Micro-drilling machine vision inspection system and its method

Abstract

The invention discloses a micro-drilling machine vision detection system and a method thereof in the technical field of quality detection. The detection system includes: a four-station indexing and rotating platform, a side detection system, a blade surface detection system, a PLC and a computer; the detection steps are as follows: : First, the side detection system and the blade surface detection system are calibrated before detection, then the side image is collected and processed, then the blade surface image is collected and the blade surface image is processed, and finally the micro drills to be inspected are classified according to the detection results deal with. The invention divides micro-drill detection into side detection and blade surface detection, and integrates these two detections into one system. By improving the clarity and accuracy of collected images and combining multiple processing methods for collected images, the The detection accuracy and detection speed of the micro-drill are improved, and the detection range is expanded.

Description

technical field [0001] The invention relates to a device and a method in the technical field of quality inspection, in particular to a micro-drilling machine vision inspection system and a method thereof. Background technique [0002] PCB (printed circuit board) micro-drills (referred to as micro-drills) are the main tools for processing PCBs, which have an important impact on the quality and cost of PCBs. As people's demand for highly integrated PCBs continues to increase, the diameter of micro-drills is also decreasing. The traditional inspection method of micro-drilling generally uses laser caliper and microscope, but the laser caliper can detect a single item, which cannot meet the requirements of many inspection items for micro-drilling in production; the microscope method is manual measurement, which is greatly affected by human factors. Can not meet the needs of mass production. [0003] After searching the literature of the prior art, it is found that the applicati...

AI Technical Summary

Problems solved by technology

The traditional inspection method of micro-drilling generally uses laser caliper and microscope, but the laser caliper can detect a single item, which cannot meet the requirements of many inspection items for micro-drilling in production; the microscope method is manual measurement, which is greatly affected by human factors. Unable to meet the needs of mass production

[0003] After searching the literature of the prior art, it is found that the application of Chinese Patent Publication No. CN02242702.3 provides a micro-drill detection and imaging device. The device manually adjusts the intensity and position of the light source, and selects a better imaging device based on engineering experience. The effect can further meet the requirements of improving the imaging quality, so errors are easy to occur, and the detection efficiency is low

At the same time, this method lacks an effective detection method for the geometric parameters of the side of the micro-drill, and it cannot perform side detection and edge detection at the same time, and the degree of system integration is relatively low.

[0004] After searching, it was found that Luo Ying from the University of Electronic Science and Technology of China provided a visual processing method for micro-drill detection in her master's thesis titled "Research on PCB Micro-drill End-face Defect Detection Based on Machine Vision", but this method detects The efficiency and accuracy are relatively low, and there are relatively few detectable parameters.

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