An Eddy Current Sensor for the Measurement of Resistivity and Temperature of Aluminum Rod during Extrusion Processing
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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
Optimization of the speed of production and the control of quality of extruded aluminum products requires the measurement of the temperature of the extruded product during processing. This temperature measurement should be by a non-contact sensor placed as close as possible to the extrusion die, and the measurement should be accomplished and reported with sufficient rapidity to be used in a feedback control loop. For this purpose, an eddy current sensor which performs an on-line measurement of resistivity and converts the measurement to the corresponding temperature has been developed. This project is being conducted jointly by The Aluminum Association and the National Bureau of Standards.