Picture of boy being examining by doctor at a tuberculosis sanatorium

Understanding our future through Open Access research about our past...

Strathprints makes available scholarly Open Access content by researchers in the Centre for the Social History of Health & Healthcare (CSHHH), based within the School of Humanities, and considered Scotland's leading centre for the history of health and medicine.

Research at CSHHH explores the modern world since 1800 in locations as diverse as the UK, Asia, Africa, North America, and Europe. Areas of specialism include contraception and sexuality; family health and medical services; occupational health and medicine; disability; the history of psychiatry; conflict and warfare; and, drugs, pharmaceuticals and intoxicants.

Explore the Open Access research of the Centre for the Social History of Health and Healthcare. Or explore all of Strathclyde's Open Access research...

Image: Heart of England NHS Foundation Trust. Wellcome Collection - CC-BY.

Enhancing the performance of piezoelectric ultrasound transducers by the use of multiple matching layers

Mulholland, A. and Ramadas, S.N. and O'Leary, R.L. and Parr, A.C.S. and Hayward, G. and Troge, Alexandre and Pethrick, R.A. (2008) Enhancing the performance of piezoelectric ultrasound transducers by the use of multiple matching layers. IMA Journal of Applied Mathematics, 73 (6). pp. 936-949. ISSN 1464-3634

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

A linear system model is developed for a composite piezoelectric transducer with multiple matching layers. The large number of degrees of freedom in this model and the sensitivity of the device performance to these parameters make the inverse problem, of choosing these parameters to optimize the device's performance, an extremely difficult task. However, by accepting a small number of assumptions on the nature of the propagating waves in the device a Chebyshev polynomial approach is used to reduce the degrees of freedom and arrive at an algorithm for a device design. A typical device is investigated using this approach and it is shown that a threefold improvement in the device performance can be achieved over the standard single-matching-layer design. The modelling also indicated that great care has to be taken in bonding the matching layers together to ensure the homogeneity of the bonds. A transducer with four matching layers was subsequently manufactured and the experimental results show a significant improvement in the device performance, in agreement with the model predictions.