In the present paper specialised pressure sensor IC's for side crash detection are described in detail. A part for a side airbag system consisting of the door module, the transmission line and the airbag ECU are presented. The core of the pressure sensor IC is surface micromachined capacitive sensor cells, monolithically integrated with an A/D converter and digital signal conditioning circuitry. The pressure sensor IC offers a digital interface which is compatible with standard microcomputers. Furthermore self diagnosis features are implemented which are essential for safety relevant applications.Two types of pressure sensors are available. A basic type providing an absolute pressure signal via SPI and an advanced type providing a Manchester encoded pre-processed relative pressure signal. The advanced type allows to reduce the number of devices and hence the construction of cost effective door modules. Both types have a small SMD package which is proven for automotive requirements.


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    Title :

    Advanced solution for pressure based side airbag systems


    Additional title:

    Fortgeschrittene Technologie für Druck sensierende Seiten-Airbag-Systeme


    Contributors:
    Kandler, M. (author)


    Publication date :

    2003


    Size :

    7 Seiten, 4 Bilder, 3 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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