Measuring and testing – Fluid pressure gauge – Electrical
Patent
1989-04-04
1991-10-08
Crosland, Donnie L.
Measuring and testing
Fluid pressure gauge
Electrical
73DIG4, 310338, 338 4, G01L 900
Patent
active
050543237
ABSTRACT:
The present invention is a device for characterizing pressure distributions on a rigid surface with respect to at least one reference (x) axis. The device includes a substrate electrode disposed on the rigid surface for which the pressure distribution is to be characterized. An electrically conductive material may form the substrate electrode, or where the rigid surface itself is electrically conductive, that rigid surface may form the substrate electrode. A piezo film is disposed on and overlying the rigid surface. A sensor electrode is disposed on and overlying at least part of the piezo film. In one form of the invention the sensor electrode of a measurement cell is a composite electrode including at least two electrically isolated portions. One portion has a dimension transverse to the reference axis which varies in proportion to position (x) along the reference axis, and the other portion has a dimension transverse to the reference axis which varies in proportion to one minus position (1-x) along the reference axis.
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Burke Shawn E.
Hubbard, Jr. James E.
Crosland Donnie L.
Swarthout Brent A.
The Charles Stark Draper Laboratory Inc.
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