| 摘要 |
A mobile system for measuring characteristics of traffic-bearing surfaces has laser cameras mounted on a vehicle for measuring the distance to the surface as the vehicle travels along it. A rotating laser at a known, fixed elevation generates a laser plane over the surface while a second oscillating or rotating laser generates a substantially vertical laser plane in the direction of measurement of the surface. The vehicle carries a pair of sensors for detecting the incidence of the laser planes thereon. The sensors generate signals which represent the exact vertical and lateral position of the vehicle with reference to the fixed laser planes at any point on the surface. These signals are used to obtain values representative of the vertical elevation of the surface compensated for deviations in the vertical position of the vehicle during the measurement, and to record and control the measuring path of the vehicle.
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