The Research Of Rolling-wheel-measuring-head Calibration Method For The Measuring System Of Large Diameter

This dissertation is topic from measures for national defense"tenth five-year plan"key project:"the research of high accurate large diameter measurement system by using multi-rolling wheels". Now, the rolling-wheel method is a good way to measure the large diameter. Measure the large work piece's diameter using the rolling-wheel method will lead large diameter measuring error cause the error from rolling-wheel's diameter error, form error, round grating characterization error, round grating install error. This paper's assignment is that research on high-precision calibration method, design dedicated calibration devices, to calibrate rolling-wheel's actual perimeter and calibrate arc length changes which correspond to small angle changes cause by rolling-wheel's diameter error, form error, round grating characterization error, round grating install error. In order to improve the accuracy of rolling-wheel method in measuring large diameter.The design of measuring system mainly has three major parts: the research of high accuracy calibration method for rolling-wheel; design of calibration device's mechanical frame; design of measurement and control circuit. Point to the characteristics of rolling-wheel, research the calibrating method, write the signal acquisition and analysis software, to verify the feasibility of calibration method through the simulation test. Design the test equipment based on the calibration method, mainly include quasi-piece system and the movement drive system, realize the force balance and zero Abbe-error, in order to protect the calibration's accuracy. Design of measurement and control circuit can get the signals from rolling-wheel in real-time, control the motor drive and meet the speed and capacity request, to finish the calibration.