论文信息 - Over-zero switching scheme for fast data collection operation in electrical impedance tomography

Over-zero switching scheme for fast data collection operation in electrical impedance tomography

An electrical impedance tomography (EIT) sensor's model for analyses of the behaviour of the coupling circuits and electrode–electrolyte interface is presented. With transient time analyses of the model, a novel switching scheme, termed the over-zero switching (OZS) scheme, was designed to eliminate both the dc offset potential and the charged residual potential of measurements. The effects of the transient time in conventional and OZS coupling circuits were simulated. Both analyses and simulations revealed that the coupling time can be dramatically reduced by the employment of the OZS scheme. The technique has been used in a fast impedance tomography system to achieve a speed of more than 1000 dual-frames per second.

Yixin Ma | Mi Wang | Mi Wang | Yixin Ma

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