Photo-Electronic Measuring System Of Inner Diameter Of The Shell

The thesis is mainly about the noncontact photo-electronic measuring system of inner diameter of the shells whose calibers are from 30mm to 155mm.On the basis of optical triangulation measuring principle, the emphasis of the thesis is to investigate the weak signal measuring method of inner diameter employing the PSD. The system is of the controlling structure of subordinate two-poles microprocessor. The main controller is in charge of managing, communicating and the measuring of grating-displacement and angle-displacement. The subcontrollcr is in charge of the measuring of inner diameter of PSD, the analog-to-digital converting of the serial A/D and the data processing of DSP. The value of the shells inner diameter is sent into the data memory of the main controller whose core is the AVR high-speed embedded single-chip microcomputer and is displayed at last. During the course of measuring, the dialogue between the human being and the computer can be realized by the keyboard.