Highway profile measuring system
September 30, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3705772 Apparatus for measuring the profile of a railroad tunnel Surface profile measuring device Mobile apparatus for determining the lateral position of a railroad track Image sensor Non-contact road profilometer and deflection meter Three dimensional imaging method and device Method and system for measurement of road profile Method and apparatus for measuring load bearing capacity of traffic-carrying surfaces Method for mobile survey of road surface InventorApplicationNo. 130099 filed on 09/30/1993US Classes:356/5.1, Of CW phase delay73/146, TIRE, TREAD OR ROADWAY356/2, CONTOUR PLOTTING356/3.01Triangulation ranging to a point with one projected beamExaminersPrimary: Buczinski, Stephen C.Attorney, Agent or FirmInternational ClassesG01C 003/08G01C 011/12 G01C 003/00 E01C 023/00 AbstractA 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.Other References
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