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CN-121755448-B - Appearance detection system and control method thereof

CN121755448BCN 121755448 BCN121755448 BCN 121755448BCN-121755448-B

Abstract

The invention discloses an appearance detection system and a control method thereof. The appearance detection device comprises a third tray arranged at a good product station, a fourth tray arranged at a defective product station, a transfer mechanism, a detection module and a third pickup mechanism. The invention is beneficial to greatly simplifying the structural complexity of the whole machine and reducing the time occupation, thereby being beneficial to improving the efficiency of feeding and appearance detection on the basis of ensuring high accuracy of feeding and appearance detection and finally being beneficial to the detection reliability of the whole appearance detection system.

Inventors

  • Yan Fene

Assignees

  • 昆山倬跃蓝天电子科技有限公司
  • 苏州蓝泽智能科技有限公司

Dates

Publication Date
20260512
Application Date
20260303

Claims (8)

  1. 1. An appearance inspection system, comprising: The machine frame is sequentially provided with a material preparation station, a material loading station, a material discharging station, a good product station and a defective product station, wherein the material preparation station is arranged adjacent to the material loading station, and the good product station and the defective product station are respectively arranged adjacent to the material discharging station; The feeding device comprises a first tray arranged at the material preparation station, a second tray arranged at the material loading station, a first pickup mechanism and a positioning module, wherein the first tray is used for freely placing sheet materials, the positioning module is arranged at the moving path of the first pickup mechanism and is used for carrying out azimuth measurement on the sheet materials at the position, the first pickup mechanism is used for regularly placing the sheet materials at the first tray at the second tray according to the measurement data of the positioning module, and The appearance detection device comprises a third tray arranged at the good product station, a fourth tray arranged at the defective product station, a transfer mechanism, a detection module and a third pickup mechanism, wherein the transfer mechanism is used for transferring the second tray from the feeding station to the discharging station, the detection module is arranged at the moving path of the transfer mechanism and is used for carrying out appearance detection on at least two outer end surfaces of the passing sheet materials, and the third pickup mechanism is used for respectively transferring the sheet materials at the second tray to the third tray or the fourth tray according to the detection data of the detection module; wherein, the location module includes: A first imaging device suspended above the material preparation station and having an imaging surface facing downward, the first imaging device being configured to capture first image information in the first tray for the first pick-up mechanism to pick up sheet material from the first tray according to the first image information, and The second imaging device is arranged at the area between the material preparation station and the material loading station, the imaging surface of the second imaging device faces upwards, and the second imaging device is used for capturing second image information of the first pickup mechanism and the sheet materials picked up by the first pickup mechanism so that the first pickup mechanism can place the sheet materials in the second tray according to the second image information; The detection module comprises: A third imaging device suspended above the transfer mechanism with its imaging surface facing downward for capturing third image information of the top surface of the sheet material in the second tray, and And a fourth imaging device with an imaging surface facing upwards, the fourth imaging device being configured to capture fourth image information of a bottom end surface of the sheet material in the second tray.
  2. 2. The appearance inspection system of claim 1 wherein said loading stations and said unloading stations are arranged in groups to form transfer groups, said transfer groups being arranged side by side with at least two, said transfer mechanisms being arranged in a one-to-one correspondence with each of said transfer groups with at least two; Each transfer mechanism synchronously operates, or Each transfer mechanism alternately operates in a staggered way.
  3. 3. The appearance inspection system according to claim 1, wherein the loading stations and the unloading stations are arranged in groups to form a transfer group, at least two transfer groups are arranged side by side, the transfer mechanisms are arranged in a one-to-one correspondence manner, at least two transfer groups are arranged, the third imaging device is movably arranged along the arrangement direction of the transfer groups, and/or at least two third imaging devices are arranged along the extension direction of the transfer groups, The fourth imaging device is arranged at the moving path of the third picking mechanism, and is used for capturing the fourth image information of the passing sheet material after the sheet material is moved out of the second tray and suspended by the third picking mechanism.
  4. 4. The appearance inspection system of claim 1 wherein the frame includes a chassis and a support frame suspended above the chassis, the support frame defining the stock station, the loading station, the good station, and the defective station; The appearance detection system further includes a lifting mechanism, the lifting mechanism including: The lifting platform is arranged corresponding to the material preparation station, the material loading station, the good product station and/or the defective product station, and is vertically and reciprocally movably arranged on the underframe, and is used for driving the corresponding tray to move upwards into or downwards out of the corresponding station, and The objective table is arranged for the corresponding tray, the objective table is in the bottom side of the tray is penetrated to form and is dodged the through-hole, dodge the through-hole and run through along the border of objective table, the objective table is along the movable setting of horizontal direction, so as to can be towards the elevating platform moves to make the elevating platform inserts dodge in the through-hole, and after the elevating platform shifts out the corresponding station, the objective table can be moved out towards deviating from the direction of elevating platform.
  5. 5. The visual inspection system of claim 1, further comprising a sensor device selectively positionable in a path of movement of the sheet material and configured to trigger a sensed signal upon sensing that the first tray, the second tray, the third tray, the fourth tray, and/or the sheet material are in place at the location.
  6. 6. The appearance inspection system of claim 1 wherein the feeding device further comprises a discrete mechanism disposed at the stock preparation station and connected to the first tray, the discrete mechanism being configured to act on the first tray prior to operation of the first imaging device to cause the sheet materials in the first tray to separate from one another.
  7. 7. A control method of the appearance detection system according to any one of claims 1 to 6, comprising: After confirming that the first tray is positioned in place at the material preparation station, acquiring first image information in the first tray based on the first imaging device; forming a pickup path according to the first image information, and controlling a first pickup mechanism to pick up a sheet material from the first tray according to the pickup path; acquiring second image information at the first pick-up mechanism moving past based on the second imaging device; Forming an adjustment scheme according to the second image information, and controlling the first pickup mechanism to move the sheet material into a second tray according to the adjustment scheme; The control transfer mechanism drives the second tray to transfer from the feeding station to the discharging station, and controls the corresponding detection module to detect the outer surface of the flaky materials in the second tray when moving through the detection module, so as to obtain corresponding detection data; and controlling a third pickup mechanism to transfer the sheet materials with the detection data meeting the preset detection rules to a third tray and transfer the sheet materials with the detection data not meeting the preset detection rules to a fourth tray.
  8. 8. The method of controlling an appearance inspection system of claim 7, wherein the step of controlling the first pick-up mechanism to move sheet material into a second tray according to the adjustment scheme comprises: adjusting the picking path according to the adjustment scheme and controlling the first picking mechanism to move the sheet material into the second tray according to the adjusted picking path, and/or, Adjusting the posture of the flaky material according to the adjusting scheme, controlling the first picking mechanism to move the adjusted flaky material into the second tray, and/or, And confirming whether the sheet materials are picked up in place according to the adjustment scheme, and controlling the first pickup mechanism to move the sheet materials into the second tray after confirming that the sheet materials are picked up in place.

Description

Appearance detection system and control method thereof Technical Field The invention relates to the technical field of appearance detection of sheet materials, in particular to an appearance detection system and a control method thereof. Background Sheet materials such as circuit boards (PCB/PCBA) are inevitably subjected to appearance inspection during their processing. Appearance detection of a circuit board is a core link of electronic manufacturing quality control. The core aim is to identify three major problems of surface defects, abnormal structures and assembly errors, and cover the whole process from bare board manufacture to finished product assembly. Especially when the size of sheet material is less, or need to carry out multiple outward appearance to a plurality of sheet materials in batches and examine, if there is the accuracy demand, prior art generally needs in the material loading stage of sheet material, spends more efforts regularly arrange the sheet material in the tray, then still need carry out strict design to the position etc. of tray at the later stage to calibrate the position of sheet material. This tends to cause the circulation rhythm of the sheet material to be slow, and the overall detection efficiency to be low. Disclosure of Invention The invention mainly aims to provide an appearance detection system and a control method thereof, and aims to solve the problem that the existing appearance detection efficiency for sheet materials is low. In order to achieve the above object, the present invention provides an appearance detection system, comprising: The machine frame is sequentially provided with a material preparation station, a material loading station, a material discharging station, a good product station and a defective product station, wherein the material preparation station is arranged adjacent to the material loading station, and the good product station and the defective product station are respectively arranged adjacent to the material discharging station; The feeding device comprises a first tray arranged at the material preparation station, a second tray arranged at the material loading station, a first pickup mechanism and a positioning module, wherein the first tray is used for freely placing sheet materials, the positioning module is arranged at the moving path of the first pickup mechanism and is used for carrying out azimuth measurement on the sheet materials at the position, the first pickup mechanism is used for regularly placing the sheet materials at the first tray at the second tray according to the measurement data of the positioning module, and The appearance detection device comprises a third tray arranged at the good product station, a fourth tray arranged at the defective product station, a transfer mechanism, a detection module and a third pickup mechanism, wherein the transfer mechanism is used for transferring the second tray from the feeding station to the discharging station, the detection module is arranged at the moving path of the transfer mechanism and is used for carrying out appearance detection on at least two outer end surfaces of the passing sheet materials, and the third pickup mechanism is used for transferring the sheet materials at the second tray to the third tray or the fourth tray respectively according to detection data of the detection module. Optionally, the positioning module includes: A first imaging device suspended above the material preparation station and having an imaging surface facing downward, the first imaging device being configured to capture first image information in the first tray for the first pick-up mechanism to pick up sheet material from the first tray according to the first image information, and The second imaging device is arranged at the position of the area between the material preparation station and the material loading station, the imaging surface of the second imaging device faces upwards, and the second imaging device is used for capturing second image information of the first pickup mechanism and the sheet materials picked up by the first pickup mechanism so that the first pickup mechanism can place the sheet materials in the second tray according to the second image information. Optionally, the feeding stations and the discharging stations are arranged in groups to form transfer groups, at least two transfer groups are arranged side by side, and the transfer mechanisms are provided with at least two transfer groups in one-to-one correspondence; Each transfer mechanism synchronously operates, or Each transfer mechanism alternately operates in a staggered way. Optionally, the detection module includes: A third imaging device suspended above the transfer mechanism with its imaging surface facing downward for capturing third image information of the top surface of the sheet material in the second tray, and And a fourth imaging device with an imaging surface facing upwards, the fourth imaging devi