Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1989-01-30
1991-05-28
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
73724, 324678, 324679, G01R 2726
Patent
active
050197835
ABSTRACT:
A method and apparatus for determining the extent of deflections of a movable diaphragm in a capacitive displacement type transducer. The transducer circuit is connected to a three terminal capacitive type transducer, and produces an output which is essentially of stray capacitances, circuit component tolerances and changes, and dimensional changes in the transducer elements caused by temperature changes. This is achieved by providing an output which is representative of the difference in the capacitances of the two transducer capacitors, nominalized by dividing by the sum of the capacitance reciprocals. The output of the transducer circuit thus represents the extent of the diaphragm deflection with all other transducer and circuit parameter variations removed.
REFERENCES:
patent: 4054833 (1977-10-01), Briefer
patent: 4092696 (1978-05-01), Boesen et al.
patent: 4093915 (1978-06-01), Briefer
patent: 4094199 (1978-06-01), Holdren et al.
patent: 4122708 (1978-10-01), Maier
patent: 4193063 (1980-03-01), Hitt et al.
patent: 4211971 (1980-07-01), Kobayashi et al.
patent: 4292632 (1981-09-01), Yeakley
patent: 4295376 (1981-10-01), Bell
patent: 4336718 (1982-06-01), Washburn
patent: 4386312 (1983-05-01), Briefer
patent: 4392382 (1983-07-01), Myers
patent: 4392383 (1983-07-01), Bauerlen et al.
patent: 4398194 (1983-08-01), Johnston
patent: 4509007 (1985-04-01), Barsotti et al.
patent: 4584885 (1986-04-01), Cadwell
patent: 4791352 (1988-12-01), Frick et al.
Dresser Industries Inc.
Eisenzopf Reinhard J.
Mueller Robert W.
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