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A Complete Frontal Crash Sensor System - 1
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English
Abstract
This is the first paper in a new series to present a coherent theory of sensing frontal crashes, define the characteristics of future airbag sensor systems and to present examples of how this theory can be implemented. After summarizing the relevant conclusions from the authors' previous papers, this paper concludes that future systems should contain: crush zone sensors which sense relevant impacts to all portions of the vehicle front; an occupant position sensor as an input to the sensing system; and a mechanical safing/arming sensor having a long dwell. It is further concluded that cars should be designed so that only impacts involving the front of the vehicle need be sensed for the deployment of frontal protection airbags.
This series of papers has the main goal of determining an overall theory of frontal crash sensing and the resulting desirable properties of sensor systems. A second goal is to give examples of how this theory can be realized in real sensor systems. There is a need for such an analysis as can be seen from the wide variety of sensor systems in use today - it is unlikely that they are all right. In addition several organizations are developing computer algorithms for “Single Point Sensors” based on a variety of different theories. This diversity of systems leads to the conclusion that there is no generally accepted theory of how to sense car crashes.
This paper develops a general theory of crash sensing by combining conclusions from previous papers with new analysis and presents a system which conforms to this theory. In later papers in this series, careful analysis will be made of real world crashes to refine the theory and improve the system design.
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Authors
Citation
Breed, D., Sanders, W., and Castelli, V., "A Complete Frontal Crash Sensor System - 1," SAE Technical Paper 930650, 1993, https://doi.org/10.4271/930650.Also In
References
- Mertz Driscoll Lenox Nyquist Weber titled “Response of Animals Exposed to Deployment of Various Passenger Inflatable Restraint System Concepts for a Variety of Collision Severities and Animal Positions” SAE 826074 1982
- Breed D.S. Sanders W.T. Castelli V. “A Critique of Single Point Crash Sensing” Society of Automotive Engineers No. 920124 1992
- Breed D.S. Sanders W.T. Castelli V. “Performance of a Crush Sensor for Use with Automotive Airbag Systems” Society of Automotive Engineers No. 920122 1992
- Breed D.S. Castelli V. Shokoohi F. “Are Barrier Crashes Sufficient for Evaluating Air Bag Sensor Performance?” Society of Automotive Engineers No. 900548 1990
- Shokoohi F. Sanders W.T. Castelli V. “Cross Axis Specifications For Crash Sensors” Automotive Technologies International Report, ATl12004 1991
- Breed D.S. Castelli V. “Problems in Design and Engineering of Air Bag Systems” Society of Automotive Engineers No. 880724 1988
- Breed D.S. Castelli V. “Trends in Sensing Frontal Impacts” Society of Automotive Engineers No. 890750 1989
- Castelli V. Breed D.S. “Trends in Sensing Side Impacts” Society of Automotive Engineers No. 890603 1989