Dynamic characterization of a multi-component force transducer using a Lorentz force load changer
Jan Schleichert, Matthias Carlstedt, Rafael R. Marangoni, Ilko Rahneberg, Thomas Fröhlich · Common Library Network (Der Gemeinsame Bibliotheksverbund) · 2014
Strain gauge based force transducers are often used in applications that require the measurement of static or quasi-static forces.For these measurements a static calibration is sufficient.In dynamic measurements however, the measurement deviation caused by using static calibration coefficients increases when approaching the resonance frequency of the sensor.This paper deals with the dynamic characterization of a multi-component force sensor used in Lorentz force eddy current testing, a measurement principle that is based on the measurement of dynamic force reactions.For the dynamic calibration a system is presented that allows the use of various test signals to determine the system parameters of the force transducer.Measurement results for different test signals are shown and main sources of error are discussed.Based on the estimated parameters, an inverse filter [1] can be designed to calculate the dynamic force from the measured output voltages of the sensor.