Adaptive sampling method for laser measuring free-form surface

被引:1
|
作者
Jun Hu
Ye Li
Yuhan Wang
Jianguo Cai
机构
[1] Shanghai Jiao Tong University,School of Mechanical Engineering
关键词
Equal arc-length; Extrapolation; Free-form surface; Sampling; Spline curve ;
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中图分类号
学科分类号
摘要
In order to achieve high accuracy in the laser measuring of free-form surfaces, equal step-length sampling usually involves much more measurement data than necessary. An equal arc-length sampling method based on tangent extrapolation of cubic spline curves is introduced to solve this problem. By this method, step-length is adjusted adaptively according to the slope variation of the sampled curve with arc-length maintained to be constant, thus the small slope region is sampled sparsely while the large slope region is sampled densely. Sampling simulation of a typical surface proves that the data amount of equal arc-length sampling is much less than that of equal step-length sampling under the same circumstance.
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收藏
页码:886 / 890
页数:4
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