Axle sensors are extensively used in traffic counting and classification systems. Most modern axle sensors are constructed of piezoelectric plastics. These give good all round performance and, coupled with charge amplifiers, offer reasonable sensitivity and low speed performance. Fibre-optic materials are now being investigated for two principal reasons. First, as piezoelectricity is generated by mechanical impulses, such sensors do not respond to static loads. Unfortunately, as congestion increases (and sites of traffic interest are often those where congestion occurs), stationary or very slowly moving vehicles are increasingly common. Fibre-optic sensors offer static as well as dynamic measurement. Secondly, a replaceable 'Tee' section piezoelectric sensor costs over Pounds 150, and fibre-optic technology, because of its wide use in the communications industry, has the potential to become the basis of cheaper sensors.


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    Title :

    Fibre-optic axle sensors for vehicle data collection


    Additional title:

    Faseroptische Achsensensoren für das Sammeln von Fahrzeugdaten


    Contributors:
    Stevens, A. (author) / Spindlow, J.R. (author) / Jones, G.R. (author)


    Publication date :

    1990


    Size :

    5 Seiten, 4 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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