LASER RANGING OVER-HEIGHT VEHICLE DETECTOR SYSTEM (LARA-OHVD)
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United States of America
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Mar 12, 2020
app pub date -
Sep 12, 2019
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Sep 12, 2019
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Abstract
A device for producing a triangular laser sheet. The device has an optical transmitter with a pair of plano-convex cylindrical lenses for circularizing infrared laser light and a plano-concave cylindrical lens for shaping the circularized light to produce a triangular laser sheet. A tilt sensor measures departure of the triangular laser sheet from a horizontal reference. The device projects a triangular sheet of infrared light that is useful for detecting over-height vehicles that are approaching a structure, such as a bridge.
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