Automatic PCB optical detection method

Abstract

An automatic PCB optical detection method comprises the steps: an output end of a development, etching and film removal production line is arranged on an online optical inspection device; an etching plate is transmitted to scanning areas of digital cameras by a transmission mechanism, and the digital cameras are arranged above and below the etching plate; when the etching plate is transmitted in the scanning areas of the digital cameras, the digital cameras above and below the etching plate simultaneously shoot an upper plate face and a lower plate face of the etching plate, shot images are compared and identified in a grayscale mode and original data, abnormal points are found out, and recording is carried out with each etching plate as a unit; a code spraying device is arranged at the rear of the scanning areas of the digital cameras, when the etching plate is transmitted to the code spraying device, a code is sprayed on the plate edge of the etching plate by the code spraying device, at the same time, an operation host treats the scanning information of the etching plate. The integrated detection is achieved, positioning of defects is accurate, feedback is in time, the production time is shortened, the phenomenon of oxidation false points is avoided, the working efficiency is improved, and the finished product quality is improved.

Description

technical field [0001] The invention relates to optical detection of PCB boards, in particular to an automatic optical detection method of PCB boards. Background technique [0002] PCB board, also known as printed circuit board, printed circuit board, referred to as printed board, is based on an insulating board, cut to a certain size, with at least one conductive pattern attached to it, and holes (such as component holes, fastening holes, metallized holes, etc.), and realize the interconnection between electronic components. Since such boards are made using electronic printing, they are called "printed" circuit boards. This kind of circuit board requires optical inspection of the circuit board during the production process to ensure control of defective products. [0003] At present, the commonly used optical inspection mode is a separate optical inspection machine, and the maintenance process is DES, board collection, transfer, off-line optical inspection, transfer and V...

AI Technical Summary

Problems solved by technology

This operation method requires high labor costs and low efficiency, and it is easy to cause quality defects such as scratches on the board surface and oxidized false spots during the transfer process; in addition, after positioning occurs during the production process, the feedback is not timely, and it is easy to cause batch scrapping or repairs , resulting in an increase in production and labor costs

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