Citation

Iwama D, Kaneko T, Kitagawa H, Kido A, Naganuma K, Takezawa S. Trans. Soc. Automot. Eng. Jpn. 2018; 49(4): 806-811.

Copyright

(Copyright © 2018, Society of Automotive Engineers of Japan)

DOI

10.11351/jsaeronbun.49.806

PMID

unavailable

Abstract

NIR spectroscopic method was applied for road surfaces in winter and the feasibility of real-time detection for the friction coefficient was reported on the previous study. In this paper, a real-time two-dimensional measurement method, polarized spectroscopic analysis, with an image from conventional CCD camera ready on board in current vehicle was tested. First of this study, methodology of spectral polarization measuring, "Fresnel equations" were applied and build the theoretical formulas for the tested road conditions. Furthermore, by the experimental analysis, the possibility to distinguish road conditions and estimate a road surface friction coefficient at vehicle forward are observed.

Language: ja

Keywords

Safety; Vehicle Sensor; Road Environment; Friction Coefficient; Icy Road; Image Processing; NIR; Spectral Polarimetry