Bioimpedance Measurement

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    02-Feb-2016
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Dept. of Biomedical Engineering 2003200449 YOUNHO HONG. Bioimpedance Measurement. Impedance measure. i=0. measured. known. i=0. constant current source. +. reactance. Z. impedance. resistance. -. Impedance measure. (Example). Im. 1. 1+j. 1. Re. - PowerPoint PPT Presentation

Transcript of Bioimpedance Measurement

  • Bioimpedance MeasurementDept. of Biomedical Engineering2003200449YOUNHO HONG

  • Impedance measure

  • Impedance measure(Example)You are given with i(t) = I sin(2ft)You measure v(t) = V sin(2ft+)

  • Impedance measure(Example)

  • Impedance measure

  • Impedance measure

  • Impedance measureIn-phase Component

  • Impedance measureQuadrature Component

  • Impedance measure

  • Two-electrode MethodVZC1ZC2ZbInject current and then measure voltage

  • Two-electrode Method

  • Four-electrode Method

  • Three-electrode MethodWe can measure skin impedanceusing Three and Four electrode Method

  • Noise Effect

  • Spectrum Analizer DFT

  • Bio Impedance SpectroscophyRepeat measurement for many frequencies f

  • Thank you.

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