Automotive restraint systems today are more and more using pressure sensors in order to early and safely detect side crashes. A reliable, precise and fast measurement of the air pressure is the key precondition for an optimised system performance. Bosch presents a new generation of Bosch pressure sensors called PPS2 (Peripheral Pressure Sensor) that is specifically designed for airbag system application. The key component of the sensor is a pressure sensor module (SMD187) that integrates a micromechanical membrane, an ASIC with band-pass filter, trimming, and signal processing as well as the digital interface. The micromechanical part is realized using the new pressure sensor technology developed by Bosch named APSM (Advanced Porous Silicon Membrane). APSM purely bases on surface micromechanical process steps and turns out to be very robust monocrystalline Silicon membranes. The sensor provides a filtered and normalized differential pressure signal delta P / P0 to the airbag ECU using the well-established PSI5 standard current interface. The pressure range of the sensor allows to run the system at altitudes up to 4000 m above sea level. The normalized differential pressure signal is transferred within a range of -5 to + 15% of the ambient pressure. PPS2 allows easy application and system setup, offers high system flexibility and provides a reliable, precise and fast pressure signal to the airbag system.


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    Title :

    A new micromechanical pressure sensor for automotive airbag applications


    Additional title:

    Ein neuer mikromechanischer Drucksensor zum Einsatz beim Fahrzeug-Airbag


    Contributors:
    Adam, B. (author) / Brandt, T. (author) / Henn, R. (author) / Reiss, S. (author) / Lang, M. (author) / Ohl, C. (author)


    Publication date :

    2008


    Size :

    26 Seiten, 22 Bilder, 9 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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