A photovoltaic panel el defect detection auxiliary lighting device

Abstract

The utility model relates to photovoltaic detection technical field, and specifically is a kind of photovoltaic panel EL defect detection auxiliary lighting device, including support platform, the inner side of support platform is slidably connected with placing rack, the both sides of placing rack are rotatably connected with guide wheel, further include: lighting assembly, lighting assembly fixed mounting is at the top of support platform, the output end of the device is driven motor and drives screw rod to rotate in the inner side of guide frame, screw rod rotates and will drive adjusting seat along guide frame horizontal movement, wherein, the soft light shield of the both sides of sliding seat is wavy and stretches or shrinks naturally with the movement of sliding seat, always keep the inside of light shield and outside environment light insulation, reduce the interference of outside light to EL detection, and by setting electric push rod drive rotary table to occur deflection, drive EL camera and infrared light source synchronous adjustment angle, ensure that infrared light source provides stable near-infrared auxiliary light for EL detection, improve the contrast of defect area and normal area.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic detection technology, specifically to an auxiliary lighting device for detecting photovoltaic panel EL defects. Background Technology

[0002] In the process of large-scale development of the photovoltaic industry, EL defect detection of photovoltaic panels is a key link to ensure their power generation performance and service life. EL detection technology applies a reverse bias voltage to the photovoltaic panel to excite near-infrared light, and then an EL camera captures the emitted image to identify internal defects that are invisible to the naked eye, such as hidden cracks, poor solder joints, and broken grids. The light-sealing of the detection environment directly determines the accuracy of defect identification.

[0003] In existing technologies, during the EL defect detection process of photovoltaic panels, insufficient shading often allows ambient light from factory lighting, outdoor natural light, and other external sources to easily penetrate the detection area. This stray light masks the weak near-infrared EL signal emitted by the photovoltaic panel, significantly reducing the contrast between the defective and normal areas. This not only makes it difficult to identify defects such as microcracks and minor grid breaks, but also causes noise interference in the images captured by the EL camera, thereby affecting the accuracy of defect judgment and increasing the risk of misjudgment or missed detection. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an auxiliary lighting device for photovoltaic panel EL defect detection, which solves the problem that ambient light can interfere with the photovoltaic panel EL detection process.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary lighting device for photovoltaic panel EL defect detection, comprising a support platform, a placement frame slidably connected to the inner side of the support platform, guide wheels rotatably connected to both sides of the placement frame, and an lighting assembly fixedly mounted on the top of the support platform; the lighting assembly includes a light shield, a guide frame fixedly connected to the outer side of the light shield, a drive motor fixedly connected to the outer side of the guide frame, a threaded rod rotatably connected to the output end of the drive motor, an adjusting seat threadedly connected to the outer wall of the threaded rod, a sliding seat fixedly connected to the outer side of the adjusting seat, a rotating platform rotatably connected to the inner side of the sliding seat, an EL camera and an infrared light source mounted on the inner side of the rotating platform, the EL camera and infrared light source being arranged alternately, flexible light shields fixedly connected to both sides of the sliding seat, the output end of the drive motor driving the threaded rod to rotate inside the guide frame, the rotation of the threaded rod causing the adjusting seat to move horizontally along the guide frame, the flexible light shields ensuring that the interior of the light shield is always isolated from external ambient light, reducing interference from external light on EL detection.

[0006] Preferably, the inner side of the support platform is rolledly connected to the outer side of the guide wheel via a guide rail, the bottom of the light shield is fixedly connected to the top of the support platform, and the guide wheels on both sides of the placement rack roll in cooperation with the guide rail to reduce sliding friction.

[0007] Preferably, the outer wall of the adjusting seat is slidably connected to the inner wall of the guide frame, and the inner wall of the sliding seat is slidably connected to the inner wall of the light shield. The adjusting seat can drive the sliding seat to move synchronously. During the movement of the sliding seat, the EL camera and infrared light source on the rotating table can move together and cooperate to complete the detection of the photovoltaic panel.

[0008] Preferably, the side of the flexible light-shielding plate away from the sliding seat is fixedly connected to the inner wall of the light-shielding cover, and the outer wall of the rotating platform is fixedly connected to a limit block. The flexible light-shielding plate can naturally stretch or contract as the sliding seat moves, and the pleated part of the wave-shaped structure can be flexibly unfolded (when stretched) or folded (when contracted).

[0009] Preferably, an electric push rod is fixedly connected to the top of the sliding seat, and an adjusting block is fixedly connected to the outside of the electric push rod. The bottom of the adjusting block is slidably connected to the top of the sliding seat, and the electric push rod can push the adjusting block to slide along the top of the sliding seat.

[0010] Preferably, the limiting block is slidably connected to the outer side of the adjusting block via a sliding groove, and the sliding groove is formed in the wall of the limiting block. When the adjusting block slides, it will drive the limiting block to rotate through the sliding groove, thereby driving the rotating table to rotate inside the sliding seat.

[0011] The beneficial effects of this utility model are as follows:

[0012] (i) The device is equipped with an illumination component. The output end of the drive motor drives the threaded rod to rotate inside the guide frame. When the threaded rod rotates, it will drive the adjusting seat to move horizontally along the guide frame. The soft light shields on both sides of the sliding seat are wavy and naturally stretch or contract with the movement of the sliding seat, always keeping the inside of the light shield isolated from the external ambient light, reducing the interference of external light on EL detection.

[0013] (II) This device incorporates an electric push rod. When the electric push rod pushes the adjusting block to slide along the top of the sliding seat, the adjusting block drives the limiting block to rotate via the sliding groove, thereby causing the rotating table to deflect inside the sliding seat. During the deflection of the rotating table, the EL cameras and infrared light sources arranged in a staggered pattern on its inner side adjust their angles synchronously, ensuring that the shooting angle of the EL camera and the illumination direction of the infrared light source are precisely aligned with the area to be inspected on the photovoltaic panel. This ensures that the infrared light source provides stable near-infrared auxiliary light for EL inspection, improving the contrast between defective and normal areas. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the lighting component of this utility model;

[0017] Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A.

[0018] In the diagram: 1. Support platform; 2. Placement rack; 3. Guide wheel; 4. Lighting assembly; 41. Light shield; 42. Guide frame; 43. Drive motor; 44. Threaded rod; 45. Adjustment seat; 46. Sliding seat; 47. Rotary table; 48. EL camera; 49. Infrared light source; 410. Limit block; 411. Electric push rod; 412. Adjustment block; 413. Flexible light shield; 414. Slide groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Please refer to Figure 1-4 This utility model provides a technical solution: an auxiliary lighting device for detecting photovoltaic panel (EL) defects, including a support platform 1, a placement frame 2 slidably connected to the inner side of the support platform 1, and guide wheels 3 rotatably connected to both sides of the placement frame 2, and also includes: a lighting component 4, which is fixedly installed on the top of the support platform 1; the inner side of the support platform 1 is slidably connected to the outer side of the guide wheels 3 via guide rails, and the bottom of the light shield 41 is fixedly connected to the top of the support platform 1. The placement frame 2 is slid out from the support platform 1, and then the photovoltaic panel to be tested is placed on the placement frame 2. The placement frame 2 is pushed to slide inward along the guide rails on the inner side of the support platform 1. The guide wheels 3 on both sides of the placement frame 2 roll with the guide rails to reduce sliding friction, so that the placement frame 2 drives the photovoltaic panel to move smoothly to the detection area below the light shield 41, completing the initial positioning of the photovoltaic panel.

[0021] The lighting assembly 4 includes a light shield 41. A guide frame 42 is fixedly connected to the outer side of the light shield 41. A drive motor 43 is fixedly connected to the outer side of the guide frame 42. A threaded rod 44 is rotatably connected to the output end of the drive motor 43. An adjusting seat 45 is threadedly connected to the outer wall of the threaded rod 44. A sliding seat 46 is fixedly connected to the outer side of the adjusting seat 45. A rotating table 47 is rotatably connected to the inner side of the sliding seat 46. An EL camera 48 and an infrared light source 49 are mounted on the inner side of the rotating table 47. The EL camera 48 and the infrared light source 49 are arranged alternately. The infrared light source 49 is a narrow-band near-infrared LED light source, which highly overlaps with the core wavelength band of EL detection (800-1100nm) and avoids visible light interference, enhancing the contrast between the defective and normal areas of the photovoltaic panel. Subsequently, the EL camera 48 is activated to capture the EL emission image of the photovoltaic panel under near-infrared light environment. Through image analysis, defects such as hidden cracks, poor soldering, and broken grids inside the photovoltaic panel are identified. Flexible light shields 413 are fixedly connected to both sides of the sliding seat 46. The adjusting seat 45... The outer wall of the sliding seat 46 is slidably connected to the inner wall of the guide frame 42, the inner wall of the sliding seat 46 is slidably connected to the inner wall of the light shield 41, the side of the flexible light shield 413 away from the sliding seat 46 is fixedly connected to the inner wall of the light shield 41, and the outer wall of the rotating table 47 is fixedly connected to the limit block 410. The drive motor 43 is started, and the output end of the drive motor 43 drives the threaded rod 44 to rotate inside the guide frame 42. When the threaded rod 44 rotates, it will drive the adjusting seat 45 to move horizontally along the guide frame 42, and then drive the sliding seat 46 to move synchronously through the adjusting seat 45. During the movement of the sliding seat 46, the EL camera 48 and the infrared light source 49 on the rotating table 47 can move together and cooperate to complete the detection of the photovoltaic panel. Among them, the wavy flexible light shield 413 on both sides of the sliding seat 46 naturally stretches or contracts with the movement of the sliding seat 46: the folded part of the wavy structure can be flexibly unfolded (when stretched) or folded (when contracted), always keeping the inside of the light shield 41 isolated from the external ambient light and reducing the interference of external light on the EL detection.

[0022] An electric push rod 411 is fixedly connected to the top of the sliding seat 46. An adjusting block 412 is fixedly connected to the outside of the electric push rod 411. The bottom of the adjusting block 412 is slidably connected to the top of the sliding seat 46. A limiting block 410 is slidably connected to the outside of the adjusting block 412 through a sliding groove 414, which is formed in the wall of the limiting block 410. When the electric push rod 411 pushes the adjusting block 412 to slide along the top of the sliding seat 46, the adjusting block 412 will drive the limiting block 410 to rotate through the sliding groove 414, thereby driving the rotating stage 47 to rotate inside the sliding seat 46. During the rotation of the rotating stage 47, the EL camera 48 and infrared light source 49 arranged alternately on its inner side adjust their angles synchronously, so that the shooting angle of the EL camera 48 and the illumination direction of the infrared light source 49 are precisely aligned with the area to be inspected on the photovoltaic panel, ensuring that the infrared light source 49 provides stable near-infrared auxiliary light for EL inspection and improves the contrast between the defective area and the normal area.

[0023] Working principle: Before the test begins, the placement rack 2 is slid out from the support platform 1. Then, the photovoltaic panel to be tested is placed on the placement rack 2. The placement rack 2 is pushed to slide inward along the guide rail on the inner side of the support platform 1. The guide wheels 3 on both sides of the placement rack 2 roll in cooperation with the guide rail to reduce sliding friction, so that the placement rack 2 can move the photovoltaic panel smoothly to the test area under the light shield 41, thus completing the initial positioning of the photovoltaic panel.

[0024] Then, the drive motor 43 on the outside of the lighting component 4 is started. The output end of the drive motor 43 drives the threaded rod 44 to rotate inside the guide frame 42. When the threaded rod 44 rotates, it will drive the adjusting seat 45 to move horizontally along the guide frame 42. Then, the adjusting seat 45 drives the sliding seat 46 to move synchronously. During the movement of the sliding seat 46, the EL camera 48 and the infrared light source 49 on the rotating table 47 can move together and cooperate to complete the detection of the photovoltaic panel. Among them, the wavy soft light shield 413 on both sides of the sliding seat 46 naturally stretches or contracts with the movement of the sliding seat 46. The folded part of the wavy structure can be flexibly unfolded (when stretched) or folded (when contracted), always keeping the inside of the light shield 41 isolated from the external ambient light and reducing the interference of external light on the EL detection.

[0025] Among them, the infrared light source 49 is a narrow-band near-infrared LED light source, which highly overlaps with the core wavelength band of EL detection, 800-1100nm, and avoids visible light interference, thereby enhancing the contrast between the luminescence of defective areas and normal areas of the photovoltaic panel. Subsequently, the EL camera 48 is activated to capture the EL luminescence image of the photovoltaic panel under near-infrared light environment. Through image analysis, defects such as hidden cracks, poor solder joints, and broken grids inside the photovoltaic panel are identified.

[0026] When the electric push rod 411 pushes the adjusting block 412 to slide along the top of the sliding seat 46, the adjusting block 412 will drive the limiting block 410 to deflect through the slide groove 414, thereby driving the rotating stage 47 to rotate inside the sliding seat 46. During the rotation of the rotating stage 47, the EL camera 48 and infrared light source 49 arranged in a staggered manner on its inner side adjust their angles synchronously, so that the shooting angle of the EL camera 48 and the illumination direction of the infrared light source 49 are precisely aligned with the area to be inspected on the photovoltaic panel, ensuring that the infrared light source 49 provides stable near-infrared auxiliary light for EL inspection and improves the contrast between defective areas and normal areas.

[0027] After the test is completed, the drive motor 43 and electric push rod 411 are started in reverse to reset the sliding seat 46 and the rotating table 47. The wave-shaped soft light-shielding plate 413 retracts with the sliding seat 46 to restore its initial shape. Then, the placement frame 2 is pulled out along the guide rail of the support table 1, and the photovoltaic panel that has been tested can be taken out.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary lighting device for detecting photovoltaic panel EL defects, comprising a support platform (1), wherein a placement frame (2) is slidably connected to the inner side of the support platform (1), and guide wheels (3) are rotatably connected to both sides of the placement frame (2), characterized in that, Also includes: Lighting assembly (4), which is fixedly mounted on the top of support platform (1); The lighting assembly (4) includes a light shield (41), a guide frame (42) is fixedly connected to the outside of the light shield (41), a drive motor (43) is fixedly connected to the outside of the guide frame (42), a threaded rod (44) is rotatably connected to the output end of the drive motor (43), an adjustment seat (45) is threadedly connected to the outer wall of the threaded rod (44), a sliding seat (46) is fixedly connected to the outside of the adjustment seat (45), a rotating table (47) is rotatably connected to the inside of the sliding table (46), an EL camera (48) and an infrared light source (49) are installed on the inside of the rotating table (47), and the EL camera (48) and the infrared light source (49) are arranged alternately, and a soft light shield (413) is fixedly connected to both sides of the sliding seat (46).

2. The auxiliary lighting device for photovoltaic panel EL defect detection according to claim 1, characterized in that: The inner side of the support platform (1) is connected to the outer side of the guide wheel (3) by a guide rail, and the bottom of the light shield (41) is fixedly connected to the top of the support platform (1).

3. The auxiliary lighting device for photovoltaic panel EL defect detection according to claim 1, characterized in that: The outer wall of the adjusting seat (45) is slidably connected to the inner wall of the guide frame (42), and the inner wall of the sliding seat (46) is slidably connected to the inner wall of the light shield (41).

4. The auxiliary lighting device for photovoltaic panel EL defect detection according to claim 1, characterized in that: The side of the flexible light-shielding plate (413) away from the sliding seat (46) is fixedly connected to the inner wall of the light-shielding cover (41), and the outer wall of the rotating platform (47) is fixedly connected to the limit block (410).

5. The auxiliary lighting device for photovoltaic panel EL defect detection according to claim 4, characterized in that: An electric push rod (411) is fixedly connected to the top of the sliding seat (46), and an adjusting block (412) is fixedly connected to the outside of the electric push rod (411). The bottom of the adjusting block (412) is slidably connected to the top of the sliding seat (46).

6. The auxiliary lighting device for photovoltaic panel EL defect detection according to claim 4, characterized in that: The limiting block (410) is slidably connected to the outside of the adjusting block (412) through a sliding groove (414), and the sliding groove (414) is formed in the wall of the limiting block (410).

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