Temperature compensated pressure transducer

Details Temperature compensated pressure transducer Temperature compensated pressure transducer

1985-07-26

1987-09-01

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

73718, 73724, 361283, G01L 708, G01L 912, G01L 1904

Patent

active

046899995

ABSTRACT:
A quartz pressure transducer is disclosed which includes four or five elements, three of which are diaphragms containing deposited metal electrodes on both sides thereof. Since the electrodes are all on the diaphragms, the transducer disclosed herein is highly resistant to errors caused by changes in temperature, while retaining excellent resistance to errors caused by acceleration or vibration forces. The transducer may be constructed as either an absolute pressure sensor or as a differential pressure sensor, and in the primary embodiment contains a reference capacitance which may be used by appropriate electronic circuitry to provide compensation for acceleration or vibration forces, making the output of the pressure transducer of the present invention a highly accurate, highly sensitive indication of pressure sensed.

REFERENCES:
patent: 2080429 (1937-05-01), McNally
patent: 3314493 (1967-04-01), Kennedy
patent: 4301492 (1981-11-01), Paquin et al.
patent: 4422335 (1983-12-01), Ohnesorge et al.
patent: 4507973 (1985-03-01), Barr et al.
patent: 4545254 (1985-10-01), Lawless et al.

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