Fast Pressure Based Sensing Systems for Side Impact Restraint Systems 1999-01-3184
This paper describes the application and the algorithm concepts of a high volume product for a very fast side impact detection system. To activate a side airbag the inner-door air pressure is measured by the sensing system. Specific characteristics of this pressure signal reflect different crash modes and, in conjunction with intelligent algorithms, very short activation times for side impact restraint systems are reached. These deployment times are typically faster than those of acceleration based sensing systems æ usually less than 5ms in all legal test modes. In addition to this the system is very robust during real world driving conditions such as crossing railroad tracks and potholes or more generally in events which do not compress the air of the inner-door cavity. Result tables of firing times to compare the acceleration- and the pressure-based system are included for several platforms.
Finally, an example of a combined acceleration- and pressure-based system is given as a proposal to discriminate all real world crash conditions in an appropriate response time.
Citation: Winkler, G., Pfau, L., and Stierle, T., "Fast Pressure Based Sensing Systems for Side Impact Restraint Systems," SAE Technical Paper 1999-01-3184, 1999, https://doi.org/10.4271/1999-01-3184. Download Citation
Author(s):
Gerd Winkler, Lorenz Pfau, Thomas Stierle
Affiliated:
Siemens Automotive
Pages: 7
Event:
International Body Engineering Conference & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Sensors and Transducers-PT-68, Sensors and Transducers, Second Edition-PT-105
Related Topics:
Side impact crashes
Restraint systems
Pressure
Reaction and response times
Crashes
Airbag systems
Mathematical models
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