Online belt tearing detection device

Abstract

The invention belongs to the technical field of belt detection, and discloses a belt tearing on-line detection device which comprises a rack, a transmission conveying belt is arranged on the rack, a mounting frame is arranged below the belt in the rack, and a high-frequency industrial linear array camera and a high-brightness coaxial line light source assembly are arranged on the mounting frame. The high-frequency industrial line-scan digital camera is located on one side of the high-brightness coaxial line light source assembly, a self-cleaning device is arranged on the installation frame, a coding positioning assembly is arranged on the machine frame, an electric appliance control cabinet is arranged on one side of the machine frame, and the electric appliance control cabinet is electrically connected with the high-frequency industrial line-scan digital camera, the high-brightness coaxial line light source assembly, the self-cleaning device and the coding positioning assembly. Light beams emitted by the high-brightness coaxial line light source assembly are refracted to the lower surface of the belt and then reflected to the high-frequency industrial line-scan digital camera to form an image, the image is recognized by the upper computer so as to judge the state of the lower surface of the belt, and the definition of the obtained image is ensured through the self-cleaning device. The accuracy of abnormal tearing detection of the lower surface of the belt is improved.

Description

Technical Field

[0001] This invention belongs to the field of belt inspection technology and relates to an online belt tear detection device. Background Technology

[0002] In industrial production, belt conveyors, as general auxiliary equipment across multiple fields, play an extremely critical role. Due to factors such as the large size of the equipment, the extended transmission distance, the complexity of the operating mechanism, and the harsh operating environment, there are many risks of failure, which can easily lead to safety accidents. Given the physical properties of material transmission, conveyor belts frequently experience jamming, tearing, or even breakage. These phenomena not only significantly affect operating efficiency but also pose a major threat to production safety.

[0003] During long-term operation, belt conveyors may experience tearing. Tear detection devices are used to monitor belts in real time, such as by using industrial cameras or laser scanning, and by using auxiliary light sources to illuminate the detection area. However, traditional industrial cameras are not very effective at detecting tiny tears on belts, with a high rate of false detections and missed detections, making it difficult to accurately capture cracks. This leads to an increase in the number of small cracks, which in turn damages the belt.

[0004] In addition, traditional belt monitoring equipment, when exposed to complex industrial environments for extended periods, accumulates dust over time, causing the images captured by the camera to become blurred. This affects the identification of tear detection, reduces the accuracy of detection, and increases the risk of false alarms or missed detections.

[0005] Therefore, it is particularly important to develop an online belt tear detection device that can detect small cracks in belts and has a self-cleaning function. Summary of the Invention

[0006] This invention provides an online belt tear detection device, which aims to solve the problems of existing belt tear detection methods that are difficult to identify small crack defects in belts, and that inadequate cleaning leads to blurred images, reducing detection accuracy and increasing the risk of false alarms or missed detections.

[0007] To achieve the above objectives, the present invention provides an online belt tear detection device, comprising: A frame, on which a transmission conveyor belt is provided; The mounting frame is located below the belt inside the frame. The mounting frame is equipped with a high-frequency industrial line scan camera and a high-brightness coaxial light source assembly. The high-frequency industrial line scan camera is located on one side of the high-brightness coaxial light source assembly. The light beam emitted by the high-brightness coaxial light source assembly is refracted to the lower surface of the belt and then reflected back to the high-frequency industrial line scan camera for imaging. A self-cleaning device is provided on the mounting bracket, and the self-cleaning device is located on one side of the high-brightness coaxial light source assembly; The frame is equipped with an encoding and positioning component, which is used to abut against the lower surface of the belt and record the displacement with the belt drive to realize the positioning of the belt tear position. An electrical control cabinet is provided on one side of the frame. The electrical control cabinet is electrically connected to a high-frequency industrial line scan camera, a high-brightness coaxial light source assembly, a self-cleaning device, and an encoding positioning assembly.

[0008] Preferably, the mounting frame has a rotating swing arm with a shaft connection at the center of both sides, and a movable telescopic adjustable support arm is connected to the bottom surface of one side of the mounting frame. The end of the support arm is fixed to the mounting frame with a shaft connection.

[0009] Preferably, the high-brightness coaxial light source assembly includes a refractor, a semi-reflective mirror, a transparent mirror, and a light source module disposed on the mounting bracket. The semi-reflective mirror is located above the refractor, the transparent mirror is located above the semi-reflective mirror, the light source module is located on one side of the semi-reflective mirror, and the transparent mirror is located below the lower surface of the belt. The light source module emits a light beam that is refracted by the semi-reflective mirror and reflected to the transparent mirror to illuminate the lower surface of the belt, and then reflected back to the refractor to a high-frequency industrial line scan camera for real-time monitoring of the belt surface condition.

[0010] Preferably, the refracting mirror and the semi-reflective mirror are set at a 45-degree angle, and the light-transmitting mirror is set at an angle to prevent the light reflected from the belt from affecting the data acquisition of the high-frequency industrial line scan camera.

[0011] Preferably, the self-cleaning device includes a guide rail frame, a sliding block, a lead screw, a motor, a cleaning component, and a water pump. The mounting frame is provided with a guide rail frame, the guide rail frame is provided with a sliding block, the sliding block is provided with a motor, and a lead screw is provided on one side of the guide rail frame. The lead screw passes through the sliding block and is connected to the motor. A cleaning component extends from one end of the sliding block to drive the cleaning component for cleaning the outer surface of the lens. The mounting frame is provided with a water pump, and the sliding block is provided with a water inlet. The two ends of the water inlet are respectively connected to the water pump and the cleaning component.

[0012] Preferably, the cleaning assembly includes a cleaning head, a silicone squeegee, a brush, and a water outlet. The cleaning head is connected to one end of the sliding block. The cleaning head has two water outlets. A brush is provided between the two water outlets. A silicone squeegee is provided on the outside of each of the two water outlets. The water outlets are connected to the water inlet.

[0013] Preferably, a glass window is sealed and installed on the outer side of the light-transmitting mirror, and the silicone squeegee and brush abut against the glass window.

[0014] Preferably, the coding and positioning assembly includes a fixed base, a connecting arm, a counting wheel, an encoder, and a tension spring. The fixed base is fixedly connected to the frame, and the connecting arm is skewingly connected to the fixed base. One end of the connecting arm is skewingly connected to a rotatable counting wheel. The encoder is mounted on the connecting arm and connected to the counting wheel. A tension spring is connected between the fixed base and the connecting arm so that the counting wheel abuts against the lower surface of the belt.

[0015] Preferably, the electrical control cabinet is equipped with a main control board and a light source controller. The main control board is electrically connected to a high-frequency industrial line scan camera, a self-cleaning device, and an encoding positioning component. The light source controller is electrically connected to a high-brightness coaxial light source component.

[0016] Preferably, the electrical control cabinet is connected to a host computer for communication. The high-frequency industrial line scan camera transmits the image of the lower surface of the belt to the host computer. The host computer has a built-in image recognition system to determine the actual state of the lower surface of the belt.

[0017] The advantages of this invention over the prior art are: This invention provides an online belt tear detection device. A light beam emitted by a high-brightness coaxial light source assembly is refracted onto the lower surface of the belt and reflected to a high-frequency industrial line scan camera to form an image. The image is then recognized by a host computer to determine the condition of the lower surface of the belt. A self-cleaning device ensures the clarity of the image acquired by the high-frequency industrial line scan camera, thereby improving the accuracy of detecting abnormal tears on the lower surface of the belt.

[0018] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the frame, belt, and mounting bracket of the present invention; Figure 2 for Figure 1 Side view; Figure 3 This is a schematic diagram of the mounting bracket, high-frequency industrial line scan camera, high-brightness coaxial light source assembly, and self-cleaning device of the present invention. Figure 4 This is a schematic diagram of the adjustment structure of the mounting frame, rotating swing arm, and support arm of the present invention; Figure 5 for Figure 3 A cross-sectional structural diagram; Figure 6 This is a schematic diagram of the high-brightness coaxial light source assembly and its optical path according to the present invention; Figure 7 This is a schematic diagram of the self-cleaning device of the present invention; Figure 8 This is a schematic diagram of the cleaning component structure of the present invention; Figure 9 This is a schematic diagram of the coding and positioning component structure of the present invention; Figure 10 This is a schematic diagram showing the connection between the host computer and the electrical control cabinet of the present invention.

[0020] Figure Labels

[0021] 1. Frame; 2. Belt; 3. Mounting bracket; 4. High-frequency industrial line scan camera; 5. High-brightness coaxial light source assembly; 501. Refracting mirror; 502. Semi-reflective mirror; 503. Transmitting mirror; 504. Light source module; 505. Glass window; 6. Self-cleaning device; 601. Guide rail frame; 602. Sliding block; 603. Lead screw; 604. Motor; 605. Water inlet; 7. Encoding and positioning assembly; 701. Fixing base; 702. Connecting arm; 703. Meter wheel; 704. Encoder; 705. Tension spring; 8. Rotating swing bracket; 9. Cleaning assembly; 901. Cleaning head; 902. Silicone squeegee; 903. Brush; 904. Water outlet; 10. Support arm; 11. Electrical control cabinet; 12. Host computer; 13. Main control board; 14. Light source controller. Detailed Implementation

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] To achieve the above objectives, embodiments of the present invention provide an online belt tear detection device, referring to... Figure 1-10 As shown, it includes: The frame 1 is equipped with a transmission conveyor belt 2; Mounting frame 3 is located inside the frame 1 below the belt 2. Mounting frame 3 is equipped with a high-frequency industrial line scan camera 4 and a high-brightness coaxial light source assembly 5. The high-frequency industrial line scan camera 4 is located on one side of the high-brightness coaxial light source assembly 5. The light beam emitted by the high-brightness coaxial light source assembly 5 is refracted to the lower surface of the belt 2 and then reflected back to the high-frequency industrial line scan camera 4 for imaging. Self-cleaning device 6 is provided on the mounting bracket 3 and is located on one side of the high-brightness coaxial light source assembly 5. The coding and positioning component 7 is provided on the frame 1. The coding and positioning component 7 is used to abut against the lower surface of the belt 2 and record the displacement as the belt 2 is driven to realize the positioning of the tear position of the belt 2. Electrical control cabinet 11 is provided on one side of the frame 1. Electrical control cabinet 11 is electrically connected to high-frequency industrial line scan camera 4, high-brightness coaxial light source assembly 5, self-cleaning device 6, and coding positioning assembly 7.

[0025] In this embodiment, based on the long-distance conveyor belt 2, an additional mounting frame 3, a high-frequency industrial line scan camera 4, a high-brightness coaxial light source assembly 5, an encoding positioning assembly 7, and a self-cleaning device 6 are arranged. The light beam refracted by the high-brightness coaxial light source assembly 5 is projected onto the lower surface of the belt 2 and reflected back to the high-frequency industrial line scan camera 4 for imaging. Furthermore, the self-cleaning device 6 further cleans the belt to ensure clear and flawless imaging. When a small tear is detected, the encoding positioning assembly 7 confirms the location of the tear in the belt 2. This method is widely used in various fields such as ore transportation, coal mining, steel, and construction, effectively preventing production accidents and economic losses caused by tears in the ore conveyor belt 2.

[0026] Among them, the high-frequency industrial linear array camera 4 is a special industrial camera that acquires images through a one-dimensional linear array sensor. It has the advantages of high acquisition speed, high sensitivity and high precision acquisition, and is suitable for belt 2 inspection scenarios. The high-brightness coaxial light source assembly 5 is a light source combining high-density LEDs and a beam splitter. It is mainly used for machine vision and surface inspection, and can eliminate shadows caused by unevenness of the object surface. It is suitable for detecting damage features on smooth surfaces. The coding and positioning component 7 is used for positioning the belt 2. Its principle is that the belt 2 will drive the components in the coding and positioning component 7 to rotate during the rotation process. After the equipment issues a tear detection warning signal, the specific location of the defect in the belt 2 can be obtained according to the number of rotations of the coding and positioning component 7.

[0027] refer to Figure 4As shown, the mounting frame 3 has a rotating swing arm 8 connected to the center of both sides, and a movable telescopic adjustable support arm 10 is connected to the bottom surface of one side of the mounting frame 3. The end of the support arm 10 is fixed to the mounting frame 3 by a shaft connection. The length of the support arm 10 can be adjusted by using the bidirectional nut of the support arm 10 to support the swing height of the mounting frame 3. At the same time, the rotating swing arm 8 swings the angle of the entire mounting frame 3 under the action of the support arm 10. In this way, the parallel alignment of the high-frequency industrial line scan camera 4, the high-brightness coaxial light source assembly 5, and the self-cleaning device 6 on the mounting frame 3 with respect to the lower surface of the belt 2 can be adjusted to ensure that the beam of light is perpendicularly irradiated to the lower surface of the belt 2.

[0028] For details, please refer to Figure 5-6 As shown, the high-brightness coaxial light source assembly 5 includes a refractor 501, a semi-reflective mirror 502, a light transmission mirror 503, and a light source module 504, all mounted on the mounting bracket 3. The semi-reflective mirror 502 is located above the refractor 501, and the light transmission mirror 503 is located above the semi-reflective mirror 502. The light source module 504 is located to one side of the semi-reflective mirror 502, and the light transmission mirror 503 is located below the lower surface of the belt 2. The light beam emitted by the light source module 504 is refracted by the semi-reflective mirror 502 and reflected to the light transmission mirror 503, illuminating the lower surface of the belt 2. The light beam is also reflected back to the refractor 501 to the high-frequency industrial line scan camera 4 for real-time monitoring of the surface condition of the belt 2. The refractor 501 and the semi-reflective mirror 502 are set at a 45-degree angle, and the light transmission mirror 503 is tilted to prevent the light reflected from the belt from affecting the data collected by the high-frequency industrial line scan camera. The 45-degree angle setting is preferred.

[0029] In this embodiment, the refractor 501 is located on the same horizontal line as the high-frequency industrial line scan camera 4, and the refractor 501 forms an angle of 45° with the horizontal. It is used to reflect the light path of the high-frequency industrial line scan camera 4 to collect information, so that the light path is reflected from the horizontal direction to the vertical direction (perpendicular to the direction of the belt 2), and passes through the semi-reflective lens 502 and the light transmission lens 503. The semi-reflective lens 502 is located directly above the refractor 501 and forms an angle of -45° with the horizontal (opposite to the direction of the refractor 501). The light source module 504 is on the same horizontal line as the semi-reflective lens 502 and is opposite to the direction of the high-frequency industrial line scan camera 4. After being reflected by the semi-reflective lens 502, the light beam of the light source component coincides with the light path of the high-frequency industrial line scan camera 4 and passes through the light transmission lens 503, which is directly above the semi-reflective lens 502. When the light source module 504 emits a bright beam, it is reflected by the semi-reflective lens 502 and then shines on the area directly below the belt 2 through the light transmission mirror 503. The light reflected from the belt 2 passes through the light transmission mirror 503 and the semi-reflective lens 502 to the refractor 501. After being reflected by the refractor 501, the light changes from vertical to horizontal and returns to the high-frequency industrial line scan camera 4, thus achieving image acquisition.

[0030] Further reference Figure 7-8As shown, the self-cleaning device 6 includes a guide rail frame 601, a sliding block 602, a lead screw 603, a motor 604, a cleaning component 9, and a water pump. The guide rail frame 601 is mounted on the mounting frame 3, the sliding block 602 is mounted on the guide rail frame 601, and the motor 604 is mounted on the sliding block 602. The lead screw 603 is mounted on one side of the guide rail frame 601. The lead screw 603 passes through the sliding block 602 and is connected to the motor 604. The cleaning component 9 extends from one end of the sliding block 602 to drive the cleaning component 9 for cleaning the outer surface of the lens 503. The water pump is mounted on the mounting frame 3, and the water inlet 605 is mounted on the sliding block 602. The two ends of the water inlet 605 are connected to the water pump and the cleaning component 9, respectively.

[0031] The cleaning assembly 9 includes a cleaning head 901, a silicone squeegee 902, a brush 903, and a water outlet 904. The cleaning head 901 is connected to one end of the sliding block 602. The cleaning head 901 has two water outlets 904. The brush 903 is located between the two water outlets 904. The silicone squeegee 902 is located on the outer side of each of the two water outlets 904. The water outlets 904 are connected to the water inlet 605. A glass window 505 is sealed and installed on the outer side of the light-transmitting mirror 503. The silicone squeegee 902 and the brush 903 abut against the glass window 505.

[0032] In this embodiment, the high-brightness light beam emitted by the light source module 504 is reflected by the semi-reflective lens 502 and then shines on the lower surface of the belt 2 through the glass window 505. The glass window 505 and the light-transmitting lens 503 are sealed to prevent dust from adhering to the light-transmitting lens 503 and affecting the imaging quality. The electrical control cabinet 11 controls the operation of the self-cleaning device 6. The motor 604 drives the lead screw 603 to rotate, causing the sliding block 602 to slide back and forth on the guide rail frame 601. The water pump can be connected to the water tank or pool through the water pipe, and water enters from the inlet 605 and is output from the outlet 904 of the cleaning head 901 to the glass window 505. The silicone squeegee 902 and the brush 903 are used to scrape back and forth on the glass window 505 to clean the dust on the surface of the glass window 505, ensuring the imaging quality of the high-frequency industrial line scan camera 4.

[0033] Further reference Figure 9 As shown, the coding positioning component 7 includes a fixed base 701, a connecting arm 702, a counting wheel 703, an encoder 704, and a tension spring 705. The fixed base 701 is fixedly connected to the frame 1. The fixed base 701 is skeletally connected to the connecting arm 702. One end of the connecting arm 702 is skeletally connected to the rotatable counting wheel 703. The encoder 704 is mounted on the connecting arm 702 and is connected to the counting wheel 703. A tension spring 705 is connected between the fixed base 701 and the connecting arm 702 so that the counting wheel 703 abuts against the lower surface of the belt 2.

[0034] In this embodiment, the coding and positioning component 7 is squarely mounted on the frame 1 near the belt 2. The tension spring 705 causes the measuring wheel 703 to abut against the lower surface of the belt 2. During the rotation of the belt 2, the measuring wheel 703 will also rotate. The encoder 704 records the number of rotations of the measuring wheel 703 relative to the belt 2. When the equipment issues a tear detection warning signal, the encoder 704 can obtain the specific location of the defect in the belt 2 based on the number of rotations of the measuring wheel 703.

[0035] Further reference Figure 10 As shown, the electrical control cabinet 11 is equipped with a main control board 13, a light source controller 14, and a switch. The main control board 13 is electrically connected to the high-frequency industrial line scan camera 4, the self-cleaning device 6, and the coding positioning component 7. The light source controller 14 is electrically connected to the high-brightness coaxial light source component 5. The electrical control cabinet 11 is connected to a host computer 12 for communication. The host computer 12 is connected to the main control board 13 and the light source controller 14 through the switch. The high-frequency industrial line scan camera 4 transmits the image of the lower surface of the belt 2 to the host computer 12 through the switch. The host computer 12 has a built-in image recognition system to determine the actual state of the lower surface of the belt 2. When the high-frequency industrial line scan camera 4 detects a tear in the belt 2, the host computer 12 generates a chain signal, and the belt 2 stops running.

[0036] In this embodiment, the host computer 12 receives the image and the image recognition system in the host computer 12 recognizes the image. During the recognition process, it judges the abnormality of the belt 2. If the belt 2 is operating normally, the detection device only records the image and does not issue an alarm. If slight wear or cracks are found, the abnormality is recorded and an abnormality warning is issued. The tear position is also recorded by the meter wheel 703. If a large crack is found in the belt 2 and there is a risk of breakage, the belt 2 is forcibly stopped, an abnormality alarm is issued, and the tear position is recorded.

[0037] Image recognition systems include: The three-dimensional composite dataset is constructed by acquiring RGB images of the surface texture of belt 2 through a high-frequency industrial linear scan camera 4 deployed on the belt 2 transmission line, and acquiring depth data of the unevenness and height of the belt 2 surface through a scanner (such as a laser scanner) deployed on the rack 1. The RGB images and depth data are fused using spatiotemporal alignment multimodal fusion technology to construct a three-dimensional composite dataset that can contain texture, contour and height information, thereby reducing the interference of factors such as coal slime adhesion, oil stains and uneven lighting on the surface of belt 2 in the industrial environment on image recognition.

[0038] To improve recognition accuracy, a multi-scale feature pyramid network is introduced into the YOLOv7 (You Only Look Once Version 7) algorithm. By adaptively adjusting the convolution kernel size, the feature capture capability for millimeter-level fine cracks is enhanced. By adding an attention module to optimize the skip connection mechanism of the U-Net model, the recognition accuracy of crack boundary pixels is strengthened, false positives are reduced, and the problem of missed detection of small-sized tears is solved. The U-Net model can be used for the optimization of key structures of belt 2 tear.

[0039] Threshold adjustment automatically adjusts the tear recognition threshold by monitoring operating parameters such as belt speed and material load in real time. When the belt speed increases or the material particles increase in size, the threshold is dynamically adjusted synchronously to avoid image blurring caused by belt vibration and interference from false features caused by material impact on the recognition results, thereby further reducing the false alarm rate.

[0040] In summary, this invention provides an online belt tear detection device. A beam of light emitted from a high-brightness coaxial light source assembly 5 is refracted onto the lower surface of the belt 2 and reflected to a high-frequency industrial line scan camera 4 to form an image. The image is then recognized by a host computer 12 to determine the condition of the lower surface of the belt 2. A self-cleaning device 6 ensures the clarity of the image acquired by the high-frequency industrial line scan camera 4, improving the accuracy of detecting abnormal tears on the lower surface of the belt 2. The detection accuracy is increased to over 96%, and the response time is reduced to less than 100ms. Compared with existing technologies, this invention represents a significant technological breakthrough in terms of protection, adaptability, and early warning capabilities, effectively solving the problem of insufficient generalization ability in traditional belt tear detection scenarios.

[0041] The technical principles of the present invention have been described above with reference to specific embodiments, which are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments; all technical solutions falling within the scope of the present invention's concept are within its protection scope. Those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these will all fall within the protection scope of the present invention.

Claims

1. An online belt tear detection device, characterized in that, include: A frame, on which a transmission conveyor belt is provided; The mounting frame is located below the belt inside the frame. The mounting frame is equipped with a high-frequency industrial line scan camera and a high-brightness coaxial light source assembly. The high-frequency industrial line scan camera is located on one side of the high-brightness coaxial light source assembly. The light beam emitted by the high-brightness coaxial light source assembly is refracted to the lower surface of the belt and then reflected back to the high-frequency industrial line scan camera for imaging. A self-cleaning device is provided on the mounting bracket, and the self-cleaning device is located on one side of the high-brightness coaxial light source assembly; The frame is equipped with an encoding and positioning component, which is used to abut against the lower surface of the belt and record the displacement with the belt drive to realize the positioning of the belt tear position. An electrical control cabinet is provided on one side of the frame. The electrical control cabinet is electrically connected to a high-frequency industrial line scan camera, a high-brightness coaxial light source assembly, a self-cleaning device, and an encoding positioning assembly.

2. The online belt tear detection device according to claim 1, characterized in that, The mounting frame has a rotating swing bracket with a shaft connection at the center of both sides. A movable telescopic adjustable support arm is connected to the bottom surface of one side of the mounting frame. The end of the support arm is fixed to the mounting frame with a shaft connection.

3. The online belt tear detection device according to claim 2, characterized in that, The high-brightness coaxial light source assembly includes a refraction mirror, a semi-reflective lens, a light transmission mirror, and a light source module mounted on the mounting bracket. The semi-reflective lens is located above the refraction mirror, the light transmission mirror is located above the semi-reflective lens, the light source module is located on one side of the semi-reflective lens, and the light transmission mirror is located below the lower surface of the belt. The light source module emits a light beam that is refracted by the semi-reflective lens and reflected to the light transmission mirror to illuminate the lower surface of the belt, and then reflected back to the refraction mirror to a high-frequency industrial line scan camera for real-time monitoring of the belt surface condition.

4. The online belt tear detection device according to claim 3, characterized in that, The refracting mirror and the semi-reflective mirror are set at a 45-degree angle, and the light-transmitting mirror is set at an angle to prevent the light reflected from the belt from affecting the data acquisition of the high-frequency industrial line scan camera.

5. The online belt tear detection device according to claim 4, characterized in that, The self-cleaning device includes a guide rail, a sliding block, a lead screw, a motor, a cleaning component, and a water pump. The mounting frame is equipped with a guide rail, the guide rail is equipped with a sliding block, the sliding block is equipped with a motor, and a lead screw is provided on one side of the guide rail. The lead screw passes through the sliding block and is connected to the motor. A cleaning component extends from one end of the sliding block to drive the cleaning component for cleaning the outer surface of the lens. The mounting frame is equipped with a water pump, and the sliding block is equipped with a water inlet. The two ends of the water inlet are connected to the water pump and the cleaning component, respectively.

6. The online belt tear detection device according to claim 5, characterized in that, The cleaning assembly includes a cleaning head, a silicone squeegee, a brush, and a water outlet. The cleaning head is connected to one end of the sliding block. The cleaning head has two water outlets, and a brush is provided between the two water outlets. A silicone squeegee is provided on the outside of each of the two water outlets. The water outlets are connected to the water inlet.

7. The online belt tear detection device according to claim 6, characterized in that, A glass window is sealed and installed on the outer side of the light-transmitting mirror, and the silicone squeegee and brush rest against the glass window.

8. The online belt tear detection device according to claim 1, characterized in that, The coding and positioning assembly includes a fixed base, a connecting arm, a counting wheel, an encoder, and a tension spring. The fixed base is fixedly connected to the frame, and the connecting arm is skewingly connected to the fixed base. One end of the connecting arm is skewingly connected to a rotatable counting wheel. The encoder is mounted on the connecting arm and connected to the counting wheel. A tension spring is connected between the fixed base and the connecting arm so that the counting wheel abuts against the lower surface of the belt.

9. The online belt tear detection device according to any one of claims 1-8, characterized in that, The electrical control cabinet is equipped with a main control board and a light source controller. The main control board is electrically connected to a high-frequency industrial line scan camera, a self-cleaning device, and an encoding positioning component. The light source controller is electrically connected to a high-brightness coaxial light source component.

10. The online belt tear detection device according to claim 9, characterized in that, The electrical control cabinet is connected to a host computer. The high-frequency industrial line scan camera transmits the image of the lower surface of the belt to the host computer. The host computer has a built-in image recognition system to determine the actual state of the lower surface of the belt.

Images