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Sci Rep. 2017 Nov 06;7(1):14502. doi: 10.1038/s41598-017-15131-z.

Metal Solidification Imaging Process by Magnetic Induction Tomography.

Scientific reports

Lu Ma, Stefano Spagnul, Manuchehr Soleimani

Affiliations

  1. University of Bath, Engineering Tomography Laboratory, Department of Electronic and Electrical Engineering, Bath, BA2 7AY, UK. [email protected].
  2. Ergolines lab s.r.l., Area Science Park, Bldg. R3 Padriciano, Trieste, 34149, Italy. [email protected].
  3. University of Bath, Engineering Tomography Laboratory, Department of Electronic and Electrical Engineering, Bath, BA2 7AY, UK. [email protected].

PMID: 29109419 PMCID: PMC5673972 DOI: 10.1038/s41598-017-15131-z

Abstract

There are growing number of important applications that require a contactless method for monitoring an object surrounded inside a metallic enclosure. Imaging metal solidification is a great example for which there is no real time monitoring technique at present. This paper introduces a technique - magnetic induction tomography - for the real time in-situ imaging of the metal solidification process. Rigorous experimental verifications are presented. Firstly, a single inductive coil is placed on the top of a melting wood alloy to examine the changes of its inductance during solidification process. Secondly, an array of magnetic induction coils are designed to investigate the feasibility of a tomographic approach, i.e., when one coil is driven by an alternating current as a transmitter and a vector of phase changes are measured from the remaining of the coils as receivers. Phase changes are observed when the wood alloy state changes from liquid to solid. Thirdly, a series of static cold phantoms are created to represent various liquid/solid interfaces to verify the system performance. Finally, a powerful temporal reconstruction method is applied to realise real time in-situ visualisation of the solidification and the measurement of solidified shell thickness, a first report of its kind.

References

  1. Sci Rep. 2015 Jan 22;5:7944 - PubMed

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