Surface measurement methods based on single and multi-frequency fringes and its applications in reverse engineering
The 3D surface measurement methods are described based on the single and multi-frame fringe projection principles, respectively. The key algorithm — phase reconstructing (PR) is conducted by means of two different concepts; one is the single-frequency spatial phase reconstructing method and the other is the multi-frequency temporal one. On the side of spatial PR, a few typical methods are carried out, among which the most robust one could be achieved. The described spatial methods are implemented under the guide of the suggested modulation gradient variance (MGV) map. Moreover, the network programming (NP) method is also conducted to compare with them. The tested results show that the weighted least square (WLS) is the most robust one among the spatial PR methods. At the same time, the temporal PR method is introduced based on the multi-frequency fringes, and the result proves that it features the better noise immunity and robustness than spatial ones, but needs many different frequencies of fringes that wou d be more time-consuming. Lastly, the surfaces are reconstructed in reverse engineering (RE) software.
surface measurement multi-frequency fringe phase reconstructing
Yongjian Zhu Jingxin Na Jianfeng Sun Shaohui Yin
College of Automotive Engineering, Jilin University, Changchun, P.R. China 130012 State Key Laborato College of Automotive Engineering, Jilin University, Changchun, P.R. China 130012 Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Shanghai, P.R.China 2018 State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University,Changsh
国际会议
大连
英文
460-464
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）