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Analysis of measuring curved surface roughness method based on oblique laser scattering style

Published:2015-02-12 author:CHEN Guo，YE Ming Browse: 2676 Check PDF documents

Analysis of measuring curved surface roughness method based on

oblique laser scattering style

CHEN Guo，YE Ming

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

Nanjing 210016，China）

Abstract：Aiming at the problems of roughness measuring on curved surface in narrow space，the relationship between the measurement voltage value and the curved surface roughness was researched，and a roughness measuring system based on oblique laser scattering style

was proposed. Through the experiments，the relationship among the parameters of the measurement voltage value，the incident angle of the laser，the distance between probe and target surface and the curvature of measured surface was established. And through the calibration experiment，the characteristic curve between the roughness value and the measurement voltage value was obtained，and the

curve is monotone and coincides with the result of theoretical analysis. At last，roughness measurement experiments were carried out by using the test rig. The results indicate that the proposed method is certain feasible，and the measurement error could be controlled below5% compared with the stylus method，it can achieve the requirement of measuring the curved surface roughness in narrow space。

Key words：narrow space；curve surface；roughness；oblique laser scattering

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