Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1996-08-28
1998-02-10
Regan, Maura K.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324663, 324644, G01R 2726
Patent
active
057173397
ABSTRACT:
The composition of an electrically conductive mixture, preferably a mixture of gasoline and alcohol, is measured using a single measurement cell having a first electrode and a second electrode with a measurement space therebetween for receiving a specimen of the mixture. With a specimen of the mixture in the measurement space, the first electrode is alternatively connected to a reference discharge voltage, preferably ground, and to a feedback control voltage. A first operational state encompasses the period when the first electrode is connected to the reference discharge voltage and a second operational state encompasses the period when the first electrode is connected to the feedback control voltage. A first operational state peak voltage is measured during the first operational state, and a peak second operational state voltage is measured during the second operational state. The first operational state voltage and a preselected constant proper fraction of the peak second operational state voltage are mathematically combined to obtain a voltage output, which may be correlated to the composition of the mixture. The voltage output is also used as the feedback control voltage, to produce a linear signal output as a function of dielectric constant of the conductive mixture.
REFERENCES:
patent: 5231358 (1993-07-01), Kapsokavathis
patent: 5345183 (1994-09-01), Take
patent: 5365783 (1994-11-01), Zweitel
patent: 5367264 (1994-11-01), Brabetz
patent: 5589778 (1996-12-01), Ouo et al.
Brauninger John M.
McHardy John
Megerle Clifford A.
Murphy J. Brian
Townsend Carl W.
Denson-Low Wanda K.
HE Holdings Inc.
Lindeen III Gordon R.
Regan Maura K.
Sales Michael W.
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