Spectroscopic impedance measurement front-end for applications in industrial processes

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The determination and differentiation of various materials is of great interest in numerous applications. For this purpose, spectroscopic impedance measurement systems are applied. The frequency dependent impedance analysis enables a detailed material investigation and an assessment of its composition e. g. the moisture content. By applying impedance measurement systems in industrial environments conditions as high temperatures, high pressures or vibrations have to be considered. In this paper we present a front-end topology intended to be used for frequency spectroscopic based measurement systems, deployed in industrial environments. The impedance measurement capability of the proposed system is investigated by means of a realized prototype. We present results obtained for measurement frequencies up to 50MHz and address calibration strategies, which improve the robustness. The measurement electronics is also characterized over the environmental temperature range.
Translated title of the contributionSpektroskopisches Frontend für Impedanzmessungen in industriellen Anwendungen
Original languageEnglish
Pages (from-to)133-146
JournalTechnisches Messen
Issue number3
Publication statusPublished - 2021

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