PCB marking positioning system and method based on machine vision

Abstract

The invention discloses a PCB marking positioning system based on machine vision, and the system comprises an image collection assembly which is used for collecting image information in a visual field and outputting a control command according to the image information; the bearing plate is arranged on the marking machine and located below the image acquisition assembly, and the bearing plate is used for bearing the circuit board placed on the bearing plate so that the circuit board can be located in the visual field of the image acquisition assembly; the four push plates are movably arranged on the bearing plate and located on the four sides of the bearing plate correspondingly, and all the push plates work independently; the invention also provides a positioning method. According to the invention, a machine vision automatic matching mode is adopted, the image acquisition assembly is arranged to acquire the information of the circuit board on the bearing plate to automatically match the information of the preset circuit board, and corresponding control commands are output to control the four push plates to independently act on the bearing plate, so that the circuit board is clamped and pushed to a preset position in the information of the preset circuit board; and automatic identification and automatic positioning marking of circuit boards of multiple specifications are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board production, and in particular to a PCB marking positioning system and a positioning method based on machine vision. Background Art

[0002] PCB marking is to use laser to mark the circuit board, and the marking content includes production batch, date, serial number, etc. PCB marking requires a laser marking machine for marking. A marking positioning system is usually set up in the working area to position the circuit board so that the area to be marked on the circuit board is directly below the laser head.

[0003] At present, the commonly used marking positioning system usually adopts the method of setting specification clamping positioning, that is, the specifications of the circuit board are set before positioning the circuit board, and the positioning system automatically retracts or moves the preset distance according to the set data, and clamps and positions the circuit board placed in the laser marking machine for marking. Although this method of setting specification clamping positioning can perform automatic marking, this method requires inputting the corresponding circuit board information or selecting the corresponding circuit board information every time the circuit board is replaced. For the mixed production of multiple circuit boards on the production line, this method requires setting the circuit board information to be marked in advance, which makes it difficult to achieve mixed marking, thereby affecting the production efficiency of the circuit board.

[0004] Therefore, the existing method of clamping and positioning by setting specifications is difficult to carry out mixed marking production of multiple circuit boards because the preset information needs to be modified each time the type of circuit board is changed, making it difficult to adapt a single system to a mixed production line and save costs. Summary of the invention

[0005] The purpose of the present invention is to provide a PCB marking positioning system and positioning method based on machine vision to solve the technical problem in the prior art that it is difficult to carry out mixed marking production of multiple circuit boards because the preset information needs to be modified each time the type of circuit board is changed.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A PCB marking positioning system based on machine vision, comprising:

[0008] An image acquisition component, which is arranged on the marking machine and is used to acquire image information within the field of view and output a control command according to the image information;

[0009] A supporting plate, which is arranged on the marking machine and is located below the image acquisition component, and is used to support the circuit board placed thereon so that it is located within the field of view of the image acquisition component;

[0010] Four push plates, the four push plates are movably arranged on the support plate and are respectively located on four sides of the support plate, and each push plate works independently;

[0011] Among them, the image acquisition component presets multiple circuit board information. After the image acquisition component captures the circuit board on the support plate, it automatically matches the preset circuit board information and sends a control command according to the corresponding preset circuit board information. The four push plates move the corresponding distance according to the control command to push and clamp the circuit board to be positioned directly below the laser head of the marking machine.

[0012] As a preferred solution of the present invention, four push rods are arranged on the support plate, and the four push rods are arranged on four sides of the support plate, and the movable end of each push rod is connected to the push plate to push or pull the push plate;

[0013] The push plate is movably mounted on the movable end of the push rod, and the push plate can adjust the connection point between the push plate and the push rod according to a control command to adjust the clamping position of the push plate.

[0014] As a preferred solution of the present invention, a slide groove is provided on one side of the push plate close to the push rod, a tooth surface is formed at the bottom of the slide groove, and guide grooves are provided on both side walls of the slide groove;

[0015] A fixed block is arranged on the movable end of the push rod, the fixed block is slidably installed in the slide groove, a motor and a gear are arranged on the fixed block, the gear is rotatably embedded in the bottom of the fixed block and is installed in cooperation with the tooth surface;

[0016] Guide bars are arranged on both sides of the fixed block, and the guide bars are slidably installed in the guide grooves;

[0017] Wherein, the shaft of the motor is transmission-connected to the shaft of the gear to drive the gear to rotate forward or reverse.

[0018] As a preferred solution of the present invention, a frame body is arranged outside the supporting plate, a fixed shaft is arranged in the center of the bottom of the supporting plate, a spoke bracket is rotatably arranged on the fixed shaft, and the outer ends of the spoke brackets are fixed on the frame body, so that the frame body can rotate around the supporting plate;

[0019] The fixed ends of the four push rods are respectively fixed on four sides of the frame body, and the directions of the four push rods can be adjusted by rotating the frame body.

[0020] As a preferred solution of the present invention, four linear slides are arranged on the outside of the frame body, the four linear slides are arranged on four sides of the frame body, and the fixed ends of the four push rods are respectively fixed on the sliders of the four linear slides.

[0021] As a preferred solution of the present invention, a card slot is provided on one side of the push plate toward the central area of ​​the supporting plate, the card slot is close to the bottom edge of the push plate, and the card slot and the bottom edge of the push plate form a wedge surface, and the wedge surface guides the circuit board to move up when the push plate clamps the circuit board to lift the circuit board off the supporting plate.

[0022] As a preferred solution of the present invention, the side wall of the push plate below the slot protrudes toward the central area of ​​the support plate to form a front shovel, and the wedge surface extends to the end of the front shovel.

[0023] As a preferred solution of the present invention, the image acquisition component includes a main control computer and a camera component, the camera component is located above the supporting plate and faces the supporting plate, and the main control computer establishes a communication connection with the camera component to receive image information collected by the camera component;

[0024] The circuit board information is preset in the main control machine, and the circuit board information includes the model and location of the circuit board. The main control machine sends a control command according to the circuit board information.

[0025] As a preferred solution of the present invention, the camera assembly includes a first lens and a second lens, and the first lens and the second lens are respectively arranged on both sides of the laser head of the marking machine to form a binocular vision positioning architecture.

[0026] In order to solve the above technical problems, the present invention further provides the following technical solutions:

[0027] A positioning method using the above-mentioned PCB marking positioning system based on machine vision comprises the following steps:

[0028] Step 100: After the circuit board is freely placed on the support plate, the image acquisition component acquires information of the circuit board, wherein the circuit board information includes model and location;

[0029] Step 200: After the image acquisition component obtains the specifications and marking position of the circuit board according to the collected circuit board model and the preset circuit board information, it sends a control command;

[0030] Step 300: The four push plates move a corresponding distance on the support plate according to the control command, push and clamp the circuit board, and position the circuit board so that the marking position of the circuit board is directly below the laser head of the marking machine.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention adopts a machine vision automatic matching method. By setting an image acquisition component to collect circuit board information on the support plate, it automatically matches the preset circuit board information, and outputs corresponding control commands to control four push plates to move independently on the support plate, thereby clamping and pushing the circuit board to the preset position in the preset circuit board information, thereby realizing automatic identification and automatic positioning marking of circuit boards of multiple specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0034] Figure 1 A schematic diagram of the structure of a PCB marking and positioning system based on machine vision provided in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the structure of the frame body of a PCB marking and positioning system based on machine vision provided in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the structure of the push plate portion of the machine vision-based PCB marking and positioning system provided in an embodiment of the present invention;

[0037] Figure 4 A schematic structural diagram of the front shovel portion of a machine vision-based PCB marking and positioning system provided in an embodiment of the present invention.

[0038] The numbers in the figure represent the following:

[0039] 1-image acquisition component; 2-supporting plate; 3-push plate;

[0040] 11-main control machine; 12-camera assembly; 21-push rod; 22-fixed block; 23-frame body; 24-fixed axis; 31-slideway; 32-card slot;

[0041] 121-first lens; 122-second lens; 221-gear; 222-guide bar; 231-linear slide; 241-spoke bracket; 311-tooth surface; 312-guide groove; 321-wedge surface; 322-front shovel. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figure 1 As shown, the present invention provides a PCB marking and positioning system based on machine vision, comprising:

[0044] An image acquisition component 1 is arranged on the marking machine and is used to acquire image information within the field of view and output control commands according to the image information;

[0045] A supporting plate 2, which is arranged on the marking machine and is located below the image acquisition component 1, and is used to support the circuit board placed thereon so that it is located within the field of view of the image acquisition component 1;

[0046] Four push plates 3, which are movably arranged on the supporting plate 2 and are respectively located on four sides of the supporting plate 2, and each push plate 3 works independently;

[0047] Among them, the image acquisition component 1 presets multiple circuit board information. After the image acquisition component 1 captures the circuit board on the supporting plate 2, it automatically matches the preset circuit board information and sends a control command according to the corresponding preset circuit board information. The four push plates 3 move the corresponding distance according to the control command to push and clamp the circuit board to be positioned directly below the laser head of the marking machine.

[0048] The machine vision-based PCB marking and positioning system of this embodiment mainly utilizes the image acquisition component 1 to collect the circuit board information on the support plate 2, so as to match it with the circuit board information preset in the image acquisition component 1, and sends control commands based on the matched circuit board information to control the movement of the four push plates 3. The four push plates 3 work independently on the support plate 2 to push the four sides of the circuit board to the position where the circuit board information matches, that is, the area to be marked on the circuit board can be moved to the bottom of the laser head of the marking machine for precise marking.

[0049] Compared with the existing PCB marking and positioning system, the present invention adopts a machine vision processing method, uses the image acquisition component 1 to directly obtain the circuit board information on the support plate 2, and matches it with the built-in circuit board information to obtain this circuit board information. Based on this, a control command is sent to control the four push plates 3 to work. The four push plates 3 act independently to push the circuit board on the support plate 2 to the preset position in the circuit board information and clamp it. At this time, the area to be marked on the circuit board is located directly below the laser head, which means that it can realize the identification and positioning marking of circuit boards of various specifications; and the offset state of the circuit board on the support plate 2 does not affect the operation of the four push plates 3, that is, it is not affected by the feeding, and the circuit board only needs to be able to be placed stably on the support plate 2.

[0050] Among them, the circuit board information includes the model and position of the circuit board. The model includes the length and width data of the circuit board. The position includes the marking positioning position (that is, the positioning position of the circuit board on the support plate 2) and the current circuit board placement position (that is, the position of the circuit board on the support plate 2 when it is captured by the image acquisition component 1, and the position of the circuit board after being clamped and straightened on the support plate 2).

[0051] Specifically:

[0052] When the circuit board is placed on the support plate 2 with a deflection, the image acquisition component 1 collects the information of the circuit board, and controls the pushing distance of the four push plates 3 according to the specifications, so that the circuit board is placed in the center. At this time, the position information of the circuit board after being straightened is obtained in real time, and then the four push plates 3 are controlled to move, so that the circuit board is pushed to the preset position. In this process, the image acquisition component 1 monitors the position of the circuit board in real time, that is, it can dynamically adjust the push plates 3 to accurately position the circuit board to avoid errors caused by sliding deviation.

[0053] Based on the above embodiments, the four push plates 3 need to act independently, therefore, the following preferred embodiments are provided.

[0054] like Figure 1 , Figure 2 As shown, four push rods 21 are arranged on the supporting plate 2, and the four push rods 21 are arranged on four sides of the supporting plate 2, and the movable end of each push rod 21 is connected to the push plate 3 to push or pull the push plate 3;

[0055] The push plate 3 is movably mounted on the movable end of the push rod 21 , and the push plate 3 can adjust the connection point between the push plate 3 and the push rod 21 according to a control command to adjust the clamping position of the push plate 3 .

[0056] Specifically, each push plate 3 is provided with a push rod 21 for pushing, and the push rod 21 can be driven by an electric control method to improve the accuracy.

[0057] Furthermore, the push plate 3 can actively translate on the movable end of the push rod 21 , so that after the push plate 3 clamps the circuit board, the four push plates 3 can further push the circuit board to translate, thereby increasing the adjustable range.

[0058] In order to enable the push plate 3 to actively translate on the movable end of the push rod 21 , the following preferred embodiments are provided.

[0059] like Figure 3 As shown, a slide groove 31 is provided on one side of the push plate 3 close to the push rod 21, a tooth surface 311 is formed at the bottom of the slide groove 31, and guide grooves 312 are provided on both side walls of the slide groove 31;

[0060] A fixed block 22 is provided on the movable end of the push rod 21. The fixed block 22 is slidably installed in the slide groove 31. A motor and a gear 221 are provided on the fixed block 22. The gear 221 is rotatably embedded in the bottom of the fixed block 22 and is installed in cooperation with the tooth surface 311.

[0061] Guide bars 222 are provided on both sides of the fixed block 22, and the guide bars 222 are slidably installed in the guide grooves 312;

[0062] The shaft of the motor is connected to the shaft of the gear 221 in a transmission manner to drive the gear 221 to rotate forward or reverse.

[0063] Specifically, the motor drives the gear 221 to rotate according to the control command, and the gear 221 is installed in conjunction with the tooth surface 311, so that the push plate 3 is pushed horizontally by the gear 221, so that the push plate 3 can move along the surface of the supporting plate 2 in a direction perpendicular to the movement of the push rod 21, thereby realizing the adjustment of the clamping area, that is, the adjustable range of the circuit board position can be increased.

[0064] Of course, before clamping and moving the circuit board, the circuit board may deviate due to feeding reasons, causing the circuit board to be placed non-center on the support plate 2. Therefore, in order to enable the push plate 3 to clamp and position various deviated circuit boards, the following preferred embodiments are provided.

[0065] like Figure 2 As shown, a frame body 23 is provided outside the supporting plate 2, a fixed shaft 24 is centrally provided at the bottom of the supporting plate 2, a spoke bracket 241 is rotatably provided on the fixed shaft 24, and the outer ends of the spoke bracket 241 are fixed on the frame body 23, so that the frame body 23 can rotate around the supporting plate 2;

[0066] The fixed ends of the four push rods 21 are respectively fixed on four sides of the frame body 23 , and the directions of the four push rods 21 can be adjusted by rotating the frame body 23 .

[0067] Specifically, the frame body 23 rotates around the fixed axis 24 through the spoke bracket 241, that is, it rotates around the supporting plate 2. That is, after the image acquisition component 1 collects the circuit board information and the position is not correct, the control command includes controlling the frame body 23 to rotate so that the four push plates 3 are parallel to the four sides of the circuit board respectively, so that the circuit board can be accurately clamped, and the circuit board can be straightened by resetting rotation.

[0068] Of course, in the process of moving the circuit boards, some circuit boards may be offset too much after being loaded, causing the circuit boards to deviate to one side of the supporting plate 2. In order to align and position such circuit boards, the following preferred embodiments are provided.

[0069] like Figure 1 , Figure 2 As shown, four linear slides 231 are arranged on the outside of the frame body 23 . The four linear slides 231 are arranged on four sides of the frame body 23 . The fixed ends of the four push rods 21 are fixed on the sliders of the four linear slides 231 , respectively.

[0070] Specifically, the push rod 21 is fixed on the slider of the linear slide 231. Therefore, the linear slide 231 can control the horizontal movement of the push rod 21, that is, it can adjust the pushing and clamping range of the push rod 21. It cooperates with the push plate 3 to be driven horizontally by the motor and gear 221, further improving the adjustable range of the circuit board position.

[0071] Of course, the circuit board needs to contact and rub with the supporting plate 2 during the adjustment process, which has little effect on single-sided circuit boards, but may cause wear and tear on double-sided circuit boards. Therefore, the following preferred embodiments are provided.

[0072] like Figure 4 As shown, a card slot 32 is provided on one side of the push plate 3 facing the central area of ​​the supporting plate 2. The card slot 32 is close to the bottom edge of the push plate 3, and the card slot 32 and the bottom edge of the push plate 3 form a wedge surface 321. The wedge surface 321 guides the circuit board to move up when the push plate 3 clamps the circuit board, so as to lift the circuit board off the supporting plate 2.

[0073] Specifically, when the push plates 3 push the circuit board to move, when the two opposite push plates 3 clamp the circuit board, the circuit board will slide along the wedge surface 321 into the card slot 32, so that the circuit board moves up and is lifted away from the supporting plate 2, that is, in the process of the push plates 3 moving the circuit board, friction can be reduced, thereby reducing wear.

[0074] Further, if Figure 4 As shown, the side wall of the push plate 3 below the slot 32 protrudes toward the central area of ​​the supporting plate 2 to form a front shovel 322 , and the wedge surface 321 extends to the end of the front shovel 322 .

[0075] Specifically, the bottom of the push plate 3 is extended so that it protrudes toward the central area of ​​the supporting plate 2 to form a front shovel 322, so that the front shovel 322 can push the plate 3 to contact the circuit board first, thereby being able to lift the circuit board faster. Moreover, since the bottom of the front shovel 322 is longer, the angle of the wedge surface 321 can be made smaller, thereby reducing the resistance to scooping up the circuit board, making the circuit board easier to lift and reducing wear.

[0076] Of course, before positioning the circuit board, the image acquisition component 1 is required to acquire image information of the support plate 2. Based on this, the following preferred embodiments are provided.

[0077] like Figure 1 As shown, the image acquisition component 1 includes a main control computer 11 and a camera component 12. The camera component 12 is located above the support plate 2 and faces the support plate 2. The main control computer 11 establishes a communication connection with the camera component 12 to receive image information collected by the camera component 12.

[0078] The circuit board information is preset in the main control machine 11, and the circuit board information includes the model and location of the circuit board. The main control machine 11 sends the control command according to the circuit board information.

[0079] Specifically, the main control computer 11 is used to process the images captured by the camera component 12 and send control commands. The circuit board information is preset in the main control computer 11. Therefore, when switching the circuit board, it can automatically identify and locate the marking without having to operate to input the circuit board information again, thereby reducing the production links.

[0080] Furthermore, since the main control machine 11 has built-in information of various circuit boards, mixed marking of circuit boards of various specifications can be achieved without manual switching.

[0081] Based on the above embodiment, the circuit board information is collected by the camera component 12. In order to improve the accuracy of the information collected by the camera component 12, the following preferred embodiments are provided.

[0082] like Figure 1 As shown, the camera assembly 12 includes a first lens 121 and a second lens 122 , and the first lens 121 and the second lens 122 are respectively arranged on both sides of the laser head of the marking machine to form a binocular vision positioning architecture.

[0083] Specifically, the fields of view of the first lens 121 and the second lens 122 both include the support plate 2, and the first lens 121 and the second lens 122 are at a fixed distance and at a fixed angle to form a binocular vision positioning architecture to improve the accuracy of the circuit board position information analysis. Binocular vision positioning is a relatively mature positioning technology, so it is relatively easy to implement.

[0084] Based on the above-mentioned machine vision-based PCB marking positioning system, a positioning method is provided below, including the following steps:

[0085] Step 100: After the circuit board is freely placed on the support plate, the image acquisition component acquires information of the circuit board, wherein the circuit board information includes model and location;

[0086] Step 200: After the image acquisition component obtains the specifications and marking position of the circuit board according to the collected circuit board model and the preset circuit board information, it sends a control command;

[0087] Step 300: The four push plates move a corresponding distance on the support plate according to the control command, push and clamp the circuit board, and position the circuit board so that the marking position of the circuit board is directly below the laser head of the marking machine.

[0088] The positioning method of the present invention mainly utilizes the image acquisition component to obtain the circuit board information on the support plate, including the model and position, and then sends a command to control the push plate to clamp the circuit board and align it. After the circuit board is aligned, the image acquisition component obtains the position of the aligned circuit board, and controls the push plate to continue to move according to the preset circuit board information, so that the circuit board is pushed to the preset position, and then the laser head of the marking machine works to mark.

[0089] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A PCB marking and positioning system based on machine vision, characterized in that: include: An image acquisition component (1), the image acquisition component (1) being arranged on the marking machine and used for acquiring image information within a field of view and outputting a control command according to the image information; A support plate (2), the support plate (2) being arranged on the marking machine and located below the image acquisition component (1), and the support plate (2) being used to support a circuit board placed thereon so that the circuit board is located within the field of view of the image acquisition component (1); Four push plates (3), the four push plates (3) are movably arranged on the support plate (2) and are respectively located on four sides of the support plate (2), and each push plate (3) works independently; The image acquisition component (1) is preset with a plurality of circuit board information. After the image acquisition component (1) acquires the circuit board on the support plate (2), it automatically matches the preset circuit board information and sends a control command according to the corresponding preset circuit board information. The four push plates (3) move a corresponding distance according to the control command to push and clamp the circuit board to be positioned directly below the laser head of the marking machine.

2. A PCB marking and positioning system based on machine vision according to claim 1, characterized in that: Four push rods (21) are arranged on the supporting plate (2), and the four push rods (21) are arranged on four sides of the supporting plate (2). The movable end of each push rod (21) is connected to the push plate (3) to push or pull the push plate (3); The push plate (3) is movably mounted on the movable end of the push rod (21), and the push plate (3) can adjust the connection point between it and the push rod (21) according to a control command to adjust the clamping position of the push plate (3).

3. A PCB marking and positioning system based on machine vision according to claim 2, characterized in that: A slide groove (31) is provided on one side of the push plate (3) close to the push rod (21), a tooth surface (311) is formed at the bottom of the slide groove (31), and guide grooves (312) are provided on both side walls of the slide groove (31); A fixed block (22) is arranged on the movable end of the push rod (21), the fixed block (22) is slidably mounted in the slide groove (31), a motor and a gear (221) are arranged on the fixed block (22), the gear (221) is rotatably embedded in the bottom of the fixed block (22) and is mounted in cooperation with the tooth surface (311); Guide bars (222) are provided on both sides of the fixed block (22), and the guide bars (222) are slidably installed in the guide grooves (312); The shaft of the motor is in transmission connection with the shaft of the gear (221) to drive the gear (221) to rotate forward or reverse.

4. A PCB marking and positioning system based on machine vision according to claim 2 or 3, characterized in that: A frame body (23) is arranged outside the supporting plate (2), a fixed shaft (24) is arranged in the center of the bottom of the supporting plate (2), a spoke bracket (241) is rotatably arranged on the fixed shaft (24), and the outer ends of the spoke bracket (241) are fixed to the frame body (23), so that the frame body (23) can rotate around the supporting plate (2); The fixed ends of the four push rods (21) are respectively fixed on four sides of the frame body (23), and the directions of the four push rods (21) can be adjusted by rotating the frame body (23).

5. The PCB marking and positioning system based on machine vision according to claim 4 is characterized in that: Four linear slides (231) are arranged on the outside of the frame body (23), and the four linear slides (231) are arranged on four sides of the frame body (23), and the fixed ends of the four push rods (21) are respectively fixed on the sliders of the four linear slides (231).

6. The PCB marking and positioning system based on machine vision according to claim 1, characterized in that: A slot (32) is provided on one side of the push plate (3) facing the central area of ​​the support plate (2), the slot (32) being close to the bottom edge of the push plate (3), and the slot (32) and the bottom edge of the push plate (3) forming a wedge surface (321), the wedge surface (321) guiding the circuit board to move upward when the push plate (3) clamps the circuit board, so as to lift the circuit board off the support plate (2).

7. A machine vision-based PCB marking and positioning system according to claim 6, characterized in that: The side wall of the push plate (3) located below the slot (32) protrudes toward the central area of ​​the support plate (2) to form a front shovel (322), and the wedge surface (321) extends to the end of the front shovel (322).

8. The PCB marking and positioning system based on machine vision according to claim 2, characterized in that: The image acquisition component (1) comprises a main control computer (11) and a camera component (12), wherein the camera component (12) is located above the support plate (2) and faces the support plate (2), and the main control computer (11) establishes a communication connection with the camera component (12) to receive image information acquired by the camera component (12); The circuit board information is preset in the main control machine (11), the circuit board information includes the model and location of the circuit board, and the main control machine (11) sends a control command according to the circuit board information.

9. The PCB marking and positioning system based on machine vision according to claim 1, characterized in that: The camera assembly (12) comprises a first lens (121) and a second lens (122), wherein the first lens (121) and the second lens (122) are arranged on both sides of the laser head of the marking machine to form a binocular vision positioning architecture.

10. A positioning method using the machine vision-based PCB marking positioning system according to any one of claims 1 to 9, characterized in that: The steps include: Step 100: After the circuit board is freely placed on the support plate, the image acquisition component acquires information of the circuit board, wherein the circuit board information includes model and location; Step 200: After the image acquisition component obtains the specifications and marking position of the circuit board according to the collected circuit board model and the preset circuit board information, it sends a control command; Step 300: The four push plates move a corresponding distance on the support plate according to the control command, push and clamp the circuit board, and position the circuit board so that the marking position of the circuit board is directly below the laser head of the marking machine.

Images