PVC sleeve defect detection device based on visual identification

Abstract

The invention relates to the technical field of PVC sleeve detection, and discloses a visual identification-based PVC sleeve defect detection device which comprises a bottom plate, a rotating mechanism for assisting a PVC sleeve in rotary detection is arranged at the position, close to the front face, of the top of the bottom plate, and a disc is arranged at the top of the rotating mechanism. A moving mechanism for achieving position adjustment is arranged at the position, close to the back face, of the top of the bottom plate, an adjusting mechanism is arranged at the top of the moving mechanism, and a CCD camera is arranged at the end of the adjusting mechanism. According to the device, the CCD camera can penetrate into the inner cavity of the PVC sleeve for photographing, so that the defect condition of the inner cavity of the PVC sleeve can be clearly photographed by the CCD camera, the detection of the inner cavity of the PVC sleeve by the CCD camera is clearer and more effective, the defect identification of the outside of the PVC sleeve can be realized through the cooperation of the moving mechanism and the adjusting mechanism, and the detection efficiency is improved. And the PVC sleeve can be rotated through the rotating mechanism to realize 360-degree external defect identification.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PVC sleeve detection, in particular to a PVC sleeve defect detection device based on visual recognition. BACKGROUND

[0002] PVC sleeves can be divided into soft PVC sleeves and hard PVC sleeves, PVC sleeves have strong corrosion resistance, are easy to bond, have low prices, and have hard textures, PVC sleeves can be used for applications such as drainage, wastewater, chemicals, heated liquids, cooling liquids, food, ultra-pure liquids, mud, gas, compressed air, and vacuum systems, and during the production process of PVC sleeves, unqualified products often occur, and a PVC sleeve defect detection device uses computer vision recognition technology to compare the appearance and size of the PVC sleeve to achieve the effect of detecting unqualified products.

[0003] Through retrieval, a patent with publication number CN221405358U discloses a silica gel glass sleeve defect visual online detection device, which first fixes a ring-shaped ring near the top edge between the inner walls of the fixed sleeve, then fixes multiple CCD cameras on the inner wall of the ring-shaped ring, and simultaneously fixes rubber scraping rings at the middle and bottom positions between the inner walls of the fixed sleeve, so that the cleaned silica gel glass sleeve can be placed inside the fixed sleeve, and when pulled outward, the water flow on the outer surface of the silica gel glass sleeve is scraped off by the lowermost rubber scraping ring, and the water vapor generated during drying is prevented from flowing to the CCD camera by the rubber scraping ring at the middle position, although this patent improves the clarity of the CCD camera imaging and improves the detection effect, however, the structure of this patent still has the following problems:

[0004] 1. The CCD cameras are fixed in the ring-shaped groove in the inner cavity of the fixed sleeve for visual recognition of the sleeve, and the fixed position of the CCD cameras in the vertical direction causes the upper half of the sleeve cavity to be clearer during visual recognition of the sleeve cavity, and the lower half of the sleeve cavity is not clear enough, thereby causing incomplete detection;

[0005] 2. The fixed position of the CCD cameras causes the upper half of the sleeve to be clearer and the lower half to be more blurred during detection of the sleeve, thereby causing incomplete detection of different types of sleeves by the CCD cameras. SUMMARY

[0006] TECHNICAL PROBLEM SOLVED

[0007] To solve the problem of incomplete detection of the internal and external defects of the PVC sleeve by the CCD camera due to its fixed position during visual recognition of the PVC sleeve, the present application provides a PVC sleeve defect detection device based on visual recognition.

[0008] Technical scheme

[0009] To achieve the above object, the present application provides the following technical scheme:

[0010] A PVC sleeve defect detection device based on visual recognition, comprising a base plate, a rotating mechanism for assisting the rotation detection of the PVC sleeve is arranged on the top of the base plate near the front surface, a disc is arranged on the top of the rotating mechanism, a moving mechanism for realizing position adjustment is arranged on the top of the base plate near the back surface, and a CCD camera is arranged on the top of the moving mechanism through an adjusting mechanism;

[0011] The adjusting mechanism comprises a sector plate, a movable rod is rotatably connected to the front surface of the sector plate, a guide rod is fixedly connected to the end of the movable rod away from the rotation center, a guide groove matched with the guide rod is formed in the sector plate, the guide rod penetrates through the guide groove and is slidably connected with the guide groove, a limiting sleeve is sleeved with the end of the guide rod near the back surface of the sector plate, a first air cylinder is fixedly connected to the back surface of the sector plate, the telescopic shaft of the first air cylinder is matched with the limiting sleeve to move horizontally, a fixed plate is fixedly connected to the front surface of the movable rod, a lifting rod is slidably connected to the inner cavity of the fixed plate, the CCD camera is fixedly connected to the bottom end of the lifting rod, a second air cylinder is fixedly installed on the top of the fixed plate, and the telescopic shaft of the second air cylinder is matched with the lifting rod to move up and down.

[0012] As a further scheme of the present application, slide sleeves are fixedly connected to the two sides of the back surface of the sector plate near the first air cylinder, positioning rods are slidably connected in the inner cavities of the slide sleeves, and the positioning rods are fixedly connected to one side of the limiting sleeve.

[0013] As a further scheme of the present application, a lifting groove is formed in the inner cavity of the fixed plate, the lifting rod is slidably connected in the inner part of the lifting groove, positioning grooves are formed in the two sides of the lifting groove, positioning blocks are slidably connected in the positioning grooves, and the positioning blocks are fixedly connected to the outer wall of the lifting rod.

[0014] As a further scheme of the present application, the moving mechanism comprises a fixed rod, the fixed rod is fixedly connected to the top of the base plate, a sliding groove is formed in the fixed top, a sliding table is slidably connected in the inner cavity of the sliding groove, and the sector plate is fixedly connected to the top of the sliding table.

[0015] As a further scheme of the present application, a lead screw is threadedly connected to the bottom of the sliding table, the lead screw penetrates through one side of the fixed plate and is rotatably connected with the fixed plate, a first motor is fixedly connected to the end of the lead screw, and the first motor is fixedly connected to the top of the base plate.

[0016] As a further further scheme of the present application, the rotating mechanism comprises a right angle rod fixedly connected to the top of the bottom plate, a rotating shaft rotatably connected to one end of the top of the right angle rod, and the rotating shaft is fixedly connected to the bottom of the shaft of the disc at one end and rotatably connected to the top of the bottom plate at the other end.

[0017] As a further further scheme of the present application, the rotating shaft is fixedly connected with a first gear, the top of the bottom plate is fixedly connected with a second motor, the output end of the second motor is fixedly connected with a second gear, and the first gear is engaged with the second gear.

[0018] As a further further scheme of the present application, the top of the disc is fixedly connected with a clamping sleeve near the two sides of the shaft of the disc, the clamping sleeve is slidably connected with a clamping rod in the inner cavity of the clamping sleeve, a spring is fixedly connected in the inner cavity of the clamping sleeve, one end of the spring is fixedly connected to the end of the clamping rod, and the opposite side of the clamping rod is fixedly connected with a triangular block.

[0019] Advantages

[0020] Compared with the prior art, the present application provides a PVC sleeve defect detection device based on visual recognition, which has the following advantages:

[0021] 1、The present application can clearly capture the defects in the inner cavity of the PVC sleeve by placing the PVC sleeve on the top of the disc, using the second cylinder to push the lifting rod to slide downward in the inner cavity of the fixed plate, and using the CCD camera to move downward and deep into the inner cavity of the PVC sleeve to take pictures, so that the CCD camera can clearly capture the defects in the inner cavity of the PVC sleeve, and the detection of the inner cavity of the PVC sleeve by the CCD camera is more clear and effective, and the problem of incomplete detection of the defects of the PVC sleeve due to the fixed position of the CCD camera is solved.

[0022] 2、The present application can rotate the CCD camera by using the first cylinder to push the limiting sleeve to slide horizontally, the limiting sleeve to move horizontally and drive the guide rod to slide in the guide groove, and the movable rod to rotate, so that the CCD camera can recognize the external conditions of the PVC sleeve by adjusting the angle of the CCD camera when detecting the defects on the outside of the PVC sleeve, and the problem of incomplete detection of the defects on the outside of the PVC sleeve due to the fixed position of the CCD camera is solved.

[0023] 3. The present invention uses a fan-shaped plate to perform lateral adjustment through a moving mechanism. When detecting PVC sleeves of different models and sizes, the angle of the movable rod is rotated to achieve angle fine-tuning. The movement of the fan-shaped plate through the moving mechanism can realize a large horizontal movement of the CCD camera, thereby achieving a large-angle adjustment of the CCD camera, and solving the problem that the CCD camera is not comprehensive enough in detecting external defects of PVC sleeves of different models and sizes due to the fixed position of the CCD camera.

[0024] 4. The present invention drives the disc to rotate through a rotating mechanism to prevent the PVC sleeve on the disc from rotating on the disc. When inspecting the outside of the PVC sleeve, the rotation of the PVC sleeve can cooperate with the CCD camera to perform 360-degree external defect recognition, thereby improving the comprehensiveness of external defect detection of the PVC sleeve and further solving the problem that the CCD camera cannot fully recognize the external defects of the PVC sleeve due to the fixed position of the PVC sleeve.

[0025] 5. The present invention places the PVC sleeve on the disc, and the triangular blocks on both sides fit the outer wall of the PVC sleeve. The rebound force of the spring in the inner cavity of the positioning sleeve resists the positioning rod. The positioning rod pushes the triangular blocks to stably clamp the PVC sleeve and place it in the center of the disc, thereby preventing the PVC sleeve from being displaced when rotating with the disc, and improving the stability of the PVC sleeve rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the front three-dimensional structure of a PVC casing defect detection device based on visual recognition proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the back side three-dimensional structure of a PVC casing defect detection device based on visual recognition proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the back side three-dimensional structure of the adjustment mechanism of the PVC casing defect detection device based on visual recognition proposed by the present invention;

[0029] Figure 4 The present invention proposes a PVC casing defect detection device based on visual recognition Figure 3 A schematic diagram of the enlarged structure of part A;

[0030] Figure 5 This is a schematic diagram of the front side three-dimensional structure of the rotating mechanism of a PVC casing defect detection device based on visual recognition proposed by the present invention;

[0031] Figure 6 The present invention proposes a PVC casing defect detection device based on visual recognition Figure 5 Schematic diagram of the enlarged structure of part B.

[0032] In the figure: 1, bottom plate; 2, disc; 3, moving mechanism; 31, fixed rod; 32, sliding groove; 33, sliding table; 34, first motor; 35, screw rod; 4, adjusting mechanism; 401, fan-shaped plate; 402, movable rod; 403, guide groove; 404, guide rod; 405, limiting sleeve; 406, first cylinder; 407, positioning rod; 408, fixed plate; 409, lifting groove; 410, lifting rod; 411, second cylinder; 412, positioning groove; 413, positioning block; 414, sliding sleeve; 5, CCD camera; 6, rotating mechanism; 61, right-angle rod; 62, rotating shaft; 63, first gear; 64, second gear; 65, second motor; 7, clamping sleeve; 71, clamping rod; 72, spring; 73, triangular block. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0034] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. Unless otherwise specified, the "connection" and "coupling" in the present application include direct and indirect connection (coupling). In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0035] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] Reference Figures 1-6The utility model provides a kind of PVC sleeve defect detection device based on visual identification, including bottom plate 1, the rotating mechanism 6 of auxiliary PVC sleeve is equipped with for rotating detection in the top of bottom plate 1 near the front position, rotating mechanism 6 top is equipped with disc 2, the moving mechanism 3 for realizing position adjustment is equipped with in the top of bottom plate 1 near the back position, moving mechanism 3 top is equipped with CCD camera 5 by adjusting mechanism 4;

[0037] Adjusting mechanism 4 includes sector plate 401, sector plate 401 front is rotatably connected with movable rod 402, movable rod 402 is fixedly connected with guide rod 404 away from the one end of rotating center, the guide groove 403 that is cooperated with guide rod 404 is formed on sector plate 401, guide rod 404 passes through guide groove 403 and is slidably connected with guide groove 403, guide rod 404 is close to the one end of sector plate 401 back and is sleeved with limiting sleeve 405, sector plate 401 back is fixedly connected with first air cylinder 406, the first air cylinder 406 telescopic shaft is cooperated with limiting sleeve 405 and moves horizontally, movable rod 402 front is fixedly connected with fixed plate 408, fixed plate 408 inner chamber is slidably connected with lifting rod 410, CCD camera 5 is fixedly connected at the bottom of lifting rod 410, fixed plate 408 top is fixedly installed with second air cylinder 411, and the second air cylinder 411 telescopic shaft is cooperated with lifting rod 410 and is raised and lowered;

[0038] When using, by placing PVC sleeve is placed in disc 2, the second air cylinder 411 of flow adjusting mechanism 4 promotes lifting rod 410 to move downwards, and lifting rod 410 drives CCD camera 5 to go into the inner cavity of PVC sleeve, so that CCD camera 5 can more clearly identify the defects of the inner cavity of PVC sleeve, the first air cylinder 406 on the back of sector plate 401 promotes limiting sleeve 405 to slide horizontally, limiting sleeve 405 drives guide rod 404 to slide in guide groove 403, guide rod 404 slides and promotes movable rod 402 to rotate on sector plate 401, at this time, the angle of CCD camera 5 is deflected, so that the fine adjustment of the angle of CCD camera 5 is reached, in order to cooperate with the defect identification of the outside of PVC sleeve by CCD camera 5, sector plate 401 can be moved horizontally by moving mechanism 3, so that CCD camera 5 can be deflected by a larger angle to adapt to the defect detection condition of PVC sleeve of different models and sizes, the rotation of disc 2 driven by rotating mechanism 6 can cooperate with the defect identification of 360 degrees of the outside of the placed PVC sleeve by CCD camera 5, and the comprehensiveness of the detection of the inner cavity and the outside of PVC sleeve by CCD camera 5 is improved.

[0039] In particular, in the utility model, the two sides close to first air cylinder 406 of sector plate 401 back are fixedly connected with slide sleeve 414, the inner chamber of slide sleeve 414 is slidably connected with positioning rod 407, and positioning rod 407 is fixedly connected on one side of limiting sleeve 405;

[0040] In use, the first air cylinder 406 pushes the limiting sleeve 405 to move laterally, the positioning rods 407 on the two sides move along with the limiting sleeve 405 and slide in the inner cavity of the sliding sleeve 414, and the sliding sleeve 414 limits the rotation of the positioning rods 407 when moving laterally, so that the limiting sleeve 405 can stably move laterally.

[0041] In particular, the fixing plate 408 is provided with a lifting groove 409 in the inner cavity, the lifting rod 410 is slidingly connected in the inner cavity of the lifting groove 409, the lifting groove 409 is provided with a positioning groove 412 on each side, and the positioning block 413 is slidingly connected in the positioning groove 412 and fixedly connected to the outer wall of the lifting rod 410.

[0042] In use, the lifting rod 410 is pushed downward by the telescopic shaft of the second air cylinder 411, moves in the lifting groove 409 of the fixing plate 408, and the positioning block 413 cooperates with the positioning groove 412 to prevent the lifting rod 410 from deflecting when moving up and down, so that the CCD camera 5 does not deflect when moving up and down, and the error in defect identification of the PVC sleeve is avoided.

[0043] In particular, the moving mechanism 3 comprises a fixing rod 31 fixedly connected to the top of the bottom plate 1, the fixing rod 31 is provided with a sliding groove 32 in the top, the sliding groove 32 is slidingly connected with a sliding table 33 in the inner cavity, the fan-shaped plate 401 is fixedly connected to the top of the sliding table 33, the sliding table 33 is threadedly connected with a lead screw 35 at the bottom, one end of the lead screw 35 penetrates through one side of the fixing plate 408 and is rotationally connected with the fixing plate 408, the lead screw 35 is fixedly connected with a first motor 34 at the end, and the first motor 34 is fixedly connected to the top of the bottom plate 1.

[0044] In use, the first motor 34 drives the lead screw 35 to rotate, the lead screw 35 drives the sliding table 33 to move in the sliding groove 32 of the fixing rod 31 through thread driving, so that the sliding table 33 can move laterally conveniently, and the fan-shaped plate 401 can be driven to move when the sliding table 33 moves laterally, so that the CCD camera 5 can stably move laterally.

[0045] In particular, the rotating mechanism 6 comprises a right-angle rod 61 fixedly connected to the top of the bottom plate 1, a rotating shaft 62 rotationally connected to one end of the top of the right-angle rod 61, the rotating shaft 62 is fixedly connected to the bottom of the disc 2 at the axis, the other end of the rotating shaft 62 is rotationally connected to the top of the bottom plate 1, the first gear 63 is fixedly connected to the outer wall of the rotating shaft 62, the second motor 65 is fixedly connected to the top of the bottom plate 1, the second gear 64 is fixedly connected to the output end of the second motor 65, and the first gear 63 is engaged with the second gear 64.

[0046] In use, the first gear 63 and the second gear 64 are driven to rotate by the second motor 65, the rotating shaft 62 is located at the top of the bottom plate 1 and drives the disc 2 to rotate, the right-angle rod 61 supports the rotating shaft 62 to stably rotate, and the disc 2 rotates to drive the PVC sleeve placed on the top of the disc 2 to rotate, so that the PVC sleeve can rotate 360 degrees in cooperation with the CCD camera 5 when the external defects of the PVC sleeve are identified.

[0047] In particular, the disc 2 is fixedly connected with the clamping sleeve 7 on both sides near the axis of the disc 2, the clamping sleeve 7 is slidably connected with the clamping rod 71 in the inner cavity of the clamping sleeve 7, the clamping sleeve 7 is fixedly connected with the spring 72 in the inner cavity of the clamping sleeve 7, one end of the spring 72 is fixedly connected with the end of the clamping rod 71, and the clamping rod 71 is fixedly connected with the triangular block 73 on the opposite side.

[0048] In use, the PVC sleeve is placed on the axis at the top of the disc 2, the triangular blocks 73 on both sides are clamped to the PVC sleeve, and the spring 72 in the clamping sleeve 7 abuts against the clamping rod 71 to make the clamping rod 71 abut against the triangular blocks 73, so that the PVC sleeve can be stably placed on the top of the disc 2, and the displacement of the PVC sleeve caused by the rotation of the disc 2 is prevented, thereby avoiding errors caused by the identification of the defects on the outer surface of the PVC sleeve.

[0049] In use, the following steps are included:

[0050] S1: in use, after the bottom plate 1 is fixed, the PVC sleeve is placed on the top of the disc 2, the spring 72 in the clamping sleeve 7 abuts against the clamping rod 71, the outer end of the clamping rod 71 drives the triangular blocks 73 to abut against and abut against the PVC sleeve, and the PVC sleeve is stably placed on the axis at the top of the disc 2;

[0051] S2: the second cylinder 411 is used to drive the lifting rod 410 to move downwards, the lifting rod 410 moves downwards in the lifting groove 409 of the fixed plate 408, the limiting block moves downwards in the limiting groove while following the lifting rod 410, so that the lifting rod 410 does not deflect when moving downwards, and the CCD camera 5 moves downwards to the inner cavity of the PVC sleeve while following the bottom of the lifting rod 410, so that the CCD camera 5 can identify the defects of the inner cavity of the PVC sleeve, and the CCD camera 5 returns to the initial position after the identification of the inner cavity of the PVC sleeve is completed;

[0052] S3: when the external surface of the PVC sleeve is detected, the first motor 34 of the moving mechanism 3 drives the lead screw 35 to rotate, the lead screw 35 drives the sliding table 33 to move, the sliding table 33 moves in the sliding groove 32 of the fixed rod 31 and drives the sector plate 401 to move, the sector plate 401 moves to drive the CCD camera 5 to move laterally, and the CCD camera 5 is adjusted in position.

[0053] S4: fine-tuning the angle of the CCD camera 5, driving the limiting sleeve 405 by the first cylinder 406 of the adjusting mechanism 4, the limiting sleeve 405 moves laterally under the action of the positioning rod 407 and the sliding sleeve 414, the limiting sleeve 405 moves and drives the guide rod 404 to move in the guide groove 403, the guide rod 404 moves to make the movable rod 402 rotate in the front of the sector plate 401, the movable rod 402 rotates and drives the fixed plate 408 to rotate, the lifting rod 410 in the fixed plate 408 and the CCD camera 5 rotate with the fixed plate 408, at this time, the CCD camera 5 is fine-tuned in angle, at this time, the CCD camera 5 starts to identify defects on the outside of the PVC sleeve;

[0054] S5: when the angle adjustment of the CCD camera 5 is completed, the CCD camera 5 is directly opposite to the outside of the PVC sleeve, the second motor 65 of the rotating mechanism 6 is started, the second motor 65 drives the rotating shaft 62 to rotate through the cooperation of the first gear 63 and the second gear 64, the right-angle rod 61 supports the rotating shaft 62 to stably rotate, the rotating shaft 62 rotates and drives the disc 2 to rotate, the disc 2 rotates to make the PVC sleeve placed on the top of the disc 2 rotate;

[0055] S6: when the disc 2 rotates one circle, the PVC sleeve rotates one circle with the disc 2, at this time, the CCD camera 5 completes the full defect identification of 360 degrees on the outside of the PVC sleeve;

[0056] S7: reverse operation of the moving mechanism 3 and the adjusting mechanism 4 to make the CCD camera 5 return to the initial position, then the defect identification of one PVC sleeve is completed, and the above content is repeated again to identify the defects of the second PVC sleeve.

[0057] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the present application.

[0058] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A PVC casing defect detection device based on visual recognition, comprising a bottom plate (1), characterized in that: A rotating mechanism (6) for assisting the PVC sleeve in performing rotation detection is provided at the top of the bottom plate (1) near the front, and a disc (2) is provided at the top of the rotating mechanism (6). A moving mechanism (3) for achieving position adjustment is provided at the top of the bottom plate (1) near the back, and a CCD camera (5) is provided at the top of the moving mechanism (3) via an adjustment mechanism (4). The adjusting mechanism (4) comprises a fan-shaped plate (401), the front face of the fan-shaped plate (401) is rotatably connected to a movable rod (402), one end of the movable rod (402) away from the rotation center is fixedly connected to a guide rod (404), the fan-shaped plate (401) is provided with a guide groove (403) cooperating with the guide rod (404), the guide rod (404) passes through the guide groove (403) and is slidably connected to the guide groove (403), the guide rod (404) is sleeved with a limiting sleeve (405) at one end close to the back face of the fan-shaped plate (401), and the fan-shaped plate (401) is provided with a guide groove (403) cooperating with the guide rod (404). The back of the plate (401) is fixedly connected to a first cylinder (406), the telescopic shaft of the first cylinder (406) cooperates with the limit sleeve (405) to move laterally, the front of the movable rod (402) is fixedly connected to a fixed plate (408), the inner cavity of the fixed plate (408) is slidably connected to a lifting rod (410), the CCD camera (5) is fixedly connected to the bottom end of the lifting rod (410), and the top of the fixed plate (408) is fixedly installed with a second cylinder (411), and the telescopic shaft of the second cylinder (411) cooperates with the lifting rod (410) to move up and down.

2. The PVC casing defect detection device based on visual recognition according to claim 1 is characterized in that: Both sides of the back side of the sector plate (401) close to the first cylinder (406) are fixedly connected with a sliding sleeve (414), the inner cavity of the sliding sleeve (414) is slidably connected with a positioning rod (407), and the positioning rod (407) is fixedly connected to one side of the limiting sleeve (405).

3. The PVC casing defect detection device based on visual recognition according to claim 1 is characterized in that: The inner cavity of the fixed plate (408) is provided with a lifting groove (409), and the lifting rod (410) is slidably connected to the inside of the lifting groove (409). Positioning grooves (412) are provided on both sides of the lifting groove (409), and a positioning block (413) is slidably connected in the positioning groove (412). The positioning block (413) is fixedly connected to the outer wall of the lifting rod (410).

4. The PVC casing defect detection device based on visual recognition according to claim 1 is characterized in that: The moving mechanism (3) includes a fixed rod (31), the fixed rod (31) is fixedly connected to the top of the base plate (1), a sliding groove (32) is provided on the fixed top, a sliding platform (33) is slidably connected to the inner cavity of the sliding groove (32), and the fan-shaped plate (401) is fixedly connected to the top of the sliding platform (33).

5. The PVC casing defect detection device based on visual recognition according to claim 4 is characterized in that: The bottom of the slide (33) is threadedly connected to a screw rod (35), one end of which passes through one side of the fixed plate (408) and is rotatably connected to the fixed plate (408), and the end of the screw rod (35) is fixedly connected to a first motor (34), which is fixedly connected to the top of the base plate (1).

6. The PVC casing defect detection device based on visual recognition according to claim 1 is characterized in that: The rotating mechanism (6) comprises a right-angle rod (61), the right-angle rod (61) being fixedly connected to the top of the base plate (1), one end of the top of the right-angle rod (61) being rotatably connected to a rotating shaft (62), one end of the rotating shaft (62) being fixedly connected to the bottom axis of the disc (2), and the other end of the rotating shaft (62) being rotatably connected to the top of the base plate (1).

7. The PVC casing defect detection device based on visual recognition according to claim 6 is characterized in that: The outer wall of the rotating shaft (62) is fixedly connected to a first gear (63), the top of the bottom plate (1) is fixedly connected to a second motor (65), the output end of the second motor (65) is fixedly connected to a second gear (64), and the first gear (63) is meshed with the second gear (64).

8. The PVC casing defect detection device based on visual recognition according to claim 1 is characterized in that: A locking sleeve (7) is fixedly connected to both sides of the top of the disc (2) near the axis of the disc (2); a locking rod (71) is slidably connected to the inner cavity of the locking sleeve (7); a spring (72) is fixedly connected to the inner cavity of the locking sleeve (7); one end of the spring (72) is fixedly connected to the end of the locking rod (71); and a triangular block (73) is fixedly connected to the opposite side of the locking rod (71).

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