Author(s)

L. Battisti, E. Bertolazzi & F. Trivellato

Abstract

Numerical processing of thin–film sensor temperature data L. Battisti1, E. Bertolazzi1 & F. Trivellato2 1 Department of Mechanical and Structures Engineering, 2 Department of Civil and Environmental Engineering, University of Trento, Italy Abstract A thin-film sensor operating in transient mode in principle enables very accurate temperature measurements to be obtained, e. g. in turbine blades, because of the high frequency of its response; however, the complexity of data processing is the major drawback for popular use of the sensor. In this study new data processing methods are presented, including a comprehensive 1–D finite element model which is convenient both for its capability of dealing with general boundary conditions and for the low computational cost as compared to present transform–based methods. This method can also tackle single-, double- and multi-layer sensors, can support temperature dependent quantities and proves successful in processing prototype signals in a wide range of

Keywords