Algorithm for determining the measurement signal amplitude values in conditions of interference in electrical impedance tomography

The work is devoted to the problems of processing the measuring signal in the problems of electrical impedance tomography in the conditions of interference. A typical circuit of an electrical impedance tomography device, including a measurement circuit, is considered. An algorithm for determining the amplitude values of the measured signal in ideal conditions is shown. The problem of measuring a signal with noise, the amplitude of which may exceed the amplitude of the useful signal, is considered. A method for extracting the amplitude values of the useful signal and determining the PGA gain is shown. The use of the developed measurement algorithm will make it possible to improve the quality of the measurement data in the problems of electrical impedance tomography in conditions of noise exceeding the useful signal in amplitude without introducing additional distortions.