CN219776900U - Tubular product color mark quality detection equipment based on machine vision - Google Patents

Abstract

The utility model aims at solving the problem that quality of a pipe color code line detected by human eyes is inaccurate, and provides pipe color code line quality detection equipment based on machine vision. The distribution and the form of the color mark lines of the pipe are detected by utilizing machine vision, so that various indexes of the color mark line with a defect can be accurately detected, and the quality variability can be conveniently compared with the definite quality variability to obtain the definite evaluation.

Description

Tubular product color mark quality detection equipment based on machine vision

Technical Field

The utility model relates to the field of appearance detection, in particular to a machine vision-based pipe color mark quality detection device.

Background

At present, plastic pipes are increasingly applied to production and living. In order to meet the classification and convenient use of the pipes with different functions, color marks are often drawn on the outer surface of the pipe, and whether the positions and the forms of the color marks on the pipe are consistent with design standards reflects the quality of the pipe and the quality of a processing technology, so that the color mark lines are in shape and distribution, but are necessary for detecting the quality of the color mark lines of the pipe. However, the quality detection of the color code line is mainly judged by observing the cross section of the color code line by human eyes at present, as shown in fig. 6, the color code line has small sectional area and irregular shape, and the color code line is difficult to accurately judge by human eye observation and cannot be effectively compared with a definite detection index. In order to improve the detection efficiency and quality of the pipe marking, a novel detection device is needed.

Disclosure of Invention

The utility model aims at solving the problem that quality of a color code line of a pipe detected by human eyes is inaccurate, and provides equipment for detecting the quality of the color code line of the pipe based on machine vision.

The technical aim of the utility model is realized by the following technical scheme:

the utility model provides a tubular product color mark quality detection equipment based on machine vision, includes the background device that is used for placing the tubular product sample that awaits measuring, is used for shooting the shooting device and the image processing analytical equipment of tubular product sample image, shooting device includes the camera, the shooting direction of camera is just to the background device, the camera is connected with image processing device electricity.

Preferably, the background device comprises a base and background color plates, wherein a plurality of background color plates are arranged, the colors of the background color plates are different, a background plate groove for shooting the background color plates is formed in the top of the base, the background color plates in the background plate groove are horizontal, and a standby plate groove for placing the rest standby background color plates is formed in the side wall of the base.

Preferably, a plurality of spare plate grooves are formed, and each spare background color plate is independently placed in one spare plate groove.

Preferably, the shooting device further comprises a vertical frame and a hanging frame fixedly connected to the vertical frame in a sliding mode along the vertical direction, and the camera is fixedly arranged on the hanging frame.

Preferably, the shooting device further comprises an annular illuminating lamp, the illuminating lamp is located between the background device and the camera, and the illuminating lamp is coaxial with the camera lens.

Preferably, the illuminating lamp is fixedly connected to the vertical frame in a sliding manner.

Preferably, the pipe sampling device further comprises a pipe sampling device for intercepting a pipe sample to be tested, the pipe sampling device comprises a pipe positioning component and a cutting component, the cutting component comprises two blades and a driving blade rotating driver, the blades are arranged side by side in a rotating mode, the pipe positioning component comprises a sliding seat which is fixedly arranged in a sliding mode along the direction perpendicular to the rotating axis of the blades and a rod-shaped in-pipe supporting piece which is detachably arranged on the sliding seat in a rotating mode, the geometric axis and the rotating axis of the in-pipe supporting piece coincide and are parallel to the rotating axis of the blades, two annular abdicating grooves coaxial with the in-pipe supporting piece are formed in parallel on the surface of the in-pipe supporting piece, the width of the abdicating grooves is larger than the thickness of the blades, the distance between the abdicating grooves is equal to the distance between the two blades, and the two blades are opposite to the two abdicating grooves respectively.

Preferably, the support piece in the pipe comprises support parts, connecting parts and connecting rod parts, wherein the support parts are uniformly distributed in circumference by taking the first axis as the center, the connecting parts are cylindrical structures with the first axis coincident, the connecting parts are provided with two, each support part is positioned between the two connecting parts, the support parts and the connecting parts are connected through the connecting rod parts, two ends of each connecting rod part are hinged with the adjacent support parts and the connecting parts respectively, the hinge axes are perpendicular to the first axis, and the hinge axes of all parts on the connecting rod parts connected with the same support part are mutually parallel and perpendicular to the perpendicular connection line of the corresponding support parts and the first axis.

Preferably, the support piece in the pipe is connected with the sliding seat through the clamping assembly, the clamping assembly comprises a clamping smooth rod fixedly connected to the sliding seat, a clamping screw rod rotationally connected to the sliding seat and two clamping seats which are oppositely arranged, the clamping smooth rod and the clamping screw rod are parallel to the support piece in the pipe, the clamping seat is in sliding connection with the clamping smooth rod and in threaded connection with the clamping screw rod, the inserting blocks are respectively arranged on one side, opposite to each other, of the two clamping blocks, the inserting grooves matched with the inserting blocks are respectively formed in two ends of the support piece in the pipe, and the support piece in the pipe is located between the two support seats and the inserting blocks are located in the adjacent inserting grooves.

Preferably, the feed screw rod is rotatably arranged in parallel with the feed screw rod by sliding the feed screw rod supporting sliding seat, and is in threaded connection with the sliding seat.

The utility model has the following beneficial effects:

the distribution and the form of the color mark lines of the pipe are detected by utilizing machine vision, so that various indexes of the color mark line with a defect can be accurately detected, and the color mark line is conveniently compared with the definite quality variability to obtain the definite evaluation. Through setting up the background color board of multiple different colours, make picture tubular product body, color code line region and surrounding environment in the image that the camera gathered can be obvious distinguish, help improving image quality, reduce the degree of difficulty of image analysis, and then improve the accuracy of detection. The influence of natural light unevenness on the image is reduced through the annular illuminating lamp, and the difficulty of image analysis and processing is reduced. The cutting device with double blades is arranged, so that parallel double sections can be obtained by one-time cutting, and requirements of shooting picture quality and shooting angle are met simultaneously, and the cutting device is convenient to use. Set up tubular product sampling device, reduce tubular product deformation that causes when tubular product sample cuts through intraductal strutting arrangement and clamping device to reduce because cut the color mark line quality detection structure that causes and be low, can also adapt to not unidimensional tubular product and intercept simultaneously.

Drawings

FIG. 1 is a schematic structural view of a machine vision-based pipe color line quality inspection apparatus of the present utility model;

FIG. 2 is a schematic diagram of a cross-section of a background device;

FIG. 3 is a schematic top view of a tubing sampling device;

FIG. 4 is a schematic view of the structure of the in-pipe support device;

FIG. 5 is a flow chart of an image analysis processing method;

FIG. 6 is a schematic diagram of the color mark and index meaning of the cross section of the pipe.

The reference numerals are used to describe the components,

100. a background device; 110. a base; 111. a background plate groove; 112. a plate preparation groove; 113. a plate taking groove; 120. a background color plate; 200. a photographing device; 210. a camera; 220. a vertical frame; 230. a hanging bracket; 240. a lighting lamp; 300. a pipe sampling device; 311. an in-tube support; 3111. a support part; 3112. a link portion; 3113. a connection part; 3114. a relief groove; 3115. a slot; 3116. an axis I; 3121. a clamping seat; 3122. a clamping block; 3123. clamping a lead screw; 3124. clamping a feed rod; 3125. inserting blocks; 313. a sliding seat; 314. a feed screw; 315. feeding a feed lever; 320. a cutting assembly; 321. a blade; 322. a driver; 323. a rotating shaft; 324. a bearing support; 330. a knob; 400. pipe samples.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals.

The machine vision-based pipe color line quality detection equipment comprises a background device 100 for placing a pipe sample to be detected, a shooting device 200 for shooting an image of the pipe sample and an image processing analysis device (not shown in the figure), as shown in fig. 1.

As shown in connection with fig. 1 and 2, the background device 100 includes a base 110 and a background color plate 120. The base 110 has a rectangular frame shape and supports the background color plate 120 and the photographing device 200. The background color plates 120 are provided with a plurality of pieces, the colors of the background color plates 120 are different, when in use, the background color plates 120 with larger color difference with the color of the pipe body and the color mark line are selected from the plurality of pieces of background color plates 120, so that the pipe body, the color mark line area and the surrounding environment in an image can be obviously distinguished, the image quality is improved, the difficulty of image analysis is reduced, and the detection accuracy is further improved. The top of the base 110 is provided with a background plate groove 111 for shooting a background color plate 120 required, and the side wall of the base 110 is provided with a standby plate groove 112 for placing the rest standby background color plates 120. The background color plate 120 in the background plate groove 111 is in a horizontal state, the flat section of the pipe sample is tightly attached to the upper surface of the background color plate 120, then the pipe sample is shot from the upper side of the pipe sample, when the pipe sample is short, the pipe sample can be kept stable under the condition of no external force, and inaccurate roundness of the pipe when the pipe is shot due to downward spreading under the action of gravity can be avoided. The number of the spare color plates 120 is not less than the number of the spare color plates 120, and each spare color plate 120 is individually placed in one spare color plate groove 112, so that scratches formed by rubbing between different color plates 120 during replacement and picking of the spare color plates 120 can be prevented, and redundant image information in a photographed image can be reduced. In order to facilitate the taking of the background color plate 120, a plate taking groove 113 may be formed on a side wall of the base 110, the plate taking groove 113 penetrates through the background plate groove 111 and the plate preparing groove 112, and when the background color plate 120 is located in the background plate groove 111 or the plate preparing groove 112, a part of the background color plate 120 is exposed in the plate taking groove 113. It should be noted that, in the initial stage of shooting, the camera 210 is calibrated, typically, a Zhang Zhengyou calibration method is adopted, and a black-and-white calibration background plate used in the method may also be placed in the standby plate slot 112.

As shown in fig. 1, the photographing device 200 includes a camera 210 and a stand supporting the camera 210 directly above the background device 100. The stand includes a rod-shaped stand 220 vertically fixed to a sidewall of the base 110 and a hanger 230 slidably and fixedly coupled to the stand 220. One end of the hanger 230 is provided with a sleeve structure matched with the shape of the stand 220, the sleeve structure is sleeved on the stand 220, a threaded through hole is formed in the sleeve, a positioning bolt is connected in the threaded through hole in a threaded manner, when the positioning bolt is screwed in and tightly props against the stand 220, the hanger 230 and the stand 220 are relatively fixed, and when the positioning bolt is screwed out and does not contact with the stand 220, the hanger 230 can slide up and down along the stand 220, so that a proper shooting distance can be conveniently selected according to the diameter of a pipe sample. The camera 210 is a CDD camera, and is fixed to the cradle 230 such that the lens of the camera 210 faces downward against the upper surface of the background device 100. In order to avoid situations that the same color area in the image presents larger color difference, shadows appear at the edges of the pipe samples and the like, which are caused by insufficient illumination, uneven light and the like, and increase the image analysis difficulty, an illuminating lamp 240 can be arranged between the background device 100 and the camera 210, the illuminating lamp 240 is preferably annular, and the illuminating lamp 240 is coaxial with the lens of the camera 210, so that uniform light filling is facilitated. The illuminating lamp 240 is preferably slidably and fixedly connected to the stand 220, so that a proper light supplementing position can be conveniently selected according to the diameter of the pipe sample, and in this embodiment, a similar slidably fixing structure is adopted between the illuminating lamp 240 and the hanger 230.

As shown in fig. 5 and 6, the image processing and analyzing device is directly connected to the camera to obtain the image to be processed and analyzed, and in this embodiment, the image processing device is a computer. The image analysis processing device is used for carrying out analysis processing on the images to finally obtain the information such as the number of color mark lines, the area of the color mark lines, the width of the color mark lines, the depth of the color mark lines, the distribution deviation of the color mark lines and the like on the cross section of the pipe, and comparing the information with standard color mark line indexes to detect whether the pipe is qualified or not. The method of image processing and analysis can have various options, and a method based on a Python programming language is provided herein, which is specifically as follows:

and 1, calibrating the camera by using a Zhang Zhengyou calibration method.

And 2, obtaining clear RGB images of the section of the pipe.

And 3, setting the initial image acquired by the camera as an image 1, copying the image 1 to obtain an image 2, and storing the image 2.

Step 4, processing the image 1 to obtain the number and outline information of the color marks:

performing color model conversion on the image 1, converting an RGB model into an HSV color model, and dividing an upper threshold and a lower threshold by using cv2.i nRange to obtain a color code line area A;

binarizing the color code line area A by using a cv2.thresho l d function to obtain a color code line area B;

performing opening and closing operation on the color code line area B, eliminating noise points, and filling a closed area to obtain a color code line area C;

performing contour detection on the color mark line region C by using a cv2.fi ndContours function to obtain the number and contour information of the color mark lines;

step 5, processing the image 2 to obtain the center coordinates of the pipe:

converting image 2 into a gray scale map using a cv2.cvtcol or function;

performing circle detection on the gray level diagram by using a cv2.HoughC i rc l es function to obtain a radius R1 and a circle center O1 of the inner wall of the pipe and a radius R2 and a circle center O2 of the outer wall of the pipe;

comparing the radii R1 and R2 of the inner wall and the outer wall of the pipe with theoretical values R11 and R21 of the radii of the inner wall and the outer wall of the pipe, when the I R1-R11I is not less than the I R2-R21I, selecting a circle center O2 as a predicted circle center O, otherwise selecting O1 as the predicted circle center O;

step 6, obtaining quality indexes of the color mark line according to the number and the outline information of the color mark line areas obtained in the step 4 and the circle center coordinates of the pipe obtained in the step 5:

acquiring the number of color marks, namely the number of color mark line areas;

obtaining the area of each color mark line area according to the number of pixels in the outline of the color mark line area;

according to the outline of the color mark line region, utilizing an image moment function cv2.motion to obtain the mass centers of the color mark line regions, obtaining the connecting lines of the circle centers and the mass centers, selecting a line as a reference, obtaining the included angles between the connecting lines and the reference, and obtaining the distribution information of the color mark lines;

according to the outline of the color mark line region and the circle center coordinates of the pipe, obtaining the circumferential angle value corresponding to each color mark line region, thereby obtaining the arc length corresponding to each color mark line region, namely the width of each color mark line;

extending the connecting line of the circle center and each centroid to the outer contour of the color code line area, wherein the length of the straight line in the color code line area is the depth of each color code line;

and 7, comparing the quality index of the color mark line with the index range of the standard color mark line, and evaluating.

As shown in fig. 1 and 3, in order to ensure that the section of the pipe sample is clear and flat, a pipe sampling device 300 may be provided to intercept the pipe sample. The tubing sampling apparatus 300 includes a tubing positioning assembly and a cutting assembly 320. The cutting assembly 320 includes two blades 321 disposed in parallel and a driver 322 for driving the blades 321 to rotate, wherein the two blades 321 are fixedly disposed on a same rotating shaft 323, and the rotating shaft 323 is rotatably connected to the base 110 through a bearing support 324.

The pipe positioning assembly comprises an in-pipe support piece 311 which supports from the inside of the pipe, a feeding assembly which drives the in-pipe support piece 311 to be close to or far away from the blade 321, and a clamping assembly which rotatably and detachably sets the in-pipe support piece 311 on the feeding assembly. By using the in-pipe support 311 to support the pipe from inside, deformation of the pipe during cutting can be reduced, so that the cut pipe sample is more similar to the real situation of the pipe in a natural state.

The whole in-pipe support piece 311 is the pole shape, the geometric axis and the axis of rotation coincidence of in-pipe support piece 311 and with the axis of rotation of blade 321, it is first 3116 to keep in charge the axis of in-pipe support piece 311, the thickest position of in-pipe support piece 311 should be with taking the internal diameter looks adaptation of intercepting tubular product, can stably support tubular product, two annular groove 3114 of stepping down have been seted up on the thickest position global side by side of in-pipe support piece 311, the axis of groove 3114 coincides with first 3116 of stepping down, the interval of two grooves 3114 and the interval of two blades 321 are equal, two blades 321 are relative with two grooves 3114 of stepping down respectively, the width of groove 3114 is greater than the thickness of blade 321, when tubular product is cut by blade 321, blade 321 can cut into groove 3114 of stepping down, it is cut thoroughly to guarantee to tubular product.

Referring to fig. 4, the in-pipe support 311 may be a section of cylinder with the same inner diameter as the pipe to be measured, and the in-pipe support 311 with different diameters may be directly replaced by processing pipes with different inner diameters, or the in-pipe support 311 may be configured as a structure with adjustable thickness, and in this embodiment, the structure of the in-pipe support 311 with adjustable thickness is provided, which is specifically as follows: which includes a support portion 3111, a connection portion 3113 and a connection portion 3112. Wherein the connection portion 3113 is cylindrical and provided with two. Two of the connection portions 3113 have a cylindrical structure with an axis coincident with the axis one 3116. The support portions 3111 are provided with two or more circumferentially distributed uniformly centering on the axis 3116, and in this embodiment, three support portions 3111 are provided, and each support portion 3111 is located between two connection portions 3113. The support portion 3111 and the connection portion 3113 are connected to each other by a link portion 3112, both ends of the link portion 3112 are hinged to the adjacent support portion 3111 and connection portion 3113, respectively, and the hinge axis is perpendicular to the axis one 3116, and the hinge axis axes of the respective portions of the link portion 3112 connected to the same support portion 3111 are parallel to each other and perpendicular to the perpendicular connection line of the corresponding support portion 3111 and the axis one 3116. Thus, the two connecting rod portions 3112 to which the support portion 3111 is connected form a bendable arm, and when the two connecting portions 3113 are close to each other under the clamping of the clamping assembly, the arm bends, so that the support portion 3111 is far away from the axis one 3116, and the support piece 311 in the pipe is thickened integrally until abutting against the inner wall of the pipe sleeved on the support piece, so that the internal support of the pipe is realized.

As shown in fig. 1 and 3, in order to avoid excessive abduction or insufficient supporting force of the supporting portion 3111, the clamping assembly may have the following structure: the clamping assembly comprises a clamping light bar 3124 fixedly connected to the sliding seat 313, a clamping screw 3123 rotatably connected to the sliding seat 313, and two clamping seats 3121 oppositely arranged. The clamping feed screw 3124 and the clamping feed screw 3123 are parallel to the in-pipe support piece 311, the clamping seat 3121 is in sliding connection with the clamping feed screw 3124 and in threaded connection with the clamping feed screw 3123, the clamping feed screw 3123 is a bidirectional feed screw, when the clamping feed screw 3123 rotates, the two clamping seats 3121 are close to or far away from each other at the same speed, and the two clamping seats 3121 are kept relatively fixed when no external force acts by utilizing the self-locking characteristic of the feed screw. The rotation axis of the clamping block 3122 is parallel to the rotation axis of the clamping screw 3123, the insertion blocks 3125 are respectively arranged at one side of the two clamping blocks 3122 opposite to each other, the two ends of the in-tube support 311 are respectively provided with the slots 3115 adapted to the insertion blocks 3125, the in-tube support 311 is positioned between the two support seats, and the insertion blocks 3125 are positioned in the adjacent slots 3115, so that the in-tube support 311 and the clamping block 3122 can be ensured not to be separated even if the clamping force is relatively small. It should be noted that the pipe needs to be rotated by the blade 321 by rotating the support 311 in the pipe via the insert 3125, and thus the insert 3125 cannot be in a shape of a cylinder, a cone, a ball, etc. which can freely rotate in a groove adapted thereto, and is configured in a hexagonal prism shape in this embodiment.

The feeding assembly comprises a sliding seat 313, a feeding light bar 315 and a feeding screw 314, wherein the feeding light bar 315 is fixedly arranged on the base 110, the feeding screw 314 is rotationally connected on the base 110, and the feeding light bar 315 and the feeding screw 314 are arranged in parallel and are perpendicular to the rotation axis of the blade 321. The sliding seat 313 is slidably connected with the feed screw 315 and is in threaded connection with the feed screw 314, and the feed screw 314 is rotated to enable the sliding to drive the clamping assembly and the blade 321 of the upper pipe inner support 311 thereof, so that the pipe sleeved on the pipe inner support 311 is cut.

Since the feeding amount of the pipe, the adjustment amount of the clamping distance of the clamping assembly, and the rotation amount of the support member 311 in the pipe are small, and the real-time state of the cut pipe needs to be observed, it is preferable to adjust by using a manual control method, and for this purpose, the knob 330 may be provided on the feed screw 314, the clamping screw 3123, and the clamping block 3122 to facilitate manual operation.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Claims (10)

1. Machine vision-based pipe color mark quality detection equipment is characterized in that: the device comprises a background device (100) for placing a pipe sample to be measured, a shooting device (200) for shooting an image of the pipe sample and an image processing analysis device, wherein the shooting device (200) comprises a camera (210), the shooting direction of the camera (210) is opposite to the background device (100), and the camera (210) is electrically connected with the image processing device.

2. The machine vision-based pipe color line quality detection apparatus of claim 1, wherein: the background device (100) comprises a base (110) and background color plates (120), wherein the background color plates (120) are provided with a plurality of pieces, the colors of the background color plates (120) are different, a background plate groove (111) for shooting the background color plates (120) is formed in the top of the base (110), the background color plates (120) in the background plate groove (111) are horizontal, and a spare plate groove (112) for placing the rest of standby background color plates (120) is formed in the side wall of the base (110).

3. The machine vision-based pipe color line quality detection apparatus of claim 2, wherein: the spare plate grooves (112) are provided with a plurality of spare background color plates (120), and each spare background color plate is independently placed in one spare plate groove (112).

4. The machine vision-based pipe color line quality detection apparatus of claim 1, wherein: the shooting device (200) further comprises a stand (220) and a hanging bracket (230) fixedly connected to the stand (220) in a sliding manner along the vertical direction, and the camera (210) is fixedly arranged on the hanging bracket (230).

5. The machine vision based pipe color line quality inspection apparatus of claim 4, wherein: the photographing device (200) further comprises an annular illuminating lamp (240), the illuminating lamp (240) is located between the background device (100) and the camera (210), and the illuminating lamp (240) is coaxial with a lens of the camera (210).

6. The machine vision based pipe color line quality inspection apparatus of claim 5, wherein: the illuminating lamp (240) is fixedly connected to the stand (220) in a sliding manner.

7. The machine vision-based pipe color line quality detection apparatus of claim 1, wherein: still including tubular product sampling device (300) that are used for intercepting tubular product sample that awaits measuring, tubular product sampling device (300) include tubular product locating component and cutting component (320), cutting component (320) are including two blade (321) and the pivoted driver (322) of driving blade (321) that rotate the setting side by side, tubular product locating component includes sliding seat (313) and the tubular support piece (311) of the shaft-like that can dismantle the rotation setting on sliding seat (313) that slide along perpendicular to blade (321) axis direction of rotation set up, the geometric axis and the axis of rotation coincidence of tubular support piece (311) are parallel with the axis of rotation of blade (321), two annular grooves of stepping down (3114) coaxial with it have been seted up side by side on the surface of tubular support piece (311), and the width of stepping down groove (3114) is greater than the thickness of blade (321), and the interval of two grooves of stepping down (3114) and two blade (321) equals, and two blades (321) are relative with two grooves of stepping down (3114) respectively.

8. The machine vision based pipe color line quality inspection apparatus of claim 7, wherein: the support (311) in the pipe comprises a support part (3111), a connecting part (3113) and a connecting rod part (3112), wherein the support part (3111) is provided with more than two cylindrical structures which are uniformly distributed by taking an axis one (3116) as a center, the connecting part (3113) is of a cylindrical structure with an axis coincident with the axis one (3116), the connecting parts (3113) are provided with two, each support part (3111) is located between the two connecting parts (3113), the support parts (3111) are connected with the connecting parts (3113) through the connecting rod parts (3112), two ends of the connecting rod parts (3112) are hinged with the adjacent support parts (3111) and the connecting parts (3113) respectively, the hinge axes are perpendicular to the axis one (3116), and the hinge axes on the connecting rod parts (3112) connected with the same support part (3111) are mutually parallel and perpendicular to the perpendicular connection line of the corresponding support parts (3111) and the axis one (3116).

9. The machine vision-based pipe color line quality detection apparatus of claim 2, wherein: the in-pipe support piece (311) is connected with the sliding seat (313) through the clamping assembly, the clamping assembly comprises a clamping light bar (3124) fixedly connected to the sliding seat (313), a clamping screw (3123) rotatably connected to the sliding seat (313) and two clamping seats (3121) which are oppositely arranged, the clamping light bar (3124) and the clamping screw (3123) are parallel to the in-pipe support piece (311), the clamping seats (3121) are in sliding connection with the clamping light bar (3124) and are in threaded connection with the clamping screw (3123), the opposite sides of the two clamping blocks (3122) are respectively provided with an inserting block (3125), two ends of the in-pipe support piece (311) are respectively provided with a slot (3115) which is matched with the inserting block (3125), and the in-pipe support piece (311) is positioned between the two support seats and the inserting block (3125) is positioned in the adjacent slots (3115).

10. The machine vision-based pipe color line quality detection apparatus of claim 2, wherein: the sliding seat (313) is supported by the feeding light bar (315) to slide, a feeding screw rod (314) parallel to the feeding light bar (315) is rotatably arranged, and the feeding screw rod (314) is in threaded connection with the sliding seat (313).