A harness terminal detection device based on visual recognition and a method thereof

Abstract

This invention relates to the field of wire harness terminal inspection technology and discloses a wire harness terminal inspection device and method based on vision recognition, which solves the current problem of difficulty in quickly removing defective terminals. It includes a conveyor frame with a conveyor belt on its inner side, a servo motor mounted on the conveyor frame for driving the conveyor belt, a fixing mechanism on the outer surface of the conveyor belt, a pushing mechanism on the top of the conveyor frame, a CCD camera above the conveyor belt, and an adjustment mechanism on the CCD camera. The fixing mechanism includes a mounting plate fixed to the outer surface of the conveyor belt, a positioning frame fixedly connected to the top of the mounting plate, and a notch on the positioning frame. This invention facilitates the movement of the clamping plate and pressure plate by pushing the side plate, releasing the fixing of the terminals and wire harness, and allowing the push rod to move and pass through the clearance hole, thereby facilitating the rapid removal of defective terminals from the positioning frame.

Description

Technical Field

[0001] This invention belongs to the field of wire harness terminal detection technology, specifically a wire harness terminal detection device and method based on vision recognition. Background Technology

[0002] Wire harness terminals are metal conductive connection components formed by crimping the ends of wires. They are mainly used for quick plugging and conduction between circuits and are key components in wire harness assemblies of various electrical equipment. Their appearance, size and molding quality directly affect the reliability of electrical connections. In actual production, wire harness terminals are usually fixed on a conveyor belt for continuous conveying so that appearance and size can be inspected online by automated equipment.

[0003] Currently, the industry mostly uses photoelectric sensors in conjunction with CCD cameras to achieve visual recognition and detection of wire harness terminals. By comparing images, it is possible to quickly determine whether there are defects such as deformation, poor crimping, or missing materials in the terminals. However, after identifying defective terminals, it is difficult to achieve a fast and stable rejection action, which can easily lead to problems such as delayed rejection or false rejection, affecting detection efficiency and sorting accuracy. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a wire harness terminal detection device and method based on visual recognition, which effectively solves the problem of the difficulty in quickly removing defective terminals.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wire harness terminal detection device based on visual recognition, comprising a conveyor frame, a conveyor belt on the inner side of the conveyor frame, a servo motor for driving the conveyor belt to run on the conveyor frame, a fixing mechanism on the outer surface of the conveyor belt, a pushing mechanism on the top of the conveyor frame, a CCD camera above the conveyor belt, and an adjustment mechanism on the CCD camera. The fixing mechanism includes a mounting plate fixed to the outer surface of the conveyor belt, a positioning frame fixedly connected to the top of the mounting plate, a notch on the positioning frame, and clearance holes on the side of the positioning frame. The pushing mechanism includes a top plate fixed to the top of the conveyor frame, a horizontal column fixedly installed on the outer side of the top plate, a mounting plate fixedly connected to the end of the horizontal column away from the top plate, a photoelectric sensor fixedly installed on the side of the mounting plate away from the horizontal column, a push plate movably sleeved on the outer side of the horizontal column, a push rod fixedly connected to the side of the push plate near the positioning frame, the outer diameter of the push rod being equal to the inner diameter of the clearance hole, a cylinder fixedly installed on the outer side of the top plate, and the side of the push plate away from the push rod being fixed to the output end of the cylinder.

[0006] Preferably, a guide rod is fixedly connected between the positioning frame and the mounting plate, a guide plate is movably sleeved on the outer side of the guide rod, and a pressure plate is fixedly connected to the bottom of the guide plate.

[0007] Preferably, a guide block is movably sleeved on the outer side of the guide rod, a spring is fixedly connected between the guide block and the positioning frame, the spring is sleeved on the outer side of the guide rod, a clamping plate is fixedly connected to the bottom of the guide block, and an avoidance groove is provided on the outer side of the positioning frame, the avoidance groove corresponding to the clamping plate.

[0008] Preferably, the top of the guide block is rotatably connected to a movable rod, and the top end of the movable rod is rotatably connected to the outside of the guide plate.

[0009] Preferably, a square plate is fixedly connected to the outer side of the positioning frame, a square frame is movably sleeved on the outer side of the square plate, a side plate is fixedly connected to the side of the square frame away from the positioning frame, a movable rod two is rotatably connected to the outer side of the square frame, and the end of the movable rod two away from the square frame is rotatably connected to the outer side of the guide block.

[0010] Preferably, the adjustment mechanism includes a U-shaped rod fixed to the top of the conveyor frame, a top plate fixedly sleeved on the outside of the U-shaped rod, a lifting plate movably sleeved on the outside of the U-shaped rod, and a CCD camera fixed to the bottom of the lifting plate.

[0011] Preferably, a sleeve plate is fixedly sleeved on the middle of the outer side of the U-shaped rod, a second cylinder is fixedly installed at the bottom of the sleeve plate, and the top of the lifting plate is fixed to the output end of the second cylinder.

[0012] Preferably, the inner side of the conveyor frame is provided with a guide frame, the guide frame is located above the conveyor belt, the inner side of the guide frame is fixedly connected with an inclined plate, and the lower part of the guide frame is provided with a guide hopper.

[0013] Preferably, a collection box is provided below the guide bucket, and a support plate is fixedly connected between the guide bucket, the guide frame and the conveyor frame.

[0014] A method for detecting wire harness terminals based on visual recognition includes the following steps: Step 1: First, start cylinder one, which moves the push plate and pushes the side plate, while simultaneously moving the clamping plate and pressure plate to release the fixing of the wire harness terminals; Step 2: Then the push plate continues to move and drives the push rod to move. Subsequently, the push rod passes through the clearance hole and pushes the defective terminal out of the positioning frame, thereby achieving the rapid rejection of the defective terminal.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the cooperation of a photoelectric sensor and a CCD camera, can identify defective wire harness terminals. By activating a cylinder, a push plate can be moved, which facilitates the movement of the side plate, causing the clamping plate and pressure plate to move, thereby releasing the fixation of the terminal and wire harness. At the same time, the push rod can be moved and pass through the clearance hole, thus facilitating the rapid removal of defective terminals from the positioning frame.

[0016] 2. This invention enables the lifting plate to slide along the U-shaped rod by activating cylinder two, thereby facilitating the adjustment of the CCD camera height as needed.

[0017] 3. This invention, by setting an inclined plate inside the flow guide frame, enables defective terminals to fall when pushed into the flow guide frame, thereby facilitating the defective terminals to fall into the collection box through the flow guide bucket for collection and processing. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the wire harness terminal detection device based on vision recognition according to the present invention; Figure 2 This is a schematic diagram of the fixing mechanism structure of the present invention; Figure 3 This is a schematic diagram of the positioning frame structure of the present invention; Figure 4 This is a schematic diagram of the pushing mechanism structure of the present invention; Figure 5 This is a schematic diagram of the adjustment mechanism structure of the present invention; Figure 6 This is a schematic diagram of the flow guide frame structure of the present invention.

[0020] In the diagram: 1. Conveyor frame; 2. Fixing mechanism; 201. Mounting plate; 202. Clamping plate; 203. Guide block; 204. Pressure plate; 205. Guide plate; 206. Guide rod; 207. Movable rod one; 208. Movable rod two; 209. Side plate; 2010. Square frame; 2011. Square plate; 2012. Spring; 2013. Positioning frame; 2014. Clearance groove; 2015. Notch; 2016. Clearance hole; 3. Push 301. Conveying mechanism; 302. Top plate; 303. Horizontal column; 304. Mounting plate; 305. Photoelectric sensor; 306. Push rod; 307. Push plate; 308. Cylinder 1; 4. Adjusting mechanism; 401. U-shaped rod; 402. Sleeve plate; 403. Cylinder 2; 404. Lifting plate; 5. CCD camera; 6. Conveyor belt; 7. Servo motor; 8. Guide frame; 9. Support plate; 10. Collection box; 11. Guide bucket; 12. Inclined plate. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Example 1, by Figures 1-6 The present invention relates to a wire harness terminal detection device and method based on vision recognition, comprising a conveyor frame 1, a conveyor belt 6 provided on the inner side of the conveyor frame 1, a servo motor 7 for driving the conveyor belt 6 to run on the conveyor frame 1, a fixing mechanism 2 provided on the outer surface of the conveyor belt 6, a pushing mechanism 3 provided on the top of the conveyor frame 1, a CCD camera 5 provided above the conveyor belt 6, and an adjustment mechanism 4 provided on the CCD camera 5.

[0023] In Embodiment 2, based on Embodiment 1, the fixing mechanism 2 includes a mounting plate 201 fixed to the outer surface of the conveyor belt 6. A positioning frame 2013 is fixedly connected to the top of the mounting plate 201. The positioning frame 2013 has a notch 2015 for avoiding the wire harness, so that the wire harness can be prevented from hitting the top of the mounting plate 201. The side of the positioning frame 2013 has a clearance hole 2016. A guide rod 206 is fixedly connected between the positioning frame 2013 and the mounting plate 201. A guide plate 205 is movably sleeved on the outer side of the guide rod 206. A pressure plate 204 is fixedly connected to the bottom of the guide plate 205. A guide block 203 is movably sleeved on the outer side of the guide rod 206. A spring 201 is fixedly connected between the guide block 203 and the positioning frame 2013. 2. Spring 2012 is sleeved on the outside of guide rod 206. Clamping plate 202 is fixedly connected to the bottom of guide block 203. Alignment groove 2014 is provided on the outside of positioning frame 2013. Alignment groove 2014 corresponds to clamping plate 202. Movable rod 1 207 is rotatably connected to the top of guide block 203. The top of movable rod 1 207 is rotatably connected to the outside of guide plate 205. Square plate 2011 is fixedly connected to the outside of positioning frame 2013. Square frame 2010 is movably sleeved on the outside of square plate 2011. Side plate 209 is fixedly connected to the side of square frame 2010 away from positioning frame 2013. Movable rod 208 is rotatably connected to the outside of square frame 2010. The end of movable rod 208 away from square frame 2010 is rotatably connected to the outside of guide block 203. First, push the side plate 209 to drive the square frame 2010 to slide along the square plate 2011. Then, through the second movable rod 208, drive the guide block 203 to slide along the guide rod 206. At this time, the spring 2012 is stretched and the clamping plate 202 moves away from the positioning frame 2013. At the same time, through the first movable rod 207, drive the guide plate 205 to slide upward along the guide rod 206, so that the pressure plate 204 rises. Then, the terminal is placed in the positioning frame 2013 so that the wire harness is located on the top of the mounting plate 201. Then, the side plate 209 is released. At this time, the spring 2012 resets and drives the guide block 203 to slide along the guide rod 206, and drives the clamping plate 202 to move through the clearance groove 2014 to clamp the terminal. At the same time, the pressure plate 204 descends to clamp the wire harness, and finally the wire harness terminal is fixed.

[0024] In Example 3, based on Example 1, the pushing mechanism 3 includes a top plate 301 fixed to the top of the conveyor frame 1. A horizontal column 302 is fixedly installed on the outer side of the top plate 301. A mounting plate 303 is fixedly connected to the end of the horizontal column 302 away from the top plate 301. A photoelectric sensor 304 is fixedly installed on the side of the mounting plate 303 away from the horizontal column 302. A push plate 306 is movably sleeved on the outer side of the horizontal column 302. A push rod 305 is fixedly connected to the side of the push plate 306 near the positioning frame 2013. The outer diameter of the push rod 305 is equal to the inner diameter of the clearance hole 2016. A cylinder 307 is fixedly installed on the outer side of the top plate 301. The push plate 306 is fixed on the side away from the push rod 305 to the output end of the cylinder 307. The servo motor 7 controls the movement of the conveyor belt 6, so that the wire harness terminal is conveyed on the conveyor belt 6. When the photoelectric sensor 304 detects that the wire harness terminal has reached the detection station, the control system controls the servo motor 7 to drive the conveyor belt 6 to stop momentarily. At this time, the CCD camera 5 acquires images of the appearance and size of the terminal. After analysis and judgment by the vision system, it outputs a qualified or unqualified signal. If it is determined to be qualified, the terminal continues to be conveyed forward with the conveyor belt 6. If it is determined to be unqualified, the control system drives the cylinder 307 to quickly remove the defective terminal. First, cylinder 307 is activated, which drives push plate 306 to slide along cross column 302 and moves push rod 305. When push plate 306 contacts side plate 209, it continues to move. At this time, push rod 305 does not extend into clearance hole 2016 and pushes side plate 209, causing clamping plate 202 and pressure plate 204 to move, releasing the fixing of wire harness terminal. Push plate 306 continues to move, causing push rod 305 to pass through clearance hole 2016 and push wire harness terminal, pushing wire harness terminal out of positioning frame 2013, finally achieving rapid rejection of defective terminals.

[0025] In Example 4, based on Example 1, the adjustment mechanism 4 includes a U-shaped rod 401 fixed to the top of the conveyor frame 1, a top plate 301 fixedly sleeved on the outside of the U-shaped rod 401, a lifting plate 404 movably sleeved on the outside of the U-shaped rod 401, a CCD camera 5 fixed to the bottom of the lifting plate 404, a sleeve plate 402 fixedly sleeved on the middle of the outside of the U-shaped rod 401, a cylinder 403 fixedly installed at the bottom of the sleeve plate 402, and the top of the lifting plate 404 fixed to the output end of the cylinder 403. First, start cylinder 403, which drives the lifting plate 404 to slide along the U-shaped rod 401, and drives the CCD camera 5 to rise and fall, thereby adjusting the height of the CCD camera 5 as needed.

[0026] In Example 5, based on Example 1, a guide frame 8 is provided on the inner side of the conveyor frame 1. The guide frame 8 is located above the conveyor belt 6. An inclined plate 12 is fixedly connected to the inner side of the guide frame 8. A guide bucket 11 is provided below the guide frame 8. A collection box 10 is provided below the guide bucket 11. A support plate 9 is fixedly connected between the guide bucket 11, the guide frame 8 and the conveyor frame 1. When the defective terminal is pushed from the positioning frame 2013 into the guide frame 8, the defective terminal slides on the inclined plate 12 and then enters the collection box 10 through the guide bucket 11, thus realizing the collection and processing of the defective terminal.

Claims

1. A wire harness terminal inspection device based on vision recognition, comprising a conveyor frame (1), characterized in that: The inner side of the conveyor frame (1) is provided with a conveyor belt (6), a servo motor (7) for driving the conveyor belt (6) is installed on the conveyor frame (1), a fixing mechanism (2) is provided on the outer surface of the conveyor belt (6), a pushing mechanism (3) is provided on the top of the conveyor frame (1), a CCD camera (5) is provided above the conveyor belt (6), and an adjustment mechanism (4) is provided on the CCD camera (5). The fixing mechanism (2) includes a mounting plate (201) fixed to the outer surface of the conveyor belt (6). A positioning frame (2013) is fixedly connected to the top of the mounting plate (201). The positioning frame (2013) has a notch (2015) and a clearance hole (2016) on its side. The pushing mechanism (3) includes a top plate (301) fixed to the top of the conveyor frame (1), a horizontal column (302) fixedly installed on the outer side of the top plate (301), an installation plate (303) fixedly connected to the end of the horizontal column (302) away from the top plate (301), a photoelectric sensor (304) fixedly installed on the side of the installation plate (303) away from the horizontal column (302), a push plate (306) movably sleeved on the outer side of the horizontal column (302), a push rod (305) fixedly connected to the side of the push plate (306) near the positioning frame (2013), the outer diameter of the push rod (305) is equal to the inner diameter of the clearance hole (2016), a cylinder (307) fixedly installed on the outer side of the top plate (301), and the side of the push plate (306) away from the push rod (305) fixed to the output end of the cylinder (307).

2. The wire harness terminal inspection device based on vision recognition according to claim 1, characterized in that: A guide rod (206) is fixedly connected between the positioning frame (2013) and the mounting plate (201). A guide plate (205) is movably sleeved on the outside of the guide rod (206). A pressure plate (204) is fixedly connected to the bottom of the guide plate (205).

3. The wire harness terminal detection device based on vision recognition according to claim 2, characterized in that: A guide block (203) is movably sleeved on the outer side of the guide rod (206). A spring (2012) is fixedly connected between the guide block (203) and the positioning frame (2013). The spring (2012) is sleeved on the outer side of the guide rod (206). A clamping plate (202) is fixedly connected to the bottom of the guide block (203). An avoidance groove (2014) is provided on the outer side of the positioning frame (2013). The avoidance groove (2014) corresponds to the clamping plate (202).

4. The wire harness terminal detection device based on vision recognition according to claim 3, characterized in that: The top of the guide block (203) is rotatably connected to a movable rod (207), and the top of the movable rod (207) is rotatably connected to the outside of the guide plate (205).

5. The wire harness terminal detection device based on vision recognition according to claim 1, characterized in that: A square plate (2011) is fixedly connected to the outside of the positioning frame (2013). A square frame (2010) is movably sleeved on the outside of the square plate (2011). A side plate (209) is fixedly connected to the side of the square frame (2010) away from the positioning frame (2013). A movable rod (208) is rotatably connected to the outside of the square frame (2010). The end of the movable rod (208) away from the square frame (2010) is rotatably connected to the outside of the guide block (203).

6. The wire harness terminal detection device based on vision recognition according to claim 1, characterized in that: The adjustment mechanism (4) includes a U-shaped rod (401) fixed to the top of the conveyor frame (1), a top plate (301) fixedly sleeved on the outside of the U-shaped rod (401), a lifting plate (404) movably sleeved on the outside of the U-shaped rod (401), and a CCD camera (5) fixed to the bottom of the lifting plate (404).

7. The wire harness terminal detection device based on vision recognition according to claim 6, characterized in that: A sleeve plate (402) is fixedly sleeved on the middle of the outer side of the U-shaped rod (401), and a cylinder two (403) is fixedly installed at the bottom of the sleeve plate (402). The top of the lifting plate (404) is fixed on the output end of the cylinder two (403).

8. The wire harness terminal detection device based on vision recognition according to claim 1, characterized in that: The inner side of the conveyor frame (1) is provided with a guide frame (8), which is located above the conveyor belt (6). An inclined plate (12) is fixedly connected to the inner side of the guide frame (8), and a guide bucket (11) is provided below the guide frame (8).

9. A wire harness terminal detection device based on vision recognition according to claim 8, characterized in that: A collection box (10) is provided below the flow guide hopper (11), and a support plate (9) is fixedly connected between the flow guide hopper (11), the flow guide frame (8), and the conveyor frame (1).

10. A method for detecting wire harness terminals based on visual recognition as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: First, start cylinder 1 (307), which drives the push plate (306) to move and push the side plate (209), while driving the clamping plate (202) and pressure plate (204) to move and release the fixing of the wire harness terminal; Step 2: Then the push plate (306) continues to move and drives the push rod (305) to move. Subsequently, the push rod (305) passes through the clearance hole (2016) and pushes the defective terminal out of the positioning frame (2013), thereby realizing the rapid rejection of the defective terminal.

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