Intelligent vehicle highway system sensor and method

Details Intelligent vehicle highway system sensor and method Intelligent vehicle highway system sensor and method

1996-08-09

1998-05-26

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

356376, 356398, G01B 1124

Patent

active

057574723

ABSTRACT:
A sensor using pulsed laser range imaging technology is adapted for determining a three-dimensional profile of a vehicle passing the sensor for use in Intelligent Vehicle Highway Systems. A continuously pulsed laser beam scanned across a detection area determines the presence of a vehicle. Range, angle and time date for a vehicle passing the sensor are collected and stored for use in determining its three-dimensional profile. Forward and backward beams are directed for scanning across the detection area. Pulsed energy is sent into the two divergent beams, which are received as reflective energy in a receiver. The receiver accepts reflections from the beams and provides inputs for purposes of determining time of flight, and for measuring the time interval between interceptions of the two divergent beams for a given vehicle. An encoder tracks the position of the mirror for providing angle data with associated range measurements.

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