CN216819897U

CN216819897U - Cell-phone center outward appearance detection mechanism

Info

Publication number: CN216819897U
Application number: CN202123433640.6U
Authority: CN
Inventors: 周岳国; 林国梁; 陈金龙; 陈文海; 陈晓鸿
Original assignee: Tongda Xiamen Technology Co ltd
Current assignee: Tongda Xiamen Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-24
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to a mobile phone middle frame appearance detection mechanism which comprises a cabinet, a conveying belt, a carrying module, an XY module, a camera module, a PLC control system and an AI defect identification system, wherein the conveying belt is arranged on the cabinet; a tray is placed on the conveying belt, a plurality of first positioning jigs are arranged on the tray and used for positioning and placing a spraying injection molding mobile phone middle frame, and a groove is formed between the two positioning jigs and used for placing the spraying injection molding mobile phone middle frame with the detected defects; conveyer belt, transport module, XY module and camera module are controlled by PLC control system, and the outward appearance of the cell-phone center of moulding plastics to the spraying is shot automatically, and AI defect identification system handles the picture of shooing, and whether intelligent identification is defective and returns the identification result to PLC control system in order to carry out automatic sorting. The mobile phone middle frame appearance sorting device is compact in structure and high in automation degree, can finish automatic detection and sorting of the appearances of a plurality of mobile phone middle frames at one time, and is high in working efficiency.

Description

Cell-phone center outward appearance detection mechanism

Technical Field

The utility model relates to the field of mobile phone production, in particular to a mobile phone middle frame appearance detection mechanism.

Background

The appearance defects of the mobile phone are various and varied, and the main defects comprise stains, scratches, edge loss, cracks, water mark watermarks, bubbles, fingerprints, foreign matters, printing ink, different colors, and the like on the shell of the mobile phone. At present, the appearance of the whole mobile phone is basically in a state of full-artificial visual detection. Due to the requirement of precision industrial detection of the whole mobile phone, the traditional machine vision system is difficult to solve the defect detection problems through programming. The detection of the appearance of the mobile phone relates to the detection requirement of fine defects in curved surfaces and complex texture images, and can only be finished by secondary recheck of artificial naked eyes, so that the additional cost is increased.

Disclosure of Invention

The utility model aims to provide a mobile phone middle frame appearance detection mechanism capable of reliably detecting appearance defects of a mobile phone middle frame. Therefore, the utility model adopts the following specific technical scheme:

a mobile phone middle frame appearance detection mechanism is characterized in that the left-right direction is defined as an X direction, the front-back direction is defined as a Y direction, and the up-down direction is defined as a Z direction, the mobile phone middle frame appearance detection mechanism comprises a cabinet, a conveying belt installed on the cabinet, a carrying module, an XY module, a camera module, a PLC control system and an AI defect recognition system, wherein the conveying belt extends along the X direction, a tray is placed on the conveying belt, a plurality of first positioning jigs are arranged on the tray and used for positioning and placing a mobile phone middle frame to be detected, a groove is arranged between the two first positioning jigs and used for placing the mobile phone middle frame with the detected defects; the carrying module is controlled by the PLC control system to carry the mobile phone middle frame from the tray to a rotary positioning jig of the XY module; the XY module comprises an XY two-dimensional motion platform and a plurality of rotary positioning jigs arranged on the XY two-dimensional motion platform; the XY two-dimensional motion platform is controlled by the PLC control system to move the mobile phone middle frame towards or away from the camera module and move left and right relative to the camera module; the rotary positioning jig is controlled by the PLC control system to rotate the mobile phone middle frame by a preset angle; the camera module comprises a camera array and a light source array, the camera array is controlled by the PLC control system to automatically and continuously shoot the middle frame of the mobile phone and send shot pictures to the AI defect recognition system, and the light source array provides the brightness required by shooting of the camera array; the AI defect identification system processes the shot picture, intelligently identifies whether the picture has defects or not and returns the identification result to the PLC control system for automatic sorting.

Further, the carrying module comprises a YZ two-dimensional motion module, a turnover module and a suction nozzle module, the turnover module is installed on a lifting frame of the YZ two-dimensional motion module, and the suction nozzle module is installed on a turnover plate of the turnover module.

Further, the YZ two-dimensional motion module comprises an electric sliding table, a slide rail and slide block pair, a lifting cylinder mounting plate, a lifting cylinder and a lifting frame, wherein the electric sliding table and the slide rail and slide block pair extend along the Y direction; two ends of the lifting cylinder mounting plate are respectively fixed on the electric sliding table and a sliding block of the sliding rail sliding block pair; the lifting cylinder is fixedly arranged on the lifting cylinder mounting plate, and a telescopic rod of the lifting cylinder extends downwards and is connected with the lifting frame; the lifting frame is hung on the lifting cylinder mounting plate through four guide posts and corresponding linear bearings.

Furthermore, the overturning module comprises a motor, a synchronous belt and an overturning plate; the motor is fixed on a transverse plate of the lifting frame, an output shaft of the motor is in driving connection with the turnover plate through the synchronous wheel belt, and two ends of the turnover plate are installed on side plates of the lifting frame through corresponding rotating shafts.

Furthermore, the suction nozzle modules comprise two groups of suction nozzle modules which are respectively and fixedly installed on the upper surface and the lower surface of the turnover plate.

Further, the XY two-dimensional motion platform comprises a Y-axis electric sliding table, a Y-axis sliding rail sliding block pair, a lower mounting plate, an X-axis electric sliding table and an upper mounting plate, wherein the lower mounting plate is fixed on corresponding sliding blocks of the Y-axis electric sliding table and the Y-axis sliding rail sliding block pair; the X-axis electric sliding table is fixedly arranged on the lower mounting plate; the upper mounting plate is fixed on a sliding block of the X-axis electric sliding table; the upper mounting plate is provided with a plurality of branches spaced in the left-right direction, and the rotary positioning jig is mounted on the branches.

Further, the rotary positioning jig comprises a motor, a synchronous belt, a rotating shaft and a second positioning jig, wherein the motor is fixedly installed on the fork, and an output shaft of the motor extends out of the fork upwards; the synchronous belt is arranged on an output shaft of the motor and the rotating shaft, and the rotating shaft is arranged on the fork through a bearing; the second positioning jig is fixedly connected to the rotating shaft.

Further, the camera array comprises an upper camera, a middle camera and a lower camera, wherein the upper camera is used for shooting the upper edges of the R corner and the straight edge of the middle frame of the mobile phone, the middle camera is used for shooting the middle area of the R corner and the straight edge of the middle frame of the mobile phone, and the lower camera is used for shooting the lower edges of the R corner and the straight edge of the middle frame of the mobile phone.

Further, the light source array comprises a first light source and a second light source, the first light source irradiates on the frame of the middle frame of the mobile phone from top to bottom, and the second light source horizontally irradiates on the frame of the middle frame of the mobile phone from the side.

Further, the rack is equipped with dust cover, install FFU on the dust cover.

By adopting the technical scheme, the utility model has the beneficial effects that: the mobile phone middle frame appearance sorting device is compact in structure and high in automation degree, can finish automatic detection and sorting of the appearances of a plurality of mobile phone middle frames at one time, and is high in working efficiency.

Drawings

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a perspective view of a mobile phone center appearance inspection mechanism of the present invention;

fig. 2 is a perspective view of the outer appearance inspection mechanism of the cell phone middle frame shown in fig. 1, with the dust-proof cover removed;

fig. 3 is a perspective view of a carrying module of the mobile phone middle frame appearance detecting mechanism shown in fig. 2;

fig. 4 is a perspective view of the XY module of the mobile phone middle frame appearance detecting mechanism shown in fig. 2;

FIG. 5 is a perspective view of a camera module of the mechanism for detecting the appearance of the middle frame of the mobile phone shown in FIG. 2;

fig. 6 is a perspective view of a middle frame of a mobile phone.

Detailed Description

It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present application, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations or positional relationships that are based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description and ease of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1-6, a mobile phone center appearance detection mechanism is described. For convenience of description, an XYZ coordinate system is defined, as shown in fig. 1, in which a left-right direction is defined as an X direction, a front-back direction is defined as a Y direction, and an up-down direction is defined as a Z direction. Rack 11, install conveyer belt 12, transport module 13, XY module 14, camera module 15, PLC control system and AI defect identification system on rack 11, PLC control system is used for controlling conveyer belt 12, transport module 13, XY module 14 and the action of camera module 15 to accomplish the outward appearance of cell-phone center 100 automatically and detect. The AI defect recognition system processes the photographed picture (e.g., filtering, binarization, thresholding, ROI acquisition, anomaly removal, blur removal, etc.), intelligently recognizes whether there is a defect and returns the recognition result to the PLC control system for automatic sorting. The AI defect recognition system adopts a deep learning algorithm to train and predict a defect recognition model, so that the recognition speed and accuracy can be greatly improved. The PLC control system includes a PLC controller, an IO card, a human-machine interface, and the like, and the structure thereof is well known and will not be described herein. The AI defect recognition system can include an industrial personal computer and defect recognition software installed on the industrial personal computer. The industrial personal computer is connected with the PLC control system through a communication line (a serial port line or a network cable and the like). The AI defect identification system can also have the functions of defect statistics, classification and the like.

The cabinet 11 may be assembled by aluminum profiles and acrylic plates. The conveying belt 12 extends along the X direction, a tray 121 is placed on the conveying belt, a plurality of (four shown) positioning jigs 1211 are arranged on the tray 121, the positioning jigs 1211 are used for positioning and placing the middle mobile phone frame 100, a groove 1212 is arranged between the two positioning jigs 1211, and the groove 1212 is used for placing the middle mobile phone frame 100 with the detected defects. That is, when the mobile phone middle frame 100 is placed on the positioning jig 1211 of the tray 121 during the blanking, it indicates that there is no defect in the appearance; if the cell phone bezel 100 is in the recess 22 of the tray 2, it indicates a defective appearance. The structure of the conveyor belt 12 is well known and will not be described here.

The carrying module 13 is controlled by the PLC control system to carry the cell phone center 100 from the tray 121 on the conveyor 12 to the rotary positioning fixture 142 of the XY module 14. Specifically, as shown in fig. 3, the carrying module 13 may include a YZ two-dimensional motion module 131, a flipping module 132, and a nozzle module 133. Wherein the YZ two-dimensional motion module 131 is mounted on the bracket 134. The bracket 134 is formed by welding a vertical column 1341 and a longitudinal beam 1342 extending in the Y direction. The YZ two-dimensional motion module 131 includes an electric slide 1311 and a slide rail-slider pair 1312 extending in the Y direction, a lift cylinder mounting plate 1313, a lift cylinder 1314, and a lift frame 1315. The electric sliding table 1311 and the sliding rail slider pair 1312 are respectively fixedly mounted on two longitudinal beams 1342 of the bracket 134. Two ends of the lifting cylinder mounting plate 1313 are respectively fixed on the electric sliding table 1311 and the sliding blocks of the sliding rail sliding block pair 1312. The lifting cylinder 1314 is fixedly arranged on a lifting cylinder mounting plate 1313, and the telescopic rod of the lifting cylinder 1314 extends downwards to be connected with the lifting frame 1315. The lifting frame 1315 is suspended on the lifting cylinder mounting plate 1313 through four guide posts and corresponding linear bearings. The flipping module 132 may include a motor 1321, a timing belt 1322, and a flipping plate 1323. The motor 1321 is fixed on the transverse plate of the lifting frame 1315, the rotating shafts 1324 are fixed at two ends of the overturning plate 1323, the rotating shafts 1324 are installed on the side plates of the lifting frame 1315 through bearings, and one rotating shaft 1324 is in driving connection with the motor 1321 through a synchronous wheel belt 1322. Accordingly, the flipping panel 1323 may be flipped by the motor 1321. The two sets of nozzle modules 133 are fixedly mounted on the upper and lower surfaces of the overturning plate 1323, respectively. Each group of nozzle modules 133 includes four nozzle modules 133, and each nozzle module 133 has a plurality of vacuum nozzles. Through setting up two sets of suction nozzle module 133 about, can improve work efficiency.

As shown in fig. 4, the XY module 14 may include an XY two-dimensional motion stage 141 and a plurality of (4 shown) rotary positioning jigs 142 mounted on the XY two-dimensional motion stage 141. The XY two-dimensional motion platform 141 can be controlled by the PLC control system to move the cell phone center 100 toward or away from the camera module 15 and to the left or right relative to the camera module 15. The XY two-dimensional motion stage 141 may be pneumatic or electric. Specifically, the XY two-dimensional motion platform 141 may include a Y-axis electric sliding table 1411, a Y-axis slide rail pair 1412, a lower mounting plate 1413, an X-axis electric sliding table 1414 and an upper mounting plate 1415, wherein the lower mounting plate 1413 is fixed on the Y-axis electric sliding table 1411 and the corresponding slide blocks of the Y-axis slide rail pair 1412, the X-axis electric sliding table 1414 is fixedly mounted on the lower mounting plate 1413, and the upper mounting plate 1415 is fixed on the slide block of the X-axis electric sliding table 141. The upper mounting plate 1415 has four branches 14151 spaced apart in the left-right direction. The rotary positioning jig 142 is rotatably mounted on the upper mounting plate 1415 (specifically, the respective forks 14151). Specifically, the rotating positioning fixture 142 may include a motor 1421, a synchronous belt 1422, a rotating shaft 1423, and a positioning fixture 1424, wherein the motor 1421 is fixedly mounted on the branch 14151 of the upper mounting plate 1415, and an output shaft of the motor 1421 extends upward out of the upper mounting plate 1415, the synchronous belt 1422 is mounted on the output shaft of the motor 1421 and the rotating shaft 1423, and the rotating shaft 1423 is mounted on the upper mounting plate 1415 through a bearing. The positioning fixture 1424 is fixedly connected to the rotating shaft 1423. The middle frame 100 of the mobile phone is positioned on the positioning fixture 1424 so that it can rotate 360 degrees.

As shown in fig. 5, the camera module 15 includes a camera array 151 and a light source array 152, the camera array 151 is controlled by the PLC control system to automatically take continuous shots of the mobile phone center 100 and send the shot pictures to the AI defect recognition system, and the light source array 152 provides brightness required for the camera array to take the shots. Specifically, the camera array 151 may include 4 upper cameras 1511, 4 middle cameras 1512, and 4 lower cameras 1513, where the upper cameras 1511 are used to photograph upper edges of the R corners and the straight edges of the middle frame 100 of the mobile phone, the middle cameras 1512 are used to photograph middle regions of the R corners and the straight edges of the middle frame 100 of the mobile phone, and the lower cameras 1513 are used to photograph lower edges of the R corners and the straight edges of the middle frame 100 of the mobile phone. That is, the upper camera 1511 is shot from top to bottom, the middle camera 1512 is shot horizontally, and the lower camera 1513 is shot from bottom to top. Accordingly, the light source array 152 may include 4 first light sources 1521 and 4 second light sources 152, wherein the first light sources 1521 are illuminated on the frame of the middle frame 100 of the mobile phone from top to bottom, and the second light sources 1522 are horizontally emitted from the side onto the frame of the middle frame 100 of the mobile phone. The first light source 1521 may be a bar light source, and the second light source 152 may be a surface light source.

The mobile phone middle frame appearance detection mechanism 1 has the working process that the mobile phone middle frame 100 is sucked from the tray 121 through the lower suction nozzle module 133 of the carrying module 13, then is placed on the positioning fixture 1424 of the rotary positioning fixture 142, and then is moved to the shooting position through the XY two-dimensional motion platform 141, the camera module 15 starts to shoot the mobile phone middle frame 100, and simultaneously the rotary positioning fixture 142 drives the mobile phone middle frame 100 to rotate for a circle, so that the shooting of the frame of the whole mobile phone middle frame 100 is completed; after the shooting is finished, the XY two-dimensional motion platform 141 returns to the initial position, and the carrying module 43 sucks up the mobile phone middle frame 100 from the rotary positioning jig 442 according to the detection result, specifically, firstly sucking up the mobile phone middle frame 100 with a good appearance, then turning over the mobile phone middle frame by 180 degrees, and then sucking up the mobile phone middle frame 100 with a defective appearance; then the carrying module 43 returns to the conveyor belt 12, and according to the detection result, the middle frame 100 of the mobile phone is placed into the corresponding position of the tray 121, that is, the middle frame is placed on the positioning jig 1211 of the tray 121 with good appearance, and the middle frame is placed into the groove 1212 of the tray 121 with defective appearance; the tray 121 moves forward to enter the next station (blanking station), and at the same time, the tray 121 at the previous station enters the appearance detection station to perform the next appearance detection process.

In addition, in order to avoid dust from affecting the operation of the mechanism, the cabinet 11 of the mobile phone middle frame appearance detecting mechanism 1 is provided with a dust shield 16. The dust shield 16 is mounted with an FFU (fan filter unit) 161 to prevent dust from entering. The cabinet 11 is also provided with corresponding operating buttons 17 and a display 18, and the operating buttons 17 and the display 18 are electrically connected with the PLC control system to facilitate operation and control.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The appearance detection mechanism for the middle frame of the mobile phone is characterized in that the left-right direction is defined as an X direction, the front-back direction is defined as a Y direction, and the up-down direction is defined as a Z direction, the appearance detection mechanism for the middle frame of the mobile phone comprises a cabinet, a conveying belt installed on the cabinet, a carrying module, an XY module, a camera module, a PLC control system and an AI defect recognition system, wherein the conveying belt extends along the X direction, a tray is placed on the conveying belt, a plurality of first positioning jigs are arranged on the tray and used for positioning and placing the middle frame of the mobile phone to be detected, a groove is formed between the two first positioning jigs and used for placing the middle frame of the mobile phone with the detected defects; the carrying module is controlled by the PLC control system to carry the mobile phone middle frame from the tray to a rotary positioning jig of the XY module; the XY module comprises an XY two-dimensional motion platform and a plurality of rotary positioning jigs arranged on the XY two-dimensional motion platform; the XY two-dimensional motion platform is controlled by the PLC control system to move the mobile phone middle frame towards or away from the camera module and move left and right relative to the camera module; the rotary positioning jig is controlled by the PLC control system to rotate the mobile phone middle frame by a preset angle; the camera module comprises a camera array and a light source array, the camera array is controlled by the PLC control system to automatically and continuously shoot the middle frame of the mobile phone and send shot pictures to the AI defect recognition system, and the light source array provides the brightness required by shooting of the camera array; the AI defect identification system processes the shot picture, intelligently identifies whether the picture has defects or not and returns the identification result to the PLC control system for automatic sorting.

2. The appearance inspection mechanism for middle frames of mobile phones according to claim 1, wherein the carrying module comprises a YZ two-dimensional motion module, a flip module and a suction nozzle module, the flip module is mounted on the lifting frame of the YZ two-dimensional motion module, and the suction nozzle module is mounted on the flip plate of the flip module.

3. The appearance inspection mechanism for middle frames of mobile phones according to claim 2, wherein the YZ two-dimensional motion module comprises a power slide, a slide block pair, a lift cylinder mounting plate, a lift cylinder and a lift frame, wherein the power slide and the slide block pair extend in the Y direction; two ends of the lifting cylinder mounting plate are respectively fixed on the electric sliding table and the sliding block of the sliding rail sliding block pair; the lifting cylinder is fixedly arranged on the lifting cylinder mounting plate, and a telescopic rod of the lifting cylinder extends downwards and is connected to the lifting frame; the lifting frame is hung on the lifting cylinder mounting plate through four guide posts and corresponding linear bearings.

4. The mobile phone middle frame appearance detecting mechanism according to claim 3, wherein the turning module comprises a motor, a synchronous belt and a turning plate; the motor is fixed on a transverse plate of the lifting frame, an output shaft of the motor is in driving connection with the turnover plate through the synchronous wheel belt, and two ends of the turnover plate are installed on side plates of the lifting frame through corresponding rotating shafts.

5. The appearance inspection mechanism for middle frames of mobile phones according to claim 3, wherein said nozzle modules comprise two sets of nozzle modules fixedly mounted on the upper and lower surfaces of said flip board, respectively.

6. The appearance detection mechanism for the middle frame of the mobile phone according to claim 1, wherein the XY two-dimensional motion platform comprises a Y-axis electric sliding table, a Y-axis sliding rail sliding block pair, a lower mounting plate, an X-axis electric sliding table and an upper mounting plate, wherein the lower mounting plate is fixed on corresponding sliding blocks of the Y-axis electric sliding table and the Y-axis sliding rail sliding block pair; the X-axis electric sliding table is fixedly arranged on the lower mounting plate; the upper mounting plate is fixed on a sliding block of the X-axis electric sliding table; the upper mounting plate is provided with a plurality of branches spaced in the left-right direction, and the rotary positioning jig is mounted on the branches.

7. The appearance inspection mechanism for middle frames of mobile phones according to claim 6, wherein said rotary positioning fixture comprises a motor, a synchronous pulley belt, a rotating shaft and a second positioning fixture, wherein said motor is fixedly installed on said fork and its output shaft extends upward out of said fork; the synchronous belt is arranged on an output shaft of the motor and the rotating shaft, and the rotating shaft is arranged on the fork through a bearing; the second positioning jig is fixedly connected to the rotating shaft.

8. The mechanism for detecting the appearance of a middle frame of a mobile phone according to claim 1, wherein the camera array comprises an upper camera, a middle camera and a lower camera, the upper camera is used for shooting the upper edges of the R corner and the straight edge of the middle frame of the mobile phone, the middle camera is used for shooting the middle area of the R corner and the straight edge of the middle frame of the mobile phone, and the lower camera is used for shooting the lower edges of the R corner and the straight edge of the middle frame of the mobile phone.

9. The appearance inspection mechanism for a middle frame of a cellular phone according to claim 8, wherein the light source array includes a first light source and a second light source, the first light source irradiates the rim of the middle frame of the cellular phone from top to bottom, and the second light source horizontally irradiates the rim of the middle frame of the cellular phone from the side.

10. The mechanism of claim 1, wherein the cabinet is provided with a dust shield, and the FFU is mounted on the dust shield.