Picture of athlete cycling

Open Access research with a real impact on health...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

Explore open research content by Physical Activity for Health...

Application of conformal map theory for design of 2-D ultrasonic array structure for ndt imaging application : a feasibility study

Ramadas, Sivaram Nishal and Jackson, Joseph and Dziewierz, Jerzy and O'Leary, Richard and Gachagan, Anthony (2014) Application of conformal map theory for design of 2-D ultrasonic array structure for ndt imaging application : a feasibility study. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 61 (3). pp. 496-504. ISSN 0885-3010

[img] PDF (CMAP - FinalVersion Unformatted for IEEE)
CMAP_FinalVersion_Unformatted_for_IEEE.pdf - Accepted Author Manuscript
License: Creative Commons Attribution 4.0 logo

Download (1MB)

Abstract

Two-dimensional ultrasonic phased arrays are becoming increasingly popular in nondestructive evaluation (NDE). Sparse array element configurations are required to fully exploit the potential benefits of 2-D phased arrays. This paper applies the conformal mapping technique as a means of designing sparse 2-D array layouts for NDE applications. Modeling using both Huygens' field prediction theory and 2-D fast Fourier transformation is employed to study the resulting new structure. A conformal power map was used that, for fixed beam width, was shown in simulations to have a greater contrast than rectangular or random arrays. A prototype aperiodic 2-D array configuration for direct contact operation in steel, with operational frequency ~3 MHz, was designed using the array design principle described in this paper. Experimental results demonstrate a working sparse-array transducer capable of performing volumetric imaging.