Optical design of a laser distance measuring system based on high frequency digital phase detection
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1.
College of Information and Communication Engineering, North University of China, Taiyuan 030051, China;
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2.
Software Engineering and Testing Center, China North Industries Group Corporation, Beijing 100089, China
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Corresponding author:
LI Yong-hong, liyh@kotelmems.com
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Received Date:
2012-09-11
Accepted Date:
2012-12-12
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Abstract
In order to improve the precision of phase-shift measurement,a kind of high frequency phase method,laser distance measuring system based on high frequency digital detection,was used to improve the measurement precision instead of the analog phase measurement.10MHz laser modulation frequency and the design of digital phase detector were achieved.The collimator lens was designed and the design specifications was listed.Comparative analysis was made before and after beam collimation with ZEMAX.The feasibility of the optical system was verified by the experiments.The maximum standard deviation is 0.12°,and the distance precision can be improved to about 1mm.In addition,the maximum error is 0.09°,while the minimum is 0.011°.These resucts show that the system meets the requirement of accuracy and achieves the purpose of improving the accuracy.
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References
|
[1]
|
XU J Q.Design of phase-shift laser ranging device[D].Shanghai:Shanghai Jiaotong University,2010:56-58(in Chinese). |
|
[2]
|
BOLOTINA O V,MEDVEDS'KYI M M.Some results of investigating the stability of operation of the ukrainian laser ranging stations[J].Earth's Rotation and Geodynamics,2007,23(1):11-17. |
|
[3]
|
AREV N N,GORBUNOV B F,PUGACHEV G V.Application of a laser ranging system to the metrologic certification of satellite radar measurement systems[J].Measurement Techniques,1993, 36(5):524-525. |
|
[4]
|
WANG Ch Y,XIE J,BIAN B M.Optimum signal threshold ratio for improving the ranging accuracy of lidar[J].Laser Technology,2007,31(4):408-411(in Chinese). |
|
[5]
|
JIN N,WANG W,WENG J F.The design of the circuit system used for phase laser range finder[J].Journal of Optoelectronics·Laser,2001,12(8):864-867(in Chinese). |
|
[6]
|
TSINGHUA UNIVERSITY SURVEY TEACHING AND RESEARCH GROUP.Application of short geodimeter and laser position indicator[M].Beijing:People's Education Press,1980:245-246(in Chinese). |
|
[7]
|
JOURNET M B.High-resolution laser rangefinder based on a phase-shift measurement method[J].SPIE,1998,3520:123-132. |
|
[8]
|
AMANN M C,LESCURE T B M, MYLLYLA R,et al.Laser ranging:a critical review of usual techniques for distance measurement[J].Optical Engineering,2001,40(1):10-19. |
|
[9]
|
LIU M,YANG X Y,LIU Ch J.Phase shift laser range finding with a novel quadrature modulation method and system implementation[J].Chinese Journal of Lasers,2012,39(2):0208004(in Chinese). |
|
[10]
|
SUN Zh W,LIU Y J.Design of a new performance testing instrument of laser rangefinders[J].Laser Technology,2011,35(6):138-141(in Chinese). |
|
[11]
|
SUN Y,ZHANG K Sh.Design and implementation of simulation system for phase-shift laser rangefinder[J].Computer Simulation,2012,29(1):361-363(in Chinese). |
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