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CCD recognition-based PCB printing machine vision detection method and system

A machine vision inspection, PCB board technology, applied in the direction of printed circuit, printed circuit manufacturing, printed circuit secondary processing, etc., can solve problems such as affecting printing accuracy, and achieve the effect of reducing movement adjustment, high precision, and cost reduction

Active Publication Date: 2019-09-06
CHANGCHUN NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General CCD image recognition and positioning methods cannot realize accurate identification and positioning of PCB boards and solder joints, which affects the printing accuracy

Method used

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  • CCD recognition-based PCB printing machine vision detection method and system
  • CCD recognition-based PCB printing machine vision detection method and system
  • CCD recognition-based PCB printing machine vision detection method and system

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] This embodiment provides a PCB printing machine vision detection method based on CCD recognition, see the attached figure 1 The public flow chart includes the following steps:

[0038] S1. Obtain and store the layout template, including the origin coordinates of the layout template, the position coordinates of each solder area on the layout template, and the initial printing point coordinates;

[0039] S2. Obtain the image data of the PCB board to be p...

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Abstract

The invention discloses a CCD recognition-based PCB printing machine vision detection method and system. The vision detection system comprises an illumination device, a CCD camera, and an image acquisition card and an industrial personal computer electrically connected with the CCD camera in sequence, the CCD camera is used for acquiring an image of the PCB; the image acquisition card is used forprocessing the image of the PCB and storing an obtained data signal into the industrial personal computer; the industrial personal computer obtains the position coordinates corresponding to the origincoordinates, and the initial printing position coordinates of the PCB to be printed according to the image of the PCB, and welding spot image data of the after-welding PCB; and the industrial personal computer is used for comparing the obtained coordinates with the corresponding coordinates of a pattern template to carry out error judgment, and carrying out two-time correction control on a pattern template and the welded PCB. According to the system, the printing dislocation rate of a workpiece is evaluated in multiple aspects, so that the dislocation degree of soldering tin can be accuratelymastered, and the method has higher precision.

Description

technical field [0001] The invention relates to the technical field of CCD image recognition, in particular to a PCB printing machine vision detection method and system based on CCD recognition. Background technique [0002] In the solder printing process for mounting electronic components on a printed circuit board, first, cream solder is printed on a predetermined electrode pattern provided on the printed circuit board, and on the printed circuit board on which the cream solder is printed, according to the Adhesive, temporarily holds electronic components. Then, the above-mentioned printed circuit board is guided to a reflow furnace, and soldering is performed through a predetermined reflow process. Many screen printing and traditional solder paste dispensing machines have limitations in speed and quality, and there are risks of manufacturing errors, expansion and contraction over time, etc. It is difficult for the position of the solder on the printed circuit board to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/22
CPCH05K3/225H05K2203/163
Inventor 任峰杨树臣李悦张凤涛王锐孙立巍吴迪赵洁婷
Owner CHANGCHUN NORMAL UNIVERSITY