Thermal expansion compensated pressure sensor

Details Thermal expansion compensated pressure sensor Thermal expansion compensated pressure sensor

2008-05-06

2008-05-06

Allen, Andre J. (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S716000, C073S753000, C073S754000

Reexamination Certificate

active

07367235

ABSTRACT:
A pressure sensor (30) for environments with wide ranging temperatures such as vehicle tires. The sensor has a conductive sensor membrane (53) exposed to the fluid pressure to be sensed, and a similarly conductive reference membrane subject to a predetermined pressure difference. Both membranes are connected to circuitry that converts the deflection in the sensor membrane into an output signal indicative of the pressure difference across the sensor membrane, and converts the deflection of the reference membrane into a thermal expansion compensation value used to adjust the output signal in response to temperature variations in the pressure sensor's environment.

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