PL detector and use method thereof

Abstract

The invention belongs to the technical field of PL detectors, and particularly relates to a PL detector and a use method thereof. The mounting frame is rotationally connected with a first screw rod; the first screw rod is in threaded connection with a first driving block and a second driving block; a first detection assembly is mounted on the first driving block; a second detection assembly is mounted on the second driving block; the first driving block is connected with the second driving block; a first rack is mounted at the end, away from the first driving block, of the mounting frame. The first detection assembly comprises a first threaded rod and a first sliding rod. The first threaded rod and the first sliding rod are installed on the two sides of the first driving block, and the first threaded rod is rotationally connected to one side of the first driving block. According to the detector, the photovoltaic module can be automatically overturned, double-sided detection of the photovoltaic module is realized, manual overturning is not needed, time is saved, and errors possibly caused by manual operation are avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of PL detectors, in particular to a PL detector and a method for using the same. Background Art

[0002] PL detector is a professional optical instrument. PL detector is usually composed of light source, monochromator, photomultiplier tube, electronic instruments and computer. Its measurement principle is to place the sample on the standard sample table, irradiate light beams of different wavelengths onto the sample through the monochromator, and the photomultiplier tube converts the light signal reflected or transmitted by the sample into an electrical signal, which is then processed and analyzed by electronic instruments and computers to finally obtain the spectral reflectance and transmittance of the sample. Photovoltaic PL tester is a type of PL tester.

[0003] The PL tester uses the principle of photoluminescence to perform non-contact, non-destructive testing of internal defects in photovoltaic modules, revealing microscopic problems such as crystal defects, impurities, cracks, and broken grids inside the modules. PI testing stimulates electrons in silicon wafers to transition to higher energy levels. When these electrons fall back to low energy levels, they release photons, forming a luminescence phenomenon. By analyzing the wavelength, intensity, and distribution of these photons, defects in silicon wafers, such as hidden cracks, impurities, and uneven diffusion, can be detected. This method has the advantages of non-contact, high sensitivity, and high resolution, and can quickly and effectively locate problems in the production process, including single-sided photovoltaic modules and double-sided photovoltaic modules.

[0004] Since both the front and back sides of a bifacial photovoltaic module can generate electricity, it has the advantage of increasing power generation and overall system efficiency. However, the PL detector in the prior art can only detect one side at a time. Therefore, a secondary inspection of the bifacial photovoltaic module is required, which undoubtedly increases the inspection time and cost and reduces the inspection efficiency. During the secondary inspection, additional errors may be introduced due to changes in operation, environment and other factors, affecting the accuracy of the inspection results. Therefore, a PL detector and a method for using the same are proposed to address the above problems. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention provides a PL detector and a method for using the same.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: a PL detector described in the present invention comprises a mounting frame; a first screw is rotatably connected to the mounting frame; a first driving block and a second driving block are threadedly connected to the first screw; a first detection assembly is installed on the first driving block; a second detection assembly is installed on the second driving block; the first driving block is connected to the second driving block; a first rack is installed at one end of the mounting frame away from the first driving block;

[0007] The first detection component includes a first threaded rod and a first sliding rod; the first threaded rod and the first sliding rod are installed on both sides of the first driving block, and the first threaded rod is rotatably connected to one side of the first driving block; the first threaded rod and the first sliding rod are provided with sliding connecting rods, and the two sliding connecting rods are respectively threaded and slidably connected to the first threaded rod and the first sliding rod; the same first detection plate is installed on the top of the two sliding connecting rods; and the first gear is installed at the bottom of the first threaded rod.

[0008] Preferably, the second detection component includes a connecting support frame; a mounting support plate is installed on the top of the connecting support frame; an electric push rod is installed on the mounting support plate; a first sliding block is installed at one end of the electric push rod; a first servo motor is installed on the first sliding block; a rotating shaft is installed on the output shaft of the first servo motor; a second detection plate is installed on the rotating shaft; and vacuum suction grooves are installed on the first detection plate and the first detection plate.

[0009] Preferably, support sliders are installed on both sides of the second driving block; a support slide rod is slidably connected to the support slider; both ends of the two support slide rods are installed on the same mounting frame; a second servo motor is installed at one end of the mounting frame; and the output shaft of the second servo motor is connected to one end of the first screw rod.

[0010] Preferably, a bottom support frame is installed at the bottom of the mounting frame; a fixed support frame is installed on the bottom support frame; an adjustment assembly is installed on the fixed support frame; the adjustment assembly includes a second slide rod and a second threaded rod; the third slide rod and the second threaded rod are installed with a sliding rod; the two sliding rods are respectively threaded and slidably connected to the second threaded rod and the third slide rod; the same connecting support plate is installed on the two sliding rods.

[0011] Preferably, an industrial camera and a laser emitting device are installed on the connecting support plate; and a driving assembly is installed on the fixed support frame.

[0012] Preferably, the driving assembly includes a third servo motor; the third servo motor is mounted on a fixed support frame; a worm is mounted on the output shaft of the third servo motor; both ends of the worm are rotatably connected to the fixed support frame; a worm wheel is meshingly connected to the worm; a connecting shaft is mounted on the worm wheel; and the connecting shaft is connected to the top of the first screw.

[0013] Preferably, the two ends of the first sliding block are slidably connected with second sliding rods, and the ends of the two second sliding rods away from the first sliding block are fixed on the same mounting support plate; and two buffer pads are installed at the bottom of the first detection plate.

[0014] Preferably, four moving wheels are installed at the bottom of the bottom support frame; a mounting plate is installed at one end of the bottom support frame; and three mounting grooves are opened on the mounting plate.

[0015] Preferably, a method for using a PL detector is mainly applicable to the above-mentioned PL detector, and mainly comprises the following steps:

[0016] S1: First, the photovoltaic component is placed on the first inspection board on the first inspection component through an external loading mechanism, and the photovoltaic component is adsorbed and fixed by the vacuum suction groove on the first inspection board;

[0017] S2: Start the second servo motor, which drives the first drive block and the second drive block to move toward the detection device through the first screw, and then detects the first side of the photovoltaic module on the first detection board. The second servo motor drives the photovoltaic module on the first drive block to move through the first screw, and the industrial camera takes pictures. The high-resolution camera and image processing algorithm are used to identify and analyze the printed pattern on the surface of the crystalline silicon cell to determine whether there are defects such as printing offset, broken wire, and virtual printing on the photovoltaic module. The laser emitting device emits laser to the surface of the photovoltaic module, and scans the surface of the crystalline silicon cell with a laser beam. Printing defects are detected by measuring changes in reflected light or transmitted light, and the first side of the photovoltaic module is detected.

[0018] S3: The second servo motor drives the first driving block through the first screw rod, and the first gear on the first detection assembly rotates by meshing with the first rack, thereby driving the first detection plate on the first detection assembly to fit with the second detection plate, so that the second detection plate adsorbs and fixes the photovoltaic assembly, and then the first servo motor drives the second detection plate to flip, so that the other detection surface of the photovoltaic assembly is exposed;

[0019] S4: Then the second servo motor drives the first drive block and the second drive block to reset through the first screw. At the same time, the industrial camera and the laser emitting device detect the other detection surface of the photovoltaic module again. The double-sided detection of the photovoltaic module is completed, and then the external unloading mechanism transfers the photovoltaic module to the next production line to complete the double-sided detection of the double-sided photovoltaic module.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a PL detector, which can automatically flip over a photovoltaic module to achieve double-sided detection of the photovoltaic module without manual flipping, thereby saving time and avoiding errors that may be caused by manual operation.

[0022] The present invention provides a PL detector, the whole detection process of which is highly automated, from the loading of photovoltaic modules to double-sided detection, and then to resetting to prepare for the next detection, all of which are automatically completed through motors and mechanical structures, greatly reducing manual intervention and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 is a stereogram of the present invention;

[0025] Figure 2 is a three-dimensional diagram of the mounting frame of the present invention;

[0026] Figure 3 is a three-dimensional diagram of the connection between the first driving block and the second driving block in the present invention;

[0027] Figure 4 is a stereogram of the second detection assembly of the present invention;

[0028] Figure 5 is a stereogram of the first detection assembly of the present invention;

[0029] Figure 6 is a three-dimensional diagram of a fixed support frame in the present invention;

[0030] Figure 7 is a stereogram of the adjustment assembly of the present invention;

[0031] Figure 8 The present invention Figure 7 Enlarged stereogram of point A in the middle.

[0032] Legend:

[0033] 1. Mounting frame; 2. First screw rod; 3. First driving block; 41. First threaded rod; 42. First slide rod; 43. First gear; 44. Sliding connecting rod; 45. First detection plate; 46. Buffer pad; 5. Second driving block; 61. Connecting support frame; 62. Mounting support plate; 63. Electric push rod; 64. First slide block; 65. Second slide rod; 66. First servo motor; 67. Rotating shaft; 68. Second detection plate; 7. Vacuum suction groove; 8. Support slider; 9, support slide bar; 10, second servo motor; 121, third slide bar; 122, second threaded rod; 123, sliding rod; 124, connecting support plate; 13, industrial camera; 14, laser emitting device; 15, fixed support frame; 16, bottom support frame; 17, first rack; 18, moving wheel; 19, mounting plate; 20, mounting groove; 211, third servo motor; 222, worm; 234, worm wheel; 235, connecting shaft. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Specific examples are given below.

[0036] See also Figure 1-8 The present invention provides a PL detector, comprising a mounting frame 1; a first screw rod 2 is rotatably connected to the mounting frame 1; a first driving block 3 and a second driving block 5 are threadedly connected to the first screw rod 2; a first detection assembly is installed on the first driving block 3; a second detection assembly is installed on the second driving block 5; the first driving block 3 is connected to the second driving block 5; a first rack 17 is installed at one end of the mounting frame 1 away from the first driving block 3;

[0037] The first detection assembly includes a first threaded rod 41 and a first slide rod 42; the first threaded rod 41 and the first slide rod 42 are installed on both sides of the first driving block 3, and the first screw rod 2 is rotatably connected to one side of the first driving block 3; the first threaded rod 41 and the first slide rod 42 are provided with a sliding link 44, and the two sliding links 44 are respectively threadedly connected and slidably connected to the first threaded rod 41 and the first slide rod 42; the top of the two sliding links 44 is installed with the same first detection plate 45; the bottom of the first threaded rod 41 is installed with a first gear 43;

[0038] During operation, the photovoltaic component is first placed on the first detection plate 45 on the first detection component through an external loading mechanism, and the vacuum suction groove 7 on the first detection plate 45 adsorbs and fixes the photovoltaic component. Then, the second servo motor 10 drives the first screw 2 to rotate, so that the first screw 2 drives the first drive block 3 and the second drive block 5 connected thereto to move toward the detection mechanism. The first detection plate 45 moves along with the movement of the first drive block 3, so that the photovoltaic component on the first detection plate 45 passes through the detection area and is photographed by the industrial camera 13. The laser emitting device 14 emits laser to the surface of the photovoltaic component, and scans the surface of the crystalline silicon cell with the laser beam. When inspecting the first side of the photovoltaic module, the inspection is completed, and the second servo motor 10 continues to drive the first driving block 3 and the first detection plate 45 connected thereto to move forward through the first screw rod 2. While moving, the first gear 43 on one side of the first driving block 3 is connected to the first rack 17 for meshing, and then the first gear 43 rotates on the first rack 17, thereby driving the first threaded rod 41 connected to the first gear 43 to rotate, and then the second threaded rod 122 drives the sliding link 44 threadedly connected thereto to move upward, and at the same time, another sliding link 44 rises synchronously with the second sliding rod 65, and the two sliding links 44 drive the first detection plate 45 to move upward, and at the same time, the second detection plate 45 is rotated by the first gear 43 on the first rack 17. The electric push rod 63 on the component pushes the second detection plate 68 to move forward, so that the first detection plate 45 and the second detection plate 68 are fitted together, the vacuum suction groove 7 on the first detection plate 45 is loosened, and the vacuum suction on the second detection plate 68 is sucked and fixed again, and then the first servo motor 66 drives the second detection plate 68 to flip, exposing the other side of the photovoltaic component, and then the second servo motor 10 drives the first drive block 3 and the second drive block 5 and the second detection plate 68 through the first screw 2 to reset. When the second detection plate 68 passes through the detection area, the industrial camera 13 and the laser emitting device 14 detect the other detection surface of the photovoltaic component again, and reset at the same time When the photovoltaic module is turned on its left, the first gear 43 rotates on the first rack 17 to drive the first detection plate 45 to reset, so as to facilitate the re-detection of the photovoltaic module. The first drive block 3 and the second drive block 5 are reset, and then the double-sided detection of the photovoltaic module is completed, thereby improving the detection efficiency. The detector can automatically flip the photovoltaic module to realize the double-sided detection of the photovoltaic module without manual flipping, which saves time and avoids the errors caused by manual operation. The whole detection process is highly automated, from the loading of photovoltaic modules to the double-sided detection, and then to the resetting to prepare for the next detection, which is automatically completed by the motor and mechanical structure, which greatly reduces the manual intervention and improves the work efficiency.

[0039] like Figure 1-5As shown, the second detection assembly includes a connecting support frame 61; a mounting support plate 62 is installed on the top of the connecting support frame 61; an electric push rod 63 is installed on the mounting support plate 62; a first sliding block 64 is installed on one end of the electric push rod 63; a first servo motor 66 is installed on the first sliding block 64; a rotating shaft 67 is installed on the output shaft of the first servo motor 66; a second detection plate 68 is installed on the rotating shaft 67; the first detection plate 45 and the first detection plate 45 are installed with vacuum suction grooves 7;

[0040] During operation, after the inspection of the first surface of the photovoltaic component is completed, the sliding connecting rod 44 drives the first inspection plate 45 to move upward. At the same time, the electric push rod 63 pushes the first sliding block 64 to slide forward, so that the second inspection plate 68 is aligned with the first inspection plate 45. After the alignment is completed, the first inspection plate 45 is raised to fit the second inspection plate 68, and the first inspection plate 45 vacuum releases the photovoltaic component, and then the vacuum suction groove 7 of the second inspection plate 68 is adsorbed and fixed. After the fixation is completed, the first servo motor 66 drives the rotating shaft 67 to rotate, and then the rotating shaft 67 drives the second inspection plate 68 to flip, so that the second inspection surface of the photovoltaic component is exposed, and then the second servo motor 10 drives the first drive block 3 and the second drive block 5 and the second inspection plate 68 to reset through the first screw 2. At the same time of resetting, when the second inspection plate 68 passes through the inspection area domain, the industrial camera 13 and the laser emitting device 14 detect the other detection surface of the photovoltaic component again, and the first drive block 3 and the second drive block 5 are reset when the detection is completed. The photovoltaic component is then taken out by the external unloading mechanism, and the first servo motor 66 resets the first detection plate 45. The electric push rod 63 is extended and retracted through the first sliding block 64 to drive the first detection plate 45 to be extended and retracted, so that the first detection plate 45 is extended and retracted to the installation support frame, reducing the impact of the first detection plate 45 on the placement and detection of the first side of the photovoltaic component; through the automated flipping and resetting mechanism, both sides of the photovoltaic component can be quickly inspected, reducing manual intervention and waiting time, and through the cooperation of the electric push rod 63 and the sliding block, the first detection plate 45 can be extended and retracted to the installation support frame when not in use, thereby saving space in the detection area.

[0041] like Figure 1 , 3As shown, support sliders 8 are installed on both sides of the second driving block 5; support slide bars 9 are slidably connected to the support sliders 8; both ends of the two support slide bars 9 are installed on the same mounting frame 1; a second servo motor 10 is installed at one end of the mounting frame 1; the output shaft of the second servo motor 10 is connected to one end of the first screw 2; when working, the second servo motor 10 drives the first screw 2 to rotate, so that the first screw 2 drives the first driving block 3 and the second driving block 5 and its first detection plate 45 threadedly connected thereto to move toward the detection area, and at the same time, the second driving block 5 moves while the support sliders 8 on both sides slide on the support slide bars 9 as the second driving block 5 moves, providing additional support for the first driving block 3 and the second driving block 5, reducing the shaking or vibration caused by the movement, and enhancing the stability of the entire moving system. The cooperation of the support slider 8 and the support slide bar 9 also plays a role in positioning and guiding, which ensures that the first driving block 3 and the second driving block 5 can only move along a predetermined straight path, thereby reducing any unnecessary offset or tilt.

[0042] like Figure 6-8As shown, a driving assembly is installed on the fixed support frame 15; the driving assembly includes a third servo motor 211; the third servo motor 211 is installed on the fixed support frame 15; a worm 222 is installed on the output shaft of the third servo motor 211; both ends of the worm 222 are rotatably connected to the fixed support frame 15; a worm wheel 234 is meshingly connected to the worm 222; a connecting shaft 235 is installed on the worm wheel 234; the connecting shaft 235 is connected to the top of the first screw 2; the installation The bottom of the mounting frame 1 is provided with a bottom support frame 16; a fixed support frame 15 is provided on the bottom support frame 16; an adjustment assembly is provided on the fixed support frame 15; the adjustment assembly includes a second slide bar 65 and a second threaded rod 122; a slide bar 123 is provided on the third slide bar 121 and the second threaded rod 122; the two slide bars 123 are respectively threadedly connected and slidably connected to the second threaded rod 122 and the third slide bar 121; the same connecting support plate 124 is provided on the two slide bars 123; when working, The third servo motor 211 drives the worm 222 to rotate, and the worm 222 rotates on the fixed support frame 15. The worm 222 drives the worm wheel 234 to rotate, so that the worm wheel 234 drives the connecting shaft 235 to rotate, and the connecting shaft 235 drives the second threaded rod 122 connected thereto to rotate, so that the second threaded rod 122 drives the sliding rod 123 threadedly connected thereto to move up and down, and at the same time, the sliding rod 123 on the other side slides synchronously on the third sliding rod 121, so that the two sliding rods 123 drive the connecting support plate 124 to move up and down, and adjust the detection height of the industrial camera 13 and the laser emitting device 14 on the connecting support plate 124, thereby facilitating the industrial camera 13 and the laser emitting device 14 to better detect, and the worm wheel 234 worm 222 structure has self-locking property, so that when the height of the connecting support plate 124 is adjusted, it is more stable; the driving and adjusting component realizes a stable and precise height adjustment function through the worm wheel 234 worm 222 structure, and provides a better detection height for the industrial camera 13 and the laser emitting device 14.

[0043] like Figure 6 As shown, the connecting support plate 124 is equipped with an industrial camera 13 and a laser emitting device 14; when working, the laser emitting device 14 emits a laser beam to the surface of the photovoltaic module, uses the laser beam to scan the surface of the crystalline silicon cell, and detects printing defects by measuring the change of reflected light or transmitted light. This method has the characteristics of high precision and high speed, and is suitable for quality inspection of large-scale automated production lines; the industrial camera 13 and image processing algorithm are used to accurately identify and analyze the printed pattern on the surface of the photovoltaic module. This method can detect defects such as printing offset, broken line, virtual printing, etc., and has the characteristics of fast detection speed and high accuracy.

[0044] like Figure 4 , 5As shown, the two ends of the first sliding block 64 are slidably connected with second sliding rods 65, and the ends of the two second sliding rods 65 away from the first sliding block 64 are fixed on the same mounting support plate 62; two buffer pads 46 are installed at the bottom of the first detection plate 45; when working, the buffer pad 46 buffers the first detection plate 45 and the first driving block 3 when the first detection plate 45 moves to reset toward the first driving block 3, and when the electric push rod 63 drives the first sliding block 64 to slide, the first sliding block 64 slides on the second sliding rod 65, and the second sliding rod 65 provides additional support for the first sliding block 64, thereby reducing the shaking or vibration caused by the movement.

[0045] like Figure 1 As shown, four moving wheels 18 are installed at the bottom of the bottom support frame 16; a mounting plate 19 is installed at one end of the bottom support frame 16; three mounting grooves 20 are opened on the mounting plate 19; when working, the moving wheels 18 drive the detector to move as a whole, and the detector can be fixed by installing external bolts in the mounting grooves 20 on the mounting plate 19, thereby reducing the movement of the detector as a whole during operation and affecting the detection.

[0046] A method for using a PL detector is mainly applicable to the above-mentioned PL detector, and mainly includes the following steps:

[0047] S1: First, the photovoltaic component is placed on the first inspection plate 45 on the first inspection component through an external loading mechanism, and the vacuum suction groove 7 on the first inspection plate 45 adsorbs and fixes the photovoltaic component;

[0048] S2: Start the second servo motor 10, and the second servo motor 10 drives the first drive block 3 and the second drive block 5 to move toward the detection device through the first screw 2, and then detects the first surface of the photovoltaic component on the first detection plate 45. The second servo motor 10 drives the photovoltaic component on the first drive block 3 to move through the first screw 2, and the industrial camera 13 takes pictures. The high-resolution camera and image processing algorithm are used to identify and analyze the printed pattern on the surface of the crystalline silicon cell to determine whether there are defects such as printing offset, broken wire, and virtual printing on the photovoltaic component. The laser emitting device 14 emits laser to the surface of the photovoltaic component, and scans the surface of the crystalline silicon cell with a laser beam. Printing defects are detected by measuring changes in reflected light or transmitted light, and the first surface of the photovoltaic component is detected.

[0049] S3: The second servo motor 10 drives the first driving block 3 through the first screw rod 2, and at the same time, the first gear 43 on the first detection assembly rotates by meshing with the first rack 17, thereby driving the first detection plate 45 on the first detection assembly to fit with the second detection plate 68, so that the second detection plate 68 adsorbs and fixes the photovoltaic assembly, and then the first servo motor 66 drives the second detection plate 68 to flip, so that the other detection surface of the photovoltaic assembly is exposed;

[0050] S4: Then the second servo motor 10 drives the first drive block 3 and the second drive block 5 to reset through the first screw 2. At the same time, the industrial camera 13 and the laser emitting device 14 detect the other detection surface of the photovoltaic module again. The double-sided detection of the photovoltaic module is completed, and then the external unloading mechanism transfers the photovoltaic module to the next production line to complete the double-sided detection of the double-sided photovoltaic module.

[0051] Working principle: When working, firstly, the photovoltaic component is placed on the first detection plate 45 on the first detection component through the external feeding mechanism, and the vacuum suction groove 7 on the first detection plate 45 adsorbs and fixes the photovoltaic component, and then the second servo motor 10 drives the first screw 2 to rotate, so that the first screw 2 drives the first drive block 3 and the second drive block 5 connected thereto to move toward the detection mechanism. The first detection plate 45 moves along with the movement of the first drive block 3, so that the photovoltaic component on the first detection plate 45 passes through the detection area and is photographed by the industrial camera 13. The laser emitting device 14 emits laser to the surface of the photovoltaic component, and uses the laser beam to scan the surface of the crystalline silicon cell. Scanning, and then detecting the first side of the photovoltaic component, after the detection is completed, the second servo motor 10 continues to drive the first driving block 3 and the first detection plate 45 connected thereto to move forward through the first screw rod 2. While moving, the first gear 43 on one side of the first driving block 3 is connected to the first rack 17 for meshing, and then the first gear 43 rotates on the first rack 17, thereby driving the first threaded rod 41 connected to the first gear 43 to rotate, and then the second threaded rod 122 drives the sliding link 44 threadedly connected thereto to move upward, and at the same time, another sliding link 44 rises synchronously with the second sliding rod 65, and the two sliding links 44 drive the first detection plate 45 to move upward, and at the same time, the second The electric push rod 63 on the detection component pushes the second detection plate 68 to move forward, so that the first detection plate 45 and the second detection plate 68 are fitted together, the vacuum suction groove 7 on the first detection plate 45 is loosened, and the vacuum suction on the second detection plate 68 is adsorbed and fixed again, and then the first servo motor 66 drives the second detection plate 68 to flip, exposing the other side of the photovoltaic component, and then the second servo motor 10 drives the first drive block 3 and the second drive block 5 and the second detection plate 68 through the first screw 2 to reset. When the second detection plate 68 passes through the detection area, the industrial camera 13 and the laser emitting device 14 detect the other detection surface of the photovoltaic component again, and at the same time, the second detection plate 68 is reset. When the photovoltaic module is in the right position, the first gear 43 rotates on the first rack 17 to drive the first detection plate 45 to reset, so as to facilitate the re-detection of the photovoltaic module. The first drive block 3 and the second drive block 5 are reset, and then the double-sided detection of the photovoltaic module is completed, thereby improving the detection efficiency; the detector can automatically flip the photovoltaic module to realize the double-sided detection of the photovoltaic module, without manual flipping, which saves time and avoids the errors that may be caused by manual operation; the whole detection process is highly automated, from the loading of the photovoltaic module to the double-sided detection, and then to the reset to prepare for the next detection, which are all automatically completed by the motor and mechanical structure, which greatly reduces manual intervention and improves work efficiency;During operation, after the inspection of the first surface of the photovoltaic component is completed, the sliding connecting rod 44 drives the first inspection plate 45 to move upward. At the same time, the electric push rod 63 pushes the first sliding block 64 to slide forward, so that the second inspection plate 68 is aligned with the first inspection plate 45. After the alignment is completed, the first inspection plate 45 is raised to fit the second inspection plate 68, and the first inspection plate 45 vacuum releases the photovoltaic component, and then the vacuum suction groove 7 of the second inspection plate 68 is adsorbed and fixed. After the fixation is completed, the first servo motor 66 drives the rotating shaft 67 to rotate, and then the rotating shaft 67 drives the second inspection plate 68 to flip, so that the second inspection surface of the photovoltaic component is exposed, and then the second servo motor 10 drives the first drive block 3 and the second drive block 5 and the second inspection plate 68 to reset through the first screw 2. At the same time of resetting, when the second inspection plate 68 passes through the inspection area When the photovoltaic module is in the field, the industrial camera 13 and the laser emitting device 14 detect the other detection surface of the photovoltaic module again. When the detection is completed, the first driving block 3 and the second driving block 5 are reset. Then the photovoltaic module is taken out by the external unloading mechanism, and the first servo motor 66 resets the first detection plate 45. The electric push rod 63 is extended and retracted through the first sliding block 64 to drive the first detection plate 45 to extend and retract, so that the first detection plate 45 is extended and retracted to the installation support frame, reducing the impact on the first detection plate 45 to place and detect the first surface of the photovoltaic module; through the automated flipping and resetting mechanism, the two sides of the photovoltaic module can be quickly inspected, reducing manual intervention and waiting time. Through the cooperation of the electric push rod 63 and the sliding block, the first detection plate 45 can be extended and retracted to the installation support frame when not in use, thereby saving space in the detection area. ;

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A PL detector, comprising a mounting frame (1); characterized in that: The mounting frame (1) is rotatably connected to a first screw rod (2); the first screw rod (2) is threadedly connected to a first driving block (3) and a second driving block (5); the first driving block (3) is mounted with a first detection assembly; the second driving block (5) is mounted with a second detection assembly; the first driving block (3) is connected to the second driving block (5); a first rack (17) is mounted on one end of the mounting frame (1) away from the first driving block (3); The first detection assembly comprises a first threaded rod (41) and a first sliding rod (42); the first threaded rod (41) and the first sliding rod (42) are installed on both sides of the first driving block (3), and the first threaded rod (41) is rotatably connected to one side of the first driving block (3); the first threaded rod (41) and the first sliding rod (42) are provided with sliding connecting rods (44), and the two sliding connecting rods (44) are respectively threadedly connected and slidably connected to the first threaded rod (41) and the first sliding rod (42); the top of the two sliding connecting rods (44) is installed with the same first detection plate (45); the bottom of the first threaded rod (41) is installed with a first gear (43).

2. A PL detector according to claim 1, characterized in that: The second detection assembly comprises a connecting support frame (61); a mounting support plate (62) is installed on the top of the connecting support frame (61); an electric push rod (63) is installed on the mounting support plate (62); a first sliding block (64) is installed on one end of the electric push rod (63); a first servo motor (66) is installed on the first sliding block (64); a rotating shaft (67) is installed on the output shaft of the first servo motor (66); a second detection plate (68) is installed on the rotating shaft (67); and vacuum suction grooves (7) are installed on the first detection plate (45) and the first detection plate (45).

3. A PL detector according to claim 1, characterized in that: Support sliders (8) are installed on both sides of the second driving block (5); support slide bars (9) are slidably connected to the support sliders (8); both ends of the two support slide bars (9) are installed on the same mounting frame (1); a second servo motor (10) is installed at one end of the mounting frame (1); and the output shaft of the second servo motor (10) is connected to one end of the first screw rod (2).

4. A PL detector according to claim 1, characterized in that: A bottom support frame (16) is installed at the bottom of the mounting frame (1); a fixed support frame (15) is installed on the bottom support frame (16); an adjustment assembly is installed on the fixed support frame (15); the adjustment assembly comprises a second sliding rod (65) and a second threaded rod (122); a sliding rod (123) is installed on the third sliding rod (121) and the second threaded rod (122); the two sliding rods (123) are respectively threadedly connected and slidably connected to the second threaded rod (122) and the third sliding rod (121); and the same connecting support plate (124) is installed on the two sliding rods (123).

5. A PL detector according to claim 4, characterized in that: An industrial camera (13) and a laser emitting device (14) are installed on the connecting support plate (124); and a driving component is installed on the fixed support frame (15).

6. A PL detector according to claim 5, characterized in that: The driving assembly comprises a third servo motor (211); the third servo motor (211) is mounted on a fixed support frame (15); a worm (222) is mounted on an output shaft of the third servo motor (211); both ends of the worm (222) are rotatably connected to the fixed support frame (15); a worm wheel (234) is meshingly connected to the worm (222); a connecting shaft (235) is mounted on the worm wheel (234); and the connecting shaft (235) is connected to the top of the first screw (2).

7. A PL detector according to claim 2, characterized in that: The two ends of the first sliding block (64) are slidably connected to second sliding rods (65), and the ends of the two second sliding rods (65) away from the first sliding block (64) are fixed on the same mounting support plate (62); and two buffer pads (46) are installed at the bottom of the first detection plate (45).

8. A PL detector according to claim 4, characterized in that: Four moving wheels (18) are installed at the bottom of the bottom support frame (16); a mounting plate (19) is installed at one end of the bottom support frame (16); and three mounting grooves (20) are opened on the mounting plate (19).

9. A method for using a PL detector, characterized in that: The method for using the PL detector is mainly applicable to a PL detector described in claims 1 to 8, and mainly comprises the following steps: S1: First, the photovoltaic component is placed on the first detection plate (45) on the first detection component through an external loading mechanism, and the vacuum suction groove (7) on the first detection plate (45) adsorbs and fixes the photovoltaic component; S2: starting the second servo motor (10), the second servo motor (10) drives the first drive block (3) and the second drive block (5) to move toward the detection device through the first screw (2), and then detects the first surface of the photovoltaic module on the first detection plate (45), the second servo motor (10) drives the photovoltaic module on the first drive block (3) to move through the first screw (2), and the industrial camera (13) takes pictures, and uses a high-resolution camera and an image processing algorithm to identify and analyze the printed pattern on the surface of the crystalline silicon cell to determine whether there are defects such as printing offset, broken lines, and virtual printing on the photovoltaic module, the laser emitting device (14) emits laser to the surface of the photovoltaic module, and uses the laser beam to scan the surface of the crystalline silicon cell, and detects printing defects by measuring changes in reflected light or transmitted light, and the detection of the first surface of the photovoltaic module is completed; S3: The second servo motor (10) drives the first driving block (3) through the first screw rod (2), and at the same time, the first gear (43) on the first detection component rotates by meshing with the first rack (17), thereby driving the first detection plate (45) on the first detection component to fit with the second detection plate (68), so that the second detection plate (68) adsorbs and fixes the photovoltaic component, and then the first servo motor (66) drives the second detection plate (68) to flip, so that the other detection surface of the photovoltaic component is exposed; S4: After the detection of one side of the photovoltaic module is completed, the second servo motor (10) drives the first drive block (3) and the second drive block (5) to reset through the first screw (2), and at the same time, the industrial camera (13) and the laser emitting device (14) detect the other detection side of the photovoltaic module again. After the double-sided detection of the photovoltaic module is completed, the external unloading mechanism transfers the photovoltaic module to the next production line, thereby completing the double-sided detection of the double-sided photovoltaic module.

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