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Dechlorination pathways of diverse chlorinated aromatic pollutants conducted by Dehalococcoides sp. strain CBDB1 期刊论文  OAI收割
Science of The Total Environment, 2010, 卷号: 408, 期号: 12, 页码: 2549-2554
作者:  
Gui-Ning Lu;  Xue-Qin Tao;  Weilin Huang;  Zhi Dang;  Zhong Li;  Cong-Qiang Liu
  |  收藏  |  浏览/下载:29/0  |  提交时间:2019/08/28
Three-dimensional angle measurement based on auto-collimation and moire fringe (EI CONFERENCE) 会议论文  OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Cai S.; Liang S.; Qiao Y.-F.
收藏  |  浏览/下载:35/0  |  提交时间:2013/03/25
A method for small three-dimensional (3D) angle measurement based on auto-collimation and moire fringe is proposed and analyzed. A right-angle prism is used as the indicator of angle change. The inclined plane indicates the pitch and yaw angles and roll angle in indicated by the rib which is the intersection of two right-angle sides. Pitch and yaw angles measurement are implemented by auto-collimation based on reticule and roll angle measurement is measured based on moire fringe. Roll angle measurement is separated from pitch and yaw by using two light sources with different frequencies. Any small change of pitch and roll angles will induce the shift of the reticule image after reflecting by inclined plane. And any small roll angle will induce a change in moire fringe width that is generated by scale grating image which is reflected by the prism and index grating. The math model of this method is built up and error analysis is presented. The theoretical calculation results show that the proposed method is feasible and can achieve high accuracy. 2009 SPIE.