Sensor system for releasing passive safety apparatus in car crashes
First Claim
1. A sensor system for releasing passive safety systems such as air cushions, belt tighteners or similar arrangements, during car collisions, comprising:
- transducer means for providing an electrical signal responsive to vehicular accelerations;
means for supplying an input voltage;
reference voltage means, responsive to said means for supplying an input voltage, for supplying a stabilized reference voltage to said sensor system;
amplifier means responsive to said electrical signal from said transducer means for effecting bipolar asymmetrical limitation of said electrical signal;
means responsive to said electrical signal from said transducer means and to said amplifier means for integrating said electrical signal;
switching threshold means for providing release signals to said passive safety systems, said switching threshold means further including evaluation circuit means for setting predetermined switching conditions of said switching threshold means, said switching threshold means responsive to said integrating means and said reference voltage means; and
voltage monitor means responsive to said input voltage supply means and said reference voltage means for blocking the release signals from the switching threshold means upon the occurrence of an improper voltage condition.
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Abstract
A sensor system for the release of passive safety systems such as air cusns, belt tighteners or similar arrangements during car collisions is disclosed. The sensor system is designed to release the passive safety systems only within predetermined limits. The sensor system will prevent release of the safety systems during improper voltage conditions. Asymmetrical limitation of the acceleration-responsive electrical signal is provided. The provision of delay elements and a circuit for avoiding release of the passive systems during ordinary acceleration conditions insure the use of the safety systems only during collision situations.
16 Citations
16 Claims
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1. A sensor system for releasing passive safety systems such as air cushions, belt tighteners or similar arrangements, during car collisions, comprising:
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transducer means for providing an electrical signal responsive to vehicular accelerations; means for supplying an input voltage; reference voltage means, responsive to said means for supplying an input voltage, for supplying a stabilized reference voltage to said sensor system; amplifier means responsive to said electrical signal from said transducer means for effecting bipolar asymmetrical limitation of said electrical signal; means responsive to said electrical signal from said transducer means and to said amplifier means for integrating said electrical signal; switching threshold means for providing release signals to said passive safety systems, said switching threshold means further including evaluation circuit means for setting predetermined switching conditions of said switching threshold means, said switching threshold means responsive to said integrating means and said reference voltage means; and voltage monitor means responsive to said input voltage supply means and said reference voltage means for blocking the release signals from the switching threshold means upon the occurrence of an improper voltage condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification