Device for determining the surface condition of a roadway

Details Device for determining the surface condition of a roadway Device for determining the surface condition of a roadway

2005-09-08

2009-11-10

Hannaher, Constantine (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

C250S339010, C250S339060

Reexamination Certificate

active

07615750

ABSTRACT:
A device for determination of the surface condition of a roadway includes 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.

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International Search Report from EP 05 01 8740 (5 pages), Dec. 22, 2005.

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