Acoustic Monitoring of Plasma Arcs in Direct Current Electric Arc Furnaces
MetadataShow full item record
In this article, the extraction of features from acoustic signals generated by a 60-kW direct current electric arc furnace and the use of these features to infer the arc length of the plasma jets in the furnace were considered. A sensor capable of such measurements would be more robust to the unobservable fluctuations of the arc length and would, in principle, allow better control of smelting operations. The collected data comprised sets of five separate 10-second recordings of the acoustic signal, furnace current, and voltage, each at nominal arc lengths of 5, 15, and 25 mm. In the approach, time-frequency features initially were obtained through filter bank analysis of the signals. Reduction of the dimensionality of these filter bank features was then performed using a nonlinear subspace method called kernel Fisher discriminant analysis.Finally, kernel discriminant features were used to infer the arc length via a nearest neighborclassification model that associated three classes of arc lengths (5, 15, and 25 mm) with theircorresponding features. The results of the small number of experiments suggest that a significantstatistical relationship exists between the length of a plasma arc and its acoustic signal despitepotentially large variations in arc phenomena inside the furnace.
Showing items related by title, author, creator and subject.
Parsons, Miles James Gerard (2009)Techniques of single- and multi-beam active acoustics and the passive recording of fish vocalisations were employed to evaluate the benefits and limitations of each technique as a method for assessing and monitoring fish ...
The measurement of underwater acoustic noise radiated by a vessel using the vessel's own towed arrayDuncan, Alexander John (2003)The work described in this thesis tested the feasibility of using a towed array of hydrophones to: 1. localise sources of underwater acoustic noise radiated by the towvessel, 2. determine the absolute amplitudes of these ...
Kloser, Rudolf J (2007)The background to this thesis is Australia’s Oceans Policy, which aims to develop an integrated and ecosystem-based approach to planning and management. An important part of this approach is the identification of natural ...