Pressure sensor fault detection

Details Pressure sensor fault detection Pressure sensor fault detection

2007-12-18

2007-12-18

Allen, Andre J. (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S724000, C361S283100

Reexamination Certificate

active

11340316

ABSTRACT:
A diagnostic system for a pressure sensor having a cavity configured to receive on applied pressure is provided. The cavity has a first and a second wall. A deflectable diaphragm is positioned in the cavity and configured to form a first and a second capacitance with the first wall and a third and a fourth capacitance with the second wall which change in response to the applied pressure. The capacitances form a first transfer function and a second transfer function. Changes in the first transfer function relative to the second transfer function are detected to provide a diagnostic output.

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