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Measurement of the temperature-dependent output of lead zirconate titanate transducers

Bakaric, M; Fromme, P; Hurrell, A; Rajagopal, S; Miloro, P; Zeqiri, B; Cox, BT; (2021) Measurement of the temperature-dependent output of lead zirconate titanate transducers. Ultrasonics , Article 106378. 10.1016/j.ultras.2021.106378. (In press).

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Abstract

The effect of temperature and electrical drive conditions on the output of lead zirconate titanate (PZT) transducers is of particular interest in ultrasound metrology and medical ultrasound applications. In this work, the temperature-dependent output of two single-element PZT transducers was measured between 22 °C and 46 °C. Two independent measurement methods were used, namely radiation force balance measurements and laser vibrometry. When driven at constant voltage using a 50 matched signal generator and amplifier using continuous wave (CW) or quasi-CW excitation, the output of the two transducers increased on average by 0.6% per degree, largely due to an increase in transducer efficiency with temperature. The two measurement methods showed close agreement. Similar trends were observed when using single cycle excitation with the same signal chain. However, when driven using a pulser (which is not electrically matched), the two transducers exhibited different behaviour depending on their electrical impedance. Accounting for the temperature-dependent output of PZT transducers could have implications for many areas of ultrasound metrology, for example, in therapeutic ultrasound where a coupling fluid at an increased or decreased temperature is often used.

Type: Article
Title: Measurement of the temperature-dependent output of lead zirconate titanate transducers
DOI: 10.1016/j.ultras.2021.106378
Publisher version: http://dx.doi.org/10.1016/j.ultras.2021.106378
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Laser vibrometry, Metrology, PZT, Radiation force balance, Transducer, Ultrasound
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10121176
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