Recent Results in Nondestructive Testing with Electromagnetic Ultrasonic Transducers
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
Electromagnetic ultrasonic transducers (EMUS) are a broad class of ultrasonic transducers that open new possibilities in the field of nondestructive testing. The reasons are: they don!t need liquid couplants; they can be designed to operate at elevated temperatures and to scan at high speed. They can provide a large variety of bulk and guided wave modes including shear waves with horizontal polarization, and their operating characteristics are easily reproducible. All these and other advantages are faced with a general disadvantage of a larger insertion loss than conventional transducers. However proper sensor and electronic design permits sufficient signal-to-noise levels to be achieved. When properly designed and instrumented an EMUS-based ultrasonic system can be used for many practical applications.