An electronic board testing device

Abstract

This utility model relates to the technical field of product testing equipment, specifically to an electronic board testing device, comprising: a base with a first groove on its upper surface, within which several roller conveying devices are arranged side-by-side; an image detection stage and a circuit detection stage, fixed side-by-side on the same side of the base and respectively located directly above the roller conveying devices; two conveyor belts, each fixed on the same side of the base; and a positioning component, the lower part of which is connected to the inner bottom surface of the first groove, the upper part of which passes through the space between adjacent roller conveying devices. This utility model achieves integrated automation of electronic board fixing, conveying, image detection, circuit detection, and classification, changing the traditional manual testing method, greatly improving testing efficiency, and significantly saving testing time.

Description

Technical Field

[0001] This utility model relates to the field of product testing equipment technology, and more specifically, to an electronic board testing device. Background Technology

[0002] Electronic boards, also known as printed circuit boards or PCBs, are widely used in various power electronics industries, hence the market demand for electronic boards is very large.

[0003] Currently, electronic boards are mass-produced. Before leaving the factory, the appearance and circuit of each circuit board need to be inspected to prevent unqualified products from entering the market. At present, most of the appearance inspection and circuit inspection of electronic boards are carried out manually. After an electronic board is inspected, qualified and unqualified products need to be classified. This undoubtedly requires a lot of manpower and has low inspection efficiency.

[0004] Therefore, the existing technology has the following defects: the appearance inspection and circuit inspection of electronic boards cannot be carried out simultaneously, defective products cannot be rejected after the inspection is completed, and the circuit boards are prone to displacement during the inspection process. Utility Model Content

[0005] In view of this, this utility model proposes an electronic board testing device to address the shortcomings of the existing technology and solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An electronic board testing device, comprising,

[0008] The base has a first groove on its upper surface. Several roller conveying devices are arranged side by side in the first groove. The roller conveying devices are used to drive the electronic board to move in the groove.

[0009] An image detection station and a circuit detection station are fixed side by side on the same side of the base and are respectively located directly above the roller conveyor. The image detection station can perform image detection on the electronic board on the roller conveyor, and the circuit detection station can perform circuit detection on the electronic board on the roller conveyor.

[0010] Two conveyor belt conveying devices are provided, which are fixed on the same side of the base and located between adjacent roller conveying devices. The two conveyor belt conveying devices are located directly below the image detection station and the circuit detection station, respectively, for removing the electronic board from the roller conveying device.

[0011] A positioning component, the lower part of which is connected to the inner bottom surface of the first groove, and the upper part of which is inserted between adjacent roller conveying devices, is used to clamp the electronic board that enters the roller conveying device to position the electronic board on the roller conveying device.

[0012] To ensure the horizontal transport of the electronic board, the present invention includes the following improvements: the roller conveying device comprises rollers, protrusions, and a roller control motor. The rollers are fixed in the first groove. Multiple rollers are arranged in a horizontal array with gaps between adjacent rollers. Adjacent rollers are connected by gears and can rotate synchronously to move the electronic board placed on the rollers. Several protrusions are provided on the outer surface of the rollers to protect the electronic board placed on the rollers. The roller control motor is located on the side wall of the base to drive the rollers.

[0013] Furthermore, an improvement of this utility model is that the outer surface of the protrusion is covered with a soft material layer, such as silicone or sponge, to enhance the protection of the electronic board placed on the roller and to prevent the electronic board from shifting its position when moving and detecting on the roller.

[0014] To facilitate the inspection of the appearance of electronic boards, the present invention includes the following improvements: the image inspection stage includes a first motor, a camera, LED lights, a first telescopic rod, and a first support plate. The first motor is fixed to the upper surface of the first support plate. The first telescopic rod passes through the upper panel of the first support plate and is connected to the first motor, allowing it to extend and retract under the drive of the first motor. The camera is connected to the lower end of the first telescopic rod and is located directly above the gap between adjacent rollers, enabling image inspection of electronic boards that have moved directly below the camera. The LED lights are arranged circumferentially on the lower surface of the first telescopic rod for illumination during image inspection.

[0015] When the electronic board is directly below the camera, the roller stops rolling. During the extension of the first telescopic rod, the camera completes focusing and image acquisition of the electronic board, and detects the acquired image. In dim ambient light, the LED light can be turned on for illumination.

[0016] To facilitate circuit testing of electronic boards, this invention includes an improved circuit testing platform comprising a second motor, a testing probe, a second telescopic rod, a probe assembly panel, and a second support plate. The second motor is fixed to the upper surface of the second support plate. The second telescopic rod passes through the upper panel of the second support plate and is connected to the second motor, allowing it to extend and retract under the drive of the second motor. The upper surface of the probe assembly panel is connected to the lower end of the second telescopic rod and is located directly above the roller. The probe is positioned on the lower surface of the probe assembly panel, enabling circuit testing of electronic boards moved directly below the probe.

[0017] When the electronic board is directly below the probe assembly panel, the rollers stop rolling, and the probe assembly panel moves downward during the extension of the second telescopic rod, so that the probes make close contact with the detection points of the electronic board, thus completing the circuit detection of the electronic board.

[0018] To remove defective electronic boards, this invention includes an improved conveyor belt device comprising a conveyor belt control motor, several second grooves, several conveyor belts, a conveyor platform, driven wheels, and a driving wheel. The second grooves are located on the upper surface of the conveyor platform. The conveyor belt control motor is located on the outer surface of the side wall of the conveyor platform and is connected to the driving wheel located inside the conveyor platform, driving the driving wheel. The driving wheel is connected to the driven wheel fixed inside the base via the conveyor belt, and can drive the conveyor belt to rotate under the drive of the conveyor belt control motor. The conveyor belt is located on the upper surface of the second grooves, between the gaps of adjacent rollers, and directly below the camera and the detection probe. The height of the conveyor belt is flush with the rollers, allowing for the movement of electronic boards that fail image and circuit detection tests.

[0019] If the test result is unqualified, the conveyor belt control motor starts, driving the drive wheel to rotate the conveyor belt, thereby moving the unqualified electronic board to the unqualified product area.

[0020] To ensure the electronic board is positioned correctly when placed on the roller conveyor, the present invention includes the following improvements: the positioning device comprises a clamping column, a positioning controller, a protrusion, several third grooves, and a base plate. The third grooves are located on the upper surface of the base plate. The clamping column is upright inside the third groove and passes through the gap between adjacent rollers. The protrusion is fixed to the outer surface of the clamping column and contacts but does not connect with the upper surface of the base plate, thereby enhancing the stability of the clamping column during movement. The positioning controller is fixed to the outer surface of the side wall of the base and can drive the clamping column to move within the third grooves to fix the position of the electronic board placed on the rollers.

[0021] Furthermore, an improvement of this utility model is that a flexible material layer, such as silicone, sponge, soft plastic, or foam, is provided on the outer surface of the clamping column, which can enhance the protection of the electronic board when clamping it.

[0022] Furthermore, the improvements of this utility model include that the conveyor belt control motor, the first motor, the second motor, and the roller control motor are all servo motors, and the first telescopic rod and the second telescopic rod are both cylinders.

[0023] To ensure that the roller conveyor, the conveyor belt conveyor, the image detection station, the circuit detection station, and the positioning component can work together, the improvement of this utility model is that the roller conveyor, the image detection station, the circuit detection station, the conveyor belt conveyor, and the positioning device are all connected through a central controller to work together.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] First, it can perform both appearance and circuit testing on electronic boards on the same device, and ensure that the position of the electronic boards does not change during the testing process. It can classify qualified and unqualified products. This process does not require manual intervention, saving labor and improving testing efficiency.

[0026] Second, the positioning device can position the electronic board that is newly entering the roller conveyor. With the help of the silicone particles on the roller, the electronic board is kept in the center of the roller after entering the roller conveyor, which simplifies the positioning device and the workflow and saves time.

[0027] Third, the positioning device can locate electronic boards of different models, and both the image detection component and the circuit detection component can detect electronic boards of different models, making it highly applicable. Attached Figure Description

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0029] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this utility model;

[0030] Figure 2 A front view provided for an embodiment of this utility model;

[0031] Figure 3 Rear view provided for an embodiment of this utility model;

[0032] Figure 4 Cross-sectional view provided for an embodiment of this utility model;

[0033] Figure 5 for Figure 2 The cross-sectional view at point A is a schematic diagram of the conveyor belt provided in an embodiment of this utility model.

[0034] The components are as follows: 100, base; 101, first groove; 200, roller conveying device; 201, roller; 202, protrusion; 203, roller control motor; 300, image detection stage; 301, first motor; 302, camera; 303, LED light; 304, first telescopic rod; 305, first support plate; 400, circuit detection stage; 401, second motor; 402, detection probe; 403, second telescopic rod; 404, probe group panel; 405, second support plate; 500, conveyor belt conveying device; 501, conveyor belt control motor; 502, second groove; 503, several conveyor belts; 504, conveyor table; 505, driven wheel; 506, driving wheel; 600, positioning assembly; 601, clamping column; 602, positioning controller; 603, protrusion; 604, third groove; 605, base plate; 700, central controller. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] Please see Figures 1-5 This utility model discloses an electronic board testing device, comprising,

[0040] The base 100 has a first groove 101 on its upper surface. Several roller conveying devices 200 are arranged side by side in the first groove 101. The roller conveying devices 200 are used to drive the electronic board to move in the groove.

[0041] The image detection stage 300 and the circuit detection stage 400 are fixed side by side on the same side of the base 100 and are respectively located directly above the roller conveyor 200 to perform image detection and circuit detection on the electronic board on the roller conveyor 200.

[0042] Two conveyor belt conveyors 500 are provided, which are fixed on the same side of the base 100 and located between adjacent roller conveyors 200. The two conveyor belt conveyors 500 are located directly below the image detection stage 300 and the circuit detection stage 400, respectively, for removing the electronic board from the roller conveyor 200.

[0043] The positioning component 600 has its lower part connected to the inner bottom surface of the first groove 101, and its upper part is inserted between adjacent roller conveying devices 200. The upper part of the positioning component 600 is used to clamp the electronic board that enters the roller conveying device 200 to position the electronic board on the roller conveying device 200.

[0044] The roller conveying device 200 includes rollers 201, protrusions 202, and roller control motor 203. The rollers 201 are fixed in the first groove 101. Multiple rollers 201 are arranged in a horizontal array with gaps between adjacent rollers 201. Adjacent rollers 201 are connected by gears and can rotate synchronously to move the electronic board placed on the rollers 201. Several protrusions 202 are arranged on the outer surface of the rollers 201 to protect the electronic board placed on the rollers 201. The roller control motor 203 is located on the side wall of the base 1 to drive the rollers 201.

[0045] The bump 202 is covered with a soft material layer, such as silicone or sponge, to enhance the protection of the electronic board placed on the roller 201 and to prevent the electronic board from shifting its position when moving on the roller 201 and during detection.

[0046] The image detection stage 300 includes a first motor 301, a camera 302, an LED light 303, a first telescopic rod 304, and a first support plate 305. The first motor 301 is fixed to the upper surface of the first support plate 305. The first telescopic rod 304 passes through the upper panel of the first support plate 305 and is connected to the first motor 301, allowing it to extend and retract under the drive of the first motor 301. The camera is connected to the lower end of the first telescopic rod 304 and is located directly above the gap between adjacent rollers 201, enabling image detection of an electronic board that has moved directly below the camera 302. The LED lights 303 are arranged circumferentially on the lower surface of the first telescopic rod 304 for illumination during image detection.

[0047] The circuit testing platform 400 includes a second motor 401, a testing probe 402, a second telescopic rod 403, a probe assembly panel 404, and a second support plate 405. The second motor 401 is fixed to the upper surface of the second support plate 405. The second telescopic rod 403 passes through the upper panel of the second support plate 405 and is connected to the second motor 401, allowing it to extend and retract under the drive of the second motor 401. The upper surface of the probe assembly panel 404 is connected to the lower end of the second telescopic rod 403 and is located directly above the roller 201. The probe 402 is disposed on the lower surface of the probe assembly panel 404 and can perform circuit testing on electronic boards that have moved directly below the probe 402.

[0048] The conveyor belt conveying device 500 includes a conveyor belt control motor 501, a plurality of second grooves 502, a plurality of conveyor belts 503, a conveyor platform 504, driven wheels 505, and a driving wheel 506. The second grooves 502 are located on the upper surface of the conveyor platform 504. The conveyor belt control motor 501 is located on the outer surface of the side wall of the conveyor platform 504 and is connected to the driving wheel 506 disposed inside the conveyor platform 504, thereby driving the driving wheel 506. The driving wheel 506 is connected to the conveyor belts 503. 03 is connected to the driven wheel 505 fixed inside the base 1, and can drive the conveyor belt 503 to rotate under the drive of the conveyor belt control motor 501. The conveyor belt 503 is disposed on the upper surface of the second groove 502, and also disposed between the gaps of adjacent rollers 201 and directly below the camera 302 and the detection probe 402. The height of the conveyor belt 503 is flush with the rollers 201, and can move the electronic board that fails the image detection and circuit detection.

[0049] The positioning device 600 includes a clamping column 601, a positioning controller 602, a protrusion 603, several third grooves 604, and a base plate 605. The third grooves 605 are located on the upper surface of the base plate 605. The clamping column 601 is erected inside the third groove 605 and passes through the gap between adjacent rollers 201. The protrusion 603 is fixed to the outer surface of the clamping column 601 and contacts but does not connect with the upper surface of the base plate 605, which can enhance the stability of the clamping column 601 when it moves. The positioning controller 602 is fixed to the outer surface of the side wall of the base 100 and can drive the clamping column 601 to move within the third grooves 604 to fix the position of the electronic board placed on the rollers 201.

[0050] The outer surface of the clamping column 601 is provided with a flexible material layer, such as silicone, sponge, soft plastic, foam, etc., which can enhance the protection of the electronic board when clamping it.

[0051] The conveyor belt control motor 501, the first motor 301, the second motor 401, and the roller control motor 203 are all servo motors, and the first telescopic rod 304 and the second telescopic rod 403 are both cylinders.

[0052] The roller conveyor 200, the image detection station 300, the circuit detection station 400, the conveyor belt conveyor 500, and the positioning device 600 are all connected through the central controller 700 and work together.

[0053] In operation, the completed electronic board is first placed on the roller 201 and directly above the positioning component 600. At this time, the clamping column 601 retracts inward, positioning the electronic board in the center of the roller 201. Then, the clamping column 601 returns to its original position, and the roller control motor 203 starts, causing the roller 201 to rotate and move the electronic board forward. When the electronic board moves directly below the camera 302 and to the center of the conveyor belt 503, the roller control motor 203 stops, and the roller 201 stops rotating. At this point, the first telescopic rod 304, driven by the first motor 301, moves the camera downward to a preset position, begins focusing, and completes image acquisition and detection of the electronic board. If the detection fails, the conveyor belt control motor 501 drives several conveyor belts 503 below the camera 302 to rotate, thus moving the electronic board into the defective product area for further processing by staff. If the test passes, the roller control motor 203 starts working, and the roller 201 starts rotating, causing the electronic board to continue moving forward. When the electronic board moves directly below the probe group panel 404, the roller control motor 203 stops working, and the roller 201 stops rotating. At this time, the second telescopic rod 403, driven by the second control motor 401, drives the probe group panel 404 downward. When the detection probe 402 and the detection point of the electronic board are in close contact, the second control motor 401 stops working, and the detection probe completes the circuit test of the electronic board. If the test fails, the conveyor belt control motor 501 drives several conveyor belts 503 below the probe group panel 404 to start rotating, thereby moving the electronic board into the defective product area for further processing by the staff. If the test passes, the roller control motor 203 starts working, and the roller 201 starts rotating, causing the electronic board to continue moving forward into the qualified product area.

[0054] When this utility model is in operation, the roller conveyor 200, the fixing component 600, the conveyor belt conveyor 500, the image detection component 300, and the circuit detection component 400 are controlled by the central controller 700. This allows the fixing component 600 to fix the electronic board, the image detection component 300 to detect the image of the electronic board, and the circuit detection component 400 to detect the circuit of the electronic board to be performed simultaneously. The roller conveyor 200 and the conveyor belt conveyor 500 also move the electronic board simultaneously, so that the workflow can proceed in an orderly manner.

[0055] The bump 202 is covered with a soft material layer, such as silicone or sponge, to enhance the protection of the electronic board placed on the roller 201 and to prevent the electronic board from shifting its position when moving on the roller 201 and during detection.

[0056] The bump 202 serves two purposes: firstly, it provides anti-slip properties, improving the stability of the electronic board as it moves on the roller 201, and also acts as a buffer for the circuit board when the detection probe 402 detects the electronic board; secondly, it protects the electronic components on the electronic board as it moves on the roller 201.

[0057] LED 403 can provide illumination in low ambient light conditions to improve the accuracy of image detection.

[0058] The camera 302 can move up and down under the drive of the first telescopic rod 304, and can perform image detection on different types of circuit boards. Multiple detection probes 402 are set to perform circuit detection on different types of circuit boards. The clamping column 601 can fix different types of circuit boards. Therefore, this utility model has wide applicability.

[0059] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An electronic board inspection apparatus characterized by comprising: include: The base (100) has a first groove (101) on its upper surface. Several roller conveying devices (200) are arranged side by side in the first groove (101). The roller conveying devices (200) are used to drive the electronic board to move in the groove. An image detection stage (300) and a circuit detection stage (400) are fixed side by side on the same side of the base (100) and are respectively located directly above the roller conveyor (200). The image detection stage (300) can perform image detection on the electronic board on the roller conveyor (200), and the circuit detection stage (400) can perform circuit detection on the electronic board on the roller conveyor (200). Two conveyor belt conveyors (500) are provided, which are fixed on the same side of the base (100) and located between adjacent roller conveyors (200). The two conveyor belt conveyors (500) are located directly below the image detection stage (300) and the circuit detection stage (400), respectively, for removing the electronic board from the roller conveyor (200). A positioning component (600) is provided, the lower part of which is connected to the inner bottom surface of the first groove (101). The upper part of the positioning component (600) is inserted between adjacent roller conveying devices (200). The upper part of the positioning component (600) is used to clamp the electronic board that enters the roller conveying device (200) to position the electronic board on the roller conveying device (200).

2. The electronic board testing device according to claim 1, characterized in that, The roller conveying device (200) includes rollers (201), protrusions (202), and roller control motor (203). The rollers (201) are fixed in the first groove (101). The rollers (201) are arranged in a horizontal array with gaps between adjacent rollers (201). The adjacent rollers (201) are connected by gears and can rotate synchronously to move the electronic board placed on the rollers (201). The protrusions (202) are arranged in a plurality and laid on the outer surface of the rollers (201) to protect the electronic board placed on the rollers (201). The roller control motor (203) is arranged on the side wall of the base (100) to drive the rollers (201).

3. The electronic board testing device according to claim 2, characterized in that, The bump (202) has a soft material layer on its surface to enhance the protection of the electronic board placed on the roller (201) and to prevent the electronic board from shifting its position when moving and detecting on the roller (201).

4. The electronic board testing device according to claim 3, characterized in that The image detection stage (300) includes a first motor (301), a camera (302), an LED light (303), a first telescopic rod (304), and a first support plate (305). The first motor (301) is fixed to the upper surface of the first support plate (305). The first telescopic rod (304) passes through the upper panel of the first support plate (305) and is connected to the first motor (301), and can extend and retract under the drive of the first motor (301). The camera is connected to the lower end of the first telescopic rod (304) and is located directly above the gap between adjacent rollers (201), and can perform image detection on the electronic board that moves directly below the camera (302). The LED light (303) is arranged circumferentially on the lower surface of the first telescopic rod (304) for illumination during image detection.

5. The electronic board testing device according to claim 4, characterized in that, The circuit testing station (400) includes a second motor (401), a testing probe (402), a second telescopic rod (403), a probe assembly panel (404), and a second support plate (405). The second motor (401) is fixed to the upper surface of the second support plate (405). The second telescopic rod (403) passes through the upper panel of the second support plate (405) and is connected to the second motor (401), and can extend and retract under the drive of the second motor (401). The upper surface of the probe assembly panel (404) is connected to the lower end of the second telescopic rod (403) and is located directly above the roller (201). The probe (402) is set on the lower surface of the probe assembly panel (404) and can perform circuit testing on the electronic board that moves directly below the probe (402).

6. The electronic board testing device according to claim 5, characterized in that, The conveyor belt conveying device (500) includes a conveyor belt control motor (501), a plurality of second grooves (502), a plurality of conveyor belts (503), a conveyor table (504), a driven wheel (505), and a driving wheel (506). The second grooves (502) are located on the upper surface of the conveyor table (504). The conveyor belt control motor (501) is located on the outer surface of the side wall of the conveyor table (504) and is connected to the driving wheel (506) disposed inside the conveyor table (504), which can drive the driving wheel (506). The driving wheel (506) is connected to the conveyor belt via the conveyor belt control motor (501). The belt (503) is connected to the driven wheel (505) fixed inside the base (100), and can drive the conveyor belt (503) to rotate under the drive of the conveyor belt control motor (501). The conveyor belt (503) is set on the upper surface of the second groove (502), and is also set between the gaps of the adjacent rollers (201) and directly below the camera (302) and the detection probe (402). The height of the conveyor belt (503) is flush with the rollers (201), and can move the electronic board that fails the image detection and circuit detection.

7. The electronic board testing device according to claim 6, characterized in that, The positioning component (600) includes a clamping column (601), a positioning controller (602), a protrusion (603), several third grooves (604), and a base plate (605). The third grooves (604) are located on the upper surface of the base plate (605). The clamping column (601) is upright inside the third groove (604) and passes through the gap between adjacent rollers (201). The protrusion (603) is fixed to the outer surface of the clamping column (601) and contacts but does not connect with the upper surface of the base plate (605), which can enhance the stability of the clamping column (601) when it moves. The positioning controller (602) is fixed to the outer surface of the side wall of the base (100) and can drive the clamping column (601) to move in the third groove (604) to fix the position of the electronic board placed on the roller (201).

8. The electronic board testing device according to claim 7, characterized in that, The outer surface of the clamping column (601) is provided with a flexible material layer, which can enhance the protection of the electronic board when clamping it.

9. The electronic board testing device according to claim 8, characterized in that, The conveyor belt control motor (501), the first motor (301), the second motor (401), and the roller control motor (203) are all servo motors, and the first telescopic rod (304) and the second telescopic rod (403) are both cylinders.

10. The electronic board testing device according to claim 1, characterized in that, The roller conveying device (200), the image detection table (300), the circuit detection table (400), the conveying belt conveying device (500) and the positioning assembly (600) are connected through a central controller (700) to work cooperatively.

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