Pressure transducer

Details Pressure transducer Pressure transducer

1981-03-25

1983-12-27

Swisher, S. Clement

Measuring and testing

Fluid pressure gauge

Diaphragm

73701, 73708, 361283, G01L 912

Patent

active

044223358

ABSTRACT:
A pressure transducer (26) is disclosed. A multiplicity of signal plates (Cs, Cr, Csf, Crf) are disposed on a first quartz disc (88). Opposing the signal plates (Cs, Cr, Csf, Crf) across a gap formed by an annular frit (92) is a common plate (94) disposed on a second quartz disc (86). The signal plates (Cs, Cr, Csf, Crf) and common plate (94) form capacitors which are operable to modulate alternating excitation signals applied to the signal plates. The capacitances vary the modulation during deflections of the discs (86, 88) as a result of pressure changes, and the common plate (94) algebraically sums the modulated excitation signals into a single output from the transducer (26).

REFERENCES:
patent: 4064550 (1977-12-01), Dias et al.
patent: 4152748 (1979-05-01), Arkans
patent: 4175428 (1979-11-01), Eilersen
patent: 4227419 (1980-10-01), Park
patent: 4322977 (1982-04-01), Sell et al.

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