Bioimpedance Measurement
date post
02-Feb-2016Category
Documents
view
54download
1
Embed Size (px)
description
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.
*****************
