A roll angle measurement method based on dual CCDs
Author(s): LV Yong, SUN Peng, LIU Lishuang, GEN Rui, HAO Wenxia, MA Bin, School of Instrumentation Scienc & Optoelectronics Engineering, Beijing Information Science & Technology University
Pages: 477-480
Year: 2013 Issue: 5
Journal: Optical Technique
Keyword: optical measurement; roll angle; collimated beams;
Abstract: A roll angle measurement method based on dual CCDs(Charge Coupled Devices)is presented.The system consists of two parts.Moving part is two CCDs that are connected together by a link rod;it is fixed and moved along with the measured object.Fixed part is composed of a light source,an optical switch and two optical collimators.Two collimated beams from fixed part project on two CCDs respectively.Roll motion of the measured object leads to the position change of two light spots on the CCDs.An algorithm is programmed to recalculate the roll motion of the measured object based on position change.The MATLAB simulation verifies that the accuracy of the roll angle measurement is not influenced by three translational motions of the measured object.It is influenced by changes of pitch and yaw,but the error is less than 1″in the whole range of 200″.A roll angle measurement experiment system is built and experimental test is carried out.Comparing to the result of HP5529Asystem,in the range of 1000″,the maximum error of the roll angle measurement system is 1.5″.
Pages: 477-480
Year: 2013 Issue: 5
Journal: Optical Technique
Keyword: optical measurement; roll angle; collimated beams;
Abstract: A roll angle measurement method based on dual CCDs(Charge Coupled Devices)is presented.The system consists of two parts.Moving part is two CCDs that are connected together by a link rod;it is fixed and moved along with the measured object.Fixed part is composed of a light source,an optical switch and two optical collimators.Two collimated beams from fixed part project on two CCDs respectively.Roll motion of the measured object leads to the position change of two light spots on the CCDs.An algorithm is programmed to recalculate the roll motion of the measured object based on position change.The MATLAB simulation verifies that the accuracy of the roll angle measurement is not influenced by three translational motions of the measured object.It is influenced by changes of pitch and yaw,but the error is less than 1″in the whole range of 200″.A roll angle measurement experiment system is built and experimental test is carried out.Comparing to the result of HP5529Asystem,in the range of 1000″,the maximum error of the roll angle measurement system is 1.5″.
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