Autors: Zhivkov, I. T., Yordanov, R. S., Dobrikov, G. H., Yordanova, I. R., Weiter, M.
Title: Computer Controlled System for Impedance Measurements
Keywords: Buffer amplifiersClocksElectric impedance measurementIonic liquidsPersonal computersSignal distortion

Abstract: Setup for impedance measurement based on AD5933 impedance convertor was accomplished and tested with a measurement of control samples. Introducing an external clock generator allows to extend the excitation frequencies in the range of 1 00 Hz÷50 KHz. An external analog front end schematics was added to reduce the output impedance and facilitate the measurement. The external analog front end includes low pass filter, voltage follower and current to voltage convertor. The measurement performed is in a good agreement with data taken from control impedance analyzer. The noise and signal distortion is considerable reduced using galvanic insulation between the personal computer and microcontroller from one side and the AD5933 impedance converter and the analog front end from the other. The relative error with respect to reference calibration resistors is within the range of ±0.5 %. A stability test shows that the change of the impedance with the time is less than 10 %, measured over 60 hour

References

    Issue

    Proceedings of the International Spring Seminar on Electronics Technology 2019, 2019, Poland, ISBN ISBN:978-1-7281-1875-8

    Цитирания (Citation/s):
    1. Ehlich, J., Zhivko, I., Yordanov, R., Salyk, O., Weiter, M., Optimized Impedance Measurement with AD5933, Proceedings of the International Spring Seminar on Electronics Technology 2020-May - 2020 - в издания, индексирани в Scopus или Web of Science
    2. Istanbullu, M., Avci, M., An ANN-Based Single Calibration Impedance Measurement System for Skin Impedance Range, IEEE Sensors Journal 21(3),9187654, pp. 3776-3783 - 2021 - в издания, индексирани в Scopus или Web of Science

    Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus и Web of Science