18 May 2004 – Australia Post issued stamps recognising five Australian Innovations, and featured these innovations to illustrate and celebrate the spirit and culture of Australian innovation1. This stamp issue suggests that, while ‘they may not be Australia’s best known innovations, they are now part of everyday life, not just in Australia, but around the world’. One of the five, ‘Ultrasound Im...

The distorted Born iterative method (DBIM) is applied to solve electromagnetics and ultrasonics inverse scattering problems. First, we use the DBIM to process the data, which are the scattered fields from two-dimensional cylinders with arbitrary cross section. From this simulation, we confirmed that the first-order Born approximation can be applied to larger objects as long as the phase change ...

A very short introduction of the principles of light diffraction by ultrasonic waves is followed by a discussion of acousto-optic imaging (schlieren) techniques. This method is often useful to obtain qualitative results of various acoustic phenomena in ultrasonics, underwater sound, material characterization, transducer performance and other areas of acoustics. Examples from different fields of...

Completed unplanned but promising • experimentation on the use of ultrasonics for pressing of low-temperature (Nafion) MEAs. Submitted two publications for review based on • early unplanned experimentation and testing of low-temperature MEAs produced with both thermal pressing and ultrasonic pressing. Completed modifications of commercial ultrasonic • press and construction of custom tooling fo...

The National Bureau of Standards (NBS) is beginning to provide a mechanism for traceability for a number of NDE measurement procedures, an activity that is expected to have a significant, positive impact on the reproducibility and accuracy of NDE measurements. Much of the NDE standards activity has been in ultrasonics and acoustic emission, this effort leading to calibration services for ultras...

An automated sensor has been developed for use in paper manufacturing and for demonstration on a full scale paper machine during commercial operation. This laser ultrasonic sensor provides non-contact and on-line measurement of the elastic properties of paper and paperboard. It was tested on a pilot web handler at web speeds up to 12.7 m/s. Measurements of flexural rigidity and out-of-plane she...

In this investigation, a T-shaped aluminum alloy isogrid stiffener element used in aerospace applications was inspected with ultrasonic phased array methods. The isogrid stiffener element had various crack configurations emanating from bolt holes. Computational simulation methods were used to mimic the experiments in order to help understand experimental results. The results of this study indic...