The theory model establishment and experiment measure of Lidar ranging signal in large incident angle condition

Bai Ning; Jiancheng Lai; Chunyong Wang; Wei Yan; Yunjing Ji; Zhenhua Li

doi:10.1117/12.2504930

18 January 2019 The theory model establishment and experiment measure of Lidar ranging signal in large incident angle condition

Bai Ning, Jiancheng Lai, Chunyong Wang, Wei Yan, Yunjing Ji, Zhenhua Li

Author Affiliations +

Proceedings Volume 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 108390K (2019) https://doi.org/10.1117/12.2504930
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Recently, with the rapid development of unmanned vehicles, When laser radar is used in road graphing of unmanned vehicles, due to the height limitation of the vehicle, the angle between the detection axis of the laser radar and the normal line of the road surface is large, and the probe beam is in a grazing incidence state, which is close to the normal incidence of the conventional laser radar. There is a big difference in detection imaging. This difference has a crucial impact on the rangefinder imaging capabilities of Laser Radar, but to best of the authors’ knowledge, there has not been any papers published studying with this particular working condition. In this paper, we are the first to establish the simulation model of the laser radar ranging signal based on the principle of light transmission delay, and obtains the influence curve of laser oblique incidence, road roughness, and pit package on the laser echo waveform by numerical calculation. Based on this, an experimental system for testing the ranging signal of the laser radar at high angle incidence conditions was established on the prototype of a single-line laser radar, and the laser echo waveforms under different incident angles and road surface conditions were tested. The curves in the numerical analysis have a good consistency, which verifies the correctness of the theoretical model. In addition, it shows that the model we proposed is an effective tool for quantitatively analyzing the influence of pavement characteristics on the laser echo signal under large-angle incident conditions.

Citation Download Citation

Bai Ning, Jiancheng Lai, Chunyong Wang, Wei Yan, Yunjing Ji, and Zhenhua Li "The theory model establishment and experiment measure of Lidar ranging signal in large incident angle condition", Proc. SPIE 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 108390K (18 January 2019); https://doi.org/10.1117/12.2504930

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KEYWORDS

LIDAR

Pulsed laser operation

Roads

Laser scattering

Optical simulations

Prototyping

Ranging

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