Apparatus mounted on vehicles for detecting road surface conditions
First Claim
1. A road surface condition detecting apparatus mounted on a vehicle comprising;
- laser beam scanning means for scanning a laser beam in a transverse direction of the road surface;
image pick-up means for picking up locus of a scanning of said laser beam in an inclined direction for producing transverse profile data of the road surface;
light receiving means for receiving a laser beam reflected from said road surface in an inclined direction for producing crack data of said road surface;
road distance detecting means for measuring distances to said road surface from three positions on a line in the longitudinal direction of said vehicle for producing longitudinal profile data of said road surface;
running distance detecting means for measuring a running distance of said vehicle; and
recording means for recording data respectively produced by said image pick-up means, said light receiving means and said distance detecting means together with the running distance data produced by said running distance detecting means.
1 Assignment
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Accused Products
Abstract
A road surface is scanned with a laser beam in a direction transverse to the road surface to pick up the scanning locus of the laser beam on the road surface in a direction inclined to a beam scanning surface so as to obtain transverse profile data. The laser light reflected from the road surface is received in a direction inclined to the beam scanning surface for obtaining crack data. The distances to the road at three points in the longitudinal direction of a measuring car are measured. The running distance of the car is measured and the measured distance data are recorded in a recording device together with crack data, transverse profile data and longitudinal profile data.
341 Citations
11 Claims
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1. A road surface condition detecting apparatus mounted on a vehicle comprising;
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laser beam scanning means for scanning a laser beam in a transverse direction of the road surface; image pick-up means for picking up locus of a scanning of said laser beam in an inclined direction for producing transverse profile data of the road surface; light receiving means for receiving a laser beam reflected from said road surface in an inclined direction for producing crack data of said road surface; road distance detecting means for measuring distances to said road surface from three positions on a line in the longitudinal direction of said vehicle for producing longitudinal profile data of said road surface; running distance detecting means for measuring a running distance of said vehicle; and recording means for recording data respectively produced by said image pick-up means, said light receiving means and said distance detecting means together with the running distance data produced by said running distance detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification