Abstract: At present, the dynamic response characteristics of the high-speed solenoid valve for knitting machinery cannot be quantitatively tested. In this paper, a testing system for high-speed solenoid valve of knitting machinery is designed, which can be applied in the quantitative determination of dynamic response characteristics and electrical parameters of high-speed solenoid valve (e.g. solenoid valve for needle selecting). The system, which is designed based on virtual instrument, consists of the general-purpose computer, data acquisition card and customized testing platform. The high-speed data acquisition technology and non-contact measurement methods based on machine vision are utilized in this system. Proper software design is also taken into account to guarantee the functionality of the system. Experimental results indicate that the system can effectively measure the dynamic response characteristics and electrical parameters of the high-speed solenoid valve for knitting machinery.

Key words: knitting machinery, solenoid valve, virtual instrument, machine vision