An Automatic Detection and Sorting System for Valve Core Based on Machine Vision

The air-conditioning energy consumption will indirectly be affected by the machining accuracy of the valve core in throttle valve used to control refrigerant, so each valve core needs to be tested for its intermediate aperture before leaving the factory. Moreover, the repeatability of the general electronic pneumatic measuring instrument cannot meet the requirements. This paper introduces an automatic detection system of the valve core aperture based on machine vision, which is mainly composed of mechanical movement part, visual part, and control part. The system is based on a method of measuring the valve core aperture by pneumatic measuring instrument, and automatically discriminates the values of pneumatic measuring instrument and barometer by machine vision. Then, the system cooperates with mechanical movement part to complete valve core loading and automatic sorting, thus realizing online automatic detection and sorting of the micro-apertures of the air-conditioning valve core. The experimental results show that the online detection system meets the production requirements of enterprises.