Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1996-08-27
2000-05-02
Brown, Glenn W.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324444, 324672, 324688, 73 6143, G01N 2722, G01N 3322
Patent
active
060576936
ABSTRACT:
The composition of an electrically conductive mixture, such as 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 an applied voltage through a resistor. 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 applied voltage through the resistor. A first operational state peak voltage is measured during the first operational state, and a second operational state peak voltage is measured during the second operational state. The first operational state peak voltage and a preselected constant proper fraction of the second operational state peak voltage are summed to obtain a summed voltage output, which may be correlated to the composition of the mixture.
REFERENCES:
patent: 5134381 (1992-07-01), Schmitz
patent: 5343156 (1994-08-01), Johnson
patent: 5345183 (1994-09-01), Take
patent: 5589778 (1996-12-01), Ono
Brauninger John M.
McHardy John
Megerle Clifford A.
Murphy J. Brian
Townsend Carl W.
Alkov Leonard A.
Brown Glenn W.
Lenzen, Jr. Glenn H.
Raufer Colin M.
Raytheon Company
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