A photovoltaic module laminated welding busbar welding effect detection system

Abstract

The utility model discloses a photovoltaic module laminated welding busbar welding effect detection system, include: detection support, linear scanning camera, back light source and central computer, detection support includes two support columns and the horizontal connection between two support columns two cross bars, two cross bars are respectively upper cross bar and lower cross bar, upper cross bar is located the production line conveyer belt just above, lower cross bar is located the production line conveyer belt just below, linear scanning camera has 3 in all, parallel installation on upper cross bar, back light source is installed on lower cross bar provides the back light field of view for linear scanning camera, linear scanning camera with central computer communication connection can transmit the image scanned to central computer in time. Through above -mentioned mode, the utility model can be accurate and timely on -line and find the defect problem, and will not because fatigue influence the efficiency and accuracy of work.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module testing equipment, and in particular to a photovoltaic module stacked welding busbar welding effect testing system. Background Technology

[0002] In the photovoltaic module stacking process, the series welding of cell strings through busbars is a crucial step in ensuring the electrical performance of the module. The welding quality in this step (such as cold solder joints, over-soldering, misalignment, and solder ball spatter) directly determines the module's output power and long-term reliability. Currently, there are two main traditional methods for inspecting the welding quality of busbars in photovoltaic modules: one is manual visual inspection, but this relies entirely on the experience of on-site workers, which is not only inefficient but also leads to a significant increase in the rate of missed inspections as workers become more fatigued. Furthermore, it cannot provide quantitative evaluation, hindering continuous improvement. The other method is offline EL testing, which is usually performed after lamination. By the time problems are discovered, it is often too late, resulting in extremely high rework costs, and it cannot be used for real-time process monitoring. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a photovoltaic module stacked welding busbar welding effect detection system, which can replace manual visual inspection and EL inspection, improve detection efficiency and provide rapid real-time feedback on defective parts.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution: a photovoltaic module stacked welding busbar welding effect detection system, comprising: a detection bracket, a linear scanning camera, a backlight source, and a central computer; the detection bracket includes two support columns and two horizontal bars connected between the two support columns, the two support columns being symmetrically arranged on both sides of the photovoltaic module production line conveyor belt, and the two horizontal bars being an upper horizontal bar and a lower horizontal bar, the upper and lower horizontal bars being perpendicular to the movement direction of the production line conveyor belt, and the upper horizontal bar being located on the production line conveyor belt. Directly above, the lower crossbar is located directly below the production line conveyor belt. There are three linear scanning cameras, which are installed in parallel on the upper crossbar. The scanning line of each linear scanning camera is perpendicular to the length direction of a busbar on the photovoltaic module placed on the production line conveyor belt. The backlight source is installed on the lower crossbar to provide backlight field of view for the linear scanning cameras. The linear scanning cameras are communicatively connected to the central computer and can transmit the scanned images to the central computer in real time. The image processing program with deep learning function set in the central computer judges the quality of the solder joints on the busbar.

[0005] In a preferred embodiment of this utility model, the backlight source is a linear LED light source. There are three linear LED light sources, one of which is located directly below each linear scanning camera. The light spot of each linear LED light source falling on the conveyor belt of the production line just covers the field of view of the corresponding linear scanning camera.

[0006] In a preferred embodiment of this utility model, the linear LED light source is a white light source.

[0007] In a preferred embodiment of this utility model, the distance between the upper crossbar and the lower crossbar is 30~50cm.

[0008] In a preferred embodiment of this utility model, both the upper and lower crossbars are made of aluminum alloy profiles with four-sided grooves.

[0009] In a preferred embodiment of this invention, the linear scanning camera is synchronized with the production line encoder.

[0010] The beneficial effects of this utility model are as follows: This utility model introduces machine vision into the welding quality inspection of busbars. By using a linear scanning camera to continuously scan the busbars on the photovoltaic modules on the production line, the scanned images are transmitted to a computer. The computer's pre-set deep learning program, trained on big data, processes the images to automatically identify welding defects on the busbars. The use of this product can effectively improve the online detection capability of welding defects. This method does not rely on human intervention, can accurately and promptly detect defects online, and will not affect work efficiency and accuracy due to fatigue, thus avoiding the defects of manual visual inspection and EL inspection. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention; The components in the attached diagram are labeled as follows: 1. Linear scanning camera, 2. Backlight source, 3. Upper crossbar, 4. Lower crossbar, 5. Support column. Detailed Implementation

[0012] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0013] Please see Figure 1 The embodiments of this utility model include: A photovoltaic module stacked welding busbar welding effect detection system is disclosed. The system includes: a detection bracket, a linear scanning camera 1, a backlight source 2, and a central computer. The detection bracket includes two support columns 5 and two horizontal bars connected between the two support columns 6. The two support columns 5 are symmetrically arranged on both sides of the photovoltaic module production line conveyor belt. The two horizontal bars are an upper horizontal bar 3 and a lower horizontal bar 4, which are perpendicular to the movement direction of the production line conveyor belt. The upper horizontal bar 3 is located directly above the production line conveyor belt, and the lower horizontal bar 4 is located below the... Directly below the conveyor belt of the production line, there are three linear scanning cameras 1, which are installed in parallel on the upper crossbar 3. The scanning line of each linear scanning camera 1 is perpendicular to the length direction of a busbar on the photovoltaic module placed on the production line conveyor belt. The backlight source 2 is installed on the lower crossbar 4 to provide backlight field of view for the linear scanning camera 1. The linear scanning camera 1 is communicatively connected to the central computer and can transmit the scanned image to the central computer in real time. The image processing program with deep learning function set in the central computer judges the quality of the solder joints on the busbar.

[0014] The backlight source 2 is a linear LED light source. There are three linear LED light sources, one directly below each linear scanning camera. The light spot from each linear LED light source falling on the production line conveyor belt exactly covers the field of view of the corresponding linear scanning camera 1. The linear LED light sources are white light sources. By setting the light spot covering the field of view of each linear scanning camera 1 with linear LED light sources, the clarity of the photos taken by the linear scanning camera 1 can be effectively improved, facilitating quality judgment by the image processing program in the computer. Moreover, the high contrast of the white light source is more conducive to the image processing program's judgment of welding details.

[0015] The distance between the upper crossbar 3 and the lower crossbar 4 is 30-50cm. In practice, it is generally 35cm, with the distance between the upper crossbar 3 and the upper surface of the production line conveyor belt being approximately 20cm, and the distance between the lower crossbar 4 and the lower surface of the production line conveyor belt being approximately 12cm. This arrangement facilitates the passage of the production line conveyor belt between the upper crossbar 3 and the lower crossbar 4, and allows the focus of the linear scanning camera 1 to be concentrated within the light spot formed by the linear LED light source.

[0016] Both the upper crossbar 3 and the lower crossbar 4 are made of aluminum alloy profiles with four-sided grooves. Because aluminum alloy has a four-sided groove structure, when placing photovoltaic modules of different specifications on the production line conveyor belt, it is convenient to move the linear scanning camera and linear LED light source parallel to the grooves on the aluminum alloy profile according to the position of the busbar on the photovoltaic modules of different specifications, and then fix them in place.

[0017] Each linear scanning camera 1 is synchronized with the production line encoder, so that the linear scanning camera 1 can operate synchronously with the production line and transmit the scanned images to the computer in a timely manner.

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A system for detecting the welding effect of busbars in photovoltaic module stacking, characterized in that, The photovoltaic module stacked welding busbar welding effect detection system includes: a detection bracket, a linear scanning camera, a backlight source, and a central computer; The testing bracket includes two support columns and two horizontal crossbars connected between the two support columns. The two support columns are symmetrically arranged on both sides of the photovoltaic module production line conveyor belt. The two horizontal crossbars are an upper crossbar and a lower crossbar, which are perpendicular to the movement direction of the production line conveyor belt. The upper crossbar is located directly above the production line conveyor belt, and the lower crossbar is located directly below the production line conveyor belt. There are three linear scanning cameras, which are installed in parallel on the upper crossbar. The scanning line of each linear scanning camera is perpendicular to the length direction of a busbar on the photovoltaic module placed on the production line conveyor belt. The backlight source is installed on the lower crossbar to provide a backlight field of view for the linear scanning cameras. The linear scanning cameras are communicatively connected to the central computer and can transmit the scanned images to the central computer in real time. The image processing program with deep learning function set in the central computer judges the quality of the solder joints on the busbar.

2. The photovoltaic module stacked welding busbar welding effect detection system according to claim 1, characterized in that, The backlight source is a linear LED light source. There are three linear LED light sources in total, one of which is located directly below each linear scanning camera. The light spot of each linear LED light source falling on the conveyor belt of the production line just covers the field of view of the corresponding linear scanning camera.

3. The photovoltaic module stacked welding busbar welding effect detection system according to claim 1, characterized in that, The linear LED light source is a white light source.

4. The photovoltaic module stacked welding busbar welding effect detection system according to claim 1, characterized in that, The distance between the upper and lower crossbars is 30-50cm.

5. The photovoltaic module stacked welding busbar welding effect detection system according to claim 1, characterized in that, Both the upper and lower crossbars are made of aluminum alloy profiles with four-sided grooves.

6. The photovoltaic module stacked welding busbar welding effect detection system according to claim 1, characterized in that, The linear scanning camera is synchronized with the production line encoder.

Images