Design Of Mechatronics Control System Of Auto Digital Lensmeter

The Auto Lensmeter uses optic theory, motor technology, CCD technology and DSP technology. It realizes automatization, high precision and function diversification.By comparison and analysis of the Auto Lensmeter used in domestic and abroad, optics theory and foci adjustment method are discussed, the formulation of diopter of glasses is given. The control system of Auto Lensmeter is designed, including the drive circuit and restoration circuit of step-motor. The corresponding software is designed and debugged for step-motor based on the control principle of DSP. The hardware circuit is designed for the system, including the power module, clock circuit module and JTAG interface. CCD is introduced, the sequential pulse generator and signal magnify circuit are designed. In the end, some solutions used for EMC are introduced for high speed board design.The auto lensmeter has completed debugging work using the board on the base of current optics system. It can make the high accurate measure. The work of the article establishs a foundation for the further development.