Patent ID: 7615750
Filing Date: 2009-11-10
Classification: B60Q,B60T,G01J,G01N,G01S,G08B,G08G

Abstract:
1. A device for determination of the surface condition of a roadway, the device comprising: a light-sensitive sensor to measure a light signal reflected from the surface of the roadway; and an analyzer to determine the surface condition of the roadway as a function of the power of the light signal at a first wavelength in the infrared range, at a second wavelength in the infrared range, and at least a third wavelength in the infrared range, wherein the device is operable to determine the surface condition of the roadway by means of the analyzer as a function of the ratio of the power of the light signal at the first wavelength to the power of the light signal at the second wavelength, as a function of the power of the light signal at the first wavelength, as a function of the power of the light signal at the second wavelength, and as a function of the power of the light signal at the third wavelength.