Belt deviation detection system and method

Abstract

The invention discloses a belt deviation detection system and method, and belongs to the technical field of belt detection. In order to solve the problems that an existing detection method cannot quantify the belt offset, is high in cost and is limited in large-scale application, the position information of the distance between the two sides of a belt and the belt distance measuring units is monitored in real time through the belt distance measuring units, the potential deviation risk is found in time, and the belt distance measuring units are installed on the two sides of the belt. A differential detection system is formed, the distances between the belt and the two sides can be detected, distance information is uploaded to a related main controller in a wireless communication mode, deviation operation information of the belt is obtained after calculation, and once the deviation operation information exceeds a deviation threshold value, the system gives out early warning and takes corresponding measures for processing. In this way, it can be guaranteed that the belt is in a good running state all the time, continuity and stability of coal transportation are guaranteed, and therefore the overall production efficiency and production safety of a coal mine are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of belt detection, and specifically relates to a system and method for detecting belt deviation. Background Art

[0002] The belt is a key component in the transportation system. Taking coal mine applications as an example, once belt deviation occurs in the complex environment of the coal mine underground, it may trigger a series of serious safety problems. On the one hand, belt deviation may cause the belt to rub against the frame, resulting in tearing, edge wear, or even breakage, triggering equipment failures. On the other hand, severe deviation may trigger material spillage, stacking, or mechanical collisions, which may entangle and rub against surrounding equipment, generating sparks. Since there are flammable and explosive gases such as gas in the coal mine underground, it is very likely to trigger catastrophic accidents such as explosions. By detecting belt deviation and tearing, it is possible to discover and take measures in the early stage of deviation, thereby avoiding the occurrence of these major safety accidents and ensuring the safety of underground workers and the safe production of coal mines.

[0003] In the prior art, the belt deviation detection mainly uses technical means such as mechanical contact detection, image recognition, photoelectric switches, and lasers. In the mechanical contact detection method, when the belt deviates, the physical contact sensors (such as deviation switches and limit rods) are used to detect the edge position of the belt. When the belt shifts and touches the mechanical device, the microswitch or travel switch is triggered to send an alarm or shutdown signal. This method has many disadvantages. It is only triggered when the belt deviation is serious, and it can only provide discrete signals, unable to quantify the offset of the belt and unable to achieve real-time process detection. For the belt deviation detection using image recognition, an industrial camera is used to capture the belt edge image in real time, and the belt position is analyzed through AI algorithms (such as edge detection and template matching) to calculate the deviation amount and direction. The cost is high and it cannot be applied on a large scale. In the actual application process, the on-site environment is harsh, and dust, water, sludge, etc. severely restrict the use of equipment such as cameras and lenses. The photoelectric switch and laser technologies have high precision, but high cost and are easily affected by dust, which are limited in large-scale applications. Summary of the Invention

[0004] Aiming at the problems that the existing detection methods cannot quantify the belt offset, have high cost, and are limited in large-scale applications, the present invention provides a system and method for detecting belt deviation.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A system for detecting belt deviation, the system includes a belt transportation support, belt rollers, a belt, anti-deviation limit posts, a fixing device for a wireless belt deviation detection device, a wireless belt deviation detection device, a wireless gateway, and a cloud platform;

[0007] A fixing device for a wireless belt deviation detection device is installed on the anti-deviation limit post to fix the wireless belt deviation detection device; the anti-deviation limit posts on both the left and right sides of the belt and the wireless belt deviation detection devices fixed on the anti-deviation limit posts together form a belt differential detection system, which can detect the running state of the belt in real time through the differential detection method;

[0008] The belt differential detection system uses a single-sided deployment or a simultaneous deployment on both the left and right sides for differential detection;

[0009] The wireless gateway is wirelessly connected to multiple wireless belt deviation detection devices and the cloud platform for communication;

[0010] The wireless gateway is used to receive the sensing data of the wireless belt deviation detection device or send a wake-up instruction to the wireless belt deviation detection device;

[0011] The wireless belt deviation detection device periodically sends or receives a wake-up signal from the wireless gateway and then sends data. The wireless belt deviation detection device collects the current angle data according to the timed wake-up instruction of the wireless gateway, and uploads the collected angle data to the wireless gateway in the form of a chain network using single-hop or multi-hop wireless communication methods;

[0012] The cloud platform comprehensively analyzes and judges the angle data uploaded by the wireless gateway.

[0013] The wireless belt deviation detection device includes a wireless communication unit, a belt distance measurement unit, an inclination signal detection unit, a power supply, a main controller, a wireless transmission circuit, and a housing;

[0014] The belt distance measurement unit is an ultrasonic ranging sensor, which is used to measure the position distance between the belt and the ultrasonic ranging sensor; the ultrasonic frequency range is: 40K~500KHz, and the ultrasonic excitation voltage range is: 5~350V;

[0015] The inclination signal detection unit is an attitude sensor, which is used to detect the inclination angle of the wireless belt deviation detection device;

[0016] The distance between the wireless belt deviation detection device and the belt edge is 0~50cm, and the installation position of the wireless belt deviation detection device is adjusted according to the thickness of the belt;

[0017] The wireless communication technology used by the wireless communication unit includes at least one of Bluetooth, RFID, Lora, NB-IoT, 4G, 5G, and XingShan;

[0018] The data coding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit, and a check bit.

[0019] The wireless gateway includes a wireless communication unit, a 4G / 5G communication module, an ETH Ethernet communication module, a power supply, a main controller, a wireless transmission circuit, and a housing;

[0020] The wireless communication technologies used by the wireless communication unit include at least one of Bluetooth, RFID, LoRa, NB-IoT, 4G, 5G, and XingShan;

[0021] The data encoding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit, and a check bit.

[0022] The wireless belt deviation detection device and the wireless gateway are respectively arranged in corresponding housings. The housing is made of polymer material, encapsulated with epoxy resin, and meets the IP65 protection level;

[0023] The wireless transmission circuit of the wireless belt deviation detection device or the wireless gateway uses a circuit board microstrip antenna and is respectively connected to its main controller through a feeder line.

[0024] The installation methods of the wireless belt deviation detection device and the wireless gateway are magnetic adsorption installation, fixed hole installation, and installation with matching structural parts; the device information and installation information of the wireless belt deviation detection device and the wireless gateway are printed on the surface of the housing in the form of two-dimensional codes and barcodes through a marking machine, and on-site scanning codes are used for installation deployment and configuration.

[0025] The fixing device of the wireless belt deviation detection device uses an auxiliary installation structure to install the wireless belt deviation detection device on the anti-deviation limit post.

[0026] A method for detecting belt deviation, the method is: when the belt moves on the belt idler, the wireless belt deviation detection devices installed on the left and right sides of the belt measure the position distance between the belt and the wireless belt deviation detection devices. When the distances between the belt and the wireless belt deviation detection devices on the left and right sides of the belt are equal, the belt is in the middle position. When the distances between the belt and the wireless belt deviation detection devices on the left and right sides of the belt are different, the belt is in a deviation state. The wireless belt deviation detection device sends the deviation signal of the belt to the cloud platform through wireless communication, and the cloud platform analyzes and judges the deviation signal;

[0027] When the belt touches the anti-deviation limit post and the anti-deviation limit post tilts, when the attitude sensor in the wireless belt deviation detection device detects that the attitude data of the anti-deviation limit post changes, the belt is deviated. The wireless belt deviation detection device transmits the deviation signal of the belt to the cloud platform through wireless communication, and the cloud platform analyzes and judges the deviation signal.

[0028] The working principle of the wireless belt deviation detection devices on the left and right sides of the belt is as follows:

[0029] The ultrasonic ranging sensor in the left - hand wireless belt deviation detection device generates ultrasonic signals. The ultrasonic waves propagate in the air and encounter the belt when the propagation time is . The ultrasonic signals are reflected and then propagate in the air again. When the propagation time is , the ultrasonic signals are detected by the ultrasonic ranging sensor. Then the distance between the left - hand wireless belt deviation detection device and the belt is calculated by the following formula:

[0030]

[0031] Where , is the time from the generation of the ultrasonic excitation to the detection by the ultrasonic ranging sensor, which is obtained by the main controller through timing. is the propagation speed of ultrasonic waves in the air, which is a physical constant, generally taken as: 343 m / s;

[0032] The ultrasonic ranging sensor in the right - hand wireless belt deviation detection device generates ultrasonic signals. The ultrasonic waves propagate in the air and encounter the belt when the propagation time is . The ultrasonic signals are reflected and then propagate in the air again. When the propagation time is , the ultrasonic signals are detected by the ultrasonic ranging sensor. Then the distance between the right - hand wireless belt deviation detection device and the belt is calculated by the following formula:

[0033]

[0034] Where , is the time from the generation of the ultrasonic excitation to the detection by the ultrasonic ranging sensor, which is obtained by the main controller through timing. is the propagation speed of ultrasonic waves in the air, which is a physical constant, generally taken as: 343 m / s;

[0035] Let be the belt width, be the distance between the left - hand wireless belt deviation detection device and the belt + the belt width + the distance between the right - hand wireless belt deviation detection device and the belt, which is a fixed value after installation. The formula is:

[0036]

[0037] The right - hand wireless belt deviation detection device and the left - hand wireless belt deviation detection device measure simultaneously and when one of the values changes, the other value changes accordingly. The wireless belt deviation detection device measures the and through the wireless communication unit and sends them to the cloud platform. The cloud platform measures the deviation amount and deviation rate by forming a differential signal from the data of two ultrasonic ranging sensors on the left and right sides. The calculation formula for the deviation amount is:

[0038]

[0039]

[0040]

[0041] wherein, and represent the belt deviation amount, and represent the distance between the belt and the wireless belt deviation detection device after the belt deviates;

[0042] Compare the belt deviation amounts on the left and right sides. When the deviation amounts on the left and right sides are equal, the belt deviates. When the deviation amounts on the left and right sides are different, the current deviation amount is invalid data.

[0043] The core of the working principle of the wireless belt deviation detection devices on both sides of the belt is: the wireless differential detection method of the belt, which respectively detects the real-time distances between the belt and the ultrasonic ranging sensors on the left and right sides. By the change of the distance on one side of the belt, the change amount of the distance on the other side of the belt is judged. Through the comparison of the two sets of measured distances, it is judged whether the belt deviates. If the measured distance of the other side sensor does not deviate or the change amount difference is large, it can be judged as false alarm or invalid data. The multi-data fusion judgment can improve the system stability and reduce the false alarm interference.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] The position information of the belt on both sides of the belt distance from the belt distance measurement unit is monitored in real time through the belt distance measurement unit, and potential deviation risks are found in time. The detection device installs belt distance measurement units on both sides of the belt to form a differential detection system, which can detect the distances on both sides of the belt. This distance information is uploaded to the relevant main controller through wireless communication, and the deviation operation information of the belt is obtained through calculation. Once the deviation threshold is exceeded, the system issues an early warning and takes corresponding measures for processing. This can ensure that the belt is always in a good operating state, guarantee the continuity and stability of coal transportation, and thus improve the overall production efficiency and production safety of the coal mine.

[0046] The present invention can detect the specific length of belt deviation. By using an ultrasonic ranging sensor to detect the distance between the belt edge and the wireless belt deviation detection device, the specific value of belt deviation can be detected in real time. At the same time, the wireless belt deviation detection device of the present invention can be deployed on one side or both sides of the belt.

[0047] The whole of the present invention is powered by battery or wireless power supply, and adopts a low-power design. A single battery / wireless power supply method can provide a working duration of not less than 3 years. The overall meets the IP65 protection level, and the design standard refers to the mine safety and coal safety designs. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the overall system of the present invention; wherein, belt transport support - 101, belt idler - 102, belt - 103, anti-deviation limit post - 104, fixing device for wireless belt deviation detection module - 105, wireless belt deviation detection module - 201;

[0049] Figure 2 It is a schematic diagram of the wireless belt deviation detection module; wherein, wireless communication unit - 202, belt distance measurement unit - 203, tilt signal detection unit - 204, power supply - 205, main controller - 206;

[0050] Figure 3 It is a schematic diagram of the wireless gateway module; wherein, wireless communication unit - 302, 4G / 5G unit - 303, ETH network port - 304, power supply - 305, main controller - 306;

[0051] Figure 4 It is a schematic diagram of the belt deviation detection method;

[0052] Figure 5 It is a schematic diagram of belt deviation amount detection. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0053] To understand the present invention in depth, we will describe it comprehensively and meticulously. However, the present invention has multiple implementation manners and is not limited to the specific examples listed herein. The presentation of these examples aims to deepen the comprehensive understanding of the disclosed content of the present invention.

[0054] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0055] A system for detecting belt deviation, the system includes a belt transportation bracket 101, a belt roller 102, a belt 103, an anti-deviation limit post 104, a fixing device 105 for a wireless belt deviation detection device, a wireless belt deviation detection device 201, a wireless gateway 301, and a cloud platform;

[0056] A fixing device 105 for a wireless belt deviation detection device is installed on the anti-deviation limit post 104 for fixing the wireless belt deviation detection device 201; The anti-deviation limit posts 104 on the left and right sides of the belt and the wireless belt deviation detection devices 201 fixed on the anti-deviation limit posts 104 together form a belt differential detection system, which detects the running state of the belt 103 in real time through the differential detection method;

[0057] The belt differential detection system uses a single-sided deployment or a simultaneous deployment on both the left and right sides for differential detection;

[0058] The wireless gateway 301 is wirelessly communicatively connected to multiple wireless belt deviation detection devices 201 and the cloud platform respectively;

[0059] The wireless gateway 301 is used to receive the sensing data of the wireless belt deviation detection device 201 or send a wake-up instruction to the wireless belt deviation detection device 201;

[0060] The wireless belt deviation detection device 201 periodically sends or receives a wireless gateway wake-up signal and then sends data. The wireless belt deviation detection device 201 collects the current angle data according to the periodic wake-up instruction of the wireless gateway 301, and uploads the collected angle data to the wireless gateway 301 in the form of a chain network using single-hop or multi-hop wireless communication methods;

[0061] The cloud platform comprehensively analyzes and judges the angle data uploaded by the wireless gateway 301.

[0062] The wireless belt deviation detection device 201 includes a wireless communication unit 202, a belt distance measurement unit 203, an inclination signal detection unit 204, a power supply 205, a main controller 206, a wireless transmission circuit, and a housing;

[0063] The belt distance measurement unit 203 is an ultrasonic ranging sensor, and the ultrasonic ranging sensor is used to measure the position distance between the belt and the ultrasonic ranging sensor; The ultrasonic frequency range is: 40K~500KHz, and the ultrasonic excitation voltage range is: 5~350V;

[0064] The inclination signal detection unit 204 is an attitude sensor, and the attitude sensor is used to detect the inclination angle of the wireless belt deviation detection device 201;

[0065] The distance between the wireless belt deviation detection device 201 and the edge of the belt 103 is 0 to 50 cm, and the installation position of the wireless belt deviation detection device 201 is adjusted according to the thickness of the belt 103;

[0066] The wireless communication technologies used by the wireless communication unit 202 include at least one of Bluetooth, RFID, LoRa, NB-IoT, 4G, 5G, and XingShan;

[0067] The data encoding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit, and a parity bit.

[0068] The wireless gateway 301 includes a wireless communication unit 302, a 4G / 5G communication module 303, an ETH Ethernet communication module 304, a power supply 305, a main controller 306, a wireless transmission circuit, and a housing;

[0069] The wireless communication technologies used by the wireless communication unit 302 include at least one of Bluetooth, RFID, Lora, NB-IoT, 4G, 5G, and XingShan;

[0070] The data encoding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit, and a parity bit.

[0071] The wireless belt deviation detection device 201 and the wireless gateway 301 are respectively arranged in corresponding housings. The housings are made of polymer materials, sealed with epoxy resin, and meet the IP65 protection level;

[0072] The wireless transmission circuit of the wireless belt deviation detection device 201 or the wireless gateway 301 adopts a circuit board microstrip antenna and is respectively connected to its main controller through a feeder.

[0073] The installation methods of the wireless belt deviation detection device 201 and the wireless gateway 301 are magnetic adsorption installation, fixed hole installation, and installation with matching structural parts; the device information and installation information of the wireless belt deviation detection device 201 and the wireless gateway 301 are printed on the surface of the housing in the form of two-dimensional codes and barcodes through a labeling machine, and scanned on-site for installation, deployment, and configuration.

[0074] The fixing device 105 of the wireless belt deviation detection device uses an auxiliary installation structure to install the wireless belt deviation detection device 201 on the anti-deviation limit post 104.

[0075] A method for detecting belt deviation, the method being: when the belt moves on the belt idler, the wireless belt deviation detection devices installed on the left and right sides of the belt measure the position distances between the belt and the wireless belt deviation detection devices. When the distances between the belt and the wireless belt deviation detection devices on the left and right sides of the belt are equal, the belt is in the middle position. When the distances are different, the belt is in a deviation state. The wireless belt deviation detection devices send the belt deviation signals to the cloud platform through wireless communication, and the cloud platform analyzes and judges the deviation signals;

[0076] When the belt touches the anti-deviation limit post and the anti-deviation limit post tilts, and the attitude sensor in the wireless belt deviation detection device detects a change in the attitude data of the anti-deviation limit post, the belt is deviated. The wireless belt deviation detection device transmits the belt deviation signal to the cloud platform through wireless communication, and the cloud platform analyzes and judges the deviation signal.

[0077] The working principle of the wireless belt deviation detection devices on the left and right sides of the belt is as follows:

[0078] The ultrasonic ranging sensor in the left wireless belt deviation detection device generates ultrasonic signals. The ultrasonic waves propagate in the air and are blocked by the belt when the propagation time is . The ultrasonic signals are reflected and then propagate in the air again. When the propagation time is , the ultrasonic signals are detected by the ultrasonic ranging sensor. Then the distance between the left wireless belt deviation detection device and the belt is calculated by the following formula:

[0079]

[0080] where , is the time from ultrasonic excitation to detection by the ultrasonic ranging sensor, obtained by the main controller through timing, is the propagation speed of ultrasonic waves in the air, which is a physical constant, generally taken as: 343 m / s;

[0081] The ultrasonic ranging sensor in the right wireless belt deviation detection device generates ultrasonic signals. The ultrasonic waves propagate in the air and are blocked by the belt when the propagation time is . The ultrasonic signals are reflected and then propagate in the air again. When the propagation time is , the ultrasonic signals are detected by the ultrasonic ranging sensor. Then the distance between the right wireless belt deviation detection device and the belt is calculated by the following formula:

[0082]

[0083] Among them, and is the time from when the ultrasonic excitation is generated to when it is detected by the ultrasonic ranging sensor, which is obtained by the main controller through timing. is the propagation speed of ultrasonic waves in the air, which is a physical constant, generally taken as: 343 m / s;

[0084] Let be the belt width, be the distance between the left wireless belt deviation detection device and the belt + the belt width + the distance between the right wireless belt deviation detection device and the belt, which is a fixed value after installation. The formula is:

[0085]

[0086] The right wireless belt deviation detection device and the right wireless belt deviation detection device measure and simultaneously. When one of the values changes, the other value changes accordingly. The wireless belt deviation detection device sends the measured and to the cloud platform through the wireless communication unit. The cloud platform measures the deviation amount and deviation rate by forming a differential signal from the data of the two ultrasonic ranging sensors on the left and right sides. The formula for the deviation amount is:

[0087]

[0088]

[0089]

[0090] Among them, and represent the belt deviation amount, and represent the distance between the belt and the wireless belt deviation detection device after the belt deviates;

[0091] Compare the belt deviation amounts on the left and right sides. When the deviation amounts on the left and right sides are equal, the belt is deviated. When the deviation amounts on the left and right sides are different, the current deviation amount is invalid data, as shown in Figure 5 .

[0092] The core of the working principle of the wireless belt deviation detection devices on the left and right sides of the belt is: the wireless differential detection method of the belt, which respectively detects the real-time distances between the belt and the ultrasonic ranging sensors on the left and right sides. By the change of the distance on one side of the belt, the change amount of the distance on the other side of the belt is judged. Through the comparison of the two groups of measured distances, it is judged whether the belt deviates. If the measured distance of the sensor on the other side does not shift or the change amount is quite different, it can be judged as false alarm or invalid data. The multi-data fusion judgment can improve the system stability and reduce the false alarm interference.

[0093] Those skilled in the art can clearly understand that for the specific working processes of the above-described systems, devices, modules, and units, reference can be made to the corresponding processes in the foregoing method embodiments. For the sake of brevity, they are not described herein again.

[0094] In addition, in each embodiment of the present invention, the functional units may be physically independent of each other, or two or more functional units may be integrated together, or all functional units may be integrated in a processing unit. The above-mentioned integrated functional units may be implemented in the form of hardware, or in the form of software or firmware.

[0095] Those of ordinary skill in the art can understand that if the above-mentioned integrated functional units are implemented in the form of software and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, which includes several instructions for causing a computing device (such as a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention when running the instructions. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store program codes. Alternatively, all or part of the steps of implementing the foregoing method embodiments can be completed by hardware related to program instructions (such as a computing device such as a personal computer, a server, or a network device, etc.). The program instructions can be stored in a computer-readable storage medium. When the program instructions are executed by the processor of the computing device, the computing device executes all or part of the steps of the method described in each embodiment of the present invention.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that within the spirit and principles of the present invention, it is still possible to modify the technical solutions described in the foregoing embodiments, or to equivalently replace some or all of the technical features thereof; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the protection scope of the present invention.

[0097] The content not described in detail in the specification of the present invention belongs to the prior art well-known to those of ordinary skill in the art. Although the illustrative specific embodiments of the present invention have been described above for the convenience of those skilled in the art to understand the present invention, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions made using the concept of the present invention are within the scope of protection.

Claims

1. A system for detecting belt deviation, characterized in that, The system includes a belt conveyor support (101), belt rollers (102), a belt (103), anti-deviation limit posts (104), a fixing device (105) for a wireless belt deviation detection device, a wireless belt deviation detection device (201), a wireless gateway (301), and a cloud platform; A fixing device (105) for a wireless belt deviation detection device is installed on the anti-deviation limit post (104) for fixing the wireless belt deviation detection device (201); The anti-deviation limit posts (104) on the left and right sides of the belt and the wireless belt deviation detection devices (201) fixed on the anti-deviation limit posts (104) together form a belt differential detection system, which detects the running state of the belt (103) in real time through a differential detection method; The belt differential detection system performs differential detection using a single-side deployment or a simultaneous deployment on both the left and right sides; The wireless gateway (301) is wirelessly communicatively connected to a plurality of wireless belt deviation detection devices (201) and the cloud platform respectively; The wireless gateway (301) is used to receive the sensing data of the wireless belt deviation detection device (201) or send a wake-up instruction to the wireless belt deviation detection device (201); The wireless belt deviation detection device (201) periodically sends or receives a wireless gateway wake-up signal and then sends data. The wireless belt deviation detection device (201) collects the current angle data according to the periodic wake-up instruction of the wireless gateway (301), and uploads the collected angle data to the wireless gateway (301) in the form of a chain network using a single-hop or multi-hop wireless communication method; The cloud platform comprehensively analyzes and judges the angle data uploaded by the wireless gateway (301).

2. The system for detecting belt deviation according to claim 1, wherein The wireless belt deviation detection device (201) includes a wireless communication unit (202), a belt distance measurement unit (203), an inclination signal detection unit (204), a power supply (205), a main controller (206), a wireless transmission circuit, and a housing; The belt distance measurement unit (203) is an ultrasonic ranging sensor, and the ultrasonic ranging sensor is used to measure the position distance between the belt and the ultrasonic ranging sensor; The ultrasonic frequency range is: 40K~500KHz, and the ultrasonic excitation voltage range is: 5~350V; The inclination signal detection unit (204) is an attitude sensor, and the attitude sensor is used to detect the inclination angle of the wireless belt deviation detection device (201); The distance between the wireless belt deviation detection device (201) and the edge of the belt (103) is 0~50 cm, and the installation position of the wireless belt deviation detection device (201) is adjusted according to the thickness of the belt (103); The wireless communication technology used by the wireless communication unit (202) includes at least one of Bluetooth, RFID, Lora, NB-IoT, 4G, 5G, and XingFlash; The data coding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit, and a check bit.

3. The system for detecting belt deviation according to claim 2, wherein, The wireless gateway (301) includes a wireless communication unit (302), a 4G / 5G communication module (303), an ETH Ethernet communication module (304), a power supply (305), a main controller (306), a wireless transmission circuit, and a housing; The wireless communication technologies used by the wireless communication unit (302) include at least one of Bluetooth, RFID, Lora, NB-IoT, 4G, 5G, and XingShan; The data encoding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit, and a check bit.

4. The system for detecting belt deviation according to claim 3, characterized in that, The wireless belt deviation detection device (201) and the wireless gateway (301) are respectively arranged in corresponding housings. The housing is made of a polymer material, encapsulated with epoxy resin, and meets the IP65 protection level; The wireless transmission circuit of the wireless belt deviation detection device (201) or the wireless gateway (301) uses a circuit board microstrip antenna and is respectively connected to its main controller through a feeder line.

5. The system for detecting belt deviation according to claim 4, wherein, The installation methods of the wireless belt deviation detection device (201) and the wireless gateway (301) are magnetic adsorption installation, fixed hole installation, and installation with a matching structural member; the device information and installation information of the wireless belt deviation detection device (201) and the wireless gateway (301) are printed on the housing surface in the form of two-dimensional codes and barcodes through a marking machine, and the site scans the codes for installation deployment and configuration.

6. The system for detecting belt deviation according to claim 5, characterized in that, The fixing device (105) of the wireless belt deviation detection device installs the wireless belt deviation detection device (201) on the anti-deviation limit post (104) using an auxiliary installation structure.

7. A method for detecting belt deviation, characterized in that, The method is as follows: When the belt moves on the belt idler, the wireless belt deviation detection devices installed on the left and right sides of the belt measure the position distance between the belt and the wireless belt deviation detection devices. When the distances between the belt and the wireless belt deviation detection devices on the left and right sides of the belt are equal, the belt is in the middle position. When the distances between the belt and the wireless belt deviation detection devices on the left and right sides of the belt are different, the belt is in a deviation state. The wireless belt deviation detection device sends the deviation signal of the belt to the cloud platform through wireless communication, and the cloud platform analyzes and judges the deviation signal; When the belt touches the anti-deviation limit post and the anti-deviation limit post tilts, and the attitude sensor in the wireless belt deviation detection device detects a change in the attitude data of the anti-deviation limit post, the belt is deviated. The wireless belt deviation detection device transmits the deviation signal of the belt to the cloud platform through wireless communication, and the cloud platform analyzes and judges the deviation signal.

8. A method for detecting belt deviation according to claim 7, characterized in that, The working principle of the wireless belt deviation detection devices on the left and right sides of the belt is: The ultrasonic ranging sensor in the left - hand wireless belt deviation detection device generates ultrasonic signals. The ultrasonic waves propagate in the air. When the propagation time is it encounters the belt obstruction, and the ultrasonic signal is reflected and then propagates in the air again. When the propagation time is the ultrasonic signal is detected by the ultrasonic ranging sensor, then the distance between the left - hand wireless belt deviation detection device and the belt is calculated by the following formula: , where and is the time from when ultrasonic excitation is generated to when it is detected by the ultrasonic ranging sensor, obtained by the main controller through timing, is the propagation speed of ultrasonic waves in air; The ultrasonic ranging sensor in the right - hand wireless belt deviation detection device generates ultrasonic signals. The ultrasonic waves propagate in the air. When the propagation time is it encounters the belt obstruction, and the ultrasonic signal is reflected and then propagates in the air again. When the propagation time is the ultrasonic signal is detected by the ultrasonic ranging sensor, then the distance between the right - hand wireless belt deviation detection device and the belt is calculated by the following formula: , where and is the time from when ultrasonic excitation is generated to when it is detected by the ultrasonic ranging sensor, obtained by the main controller through timing, is the propagation speed of ultrasonic waves in air; Let be the belt width, be the distance between the left wireless belt deviation detection device and the belt + the belt width + the distance between the right wireless belt deviation detection device and the belt, which is a fixed value after installation. The formula is: The right - hand wireless belt deviation detection device and the left - hand wireless belt deviation detection device measure simultaneously and When one of the values changes, the other value changes accordingly. The wireless belt deviation detection device sends the measured and to the cloud platform through the wireless communication unit. The cloud platform measures the deviation amount and deviation rate by forming a differential signal from the data of the two ultrasonic ranging sensors on the left and right sides. The calculation formula for the deviation amount is as follows: , , , where and represent the belt deviation amount, and represent the distance between the belt and the wireless belt deviation detection device after the belt deviates; Compare the deviation amounts on the left and right sides of the belt. When the deviation amounts on the left and right sides are equal, the belt is deviated. When the deviation amounts on the left and right sides are different, the current deviation amount is invalid data.

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