A resistance substrate positive and negative detection device and detection method

Abstract

The application belongs to the technical field of resistance substrate detection, and discloses a resistance substrate forward and reverse detection device and a detection method. The device comprises a first conveying structure, one side of the first conveying structure is fixedly provided with a detection frame, the bottom end of the detection frame is fixedly provided with a CCD detection structure, the top end of the first conveying structure is provided with a separation assembly, the inside of the first conveying structure is provided with a first rotating shaft, one end of the first rotating shaft is provided with a motor, the separation assembly comprises a cylinder arranged at the top end of the first conveying structure, the output end of the cylinder is provided with a push plate, one side of the first conveying structure is provided with a second conveying structure. When the resistance substrate is detected forward and reversely, the CCD detection structure is used for detection. When unqualified products are detected, the cylinder is started through PLC control, and the unqualified resistance substrate is pushed to the top end of the second conveying structure, so that the qualified and unqualified resistance substrates are separated, manual intervention is reduced, and the overall production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of resistance substrate detection, and particularly relates to a resistance substrate positive and negative detection device and a detection method. BACKGROUND

[0002] The resistance substrate, also known as a resistance mounting plate or a resistance carrier plate, is a kind of substrate specially designed for mounting resistors, which is usually made of insulating materials and has excellent electrical properties and mechanical strength. The main function of the resistance substrate is to provide electrical connection between the resistors and other electronic components and ensure the stability and reliability of the circuit. Positive and negative detection of the resistance substrate helps to ensure the quality of the resistance substrate.

[0003] Through the search, such as the patent: CN111458353B, a resistance substrate positive and negative detection method, the maximum value and the minimum value of the interval of each two adjacent lines of the collected resistance substrate image are compared with the judgment threshold value D set in advance to judge whether there is a printing error. Without entering the template information of each substrate into the CCD detection system, the workload is reduced, and the applicability is wide.

[0004] Although the resistance substrate can be positively and negatively detected by using the CCD detection system at present, when the unqualified resistance substrate is identified, the system cannot automatically screen it out, and manual intervention is still needed for separation, which reduces the overall efficiency of the production line. SUMMARY

[0005] The purpose of the present application is to provide a resistance substrate positive and negative detection device and a detection method to solve the problems raised in the background.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme: a resistance substrate positive and negative detection device, comprising a first conveying structure, a detection frame is fixedly installed on one side of the first conveying structure, a CCD detection structure is fixedly installed at the bottom end of the detection frame, the CCD detection structure is arranged above the first conveying structure, a separation assembly is arranged at the top end of the first conveying structure, a first rotating shaft is installed in the first conveying structure, and a motor is installed at one end of the first rotating shaft.

[0007] The separation assembly comprises a cylinder arranged at the top end of the first conveying structure, a push plate is installed at the output end of the cylinder, the push plate is slidingly installed at the top end of the first conveying structure, a second conveying structure is arranged on one side of the first conveying structure, a third rotating shaft is installed in the second conveying structure, the third rotating shaft is arranged below the first rotating shaft, and a transmission assembly is arranged between the third rotating shaft and the first rotating shaft.

[0008] As a further technical scheme of the present application, the first conveying structure is fixedly installed with a guide plate on one side, the guide plate is arranged above the second conveying structure, and the side wall of the guide plate is provided with a turnover assembly.

[0009] As a further technical scheme of the present application, the turnover assembly comprises turnover plates arranged on the side wall of the guide plate, the turnover plates are uniformly arranged, a fourth rotating shaft is fixedly installed in the interior of each turnover plate, and the fourth rotating shaft is rotatably installed in the interior of the guide plate.

[0010] As a further technical scheme of the present application, a first torsional spring is installed on the outer wall of the fourth rotating shaft.

[0011] As a further technical scheme of the present application, the transmission assembly comprises a first belt pulley set arranged on the outer wall of the first rotating shaft, a second rotating shaft is embedded in the interior of the top end of the first belt pulley set, a first gear is fixedly installed on the outer wall of the second rotating shaft, a second gear is meshingly connected on one side of the first gear, and the second gear is fixedly installed on the outer wall of a third rotating shaft.

[0012] As a further technical scheme of the present application, a supporting plate is arranged below the turnover plate, two supporting plates are arranged, and the two supporting plates are slidably installed on the top end of the second conveying structure through a moving assembly.

[0013] As a further technical scheme of the present application, the moving assembly comprises a reciprocating screw rod embedded in the interior of the supporting plate, a third belt pulley set is installed on one end of the reciprocating screw rod, a seventh rotating shaft is installed in the interior of the top end of the third belt pulley set, a second belt pulley set is arranged on the outer wall of the seventh rotating shaft, a fifth rotating shaft is embedded in the interior of the end of the second belt pulley set away from the seventh rotating shaft, a rotating wheel is fixedly connected on the outer wall of the fifth rotating shaft, a tooth block is installed in the interior of the rotating wheel, the tooth blocks are uniformly arranged in an annular array, a rack plate is meshingly connected on the bottom end of the tooth blocks, and the rack plate is fixedly installed on the top end of a push plate.

[0014] As a further technical scheme of the present application, two threads are arranged on the outer wall of the reciprocating screw rod, and the directions of the two threads are opposite.

[0015] As a further technical scheme of the present application, the tooth block is rotatably installed in the interior of the rotating wheel through a sixth rotating shaft, and a second torsional spring is arranged on the outer wall of the sixth rotating shaft.

[0016] A detection method of a resistance substrate positive and negative detection device comprises the following steps:

[0017] S1: when the resistance substrate is detected, first, the resistance substrate to be detected is placed on the top end of the first conveying structure, and is conveyed to the side of the CCD detection structure through the first conveying structure, and is detected through the CCD detection structure, when the unqualified product is detected, the cylinder is started through the PLC control, the cylinder is started to drive the push plate to move to one side, and the unqualified resistance substrate is pushed to the top end of the second conveying structure, so that the qualified and unqualified resistance substrates are separated;

[0018] S2: the unqualified resistance substrate slides downward on the side wall of the guide plate, the resistance substrate contacts the turnover plate to drive the turnover plate to rotate downward, the top end of the fourth rotating shaft is turned out from the guide plate, the resistance substrate is pushed outward, which helps to turn over the resistance substrate placed upside down, and the turned over resistance substrate falls on the top end of the supporting plate;

[0019] S3: when the push plate pushes the resistance substrate away and resets, the movement of the push plate drives the movement of the rack plate, the rack plate is meshed with the gear block to drive the rotating wheel to rotate, the rotation of the rotating wheel drives the rotation of the fifth rotating shaft, the rotation of the fifth rotating shaft drives the rotation of the seventh rotating shaft through the second belt pulley set, the rotation of the seventh rotating shaft drives the rotation of the reciprocating screw rod through the third belt pulley set, and the rotation of the reciprocating screw rod drives the movement of the supporting plate, so that the two supporting plates move outward, and the resistance substrate on the top end falls on the top end of the second conveying structure and is conveyed away;

[0020] S4: when the first conveying structure is conveyed, the first rotating shaft is rotated through the first belt pulley set to drive the second rotating shaft to rotate, the rotation of the second rotating shaft drives the rotation of the first gear, the rotation of the first gear drives the rotation of the second gear, the rotation of the second gear drives the rotation of the third rotating shaft, and the rotation of the third rotating shaft drives the movement of the second conveying structure, so that the conveying direction of the second conveying structure is opposite to that of the conveying assembly of the first conveying structure, and the turned over resistance substrate is sent back to the original direction.

[0021] The beneficial effects of the present application are as follows:

[0022] The separation assembly is arranged, when the resistance substrate is detected, first, the resistance substrate to be detected is placed on the top end of the first conveying structure, and is conveyed to the side of the CCD detection structure through the first conveying structure, and is detected through the CCD detection structure, when the unqualified product is detected, the cylinder is started through the PLC control, the cylinder is started to drive the push plate to move to one side, and the unqualified resistance substrate is pushed to the top end of the second conveying structure, so that the qualified and unqualified resistance substrates are separated, manual intervention is reduced, and the overall production efficiency is improved.

[0023] The application is provided with a turnover assembly, when the resistance substrate slides on the side wall of the guide plate, the resistance substrate contacts the turnover plate and drives the turnover plate to rotate downward, the top end of the fourth rotating shaft is turned out from the guide plate, the resistance substrate is pushed outward, which helps to turn over the resistance substrate placed upside down and reduces subsequent manual intervention.

[0024] The application is provided with a moving assembly, when the push plate pushes the resistance substrate away and resets, the movement of the push plate drives the movement of the rack plate, the rack plate is engaged with the gear block to drive the rotating wheel to rotate when moving, the rotation of the rotating wheel drives the rotation of the fifth rotating shaft, the rotation of the fifth rotating shaft drives the rotation of the seventh rotating shaft through the second belt pulley set, the rotation of the seventh rotating shaft drives the rotation of the reciprocating lead screw through the third belt pulley set, the rotation of the reciprocating lead screw drives the movement of the supporting plate, so that the two supporting plates move outward to facilitate the resistance substrate at the top end to fall on the top end of the second conveying structure and be conveyed away. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the application;

[0026] Figure 2 It is a schematic diagram of the overall structure of the application;

[0027] Figure 3 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the overall structure of the application;

[0028] Figure 4 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the overall structure of the application;

[0029] Figure 5 It is a schematic diagram of the overall structure of the application;

[0030] Figure 6 It is a schematic diagram of the overall structure of the application;

[0031] Figure 7 It is a schematic diagram of the overall structure of the application.

[0032] In the figure: 1, first conveying structure; 2, detection frame; 3, CCD detection structure; 4, air cylinder; 5, push plate; 6, second conveying structure; 7, guide plate; 8, first rotating shaft; 9, motor; 10, first belt pulley set; 11, second rotating shaft; 12, first gear; 13, second gear; 14, third rotating shaft; 15, turnover plate; 16, fourth rotating shaft; 17, first torsional spring; 18, rack plate; 19, fifth rotating shaft; 20, rotating wheel; 21, gear block; 22, sixth rotating shaft; 23, second torsional spring; 24, second belt pulley set; 25, seventh rotating shaft; 26, third belt pulley set; 27, reciprocating lead screw; 28, supporting plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0034] As shown in the drawings, Figures 1 to 7 In the embodiments of the present application, a resistance substrate forward-backward detection device includes a first conveying structure 1, a detection frame 2 is fixedly installed on one side of the first conveying structure 1, a CCD detection structure 3 is fixedly installed at the bottom end of the detection frame 2, the CCD detection structure 3 is arranged above the first conveying structure 1, a separation assembly is arranged at the top end of the first conveying structure 1, a first rotating shaft 8 is installed in the first conveying structure 1, and a motor 9 is installed at one end of the first rotating shaft 8.

[0035] The separation assembly includes a cylinder 4 arranged at the top end of the first conveying structure 1, a push plate 5 is installed at the output end of the cylinder 4, the push plate 5 is slidingly installed at the top end of the first conveying structure 1, a second conveying structure 6 is arranged on one side of the first conveying structure 1, a third rotating shaft 14 is installed in the second conveying structure 6, the third rotating shaft 14 is arranged below the first rotating shaft 8, and a transmission assembly is arranged between the third rotating shaft 14 and the first rotating shaft 8.

[0036] The first conveying structure 1 and the second conveying structure 6 are both composed of a support frame, a belt and a belt pulley, each belt pulley in the first conveying structure 1 is rotationally connected through the first rotating shaft 8, the motor 9 is installed at the end of one of the first rotating shafts 8, the first rotating shaft 8 is driven to rotate by starting the motor 9, the first rotating shaft 8 drives the belt pulley to rotate, thereby driving the first conveying structure 1 to convey the resistance substrate.

[0037] When the resistance substrate is detected forward and backward, the resistance substrate to be detected is first placed at the top end of the first conveying structure 1, is conveyed to one side of the CCD detection structure 3 through the first conveying structure 1, and is detected by the CCD detection structure 3. When a defective product is detected, the cylinder 4 is started by PLC control, the cylinder 4 drives the push plate 5 to move to one side, and the defective resistance substrate is pushed to the top end of the second conveying structure 6, so that the qualified and unqualified resistance substrates are separated, manual intervention is reduced, and the overall production efficiency is improved.

[0038] As shown in the drawings, Figure 1 and Figure 2 One side of the first conveying structure 1 is fixedly installed with a guide plate 7, the guide plate 7 is arranged above the second conveying structure 6, and a turnover assembly is arranged on the side wall of the guide plate 7.

[0039] The guide plate 7 is inclined, which guides and buffers the ejected unqualified resistance substrate, prevents the resistance substrate from directly falling on the top end of the second conveying structure 6, and prevents the problem of damage caused by excessive impact.

[0040] As shown in Figure 4 and Figure 7 , the turnover assembly includes a turnover plate 15 arranged on the side wall of the guide plate 7, and the turnover plate 15 is uniformly arranged, and the inner part of each turnover plate 15 is fixedly installed with a fourth rotating shaft 16, and the fourth rotating shaft 16 is rotatably installed in the inner part of the guide plate 7.

[0041] When the resistance substrate slides on the side wall of the guide plate 7, the resistance substrate contacts the turnover plate 15 to drive the turnover plate 15 to rotate downward, so that the top end of the fourth rotating shaft 16 is turned out from the guide plate 7, and the resistance substrate is pushed outward, which helps to turn over the resistance substrate placed upside down and reduces subsequent manual intervention.

[0042] As shown in Figure 7 , the outer wall of the fourth rotating shaft 16 is installed with a first torsional spring 17.

[0043] When the resistance substrate drives the turnover plate 15 to rotate, the turnover plate 15 drives the fourth rotating shaft 16 to rotate, and the rotation of the fourth rotating shaft 16 deforms the first torsional spring 17 to store elastic potential energy. When the resistance substrate is separated from the turnover plate 15, the first torsional spring 17 releases the elastic potential energy to make the turnover plate 15 rotate and reset.

[0044] As shown in Figure 4 and Figure 5 , the transmission assembly includes a first pulley set 10 arranged on the outer wall of the first rotating shaft 8, the inner part of the top end of the first pulley set 10 is embedded with a second rotating shaft 11, the outer wall of the second rotating shaft 11 is fixedly installed with a first gear 12, one side of the first gear 12 is meshingly connected with a second gear 13, and the second gear 13 is fixedly installed on the outer wall of a third rotating shaft 14.

[0045] When the first rotating shaft 8 rotates, the second rotating shaft 11 is driven to rotate through the first pulley set 10, the rotation of the second rotating shaft 11 drives the rotation of the first gear 12, the rotation of the first gear 12 drives the rotation of the second gear 13, the rotation of the second gear 13 drives the rotation of the third rotating shaft 14, and the rotation of the third rotating shaft 14 drives the movement of the second conveying structure 6, so that the transmission direction of the second conveying structure 6 is opposite to the transmission assembly of the first conveying structure 1, and the resistance substrate after turning over is sent back to the original direction, which is convenient for re-detection.

[0046] As shown in Figure 4 and Figure 6As shown, the lower part of the turnover plate 15 is provided with a supporting plate 28, and the two supporting plates 28 are slidably installed at the top end of the second conveying structure 6 by a moving assembly.

[0047] When the resistance substrate is flipped and supported by the supporting plate 28, the impact force is dispersed, and the resistance substrate is prevented from being damaged by direct impact.

[0048] As shown in Figure 4 and Figure 6 The moving assembly includes a reciprocating screw rod 27 embedded in the inside of the supporting plate 28, one end of the reciprocating screw rod 27 is provided with a third pulley set 26, the inside of the top end of the third pulley set 26 is provided with a seventh rotating shaft 25, the outer wall of the seventh rotating shaft 25 is provided with a second pulley set 24, the inside of the end of the second pulley set 24 away from the seventh rotating shaft 25 is embedded with a fifth rotating shaft 19, the outer wall of the fifth rotating shaft 19 is fixedly connected with a rotating wheel 20, the inside of the rotating wheel 20 is provided with a tooth block 21, the tooth block 21 is arranged in an annular array, and the bottom end of the tooth block 21 is engagedly connected with a rack plate 18, and the rack plate 18 is fixedly installed at the top end of the push plate 5.

[0049] When the push plate 5 pushes the resistance substrate away and resets, the movement of the push plate 5 drives the movement of the rack plate 18, and when the rack plate 18 moves, the rack plate 18 is engaged with the tooth block 21 to drive the rotating wheel 20 to rotate, the rotation of the rotating wheel 20 drives the rotation of the fifth rotating shaft 19, the rotation of the fifth rotating shaft 19 drives the seventh rotating shaft 25 to rotate through the second pulley set 24, the seventh rotating shaft 25 rotates through the third pulley set 26 to drive the reciprocating screw rod 27 to rotate, and the reciprocating screw rod 27 rotates to drive the supporting plate 28 to move, so that the two supporting plates 28 move outward to facilitate the resistance substrate at the top end to fall on the top end of the second conveying structure 6 and be conveyed away.

[0050] As shown in Figure 4 and Figure 6 The outer wall of the reciprocating screw rod 27 is provided with two threads, and the directions of the two threads are opposite.

[0051] The two supporting plates 28 are relatively moved.

[0052] As shown in Figure 5 The tooth block 21 is rotatably installed in the inside of the rotating wheel 20 through a sixth rotating shaft 22, and the outer wall of the sixth rotating shaft 22 is provided with a second torsional spring 23.

[0053] When the push plate 5 pushes the resistance substrate away, the rack plate 18 pushes the tooth block 21 to rotate to the inside of the rotating wheel 20, and the rotating wheel 20 does not rotate, so that the supporting plate 28 is located below the turnover plate 15 to support the resistance substrate.

[0054] A detection method of a resistance substrate forward and reverse detection device, comprising the following steps:

[0055] S1: when detecting the resistance substrate, first place the resistance substrate to be detected on the top end of the first conveying structure 1, and then transmit it through the first conveying structure 1, and then convey it to one side of the CCD detection structure 3, and then detect it through the CCD detection structure 3, and then when detecting the unqualified product, start the air cylinder 4 through the PLC control, and then the air cylinder 4 drives the push plate 5 to move to one side, and then pushes the unqualified resistance substrate to the top end of the second conveying structure 6, so as to separate the qualified and unqualified resistance substrates;

[0056] S2: the unqualified resistance substrate slides downward along the side wall of the guide plate 7, and then the resistance substrate contacts the turnover plate 15 to drive the turnover plate 15 to rotate downward, so that the top end of the fourth rotating shaft 16 rotates out of the guide plate 7, and then the resistance substrate is pushed outward, which helps to turn over the resistance substrate placed upside down, and then the turned over resistance substrate falls on the top end of the supporting plate 28;

[0057] S3: when the push plate 5 pushes the resistance substrate away and resets, the movement of the push plate 5 drives the movement of the rack plate 18, and when the rack plate 18 moves, it meshes with the gear block 21 to drive the rotating wheel 20 to rotate, and the rotation of the rotating wheel 20 drives the rotation of the fifth rotating shaft 19, and the rotation of the fifth rotating shaft 19 drives the rotation of the seventh rotating shaft 25 through the second belt pulley set 24, and the rotation of the seventh rotating shaft 25 drives the rotation of the reciprocating lead screw 27 through the third belt pulley set 26, and the rotation of the reciprocating lead screw 27 drives the movement of the supporting plate 28, so that the two supporting plates 28 move outward to facilitate the resistance substrate on the top end to fall on the top end of the second conveying structure 6 and be transmitted away;

[0058] S4: when the first conveying structure 1 transmits, the first rotating shaft 8 rotates to drive the second rotating shaft 11 to rotate through the first belt pulley set 10, the rotation of the second rotating shaft 11 drives the rotation of the first gear 12, the rotation of the first gear 12 drives the rotation of the second gear 13, the rotation of the second gear 13 drives the rotation of the third rotating shaft 14, and the rotation of the third rotating shaft 14 drives the movement of the second conveying structure 6, so that the transmission direction of the second conveying structure 6 is opposite to the transmission assembly of the first conveying structure 1, and the turned over resistance substrate is sent back to the original direction.

[0059] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A resistance substrate front-back detection device, comprising a first conveying structure (1), characterized in that: The side of the first conveying structure (1) is fixedly provided with a detection frame (2), the bottom end of the detection frame (2) is fixedly provided with a CCD detection structure (3), the CCD detection structure (3) is arranged above the first conveying structure (1), the top end of the first conveying structure (1) is provided with a separation assembly, the inside of the first conveying structure (1) is provided with a first rotating shaft (8), one end of the first rotating shaft (8) is provided with a motor (9); The separation assembly comprises a cylinder (4) arranged at the top end of the first conveying structure (1), the output end of the cylinder (4) is provided with a push plate (5), the push plate (5) is slidingly arranged at the top end of the first conveying structure (1), one side of the first conveying structure (1) is provided with a second conveying structure (6), the inside of the second conveying structure (6) is provided with a third rotating shaft (14), the third rotating shaft (14) is arranged below the first rotating shaft (8), and a transmission assembly is arranged between the third rotating shaft (14) and the first rotating shaft (8); The side of the first conveying structure (1) is fixedly provided with a guide plate (7), the guide plate (7) is arranged above the second conveying structure (6), the side wall of the guide plate (7) is provided with a turnover assembly; the turnover assembly comprises turnover plates (15) arranged on the side wall of the guide plate (7), the turnover plates (15) are evenly arranged, the inside of each turnover plate (15) is fixedly provided with a fourth rotating shaft (16), and the fourth rotating shaft (16) is rotatably arranged in the inside of the guide plate (7); the bottom of the turnover plate (15) is provided with a supporting plate (28), the supporting plate (28) is provided with two, and the two supporting plates (28) are slidingly arranged at the top end of the second conveying structure (6) through a moving assembly; the moving assembly comprises a reciprocating screw rod (27) embedded in the inside of the supporting plate (28), one end of the reciprocating screw rod (27) is provided with a third belt pulley set (26), the inside of the top end of the third belt pulley set (26) is provided with a seventh rotating shaft (25), the outer wall of the seventh rotating shaft (25) is provided with a second belt pulley set (24), the inside of one end of the second belt pulley set (24) away from the seventh rotating shaft (25) is embedded with a fifth rotating shaft (19), the outer wall of the fifth rotating shaft (19) is fixedly connected with a rotating wheel (20), the inside of the rotating wheel (20) is provided with a tooth block (21), the tooth block (21) is arranged in an annular array and evenly arranged, the bottom end of the tooth block (21) is engagedly connected with a rack plate (18), and the rack plate (18) is fixedly arranged at the top end of the push plate (5).

2. The resistance substrate detecting device according to claim 1, wherein: The outer wall of the fourth rotating shaft (16) is provided with a first torsional spring (17).

3. The resistance substrate detecting device according to claim 2, wherein: The transmission assembly comprises a first pulley set (10) arranged on the outer wall of the first rotating shaft (8), the inner top of the first pulley set (10) is embedded with a second rotating shaft (11), the outer wall of the second rotating shaft (11) is fixedly provided with a first gear (12), one side of the first gear (12) is engagedly connected with a second gear (13), and the outer wall of the second gear (13) is fixedly provided with a third rotating shaft (14).

4. The resistance substrate detecting device according to claim 3, wherein: The outer wall of the reciprocating screw rod (27) is provided with two threads, and the directions of the two threads are opposite.

5. The resistance substrate detecting device according to claim 4, wherein: The tooth block (21) is rotatably arranged in the inner part of the rotating wheel (20) through a sixth rotating shaft (22), and the outer wall of the sixth rotating shaft (22) is provided with a second torsional spring (23).

6. A detection method of a resistance substrate front-rear detection device, the method being applied to the resistance substrate front-rear detection device according to claim 5, characterized in that, The method comprises the following steps: S1: when the resistance substrate is detected, first, the resistance substrate to be detected is placed on the top of the first conveying structure (1), and is conveyed to the side of the CCD detection structure (3) through the first conveying structure (1), and is detected through the CCD detection structure (3), when the unqualified product is detected, the air cylinder (4) is started through the PLC control, the air cylinder (4) drives the push plate (5) to move to one side, and the unqualified resistance substrate is pushed to the top of the second conveying structure (6), so that the qualified and unqualified resistance substrates are separated; S2: the unqualified resistance substrate slides downward on the side wall of the guide plate (7), the resistance substrate contacts the turnover plate (15) to drive the turnover plate (15) to rotate downward, the top of the fourth rotating shaft (16) is turned out from the guide plate (7), the resistance substrate is pushed outward, which helps to turn over the resistance substrate placed upside down, and the turned over resistance substrate falls on the top of the supporting plate (28); S3: when the push plate (5) pushes away the resistance substrate and resets, the movement of the push plate (5) drives the movement of the rack plate (18), the rack plate (18) is engaged with the tooth block (21) to drive the rotating wheel (20) to rotate, the rotation of the rotating wheel (20) drives the rotation of the fifth rotating shaft (19), the rotation of the fifth rotating shaft (19) drives the rotation of the seventh rotating shaft (25) through the second pulley set (24), the rotation of the seventh rotating shaft (25) drives the rotation of the reciprocating screw rod (27) through the third pulley set (26), and the rotation of the reciprocating screw rod (27) drives the movement of the supporting plate (28), so that the two supporting plates (28) move outward to facilitate the resistance substrate on the top to fall on the top of the second conveying structure (6) for transmission; S4: when the first conveying structure (1) transmits, the first rotating shaft (8) rotates to drive the second rotating shaft (11) to rotate through the first pulley set (10), the rotation of the second rotating shaft (11) drives the rotation of the first gear (12), the rotation of the first gear (12) drives the rotation of the second gear (13), the rotation of the second gear (13) drives the rotation of the third rotating shaft (14), and the rotation of the third rotating shaft (14) drives the movement of the second conveying structure (6), so that the transmission direction of the second conveying structure (6) is opposite to that of the transmission assembly of the first conveying structure (1), and the turned over resistance substrate is sent back to the original direction.

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