Automobile paint film defect detection device based on machine vision

Abstract

The utility model discloses an automobile paint film defect detection device based on machine vision, which belongs to the technical field of automobile detection and comprises a fixed support, a detection component is arranged in the fixed support, a light source receiving component is arranged on one side of the detection component, the fixed support is arranged on a fixed seat, and the light source receiving component is arranged on the other side of the detection component. And a moving assembly is arranged on the top surface of the fixed seat. According to the automobile paint film defect detection device based on machine vision, the detection precision can be effectively improved, the reliability is higher, and the detection speed can be effectively improved to meet the requirement of assembly line detection.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile detection, in particular to an automobile paint film defect detection device based on machine vision. Background Art

[0002] In recent years, with the rapid development of electronics and computer technology, machine vision software and hardware have also advanced rapidly, providing an optimal solution for online detection of paint film defects. Using machines to replace the human eye for paint film defect detection has become a key trend in modern industrial development. In terms of technical skills and specifications, using machine vision for surface defect detection offers numerous advantages. First, machine vision is a non-contact, non-destructive method for detection, making it safe and reliable. Second, compared to camera-based analysis of the human eye, machine vision can replace and even surpass the human eye, achieving even more powerful and efficient detection capabilities.

[0003] Cars are widely used in our daily lives and have become our preferred mode of transportation. During the production process, the quality of the paint job directly reflects the appearance of the car. However, impurities are inevitably present during the painting process, which can lead to cosmetic defects such as bumps and concave spots on the finished paint surface. Furthermore, during the assembly of painted parts, scratches on the paint surface are inevitable, resulting in cosmetic defects such as scratches and paint peeling on the assembled vehicle. These cosmetic defects inevitably lead to sales and production disputes during car sales. To avoid these disputes, it is essential to inspect the entire vehicle's paint surface before it leaves the factory.

[0004] Currently, automotive paint inspection primarily relies on visual inspection, which is highly subjective and highly influenced by the proficiency of the inspector. Furthermore, because paint surfaces are highly reflective and significantly affected by lighting angles, visual inspection inevitably results in many missed inspections. Furthermore, long-term inspections can cause eye fatigue, which can also lead to missed appearance defects. Due to the slow speed, high missed inspection rate, and poor reliability of visual inspection, it is not feasible to implement integrated inspection throughout the entire production process. Utility Model Content

[0005] The purpose of this utility model is to provide a vehicle paint film defect detection device based on machine vision, which can not only effectively improve the detection accuracy and higher reliability, but also effectively increase the detection speed to meet the needs of assembly line detection.

[0006] To achieve the above-mentioned purpose, the utility model provides a car paint film defect detection device based on machine vision, including a fixed bracket, a detection component is provided inside the fixed bracket, a light source receiving component is provided on one side of the detection component, the fixed bracket is arranged on a fixed seat, and a movable component is provided on the top surface of the fixed seat.

[0007] Preferably, the detection component includes a first detection light source and a second detection light source, and the first detection light source and the second detection light source are both fixed to the inner walls on both sides and the inner side of the top of the fixing bracket.

[0008] Preferably, the first detection light source is a fluorescent lamp, and the second detection light source is a downlight, and the downlight is arranged on the right side of the fluorescent lamp.

[0009] Preferably, the fluorescent lamp is rectangular in shape, and a plurality of fluorescent lamps are installed in two rows in the fixing bracket, with each fluorescent lamp being fitted to each other;

[0010] The outer side of the downlight is circular, and a plurality of downlights are evenly arranged inside the fixing bracket.

[0011] Preferably, the light source receiving component is a high-definition camera, and the high-definition camera is fixedly arranged inside the fixing bracket.

[0012] Preferably, the number of the high-definition cameras on the inner top and both inner walls of the fixing bracket is 2-3.

[0013] Preferably, the moving assembly includes a guide rail, a transmission chain is provided inside the guide rail, a fixing rod is transversely provided on the transmission chain, and transmission motors are provided at both ends of the transmission chain.

[0014] Preferably, the guide rail is parallel to the top surface of the fixing seat.

[0015] Preferably, the fixing rods are evenly arranged on the transmission chain, and the distance between adjacent fixing rods is slightly larger than the diameter of the automobile tire.

[0016] Preferably, a control panel is provided on the outside of the fixing bracket, a display screen is provided above the control panel, and a transparent protective shell is provided on the outside of the display screen.

[0017] Therefore, the present invention utilizes the aforementioned machine vision-based automotive paint film defect detection device. By illuminating the car's paint with fluorescent lamps and downlights, the reflected light enters a high-definition camera, which can clearly and accurately detect paint film defects. This effectively improves detection accuracy and reliability. Furthermore, by driving a moving assembly beneath the car, the car can be moved at a constant speed, facilitating inspection of the entire paint surface. This effectively increases detection speed to meet the requirements of assembly line inspection.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a structural schematic diagram of an embodiment of a vehicle paint film defect detection device based on machine vision in the utility model;

[0020] Figure 2 This is a structural schematic diagram of an embodiment of a machine vision-based automobile paint film defect detection device of the present utility model from another perspective;

[0021] Figure 3 The utility model is a side view of an embodiment of a device for detecting automobile paint film defects based on machine vision.

[0022] Reference numerals

[0023] 1. Fixed bracket; 2. Fixed seat; 3. Control panel; 4. HD camera; 5. Fixed rod; 6. Drive chain; 7. Drive motor; 8. Fluorescent lamp; 9. Downlight; 10. Display screen; 11. Guide rail. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model is further described below through the accompanying drawings and embodiments.

[0025] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0026] Example 1

[0027] like Figure 1-3 As shown, the present invention provides a machine vision-based automotive paint film defect detection device, comprising a fixed bracket 1, within which is disposed a detection assembly comprising a first detection light source and a second detection light source. Both the first detection light source and the second detection light source are fixed to the inner walls at both ends and the inner side of the top of the fixed bracket 1. The first detection light source is a fluorescent lamp 8, and the second detection light source is a downlight 9, which is located to the right of the fluorescent lamp 8. The left side of the fixed bracket 1 is the first detection light source area, and the right side of the first detection light source area is the second detection light source area.

[0028] Fluorescent lamp 8 is rectangular in shape and consists of multiple fluorescent tubes arranged side by side. Several fluorescent lamps 8 are installed in two rows within bracket 1, with each lamp 8 aligned closely to ensure sufficient light source. The smoothness of the paint surface is determined by the light reflected from the fluorescent lamp 8. If the paint surface area near the fluorescent lamp 8 is brighter, it indicates a convex defect; if the area farther from the fluorescent lamp 8 is brighter, it indicates a concave or jagged defect.

[0029] The outer side of the downlight 9 is circular, and a plurality of downlights 9 are evenly arranged inside the fixing bracket 1. The downlight 9 is used to check whether the paint surface has swirl lines or glare lines.

[0030] A light receiving assembly is provided on one side of the detection assembly. This assembly detects defects in the vehicle's paint film by receiving light reflected from the detection assembly. This assembly comprises a high-definition camera 4, which is fixedly mounted within the fixed bracket 1. Two to three cameras 4 are located on the top and inner walls of the fixed bracket 1. Multiple cameras 4 capture reflected light from the entire vehicle's paint surface, effectively improving detection accuracy.

[0031] The fixing bracket 1 is set on the fixing seat 2. The top surface of the fixing seat 2 is provided with a moving component. The moving component includes a guide rail 11. The guide rail 11 is parallel to the top surface of the fixing seat 2, which can facilitate the car tire to enter the guide rail 11.

[0032] A transmission chain 6 is installed inside the guide rail 11, with transmission motors 7 installed at both ends of the transmission chain 6. The transmission motor 7 enables the transmission chain 6 to rotate repeatedly. Fixed rods 5 are installed horizontally on the transmission chain 6. The fixed rods 5 are evenly arranged on the transmission chain 6, and the distance between adjacent fixed rods 5 is slightly larger than the diameter of the vehicle tire.

[0033] When a car enters the guide rail 11, the two adjacent fixing rods 5 secure the car's tires. The car is then put into neutral, and the drive chain 6 rotates, driving the car forward at a constant speed. Once the car enters the inspection area, the paint film is inspected using the inspection assembly and the light source receiving assembly. The drive motor 7 continues to operate, and as other uninspected cars enter the guide rail 11, all-around inspection of the paint film on those uninspected cars is performed. This effectively increases inspection speed to meet the requirements of production line inspection.

[0034] A control panel 3 is provided on the outside of the fixed bracket 1. A display screen 10 is provided above the control panel 3. A transparent protective cover is provided on the outside of the display screen 10 to protect the display screen 10 without obstructing the operator's viewing. The control panel 3 can control the on and off of the detection light source in the detection assembly and also control the operation and stopping of the transmission motor 7.

[0035] The images detected by the high-definition camera 4 can be transmitted to the computer inside the control panel 3. The internal software recognizes the reflected light in the image and then displays the defective positions of the car paint film on the display screen, making it convenient for the staff to mark and record.

[0036] Therefore, the present invention adopts the above-mentioned automobile paint film defect detection device based on machine vision, which can not only effectively improve the detection accuracy and higher reliability, but also effectively increase the detection speed to meet the needs of assembly line detection.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A machine vision-based automobile paint film defect detection device, characterized in that: It comprises a fixed bracket, a detection component is arranged inside the fixed bracket, a light source receiving component is arranged on one side of the detection component, the fixed bracket is arranged on a fixed seat, and a moving component is arranged on the top surface of the fixed seat; the detection component comprises a first detection light source and a second detection light source, and the first detection light source and the second detection light source are both fixed on the inner walls on both sides and the inner side of the top of the fixed bracket; the first detection light source is a fluorescent lamp, and the second detection light source is a downlight, and the downlight is arranged on the right side of the fluorescent lamp; the fluorescent lamp is in the shape of a rectangle, and a plurality of fluorescent lamps are installed in two rows in the fixed bracket, and each fluorescent lamp fits each other; the outer side of the downlight is circular, and a plurality of downlights are evenly arranged inside the fixed bracket; the light source receiving component is a high-definition camera, and the high-definition camera is fixedly arranged inside the fixed bracket; the number of the high-definition cameras on the inner top and the inner walls on both sides of the fixed bracket is 2-3; a control panel is arranged on the outer side of the fixed bracket, a display screen is arranged above the control panel, and a transparent protective shell is arranged on the outer side of the display screen.

2. The device for detecting automobile paint film defects based on machine vision according to claim 1, characterized in that: The moving assembly comprises a guide rail, a transmission chain is arranged inside the guide rail, a fixing rod is arranged transversely on the transmission chain, and transmission motors are arranged at both ends of the transmission chain.

3. The machine vision-based automobile paint film defect detection device according to claim 2, characterized in that: The guide rail is parallel to the top surface of the fixing seat.

4. The device for detecting automobile paint film defects based on machine vision according to claim 2, characterized in that: The fixing rods are evenly arranged on the transmission chain, and the distance between adjacent fixing rods is slightly larger than the diameter of the automobile tire.

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