Research of high range resolution lidar system

Qiao Wang; Xiao-ping Du; Ji-guang Zhao

doi:10.1117/12.901008

22 August 2011 Research of high range resolution lidar system

Qiao Wang, Xiao-ping Du, Ji-guang Zhao

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81923R (2011) https://doi.org/10.1117/12.901008
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Lidar system often use pulse range method, phase detection (PD) range method and linear frequency modulation continues wave (LFM/CW) range method. Each method has its limit between range resolution and no fuzzy range. In this paper, a Lidar system with high range resolution in a long distance is designed by using LFM/CW range method cooperating with PD range method. A MCU is used to control the system working on LFM/CW range mode and PD range mode alternately. In which LFM/CW range mode is used to obtain an approximate target range with low resolution in long distance, and PD range mode is used to obtain a high resolution range value within one resolution of LFM/CW range mode. Then use the PD mode's range value to amend the range from LFM/CW method, and achieve high range resolution in long distance. This paper describes the system's principle. The simulation and experiment results in typical object situation prove the system could achieve high range resolution effectively.

Citation Download Citation

Qiao Wang, Xiao-ping Du, and Ji-guang Zhao "Research of high range resolution lidar system", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81923R (22 August 2011); https://doi.org/10.1117/12.901008

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KEYWORDS

LIDAR

Modulation

Signal to noise ratio

Control systems

Signal generators

Phase shift keying

Semiconductor lasers

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