Determination of the Absolute Sensitivity Limit of a Piezoelectric Displacement Transducer

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1996
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Boltz, E.
Fortunko, C.
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

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

Many ultrasonic techniques, such as conventional acoustic emission [1], waveform-based acoustic emission [2] and ultrasonic testing of high-stiffness reinforcing fibers [3], require highly sensitive, broadband, displacement transducers. Optical probes, such as interferometers, offer both large dynamic range and a very wide bandwidth, but do not exhibit the sensitivity needed for such applications [4, 5]. Piezoelectrics, on the other hand, have approximately 40 dB higher sensitivity than optical probes and can be designed to exhibit an acceptably wide bandwidth [6, 7]. In our applications we typically use transducers that exhibit flat frequency response from 10 kHz to 1 MHz on metals. This paper details a procedure by which the noise floor of one of our “HFHS”, piezoelectric transducers can be measured and compared to a model.

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Mon Jan 01 00:00:00 UTC 1996