Measurement of Piezoelectric Transformer Vibrations by Digital Holography

0439652 - ÚFP 2015 RIV US eng J - Článek v odborném periodiku
Psota, Pavel - Lédl, Vít - Doleček, Roman - Erhart, J. - Kopecký, V.
Measurement of Piezoelectric Transformer Vibrations by Digital Holography.
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. Roč. 59, č. 9 (2014), s. 1962-1968. ISSN 0885-3010. E-ISSN 1525-8955
Grant CEP: GA MŠMT(CZ) ED2.1.00/03.0079
Institucionální podpora: RVO:61389021
Klíčová slova: digital holographic * ime-averaged holographic * small amplitude * vibrations amplitude measurement * piezoelectric transformers
Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika
Impakt faktor: 1.512, rok: 2014

A method for the measurements of the out-of-plane displacement on the surface of vibrating object is presented herein. This method is based on frequency-shifted time-averaged digital holographic interferometry, employing the principle of phase shifting. This approach allows for significant noise reduction, which results in high sensitivity of measurements. This method makes it possible to measure vibrations with amplitudes in the nanometer range over the whole measured surface. This method was applied to the visualization of the out-of-plane vibration modes of piezoelectric transformers. The amplitude and modal shapes were measured with a very high resolution. Furthermore, aspects influencing the measurement errors are discussed and the measurement results by holographic method were compared with the well-established single-point laser interferometry measurement method.
Trvalý link: http://hdl.handle.net/11104/0242866