Photovoltaic cell detection device and detection system

Abstract

The utility model provides a photovoltaic cell detection device and detection system, and relates to the technical field of photovoltaic cell manufacturing. The photovoltaic cell detection device comprises an air floating plate, a first conveying wheel set, a second conveying wheel set and an image acquisition unit, wherein a plurality of air floating holes are formed in the first surface of the air floating plate; the first conveying wheel set comprises a plurality of first conveying wheels, the first conveying wheels are arranged on the two sides, in the first direction, of the air floating plate at intervals in the second direction, and the first conveying wheels are rotationally arranged in the first direction; the second conveying wheel set comprises a plurality of second conveying wheels, the second conveying wheels are arranged on the two sides, in the first direction, of the air floating plate at intervals in the second direction, and the second conveying wheels are rotationally arranged in the third direction; and the image acquisition unit and the first surface of the air floating plate are arranged at an interval, and the image acquisition unit is used for acquiring an image of the photovoltaic cell and analyzing and judging defect parameters of the photovoltaic cell according to the image of the photovoltaic cell.

Description

Technical Field

[0001] The present disclosure relates to the technical field of glass production, and particularly to a photovoltaic cell detection device and a detection system. Background Art

[0002] In the photovoltaic industry, the cell is getting thinner and thinner, and there are many production and processing links for the cell. During the production and processing of the cell, defects such as broken pieces, hidden cracks, notches, and scratches are likely to occur. These defects seriously affect the performance and stability of the cell. Therefore, defect detection is required before the cell leaves the factory.

[0003] Currently, most producers use manual detection methods, which not only have low efficiency but also low detection accuracy, seriously affecting the production efficiency of the production line and the product quality. Summary of the Utility Model

[0004] One technical problem to be solved by the present disclosure is: Before the existing photovoltaic cells leave the factory, they need to be manually inspected for quality, but the detection efficiency is low and the accuracy is not high, affecting the production efficiency of the production line and the product quality.

[0005] To solve the above technical problem, an embodiment of the present disclosure provides a photovoltaic cell detection device, which includes:

[0006] An air floating plate, on which a plurality of air floating holes are provided on the first surface.

[0007] A first conveyor wheel group, which includes a plurality of first conveyor wheels. The plurality of first conveyor wheels are arranged at intervals along the second direction on both sides of the air floating plate along the first direction. The first conveyor wheels are rotatably arranged around the first direction, and the first conveyor wheels are used to movably support the photovoltaic cell.

[0008] A second conveyor wheel group, which includes a plurality of second conveyor wheels. The plurality of second conveyor wheels are arranged at intervals along the second direction on both sides of the air floating plate along the first direction. The second conveyor wheels are rotatably arranged around the third direction, and the second conveyor wheels are used to movably abut against the side wall of the photovoltaic cell; wherein, the third direction is the thickness direction of the air floating plate, and both the first direction and the second direction are perpendicular to the third direction.

[0009] An image acquisition unit, which is arranged at an interval from the first surface of the air floating plate. The image acquisition unit is used to acquire an image of the photovoltaic cell and analyze and judge the defect parameters of the photovoltaic cell according to the image of the photovoltaic cell.

[0010] In some embodiments, in the aforementioned photovoltaic cell detection device, the first conveyor wheels and the second conveyor wheels are arranged alternately along the second direction.

[0011] In some embodiments, for the aforementioned photovoltaic cell detecting device, the axial dimension of the second conveying wheel is at least a part of the thickness of the photovoltaic cell.

[0012] In some embodiments, for the aforementioned photovoltaic cell detecting device, the supporting surface of the first conveying wheel is higher than the first surface of the air floating plate.

[0013] In some embodiments, the aforementioned photovoltaic cell detecting device further includes a transmission assembly;

[0014] The transmission assembly is connected to the first conveying wheel set and the second conveying wheel set to synchronously transmit a single driving force to the first conveying wheel set and the second conveying wheel set.

[0015] In some embodiments, for the aforementioned photovoltaic cell detecting device, the transmission assembly includes

[0016] a transmission shaft extending along a second direction and rotatably arranged about the second direction;

[0017] a first magnetic wheel set including a plurality of first magnetic wheels and a plurality of second magnetic wheels; a plurality of first magnetic wheels are sleeved on the transmission shaft corresponding to the first conveying wheels one by one to be able to rotate with the transmission shaft; a plurality of second magnetic wheels are sleeved on the wheel shafts of the first conveying wheels one by one, and the second magnetic wheels are spaced from the first magnetic wheels;

[0018] a second magnetic wheel set including a plurality of third magnetic wheels and a plurality of fourth magnetic wheels; a plurality of third magnetic wheels are sleeved on the transmission shaft corresponding to the second conveying wheels one by one to be able to rotate with the transmission shaft; a plurality of fourth magnetic wheels are sleeved on the wheel shafts of the second conveying wheels one by one, and the fourth magnetic wheels are spaced from the third magnetic wheels.

[0019] In some embodiments, for the aforementioned photovoltaic cell detecting device, the image acquisition unit includes a mounting bracket, an image acquisition device and an image processor;

[0020] One end of the mounting bracket is fixedly connected to the air floating plate, and the other end of the mounting bracket extends in a direction away from the first surface of the air floating plate to form a mounting end;

[0021] The image acquisition device is arranged at the mounting end, and the image acquisition device can acquire images along a direction perpendicular to the first surface of the air floating plate;

[0022] The image processor is signal-connected to the image acquisition device to receive the images acquired by the image acquisition device and analyze and judge the defect parameters of the photovoltaic cell according to the images;

[0023] Among them, the defect parameters at least include defect type, defect position and defect size.

[0024] In some embodiments, for the aforementioned photovoltaic cell detection device, the image acquisition device includes an industrial camera and a light source;

[0025] The light source is disposed at the lens of the industrial camera, and the light source is coaxially wound around the lens.

[0026] In some embodiments, for the aforementioned photovoltaic cell detection device, it further includes a position sensor;

[0027] The position sensor is disposed at a specified position on the air floating plate. The position sensor is signal-connected to the image acquisition unit and is used to detect and send a signal indicating that the photovoltaic cell has reached the position.

[0028] The second aspect of the present application provides a photovoltaic cell detection system, which includes at least one of the aforementioned photovoltaic cell detection devices.

[0029] Through the above technical solutions, the photovoltaic cell detection device provided by the present disclosure cooperates with the air floating plate to perform non-contact transmission of the photovoltaic cell through the first conveyor wheel set and the second conveyor wheel set. At the same time, the image acquisition unit is used to perform automatic and high-precision defect detection, realizing automated detection, which not only improves the detection efficiency but also ensures the detection accuracy. It effectively solves the problem that before the existing photovoltaic cells leave the factory, manual quality inspection is required, but the detection efficiency is low and the accuracy is not high, which affects the production efficiency of the production line and the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 is a schematic structural diagram of the photovoltaic cell detection device disclosed in the embodiments of the present disclosure;

[0032] Figure 2 is a schematic diagram of the structural cooperation between the transmission component and the first conveyor wheel set and the second conveyor wheel set in the photovoltaic cell detection device disclosed in the embodiments of the present disclosure;

[0033] Figure 3 is Figure 2 the left view of A in

[0034] Figure 4 is Figure 2 the top view of B in

[0035] Figure 5 is a structural block diagram of the photovoltaic cell detection device disclosed in the embodiments of the present disclosure.

[0036] Description of Reference Numerals

[0037] 1. Air - floating plate; 11. Air - floating holes; 2. First conveyor wheel group; 21. First conveyor wheel; 3. Second conveyor wheel group; 31. Second conveyor wheel; 4. Image acquisition unit; 41. Image acquisition device; 42. Image processor; 43. Mounting rack; 5. Photovoltaic cell; 6. Transmission assembly; 61. Transmission shaft; 62. First magnetic wheel group; 621. First magnetic wheel; 622. Second magnetic wheel; 63. Second magnetic wheel group; 631. Third magnetic wheel; 632. Fourth magnetic wheel; 7. Position sensor; 8. Controller; 9. Driving part; a. First direction; b. Second direction; c. Third direction. Detailed Embodiment

[0038] The following further describes in detail the embodiments of the present disclosure in conjunction with the drawings and examples. The detailed description and drawings of the following examples are used to exemplarily illustrate the principle of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.

[0039] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values described in these embodiments should be construed as merely exemplary, rather than as limitations.

[0040] It should be noted that in the description of the present disclosure, unless otherwise specified, "a plurality of" means greater than or equal to two; the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0041] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0042] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0043] All terms used in the present disclosure have the same meanings as understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.

[0044] In the photovoltaic industry, the battery wafers are getting thinner. At the same time, in order to adapt to the product update and iteration and industry competition, each enterprise is improving production efficiency and product quality. There are many production and processing links for battery wafers, and it is very easy to produce defects such as broken wafers, hidden cracks, notches, and scratches during the production and processing of battery wafers. These defects seriously affect the performance and stability of battery wafers. Therefore, defect detection is required before the battery wafers leave the factory. Currently, most producers use manual detection methods, performing high-intensity and rapid detection under light irradiation. The labor intensity of workers is high, and the detection efficiency and accuracy are low, seriously affecting the production efficiency of the production line and product quality.

[0045] The photovoltaic cell detection device provided in this embodiment realizes the automatic transmission of photovoltaic cells through an air floating plate in cooperation with a first conveyor wheel assembly and a second conveyor wheel assembly. At the same time, an image acquisition unit is correspondingly arranged to acquire images of the transmitted photovoltaic cells and analyze the images to determine whether there are defects such as broken wafers, hidden cracks, notches, and scratches, so as to realize the automatic detection of photovoltaic cell defects. The whole process does not require manual participation, which not only reduces the labor intensity but also improves the detection efficiency and accuracy.

[0046] Embodiment 1

[0047] Refer to the appendix Figure 1, this embodiment discloses a photovoltaic cell detection device, which includes an air floating plate 1, a first conveyor wheel group 2, a second conveyor wheel group 3, and an image acquisition unit 4. A plurality of air floating holes 11 are provided on the first surface of the air floating plate 1; the first conveyor wheel group 2 includes a plurality of first conveyor wheels 21, and the plurality of first conveyor wheels 21 are arranged at intervals along the second direction b on both sides of the air floating plate 1 along the first direction a. The first conveyor wheel 21 is rotatably arranged around the first direction a, and the first conveyor wheel 21 is used to movably support the photovoltaic cell 5; the second conveyor wheel group 3 includes a plurality of second conveyor wheels 31, and the plurality of second conveyor wheels 31 are arranged at intervals along the second direction b on both sides of the air floating plate 1 along the first direction a. The second conveyor wheel 31 is rotatably arranged around the third direction c, and the second conveyor wheel 31 is used to movably abut against the side wall of the photovoltaic cell 5; wherein, the third direction c is the thickness direction of the air floating plate 1, and both the first direction a and the second direction b are perpendicular to the third direction c; the image acquisition unit 4 is arranged at an interval from the first surface of the air floating plate 1, and the image acquisition unit 4 is used to acquire the image of the photovoltaic cell 5 and analyze and judge the defect parameters of the photovoltaic cell 5 according to the image of the photovoltaic cell.

[0048] Specifically, in order to solve the problem that existing photovoltaic cells need to be inspected manually before leaving the factory, but the inspection efficiency is low and the accuracy is not high, which affects the production efficiency of the production line and the product quality. This embodiment provides a photovoltaic cell detection device, which realizes the automatic and non-contact transmission of the photovoltaic cell 5 through the cooperation of the air floating plate 1, the first conveyor wheel group 2 and the second conveyor wheel group 3, and the image acquisition unit 5 is arranged correspondingly, so as to realize the automatic image acquisition and automatic defect analysis of the photovoltaic cell 5 on the air floating plate 1, thereby realizing automatic inspection, which not only improves the inspection efficiency but also can improve the inspection accuracy by the high precision of the image acquisition unit 5.

[0049] Wherein, the first direction a, the second direction b and the third direction c in this embodiment can be the width direction, the length direction and the thickness direction of the air floating plate 1 respectively; that both the first direction a and the second direction b are perpendicular to the third direction c can be perpendicular to each other or approximately perpendicular. In this embodiment, the first direction a and the second direction b can also be two directions parallel to the first surface of the air floating plate 1 and satisfying the perpendicular condition, and no more limitations are made here.

[0050] Among them, the air flotation plate 1 can form a stable air film by outgassing to achieve non-contact support for the object above, which can reduce the wear and pollution caused by contact or film materials; in this embodiment, the first surface of the air flotation plate 1 is the upper surface, which is provided with a plurality of air flotation holes 11 to achieve gas output, and the shape, size and distribution of the air flotation holes 11 are not limited here, and can be designed and adjusted according to actual needs to ensure that they can support the photovoltaic cell 5 after outgassing; in this embodiment, the air flotation plate 1 can be connected to a gas compressor to obtain gas supply, and the gas used in this embodiment can be but not limited to air or inert gas.

[0051] Among them, the first transmission wheel 21 can be but not limited to a rigid wheel or a wheel body with a certain elasticity. The first transmission wheel 21 is a circular wheel body, which can rotate around the first direction a, and the first transmission wheel 21 is provided on both sides of the air floating plate 1 along the first direction a, so that the first transmission wheel 21 can transmit the photovoltaic cell 5 along the first direction a during the rotation process; in this process, the air outlet of the air floating plate 1 is cooperated to further support the photovoltaic cell 5, thereby effectively reducing the contact pressure between the first transmission wheel 21 and the photovoltaic cell 5, avoiding friction and wear, so that the photovoltaic cell 5 is close to contactless transmission during the transmission process, and unnecessary damage or defects of the photovoltaic cell 5 during the detection process are avoided.

[0052] The second transmission wheel 31 may be, but is not limited to, a rigid wheel or a wheel body with a certain elasticity. The second transmission wheel 31 is a circular wheel body, which can rotate around the second direction b, and the second transmission wheels 31 are provided on both sides of the air floating plate 1 along the first direction a, so that the second transmission wheel 31 can contact the side wall of the photovoltaic cell 5 during the rotation process, which can not only cooperate with the transmission of the photovoltaic cell 5 along the first direction a, but also guide the transmission of the photovoltaic cell 5 along the first direction a, so as to avoid the photovoltaic cell 5 from being offset or shifting in the contactless transmission state between the first transmission wheel 21 and the air floating plate 1, thereby affecting the image acquisition accuracy of the subsequent image acquisition unit 4; in this embodiment, the second transmission wheel 31 can be arranged on the side of the first transmission wheel 21 away from the air floating plate 1 along the first direction a or the opposite direction of the first direction a, so that when the first transmission wheel 21 supports the bottom surface of the photovoltaic cell 5, the second transmission wheel 31 can also contact the side wall of the photovoltaic cell 5, and the first transmission wheel 21 and the second transmission wheel 31 will not interfere with each other.

[0053] Among them, the image acquisition unit 4 is an integrated device capable of image acquisition and image processing. In this embodiment, the image acquisition unit 4 may include, but is not limited to, an image acquisition device 41 and an image processor 42; the image acquisition device 41 may be, but is not limited to, a camera, a video camera, a CCD camera, etc., which can convert an optical image into an analog / digital image to lay the foundation for subsequent analysis and processing by the image processor 42; the image processor 42 is capable of performing image processing and analysis on the analog / digital image provided by the image acquisition device 41 using a convolutional neural network (CNN), including feature recognition and matching analysis to obtain defect parameters. In this embodiment, the defect parameters at least include defect type, defect location, and defect size. For example, the color feature can be recognized by using the histogram intersection method or the distance method; the relationship between pixel points in the image and their neighboring pixel points can be statistically analyzed by using methods such as gray-level co-occurrence matrix and local binary pattern to recognize texture features; the shape feature can be recognized by using the boundary feature method or the region feature method; the spatial position or relative position relationship between multiple features, including connection or adjacency relationship, overlap or overlapping relationship, etc., can be analyzed and described in cooperation with the spatial coordinate system; and then the type of the feature, that is, fragment, hidden crack, notch, scratch, etc., can be determined by comparing the recognized feature with the known feature; the above image processing process can be easily understood and implemented by those skilled in the art, and will not be elaborated here.

[0054] According to the above, the photovoltaic cell detection device provided by the present disclosure cooperates with the air floating plate 1 to perform non-contact transmission on the photovoltaic cell 5 through the first conveyor wheel group 2 and the second conveyor wheel group 3, and at the same time uses the image acquisition unit 4 to perform automatic and high-precision defect detection, realizing automated detection, which not only improves the detection efficiency but also ensures the detection accuracy. It effectively solves the problem that the existing photovoltaic cells need to be manually inspected before leaving the factory, but the detection efficiency is low and the accuracy is not high, which affects the production efficiency of the production line and the product quality.

[0055] In this article, the term "and / or" only describes the association relationship of associated objects, indicating three possible relationships that can exist. For example, A and / or B is specifically understood as: A and B can be included simultaneously, A can exist alone, or B can exist alone, and any one of the above three situations can be satisfied.

[0056] In some embodiments, referring to the attached Figure 2 , in the photovoltaic cell detection device provided in this embodiment, in a specific implementation, the first conveyor wheel 21 and the second conveyor wheel 31 are staggered along the second direction b.

[0057] It can be understood that, in order to ensure the smooth rotation and transmission of the first transmission wheel 21 and the second transmission wheel 31, in this embodiment, the first transmission wheel 21 and the second transmission wheel 31 on the same side of the air-floating plate 1 are arranged in a staggered manner along the second direction b. Furthermore, not only can the mutual interference between the two be avoided, but also a relay transmission form can be formed, that is Figure 2 As shown, after the first transmission wheel 21 on the leftmost side rotates clockwise to transmit the photovoltaic cell 5 to the right, the second transmission wheel 31 relays the transmission to transmit the photovoltaic cell 5 to the second first transmission wheel 21 on the right side. Therefore, on the premise of ensuring the transmission force and guiding effect, the number of the first transmission wheels 21 can be effectively reduced, and the setting cost can be reduced to a certain extent.

[0058] In some embodiments, for the photovoltaic cell detection device provided in this embodiment, in specific implementation, the axial dimension of the second transmission wheel 31 is at least a part of the thickness of the photovoltaic cell 5.

[0059] It can be understood that, in order to ensure the guiding effect of the second transmission wheel 31 on the photovoltaic cell 5, in this embodiment, the axial dimension of the second transmission wheel 31 is set to be at least a part of the thickness of the photovoltaic cell 5. The axial dimension of the second transmission wheel 31 refers to the dimension of its wheel surface in its axial direction. The above setting enables the wheel surface of the second transmission wheel 31 to contact at least part of the side wall of the photovoltaic cell 5 along the thickness direction of the photovoltaic cell 5, so as to play a guiding role; of course, the dimension of the axial surface of the second transmission wheel 31 in its axial direction can also be set to be greater than the dimension in the thickness direction of the photovoltaic cell 5 to ensure comprehensive contact guiding.

[0060] Furthermore, referring to the attached Figure 1 figure, for the photovoltaic cell detection device provided in this embodiment, in specific implementation, the supporting surface of the first transmission wheel 21 is higher than the first surface of the air-floating plate 1.

[0061] It can be understood that, in order to ensure the non-contact transmission of the photovoltaic cell 5 in cooperation with the first transmission wheel set 2 and the air-floating plate 1, in this embodiment, the supporting surface of the first transmission wheel 21 is set to be higher than the first surface of the air-floating plate 1, which can be but is not limited to being 0.2 - 0.3 mm higher. Furthermore, the edge of the photovoltaic cell 5 can be lapped on the first transmission wheel 21, and the middle part does not contact the first surface of the air-floating plate 1 but is kept suspended by the action of the air-floating plate 1, thereby reducing the contact pressure of the first transmission wheel 21.

[0062] Furthermore, referring to the attached Figure 2 figure, for the photovoltaic cell detection device provided in this embodiment, in specific implementation, it further includes a transmission assembly 6; the transmission assembly 6 is connected to the first transmission wheel set 2 and the second transmission wheel set 3 to be able to synchronously transmit the only driving force to the first transmission wheel set 2 and the second transmission wheel set 3.

[0063] It can be understood that, in order to achieve efficient transmission, a transmission component 6 is provided in this embodiment. It can transmit the driving force to the first transmission wheel set 2 and the second transmission wheel set 3 simultaneously, realizing synchronous driving, and ensuring efficient driving and transmission. The transmission component 6 can be a structure with the cooperation of a gear and a rack, or a structure with the cooperation of a belt and a driving wheel, or a structure with the cooperation of a rotating shaft and a magnetic wheel. The transmission component is connected to the output shaft of the driving motor to transmit the driving force to the first transmission wheel set 2 and the second transmission wheel set 3, realizing synchronous driving, and avoiding the actions of the first transmission wheel set 2 and the second transmission wheel set 3 not necessarily affecting the transmission of the photovoltaic cell 5.

[0064] In some embodiments, referring to the appended Figure 2 , appended Figure 3 and appended Figure 4 , the photovoltaic cell detection device provided in this embodiment, in specific implementation, the transmission component 6 includes a transmission shaft 61, a first magnetic wheel set 62 and a second magnetic wheel set 63. The transmission shaft 61 extends along the second direction b and is rotatably arranged around the second direction b. The first magnetic wheel set 62 includes a plurality of first magnetic wheels 621 and a plurality of second magnetic wheels 622. A plurality of first magnetic wheels 621 are sleeved on the transmission shaft 61 corresponding to the first transmission wheels 21 one by one, so as to be able to rotate with the transmission shaft 61. A plurality of second magnetic wheels 622 are sleeved on the axles of the first transmission wheels 21 one by one, and the second magnetic wheels 622 are spaced from the first magnetic wheels 621.

[0065] The second magnetic wheel set 63 includes a plurality of third magnetic wheels 631 and a plurality of fourth magnetic wheels 632. A plurality of third magnetic wheels 631 are sleeved on the transmission shaft 61 corresponding to the second transmission wheels 31 one by one, so as to be able to rotate with the transmission shaft 61. A plurality of fourth magnetic wheels 632 are sleeved on the axles of the second transmission wheels 31 one by one, and the fourth magnetic wheels 632 are spaced from the third magnetic wheels 631.

[0066] It can be understood that, in order to reduce the overall operating cost of the device, in this embodiment, the transmission component 6 is arranged to synchronously drive the first transmission wheel set 2 and the second transmission wheel set 3 through the transmission shaft 61 in cooperation with the first magnetic wheel set 62 and the second magnetic wheel set 3. The magnetic wheel can convert the repulsive force into a driving force through the mutual attraction and repulsion between magnetic poles to achieve non-contact force transmission; the magnetic wheel generates less noise during operation, which can optimize the working environment, and the magnetic wheel is a non-contact force transmission, without mechanical wear, the service life of the equipment is extended, and there is no need to frequently replace worn parts, further reducing the operating cost. In this embodiment, the first magnetic wheel set 62 is arranged corresponding to the first transmission wheel 21, and the second magnetic wheel set 63 is arranged corresponding to the second transmission wheel 31. When the first magnetic wheel 621 rotates around the second direction b along with the transmission shaft 61, it can generate a repulsive force to push the second magnetic wheel 622 to rotate around the first direction a, thereby driving the first transmission wheel 21 to rotate around the first direction a. When the third magnetic wheel 631 rotates around the second direction b along with the transmission shaft 61, it can generate a repulsive force to push the fourth magnetic wheel 632 to rotate around the third direction c; it can be understood that in this embodiment, the axles of the first transmission wheel 21 and the second transmission wheel 31 are both parts that penetrate their wheel surfaces along the axial direction of the transmission wheels, so as to be able to cooperate with the magnetic wheels without affecting the rotation of the wheel bodies.

[0067] In some embodiments, referring to the attached Figure 1 , the photovoltaic cell detection device provided in this embodiment, in a specific implementation, the image acquisition unit 4 further includes a mounting frame 43; one end of the mounting frame 43 is fixedly connected to the air-floating plate 1, and the other end of the mounting frame 43 extends in a direction away from the first surface of the air-floating plate 1 to form a mounting end; the image acquisition device 41 is arranged at the mounting end, and the image acquisition device 41 can acquire images along a direction perpendicular to the first surface of the air-floating plate 1; the image processor 42 is signal-connected to the image acquisition device 41 to receive the images acquired by the image acquisition device 41 and analyze and judge the defect parameters of the photovoltaic cell 5 according to the images.

[0068] It can be understood that, in order to achieve the spaced arrangement between the image acquisition unit 4 and the first surface of the air-floating plate 1, the mounting frame 43 is provided in this embodiment. The mounting frame 43 is a rigid frame structure, which can be but is not limited to an L-shaped frame or a U-shaped frame. For example: referring to the attached Figure 1As shown, the mounting bracket 43 is a U-shaped bracket, whose opening faces the air floating plate 1 and is connected to the side of the air floating plate 1, so that the sealing end is spaced from the first surface above the first surface. The mounting end is any position on the sealing end. The image acquisition unit 4 can be mounted on the mounting bracket 43 by means of screwing, clamping, bonding, etc. In this embodiment, to ensure the accuracy of image acquisition, when the image acquisition unit 4 is mounted, it is kept in a state perpendicular to the first surface of the air floating plate 1. It can, but is not limited to, that the viewing range just covers the size of the air floating plate 1 in the first direction a, thereby ensuring the accuracy of image acquisition and avoiding affecting the accuracy of subsequent image processing due to the structure of other devices or light.

[0069] In some embodiments, for the photovoltaic cell detection device provided in this embodiment, in specific implementation, the image acquisition device 41 includes an industrial camera and a light source; the light source is arranged at the lens of the industrial camera, and the light source is coaxially wound around the lens.

[0070] It can be understood that, to ensure the accuracy of image acquisition, a light source is set in this embodiment. The type of the light source can be designed and adjusted according to actual needs or the actual environment of the production line. It can, but is not limited to, a white light source; in this embodiment, the light source is coaxially wound around the lens, so that the light emitted by the light source can be perpendicular to the first surface of the air floating plate 1, and there will be no light in other directions, and thus the image acquisition of the lens will not be affected, and the accuracy of subsequent image processing results will not be affected by shadows.

[0071] In some embodiments, for the photovoltaic cell detection device provided in this embodiment, in specific implementation, it further includes a position sensor 7; the position sensor 7 is arranged at a specified position on the air floating plate 1, and the position sensor 7 is in signal connection with the image acquisition unit 4, and is used for detecting and sending the in-place signal of the photovoltaic cell 5.

[0072] It can be understood that, to achieve an energy-saving production line, a position sensor 7 is set in this embodiment. It can, but is not limited to, an infrared sensor, a distance sensor, etc. It is arranged in the opposite direction of the second direction b of the image acquisition unit 4 on the air floating plate 1 to detect the photovoltaic cell 5 that is about to enter the acquisition range of the image acquisition unit 4. At this time, the in-place signal is sent to the image acquisition unit 4 to wake it up, then the image acquisition unit 4 does not have to be in a working state all the time, so as to reduce energy consumption. Of course, refer to the appendix Figure 5, in this embodiment, a controller 8 can also be provided. The controller 8 can perform data transceiver, analysis and processing, and program editing. The controller 8 is electrically connected to the position sensor 7, the image acquisition unit 4, and even the driving part 9 of the transmission component 6. Then, the in-place signal of the position sensor 7 can be sent to the controller 8, and the controller 8 starts the image acquisition unit 4 according to this in-place signal. The control cooperation between the controller and the driving part 9 can be easily understood by those skilled in the art and will not be elaborated here; the above design can achieve efficient automatic control.

[0073] Embodiment 2

[0074] This embodiment provides a photovoltaic cell detection system, which includes at least one photovoltaic cell detection device.

[0075] Specifically, the photovoltaic cell detection device is the photovoltaic cell detection device in Embodiment 1. For its structure and working principle, please refer to the detailed description in Embodiment 1 and will not be elaborated here.

[0076] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0077] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A photovoltaic cell detection device, characterized in that It includes: An air floating plate (1), on the first surface of the air floating plate (1), there are a number of air floating holes (11); A first conveyor wheel group (2), the first conveyor wheel group (2) includes a number of first conveyor wheels (21), and a number of the first conveyor wheels (21) are arranged at intervals along the second direction (b) on both sides of the air floating plate (1) along the first direction (a), the first conveyor wheel (21) is rotatably arranged around the first direction (a), and the first conveyor wheel (21) is used for movably supporting a photovoltaic cell (5); A second conveyor wheel group (3), the second conveyor wheel group (3) includes a number of second conveyor wheels (31), and a number of the second conveyor wheels (31) are arranged at intervals along the second direction (b) on both sides of the air floating plate (1) along the first direction (a), the second conveyor wheel (31) is rotatably arranged around the third direction (c), and the second conveyor wheel (31) is used for movably abutting against the side wall of the photovoltaic cell (5); wherein, the third direction (c) is the thickness direction of the air floating plate (1), and both the first direction (a) and the second direction (b) are perpendicular to the third direction (c); An image acquisition unit (4), the image acquisition unit (4) is arranged at an interval from the first surface of the air floating plate (1), and the image acquisition unit (4) is used for acquiring an image of the photovoltaic cell (5) and analyzing and judging the defect parameters of the photovoltaic cell (5) according to the image of the photovoltaic cell (5).

2. The photovoltaic cell detection device according to claim 1, characterized in that: The first conveyor wheels (21) and the second conveyor wheels (31) are arranged staggeredly along the second direction (b).

3. The photovoltaic cell detection device according to claim 1, characterized in that: The axial dimension of the second conveyor wheel (31) is at least a part of the thickness of the photovoltaic cell (5).

4. The photovoltaic cell detection device according to claim 1, characterized in that: The supporting surface of the first conveyor wheel (21) is higher than the first surface of the air floating plate (1).

5. The photovoltaic cell detection device according to claim 1, characterized in that: It further includes a transmission component (6); The transmission component (6) is connected to the first conveyor wheel group (2) and the second conveyor wheel group (3) so as to be able to synchronously transmit a single driving force to the first conveyor wheel group (2) and the second conveyor wheel group (3).

6. The photovoltaic cell detection device according to claim 5, characterized in that: The transmission component (6) includes A transmission shaft (61), the transmission shaft (61) extends along the second direction (b) and is rotatably arranged around the second direction (b); The first magnetic wheel set (62), the first magnetic wheel set (62) includes a plurality of first magnetic wheels (621) and a plurality of second magnetic wheels (622); a plurality of the first magnetic wheels (621) and the first transmission wheel (21) are sleeved on the transmission shaft (61) in a one-to-one correspondence so as to be able to rotate with the transmission shaft (61); a plurality of the second magnetic wheels (622) are sleeved on the axle of the first transmission wheel (21) in a one-to-one correspondence, and the second magnetic wheels (622) are spaced apart from the first magnetic wheels (621). The second magnetic wheel set (63), the second magnetic wheel set (63) includes a plurality of third magnetic wheels (631) and a plurality of fourth magnetic wheels (632); a plurality of the third magnetic wheels (631) and the second transmission wheel (31) are sleeved on the transmission shaft (61) in a one-to-one correspondence so as to be able to rotate with the transmission shaft (61); a plurality of the fourth magnetic wheels (632) are sleeved on the axle of the second transmission wheel (31) in a one-to-one correspondence, and the fourth magnetic wheels (632) are spaced apart from the third magnetic wheels (631).

7. The photovoltaic cell detection device according to claim 1, wherein: The image acquisition unit (4) includes a mounting bracket (43), an image acquisition device (41) and an image processor (42); One end of the mounting bracket (43) is fixedly connected to the air floating plate (1), and the other end of the mounting bracket (43) extends away from the first surface of the air floating plate (1) to form a mounting end; The image acquisition device (41) is arranged at the mounting end, and the image acquisition device (41) can acquire images along a direction perpendicular to the first surface of the air floating plate (1); The image processor (42) is signal-connected to the image acquisition device (41) to receive the images acquired by the image acquisition device (41) and analyze and judge the defect parameters of the photovoltaic cell (5) according to the images; Wherein, the defect parameters at least include defect type, defect position and defect size.

8. The photovoltaic cell detection device according to claim 7, wherein: The image acquisition device (41) includes an industrial camera and a light source; The light source is arranged at the lens of the industrial camera, and the light source is coaxially wound around the lens.

9. The photovoltaic cell detection device according to claim 1, wherein: It further includes a position sensor (7); The position sensor (7) is arranged at a specified position on the air floating plate (1), and the position sensor (7) is signal-connected to the image acquisition unit (4) for detecting and sending the in-place signal of the photovoltaic cell (5).

10. A photovoltaic cell detection system, characterized in that, It includes: At least one photovoltaic cell detection device according to any one of claims 1-9.

Images