Identification of the mechanical properties of the skin by electromechanical impedance analysis of resonant piezoelectric actuator

Łukasz Sienkiewicz; Jean-Francois Rouchon; Mieczysław Ronkowski; Grzegorz Andrzej Kostro; Roland Ryndzionek

doi:10.1109/iecon.2013.6699765

Identification of the mechanical properties of the skin by electromechanical impedance analysis of resonant piezoelectric actuator

Abstract

This paper is devoted to the analysis and verification of developed piezoelectric sensor/actuator for measuring the mechanical properties of soft tissues, especially human skin. The key element of the measurement structure is an electromechanical system that uses both the reverse piezoelectric effect (vibration generation – stimulation of the tissues in the appropriate frequency range) and direct piezoelectric effect (system response registration). By analyzing the response of the piezoelectric sensor/actuator - an electromechanical signature of the tested tissue, it is possible to identify a series of mechanical quantities describing the tested object, such as stiffness, viscosity, Young's modulus. An analytical approach is shown in order to establish a link between the electromechanical equivalent circuit obtained for a resonance frequency of the actuator and the calculations based on the Hertz’s contact mechanics theory. A finite element method analysis is then presented in order to assess the performance of the chosen topology of piezoelectric sensor/actuator. Finally, the proposed method of impedance characterization is verified experimentally by a prototype of piezoelectric bimorph sensor/actuator.

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Authors (5)

Łukasz Sienkiewicz dr inż.
Jean-Francois Rouchon
- INP - ENSEEIHT Toulouse Laboratoire Plasma et Conversion d'Energie (LAPLACE)
Mieczysław Ronkowski dr hab. inż.
Grzegorz Andrzej Kostro dr inż.
Roland Ryndzionek dr inż.

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Category:: Conference activity
Type:: materiały konferencyjne indeksowane w Web of Science
Title of issue:: Proceedings of the IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society (IECON) strony 3938 - 3943
Language:: English
Publication year:: 2013
Bibliographic description:: Sienkiewicz Ł., Rouchon J., Ronkowski M., Kostro G., Ryndzionek R..: Identification of the mechanical properties of the skin by electromechanical impedance analysis of resonant piezoelectric actuator, W: Proceedings of the IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society (IECON), 2013, Institute of Electrical and Electronics Engineers (IEEE), Industrial Electronics Society (IES) ,.
DOI:: Digital Object Identifier (open in new tab) 10.1109/iecon.2013.6699765
Verified by:: Gdańsk University of Technology