Optical recognition detection device and optical recognition detection method

Abstract

This invention provides an optical recognition and detection device and method. The optical recognition and detection device includes: a conveying track, a stage, a first magnet assembly, a first magnetic guide, a second magnet assembly, and a second magnetic guide. The stage is rotatably mounted on the conveying track. The first N-pole and first S-pole of the first magnet assembly are positioned at a first height on the stage, 180 degrees apart from each other. The first magnetic guide is located at the first height and has a consistent magnetic pole on its surface facing the conveying track. The second N-pole and second S-pole of the second magnet assembly are positioned at a second height on the stage, different from the first height, 180 degrees apart from each other. The second N-pole and second S-pole are 90 degrees apart from the first N-pole and first S-pole, respectively. The second magnetic guide is located at the second height and has a consistent magnetic pole. The optical recognition and detection device and method of this invention improve upon the problem of easy errors in the interpretation of existing technologies and add the function of interpreting coating film thickness.

Description

Technical Field

[0001] This invention relates to an optical identification and detection device and an optical identification and detection method, and more particularly to an optical identification and detection device and an optical identification and detection method capable of determining the thickness of a coated film. Background Technology

[0002] like Figure 1 As shown, after a film F is sprayed onto a part S by the spraying mechanism P, if the color of part S and film F are similar, it is impossible to use color difference to identify whether or not film F is coated. Therefore, the image capturing mechanism C needs to capture an image of individual parts S after spraying and compare it with the difference in appearance and geometric dimensions of parts S before spraying to make a judgment. However, when the coating area is too narrow, it is easy to make a misreading.

[0003] In addition, on the production line, the material S moves dynamically and continuously along the conveyor track T, making it difficult to measure the thickness of the coated film F. If the machine needs to be stopped or individual parts S need to be clamped for thickness measurement, the production speed will inevitably be greatly reduced. Summary of the Invention

[0004] The purpose of this invention is to solve various problems of existing optical recognition and to propose an optical recognition detection device and method that can determine the thickness of coated films.

[0005] To achieve the above and other objectives, the present invention provides an optical recognition and detection device, comprising: a conveying track having a spraying position and an image capturing position downstream of the spraying position; a platform rotatably disposed on the conveying track, the platform having a material carrying area; a first magnet assembly having a first N-pole and a first S-pole, the first N-pole and the first S-pole being disposed at a first height of the platform with a rotation axis of the platform as the center and differing from each other by 180 degrees; a first magnetic guide being disposed upstream of the spraying position at the first height, the surface of the first magnetic guide facing the conveying track having consistent magnetic poles; and a second magnet assembly having a second N-pole and a second S-pole. The second S-end, the second N-end and the second S-end are disposed at a second height of the stage, 180 degrees apart from each other, with the stage's rotation axis as the center. This second height is different from the first height. The second N-end is 90 degrees away from the first N-end and the first S-end, respectively, with the stage's rotation axis as the center. The second S-end is 90 degrees away from the first N-end and the first S-end, respectively, with the stage's rotation axis as the center. A second magnetic guide is disposed upstream of the image capturing position and downstream of the spraying position. The second magnetic guide is located at the second height, and the surface of the second magnetic guide facing the transport track has a consistent magnetic pole.

[0006] Optionally, the first magnet assembly includes two magnets, and the second magnet assembly includes two magnets.

[0007] Optionally, the first magnet group and the second magnet group are each a bar magnet disposed radially on the platform.

[0008] Optionally, the platform is disposed through the conveyor track, the material bearing area is located above the conveyor track, and the first height and the second height are located below the conveyor track.

[0009] Optionally, it also includes an image capturing mechanism disposed on one side of the image capturing position.

[0010] Optionally, it also includes a spraying mechanism, which is located on one side of the spraying position.

[0011] Optionally, a drying mechanism is also included, which is disposed on the conveyor track.

[0012] Optionally, a heating mechanism is also included, disposed in the drying mechanism.

[0013] Optionally, a sorting mechanism may also be included, located downstream of the image capturing location.

[0014] Optionally, the transport track is enclosed.

[0015] Optionally, the transport track is circular.

[0016] The present invention also proposes an optical recognition and detection method, comprising the following steps: providing a conveying track and a platform rotatably disposed on the conveying track; providing a first magnetic guide located upstream of the spraying mechanism, the first magnetic guide attracting a designated magnetic pole at a first height on the platform; spraying a material on the platform; providing a second magnetic guide located downstream of the first magnetic guide, the second magnetic guide attracting a designated magnetic pole at a second height on the platform, thereby rotating the platform by 90 degrees; and capturing an image of the material.

[0017] Optionally, it also includes drying the material on the conveyor track.

[0018] Optionally, it also includes: determining whether the material is qualified based on the image of the material.

[0019] Optionally, it also includes: collecting qualified and unqualified materials separately.

[0020] Therefore, the optical identification and detection device and optical identification and detection method of the present invention improve the problem of easy error in the interpretation of defects in the prior art, and add the function of interpreting the coating film thickness.

[0021] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the invention. However, these descriptions and drawings are only for illustrating the present invention and are not intended to limit the scope of the invention in any way. Attached Figure Description

[0022] Figure 1 This is an existing optical inspection device;

[0023] Figure 2 This is a three-dimensional schematic diagram of the optical recognition and detection device according to an embodiment of the present invention;

[0024] Figure 3 for Figure 2 A partially enlarged schematic diagram of the spraying location;

[0025] Figure 4A This is a three-dimensional schematic diagram of the platform according to an embodiment of the present invention;

[0026] Figure 4B This is a top view of the platform according to an embodiment of the present invention;

[0027] Figure 5 for Figure 2 A partially enlarged schematic diagram of the image capture location;

[0028] Figure 6 This is a flowchart of the optical recognition and detection method according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the rotation of the platform according to an embodiment of the present invention.

[0030] [Attached image labels]

[0031] 100 Optical Recognition and Detection Device

[0032] 1. Conveying track

[0033] 2 platforms

[0034] 21 Material Bearing Area

[0035] 22 heads

[0036] 23 Neck

[0037] 24 Body

[0038] 3 First Magnet Group

[0039] 31 The First N Extremes

[0040] 32 First S extreme

[0041] 4 First magnetic guide

[0042] 41 Surface

[0043] 5. Second magnet group

[0044] 51 The Second N Extreme

[0045] 52 Second S extreme

[0046] 6 Second magnetic guide

[0047] 61 Surface

[0048] 7. Drying Mechanism

[0049] 8 Heating mechanism

[0050] 9 sorting institutions

[0051] 91. Qualified product blow-off nozzle

[0052] 92. Defective products are rejected for air nozzles.

[0053] A1 First Angle

[0054] A2 Second Angle

[0055] A3 Third Angle

[0056] A4 Fourth Angle

[0057] C Image Capture Mechanism

[0058] F membrane

[0059] K Feeding device

[0060] L1 Spraying position

[0061] L2 image capture location

[0062] P spraying mechanism

[0063] S material

[0064] Steps S101 to S108 Detailed Implementation

[0065] To fully understand the present invention, the following specific embodiments, in conjunction with the accompanying drawings, will provide a detailed description. Those skilled in the art can understand the purpose, features, and effects of the present invention from the content disclosed in this specification. It should be noted that the present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the inventive point of the present invention. Furthermore, the accompanying drawings are for simple illustrative purposes only and are not depictions based on actual dimensions. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the claims of the present invention. The following explanation is provided:

[0066] like Figures 2 to 5 As shown, the optical recognition and detection device 100 of this embodiment includes: a transport track 1, a platform 2, a first magnet group 3, a first magnetic guide 4, a second magnet group 5, and a second magnetic guide 6.

[0067] like Figure 2 As shown, the feeding device K places the material S onto the platform 2 upstream of the conveying track 1. The conveying track 1 transports the platform 2 sequentially past the spraying position L1 and the image capturing position L2 downstream of the spraying position L1. In this embodiment, the conveying track 1 uses the periphery of a circular turntable as a closed annular conveying track. However, the invention is not limited to this; the conveying track 1 can be of various forms, such as a straight conveying track, a U-shaped conveying track, or other non-circular closed or open conveying tracks.

[0068] like Figure 3 and Figure 4A As shown, the platform 2 is rotatably mounted on the conveying track 1, and the platform 2 has a material-bearing area 21 for bearing material S. In this embodiment, the material-bearing area 21 is located on the top of the platform 2 and can be a flat surface or a recessed portion. However, the present invention is not limited to this; the material-bearing area 21 can be in various forms, such as being located on the side of the platform 2 so that the material S is embedded in the platform; or the platform 2 itself can be a clamp that clamps the material S before being mounted on the conveying track 1.

[0069] like Figures 3 to 5 As shown, the first magnet group 3 has a first N end 31 and a first S end 32, which are set at a first height of the platform 2 with the rotation axis of the platform 2 as the center and 180 degrees apart from each other.

[0070] Similarly, the second magnet assembly 5 has a second N-terminal 51 and a second S-terminal 52, which are positioned at a second height of the platform 2, 180 degrees apart from each other, about the rotation axis of the platform 2. This second height differs from the first height, and is as follows: Figure 4B As shown, the second N-end 51 is 90 degrees away from the first N-end 31 and the first S-end 32 with the rotation axis of the stage 2 as the center, and the second S-end 52 is 90 degrees away from the first N-end 31 and the first S-end 32 with the rotation axis of the stage 2 as the center.

[0071] In other words, with the rotation axis of platform 2 as the center, platform 2 can be divided into four angles at equal angles: first angle A1, second angle A2, third angle A3, and fourth angle A4, with a 90-degree interval between any two adjacent angles.

[0072] like Figures 3 to 5As shown, the first N-end 31 and the first S-end 32 are interchangeably set at the first angle A1 and the third angle A3, meaning that it can actually be changed so that the first N-end 31 is set at the third angle A3 and the first S-end 32 is set at the first angle A1. The second N-end 51 and the second S-end 52 are interchangeably set at the second angle A2 and the fourth angle A4, meaning that it can actually be changed so that the second N-end 51 is set at the fourth angle A4 and the second S-end 52 is set at the second angle A2, and it is not necessarily set in the same way. Figure 4A , Figure 4B The settings shown are limited.

[0073] like Figure 3 As shown, the first magnetic guide 4 is positioned upstream of the spraying position L1. The height of the first magnetic guide 4 is at a first height aligned with the first magnet group 3, and avoids the second height where the second magnet group 5 is located. The surface 41 of the first magnetic guide 4 facing the conveyor track 1 has a consistent magnetic pole, i.e., both the S pole and the N pole face the conveyor track 1, while the other magnetic pole faces away from the conveyor track 1. In this embodiment, the first magnetic guide 4 is in the form of a long strip-shaped guide rail, slightly curved along the annular conveyor track 1, while maintaining a constant distance from the platform 2. However, the invention is not limited to this; the form of the first magnetic guide 4 can be changed, or it can be matched with different shapes of conveyor tracks 1 or platforms 2. The first magnetic guide 4 is not limited to being located on the outer periphery of the conveyor track 1, but can also be located on the inner periphery of the conveyor track 1. The first magnetic guide 4 is preferably a permanent magnet, but it can also be an electromagnet.

[0074] like Figure 5 As shown, the second magnetic guide 6 is positioned upstream of the image capturing position L2 and downstream of the spraying position L1. Approximately, the height of the second magnetic guide 6 is at a second height aligned with the second magnet assembly 5, and avoids the first height where the first magnet assembly 3 is located. The surface 61 of the second magnetic guide 6 facing the transport track 1 has a consistent magnetic pole. The second magnetic guide 6 can be the same component as the first magnetic guide 4, differing only in its position and height, and it is not limited to which magnetic pole faces the transport track 1.

[0075] Please cooperate next. Figure 6 This explains how to operate the optical recognition and detection device 100 of the present invention to perform the optical recognition and detection method.

[0076] refer to Figure 2First, in step S101, a conveyor track 1 and a platform 2 rotatably disposed on the conveyor track 1 are provided. There may be one or more platforms 2, preferably with the axis of rotation of the platform 2 parallel to the direction of gravity. A feeding device K places a material S onto the platform 2 from upstream of the conveyor track 1. How the feeding device K enables the platform 2 to carry the material S is prior art and not relevant to this invention, and therefore will not be described in detail.

[0077] In step S103, a first magnetic guide 4 is provided upstream of the spraying mechanism P (located at the spraying position L1). The conveyor track 1 and the conveyor platform 2 must pass through the first magnetic guide 4 before reaching the spraying position L1, such as... Figure 3 As shown, the first magnetic guide 4 attracts a designated magnetic pole of the first magnet group 3 at a first height on the platform 2 and repels the other magnetic pole. For example, when the surface 41 of the first magnetic guide 4 facing the transport track 1 is the S pole, the first N pole 31 is attracted and the first S pole 32 is repelled, thus forcing the platform 2 to turn (assuming it was originally facing the transport track 1 with the non-first N pole 31 facing the platform 1); if the surface 41 of the first magnetic guide 4 facing the transport track 1 is the N pole, the first S pole 32 is attracted and the first N pole 31 is repelled. Regardless of which configuration the first magnetic guide 4 is, it can ensure that each platform 2 faces the first magnetic guide 4 at a consistent angle.

[0078] Next, in step S104, the conveyor track 1 transports the carrier platform 2 to the spraying position L1, and the workpiece S is sprayed with the required film F by the spraying mechanism P. The spraying mechanism P can spray from the outside or inside of the conveyor track 1 (the example in the attached figure shows the outside), and the maximum spraying range is 180 degrees.

[0079] Next, refer to Figure 2 and Figure 5 In step S105, a second magnetic guide 6 is provided downstream of the first magnetic guide 4. The second magnetic guide 6 attracts a designated magnetic pole of the second magnet group 5 at a second height on the platform 2, thereby rotating the platform 2 by 90 degrees. Since the platform 2 has been pre-adjusted by the first magnetic guide 4 so that either the first N-pole 31 or the first S-pole 32 faces the direction of the first magnetic guide 4 (outer direction in this embodiment), any magnetic pole of the second magnet group 5 is exactly 90 degrees away from the second magnetic guide 6. At this time, regardless of whether the surface 61 of the second magnetic guide 6 facing the transport track 1 is an N-pole or an S-pole, it will attract one magnetic pole of the second magnet group 5 and repel the other magnetic pole, causing the platform 2 to rotate by 90 degrees.

[0080] In other words, the optical recognition and detection method of the present invention utilizes two magnetic guides and two sets of magnets at angles perpendicular to each other to make the stage stably rotate 90 degrees after spraying and then be transported to the image capturing position L2.

[0081] In step S106, the image capturing mechanism C located at image capturing position L2 captures an image of the material S.

[0082] like Figure 7 As shown, the film F on the material S is laid flat on the surface at 180 degrees. After the stage 2 is rotated 90 degrees, the boundary between the film F and the filmless F on the material S is directly opposite the capturing lens of the image capturing mechanism C. This makes it easy to analyze whether there are defects (such as whether the coating area is complete) and to determine the thickness of the film F in the image captured by the image capturing mechanism C.

[0083] In summary, the optical recognition and detection device and method of the present invention improve the problem of easy error in judging defects in the prior art, and add the function of judging the coating thickness.

[0084] Furthermore, in this embodiment, the first magnet assembly 3 and the second magnet assembly 5 are each a bar magnet, respectively disposed radially (perpendicular to the rotation axis) of the platform 2. The magnetic ends of the first magnet assembly 3 are the first N-terminal 31 and the first S-terminal 32, respectively, and the magnetic ends of the second magnet assembly 5 are the second N-terminal 51 and the second S-terminal 52, respectively. In this embodiment, the platform 2 has two through holes of different heights to accommodate the first magnet assembly 3 and the second magnet assembly 5, which has the advantages of easy assembly and easy identification. However, in other embodiments, the platform 2 may also be a single hole, with one end of the magnetic pole exposed on the surface of the platform 2 and the other end embedded in the platform 2. Alternatively, both ends of the magnet assembly may be embedded in the platform 2 to prevent them from falling off during transport and rotation of the platform 2.

[0085] In another example, the first magnet assembly 3 is no longer a single bar magnet, but comprises two independent magnets, with their N and S poles facing radially outward, respectively, forming the first N-pole end 31 and the first S-pole end 32. The two independent magnets can be glued, embedded, or buried in the platform 2. Similarly, the second magnet assembly 5 can also comprise two magnets, the variations of which are the same as those of the first magnet assembly 3, and will not be described further.

[0086] Furthermore, in this embodiment, as Figure 3 and Figure 4AAs shown, the platform 2 is disposed through the conveyor track 1 to make the platform 2 more stable and prevent it from tipping over during conveying and rotation. In this embodiment, the platform 2 has a head 22 located above the conveyor track 1, and the material carrying area 21 is located at the head 22 (but it can also be located at other positions); the neck 23 of the platform 2 is thinner than the head 22 above, and is engaged with the conveyor track 1 through the neck 23. The body 24 of the platform 2 is located below the conveyor track 1, and the first height where the first magnet group 3 is located and the second height where the second magnet group 5 is located are both located at the body 24. However, the present invention is not limited to this, and the first magnet group 3 and the second magnet group 5 can be located at other positions.

[0087] Furthermore, in one embodiment, the optical recognition and detection device 100 of the present invention further includes the aforementioned image capturing mechanism C, which is disposed on one side of the image capturing position L2. The image capturing mechanism C is, for example, a camera with a photosensitive coupling component, which has advantages such as fast shooting and low cost; however, the present invention is not limited to this, and the image capturing mechanism C can be a camera of other forms.

[0088] Furthermore, in one embodiment, the optical recognition and detection device 100 of the present invention further includes the aforementioned spraying mechanism P, disposed on one side of the spraying position L1. The spraying mechanism P may also be equipped with a sensing element (not shown in the figure) to sense whether the stage 2 is about to pass by and trigger the spraying mechanism P to perform spraying. The sensing element may be a simple image capturing device, a mechanical trigger switch, an optical sensor, or an electromagnetic sensor, and the present invention is not limited thereto.

[0089] Furthermore, in one embodiment, the optical recognition detection device 100 of the present invention further includes a drying mechanism 7 disposed on the conveyor track 1. The drying mechanism 7 is preferably disposed upstream of the spraying position L1 and upstream of the image capturing position, and the drying mechanism 7 covers a portion of the conveyor track 1 to form an air supply chamber. A heating mechanism 8 may be further disposed on the drying mechanism 7 to form a hot air drying chamber.

[0090] Therefore, between steps S101 and S103, and between steps S104 and S105, step S102 can be selectively added: drying the material S on the conveyor track 1. The actual location, length, and whether the drying mechanism 7 is equipped with a heating mechanism 8 can be changed and adjusted according to the conditions required for spraying.

[0091] Furthermore, the optical recognition and detection method of the present invention may also include step S107: determining whether the material S is qualified based on the image of the material S.

[0092] Furthermore, the optical recognition and detection method of the present invention may further include step S108: collecting qualified and unqualified parts respectively. For example... Figure 2 and Figure 5As shown, the optical recognition and detection device 100 of the present invention further includes a sorting mechanism 9, which is disposed downstream of the image capturing position L2. The sorting mechanism 9 can take various forms. For example, in this embodiment, the sorting mechanism 9 is in the form of an air nozzle, including a qualified product blowing-off nozzle 91 and a defective product rejection nozzle 92 (the positions of the two can be interchanged). Based on the judgment result of step S107, qualified and defective materials are blown off separately, thereby separating and collecting the qualified and defective materials. However, the present invention is not limited to this. The sorting mechanism 9 can also reciprocate in a mechanically powered manner to push off qualified and defective materials respectively. In addition, the sorting mechanism 9 can also be, for example, the sorting method of utility model patent publication number TWM433254, which uses a control unit to switch tracks, allowing the screened screws to enter the good product track or the defective product track.

[0093] Therefore, the optical recognition and detection device 100 of the present invention may further include a control mechanism (not shown), a signal-connected image capturing mechanism C, and a sorting mechanism 9. The control mechanism is a component capable of issuing control commands and performing analysis and judgment, and may be, for example, a control chip or a control circuit. The control mechanism controls the image capturing mechanism C to capture an image of the material S, and determines whether the material S is qualified. Based on the aforementioned determination, the control mechanism then controls the sorting mechanism 9 to perform the separation and collection of the material S.

[0094] The present invention has been disclosed above with reference to preferred embodiments. However, those skilled in the art should understand that the embodiments are for illustrative purposes only and should not be construed as limiting the scope of the invention. It should be noted that all variations and substitutions equivalent to the described embodiments should be included within the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An optical recognition and detection device, characterized in that, The optical recognition and detection device includes: The conveyor track is equipped with a spraying position and an image capturing position located downstream of the spraying position; A platform is rotatably mounted on the conveying track, and the platform is provided with a material carrying area; The first magnet assembly has a first N-pole and a first S-pole, and the first N-pole and the first S-pole are disposed at a first height of the platform with a 180-degree difference from each other about the rotation axis of the platform. A first magnetic guide is disposed upstream of the spraying position and at the height of the first height, and the surface of the first magnetic guide facing the conveying track has consistent magnetic poles; The second magnet assembly has a second N-pole and a second S-pole. The second N-pole and the second S-pole are positioned at a second height on the stage, 180 degrees apart from each other, about the rotation axis of the stage. This second height differs from the first height. The second N-pole is 90 degrees away from both the first N-pole and the first S-pole, and the second S-pole is also 90 degrees away from both the first N-pole and the first S-pole, about the rotation axis of the stage. A second magnetic guide is disposed upstream of the image capturing position and downstream of the spraying position. The second magnetic guide is located at the second height, and the surface of the second magnetic guide facing the transport track has consistent magnetic poles.

2. The optical recognition and detection device according to claim 1, characterized in that, The first magnet assembly includes two magnets, and the second magnet assembly includes two magnets.

3. The optical recognition and detection device according to claim 1, characterized in that, The first magnet group and the second magnet group are each a long bar magnet, which are arranged radially on the platform.

4. The optical recognition and detection device according to claim 1, characterized in that, The platform is disposed through the conveying track, the material bearing area is located above the conveying track, and the first height and the second height are located below the conveying track.

5. The optical recognition and detection device according to claim 1, characterized in that, It also includes an image capturing mechanism, which is located on one side of the image capturing position.

6. The optical recognition and detection device according to claim 1, characterized in that, It also includes a spraying mechanism, which is located on one side of the spraying position.

7. The optical recognition and detection device according to claim 1, characterized in that, It also includes a drying mechanism, which is located on the conveyor track.

8. The optical recognition and detection device according to claim 7, characterized in that, It also includes a heating mechanism disposed in the drying mechanism.

9. The optical recognition and detection device according to claim 1, characterized in that, It also includes a sorting mechanism located downstream of the image capturing position.

10. The optical recognition and detection device according to claim 1, characterized in that, The conveyor track is enclosed.

11. The optical recognition and detection device according to claim 10, characterized in that, The transport track is circular.

12. An optical recognition and detection method, characterized in that, The optical recognition and detection method includes the following steps: A conveyor track and a platform rotatably disposed on the conveyor track are provided. The conveyor track has a spraying position and an image capturing position located downstream of the spraying position. The platform has a material carrying area. A spraying mechanism, a first magnet assembly, and a first magnetic guide located upstream of the spraying mechanism are provided, the first magnet assembly having a first N-end and a first S-end, the first N-end and the first S-end being disposed at a first height of the platform with respect to the rotation axis of the platform and 180 degrees apart from each other. The first magnetic guide is disposed upstream of the spraying position and at the first height, the surface of the first magnetic guide facing the transport track having consistent magnetic poles, and the first magnetic guide attracts a designated magnetic pole at the first height on the platform. Spraying the material on the carrier platform; A second magnet assembly and a second magnetic guide are provided. The second magnet assembly has a second N-pole and a second S-pole. The second N-pole and the second S-pole are disposed at a second height of the stage, 180 degrees apart from each other, about the rotation axis of the stage. The second height is different from the first height. The second N-pole is 90 degrees away from both the first N-pole and the first S-pole, and the second S-pole is 90 degrees away from both the first N-pole and the first S-pole, about the rotation axis of the stage. The second magnetic guide is disposed upstream of the image capturing position and downstream of the spraying position. The second magnetic guide is located at the second height. The surface of the second magnetic guide facing the transport track has a consistent magnetic pole. The second magnetic guide attracts a designated magnetic pole at the second height on the stage, thereby rotating the stage by 90 degrees. Capture an image of the material.

13. The optical recognition and detection method according to claim 12, characterized in that, Also includes: The material is dried on the conveyor track.

14. The optical recognition and detection method according to claim 12, characterized in that, Also includes: Based on the image of the material, determine whether the material is qualified.

15. The optical recognition and detection method according to claim 14, characterized in that, Also includes: Collect qualified and unqualified materials separately.

Images