Enhancement of Quantitative Evaluation of Wire Breakage from Measured Magnetic Field with Denoising Algorithm

摘要

The wire breakage identification of the superconducting cable is a key issue to guarantee the reliability of the magnet systems of the International Thermonuclear Experimental Reactor (ITER). A NDE method based on the measurement of magnetic fields surrounding the conductors and the reconstruction of the current distribution in the superconducting cables is considered efficient for this purpose. In this paper, the influence of the arrangement of measurement points and the noise in the measured magnetic fields on the current reconstruction is investigated numerically at first. Two de-noising techniques to enhance the S/N ratio of measured signals are then proposed and evaluated. The validity and efficiency of the proposed de-noising schemes are demonstrated through a lot of numerical simulations.