Temperature Compensation Method for Piezoelectric Self Sensing Actuators
E. Grasso, H. Janocha
Universität des Saarlandes, Saarbrücken, Germany
Piezoelectric vibration applications often experience temperature variations due to environmental changes as well as self heating of the piezoelectric actuators. It is well known that piezoelectric materials change their parameters when subjected to temperature changes. Therefore self sensing techniques can be strongly disturbed as they are based on certain parameters of the piezoelectric self sensing actuator. This paper addresses the problem of measuring the temperature of self sensing piezoelectric transducers without the usage of additional sensor elements. By adding a third wire soldered on the negative electrode, one can measure the temperature of the piezoelectric electrode by means of the Seebeck effect. An electronic circuit capable of measuring simultaneously voltage, charge and temperature of a piezoelectric material is then presented. Finally experimental results demonstrate the effectiveness of the proposed approach.
ACTUATOR 2014 Manuskript Poster 74
Publication date: 26/05/2015
Manuscript Poster 74 published in Conference Proceedings ACTUATOR 2014
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