Machine vision positioning detection system

Abstract

A machine vision positioning detection system disclosed by the present invention comprises an operation table, a contact sensor, a centering plate and a transmission rod, the top of the operation table is symmetrically provided with a first device support and a second device support, and the interior of the second device support is connected with a first lead screw. Through the arrangement of a second motor, a two-way thread, moving blocks and a first lead screw and the guidance quality of a guide rod, the two moving blocks can be assisted to drive the centering plate to move oppositely; and the expansibility of the expansion tension spring is matched with the guide block connected with the head end of the transmission rod to guide and slide along the guide groove, so that the two centering plates can be assisted to clamp an object for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of article detection, and specifically to a machine vision positioning detection system. Background Art

[0002] The detection system based on machine vision is a system with high practical value and wide practical significance. It realizes the intelligent detection of an article by using the image processing and pattern recognition technologies of machine vision, and can read codes for traceability, detect defects of the article such as: whether there are missing parts, wrong parts (R, C, and L), measure whether the pins are bent, and whether the welding feet are regular, etc. This system has the advantages of fast detection speed, high positioning accuracy, and strong practicability. It can be applied to the engineering fields of article detection and processing assembly line operations.

[0003] The existing article detection generally adopts manual detection, but manual detection has large errors and high error rates. At the same time, it increases the labor intensity of workers and increases production costs, and there is an urgent need for development. Summary of the Invention

[0004] The purpose of the present invention is to provide a machine vision positioning detection system to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A machine vision positioning detection system includes an operation table, a contact sensor, a centering plate, and a transmission rod. On the top of the operation table, a device bracket one and a device bracket two are symmetrically installed. Inside the device bracket two, a lead screw one is connected. The lead screw one extends to the front side of the device bracket two and is equipped with a motor two. On the outside of the lead screw one, a double-thread is symmetrically connected. On the outside of both double-threads, a moving block is sleeved. Inside the top of both moving blocks, a guide rod is provided. The guide rod is fixed above the lead screw one. At the bottom of both moving blocks, a sleeve block is connected. Inside the sleeve block, the transmission rod is symmetrically hinged. At the outer ends of both transmission rods, a guiding block is hinged. Between both sleeve blocks, a centering plate is symmetrically provided. On the relatively far sides of both centering plates, a guiding groove matching with the guiding block is symmetrically connected. Inside the side surface of the contact sensor, a contact sensor is installed. At the top and bottom inside the sleeve block, an expansion tension spring is hinged. The other end of the expansion tension spring is hinged to the surface of the transmission rod.

[0006] Preferably, a conveyor belt motor is installed on the front side of the operation table, and the conveyor belt motor is electrically controlled with the contact sensor.

[0007] Preferably, a second lead screw penetrates through the top of the first device bracket. A first motor is installed at the upper end of the second lead screw, and a unidirectional thread is connected to the lower end of the second lead screw. A moving cylinder is sleeved outside the unidirectional thread. A monitoring camera is installed at the bottom of the moving cylinder. A guiding sliding sleeve is connected to the top of one side of the moving cylinder. A guiding sliding rod is arranged inside the guiding sliding sleeve, and the upper end of the guiding sliding rod is fixed to the top inside the first device bracket.

[0008] Preferably, the monitoring camera includes an image acquisition device. A display is arranged between the first device bracket and the second device bracket, and the display is electrically controlled and connected to the image acquisition device.

[0009] Preferably, the monitoring camera is electrically controlled and connected to a contact sensor, and the contact sensor is electrically controlled and connected to the first motor.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] (1) In this machine vision positioning and detection system, through the cooperation of the second motor, bidirectional thread, moving block, and first lead screw, and the guiding property of the guide rod, the two moving blocks can be assisted to drive the centering plate to move towards each other. The expansibility of the expansion spring and the guiding block connected to the head end of the transmission rod can slide along the guiding groove to assist the two centering plates to maintain a long-term clamping effect on the article, so as to perform centering operation on the article, which is convenient for the monitoring camera to perform positioning and acquisition on it, and improves the detection accuracy and stability;

[0012] (2) In this machine vision positioning and detection system, through the cooperation of the first motor, second lead screw, guiding sliding sleeve, guiding sliding rod, and unidirectional thread, and the guiding property of the guiding sliding sleeve sliding along the guiding sliding rod, the moving cylinder can be limited and assisted to move up and down along the unidirectional thread in a straight line, which is used to adjust the height range of the monitoring camera, is convenient for adjustment, and improves the detection accuracy of the article;

[0013] (3) In this machine vision positioning and detection system, when the contact sensor is used to sense the article and its positioning state, the signal of the contact sensor is transmitted to stop the conveyor belt motor, and the first motor is controlled to drive and adjust the monitoring camera to a suitable height, and then the article is positioned and detected. The image acquisition device in the monitoring camera transmits the collected data to the display for display, making the robot vision more sensitive, thus improving the efficiency. It can not only obtain higher detection accuracy, but also greatly reduce the detection time consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view structural diagram of the present invention;

[0015] Figure 2 It is a side view structural diagram of the connection between the second device bracket and the operating table of the present invention;

[0016] Figure 3 Side view structural schematic diagram of the connection between the first device bracket and the operation console of the present invention;

[0017] Figure 4 Schematic diagram of the system connection structure of the present invention Figure 1 ;

[0018] Figure 5 Schematic diagram of the system connection structure of the present invention Figure 2 .

[0019] In the figure: 1, operation console; 2, first device bracket; 3, first motor; 4, display; 5, second device bracket; 6, second motor; 7, conveyor belt motor; 8, double - thread; 9, sleeve block; 10, guide groove; 11, contact sensor; 12, centering plate; 13, guide block; 14, expansion tension spring; 15, moving block; 16, first lead screw; 17, transmission rod; 18, second lead screw; 19, guide sliding sleeve; 20, guide sliding rod; 21, monitoring camera; 22, single - thread; 23, moving cylinder; 24, image acquisition device; 25, guide rod. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-5 , an embodiment provided by the present invention: A machine vision positioning and detection system, including an operation console 1, a contact sensor 11, a centering plate 12 and a transmission rod 17. On the top of the operation console 1, a first device bracket 2 and a second device bracket 5 are symmetrically installed. Inside the second device bracket 5, a first lead screw 16 is connected. The first lead screw 16 extends to the front side of the second device bracket 5 and a second motor 6 is installed. On the outside of the first lead screw 16, double - threads 8 are symmetrically connected. On the outside of both double - threads 8, moving blocks 15 are sleeved. The settings of the second motor 6, the double - threads 8, the moving blocks 15 and the first lead screw 16, combined with the guiding property of the guide rod 25, can assist the two moving blocks 15 to drive the centering plate 12 to move towards each other;

[0022] Inside the tops of the two moving blocks 15, there are guide rods 25. The guide rods 25 are fixed above the first lead screw 16. Both bottoms of the two moving blocks 15 are connected with sleeve blocks 9. Inside the sleeve blocks 9, there are symmetrically hinged transmission rods 17. The outer ends of the two transmission rods 17 are both hinged with guide blocks 13. Between the two sleeve blocks 9, there are symmetrically arranged centering plates 12. Inside the relatively far sides of the two centering plates 12, there are symmetrically connected guide grooves 10 that match the guide blocks 13. Inside the side surface of the contact sensor 11, there is installed the contact sensor 11. The contact sensor 11 is used to sense the item. When positioning its state, the signal of the contact sensor 11 is transmitted to stop the transmission of the conveyor belt motor 7, and the first motor 3 is controlled to drive and adjust the monitoring camera 21 to a suitable height, and then the item is positioned and detected;

[0023] At the top and bottom inside the sleeve block 9, there are hinged expansion tension springs 14. The expansibility of the expansion tension springs 14, combined with the guiding function that the guide blocks 13 connected to the head ends of the transmission rods 17 can slide along the guide grooves 10, can assist the two centering plates 12 to maintain a long-term clamping effect on the item, enabling the item to be centered, facilitating the monitoring camera 21 to perform positioning and acquisition on it, improving the detection accuracy and stability. The image acquisition device 24 inside the monitoring camera 21 transmits the collected data to the display 4 for display, making the robot more sensitive visually, thereby improving the efficiency. It can not only achieve higher detection accuracy but also greatly reduce the detection time;

[0024] The other ends of the expansion tension springs 14 are hinged to the surfaces of the transmission rods 17.

[0025] At the front side of the operating table 1, there is installed a conveyor belt motor 7. The conveyor belt motor 7 is electrically controlled by the contact sensor 11.

[0026] Inside the top of the device support one 2, there is penetrated a second lead screw 18. At the upper end of the second lead screw 18, there is installed a first motor 3. At the lower end of the second lead screw 18, there is connected a single-thread 22. Outside the single-thread 22, there is sleeved a moving cylinder 23. At the bottom of the moving cylinder 23, there is installed a monitoring camera 21. At the top of one side of the moving cylinder 23, there is connected a guiding sliding sleeve 19. Inside the guiding sliding sleeve 19, there is a guiding sliding rod 20. The upper end of the guiding sliding rod 20 is fixed to the top inside the device support one 2. The settings of the first motor 3, the second lead screw 18, the guiding sliding sleeve 19, the guiding sliding rod 20, and the single-thread 22, combined with the guiding property that the guiding sliding sleeve 19 slides along the guiding sliding rod 20, can limit and assist the moving cylinder 23 to move up and down linearly along the single-thread 22, for adjusting the height range of the monitoring camera 21, facilitating adjustment and improving the detection accuracy of the item.

[0027] Inside the monitoring camera 21, there is an image acquisition device 24. Between the device support one 2 and the device support two 5, there is a display 4. The display 4 is electrically controlled and connected to the image acquisition device 24.

[0028] The monitoring camera 21 is electrically and controllably connected to the contact sensor 11, and the contact sensor 11 is electrically and controllably connected to the first motor 3.

[0029] In the use of the embodiment of the present application: The contact sensor 11 is used to sense an item. When positioning the item, the signal of the contact sensor 11 is transmitted to stop the conveyor belt motor 7 from driving, and the first motor 3 is controlled to drive and adjust the monitoring camera 21 to a suitable height, and then the item is positioned and detected. The image acquisition device 24 in the monitoring camera 21 transmits the collected data to the display 4 for display, making the robot more sensitive visually, thereby improving the efficiency. Not only can higher detection accuracy be obtained, but also the detection time can be greatly reduced.

Claims

1. A machine vision positioning detection system, characterized in that: The invention comprises an operating table (1), a contact sensor (11), a centering plate (12) and a transmission rod (17); a device bracket 1 (2) and a device bracket 2 (5) are symmetrically mounted on the top of the operating table (1); a lead screw 1 (16) is connected to the inside of the device bracket 2 (5); the lead screw 1 (16) extends to the front side of the device bracket 2 (5) and is mounted with a motor 2 (6); a bidirectional thread (8) is symmetrically connected to the outside of the lead screw 1 (16); a moving block (15) is mounted on the outside of the two bidirectional threads (8); a guide rod (25) is mounted on the top of the two moving blocks (15); the guide rod (25) is fixed on the top of the lead screw 1 (16); and the two guide rods (25) are fixed on the top of the lead screw 1 (16). The bottom of each moving block (15) is connected to a sleeve block (9), the inner side of the sleeve block (9) is symmetrically hinged with a transmission rod (17), the outer ends of the two transmission rods (17) are hinged with a guide block (13), a centering plate (12) is symmetrically arranged between the two sleeve blocks (9), and a guide groove (10) matching the guide block (13) is symmetrically connected to the inner side of the two centering plates (12) that are relatively far away from each other, and a contact sensor (11) is installed in the side surface of the contact sensor (11), and an expansion spring (14) is hinged at the top and bottom of the sleeve block (9), and the other end of the expansion spring (14) is hinged to the surface of the transmission rod (17).

2. A machine vision positioning detection system according to claim 1, characterized in that: A conveyor belt motor (7) is installed on the front side of the operating table (1), and the conveyor belt motor (7) is electrically controlled with the contact sensor (11).

3. A machine vision positioning detection system according to claim 1, characterized in that: A lead screw 2 (18) passes through the top of the device bracket 1 (2), a motor 1 (3) is installed at the upper end of the lead screw 2 (18), a one-way thread (22) is connected to the lower end of the lead screw 2 (18), a moving cylinder (23) is sleeved on the outside of the one-way thread (22), a monitoring camera (21) is installed at the bottom of the moving cylinder (23), a guide sleeve (19) is connected to the top of one side of the moving cylinder (23), a guide slide rod (20) is arranged in the guide sleeve (19), and the upper end of the guide slide rod (20) is fixed to the top of the device bracket 1 (2).

4. A machine vision positioning detection system according to claim 3, characterized in that: The monitoring camera (21) includes an image acquisition device (24), a display (4) is provided between the device support 1 (2) and the device support 2 (5), and the display (4) is electrically controlled and connected to the image acquisition device (24).

5. A machine vision positioning detection system according to claim 4, characterized in that: The monitoring camera (21) is electrically controlled and connected to the contact sensor (11), and the contact sensor (11) is electrically controlled and connected to the motor 1 (3).

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