Highway profile measuring system

Optics: measuring and testing – Range or remote distance finding – With photodetection

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Details

73146, 356 2, 356 301, 356376, 356 28, E01C 2300, G01B 1124, G01C 308, G01P 336

Patent

active

057902437

ABSTRACT:
A system for measuring the quality of pavement surfaces. An amplitude modulated laser scanning system, mounted on a motor vehicle, scans the pavement surface as the motor vehicle travels over it. A detector detects the laser beam reflection from the surface and a phase measuring device counts pulses to digitally determine the phase shift in the reflected laser beam in order to calculate the profile of the surface. The profile information is used to determine various quality features of the pavement surface.

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patent: 5006721 (1991-04-01), Cameron et al.

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