Automatic sorting device and method for single crystal edge skins

Abstract

The invention provides an automatic sorting device and method.The sorting device comprises a to-be-sorted station, a mark recognition station, a sorted station and a sorting mechanism, the to-be-sorted station is used for containing to-be-sorted single crystal edge pieces, the mark recognition station is used for recognizing classification marks on the single crystal edge pieces, the sorted station is used for sorting the to-be-sorted single crystal edge pieces, and the sorting mechanism is used for sorting the to-be-sorted single crystal edge pieces; the to-be-sorted station, the mark identification station and the sorted station are arranged in sequence, the sorted station corresponds to the classification mark and is used for placing the sorted single crystal flaw pieces in a classified mode, and the sorting mechanism is used for moving the single crystal flaw pieces among the to-be-sorted station, the mark identification station and the sorted station. The automatic sorting and conveying device has the beneficial effects that manual work is replaced, automatic sorting and conveying of single crystal edge skins are achieved, the sorting accuracy is guaranteed, the working efficiency is improved, the labor cost is reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] The invention belongs to the field of photovoltaic technology, and in particular relates to a single crystal edge skin automatic sorting device and method. Background Art

[0002] As the length of a single crystal increases during its growth, its electrical parameters decay. There is a clear difference in electrical parameters between the head and tail of the whole single crystal. After the truncation process, the single crystal is divided into multiple sections with different electrical parameters, and is graded and classified according to minority carrier lifetime and carbon content. The edge skins produced after the single crystal is squared are uniformly recovered into a fixed pallet box and transported to the sorting and return area by an AGV trolley. Manual measurement and sorting are performed using a convenient detector, which is prone to sorting errors, low work efficiency and safety hazards. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a single crystal edge skin automatic sorting device and method, which effectively solves the technical problems of manual sorting of single crystal edge skins prone to sorting errors, low work efficiency and safety hazards, and overcomes the shortcomings of the prior art.

[0004] The technical solution adopted by the present invention is: a single crystal edge skin automatic sorting device, characterized by comprising:

[0005] The sorting station is used to place the single crystal edge skins to be sorted;

[0006] A marking and identification station is used to identify the classification mark on the edge skin of the single crystal;

[0007] A sorted workstation, corresponding to the classification identification setting, is used to classify and place the sorted single crystal edge skins;

[0008] The sorting mechanism is used to move the single crystal edge skin between the to-be-sorted station, the mark identification station and the sorted station.

[0009] Optionally, it also includes a transportation mechanism for transporting the single crystal edge skin to be sorted to the to-be-sorted station or transporting the single crystal edge skin that has been sorted away from the sorted station.

[0010] Optionally, the to-be-sorted station, the mark recognition station and the sorted station are arranged side by side, and transportation channels are provided on both sides of the sorting station, the mark recognition station and the sorted station, and the transportation mechanism performs transportation on the transportation channels.

[0011] Optionally, a buffer area is provided at the end of the transport channel.

[0012] Optionally, a first visual detection device is provided at the sorting station for detecting the placement position and angle of the single crystal edge skin.

[0013] Optionally, a driving device is provided on the first visual inspection device, and the driving device can drive the first visual inspection device to move horizontally along the to-be-sorted station.

[0014] Optionally, a proximity switch is provided on the station to be sorted, for detecting whether the single crystal edge skin is placed on the station to be sorted.

[0015] Optionally, a second visual detection device is provided at both ends of the mark recognition station for identifying the classification mark.

[0016] Optionally, a material box is provided at the sorted workstation, and the material box is arranged corresponding to the classification mark and is used for placing the sorted single crystal edge skins.

[0017] The present invention also provides a method for automatically sorting single crystal edge skins, using the single crystal edge skin automatic sorting device as described above, the steps comprising:

[0018] Marking the classification mark on the edge of the single crystal;

[0019] Placing the single crystal edge skin to be sorted on the to-be-sorted station;

[0020] The sorting mechanism moves the single crystal edge skin to be sorted to the mark identification station to identify the classification mark;

[0021] The sorting mechanism moves the single crystal edge skin to the sorted station corresponding to the classification mark.

[0022] The advantages and positive effects of the present invention are: due to the adoption of the above technical solution, the automatic sorting and transportation of single crystal edge skins are realized instead of manual work, the accuracy of sorting is guaranteed, the work efficiency is improved, the labor cost is reduced, and the safety hazards are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the overall structure of a single crystal edge skin automatic sorting device according to an embodiment of the present invention.

[0024] In the figure:

[0025] 1. To-be-sorted station 2. Marking and identification station 3. Sorted station

[0026] 4. Sorting mechanism 5. Transport mechanism 6. Transport channel

[0027] 7. Ground rail 8. Entrance 9. Exit

[0028] 10. Buffer area 11. First visual inspection device 12. Cylinder

[0029] 13. Proximity switch 14. Second visual detection device 15. Sorting table

[0030] 16. Material box DETAILED DESCRIPTION

[0031] The embodiment of the present invention provides a single crystal edge skin automatic sorting device and method, and the embodiment of the present invention is described below with reference to the accompanying drawings.

[0032] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0033] like Figure 1 As shown, an automatic sorting device for single crystal edge skins according to an embodiment of the present invention includes a station to be sorted 1, a mark identification station 2, a sorted station 3, and a sorting mechanism 4. The station to be sorted 1 is used to place the single crystal edge skins to be sorted, the mark identification station 2 is used to identify the classification mark on the single crystal edge skins, the sorted station 3 is set corresponding to the classification mark, and is used to classify and place the sorted single crystal edge skins, and the sorting mechanism 4 is used to move the single crystal edge skins between the station to be sorted 1, the mark identification station 2 and the sorted station 3. Preferably, it also includes a transport mechanism 5, which is used to transport the single crystal edge skins to be sorted to the station to be sorted 1 or to transport the single crystal edge skins that have been sorted away from the sorted station 3. The transport mechanism 5 transports the full box of single crystal edge skins to be sorted to the to-be-sorted station 1, and the sorting mechanism 4 moves the single crystal edge skins one by one to the mark identification station 2. The mark identification station 2 identifies the classification mark on the single crystal edge skin, and the sorting mechanism 4 moves the identified single crystal edge skins to the sorted station 3 corresponding to the classification mark. The transport mechanism 5 transports the sorted single crystal edge skins away from the sorted station 3. In this embodiment, the transport mechanism 5 is specifically an AGV trolley, which automatically transports the single crystal edge skins. The sorting mechanism 4 is specifically a six-axis robot.

[0034] Specifically, the to-be-sorted station 1, the mark identification station 2 and the sorted station 3 are arranged side by side, and a transport channel 6 is provided on both sides of the to-be-sorted station 1, the mark identification station 2 and the sorted station 3, and the transport mechanism 5 performs transport on the transport channel 6.

[0035] In this embodiment, there are two stations 1 to be sorted, one mark identification station 2 and a plurality of sorted stations 3. The two stations 1 to be sorted are arranged adjacent to each other, and the mark identification station 2 is arranged side by side near the station 1 to be sorted. A plurality of sorted stations 3 are arranged corresponding to the classification identification, some of which are arranged side by side with the mark identification station 2 and the station 1 to be sorted, and some are arranged in another row. In order to facilitate the movement of the single crystal edge skin, the sorting mechanism 4 is arranged between the two rows of stations. A ground rail 7 is provided at the bottom of the sorting mechanism 4, and the ground rail 7 is arranged along the side-by-side direction of the stations. The sorting mechanism 4 can move the single crystal edge skin between the station 1 to be sorted, the mark identification station 2 and the sorted station 3 along the ground rail 7. In order to facilitate the transportation of the single crystal edge skin and ensure the safety of transportation, two one-way transportation channels 6 are opened on both sides of the two rows of stations, and an entrance 8 is provided at one end of the transportation channel 6, and an exit 9 is provided at the other end. The transportation mechanism 5 can only enter from the entrance 8 and leave from the exit 9.

[0036] Preferably, a buffer area 10 is provided at the end of the transport channel 6 for buffering the single crystal edge skins to be transported. The specific form of the buffer area 10 is not limited, and it can be a buffer table or a buffer rack.

[0037] Specifically, a first visual inspection device 11 is provided on the station 1 to be sorted, which is used to detect the placement position and angle of the single crystal edge skin, and the first visual inspection device 11 can move horizontally along the station 1 to be sorted. In this embodiment, the transport mechanism 5 transports a full box of single crystal edge skins to be sorted to the station 1 to be sorted. In order to facilitate the sorting mechanism 4 to grab the single crystal edge skin, a first visual device, specifically a 3D camera, is installed above the station 1 to be sorted to shoot the position and angle of the single crystal edge skin placed in the material box 16, which is convenient for the sorting mechanism 4 to grab and position. In this embodiment, two stations 1 to be sorted are provided, and the first visual inspection device 11 is arranged above the two stations 1 to be sorted, and can be driven by the cylinder 12 to move horizontally along the side-by-side direction of the two stations 1 to be sorted. When the single crystal edge skin on a station 1 to be sorted is sorted, the first visual inspection device 11 detects that the single crystal edge skin in the material box has been sorted, and interacts with the transport mechanism 5, and the transport mechanism 5 transports the empty box away. The first visual inspection device 11 moves horizontally to the top of another station 1 to be sorted for inspection, and inspects the edge skin of the single crystal on another station 1 to be sorted. In some embodiments, since some single crystals are composed of multiple short single crystals, some single crystal edge skins are also composed of multiple segments. Before sorting according to electrical parameters, it is necessary to use the first visual device to detect the number of segments of the single crystal edge skin, first sort according to the number of segments, and then sort the electrical parameters of the single crystal edge skin that is not a bar.

[0038] Preferably, a proximity switch 13 is provided on the sorting station 1 for detecting whether there is a single crystal edge skin on the sorting station 1. In this embodiment, when the transport mechanism 5 transports a full box of single crystal edge skins to the sorting station 1, the proximity switch 13 detects the material box, and the sorting mechanism 4 starts sorting.

[0039] Specifically, a second visual detection device 14 is provided at both ends of the mark recognition station 2 for identifying the classification mark. In the present embodiment, classification marks are printed on both ends of the single crystal edge skin, and the sorting mechanism 4 clamps the single crystal edge skin to be sorted, and places the single crystal edge skin on the mark recognition station 2, so that the two ends of the single crystal edge skin are arranged opposite to the second visual detection device 14. The second visual detection device 14 is specifically a 2D camera. After photographing and identifying the classification mark, the sorting mechanism 4 moves the single crystal edge skin to the sorted station 3 corresponding to the classification mark. In order to prevent the single crystal edge skin from contacting metal during the sorting process, a sorting table 15 made of nylon is fixed on the mark recognition station 2, and second visual detection devices 14 are arranged opposite to each other at both ends of the sorting table 15. In order to improve the sorting efficiency, multiple sorting tables 15 can be installed on the mark recognition station 2.

[0040] Specifically, a material box 16 is placed on the sorted station 3, and the material box 16 is set corresponding to the classification mark, and is used to place the sorted single crystal edge skin. In order to facilitate the placement of single crystal edge skins of different categories, a material box 16 is placed on each sorted station 3, and a number corresponding to the classification mark is set on the material box 16. When the material box 16 is full, the transport device transports the full box of sorted single crystal edge skins to the next process, and then places the empty material box 16 with the same number on the corresponding sorted station 3.

[0041] The sorting mechanism 4 has a counting function, which can count the number of single crystal edges placed in the material box 16. The counting function is realized by a computer software control algorithm, which is a prior art and will not be described in detail here. When the sorting mechanism 4 places the single crystal edges into the material box 16 on the sorted station 3, the number of single crystal edges placed in the material box 16 is counted by the counting function. When the number of single crystal edges reaches a set value, the box is full, and at this time, the transport mechanism 5 can transport the full box of sorted single crystal edges away.

[0042] A method for automatically sorting single crystal edge skins, using the single crystal edge skin automatic sorting device as described above, comprises the following steps:

[0043] After the single crystal is cut and cut, it is transported on the line. During the transportation process, the detection device detects the electrical properties of the single crystal, and the coding machine marks the classification mark on the edge of the single crystal. The specific form of the classification mark is not limited, and it can be a number or a letter. In this embodiment, the single crystal is sorted according to its resistivity, and the resistivity is divided into several levels. Each level is represented by a number, and the number is the classification mark, such as:

[0044] 1: Resistivity < 0.3

[0045] 2: 0.3≤Resistivity<0.6

[0046] 3: 0.6≤Resistivity<0.9

[0047] 4: 0.9≤Resistivity<1.3

[0048] 5: 1.3 ≤ Resistivity < 2.0

[0049] …

[0050] After the detection device detects the resistivity, the coding machine will mark the classification mark corresponding to the resistivity at both ends of the edge of the single crystal, and then square it. The marking position is at both ends of the edge of the single crystal. Therefore, after square cutting, the classification mark is at both ends of the edge of the single crystal to be sorted. The edge of the single crystal is placed in a material box for centralized storage.

[0051] The transport mechanism 5 is loaded with a full box of single crystal edges to be sorted and enters from the entrance 8 of the transport channel 6 near the station 1 to be sorted, and places the full box of single crystal edges to be sorted on the station 1 to be sorted along the transport channel 6. When the proximity switch 13 detects the presence of a material box, the ground rail 7 drives the sorting mechanism 4 to move to the station 1 to be sorted. The first visual inspection device 11 moves to the top of the station 1 to be sorted to photograph the placement position and angle of the single crystal edges. The sorting mechanism 4 clamps the single crystal edges and moves the single crystal edges to the mark recognition station 2. When the first visual inspection device 11 captures an image of an empty material box, it interacts with the transport mechanism 5, and the transport mechanism 5 transports the empty box away from the exit 9 of the transport channel 6, and then enters from the entrance 8 of the transport channel 6 to place the full box of single crystal edges to be sorted on the station 1 to be sorted.

[0052] The second visual inspection device 14 identifies the classification mark at the end of the single crystal edge skin placed on the sorting platform 15. The sorting mechanism 4 moves the single crystal edge skin to the material box 16 on the sorted station 3 corresponding to the classification mark. The material box 16 can be engraved with a code corresponding to the classification mark. The counting function on the sorting mechanism 4 counts the single crystal edge skins placed in the material box 16. When the number in the material box 16 reaches the set value, it is a full box. The transportation mechanism 5 transports the full box of sorted single crystal edge skins from the exit 9 of the transportation channel 6, and then transports the empty material box 16 with the same code from the entrance 8 of the transportation channel 6 to the corresponding sorted station 3.

[0053] The advantages and positive effects of the present invention are:

[0054] 1. It replaces manual labor to realize the automatic sorting and transportation of single crystal edge skins, ensuring the accuracy of sorting, improving work efficiency, reducing labor costs, and reducing safety hazards.

[0055] 2. By setting up the first visual inspection device, the accuracy of the single crystal edge skin clamping of the sorting mechanism is improved.

[0056] 3. By setting up a second visual detection device, the accuracy of classification mark recognition is ensured.

[0057] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A single crystal edge skin automatic sorting device, characterized in that: include: The sorting station is used to place the single crystal edge skins to be sorted; A marking and identification station is used to identify the classification mark on the edge skin of the single crystal; A sorted workstation, corresponding to the classification identification setting, is used to classify and place the sorted single crystal edge skins; The sorting mechanism is used to move the single crystal edge skin between the to-be-sorted station, the mark identification station and the sorted station.

2. The single crystal edge automatic sorting device according to claim 1 is characterized by: It also includes a transport mechanism for transporting the single crystal edge skin to be sorted to the to-be-sorted station or transporting the single crystal edge skin that has been sorted away from the sorted station.

3. The single crystal edge automatic sorting device according to claim 2 is characterized by: The to-be-sorted station, the mark identification station and the sorted station are arranged side by side, and transportation channels are provided on both sides of the sorting station, the mark identification station and the sorted station, and the transportation mechanism performs transportation on the transportation channels.

4. The single crystal edge automatic sorting device according to claim 3 is characterized by: A buffer area is provided at the end of the transport channel.

5. A single crystal edge automatic sorting device according to any one of claims 1 to 4, characterized in that: The to-be-sorted station is provided with a first visual detection device for detecting the placement position and angle of the single crystal edge skin.

6. The single crystal edge automatic sorting device according to claim 5 is characterized by: The first visual inspection device is provided with a driving device, and the driving device can drive the first visual inspection device to move horizontally along the to-be-sorted station.

7. The single crystal edge automatic sorting device according to claim 5 is characterized by: The station to be sorted is provided with a proximity switch for detecting whether the single crystal edge skin is placed on the station to be sorted.

8. A single crystal edge automatic sorting device according to any one of claims 1-4 and 6-7, characterized in that: A second visual detection device is provided at both ends of the mark recognition station for identifying the classification mark.

9. The single crystal edge automatic sorting device according to claim 8 is characterized by: A material box is provided on the sorted workstation, and the material box is arranged corresponding to the classification mark and is used for placing the sorted single crystal edge skins.

10. A method for automatically sorting single crystal edge skin, characterized in that: The single crystal edge skin automatic sorting device according to any one of claims 1 to 9 is used, and the steps include: Marking the classification mark on the edge of the single crystal; Placing the single crystal edge skin to be sorted on the to-be-sorted station; The sorting mechanism moves the single crystal edge skin to be sorted to the mark identification station to identify the classification mark; The sorting mechanism moves the single crystal edge skin to the sorted station corresponding to the classification mark.

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