Cylindrical transparent product feature detection device

Abstract

The invention relates to a cylindrical transparent product feature detection device. The cylindrical transparent product feature detection device comprises a tool table, a rotating mechanism, a smearing mechanism, an imaging mechanism and a control mechanism. The rotating mechanism is installed on the tool table and used for driving a product placed on the rotating mechanism to rotate. The smearing mechanism is installed on the tool table, located beside the rotating mechanism and used for smearing fluorescent paint on a product placed on the rotating mechanism. The imaging mechanism is mounted on the tool table, is aligned with the rotating mechanism and is used for imaging the product coated with the fluorescent paint; the control mechanism is electrically connected with the rotating mechanism, the smearing mechanism and the imaging mechanism and used for controlling the rotating mechanism, the smearing mechanism and the imaging mechanism. Compared with the prior art, the method not only can detect whether defects exist, but also can accurately judge the types, sizes and positions of the defects, so that the defect detection capability is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of detection equipment, and in particular to a cylindrical transparent product feature detection device. Background Art

[0002] In the field of industrial manufacturing, the inspection and feature recognition of transparent cylindrical products have always been a technical difficulty. Due to the high transparency of this type of workpiece, the surface features are difficult to be clearly captured by traditional 2D vision cameras, especially the subtle differences between convexities and concave areas are difficult to identify. Traditional recognition methods often rely on expensive 3D vision cameras or line scan cameras. Now, with the development of artificial intelligence technology, technical means of using artificial intelligence image recognition technology for detection have begun to emerge. However, the accuracy of image recognition technology depends to a large extent on the advancement of the algorithm, which requires a lot of time and cost to train the model, and the input-output ratio is relatively low. In addition, some minor defects are not obvious in the image, and it is very easy to misjudge or miss, which cannot meet the needs of high precision. Summary of the invention

[0003] Based on this, the object of the present invention is to provide a cylindrical transparent product feature detection device.

[0004] A cylindrical transparent product feature detection device comprises a workbench, a rotating mechanism, a coating mechanism, an imaging mechanism and a control mechanism; the rotating mechanism is mounted on the workbench and is used to drive the product placed thereon to rotate; the coating mechanism is mounted on the workbench and is located next to the rotating mechanism and is used to coat the product placed on the rotating mechanism with fluorescent paint; the imaging mechanism is mounted on the workbench and is aligned with the rotating mechanism and is used to image the product coated with fluorescent paint; the control mechanism is electrically connected to the rotating mechanism, the coating mechanism and the imaging mechanism and is used to control the rotating mechanism, the coating mechanism and the imaging mechanism.

[0005] The cylindrical transparent product feature detection device described in the present invention applies fluorescent paint to the product surface by setting a rotating mechanism and a coating mechanism, and uses the luminous property of the fluorescent paint under ultraviolet light to detect product surface defects. Since the protrusions on the product surface will be coated with more fluorescent paint, and the depressions will be coated with less fluorescent paint, the position, size and type of defects on the product surface can be determined by analyzing the brightness distribution of the product surface. Compared with the prior art, the device described in the present invention can perform detection using fluorescent paint and ordinary imaging equipment, and the equipment cost is low; moreover, the present invention can not only detect the presence or absence of defects, but also accurately determine the type, size and position of defects, greatly improving the defect detection capability.

[0006] Furthermore, the workbench includes a table top and an equipment cabinet, the table top is provided with a penetrating equipment hole, and the equipment cabinet is fixedly connected under the table top; the rotating mechanism is installed in the equipment cabinet and connected to the table top, the rotating mechanism includes a fixed plate, a plurality of supporting columns, a turntable, a turntable rod and a driving member, one end of a plurality of the supporting columns is fixedly connected to the fixed plate, and the other end is fixedly connected to the bottom of the table top, the turntable is installed in the equipment hole of the table top, one end of the turntable rod is fixedly connected to the turntable, and the other end is drivingly connected to the driving member, and the driving member is fixedly connected to the fixed plate.

[0007] Furthermore, the number of the turntables and turntable rods is two, namely the first turntable, the second turntable and the first turntable rod, the second turntable rod, and the number of the equipment holes corresponding thereto is also two, namely the first equipment hole and the second equipment hole, and the rotating mechanism also includes a driven shaft, two synchronous wheels and a synchronous belt; the first turntable is installed in the first equipment hole, one end of the first turntable rod is fixedly connected to the first turntable, and the other end is fixedly connected to the driven shaft, and the driven shaft is rotatably installed on the fixed plate; the second turntable is installed in the second equipment hole, one end of the second turntable rod is fixedly connected to the second turntable, and the other end of the second turntable rod is drivingly connected to the driving member; the two synchronous wheels are respectively fixedly connected to the first turntable rod and the second turntable rod, and are connected through the synchronous belt transmission.

[0008] Furthermore, the rotating mechanism also includes a tensioning bracket, a tensioning slider and a tensioning top block. The tensioning bracket is fixed to the fixed plate and is located on the synchronous belt between the first turntable and the second turntable. The tensioning slider is slidably mounted on the tensioning bracket. The tensioning top block is fixed to the tensioning slider and abuts against the synchronous belt for adjusting the tension of the synchronous belt.

[0009] Furthermore, the driving component includes a driving motor, a reduction motor, a coupling and a driving shaft, the output end of the driving motor is drivingly connected to one end of the reduction motor, the other end of the reduction motor is drivingly connected to one end of the coupling, the other end of the coupling is drivingly connected to one end of the driving shaft, and the other end of the driving shaft is fixedly connected to one end of the second turntable rod away from the second turntable.

[0010] Furthermore, the imaging mechanism includes a base plate, a light source bracket, an ultraviolet light source, a camera bracket and an image sensor, the base plate is fixedly connected to the workbench, the light source bracket is mounted on the base plate, the ultraviolet light source is mounted on the light source bracket and aligned with the rotating mechanism, the camera bracket is mounted on the base plate, and the image sensor is mounted on the camera bracket and aligned with the rotating mechanism.

[0011] Furthermore, the number of the light source brackets and the ultraviolet light source is two, the two light source brackets are respectively installed on both sides of the base plate, the two ultraviolet light sources are respectively installed on the two light source brackets, and the camera bracket is located between the two light source brackets.

[0012] Furthermore, the imaging mechanism further comprises a background plate, which is fixed to the workbench and is located on a side of the rotating mechanism relative to the image sensor.

[0013] Furthermore, it also includes a clamping mechanism, which is installed on one side of the tooling table and is electrically connected to the control mechanism, and is used to clamp the product and place it on the rotating mechanism.

[0014] Furthermore, it also includes a first conveyor belt and a second conveyor belt, wherein the first conveyor belt is arranged at one end of the tooling table for conveying products to be inspected; and the second conveyor belt is arranged at the other end of the tooling table for conveying products that have completed inspection.

[0015] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cylindrical transparent product feature detection device of the present invention;

[0017] Figure 2 This is a schematic diagram of the rotating mechanism described in Example 1;

[0018] Figure 3 This is a schematic diagram of the imaging mechanism described in Example 1. DETAILED DESCRIPTION

[0019] See also Figure 1 A cylindrical transparent product feature detection device includes a workbench 1, a rotating mechanism 2, a coating mechanism 3, an imaging mechanism 4 and a control mechanism 5. The rotating mechanism 2 is mounted on the workbench 1, the coating mechanism 3 is also mounted on the workbench 1 and is located next to the rotating mechanism 2, the imaging mechanism 4 is mounted on the workbench 1 and is aligned with the rotating mechanism 2, and is used to image the product on the rotating mechanism 2. The control mechanism 5 is electrically connected to the rotating mechanism 2, the coating mechanism 3 and the imaging mechanism 4. The product is placed on the rotating mechanism 2 and rotated, while the coating mechanism 3 coats the product with fluorescent paint, the imaging mechanism 4 irradiates ultraviolet light to the product to make it glow, and records the image, and the control mechanism 5 detects and analyzes the image to determine the defects of the product.

[0020] Specifically, the workbench 1 includes a table top and an equipment cabinet. The table top is provided with a penetrating equipment hole for accommodating equipment extending from the bottom of the table top to the top of the table top; the equipment cabinet is fixedly connected under the table top to accommodate equipment that needs to be installed under the table top and provide support for the table top.

[0021] See also Figure 2 , the rotating mechanism 2 is installed in the equipment cabinet and connected to the table top, including a fixed plate 201, a plurality of support columns 202, a turntable 203, a turntable rod 204 and a driving member. One end of each of the support columns 202 is fixed to the fixed plate 201, and the other end is fixed to the bottom of the table top. The number of the support columns 202 is not limited, and it is only necessary to stably connect the fixed plate 201 and the table top so that the fixed plate 201 will not move relative to the table top. In this embodiment, the number of the support columns 202 is four, which are respectively fixed to the four corners of the fixed plate 201. The turntable 203 is installed in the equipment hole of the table top, one end of the turntable rod 204 is fixed to the bottom surface of the turntable 203, and the other end is drivingly connected to the driving member, and the driving member is installed below the fixed plate 201.

[0022] Preferably, the number of the rotating disk 203 and the rotating disk rod 204 is two, namely the first rotating disk, the second rotating disk and the first rotating disk rod, the second rotating disk rod, and the number of the equipment holes corresponding thereto is also two, namely the first equipment hole and the second equipment hole. In addition, the rotating mechanism 2 further comprises a driven shaft 205, two synchronous wheels 206 and a synchronous belt 207. The first rotating disk is installed in the first equipment hole, one end of the first rotating disk rod is fixed to the bottom surface of the first rotating disk, and the other end is fixed to the driven shaft 205, and the driven shaft 205 is rotatably installed on the fixed plate 201; the second rotating disk is installed in the second equipment hole, one end of the second rotating disk rod is fixed to the bottom surface of the second rotating disk, and the other end is drivingly connected to the driving member. The two synchronous wheels 206 are respectively fixed to the first rotating disk rod and the second rotating disk rod, and the two are located at the same height and are connected by the synchronous belt 207. The driving member drives the second rotating disk to rotate, and at the same time drives the first rotating disk to rotate together through the synchronous wheel 206 and the synchronous belt 207. In use, the product to be coated is placed on the first rotating disk for coating, and the coated product is placed on the second rotating disk for imaging, thereby improving the detection efficiency.

[0023] More preferably, the rotating mechanism 2 further includes a tensioning bracket 208, a tensioning slider 209 and a tensioning top block 210. The tensioning bracket 208 is fixedly connected to the fixed plate 201 and is located on the synchronous belt 207 between the first rotating disk and the second rotating disk. The tensioning slider 209 is slidably mounted on the tensioning bracket 208. The tensioning top block 210 is fixedly connected to the tensioning slider 209 and abuts against the synchronous belt 207. The tensioning top block 210 is driven to move by sliding the tensioning slider 209, so that the contact between the tensioning top block 210 and the synchronous belt 207 becomes more or less, thereby tightening or loosening the synchronous belt 207, thereby adjusting the tension of the synchronous belt 207 to avoid excessive wear caused by excessive tightening of the synchronous belt 207 or transmission slip caused by excessive loosening.

[0024] In this embodiment, the driving component includes a driving motor 211, a reduction motor 212, a coupling 213 and a driving shaft 214. The output end of the driving motor 211 is drivingly connected to the input end of the reduction motor 212, the output end of the reduction motor 212 is drivingly connected to one end of the coupling 213, the other end of the coupling 213 is drivingly connected to one end of the driving shaft 214, and the other end of the driving shaft 214 is fixedly connected to one end of the second turntable rod away from the second turntable.

[0025] The coating mechanism 3 is installed on the workbench 1 and is located next to the turntable 203, and is used to evenly apply fluorescent paint to the product placed on the turntable 203. The fluorescent paint itself is a transparent and colorless substance, and it will only emit visible light when irradiated with ultraviolet light. When applying the fluorescent paint, the coating mechanism 3 supplies the fluorescent paint at a constant speed, and the rotating mechanism 2 drives the product to rotate so that the fluorescent paint is evenly applied to the product. The raised defects on the surface of the product are in closer contact with the coating mechanism 3, so more fluorescent paint is applied; on the contrary, the concave defects on the surface of the product are not in sufficient contact with the coating mechanism 3, so less fluorescent paint is applied. When irradiated with an ultraviolet light source, the visible light emitted by the area with more fluorescent paint is brighter, and the visible light emitted by the area with less fluorescent paint is darker. Therefore, the position, size and type of the surface defects of the product can be determined by analyzing the brightness of the visible light.

[0026] See also Figure 3The imaging mechanism 4 includes a bottom plate 401, a light source bracket 402, an ultraviolet light source 403, a camera bracket 404 and an image sensor 405. The bottom plate 401 is fixedly connected to the workbench 1 and is located next to the rotating mechanism 2. The light source bracket 402 is fixedly connected to the bottom plate 401, the ultraviolet light source 403 is fixedly connected to the light source bracket 402 and is aligned with the position of the turntable 203 of the rotating mechanism 2, so that the ultraviolet light emitted by the ultraviolet light source 403 can completely illuminate the product placed on the turntable 203. The camera bracket 404 is fixedly connected to the bottom plate 401, the image sensor 405 is fixedly connected to the camera bracket 404 and is aligned with the position of the turntable 203 of the rotating mechanism 2, so that the image sensor 405 can accurately obtain the image of the product placed on the turntable 203. The ultraviolet light irradiates the product to make it glow, and at the same time, the rotating mechanism 2 drives the product to rotate, and the image sensor 405 obtains the product image in real time. When the product rotates one circle, all the image information of the product surface can be obtained.

[0027] Preferably, the number of the light source brackets 402 and the ultraviolet light sources 403 are both two, and the two light source brackets 402 are respectively fixed to the two sides of the base plate 401 and located on the two sides of the second turntable, and the two ultraviolet light sources 403 are respectively installed on the two light source brackets 402, so that the ultraviolet light emitted by the ultraviolet light sources 403 can be respectively irradiated on both sides of the product to achieve complete irradiation of the entire product.

[0028] More preferably, the imaging mechanism 4 further includes a background plate 406, which is fixed to the workbench and located on the side of the rotating mechanism 2 relative to the image sensor 405. By setting the background plate 406 as the background when acquiring the product image, the interference of the external environment on the product imaging can be well isolated, and it is easier to identify minor defects on the product. In order to improve the contrast effect between the background and the product, the background plate 406 is preferably a pure color such as black or white.

[0029] The control mechanism 5 is a device with computing and processing functions. In the present embodiment, the control mechanism 5 is a computer, which is installed with industrial control software for controlling the rotating mechanism 2, the coating mechanism 3 and the imaging mechanism 4, and image analysis software for parsing the product image acquired by the image sensor 405.

[0030] Preferably, the detection device further includes a clamping mechanism 6 for clamping the product and placing it on the rotating mechanism 2. The clamping mechanism 6 is installed on one side of the workbench 1 and is electrically connected to the control mechanism 5. In this embodiment, the clamping mechanism 6 is a robot. Through a pre-set working path or real-time detection execution, the robot clamps the product to be coated with fluorescent paint and places it in the first turntable, and clamps and places it in the second turntable after the product is coated, thereby realizing the automation of the entire process of product detection and reducing labor costs.

[0031] More preferably, the detection device further comprises a first conveyor belt 7 for conveying the product to be detected. The first conveyor belt 7 is arranged at one end of the tooling table 1 and close to the rotating mechanism 2, so as to facilitate the clamping and placement of the product in the rotating mechanism 2.

[0032] Furthermore, the detection device further comprises a second conveyor belt 8 for conveying the detected products. The second conveyor belt 8 is arranged at the other end of the tooling table 1. When the product is detected, it is clamped and placed on the second conveyor belt 8 and transported to the subsequent processing link.

[0033] When in use, the first conveyor belt 7 transports the product to be inspected, the clamping mechanism 6 clamps the product and places it on the first turntable, the driving member drives the turntable to rotate, and the coating mechanism 3 applies fluorescent paint to the product. The coating is completed when the product rotates one circle. The clamping mechanism 6 places the finished product on the second turntable, and places the next product to be inspected on the first turntable. The driving member drives the first turntable and the second turntable to rotate at the same time. The coating mechanism 3 coats the product on the first turntable, and the imaging mechanism 4 images the product on the second turntable. The imaging is completed after the product rotates one circle. At this time, the clamping mechanism 6 places the inspected product on the second conveyor belt 8, and the control mechanism 5 analyzes the product defects based on the imaged image. By looping the above process, the present invention realizes automated product defect detection.

[0034] Compared with the prior art, the present invention applies fluorescent paint to transparent cylindrical products by setting a coating mechanism, and uses the characteristics of fluorescent paint being colorless under visible light and emitting visible light under ultraviolet light to clearly show the tiny defects of transparent products. In addition, since the degree of contact between the convexities or concavities on the surface of the product and the coating mechanism is different during the coating process, the amount of fluorescent paint applied to the product is different, so the brightness of the visible light emitted under ultraviolet light is also different, which can distinguish the defect type of the product and realize comprehensive detection of the size, location and type of product defects.

[0035] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A cylindrical transparent product feature detection device, characterized in that: It includes a workbench, a rotating mechanism, a coating mechanism, an imaging mechanism and a control mechanism; the rotating mechanism is installed on the workbench and is used to drive the product placed thereon to rotate; the coating mechanism is installed on the workbench and is located next to the rotating mechanism, and is used to coat the product placed on the rotating mechanism with fluorescent paint; the imaging mechanism is installed on the workbench and is aligned with the rotating mechanism, and is used to image the product coated with fluorescent paint; the control mechanism is electrically connected to the rotating mechanism, the coating mechanism and the imaging mechanism, and is used to control the rotating mechanism, the coating mechanism and the imaging mechanism.

2. The cylindrical transparent product feature detection device according to claim 1, characterized in that: The workbench includes a table top and an equipment cabinet, the table top is provided with a penetrating equipment hole, and the equipment cabinet is fixedly connected under the table top; the rotating mechanism is installed in the equipment cabinet and connected to the table top, the rotating mechanism includes a fixed plate, a plurality of supporting columns, a turntable, a turntable rod and a driving member, one end of a plurality of the supporting columns is fixedly connected to the fixed plate, and the other end is fixedly connected to the bottom of the table top, the turntable is installed in the equipment hole of the table top, one end of the turntable rod is fixedly connected to the turntable, and the other end is drivingly connected to the driving member, and the driving member is fixedly connected to the fixed plate.

3. The cylindrical transparent product feature detection device according to claim 2, characterized in that: The number of the turntables and turntable rods is two, namely the first turntable, the second turntable and the first turntable rod, the second turntable rod, and the number of the equipment holes corresponding thereto is also two, namely the first equipment hole and the second equipment hole, and the rotating mechanism also includes a driven shaft, two synchronous wheels and a synchronous belt; the first turntable is installed in the first equipment hole, one end of the first turntable rod is fixedly connected to the first turntable, and the other end is fixedly connected to the driven shaft, and the driven shaft is rotatably installed on the fixed plate; the second turntable is installed in the second equipment hole, one end of the second turntable rod is fixedly connected to the second turntable, and the other end of the second turntable rod is drivingly connected to the driving member; the two synchronous wheels are respectively fixedly connected to the first turntable rod and the second turntable rod, and are connected through the synchronous belt transmission.

4. The cylindrical transparent product feature detection device according to claim 3, characterized in that: The rotating mechanism also includes a tensioning bracket, a tensioning slider and a tensioning top block. The tensioning bracket is fixed to the fixed plate and is located on the synchronous belt between the first turntable and the second turntable. The tensioning slider is slidably mounted on the tensioning bracket. The tensioning top block is fixed to the tensioning slider and abuts against the synchronous belt for adjusting the tension of the synchronous belt.

5. The cylindrical transparent product feature detection device according to any one of claims 2 to 4, characterized in that: The driving component includes a driving motor, a reduction motor, a coupling and a driving shaft. The output end of the driving motor is drivingly connected to one end of the reduction motor, the other end of the reduction motor is drivingly connected to one end of the coupling, the other end of the coupling is drivingly connected to one end of the driving shaft, and the other end of the driving shaft is fixedly connected to one end of the second turntable rod away from the second turntable.

6. The cylindrical transparent product feature detection device according to claim 1, characterized in that: The imaging mechanism includes a base plate, a light source bracket, an ultraviolet light source, a camera bracket and an image sensor. The base plate is fixedly connected to the workbench, the light source bracket is mounted on the base plate, the ultraviolet light source is mounted on the light source bracket and aligned with the rotating mechanism, the camera bracket is mounted on the base plate, and the image sensor is mounted on the camera bracket and aligned with the rotating mechanism.

7. The cylindrical transparent product feature detection device according to claim 6, characterized in that: The number of the light source brackets and the number of the ultraviolet light sources are both two, the two light source brackets are respectively installed on the two sides of the base plate, the two ultraviolet light sources are respectively installed on the two light source brackets, and the camera bracket is located between the two light source brackets.

8. The cylindrical transparent product feature detection device according to any one of claims 6 or 7, characterized in that: The imaging mechanism further comprises a background plate, which is fixed on the tooling table and is located on a side of the rotating mechanism relative to the image sensor.

9. The cylindrical transparent product feature detection device according to claim 1, characterized in that: It also includes a clamping mechanism, which is installed on one side of the tooling table and is electrically connected to the control mechanism, and is used to clamp the product and place it on the rotating mechanism.

10. The cylindrical transparent product feature detection device according to claim 1, characterized in that: It also includes a first conveyor belt and a second conveyor belt. The first conveyor belt is arranged at one end of the tooling table to convey the products to be inspected; the second conveyor belt is arranged at the other end of the tooling table to convey the products that have been inspected.

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