A component appearance detection device

Abstract

The present invention discloses a device for detecting the appearance of components, belonging to the technical field of device appearance detection, and capable of solving the problem that the imaging quality of the existing detection device is poor, thus affecting the detection effect. The device includes: a transmission module, including a base and a conveyor belt arranged on the base; a plurality of detection platforms, arranged in a row on the conveyor belt, and the detection platforms are used for carrying the components to be detected; the conveyor belt is used to drive the plurality of detection platforms to move; a feeding module, arranged on one side of the feeding area of the transmission module, and used to provide the components to be detected to the detection platforms that move to the feeding area; a detection module, arranged on the base, and used to perform six-sided detection on the components on the detection platforms. The present invention is used for the appearance detection of components.

Description

Technical Field

[0001] The present invention relates to a device for detecting the appearance of components, belonging to the technical field of device appearance detection. Background Art

[0002] With the rapid development of modern manufacturing, higher and higher requirements are put forward for the appearance quality of components in various fields of manufacturing. Component appearance defect detection equipment mainly detects defects such as depressions, scratches, corrosion, and defects on the surface of components through technical means such as machinery, electronics, optical imaging, and image processing, and screens out qualified components to ensure the quality and reliability of components.

[0003] Currently, component appearance detection equipment mainly completes detection by taking pictures of six sides of components through cameras. Specifically, the components to be detected are scattered on a glass ring through a feeding vibrating disk, and the glass ring rotates uniformly around the center. The glass ring is made of transparent glass, and three cameras are distributed on the periphery of the glass ring for detecting the appearance of the left, right, and front surfaces of the components. One camera is distributed inside the inner ring of the glass ring for detecting the appearance of the rear surface of the components. One camera is distributed vertically above the glass ring for detecting the upper surface of the components. One camera is distributed below the glass through the glass for detecting the lower surface of the components.

[0004] However, the above-mentioned component appearance detection equipment usually has the following problems: (1) There is a large interference between workstations, especially a large influence of reflection, and it is impossible to detect scratches on the surface of components; (2) Components are scattered on the glass ring. Because there is no positioning device, the direction of the components to be detected is not fixed, and the image plane of the cameras at each workstation changes greatly, making it difficult to achieve accurate recognition. (3) High requirements are imposed on the cameras, especially the rear camera; because it is arranged inside the glass ring and the space is limited, a precision lens is required to adapt. (4) Difficult to discharge; Discharging requires using an air rod to push the components to be detected off the glass ring. In this process, because it is inevitable to rub against the glass surface, the glass ring is worn. (5) Due to the circular motion, it is difficult for the left and right cameras to capture a suitable position. Since the camera at the workstation needs to be triggered by a sensor, and there is a certain time error between the sensor trigger and the camera shooting, it is difficult to ensure that the camera can capture the surface of the detection component at the right time, thus affecting the detection effect. Summary of the Invention

[0005] The present invention provides a device for detecting the appearance of components, which can solve the problem that the imaging quality of the existing detection device is poor, thus affecting the detection effect.

[0006] The present invention provides a device for detecting the appearance of components, and the device includes:

[0007] A transmission module, including a base and a conveyor belt arranged on the base;

[0008] Multiple inspection stations are arranged in a row on the conveyor belt. The inspection stations are used to carry the components to be inspected; the conveyor belt is used to drive the multiple inspection stations to move;

[0009] A loading module is arranged on one side of the loading area of the conveying module and is used to provide the components to be inspected to the inspection stations that move to the loading area;

[0010] An inspection module is arranged on the base and is used to perform six-sided inspection on the components on the inspection stations.

[0011] Optionally, the inspection station includes:

[0012] A bracket unit is arranged on the conveyor belt;

[0013] A bearing unit is connected to the bracket unit and is used to carry the components to be inspected. The bearing surface of the bearing unit forms a preset angle with the horizontal plane.

[0014] Optionally, the bracket unit includes:

[0015] An angle adjuster is arranged on the conveyor belt;

[0016] A support rod is connected to the angle adjuster. The angle adjuster is used to adjust the inclination angle of the support rod.

[0017] Optionally, the bearing unit includes:

[0018] A tray is connected to the end of the support rod away from the angle adjuster; the inclination angle of the tray is the same as the inclination angle of the support rod;

[0019] A baffle is connected to the end of the tray away from the angle adjuster and is used to limit the components on the tray.

[0020] Optionally, the baffle includes a bottom wall and two side walls connected to opposite edges of the bottom wall; the included angle between the side wall and the bottom wall is an obtuse angle; the width of the bottom wall is adapted to the size of the component.

[0021] Optionally, a trigger is arranged on each inspection station; the inspection module includes:

[0022] Multiple image acquisition components are distributed on the base and are used to acquire six-sided images of the components on the inspection stations;

[0023] Multiple sensing components are arranged on the base; the sensing components correspond to the image acquisition components one by one; the trigger is used to trigger the sensing component so that the sensing component sends acquisition control information to the corresponding image acquisition component.

[0024] Optionally, the device further includes:

[0025] A blanking module, disposed on one side of the blanking area of the transmission module, for classifying and recycling the components that move to the inspection table in the blanking area.

[0026] Optionally, the device further includes:

[0027] A control module, connected to both the detection module and the blanking module, for controlling the blanking module to classify and recycle the components according to the detection results of the detection module.

[0028] Optionally, the blanking module includes:

[0029] A classification unit, disposed below the blanking area of the transmission module;

[0030] Three collection hoppers, arranged side by side below the classification unit, for collecting components with different detection results respectively;

[0031] The control module is used to send classification control information to the classification unit according to the detection results of the detection module, so as to control the classification unit to classify the components that move to the inspection table in the blanking area into the corresponding collection hoppers.

[0032] Optionally, the classification unit includes:

[0033] A classification guide rail, disposed below the blanking area of the transmission module, for receiving the components that move to the inspection table in the blanking area;

[0034] A driving motor, connected to the classification guide rail, for driving the classification guide rail to tilt and rotate according to the classification control information, so that the components on the classification guide rail fall into the corresponding collection hoppers.

[0035] Optionally, the conveyor belt is a chain plate conveyor belt.

[0036] Optionally, the triggering member is a magnet, and the sensing member is a Hall sensor.

[0037] The beneficial effects that the present invention can produce include:

[0038] (1) The component appearance detection device provided by the present invention arranges multiple detection stations in rows on the conveyor belt, and uses the conveyor belt to drive the detection stations to move, so that the detection module can perform six-sided detection on the components on the detection stations. The present invention uses a linear station layout, so theoretically the number of stations is not limited by space and can exceed six stations; and compared with the circular layout, it will not cause distortion due to untimely camera image acquisition caused by arc movement; at the same time, because there is an interval between each station, compared with the circular structure, it can avoid imaging interference caused by mutual interference of fill lights, and because there is a more sufficient working area, there is greater freedom in placing the image acquisition component (such as a camera), so the requirements for the focal length, minimum working distance, etc. of the image acquisition component are lower.

[0039] (2) The component appearance detection device provided by the present invention uses a transparent tray with an inclination angle to carry the components, and can perform six-direction detection after positioning the components. Since the self-positioning method is used for only one component positioning, and all subsequent station operations are based on this positioning, the positioning accuracy is very high. When performing image acquisition, it will not cause recognition errors due to positioning errors, ensuring the imaging quality. And because only one self-positioning operation is performed during the feeding process, it can run without deceleration during operation, and the speed is extremely fast.

[0040] (3) The component appearance detection device provided by the present invention has a simple structure and is easy to process, so the manufacturing cost of the whole machine is low. Since no automation equipment such as manipulators and cylinders is introduced, the energy consumption is low and the equipment wear cost is low, which is very suitable for detecting component defects with low costs. Description of the Drawings

[0041] Figure 1 It is a schematic diagram of the overall structure of the component appearance detection device provided by the embodiment of the present invention;

[0042] Figure 2 It is a schematic diagram of the structure of the transmission module, detection station and detection module provided by the embodiment of the present invention;

[0043] Figure 3 It is a schematic diagram of the structure of the tray and baffle provided by the embodiment of the present invention;

[0044] Figure 4 It is a schematic diagram of the distribution of image acquisition components provided by the embodiment of the present invention;

[0045] Figure 5 It is a schematic diagram of the structure of the blanking module provided by the embodiment of the present invention.

[0046] List of Components and Reference Numerals:

[0047] 10. Transmission module; 11. Base; 12. Transmission belt; 13. Metal plate chain; 20. Detection table; 21. Angle adjuster; 22. Support rod; 23. Tray; 24. Baffle; 241. Bottom wall; 242. Side wall; 30. Loading module; 40. Detection module; 41. Sensing element; 42. Triggering element; 43. Support frame; 44. Image acquisition element; 50. Unloading module; 51. Classification guide rail; 52. Driving motor; 53. Guide rail support; 54. Scrap collection hopper; 55. Finished product collection hopper; 56. Unidentified collection hopper; 60. Components. Detailed implementation manners

[0048] The present invention will be described in detail below in conjunction with embodiments, but the present invention is not limited to these embodiments.

[0049] An embodiment of the present invention provides a device for detecting the appearance of components, as Figures 1 to 5 shown, the device includes:

[0050] A transmission module 10, including a base 11 and a transmission belt 12 arranged on the base 11; in practical applications, the transmission belt 12 can be a conveyor belt with a metal plate chain 13 having a length of more than 2000 mm.

[0051] A plurality of detection tables 20 are arranged in a row on the transmission belt 12, and the detection tables 20 are used to carry the components 60 to be detected; the transmission belt 12 is used to drive the plurality of detection tables 20 to move; specifically, the detection tables 20 are installed on the metal plate chain 13 of the transmission belt 12.

[0052] A loading module 30 is arranged on one side of the loading area of the transmission module 10, and is used to provide the components 60 to be detected to the detection tables 20 that move to the loading area. In practical applications, the loading module 30 can use a vibrating disk for feeding.

[0053] A detection module 40 is arranged on the base 11 and is used to perform six-sided detection on the components 60 on the detection tables 20.

[0054] Further, the detection table 20 includes:

[0055] A bracket unit arranged on the transmission belt 12;

[0056] A bearing unit connected to the bracket unit and used to carry the components 60 to be detected, and the bearing surface of the bearing unit forms a preset angle with the horizontal plane.

[0057] Specifically, referring to Figure 2 shown, the bracket unit includes: an angle adjuster 21 arranged on the transmission belt 12; a support rod 22 connected to the angle adjuster 21, and the angle adjuster 21 is used to adjust the inclination angle of the support rod 22.

[0058] The bearing unit includes: a tray 23 connected to one end of a support rod 22 away from the angle adjuster 21; the inclination angle of the tray 23 is the same as that of the support rod 22; a baffle 24 connected to one end of the tray 23 away from the angle adjuster 21 for limiting the components 60 on the tray 23. Wherein, the baffle 24 includes a bottom wall 241 and two side walls 242 connected to opposite edges of the bottom wall 241; the included angle between the side wall 242 and the bottom wall 241 is an obtuse angle; the width of the bottom wall 241 is adapted to the size of the component 60.

[0059] Reference Figure 2 and Figure 3 As shown, the angle adjuster 21 is installed on the metal chain plate and can adjust the inclination angle of the tray 23 up and down.

[0060] The support rod 22 is a sheet metal structure for supporting the tray 23.

[0061] The tray 23 is a colorless and transparent acrylic board with a scratch-proof protective film attached; since there will be friction between the metal component 60 and the tray 23, the protective film can be a mobile phone tempered film, and the tempered film can effectively reduce the frictional effect between the surface of the component 60 and the tray 23 to protect the surface of the tray 23 from being scratched by the metal component 60 during long-term operation. Since the tray 23 is colorless and transparent, after the image acquisition member 44 (such as a camera) is arranged perpendicular to the tray 23, the camera can capture the appearance of the lower surface of the component 60 through the acrylic board.

[0062] The baffle 24 is a V-shaped acrylic structural member with a flat front end. The component 60 to be detected is placed on the tray 23. Since the tray 23 has a certain inclination angle, the component 60 to be detected will slide down due to the gravity, so that the flat section at the rear end of the baffle 24 (i.e., the bottom wall 241) is closely attached to the contact surface end of the component 60. The width of the bottom wall 241 of the baffle 24 is the same as the length of the contact surface of the component 60, thereby restricting the up and down and front and back movement of the component 60. At the same time, since there are two side walls 242 on both sides of the baffle 24, the side walls 242 can effectively prevent the component 60 from moving left and right and jumping back and forth, so that the component 60 always maintains a state during the detection process. The present invention realizes the positioning of the component 60 well by setting the tray 23 to have a certain inclination angle and arranging the baffle 24 at the end of the tray 23, and using the tray 23 and the baffle 24.

[0063] Furthermore, a trigger member 42 is provided on each detection table 20; the detection module 40 includes:

[0064] A plurality of image acquisition components 44 are evenly distributed on the base 11 and are used to acquire six-sided images of the component 60 on the detection table 20. Among them, the image acquisition component 44 can be a device with image acquisition function such as a camera. Generally, 6 image acquisition components 44 can be provided to acquire images of six surfaces of the component 60 respectively. In the embodiment of the present invention, the specific distribution position of the image acquisition component 44 on the base 11 is not limited, as long as the corresponding surface image of the component 60 can be acquired.

[0065] A plurality of sensing components 41 are arranged on the base 11; the sensing components 41 correspond to the image acquisition components 44 one by one; the triggering component 42 is used to trigger the sensing components 41 so that the sensing components 41 send acquisition control information to the corresponding image acquisition components 44.

[0066] Reference Figure 2 And Figure 4 As shown in the figure, the triggering component 42 is arranged on the lower surface of the support rod 22; a plurality of support frames 43 are connected to the base 11, and one sensing component 41 is arranged on each support frame 43; the sensing components 41 correspond to the image acquisition components 44 one by one, and each sensing component 41 can send acquisition control information to the corresponding image acquisition component 44. During the process of the conveyor belt 12 driving the detection table 20 to move, when the triggering component 42 on the lower surface of the support rod 22 is opposite to the sensing component 41 on the support frame 43 in position, the triggering component 42 can trigger the sensing component 41 so that the sensing component 41 sends acquisition control information to the corresponding image acquisition component 44, and the image acquisition component 44 performs image acquisition according to the acquisition control information.

[0067] Among them, the triggering component 42 can be a magnet, and the sensing component 41 can be a Hall sensor.

[0068] Figure 4The distribution of the image acquisition components 44 is simply shown. Specifically, after the inspection table 20 is loaded in the loading area and moves to the first station, the magnet on the inspection table 20 triggers the Hall sensor at the first station, so that the Hall sensor sends acquisition control information to the corresponding image acquisition component 44. At this time, the upper image acquisition component 44 directly above the component 60 acquires the upper surface image of the component 60, and the right-side image acquisition component 44 on the right side of the component 60 acquires the right surface image of the component 60 through the transparent baffle 24; when the inspection table 20 moves to the second station, the magnet on the inspection table 20 triggers the Hall sensor at the second station. At this time, the front-side image acquisition component 44 in front of the component 60 acquires the front surface image of the component 60; when the inspection table 20 moves to the third station, the magnet on the inspection table 20 triggers the Hall sensor at the third station. At this time, the rear-side image acquisition component 44 behind the component 60 acquires the rear surface image of the component 60 through the bottom wall 241 of the transparent baffle 24; when the inspection table 20 moves to the fourth station, the magnet on the inspection table 20 triggers the Hall sensor at the fourth station. At this time, the lower image acquisition component 44 below the component 60 acquires the lower surface image of the component 60 through the transparent tray 23; when the inspection table 20 moves to the fifth station, the magnet on the inspection table 20 triggers the Hall sensor at the fifth station. At this time, the left-side image acquisition component 44 on the left side of the component 60 acquires the left surface image of the component 60 through the side wall 242 of the transparent baffle 24; thus, the six-sided image acquisition of the component 60 is completed. In practical applications, the image acquisition components 44 can be connected to the base 11 through a bracket structure, and the specific form of the bracket structure is not limited in the embodiments of the present invention.

[0069] In the embodiments of the present invention, the device further includes:

[0070] A blanking module 50, disposed on one side of the blanking area of the transmission module 10, for classifying and recycling the components 60 on the inspection table 20 that move to the blanking area.

[0071] A control module, connected to both the detection module 40 and the blanking module 50, for controlling the blanking module 50 to classify and recycle the components 60 according to the detection results of the detection module 40.

[0072] Further, the blanking module 50 includes:

[0073] A classification unit, disposed below the blanking area of the transmission module 10;

[0074] Three collection hoppers, arranged side by side below the classification unit, for respectively collecting the components 60 with different detection results;

[0075] The control module is used to send classification control information to the classification unit according to the detection results of the detection module 40, so as to control the classification unit to classify the components 60 on the inspection table 20 moved to the blanking area into the corresponding collection hoppers.

[0076] Specifically, the classification unit includes:

[0077] The classification guide rail 51 is arranged below the blanking area of the transmission module 10 and is used to receive the components 60 on the inspection table 20 moved to the blanking area;

[0078] The driving motor 52 is connected to the classification guide rail 51 and is used to drive the classification guide rail 51 to tilt and rotate according to the classification control information, so that the components 60 on the classification guide rail 51 fall into the corresponding collection hoppers.

[0079] The blanking module 50 is a sorting device with a classification guide rail 51. It consists of four parts: the guide rail support 53, the classification guide rail 51, the driving motor 52, and the collection hoppers.

[0080] Among them, the guide rail support 53 is used to support the driving motor 52.

[0081] The driving motor 52 can be a stepping motor, which is used to control the inclination angle of the classification guide rail 51 so that the components 60 fall into the corresponding collection hoppers.

[0082] The classification guide rail 51 has a structure that is wider at the top and narrower at the bottom, which can guide the components 60 into the collection hoppers.

[0083] The collection hoppers are divided into a finished product collection hopper 55 (in the middle), a waste product collection hopper 54 (on the right), and an unrecognized collection hopper 56 (on the left). Among them, when it fails to successfully determine whether it is a finished product during the detection process, the unrecognized collection hopper 56 will guide the components 60 into this hopper area for recycling and re-detection.

[0084] In practical applications, the detection module 40 acquires six-sided images of the components 60, performs image recognition on the six-sided images of the components 60 to determine whether there are defects, and then obtains the detection results of the components 60; then sends the detection results of the components 60 to the control module, and the control module sends classification control information to the driving motor 52 according to the detection results of the detection module 40; the driving motor 52 drives the classification guide rail 51 to tilt and rotate according to the classification control information, so that the components 60 on the classification guide rail 51 fall into the corresponding collection hoppers.

[0085] Reference Figure 1 、 Figure 2 and Figure 5As shown, the inspection table 20 moves driven by the conveyor belt 12. When it moves to the end corner of the base 11, the inspection table 20 will automatically turn over, so that the components 60 on the tray 23 fall onto the sorting guide rail 51.

[0086] When the inspection module 40 detects that the component 60 has no appearance defect, it sends the inspection result that the component 60 is a finished component to the control module. The control module sends a non-tilting control signal to the drive motor 52 to control the sorting guide rail 51 not to tilt left and right, so that the components 60 on the sorting guide rail 51 fall into the middle finished product collection hopper 55.

[0087] When the inspection module 40 detects that the component 60 has an appearance defect, it sends the inspection result that the component 60 is a defective component to the control module. The control module sends a right-tilting control signal to the drive motor 52 to control the sorting guide rail 51 to tilt to the right, so that the components 60 on the sorting guide rail 51 fall into the right defective product collection hopper 54.

[0088] When the inspection module 40 does not detect whether the component 60 has an appearance defect, it sends the inspection result that the component 60 is an unrecognized component to the control module. The control module sends a left-tilting control signal to the drive motor 52 to control the sorting guide rail 51 to tilt to the left, so that the components 60 on the sorting guide rail 51 fall into the left unrecognized collection hopper 56.

[0089] In the present invention, a plurality of inspection tables 20 are arranged in rows on the conveyor belt 12, and the conveyor belt 12 is used to drive the inspection table 20 to move, so that the inspection module 40 can perform six-sided inspection on the components 60 on the inspection table 20. The present invention uses a linear station layout. Therefore, theoretically, the number of stations is not limited by space and can exceed 6 stations; and compared with the circular layout, it will not cause distortion due to untimely camera image acquisition caused by arc movement; at the same time, because there is an interval between each station, compared with the circular structure, it can avoid imaging interference caused by the mutual interference of supplementary lights, and because there is a more sufficient working area, there is a greater degree of freedom for placing the image acquisition member 44 (such as a camera), so the requirements for the focal length, minimum working distance, etc. of the image acquisition member 44 are lower.

[0090] In the present invention, by using the transparent tray 23 with an inclination angle to carry the component 60, six-direction detection can be performed after the component 60 is positioned. Since the self-positioning method is adopted and the component 60 is positioned only once, and all subsequent station operations are carried out based on this one positioning, the problems of increased equipment complexity and introduction of cumulative errors caused by secondary positioning are avoided. Therefore, the positioning accuracy is very high. When image acquisition is performed, recognition errors will not be caused by positioning errors, ensuring the imaging quality. And since only one self-positioning operation is performed during the detection process, non-decelerating operation can be implemented during operation, and the speed is extremely fast.

[0091] The structure of the present invention is simple and the equipment is easy to process, so the manufacturing cost of the whole machine equipment is low. Since no automation equipment such as manipulators and cylinders is introduced, the energy consumption is low and the equipment wear cost is low, which is very suitable for the defect detection of components 60 with low costs.

[0092] The above are only several embodiments of the present application and do not impose any form of limitation on the present application. Although the present application is disclosed above with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, making some changes or modifications using the technical content disclosed above is equivalent to equivalent implementation cases and all fall within the scope of the technical solution.

Claims

1. An appearance detection device for components, characterized in that, The device includes: A transmission module, including a base and a conveyor belt arranged on the base; A plurality of detection stations, arranged in a row on the conveyor belt, and the detection stations are used to carry the components to be detected; the conveyor belt is used to drive the plurality of detection stations to move; A loading module, arranged on one side of the loading area of the transmission module, and is used to provide the components to be detected to the detection stations that move to the loading area; A detection module, arranged on the base, and is used to perform six-sided detection on the components on the detection stations; An unloading module, arranged on one side of the unloading area of the transmission module, and is used to classify and recycle the components on the detection stations that move to the unloading area; A control module, connected to both the detection module and the unloading module, and is used to control the unloading module to classify and recycle the components according to the detection results of the detection module; The unloading module includes: a classification unit, arranged below the unloading area of the transmission module; three collection hoppers, arranged side by side below the classification unit, and are used to collect components with different detection results respectively; The control module is used to send classification control information to the classification unit according to the detection results of the detection module, so as to control the classification unit to classify the components on the detection stations that move to the unloading area into the corresponding collection hoppers; The classification unit includes: a classification guide rail, arranged below the unloading area of the transmission module, and is used to receive the components on the detection stations that move to the unloading area; a driving motor, connected to the classification guide rail, and is used to drive the classification guide rail to tilt and rotate according to the classification control information, so that the components on the classification guide rail fall into the corresponding collection hoppers.

2. The device according to claim 1, characterized in that, The detection station includes: A bracket unit, arranged on the conveyor belt; A bearing unit, connected to the bracket unit, and is used to carry the components to be detected, and the bearing surface of the bearing unit forms a preset angle with the horizontal plane.

3. The device according to claim 2, characterized in that, The bracket unit includes: An angle adjuster, arranged on the conveyor belt; A support rod, connected to the angle adjuster, and the angle adjuster is used to adjust the inclination angle of the support rod.

4. The device according to claim 3, characterized in that, The bearing unit includes: A tray, connected to the end of the support rod away from the angle adjuster; the inclination angle of the tray is the same as the inclination angle of the support rod; A baffle, connected to the end of the tray away from the angle adjuster, and is used to limit the components on the tray.

5. The device according to claim 4, characterized in that, The baffle includes a bottom wall and two side walls connected to opposite edges of the bottom wall; the included angle between the side wall and the bottom wall is an obtuse angle; the width of the bottom wall is adapted to the size of the component.

6. The device according to claim 1, characterized in that, A trigger is arranged on each detection station; the detection module includes: A plurality of image acquisition components, evenly distributed on the base, and are used to acquire six-sided images of the components on the detection stations; A plurality of sensing components, arranged on the base; the sensing components correspond to the image acquisition components one by one; the trigger is used to trigger the sensing component, so that the sensing component sends acquisition control information to the corresponding image acquisition component.

Images