Affiliation:
1. Department of Electrical Engineering, National Chun Hsing University, Taichung 402, Taiwan
2. Graduate Institute of Optoelectronic Engineering, National Chun Hsing University, Taichung 402, Taiwan
Abstract
A new scheme presents MEMS-based LiDAR with synchronized dual-laser beams for detection range enhancement and precise point-cloud data without using higher laser power. The novel MEMS-based LiDAR module uses the principal laser light to build point-cloud data. In addition, an auxiliary laser light amplifies the single-noise ratio to enhance the detection range. This LiDAR module exhibits the field of view (FOV), angular resolution, and maximum detection distance of 45° (H) × 25° (V), 0.11° (H) × 0.11° (V), and 124 m, respectively. The maximum detection distance is enhanced by 16% from 107 m to 124 m with a laser power of 1 W and an additional auxiliary laser power of 0.355 W. Furthermore, the simulation results show that the maximum detection distance can be up to 300 m with laser power of 8 W and only 6 W if the auxiliary laser light of 2.84 W is used, which is 35.5% of the laser power. This result indicates that the synchronized dual-laser beams can achieve long detection distance and reduce laser power 30%, hence saving on the overall laser system costs. Therefore, the proposed LiDAR module can be applied for a long detection range in autonomous vehicles without requiring higher laser power if it utilizes an auxiliary laser light.
Funder
Ministry of Science and Technology, Taiwan
Reference17 articles.
1. Wang, D., Watkins, C., and Xie, H. (2020). MEMS Mirrors for LiDAR: A Review. Micromachines, 11.
2. MEMS-based lidar for autonomous driving;Yoo;Elektrotech Informat.,2018
3. Analysis of Timing Errors in Time-of-Flight LiDAR Using APDs and SPADs Receivers;Donati;IEEE J. Quantum Electron.,2021
4. System Design and Performance Characterization of a MEMS-Based Laser Scanning Time-of-Flight Sensor Based on a 256 x 64-pixel Single-Photon Imager;Ito;IEEE Photon. J.,2013
5. The Detection of Time-correlated Photons by a Coincidence Counter;Twiss;Aust. J. Phys.,1959