The Fourth Military Medical University

Jiaxue Qi

Bin Yang

Nan Wang

Min Yang

Wen Zhang

Xuyang Huo

Ruigang Liu

Zhenyu Ji

Fusheng You

Canhua Xu

Xuetao Shi

Xiuzhen Dong

Feng Fu

A device for detecting electrical impedance by utilizing a theory of excitation and response signals and method thereof, wherein the excitation signal is a square wave excitation current signal (), the response signal on a target is transformed to a square wave signal with appropriate amplitudes by buffering, amplifying, RC filtering and differential amplifying, then is transformed to a digital signal at a proper time by an analog-to-digital converter. The response signal is sampled once when at high level and once when at low level for every circle by the ADC, and a sample Vand a sample Vare obtained respectively, difference of the samples is taken as a detecting result for one circle. An average value of the detecting result from a plurality of circles is taken as a final result. Information of electrical impedance is illustrated by the final result because the excitation current signal is constant.

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

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Xi'an, China

Jiaxue Qi