For side airbag systems it is necessary to measure the acceleration within a time of less than 3 ms in order to inflate the side airbag in time. A new generation of side airbag sensors that uses a linear accelerometer is presented. The evaluation circuit includes amplification, temperature coefficient compensation, two wire unidirectional current interface, and a zero-offset compensation. The sensing element for the measurement of acceleration is a surface micromachined accelerometer. In order to minimise the production costs the surface micromachined sensor element and the corresponding evaluation ASIC are packaged into a standard PLCC28 housing. For the entire function only few external components are necessary. During the power-on cycle an internal selftest is carried out and the result is transmitted to the airbag control unit. Most important results of the characterisation are presented.


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    Titel :

    Side Airbag Sensor in Silicon Micromachining


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Maihöfer, B. (Autor:in) / Ullmann, D. (Autor:in) / Bischopink, G. (Autor:in) / Marek, J. (Autor:in) / Seibold, J. (Autor:in) / Schöfthaler, M. (Autor:in) / Schellin, R. (Autor:in)

    Kongress:

    International Congress & Exposition ; 1999



    Erscheinungsdatum :

    01.03.1999




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Side airbag sensor in silicon micromachining

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