Electrical impedance detecting device of portable electrical impedance imaging system and detecting method thereof

摘要: An electrical impedance detecting device of a portable imaging system by utilizing theory sending excitation signal and response method thereof, wherein the is constant square wave current signal, voltage on target transformed to with appropriate amplitudes buffering, amplifying, RC filtering differential amplifying circuits, then digital at proper time an analog-to-digital converter. The sampled once when high level low for every circle ADC, sample V1 V2 are obtained respectively, difference taken as result one circle. average value from plurality circles may be final result. Information illustrated because constant.