Title:
Time Varying Electrical Conductivity Tester Using Frequency Discrimination And Power Detector And Methods Thereof

dc.contributor.patentcreator Feeney, Robert K.
dc.contributor.patentcreator Rohatgi, Ajeet
dc.contributor.patentcreator Hertling, David R.
dc.date.accessioned 2017-05-12T14:27:13Z
dc.date.available 2017-05-12T14:27:13Z
dc.date.filed 3/28/1994
dc.date.issued 2/27/1996
dc.description.abstract An electrical conductivity tester accurately measures the time-varying electrical conductivity σ(t) and steady-state electrical conductivity σ ss, of a test material. In a first embodiment, the transmission phase of a probe circuit is monitored to determine the conductivity of a test material. In the first embodiment, an oscillator circuit generates a reference oscillator signal. A probe circuit receives the reference oscillator signal, magnetically couples to the test material, and modifies the reference oscillator signal via electromagnetic induction to derive a modified transmission phase signal. Finally, a phase detector circuit derives a transmission phase signal by combining the reference oscillator signal and the modified transmission phase signal, the transmission phase signal being directly convertible to the conductivity. In a second embodiment, an amplifier is connected to the probe circuit to form an oscillator circuit. The oscillator circuit generates an oscillator signal in response to the magnetic coupling of the probe circuit with the test material. A frequency discriminator generates a frequency signal from the oscillator signal, the frequency signal being convertible to the conductivity.
dc.description.assignee Georgia Tech Research Corporation
dc.identifier.cpc G01N27/023
dc.identifier.cpc G01R31/2648
dc.identifier.cpc G01R27/02
dc.identifier.patentapplicationnumber 08/218805
dc.identifier.patentnumber 5495170
dc.identifier.uri http://hdl.handle.net/1853/57207
dc.identifier.uspc 324/236
dc.title Time Varying Electrical Conductivity Tester Using Frequency Discrimination And Power Detector And Methods Thereof
dc.type Text
dc.type.genre Patent
dspace.entity.type Publication
local.contributor.corporatename Georgia Institute of Technology
local.relation.ispartofseries Georgia Tech Patents
relation.isOrgUnitOfPublication cc30e153-7a64-4ae2-9b1d-5436686785e3
relation.isSeriesOfPublication 0f49c79d-4efb-4bd9-b060-5c7f9191b9da
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