20 August 1979 Electro-Optical Sensor For Measuring Road Surface Texture
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Proceedings Volume 0178, Smart Sensors; (1979); doi: 10.1117/12.957273
Event: Technical Symposium East, 1979, Washington, D.C., United States
Abstract
ENSCO, Inc. is developing a sensor for the Maryland State Highway Administration that will measure road surface texture from aboard a moving vehicle. In the future this sensor will enable real-time classification of pavement texture, which enables the speed dependency of skid resistance to be determined. The sensor consists of a projector, detector, and electronic processor. The projector projects an extremely short-duration slit of light vertically downwards onto the road surface. This results in an illuminated single-line profile of the surface texture. This texture profile is detected by a vidicon camera that views the surface at a 45 degree angle. The camera image is digitized by the processor and stored on digital tape to facilitate subsequent computer processing of the texture data. The sensor system is designed to measure four-inch long samples of surface texture with a resolution of 0.01 inches at vehicle speeds up to 40 mph.
© (1979) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Clarence Cantor, "Electro-Optical Sensor For Measuring Road Surface Texture", Proc. SPIE 0178, Smart Sensors, (20 August 1979); doi: 10.1117/12.957273; https://doi.org/10.1117/12.957273
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KEYWORDS
Sensors

Cameras

Roads

Prototyping

Video

Silicon

Smart sensors

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