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Calibration system of coaxiality measurement device about big distance of porous parts

Published:2015-06-08 author:GONG Xing，ZHAO Zhuan-ping，WANG Bo Browse: 3226 Check PDF documents

Calibration system of coaxiality measurement device about

big distance of porous parts

GONG Xing，ZHAO Zhuan-ping，WANG Bo

（College of Mechanical and Electrical Engineering，Nanjing University of Aeronautics and Astronautics，

Nanjing 210016，China）

Abstract：Aiming at the precision calibration problems of coaxiality measurement device about big distance of porous parts，the coaxiality

error sources，measurement methods for porous parts，error calculation models were researched，the principle and constitution of

calibration system were summarized，the calibration system structure and control model were established. A special coaxiality method was

proposed to provide a group of standard porous parts simulator whose coaxiality is known. The actual value acquired by the coaxiality

measurement device was compared with the standard value to get the measurement error. This calibration system consisted of threedimensional

precision motion platform and ring gauge，the grating ruler was selected to measure the displacement，and TMS320F2812 was

selected as the system control chip，the minimal region algorithm based on the least square principle was proposed to calculate the

coaxiality of standard porous parts. The results indicate that this system resolution can reach 1 μm and the uncertainty can reach 8.12 μm，

and it can effectively calibrate the precision error of coaxiality measurement device.

Key words：calibration；coaxiality；precision motion platform；minimal region algorithm

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