Shape detection system and method for forming structure of photovoltaic module

Abstract

The invention relates to a photovoltaic module forming structure appearance detection system and method, and belongs to the technical field of diode detection, the system comprises a rack, the rack is provided with a conveying assembly used for conveying a photovoltaic module, and the conveying assembly is provided with a detection assembly used for detecting the appearance of the photovoltaic module. A size detection assembly, a hole pattern detection assembly and a visual appearance detection assembly are sequentially arranged on the rack in the conveying direction of the photovoltaic module. The size detection assembly is used for detecting whether the size of the photovoltaic module reaches the standard or not, the hole pattern detection assembly is used for judging whether a hole formed in the photovoltaic module reaches the standard or not, and the visual appearance detection assembly is used for judging whether the appearance of the photovoltaic module reaches the standard or not; the device further comprises a controller and a screening assembly, and the controller is used for controlling the screening assembly to screen up-to-standard and down-to-standard photovoltaic modules based on detection results of the size detection assembly, the hole pattern detection assembly and the visual appearance detection assembly. The photovoltaic module appearance detection method has the effect of improving the detection efficiency and the detection accuracy of photovoltaic module appearance detection.

Description

Technical Field

[0001] This application relates to the technical field of diode detection, and in particular to a forming structure appearance detection system and method for a photovoltaic module. Background Art

[0002] During the use of solar cell modules, some positions may be shaded, and thus consume energy and generate heat as a load, which is the hot spot effect, and it has a serious destructive effect on the modules. A photovoltaic module (i.e., a bypass diode) is a diode used in parallel at both ends of a solar cell module to help the solar cell module avoid damage to the battery module caused by the hot spot effect. After such diodes are processed and formed, generally, their appearance needs to be detected, such as verifying their dimensions, whether there are defects or damages on the surface, and whether the surface printing meets the standards. Currently, the verification method is generally manual visual screening. However, since photovoltaic modules are generally mass-produced, the above verification method not only has low detection efficiency, but also its detection accuracy is easily reduced due to human misjudgment, so it needs to be improved. Summary of the Invention

[0003] In order to improve the detection efficiency and detection accuracy of the appearance detection of photovoltaic modules, this application provides a forming structure appearance detection system and method for a photovoltaic module.

[0004] In a first aspect, this application provides a forming structure appearance detection system for a photovoltaic module, including a frame. On the frame, there is a conveying component for conveying the photovoltaic module. Along the conveying direction of the photovoltaic module, a size detection component, a hole type detection component, and a visual appearance detection component are sequentially arranged on the frame. The size detection component is used to detect whether the size of the photovoltaic module meets the standard. The hole type detection component is used to determine whether the holes opened on the photovoltaic module meet the standard. The visual appearance detection component is used to determine whether the appearance of the photovoltaic module meets the standard. It further includes a controller and a screening component. The controller is used to control the screening component to screen the qualified and unqualified photovoltaic modules based on the detection results of the size detection component, the hole type detection component, and the visual appearance detection component.

[0005] By adopting the above technical solutions, a variety of and comprehensive quality detections of multiple photovoltaic module products are realized by setting multiple detection components such as a size detection component, a hole type detection component, and a visual appearance detection component. The conveying component is used to automatically convey the photovoltaic module sequentially to all the above components for detection, and the above detection components are used to automatically screen out the good products and defective products after each detection, replacing manual quality inspection with automated machinery to improve the quality inspection efficiency and quality inspection accuracy.

[0006] Optionally, the conveying assembly includes a movable ring rotatably connected to the frame, a rotating member for driving the movable ring to rotate, a plurality of suction members circumferentially distributed along the movable ring, a lifting member for driving the movable ring to lift, and a first conveyor belt for supplying photovoltaic modules; the suction members are used to adsorb the photovoltaic modules, and the suction members can rotate above the end of the first conveyor belt during the rotation of the movable ring, and adsorb the photovoltaic modules at the end of the conveyor belt by the downward action of the lifting member; the size detection assembly, the hole type detection assembly and the visual appearance detection assembly are used to detect the photovoltaic modules adsorbed by the suction members.

[0007] By adopting the above technical solution, the photovoltaic module to be detected is conveyed to the lower part of the rotation path of the suction member by the first conveyor belt, so that the suction member can move down under the drive of the lifting member and adsorb the photovoltaic module at the end of the conveyor belt. And with the rotation of the movable ring, all the suction members on the movable ring can adsorb a photovoltaic module, so as to realize the uninterrupted detection of the size detection assembly, the hole type detection assembly and the visual appearance detection assembly, and improve the detection efficiency.

[0008] Optionally, both the size detection assembly and the screening assembly are controlled by a controller. The size detection assembly includes a first detection table, a first docking rod, a first spring, and a first pressure sensor; each of the suction members is correspondingly connected with a yield spring and is slidably connected to the movable ring along the lifting direction of the lifting member through the corresponding yield spring; a docking ring is further provided on the frame, and the lifting member is used to drive the movable ring and the docking ring to lift together. A slot for inserting a qualified photovoltaic module is formed on the first detection table; the distance that the lifting member drives the suction member to descend satisfies: the qualified photovoltaic module adsorbed by the suction member moves down and is inserted into the slot. The first docking rod is slidably connected to the docking ring through the first spring, and the sliding direction of the first docking rod relative to the docking ring is parallel to the lifting direction of the movable ring and the docking ring. When the target suction member moves above the first detection table, the first docking rod is located above the target suction member, where the target suction member is any one of the suction members. When the first spring and the yield spring are not deformed, the distance between the lower end of the first docking rod and the top end of the target suction member is not greater than the depth of the slot. The first pressure sensor is located at the other end of the first docking rod to detect the pressing force of the first docking rod on the first pressure sensor when the first docking rod moves upward relative to the docking ring. The controller is used to obtain the detection result of the first pressure sensor and control the screening assembly to discharge the photovoltaic module adsorbed by the suction member above the first detection table when the detection result is a defective product.

[0009] By adopting the above technical solution, only photovoltaic modules that meet the size requirements can be inserted into the slots. For photovoltaic modules that are too large to be inserted into the slots, the photovoltaic modules will be blocked by the upper surface of the first inspection table and cannot move downward, thereby causing the adsorption member to move upward and push the first docking rod, so that the first docking rod moves upward and presses the first pressure sensor, thereby causing the first pressure sensor to detect the corresponding pressing force. At this time, the controller can be used to control the first screening member to discharge the photovoltaic modules (i.e., defective products) adsorbed by the adsorption member above the first inspection table.

[0010] Optionally, the hole type detection component is controlled by a controller, and the hole type detection component includes a second detection platform, a pin disposed on the second detection platform, a second spring disposed on the docking ring and a second docking rod, and a second pressure sensor disposed at the end of the second docking rod; the lifting member drives the adsorption member to descend by a distance that satisfies: the qualified photovoltaic module adsorbed by the adsorption member moves downward, and the pin passes through the preset hole of the qualified photovoltaic module; The second docking rod is slidably connected to the docking ring through a second spring, and the sliding direction of the second docking rod relative to the docking ring is parallel to the lifting direction of the movable ring and the docking ring, and when the target adsorption component moves above the second detection platform, the second docking rod is located above the target adsorption component; When the second spring and the yield spring are not deformed, the distance between the lower end of the second docking rod and the top of the target adsorption component is not greater than the length of the ejector pin. The second pressure sensor is located at the other end of the second docking rod to detect the pressure of the second docking rod on the second pressure sensor when the second docking rod moves upward relative to the docking ring. The controller is used to obtain the detection result of the second pressure sensor and control the screening assembly to discharge the photovoltaic module adsorbed by the adsorption component above the second inspection platform when the detection result is a defective product.

[0011] By adopting the above technical solution, for photovoltaic modules whose sizes are smaller than the standard sizes, or whose preset holes on the photovoltaic modules do not meet the standards or are not penetrated (i.e., defective products), when such defective products are sucked to the top of the second inspection platform by the adsorption member and moved downward by the lifting member, the ejector pin will not be able to be inserted into the preset hole. At this time, the defective product will be pushed by the ejector pin, causing the adsorption member to move upward and the second docking rod to move upward, thereby causing the second pressure sensor to detect the pressure from the upward movement of the second docking rod, so that the controller controls the second screening member to discharge the photovoltaic modules adsorbed by the adsorption member above the second inspection platform, thereby achieving the screening of the defective products.

[0012] Optionally, the visual appearance detection component includes a third detection table, a camera device, and a plurality of light sources; the camera device is arranged outside the third detection table for taking a detection image with the image of the upper surface of the third detection table; the plurality of light sources are located outside the third detection table and irradiate the third detection table from a preset angle, and when the photovoltaic module is on the third detection table, the photovoltaic module will be irradiated by the light source and project a shadow surface on the surface of the third detection table, and the shadow surface is included in the detection image taken by the camera device; the controller is used to obtain the detection image, compare the detection image with a preset reference image, and when the comparison result is a defective product, control the screening component to discharge the photovoltaic module on the third detection table; wherein, the reference image includes the shadow surface generated by the qualified photovoltaic module irradiated by the light source on the third detection table.

[0013] By adopting the above technical solution, since the structure of the photovoltaic module is not a plane and involves bending parts, and due to the single shooting angle of the camera device, the image taken by it is not easy to completely show the bending part and the bending degree of the photovoltaic module. Therefore, this application proposes to use the light and shadow formed by irradiating the photovoltaic module with a light source as a comparison element, and further use the projected light and shadow to reflect the bending degree of the photovoltaic module during the process of comparing the images, so as to optimize the quality inspection effect of the appearance of the photovoltaic module.

[0014] Optionally, the detection image includes the light and shadow images corresponding to each light source irradiating the photovoltaic module on the third detection table alone. The controller is used to obtain all the light and shadow images, and based on all the light and shadow images, verify whether the photovoltaic module shifts during the process of being irradiated by different light sources and being photographed. If it shifts, after correcting all the light and shadow images, then compare the light and shadow images with the preset reference image, and determine that the comparison result is a defective product when the comparison is inconsistent; wherein, the preset reference image includes the light and shadow images corresponding to the qualified photovoltaic module.

[0015] By adopting the above technical solution, considering that the photovoltaic module shifts during the process of being irradiated by a single light source and being photographed, resulting in inconsistent comparison between the light and shadow image and the preset reference image, and further leading to misjudgment of whether the product is a good product and increasing the defective rate, this application specifically adds a verification operation during the comparison process, corrects the light and shadow images corresponding to the shifted photovoltaic module, and then uses the corrected light and shadow images to re-perform the comparison and determination to improve the detection accuracy.

[0016] Optionally, all the light sources satisfy the following condition: for each light source, when irradiating a photovoltaic module that meets the standard alone, there is a light and shadow image in other light and shadow images that has a common shadow surface with it; the controller also prestores associated light and shadow images and their corresponding reference shadow surfaces; the associated light and shadow images refer to light and shadow images that have a reference shadow surface and an associated relationship, and the reference shadow surface is the common shadow surface existing between the light and shadow images corresponding to the photovoltaic modules prestored by the controller and meeting the standard. The controller is configured to, after obtaining the light and shadow image, verify whether there is a common shadow surface in the light and shadow images with an associated relationship. If there is no common shadow surface or the existing common shadow surface is inconsistent with the corresponding reference shadow surface, it is verified that the photovoltaic module is offset.

[0017] By adopting the above technical solution, the common shadow surface generated by the light and shadow images taken when any two light sources irradiate alone is directly found, and the common shadow surface is compared with the corresponding reference shadow surface to realize the verification of whether the photovoltaic module is offset.

[0018] Optionally, when the controller determines that the light and shadow image is inconsistent with the preset reference image, based on the prestored different deformation types and the shadow surfaces corresponding to the deformation degree of each deformation type, it determines whether the deformation degree of the photovoltaic module corresponding to the light and shadow image is within the preset deformation tolerance range. If not, it is determined that the comparison result is a defective product, otherwise it is a non-defective product.

[0019] By adopting the above technical solution, if the deformation degree of the photovoltaic module is within the preset deformation tolerance range, it is considered that the deformation type and deformation degree of the photovoltaic module do not affect the actual use, so as to optimize the determination scheme and indirectly improve the non-defective product rate. Optionally, the screening assembly includes ropes, limit springs and motors corresponding to the adsorbing members one by one; the adsorbing members are slidably connected to the movable ring along the radial direction of the movable ring through the limit springs, one end of each rope is connected to the corresponding adsorbing member, and the other end is connected to the driving end of the corresponding motor. The motors are arranged on the movable ring and are controlled by the controller; the defective product recovery tracks respectively correspond to the size detection assembly, the hole type detection assembly and the visual appearance detection assembly, and the defective product recovery tracks are located below the radial sliding paths of the corresponding adsorbing members relative to the movable ring.

[0020] By adopting the above technical solution, the controller starts the motor to wind the rope, so that the limiting member moves above the corresponding defective product recovery track under the pulling of the rope, then pauses the motor for a specified time length and controls the adsorbing member to release the adsorption of the photovoltaic module. During this period, the limit spring deforms. After pausing for the specified time length, the motor is restarted and reversed to release the wound rope, so that the adsorbing member resets under the elastic force of the corresponding limit spring. Second aspect, the present application also discloses a method for detecting the shape of a formed structure of a photovoltaic module, which is applied to the detection system for the shape of the formed structure of the photovoltaic module as described in the first aspect, and includes: Using the transportation component to sequentially transport the photovoltaic module to be tested to the size detection component, the hole type detection component, and the visual appearance detection component; Detecting whether the size of the photovoltaic module meets the standard through the size detection component; detecting the size of the holes opened on the photovoltaic module and whether the holes are penetrated through the hole type detection component; taking an appearance image of the photovoltaic module through the visual appearance detection component and detecting whether there are defects; The controller obtains the detection results of the size detection component, the hole type detection component, and the visual appearance detection component, and controls the screening component to screen the photovoltaic modules that pass the detection and those that do not pass the detection.

[0021] In summary, the present application includes the following beneficial technical effects: By setting multiple detection components such as the size detection component, the hole type detection component, and the visual appearance detection component, diversified and comprehensive quality detection of multiple photovoltaic module products is realized. The transportation component is used to automatically transport the photovoltaic module sequentially to all the above-mentioned components for detection, and the above-mentioned detection components are used to automatically screen out good products and defective products after each detection, replacing manual quality inspection with automated machinery, improving the quality inspection efficiency and accuracy. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a detection system for the shape of a formed structure of a photovoltaic module disclosed in Embodiment 1 of the present application.

[0023] Figure 2 is an enlarged schematic diagram for embodying the structures of the size detection component and the hole type detection component in Embodiment 1 of the present application.

[0024] Figure 3 is a structural block diagram of a detection system for the shape of a formed structure of a photovoltaic module disclosed in Embodiment 1 of the present application.

[0025] Figure 4 is a schematic structural diagram of a detection system for the shape of a formed structure of a photovoltaic module disclosed in Embodiment 2 of the present application.

[0026] Figure 5 is Figure 4 an enlarged schematic diagram of part A in

[0027] Description of reference numerals: 1. Frame; 11. Support column; 12. Docking ring; 2. Conveying assembly; 21. First conveyor belt; 22. Movable ring; 221. Support rod; 222. Slide block; 23. Rotating member; 24. Lifting member; 241. First cylinder; 242. Second cylinder; 25. Adsorbing member; 251. Connecting rod; 252. Yielding spring; 3. Dimension detection assembly; 31. First detection table; 311. Slot; 32. First docking rod; 33. First spring; 34. First pressure sensor; 4. Hole type detection assembly; 41. Second detection table; 42. Thimble; 43. Second spring; 44. Second docking rod; 45. Second pressure sensor; 5. Visual appearance detection assembly; 51. Third detection table; 52. Imaging device; 53. Light source; 6. Controller; 7. Screening assembly; 71. Second conveyor belt; 72. Third conveyor belt; 73. Pull rope; 74. Limiting spring; 75. Motor; 8. Photovoltaic module. Detailed implementation manners

[0028] The following further describes the present application in detail Figures 1-5 in conjunction with the accompanying drawings.

[0029] Embodiment 1 Embodiment 1 of the present application discloses a forming structure shape detection system for a photovoltaic module. Refer to Figure 1 and Figure 2 , the forming structure shape detection system for a photovoltaic module includes a frame 1, a conveying assembly 2 for conveying the photovoltaic module 8 is provided on the frame 1, a dimension detection assembly 3, a hole type detection assembly 4 and a visual appearance detection assembly 5 are provided on the frame 1, and the dimension detection assembly 3, the hole type detection assembly 4 and the visual appearance detection assembly 5 are sequentially arranged along the conveying direction of the conveying assembly 2 for the photovoltaic module 8. Among them, the dimension detection assembly 3 is used to detect whether the dimensions of the photovoltaic module 8 meet the standards, the hole type detection assembly 4 is used to detect whether the holes opened on the photovoltaic module 8 meet the standards, and the visual appearance detection assembly is used to determine whether the appearance of the photovoltaic module 8 meets the standards.

[0030] Refer to Figure 1 and Figure 2, the conveying assembly 2 specifically includes a first conveyor belt 21, a movable ring 22, a rotating member 23, a lifting member 24, and a number of suction members 25. A support column 11 is rotatably connected to the frame 1. The rotating member 23 can specifically be a motor, and the drive shaft of the rotating member 23 is connected to the end of the support column 11 for driving the support column 11 to rotate. The movable ring 22 is slidably connected to the support column 11 along the height direction of the support column 11, and the support column 11 is located at the center of the movable ring 22. The lifting member 24 includes a first cylinder 241. The first cylinder 241 is connected to the support column 11, and the driving end of the first cylinder 241 is connected to the movable ring 22 for driving the movable ring 22 to slide relative to the support column 11 in the height direction. A number of support rods 221 are provided along the circumferential direction of the movable ring 22. The support rods 221 correspond to the suction members 25 one by one, and the suction members 25 are connected to the ends of the corresponding support rods 221. The suction member 25 specifically includes a connecting rod 251, a yielding spring 252, and a vacuum suction cup. The yielding spring 252 is sleeved on the connecting rod 251. One end of the yielding spring 252 is connected to the connecting rod 251, and the other end is connected to the corresponding support rod 221. The vacuum suction cup is arranged at the lower end of the connecting rod 251, and the vacuum suction cup is communicated with an air extraction pump through an air pipe. Therefore, the conveying direction of the conveying assembly 2 for the photovoltaic module 8 is the rotating direction of the suction member 25 rotating around the support column 11, that is, Figure 1 the direction indicated by the dashed arrow in

[0031] The first conveyor belt 21 is located on one side of the support column 11, and the suction member 25 can rotate above the end of the first conveyor belt 21 along with the rotation of the movable ring 22 and the support column 11. At this time, when the first cylinder 241 drives the movable ring 22 to move downward, the suction member 25 that rotates above the end of the first conveyor belt 21 can adsorb the photovoltaic module 8 at the end of the first conveyor belt 21.

[0032] Referring to Figure 1 and Figure 2 , the size detection assembly 3 includes a first detection table 31, a first docking rod 32, a first spring 33, and a first pressure sensor 34. A slot 311 is opened on the first detection table 31, and the size of the slot 311 satisfies that only a single qualified photovoltaic module 8 can be inserted into the slot 311. A docking ring 12 is further fixedly connected to the frame 1. The docking ring 12 is located above the movable ring 22. The lifting member 24 further includes a second cylinder 242 for driving the docking ring 12 to lift and lower together with the movable ring 22. The driving end of the second cylinder 242 is connected to the movable ring 22. By simultaneously opening and closing the first cylinder 241 and the second cylinder 242, the synchronous lifting and lowering of the movable ring 22 and the docking ring 12 can be realized.

[0033] The first spring 33 is sleeved on the first docking rod 32, and the first docking rod 32 is slidably connected to the movable ring 22 through the first spring 33. The sliding direction of the first docking rod 32 relative to the docking ring 12 is parallel to the sliding direction of the connecting rod 251 relative to the movable ring 22 under the yielding action of the yielding spring 252. This sliding direction is the vertical direction disclosed in the embodiments of the present application, that is, the telescopic direction of the driving ends of the first cylinder 241 and the second cylinder 242.

[0034] The first pressure sensor 34 is connected to the docking ring 12 and is located at the upper end of the first docking rod 32. The first detection table 31 is located directly below the first docking rod 32. The connecting rod 251 can rotate with the rotation of the movable ring 22 to the position directly below the first docking rod 32, that is, between the first docking rod 32 and the first detection table 31. At this time, both the first spring 33 and the yielding spring 252 are deformed. The lower end of the first docking rod 32 is in contact with the upper end of the connecting rod 251, and the upper end of the first docking rod 32 is in contact with the corresponding first pressure sensor 34. At this time, the first cylinder 241 and the second cylinder 242 are started simultaneously to drive the first docking rod 32 and the connecting rod 251 to move downward, so that the photovoltaic module 8 adsorbed by the adsorber 25 is driven to move downward onto the first detection table 31. If the size of the photovoltaic module 8 meets the standard, then the photovoltaic module 8 will be smoothly inserted into the slot 311. If the size of the photovoltaic module 8 does not meet the standard, it will not be able to be inserted into the slot 311. At this time, the upper surface of the first detection table 31 near the slot 311 will block the downward movement of the photovoltaic module 8, causing the photovoltaic module 8 to move upward relative to the first detection table 31. As a result, the connecting rod 251 moves upward. At this time, the yielding spring 252 is compressed, and the upward movement of the connecting rod 251 will push the first docking rod 32 upward, so that the first docking rod 32 moves upward and contacts the first pressure sensor 34, so that the first pressure sensor 34 detects the pressure from the first docking rod 32. When the driving ends of the first cylinder 241 and the second cylinder 242 move upward and reset, the first docking rod 32 and the connecting rod 251 will slide and reset under the elastic force of the first spring 33 and the yielding spring 252, releasing the pressing on the first pressure sensor 34.

[0035] Refer to Figure 1 、 Figure 2 and Figure 3 In addition, the first pressure sensor 34 is electrically connected to a controller 6. The controller 6 is electrically connected to a warning light. The warning lights are arranged in one-to-one correspondence with the first docking rods 32 and are connected to the docking ring 12 near the corresponding first docking rods 32. The controller 6 is used to control the warning light to light up when the pressure detected by the first pressure sensor 34 is equal to the preset pressure value (that is, the pressing force when the first docking rod 32 pushes the first pressure sensor 34 upward), so as to remind the detection personnel that the photovoltaic module 8 on the first detection table 31 corresponding to the current warning light is a defective product with a non-compliant size.

[0036] Since the appearance structure of the photovoltaic module 8 is as follows Figure 2 The irregular structure shown in the figure, therefore, in this embodiment, there are several size detection components 3, and the slot 311 corresponding to each size detection component 3 has a different structure, that is, the slot 311 corresponding to each size detection component 3 is used for different areas of the photovoltaic module 8 to be inserted. Exemplary, Figure 2 Three structures of slots 311 are given, in which one slot 311 is used for inserting only the end of the photovoltaic module 8, the length of another slot 311 is consistent with the length of the photovoltaic module 8 that meets the standards, so as to detect whether the length of the photovoltaic module 8 meets the standards, and the width of another slot 311 is consistent with the width of the photovoltaic module 8 that meets the standards, so as to detect whether the width of the photovoltaic module 8 meets the standards.

[0037] The hole type detection assembly 4 includes a second detection platform 41, a thimble 42, a second spring 43, a second docking rod 44 and a second pressure sensor 45. The thimble 42 is arranged on the second detection platform 41, and the distribution position of the thimble 42 relative to the second detection platform 41 satisfies: when the qualified photovoltaic module 8 is placed on the second detection platform 41, the thimble 42 can penetrate the holes at the four vertex corners of the qualified photovoltaic module 8; so as to detect whether the preset holes on the photovoltaic module 8 are in a through state. The second docking rod 44 is located directly above the second inspection platform 41, the second spring 43 is sleeved on the second docking rod 44, and the second docking rod 44 is slidably connected to the docking ring 12 through the second spring 43, and the sliding direction is parallel to the driving direction of the second cylinder 242; the second pressure sensor 45 is arranged on the docking ring 12 and is located directly above the second docking rod 44, the adsorption member 25 can be rotated to between the second docking rod 44 and the second inspection platform 41 with the rotation of the movable ring 22, and when the second spring 43 and the yield spring 252 are both deformed, the lower end of the second docking rod 44 is attached to the upper end of the connecting rod 251, and the top end of the second docking rod 44 is attached to the second pressure sensor 45; when the lifting member 24 drives the second docking rod 44 and the adsorption member 25 to move downward so that the photovoltaic module 8 is placed on the second inspection platform During the process on the testing platform 41, if the preset hole on the photovoltaic module 8 is not penetrated or the opening position of the preset hole cannot be penetrated by the ejector pin 42, the ejector pin 42 will hinder the downward movement of the photovoltaic module 8, thereby causing the photovoltaic module 8 to move upward, the connecting rod 251 to move upward due to the squeezing of the photovoltaic module 8, and the second docking rod 44 to move upward due to the push of the connecting rod 251 and press the second pressure sensor 45, so that the second pressure sensor 45 detects a pressure value. The controller 6 is used to receive the pressure value detected by the second pressure sensor 45, and when the pressure value is equal to the preset pressure value (that is, the push force when the second docking rod 44 pushes the second pressure sensor 45 upward), control the preset warning light to light up, so as to remind the inspection personnel that the hole opened in the photovoltaic module 8 on the second testing platform 41 corresponding to the current warning light does not meet the standard.

[0038] The visual appearance detection component 5 specifically includes a third detection table 51 and a camera device 52. The camera device 52 is used to capture a detection image with the third detection table 51, and the third detection table 51 is located directly below the rotation path when the moving ring 22 of the adsorbing member 25 rotates. Therefore, when the photovoltaic module 8 is transported onto the third detection table 51 under the combined action of the adsorbing member 25, the lifting member 24, and the rotating member 23, the detection image captured by the camera device 52 at this time will include the photovoltaic module 8. The adsorption of the photovoltaic module 8 by the adsorbing member 25 can be released, and the adsorbing member 25 can be driven by the lifting member 24 to move upward, so that the photovoltaic module 8 is left on the third detection table 51, facilitating the detection camera device 52 to completely and clearly capture the photovoltaic module 8 in the detection image. The controller 6 is used to receive the detection image with the photovoltaic module 8, compare the detection image with the pre-stored image, and display the comparison result through a pre-connected display screen. Among them, the comparison result specifically includes the detection image and the determination result of whether the appearance meets the standard. If the comparison between the detection image and the pre-stored image is inconsistent, the determination result is non-compliant. Among them, the pre-stored image is the detection image captured when the compliant photovoltaic module 8 is on the third detection table 51.

[0039] Refer to Figure 1 、 Figure 2 and Figure 3 and further includes a screening component 7. The screening component 7 includes a second conveyor belt 71 and a third conveyor belt 72. The first conveyor belt 71, the second conveyor belt 71, and the third conveyor belt 72 are sequentially arranged along the conveying direction of the photovoltaic module 8, and the ends of the second conveyor belt 71 and the third conveyor belt 72 are both located directly below the rotation path when the adsorbing member 25 rotates with the moving ring 22. The second conveyor belt 71 is used to receive and output non-compliant photovoltaic modules 8, and the third conveyor belt 72 is used to receive and output compliant photovoltaic modules 8; At one end of the second conveyor belt 71 and the third conveyor belt 72 away from the frame 1, there are stacked receiving boxes. One end of the receiving box close to the second conveyor belt 71 and the third conveyor belt 72 is open and inclined upward. The open position of the receiving box at the bottom is facing the ends of the second conveyor belt 71 and the third conveyor belt 72 to receive the photovoltaic modules 8 conveyed by the second conveyor belt 71 and the third conveyor belt 72. When the bottom receiving box is full of photovoltaic modules 8, it can be taken out, so that the remaining empty receiving boxes move downward under their own weight, making the open position of the bottom empty receiving box face the ends of the second conveyor belt 71 and the third conveyor belt 72.

[0040] Correspondingly, the controller 6 is used to record the position of the adsorbent 25 that adsorbs the photovoltaic module 8 that does not meet the standard and the estimated time required to move to the second conveyor belt 71 when any of the size detection component 3, the hole type detection component 4 and the visual appearance detection component 5 obtains an unqualified detection result each time, and suspend the rotation of the movable ring 22 after the estimated time at the current moment, so that the adsorbent 25 just moves to the top of the end of the second conveyor belt 71, and then controls the adsorbent 25 to move down and release the adsorption of the photovoltaic module 8, and finally transports the unqualified photovoltaic module 8 to the second conveyor belt 71. Among them, when determining the position of the adsorbent 25 that adsorbs the photovoltaic module 8 that does not meet the standard, it is assumed that the position is the position of the first detection station 31 or the second detection station 41 or the third detection station 51, and the corresponding estimated time is the time for the adsorbent 25 to move from the top of the first detection station 31, the second detection station 41, and the third detection station 51 to the second conveyor belt 71. In other embodiments, a unique label may be pre-set for each adsorbent 25, and a scanning module (RFID tag scanner) may be provided above the second conveyor belt 71 to scan and read the label of the adsorbent 25 above the second conveyor belt 71 of each device. By recording the label of the adsorbent 25 that adsorbs the corresponding photovoltaic module 8 that does not meet the standard when a photovoltaic module 8 that does not meet the standard is detected, and when the scanning module scans the corresponding label, the rotation of the movable ring 22 is stopped, and the lifting member 24 and the adsorbent 25 release the corresponding photovoltaic module 8 that does not meet the standard onto the second conveyor belt 71.

[0041] Example 2 The difference between Example 2 of the present application and Example 1 is that: Figure 3 , Figure 4 and Figure 5 , the screening assembly 7 also includes a pull rope 73, a limit spring 74 and a motor 75 which are arranged in a one-to-one correspondence with the adsorption member 25. Each support rod 221 is connected with a slider 222 in a sliding manner along its length direction, and the connecting rod 251 penetrates the corresponding slider 222, and one end of the give way spring 252 is connected to the connecting rod 251, and the other end is connected to the slider 222. The limit spring 74 is sleeved on the corresponding support rod 221, and one end of the limit spring 74 is connected to the support rod 221, and the other end is connected to the slider 222, and one end of the pull rope 73 is connected to the corresponding slider 222, and the other end is connected to the driving shaft of the motor 75. When the limit spring 74 is not deformed, the connecting rod 251 can rotate with the rotation of the movable ring 22 to the top of the end of the first conveyor belt 21, the top of the end of the second conveyor belt 71, and the first detection platform 31, the second detection platform 41, and the third detection platform 51.

[0042] Reference Figure 3 , Figure 4 and Figure 5, each of the first inspection station 31, the second inspection station 41, and the third inspection station 51 corresponds to a second conveyor belt 71. The second conveyor belt 71 is located directly below the sliding path when the adsorbing member 25 above the first inspection station 31, the second inspection station 41, and the third inspection station 51 slides along the length direction of the corresponding support rod 221. Therefore, after a non-compliant photovoltaic module 8 is detected, the controller 6 will determine the position where the photovoltaic module 8 is located (i.e., the first inspection station 31 or the second inspection station 41 or the third inspection station 51), then control the motor 75 corresponding to the adsorbing member 25 that adsorbs the photovoltaic module 8 to start and move the adsorbing member 25 above the corresponding second conveyor belt 71, and then control the adsorbing member 25 to release the adsorption of the photovoltaic module 8, so as to discharge the non-compliant photovoltaic module 8.

[0043] Refer to Figure 3 , Figure 4 and Figure 5 , the visual appearance detection assembly 5 further includes a plurality of light sources 53. The plurality of light sources 53 are located outside the third inspection station 51 and irradiate the third inspection station 51 from a preset angle. When the photovoltaic module 8 is located on the third inspection station 51, the photovoltaic module 8 will be irradiated by the light sources 53 and project a shadow surface on the surface of the third inspection station 51, and the detected image captured by the corresponding imaging device 52 includes the shadow surface; and the detected image specifically includes the light and shadow images corresponding to each light source 53 irradiating the photovoltaic module 8 on the third inspection station 51 alone.

[0044] Furthermore, all the light sources 53 satisfy: for the light and shadow image corresponding to each light source 53 irradiating a compliant photovoltaic module 8 alone, there is a light and shadow image with a common shadow surface in other light and shadow images; the controller 6 also prestores the associated light and shadow images and their corresponding reference shadow surfaces, as well as the corresponding light sources 53; among them, the associated light and shadow image refers to the light and shadow image with a reference shadow surface, and the light and shadow image with a reference shadow surface is the light and shadow image with an associated relationship. The reference shadow surface is the common shadow surface existing between the light and shadow images corresponding to the compliant photovoltaic modules 8 prestored by the controller 6. The controller 6 is used to obtain all the light and shadow images, and based on the one-to-one correspondence between the light and shadow images and the light source 53, determine whether the light and shadow images with an associated relationship in the currently obtained light and shadow images have a common shadow surface. If there is no common shadow surface or the existing common shadow surface is inconsistent with the corresponding reference shadow surface, it is considered that the photovoltaic module 8 has shifted during the process of separately irradiating the photovoltaic module 8 with different light sources 53 and taking the corresponding light and shadow images. At this time, the controller 6 is used to correct all the light and shadow images to obtain corrected light and shadow images, and then compare each corrected light and shadow image with the preset reference image pre-stored in the controller 6. When the comparison is inconsistent, the comparison result is determined to be a defective product, that is, the unqualified photovoltaic module 8; among them, the reference preset image includes all the light and shadow images corresponding to the qualified photovoltaic module 8.

[0045] And the above correction method can specifically be: default that the placement position of the qualified photovoltaic module 8 in all the photovoltaic images corresponding to the qualified photovoltaic module 8 included in the reference preset image relative to the third detection table 51 is the reference position, and the controller 6 pre-stores the light and shadow images (hereinafter referred to as replacement images) corresponding to different offsets of the qualified photovoltaic module 8 relative to the reference position under the irradiation of each single light source 53. Correspondingly, during correction, for each light and shadow image (hereinafter referred to as the target light and shadow image), determine the offset degree of the photovoltaic module 8 (excluding the shadow surface) in the target light and shadow image relative to the reference position to find the corresponding replacement image from the pre-stored replacement images, and use the replacement image to replace the target light and shadow image to achieve correction.

[0046] Furthermore, the controller 6 is also used to, when it is determined that the light and shadow image is inconsistent with the preset reference image, based on the pre-stored different deformation types and the shadow surfaces (hereinafter referred to as shadow surface A) corresponding to each deformation type and the corresponding deformation degree, determine whether the deformation degree of the photovoltaic module 8 corresponding to the light and shadow image is within the preset deformation tolerance range. If not, the comparison result is determined to be a defective product, otherwise it is a qualified product. Each deformation type corresponds to one part of the photovoltaic module 8, such as the end or the side, and the corresponding deformation types are end deformation, side deformation, etc. The deformation tolerance range includes one or more specified shadow surfaces A among all the shadow surfaces A. If the shadow surface corresponding to the currently detected photovoltaic module 8 is consistent with any one of the shadow surfaces A included in the deformation tolerance range, it is considered to be within the preset deformation tolerance range.

[0047] The embodiment of the present application also discloses a method for detecting the formed structure and shape of a photovoltaic module, including the following steps: Use the transportation component to sequentially transport the photovoltaic module 8 to be tested to the size detection component 3, the hole type detection component 4, and the visual appearance detection component 5; The size detection component 3 is used to detect whether the size of the photovoltaic module 8 meets the standard; the hole type detection component is used to detect the size of the holes opened on the photovoltaic module 8 and whether the holes are penetrated; the visual appearance detection component 5 captures the appearance image of the photovoltaic module 8 and detects whether there are defects. The controller 6 obtains the detection results of the size detection component 3, the hole type detection component 4, and the visual appearance detection component 5, and controls the screening component 7 to screen the photovoltaic modules 8 that pass and fail the detection.

[0048] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0049] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting the protection scope of the application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope to be protected by the present application.

Claims

1. A photovoltaic module molding structure appearance detection system, characterized in that: The invention comprises a frame (1), wherein a conveying assembly (2) for conveying a photovoltaic module (8) is arranged on the frame (1), and a size detection assembly (3), a hole type detection assembly (4) and a visual appearance detection assembly (5) are arranged in sequence on the frame (1) along the conveying direction of the photovoltaic module (8); the size detection assembly (3) is used to detect whether the size of the photovoltaic module (8) meets the standard, the hole type detection assembly (4) is used to determine whether the hole opened on the photovoltaic module (8) meets the standard, and the visual appearance detection assembly (5) is used to determine whether the appearance of the photovoltaic module (8) meets the standard; and the invention also comprises a controller (6) and a screening assembly (7), wherein the controller (6) is used to control the screening assembly (7) to screen out photovoltaic modules (8) that meet the standard and those that do not meet the standard based on the detection results of the size detection assembly (3), the hole type detection assembly (4) and the visual appearance detection assembly (5).

2. The photovoltaic module molding structure appearance detection system according to claim 1, characterized in that: The conveying assembly (2) comprises a movable ring (22) rotatably connected to the frame (1), a rotating member (23) for driving the movable ring (22) to rotate, a plurality of adsorption members (25) distributed along the circumference of the movable ring (22), a lifting member (24) for driving the movable ring (22) to rise and fall, and a first conveyor belt (21) for supplying photovoltaic modules (8); the adsorption member (25) is used to adsorb the photovoltaic modules (8), and the adsorption member (25) can be rotated to the upper part of the end of the first conveyor belt (21) during the rotation of the movable ring (22), and adsorb the photovoltaic module (8) at the end of the conveyor belt through the descending action of the lifting member (24); the size detection assembly (3), the hole type detection assembly (4) and the visual appearance detection assembly (5) are used to detect the photovoltaic module (8) adsorbed by the adsorption member (25).

3. The photovoltaic module molding structure appearance detection system according to claim 2, characterized in that: The size detection component (3) and the screening component (7) are both controlled by a controller (6). The size detection component (3) comprises a first detection platform (31), a first docking rod (32), a first spring (33), and a first pressure sensor (34). Each of the adsorbents (25) is connected to a corresponding yielding spring (252), and is connected to the movable ring (22) by sliding along the lifting direction of the lifting component (24) through the corresponding yielding spring (252). The frame (1) is also provided with a docking ring (12), and the lifting component (24) is used to drive the movable ring (22) and the docking ring (12) to rise and fall together. The first detection platform (31) is provided with a slot (311) for inserting a qualified photovoltaic module (8). The lifting component (24) drives the adsorbent (25) to descend a distance that satisfies: the qualified photovoltaic module (8) adsorbed by the adsorbent (25) moves downward and is inserted into the slot (311). The first docking rod (32) is slidably connected to the docking ring (12) via a first spring (33), and a sliding direction of the first docking rod (32) relative to the docking ring (12) is parallel to a lifting direction of the movable ring (22) and the docking ring (12), and when the target adsorption component (25) moves above the first detection platform (31), the first docking rod (32) is located above the target adsorption component (25), wherein the target adsorption component (25) is any adsorption component (25); When the first spring (33) and the yield spring (252) are not deformed, the distance between the lower end of the first docking rod (32) and the top end of the target adsorption member (25) is not greater than the depth of the slot (311); the first pressure sensor (34) is located at the other end of the first docking rod (32) to detect the pressure of the first docking rod (32) against the first pressure sensor (34) when the first docking rod (32) moves upward relative to the docking ring (12); the controller (6) is used to obtain the detection result of the first pressure sensor (34) and, when the detection result is a defective product, control the screening component (7) to discharge the photovoltaic module (8) adsorbed by the adsorption member (25) above the first detection platform (31).

4. The photovoltaic module molding structure appearance detection system according to claim 3, characterized in that: The hole type detection assembly (4) is controlled by a controller (6), and comprises a second detection platform (41), a pin (42) disposed on the second detection platform (41), a second spring (43) and a second docking rod (44) disposed on the docking ring (12), and a second pressure sensor (45) disposed at the end of the second docking rod (44); the lifting member (24) drives the adsorption member (25) to descend by a distance that satisfies: the qualified photovoltaic module (8) adsorbed by the adsorption member (25) moves downward, and the pin (42) penetrates the preset hole of the qualified photovoltaic module (8); The second docking rod (44) is slidably connected to the docking ring (12) via a second spring (43), and a sliding direction of the second docking rod (44) relative to the docking ring (12) is parallel to a lifting direction of the movable ring (22) and the docking ring (12), and when the target adsorption component (25) moves to above the second detection platform (41), the second docking rod (44) is located above the target adsorption component (25); When the second spring (43) and the yield spring (252) are not deformed, the distance between the lower end of the second docking rod (44) and the top end of the target adsorption member (25) is not greater than the length of the ejector pin (42); the second pressure sensor (45) is located at the other end of the second docking rod (44) to detect the pressure of the second docking rod (44) against the second pressure sensor (45) when the second docking rod (44) moves upward relative to the docking ring (12); the controller (6) is used to obtain the detection result of the second pressure sensor (45), and when the detection result is a defective product, control the screening component (7) to discharge the photovoltaic module (8) adsorbed by the adsorption member (25) above the second inspection platform (41).

5. The photovoltaic module molding structure appearance detection system according to claim 1, characterized in that: The visual appearance detection assembly (5) comprises a third detection platform (51), a camera device (52), and a plurality of light sources (53); the camera device (52) is arranged outside the third detection platform (51) to capture a detection image with an image of the upper surface of the third detection platform (51); the plurality of light sources (53) are arranged outside the third detection platform (51) to illuminate the third detection platform (51) from a preset angle, and when the photovoltaic module (8) is located on the third detection platform (51), the photovoltaic module (8) is illuminated by the light source (53). The third inspection platform (51) is projected with a shadow surface, and the inspection image captured by the corresponding camera device (52) includes the shadow surface; the controller (6) is used to obtain the inspection image, and compare the inspection image with a preset reference image, and when the comparison result is a defective product, control the screening component (7) to discharge the photovoltaic module (8) on the third inspection platform (51); wherein the reference image includes the shadow surface of the photovoltaic module (8) that meets the standard and is illuminated by the light source (53) on the third inspection platform (51).

6. The photovoltaic module molding structure appearance detection system according to claim 5, characterized in that: The detection image includes a light and shadow image corresponding to each light source (53) when irradiating the photovoltaic module (8) on the third detection platform (51) individually. The controller (6) is used to obtain all the light and shadow images and, based on all the light and shadow images, verify whether the photovoltaic module (8) is offset during the process of being irradiated by different light sources (53) and photographed. If offset, all the light and shadow images are corrected and then compared with a preset reference image. When the comparison is inconsistent, the comparison result is determined to be a defective product; wherein the preset reference image includes the light and shadow image corresponding to the qualified photovoltaic module (8).

7. The photovoltaic module molding structure appearance detection system according to claim 6, characterized in that: All the light sources (53) satisfy the following conditions: for the light and shadow image corresponding to each light source (53) when illuminating a photovoltaic module (8) that meets the standards alone, there exists a light and shadow image that has a common shadow surface with the light and shadow image in other light and shadow images; the controller (6) also pre-stores associated light and shadow images and their corresponding reference shadow surfaces; the associated light and shadow images refer to light and shadow images that have a reference shadow surface and have an associated relationship, and the reference shadow surface is a common shadow surface that exists between the light and shadow images corresponding to the photovoltaic modules (8) that meet the standards that are pre-stored by the controller (6); The controller (6) is used to verify whether there is a common shadow surface between the associated light and shadow images after acquiring the light and shadow images, and if there is no common shadow surface or the existing common shadow surface is inconsistent with the corresponding reference shadow surface, then the photovoltaic module (8) is verified to be offset.

8. The photovoltaic module molding structure appearance detection system according to claim 7, characterized in that: The controller (6) is used to determine whether the deformation degree of the photovoltaic module (8) corresponding to the light and shadow image is within a preset deformation tolerance range based on different pre-stored deformation types and the shadow surface corresponding to the deformation degree corresponding to each deformation type when it is determined that the light and shadow image is inconsistent with the preset reference image. If not, the comparison result is determined to be a defective product, otherwise it is a good product.

9. The photovoltaic module molding structure appearance detection system according to claim 2, characterized in that: The screening component (7) comprises a pull rope (73), a limit spring (74) and a motor (75) which are arranged in a one-to-one correspondence with the adsorption component (25); the adsorption component (25) is connected to the movable ring (22) by the limit spring (74) along the radial sliding of the movable ring (22); one end of the pull rope (73) is connected to the adsorption component (25), and the other end is connected to the driving end of the corresponding motor (75); the motor (75) is arranged on the movable ring (22), and the motor (75) is controlled by a controller (6); the size detection component (3), the hole type detection component (4) and the visual appearance detection component (5) respectively correspond to defective product recovery tracks, and the defective product recovery tracks are located below the radial sliding path of the corresponding adsorption component (25) relative to the movable ring (22).

10. A method for detecting the molding structure and appearance of a photovoltaic module, applied to the molding structure and appearance detection system of a photovoltaic module as claimed in claim 1, characterized in that: include: The photovoltaic module (8) to be tested is transported in sequence to the size detection component (3), the hole type detection component (4) and the visual appearance detection component (5) by using the transport component; The size detection component (3) detects whether the size of the photovoltaic module (8) meets the standard; the hole type detection component (4) detects the size of the hole opened on the photovoltaic module (8) and whether the hole is through; the visual appearance detection component (5) takes an image of the appearance of the photovoltaic module (8) and detects whether there are any defects; The controller (6) obtains the detection results of the size detection component (3), the hole type detection component (4) and the visual appearance detection component (5), and controls the screening component (7) to screen and detect photovoltaic modules (8) that meet the standards and those that do not meet the standards.

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