منابع مشابه
Immersed transient eddy current flow metering: a calibration-free velocity measurement technique for liquid metals
Eddy current flow meters (ECFM) are widely used for measuring the flow velocity of electrically conducting fluids. Since the flow induced perturbations of a magnetic field depend both on the geometry and the conductivity of the fluid, extensive calibration is needed to get accurate results. Transient eddy current flow metering (TECFM) has been developed to overcome this problem. It relies on tr...
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Introduction: Local gradients enable increased gradient strength and faster slew rates, which are both highly desirable to enable high-resolution and fast, real-time imaging(1). The planar gradient set presented in (2) illustrates one such gradient system, where all three gradient axes are incorporated into a uni-planar gradient set that is positioned within the magnet bore. Planar gradients pr...
متن کاملExplicit Time Integration of Transient Eddy Current Problems
For time integration of transient eddy current problems commonly implicit time integration methods are used, where in every time step one or several nonlinear systems of equations have to be linearized with the Newton-Raphson method due to ferromagnetic materials involved. In this paper, a generalized Schur-complement is applied to the magnetic vector potential formulation, which converts a dif...
متن کاملPrediction and Analysis of Transient Eddy - Current Probe Signals
In eddy-current nondestructive evaluation, the electromagnetic field is usually excited by a probe carrying a time-harmonic current and flaw information inferred from the amplitude and phase of the probe signal. In principle, transient excitation of eddy-currents would seem to offer great advantages since the probe response contains the equivalent information of a spectrum of frequencies. This ...
متن کاملEddy current
Eddy currents (also called Foucault currents[1]) are loops of electrical current induced within conductors by a changing magnetic field in the conductor, due to Faraday’s law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by anAC el...
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ژورنال
عنوان ژورنال: Measurement Science and Technology
سال: 2015
ISSN: 0957-0233,1361-6501
DOI: 10.1088/0957-0233/26/10/105303