Acta Optica Sinica, Volume. 40, Issue 23, 2312004(2020)
Methods for Non-Contact Road Surface Meteorological Sensing Based on Dual-Wavelength Laser
Figures & Tables(10)
Fig. 6. Light spots under different detection distances after simulation optimization. (a)(b)(c) Ground spost; (d)(e)(f) detector spot
Fig. 7. Relative reflectivity measurement value for each state at λ=1550 nm, L=3 m and θ=20°
Fig. 8. Relative reflectivity measurement value for each state at λ=1550 nm, L=5 m and θ=30°
Table 1. Measurement results of water film thickness under different detection conditions (λ=1310 nm)
View tableTable 1. Measurement results of water film thickness under different detection conditions (λ=1310 nm)
No. Condition Idry /mV Q j RMSE EMAX E'MAX 1 Light, L=3000 mm, θ=20° 2700 -0.333 44 0.051 0.082 0.082 2 Light, L=5000 mm, θ=20° 1966 -0.311 32 0.052 0.096 0.115 3 Light, L =3000 mm, θ=30° 1381 -0.291 20 0.054 0.041 0.108 4 Dark, L =3000 mm, θ=20° 1595 -0.335 43 0.069 0.098 0.098 5 Dark, L =5000 mm, θ=20° 1438 -0.355 26 0.074 0.069 0.078 6 Dark, L =3000 mm, θ=30° 923 -0.315 20 0.070 0.098 0.112
Table 2. Threshold for meteorological state discrimination
View tableTable 2. Threshold for meteorological state discrimination
State Dry Wet Seeper Freezing Mix Threshold R≈1.00 and D≈0 R≤0.15 and D<2 mm R≤0.15 and D≥2 mm R≥0.30 and D≠0 mm 0.15<R<0.30 and D≠0
Tools
Get Citation
Copy Citation Text
Decao Wu, Peng Liu, Binbin Luo, Junhao Pu, Enhua Liu, Shanghai Jiang, Bin Tang, Tao Song, Mingfu Zhao. Methods for Non-Contact Road Surface Meteorological Sensing Based on Dual-Wavelength Laser[J]. Acta Optica Sinica, 2020, 40(23): 2312004
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Jul. 20, 2020
Accepted: Aug. 26, 2020
Published Online: Nov. 23, 2020
The Author Email: Luo Binbin (luobinbin@cqut.edu.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20