A machine vision-based cable protection pipe detection device and use method

Abstract

The application provides a kind of cable protection pipe detection device based on machine vision and use method, it is related to visual detection technical field.Cable protection pipe detection device based on machine vision includes: wave board, wave board has first downhill section, first uphill section, second downhill section, second uphill section and third downhill section, the top end height of first downhill section is greater than the top end of first uphill section, the top end of first uphill section is higher than the top end of second downhill section, to enable cable protection pipe can be with self gravity in turn on first downhill section, first uphill section, second downhill section, second uphill section and third downhill section roll;CCD camera is located in wave board, the lens of CCD camera is towards first uphill section and second uphill section.The cable protection pipe of the application completely relies on self gravity and rolls through each section in turn, does not need motor, chain or clamping roller and any external tool drive, eliminates the risk that related tool causes scratch and secondary damage to cable protection pipe surface.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, and in particular to a cable protection pipe inspection device and its usage method based on machine vision. Background Technology

[0002] As a crucial protective component in power cable laying, the surface quality of cable protection pipes directly affects their mechanical strength, weather resistance, and ease of cable installation. Therefore, a comprehensive defect inspection of the pipe surface is necessary before shipment. Currently, the detection of surface defects mainly relies on manual visual inspection or semi-automated machine-assisted vision systems. Manual inspection is limited by factors such as human fatigue and subjective judgment differences, resulting in low efficiency and difficulty in ensuring consistency. To improve inspection efficiency, the industry is gradually introducing automated inspection equipment based on machine vision. Such equipment typically uses mechanisms such as conveyor belts, clamping rollers, or chain-driven wheels to drive the pipe in a linear or helical manner, while simultaneously deploying multiple cameras online to capture images of the pipe surface.

[0003] However, during the movement of the pipe, the transmission components in this type of mechanical transmission system continuously come into contact and rub against the pipe wall, easily creating new scratches, indentations, or wear on the surface of the pipe being inspected. This makes the inspection itself a process that damages the pipe. Furthermore, to obtain a fully unfolded image of the pipe, conventional equipment often requires multiple cameras to simultaneously capture images from different angles, or the addition of complex rotating mechanisms to make the pipe rotate. This not only increases equipment cost and structural complexity but also poses significant challenges to the system's synchronous control and image stitching. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a machine vision-based cable protection pipe inspection device and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A machine vision-based cable protection pipe inspection device includes: The corrugated plate has a first downhill section, a first uphill section, a second downhill section, a second uphill section, and a third downhill section. The top of the first downhill section is higher than the top of the first uphill section, and the top of the first uphill section is higher than the top of the second uphill section, so that the cable protection pipe can roll sequentially on the first downhill section, the first uphill section, the second downhill section, the second uphill section, and the third downhill section by its own weight. A CCD camera is installed inside the wave plate, with the camera lens facing the first and second uphill sections.

[0006] Preferably, the corrugated plate also includes a feeding platform and a discharging platform, with the feeding platform connected to the top of the first downhill section and the discharging platform connected to the bottom of the third downhill section.

[0007] Preferably, the first downhill section, the first uphill section, the second downhill section, the second uphill section, and the third downhill section are made of quartz glass.

[0008] Preferably, the machine vision-based cable protection pipe detection device further includes a pneumatic mechanism located at the crest of the corrugated plate. The pneumatic mechanism includes an arc-shaped capsule and a rubber column. The arc-shaped capsule has a hollow structure inside. The rubber column is located in the middle of the inside of the arc-shaped capsule and divides the inner cavity of the arc-shaped capsule into a first chamber and a second chamber. Multiple first blow holes are opened on the arc-shaped surface of the arc-shaped capsule corresponding to the first chamber, and multiple second blow holes are opened on the arc-shaped surface of the arc-shaped capsule corresponding to the second chamber.

[0009] Preferably, both the first and second blow holes are inclined, and the inclination direction is toward the rolling direction of the cable protection pipe.

[0010] Preferably, the arc-shaped capsule is installed at the crest between the first uphill section and the second downhill section, and at the crest between the second uphill section and the third downhill section. When the cable protection tube rolls to the crest and presses the arc-shaped capsule, the cable protection tube first compresses the first chamber, forcing the gas in the first chamber to be ejected only from the first blow hole, so as to purify the surface of the cable protection tube or assist its rotation. As the cable protection tube continues to roll, it then compresses the second chamber, forcing the gas in the second chamber to be ejected only from the second blow hole.

[0011] Preferably, the machine vision-based cable protection pipe inspection device further includes an electrostatic dust removal mechanism. The electrostatic dust removal mechanism includes an air pump, an electrostatic generator, an ion air duct, and an outlet air duct. The air outlet of the air pump is connected to the air inlet of the electrostatic generator, the air outlet of the electrostatic generator is connected to the air inlet of the ion air duct, and the air outlet of the ion air duct is connected to the outlet air duct. The outlet air duct is fixed on the first downhill section and the second downhill section, and the air outlet of the outlet air duct faces the surface of the corrugated plate to blow ion air onto the surface of the cable protection pipe that is being rolled over for electrostatic dust removal.

[0012] Preferably, the machine vision-based cable protection pipe detection device further includes a pushing mechanism, which includes a turntable, a lever, and a motor. The output shaft of the motor is connected to the turntable to drive the turntable to rotate. One end of the lever is fixed on the turntable. A positioning protrusion is provided on the feeding platform. When the turntable rotates, it drives the lever to rotate. The lever pushes the cable protection pipe located on the feeding platform, so that the cable protection pipe passes over the positioning protrusion and enters the top of the first downhill section.

[0013] Preferably, the machine vision-based cable protection pipe inspection device further includes baffles, which are fixed to both sides of the corrugated plate.

[0014] A method for using a machine vision-based cable protection pipe inspection device, based on the above-mentioned machine vision-based cable protection pipe inspection device, includes the following steps: S1: Push the cable protection pipe to the first downhill section. The cable protection pipe rolls up the first uphill section due to gravity, and the CCD camera at the corresponding position takes a picture. S2: The cable protection pipe continues to roll up the second downhill section to the second uphill section by gravity, and the CCD camera at the corresponding position takes a picture. S3: The cable protection pipe continues to roll down the third downhill section by gravity.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By setting a progressively higher drop, with the top of the first downhill section higher than the top of the first uphill section, and the top of the first uphill section higher than the top of the second uphill section, the cable protection pipe rolls through each section entirely under its own weight. No external tools such as motors, chains, or clamping rollers are needed, eliminating the risk of scratches and secondary damage to the pipe's surface. The cable protection pipe's speed naturally decreases and its movement is most stable during the uphill section, allowing the CCD camera to capture clear, motion-free images at this stage. Simultaneously, as the cable protection pipe rolls and rotates, the CCD camera continuously captures and stitches together a fully unfolded image of the pipe's entire circumference, achieving comprehensive detection of surface defects with a minimalist structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cable protection pipe detection device based on machine vision proposed in this invention. Figure 2 This is a side view of the cable protection pipe detection device based on machine vision proposed in this invention; Figure 3 This is a schematic diagram of the pneumatic mechanism in the machine vision-based cable protection pipe inspection device proposed in this invention. Figure 1 ; Figure 4 This is a schematic diagram of the pneumatic mechanism in the machine vision-based cable protection pipe inspection device proposed in this invention. Figure 2 ; Figure 5 for Figure 2 Enlarged view of the structure at point A in the image; Figure 6 This is a schematic diagram of the material pushing mechanism in the cable protection pipe inspection device based on machine vision proposed in this invention.

[0017] In the diagram: 1. Corrugated plate; 11. Feeding platform; 111. Positioning protrusion; 12. First downhill section; 13. First uphill section; 14. Second downhill section; 15. Second uphill section; 16. Third downhill section; 17. Discharge platform; 2. Pneumatic mechanism; 21. Arc-shaped capsule; 22. Rubber column; 23. First chamber; 231. First blow-off hole; 24. Second chamber; 241. Second blow-off hole; 3. Baffle; 4. Pushing mechanism; 41. Turntable; 42. Lever; 43. Motor; 5. Electrostatic dust removal mechanism; 51. Air pump; 52. Electrostatic generator; 54. Ion air duct; 55. Air outlet duct; 6. CCD camera; 100. Cable protection pipe. Detailed Implementation

[0018] 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.

[0019] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This invention provides a machine vision-based cable protection pipe inspection device, comprising: The wave plate 1 has a first downhill section 12, a first uphill section 13, a second downhill section 14, a second uphill section 15 and a third downhill section 16. The top height of the first downhill section 12 is greater than the top height of the first uphill section 13, and the top height of the first uphill section 13 is higher than the top height of the second uphill section 15, so that the cable protection pipe 100 can roll sequentially on the first downhill section 12, the first uphill section 13, the second downhill section 14, the second uphill section 15 and the third downhill section 16 by its own weight. CCD camera 6 is installed inside wave plate 1, with the lens of CCD camera 6 facing the first uphill section 13 and the second uphill section 15.

[0020] Specifically, the top of the first downhill section 12 is the highest point of the entire wave plate 1, and its height is greater than the top of the first uphill section 13. The top of the first uphill section 13 is greater than the top of the second uphill section 15, thus forming a gradually decreasing potential energy gradient. After the cable protection pipe 100 to be tested is placed at the top of the first downhill section 12, it accelerates and rolls down the first downhill section 12 under the action of gravity. Using the kinetic energy gained from the downhill, it rushes up the first uphill section 13, then slides from the first uphill section 13 into the second downhill section 14, and then passes through the second uphill section 15 in the same way, finally rolling out from the third downhill section 16. The CCD camera 6 is installed in a receiving cavity opened inside the wave plate 1, with its lens facing obliquely upward, directly facing the lower surface of the first uphill section 13 and the second uphill section 15. When the cable protection pipe 100 rolls through these two uphill sections, the CCD camera 6 continuously captures images of the surface of the cable protection pipe 100.

[0021] In this optional embodiment, by setting a progressive drop where the top of the first downhill section 12 is higher than the top of the first uphill section 13, and the top of the first uphill section 13 is higher than the top of the second uphill section 15, the cable protection pipe 100 rolls through each section entirely by its own weight, without the need for any external tools such as motors, chains, or clamping rollers, thus eliminating the risk of scratching and secondary damage to the surface of the cable protection pipe 100 caused by such tools. When the cable protection pipe 100 rolls on the uphill section, its speed naturally decreases, and its movement is most stable. During this stage, the CCD camera 6 can capture clear, blur-free images. Simultaneously, as the cable protection pipe 100 rolls and rotates, the CCD camera 6 can continuously capture and stitch together a fully unfolded image of the cable protection pipe 100's entire circumference, achieving comprehensive detection of appearance defects of the cable protection pipe 100 with a minimalist structure.

[0022] Optionally, the corrugated plate 1 also includes a feeding platform 11 and a discharging platform 17, with the feeding platform 11 connected to the top of the first downhill section 12 and the discharging platform 17 connected to the bottom of the third downhill section 16.

[0023] Specifically, the feeding platform 11 is fixedly connected to the top of the first downslope section 12, providing a horizontal or slightly inclined temporary storage area where the cable protection tube 100 to be inspected can temporarily stop and wait for feeding. A discharge platform 17 is added at the outlet end of the corrugated plate 1, and the discharge platform 17 is fixedly connected to the bottom end of the third downslope section 16, forming the receiving surface for the cable protection tube 100. After the cable protection tube 100 has completed inspection, it rolls out from the third downslope section 16 and slides into the discharge platform 17, where it stops and waits to be taken away or proceed to the next process.

[0024] In this optional embodiment, the feeding platform 11 provides a buffer positioning area for the cable protection tube 100, enabling the cable protection tube 100 to obtain a stable initial posture before being pushed, avoiding impact and posture instability caused by direct throwing into the inclined section. The discharge platform 17 receives the cable protection tube 100 rolling out at high speed, allowing it to decelerate smoothly and leave the detection device in an orderly manner, preventing the cable protection tube 100 from falling directly and causing collision damage. The setting of the two platforms allows the rolling detection function of the corrugated plate 1 to be easily integrated into the production line. The cable protection tube 100 produced by the upstream pipe cutting or extrusion equipment is fed in through the feeding platform 11, and after detection, it is output by the discharge platform 17 to the packaging or palletizing station, realizing the powerless connection between the detection unit and the upstream and downstream processes.

[0025] Furthermore, the first downhill section 12, the first uphill section 13, the second downhill section 14, the second uphill section 15, and the third downhill section 16 are made of quartz glass.

[0026] Specifically, the quartz glass plate has excellent light transmittance, and the surface of each slope section is optically polished, making it flat and smooth. When the cable protection pipe 100 rolls, it comes into direct contact with the surface of the quartz glass plate, while the CCD camera 6 is located inside the corrugated plate 1. Its lens takes pictures from bottom to top through the transparent quartz glass plate. The light path propagates in a straight line in the uniform glass medium, without obstruction or distortion, directly acquiring a high-definition image of the surface of the cable protection pipe 100.

[0027] In this optional embodiment, the quartz glass has high hardness and good wear resistance. Even after long-term rolling friction of the cable protection tube 100, it can still maintain a smooth surface and light transmittance. At the same time, the smooth surface has a moderate coefficient of friction, which is conducive to the smooth rotation of the cable protection tube 100 and avoids wear on the cable protection tube 100.

[0028] Optionally, the machine vision-based cable protection pipe detection device further includes a pneumatic mechanism 2, which is located at the crest of the corrugated plate 1. The pneumatic mechanism 2 includes an arc-shaped capsule 21 and a rubber column 22. The arc-shaped capsule 21 has a hollow structure inside. The rubber column 22 is located in the middle of the arc-shaped capsule 21 and divides the inner cavity of the arc-shaped capsule 21 into a first chamber 23 and a second chamber 24. The arc-shaped surface of the arc-shaped capsule 21 corresponding to the first chamber 23 is provided with a plurality of first blow holes 231, and the arc-shaped surface of the arc-shaped capsule 21 corresponding to the second chamber 24 is provided with a plurality of second blow holes 241.

[0029] Specifically, the arc-shaped capsule 21 is an arc-shaped strip-shaped bladder that matches the outer diameter curvature of the cable protection tube 100. It is made of wear-resistant rubber and has an internal air cavity. A rubber column 22 is integrally connected to the middle of the inner cavity along the length of the arc-shaped capsule 21, completely isolating the inner cavity into a first chamber 23 and a second chamber 24 arranged back-to-back along the rolling direction of the cable protection tube 100. Multiple first blow holes 231 are evenly distributed along the arc surface on the outer arc surface of the arc-shaped capsule 21 corresponding to the first chamber 23, and multiple second blow holes 241 are opened on the outer arc surface corresponding to the second chamber 24. Both sets of blow holes penetrate the capsule wall and communicate with the corresponding chambers. When the cable protection tube 100 has not rolled to the crest, the arc-shaped capsule 21 is in a naturally inflated state, and both the first chamber 23 and the second chamber 24 are filled with atmospheric pressure air.

[0030] In this optional embodiment, the crest of the wave plate 1 is the turning point where potential energy is converted into kinetic energy. When the cable protection tube 100 rolls to this point, its speed drops to the minimum, making it prone to getting stuck or stopping its rotation due to static friction, which prevents the subsequent CCD camera 6 from completing full-circle image acquisition. The pneumatic mechanism 2 uses the weight of the tube to compress the airflow generated by the arc-shaped capsule 21, providing the cable protection tube 100 with the auxiliary power needed to cross the crest and maintaining its rotational motion at the crest. Since the inner cavity of the arc-shaped capsule 21 is divided into an independent first chamber 23 and a second chamber 24 by the rubber column 22, the two chambers are compressed sequentially when the cable protection tube 100 rolls the airbag, providing a jet of air on the arc surface before and after the crest, forming a relay-style auxiliary propulsion. The range and duration of action are superior to those of a single-chamber airbag.

[0031] Furthermore, both the first blow hole 231 and the second blow hole 241 are inclined, and the inclination direction is toward the rolling direction of the cable protection tube 100.

[0032] Specifically, both the first blowhole 231 and the second blowhole 241 are opened at an angle on the arc-shaped surface of the arc-shaped capsule 21, and the inclination direction of the two sets of blowholes is uniformly directed towards the rolling direction of the cable protection pipe 100. The blowhole located at the crest between the first uphill section 13 and the second downhill section 14 has its channel axis pointing diagonally downwards from the second downhill section 14, that is, the downhill direction in which the cable protection pipe 100 is about to roll in; the blowhole located at the crest between the second uphill section 15 and the third downhill section 16 has its channel axis pointing diagonally downwards from the third downhill section 16. The axis of each blowhole forms an acute angle with the tangent of the arc-shaped surface at its opening position, so that the ejected airflow is ejected tangentially along the surface of the pipe, giving it a clear directionality.

[0033] In this optional embodiment, the first blowhole 231 and the second blowhole 241 are uniformly tilted towards the rolling direction, so that the airflow generated by the pneumatic mechanism 2 is used specifically for auxiliary propulsion and rotation maintenance of the cable protection tube 100, rather than for cleaning and dust removal from the tube surface. When the cable protection tube 100 presses against the arc-shaped capsule 21, the high-pressure airflow is ejected along the rolling tangential direction of the cable protection tube 100. On the one hand, it applies a thrust component consistent with the rolling direction to the tube body, helping the cable protection tube 100 overcome the static friction resistance at the crest and accelerate it over the crest to enter the next slope. On the other hand, the tangentially ejected airflow generates an auxiliary torque on the tube surface, driving the cable protection tube 100 to continue rotating at the lowest speed point, so that the tube surface angle captured by the CCD camera 6 continues to change, avoiding the omission of a certain circumferential area due to the cessation of rotation. The airflow direction is consistent with the rolling direction of the cable protection tube 100, and will not generate reverse resistance to the movement, ensuring a pure and efficient propulsion effect. The inclined jet nozzles efficiently convert the compressed energy of the airbag into directional kinetic energy, clearly distinguishing it from the wide-angle ion curtain of the electrostatic dust removal mechanism 5 in terms of function and airflow pattern.

[0034] Optionally, the arc-shaped capsule 21 is installed at the crest between the first uphill section 13 and the second downhill section 14, and at the crest between the second uphill section 15 and the third downhill section 16. When the cable protection tube 100 rolls to the crest and presses the arc-shaped capsule 21, the cable protection tube 100 first compresses the first chamber 23, forcing the gas in the first chamber 23 to be ejected only from the first blow hole 231, so as to blow or assist the rotation of the surface of the cable protection tube 100. As the cable protection tube 100 continues to roll, it then compresses the second chamber 24, forcing the gas in the second chamber 24 to be ejected only from the second blow hole 241.

[0035] Specifically, two sets of arc-shaped capsules 21 are provided, which are fixedly installed at the crests between the first uphill section 13 and the second downhill section 14, and at the crests between the second uphill section 15 and the third downhill section 16, respectively, covering all crest positions in the rolling path of the cable protection pipe 100 on the wave plate 1. As the cable protection pipe 100 rolls from the first uphill section 13 towards the crest, it first contacts the arc-shaped capsule 21 area corresponding to the first chamber 23. The pipe's own weight compresses the first chamber 23, reducing its volume and compressing the internal gas. Because the rubber column 22 completely isolates the first chamber 23 from the second chamber 24, the gas cannot flow into the second chamber 24 and can only be ejected at high speed through the first blowhole 231, applying the first wave of tangential thrust to the pipe. As the cable protection pipe 100 continues to roll forward and tumble over the crest, the pipe gradually leaves the area of ​​the first chamber 23 and presses against the arc-shaped area corresponding to the second chamber 24. The second chamber 24 is compressed, and the internal gas is ejected at high speed from the second blowhole 241, applying the second wave of tangential thrust to the pipe. The two sets of arc-shaped capsules 21 work independently in this manner at both crests, resulting in two relay-style propulsions at each crest.

[0036] In this optional embodiment, the pneumatic mechanism 2 achieves relay-style assisted propulsion for the cable protection tube 100 throughout its journey over the wave crests by setting independent arc-shaped capsules 21 at each crest and using rubber pillars 22 to isolate the first chamber 23 and the second chamber 24. The exhaust pipe 55 of the electrostatic dust removal mechanism 5 is arranged on the first downhill section 12 and the second downhill section 14, and its surface has been cleaned before the cable protection tube 100 is photographed on the uphill slope; while the pneumatic mechanism 2 is installed at the wave crests, and its ejected airflow is dedicated to propelling the cable protection tube 100 over the two lowest speed points on the wavy path. The cable protection tube 100 rolls against the first chamber 23 to obtain initial thrust and rotational maintenance, and then rolls against the second chamber 24 to obtain continuous relay thrust and rotational maintenance. The two jets are sequential in time, covering the entire journey of the cable protection tube 100 from contact with the airbag to complete departure at the wave crest, ensuring that the cable protection tube 100 will not stop or stall due to lack of power at any position on the wave crest. The rubber column 22 prevents gas from flowing between chambers. Even if the cable protection tube 100 is rolled slowly, each chamber can still build up pressure independently and maintain effective jet thrust. This allows cable protection tubes 100 of different weights and diameters to obtain stable and reliable adaptive auxiliary drive, ensuring that the CCD camera 6 can acquire complete full-circle images on the first uphill section 13 and the second uphill section 15.

[0037] Furthermore, the machine vision-based cable protection pipe inspection device also includes an electrostatic dust removal mechanism 5. The electrostatic dust removal mechanism 5 includes an air pump 51, an electrostatic generator 52, an ion air duct 54, and an air outlet duct 55. The air outlet of the air pump 51 is connected to the air inlet of the electrostatic generator 52, the air outlet of the electrostatic generator 52 is connected to the air inlet of the ion air duct 54, and the air outlet of the ion air duct 54 is connected to the air outlet duct 55. The air outlet duct 55 is fixed on the first downhill section 12 and the second downhill section 14, and the air outlet of the air outlet duct 55 faces the surface of the corrugated plate 1 to blow ion air onto the surface of the cable protection pipe 100 that is being rolled over for electrostatic dust removal.

[0038] Specifically, the air inlet of the air pump 51 is connected to the ambient air, and its outlet is connected to the air inlet of the electrostatic generator 52 through an air supply pipe. The electrostatic generator 52 has a built-in high-voltage discharge electrode that ionizes the flowing air to generate a large number of positive and negative ions. Its outlet is connected to the air inlet of the ion air duct 54 through a pipe. The outlet of the ion air duct 54 is connected to the air outlet duct 55. The air outlet duct 55 is a flat strip-shaped air duct, which is horizontally fixed above the surface of the first downslope section 12 and the second downslope section 14 by a bracket. Its outlet is a narrow slit extending along the length of the duct, facing the surface of the corrugated plate 1. When the cable protection pipe 100 rolls down the first downslope section 12 or the second downslope section 14, the air outlet duct 55 evenly blows an airflow containing a high concentration of ions onto the surface of the cable protection pipe 100.

[0039] In this optional embodiment, the exhaust duct 55 is arranged on the first downhill section 12 and the second downhill section 14. This utilizes the characteristics of the cable protection pipe 100, such as its relatively fast rolling speed, continuous exposure of the pipe surface, and its not yet entering the imaging area of ​​the CCD camera 6, to complete surface cleaning before imaging. The air pump 51 provides a stable compressed air source. After the air is ionized by the electrostatic generator 52, the airflow carrying a large number of positive and negative ions is evenly sprayed out from the narrow slit of the exhaust duct 55 through the ion air duct 54, forming an ion air curtain covering the entire width of the cable protection pipe 100. When the ion air curtain blows onto the pipe surface, it neutralizes the static electricity accumulated on the cable protection pipe 100 due to rolling friction and the transport process, and blows away the micro-dust that has been attracted by static electricity from the pipe surface. This fundamentally eliminates image false defects caused by secondary dust adsorption during the detection process, effectively reducing the false judgment rate.

[0040] Furthermore, the machine vision-based cable protection tube detection device also includes a pushing mechanism 4, which includes a turntable 41, a lever 42, and a motor 43. The output shaft of the motor 43 is connected to the turntable 41 to drive the turntable 41 to rotate. One end of the lever 42 is fixed on the turntable 41. The feeding platform 11 is provided with a positioning protrusion 111. When the turntable 41 rotates, it drives the lever 42 to rotate. The lever 42 pushes the cable protection tube 100 located on the feeding platform 11, so that the cable protection tube 100 passes over the positioning protrusion 111 and enters the top of the first downhill section 12.

[0041] Specifically, the feeding mechanism 4 consists of a turntable 41, a lever 42, and a motor 43. The motor 43 is fixedly mounted on the frame on the side of the corrugated plate 1, and its output shaft is vertically upward and connected by a key to drive the turntable 41 to rotate uniformly in the horizontal plane. The lever 42 is a rigid rod, one end of which is vertically fixed to the edge of the turntable 41 and moves in a circular motion with the turntable 41. A transversely raised positioning protrusion 111 is provided on the upper surface of the feeding platform 11 in the area where it connects with the top of the first downhill section 12. The height of the positioning protrusion 111 is lower than the radius of the cable protection pipe 100, and its extension direction is parallel to the axis of the cable protection pipe 100. When the cable protection pipe 100 to be tested rolls along the feeding platform 11 to the positioning protrusion 111, it is blocked and stopped, and stabilized at the predetermined pushing starting position. When the turntable 41 rotates, the lever 42 approaches the cable protection tube 100 from the side and rear, pushes it forward along the surface of the feeding platform 11, pushes the cable protection tube 100 over the positioning protrusion 111, and then sends it into the top of the first downhill section 12 to begin gravity rolling.

[0042] In this optional embodiment, the positioning protrusion 111 ensures that each cable protection tube 100 has a consistent starting position and posture before being pushed. The lever 42 pushes the cable protection tubes 100 one by one away from the positioning protrusion 111 and into the first downhill section 12 with a fixed circular motion rhythm. The initial speed and position height of each push are consistent, which ensures that the starting conditions of each detection cycle are stable, thereby improving the repeatability of the detection rhythm and the consistency of imaging.

[0043] Optionally, the machine vision-based cable protection pipe inspection device also includes a baffle 3, which is fixed to both sides of the corrugated plate 1.

[0044] Specifically, the baffle 3 is a long strip-shaped protective plate extending longitudinally along the corrugated plate 1, and is fixedly installed on the left and right edges of the corrugated plate 1. Starting from the area of ​​the feeding platform 11, it continuously covers the first downhill section 12, the first uphill section 13, the second downhill section 14, the second uphill section 15, and the third downhill section 16, extending all the way to the discharge platform 17. The inner surface of the baffle 3 is perpendicular to the surface of the corrugated plate 1, and the distance between the inner surfaces of the two baffles 3 is slightly larger than the outer diameter of the cable protection pipe 100, forming an open guide channel. When the cable protection pipe 100 rolls in this channel, there is a small gap between its axial ends and the baffle 3, which prevents it from getting stuck and limits the lateral displacement of the cable protection pipe 100.

[0045] In this optional embodiment, baffles 3 are provided on both sides of the corrugated plate 1 to provide continuous lateral limiting protection for the entire gravity rolling path of the cable protection tube 100. The baffles 3 effectively prevent the cable protection tube 100 from laterally slipping or falling off the track due to unevenness of the plate surface, disturbance from the jet airflow, or self-deflection during rolling, ensuring that the axis of the cable protection tube 100 remains parallel to the field of view of the CCD camera 6, thus preventing the cable protection tube 100 from deviating from the imaging area or getting stuck on the plate edge, causing machine downtime. Simultaneously, the baffles 3 also serve a safety protection function, shielding the moving cable protection tube 100 and its internal mechanisms to prevent accidental contact by operators. They also facilitate the installation of a light-shielding cover on the outside of the baffles 3, providing a stable dark-field environment for visual inspection.

[0046] A method for using a machine vision-based cable protection pipe inspection device, based on the above-mentioned machine vision-based cable protection pipe inspection device, includes the following steps: S1: Push the cable protection pipe 100 onto the first downhill section 12. The cable protection pipe 100 rolls up the first uphill section 13 due to gravity, and the CCD camera 6 at the corresponding position takes a picture. S2: The cable protection pipe 100 continues to roll from the second downhill section 14 to the second uphill section 15 by gravity, and the CCD camera 6 at the corresponding position takes a picture. S3: Cable protection pipe 100 continues to roll out from the third downhill section 16 by gravity.

[0047] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A cable protection pipe inspection device based on machine vision, characterized in that, include: A wave plate (1) has a first downslope section (12), a first upslope section (13), a second downslope section (14), a second upslope section (15) and a third downslope section (16). The top height of the first downslope section (12) is greater than the top height of the first upslope section (13), and the top height of the first upslope section (13) is greater than the top height of the second upslope section (15), so that the cable protection pipe (100) can roll sequentially on the first downslope section (12), the first upslope section (13), the second downslope section (14), the second upslope section (15) and the third downslope section (16) by its own weight. A CCD camera (6) is installed inside the wave plate (1), with the lens of the CCD camera (6) facing the first uphill section (13) and the second uphill section (15).

2. The cable protection pipe inspection device based on machine vision according to claim 1, characterized in that, The wave plate (1) also includes a feeding platform (11) and a discharging platform (17). The feeding platform (11) is connected to the top of the first downhill section (12), and the discharging platform (17) is connected to the bottom of the third downhill section (16).

3. The cable protection pipe inspection device based on machine vision according to claim 2, characterized in that, The first downhill section (12), the first uphill section (13), the second downhill section (14), the second uphill section (15) and the third downhill section (16) are made of quartz glass.

4. The cable protection pipe inspection device based on machine vision according to claim 3, characterized in that, The machine vision-based cable protection pipe detection device also includes a pneumatic mechanism (2). The pneumatic mechanism (2) is located at the crest of the wave plate (1). The pneumatic mechanism (2) includes an arc-shaped capsule (21) and a rubber column (22). The arc-shaped capsule (21) has a hollow structure inside. The rubber column (22) is located in the middle of the inside of the arc-shaped capsule (21). The rubber column (22) divides the inner cavity of the arc-shaped capsule (21) into a first chamber (23) and a second chamber (24). The arc-shaped capsule (21) corresponding to the first chamber (23) has multiple first blow holes (231) on its arc-shaped surface. The arc-shaped capsule (21) corresponding to the second chamber (24) has multiple second blow holes (241) on its arc-shaped surface.

5. The cable protection pipe inspection device based on machine vision according to claim 4, characterized in that, Both the first blow hole (231) and the second blow hole (241) are inclined, and the inclination direction is toward the rolling direction of the cable protection tube (100).

6. The cable protection pipe inspection device based on machine vision according to claim 5, characterized in that, The arc-shaped capsule (21) is installed at the crest between the first uphill section (13) and the second downhill section (14), and at the crest between the second uphill section (15) and the third downhill section (16). When the cable protection tube (100) rolls to the crest and presses the arc-shaped capsule (21), the cable protection tube (100) first compresses the first chamber (23), forcing the gas in the first chamber (23) to be ejected only from the first blow hole (231) to blow or assist rotation on the surface of the cable protection tube (100). As the cable protection tube (100) continues to roll, it then compresses the second chamber (24), forcing the gas in the second chamber (24) to be ejected only from the second blow hole (241).

7. The cable protection pipe inspection device based on machine vision according to claim 6, characterized in that, The machine vision-based cable protection pipe detection device also includes an electrostatic dust removal mechanism (5). The electrostatic dust removal mechanism (5) includes an air pump (51), an electrostatic generator (52), an ion air duct (54), and an air outlet duct (55). The air outlet of the air pump (51) is connected to the air inlet of the electrostatic generator (52). The air outlet of the electrostatic generator (52) is connected to the air inlet of the ion air duct (54). The air outlet of the ion air duct (54) is connected to the air outlet duct (55). The air outlet duct (55) is fixed on the first downhill section (12) and the second downhill section (14), and the air outlet of the air outlet duct (55) faces the surface of the corrugated plate (1) to blow ion air onto the surface of the cable protection pipe (100) that it rolls over for electrostatic dust removal.

8. The cable protection pipe inspection device based on machine vision according to claim 7, characterized in that, The machine vision-based cable protection tube detection device also includes a pushing mechanism (4), which includes a turntable (41), a lever (42), and a motor (43). The output shaft of the motor (43) is connected to the turntable (41) to drive the turntable (41) to rotate. One end of the lever (42) is fixed on the turntable (41). The feeding platform (11) is provided with a positioning protrusion (111). When the turntable (41) rotates, it drives the lever (42) to rotate. The lever (42) pushes the cable protection tube (100) located on the feeding platform (11) so that the cable protection tube (100) passes over the positioning protrusion (111) and enters the top of the first downhill section (12).

9. The cable protection pipe inspection device based on machine vision according to claim 8, characterized in that, The machine vision-based cable protection pipe detection device also includes a baffle (3), which is fixed to both sides of the corrugated plate (1).

10. A method of using a machine vision-based cable protection pipe inspection device, based on the machine vision-based cable protection pipe inspection device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Push the cable protection pipe (100) onto the first downhill section (12), and the cable protection pipe (100) rolls up the first uphill section (13) due to gravity. The CCD camera (6) at the corresponding position takes a picture. S2: The cable protection pipe (100) continues to roll from the second downhill section (14) to the second uphill section (15) by gravity, and the CCD camera (6) at the corresponding position takes a picture; S3: The cable protection pipe (100) continues to roll out from the third downhill section (16) by gravity.

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