Belt detection device with self-cleaning function

Abstract

The utility model provides a belt detection device with a self-cleaning function in order to solve the technical problem that the belt detection device is difficult to realize continuous and accurate monitoring due to the defects that the existing method for cleaning the belt detection device does not have instantaneity, stubborn stains cannot be cleaned and the cleaning function is lost due to dust accumulation. Comprising a shell, a linear light source assembly, an industrial linear array camera, a glass window and a self-cleaning mechanism, the linear light source assembly and the industrial line-scan digital camera are arranged in the shell, an image of the belt is reflected to the industrial line-scan digital camera for imaging through the glass window by means of refraction of light, and the self-cleaning mechanism comprises a driving mechanism and a brush head which is connected with the working end of the driving mechanism and located on the outer surface of the glass window. The driving mechanism drives the brush head to transversely reciprocate along the outer surface of the glass window, and the outer surface of the glass window is deeply cleaned in cooperation with water spraying of the water outlet.

Description

A belt detection device with self-cleaning function Technical Field

[0001] This utility model relates to a belt detection device, specifically a belt detection device with a self-cleaning function. Background Technology

[0002] As a key auxiliary device supporting belt material transport, belt inspection devices are finding increasingly wider applications. These devices typically include a detection lens, a light source to illuminate the lens, and a detection information processing unit connected to the lens. However, because belt inspection devices often operate in harsh environments and are exposed to complex industrial conditions for extended periods, dust accumulation and condensation on the detection lens are common problems. These factors interfere with the lens's recognition function, increasing the difficulty of detection and hindering continuous and accurate monitoring. Consequently, this impacts the device's ability to promptly detect and address anomalies.

[0003] In current industry practice, to ensure accurate monitoring by belt inspection devices, it is often necessary to clean the inspection lens of the device regularly, or clean it according to the cleanliness of its surface. Cleaning methods mainly include manual lens disassembly for cleaning, cleaning with a blower, and installing cleaning brushes on the lens. However, manual lens disassembly for cleaning lacks immediacy, wasting manpower and affecting the operating efficiency of the inspection system. While using a blower can remove dust and debris from the lens, it cannot remove stubborn stains formed by the combination of moisture and dust on the lens surface, thus failing to thoroughly clean the lens. Although installing cleaning brushes can perform deep cleaning, the cleaning brushes will accumulate dust after long-term use, gradually losing their cleaning function, resulting in blurred images captured by the inspection lens, which in turn affects the accuracy of belt damage and tear detection, increasing the risk of false alarms or missed detections. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem that the cleaning method of the detection lens in the existing belt detection device is not timely, cannot clean stubborn stains, and loses its cleaning function due to the accumulation of dust, which makes it difficult for the belt detection device to achieve continuous and accurate monitoring. Therefore, this invention provides a belt detection device with a self-cleaning function.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A belt detection device with self-cleaning function, which is special in that:

[0007] It includes a housing, a line light source assembly and an industrial line scan camera mounted inside the housing, as well as a glass window and a self-cleaning mechanism mounted on the housing;

[0008] The housing is made of opaque material, and the glass window is located at the top of the housing. Inside the housing, a semi-reflective lens is positioned in the light path of the line light source assembly to reflect the emitted light to the glass window. The glass window is located in the reflected light path of the semi-reflective lens and is used to provide illumination for the belt to be inspected. After the reflected light from the glass window illuminates the belt to be inspected, the beam carrying the image information of the belt is then incident on the semi-reflective lens again through the glass window. The industrial line scan camera is located in the transmitted light path of the semi-reflective lens and is used to acquire the image information of the belt to be inspected.

[0009] The self-cleaning mechanism includes a drive mechanism mounted on the housing, a brush head connected to the working end of the drive mechanism and located on the outer surface of the glass window, and a water delivery mechanism with the water outlet set on the brush head.

[0010] The industrial line scan camera, line light source assembly, drive mechanism, and water delivery mechanism are all electrically connected to an external control device.

[0011] Furthermore, considering that the temperature inside the housing increases due to the operation of the line light source assembly and industrial line scan camera inside the housing, the self-cleaning mechanism also includes an air supply mechanism. The air supply port of the air supply mechanism is located inside the housing and faces the inner surface of the glass window, which can effectively prevent the large temperature difference between the inside and outside of the glass window caused by the water spray from the brush head, thus preventing water mist from forming inside the housing.

[0012] Furthermore, the glass window has a rectangular structure, and the long side of the rectangular structure is the same as the width of the belt to be tested;

[0013] The drive mechanism includes a linear guide rail mounted on the housing, a slide table located on the linear guide rail, a lead screw mounted on the housing and parallel to the extension direction of the linear guide rail, and a hollow motor sleeved on the outside of the lead screw. The rotor end of the hollow motor is fixedly connected to the lead screw nut, which is sleeved on the lead screw. The stator end of the hollow motor is connected to the slide table, and the slide table constitutes the working end of the drive mechanism. The brush head is connected to the slide table.

[0014] The linear guide rail extends in the same direction as the long side of the glass window.

[0015] Furthermore, the angle between the side of the glass window surface away from the self-cleaning mechanism and the reflected light path of the semi-reflective lens is less than 90°, to prevent the semi-reflective lens from reflecting light onto the industrial line scan camera.

[0016] A water guide groove is provided on the housing between the glass window and the self-cleaning mechanism, which extends in the same direction as the long side of the glass window. This groove is used to guide the cleaning water to either side of the belt detection device, preventing water accumulation or cleaning water from entering the self-cleaning mechanism and affecting the normal operation of the device.

[0017] Furthermore, the angle between the side of the glass window surface away from the self-cleaning mechanism and the reflected light path of the semi-reflective lens is 60° to 68°, which can effectively cooperate with the brush head in the self-cleaning mechanism to clean the outer surface of the glass window.

[0018] Furthermore, the angle between the side of the glass window surface away from the self-cleaning mechanism and the reflected light path of the semi-reflective lens is 64°.

[0019] Furthermore, a refractor is provided in the transmission light path of the semi-reflective mirror to refract the transmission light beam carrying the image information of the belt to be inspected. The industrial line array camera is located in the refracted light path of the refractor to acquire the image information of the belt to be inspected.

[0020] Furthermore, the semi-reflective mirror is set at a 45° angle to the outgoing light path of the line light source assembly;

[0021] The refracting mirror is set at a 45° angle to the transmitted light path of the semi-reflective lens, and its refracted light is directed toward the side away from the line light source assembly.

[0022] Furthermore, the brush head is fixed to the slide table via a connecting block. A row of brushes is arranged in the center of the brush head, with the brushes arranged perpendicular to the long side of the glass window. Rubber scrapers parallel to the brushes are provided on both sides of the brush head, which can remove stubborn stains. The water outlet is located between the brushes and the rubber scrapers.

[0023] Furthermore, the self-cleaning mechanism also includes limit sensors fixedly installed at both ends of the cable chain and the lead screw. The limit sensors are electrically connected to an external control device. A hollow motor and wires electrically connected to the limit sensors and the external control device are placed inside the cable chain. One end of the cable chain is connected to the housing, and the other end is connected to the slide table.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) This utility model uses light refraction to reflect the image of the belt through the glass window to the industrial line scan camera for imaging. The industrial line scan camera is set inside the belt transmission housing. This structure avoids the phenomenon of dust accumulation and condensation in the industrial line scan camera. There is no need to clean the industrial line scan camera. Only the glass window, which is the only part in contact with the outside world, needs to be cleaned. Compared with the industrial line scan camera, the glass window has a larger surface area and a flatter shape, making it easier to clean. The specific cleaning method is that the external control mechanism controls the drive mechanism to work, which drives the brush head to wipe the outer surface of the glass window. Water is delivered to the water outlet of the brush head through the water delivery mechanism, so that the water outlet sprays water. The brush head and the water outlet work together to clean the glass window. This technical solution reduces personnel input. It can not only achieve real-time cleaning, but also completely remove stubborn stains on the surface of the glass window, ensuring that the belt detection device can continuously and accurately monitor.

[0026] (2) When the linear light source assembly and industrial linear array camera inside the housing have been working for a long time, the temperature inside the housing will rise. Therefore, the self-cleaning mechanism of this utility model also includes an air supply mechanism. The air supply mechanism can effectively prevent the glass window from being exposed to cold water sprayed from the outlet due to contact with the outer surface of the glass window, which would cause a large temperature difference between the inside and outside of the glass window and generate water mist on the inner surface, thus affecting the detection environment of the belt detection device. This further improves the cleaning efficiency and ensures the stable operation of the device.

[0027] (3) The design of using a hollow motor sleeved on the lead screw in the slide assembly of this utility model not only reduces the size of the device and makes the device layout more compact, but also the gap between the stator end and the rotor end of the hollow motor is small, without the mechanical friction and resistance of traditional motors, which can achieve higher precision position control, that is, achieve full coverage of the glass window by the brush head and improve cleaning efficiency. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the structure of a belt detection device with self-cleaning function according to the present invention.

[0029] Figure 2 is a schematic diagram of the distribution of the high-brightness coaxial light source assembly in an embodiment of this utility model;

[0030] Figure 3 is a schematic diagram of the self-cleaning mechanism in an embodiment of this utility model;

[0031] Figure 4 is a schematic diagram of the brush head structure of the self-cleaning mechanism in an embodiment of this utility model.

[0032] In the diagram: 1-House, 2-Industrial line scan camera, 3-Glass window, 4-Self-cleaning mechanism, 5-Line light source assembly, 6-Semi-reflective lens, 7-Refracting mirror, 8-Brush head, 9-Linear guide rail, 10-Lead screw, 11-Hollow motor, 12-Drag chain, 13-Brush, 14-Rubber scraper, 15-Outlet. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] As shown in Figure 1, this embodiment provides a belt detection device with a self-cleaning function, including an opaque housing 1. A line light source assembly 5 and an industrial line scan camera 2 are installed inside the housing 1. A light-transmitting glass window 3 and a self-cleaning mechanism 4 are installed on the housing 1. As shown in Figure 2, a semi-reflective lens 6 is provided inside the housing 1, located on the light path of the line light source assembly 5. The glass window 3 is located on the reflected light path of the semi-reflective lens 6 and is located on the top of the housing 1. The emitted light from the emitting end of the line light source assembly is reflected and illuminated on the lower surface of the belt to be detected through the glass window 3 to provide illumination. The light beam carrying the image information of the belt to be detected is then incident on the semi-reflective lens 6 through the glass window 3. A refractor 7 is provided on the transmitted light path of the semi-reflective lens 6 to refract the transmitted light beam carrying the image information of the belt to be detected. The industrial line scan camera is located on the refracted light path of the refractor 7 to acquire the image information of the belt to be detected. The industrial line scan camera 2, the line light source assembly 5, and the self-cleaning mechanism 4 are all electrically connected to an external control device.

[0035] The glass window 3 is sealed to the housing 1 by a sealing strip and black structural adhesive. The lens of the glass window 3 is made of high-transparency optical ultra-white glass with a thickness of 5mm. A 5mm wide silk-screened black border is provided around the perimeter to prevent the surface from being scratched.

[0036] The self-cleaning mechanism 4 includes a linear guide rail 9 and a lead screw 10 mounted on the housing 1. The long side of the glass window 3 extends in the same direction as the linear guide rail 9. The lead screw 10 extends parallel to the linear guide rail 9. A hollow motor 11 is mounted on the outside of the lead screw 10. The rotor end of the hollow motor 11 is fixedly connected to the lead screw nut, which is mounted on the lead screw 10. The stator end of the hollow motor 11 is connected to a slide table, which is slidably connected to the linear guide rail 9. A limit sensor is fixedly mounted at each end of the linear guide rail 9, allowing the slide table to reciprocate along the direction of the linear guide rail. The slide table is fixedly connected to the brush head 8 via a slider. A row of brushes 13 is mounted at the center of the brush head 8. The direction of the brushes 13 is perpendicular to the long side of the glass window 3. Rubber scrapers 14 parallel to the brushes 13 are mounted on both sides of the brush head 8. A water outlet 15 is located between the brushes 13 and the rubber scrapers 14. A water pump is connected to the water outlet 15 via a water pipe.

[0037] The self-cleaning mechanism 4 also includes four fans, which are evenly and horizontally arranged inside the housing 1 and located on the side of the glass window 3 near the linear light source assembly 5. The airflow direction is directed toward the inner surface of the glass window by the air supply duct.

[0038] The semi-reflective mirror 6 is set at a 45° angle to the outgoing light path of the line light source assembly 5, and the end of the semi-reflective mirror 6 away from the line light source assembly 5 is higher than the other end; the refracting mirror 7 is set at a 45° angle to the transmitted light path of the semi-reflective mirror 6, and the mirror surface of the refracting mirror 7 is perpendicular to the mirror surface of the semi-reflective mirror 6.

[0039] The housing 1 is also connected to one end of the cable chain 12. The cable chain 12 contains the wires that connect the external control device to the hollow motor 11. The other end of the cable chain 12 is connected to the slide table, so that the wires move with the slide table and extend and retract in an orderly manner, avoiding the wires from being directly exposed to the outside and being damaged by pulling, abrasion, squeezing, etc., and is used to protect the wires.

[0040] The brush head 8 is connected to the brush 13 and the rubber scraper 14 by a mechanical snap-fit ​​connection, which enables the components to be quickly locked and separated, improves the efficiency of equipment maintenance and reconfiguration, and ensures that the equipment can be quickly restored to operation in the event of a failure.

[0041] The working principle of this embodiment is as follows:

[0042] The belt to be inspected moves on the top of the housing 1 via an external belt drive device. The external control device controls the output end of the line light source assembly 5 to emit high-brightness linear light. The high-brightness linear light is reflected by the semi-reflective lens 6 in the output light path of the line light source assembly 5 to the glass window 3. The reflected light passes through the glass window 3 and illuminates the lower surface of the belt to be inspected. The beam carrying the image information of the belt to be inspected then enters the semi-reflective lens 6 through the glass window 3. The semi-reflective lens 6 transmits the light to the refracting mirror 7. Finally, the refracting mirror 7 refracts the beam carrying the image information of the belt to be inspected to the industrial line scan camera 2 for imaging. The external control device processes the received image of the belt to be inspected and analyzes the tear, scratch and other features in the image data.

[0043] The self-cleaning mechanism 4 can clean the glass window 3 of the belt detection device in real time, enabling the belt detection device to continuously and accurately monitor:

[0044] Specifically, the duration of water spray at the outlet 15 can be set via an external control device. Then, the self-cleaning mode is activated, and the hollow motor 11, fan, and water pump all begin operation. The rotor of the hollow motor 11 rotates, converting the rotational motion of the lead screw 10 into the linear motion of the lead screw nut. This drives the slide table to move linearly along the linear guide rail 9. When the slide table moves to any end of the linear guide rail 9, it contacts the limit sensor, which sends feedback to the external control device. The external control device automatically controls the hollow motor 11 to change the rotation direction of its rotor, causing the slide table to move in the opposite direction, thus achieving reciprocating motion of the slide table along the linear guide rail 9. With each movement, the water sprayed from the outlet 15 can completely cover the surface of the glass window 3. At the same time, the brush 13 on the brush head 8 also wipes the surface of the glass window 3 as the slide moves. The rubber scraper 14 is in close contact with the glass window 3 and scrapes away water stains and dirt on the glass window 3 as the slide moves. The fan blows air towards the inner surface of the glass window 3 to prevent the temperature inside the housing 1 from rising due to the operation of the line light source assembly 5 and the industrial line scan camera 2. This would prevent water mist from forming on the inner surface of the glass window 3 after the outer surface of the glass window 3 comes into contact with the cold water sprayed from the outlet 15 due to the temperature difference between the inside and outside, which would affect the monitoring.

[0045] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the technical solution of this utility model should be included within the protection scope of this utility model. Furthermore, it should be noted that the accompanying drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the actual scope of protection claimed by this utility model.

Claims

1. A belt detection device with self-cleaning function, characterized in that: The device includes a housing (1), a line light source assembly (5) and an industrial line scan camera (2) installed inside the housing (1), and a glass window (3) and a self-cleaning mechanism (4) installed on the housing (1). The housing (1) is made of opaque material, and the glass window (3) is located on the top of the housing (1). A semi-reflective lens (6) is provided inside the housing (1) and is located on the light path of the line light source assembly (5). The glass window (3) is located on the reflected light path of the semi-reflective lens (6) and is used to provide an illumination source for the belt to be inspected. The reflected light emitted through the glass window (3) illuminates the belt to be inspected. Then, the beam carrying the image information of the belt to be tested is incident on the semi-reflective lens (6) through the glass window (3). The industrial line scan camera (2) is located in the transmitted light path of the semi-reflective lens (6) and is used to acquire the image information of the belt to be tested. The self-cleaning mechanism (4) includes a drive mechanism installed on the housing (1), a brush head (8) connected to the working end of the drive mechanism and located on the outer surface of the glass window (3), and a water supply mechanism with the water outlet set on the brush head (8). The industrial line scan camera (2), the line light source assembly (5), the drive mechanism and the water supply mechanism are all electrically connected to the external control device.

2. The belt detection device with self-cleaning function according to claim 1, characterized in that: The self-cleaning mechanism (4) also includes an air supply mechanism, the air supply port of which is located inside the housing (1) and faces the inner surface of the glass window (3).

3. The belt detection device with self-cleaning function according to claim 1, characterized in that: The glass window (3) is a rectangular structure, and the long side of the rectangular structure is consistent with the width of the belt to be tested. The driving mechanism includes a linear guide rail (9) set on the housing (1), a slide on the linear guide rail (9), a lead screw (10) installed on the housing (1) and parallel to the extension direction of the linear guide rail (9), and a hollow motor (11) sleeved on the outside of the lead screw (10). The rotor end of the hollow motor (11) is fixedly connected to the lead screw nut, and the lead screw nut is sleeved on the lead screw (10). The stator end of the hollow motor (11) is connected to the slide. The slide constitutes the working end of the driving mechanism. The brush head (8) is connected to the slide. The extension direction of the linear guide rail (9) is consistent with the extension direction of the long side of the glass window (3).

4. A belt detection device with self-cleaning function according to claim 1, characterized in that: The angle between the side of the glass window (3) away from the self-cleaning mechanism (4) and the reflected light path of the semi-reflective lens (6) is less than 90°; a water guide groove is provided on the housing (1) between the glass window (3) and the self-cleaning mechanism (4) in the same direction as the long side of the glass window (3).

5. A belt detection device with self-cleaning function according to claim 4, characterized in that: The angle between the side of the glass window (3) away from the self-cleaning mechanism (4) and the reflected light path of the semi-reflective lens (6) is 60° to 68°.

6. A belt detection device with self-cleaning function according to claim 5, characterized in that: The angle between the side of the glass window (3) away from the self-cleaning mechanism (4) and the reflected light path of the semi-reflective lens (6) is 64°.

7. A belt detection device with self-cleaning function according to claim 1, characterized in that: A refractor (7) is provided on the transmission light path of the semi-reflective mirror (6) to refract the transmission light beam carrying the image information of the belt to be tested. The industrial line array camera (2) is located on the refracted light path of the refractor (7) to acquire the image information of the belt to be tested.

8. A belt detection device with self-cleaning function according to claim 7, characterized in that: The semi-reflective mirror (6) is set at a 45° angle to the outgoing light path of the line light source assembly (5); the refracting mirror (7) is set at a 45° angle to the transmitted light path of the semi-reflective mirror (6), and its refracted light is directed toward the side away from the line light source assembly (5).

9. A belt detection device with self-cleaning function according to claim 1, characterized in that: The brush head (8) is fixed to the slide table by a connecting block. A row of brushes (13) is arranged in the center of the brush head (8). The direction of the brushes (13) is perpendicular to the long side of the glass window (3). Rubber scrapers (14) parallel to the brushes (13) are arranged on both sides of the brush head (8). The water outlet (15) is located between the brushes (13) and the rubber scrapers (14).

10. A belt detection device with self-cleaning function according to claim 3, characterized in that: The self-cleaning mechanism (4) also includes limit sensors fixedly installed at both ends of the drag chain (12) and the lead screw (10). The limit sensors are electrically connected to the external control device. A hollow motor (11) is placed inside the drag chain (12), and the wires for the limit sensors to be electrically connected to the external control device are placed inside the drag chain (12). One end of the drag chain (12) is connected to the housing (1), and the other end is connected to the slide table.

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