Side airbag sensor in silicon micromachining

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Side airbag sensor in silicon micromachining

Ullmann, D. / Bischopink, G. / Schöfthaler, M. / Schellin, R. / Maihöfer, B. / Seibold, J. / Marek, J.

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 minimize 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 characterization are presented.

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Document information

Title :

Side airbag sensor in silicon micromachining

Additional title:

Seitenairbagsensor in Silicium-Mikrooberflächenbearbeitung

Contributors:

Ullmann, D. (author) / Bischopink, G. (author) / Schöfthaler, M. (author) / Schellin, R. (author) / Maihöfer, B. (author) / Seibold, J. (author) / Marek, J. (author)

Published in:

Passenger Safety and Convenience Systems - Automotive Electronics Series, 2000 ; 83-87

SAE-PT ; PT-83

Publication date :

2000

Size :

5 Seiten, 11 Bilder, 6 Quellen

ISBN :

0-7680-0683-X

Type of media :

Conference paper

Type of material :