A new energy vehicle threshold beam quality inspection device based on visual inspection

Abstract

The present application belongs to the technical field of visual inspection equipment, and discloses a new energy vehicle threshold beam quality inspection equipment based on visual inspection, including a conveyor line and a detection part, the lighting system on the detection part includes a surface light source and a strip light source, and a camera module is fixedly installed in the middle of the top of the inner cavity of the detection part, and a group of rotating clamping components are respectively provided on the left and right sides of the middle of the inner cavity of the detection part, and a lifting cylinder is provided at the bottom of the inner cavity of the detection part. The present application provides a new energy vehicle threshold beam quality inspection equipment based on visual inspection, and the setting of the detection part and the structure thereon is effectively avoided by visual inspection to effectively avoid the defects existing in manual naked eye inspection. At the same time, two groups of pictures are taken by illumination at different positions for comparison, so as to eliminate the characteristic information of dust and other particulate impurities that appear in the pictures taken in the dark room due to illumination, thereby effectively improving the accuracy of the visual inspection equipment in extracting the surface characteristic information of the product.

Description

Technical Field

[0001] The present application relates to the technical field of visual inspection equipment, and in particular to a new energy vehicle door sill beam quality inspection device based on visual inspection. Background Art

[0002] As a component of the vehicle body, the threshold beam plays an important role in the overall structural strength and stability of the vehicle body. Therefore, in order to prevent quality problems such as missing rivets, missing holes, and missing accessories during the production process of the threshold beam, it is necessary to test the threshold beam after production to prevent defective products from entering the market.

[0003] Among them, the traditional inspection method is manual full inspection, and the manual visual inspection method requires relevant personnel to stay for a long time and carefully identify the defects of the product. However, this inspection method makes the labor intensity of the staff high in the large-scale production process, and it is difficult to maintain a high level of concentration for a long time, which affects the product yield;

[0004] Therefore, a visual inspection is provided in the existing technical means, which converts the surface of the product into image information by taking pictures, and converts the distribution, brightness and color of the pixels in the image into digital signals, thereby extracting the characteristic information of the product surface and judging whether there are defects.

[0005] However, existing visual inspection is performed in a darkroom and requires the use of light to illuminate the surface of the product for shooting. As a result, floating impurities such as dust in the air are reflected by light and appear in the darkroom. This is then recorded in the product's image information, greatly affecting the accuracy of extracting product surface information features. It is very easy to make a misdiagnosis and judge a good product as a defective product.

[0006] Therefore, there is an urgent need for a visual inspection device for automobile door sill beams to solve the defects existing in the above-mentioned existing visual inspection devices during actual operation. Summary of the invention

[0007] The present application proposes a new energy vehicle door sill beam quality inspection device based on visual inspection, which has the advantages of being able to effectively exclude dust features in product image information, having a high accuracy in extracting product surface features, and not prone to misdiagnosis and judging good products as defective products. It is used to solve the problem that the existing visual inspection is performed in a darkroom and requires light to be irradiated on the surface of the product for shooting, which causes floating impurities such as dust in the air to appear in the darkroom due to reflected light and be recorded in the product image information, greatly affecting its extraction accuracy for product surface information features and being prone to misdiagnosis.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a new energy vehicle threshold beam quality inspection equipment based on visual inspection, including a conveyor line and a detection part, the conveyor line runs through the interior of the detection part and extends to its front and rear sides, and at the same time, a lighting system and a camera module are provided inside the detection part, a group of lifting cylinders are respectively provided on the front and rear sides of the detection part, and a group of gates movably connected to the end face of the detection part are provided on the lifting cylinders, the lighting system on the detection part includes a surface light source and a strip light source, and a camera module is fixedly installed in the middle of the top end of the inner cavity of the detection part, a group of rotating clamping parts are respectively provided on the left and right sides of the middle of the inner cavity of the detection part, and at the same time, a lifting cylinder is provided at the bottom end of the inner cavity of the detection part.

[0009] Furthermore, the illumination system is divided into two parts, a first illumination system and a second illumination system, and the two illumination systems are respectively located on both sides of the top of the detection part and are controlled by a computer system to be staggered and triggered front and back, and take two sets of first and second images for comparison:

[0010] The light spots reflected by dust and other granular impurities appear. If the position of the light spots in the image moves, it indicates that it is floating impurities such as dust and is not extracted as feature information of the threshold beam surface;

[0011] If the light spot position in the image does not move, it indicates that it is characteristic information of the surface of the threshold beam, and extraction and judgment are performed to determine whether the threshold beam is a defective product.

[0012] Furthermore, the rotating clamping component on the left side includes a driven rotating component fixedly mounted on the left inner wall of the detection part, and a contour clamp is fixedly mounted on the driven rotating component, and a clamp cylinder for driving the contour clamp to perform a telescopic clamping action is provided on the driven rotating component, while the rotating clamping component on the right side includes an active rotating component fixedly mounted on the right inner wall of the detection part, and another group of contour clamps is fixedly mounted on the active rotating component, and another group of clamp cylinders for driving the other group of contour clamps to perform a telescopic clamping action is provided on the active rotating component, and then, under the power output of the active rotating component, the threshold beam clamped on the two groups of contour clamps can be driven to rotate.

[0013] Furthermore, a group of limiting push rods movably connected to the inner wall of the detection part are provided on the rotating clamping component located on the left side, and the limiting push rods are extended and retracted by cylinders.

[0014] Furthermore, a marking cylinder is provided on the left side of the inner cavity of the detection part, and a seal is fixedly installed above the marking cylinder.

[0015] Furthermore, the conveyor line is configured as a belt conveyor, and a profiling jig adapted to the threshold beam is provided thereon, and the profiling jig is made of polymer material to avoid scratching the surface of the threshold beam during transportation.

[0016] Furthermore, the conveying line, the detection part, the lifting cylinder, the rotating clamping component, and the limit push rod realize the PLC signal interaction function by sensors with different functions, and monitor the transportation status of the threshold beam on the conveying line in real time.

[0017] The present invention application has the following technical effects:

[0018] The present application provides a new energy vehicle threshold beam quality inspection device based on visual inspection. For the setting of the inspection part and the structure thereon, visual inspection is used to effectively avoid the defects existing in manual naked eye inspection. At the same time, two groups of pictures are taken by illumination at different positions for comparison, so as to eliminate the characteristic information of particulate impurities such as dust that appear in the pictures taken in the dark room due to illumination, thereby effectively improving the accuracy of the visual inspection device in extracting the surface characteristic information of the product, and good products will not be judged as defective products due to misdiagnosis, and the stability and reliability are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0020] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a front view of the structure of the present invention;

[0023] Figure 3 It is a cross-sectional view of the structure at AA of the present invention;

[0024] Figure 4 For the present invention Figure 2 The local structure diagram on the left;

[0025] Figure 5 The structure of the present invention Figure 5 Side view of

[0026] Figure 6 For the present invention Figure 2 The local structure diagram on the right;

[0027] Figure 7 It is a system diagram of the structure of the present invention.

[0028] In the figure: 1. Conveyor line; 2. Detection unit; 3. Door sill beam; 4. Surface light source; 5. Strip light source; 6. Camera module; 7. Driven rotating part; 8. Profiling fixture; 9. Fixture cylinder; 10. Active rotating part; 11. Lifting cylinder; 12. Gate; 13. Lifting cylinder; 14. Limiting push rod; 15. Marking cylinder. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] like Figure 1 , Figure 3 As shown, a new energy vehicle threshold beam quality inspection equipment based on visual inspection includes a conveyor line 1 and a detection part 2, the conveyor line 1 runs through the interior of the detection part 2 and extends to the front and rear sides thereof, at the same time, a lighting system and a camera module 6 are arranged inside the detection part 2, and the camera module 6 uses a 2000W camera with a pixel quality for inspection, at the same time, when it is in operation, a large surface light opening is used for lighting, and an auxiliary strip light is added on the side, and a black coating is arranged inside the inspection area, the conveyor line 1 is divided into a unloading position and a loading position on the left and right sides of its conveying direction, and under the action of the conveyor line 1, the threshold beam 3 is clamped on the conveyor line 1 at the loading position and transported to the interior of the detection part 2 for visual inspection, and after the inspection is completed, the threshold beam 3 on the conveyor line 1 is removed at the unloading position, as shown in FIG. Figure 2As shown, a group of lifting cylinders 11 are respectively provided on the front and rear sides of the detection part 2, and a group of gates 12 movably connected to the end face of the detection part 2 are provided on the lifting cylinders 11, and then when the threshold beam 3 inside the detection part 2 is visually inspected, the gates 12 can be lowered by the lifting cylinders 11 to form a dark room inside the detection part 2, and after the visual inspection of the threshold beam 3 inside the detection part 2 is completed, the gates 12 are lifted by the lifting cylinders 11 to ensure that the conveyor line 1 can operate normally and transport the threshold beam 3 thereon to the corresponding position, and the lighting system on the detection part 2 includes a surface light source 4 installed on the top of its inner cavity and a strip light source 5 installed in the middle of its inner cavity, and a light source for the threshold is fixedly installed in the middle of the top of the inner cavity of the detection part 2. The camera module 6 includes photo taking and video taking functions. A group of rotating clamping components are respectively provided on the left and right sides of the middle of the inner cavity of the detection part 2. At the same time, a lifting cylinder 13 is provided at the bottom end of the inner cavity of the detection part 2. Then, under the action of the lifting cylinder 13, the threshold beam 3 transported to the inner cavity of the detection part 2 through the conveyor line 1 can be lifted to a certain height, and then the threshold beam 3 is suspended and clamped by the rotating clamping component. At the same time, the lifting cylinder 13 is restored to its initial position to prevent interference with the rotation of the threshold beam 3. When the detection surface of the threshold beam 3 is rotated to be perpendicular to the camera module 6, visual inspection can be carried out, and image contrast, grayscale contrast and contour contrast can be used to determine whether the threshold beam 3 is a good product.

[0031] like Figure 7 As shown, in the present technical solution, the illumination system is divided into two parts, the first illumination system and the second illumination system, and the illumination systems of the two parts are respectively located on both sides of the top of the detection part 2 and are controlled by the computer system to be staggered and triggered front and back, and take two sets of first and second images for comparison:

[0032] If the light spot in the image is moved due to the reflection of light by dust or other granular impurities, it indicates that it is floating impurities such as dust and is not extracted as feature information of the surface of the threshold beam 3;

[0033] If the light spot position in the image does not move, it indicates that it is characteristic information of the surface of the threshold beam 3, and extraction and judgment are performed to determine whether the threshold beam 3 is a defective product.

[0034] like Figure 4-Figure 6As shown, in the present technical scheme, the left-side rotating clamping component includes a driven rotating member 7 fixedly mounted on the left inner wall of the detection part 2, and a profiling fixture 8 is fixedly mounted on the driven rotating member 7, and a fixture cylinder 9 for driving the profiling fixture 8 to perform a telescopic clamping action is provided on the driven rotating member 7, while the right-side rotating clamping component includes an active rotating member 10 fixedly mounted on the right inner wall of the detection part 2, and another group of profiling fixtures 8 is fixedly mounted on the active rotating member 10, and another group of fixture cylinders 9 for driving the other group of profiling fixtures 8 to perform a telescopic clamping action is provided on the active rotating member 10, and then, under the power output of the active rotating member 10, the threshold beam 3 clamped on the two groups of profiling fixtures 8 can be driven to rotate, and the surface to be detected of the threshold beam 3 can be rotated to be perpendicular to the camera module 6, so as to perform visual inspection operations.

[0035] like Figure 4 As shown, in the present technical solution, a group of limit push rods 14 movably connected to the inner wall of the detection part 2 are provided on the rotating clamping component located on the left side, and the limit push rods 14 are extended and retracted by the cylinder, and when the contour clamp 8 does not clamp the threshold beam 3, the limit push rods 14 are triggered and actuated, thereby ensuring that the movements of the rotating clamping components on the left and right sides remain consistent, and when the rotating clamping component on the left side does not clamp the threshold beam 3, the relative rotation movement will not occur under the action of gravity.

[0036] like Figure 3 As shown, in the present technical solution, a marking cylinder 15 is provided on the left side of the inner cavity of the detection part 2, and a seal is fixedly installed above the marking cylinder 15, and then when the visual inspection equipment detects a defective product of the threshold beam 3, the marking cylinder 15 is triggered to print a mark on the threshold beam 3, which is convenient for manual distinction, and when the conveyor line 1 is transported to the unloading area, the threshold beam 3 with the mark is placed at a designated position and isolated from the good product storage area to avoid mixing.

[0037] In the present technical solution, the conveyor line 1 is configured as a belt conveyor, and a profiling jig adapted to the threshold beam 3 is provided thereon, and the profiling jig is made of a polymer material to prevent the surface of the threshold beam 3 from being scratched during transportation, and the threshold beam 3 is manually placed on the profiling jig of the conveyor line 1, and then transported to the detection unit 2 via the conveyor line 1 for visual inspection.

[0038] In this technical solution, the conveyor line 1, the detection part 2, the lifting cylinder 11, the rotating clamping component, and the limit push rod 14 realize the PLC signal interaction function by sensors with different functions, and monitor the transportation status of the threshold beam 3 on the conveyor line 1 in real time.

Claims

1. A new energy vehicle threshold beam quality inspection device based on visual inspection, comprising a conveyor line (1) and a detection unit (2), wherein the conveyor line (1) runs through the interior of the detection unit (2) and extends to the front and rear sides thereof, and a lighting system and a camera module (6) are provided inside the detection unit (2), characterized in that: A group of lifting cylinders (11) are respectively provided on the front and rear sides of the detection part (2), and a group of gates (12) movably connected to the end surface of the detection part (2) are provided on the lifting cylinders (11). The lighting system on the detection part (2) includes a surface light source (4) and a strip light source (5), and a camera module (6) is fixedly installed in the middle of the top of the inner cavity of the detection part (2). A group of rotating clamping components are respectively provided on the left and right sides of the middle of the inner cavity of the detection part (2). At the same time, a lifting cylinder (13) is provided at the bottom end of the inner cavity of the detection part (2); The illumination system is divided into two parts, a first illumination system and a second illumination system, and the two illumination systems are respectively located on both sides of the top of the detection part (2) and are controlled by a computer system to be triggered in a staggered manner in front and back, and to take two sets of pictures, a first picture and a second picture, for comparison: If the position of the light spot in the image is moved due to the light reflected by the floating impurities, it indicates that it is a floating impurity and is not extracted as feature information of the surface of the threshold beam (3); If the light spot position in the image does not move, it indicates that it is characteristic information of the surface of the threshold beam (3), and extraction and judgment are performed to determine whether the threshold beam (3) is a defective product.

2. The new energy vehicle threshold beam quality detection device based on visual detection according to claim 1 is characterized in that: The left-side rotating clamping component comprises a driven rotating component (7) fixedly mounted on the left inner wall of the detection part (2), a profiling clamp (8) fixedly mounted on the driven rotating component (7), and a clamp cylinder (9) for driving the profiling clamp (8) to perform a telescopic clamping action is provided on the driven rotating component (7), while the right-side rotating clamping component comprises an active rotating component (10) fixedly mounted on the right inner wall of the detection part (2), another set of profiling clamps (8) fixedly mounted on the active rotating component (10), and another set of clamp cylinders (9) for driving the other set of profiling clamps (8) to perform a telescopic clamping action is provided on the active rotating component (10), so that the threshold beam (3) clamped on the two sets of profiling clamps (8) can be driven to rotate under the power output of the active rotating component (10).

3. The new energy vehicle threshold beam quality inspection device based on visual inspection according to claim 2 is characterized in that: The rotating clamping component located on the left side is provided with a set of limiting push rods (14) movably connected to the inner wall of the detection part (2), and the limiting push rods (14) are extended and retracted by means of a cylinder.

4. The new energy vehicle threshold beam quality inspection device based on visual inspection according to claim 3 is characterized in that: A marking cylinder (15) is provided on the left side of the inner cavity of the detection part (2), and a seal is fixedly installed above the marking cylinder (15).

5. The new energy vehicle threshold beam quality inspection device based on visual inspection according to claim 4 is characterized in that: The conveyor line (1) is configured as a belt conveyor, and is provided with a profiling jig adapted to the threshold beam (3), and the profiling jig is made of a polymer material to prevent the surface of the threshold beam (3) from being scratched during transportation.

6. The new energy vehicle threshold beam quality inspection device based on visual inspection according to claim 5 is characterized in that: The conveyor line (1), the detection unit (2), the lifting cylinder (11), the rotating clamping component, and the limit push rod (14) realize the PLC signal interaction function by using sensors with different functions, and monitor the transport status of the threshold beam (3) on the conveyor line (1) in real time.

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