On-board absolute speed sensors would be very useful in automotive applications in order to perform the measurement of the speed independently of the wheel rotation. Narrow beam Doppler sensors give a good accuracy but only operate if there is a reflection obstacle in the antenna footprint on the road. Broad beam Doppler sensors have the advantage of offering a higher probability of getting a reflected wave, but they require multiple frequencies. A novel sensor is presented. It uses a single frequency emission, which leads to low cost devices. Simulations and measurements have been carried out which show that it is particularly well adapted to high-risk situations, for instance icy or very wet road surfaces, when only a few reflecting obstacles are present. In such situations, the accuracy of the measurement is typically of the order of 0.5 per cent.


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    Title :

    A broad beam Doppler speed sensor for automotive applications


    Additional title:

    Breitstrahl-Doppler-Geschwindigkeitssensor für den Einsatz in Automobilen


    Contributors:
    Corbrion, C. (author) / Ditchi, T. (author) / Hole, S. (author) / Carreel, E. (author) / Lewiner, J. (author)

    Published in:

    Sensor Review ; 21 , 1 ; 28-32


    Publication date :

    2001


    Size :

    5 Seiten, 6 Bilder, 4 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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