Optical dimension detection device and method for automotive non-coplanar tubes

Abstract

The application relates to an optical size detection device and method for a non-coplanar pipe fitting of a steam engine and belongs to the field of optical detection of steam engine parts. The optical size detection device for the non-coplanar pipe fitting of a steam engine comprises an optical detection mechanism for photographing and recognizing imaging of a piece to be detected, mounting tools respectively located at two ends of the piece to be detected, and plug shafts fixed on the mounting tools and inserted into the piece to be detected; two groups of the mounting tools at the ends lift up the two ends of the piece to be detected, limit pieces matched with the bending degrees of the ends of the piece to be detected are installed in the plug shafts, and the limit pieces are attached to the curved surfaces of the ends of the piece to be detected; the piece to be detected is lifted up to a suspended state through the two-end mounting tools, the traditional platform placement or clamping mode is changed, the circumferential curved surface of the pipe fitting is exposed, the up-and-down groove design in the middle of a chain conveyor is matched, the splicing error is greatly reduced, and the geometric fidelity and detection accuracy of the model are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of optical inspection technology for automotive and motorcycle parts, and in particular to an optical dimension inspection device and method for non-coplanar tubular components in automotive and motorcycle parts. Background Technology

[0002] In the automotive and motorcycle industry, non-coplanar pipe fittings such as exhaust pipes, due to their complex spatial curvature, require rigorous inspection of key dimensions such as length, diameter, and bending angle after manufacturing. Currently, the industry commonly uses machine vision-based 3D scanning equipment for automated inspection. This type of equipment typically places the part to be inspected in a closed chamber or working cavity, using a projected light source and multiple cameras to acquire images. Algorithms then reconstruct a 3D model to determine dimensional compliance.

[0003] However, existing 3D optical inspection methods have the following significant drawbacks in practical applications: Since exhaust pipes are non-coplanar irregular components, their structure is prone to self-occlusion; in enclosed or semi-enclosed equipment, single or fixed-view camera arrays struggle to capture the feature information of the inner curved side, resulting in visual blind spots; the system must rely on multi-view stitching or algorithms to fit and complete missing data, which not only significantly increases the processing complexity of point cloud data but also introduces additional stitching errors, reducing the geometric fidelity of the final model; the placement of the inspected part on the turntable or working plane inside the equipment is random, causing angular deviations between the optical reference axis of the scanning system and the actual features of the pipe; to obtain complete point cloud data, either the posture of the robotic arm or light source probe needs frequent adjustment to track features, significantly extending the single-piece scanning cycle; or reliance on post-processing algorithms for tedious coordinate alignment and registration, making the inspection results overly dependent on software algorithms and lacking intuitive physical references. Summary of the Invention

[0004] Therefore, it is necessary to provide an optical dimension detection device and method for non-coplanar tubular components in automobiles and motorcycles to address the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An optical dimension inspection device for automotive and motorcycle non-coplanar tubular components includes an optical inspection mechanism for photographing and identifying the component to be inspected, and includes mounting fixtures located at both ends of the component to be inspected. Each mounting fixture has a shaft for inserting into the component to be inspected. The two sets of mounting fixtures at the ends support the two ends of the component to be inspected, and each shaft has a limiting member that matches the curvature of the end of the component to be inspected. The limiting member is in contact with the curved surface of the end of the component to be inspected.

[0006] Preferably, the insert shaft is provided with a fixing device for fixing the insert shaft to the inner surface of the workpiece to be tested; The fixing device includes a pulling mechanism rotatably connected to the rotating rod and a pulling mechanism for pulling the rotating rod to rotate, and a limiting plate is rotatably connected to the rotating rod.

[0007] Preferably, the device further includes a chain conveyor, with two sets of the installation fixtures spaced apart on the chain conveyor; wherein the middle portion of the chain conveyor is provided with upper and lower empty slots, and the optical inspection mechanism is located in the empty slot of the chain conveyor.

[0008] Furthermore, the multiple optical detection mechanisms are arranged in a ring shape.

[0009] Furthermore, it also includes a bottom support frame, the lower end of which is mounted on the chain of the chain conveyor via a mounting bracket, and the mounting fixture is mounted on the bottom support frame by bolts.

[0010] Furthermore, the rotating pull rod is tilted toward the object to be tested.

[0011] Furthermore, the pulling mechanism includes a sliding ring slidably connected to the insert shaft, a ring shaft fixedly connected to the sliding ring, the ring shaft being inserted into a sliding groove on the rotating pull rod, a rotating base threadedly connected to the insert shaft, the rotating base being rotatably connected to the sliding ring, an electric motor fixedly connected to the insert shaft, a gear groove fixedly connected to the electric motor, and the gear groove meshing with the rotating base.

[0012] Preferably, the installation fixture is provided with a telescopic rod, which can be driven by electricity or hydraulic power, and the insertion shaft is installed at the telescopic end of the telescopic rod.

[0013] Preferably, the limiting member located at the tail end of the test piece is configured as two relatively sliding parts; wherein, when the limiting member is not in the test piece, the two parts are close to each other, and after the limiting member enters the test piece, the two parts move away from each other until they are in contact with the test piece.

[0014] An optical dimension inspection method for automotive and motorcycle non-coplanar tubular components, comprising an optical dimension inspection device for automotive and motorcycle non-coplanar tubular components, mainly including the following steps: Step 1: Installation and positioning of the first end of the part to be tested; Step 2: Installation and positioning of the end of the component to be tested; Step 3: Perform comprehensive optical inspection on the part to be inspected; In the case where the limiting member is inserted into the bent end of the part to be tested, the two ends of the part to be tested are lifted into a suspended state and passed through the optical testing mechanism. Step four: The unloading of the parts to be tested and the cyclic resetting of the installation fixtures.

[0015] Compared with the prior art, the present invention provides an optical dimension detection device and method for automotive and motorcycle non-coplanar tubular components, which has the following advantages: This invention uses tooling installed at both ends to lift the part to be tested into a suspended state, which changes the traditional platform placement or clamping method. The circumferential curved surface of the pipe is exposed. Combined with the upper and lower slot design in the middle of the chain conveyor, the surrounding ring optical inspection mechanism can capture the feature information of the whole pipe without blind spots, which greatly reduces splicing error and significantly improves the geometric fidelity and inspection accuracy of the model. This invention provides strong circumferential constraints on non-coplanar pipes by using a limiting component to fit and support the curved surface of the pipe, combined with the axial tightening of the fixing device. This prevents the pipes from rotating around the axis and ensures that each piece under test has a completely consistent spatial posture during testing. External light sources and cameras do not need to be frequently adjusted, reducing excessive reliance on software algorithms. This invention integrates specific clamping fixtures onto a chain conveyor, thereby achieving continuous automation of the inspection process; This invention integrates a thin-film pressure sensor on a segmented limiting component, enabling real-time monitoring of the contact pressure between the pipe and the limiting component during installation. When eccentric insertion or abnormal rebound of the pipe occurs, the pressure difference between the upper and lower sensors will exceed the threshold. Based on this, the system can assist operators or automatically determine that the workpiece's shape and position error exceeds the standard, effectively avoiding misjudging defective products as qualified products and further ensuring the quality of products leaving the factory. Attached Figure Description

[0016] Figure 1 This is a top view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the bottom support structure in this invention; Figure 4 This is a schematic diagram of the installation fixture in this invention; Figure 5 For the present invention Figure 4 Enlarged view of section A; Figure 6 This is a schematic diagram of the telescopic rod in this invention; Figure 7 For the present invention Figure 6 Enlarged view of section B; Figure 8 This is a schematic diagram of the limiting component in this invention; Figure 9 This is a cross-sectional structural diagram of the present invention.

[0017] In the diagram: 1. Chain conveyor; 2. Bottom support frame; 201. Mounting frame; 3. Mounting fixture; 301. Telescopic rod; 302. Insert shaft; 303. Limiting component; 4. Limiting plate; 401. Rotating tie rod; 402. Sliding groove; 403. Sliding ring; 404. Ring shaft; 405. Rotating base; 406. Gear groove; 407. Electric motor; 5. Piston cylinder; 501. Sliding column; 502. Air guide hole; 6. Part to be tested. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0019] Example 1: Non-coplanar pipe fittings refer to pipe fittings in which the centerlines of each bent section of the pipe are not on the same plane. A typical application in the automotive and motorcycle industry is the exhaust pipe structure. This application takes automotive and motorcycle exhaust pipes as an example. Existing exhaust pipe production largely relies on pipe bending machines. To improve the quality of the finished product, it is necessary to perform multi-dimensional dimensional inspections on the bent exhaust pipe, including length, diameter, and bending angle. Existing technologies often use 3D scanners, which work by placing the part to be inspected (6) inside the equipment, using a projected light source and multiple cameras to acquire images, and then reconstructing a 3D model through algorithm compensation to determine dimensional compliance. During optical inspection using 3D scanning equipment, due to the use of a closed or semi-closed structure, the part to be inspected (6) usually needs to be placed on the turntable or working plane inside the equipment. Limited by the complex spatial orientation of the exhaust pipe and the obstruction of its own solid structure, single-view or fixed-view camera arrays have visual dead zones. This results in the inability to directly collect feature information on at least one side or the inner side of a partial bend in the pipe. Consequently, the system must rely on multi-view stitching or algorithms to fit and complete the missing data. This not only increases the processing complexity of point cloud data but also introduces additional stitching errors, reducing the geometric fidelity of the model. Furthermore, due to the randomness of the turntable or working plane inside the equipment, the placement of the part to be inspected (6) cannot be guaranteed to be the same each time. This leads to an angular deviation between the optical reference axis of the scanning system and the actual features of the pipe. To obtain complete point cloud data, either the posture of the robotic arm or the light source probe needs to be frequently adjusted to track the features, significantly extending the single-piece scanning cycle; or post-processing algorithms are needed for coordinate alignment and registration. This makes the inspection results overly reliant on software algorithms, lacking intuitive physical references, and failing to meet the industrial demand for high-precision, high-efficiency online full inspection. Therefore, this reference Figure 1 , Figure 2An optical dimension inspection device for non-coplanar tubular components in automotive and motorcycle parts includes mounting fixtures 3 located at both ends of a component 6 to be inspected. Each mounting fixture 3 has a shaft 302 fixed to it for inserting into the component 6. The mounting positions of the two mounting fixtures 3 are relatively fixed. The two sets of mounting fixtures 3 at the ends support the two ends of the component 6 in mid-air. When a light source and camera are set on the circumferential surface of the component 6 to take pictures, the entire circumferential surface of the component 6 can be photographed, making the imaging more intuitive, reducing the splicing error of the optical inspection mechanism, and improving the accuracy of the inspection results; wherein, reference... Figure 6 , Figure 7 , Figure 8 The insert shaft 302 is equipped with a limiting member 303 that matches the curvature of the end of the part to be tested 6. After the insert shaft 302 is inserted into the part to be tested 6, the limiting member 303 is in contact with the first set of curved surfaces at the end of the part to be tested 6. Since both ends of the part to be tested 6 are limited by the limiting member 303, and the axial diameters of the pipes at both ends are not on the same plane, it has a good self-locking effect, preventing shaking during transportation. Furthermore, by cooperating with the limiting member 303, the inner wall of the pipe of the part to be tested 6 can be supported and fixed, which can solve the problem of partial obstruction caused by fixing with external tooling. Specifically, refer to Figure 7 After the operator inserts the straight end of the workpiece 6 to be tested into the insert shaft 302, the limiting member 303 at the end of the insert shaft 302 will gradually slide to contact the curved surface of the workpiece 6 to support the curved surface of the workpiece 6. A fixing device is set on the insert shaft 302 to fix the insert shaft 302 to the inner surface of the workpiece 6. Since the fixing device usually provides axial support for the workpiece 6 when fixing one end of the workpiece 6, the center of gravity of the workpiece 6 is deviated from the axis of the insert shaft 302, which is prone to shaking and rotation. At this time, the contact part between the limiting member 303 and the workpiece 6 can apply a certain circumferential support force to the workpiece 6 to prevent the workpiece 6 from rotating around the straight end, and to position the posture of the workpiece 6 in the same way, so as to ensure the consistency of the workpiece 6 during testing. This allows the light source angle to be fixed when setting up the light source, without the need to frequently adjust the light source illumination angle, thus improving the accuracy of the test results. In one specific implementation, refer to Figure 7 When manual feeding is used, the limiting member 303 cannot fully fit the bent part of the test piece 6 when the manual inserter inserts it into the insertion shaft 302. At this time, the operator gently pushes the test piece 6 into the insertion shaft 302. Under the action of the limiting member 303, the test piece 6 rotates slightly and is locked with the limiting member 303 to achieve the initial positioning of this end and prevent rotation during subsequent inspection and transportation. In one specific embodiment, since the 3D scanning instrument has a semi-enclosed or enclosed structure, it is not easy to carry out continuous production in the workshop, therefore, referring to... Figure 1 , Figure 2 The present invention also includes a chain conveyor 1, and two sets of installation fixtures 3 are installed on the chain conveyor 1 at intervals. The middle part of the chain conveyor 1 is provided with upper and lower empty slots. The upper and lower ends of the empty slots of the chain conveyor 1 are provided with optical detection mechanisms for detecting the workpiece 6 to be tested. The optical detection mechanisms are arranged in a ring, so that the workpiece 6 to be tested can pass through the middle part of the ring, thereby realizing the all-round scanning and imaging of the workpiece 6 to be tested. In one specific implementation, refer to Figure 3 , Figure 4 , Figure 8 It also includes a bottom support 2. The lower end of the bottom support 2 is mounted on the chain of the chain conveyor 1 via a mounting bracket 201. The mounting fixture 3 is mounted on the bottom support 2 by bolts and is used to install the mounting fixture 3. It is suitable for optical dimension detection of non-coplanar pipe fittings of different shapes and has strong adaptability. In one specific implementation, refer to Figure 4 , Figure 5 When the workpiece 6 to be tested is manually inserted into the insertion shaft 302 at one end, the fixing device includes a rotating pull rod 401 rotatably connected to the insertion shaft 302 and a pulling mechanism for pulling the rotating pull rod 401 to rotate. A limiting plate 4 is rotatably connected to the rotating pull rod 401. The rotating pull rod 401 is inclined toward the workpiece 6 to be tested. When the pulling mechanism pulls the rotating pull rod 401 to rotate, the rotating pull rod 401 will move the limiting plate 4 toward the inner wall of the workpiece 6 to fit tightly. At this time, the limiting plate 4 is used to support the lightweight workpiece 6 to be tested. Among them, the rotating pull rod 401 moves towards the installation fixture 3, which can further push the limit plate 4 to tighten towards the installation fixture 3, assist in clamping the part to be tested 6, assist in compensating for insufficient insertion force during manual installation, prevent the part to be tested 6 from falling off, make its positioning more accurate, and thus improve its testing accuracy. In one specific implementation, refer to Figure 5 , Figure 6 , Figure 7 The pulling mechanism includes a sliding ring 403 slidably connected to the insert shaft 302, a ring shaft 404 fixedly connected to the sliding ring 403, the ring shaft 404 being inserted into the sliding groove 402 on the rotating pull rod 401, a rotating base 405 threadedly connected to the insert shaft 302, the rotating base 405 being rotatably connected to the sliding ring 403, an electric motor 407 fixedly connected to the insert shaft 302, a gear groove 406 fixedly connected to the electric motor 407, the gear groove 406 meshing with the rotating base 405, and through the threaded connection of the rotating base 405, the sliding ring 403 can be prevented from returning to its original position after being pulled, thus ensuring the stability of the fixed support of the test piece 6; In one specific implementation, refer to Figure 1 , Figure 4 , Figure 8 When the mounting fixture 3 located at the lower end of the chain conveyor 1 moves to the upper end, the person manually inserts one end of the part to be tested 6 into the insertion shaft 302, and fixes it by the limiting plate 4 and the fixing device. As the chain conveyor 1 moves, the mounting fixture 3 at the other end also moves to the upper end. In order to facilitate the insertion of the insertion shaft 302 into the part to be tested 6, a telescopic rod 301 is provided on the mounting fixture 3, which can be driven by electricity or hydraulics. The insertion shaft 302 is installed on the telescopic end of the telescopic rod 301. In order to facilitate the insertion shaft 302 on the non-installed side of the mounting fixture 3 into the part to be tested 6, the limiting member 303 is designed as two parts that slide relative to each other. When not entering the part to be tested 6, the two parts are close to each other. After entering the part to be tested 6, the two parts move away from each other to the side of the part to be tested 6. The upper and lower curved parts are supported and limited, and the straight part on the other side is supported by a fixing device to complete the installation of the part to be tested 6. When the two mounting fixtures 3 drive the part to be tested 6 through the optical inspection mechanism, optical dimension inspection can be performed. After the inspection is completed, in order to facilitate the unloading of the part to be tested 6, the fixing device and limiting device 303 in the moving forward direction are first disengaged by the telescopic rod 301, so that this section is unsupported. Another conveyor belt is set in the conveying direction of the chain conveyor 1. When the disengaged mounting fixture 3 gradually moves to the lower end of the chain conveyor 1, the part to be tested 6 is also located on the conveyor belt. At this time, the fixing device and limiting device 303 at the other end are disengaged, and the inspection of the part to be tested 6 can be completed, so that continuous inspection can be performed and the inspection efficiency can be improved. In one specific implementation, refer to Figure 9 The split-type limiting component 303 is driven by pneumatic pressure. Specifically, a piston cylinder 5 is fixedly connected to the insertion shaft 302, and a sliding column 501 is slidably connected inside the piston cylinder 5. The sliding column 501 is connected to the split-type limiting component 303, and an air guide hole 502 is connected to the piston cylinder 5. In the installation process, since one end is already fixed, if the insertion shaft 302 at the other end cannot be inserted into the test piece 6, it indicates that the production of the test piece 6 is obviously unqualified. If it can be inserted but with a slight deviation, the limiting component 303 will forcibly overcome the rebound force of the test piece 6, causing the optical inspection mechanism to take a corrected image, affecting the accuracy of the inspection results. Therefore, thin-film pressure sensors are set at the upper and lower ends of the split-type limiting component 303. When eccentricity occurs, the pressure data transmitted by the two thin-film pressure sensors will be different, assisting the operator in judging whether the error of the test piece 6 is within a reasonable range.

[0020] Example 2: An optical dimension inspection method for non-coplanar tubular components in automotive and motorcycle applications, mainly including the following steps: Step 1: Installation and positioning of the front end of component 6 to be tested; When the chain conveyor 1 is in standby mode, a set of installation fixtures 3 located at the feeding end moves to a high position with the chain. At this time, the telescopic rod 301 installed on the installation fixture 3 is in the extended state, and the insertion shaft 302 is in a position that is easy to operate. At the same time, the split-type limiting member 303 inside the insertion shaft 302 is in the retracted state, and the limiting plate 4 of the fixing device is in the retracted state, waiting for feeding. The operator inserts one straight end of the part to be tested 6 into the insert shaft 302 located at the clamping station. As the insert shaft 302 goes deeper into the pipe, the limiting part 303 at the end of the insert shaft 302 gradually slides and contacts the first set of curved surfaces at the end of the part to be tested 6, providing initial support. The fixing device inside the insertion shaft 302 is activated. The electric motor 407 drives the rotating base 405 to rotate through the gear groove 406, and drives the sliding ring 403 to move axially through the threaded engagement. The sliding ring 403, through the engagement of the ring shaft 404 and the sliding groove 402, drives the rotating rod 401 to swing inward into the tube, so that the limiting plate 4 is tightly attached to the inner wall of the part to be tested 6; at the same time, the axial component force generated by the rotating rod 401 tightens the tube towards the mounting fixture 3, completing the rigid fixation and anti-rotation locking of the head end; Step 2: Installation and positioning of the end of the component to be tested, part 6; As the chain conveyor 1 advances, the part to be tested 6 is carried to the next station by the first-end mounting fixture 3. At this time, the other end mounting fixture 3 moves to the clamping station and activates the telescopic rod 301 on the mounting fixture 3, driving the insertion shaft 302 to move to the other end of the part to be tested 6. The limiting member 303 at the front end of the insertion shaft 302 enters the pipe opening. After entering, the air pressure enters the piston cylinder 5 through the air guide hole 502, driving the sliding column 501 to push the two limiting members 303 to open until they fit against the curved surfaces of the upper and lower inner walls of the pipe. During this process, if the workpiece 6 under test has a bending angle deviation, the thin film pressure sensor integrated at the upper and lower ends of the limiting member 303 will detect the pressure difference. The system will then use this to help determine whether the workpiece error exceeds the limit. Subsequently, the end fixing device will be activated to lock and fix the end. At this time, the workpiece 6 under test will be lifted by both ends and will be in a suspended state, and its posture will be uniquely determined. Step 3: Perform all-around optical inspection on part 6 to be inspected; Two sets of installation fixtures 3 carry the fixed test piece 6 and pass horizontally through the middle inspection area with the chain conveyor 1. Since the chain conveyor 1 has upper and lower slots in the middle, and optical inspection mechanisms are arranged in a ring above, below and on both sides of the slots, the test piece 6 passes through the center of the ring field of view. Thanks to the suspended mounting method of the test piece 6 and the anti-rotation positioning at both ends, there is no obstruction around the pipe. Each optical inspection mechanism does not need to adjust its angle and can complete the scanning of the entire length of the pipe and the inner side of the bend in one go without dead angles to obtain high-precision point cloud data. Step 4: The unloading of part 6 to be tested and the cyclic resetting of the installation fixture 3; After the inspection is completed, the chain conveyor 1 continues to operate. First, the telescopic rod 301 at the forward direction end retracts, driving the insertion shaft 302 out of the tube. At the same time, the fixing device and limiter 303 at this end are reset and released. As the chain flips downward, the workpiece 6 to be inspected, which has lost support at one end, falls smoothly onto the unloading conveyor belt below. When the installation fixture 3 runs to the low position, the installation fixture 3 at the other end also arrives at the unloading area. At this time, the fixing device and limiter 303 at the other end are released, and the workpiece 6 to be inspected is completely released. The unloading conveyor belt transports the workpiece away. The two sets of installation fixtures 3 rotate back to the initial loading position with the chain, ready for the next work cycle.

Claims

1. An optical dimension inspection device for non-coplanar tubular components in automobiles and motorcycles, comprising an optical inspection mechanism for photographing and identifying the component (6) to be inspected, characterized in that, Includes mounting fixtures (3) located at both ends of the test piece (6), and the mounting fixtures (3) are fixed with insert shafts (302) for inserting into the test piece (6); Among them, the two sets of mounting fixtures (3) located at the ends support the two ends of the part to be tested (6) and hang it in the air. The insert shaft (302) is equipped with a limiting member (303) that matches the curvature of the end of the part to be tested (6). The limiting member (303) is in contact with the curved surface of the end of the part to be tested (6). The insert shaft (302) is provided with a fixing device for fixing the insert shaft (302) and the inner surface contact surface of the workpiece to be tested (6); The fixing device includes a rotating pull rod (401) rotatably connected to the insert shaft (302) and a pulling mechanism for pulling the rotating pull rod (401) to rotate. A limit plate (4) is rotatably connected to the rotating pull rod (401). The installation fixture (3) is provided with a telescopic rod (301), which is driven by electric or hydraulic power, and the insertion shaft (302) is installed on the telescopic end of the telescopic rod (301); The limiting member (303) located at the tail end of the test piece (6) is configured as two relatively sliding parts; When the limiting member (303) has not entered the test piece (6), the two parts are close to each other. After the limiting member (303) enters the test piece (6), the two parts move away from each other until they are in contact with the test piece (6). Thin-film pressure sensors are provided at the upper and lower ends of the segmented limiting member (303).

2. The optical dimension detection device for non-coplanar tubular components in automobiles and motorcycles according to claim 1, characterized in that, It also includes a chain conveyor (1), with two sets of the installation fixtures (3) installed at intervals on the chain conveyor (1); The middle part of the chain conveyor (1) is provided with upper and lower empty slots, and the optical detection mechanism is located in the empty slot of the chain conveyor (1).

3. The optical dimension detection device for non-coplanar tubular components in automobiles and motorcycles according to claim 2, characterized in that, The optical detection mechanisms are arranged in a ring.

4. The optical dimension detection device for non-coplanar tubular components in automobiles and motorcycles according to claim 2, characterized in that, It also includes a bottom support frame (2), the lower end of which is mounted on the chain of the chain conveyor (1) via a mounting bracket (201), and the mounting fixture (3) is mounted on the bottom support frame (2) by bolts.

5. The optical dimension detection device for non-coplanar tubular components in automobiles and motorcycles according to claim 1, characterized in that, The rotating pull rod (401) is tilted toward the part to be tested (6).

6. The optical dimension detection device for non-coplanar tubular components in automobiles and motorcycles according to claim 1, characterized in that, The pulling mechanism includes a sliding ring (403) slidably connected to the insert shaft (302), a ring shaft (404) fixedly connected to the sliding ring (403), the ring shaft (404) being inserted into the sliding groove (402) on the rotating pull rod (401), a rotating base (405) threadedly connected to the insert shaft (302), the rotating base (405) being rotatably connected to the sliding ring (403), an electric motor (407) fixedly connected to the insert shaft (302), a gear groove (406) fixedly connected to the electric motor (407), and the gear groove (406) meshing with the rotating base (405).

7. A method for optical dimension inspection of non-coplanar tubular components for automotive and motorcycle applications, comprising the optical dimension inspection device for non-coplanar tubular components for automotive and motorcycle applications as described in claim 6, characterized in that, The main steps include: Step 1: Installation and positioning of the first end of the part to be tested (6); Step 2, installation and positioning of the end of the part to be tested (6); Step 3: Perform all-round optical inspection on the part to be inspected (6); In the case where the limiting member (303) is inserted into the bent end of the test piece (6), the two ends of the test piece (6) are lifted up and suspended in the air before passing through the optical inspection mechanism. Step 4: The unloading of the part to be tested (6) and the cyclic resetting of the installation fixture.

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