Novel two-measurements-only Cole-Cole bio-impedance parameters extraction technique

•Simple and cheap electronic circuit to extract the 4 unknown parameters of the Cole-Cole impedance model.•The proposed technique requires two sets of measurements only.•A set of nonlinear equations fed with two data points leeds to the 4 unknown parameters.•Experimental results show very good agree...

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Bibliographic Details
Published inMeasurement : journal of the International Measurement Confederation Vol. 131; pp. 394 - 399
Main Authors Vastarouchas, C., Psychalinos, C., Elwakil, A.S., Al-Ali, A.A.
Format Journal Article
LanguageEnglish
Published London Elsevier Ltd 01.01.2019
Elsevier Science Ltd
Subjects
Amplification
Bio-electronics
Bio-impedance
Cole-Cole impedance model
Dispersion
Gain
Impedance
Nonlinear equations
Oscillators
Parameters
Precision
Bio-electronics
Cole-Cole impedance model
Bio-impedance
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Summary:•Simple and cheap electronic circuit to extract the 4 unknown parameters of the Cole-Cole impedance model.•The proposed technique requires two sets of measurements only.•A set of nonlinear equations fed with two data points leeds to the 4 unknown parameters.•Experimental results show very good agreement with standard expensive impedance analyzers. We introduce a novel and simple experimental technique to extract all four parameters of a single dispersion Cole-Cole impedance model by performing two measurements only. The method is centered around embedding the unknown impedance within an electronic sinusoidal oscillator network and then measuring at two different oscillation frequencies the start-up amplifier gain. Subsequently, solving together a set of nonlinear equations yields all four unknowns. The accuracy of the method is experimentally assessed in comparison with measurements using a precision impedance analyzer.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2018.09.008