Measuring and testing – Gas analysis – Pressure
Patent
1996-12-20
1999-02-09
Williams, Hezron E.
Measuring and testing
Gas analysis
Pressure
73 52, 73629, 73703, 73708, 280735, 280736, 280737, 280741, G01N 2902
Patent
active
058697454
ABSTRACT:
An inflator for an airbag system has a target mounted in the pressurized gas contained in the inflator. An ultrasonic transducer is mounted on an external surface of the inflator in alignment with the target. The transducer generates and receives reflected ultrasonic signals from the target. The time-of-flight of the signals which are dependent on the gas pressure are used to determine the gas pressure in the inflator. Temperature compensation is provided by fabricating the target of bimetallic material which changes the spacing of the target from the transducer with temperature or providing a temperature sensitive element, e.g. a thermocouple to electrically provide temperature compensation.
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Clark Marcus T.
Fleming Marvin F.
Hersh Samuel
Schroeder David D.
Strong Clark C.
Miller Rose M.
Morton International Inc.
Rauchfuss, Jr. George W.
Williams Hezron E.
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