Study of PCB micro-drilling geometry detection method based on machine vision

摘要

Traditional methods rely on for measuring tools in the machine detection of PCB micro drill have limitations, for example, labor-intensive, poor stability, low efficiency and so on. This paper proposes a detection method for machine vision and image feature extraction, and achieves non-contact, high-precision online/offline automatic measurement of geometry of PCB micro-drilling. The simulation and experimental results show that this method is simple, feasible and able to quickly and accurately measure the PCB micro-drilling. It's up to 1μm and can also be used for dimensional inspection of other small parts. This has great practical value.