Surface cleanliness monitoring device

Abstract

The utility model relates to the field of strip steel surface cleanliness monitoring, and discloses a surface cleanliness monitoring device which comprises two monitoring mechanisms, strip steel, a first turning roller and a second turning roller, and each monitoring mechanism comprises a bottom plate, two square columns, two rectangular grooves, two lead screws, a translation block and two rotating shafts. And the strip steel is rotationally arranged on the surfaces of the first turning roller and the second turning roller in a covering manner. According to the utility model, the two first motors drive the screw rod to drive the translation block which is in threaded sleeve connection with the screw rod, so that the camera can move back and forth, and the camera can move up and down by utilizing the shortening and extension of the four electric telescopic rods, so that the flexibility and accuracy of monitoring are improved; meanwhile, a plurality of light sources are symmetrically and annularly arranged on the center of the outer ring of the camera lens, so that the maximum utilization and the uniformity of illumination light rays are ensured, the image quality and the monitoring precision are effectively improved, and a powerful guarantee is provided for efficient monitoring of the surface cleanliness of the strip steel.

Description

Technical Field

[0001] This utility model relates to the field of surface cleanliness monitoring of steel strips, and more particularly to surface cleanliness monitoring equipment. Background Technology

[0002] Currently, monitoring the cleanliness of steel strip surfaces mainly relies on two methods: one is to wipe the strip with a paper towel during high-speed operation, compare the color with a standard, and then conduct a visual assessment. This method not only carries operational risks but also relies on subjective judgment, making it difficult to guarantee accuracy and consistency. The other method involves observing the light transmittance of the strip after it is covered with tape during welding to infer the reflectivity of the strip surface and thus determine its cleanliness. Both methods share the drawback of using sampling rather than continuous monitoring and relying on indirect assessment methods. They cannot provide real-time, accurate, and continuous cleanliness data, thus failing to provide timely and effective basis for decision-making in the production process.

[0003] A search revealed an existing patent (publication number: CN210269652U) that discloses an "online surface cleanliness monitoring system, comprising: a high-speed industrial camera, which is positioned on the front and back of a strip steel conveyed on a strip steel production line to capture images of the surface of the strip steel conveyed on the production line; an industrial camera lens mounted on the high-speed industrial camera for adjusting the focal length of the high-speed industrial camera; an image processing module connected to the high-speed industrial camera for preprocessing the images captured by the high-speed industrial camera and sending them to an industrial control computer; and an industrial control computer connected to the image processing module for identifying the cleanliness of the strip steel surface based on the images received from the image processing module. This invention can achieve automated monitoring of metal surfaces such as strip steel."

[0004] In the process of developing this application, the inventors discovered the following problems with the prior art: Although the aforementioned comparative patent provides an online surface cleanliness monitoring system by setting up components such as a high-speed industrial camera, an industrial camera lens, an image processing module, and an industrial control computer, the illumination angle of the light source and the shooting angle of the camera need to be adjusted separately to match each other, and this adjustment process needs to be simplified. Therefore, those skilled in the art have provided a surface cleanliness monitoring device to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a surface cleanliness monitoring device. This device uses two first motors to drive lead screws, which in turn drive translation blocks threaded onto the lead screws to move the camera forward and backward. It also utilizes four electric telescopic rods to shorten and extend, thereby moving the camera up and down. This improves the flexibility and accuracy of monitoring. At the same time, multiple light sources are arranged in a symmetrical ring around the outer edge of the camera lens to ensure maximum utilization and uniformity of illumination light, effectively improving image quality and monitoring accuracy. This provides a strong guarantee for the efficient monitoring of the surface cleanliness of steel strips.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a surface cleanliness monitoring device, comprising two monitoring mechanisms, a strip steel, a first steering roller, and a second steering roller. Each of the two monitoring mechanisms includes a base plate, two square columns, two rectangular grooves, two lead screws, a translation block, a rotating shaft, and multiple industrial high-speed cameras. The strip steel is rotatably mounted on the surfaces of the first steering roller and the second steering roller. The two base plates are respectively fixed to the strip steel at a lower position behind the first steering roller and a lower position behind the second steering roller by bolts through bolt holes opened near their four corners.

[0007] Furthermore, the four square pillars are respectively fixedly installed on the upper part of the two base plates near the middle of both sides, and the four rectangular slots are respectively opened on the inner side of the four square pillars near the middle of the upper side.

[0008] Furthermore, the four lead screws are respectively rotatably positioned between the front and rear end centers of the four rectangular slots, and the rear ends of the four lead screws respectively penetrate through the rear end centers of the four rectangular slots.

[0009] Furthermore, the two lead screws within the same monitoring mechanism are connected near the rear end via a timing belt and a timing pulley.

[0010] Furthermore, a first motor is fixedly installed at the upper rear end of each of the two square columns on one side, and the output ends of the two first motors are respectively connected to the rear end of the lead screw on the same side via a synchronous belt and a synchronous pulley.

[0011] Furthermore, the two translation blocks are slidably disposed in the two rectangular slots within the same monitoring mechanism via protrusions on both sides, and the protrusions on both sides of the two translation blocks are threadedly connected to the lead screws on both sides.

[0012] Furthermore, each of the two translation blocks has two electrically operated telescopic rods fixedly mounted symmetrically at its lower end. A first connecting block is fixedly mounted at the center of the lower end of one of the electrically operated telescopic rods, and a second connecting block is fixedly mounted at the center of the lower end of the other electrically operated telescopic rod. The two rotating shafts are respectively rotatably mounted between the center of the first connecting block and the center of the second connecting block within the same monitoring mechanism. A second motor is fixedly mounted on the outer side of each of the two second connecting blocks via a bracket. One end of each of the two rotating shafts passes through the two second connecting blocks and is connected to the output end of the two second motors via a synchronous belt and a synchronous pulley.

[0013] Furthermore, a connecting rod is fixedly provided at the center of the front end of each of the two rotating shafts, and a horizontal plate is fixedly provided at the front end of each of the two connecting rods. Multiple industrial high-speed cameras are respectively fixedly provided at the front end of the two horizontal plates, and multiple light sources are fixedly provided around the lens opening at the front end of each of the multiple industrial high-speed cameras.

[0014] This utility model has the following beneficial effects:

[0015] 1. The surface cleanliness monitoring device proposed in this utility model uses multiple industrial high-speed cameras to capture images from both the front and back of the strip steel production line, ensuring monitoring of both sides of the strip steel. Simultaneously, images are captured from positions with minimal vibration on the strip steel production line to obtain high-quality images, which helps improve image clarity and accuracy, thereby enhancing the accuracy of defect detection. As needed, two second motors can drive two rotating shafts respectively, causing the connected multiple industrial high-speed cameras to rotate, changing the angle between the shooting direction and the normal to the surface of the strip steel production line. Real-time adjustments are made to ensure the system consistently acquires high-quality images. The shooting angle is adjusted in real-time according to different monitoring needs and environmental conditions, effectively improving the flexibility of monitoring and image quality.

[0016] 2. The surface cleanliness monitoring device proposed in this utility model uses two first motors to drive two lead screws on the same side, which in turn drive two translation blocks connected to the protrusions on both sides to slide smoothly in rectangular grooves on both sides. This allows multiple industrial high-speed cameras to move closer to or further away from the surface of the strip steel production line, overcoming the limitations of the zoom capability of multiple industrial high-speed cameras themselves, effectively improving the flexibility and adaptability of monitoring. Four electric telescopic rods can be extended or shortened according to actual needs, driving multiple industrial high-speed cameras to change the monitoring position in the vertical direction and adjusting the monitoring height according to actual needs, ensuring the comprehensiveness and accuracy of monitoring.

[0017] 3. The surface cleanliness monitoring device proposed in this utility model fixes multiple light sources in a centrally symmetrical ring around the outer edge of the lenses of multiple industrial high-speed cameras. This ensures that the illumination angle of the multiple light sources is always the same as the shooting angle of the multiple industrial high-speed cameras, maximizing the utilization of the illumination light and effectively avoiding the problem of unclear images caused by insufficient light. At the same time, it ensures the uniformity of illumination, which helps to improve image quality and monitoring accuracy. By providing uniform and efficient illumination to the strip steel surface, it provides a strong guarantee for obtaining high-quality monitoring images. Attached Figure Description

[0018] Figure 1 This is an isometric schematic diagram of the present invention;

[0019] Figure 2 This is a side view of the present invention;

[0020] Figure 3 This is an isometric schematic diagram of the monitoring mechanism of this utility model;

[0021] Figure 4 This is an isometric schematic diagram of the monitoring mechanism of this utility model when viewed from the rear.

[0022] Figure 5 This is an isometric schematic diagram of the translation block and two lead screws of this utility model.

[0023] Legend:

[0024] 1. Monitoring mechanism; 2. Strip steel; 3. First steering roller; 4. Second steering roller; 101. Base plate; 102. Square column; 103. Rectangular groove; 104. Lead screw; 105. Translation block; 106. First motor; 107. Electric telescopic rod; 108. First connecting block; 109. Second connecting block; 110. Second motor; 111. Rotating shaft; 112. Connecting rod; 113. Horizontal plate; 114. Industrial high-speed camera; 115. Light source. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 , Figure 2 and Figure 3An embodiment of the present invention provides a surface cleanliness monitoring device, comprising two monitoring mechanisms 1, a strip steel 2, a first steering roller 3, and a second steering roller 4. Each of the two monitoring mechanisms 1 includes a base plate 101, two square columns 102, two rectangular grooves 103, two lead screws 104, a translation block 105, a rotating shaft 111, and multiple industrial high-speed cameras 114. The strip steel 2 is rotatably mounted on the surfaces of the first steering roller 3 and the second steering roller 4. The two base plates 101 are respectively fixed to the strip steel 2 at a lower position behind the first steering roller 3 and at a lower position behind the second steering roller 4 by bolts through bolt holes opened near the four corners.

[0027] Specifically, multiple industrial high-speed cameras 114 in the two monitoring agencies 1 respectively cover the tangent position between the strip steel production line 2 and the first steering roller 3, as well as the tangent position between the strip steel production line 2 and the second steering roller 4. While ensuring the monitoring of the front and back sides of the strip steel 2, high-quality images are captured from the position with the least vibration of the strip steel production line 2.

[0028] The image is divided into 0-255 gray levels from dark to light. Multiple industrial high-speed cameras 114 capture the gray levels of the strip steel 2 surface from both the front and back of the strip steel 2 production line. The areas with defects on the strip steel 2 surface will have certain differences in gray levels compared to the surrounding clean areas. The system detects the defects on the surface of the strip steel 2 based on the differences in gray levels. The system classifies the defects based on their area, shape, and other features through deep learning algorithms. The defect classification of the surface cleanliness online monitoring system currently includes white spots, black spots, black stains, horizontal lines, and vertical lines. The target to be measured is converted into an image signal by the image acquisition device and transmitted to the dedicated system to be converted into a digital signal. The dedicated system uses various algorithms to extract the target features from these signals.

[0029] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 Four square columns 102 are fixedly installed on the upper part of the two base plates 101 near the middle of both sides. Four rectangular slots 103 are opened on the inner side of the four square columns 102 near the middle of the upper side. Four lead screws 104 are rotatably installed between the front and rear center of the four rectangular slots 103. The rear end of the four lead screws 104 passes through the rear center of the four rectangular slots 103. The two lead screws 104 in the same monitoring mechanism 1 are connected near the rear end by a synchronous belt and a synchronous pulley.

[0030] Two square columns 102 on one side are fixedly equipped with first motors 106 at the upper rear end. The output ends of the two first motors 106 are connected to the rear end of the lead screw 104 on the same side through synchronous belts and synchronous pulleys, respectively. Two translation blocks 105 are slidably set into the two rectangular slots 103 in the same monitoring mechanism 1 through the protrusions on both sides. The protrusions on both sides of the two translation blocks 105 are threaded and connected to the lead screw 104 on both sides.

[0031] Two electric telescopic rods 107 are fixedly mounted on the lower ends of the two translation blocks 105 in an axisymmetric manner. A first connecting block 108 is fixedly mounted at the center of the lower end of one electric telescopic rod 107, and a second connecting block 109 is fixedly mounted at the center of the lower end of the other electric telescopic rod 107. Two rotating shafts 111 are respectively rotatably mounted between the centers of the first connecting block 108 and the second connecting block 109 in the same monitoring mechanism 1. A second motor 110 is fixedly mounted on the outer side of each of the two second connecting blocks 109 by a bracket. One end of each of the two rotating shafts 111 passes through the two second connecting blocks 109 and is connected to the output end of the two second motors 110 by a synchronous belt and a synchronous pulley.

[0032] A connecting rod 112 is fixedly installed at the front center of each of the two rotating shafts 111, and a horizontal plate 113 is fixedly installed at the front end of each of the two connecting rods 112. Multiple industrial high-speed cameras 114 are fixedly installed at the front end of the two horizontal plates 113 respectively, and multiple light sources 115 are fixedly installed around the lens opening at the front end of the multiple industrial high-speed cameras 114.

[0033] Specifically, both base plates 101 have built-in PLC modules. The two first motors 106 and the two second motors 110 are electrically connected to the two PLC modules respectively. The two PLC modules are wirelessly connected to the external control network. In use, according to actual needs, the two first motors 106 can drive the two lead screws 104 on the same side respectively. The two lead screws 104 connected by the synchronous belt and synchronous pulley in the same monitoring mechanism 1 rotate in the same direction, driving the two translation blocks 105, which are threaded to the four lead screws 104 through the protrusions on both sides respectively, to slide forward or backward in the rectangular grooves 103 on both sides, thereby driving the multiple industrial high-speed cameras 114 below to approach or move away from the surface of the strip steel 2 production line, effectively overcoming the limitation of the zoom capability of the multiple industrial high-speed cameras 114 themselves.

[0034] The two electric telescopic rods 107 in the same monitoring mechanism 1 can be extended or shortened as needed, thereby effectively driving the multiple industrial high-speed cameras 114 below to descend or rise, changing the monitoring position on the surface of the strip steel production line 2 in the vertical direction. The other two second motors 110 can drive the two rotating shafts 111 to rotate the multiple industrial high-speed cameras 114 connected to them, changing the shooting direction of the multiple industrial high-speed cameras 114 and the angle between the normal to the surface of the strip steel production line 2 as needed, and adjusting in real time to ensure that the system always obtains high-quality images.

[0035] Multiple light sources 115 are fixedly arranged in a centrally symmetrical ring at the outer edge of the lens of multiple industrial high-speed cameras 114, ensuring that the illumination angle of the multiple light sources 115 is always the same as the shooting angle of the multiple industrial high-speed cameras 114, thereby ensuring the maximum utilization of the illumination light and effectively avoiding the problem of unclear images caused by insufficient light.

[0036] Working principle: Multiple industrial high-speed cameras 114 in the two monitoring mechanisms 1 respectively cover the tangent position between the strip steel production line 2 and the first steering roller 3, as well as the tangent position between the strip steel production line 2 and the second steering roller 4. While ensuring the monitoring of the front and back sides of the strip steel 2, high-quality images are obtained by taking pictures from the position with the least vibration of the strip steel production line 2. The multiple industrial high-speed cameras 114 respectively take pictures of the grayscale of the strip steel 2 surface from the front and back sides of the strip steel production line 2. The area with defects on the surface of the strip steel 2 will have a certain difference in grayscale compared with the surrounding clean area. The system detects the defects on the surface of the strip steel 2 based on the difference in grayscale.

[0037] Secondly, the two first motors 106 can drive the two lead screws 104 on the same side respectively. The two lead screws 104 connected by the synchronous belt and synchronous pulley in the same monitoring mechanism 1 rotate in the same direction, driving the two translation blocks 105, which are threadedly connected to the four lead screws 104 through the protrusions on both sides, to slide forward or backward in the rectangular grooves 103 on both sides, thereby driving the multiple industrial high-speed cameras 114 below to approach or move away from the surface of the strip steel 2 production line, effectively overcoming the limitation of the zoom capability of the multiple industrial high-speed cameras 114 themselves.

[0038] Finally, the two electric telescopic rods 107 within the same monitoring mechanism 1 can be extended or shortened as needed, thereby effectively driving the multiple industrial high-speed cameras 114 below to descend or rise, changing the monitoring position on the surface of the strip steel production line 2 in the vertical direction. At the same time, the two second motors 110 can drive the two rotating shafts 111 respectively to rotate the multiple connected industrial high-speed cameras 114, changing the angle between the shooting direction of the multiple industrial high-speed cameras 114 and the normal of the surface of the strip steel production line 2 as needed, adjusting in real time to ensure that the system always obtains high-quality images. In addition, multiple light sources 115 are respectively centrally symmetrically and fixedly arranged in a ring at the outer edge of the lens of the multiple industrial high-speed cameras 114, ensuring that the illumination angle of the multiple light sources 115 is always the same as the shooting angle of the multiple industrial high-speed cameras 114, thereby ensuring the maximum utilization of the lighting light. The PLC module is an existing structure, and the control circuit can be implemented by a person skilled in the art through simple programming. It is common knowledge in the field. In this application, it is only used and not modified. Therefore, the control method and circuit connection will not be described in detail. The above-mentioned use of equipment varies from device to device. It is selected and used according to actual needs, and various parameters are referenced to correspond to the function of the equipment used and the effect achieved.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Surface cleanliness monitoring apparatus comprising two monitoring mechanisms (1), a strip (2), a first deflection roll (3) and a second deflection roll (4), characterized in that: Both the monitoring mechanisms (1) comprise a bottom plate (101), two square columns (102), two rectangular grooves (103), two lead screws (104), a translation block (105), a rotating shaft (111) and multiple industrial high-speed cameras (114), the strip steel (2) covers the surface of the first deflection roller (3) and the second deflection roller (4) which are rotationally arranged, two bottom plates (101) are fixedly arranged on the lower position behind the first deflection roller (3) and the second deflection roller (4) of the strip steel (2) respectively through the bolt holes arranged near the four corner positions thereof.

2. The surface cleanliness monitoring apparatus of claim 1, wherein: Four square columns (102) are fixedly arranged on the upper end of two bottom plates (101) near the middle positions of the two sides, and four rectangular grooves (103) are arranged on the inner side of four square columns (102) near the upper middle positions.

3. The surface cleanliness monitoring apparatus of claim 1, wherein: Four lead screws (104) are rotationally arranged between the front and rear end centers of four rectangular grooves (103), and the rear ends of four lead screws (104) respectively penetrate the rear end centers of four rectangular grooves (103).

4. The surface cleanliness monitoring apparatus of claim 1, wherein: The rod bodies near the rear end positions of two lead screws (104) in the same monitoring mechanism (1) are connected through synchronous belts and synchronous pulleys.

5. The surface cleanliness monitoring apparatus of claim 1, wherein: The rear upper positions of two square columns (102) on one side are fixedly provided with a first motor (106), and the output ends of two first motors (106) are connected to the rear positions of the rod bodies of the same side lead screw (104) through synchronous belts and synchronous pulleys.

6. The surface cleanliness monitoring apparatus of claim 1, wherein: Two translation blocks (105) are slidingly arranged in the interiors of two rectangular grooves (103) in the same monitoring mechanism (1) through the protrusions on the two sides, and the protrusions on the two sides of two translation blocks (105) are threadedly connected to the rod bodies of the two lead screws (104).

7. The surface cleanliness monitoring apparatus of claim 1, wherein: The lower ends of two translation blocks (105) are fixedly provided with two electric telescopic rods (107) in axial symmetry, the lower end center of the electric telescopic rod (107) on one side is fixedly provided with a first connecting block (108), the lower end center of the electric telescopic rod (107) on the other side is fixedly provided with a second connecting block (109), two rotating shafts (111) are rotationally arranged between the centers of the first connecting block (108) and the second connecting block (109) in the same monitoring mechanism (1), the outer sides of two second connecting blocks (109) are fixedly provided with a second motor (110) through a support, and one end of two rotating shafts (111) penetrates two second connecting blocks (109) and is connected to the output ends of two second motors (110) through synchronous belts and synchronous pulleys.

8. The surface cleanliness monitoring apparatus of claim 1, wherein: The front ends of two connecting rods (112) are fixedly provided with a cross plate (113), and multiple industrial high-speed cameras (114) are fixedly arranged on the front end positions of two cross plates (113), and multiple light sources (115) are fixedly arranged around the lens holes of the front ends of multiple industrial high-speed cameras (114).

Images