Visual inspection device for appearance defects

Abstract

The utility model relates to the technical field of automobile part detection, and discloses a visual inspection device for appearance defects, which comprises a support frame, an operation platform, a visual image analyzer and a visual inspection mechanism, the top of the supporting frame is fixedly connected with an operation platform. A conveying chain belt is fixedly arranged on the upper surface of the operation platform, automobile parts are placed on the surface of the conveying chain belt, motors are connected to the two ends of the conveying chain belt, and a visual detection mechanism is fixedly connected to the side face of the conveying chain belt and arranged above the conveying chain belt. The anti-skid lines are arranged on the surface of the conveying chain belt, so that the friction force between the conveying chain belt and a workpiece is increased, and automobile parts are effectively prevented from slipping or shifting in the conveying process; the position of a workpiece is monitored in real time by cooperating with an automobile part position sensor, the shooting action of the visual detection head is accurately triggered, the consistency of image acquisition positions is ensured, and the reliability of a detection result is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts inspection, and in particular to a visual inspection device for appearance defects. Background Technology

[0002] In industrial production, appearance defect detection is a crucial step in ensuring product quality, especially for products with high requirements for appearance precision, such as automotive parts, electronic components, and plastic products. Traditional manual inspection suffers from low efficiency, high subjectivity, and a high rate of missed detections, making it difficult to meet the demands of modern large-scale production. Currently, machine vision-based inspection devices are gradually becoming mainstream. They use cameras to capture images and combine this with algorithmic analysis to identify defects, significantly improving inspection efficiency and accuracy.

[0003] However, current mainstream visual inspection devices still have the following limitations:

[0004] Insufficient adaptability to inspection: The inspection mechanism of existing devices is usually a fixed installation structure, which makes it difficult to adjust the inspection angle and distance for workpieces of different sizes and shapes. This results in low inspection coverage for complex curved surfaces or irregularly shaped workpieces, and it is easy to miss hidden defects.

[0005] Transmission stability defects: During workpiece transmission, traditional conveyor belts lack anti-slip or buffer designs, which may cause image acquisition position shifts due to speed fluctuations or workpiece slippage, affecting detection accuracy; at the same time, the transmission speed is fixed and cannot match the rhythm requirements of different detection processes.

[0006] Based on this, we propose a visual inspection device for appearance defects. Utility Model Content

[0007] To address the technical problems of insufficient adaptability and transmission stability in detection, this utility model provides a visual inspection device for appearance defects.

[0008] This utility model is achieved by the following technical solution: a visual inspection device for appearance defects, including a support frame, an operating platform, a visual image analyzer, and a visual inspection mechanism;

[0009] An operating platform is fixedly connected to the top of the support frame; a transmission chain is fixedly installed on the upper surface of the operating platform, automotive parts are placed on the surface of the transmission chain, motors are connected to both ends of the transmission chain, and a vision inspection mechanism is fixedly connected to the side of the transmission chain and installed above the transmission chain.

[0010] The visual inspection mechanism includes a support leg, which is fixedly connected to the upper surface of the operating platform. A mounting bracket is fixedly connected to the top of the support leg. A fixed platform is fixedly connected to the upper surface of the mounting bracket. One end of a connecting column is fixedly connected to the outside of the fixed platform, and the other end of the connecting column is connected to the connecting platform.

[0011] A vision inspection head is fixedly mounted on the surface of the connecting platform. A sliding frame is fixedly mounted on the outside of the mounting bracket. The surface of the sliding frame has a sliding groove. An adjustment frame is slidably connected above the sliding frame. A slider is integrally extended and fixed on the adjustment frame, and the slider is engaged in the sliding groove.

[0012] When a car part arrives at the inspection area, the car part position sensor triggers the vision inspection head to capture an image of the workpiece surface. The vision inspection head transmits the acquired image to a vision image analyzer, whose built-in image recognition algorithm processes the image and automatically identifies defect types such as scratches, dents, and color differences. The algorithm compares the image with a standard image database to determine whether the defect exceeds a threshold and generates an inspection report containing the defect's location, type, and severity.

[0013] As a further optimization of this utility model, the visual inspection mechanism is electrically connected to the visual image analyzer, and the visual image analyzer is fixedly installed above the operating platform.

[0014] As a further optimization of this invention, a motor drives a transmission belt to move the automotive component to be inspected along the surface of the operating platform towards the vision inspection mechanism. The motor's speed can be adjusted according to inspection requirements to achieve speed control of the transmission belt.

[0015] As a further optimization of this utility model, the surface of the conveyor belt is provided with anti-slip texture. The anti-slip texture on the surface of the conveyor belt increases the friction with the workpiece and prevents slippage during the transmission process, which would cause positional deviation.

[0016] As a further optimization of this utility model, the automotive component position sensor is electrically connected to the visual image analyzer to trigger the imaging action of the visual inspection head. The automotive component position sensor monitors the workpiece position in real time. When the workpiece moves to the preset detection area, the automotive component position sensor sends a trigger signal to the visual image analyzer to start the imaging program of the visual inspection head.

[0017] As a further optimization of this utility model, the connecting column is a telescopic rod, which can adjust the distance between the vision inspection head and the automotive part to be inspected. By stretching or retracting the connecting column, the distance between the vision inspection head and the workpiece surface can be adjusted to meet the inspection needs of workpieces of different heights.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model increases the friction between the conveyor belt and the workpiece by setting anti-slip textures on the surface of the conveyor belt, effectively preventing the automotive parts from slipping or shifting in position during the transmission process; in conjunction with the automotive part position sensor to monitor the position of the workpiece in real time, it accurately triggers the shooting action of the vision inspection head, ensuring the consistency of the image acquisition position and improving the reliability of the inspection results.

[0020] 2. In this utility model, the telescopic connecting column in the vision inspection mechanism can flexibly adjust the distance between the vision inspection head and the workpiece surface to adapt to inspection needs at different heights.

[0021] 3. This utility model uses a built-in image recognition algorithm in a visual image analyzer to automatically process the images collected by the detection head, quickly identify various defect types such as scratches, dents, and color differences, and generate an inspection report containing the location, type, and severity of defects by comparing with a standard image database. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This utility model Figure 1 Schematic diagram of the connection structure of the visual inspection mechanism;

[0024] Figure 3 This utility model Figure 2 Schematic diagram of the cross-section of the middle section.

[0025] Explanation of key symbols:

[0026] 1. Support frame; 2. Operating platform; 3. Vision image analyzer; 4. Vision inspection mechanism; 41. Support leg; 42. Conveyor belt; 43. Motor; 44. Automotive component position sensor; 45. Mounting bracket; 46. Connecting platform; 47. Connecting column; 48. Connecting platform; 49. Vision inspection head; 410. Sliding frame; 411. Sliding groove; 412. Adjusting frame; 5. Automotive component. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] Example 1:

[0029] Please combine Figures 1-3 This embodiment proposes a visual inspection device for appearance defects, including a support frame 1, an operating platform 2, a visual image analyzer 3, and a visual inspection mechanism 4;

[0030] The top of the support frame 1 is fixedly connected to the operating platform 2; the upper surface of the operating platform 2 is fixedly provided with a transmission chain 42, the surface of the transmission chain 42 is placed with automotive parts 5, the two ends of the transmission chain 42 are connected to motors 43, and the side of the transmission chain 42 is fixedly connected to a vision inspection mechanism 4 which is set above the transmission chain 42.

[0031] Specifically, in this technical solution, motor 43 drives the transmission belt 42 to move the vehicle component 5 to be inspected along the surface of the operating platform 2 towards the vision inspection mechanism 4. The motor 43 can adjust its speed according to the inspection requirements, thus controlling the speed of the transmission belt 42.

[0032] The surface of the conveyor belt 42 is provided with anti-slip texture. The anti-slip texture on the surface of the conveyor belt 42 increases the friction with the workpiece and prevents slippage during the transmission process, which would cause positional deviation.

[0033] The visual inspection mechanism 4 is electrically connected to the visual image analyzer 3, which is fixedly installed above the operating platform 2.

[0034] The automotive component position sensor 44 is electrically connected to the vision image analyzer 3 and is used to trigger the imaging action of the vision inspection head 49. The automotive component position sensor 44 monitors the position of the workpiece in real time. When the workpiece moves to the preset detection area, the automotive component position sensor 44 sends a trigger signal to the vision image analyzer 3 to start the imaging program of the vision inspection head 49.

[0035] The visual inspection mechanism 4 includes a support leg 41, which is fixedly connected to the upper surface of the operating platform 2. A mounting frame 45 is fixedly connected to the top of the support leg 41. A fixed platform 46 is fixedly connected to the upper surface of the mounting frame 45. One end of a connecting column 47 is fixedly connected to the outside of the fixed platform 46, and the other end of the connecting column 47 is connected to the connecting platform 48.

[0036] It should be noted that the connecting column 47 is a telescopic rod, which can adjust the distance between the vision inspection head 49 and the automotive part 5 to be inspected. By stretching or retracting the connecting column 47, the distance between the vision inspection head 49 and the workpiece surface can be adjusted to meet the inspection needs of workpieces of different heights.

[0037] A vision inspection head 49 is fixedly installed on the surface of the connecting platform 48. A sliding frame 410 is fixedly installed on the outer side of the mounting bracket 45. A sliding groove 411 is opened on the surface of the sliding frame 410. An adjusting frame 412 is slidably connected above the sliding frame 410. A slider is integrally extended and fixed on the adjusting frame 412, and the slider is engaged in the sliding groove 411.

[0038] Specifically, when the automotive component 5 arrives at the inspection area, the automotive component position sensor 44 triggers the vision inspection head 49 to capture an image of the workpiece surface. The vision inspection head 49 transmits the acquired image to the vision image analyzer 3, whose built-in image recognition algorithm processes the image and automatically identifies defect types such as scratches, dents, and color differences. The algorithm compares the image with a standard image database to determine whether the defect exceeds a threshold and generates an inspection report containing the defect location, type, and severity.

[0039] The following is an explanation of the working principle of this patent:

[0040] I. Principle of Workpiece Transfer and Positioning

[0041] Transmission power drive

[0042] Motor 43 drives the conveyor belt 42 to move, causing the automotive part 5 to be inspected to move along the surface of the operating platform 2 toward the vision inspection mechanism 4. The speed of motor 43 can be adjusted according to the inspection requirements to achieve speed control of the conveyor belt 42.

[0043] Anti-slip and positioning

[0044] The anti-slip texture on the surface of the conveyor belt 42 increases the friction with the workpiece, preventing slippage and positional shift during transport. The automotive component position sensor 44 monitors the workpiece position in real time. When the workpiece moves to the preset detection area, the automotive component position sensor 44 sends a trigger signal to the vision image analyzer 3 to start the imaging program of the vision inspection head 49.

[0045] II. Adjustment Principle of Visual Inspection Mechanism

[0046] Distance and angle adjustment

[0047] By stretching or contracting the connecting column 47, the distance between the vision inspection head 49 and the workpiece surface can be adjusted to meet the inspection needs of workpieces of different heights.

[0048] Image acquisition trigger

[0049] When the automotive component 5 arrives at the inspection area, the automotive component position sensor 44 triggers the vision inspection head 49 to capture an image of the workpiece surface. The vision inspection head 49 transmits the acquired image to the vision image analyzer 3, whose built-in image recognition algorithm processes the image and automatically identifies defect types such as scratches, dents, and color differences. The algorithm compares the image with a standard image database to determine whether the defect exceeds a threshold and generates an inspection report containing the defect location, type, and severity.

[0050] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A visual inspection device for appearance defects, characterized in that, It includes a support frame (1), an operating platform (2), a visual image analyzer (3), and a visual inspection mechanism (4); The support frame (1) is fixedly connected to the top of the operating platform (2); the upper surface of the operating platform (2) is fixedly provided with a transmission chain (42), the surface of the transmission chain (42) is provided with an automobile part (5), the two ends of the transmission chain (42) are connected with motors (43), and the side of the transmission chain (42) is fixedly connected to a vision inspection mechanism (4) provided above the transmission chain (42); The visual inspection mechanism (4) is electrically connected to the visual image analyzer (3), which is fixedly installed above the operating platform (2); The visual inspection mechanism (4) includes a support leg (41), which is fixedly connected to the upper surface of the operating platform (2). A mounting bracket (45) is fixedly connected to the top of the support leg (41). A fixed platform (46) is fixedly connected to the upper surface of the mounting bracket (45). One end of a connecting column (47) is fixedly connected to the outside of the fixed platform (46). The other end of the connecting column (47) is connected to a connecting platform (48). A visual inspection head (49) is fixedly installed on the surface of the connecting platform (48).

2. The visual inspection device for appearance defects as described in claim 1, characterized in that, The surface of the transmission chain (42) is provided with anti-slip texture to prevent the automotive parts (5) to be tested from slipping during transmission.

3. The visual inspection device for appearance defects as described in claim 1, characterized in that, The vehicle component position sensor (44) is electrically connected to the visual image analyzer (3) and is used to trigger the shooting action of the visual inspection head (49).

4. The visual inspection device for appearance defects as described in claim 1, characterized in that, The connecting column (47) is a telescopic rod that can adjust the distance between the visual inspection head (49) and the vehicle part (5) to be inspected.

5. The visual inspection device for appearance defects as described in claim 1, characterized in that, A sliding frame (410) is fixedly installed on the outside of the mounting bracket (45). A sliding groove (411) is provided on the surface of the sliding frame (410). An adjusting frame (412) is slidably connected above the sliding frame (410). A slider is integrally extended and fixed on the adjusting frame (412), and the slider is engaged in the sliding groove (411).

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