A bumper paint defect detection device and detection method

Abstract

The application belongs to the technical field of detection equipment, and particularly relates to a bumper paint surface defect detection device and a detection method, which comprises a track-type conveyor and a tunnel-type detection table; further comprises a follow-up mechanism, the bumper is installed on the follow-up mechanism, and the follow-up mechanism is used for adjusting the relative angle of the bumper and the tunnel-type detection table; the follow-up assembly is arranged in the application, in the process of bumper transportation, the meshing transmission of the first transmission wheel and the swing rack causes the bumper to swing in the horizontal direction in the detection process, through the swing operation, not only the curved surfaces at both ends of the bumper enter the detection range of the machine vision detection module, but also the detection efficiency of the bumper paint surface defects is further enhanced through the shooting of the same position at different angles for multiple times.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of detection equipment, in particular to a bumper paint surface defect detection device and method. BACKGROUND

[0002] Bumper paint surface defect detection is an important quality control link in the production process of bumpers, which can ensure the integrity and aesthetics of the paint surface of the automobile bumper during production. By using advanced detection technology, defects such as scratches, dents, and color differences on the paint surface can be found and repaired in a timely manner, thereby improving the overall quality of the product.

[0003] With the gradual deepening of the intelligent degree of the automobile manufacturing industry, the automation degree of bumper paint surface defect detection has also been significantly improved. Bumper automated detection technology can automatically identify and classify various defects on the bumper paint surface by integrating advanced image processing technology and machine vision algorithms, achieving rapid positioning and accurate measurement of defects. This technology usually includes high-resolution cameras, lighting systems, image acquisition cards, and specialized image processing software. In practical applications, the camera first captures the image of the bumper surface, and then the image processing software analyzes the image, identifies the defect area through algorithms, and classifies the defect type and severity according to the preset standards. In addition, some advanced systems can also combine machine learning technology to continuously learn and optimize, improving the accuracy and efficiency of detection. In this way, the detection process is not only efficient, but also has greatly improved accuracy, greatly reducing the error and cost of manual detection.

[0004] For example, a device for detecting defects on the surface of an automobile bumper is disclosed in the related art, with application number CN2023210829720. This scheme includes a guide rail, a hanger mounted on the guide rail for suspending the automobile bumper, a tunnel-type machine table is provided on the guide rail, an image acquisition device for collecting the image of the surface of the automobile bumper is installed on the tunnel-type machine table, the image acquisition device includes an imaging module and an imaging adaptive mechanism that can automatically follow the curvature changes of the surface of the automobile bumper. This device does not need to set up a large separate detection area, and can adapt to the detection of different models of automobile bumpers without the need to increase the light source and camera. However, in actual application, it is found that although the tunnel-type detection can greatly improve the detection rate during the batch detection of bumpers, the camera has different imaging accuracy for the surface of the bumper due to the three-dimensional structure of the bumper and the fixed installation of the bumper on the hanger, which affects the detection probability of bumper paint surface defects.

[0005] In view of this, the present application proposes a bumper paint surface defect detection device and method to solve the above technical problems. SUMMARY

[0006] In order to make up for the deficiencies of the prior art, solve the above technical problems, the bumper paint surface defect detection device and detection method are provided.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the bumper paint surface defect detection device comprises a track-type conveyor and a tunnel-type detection table.

[0008] The track-type conveyor is used for transporting bumpers.

[0009] The tunnel-type detection table is located on the extended path of the track-type conveyor, and a machine vision detection module is installed on one side of the tunnel-type detection table, which is used for automatically detecting the bumper paint surface defects.

[0010] It also includes a follow-up mechanism, the bumper is installed on the follow-up mechanism, and the follow-up mechanism is used for adjusting the relative angle between the bumper and the tunnel-type detection table.

[0011] The follow-up mechanism comprises a support shaft, a hanger, a swing shaft and a swing rack.

[0012] The support shaft is fixedly installed on the track-type conveyor, the hanger is rotatably installed on the support shaft, and the bumper is detachably fixedly installed on the hanger.

[0013] The swing shaft is vertically installed at the top end of the hanger, the first transmission wheel is fixedly installed on the swing shaft, a plurality of swing racks are fixedly installed in the tunnel-type detection table, and the swing racks are located on both sides of the movement path of the first transmission wheel.

[0014] Preferably, the follow-up mechanism further comprises a deflection shaft, a worm gear, a transmission worm and a deflection rack.

[0015] The hanger comprises a frame body and a clamp, the deflection shaft is rotatably installed on the frame body in a horizontal arrangement, the clamp is fixedly installed on the deflection shaft, and the bumper is detachably fixedly installed on the clamp.

[0016] The worm gear is fixedly installed on the deflection shaft, the transmission worm is rotatably installed on the frame body, the transmission worm and the worm gear are in meshing connection, the second transmission wheel is fixedly installed on the transmission worm, and a plurality of deflection racks are installed in the tunnel-type detection table, and the deflection racks are located on both sides of the movement path of the second transmission wheel.

[0017] Preferably, a limiting block is fixedly installed on the supporting shaft, a limiting slot is formed in the frame body, the limiting block is located in the limiting slot in an initial state, a lifting rail is fixedly installed on the tunnel type detection device, the lifting rail is an arc structure with a high middle and low ends, a bearing block is fixedly installed at the top end of the swing shaft, and the ends of the lifting rail are located on both sides of the movement path of the bearing block.

[0018] Preferably, a sliding ring is sleeved on the bearing block, and the bearing block and the sliding ring are connected through a rolling bearing.

[0019] Preferably, a first reset elastic member and a second reset elastic member are fixedly installed on the frame body, and the first reset elastic member and the second reset elastic member are respectively extended and fixed on the supporting shaft and the deflection shaft.

[0020] Preferably, the frame body comprises a top rod, a bottom rod and an expansion piece, the expansion piece is connected with the top rod and the bottom rod at both ends, and the deflection shaft is installed on the expansion piece.

[0021] Preferably, the expansion piece is a combination of a cross shear type support and a mounting block, and the deflection shaft is installed on the mounting block.

[0022] Preferably, the top rod and the bottom rod are both hingedly installed with a yawing rod, the yawing rod is divided into two groups, and the expansion piece is hingedly connected with the two groups of yawing rods.

[0023] Preferably, a telescopic rod is fixedly installed on the adjacent two mounting blocks.

[0024] A bumper paint surface defect detection method, the detection method comprising the following steps:

[0025] S1: the bumper is installed on the hanger, and is conveyed along a pre-set route by the rail type conveyor, and after successively passing through the spraying and drying processes, enters the paint surface defect detection process;

[0026] S2: with the continuous operation of the rail type conveyor, the bearing block on the swing shaft gradually moves to the lifting rail, and is in contact with the lifting rail through the sliding ring sleeved at the bottom, and under the guidance of the lifting rail, the swing shaft pulls the top rod to rise;

[0027] S3: in the process of the rising of the top rod, the yawing rod is first deflected and then rises, the expansion piece is expanded in the vertical direction and moves away from each other in the horizontal direction, so that the multiple bumpers carried are separated from each other;

[0028] S4: with the continuous operation of the rail type conveyor, the first transmission wheel and the second transmission wheel are in contact with the swing rack and the deflection rack in turn, so that the bumper is swung in the horizontal direction and deflected in the vertical direction under the transmission of the swing shaft, the transmission worm, the worm gear and the deflection shaft;

[0029] S5: In the process of bumper swing and deflection, the machine vision detection module on the tunnel type detection table continuously performs machine vision identification on the bumper, thereby realizing dynamic detection of the bumper.

[0030] The beneficial effects of the present application are as follows:

[0031] 1. The bumper paint defect detection device and detection method, by setting the follow-up assembly, in the process of bumper transportation, through the meshing transmission of the first transmission wheel and the swing rack, the bumper swings in the horizontal direction during the detection process, through the swing operation, not only the curved surface at both ends of the bumper enters the detection range of the machine vision detection module, and through the shooting of the same position at different angles for many times, the detection efficiency of the bumper paint defect is further enhanced.

[0032] 2. The bumper paint defect detection device and detection method, by rotating the deflection shaft, the bumper rotates in the circumferential direction with the horizontal direction as the rotation axis, by adjusting the spacing, length and distribution rule of the deflection rack, the deflection angle and direction of the clamp can be effectively adjusted, and the bumper can change the angle in the vertical direction, further increasing the shooting angle range of the machine vision detection module to the bumper, and further improving the detection effect of the bumper paint defect. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be further described below in conjunction with the drawings.

[0034] Figure 1 is a perspective view of the present application;

[0035] Figure 2 is a perspective view of the follow-up mechanism in the present application;

[0036] Figure 3 is an assembly drawing of the frame body and the deflection rod;

[0037] Figure 4 is an assembly drawing of the telescopic part and the deflection shaft;

[0038] Figure 5 is Figure 4 is a local enlarged view of A in

[0039] Figure 6 is an assembly drawing of the clamp and the bumper;

[0040] Figure 7 is a schematic view of the limiting groove;

[0041] Figure 8 is a distribution schematic view of the swing rack and the deflection rack on the tunnel type detection table;

[0042] Figure 9 is a method flowchart of the present application;

[0043] In the figure: 1, track conveyor; 11, tunnel detection table; 2, support shaft; 21, swing shaft; 22, first transmission wheel; 23, swing rack; 24, deflection shaft; 25, worm gear; 26, transmission worm; 27, second transmission wheel; 28, deflection rack; 3, clamp; 31, top rod; 32, bottom rod; 33, cross-cut support; 34, mounting block; 4, limit block; 41, limit groove; 42, lifting rail; 43, bearing block; 44, slip ring; 5, first reset elastic member; 51, second reset elastic member; 6, deflection rod; 7, telescopic rod. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0045] As shown in Figures 1 to 8 , the bumper paint defect detection device of the present application comprises a track conveyor 1 and a tunnel detection table 11;

[0046] The track conveyor 1 is used for transporting bumpers;

[0047] The tunnel detection table 11 is located on the extended path of the track conveyor 1, and a machine vision detection module is installed on one side of the tunnel detection table 11, which is used for automatic detection of bumper paint defects;

[0048] It also includes a follow-up mechanism, the bumper is installed on the follow-up mechanism, and the follow-up mechanism is used to adjust the relative angle between the bumper and the tunnel detection table 11;

[0049] The follow-up mechanism comprises a support shaft 2, a hanger, a swing shaft 21 and a swing rack 23;

[0050] The support shaft 2 is fixedly installed on the track conveyor 1, the hanger is rotatably installed on the support shaft 2, and the bumper is detachably fixedly installed on the hanger;

[0051] The swing shaft 21 is vertically installed at the top end of the hanger, the first transmission wheel 22 is fixedly installed on the swing shaft 21, a plurality of swing racks 23 are fixedly installed in the tunnel detection table 11, and the plurality of swing racks 23 are located on both sides of the movement path of the first transmission wheel 22.

[0052] When the bumper is detected for paint surface defects, the machine vision detection function is adopted to detect the bumper by shooting, which can effectively improve the detection rate and accuracy, reduce the defect omission probability, and reduce the labor intensity of the workers; in the machine vision detection, in order to improve the shooting effect of the bumper with a certain curvature, the present application sets the follow-up mechanism, adjusts the relative angle between the bumper and the tunnel detection table 11 during the shooting and detection of the bumper on the tunnel detection table 11, and then makes the machine vision detection module installed on the tunnel detection table 11 shoot the bumper more comprehensively and clearly, and further enhances the detection effect of the bumper paint surface defects.

[0053] Specifically, the bumper is loaded on the hanger on the support shaft 2, and after the spraying and drying processes, it enters the paint surface detection process under the transportation of the track conveyor 1. During the continuous transportation, the first transmission wheel 22 on the swing shaft 21 gradually contacts the swing rack 23. Since the swing rack 23 is fixedly installed in the tunnel detection table 11, the relative movement between the first transmission wheel 22 and the swing rack 23 causes the first transmission wheel 22 to rotate, and then the swing shaft 21 rotates. Since the swing rack 23 has multiple segments and is located on both sides of the movement path of the first transmission wheel 22, at most one segment of the swing rack 23 is engaged with the first transmission wheel 22 at the same time. By adjusting the interval distance, length and distribution rule of the swing rack 23, the hanger can produce regular horizontal swinging during transportation. During the swinging of the hanger, the detection effect of the tunnel detection table 11 on the curved surfaces at both ends of the bumper is improved. At the same time, the angle between the bumper and the machine vision detection module on the tunnel detection table 11 changes during the swinging, and then the same position is shot at different angles for multiple times, thereby effectively improving the detection efficiency of the bumper paint surface defects.

[0054] The present application sets the follow-up assembly, which causes the bumper to swing in the horizontal direction during detection through the engagement and transmission of the first transmission wheel 22 and the swing rack 23. Through the swinging operation, not only the curved surfaces at both ends of the bumper enter the detection range of the machine vision detection module, but also the same position is shot at different angles for multiple times, thereby further improving the detection efficiency of the bumper paint surface defects.

[0055] The follow-up mechanism further comprises a deflection shaft 24, a worm gear 25, a transmission worm 26 and a deflection rack 28.

[0056] The hanger comprises a frame body and a clamp 3, the frame body is rotatably installed with horizontally arranged deflection shafts 24, the clamp 3 is fixedly installed on the deflection shafts 24, and the bumper is detachably fixedly installed on the clamp 3.

[0057] The deflection shaft 24 is fixedly installed with a worm gear 25, the frame body is rotationally installed with a transmission worm 26, the transmission worm 26 is in meshing connection with the worm gear 25, the transmission worm 26 is fixedly installed with a second transmission wheel 27, a plurality of deflection racks 28 are installed in the tunnel type detection table 11, and the deflection racks 28 are located on both sides of the movement path of the second transmission wheel 27.

[0058] In order to further increase the angle change range between the bumper and the machine vision detection module, in the process of transporting the bumper, the second transmission wheel 27 gradually meshes with the deflection rack 28 for transmission, thereby causing the transmission worm 26 installed on the frame body to rotate, and the transmission worm 26 and the worm gear 25 are in meshing state, so the rotation of the transmission worm 26 causes the worm gear 25 and the deflection shaft 24 to rotate, and the clamp 3 is fixedly installed on the deflection shaft 24, and the bumper is detachably fixedly installed on the clamp 3, so the rotation of the deflection shaft 24 causes the bumper to rotate in the circumferential direction with the horizontal direction as the rotation axis, and by adjusting the spacing, length and distribution law of the deflection rack 28, the deflection angle and deflection direction of the clamp 3 can be effectively adjusted, thereby enabling the bumper to change the angle in the vertical direction, further increasing the range of the shooting angle of the machine vision detection module to the bumper, and thereby improving the detection effect of the paint defects of the bumper. It should be noted that in the present application, since the swing rack 23 and the deflection rack 28 are staggered, the horizontal swinging and vertical deflection of the bumper can be performed simultaneously or separately. In actual application, the arrangement position and interval of the swing rack 23 and the deflection rack 28 on the transportation route can be adjusted to realize the adjustment of the time of horizontal swinging and vertical deflection of the bumper.

[0059] As a preferred embodiment of the present application, the support shaft 2 is fixedly installed with a limiting block 4, the frame body is provided with a limiting groove 41, the limiting block 4 is located in the limiting groove 41 in the initial state, the tunnel type detection table is fixedly installed with a lifting rail 42, the lifting rail 42 is an arc-shaped structure with high middle and low ends, the swing shaft 21 is fixedly installed with a bearing block 43 at the top end, and the lifting rail 42 is located on both sides of the movement path of the bearing block 43.

[0060] The bearing block 43 is sleeved with a sliding ring 44, and the bearing block 43 and the sliding ring 44 are connected through a rolling bearing.

[0061] In order to enhance the stability of the bumper during transportation, when the bumper does not enter the paint surface detection process, under the gravity of the bumper and the hanger itself, the hanger has a tendency to move downward along the support shaft 2 until the limiting block 4 enters the limiting groove 41 to support the hanger. At this time, under the combined action of the limiting block 4 and the limiting groove 41, the hanger and the support shaft 2 cannot rotate relative to each other. When the bumper enters the paint surface detection process, as the transportation continues, the swing shaft 21 gradually enters the gap of the lifting rail 42, causing the sliding ring 44 at the bottom of the bearing block 43 to contact the lifting rail 42. The lifting rail 42 is a structure with high middle and low ends, so as the hanger moves to the middle of the lifting rail 42, the swing shaft 21 is gradually lifted, causing the swing shaft 21 and the hanger to move upward, and then the limiting block 4 is separated from the limiting groove 41, so that the hanger can rotate. It should be noted that the sliding ring 44 and the bearing block 43 are connected by a rolling bearing, which is arranged to effectively reduce the friction between the sliding ring 44 and the bearing block 43, facilitating the rotation of the swing shaft 21.

[0062] As a preferred embodiment of the present application, the first reset elastic member 5 and the second reset elastic member 51 are fixedly installed on the frame body, and the first reset elastic member 5 and the second reset elastic member are respectively extended and fixed on the support shaft 2 and the deflection shaft 24.

[0063] In the present application, the first reset elastic member 5 and the second reset elastic member 51 are preferably one or a combination of elastic ropes and springs. As the relative movement between the hanger and the lifting rail 42 proceeds, when the hanger moves from the middle of the lifting rail 42 to the other end, the hanger gradually descends. At this time, the existence of the first reset elastic member 5 and the second reset elastic member 51 can restore the bumper and the hanger to the initial state, and facilitate the recombination of the limiting groove 41 and the limiting block 4.

[0064] As a preferred embodiment of the present application, the frame body includes a top rod 31, a bottom rod 32 and a telescopic member, the two ends of the telescopic member are respectively connected with the top rod 31 and the bottom rod 32, and the deflection shaft 24 is installed on the telescopic member.

[0065] The top rod 31, the bottom rod 32 and the telescopic piece are used to form the frame body, when the lifting rail 42 lifts the swing shaft 21 during transportation, the swing shaft 21 directly pulls the top rod 31 to rise, then the telescopic piece gradually expands, when the telescopic piece expands to the end, the bottom rod 32 is pulled to rise, finally the limiting groove 41 is separated from the limiting block 4, during the process, the expansion of the telescopic piece makes the distance between the clamps 3 and the bumpers arranged uniformly in the vertical direction increase, therefore, when the bumpers deflect in the vertical direction, the bumpers can effectively avoid collision, it should be known that the transmission worm 26 used in the application is a telescopic structure, in the embodiment, the transmission worm 26 is composed of transmission segments and telescopic segments, the transmission segments are all rotationally installed on the telescopic piece, the telescopic segments are fixedly installed between adjacent two transmission segments, the telescopic segments can not only transmit torque, but also can stretch and retract in the vertical direction.

[0066] As a preferred embodiment of the application, the telescopic piece is a combination of the cross-shearing support 33 and the mounting block 34, and the deflection shaft 24 is mounted on the mounting block 34.

[0067] The cross-shearing support 33 is used to fixedly install the mounting block 34 on the support, so that the distance between the mounting blocks 34 is finally the same during the stretching and retracting of the telescopic piece, and the distance between the bumpers in the vertical direction is finally the same.

[0068] As a preferred embodiment of the application, the top rod 31 and the bottom rod 32 are both hingedly mounted with the deflection rods 6, the deflection rods 6 are both divided into two groups, and the telescopic piece is hingedly connected with the two groups of deflection rods 6.

[0069] The deflection rods 6 are arranged to make the frame body stretch and retract in the vertical direction under the action of gravity, so that the deflection rods 6 are deflected, the distance between the bumpers on both sides of the hanger is increased during the detection process, and the convenience of the angle change of the bumper is further enhanced.

[0070] As a preferred embodiment of the application, the telescopic rods 7 are fixedly installed on adjacent two mounting blocks 34, the telescopic rods 7 are arranged in combination with the cross-shearing support 33 to enhance the limiting effect of the mounting blocks 34, so that the mounting blocks 34 can stably stretch and retract in the vertical direction following the cross-shearing support 33.

[0071] As shown in Figure 9 A bumper paint surface defect detection method, the detection method comprises the following steps:

[0072] S1: The bumper is mounted on the hanger and conveyed by the track type conveyor 1 along a pre-set route, after the spraying and drying processes, the bumper enters the paint surface defect detection process;

[0073] S2: With the continuous operation of the track conveyor 1, the load block 43 on the swing shaft 21 gradually moves to the lifting rail 42 and is in contact with the lifting rail 42 through the bottom sleeved sliding ring 44, and under the guidance of the lifting rail 42, the swing shaft 21 pulls the top rod 31 to rise;

[0074] S3: During the rising of the top rod 31, the deflection lever 6 is first deflected and then rises, pushing the telescopic part to expand in the vertical direction and move away from each other in the horizontal direction, so as to separate the multiple bumpers carried;

[0075] S4: With the continuous operation of the track conveyor 1, the first transmission wheel 22 and the second transmission wheel 27 are in contact with the swing rack 23 and the deflection rack 28 in turn, and then under the transmission of the swing shaft 21, the transmission worm 26, the worm gear 25 and the deflection shaft 24, the bumpers are caused to swing horizontally and deflect vertically;

[0076] S5: In the process of swinging and deflecting of the bumpers, the machine vision detection module on the tunnel type detection table 11 continuously performs machine vision identification on the bumpers, thereby realizing dynamic detection of the bumpers.

[0077] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A bumper paint surface defect detection device, comprising a track-type conveyor and a tunnel-type detection station; The track-type conveyor is used to transport the bumper; The tunnel-type detection station is located on the extended path of the track-type conveyor, and a machine vision detection module is installed on one side of the tunnel-type detection station, which is used for automatic detection of bumper paint surface defects; characterized in that It also includes a follow-up mechanism, the bumper is installed on the follow-up mechanism, and the follow-up mechanism is used to adjust the relative angle of the bumper and the tunnel-type detection station; The follow-up mechanism comprises a support shaft, a hanger, a swing shaft and a swing rack; The support shaft is fixedly installed on the track-type conveyor, the hanger is rotatably installed on the support shaft, and the bumper is detachably and fixedly installed on the hanger; The top end of the hanger is vertically installed with a swing shaft, the swing shaft is fixedly installed with a first transmission wheel, and the tunnel-type detection station is fixedly installed with a plurality of swing racks, which are located on both sides of the movement path of the first transmission wheel; The follow-up mechanism further comprises a deflection shaft, a worm gear, a transmission worm and a deflection rack; The hanger comprises a frame body and a clamp, the deflection shaft is rotatably installed on the frame body, the clamp is fixedly installed on the deflection shaft, and the bumper is detachably and fixedly installed on the clamp; The deflection shaft is fixedly installed with a worm gear, the frame body is rotatably installed with a transmission worm, the transmission worm and the worm gear are in meshing connection, the transmission worm is fixedly installed with a second transmission wheel, and the tunnel-type detection station is installed with a plurality of deflection racks, which are located on both sides of the movement path of the second transmission wheel; A limiting block is fixedly installed on the support shaft, a limiting groove is formed in the frame body, the limiting block is located in the limiting groove in the initial state, a lifting rail is fixedly installed on the tunnel-type detection station, the lifting rail has an arc-shaped structure with high middle and low ends, a bearing block is fixedly installed at the top end of the swing shaft, and the ends of the lifting rail are located on both sides of the movement path of the bearing block; A sliding ring is sleeved on the bearing block, and the bearing block and the sliding ring are connected through a rolling bearing; The frame body comprises a top rod, a bottom rod and an expansion piece, the expansion piece is connected with the top rod and the bottom rod at both ends, and the deflection shaft is installed on the expansion piece; A deflection rod is hingedly installed on the top rod and the bottom rod, and the deflection rod is divided into two groups, and the expansion piece and the two groups of deflection rods are hingedly connected.

2. A bumper paint defect detection apparatus according to claim 1, wherein: A first reset elastic member and a second reset elastic member are fixedly installed on the frame body, and the first reset elastic member and the second reset elastic member are respectively extended and fixed on the support shaft and the deflection shaft.

3. A bumper fascia defect detection apparatus as defined in claim 2, wherein: The expansion piece is a combination of a cross-cut support and a mounting block, and the deflection shaft is installed on the mounting block.

4. A bumper paint defect detection apparatus according to claim 3, wherein: A telescopic rod is fixedly installed on the adjacent two mounting blocks.

5. A method of bumper paint defect detection, characterized by: The method uses the bumper paint surface defect detection device of claim 4, and the detection method comprises the following steps: S1: The bumper is installed on the hanger and transported by the track-type conveyor along the pre-set route, and after the spraying and drying processes, it enters the paint surface defect detection process; S2: With the continuous operation of the track conveyor, the load blocks on the swing shaft gradually move to the lifting rail and contact the lifting rail through the bottom sleeve sliding ring. Under the guidance of the lifting rail, the swing shaft pulls the top rod up; S3: During the lifting of the top rod, the deflection rod is first deflected and then lifted, pushing the telescopic part to expand vertically and move away from each other horizontally, thereby separating the multiple bumpers carried; S4: With the continuous operation of the track conveyor, the first transmission wheel and the second transmission wheel are in contact with the swing rack and the deflection rack in turn, and then under the transmission of the swing shaft, the transmission worm, the worm gear and the deflection shaft, the bumper is caused to swing horizontally and deflect vertically; S5: In the process of swinging and deflecting of the bumper, the machine vision detection module on the tunnel type detection table continuously performs machine vision identification on the bumper, thereby realizing dynamic detection of the bumper.

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