Infrared and Laser Engineering, Volume. 51, Issue 8, 20210786(2022)
A design and implementation of full waveform hyperspectral LiDAR for ancient architecture modelling
Figures & Tables(16)
Fig. 1. Schematic representation of spectral-spatial information of HSL
Fig. 6. Schematic of scanning strategy of HSL. (a) Key scanning points of HSL; (b) Scanning trajectories
Fig. 7. Ancient architecture component sample. (a) Single component; (b) Combined component
Fig. 10. 750 nm quantized voltage value distribution of single component
Fig. 11. Distribution of spectral reflectance of different samples
Table 1. System design criterion of HSL
View tableView in ArticleTable 1. System design criterion of HSL
Item Parameter Output mode Mode 1: Supercontinuum spectrum direct output Mode 2: Monochromatic light turntable output Spectral range/nm 550-1050 Spectral resolution/nm 5 Co-efficiency of AOTF crystal diffraction >80% Output efficiency >40% Monopulse energy >8 Divergence angle of light spot/mrad ~0.35 Collimator focal length 33
Table 2. SNR test results
View tableView in ArticleTable 2. SNR test results
SNR under different reflectance Reflectance 20% 30% 40% 50% 60% 70% SNR 15.758 16.546 16.021 16.113 16.108 16.531
Table 3. Test results of horizontal axis rotation accuracy
View tableView in ArticleTable 3. Test results of horizontal axis rotation accuracy
Rated value Encoder returned value Theodolite measured value Bias 25 25°0′2″ 359°25′52″ −24″ 40 40°0′4″ 359°26′06″ −10″ 55 55°0′1″ 359°26′04″ −12″ 70 70°0′2″ 359°26′03″ −13″ 85 85°0′4″ 359°26′16″ 0″ 100 100°0′1″ 359°26′16″ 0″ 115 115°0′2″ 359°26′35″ 19″ 130 130°0′4″ 359°26′49″ 33″ 145 145°0′1″ 359°27′01″ 45″ 130 129°59′54″ 359°26′38″ 22″ 115 114°59′52″ 359°26′21″ 5″ 100 99°59′51″ 359°26′08″ −8″ 85 84°59′54″ 359°26′05″ −11″ 70 69°59′52″ 359°25′51″ 25″ 55 54°59′51″ 359°25′51″ 25″ 40 39°59′59″ 359°25′51″ 25″ 25 25°0′2″ 359°25′52″ 24″
Table 4. Test results of pitch axis rotation accuracy
View tableView in ArticleTable 4. Test results of pitch axis rotation accuracy
Rated value Encoder returned value Theodolite measured value Bias 16 15°59′50″ 275°21′34″ 0″ 31 31°0′2″ 275°21′53″ 19″ 46 46°0′4″ 275°21′34″ 0″ 61 61°0′0″ 275°21′05″ −29″ 76 76°0′2″ 275°20′58″ −36″ 61 60°59′55″ 275°21′39″ 5″ 46 45°59′56″ 275°21′43″ 9″ 31 30°59′58″ 275°21′59″ 25″ 16 15°59′51″ 275°21′40″ 6″
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Hui Shao, Beining Sa, Wei Li, Yuwei Chen, Lu Liu, Jie Chen, Long Sun, Yuxia Hu. A design and implementation of full waveform hyperspectral LiDAR for ancient architecture modelling[J]. Infrared and Laser Engineering, 2022, 51(8): 20210786
Paper Information
Category: Lasers & Laser optics
Received: Oct. 26, 2021
Accepted: Jan. 7, 2022
Published Online: Jan. 9, 2023
The Author Email: Sa Beining (shadow4u@foxmail.com)
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