayscale difference image information and the area of ​​the difference image region to calculate the material flow. It is less affected by ambient light, but the detection process and algorithm are relatively complicated and cannot guarantee the real-time performance of the detection. Furthermore, due to the relatively complex detection device, its practicality is not strong. Summary of the Invention

[0007] The purpose of this invention is to provide a method, system, and device for detecting the flow rate of a belt conveyor, which can shorten the time for real-time measurement of material flow rate and improve the operating efficiency of the belt conveyor system.

[0008] To achieve the above objectives, the present invention provides the following solution:

[0009] A method for detecting the flow rate of a belt conveyor, the method comprising:

[0010] Obtain the radius of the material cross-section and the conveying speed of the belt conveyor;

[0011] Based on the radius of the material's cross-section, construct the equation of the circle containing the material's cross-section;

[0012] Based on the equations of the circles containing the material cross-section and the belt cross-section, calculate the two intersection points of the circles containing the material cross-section and the belt cross-section, and use them as the first contact point and the second contact point, respectively.

[0013] Calculate the area of ​​the material cross-section based on the center and radius of the circle containing the material cross-section, the center and radius of the circle containing the belt cross-section, the first contact point, and the second contact point;

[0014] The real-time material flow rate of the belt conveyor is calculated based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor.

[0015] Optionally, the area of ​​the material cross-section is calculated based on the center and radius of the circle containing the material cross-section, the center and radius of the circle containing the belt cross-section, the first contact point, and the second contact point. Specifically, this includes:

[0016] Calculate the area of ​​the sector formed by the circle containing the belt cross-section, the first radius passing through the first contact point, and the second radius passing through the center of the material cross-section, and use this area as the first area; the first radius and the second radius are both radii of the circle containing the belt cross-section;

[0017] Calculate the area of ​​the sector formed by the circle containing the belt cross-section, the third radius passing through the second contact point, and the second radius passing through the center of the material cross-section, and use this area as the second area; the third radius is the radius of the circle containing the belt cross-section.

[0018] Calculate the area of ​​the triangle with the center of the circle containing the first contact point, the material cross-section, and the belt cross-section as its vertices to obtain the third area;

[0019] Calculate the area of ​​the triangle with the coordinates of the second contact point, the center of the circle containing the material cross-section, and the center of the circle containing the belt cross-section as its vertices to obtain the fourth area;

[0020] The fifth area is obtained by subtracting the first area from the third area;

[0021] The difference between the second area and the fourth area is used to obtain the sixth area;

[0022] Calculate the area of ​​the sector formed by the circle containing the material cross-section, the fourth radius passing through the first contact point, and the fifth radius passing through the second contact point, and use it as the seventh area;

[0023] Calculate the sum of the fifth area, the sixth area, and the seventh area, which is taken as the area of ​​the material cross-section.

[0024] Optionally, the real-time material flow rate of the belt conveyor is calculated based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor, specifically including:

[0025] The real-time material flow rate of the belt conveyor is obtained by multiplying the cross-sectional area of ​​the material by the conveying speed of the belt conveyor.

[0026] Optionally, by applying the belt conveyor flow detection method described above, the real-time material flow rate of the belt conveyor at multiple moments within a set time period is calculated. Based on the real-time material flow rate of the belt conveyor at multiple moments, the actual material flow rate of the belt conveyor is calculated, specifically including:

[0027] The actual material flow rate of the belt conveyor is obtained by summing and averaging the real-time material flow rates at multiple moments, using the following formula:

[0028]

[0029] Among them, Q a Q1 represents the actual material flow rate of the belt conveyor; Q2 represents the real-time material flow rate of the belt conveyor at time 1; Q3 represents the real-time material flow rate of the belt conveyor at time 2; Q4 represents the real-time material flow rate of the belt conveyor at time 3; Q5 represents the actual material flow rate of the belt conveyor at time 3. n Let be the real-time material flow rate of the belt conveyor at time n.

[0030] A belt conveyor flow detection system is provided, wherein the belt conveyor flow detection system is applied to the belt conveyor flow detection method described above, and the belt conveyor flow detection system comprises:

[0031] The acquisition module is used to obtain the radius of the material cross-section;

[0032] The first calculation module is used to construct the equation of the circle containing the material cross-section based on the radius of the material cross-section;

[0033] The second calculation module is used to calculate two intersection points of the circles containing the material cross-section and the belt cross-section based on the equations of the circles containing the material cross-section and the belt cross-section, and to use them as the first contact point and the second contact point, respectively.

[0034] The third calculation module is used to calculate the area of ​​the material cross section based on the center and radius of the circle containing the material cross section, the center and radius of the circle containing the belt cross section, the first contact point, and the second contact point.

[0035] The fourth calculation module is used to calculate the real-time material flow rate of the belt conveyor based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor.

[0036] A belt conveyor flow detection device is provided, which is applied to the belt conveyor flow detection method described above. The belt conveyor flow detection device includes: a first laser rangefinder, a second laser rangefinder, a third laser rangefinder, and a controller.

[0037] The first laser rangefinder, the second laser rangefinder, and the third laser rangefinder are sequentially installed above the belt conveyor;

[0038] The controller is connected to the first laser rangefinder, the second laser rangefinder, and the third laser rangefinder, respectively.

[0039] Optionally, the belt conveyor flow detection device further includes: a height-adjustable bracket;

[0040] An adjustable-height bracket spans both sides of the belt conveyor;

[0041] The first laser rangefinder, the second laser rangefinder, and the third laser rangefinder are sequentially mounted on an adjustable-height bracket; the second laser rangefinder is located on the vertical centerline of the belt conveyor; the first laser rangefinder and the third laser rangefinder are located on either side of the second laser rangefinder, and the distance between the first laser rangefinder and the second laser rangefinder is the same as the distance between the third laser rangefinder and the second laser rangefinder.

[0042] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the belt conveyor flow detection method described above.

[0043] A computer-readable storage medium storing a computer program that, when executed, implements the belt conveyor flow detection method described above.

[0044] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0045] This invention provides a method, system, and apparatus for detecting the flow rate of a belt conveyor. The method includes: obtaining the radius of the material cross-section; constructing an equation for the circle containing the material cross-section based on the radius of the material cross-section; calculating a first contact point and a second contact point between the circles containing the material cross-section and the belt cross-section based on the equations of the two circles; obtaining two contact points by calculating the equations of the circles containing the material cross-section and the belt cross-section; calculating the area of ​​the material cross-section based on the center and radius of the circles containing the material cross-section and the belt cross-section, as well as the first and second contact points; and calculating the real-time material flow rate of the belt conveyor based on the area of ​​the material cross-section and the conveying speed of the belt conveyor. Calculating only the area of ​​the material cross-section significantly reduces the computational complexity, achieving the goal of real-time monitoring of the belt conveyor system, minimizing the time required for real-time measurement of the material flow rate, and improving the operating efficiency of the belt conveyor system. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a flowchart of a belt conveyor flow detection method according to an embodiment of the present invention;

[0048] Figure 2 This is a schematic cross-sectional view of a belt conveyor flow detection method according to an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of a belt conveyor flow detection method according to an embodiment of the present invention.

[0050] Symbol explanation:

[0051] L1, first laser rangefinder; L2, second laser rangefinder; L3, third laser rangefinder. Detailed Implementation

[0052] 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, and 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.

[0053] The purpose of this invention is to provide a method, system, and device for detecting the flow rate of a belt conveyor. By calculating only the cross-sectional area of ​​the material, the calculation difficulty can be greatly reduced, thereby achieving the goal of real-time monitoring of the belt conveyor system. This minimizes the time required for real-time measurement of the material flow rate and improves the operating efficiency of the belt conveyor system.

[0054] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Example 1

[0056] like Figure 1 As shown, this embodiment of the invention provides a method for detecting the flow rate of a belt conveyor, including:

[0057] Step 101: Obtain the radius of the material cross-section.

[0058] In practice, multiple laser rangefinders can be set up to measure the lengths of multiple material cross-sections, and the average of these lengths can be taken as the radius of the material cross-section. Within each measurement cycle of the multiple laser rangefinders, all measured distances are collected and stored, and the measurement cycle can be adjusted according to the required measurement accuracy.

[0059] Step 102: Based on the radius of the material cross-section, construct the equation of the circle containing the material cross-section.

[0060] like Figure 2 As shown, in the specific implementation, at time t0, the radius of the circle containing the arc AB formed by the material accumulation is set as r, and the radius r is measured by three laser rangefinders and the average value is taken. The lengths of OC, OD, and OE are measured by the first laser rangefinder L1, the second laser rangefinder L2, and the third laser rangefinder L3, respectively. The specific formula is as follows:

[0061]

[0062] The equation of the circle containing arc AB is X.2 +Y 2 =r 2 .

[0063] like Figure 2 As shown, the arc PQ represents a simplified cross-sectional view of the belt conveyor, and the radius R and center M(X) of the circle containing the belt are known. M Y M Point O is the vertex at the bottom of arc PQ; the equation of the circle containing arc PQ is (XX). M ) 2 +(YY M ) 2 =R 2 .

[0064] Step 103: Based on the equations of the circles containing the material cross-section and the belt cross-section, calculate the two intersection points of the circles containing the material cross-section and the belt cross-section, and use them as the first contact point and the second contact point, respectively.

[0065] In specific implementation, such as Figure 2 As shown, according to the equation of the circle containing arc PQ (XX) M ) 2 +(YY M ) 2 =R 2 The equation of the circle containing arc AB is X. 2 +Y 2 =r 2 Find the coordinates (X, Y) of the first contact point A and the second contact point B of the two circles. A Y A ), (X B Y B If ), then the length of OA is

[0066] Step 104: Calculate the area of ​​the material cross-section based on the center and radius of the circle containing the material cross-section, the center and radius of the circle containing the belt cross-section, the first contact point, and the second contact point.

[0067] Step 105: Calculate the real-time material flow rate of the belt conveyor based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor.

[0068] Specifically, based on the center and radius of the circle containing the material cross-section, the center and radius of the circle containing the belt cross-section, the first contact point, and the second contact point, the area of ​​the material cross-section is calculated, including:

[0069] Calculate the area of ​​the sector formed by the circle containing the belt cross-section, the first radius passing through the first contact point, and the second radius passing through the center of the material cross-section, and use this area as the first area; the first radius and the second radius are both radii of the circle containing the belt cross-section.

[0070] Calculate the area of ​​the sector formed by the circle containing the belt cross-section, the third radius passing through the second contact point, and the second radius passing through the center of the material cross-section, and use this area as the second area; the third radius is the radius of the circle containing the belt cross-section.

[0071] Calculate the area of ​​the triangle with the center of the circle containing the first contact point, the material cross-section, and the belt cross-section as its vertices to obtain the third area.

[0072] Calculate the area of ​​the triangle with the coordinates of the second contact point, the center of the circle containing the material cross-section, and the center of the circle containing the belt cross-section as its vertices to obtain the fourth area.

[0073] The fifth area is obtained by subtracting the first area from the third area.

[0074] The sixth area is obtained by subtracting the second area from the fourth area.

[0075] Calculate the area of ​​the sector formed by the circle containing the material cross-section, the fourth radius passing through the first contact point, and the fifth radius passing through the second contact point, and use this area as the seventh area.

[0076] Calculate the sum of the fifth, sixth, and seventh areas to obtain the area of ​​the material cross-section.

[0077] In specific implementation, such as Figure 2 As shown, draw a perpendicular line from point M to OA, with the foot of the perpendicular at point F. Then the length of AF is half the length of OA, i.e.

[0078]

[0079] Find the cosine value of ∠MAO, then use the cosine value to calculate the degree measure of ∠MAO and convert it to a radian value, denoted as α, where ∠MOA=∠MAO. The specific formula is as follows:

[0080]

[0081]

[0082]

[0083] In triangle MAF, ∠AMF = 90° - ∠MAO. Similarly, using the angle-to-radian conversion formula, the angle of ∠AMF is converted to radians and denoted as β. The area of ​​sector MAO is denoted as the first area S1, and the specific calculation formula is as follows:

[0084]

[0085] Let the area of ​​the arc AO be denoted as the fifth area S5, and the area of ​​the triangle MAO be denoted as S3. Then S5 = S1 - S3.

[0086] Let the area of ​​the sector MBO be the second area S2, such as Figure 2 Triangles MAO and MBO are congruent, therefore ∠AMF = ∠BMG = β. Thus, the second area S² is calculated using the following formula:

[0087]

[0088] Let the area of ​​segment BO be denoted as the fifth area S6, and the area of ​​triangle MBO be denoted as S4. Then S 6＝ S2-S4.

[0089] Let the area of ​​sector AOB be the seventh area S7, and similarly, The cross-sectional area of ​​the material accumulation is denoted as S8, and the cross-sectional area of ​​the material accumulation is denoted as S8 = S5 + S6 + S7.

[0090] In practice, the above steps can be repeated after a set time to obtain the material cross-sectional area S9 at time t1. Then, the average cross-sectional area of ​​the material accumulation on the belt conveyor within the specified time is:

[0091]

[0092] The real-time material flow rate of the belt conveyor is calculated based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor, specifically including:

[0093] Multiplying the cross-sectional area of ​​the material by the conveyor speed of the belt conveyor yields the real-time material flow rate of the belt conveyor. The formula is:

[0094] Q = SV;

[0095] Where Q is the real-time material flow rate of the belt conveyor; S is the cross-sectional area of ​​the material; and V is the conveying speed of the belt conveyor.

[0096] The real-time material flow rate of the belt conveyor at multiple moments within a set time period is calculated using the above method. Based on the real-time material flow rate of the belt conveyor at multiple moments, the actual material flow rate of the belt conveyor is calculated, specifically including:

[0097] like Figure 3 As shown, the actual material flow rate of the belt conveyor is obtained by summing and averaging the real-time material flow rates at multiple moments. The formula is:

[0098]

[0099] Among them, Q a Q1 represents the actual material flow rate of the belt conveyor; Q2 represents the real-time material flow rate of the belt conveyor at time 1; Q3 represents the real-time material flow rate of the belt conveyor at time 2; Q4 represents the real-time material flow rate of the belt conveyor at time 3; Q5 represents the actual material flow rate of the belt conveyor at time 3. n Let be the real-time material flow rate of the belt conveyor at time n.

[0100] Example 2

[0101] This invention provides a belt conveyor flow detection system, which is applied to the belt conveyor flow detection method in Embodiment 1. The belt conveyor flow detection system includes:

[0102] The acquisition module is used to acquire the radius of the material cross-section and the conveying speed of the belt conveyor.

[0103] The first calculation module is used to construct the equation of the circle containing the material cross-section based on the radius of the material cross-section.

[0104] The second calculation module is used to calculate two intersection points of the circles containing the material cross-section and the belt cross-section based on the equations of the circles containing the material cross-section and the belt cross-section, and to use these intersection points as the first contact point and the second contact point, respectively.

[0105] The third calculation module is used to calculate the area of ​​the material cross-section based on the center and radius of the circle containing the material cross-section, the center and radius of the circle containing the belt cross-section, the first contact point, and the second contact point.

[0106] The fourth calculation module is used to calculate the real-time material flow rate of the belt conveyor based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor.

[0107] Example 3

[0108] This invention provides a belt conveyor flow detection device, which is applied to the belt conveyor flow detection method in Embodiment 1. The belt conveyor flow detection device includes: a first laser rangefinder L1, a second laser rangefinder L2, a third laser rangefinder L3, and a controller.

[0109] The first laser rangefinder L1, the second laser rangefinder L2, and the third laser rangefinder L3 are installed sequentially above the belt conveyor.

[0110] The controller is connected to the first laser rangefinder L1, the second laser rangefinder L2, and the third laser rangefinder L3, respectively.

[0111] The belt conveyor flow detection device also includes an adjustable-height bracket. This bracket spans the belt conveyor and is fixed by a base. Both the vertical bracket and the horizontal bracket containing the rangefinder have graduations for adjusting the height and horizontal distance.

[0112] The first laser rangefinder L1, the second laser rangefinder L2, and the third laser rangefinder L3 are sequentially mounted on an adjustable-height bracket; the second laser rangefinder L2 is located on the vertical center line of the belt conveyor; the first laser rangefinder L1 and the third laser rangefinder L3 are located on both sides of the second laser rangefinder L2, and the distance between the first laser rangefinder L1 and the third laser rangefinder L3 is the same as the distance between the third laser rangefinder L3 and the second laser rangefinder L2.

[0113] like Figure 2 As shown, first, assemble all laser rangefinders as follows: Figure 2 As shown, the laser rangefinders are arranged in a specific manner and numbered sequentially from left to right as follows: first laser rangefinder L1, second laser rangefinder L2, and third laser rangefinder L3. These three rangefinders are at the same horizontal height, and the line connecting first and third laser rangefinders L1 and point O forms a 45° angle with the line connecting second laser rangefinder L2 and point O, i.e., ∠L1OL2=∠L2OL. 3＝ 45°. The height-adjustable bracket is equipped with rollers for adjusting the height of the horizontal support; on the horizontal support, the distance between all rangefinders can be adjusted via the rollers. A plumb line is attached to the second laser rangefinder L2 on the horizontal support, ensuring that the position of the second laser rangefinder L2 fixed on the horizontal support is on the same vertical line as the lowest point O of the belt conveyor, i.e., L2O⊥X-axis.

[0114] In the specific measurement, the position of the second laser rangefinder L2 fixed on the horizontal support is on the same vertical line as the lowest point O of the belt conveyor. The distance d1 between the first laser rangefinder L1 and the second laser rangefinder L2 is the same as the distance d2 from the second laser rangefinder L2 to point O. Furthermore, the second laser rangefinder L2 is located at the midpoint of the line connecting the first laser rangefinder L1 and the third laser rangefinder L3.

[0115] d1 = d2;

[0116] L1L3=2L1L2=2L2L3.

[0117] In one embodiment, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the belt conveyor flow detection method of embodiment 1.

[0118] In one embodiment, the present invention also provides a computer-readable storage medium storing a computer program that, when executed, implements the method of the belt conveyor flow detection device in Embodiment 1.

[0119] The purpose of this invention is to overcome the problems of excessive measuring points, complex algorithms, and long data processing times in existing belt conveyor measurement methods, which fail to meet real-time requirements. This invention provides a method for arranging laser rangefinders and detecting flow rate on belt conveyors. The arrangement is rationally designed, the principle is simple, the flow measurement cost is low, and the measurement results are highly reliable. This method facilitates comprehensive and effective measurement of belt conveyor flow rate and can also detect the distribution and changes of materials on the belt conveyor in real time, improving the efficiency of detecting the belt conveyor's operating status.

[0120] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0121] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for detecting the flow rate of a belt conveyor, characterized in that, The belt conveyor flow detection method includes: Obtain the radius of the material cross-section and the conveying speed of the belt conveyor; Based on the radius of the material's cross-section, construct the equation of the circle containing the material's cross-section; Based on the equations of the circles containing the material cross-section and the belt cross-section, calculate the two intersection points of the circles containing the material cross-section and the belt cross-section, and use them as the first contact point and the second contact point, respectively. Calculate the area of ​​the material cross-section based on the center and radius of the circle containing the material cross-section, the center and radius of the circle containing the belt cross-section, the first contact point, and the second contact point; The real-time material flow rate of the belt conveyor is calculated based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor.

2. The method for detecting the flow rate of a belt conveyor according to claim 1, characterized in that, Based on the center and radius of the circle containing the material cross-section, the center and radius of the circle containing the belt cross-section, the first contact point, and the second contact point, the area of ​​the material cross-section is calculated, specifically including: Calculate the area of ​​the sector formed by the circle containing the belt cross-section, the first radius passing through the first contact point, and the second radius passing through the center of the material cross-section, and use this area as the first area; the first radius and the second radius are both radii of the circle containing the belt cross-section; Calculate the area of ​​the sector formed by the circle containing the belt cross-section, the third radius passing through the second contact point, and the second radius passing through the center of the material cross-section, and use this area as the second area; the third radius is the radius of the circle containing the belt cross-section. Calculate the area of ​​the triangle with the center of the circle containing the first contact point, the material cross-section, and the belt cross-section as its vertices to obtain the third area; Calculate the area of ​​the triangle with the center of the circle containing the second contact point, the material cross-section, and the belt cross-section as its vertices to obtain the fourth area; The fifth area is obtained by subtracting the first area from the third area; The difference between the second area and the fourth area is used to obtain the sixth area; Calculate the area of ​​the sector formed by the circle containing the material cross-section, the fourth radius passing through the first contact point, and the fifth radius passing through the second contact point, and use this area as the seventh area; the fourth radius and the fifth radius are both radii of the circle containing the material cross-section; Calculate the sum of the fifth area, the sixth area, and the seventh area, which is taken as the area of ​​the material cross-section.

3. The method for detecting the flow rate of a belt conveyor according to claim 1, characterized in that, The real-time material flow rate of the belt conveyor is calculated based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor, specifically including: The real-time material flow rate of the belt conveyor is obtained by multiplying the cross-sectional area of ​​the material by the conveying speed of the belt conveyor.

4. The method for detecting the flow rate of a belt conveyor according to any one of claims 1-3, characterized in that, Calculate the real-time material flow rate of the belt conveyor at multiple moments within a set time period, and calculate the actual material flow rate of the belt conveyor based on the real-time material flow rate at multiple moments, specifically including: The actual material flow rate of the belt conveyor is obtained by summing and averaging the real-time material flow rates at multiple moments, using the following formula: Among them, Q a Q1 represents the actual material flow rate of the belt conveyor; Q2 represents the real-time material flow rate of the belt conveyor at time 1; Q3 represents the real-time material flow rate of the belt conveyor at time 2; Q4 represents the real-time material flow rate of the belt conveyor at time 3; Q5 represents the actual material flow rate of the belt conveyor at time 3. n Let be the real-time material flow rate of the belt conveyor at time n.

5. A belt conveyor flow detection system, characterized in that, The belt conveyor flow detection system is applied to any one of claims 1-4, and the belt conveyor flow detection system includes: The acquisition module is used to acquire the radius of the material cross-section and the conveying speed of the belt conveyor; The first calculation module is used to construct the equation of the circle containing the material cross-section based on the radius of the material cross-section; The second calculation module is used to calculate two intersection points of the circles containing the material cross-section and the belt cross-section based on the equations of the circles containing the material cross-section and the belt cross-section, and to use them as the first contact point and the second contact point, respectively. The third calculation module is used to calculate the area of ​​the material cross section based on the center and radius of the circle containing the material cross section, the center and radius of the circle containing the belt cross section, the first contact point, and the second contact point. The fourth calculation module is used to calculate the real-time material flow rate of the belt conveyor based on the cross-sectional area of ​​the material and the conveying speed of the belt conveyor.

6. A flow rate detection device for a belt conveyor, characterized in that, The belt conveyor flow detection device is applied to any one of claims 1-4, and the belt conveyor flow detection device includes: a first laser rangefinder, a second laser rangefinder, a third laser rangefinder, and a controller; The first laser rangefinder, the second laser rangefinder, and the third laser rangefinder are sequentially installed above the belt conveyor; The controller is connected to the first laser rangefinder, the second laser rangefinder, and the third laser rangefinder, respectively.

7. The belt conveyor flow detection device according to claim 6, characterized in that, The belt conveyor flow detection device further includes: an adjustable height bracket; An adjustable-height bracket spans both sides of the belt conveyor; The first laser rangefinder, the second laser rangefinder, and the third laser rangefinder are sequentially mounted on an adjustable-height bracket; the second laser rangefinder is located on the vertical centerline of the belt conveyor; the first laser rangefinder and the third laser rangefinder are located on either side of the second laser rangefinder, and the distance between the first laser rangefinder and the second laser rangefinder is the same as the distance between the third laser rangefinder and the second laser rangefinder.

8. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as described in any one of claims 1 to 4.

9. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed, implements the method as described in any one of claims 1 to 4.

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