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US 6,474,142 B2Granted
Device for testing pressure in a gas reservoir
AssigneeBreed Automotive Technology, Inc.
InventorsMartin Specht, Thomas Kilian
Life of this patent
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Abstract
A device for testing the inflation state of an cold gas inflator for an airbag has a gas reservoir that is filled with gas at a high pressure, in particular an inert gas. Oscillations of frequencies varying within a particular frequency range are generated at the filled gas reservoir and the resonance frequency is measured. The measured resonance frequency is compared by a comparator with a resonance frequency which was determined at the gas reservoir filled with the desired pressure.
Claims5
A device for testing the internal pressure of a gas reservoir comprising:
- an oscillation transmitter that can be placed on the outside of the reservoir;
- an oscillation sensor that can be placed on the outside of the reservoir;
- tongs having jaws with the oscillation transmitter and the oscillation sensor arranged on the jaws of the tongs;
- and
- evaluation electronics comprising a comparator, connected to the oscillation sensor and a set value transmitter that indicates the resonance frequency measured under a set internal pressure, whereby the comparator compares the resonance frequency measured by the oscillation sensor with the resonance frequency indicated by the set value transmitter.
2 more elements
Dependencies are inferred from the claim text.