Detection system suitable for product solder skips

Abstract

The invention relates to a detection system suitable for missing welding of a product, and belongs to the technical field of automobile parts, an image acquisition module, a contrast analysis module, a lamp control module and a detection probe are in communication connection with a central control module, and the image acquisition module is used for acquiring an image on the surface of an automobile part and sending the image to the central control module; the central control module sends an instruction to the contrast analysis module, the contrast analysis module carries out contrast analysis on the obtained surface image of the automobile part to obtain contrast abnormal data, it is judged that illumination is uneven, and the central control module sends an instruction to the lamp control module according to the contrast abnormal data. And the lamp control module adjusts the light brightness at the position with abnormal contrast data, so that illumination on the surface of the automobile part is uniform, and the problem that the accuracy of a detection result is affected due to uneven illumination when hidden parts such as a welding seam intersection, a corner and a corner are detected is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts, and in particular relates to a detection system suitable for product welding leaks. Background Art

[0002] As the foundation of the automobile industry, auto parts are necessary factors to support the sustainable and healthy development of the automobile industry. In particular, the current independent development and innovation that the automobile industry is vigorously carrying out in full swing requires a strong parts system to support it. The independent brand and technological innovation of the whole vehicle need parts as the basis, and the independent innovation of parts has a strong driving force on the development of the whole vehicle industry. They influence and interact with each other.

[0003] At present, when conducting surface defect inspection on automobile parts, welding leaks are a common manufacturing defect. The welding leaks defects of automobile parts are mostly detected through intelligent detection systems, which can detect a large number of parts in a short time, greatly improving the detection efficiency and reducing the false detection rate.

[0004] However, the current intelligent detection system has some problems when performing leak detection on automobile parts: because leaks are prone to occur in hidden parts such as weld intersections, corners and edges of automobile parts, the current intelligent detection system is prone to uneven lighting due to the hidden locations, and uneven lighting leads to shadows, which may be confused with the leak area and affect the accuracy of the detection results. In this regard, a detection system suitable for product leaks is proposed. Summary of the invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a detection system suitable for product leaky welds, which solves the problem in the prior art that when detecting hidden parts such as weld intersections, corners and edges, uneven lighting is prone to occur due to the hidden locations, and uneven lighting leads to shadows, which may be confused with the leaky weld area, affecting the accuracy of the detection results.

[0006] The object of the present invention can be achieved by the following technical scheme: a detection system suitable for product welding leaks, comprising a central control module, an image acquisition module, a contrast analysis module, a light control module for illuminating the surface of automobile parts and a detection module for identifying welding leaks on the surface of automobile parts, wherein the image acquisition module, the contrast analysis module, the light control module and the detection module are respectively connected to the central control module for communication, the image acquisition module is used to obtain images on the surface of automobile parts and send them to the central control module, the central control module sends instructions to the contrast analysis module, the contrast analysis module performs contrast analysis on the obtained surface image of automobile parts to obtain contrast abnormality data, and determines that the illumination is uneven, the central control module sends instructions to the light control module according to the contrast abnormality data, and the light control module adjusts the light brightness at the place where the contrast data is abnormal to make the illumination on the surface of automobile parts uniform.

[0007] As a further solution of the present invention, the lighting control module includes a lamp holder, a plurality of lamp heads mounted on the lamp holder and a dimmer for adjusting the brightness of the lamp heads. The dimmer is communicatively connected to the central control module. The central control module sends instructions to the dimmer, and the dimmer controls the brightness of some of the lamp heads among the plurality of lamp heads that are facing abnormal contrast data.

[0008] As a further solution of the present invention, the surface of the automobile part is provided with an anti-reflective coating.

[0009] As a further solution of the present invention, the image acquisition module includes a high-speed camera, and the high-speed camera is used to reduce reflections.

[0010] As a further solution of the present invention, the detection probe is a flexible probe, and the flexible probe can be fitted to the surface of the automobile part.

[0011] As a further solution of the present invention, the portion where the flexible probe fits the surface of the automobile component is an arc-shaped structure.

[0012] As a further solution of the present invention, several of the lamp heads are connected to the lamp holder through an angle adjustment assembly, and the angle adjustment assembly includes an arc sleeve rotatably arranged in the lamp holder, the lamp head is clamped in the arc sleeve, the arc sleeve is externally connected to a driving member, and the driving member is communicatively connected to a central control module.

[0013] As a further solution of the present invention, the lamp holder is frictionally fitted with the inner wall of the arc sleeve, and the inner wall of the arc sleeve is provided with a silicone pad for increasing friction.

[0014] As a further solution of the present invention, a protrusion is provided on the outer wall of the arc-shaped sleeve, and a plurality of slots are provided on the lamp holder, and the protrusion is engaged with any one of the slots to limit the position.

[0015] As a further solution of the present invention, the end of the protrusion is a semicircular structure, and the slot is a semicircular slot, and the semicircular structure matches the semicircular slot.

[0016] The beneficial effects of the present invention are:

[0017] The image acquisition module, contrast analysis module, light control module and detection probe are respectively communicated with the central control module. The image acquisition module is used to obtain images on the surface of automobile parts and send them to the central control module. The central control module sends instructions to the contrast analysis module. The contrast analysis module performs contrast analysis on the obtained surface images of automobile parts to obtain contrast abnormality data and determines that the lighting is uneven. The central control module sends instructions to the light control module according to the contrast abnormality data. The light control module adjusts the light brightness at the location where the contrast data is abnormal to make the lighting on the surface of the automobile parts uniform. Then the central control module controls the detection probe to detect the automobile parts to determine the specific location of the product's welding leak. Finally, corresponding processing is performed on it after the detection is completed, which solves the problem that when detecting hidden parts such as weld intersections, corners and edges, uneven lighting is prone to occur due to the hidden location, and uneven lighting leads to shadows. This shadow may be confused with the welding leak area, affecting the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of a product welding leak detection system of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the detector of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the lighting control module of the present invention.

[0022] Description of main component symbols:

[0023] In the figure: 1. detector; 2. lighting control module; 21. lamp holder; 22. lamp head; 3. detection probe; 4. arc sleeve; 5. protrusion. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] See also Figure 1-3The present embodiment provides a detection system for product leak welding, including a central control module, an image acquisition module, a contrast analysis module, a light control module 2 for illuminating the surface of automobile parts, and a detection module for identifying leak welding on the surface of automobile parts. The detection system also includes a detector 1, and the detection module is a detection probe 3. The detection probe 3 is arranged on the detector 1. The detector 1 is connected to the central control module for communication. Figure 1 and Figure 2 As shown, the image acquisition module, the contrast analysis module, the light control module 2 and the detection probe 3 are respectively connected to the central control module for communication. The image acquisition module is used to acquire the image on the surface of the automobile parts and send it to the central control module. The central control module sends an instruction to the contrast analysis module. The contrast analysis module performs contrast analysis on the acquired surface image of the automobile parts to acquire contrast abnormality data and determines that the illumination is uneven. The central control module sends an instruction to the light control module 2 according to the contrast abnormality data. The light control module 2 adjusts the light brightness at the location where the contrast data is abnormal to make the illumination on the surface of the automobile parts uniform. The contrast analysis module detects whether there is a difference in contrast on the entire image acquired by the image acquisition module, and detects whether there is a difference in contrast. Areas with abnormally high or low contrast are abnormal. The shadows produced by the abnormality in this area may be confused with the leaking weld area. Therefore, the abnormal area is judged as an area of ​​uneven lighting. In addition, the lighting control module 2 adjusts the light brightness at the abnormal contrast data location. The purpose is that the uneven lighting areas that appear in hidden areas such as weld intersections, corners and edges are generally small local areas, and the area illuminated by the light is generally larger than the abnormal area. If the brightness of all lights is adjusted directly, it is easy to cause the non-abnormal area to be too bright, which will also affect the distinction of the leaking weld area. Therefore, the lighting control module 2 here needs to adjust the light brightness at the abnormal contrast data location to solve the problem that needs to be solved.

[0026] At present, automobile parts, as the foundation of the automobile industry, are necessary factors to support the sustainable and healthy development of the automobile industry. When conducting surface defect inspections on automobile parts, weld leaks are a common manufacturing defect. Weld leaks in automobile parts are mostly detected through intelligent detection systems, which can detect a large number of parts in a short time, greatly improve detection efficiency and reduce false detection rates. However, the current intelligent detection systems have some problems when conducting weld leak inspections on automobile parts. For example, weld leaks are prone to occur in hidden locations such as weld intersections, corners and edges of automobile parts. However, when the current intelligent detection systems detect hidden locations such as weld intersections, corners and edges, uneven lighting is prone to occur due to the hidden locations. Uneven lighting leads to shadows, which may be confused with weld leak areas, affecting the accuracy of the detection results.

[0027] In order to solve the above problems, in this embodiment, the image acquisition module, the contrast analysis module, the light control module 2 and the detection probe 3 are respectively communicated with the central control module, the image acquisition module is used to obtain the image on the surface of the automobile parts and send it to the central control module, the central control module sends an instruction to the contrast analysis module, the contrast analysis module performs contrast analysis on the acquired surface image of the automobile parts to obtain contrast abnormality data, and determines that the lighting is uneven. The central control module sends an instruction to the light control module 2 according to the contrast abnormality data, and the light control module 2 adjusts the light brightness at the location where the contrast data is abnormal to make the lighting on the surface of the automobile parts uniform, and then the central control module controls the detection probe 3 to detect the automobile parts, so as to determine the specific location of the product's welding leakage, and finally makes corresponding processing after the detection is completed, thereby solving the problem that when detecting hidden parts such as weld intersections, corners and edges, uneven lighting is prone to occur due to the hidden location, and the shadows caused by uneven lighting may be confused with the welding leakage area, affecting the accuracy of the detection result.

[0028] In addition, in order to better ensure that the lighting control module 2 only adjusts the light brightness at the location where the contrast data is abnormal, so as to provide fill light and avoid the shadows caused by uneven lighting from being confused with the defective welding area, in one embodiment, the lighting control module 2 includes a lamp holder 21, a plurality of lamp heads 22 installed on the lamp holder 21, and a dimmer for adjusting the brightness of the lamp heads 22. The dimmer is communicated with the central control module, and the central control module sends instructions to the dimmer. The dimmer controls the brightness of some of the lamp heads 22 that are facing the abnormal contrast data. All of the lamp heads 22 are connected to a dimmer, and all the dimmers are individually communicated with the central control module, ensuring that all the dimmers will not affect each other. This can avoid the situation where the brightness of the light is too high in the non-abnormal area when adjusting the light brightness, which will also affect the distinction of the defective welding area.

[0029] In addition to the shadows caused by uneven lighting, the shadows may be confused with the weld leak area. In addition, since the automobile parts are smooth, there will be a certain amount of reflection. The reflection will affect the lighting control module 2 of the weld leak detection system and interfere with the accuracy of the weld leak detection. In order to deal with this problem, in one embodiment, the surface of the automobile parts is provided with an anti-reflective coating. With this anti-reflective coating, the reflection problem can be avoided as much as possible, thereby improving the accuracy of the weld leak detection. In addition, when encountering parts such as headlights, rearview mirrors and side mirrors, these parts are more reflective than ordinary parts, and the image acquisition module also needs to obtain the image on the surface of the automobile parts and send it to the central control module. When the image acquisition module faces parts such as headlights, rearview mirrors and side mirrors, it is also easy to produce reflections. In order to avoid the reflection affecting the shooting quality, the image acquisition module includes a high-speed camera, which is used to reduce reflections.

[0030] Since the detection targets are hidden locations such as weld intersections, corners and edges of automotive parts where weld leaks are prone to occur, the problem encountered when detecting these hidden locations is solved. In addition to the uneven lighting, the uneven structure at this location is solved. In order to ensure that these hidden locations can also be well detected, in one embodiment, the detection probe 3 is a flexible probe. In order to enable the detection probe 3 to detect weld leaks in automotive parts at a close range and to prevent the flexible probe from causing damage to the automotive parts, the detection probe 3 is a flexible probe. The flexible probe can be fitted with the surface of the automotive part, and the fitting point between the flexible probe and the surface of the automotive part is an arc structure. Through the arc structure of the flexible probe, the flexible probe can also be well and comprehensively detected for weld leaks when facing hidden locations such as weld intersections, corners and edges.

[0031] It is worth mentioning that, when inspecting automobile parts for leaking welding, the common positions of automobile parts are easy to inspect and there is rarely uneven illumination. However, when inspecting hidden parts such as weld intersections, corners and edges of automobile parts, after determining that the area is unevenly illuminated, the brightness of some of the lamp heads 22 is adjusted. Although it can solve the shadow caused by uneven illumination and avoid the possibility that the shadow may be confused with the leaking welding area, the reflection problem may occur during operation due to excessive brightness adjustment. In order to solve this problem, in one embodiment, the plurality of lamp heads 22 are adjusted by angle adjustment. The component is connected to the lamp holder 21, and the angle adjustment component includes an arc sleeve 4 rotatably set in the lamp holder 21, and the lamp head 22 is clamped in the arc sleeve 4. The arc sleeve 4 is externally connected to a driving member, and the driving member is communicated with the central control module. Since the uneven lighting at hidden parts such as the intersection of welds, corners and edges of automobile parts is caused by the obstruction of these hidden parts, the light cannot be evenly irradiated. Therefore, by adjusting the angle of the lamp head 22, the lamp head 22 can be facing the hidden parts such as the intersection of welds, corners and edges of automobile parts, thereby solving the problem of reflection caused by adjusting the brightness too brightly during operation.

[0032] Since automobile parts are to be inspected for weld leaks, the inspection system needs to be used multiple times, and the lamp holder 22 is adjusted at multiple angles. For this adjustment of the lamp holder 22, most of them use rotatable components such as motors to directly drive the lamp holder 22 to rotate. However, there will be an inertia effect. This inertia effect is prone to cause the position of the lamp holder 22 to change due to repeated use. Once the position changes, it will cause a large error to the weld leak detection system. In order to solve this problem, in one embodiment, the lamp holder 22 is frictionally fitted with the inner wall of the arc sleeve 4, and the inner wall of the arc sleeve 4 is provided with a silicone pad for increasing friction. The silicone pad is used to prevent the arc sleeve 4 from squeezing the lamp holder 22, and can also avoid relative movement between the lamp holder 22 and the arc sleeve 4, ensuring The arc sleeve 4 is integrated with the lamp holder 22 and moves synchronously. A protrusion 5 is provided on the outer wall of the arc sleeve 4, and a plurality of grooves are provided on the lamp holder 21. The protrusion 5 is engaged with any one of the grooves to limit the position. The cooperation between the protrusion 5 and the groove can solve the problem that the position of the lamp holder 22 may change due to inertia each time the lamp is used multiple times. In addition, the end of the protrusion 5 is a semicircular structure, and the groove is a semicircular groove. The semicircular structure cooperates with the semicircular groove. The depth of the semicircular groove cannot be too large, and the outer edge of the semicircular groove is smooth, which can ensure that the arc sleeve 4 can move. The arc sleeve 4 can be driven by an external motor through a rotating shaft, and the external motor is communicatively connected to the central processing module.

[0033] The working principle and use process of the present invention:

[0034] The image acquisition module, contrast analysis module, light control module 2 and detection probe 3 are respectively connected to the central control module in communication. The image acquisition module is used to obtain images on the surface of automobile parts and send them to the central control module. The central control module sends instructions to the contrast analysis module. The contrast analysis module performs contrast analysis on the obtained surface images of automobile parts to obtain contrast abnormality data and determines that the illumination is uneven. The central control module sends instructions to the light control module 2 according to the contrast abnormality data. The light control module 2 adjusts the light brightness at the location where the contrast data is abnormal to make the illumination on the surface of the automobile parts uniform. Then the central control module controls the detection probe 3 to detect the automobile parts to determine the specific location of the product's welding leakage, and finally makes corresponding processing after the detection is completed; the central processing module controls the external motor to start, and the external motor drives the arc sleeve 4 to adjust the angle until the lamp head 22 can face the hidden parts such as the intersection of the weld seams, corners and edges of the automobile parts, thereby solving the problem of reflection caused by adjusting the brightness too bright during operation.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A detection system suitable for product welding leaks, characterized in that: The invention comprises a central control module, an image acquisition module, a contrast analysis module, a light control module for irradiating the surface of automobile parts and a detection module for identifying welding leaks on the surface of automobile parts. The image acquisition module, the contrast analysis module, the light control module and the detection module are respectively connected to the central control module for communication. The image acquisition module is used to acquire images on the surface of automobile parts and send them to the central control module. The central control module sends instructions to the contrast analysis module. The contrast analysis module performs contrast analysis on the acquired surface images of automobile parts to acquire contrast abnormality data and determines that the illumination is uneven. The central control module sends instructions to the light control module according to the contrast abnormality data. The light control module adjusts the light brightness at the location where the contrast data is abnormal to make the illumination on the surface of automobile parts uniform.

2. A detection system for product welding leaks according to claim 1, characterized in that: The lighting control module includes a lamp holder, a plurality of lamp heads mounted on the lamp holder, and a dimmer for adjusting the brightness of the lamp heads. The dimmer is communicatively connected to a central control module. The central control module sends instructions to the dimmer, and the dimmer controls the brightness of some of the lamp heads among the plurality of lamp heads where contrast data is abnormal to be adjusted.

3. A detection system for product welding leaks according to claim 1, characterized in that: The surface of the automobile part is provided with an anti-reflective coating.

4. A detection system for product welding leaks according to claim 1, characterized in that: The image acquisition module includes a high-speed camera, and the high-speed camera is used to reduce reflections.

5. A detection system for product welding leaks according to claim 1, characterized in that: The detection module is a detection probe, and the detection probe is a flexible probe that can be attached to the surface of the automobile part.

6. A detection system for product welding leaks according to claim 5, characterized in that: The portion where the flexible probe is attached to the surface of the automobile component is an arc-shaped structure.

7. A detection system for product welding leaks according to claim 2, characterized in that: The lamp heads are connected to the lamp holder through an angle adjustment component, the angle adjustment component includes an arc sleeve rotatably arranged in the lamp holder, the lamp heads are clamped in the arc sleeve, the arc sleeve is externally connected to a driving member, and the driving member is communicatively connected to a central control module.

8. A detection system for product welding leaks according to claim 7, characterized in that: The lamp holder is frictionally fitted with the inner wall of the arc sleeve, and the inner wall of the arc sleeve is provided with a silicone pad for increasing friction.

9. A detection system for product welding leaks according to claim 8, characterized in that: A protrusion is arranged on the outer wall of the arc-shaped sleeve, and a plurality of slots are arranged on the lamp holder. The protrusion is engaged with any one of the slots to limit the position.

10. A detection system for product welding leaks according to claim 9, characterized in that: The end of the protrusion is a semicircular structure, and the slot is a semicircular slot, and the semicircular structure matches the semicircular slot.

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