A small, low-cost piezoresistive acceleration sensor suitable for automotive applications such as advanced breaking control and suspension control systems has been developed. A piezoresistive semiconductor sensor has such advantages as high output linearity, long-term output repeatability and DC response a piezoelectric sensor doesn't feature. One drawback, however, is that piezoresistive characteristics are quite temperature sensitive: Such that temperature dependence of DC offset and span have to be compensated with a certain electrical circuit. With 1 mV/Vs/G, the low sensitivity of the acceleration sensor (Vs:bridge voltage, G:gravitational acceleration), the temperature shift of DC offset represented in terms of the sensitivity becomes relatively high. For this reason, we have used a new temperature compensation circuit including a voltage supply sensitive to temperature and a compensation resistor, achieving about 3 % offset temperature error per 1.5 G full scale in the operating temperature range from -30 Cel to 85 Cel.


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    Title :

    Piezoresistive acceleration sensor for automotive applications


    Additional title:

    Piezoresistiver Beschleunigungssensor für Anwendungen in Kraftfahrzeugen


    Contributors:
    Tsugai, M. (author) / Bessho, M. (author) / Araki, T. (author) / Onishi, M. (author) / Sesekura, T. (author)

    Published in:

    Publication date :

    1992


    Size :

    6 Seiten, 9 Bilder, 2 Tabellen, 7 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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