Method for mobile survey of road surface

Details Method for mobile survey of road surface Method for mobile survey of road surface

1986-04-11

1989-01-10

Rosenberger, R. A.

Optics: measuring and testing

By polarized light examination

With light attenuation

356 1, 73146, G01B 1130

Patent

active

047969989

ABSTRACT:
A road surface illuminated by sunlight is scanned with a laser beam at right angles to the direction of travel, the intensity of the laser beam being intensity modulated with a predetermined frequency; laser beams reflected from the road surface are received and optically filtered to filter out light having frequencies outside that of the laser beam. The optically filtered laser beam strikes a plurality of beam position sensing elements from which respective electrical signals are derived. The resulting electrical signals are then multiplexed and electrically band-pass filtered wherein the center frequency of the band-pass filtering coincides with the frequency at which the laser beam is intensity modulated.

REFERENCES:
patent: 3423527 (1969-01-01), Collins
patent: 3612890 (1971-10-01), Cornyn et al.
patent: 4567347 (1986-01-01), Ito et al.
patent: 4601574 (1986-07-01), Yamane et al.
patent: 4653316 (1987-03-01), Fukuhara
Cantor, C. "Electro-Optical Sensor for Measuring Road Surface Texture" Proceedings of the Society of Photo-Optical Instrumentations Engineers, Conference, Washington, D.C., Apr. 17-18, 1979, pp. 127-135.

Affiliated with

Also associated with

Rating

Method for mobile survey of road surface does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for mobile survey of road surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for mobile survey of road surface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2105352