A conveyor belt full-surface thickness measuring device
By using four three-dimensional depth cameras to bounce and cone protective cover design in the conveyor belt thickness measurement device, the problem of incomplete detection accuracy and detection of high-speed conveyor belts is solved, and clear imaging of high-speed conveyor belts and full-width thickness measurement is achieved.
Patent Information
- Application Number
- CN202411993574.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-08
AI Technical Summary
The problems of the existing technology such as detection accuracy and incomplete detection under high-speed operation have not been completely solved, and the jitter of the conveyor belt will also affect the detection accuracy.
The method of shooting at 4 three-dimensional depth cameras is adopted to measure the thickness of the full belt surface of the conveyor belt. Through the line scanning mode of the depth camera and the design of the conical protective cover, it ensures clear imaging at high speed and effectively resists the impact of conveyor belt jitter.
It realizes clear imaging of the high-speed 7m/s conveyor belt and full width thickness measurement, solving the problem of inaccurate measurement caused by jitter, and improving the accuracy and comprehensiveness of detection.
Smart Images
Figure CN119779171A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a device for measuring the thickness of a conveyor belt on the entire belt surface, and belongs to the technical field of conveyor belt thickness measurement. Background Art
[0002] At present, the main technologies used for conveyor belt thickness measurement include but are not limited to ultrasonic testing, X-ray imaging, laser scanning, and measurement methods based on electromagnetic induction, etc. Each technology has its unique advantages and applicable scenarios.
[0003] Ultrasonic testing: The material thickness is measured by emitting ultrasonic waves and receiving the reflected signal. This method is non-destructive and applicable to a variety of materials.
[0004] X-ray imaging: It can provide information about internal structures and is very useful for certain specific applications, but radiation safety issues need to be considered.
[0005] Laser scanning: Use laser for non-contact measurement with high accuracy, suitable for high-speed or long-distance measurement occasions.
[0006] Electromagnetic induction method: Measurement is based on the different effects of different materials on the magnetic field. It is particularly suitable for measuring the coating thickness on metal substrates.
[0007] Conveyor belt thickness measurement technology is developing towards higher accuracy, more intelligence and adaptability to more diverse working environments. The following are several key development points: 1. Non-contact measurement: Non-contact thickness measurement technology based on the principles of laser, ultrasonic, electromagnetic and radiation is widely used, which can realize online real-time monitoring without damaging the conveyor belt.
[0008] 2. Integration of smart sensors and IoT: Modern thickness measurement equipment is increasingly integrated with smart sensors, which transmit data to the cloud or control center through IoT technology, supporting remote monitoring and data analysis, and facilitating predictive maintenance.
[0009] 3. Machine Learning and Artificial Intelligence: Use machine learning algorithms to process data from sensors to more accurately identify abnormal situations and provide fault warnings, thereby improving system reliability and efficiency.
[0010] 4. Portable devices: Portable handheld thickness gauges are now available on the market, which are ideal for quick on-site testing or use in hard-to-reach places.
[0011] 5. Composite materials and applications in special environments: We have developed special thickness measurement solutions for conveyor belts made of special materials used in the chemical, mining and other industries. We have also designed high-stability measurement products suitable for extreme working conditions (such as high temperature and high pressure environments).
[0012] 6. Image processing technology: Use high-resolution cameras with advanced image analysis software to directly evaluate the conveyor belt condition, especially suitable for detecting problems such as surface damage or uneven wear.
[0013] However, at present, problems such as detection accuracy and incomplete detection under high-speed operation cannot be perfectly solved. At the same time, conveyor belt vibration will also affect the detection. Summary of the invention
[0014] The present invention overcomes the shortcomings of the prior art and provides a device for measuring the thickness of the entire conveyor belt surface. It adopts four three-dimensional depth cameras to realize depth measurement of two surfaces at the same position of the conveyor belt. While covering the entire width of the conveyor belt, it can effectively solve the problem of inaccurate measurement caused by jitter during the operation of the conveyor belt.
[0015] In order to solve the above technical problems, the technical solution adopted by the present invention is: a conveyor belt full-surface thickness measuring device, including a conveyor belt frame, on which a conveyor belt is arranged, including a depth camera, a conical protective cover, a mounting bracket and a measuring host, depth cameras are arranged on both upper and lower sides of the conveyor belt, and the corresponding depth cameras on the upper and lower sides of the conveyor belt are arranged opposite to each other, the depth camera is fixedly arranged on the conveyor belt frame through the mounting bracket, and the outer side of the depth camera is arranged with a conical protective cover, and the depth camera is arranged on the outer side of the conveyor belt frame. The measuring host is electrically connected; The depth camera adopts a line scanning mode. The laser emitter in the depth camera emits a fan-shaped laser line to form a conveyor belt contour surface on the upper and lower surfaces of the conveyor belt. The points at the same position and time on the conveyor belt surface are summed and the difference is made with the fixed installation distance of the depth camera to obtain the current conveyor belt cross-section thickness value. After the conveyor belt moves, a continuous belt cross-section thickness value can be obtained.
[0016] Furthermore, the number of the depth cameras is four, two of which are arranged on the upper and lower sides of the conveyor belt, and the laser lines irradiated to the surface of the conveyor belt by the two depth cameras are connected and the sum of their lengths is equal to the width of the conveyor belt.
[0017] Furthermore, the depth camera is a three-dimensional depth camera.
[0018] Furthermore, the structure of the conical protective cover includes: a front plate, a rear plate, a side plate, a fixed plate and a fence plate, the front plate, the rear plate and the side plate are all trapezoidal thin plates, the front plate and the rear plate are symmetrically arranged, and the front plate and the rear plate are inclined to each other, side plates are arranged on both sides of the front plate and the rear plate, the side plates are arranged vertically, the front plate, the rear plate and the side plates are connected in sequence to form a conical shell with a large opening at the bottom and a lower part at the top, the upper end of the conical shell is provided with a fence plate, the fence plate is a fence structure with three sides closed and one side open, a fixed plate is provided in the middle of one side of the open fence plate, and the fixed plate and the fence plate are both fixedly provided on the fence structure.
[0019] Furthermore, the fixing plate and the fence plate are integrally formed.
[0020] Furthermore, the fixing plate and the fence plate are fixedly arranged on the depth camera.
[0021] Compared with the prior art, the present invention has the following beneficial effects: the present invention adopts the method of four three-dimensional depth cameras to realize the thickness measurement of the conveyor belt, and realizes clear imaging of the high-speed 7m / s conveyor belt in operation, solving the influence caused by the full-width thickness measurement of the conveyor belt and the conveyor belt jitter. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present invention will be further described below in conjunction with the accompanying drawings.
[0023] Figure 1 It is a structural schematic diagram of the present invention.
[0024] Figure 2 Schematic diagram of the fan-shaped laser line emitted by the laser emitter in the depth camera of the present invention.
[0025] Figure 3 It is a schematic structural diagram of the conical protective cover in the present invention.
[0026] In the figure: 1 is a depth camera, 2 is a conical protective cover, 21 is a front plate, 22 is a rear plate, 23 is a side plate, 24 is a fixed plate, 25 is a fence plate, 3 is a mounting bracket, 4 is a conveyor belt rack, and 5 is a measuring host. DETAILED DESCRIPTION
[0027] The present invention will be further described below in conjunction with specific embodiments.
[0028] like Figure 1 , Figure 2 and Figure 3As shown, a device for measuring the thickness of the entire surface of a conveyor belt of the present invention comprises a conveyor belt frame 4, on which a conveyor belt is arranged, comprising a depth camera 1, a conical protective cover 2, a mounting bracket 3 and a measuring host 5, depth cameras 1 are arranged on both upper and lower sides of the conveyor belt, the depth camera 1 is a three-dimensional depth camera, the number of the depth cameras 1 is four, two are arranged on both upper and lower sides of the conveyor belt, the laser lines irradiated to the surface of the conveyor belt by the two depth cameras 1 are connected, and the sum of their lengths is equal to the width of the conveyor belt, the corresponding depth cameras 1 on the upper and lower sides of the conveyor belt are arranged opposite to each other, the depth camera 1 is fixedly arranged on the conveyor belt frame 4 by the mounting bracket 3, the outer side of the depth camera 1 is arranged with a conical protective cover 2, and the depth camera 1 is electrically connected to the measuring host 5 arranged on the outer side of the conveyor belt frame 4.
[0029] The depth camera 1 adopts a line scanning mode. The laser emitter in the depth camera 1 emits a fan-shaped laser line to form a conveyor belt contour surface on the upper and lower surfaces of the conveyor belt. The points at the same position and time on the conveyor belt surface are summed and the difference is made with the fixed installation distance of the depth camera 1 to obtain the current conveyor belt cross-section thickness value. After the conveyor belt moves, a continuous belt cross-section thickness value can be obtained.
[0030] The structure of the conical protective cover 2 includes: a front plate 21, a rear plate 22, a side plate 23, a fixing plate 24 and a fence plate 25, wherein the front plate 21, the rear plate 22 and the side plate 23 are all trapezoidal thin plates, the front plate 21 and the rear plate 22 are symmetrically arranged, and the front plate 21 and the rear plate 22 are arranged at an angle to each other, the side plates 23 are arranged on both sides of the front plate 21 and the rear plate 22, and the side plates 23 are arranged vertically, and the front plate 21, the rear plate 22 and the side plates 23 are connected in sequence to form a conical shell with a large opening at the bottom and a lower floor at the top, and the conical shell has a A fence plate 25 is arranged at the upper end, and the fence plate 25 is a fence structure with three closed sides and one open side. A fixing plate 24 is arranged in the middle of the open side of the fence plate 25. The fixing plate 24 and the fence plate 25 are both fixedly arranged on the fence structure. The fixing plate 24 and the fence plate 25 are integrally formed. The fixing plate 24 and the fence plate 25 are fixedly arranged on the depth camera 1. The conical protective cover 2 blocks the laser beam, does not affect the irradiation of the fan-shaped laser line, and also effectively protects the depth camera 1, reducing the pollution of the depth camera 1.
[0031] The working principle of the present invention is as follows: four three-dimensional depth cameras are used to realize depth measurement of two surfaces at the same position of the conveyor belt. The four three-dimensional depth cameras collect data synchronously, thereby realizing accurate thickness measurement of a conveyor belt in a shaking state. Among them, the camera adopts a line scanning mode, which can adapt to clear imaging at high belt speeds, and at the same time solves the impact of the harsh on-site environment on the camera.
[0032] The single depth camera interpupillary distance line scanning camera of the present invention measures a width of 650mm, and two cameras measure a width of 1200mm; the laser emitter in the depth camera emits a fan-shaped laser line to form a belt contour surface of a shape on the upper and lower surfaces of the lower belt, and the points at the same position and time on the belt surface are summed, and the difference with the fixed installation distance can be obtained to obtain the thickness value of the current belt cross section, and a continuous belt cross section thickness value can be obtained after the belt moves.
[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.
Claims
1. A conveyor belt full-surface thickness measuring device, comprising a conveyor belt frame (4), wherein a conveyor belt is arranged on the conveyor belt frame (4), characterized in that: The device comprises a depth camera (1), a conical protective cover (2), a mounting bracket (3) and a measuring host (5), wherein the depth camera (1) is arranged on both upper and lower sides of the conveyor belt, and the corresponding depth cameras (1) on both upper and lower sides of the conveyor belt are arranged opposite to each other, and the depth camera (1) is fixedly arranged on a conveyor belt frame (4) through the mounting bracket (3), and the outer side of the depth camera (1) is arranged with a conical protective cover (2), and the depth camera (1) is electrically connected to the measuring host (5) arranged on the outer side of the conveyor belt frame (4); The depth camera (1) adopts a line scanning mode. The laser emitter in the depth camera (1) emits a fan-shaped laser line to form a conveyor belt profile surface on the upper and lower surfaces of the conveyor belt. The points on the conveyor belt surface at the same position and the same time are summed, and the thickness value of the current conveyor belt cross section is obtained by subtracting the fixed installation distance from the depth camera (1). After the conveyor belt moves, a continuous belt cross section thickness value can be obtained.
2. A conveyor belt full-surface thickness measuring device according to claim 1, characterized in that: The number of the depth cameras (1) is four, two of which are arranged on the upper and lower sides of the conveyor belt, and the laser lines irradiated to the surface of the conveyor belt by the two depth cameras (1) are connected, and the sum of their lengths is equal to the width of the conveyor belt.
3. The device for measuring the thickness of a conveyor belt on the entire surface of claim 1, characterized in that: The depth camera (1) is a three-dimensional depth camera.
4. The device for measuring the thickness of a conveyor belt on the entire surface of claim 1, characterized in that: The structure of the conical protective cover (2) comprises: a front plate (21), a rear plate (22), a side plate (23), a fixing plate (24) and a fence plate (25); the front plate (21), the rear plate (22) and the side plate (23) are all trapezoidal thin plates; the front plate (21) and the rear plate (22) are symmetrically arranged, and the front plate (21) and the rear plate (22) are inclined to each other; the side plates (23) are arranged on both sides of the front plate (21) and the rear plate (22); The side panels (23) are arranged vertically, and the front panel (21), the rear panel (22) and the side panels (23) are connected in sequence to form a conical shell with a large opening at the bottom and a lower floor at the top. A fence panel (25) is arranged at the upper end of the conical shell. The fence panel (25) is a fence structure with three closed sides and one open side. A fixed panel (24) is arranged in the middle of the open side of the fence panel (25). The fixed panel (24) and the fence panel (25) are both fixedly arranged on the fence structure.
5. The device for measuring the thickness of the entire conveyor belt surface according to claim 4, characterized in that: The fixing plate (24) and the fence plate (25) are integrally formed.
6. A conveyor belt full-surface thickness measuring device according to claim 5, characterized in that: The fixing plate (24) and the fence plate (25) are fixedly arranged on the depth camera (1).