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22 July 2003 Vehicle axle detector for roadways based on fiber optic interferometer
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Road monitoring instrumentation is becoming an important part of traffic management systems. Axle detectors are part of this instrumentation and have been subject to considerable practical investigation in recent years. This paper presents a new fiber optic vehicle axle detector for roadways. It is based on a fiber optic Michelson interferometer that is mounted directly into the road surface. The system is based on a minimum number of standard, cost effective, telecommunication fiber optic components. The detector is placed beneath the road surface and is not subjected to the wear and tear as in teh case of current commercially available axle detectors. The detector operation was tracked for a period of one full year deployed in a freeway with an average frequency of 20,000 vehicles per day. During this period we did not observe any degradation of performance or malfunction of the proposed system. In addition, a fully dielectric design allowed for remote operation of the sensor via a long section of optical fiber.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Denis Donlagic and Marjan Hanc "Vehicle axle detector for roadways based on fiber optic interferometer", Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, (22 July 2003);

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