A method for detecting the cleanliness of automotive wire harnesses based on machine vision

Abstract

The present invention relates to the technical field of wire harness detection, and specifically relates to a method for detecting the cleanliness of an automotive wire harness based on machine vision, including a support frame. An adjusting device is provided at the front end of the support frame, and the rear end of the adjusting device penetrates into the interior of the support frame. Conveyor devices are provided at the upper end of the adjusting device and the inner bottom wall of the support frame, and a machine vision detection system is fixedly connected to the upper end of the conveyor device. By setting a rotating mechanism, the adjusting plate can drive the sliding strip to slide along the second adjusting groove under the drive of the electric conveyor belt. When the sliding strip slides into the interior of the first adjusting groove, at this time the sliding strip gradually moves away from the electric conveyor belt, and the sliding strip drives the adjusting plate to relax the scroll spring. After the scroll spring is relaxed, it rotates the arc-shaped storage sleeve, and the arc-shaped storage sleeve drives the wire harness to rotate together during the rotation process. At this time, the image acquisition unit can take photos of different angles of the end of the wire harness to achieve the effect of comprehensively detecting the end of the wire harness.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness detection, and particularly to a method for detecting the cleanliness of automotive wire harnesses based on machine vision. Background Technique

[0002] Automotive high-voltage wire harnesses connect various terminals / connectors to wire cores (copper wire cores, aluminum wire cores, etc.) through welding processes to achieve current transmission and signal transfer. Since it is difficult to ensure that the surface of each wire harness remains clean after surface processes such as heat treatment and electroplating provided by upstream suppliers, when there are contaminants at the end of the wire harness, a series of problems will occur in subsequent welding processes, such as de-welding and false welding, which affect current transmission and signal transfer. Currently, manufacturers mostly use machine vision lenses to detect the cleanliness of the wire harness ends. Traditional machine vision detection lenses can only capture a partial area of the wire harness ends, which requires multiple detection lenses to be collocated to achieve a full-range detection of the wire harness ends. This not only occupies the space of the detection equipment but also increases the cost of the equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for detecting the cleanliness of automotive wire harnesses based on machine vision to solve the above problems and improve the problems of high detection costs and narrow application ranges of existing cleanliness detection equipment.

[0004] The present invention achieves the above purpose through the following technical solutions. A device for detecting the cleanliness of automotive wire harnesses based on machine vision includes a support frame. An adjustment device is provided at the front end of the support frame, and the rear end of the adjustment device penetrates into the interior of the support frame. Conveyor devices are provided at the upper end of the adjustment device and the inner bottom wall of the support frame, and a machine vision detection system is fixedly connected to the upper end of the conveyor device. Among them, the front conveyor device includes an electric conveyor belt fixedly connected to the upper end of the adjustment device. A rotation mechanism is fixedly connected inside the electric conveyor belt, and the end of the rotation mechanism penetrates outside the electric conveyor belt. A locking mechanism is provided inside the rotation mechanism. Among them, the machine vision detection system includes a trigger unit, an image acquisition unit, a processing unit, and an alarm unit.

[0005] Preferably, the rotating mechanism includes a capsule plate fixedly connected inside the electric conveyor belt. A first adjustment groove is formed at the upper end of the capsule plate. The vertical cross-sectional shape of the first adjustment groove perpendicular to the adjustment device is V-shaped. A second adjustment groove communicating with the first adjustment groove is formed on the surface of the capsule plate. A sliding bar is slidably connected to the inner walls of the first adjustment groove and the second adjustment groove. A regulating plate is fixedly connected to the surface of the sliding bar. One end of the regulating plate away from the sliding bar penetrates to the outside of the electric conveyor belt. An installation frame fixedly connected to the electric conveyor belt is slidably connected to the surface of the regulating plate. An arc-shaped installation sleeve is fixedly connected to one end of the installation frame away from the sliding bar. An arc-shaped storage sleeve is rotatably connected to the inner wall of the arc-shaped installation sleeve. A scroll spring is fixedly connected to the surface of the arc-shaped storage sleeve. The scroll spring is always in a stretched state. One end of the scroll spring away from the arc-shaped storage sleeve penetrates the arc-shaped installation sleeve and is fixedly connected to the regulating plate.

[0006] Preferably, the sliding bar is cylindrical in shape. The vertical cross-sectional shapes of the first adjustment groove and the second adjustment groove parallel to the sliding bar are both matching T-shaped, and both the first adjustment groove and the second adjustment groove match the sliding bar.

[0007] Preferably, the center points of the arc-shaped installation sleeve and the arc-shaped storage sleeve coincide. The included angles between both ends of the arc-shaped installation sleeve and the included angles between both ends of the arc-shaped storage sleeve are both ninety degrees.

[0008] Preferably, a notch is formed at one end of the arc-shaped storage sleeve close to the regulating plate. Two installation grooves communicating with the notch are formed inside the arc-shaped storage sleeve. The locking mechanism includes a connecting shaft rotatably connected between the two installation grooves. A pressing plate is fixedly connected to the surface of the connecting shaft. Two clockwork springs are fixedly connected to the surface of the connecting shaft and are respectively fixedly connected inside the two installation grooves. The clockwork springs are always in a stretched state.

[0009] Preferably, the notch coincides with the vertical center line of the scroll spring. The width of the notch is greater than the width of the scroll spring. The cross-sectional shape of the pressing plate is an arc shape matching the arc-shaped storage sleeve, and the corners of the pressing plate are all rounded.

[0010] Preferably, the adjustment device includes a rotating handle rotatably connected to the front end of the support frame. A threaded rod is fixedly connected to the rear end of the rotating handle. The rear end of the threaded rod penetrates the support frame and is rotatably connected to the support frame. An installation frame slidably connected to the inner bottom wall of the support frame is threadedly connected to the surface of the threaded rod. The upper end of the installation frame is fixedly connected to the front electric conveyor belt.

[0011] Preferably, the adjusting device further includes uniformly distributed limiting rods, the limiting rods are fixedly connected to one side of the inner wall of the support frame, and the rear ends of the limiting rods penetrate through the mounting frame and are fixedly connected to the other side of the inner wall of the support frame.

[0012] Preferably, a storage groove communicating with the front end of the support frame is formed in the inner bottom wall of the support frame. The adjusting device further includes a tape measure slidably disposed inside the storage groove. The two ends of the tape measure are respectively fixedly connected to the front and rear ends of the mounting frame. Two guide wheels are rotatably connected to the inner surface of the tape measure and are both rotatably connected to the storage groove. The two guide wheels are drivingly connected by the tape measure.

[0013] A method for detecting the cleanliness of an automotive wire harness based on machine vision includes the following steps: The staff places the wire harness in the arc-shaped storage sleeve, and then simultaneously starts two electric conveyor belts to convey the wire harness in the direction of the machine vision detection system; when the trigger unit detects the wire harness, the trigger unit sends a trigger signal to the processing unit, and the processing unit controls the activation of the image acquisition unit according to the trigger signal; after the image acquisition unit is activated by the processing unit, the image acquisition unit starts to scan and output a frame of image and generates a corresponding analog video signal, then the image acquisition unit digitizes the analog video signal to generate a corresponding digital image, and then the image acquisition unit transmits the digital image to the processing unit; after the processing unit receives the digital image transmitted by the image acquisition unit, the processing unit stores the digital image in the memory and compares it with the preset image; if the processing unit detects dirt at the end of the wire harness in the digital image, the processing unit transmits an alarm signal to the alarm unit, and the alarm unit issues an alarm to the surrounding staff to remind the staff to re-inspect or clean the end of the wire harness. If the processing unit detects that the end of the wire harness in the digital image is clean, the processing unit does not issue any instructions; when the electric conveyor belt conveys the wire harness out of the detection range of the trigger unit, the trigger unit stops sending the trigger signal to the processing unit, and the processing unit stops the image acquisition unit from acquiring images, so that the image acquisition unit is in a waiting state.

[0014] The beneficial effects of the present invention are:

[0015] 1. By setting the rotating mechanism, the adjusting plate can drive the sliding strip to slide along the second adjusting groove under the drive of the electric conveyor belt. When the sliding strip slides into the first adjusting groove, at this time the sliding strip gradually moves away from the electric conveyor belt, and the sliding strip drives the adjusting plate to relax the scroll spring. After the scroll spring is loosened, it rotates the arc-shaped storage sleeve, and the arc-shaped storage sleeve drives the wire harness to rotate together during the rotation process. At this time, the image acquisition unit can take photos of different angles of the end of the wire harness to achieve the effect of comprehensively detecting the end of the wire harness, and this does not require multiple image acquisition units, which not only reduces the occupied space of the machine vision detection system, but also reduces the operating cost of the machine vision detection system;

[0016] 2. By setting up a locking mechanism, the scroll spring presses against the pressure plate during rotation, causing the pressure plate to rotate under the force along the connecting shaft until the pressure plate presses against the wire harness. At this time, the wire harness is pressed against the inner wall of the arc-shaped storage sleeve by the pressure plate, and the arc-shaped storage sleeve can drive the wire harness to rotate stably. And when the scroll spring separates from the pressure plate, the clockwork spring can reset the pressure plate automatically through the connecting shaft, blocking the wire harness at this time, so that the staff can easily take out the wire harness;

[0017] 3. By setting up an adjustment device, when the staff needs to detect wire harnesses of different lengths, the staff only needs to rotate the rotary handle in the corresponding direction. The rotary handle drives the threaded rod to rotate, and the threaded rod drives the mounting bracket to move through rotation. The mounting bracket can drive the front conveying device and the front machine vision detection system to move together. During the adjustment process, the mounting bracket drives the tape measure to move, and the tape measure rotates along the guide wheel. The staff only needs to observe the reading of the tape measure in the storage slot to intuitively obtain the distance between the front and rear conveying devices, enabling the staff to adjust more precisely. This expands the applicable range of the entire equipment and has a relatively significant improvement effect;

[0018] 4. By setting up a machine vision detection system, when the trigger unit detects that a wire harness passes through, the processing unit controls the image acquisition unit to capture the end of the wire harness, and then the processing unit compares it with the preset image. If there is dirt at the end of the wire harness, the alarm unit promptly warns the surrounding staff to come and deal with it, which effectively improves the detection efficiency of the wire harness end cleanliness detection pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic layout diagram of the machine vision detection system and the conveying device in the present invention;

[0021] Figure 3 is a schematic structural diagram of a partial structure cut of the adjustment device in the present invention;

[0022] Figure 4 is Figure 3 an enlarged view of A in

[0023] Figure 5 is a schematic vertical sectional view of the conveying device in the present invention;

[0024] Figure 6 is a schematic structural diagram of the scroll spring being stretched in the present invention;

[0025] Figure 7 is a schematic structural diagram of the scroll spring being released in the present invention;

[0026] Figure 8 isFigure 7 Vertical cross-sectional schematic diagram;

[0027] Figure 9 Schematic diagram of the partial structure of the positioning mechanism in the present invention;

[0028] Figure 10 Operation flowchart of the machine vision detection system in the present invention.

[0029] In the figure: 1, support frame; 11, storage groove; 2, machine vision detection system; 21, trigger unit; 22, image acquisition unit; 23, processing unit; 24, alarm unit; 3, adjustment device; 31, rotating handle; 32, threaded rod; 33, mounting bracket; 34, limiting rod; 35, tape measure; 36, guide wheel; 4, conveying device; 41, electric conveyor belt; 42, rotating mechanism; 4201, capsule plate; 4202, first adjustment groove; 4203, second adjustment groove; 4204, slide bar; 4205, adjustment plate; 4206, mounting frame; 4207, arc-shaped mounting sleeve; 4208, arc-shaped storage sleeve; 4209, volute spring; 4210, notch; 4211, mounting groove; 43, locking mechanism; 431, connecting shaft; 432, pressing plate; 433, hairspring. Detailed implementation mode

[0030] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] During specific implementation: As Figures 1-10 shown, a machine vision-based automotive wire harness cleanliness detection device includes a support frame 1. An adjustment device 3 is provided at the front end of the support frame 1. The rear end of the adjustment device 3 penetrates into the interior of the support frame 1. Conveying devices 4 are provided on both the upper end of the adjustment device 3 and the inner bottom wall of the support frame 1. A machine vision detection system 2 is fixedly connected to the upper end of the conveying device 4; among them, the front conveying device 4 includes an electric conveyor belt 41 fixedly connected to the upper end of the adjustment device 3. A rotating mechanism 42 is fixedly connected inside the electric conveyor belt 41. The end of the rotating mechanism 42 penetrates to the outside of the electric conveyor belt 41. A locking mechanism 43 is provided inside the rotating mechanism 42; among them, the machine vision detection system 2 includes a trigger unit 21, an image acquisition unit 22, a processing unit 23, and an alarm unit 24.

[0032] As Figures 5-9As shown, the rotating mechanism 42 includes a capsule plate 4201 fixedly connected inside the electric conveyor belt 41. A first adjustment groove 4202 is formed at the upper end of the capsule plate 4201. The vertical cross-sectional shape of the first adjustment groove 4202 perpendicular to the adjustment device 3 is V-shaped. A second adjustment groove 4203 communicating with the first adjustment groove 4202 is formed on the surface of the capsule plate 4201. A slide bar 4204 is slidably connected to the inner walls of the first adjustment groove 4202 and the second adjustment groove 4203. An adjustment plate 4205 is fixedly connected to the surface of the slide bar 4204. One end of the adjustment plate 4205 away from the slide bar 4204 penetrates to the outside of the electric conveyor belt 41. An installation frame 4206 fixedly connected to the electric conveyor belt 41 is slidably connected to the surface of the adjustment plate 4205. An arc-shaped installation sleeve 4207 is fixedly connected to one end of the installation frame 4206 away from the slide bar 4204. An arc-shaped storage sleeve 4208 is rotatably connected to the inner wall of the arc-shaped installation sleeve 4207. A scroll spring 4209 is fixedly connected to the surface of the arc-shaped storage sleeve 4208. The scroll spring 4209 is always in a stretched state. One end of the scroll spring 4209 away from the arc-shaped storage sleeve 4208 penetrates the arc-shaped installation sleeve 4207 and is fixedly connected to the adjustment plate 4205 {The first adjustment groove 4202 is just within the shooting range of the image acquisition unit 22. The moving distance from the highest point of the first adjustment groove 4202 to the highest point of the first adjustment groove 4202 is just enough to enable the scroll spring 4209 to drive the wire harness to rotate 360 degrees through the arc-shaped storage sleeve 4208}; The shape of the slide bar 4204 is cylindrical. The vertical cross-sectional shapes of the first adjustment groove 4202 and the second adjustment groove 4203 parallel to the slide bar 4204 are both T-shaped and match the slide bar 4204; The center points of the arc-shaped installation sleeve 4207 and the arc-shaped storage sleeve 4208 coincide. The angle between the two ends of the arc-shaped installation sleeve 4207 and the angle between the two ends of the arc-shaped storage sleeve 4208 are both 90 degrees {By setting the rotating mechanism 42, the adjustment plate 4205 can drive the slide bar 4204 to slide along the second adjustment groove 4203 under the drive of the electric conveyor belt 41. When the slide bar 4204 slides into the first adjustment groove 4202, at this time the slide bar 4204 gradually moves away from the electric conveyor belt 41. The slide bar 4204 drives the adjustment plate 4205 to relax the scroll spring 4209. After the scroll spring 4209 is relaxed, it rotates the arc-shaped storage sleeve 4208. The arc-shaped storage sleeve 4208 drives the wire harness to rotate together during the rotation process. At this time, the image acquisition unit 22 can take photos of different angles of the end of the wire harness to achieve the effect of detecting the end of the wire harness in all directions, and this does not require multiple image acquisition units 22 to be matched, which not only reduces the occupied space of the machine vision detection system 2, but also reduces the operating cost of the machine vision detection system 2}.

[0033] As Figures 6-9As shown, a notch 4210 is provided at one end of the arc-shaped storage sleeve 4208 close to the adjusting plate 4205. Two mounting grooves 4211 that are both communicated with the notch 4210 are provided inside the arc-shaped storage sleeve 4208. The locking mechanism 43 includes a connecting shaft 431 rotatably connected between the two mounting grooves 4211. A pressing plate 432 is fixedly connected to the surface of the connecting shaft 431. Two winding springs 433 are fixedly connected to the surface of the connecting shaft 431 and are respectively fixedly connected inside the two mounting grooves 4211. The winding springs 433 are always in a stretched state; the notch 4210 coincides with the vertical center line of the scroll spring 4209. The width of the notch 4210 is greater than the width of the scroll spring 4209. The cross-sectional shape of the pressing plate 432 is an arc shape matching the arc-shaped storage sleeve 4208, and the corners of the pressing plate 432 are all rounded {By setting the locking mechanism 43, the scroll spring 4209 presses the pressing plate 432 during rotation, so that the pressing plate 432 rotates along the force of the connecting shaft 431 until the pressing plate 432 presses the wire harness. At this time, the wire harness is pressed against the inner wall of the arc-shaped storage sleeve 4208 by the pressing plate 432, and the arc-shaped storage sleeve 4208 can drive the wire harness to rotate stably. And when the scroll spring 4209 is separated from the pressing plate 432, the winding spring 433 can reset the pressing plate 432 through the connecting shaft 431 by itself, so as to block the wire harness at this time, so that the staff can easily take out the wire harness}.

[0034] As Figures 2-4As shown, the adjusting device 3 includes a rotating handle 31 rotatably connected to the front end of the supporting frame 1, and the rear end of the rotating handle 31 is fixedly connected to a threaded rod 32, the rear end of the threaded rod 32 penetrates the supporting frame 1 and is rotatably connected to the supporting frame 1, the surface of the threaded rod 32 is threadedly connected to a mounting bracket 33 slidably connected to the inner bottom wall of the supporting frame 1, and the upper end of the mounting bracket 33 is fixedly connected to the front electric conveyor belt 41; the adjusting device 3 also includes evenly distributed limit rods 34, the limit rods 34 are fixedly connected to one side of the inner wall of the supporting frame 1, the rear end of the limit rods 34 penetrates the mounting bracket 33 and is fixedly connected to the other side of the inner wall of the supporting frame 1; the inner bottom wall of the supporting frame 1 is provided with a storage groove 11 connected to the front end of the supporting frame 1, and the adjusting device 3 also includes a tape measure 35 slidably arranged inside the storage groove 11, and the two ends of the tape measure 35 are respectively fixedly connected to the front and rear ends of the mounting bracket 33, and the inner There are two guide wheels 36 rotatably connected to the surface and both are rotatably connected to the storage slot 11. The two guide wheels 36 are connected by a tape measure 35. {By setting the adjustment device 3, when the staff needs to detect wire harnesses of different lengths, the staff only needs to rotate the rotating handle 31 in the corresponding direction, and the rotating handle 31 drives the threaded rod 32 to rotate. The threaded rod 32 drives the mounting frame 33 to move by rotation. The mounting frame 33 can drive the front conveying device 4 and the front machine vision inspection system 2 to move together. During the adjustment process, the mounting frame 33 drives the tape measure 35 to move, and the tape measure 35 rotates along the guide wheel 36. The staff only needs to observe the indication of the tape measure 35 in the storage slot 11 to intuitively obtain the distance between the front and rear conveying devices 4, so that the staff can adjust more accurately, which expands the application range of the entire equipment and has a more significant improvement effect}.

[0035] like Figure 10As shown in the figure, a method for detecting the cleanliness of automotive wiring harnesses based on machine vision includes the following steps: The staff places the wiring harness in the arc-shaped storage sleeve 4208, and then simultaneously starts two electric conveyor belts 41 to convey the wiring harness in the direction of the machine vision detection system 2; when the trigger unit 21 detects the wiring harness, the trigger unit 21 sends a trigger signal to the processing unit 23, and the processing unit 23 controls the activation of the image acquisition unit 22 according to the trigger signal; after the image acquisition unit 22 is activated by the processing unit 23, the image acquisition unit 22 starts the scanning and output of a frame of image and generates a corresponding analog video signal, then the image acquisition unit 22 digitizes the analog video signal to generate a corresponding digital image, and then the image acquisition unit 22 transmits the digital image to the processing unit 23; after receiving the digital image transmitted by the image acquisition unit 22, the processing unit 23 stores the digital image in the memory and compares it with the preset image; if the processing unit 23 detects dirt at the end of the wiring harness in the digital image, the processing unit 23 transmits an alarm signal to the alarm unit 24, and the alarm unit 24 issues an alarm to the surrounding staff to remind the staff to recheck or clean the end of the wiring harness. If the processing unit 23 detects that the end of the wiring harness in the digital image is clean, the processing unit 23 does not issue any instructions; when the electric conveyor belt 41 conveys the wiring harness out of the detection range of the trigger unit 21, the trigger unit 21 stops sending the trigger signal to the processing unit 23, and the processing unit 23 stops the image acquisition unit 22 from acquiring images, so that the image acquisition unit 22 is in a waiting state.

[0036] When the present invention is in use, when the device is operating normally, the staff only needs to put the wire harnesses into the two arc-shaped storage sleeves 4208 on the same vertical line respectively. The electric conveyor belt 41 conveys them in the direction of the wire harness machine vision detection system 2 through the installation frame 4206, the arc-shaped installation sleeve 4207 and the arc-shaped storage sleeve 4208. While the installation frame 4206 is moving, the installation frame 4206 drives the adjusting plate 4205 to move together. The adjusting plate 4205 drives the slide bar 4204 to slide along the second adjusting groove 4203. When the slide bar 4204 slides into the first adjusting groove 4202 along the second adjusting groove 4203, the slide bar 4204 gradually moves away from the electric conveyor belt 41. The slide bar 4204 drives the adjusting plate 4205 to gradually move downward. At this time, the adjusting plate 4205 relaxes the scroll spring 4209. After the scroll spring 4209 is relaxed, it pushes back the arc-shaped storage sleeve 4208, so that the arc-shaped storage sleeve 4208 rotates along the inner wall of the arc-shaped installation sleeve 4207. During the rotation process, the scroll spring 4209 presses the pressing plate 432, so that the pressing plate 432 rotates under the force along the connecting shaft 431 until the pressing plate 432 presses the wire harness. At this time, the wire harness is pressed against the inner wall of the arc-shaped storage sleeve 4208 by the pressing plate 432. The arc-shaped storage sleeve 4208 drives the wire harness to rotate together during the rotation process. The image acquisition unit 22 can then take photos of different angles of the end of the wire harness to achieve the effect of comprehensively detecting the end of the wire harness. And this does not require multiple image acquisition units 22 to be matched, which not only reduces the occupied space of the machine vision detection system 2, but also reduces the operating cost of the machine vision detection system 2.

[0037] It should be noted that in the above description, the trigger unit 21, the image acquisition unit 22, the processing unit 23, the alarm unit 24 and the electric conveyor belt 41 are all devices with relatively mature applications in the prior art. The specific models can be selected according to actual needs. At the same time, the power supply of the trigger unit 21, the image acquisition unit 22, the processing unit 23, the alarm unit 24 and the electric conveyor belt 41 can be powered by an internal power supply or by mains power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0038] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automotive wire harness cleanliness detection device based on machine vision, comprising a support frame (1), characterized in that: The front end of the support frame (1) is provided with an adjusting device (3). The rear end of the adjusting device (3) penetrates into the interior of the support frame (1). Both the upper end of the adjusting device (3) and the inner bottom wall of the support frame (1) are provided with a conveying device (4). The upper end of the conveying device (4) is fixedly connected with a machine vision detection system (2). Among them, the front conveying device (4) includes an electric conveyor belt (41) fixedly connected to the upper end of the adjusting device (3). A rotating mechanism (42) is fixedly connected inside the electric conveyor belt (41). The end of the rotating mechanism (42) penetrates to the outside of the electric conveyor belt (41). A locking mechanism (43) is arranged inside the rotating mechanism (42). Among them, the machine vision detection system (2) includes a trigger unit (21), an image acquisition unit (22), a processing unit (23) and an alarm unit (24). The rotating mechanism (42) includes a capsule plate (4201) fixedly connected inside the electric conveyor belt (41). A first adjustment groove (4202) is opened at the upper end of the capsule plate (4201). The vertical cross-sectional shape of the first adjustment groove (4202) perpendicular to the adjusting device (3) is V-shaped. A second adjustment groove (4203) communicating with the first adjustment groove (4202) is opened on the surface of the capsule plate (4201). A slide bar (4204) is slidably connected to the inner walls of the first adjustment groove (4202) and the second adjustment groove (4203). An adjustment plate (4205) is fixedly connected to the surface of the slide bar (4204). One end of the adjustment plate (4205) away from the slide bar (4204) penetrates to the outside of the electric conveyor belt (41). An installation frame (4206) fixedly connected to the electric conveyor belt (41) is slidably connected to the surface of the adjustment plate (4205). An arc-shaped installation sleeve (4207) is fixedly connected to one end of the installation frame (4206) away from the slide bar (4204). An arc-shaped object placement sleeve (4208) is rotatably connected to the inner wall of the arc-shaped installation sleeve (4207). A scroll spring (4209) is fixedly connected to the surface of the arc-shaped object placement sleeve (4208). The scroll spring (4209) is always in a stretched state. One end of the scroll spring (4209) away from the arc-shaped object placement sleeve (4208) penetrates the arc-shaped installation sleeve (4207) and is fixedly connected to the adjustment plate (4205).

2. The automotive wire harness cleanliness detection device based on machine vision according to claim 1, wherein: The shape of the slide bar (4204) is cylindrical. The vertical cross-sectional shapes of the first adjustment groove (4202) and the second adjustment groove (4203) parallel to the slide bar (4204) are both T-shaped and matching. Both the first adjustment groove (4202) and the second adjustment groove (4203) match the slide bar (4204).

3. The automotive wire harness cleanliness detection device based on machine vision according to claim 1, wherein: The center points of the arc-shaped installation sleeve (4207) and the arc-shaped object placement sleeve (4208) coincide. The included angle between the two ends of the arc-shaped installation sleeve (4207) and the included angle between the two ends of the arc-shaped object placement sleeve (4208) are both ninety degrees.

4. The vehicle wiring harness cleanliness detection device based on machine vision according to claim 1, characterized in that: A notch (4210) is provided at one end of the arc-shaped storage cover (4208) close to the adjustment plate (4205); two mounting grooves (4211) are provided inside the arc-shaped storage cover (4208) and are both connected to the notch (4210); the locking mechanism (43) comprises a connecting shaft (431) rotatably connected between the two mounting grooves (4211); a pressing plate (432) is fixedly connected to the surface of the connecting shaft (431); two springs (433) are fixedly connected to the surface of the connecting shaft (431) and are respectively fixedly connected to the inside of the two mounting grooves (4211); the springs (433) are always in a stretched state.

5. The automotive wire harness cleanliness detection device based on machine vision according to claim 4, characterized in that: The notch (4210) coincides with the vertical center line of the scroll spring (4209); the width of the notch (4210) is greater than the width of the scroll spring (4209); the cross-sectional shape of the pressure plate (432) is an arc shape that matches the arc-shaped storage sleeve (4208); and the corners of the pressure plate (432) are all rounded.

6. The automotive wire harness cleanliness detection device based on machine vision according to claim 1, characterized in that: The adjusting device (3) comprises a rotating handle (31) rotatably connected to the front end of the supporting frame (1); a threaded rod (32) is fixedly connected to the rear end of the rotating handle (31); the rear end of the threaded rod (32) penetrates the supporting frame (1) and is rotatably connected to the supporting frame (1); a mounting frame (33) is threadedly connected to the inner bottom wall of the supporting frame (1) on the surface of the threaded rod (32); and the upper end of the mounting frame (33) is fixedly connected to the electric conveyor belt (41) in front.

7. The automotive wire harness cleanliness detection device based on machine vision according to claim 6, wherein: The regulating device (3) further comprises evenly distributed limiting rods (34), wherein the limiting rods (34) are fixedly connected to one side of the inner wall of the supporting frame (1), and the rear end of the limiting rods (34) passes through the mounting frame (33) and is fixedly connected to the other side of the inner wall of the supporting frame (1).

8. The automotive wire harness cleanliness detection device based on machine vision according to claim 6, characterized in that: The inner bottom wall of the support frame (1) is provided with a storage groove (11) which is connected to the front end of the support frame (1). The adjustment device (3) further comprises a tape measure (35) which is slidably arranged inside the storage groove (11). The two ends of the tape measure (35) are respectively fixedly connected to the front and rear ends of the mounting frame (33). The inner surface of the tape measure (35) is rotatably connected to two guide wheels (36) which are both rotatably connected to the storage groove (11). The two guide wheels (36) are transmission-connected via the tape measure (35).

9. A method for detecting the cleanliness of automotive wiring harnesses based on machine vision, including the device for detecting the cleanliness of automotive wiring harnesses based on machine vision according to any one of claims 1-8, characterized in that: The steps include: S1: The staff places the wire harness in the arc-shaped storage sleeve (4208), and then simultaneously starts two electric conveyor belts (41) to convey the wire harness in the direction of the machine vision inspection system (2); S2: When the trigger unit (21) detects the wire harness, the trigger unit (21) sends a trigger signal to the processing unit (23), and the processing unit (23) controls the image acquisition unit (22) to start according to the trigger signal; S4: After the image acquisition unit (22) is activated by the processing unit (23), the image acquisition unit (22) starts the scanning and output of a frame of image and generates a corresponding analog video signal. Then, the image acquisition unit (22) digitizes the analog video signal to generate a corresponding digital image, and then the image acquisition unit (22) transmits the digital image to the processing unit (23). S5: After receiving the digital image transmitted by the image acquisition unit (22), the processing unit (23) stores the digital image in the memory and compares it with a preset image. S6: If the processing unit (23) detects dirt at the end of the wire harness in the digital image, the processing unit (23) transmits an alarm signal to the alarm unit (24), and the alarm unit (24) issues an alarm to the surrounding staff to remind the staff to re-inspect or clean the end of the wire harness. If the processing unit (23) detects that the end of the wire harness in the digital image is clean, the processing unit (23) does not issue any instructions. S7: When the electric conveyor belt (41) conveys the wire harness out of the detection range of the trigger unit (21), the trigger unit (21) stops sending a trigger signal to the processing unit (23), and the processing unit (23) stops the image acquisition unit (22) from acquiring images, so that the image acquisition unit (22) is in a waiting state.

Images