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
- Acta Optica Sinica
- Vol. 40, Issue 23, 2312004 (2020)
Fig. 1. Detection principle of water film thickness
Fig. 2. Structure of road surface meteorological detection system
Fig. 3. Image of experimental system
Fig. 4. Short wave infrared reflection spectra of water and ice
Fig. 5. Structural diagram of optical paths
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°
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Table 1. Measurement results of water film thickness under different detection conditions (λ=1310 nm)
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Table 2. Threshold for meteorological state discrimination
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