Automatic positioning visual inspection device and method thereof

Abstract

The invention relates to the technical field of visual inspection, and discloses an automatically positioned visual inspection device and a method thereof, comprising a conveying crawler, and a detection box installed on the upper side of the conveying crawler, and a detection camera installed on the inner wall of the detection box for detecting a mobile phone shell, wherein an adsorption device for adsorbing the mobile phone shell is installed inside the detection box, a placement seat for fixing the mobile phone shell is installed on the upper side of the conveying crawler, a first lighting for supplementing light to the mobile phone shell is installed on the inner wall of the detection box, a flip plate for flipping the mobile phone shell is installed inside the detection box, the adsorption device is installed on the surface of the flip plate, and a driving motor for adjusting the flip plate is installed on the outer side of the detection box, and a first camera can provide a better image capture resolution and visual information through the viewing angle facing the upper side of the mobile phone shell, which is helpful for accurately detecting the details of the mobile phone shell; the placement plate limits the mobile phone shell, which helps the mobile phone shell not to shift during movement, thereby improving the second camera to capture defects on the surface of the mobile phone shell.

Description

Technical Field

[0001] The present invention relates to the technical field of visual inspection, and in particular to an automatic positioning visual inspection device and a method thereof. Background Art

[0002] Automatic positioning visual inspection refers to the process of automatically identifying and locating target objects or specific locations using visual technology. This technology can accurately find the location or characteristics of target objects through cameras and image processing algorithms. It is widely used in industrial production, robot navigation, security monitoring and other fields to achieve automated and accurate positioning and detection tasks.

[0003] Most mobile phone cases that leave the factory need to be quality inspected during factory production. The inspection method is through visual inspection. Industrial cameras are usually used for visual inspection because they have high resolution, high speed and stability and can capture high-quality images for analysis and inspection.

[0004] At present, in the process of inspecting mobile phone cases by industrial cameras, operators often place the mobile phone cases directly on the surface of the conveyor belt, resulting in inaccurate placement of the mobile phone cases. When the mobile phone cases reach the bottom side of the industrial camera, the deviation of the mobile phone cases may cause the industrial camera to be unable to inspect specific parts of the mobile phone cases, resulting in incomplete inspection and possible ignoring of defects. Therefore, it does not meet the existing needs. We propose an automatic positioning visual inspection device and method for this purpose. Summary of the invention

[0005] The present invention provides an automatic positioning visual inspection device and method thereof, which have the beneficial effect of being able to inspect mobile phone cases from all directions, and solves the problem mentioned in the above background technology that in the process of inspecting mobile phone cases by industrial cameras, operators often place the mobile phone cases directly on the surface of a conveyor belt, resulting in inaccurate placement of the mobile phone cases. When the mobile phone case reaches the bottom side of the industrial camera, the deviation of the mobile phone case may cause the industrial camera to be unable to inspect specific parts of the mobile phone case, resulting in incomplete inspection and the possibility of ignoring defects.

[0006] The present invention provides the following technical solution: an automatically positioned visual inspection device, comprising a conveyor belt, and an inspection box installed on the upper side of the conveyor belt, and an inspection camera installed on the inner wall of the inspection box for inspecting mobile phone cases, an adsorption device for adsorbing mobile phone cases is installed inside the inspection box, a placement seat for fixing mobile phone cases is installed on the upper side of the conveyor belt, a first light for supplementary lighting for mobile phone cases is installed on the inner wall of the inspection box, a flip plate for flipping mobile phone cases is installed inside the inspection box, the adsorption device is installed on the surface of the flip plate, and a drive motor for adjusting the flip plate is installed on the outer side of the inspection box.

[0007] As an optional solution of the automatic positioning visual inspection equipment described in the present invention, wherein: the placement seat includes a plurality of fixed plates installed on the surface of the conveying track, and a first spring symmetrically installed on the upper side of the fixed plate, and a placement plate installed on the upper side of the first spring for placing a mobile phone case, and the detection camera includes a first camera installed on the inner wall of the detection box, and a second camera movably installed on the inner wall of the detection box.

[0008] As an optional solution of the automatic positioning visual inspection equipment described in the present invention, wherein: a rotating column is rotatably installed on the inner wall of the inspection box, a rotating plate is installed on the side of the rotating column, a support frame is installed inside the inspection box, a first telescopic rod is movably installed inside the support frame, a first flip rod is rotatably installed inside the support frame, and the first telescopic rod and the first flip rod are connected to the flip plate.

[0009] As an optional solution of the automatic positioning visual inspection equipment described in the present invention, wherein: a first track groove for driving the first telescopic rod to extend and retract is installed on the surface of the rotating column, a first sliding column is installed on the end of the first telescopic rod, and the first sliding column is slidably matched with the first track groove, and a second track groove for controlling the rotation of the flip plate is opened on the surface of the rotating plate, a connecting block is installed on the end of the first flip rod, a second sliding column is installed on the end of the connecting block, and the second sliding column is slidably matched with the second track.

[0010] As an optional solution of the automatic positioning visual inspection equipment described in the present invention, wherein: a second flip rod is movably installed inside the first flip rod, the flip plate is installed at the end of the second flip rod, a connecting plate for telescopic operation of the second flip rod is installed at the end of the first telescopic rod, and the second flip rod is rotatably matched with the connecting plate.

[0011] As an optional solution of the automatic positioning visual inspection equipment described in the present invention, wherein: a connecting seat is installed on the bottom side of the inspection box, a flip disk for flipping the second camera is movably installed on the bottom side of the connecting seat, a third track groove for adjusting the flipping direction of the flip disk is symmetrically opened on the side wall of the connecting seat, a sliding groove is opened inside the connecting seat, a pushing block is slidably installed inside the sliding groove, a connecting rod is symmetrically installed on the side of the pushing block, a sliding seat is symmetrically installed on the bottom side of the flip disk, a connecting groove for rotationally cooperating with the connecting rod is opened on the side of the sliding seat, and a support column slidably cooperating with the third track groove is installed on the side of the sliding seat.

[0012] As an optional solution of the automatic positioning visual inspection equipment described in the present invention, wherein: a support platform is installed on the bottom side of the connecting seat, a driving rod is movably inserted inside the support platform, the driving rod is connected to the side of the pushing block, a pulley group is installed inside the inspection box, the active end of the pulley group cooperates with the rotating shaft of the driving motor to rotate, a connecting shaft is installed on the side of the driven end of the pulley group, a cam is installed on the end of the connecting shaft, a first push rod is movably installed on the side of the cam, and the first push rod is hinged to the driving rod.

[0013] As an optional solution for the automatic positioning visual inspection equipment described in the present invention, the side of the pushing block is provided with a tooth segment, the bottom side of the connecting seat is rotatably mounted with a bevel gear, the bevel gear is meshed with the tooth segment, the side of the connecting seat is provided with a support plate for supporting the bevel gear, the bottom side of the connecting seat is provided with a DC motor, and the rotating shaft of the DC motor is connected with the bevel gear.

[0014] As an optional solution of the automatic positioning visual inspection equipment described in the present invention, a second lamp is installed on the surface of the flip disk, the second lamp is electrically connected to the DC motor through a wire, and a compensation mirror is installed on the surface of the flip disk for supplementing light for the mobile phone case, and the compensation mirror corresponds to the light source of the first lamp after the flip disk rotates.

[0015] This solution also proposes an optional solution for an automatic positioning visual inspection method, which includes the following steps:

[0016] S1. Place the phone case on the surface of the stand;

[0017] S2. The placement seat follows the conveyor belt to the bottom side of the first camera, and the first light is used to illuminate the surface of the mobile phone shell to enhance the detection resolution of the mobile phone shell by the first camera;

[0018] S3. The mobile phone case is flipped by the cooperation of the flip plate and the adsorption device, so that the second camera detects the bottom side of the mobile phone case;

[0019] S4. After the mobile phone fails the inspection, it is removed by the operator.

[0020] The present invention has the following beneficial effects:

[0021] 1. The automatic positioning visual inspection device and method thereof, by placing a mobile phone case on the surface of a placement plate, the placement plate can limit the position of the mobile phone case. When the fixed plate moves following the conveyor track, the placement plate reaches the bottom side of the first camera. At this time, the shooting point of the first camera is located directly above the surface of the mobile phone case. The first camera can clearly shoot the mobile phone case from above the surface of the mobile phone case. Through the perspective of the first camera facing the upper side of the mobile phone case, it can provide better image capture resolution and visual information, which is helpful to accurately detect the details and features of the mobile phone case; through the placement plate limiting the position of the mobile phone case, the mobile phone case is not easily shifted during the movement, the second camera is improved to capture the defects on the surface of the mobile phone case, and the position of the mobile phone case is locked more accurately.

[0022] 2. The automatic positioning visual inspection device and method thereof realizes the simultaneous retraction and retraction of the reversing plate by rotating the rotating column and the rotating plate, and utilizing the cooperation between the first track groove and the first sliding column, and the cooperation between the second track groove and the first reversing rod. The adsorption device 111 is installed on the bottom side of the reversing plate, and when the reversing plate is retracted to the upper side of the mobile phone case, it is adsorbed. During the reversal of the reversing plate, the bottom side of the mobile phone case is simultaneously reversed, so that the detection camera detects the bottom side of the mobile phone case, thereby realizing comprehensive detection.

[0023] While the flip plate is flipping, the flip disk utilizes the transmission of the pulley group, the first push rod and the driving rod to realize the flipping of the flip disk by the push block during the sliding process, and the flip plate and the flip disk appear in the process of rotating respectively, and the flip plate and the flip disk are parallel and opposite. Therefore, the second camera installed on the surface of the flip disk can intuitively detect the bottom side of the mobile phone case. Since the viewing angle of the second camera is parallel and opposite to the mobile phone case, the detection effect of the bottom side of the mobile phone case is further enhanced, and the second camera is more intuitive in capturing the surface features and details of the mobile phone case, while reducing the possibility of viewing angle distortion or deformation. Secondly, through the parallel and opposite viewing angle positioning mode, the detection camera can accurately measure the size and geometric features of the mobile phone case, which is helpful for quality control and evaluation of the consistency of the mobile phone case.

[0024] 3. The automatic positioning visual inspection equipment and method thereof, the pushing block slides driven by the first pushing rod and the driving rod, during the sliding process of the pushing block, the tooth segment meshes with the bevel gear, the bevel gear is connected to the rotating shaft of the DC motor, and while the bevel gear rotates, the DC motor generates electricity by itself, so that the second light is electrically connected to the DC motor by a wire, and when the flip plate is rotating, the second light emits light and directly illuminates the surface of the mobile phone case, so as to avoid the problem of uneven lighting affecting the detection of the mobile phone case due to the tilt of the mobile phone case as much as possible; due to the installation of the compensating mirror, when the flip plate rotates, the light source of the first light can be refracted on the surface of the mobile phone case through the compensating mirror, so as to further maintain the consistency and accuracy of the lighting, thereby improving the performance of the detection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the half-section structure of the detection box of the present invention.

[0027] Figure 3 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0028] Figure 4 It is a schematic diagram of the linkage cooperation structure between the rotating column and the connecting seat of the present invention.

[0029] Figure 5 It is a schematic diagram of the parts matching structure between the flip plate and the flip disk of the present invention.

[0030] Figure 6 It is a schematic diagram of the coordination structure of the rotating column, the rotating plate, the first telescopic rod and the first flip rod of the present invention.

[0031] Figure 7 Schematic diagram of the structure of the first track groove at different angles of the present invention.

[0032] Figure 8 It is a structural schematic diagram of the turning process of the turning disk of the present invention.

[0033] Fig. 9 It is a schematic diagram of the exploded structure of the parts between the turning plate and the connecting seat of the present invention.

[0034] Fig.10 It is a schematic diagram of the matching structure of the DC motor and the bevel gear of the present invention.

[0035] Fig.11 It is a schematic diagram of the first telescopic rod and the second flip rod of the present invention being extended.

[0036] In the figure: 110, conveyor crawler; 111, adsorption device; 112, drive motor; 113, first camera; 114, second camera; 120, detection box; 130, detection camera; 131, first light; 140, flip plate; 150, placement seat; 151, first spring; 152, placement plate; 153, fixed plate; 160, rotating column; 161, first track groove; 170, rotating plate; 171, second track groove; 180, support frame; 181, first telescopic rod; 182, first flip rod; 183, first sliding column; 184, connecting block; 185, second Sliding column; 190, second flip rod; 191, connecting plate; 210, connecting seat; 211, flip disk; 212, third track groove; 213, sliding groove; 214, pushing block; 215, connecting rod; 220, sliding seat; 221, supporting column; 222, connecting groove; 230, supporting platform; 231, driving rod; 232, pulley group; 233, connecting shaft; 234, cam; 235, first push rod; 240, tooth segment; 241, bevel gear; 242, supporting plate; 243, DC motor; 250, second light; 251, compensation mirror; 260, supporting rod. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1: This embodiment aims to solve the problem that during the process of detecting the mobile phone case by the industrial camera, the operator often places the mobile phone case directly on the surface of the conveyor belt, resulting in inaccurate placement of the mobile phone case. When the mobile phone case reaches the bottom side of the industrial camera, the deviation of the mobile phone case may cause the industrial camera to be unable to detect specific parts of the mobile phone case, resulting in incomplete detection and possible ignoring of defects. Please refer to Figure 1-Figure 11 , an automatic positioning visual inspection device and method thereof, comprising a conveyor belt 110, and a detection box 120 installed on the upper side of the conveyor belt 110, and a detection camera 130 installed on the inner wall of the detection box 120 for detecting a mobile phone shell, an adsorption device 111 for adsorbing the mobile phone shell is installed inside the detection box 120, a placement seat 150 for fixing the mobile phone shell is installed on the upper side of the conveyor belt 110, and a first illumination lamp 131 for supplementing light to the mobile phone shell is installed on the inner wall of the detection box 120. The detection camera 130 is a common device, so it is not explained in this embodiment.

[0039] The adsorption device 111 in this embodiment is used to adsorb the mobile phone case. Usually, the adsorption device 111 includes a suction cup and an air pump. The suction cup and the air pump are a common matching device and are well known to ordinary technicians in this field. Therefore, they will not be described in detail in this embodiment.

[0040] See Figure 1 , Figure 2 , Figure 3 and Fig.10 The placement seat 150 includes a plurality of fixed plates 153 installed on the surface of the conveying belt 110, and a first spring 151 symmetrically installed on the upper side of the fixed plate 153, and a placement plate 152 installed on the upper side of the first spring 151 for placing the mobile phone case, so that there can be a certain distance between the mobile phone case and the conveying belt 110, and the placement plate 152 can adaptively move up and down when being squeezed. Through the setting of the first spring 151, the product on the surface of the placement plate 152 can contact with the adsorption device 111. A support rod 260 is installed on the side of the fixed plate 153, and the placement plate 152 is slidably matched with the support rod 260. The detection camera 130 includes a first camera 113 installed on the inner wall of the detection box 120, and a second camera 114 movably installed on the inner wall of the detection box 120.

[0041] During the specific implementation, the operator manually places the mobile phone case on the surface of the placement plate 152, so that the mobile phone case is locked inside the placement plate 152 and is not easily displaced. The fixed plate 153 follows the conveyor belt 110 to move and reaches the bottom side of the first camera 113. The first camera 113 detects the mobile phone case on the surface of the placement plate 152. By locking the mobile phone case on the surface of the placement plate 152, the mobile phone case is not easily displaced during the movement, which can help the second camera 114 to lock the position of the mobile phone case more accurately, effectively reducing the impact of the displacement of the mobile phone case on the detection result, thereby improving the efficiency and accuracy of the detection.

[0042] In this embodiment: by placing the mobile phone case on the surface of the placement plate 152, the placement plate 152 can limit the mobile phone case. When the fixed plate 153 moves following the conveyor belt 110, the placement plate 152 reaches the bottom side of the first camera 113. At this time, the shooting point of the first camera 113 is located directly above the surface of the mobile phone case. The first camera 113 can clearly capture the mobile phone case from above the surface of the mobile phone case. Through the perspective of the first camera 113 facing the upper side of the mobile phone case, it can provide better image resolution and visual information, which is helpful to accurately detect the details and features of the mobile phone case; by limiting the mobile phone case by the placement plate 152, the mobile phone case is not easily displaced during the movement, the second camera 114 is improved to capture the defects on the surface of the mobile phone case, and the position of the mobile phone case is locked more accurately.

[0043] Embodiment 2: This embodiment is intended to solve the problem that during the detection of mobile phone cases, since the operator directly places the mobile phone cases on the surface of the conveyor belt, most of the detection can only be performed on the surface and sides of the mobile phone cases, and the bottom side of the mobile phone cases can rarely be detected, resulting in incomplete detection. This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figure 1-Figure 11 A flip plate 140 for flipping the mobile phone case is installed inside the detection box 120, and an adsorption device 111 is installed on the surface of the flip plate 140. A driving motor 112 for adjusting the flip plate 140 is installed on the outside of the detection box 120. A rotating column 160 is rotatably installed on the inner wall of the detection box 120, and a rotating plate 170 is installed on the side of the rotating column 160. The driving motor 112 drives the rotating column 160 and the rotating plate 170 to rotate together. A support frame 180 is installed inside the detection box 120, and a first telescopic rod 181 is movably installed inside the support frame 180. A first flip rod 182 is rotatably installed inside the support frame 180. The first telescopic rod 181 and the first flip rod 182 are connected to the flip plate 140, and the support frame 180 supports the first telescopic rod 181 and the first flip rod 182.

[0044] A first track groove 161 for driving the first telescopic rod 181 to extend and retract is installed on the surface of the rotating column 160, a first sliding column 183 is installed on the end of the first telescopic rod 181, and the first sliding column 183 is slidably matched with the first track groove 161, a second track groove 171 for controlling the rotation of the flip plate 140 is opened on the surface of the rotating plate 170, a connecting block 184 is installed on the end of the first flip rod 182, a second sliding column 185 is installed on the end of the connecting block 184, and the second sliding column 185 is slidably matched with the second track groove 171.

[0045] See Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig.11 In a specific implementation, the rotation of the rotating column 160 and the rotating plate 170 is improved, and the first telescopic rod 181 slides inside the first track groove 161 using the first sliding column 183, so that the first telescopic rod 181 can reciprocate on the side of the rotating column, and the first flipping rod 182 cooperates with the second track groove 171 through the connecting block 184 and the second sliding column 185 to realize the flipping movement of the first flipping rod 182 in front of the rotating plate.

[0046] See Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig.11In a specific implementation, the second flip rod 190 is movably installed inside the first flip rod 182, so that the second flip rod 190 rotates in the same direction as the first flip rod 182 flips, and the flip plate 140 is installed at the end of the second flip rod 190, so that the first flip rod 182 flips and the flip plate 140 is flipped at the same time, and a connecting plate 191 for the extension and retraction of the second flip rod 190 is installed at the end of the first telescopic rod 181. When the first telescopic rod 181 reciprocates, the second flip rod 190 reciprocates while flipping by virtue of the cooperation of the connecting plate 191, and the flip plate 140 flips while reciprocating, and the second flip rod 190 rotates and cooperates with the connecting plate 191.

[0047] During specific implementation, by rotating the rotating column 160 and the rotating plate 170, utilizing the cooperation between the first track groove 161 and the first sliding column 183, and the cooperation between the second track groove 171 and the first flip rod 182, the simultaneous extension and retraction of the flip plate 140 is achieved; when the surface of the mobile phone case is detected, the flip plate 140 is located on the upper side of the mobile phone case during the extension and retraction process, and at the same time, the flip plate 140 fixes the mobile phone case on its bottom side using the adsorption device 111. After fixing the mobile phone case, the flip plate 140 drives the mobile phone case to flip, so that the bottom side of the mobile phone case is flipped, and the bottom side of the mobile phone case is captured and detected by the detection camera 130, thereby improving the accuracy of the detection.

[0048] See Figure 8 , Fig. 9 and Fig.10 A connecting seat 210 is installed on the bottom side of the detection box 120, and a flip disk 211 for flipping the second camera 114 is movably installed on the bottom side of the connecting seat 210. A third track groove 212 for adjusting the flipping direction of the flip disk 211 is symmetrically opened on the side wall of the connecting seat 210. A sliding groove 213 is opened inside the connecting seat 210, and a pushing block 214 is slidably installed inside the sliding groove 213. A connecting rod 215 is symmetrically installed on the side of the pushing block 214. A sliding seat 220 is symmetrically installed on the bottom side of the flip disk 211. A connecting groove 222 for rotationally cooperating with the connecting rod 215 is opened on the side of the sliding seat 220, and a support column 221 for slidingly cooperating with the third track groove 212 is installed on the side of the sliding seat 220.

[0049] See Figure 4 , Figure 8 , Fig. 9 and Fig.10A support platform 230 is installed on the bottom side of the connecting seat 210, and a driving rod 231 is movably installed inside the support platform 230, and the driving rod 231 is connected to the side of the pushing block 214. A pulley group 232 is installed inside the detection box 120, and the active end of the pulley group 232 cooperates with the rotating shaft of the driving motor 112 to rotate, and a connecting shaft 233 is installed on the side of the driven end of the pulley group 232, and a cam 234 is installed on the end of the connecting shaft 233. A first push rod 235 is movably installed on the side of the cam 234, and the first push rod 235 is hinged to the driving rod 231.

[0050] See Figure 4 , Figure 8 , Fig. 9 and Fig.10 In a specific implementation, when the driving motor 112 drives the connecting shaft to rotate through the pulley set 232, the cam 234 installed at the end of the connecting shaft is driven to rotate. During the rotation of the cam 234, the first push rod 235 and the driving rod 231 are used to drive the pushing block 214 to slide from one end of the sliding groove 213 to the other end. While the pushing block 214 slides, the cooperation of the sliding seat 220 is used to move the flip plate 211. At the same time, the support columns 221 on both sides of the flip plate 211 are used to slide with the third track groove 212 to achieve the flipping of the flip plate 211 while moving, so that the second camera 114 rotates in the same direction as the flip plate 211, so that the second camera 114 can perform multi-directional position detection on the mobile phone case, thereby improving the comprehensiveness of the detection.

[0051] In specific implementation, after the flip plate 140 adsorbs the mobile phone case through the adsorption device, the flip plate 140 rotates by using the cooperation of the first flip rod 182 and the second track groove 171, and the flip disk 211 rotates by using the cooperation of the third track groove and the push block 214. During the rotation, the flip plate 140 and the flip disk 211 appear parallel and opposite to each other. Therefore, the second camera 114 installed on the surface of the flip disk 211 can intuitively detect the bottom side of the mobile phone case. During the rotation of the flip disk 211 and the flip plate 140 respectively, the flip disk 211 and the flip plate 140 will have the same inclination angle. Therefore, the viewing angle of the second camera 114 is parallel to the mobile phone case, and when the second camera 114 is parallel to the mobile phone case, the second camera 114 captures the bottom side of the mobile phone case, so that the second camera 114 can more intuitively capture the bottom side features and details of the mobile phone case.

[0052] In this embodiment: by rotating the rotating column 160 and the rotating plate 170, the first track groove 161 cooperates with the first sliding column 183, and the second track groove 171 cooperates with the first flip rod 182, so that the flip plate 140 can be flipped while being extended and retracted. The adsorption device 111 is installed on the bottom side of the flip plate 140, and the flip plate 140 is adsorbed when it is extended to the upper side of the mobile phone shell. During the flipping process of the flip plate 140, the bottom side of the mobile phone shell is flipped at the same time, so that the detection camera 130 detects the bottom side of the mobile phone shell, thereby achieving comprehensive detection;

[0053] When the flip plate 140 flips, the flip disk 211 utilizes the transmission of the pulley set 232, the first push rod 235 and the driving rod 231 to realize that the push block 214 flips the flip disk 211 during the sliding process. The flip plate 140 and the flip disk 211 rotate respectively, and the flip plate 140 and the flip disk 211 are parallel and opposite. Therefore, the second camera 114 installed on the surface of the flip disk 211 can intuitively detect the bottom side of the mobile phone case. Since the viewing angle of the second camera 114 is parallel and opposite to the mobile phone case, the detection effect of the bottom side of the mobile phone case is further enhanced, and the second camera 114 is improved. Capturing the surface features and details of the mobile phone case intuitively and reducing the possibility of perspective distortion or deformation. Secondly, through the position mode of parallel and opposite viewing angles, the detection camera 130 can accurately measure the size and geometric features of the mobile phone case, which is helpful for quality control and evaluation of the consistency of the mobile phone case.

[0054] Embodiment 3: This embodiment is intended to solve the problem that during the flipping of the mobile phone case, due to the tilt of the angle, the light source cannot directly illuminate the surface of the mobile phone case, resulting in uneven lighting, causing some parts to be too bright or too dark, affecting the detection accuracy. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1-Figure 11 A tooth segment 240 is provided on the side of the push block 214, a bevel gear 241 is rotatably installed on the bottom side of the connecting seat 210, the bevel gear 241 is engaged with the tooth segment 240, a support plate 242 for supporting the bevel gear 241 is installed on the side of the connecting seat 210, a DC motor 243 is installed on the bottom side of the connecting seat 210, and the rotating shaft of the DC motor 243 is connected to the bevel gear 241, and a second light 250 is installed on the surface of the flip plate 211, and the second light 250 is electrically connected to the DC motor 243 through a wire.

[0055] The DC motor 243 is a common device. Usually, when the DC motor 243 is driven to rotate by an external force or inertia through the motor shaft, the motor winding induces an electromotive force in the magnetic field to generate electricity. Generally, the DC motor 243 uses the principle of electromagnetic induction to generate an electromotive force and output electrical energy when rotating without the need for external direct power input. The self-excited generator usually includes an excitation coil, which self-excites through the electromotive force generated by rotation, thereby generating continuous electrical energy output. The principle of mechanical power generation by the DC motor 243 is common and well known to people in this field, so this embodiment will not be described in detail.

[0056] See Figure 8 , Fig. 9 and Fig.10 In a specific implementation, the push block 214 slides under the drive of the first push rod 235 and the driving rod 231. During the sliding process of the push block 214, the tooth segment 240 meshes with the bevel gear 241, so that the DC motor 243 is rotated to generate electricity during the rotation of the bevel gear 241. The second light 250 is electrically connected to the DC motor 243 by a wire, so that during the rotation of the flip disk 211, the second light 250 emits light and illuminates the surface of the mobile phone case, thereby avoiding the problem of uneven lighting due to the tilt of the mobile phone case affecting the detection as much as possible.

[0057] See Figure 8 , Fig. 9 and Fig.10 In a specific implementation, a compensation mirror 251 for supplementing light to the mobile phone case is installed on the surface of the flip disk 211. The compensation mirror 251 corresponds to the light source of the first lamp 131 after the flip disk 211 rotates. The installation of the compensation mirror 251 ensures that when the flip disk 211 rotates, the light source of the first lamp 131 can be refracted onto the surface of the mobile phone case through the compensation mirror, which helps to maintain the consistency and accuracy of the lighting, thereby improving the performance of the detection system.

[0058] This embodiment also provides an automatic positioning visual detection method, comprising the following steps:

[0059] S1. Place the mobile phone case on the surface of the placement seat 150;

[0060] S2. The placement seat 150 follows the conveyor belt 110 to the bottom side of the first camera 113, and at the same time, the first light 131 is used to illuminate the surface of the mobile phone shell to enhance the detection resolution of the first camera 113 for the mobile phone shell;

[0061] S3. The mobile phone case is flipped by the cooperation of the flip plate 140 and the adsorption device 111, so that the second camera 114 detects the bottom side of the mobile phone case;

[0062] S4. After the mobile phone fails the inspection, it is removed by the operator.

[0063] In this embodiment: the push block 214 slides under the drive of the first push rod 235 and the driving rod 231. During the sliding process of the push block 214, the tooth segment 240 meshes with the bevel gear 241, and the bevel gear 241 is connected to the rotating shaft of the DC motor 243. While the bevel gear 241 rotates, the DC motor 243 generates electricity by itself, so that the second light 250 is electrically connected to the DC motor 243 using a wire. When the flip plate 211 is rotating, the second light 250 emits light and directly illuminates the surface of the mobile phone case, thereby avoiding the problem of uneven lighting affecting the detection of the mobile phone case due to the tilt of the mobile phone case as much as possible; due to the installation of the compensation mirror 251, when the flip plate 211 rotates, the light source of the first light 131 can be refracted on the surface of the mobile phone case through the compensation mirror 251, which helps to maintain the consistency and accuracy of the lighting, thereby improving the performance of the detection system.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic positioning visual inspection device, comprising a conveyor belt (110), a detection box (120) installed on the upper side of the conveyor belt (110), and a detection camera (130) installed on the inner wall of the detection box (120) for inspecting a mobile phone case, characterized in that: The detection box (120) is internally installed with an adsorption device (111) for adsorbing the mobile phone shell, the upper side of the conveyor track (110) is installed with a placement seat (150) for fixing the mobile phone shell, the inner wall of the detection box (120) is installed with a first illumination lamp (131) for supplementing light to the mobile phone shell, the detection box (120) is internally installed with a flip plate (140) for flipping the mobile phone shell, the adsorption device (111) is installed on the surface of the flip plate (140), and the outer side of the detection box (120) is installed with a device for adjusting the flip plate (140). 0) of the driving motor (112); the placement seat (150) comprises a plurality of fixing plates (153) mounted on the surface of the conveying crawler (110), and a first spring (151) symmetrically mounted on the upper side of the fixing plates (153), and a placement plate (152) mounted on the upper side of the first spring (151) for placing a mobile phone case, the detection camera (130) comprises a first camera (113) mounted on the inner wall of the detection box (120), and a second camera (114) movably mounted on the inner wall of the detection box (120); A connecting seat (210) is installed on the bottom side of the detection box (120); a flip plate (211) for flipping the second camera (114) is movably installed on the bottom side of the connecting seat (210); a third track groove (212) for adjusting the flipping direction of the flip plate (211) is symmetrically provided on the side wall of the connecting seat (210); a sliding groove (213) is provided inside the connecting seat (210); a pushing block (214) is slidably installed inside the sliding groove (213); a connecting rod (215) is symmetrically installed on the side of the pushing block (214); a sliding seat (220) is symmetrically installed on the bottom side of the flip plate (211); a connecting groove (222) for rotationally cooperating with the connecting rod (215) is provided on the side of the sliding seat (220); and a supporting column (221) for slidably cooperating with the third track groove (212) is installed on the side of the sliding seat (220); A support platform (230) is installed at the bottom side of the connecting seat (210), a driving rod (231) is movably inserted into the support platform (230), the driving rod (231) is connected to the side of the pushing block (214), a pulley group (232) is installed inside the detection box (120), the active end of the pulley group (232) rotates in cooperation with the rotating shaft of the driving motor (112), a connecting shaft (233) is installed on the side of the driven end of the pulley group (232), a cam (234) is installed at the end of the connecting shaft (233), a first push rod (235) is movably installed on the side of the cam (234), and the first push rod (235) is hinged to the driving rod (231); A DC motor (243) is installed on the bottom side of the connection base (210); a second light (250) is installed on the surface of the flip plate (211); the second light (250) is electrically connected to the DC motor (243) via a wire; a compensation mirror (251) for supplementing light for the mobile phone case is installed on the surface of the flip plate (211); the compensation mirror (251) corresponds to the light source of the first light (131) after the flip plate (211) rotates.

2. The automatic positioning visual inspection device according to claim 1, characterized in that: A rotating column (160) is rotatably mounted on the inner wall of the detection box (120), a rotating plate (170) is mounted on the side of the rotating column (160), a support frame (180) is mounted inside the detection box (120), a first telescopic rod (181) is movably mounted inside the support frame (180), a first flipping rod (182) is rotatably mounted inside the support frame (180), and the first telescopic rod (181) and the first flipping rod (182) are connected to the flipping plate (140); A tooth segment (240) is provided on the side of the pushing block (214); a bevel gear (241) is rotatably mounted on the bottom of the connecting seat (210); the bevel gear (241) is meshed with the tooth segment (240); a support plate (242) for supporting the bevel gear (241) is mounted on the side of the connecting seat (210); and a rotating shaft of the DC motor (243) is connected to the bevel gear (241).

3. The automatic positioning visual inspection device according to claim 2, characterized in that: A first track groove (161) for driving the first telescopic rod (181) to extend and retract is installed on the surface of the rotating column (160); a first sliding column (183) is installed at the end of the first telescopic rod (181); the first sliding column (183) is slidably matched with the first track groove (161); a second track groove (171) for controlling the rotation of the flip plate (140) is opened on the surface of the rotating plate (170); a connecting block (184) is installed at the end of the first flip rod (182); a second sliding column (185) is installed at the end of the connecting block (184); the second sliding column (185) is slidably matched with the second track groove.

4. The automatic positioning visual inspection device according to claim 3, characterized in that: A second flip rod (190) is movably mounted inside the first flip rod (182); the flip plate (140) is mounted at the end of the second flip rod (190); a connecting plate (191) for telescoping the second flip rod (190) is mounted at the end of the first telescopic rod (181); the second flip rod (190) is rotatably matched with the connecting plate (191).

5. A visual inspection method using automatic positioning of the device as claimed in any one of claims 1 to 4, characterized in that: The steps include: S1. Place the mobile phone case on the surface of the placement seat (150); S2. The placement seat (150) follows the conveyor belt (110) to the bottom side of the first camera (113), and at the same time uses the first light (131) to illuminate the surface of the mobile phone shell, thereby enhancing the detection resolution of the mobile phone shell by the first camera (113); S3. The mobile phone case is flipped over by the cooperation of the flip plate (140) and the adsorption device (111), so that the second camera (114) detects the bottom side of the mobile phone case; S4. After the mobile phone fails the inspection, it is removed by the operator.

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