Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
This report explains the working principle, structure, and performance of a new detector of water on a road surface paved with concrete by polarized light. Near the polarizing angle, reflected light from the road surface includes vertical and horizontal polarized components. Intensity difference of the two polarized lights is very small on the dry road surface. On the wet road surface, the vertical component decreases much more than horizontal component. Based on the above mentioned fact, experiments to detect water on a road surface were carried out using a rotating polarizer (41.3 rps) and a silicon pinphotodiode under the sunlight. Experimental results showed that this system could remotely detect water on the road surface over the area of a few square meters.
This report explains the working principle, structure, and performance of a new detector of water on a road surface paved with concrete by polarized light. Near the polarizing angle, reflected light from the road surface includes vertical and horizontal polarized components. Intensity difference of the two polarized lights is very small on the dry road surface. On the wet road surface, the vertical component decreases much more than horizontal component. Based on the above mentioned fact, experiments to detect water on a road surface were carried out using a rotating polarizer (41.3 rps) and a silicon pinphotodiode under the sunlight. Experimental results showed that this system could remotely detect water on the road surface over the area of a few square meters.
Henko Ni Yoru Romen No Nure No Kanshutsu (Detection of Water on Road Surface by the Polarized Light)
T. Kimura (Autor:in)
1993
6 pages
Report
Keine Angabe
Englisch
Transportation & Traffic Planning , Transportation , Road Transportation , Optical Detection , Light scattering , Optical measurement , Polarized light , Roads , Surface water , Optical polarization , Moisture content , Photodiodes , Polarizers , Remote sensing , Foreign technology , Highway management