Multifunctional weld defect detection device
Through a multifunctional weld defect detection device integrating vision sensors and light sources, the problem of large land and high cost in traditional detection methods is solved, and the weld perforation and surface morphological defects are synchronized in one station, improving detection efficiency and saving costs.
Patent Information
- Application Number
- CN202421761656.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-24
AI Technical Summary
Traditional weld defect detection requires multiple workstations and robotic arms, which covers a large area, is costly and has a long inspection time, making it difficult to apply to occasions where the site is tight and the funds are limited.
A multifunctional weld defect detection device is designed to integrate vision sensors and light sources, and two cameras and line lasers are used to synchronize perforation and surface morphological defects in one station, so as to achieve efficient detection through different light sources and camera combinations.
Achieve fast and low-cost multi-functional weld defect detection in one station, reducing site and robotic arms occupation, improving detection efficiency, and shortening detection time.
Smart Images
Figure CN223065175U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of weld detection, and particularly relates to a multifunctional weld defect detection device. Background Technique
[0002] Welding is an important processing method in the manufacturing industry. The quality of the weld directly affects the service life of the product. Therefore, in the welding process, the generation of various defects must be strictly controlled, and after welding is completed, the weld needs to be defect-detected.
[0003] Weld defects are mainly divided into surface topography defects (such as concave defects like pores, and convex defects like spatter) and perforation defects (penetrating defects left by welding through the workpiece). At present, traditional defect detection methods use two detection stations to respectively achieve the detection of the surface topography quality of the weld and the detection of penetrating defects. This detection method not only requires multiple reserved stations, occupies a large area, but also needs to add multiple robotic arms, resulting in high costs; moreover, due to the pipeline-type measurement in different stations, it will also lead to a slower detection rhythm and a longer detection time. Therefore, it is difficult to apply to the situation where the site area planning is tight, the project funds are limited, and the station rhythm is limited. Summary of the Invention
[0004] In order to solve the above technical problems, the utility model provides a multifunctional weld defect detection device, which can simultaneously detect perforation defects and surface topography defects in one station, and has the characteristics of less site occupation, fast detection rhythm, and short time consumption.
[0005] The technical solution is as follows:
[0006] A multifunctional weld defect detection device for simultaneously detecting whether there are perforation defects and surface topography defects on a welded workpiece, characterized in that it includes: a vision sensor and a light source with a fixed relative position.
[0007] The vision sensor includes: a housing, a first camera, a second camera and a line laser installed inside the housing; the optical axis of the first camera is substantially parallel to the propagation direction of the laser stripe projected by the line laser (the included angle between the two is less than 10°), and the optical axis of the second camera forms a preset included angle with the propagation direction of the laser stripe projected by the line laser.
[0008] The light projected by the light source can enter the first camera.
[0009] The light source and the first camera form a perforation defect detection system, and the two are respectively arranged on both sides of the workpiece to be measured. The light source is used to project light onto one side surface of the workpiece, and the first camera is used to collect images of the other side surface of the workpiece.
[0010] The second camera and the line laser form a surface topography defect detection system. The line laser is used to project a laser stripe onto the surface of the workpiece to be measured, and the second camera is used to collect the image of the laser stripe projected on the workpiece surface.
[0011] Preferably, it further includes a U-shaped bracket, and both ends of the U-shaped bracket are used to fix the vision sensor and the light source respectively.
[0012] Furthermore, a first window is provided at the front end of the housing of the vision sensor, and the first camera and the line laser are installed at positions corresponding to the first window.
[0013] Above / below the first window, the housing is recessed inward / protruded outward to form an angular cavity. The second camera is installed in the angular cavity, and a second window is provided at the front end of the angular cavity corresponding to the second camera.
[0014] Preferably, the wavelength of the light emitted by the light source is different from that of the line laser, and filter films that only allow the corresponding wavelengths to pass through are respectively provided at the front ends of the first camera and the second camera.
[0015] Furthermore, the included angle between the optical axis of the second camera and the propagation direction of the laser stripe projected by the line laser ranges from 30° to 60°.
[0016] The present utility model provides a multifunctional weld defect detection device. Two cameras and one laser are integrated in the vision sensor of this device, and combined with the light source, it can synchronously and efficiently detect different types of defects in the weld area. Among them, the first camera and the light source cooperate with each other to detect whether there are perforation defects in the two-dimensional image of the weld; the second camera and the laser cooperate with each other to detect whether there are surface topography defects such as depressions and protrusions in the structured light image of the weld.
[0017] This device only needs to be placed in one work station, reducing the occupation of materials such as site and robotic arm, saving costs, and moreover, improving the detection efficiency and shortening the detection time. Description of the Drawings
[0018] Figure 1 It is a schematic plan view of the multifunctional weld detection device in the specific implementation manner;
[0019] Figure 2 It is a schematic three-dimensional structure view of the multifunctional weld detection device in the specific implementation manner. Specific Implementation Manner
[0020] The technical solutions of the present utility model will be described in detail below in combination with the drawings and specific implementation manners.
[0021] A multi-functional weld defect detection device is used to simultaneously detect whether there are perforation defects and surface topography defects on a welded workpiece. It is characterized in that, as Figure 1-2 shown, it includes: a vision sensor 1 and a light source 2 with fixed relative positions;
[0022] The vision sensor 1 includes: a housing, a first camera 11, a second camera 13 and a line laser 12 installed inside the housing; the optical axis of the first camera 11 is substantially parallel to the propagation direction of the laser stripe projected by the line laser 12 (the angle between the two is less than 10°), and the optical axis of the second camera 13 forms a preset angle (30° - 60°) with the propagation direction of the laser stripe projected by the line laser 12;
[0023] The light emitted by the light source 2 can enter the first camera 11;
[0024] The light source 2 and the first camera 11 form a perforation defect detection system, and they are respectively arranged on both sides of the workpiece to be measured. The light source 2 is used to project light onto one side surface of the workpiece, and the first camera 11 is used to collect images of the other side surface of the workpiece;
[0025] The second camera 13 and the line laser 12 form a surface topography defect detection system. The line laser is used to project a laser stripe onto the surface of the workpiece to be measured, and the second camera 13 is used to collect images of the laser stripe projected on the workpiece surface.
[0026] During specific implementation, a U-shaped bracket 3 can be used. The two ends of the U-shaped bracket 3 are used to fix the vision sensor 1 and the light source 2 respectively.
[0027] A first window is provided at the front end of the housing of the vision sensor 1, and the first camera 11 and the line laser 12 are installed at positions corresponding to the first window;
[0028] As Figure 2 shown, above / below the first window, the housing is recessed / protruded inward to form an angular cavity, and the second camera 13 is installed in the angular cavity. The angular cavity is provided with a second window at the front end corresponding to the second camera 13.
[0029] To prevent interference between the light source and the line laser, it is preferably implemented as: the wavelengths of the light emitted by the light source 2 and the line laser 12 are different, and filter films that only allow the corresponding wavelengths to pass are respectively provided at the front ends of the first camera 11 and the second camera 13.
[0030] For example: to avoid interference from other on-site light, the light source is an infrared light source, and an infrared band-pass filter film is provided at the front end of the first camera lens.
[0031] The laser emitted by the line laser is visible light, and a filter film corresponding to the wavelength is provided at the front end of the second camera lens.
[0032] The exemplary working process is as follows:
[0033] Using a mobile device such as a robotic arm, translate the workpiece to be measured or translate the vision sensor 1 and the light source 2 to cause a change in the position between the detection device and the workpiece to be measured;
[0034] Meanwhile, the light source, the first camera, the laser, and the second camera are all turned on and work synchronously.
[0035] Perform gray value analysis on the two-dimensional weld image collected by the first camera to search for areas with large gray differences in the image. If such areas exist, there are perforation defects; otherwise, there are no such defects.
[0036] Use the structured light image of the laser stripe projected on the workpiece surface collected by the second camera to obtain the three-dimensional point information on the laser stripe, and judge whether there are concave or convex defects based on the depth information of the three-dimensional points.
[0037] As the position between the workpiece and the vision sensor 1 changes, the first camera and the second camera collect weld images at different positions of the workpiece, and analyze whether there are perforation defects and surface topography defects at different positions.
[0038] The foregoing description of the specific exemplary embodiments of the present detection system has been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive nor to limit the present detection system to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teachings.
Claims
1. A multifunctional weld defect detection device for simultaneously detecting whether there are perforation defects and surface topography defects on a welded workpiece, characterized in that, Including: A vision sensor (1) and a light source (2) with a fixed relative position; The vision sensor (1) includes: a housing, a first camera (11), a second camera (13) and a line laser (12) installed inside the housing; the optical axis of the first camera (11) is substantially parallel to the propagation direction of the laser stripe projected by the line laser (12), and a preset angle is formed between the optical axis of the second camera (13) and the propagation direction of the laser stripe projected by the line laser (12); The light projected by the light source (2) can enter the first camera (11); The light source (2) and the first camera (11) form a perforation defect detection system, and they are respectively arranged on both sides of the workpiece to be measured. The light source (2) is used to project light onto one surface of the workpiece, and the first camera (11) is used to collect an image of the other surface of the workpiece; The second camera (13) and the line laser (12) form a surface topography defect detection system. The line laser is used to project a laser stripe onto the surface of the workpiece to be measured, and the second camera (13) is used to collect an image of the laser stripe projected on the workpiece surface.
2. The multifunctional weld defect detection device according to claim 1, wherein: It further includes a U-shaped bracket (3), and both ends of the U-shaped bracket (3) are used to fix the vision sensor (1) and the light source (2) respectively.
3. The multifunctional weld defect detection device according to claim 1, characterized in that: A first window is provided at the front end of the housing of the vision sensor (1), and the first camera (11) and the line laser (12) are installed at positions corresponding to the first window; Above / below the first window, the housing is recessed / protruded inward to form an angular cavity, the second camera (13) is installed in the angular cavity, and a second window is provided at the front end of the angular cavity corresponding to the second camera (13).
4. The multifunctional weld defect detection device according to claim 1, characterized in that: The wavelengths of the light emitted by the light source (2) and the line laser (12) are different, and filter films that only allow the corresponding wavelengths to pass through are respectively provided at the front ends of the first camera (11) and the second camera (13).
5. The multifunctional weld defect detection device according to claim 1, wherein: The angle between the optical axis of the second camera (13) and the propagation direction of the laser stripe projected by the line laser (12) ranges from 30° to 60°.