Square piece detection method and packaging system

Abstract

The invention relates to the technical field of square sheet detection and packaging, and discloses a square sheet detection method, which relates to a surface detection unit, and comprises a bearing table, a lower light source, an upper light source and an image acquisition module, the upper light source and the lower light source are respectively used for providing a positive light environment and a backlight environment for the square sheet; the square sheets are arranged on the bearing table in a positive and negative alternating mode and are in a positive light environment and a backlight environment at the same time, and the image acquisition module acquires a first image and a second image above the square sheets; the obtained surface image of the square sheet is clearer, and the accuracy of surface detection, size detection and beveling detection is improved. Meanwhile, the invention further discloses a packaging system, according to the packaging system, automatic feeding is achieved through the adsorption feeding unit, under the combined action of the edge detection unit and the surface detection unit, the unqualified products are recorded, classified packaging of the qualified products and the unqualified products is achieved in the packaging unit, the packaging box detection efficiency is improved, and the yield is increased.

Description

Technical Field

[0001] The present invention relates to the field of square piece detection and packaging technology, and in particular to a square piece detection method and a packaging system. Background Art

[0002] Germanium square pieces usually refer to square pieces made of germanium materials, which are widely used in semiconductors, optoelectronic devices, infrared detectors and other fields. Germanium is an important semiconductor material with good electrical conductivity and optical properties.

[0003] CN117147580A and a visual inspection device for silicon wafer chamfer and chipping defects, comprising: a conveying device for transporting silicon wafers along the front-to-back direction; a plurality of visual inspection mechanisms, located on the left and right sides of the conveying device, each side of the conveying device is equipped with two visual inspection mechanisms, and the two visual inspection mechanisms are respectively used to detect chipping defects of two chamfers on the same side of the silicon wafer.

[0004] The above technical solution also discloses a method for visually detecting chipping defects at the chamfer of silicon wafers. After the steps of image acquisition, image preprocessing, defect detection, classification and judgment, the chipping defects at the chamfer of silicon wafers are detected. The four chamfered edges of the silicon wafer conveyed by the conveying device are inspected to determine whether there are chipping problems at the four corners of the silicon wafer. The chamfer of the silicon wafer is detected without affecting the production capacity of the equipment, thereby improving the yield rate of the production line. However, the above technical solution can only detect the four sides of the silicon wafer, and cannot detect the surface condition, size and chamfer of the silicon wafer. Moreover, after the detection is completed, qualified products and unqualified products cannot be separated. Summary of the invention

[0005] The purpose of the present application is to solve the above-mentioned problems, and a method for detecting square pieces is provided. The detection method arranges an upper light source for providing a positive light environment and a lower light source for providing a backlight environment above and below the carrier respectively, so that the square piece is in a positive light environment and a backlight environment at the same time. Not only is the surface image of the square piece obtained clearer, but the accuracy of surface detection, size detection, and chamfer detection is improved. At the same time, the present application also provides a packaging system, which realizes automatic loading through an adsorption loading unit, records defective products under the joint action of an edge detection unit and a surface detection unit, realizes the classification and packaging of qualified and unqualified products in a packaging unit, improves the efficiency of packaging box detection, and increases production.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A square piece detection method, the method relates to a surface detection unit, the surface detection unit comprises a carrier for placing the square piece, a lower light source located below the carrier, an upper light source located above the carrier, and an image acquisition module for acquiring an image of the square piece;

[0008] The upper light source and the lower light source are used to provide positive light environment and backlight environment for the square piece respectively;

[0009] The square pieces are placed on the carrier in an alternating manner of front and back and are placed in a positive light environment and a backlight environment at the same time, and the image acquisition module acquires the image of the square piece placed on the front side and the image of the square piece placed on the back side above the square piece;

[0010] The illumination of the upper light source is 110×10 4 ~130×10 4 lx, where the illumination of the upper light source can be 110×10 4 lx, 115×10 4 lx, 120×10 4 lx, 125×10 4 lx, 130×10 4 lx.

[0011] The illumination of the lower light source can be 110×10 4 lx, 120×10 4 lx, 130×10 4 lx, 140×10 4 lx, 150×10 4 lx, etc., but not limited to the listed values, other values ​​not listed in this value range are applicable. However, as long as the image acquisition can be satisfied, the illumination of the lower light source should be as low as possible to avoid excessive functions.

[0012] Preferably, when the square sheet is in both a positive light environment and a backlight environment, the axis of the first light emitted by the upper light source, the axis of the square sheet, the axis of the second light emitted by the lower light source, and the axis of the image acquisition module are located on the same straight line.

[0013] The surface detection unit is also provided with a thickness detection module, which is located above the carrying platform and is used to detect the thickness of the square piece.

[0014] Preferably, the upper light source is a coaxial light source; the lower light source is a direct light source; the image acquisition module is a CCD camera, and the carrier is a glass carrier. Of course, the carrier can also be made of other transparent materials such as acrylic.

[0015] Among them, the model of the coaxial light source is: WorldPu CO2-100; the model of the linear light source is: WorldPu XF-PTI080; the model of the CCD camera is: Hikvision MV-CH250-90TM-C-NF.

[0016] Preferably, the surface detection unit further comprises a first horizontal driving module, the carrying platform is connected to the first horizontal driving module, and the first horizontal driving module is used to make the multiple square pieces on the carrying platform pass through the image acquisition module in sequence.

[0017] At the same time, the present application also provides a packaging system, including a frame, an adsorption loading unit connected to the frame, an edge detection unit, a flipping unit, a packaging unit and the surface detection unit as above;

[0018] The adsorption loading unit is used to transport the square piece to the edge detection unit;

[0019] The flipping unit is provided with a first adsorption and conveying module, which is used to adsorb and convey the square sheet in the edge detection unit to the surface detection unit, and flip the square sheet after the surface detection unit completes the upper surface detection;

[0020] The packaging unit is provided with a second adsorption and conveying module, which is used to adsorb the square sheets on the supporting platform into the packaging unit to separately pack qualified products and unqualified products.

[0021] Preferably, the adsorption loading unit includes a storage rack connected to the frame, a shaping unit and a second horizontal driving module, the second horizontal driving module is provided with a lifting mechanism, and the lifting mechanism is provided with an adsorption component; the second horizontal driving module drives the adsorption component to absorb the square pieces on the storage rack, and places them in the shaping unit for shaping, and then the shaped square pieces are adsorbed and transported to the edge detection unit.

[0022] Preferably, the edge detection unit comprises a driving module connected to the frame, side light sources and a CCD module located on both sides of the driving module, a suction nozzle is provided on the driving module, and a first rotation driving mechanism for driving the suction nozzle to rotate is provided in the driving module;

[0023] The adsorption loading unit places the square piece on the suction nozzle, and the first rotating drive mechanism is used to make the edges and corners of the square piece alternately face the side light source and CCD module on the same side, and through the driving module, the edges or corners of the square piece on the suction nozzle pass through the side light source and CCD module in sequence.

[0024] Among them, the model of the CCD module is: Eco PN2KZV-140KM; the model of the side light source is: Worldpu LN5-200W-FN.

[0025] Preferably, the flipping unit includes a support table, and the first adsorption and conveying module is provided with a second rotating drive mechanism for making the adsorbed square sheet face up with its back side facing upward. The support table is provided with a recess, and the first adsorption and conveying module places the square sheet with its back side facing upward on the support table, separates the first adsorption and conveying module from the square sheet through the recess, and then moves to the top of the square sheet to adsorb the back side of the square sheet.

[0026] Preferably, the packaging unit comprises a conveyor belt connected to the frame, wherein there are two conveyor belts arranged side by side, and the conveyor belt is provided with a lower film conveying module for conveying the lower film, an upper film conveying module for conveying the upper film, a conveying roller group, and a cutting module; a heating component is provided in the conveying roller group;

[0027] The second adsorption conveying module places the qualified square pieces on the lower film conveying module of one of the conveyor belts; places the unqualified square pieces on the lower film conveying module of the other conveyor belt; the upper film conveying module fits the upper film on the lower film and wraps the square pieces, heats them through the conveying roller group and conveys them to the conveyor belt; the cutting module is used to cut the upper film and the lower film.

[0028] Compared with the prior art, the beneficial effects of this application are:

[0029] This detection method arranges an upper light source for providing a positive light environment and a lower light source for providing a backlight environment above and below the carrier respectively, so that the square piece is in the positive light environment and the backlight environment at the same time. Not only is the surface image of the square piece clearer, but the accuracy of surface detection, size detection, and chamfer detection is also improved.

[0030] This packaging system realizes automatic loading through the adsorption loading unit. Under the joint action of the edge detection unit and the surface detection unit, the unqualified products are recorded, and the qualified and unqualified products are classified and packaged in the packaging unit, thereby improving the efficiency of packaging box detection and increasing production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a perspective view of the packaging system of the present invention;

[0032] Figure 2 is a top view of the packaging system of the present invention;

[0033] Figure 3 It is a structural schematic diagram of an adsorption loading unit of a packaging system of the present invention;

[0034] Figure 4 is a schematic structural diagram of an edge detection unit of a packaging system of the present invention;

[0035] Figure 5 is a schematic structural diagram of a flip unit of a packaging system of the present invention;

[0036] Figure 6is a schematic structural diagram of a surface detection unit of a packaging system of the present invention;

[0037] Figure 7 is a schematic structural diagram of a packaging unit of a packaging system of the present invention;

[0038] Figure 8 is one of the acquired images of the present invention;

[0039] Fig. 9 This is the second image acquisition of the present invention;

[0040] Fig.10 It is the third image acquisition of the present invention;

[0041] Fig.11 It is the fourth image acquisition of the present invention;

[0042] Fig.12 It is the fifth acquired image of the present invention;

[0043] Fig.13 It is the sixth acquired image of the present invention;

[0044] Fig.14 This is the seventh acquired image of the present invention.

[0045] The reference numerals are as follows:

[0046] Frame 1; adsorption loading unit 2; edge detection unit 3; turning unit 4; packaging unit 5; surface detection unit 6; storage rack 21; shaping unit 22; second horizontal drive module 23; drive module 31; side light source 32; CCD module 33; first adsorption conveying module 41; support table 42; second adsorption conveying module 51; conveyor belt 52; lower film conveying module 53; upper film conveying module 54; conveying roller group 55; cutting module 56; supporting platform 61; lower light source 62; upper light source 63; image acquisition module 64; first horizontal drive module 65; thickness detection module 66; lifting mechanism 231; suction nozzle 311; recess 421; adsorption component 2311. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The square pieces mentioned in the following embodiments and comparative examples are all germanium square pieces, and chamfers are arranged on the four edges of the germanium square piece, namely, the positive left chamfer, positive right chamfer, positive top chamfer, and positive bottom chamfer placed on the front side, and the reverse left chamfer, reverse right chamfer, reverse top chamfer, and reverse bottom chamfer placed on the reverse side; the actual measured size of the square piece is 26*26mm; the actual measured chamfer sizes are: positive left chamfer 0.3mm, positive right chamfer 0.3mm, positive top chamfer 0.3mm, positive bottom chamfer 0.3mm, reverse left chamfer 0.3mm, reverse right chamfer 0.3mm, reverse top chamfer 0.3mm, and reverse bottom chamfer 0.3mm.

[0049] Example 1

[0050] refer to Figures 1 to 7 , a packaging system, comprising a frame 1, an adsorption loading unit 2 connected to the frame 1, an edge detection unit 3, a turning unit 4, a packaging unit 5 and a surface detection unit 6 as above;

[0051] The adsorption feeding unit 2 is used to convey the square piece to the edge detection unit 3;

[0052] The flipping unit 4 is provided with a first adsorption and conveying module 41, which is used to adsorb and convey the square sheet in the edge detection unit 3 to the surface detection unit 6, and flip the square sheet after the surface detection unit 6 completes the upper surface detection;

[0053] The packaging unit 5 is provided with a second adsorption and conveying module 51 , which is used to adsorb the square sheets on the carrier 61 into the packaging unit 5 to separate and pack qualified products from unqualified products.

[0054] In actual application, the adsorption feeding unit 2 adsorbs and conveys the square piece to the edge detection unit 3. After detection by the edge detection unit 3, if there are unqualified products, it will not affect the subsequent surface detection unit 6, but the location of the unqualified products will be recorded. The square piece is adsorbed and conveyed to the surface detection unit 6 by the first adsorption conveying module 41, and the front of the square piece is subjected to surface detection. Then, the first adsorption conveying module 41 turns the square piece over, and the back of the square piece faces upward. The back of the square piece is adsorbed by the first adsorption conveying module 41 and conveyed to the surface detection unit 6 again, and the back of the square piece is subjected to surface detection. If there are new unqualified products, they are recorded again. Finally, the qualified products and unqualified products are adsorbed to the packaging unit 5 by the second adsorption conveying module 51 and packaged separately. In this way, the efficiency of packaging box detection is improved, the inaccuracy of manual detection is avoided, and the output is increased.

[0055] Furthermore, the adsorption loading unit 2 includes a storage rack 21 connected to the frame 1, a shaping unit 22 and a second horizontal driving module 23, the second horizontal driving module 23 is provided with a lifting mechanism 231, and the lifting mechanism 231 is provided with an adsorption component 2311; the second horizontal driving module 23 drives the adsorption component 2311 to absorb the square piece located on the storage rack 21, and places it in the shaping unit 22 for shaping, and then the shaped square piece is adsorbed and transported to the edge detection unit 3.

[0056] Specifically, the second horizontal driving module 23 drives the adsorption component 2311 to the top of the storage rack 21, and drives the adsorption component 2311 downward through the lifting mechanism 231 to adsorb the square piece in the storage rack 21, and then passes through the second horizontal driving module 23 to the top of the shaping unit 22. The adsorption component 2311 places the square piece in the shaping unit 22 and shapes the square piece through the shaping unit 22, which can be understood as limiting the four sides of the square piece, controlling the angle and spacing of the square piece, and the adsorption component 2311 adsorbs the square piece again and transports it to the edge detection unit 3 to realize automatic shaping and loading.

[0057] Preferably, the edge detection unit 3 includes a driving module 31 connected to the frame 1, side light sources 32 and a CCD module 33 located on both sides of the driving module 31, a suction nozzle 311 is provided on the driving module 31, and a first rotation driving mechanism (not shown in the figure) for driving the suction nozzle 311 to rotate is provided in the driving module 31;

[0058] The adsorption loading unit 2 places the square piece on the suction nozzle 311, and the first rotating drive mechanism is used to make the edges and corners of the square piece alternately face the side light source 32 and the CCD module 33 on the same side, and through the driving module 31, the edges or corners of the square piece on the suction nozzle 311 pass through the side light source 32 and the CCD module 33 in sequence.

[0059] When in use, the purpose of the shaping unit 22 is to match the spacing of the square pieces with the spacing of the suction nozzles 311. When the adsorption component 2311 conveys the square pieces to the edge detection unit 3, the adsorption component 2311 can accurately place each square piece on the suction nozzle 311 as long as it is below, and adsorb it through the suction nozzle 311. The driving module 31 drives the suction nozzle 311 to move forward so that the suction nozzle 311 located at the end moves to the front of the side light source 32 and the CCD module 33. The first rotating driving module 31 drives the suction nozzle 311 to rotate and drives the suction nozzle 311 to move backward through the driving module 31, so that the two side surfaces of the square piece pass through the side light source 32 and the CCD module 33 in turn. The first rotating driving module 31 rotates again, and in the same way, the two end faces of the square piece and the four diagonal combinations pass through the side light source 32 and the CCD module 33 in turn, perform complete edge detection on the square piece, and record defective products.

[0060] The side light source 32 and the CCD module 33 have been relatedly described in Chinese patent CN116161295A, and thus will not be described in detail in this embodiment.

[0061] In this embodiment, the flipping unit 4 includes a support table 42, and the first adsorption and conveying module 41 is provided with a second rotating drive mechanism (not shown in the figure) for making the adsorbed square sheet face up with its back side facing upward, and the support table 42 is provided with a recess 421. The first adsorption and conveying module 41 places the square sheet with its back side facing upward on the support table 42, and separates the first adsorption and conveying module 41 from the square sheet through the recess 421, and then moves to the top of the square sheet to adsorb the back side of the square sheet.

[0062] Specifically, after the edge detection of the square piece is completed, the first adsorption and conveying module 41 adsorbs the square piece and conveys it to the surface detection unit 6, and the surface detection unit 6 detects the front side of the square piece. After the detection is completed, the first adsorption and conveying module 41 adsorbs the square piece and makes the back side of the adsorbed square piece face up through the second rotary drive mechanism, and places the square piece on the support table 42. Then the first adsorption and conveying module 41 separates from the square piece through the recess 421, moves to the top of the square piece, adsorbs the back side of the square piece, and conveys the square piece to the surface detection unit 6. The back side of the square piece is detected by the surface detection unit 6. In this way, not only can automatic flipping be achieved, but also the front and back sides of the square piece can be detected in cooperation with the surface detection unit 6 to ensure the accuracy of the detection. The conveying mentioned here can be understood as the first adsorption and conveying module 41 being able to move along the X-axis, Y-axis, and Z-axis.

[0063] Further, the surface detection unit 6 includes a carrier 61 for placing the square sheet, a lower light source 62 located below the carrier 61, an upper light source 63 located above the carrier 61, and an image acquisition module 64 for acquiring an image of the square sheet;

[0064] The upper light source 63 and the lower light source 62 are used to provide a positive light environment and a backlight environment for the square sheet respectively;

[0065] When the square is in both the positive light environment and the backlight environment, the axis of the first light emitted by the upper light source 63, the axis of the square, the axis of the second light emitted by the lower light source 62, and the axis of the image acquisition module 64 are located on the same straight line. The coaxial configuration can reduce the error in the optical path, ensure that the light is directly irradiated on the object to be measured, and thus improve the accuracy of the measurement.

[0066] Under the action of the upper light source 63, the square piece can assist the image acquisition module 64 to make the surface of the square piece clearer, which is convenient for judging the surface defects of the square piece; and under the action of the lower light source 62, the edge of the square piece can be made clearer, which is convenient for detecting the size of the square piece. At the same time, for the square piece with chamfered edges, since the chamfered edges cannot reflect the light source back to the image acquisition module 64, the uniformity of the chamfered edges and other conditions can also be detected through the captured images.

[0067] The illumination of the upper light source 63 is 110×10 4 ~130×10 4 lx; the illumination of the lower light source 62 is not less than 110×10 4 lx.

[0068] In a preferred embodiment, the illumination of the upper light source 63 is the same as that of the lower light source 62, and is 110×10 4 lx;

[0069] In other embodiments, the illumination of the upper light source 63 is the same as the illumination of the lower light source 62, and is 130×10 4 lx.

[0070] The upper light source 63 is a coaxial light source, model: Wardup ​​CO2-100; the lower light source 62 is a direct light source, model: Wardup ​​XF-PTI080; the supporting platform 61 is a supporting platform 61 made of glass; the image acquisition unit is a CCD camera, model: Hikvision MV-CH250-90TM-C-NF.

[0071] The surface detection unit 6 is also provided with a thickness detection module 66, which is located above the carrier 61 and is used to detect the thickness of the square sheet. Specifically, the thickness detection unit is an optical measurement or an ultrasonic measurement.

[0072] Furthermore, the surface detection unit 6 further includes a first horizontal driving module 65, the carrier 61 is connected to the first horizontal driving module 65, and the first horizontal driving module 65 is used to make the multiple square pieces on the carrier 61 pass through the image acquisition module 64 and the thickness detection module 66 in sequence. Through the first horizontal driving module 65, each square piece can be placed in a positive light environment and a backlight environment that are turned on at the same time.

[0073] Preferably, the packaging unit 5 comprises a conveyor belt 52 connected to the frame 1, wherein the conveyor belts 52 are two and arranged side by side, and the conveyor belt 52 is provided with a lower film conveying module 53 for conveying the lower film, an upper film conveying module 54 for conveying the upper film, a conveying roller group 55, and a cutting module 56; a heating component (not shown in the figure) is provided in the conveying roller group 55;

[0074] The second adsorption conveying module 51 places the qualified square pieces on the lower film conveying module 53 of one of the conveyor belts 52; and places the unqualified square pieces on the lower film conveying module 53 of the other conveyor belt 52; the upper film conveying module 54 fits the upper film on the lower film and wraps the square pieces, which are heated and conveyed to the conveyor belt 52 by the conveying roller group 55; the cutting module 56 is used to cut the upper film and the lower film.

[0075] In the initial state, the lower film conveying module 53 and the upper film conveying module 54 convey the lower film and the upper film to the conveying roller group 55 respectively, and laminate the lower film and the upper film through the heating component. In actual use, the square pieces after inspection by the surface inspection unit 6 will be adsorbed by the second adsorption conveying module 51 and conveyed to the lower film conveying module 53. Specifically, qualified products are placed on the lower film conveying module 53 of one of the conveyor belts 52, and unqualified products are placed on the lower film conveying module 53 of the other conveyor belt 52. Until the number of square pieces on the lower film reaches a preset number, the conveying roller group 55 drives the lower film and the upper film to move, and makes the upper film fit on the lower film to wrap the square pieces, and convey them to the corresponding conveyor belt 52. Finally, the upper film and the lower film are cut off by the cutting module 56 to complete the packaging of a preset number of square pieces.

[0076] Example 2

[0077] A square detection method, the method relates to the surface detection unit 6 in embodiment 1;

[0078] The square pieces are placed on the support platform 61 in an alternating manner, and are placed in a positive light environment and a backlight environment at the same time. The image acquisition module 64 acquires a first image of the square piece placed on the front side and a second image of the square piece placed on the back side above the square piece. The illumination of the upper light source 63 is 110×10 4 lx; the illumination of the lower light source 62 is 110×10 4 lx.

[0079] Example 3

[0080] It is basically the same as Example 2, except that the illumination of the upper light source 63 is 130×10 4 lx; the illumination of the lower light source 62 is 130×10 4 lx.

[0081] Example 4

[0082] It is basically the same as Example 2, except that the illumination of the upper light source 63 is 120×10 4 lx; the illumination of the lower light source 62 is 120×10 4 lx.

[0083] Example 5

[0084] It is basically the same as Example 2, except that the illumination of the upper light source 63 is 110×10 4 lx; the illumination of the lower light source 62 is 150×10 4 lx.

[0085] Comparative Example 1

[0086] The same as Example 2, except that the illumination of the upper light source 63 is 150×10 4 lx; the illumination of the lower light source 62 is 110×10 4 lx.

[0087] Comparative Example 2

[0088] It is basically the same as Example 2, except that the illumination of the upper light source 63 is 90×10 4 lx; the illumination of the lower light source 62 is 110×10 4 lx.

[0089] Comparative Example 3

[0090] It is basically the same as Example 2, except that the illumination of the upper light source 63 is 110×10 4 lx; the illumination of the lower light source 62 is 90×10 4 lx.

[0091] Comparative Example 4

[0092] It is basically the same as Example 2, except that the illumination of the upper light source 63 is 110×10 4 lx, no lower light source.

[0093] The square pieces were detected by the square piece detection methods of Examples 2 to 5 and Comparative Examples 1 to 4, respectively. The image acquisition results are shown in Table 1, the measurement results are shown in Table 2, and the acquired images are shown in Table 3. Figures 8 to 14 shown.

[0094] Table 1. Image acquisition results of square pieces

[0095]

[0096] Table 2 Measurement results of square pieces

[0097]

[0098]

[0099] The first image and the second image obtained in Example 2 refer to Figure 8 and Fig. 9As shown, since the first image and the second image are only the front and back sides of the same square piece, it will not affect the result of the acquired image, so the acquired first image and the second image are only illustrated with one piece.

[0100] Result analysis:

[0101] 1. From the results of Examples 2 to 4, it can be seen that in the positive light environment and the backlight environment, the illumination of the upper light source is 110×10 4 ~130×10 4 Within the lx range, the illumination of the lower light source is 110×10 4 lx, can obtain clear first and second images, refer to Figure 8 and Fig. 9 , the size data and chamfer data can be obtained from the first image and the second image, and the difference between the obtained size and the actual measured size is very small, the maximum difference is only 0.526mm, and the maximum difference of the chamfer is only 0.03mm.

[0102] 2. From the results of Example 2 and Comparative Examples 1 and 2, it can be seen that the upper light source of Comparative Example 1 adopts a higher illumination value, and the first image and the second image obtained are referenced to Fig.10 , Fig.10 It can be clearly seen that there is overexposure, and the brightness of some positions on the surface of the square piece is too high. Although it will not affect the detection of surface defects and size detection, it can be seen from Table 2 that comparative example 1 cannot obtain the data of the chamfered edge; the upper light source of comparative example 2 uses a lower illumination value, and the first image and the second image obtained are reference Fig.11 , Fig.11 It can be clearly seen that the acquired image is very dim. Although the size can be obtained, the surface defects are basically invisible. Moreover, it can be seen from Table 2 that the comparative example 2 cannot obtain the chamfer data.

[0103] 3. From the results of Example 2, Example 5, and Comparative Example 3, it can be seen that the lower light source of Example 5 adopts a higher illumination value, and the first image and the second image obtained are referenced to Fig.12 The surface and chamfer of the square piece are clear, and the size and chamfer data can be obtained; while the lower light source of comparative example 3 uses a 110×10 4 lx lower illumination, the first image and the second image reference Fig.13 ,from Fig.13 It can be seen that the lower light source cannot make the edge of the square piece clear, and there will be shadows near the edge, which affects the acquisition of the chamfer data.

[0104] 4. From the results of Example 2 and Comparative Example 4, it can be seen that Comparative Example 4 lacks the lower light source, and the first image and the second image obtained are referenced Fig.14 ,from Fig.14 It can be seen that although the size data of the square can be obtained, the shadow on the edge of the square affects the acquisition of the chamfer data.

[0105] In summary, the detection method sets an upper light source for providing a positive light environment and a lower light source for providing a backlight environment above and below the carrier respectively, so that the square piece is in the positive light environment and the backlight environment at the same time. Experiments have proved that the illumination control of the upper light source is 110×10 4 ~130×10 4 Within the lx range, the lower light source is not less than 110×10 4 The illumination of lx not only makes the surface image of the square piece clearer, but also improves the accuracy of surface detection, size detection, and chamfer detection.

[0106] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A square detection method, characterized in that: The method relates to a surface detection unit, which includes a carrier platform for placing the square sheet, a lower light source located below the carrier platform, an upper light source located above the carrier platform, and an image acquisition module for acquiring an image of the square sheet; The upper light source and the lower light source are used to provide a positive light environment and a backlight environment for the square sheet respectively; The square piece is placed on the supporting platform in an alternating manner of front and back, and is placed in a positive light environment and a backlight environment at the same time, and the image acquisition module acquires a first image of the square piece placed on the front side and a second image of the square piece placed on the back side above the square piece; and acquires the surface condition, chamfer condition and size condition of the square piece through the first image and the second image; The illumination of the upper light source is 110×10 4 ~130×10 4 lx, the illumination of the lower light source is not less than 110×10 4 lx.

2. The square detection method according to claim 1, characterized in that: When the square sheet is in both a positive light environment and a backlight environment, the axis of the first light emitted by the upper light source, the axis of the square sheet, the axis of the second light emitted by the lower light source, and the axis of the image acquisition module are located on the same straight line.

3. The square detection method according to claim 1, characterized in that: The surface detection unit is also provided with a thickness detection module, which is located above the supporting platform and is used to detect the thickness of the square sheet.

4. The square detection method according to claim 1, characterized in that: The upper light source is a coaxial light source; the lower light source is a direct light source; the image acquisition module is a CCD camera, and the supporting platform is a supporting platform made of glass.

5. The square detection method according to claim 1, characterized in that: The surface detection unit further comprises a first horizontal driving module, the carrying platform is connected to the first horizontal driving module, and the first horizontal driving module is used to make the multiple square pieces on the carrying platform pass through the image acquisition module in sequence.

6. A packaging system, characterized in that: It comprises a frame, an adsorption loading unit connected to the frame, an edge detection unit, a turning unit, a packaging unit and a surface detection unit as claimed in any one of claims 1 to 5; The adsorption loading unit is used to transport the square sheet to the edge detection unit; The flipping unit is provided with a first adsorption and conveying module, which is used to adsorb and convey the square sheet in the edge detection unit to the surface detection unit, and flip the square sheet after the surface detection unit completes the upper surface detection; The packaging unit is provided with a second adsorption and conveying module, and the second adsorption and conveying module is used to adsorb the square sheet on the supporting platform into the packaging unit to separately pack qualified products and unqualified products.

7. The packaging system according to claim 6, characterized in that: The adsorption loading unit includes a storage rack connected to the frame, a shaping unit and a second horizontal driving module, the second horizontal driving module is provided with a lifting mechanism, and the lifting mechanism is provided with an adsorption component; the second horizontal driving module drives the adsorption component to absorb the square piece located on the storage rack, and places it in the shaping unit for shaping, and then the shaped square piece is adsorbed and transported to the edge detection unit.

8. The packaging system according to claim 6, characterized in that: The edge detection unit includes a driving module connected to the frame, side light sources and a CCD module located on both sides of the driving module, a suction nozzle is provided on the driving module, and a first rotation driving mechanism for driving the suction nozzle to rotate is provided in the driving module; The adsorption loading unit places the square piece on the suction nozzle, and the first rotating drive mechanism is used to make the edges and corners of the square piece alternately face the side light source and the CCD module on the same side, and through the driving module, the edges or corners of the square piece on the suction nozzle pass through the side light source and the CCD module in sequence.

9. The packaging system according to claim 6, characterized in that: The flipping unit includes a support table, and the first adsorption and conveying module is provided with a second rotating drive mechanism for making the adsorbed square sheet face up with its back side facing upward. The support table is provided with a recessed portion, and the first adsorption and conveying module places the square sheet with its back side facing upward on the support table, and separates the first adsorption and conveying module from the square sheet through the recessed portion, and then moves to the top of the square sheet to adsorb the back side of the square sheet.

10. The packaging system according to claim 6, characterized in that: The packaging unit comprises a conveyor belt connected to the frame, wherein the conveyor belts are two and arranged side by side, and the conveyor belts are provided with a lower film conveying module for conveying the lower film, an upper film conveying module for conveying the upper film, a conveying roller group, and a cutting module; a heating component is provided in the conveying roller group; The second adsorption conveying module places the qualified square pieces on the lower film conveying module of one of the conveyor belts; and places the unqualified square pieces on the lower film conveying module of the other conveyor belt; the upper film conveying module attaches the upper film to the lower film, wraps the square pieces, heats them through the conveying roller group, and conveys them to the conveyor belt; The cutting module is used for cutting the upper film and the lower film.

Images