Pressure transducer

Details Pressure transducer Pressure transducer

G - Physics

01

L

73/3

G01L 9/12 (2006.01) G01L 9/00 (2006.01)

Patent

CA 1168887

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 alter nating excitation signals applied to the signal plates. The capa- citances 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).

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