Photovoltaic sheet adhesion detection device

Abstract

The utility model provides an adhesion detection device for photovoltaic sheets, which can perform adhesion detection on battery pieces in a feeding process, and comprises a suction cup device, a feeding device, a detection device and a control device, and is characterized in that the suction cup device can grab the photovoltaic sheets; the infrared emitter can emit infrared light, the infrared photoelectric sensor converts the received infrared light into a first detection signal, and the first detection signal can be used for judging whether the whole photovoltaic sheet is adhered or not; the correlation photoelectric sensor transmitting end and the correlation photoelectric sensor receiving end are respectively parallel to the photovoltaic sheet, when local adhesion of the photovoltaic sheet occurs, the detection light is shielded by the adhered photovoltaic sheet, the correlation photoelectric sensor transmits a second detection signal according to the change of the received light, and the correlation photoelectric sensor receives the second detection signal; the second detection signal can be used for judging whether local adhesion of the photovoltaic sheet occurs or not.

Description

Technical Field

[0001] This utility model relates to the technical field of photovoltaic sheet production and testing equipment, specifically to a photovoltaic sheet adhesion testing device. Background Technology

[0002] Currently, the photovoltaic industry is increasingly demanding higher requirements for the breakage rate of automated equipment. Among the reasons for breakage is the generation of single and double sheets during the feeding process. Since photovoltaic sheets, including solar cells and silicon wafers, are usually stacked, the sheets are prone to sticking together during the feeding process. Two photovoltaic solar cells may stick together completely or partially. When the solar cells are lifted to a certain height during the feeding process, the lower solar cell that is stuck together in a double sheet will fall due to gravity, resulting in a high breakage rate.

[0003] Current detection methods typically use ultrasonic and laser displacement sensors to detect the thickness of single or double sheets by measuring the distance of the beam. However, because the sheets being detected are relatively thin, the detection resolution is required to be high, resulting in higher application costs. Additionally, the detection distance is relatively short, and the accuracy of the mechanical installation position is required to be high. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a photovoltaic sheet adhesion detection device that can detect adhesion of solar cells during the feeding process, reducing the high breakage rate caused by adhered double solar cells, preventing adhered double solar cells from flowing into the production line, and with low installation accuracy requirements and application costs.

[0005] The technical solution is as follows: a photovoltaic sheet adhesion detection device, comprising:

[0006] A handling mechanism, the handling mechanism including a suction cup device, the suction cup device being capable of gripping photovoltaic sheets;

[0007] Also includes:

[0008] An infrared emitter and an infrared photoelectric sensor are provided. The infrared emitter emits infrared light, which is received by the infrared photoelectric sensor after passing through the grasped photovoltaic sheet. The infrared photoelectric sensor converts the received infrared light into a first detection signal, which can be used to determine whether the photovoltaic sheet has become stuck together.

[0009] The photovoltaic sensor has a transmitter and a receiver, which are respectively arranged parallel to the photovoltaic sheet. When the photovoltaic sheet becomes partially stuck, the detection light emitted by the transmitter is blocked by the stuck photovoltaic sheet. The transmitter then emits a second detection signal based on the change in the received light. This second detection signal can be used to determine whether the photovoltaic sheet has become partially stuck.

[0010] Furthermore, one of the infrared emitter and the infrared photoelectric sensor is located at the upper end of the photovoltaic sheet being grasped, and the other is located at the lower end of the photovoltaic sheet being grasped, so that the infrared light emitted by the infrared emitter can be received by the infrared photoelectric sensor after passing through the photovoltaic sheet.

[0011] Furthermore, the infrared emitter includes a power drive module and an infrared light source body. A heat dissipation module is provided on the outside of the infrared light source body, and an optical collimation module is also provided at the light emitting end of the infrared light source body for focusing the emitted infrared light.

[0012] Furthermore, the photovoltaic sheet is provided with multiple pairs of through-beam photoelectric sensor transmitters and through-beam photoelectric sensor receivers.

[0013] Furthermore, it also includes a material box containing stacked photovoltaic sheets.

[0014] Furthermore, the conveying mechanism also includes a displacement device, which can drive the suction cup device to rise and fall and to move in a plane.

[0015] Furthermore, an infrared emitter is fixed on the conveying mechanism, and an infrared photoelectric sensor is correspondingly provided on the material box. The infrared emitter and the infrared photoelectric sensor are tilted. The conveying mechanism can drive the infrared emitter to move and cooperate with multiple infrared photoelectric sensors. The infrared light emitted by the infrared emitter can pass through the photovoltaic sheet grasped by the suction cup device and be received by the infrared photoelectric sensor.

[0016] Furthermore, the suction cup device is also provided with an avoidance notch, which allows the infrared light emitted by the infrared emitter to bypass the suction cup device and illuminate the photovoltaic sheet being gripped.

[0017] Furthermore, the material box also includes an outer frame, which surrounds the outer periphery of the photovoltaic sheet on the material box. A supporting column is provided at the lower end of the outer frame, and a pair of oppositely arranged photoelectric sensor transmitters and receivers are respectively provided on each pair of frame sides of the outer frame.

[0018] Furthermore, it also includes a detection unit, which receives a first detection signal and a second detection signal, and determines whether the photovoltaic sheet has adhered based on the received first detection signal and second detection signal.

[0019] This utility model discloses a photovoltaic sheet adhesion detection device. By detecting the solar cells during the suction cup material handling process, it can effectively identify adhered double photovoltaic sheets, preventing them from falling off during handling and reducing the breakage rate. Using an infrared emitter and an infrared photoelectric sensor, it can detect adhered double photovoltaic sheets even when they are completely adhered. Its detection distance is long and its angle requirements are low, significantly reducing the need for precise installation at the detection station and making it more adaptable to different scenarios. The arrangement of the through-beam photoelectric sensor's transmitter and receiver can accurately detect even the smallest local adhesions between solar cells. When local adhesion occurs, the detection light emitted by the through-beam photoelectric sensor is blocked by the adhered solar cells. The sensor can determine the presence of local adhesion based on the change in the received light signal. When the through-beam photoelectric sensor is used in combination with the infrared emitter and infrared photoelectric sensor, it can detect various adhesion scenarios, including local and whole-sheet adhesions, achieving more comprehensive and accurate adhesion detection and improving detection accuracy. Attached Figure Description

[0020] Figure 1 A schematic diagram illustrating the detection principle using an infrared emitter and an infrared photoelectric sensor in the embodiment;

[0021] Figure 2 A schematic diagram showing the irradiation of a single photovoltaic sheet with infrared light of the same energy is displayed;

[0022] Figure 3 A schematic diagram showing two photovoltaic sheets irradiated with infrared light of the same energy is presented.

[0023] Figure 4 A schematic diagram illustrating the principle of detection using a photoelectric sensor in this embodiment;

[0024] Figure 5 This is a schematic diagram of an adhesion detection device for photovoltaic sheets in one of the embodiments;

[0025] Figure 6 This is a perspective view of a portion of the structure of a photovoltaic sheet adhesion detection device in the embodiment;

[0026] Figure 7 This is a front view of a partial structure of a photovoltaic sheet adhesion detection device according to an embodiment;

[0027] Figure 8 This is a schematic diagram of another photovoltaic sheet adhesion detection device in the embodiment. Detailed Implementation

[0028] See Figure 1 2. The present invention provides a photovoltaic sheet adhesion detection device, comprising:

[0029] The handling mechanism includes a suction cup device 1, which is capable of gripping photovoltaic sheets.

[0030] Infrared emitter 2 and infrared photoelectric sensor 3. Infrared emitter 2 can emit infrared light. After the infrared light passes through the grasped photovoltaic sheet 6, it can be received by infrared photoelectric sensor 3. Infrared photoelectric sensor 3 converts the received infrared light into a first detection signal. The first detection signal can be used to determine whether the photovoltaic sheet 6 has been stuck together as a whole.

[0031] The photoelectric sensor transmitter 4 and the photoelectric sensor receiver 5 are respectively arranged parallel to the photovoltaic sheet 6. When the photovoltaic sheet is partially adhered, the detection light emitted by the photoelectric sensor transmitter 4 is blocked by the adhered photovoltaic sheet 6. The photoelectric sensor 5 emits a second detection signal according to the change in the received light. The second detection signal can be used to determine whether the photovoltaic sheet has partially adhered.

[0032] like Figure 1 As shown, one of the infrared emitter 2 and the infrared photoelectric sensor 3 is located at the upper end of the photovoltaic sheet being grasped, and the other is located at the lower end of the photovoltaic sheet being grasped, so that the infrared light emitted by the infrared emitter 2 can be received by the infrared photoelectric sensor 3 after passing through the photovoltaic sheet. The infrared emitter 2 emits infrared light with a certain laser power. Due to the penetrating ability of infrared light, it is captured by the infrared receiver 3. The infrared receiver 3 distinguishes between a single photovoltaic sheet and two adhered photovoltaic sheets based on the energy of the captured infrared light. If the energy is less than a certain threshold, it is judged as an adhered sheet, and a first detection signal is output. The first detection signal can be judged manually or by a computer or other industrial control computer. Figure 2 , Figure 3 The diagrams show how single and double photovoltaic sheets are irradiated with infrared light of the same energy. Different thicknesses of the solar cells produce different degrees of scattering, resulting in different infrared light transmittance. An infrared sensor is placed at the other end to capture the transmitted infrared light and convert it into an electrical signal. The photoelectric sensor distinguishes between single and double photovoltaic sheets by judging the strength of the current. The photovoltaic sheet can be either a photovoltaic cell or a silicon wafer.

[0033] Commercially available ultrasonic distance sensors and laser displacement sensors typically have a detection distance of less than 20cm when measuring a thickness difference of 100µm. This embodiment employs an infrared emitter and an infrared photoelectric sensor. The infrared emitter can be a solid-state laser, semiconductor laser, fiber laser, LED, or liquid laser. The infrared photoelectric sensor can be various photoresistors, photoelectric sensors, or infrared image sensors. Using an infrared emitter and infrared photoelectric sensor increases the maximum detection distance for single and double cells to 60cm, achieving a longer detection range. Furthermore, the angle between the infrared receiver and emitter can be expanded to ±15°, achieving a detection rate of up to 99.9% for single and double cells. This reduces the accuracy requirements for the installation position at the detection station and improves adaptability to different scenarios requiring this detection.

[0034] Figure 2 This demonstrates a situation where two silicon wafers partially adhere to each other. For this situation, such as... Figure 4 As shown, a visible light ray can be emitted from the emitter 4 of a through-beam photoelectric sensor, and the receiver 5 of the through-beam photoelectric sensor receives the light signal emitted from the emitter 4. If there is an obstruction in the middle, no light signal will be received, indicating that the group of solar cells is partially adhered, and a second detection signal will be output. The second detection signal can also be judged manually or by a computer or other industrial control computer. In addition, although the suction cup device may also cause obstruction, false detections can be avoided by simply activating the emitter 4 and receiver 5 of the photoelectric sensor periodically, or the emitter 4 and receiver 5 of the through-beam photoelectric sensor can be directly set away from the suction cup device 1.

[0035] In this embodiment, the combination of infrared transmitter 2 and infrared photoelectric sensor 3, as well as through-beam photoelectric sensor transmitter 4 and through-beam photoelectric sensor receiver 5, can be applied to the detection of photovoltaic sheets after they are lifted during the feeding process. Unlike the detection on the production line, it can intercept the adhered photovoltaic sheets before they enter the production line of the equipment, which greatly reduces the design difficulty of the subsequent equipment.

[0036] In one embodiment of this utility model, the infrared emitter includes a power drive module and an infrared light source body. A heat dissipation module is disposed on the outside of the infrared light source body, and an optical collimation module is also disposed at the light emitting end of the infrared light source body for focusing the emitted infrared light. The optical collimation module can reduce the divergence angle of the light source, increase the detection range, improve the irradiance per unit area, and increase the light energy utilization efficiency.

[0037] In one embodiment of this utility model, for rectangular photovoltaic sheets, a pair of through-beam photoelectric sensor transmitters 4 and through-beam photoelectric sensor receivers 5 are respectively provided at each pair of opposite sides of the photovoltaic sheet 6 to ensure that local adhesion can be detected on both sides of the photovoltaic sheet 6; for photovoltaic sheets of other shapes, multiple pairs of through-beam photoelectric sensor transmitters 4 and through-beam photoelectric sensor receivers 5 can be provided at intervals to detect local adhesion.

[0038] See Figure 5 6, 7. In one embodiment of the present invention, the photovoltaic sheet adhesion detection device further includes a material box 7, in which stacked photovoltaic sheets 8 are disposed. The conveying mechanism further includes a displacement device, which can drive the suction cup device 1 to rise and fall and to move in a plane.

[0039] In this embodiment, an infrared emitter 2 is fixed on the conveying mechanism, and an infrared photoelectric sensor 3 is correspondingly provided on the material box. The infrared emitter 2 and the infrared photoelectric sensor 3 are tilted. The displacement device can drive the infrared emitter 2 to move and cooperate with multiple infrared photoelectric sensors 3. The infrared light emitted by the infrared emitter 2 can pass through the photovoltaic sheet grasped by the suction cup device 1 and be received by the infrared photoelectric sensor 3. The suction cup device 1 is also provided with an avoidance notch 8, which allows the infrared light emitted by the infrared emitter 2 to avoid the suction cup device 1 and irradiate the grasped photovoltaic sheet 6. In other embodiments, the infrared emitter 2 can also be fixed on the material box, and the infrared photoelectric sensor 3 can be fixed on the conveying mechanism.

[0040] like Figure 8 As shown in the embodiment, when inspecting multiple photovoltaic sheets, the infrared penetration detection method differs from the traditional ultrasonic and laser rangefinder detection methods, thus reducing the alignment requirements. Therefore, the number of infrared transmitters 2 can be reduced. The number of infrared transmitters 2 can be less than the number of infrared photoelectric sensors 3 on the material box. The number of infrared photoelectric sensors 3 corresponds to the material box setting. It is only necessary to set a conveying mechanism that can move the infrared transmitters 2 to the other side of the material box to cooperate with the infrared photoelectric sensors 3. Since the infrared penetration detection method does not have high requirements for the accuracy of mechanical installation position, the installation and debugging costs can also be reduced. By sharing the infrared transmitters 2, the application cost can be reduced. In this embodiment, multiple sets of photovoltaic sheets can be inspected simultaneously, improving the inspection efficiency.

[0041] In this embodiment, the material box 7 also includes an outer frame 9, which surrounds the outer periphery of the photovoltaic sheet 6 on the material box 7. A support column 10 is provided at the lower end of the outer frame 9. Each pair of frames 9 on the outer frame 9 is provided with a pair of oppositely arranged photoelectric sensor transmitters 4 and photoelectric sensor receivers 5, so as to ensure that local adhesion can be detected on both sides of the photovoltaic sheet 6.

[0042] In one embodiment of the present invention, the photovoltaic sheet adhesion detection device further includes a detection unit, which receives a first detection signal and a second detection signal, and determines whether the photovoltaic sheet has adhered based on the received first detection signal and second detection signal.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting adhesion of photovoltaic sheets, comprising: The conveying mechanism includes a suction cup device (1) capable of gripping photovoltaic sheet (6); Its characteristic is that it further includes: An infrared emitter (2) and an infrared photoelectric sensor (3) are provided. The infrared emitter (2) can emit infrared light. The infrared light can be received by the infrared photoelectric sensor (3) after passing through the photovoltaic sheet (6) being grasped. The infrared photoelectric sensor (3) converts the received infrared light into a first detection signal. The first detection signal can be used to determine whether the photovoltaic sheet (6) has become stuck together. The photoelectric sensor emitter (4) and the photoelectric sensor receiver (5) are respectively arranged parallel to the photovoltaic sheet (6). When the photovoltaic sheet (6) is partially stuck together, the detection light emitted by the photoelectric sensor emitter (4) is blocked by the stuck photovoltaic sheet (6). The photoelectric sensor emits a second detection signal according to the change of the received light. The second detection signal can be used to determine whether the photovoltaic sheet (6) is partially stuck together.

2. The adhesion detection device for photovoltaic sheets according to claim 1, characterized in that: One of the infrared emitter (2) and the infrared photoelectric sensor (3) is located at the upper end of the photovoltaic sheet (6) being grasped, and the other is located at the lower end of the photovoltaic sheet (6) being grasped, so that the infrared light emitted by the infrared emitter (2) can be received by the infrared photoelectric sensor (3) after passing through the photovoltaic sheet (6).

3. The adhesion detection device for photovoltaic sheets according to claim 1, characterized in that: The infrared emitter (2) includes a power drive module and an infrared light source body. A heat dissipation module is provided on the outside of the infrared light source body. An optical collimation module is also provided at the light emission end of the infrared light source body to gather the emitted infrared light.

4. The adhesion detection device for photovoltaic sheets according to claim 1, characterized in that: The photovoltaic sheet (6) is provided with multiple pairs of through-beam photoelectric sensor transmitters (4) and through-beam photoelectric sensor receivers (5).

5. The adhesion detection device for photovoltaic sheets according to claim 2, characterized in that: It also includes a material box (7) in which stacked photovoltaic sheets (6) are disposed.

6. The adhesion detection device for photovoltaic sheets according to claim 1, characterized in that: The transport mechanism also includes a displacement device that can drive the suction cup device (1) to rise and fall and to move in a plane.

7. The adhesion detection device for photovoltaic sheets according to claim 5, characterized in that: An infrared transmitter (2) is fixed on the conveying mechanism, and an infrared photoelectric sensor (3) is correspondingly provided on the material box (7). The infrared transmitter (2) and the infrared photoelectric sensor (3) are inclined. The conveying mechanism can drive the infrared transmitter (2) to move and cooperate with multiple infrared photoelectric sensors (3). The detection light emitted by the infrared transmitter (2) can pass through the photovoltaic sheet (6) grabbed by the suction cup device (1) and be received by the infrared photoelectric sensor (3).

8. The adhesion detection device for photovoltaic sheets according to claim 7, characterized in that: The suction cup device (1) is also provided with an avoidance notch (8), which allows the detection light emitted by the infrared emitter (2) to bypass the suction cup device (1) and irradiate the photovoltaic sheet (6) being gripped.

9. The adhesion detection device for photovoltaic sheets according to claim 5, characterized in that: The material box (7) also includes an outer frame (9), which surrounds the outer periphery of the photovoltaic sheet (6) on the material box (7). A support column (10) is provided at the lower end of the outer frame (9). A pair of oppositely arranged photoelectric sensor transmitters (4) and photoelectric sensor receivers (5) are respectively provided on each pair of frame sides on the outer frame (9).

10. The adhesion detection device for photovoltaic sheets according to claim 1, characterized in that: It also includes a detection unit, which receives a first detection signal and a second detection signal, and determines whether the photovoltaic sheet (6) has become stuck based on the received first detection signal and second detection signal.

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