Results 241 to 250 of about 88,049 (302)
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1982
A new concept, phasography, has been developed showing excellent potential for high resolution imaging of flaws using eddy current data. The process may be thought of as an eddy current equivalent to acoustic holography. Phase multiplication of the detected coherent signal is used to simulate a test wavelength one to two orders of magnitude smaller ...
H. Dale Collins +3 more
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A new concept, phasography, has been developed showing excellent potential for high resolution imaging of flaws using eddy current data. The process may be thought of as an eddy current equivalent to acoustic holography. Phase multiplication of the detected coherent signal is used to simulate a test wavelength one to two orders of magnitude smaller ...
H. Dale Collins +3 more
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2018
In eddy current tomography, the conductivity profile of conductive materials is reconstructed through the inversion of eddy current data (ECT). The state of the art of imaging methods in ECT data inversion is represented by iterative methods, the drawbacks of which are their high computational cost and the risk of becoming trapped in false solutions ...
a. tamburrino, g. rubinacci
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In eddy current tomography, the conductivity profile of conductive materials is reconstructed through the inversion of eddy current data (ECT). The state of the art of imaging methods in ECT data inversion is represented by iterative methods, the drawbacks of which are their high computational cost and the risk of becoming trapped in false solutions ...
a. tamburrino, g. rubinacci
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Physics Education, 1992
The eddy current effect can be demonstrated in a striking, simple and cheap way by comparing the time it takes a magnet to drop down a length of copper tubing with the time for an apparently identical but non-magnetic sample.
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The eddy current effect can be demonstrated in a striking, simple and cheap way by comparing the time it takes a magnet to drop down a length of copper tubing with the time for an apparently identical but non-magnetic sample.
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Proceedings of the Institution of Electrical Engineers, 1976
After giving a general survey on the earlier papers dealing with the eddy currents transients the author specifies his basic 1-dimensional theoretical model. Then the theory of transients both with ideal constant-current source and voltage source as supply is developed. The analysis presented involves the effect of the airgap in the magnetic circuit as
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After giving a general survey on the earlier papers dealing with the eddy currents transients the author specifies his basic 1-dimensional theoretical model. Then the theory of transients both with ideal constant-current source and voltage source as supply is developed. The analysis presented involves the effect of the airgap in the magnetic circuit as
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Eddy Current Loss Calculation for Permanent Magnet Eddy-current Coupler
2020 7th International Conference on Information Science and Control Engineering (ICISCE), 2020This paper presents an analytical method for calculating the eddy current loss of permanent magnet eddy-current coupler (PMEC). A magnetic equivalent circuit (MEC) model considering the eddy current effect and leakage is established. Then, based on Kirchhoff’s law and Ampere’s law of loop, the flux density passing through the conductor rotor and the ...
Wei Liu +5 more
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Aircraft Engineering and Aerospace Technology, 1986
Eddy current testing is a general term for the inspection of conductive materials using an induced electro‐magnetic field. The flow of this field is affected by the presence of defects within the material and the charges are detected by suitable instruments which reveal their location and nature.
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Eddy current testing is a general term for the inspection of conductive materials using an induced electro‐magnetic field. The flow of this field is affected by the presence of defects within the material and the charges are detected by suitable instruments which reveal their location and nature.
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1995
Eddy current analysis is essential in determining the behavior of electric machines. In some classes of machinery, such as induction motors, eddy currents are responsible for producing the main torque. In other situations an analysis of eddy currents is necessary to find losses, resistance and reactance (see chapter 5).
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Eddy current analysis is essential in determining the behavior of electric machines. In some classes of machinery, such as induction motors, eddy currents are responsible for producing the main torque. In other situations an analysis of eddy currents is necessary to find losses, resistance and reactance (see chapter 5).
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1997
The eddy current method of non-destructive testing, as currently practised, was pioneered by Friedrich Forster in the 1940s, and there has since been rapid progress in its development. Eddy current tests can be made on all materials which are electrically conducting.
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The eddy current method of non-destructive testing, as currently practised, was pioneered by Friedrich Forster in the 1940s, and there has since been rapid progress in its development. Eddy current tests can be made on all materials which are electrically conducting.
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2001
The eddy current non-destructive inspection technique can be used effectively on fibre metal laminates. It uses the principle of electromagnetic induction, i.e. the interaction between a magnetic field with an electrically conductive object. With this method, the different Fibre Metal Laminate types can be easily discriminated and fatigue cracks in the
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The eddy current non-destructive inspection technique can be used effectively on fibre metal laminates. It uses the principle of electromagnetic induction, i.e. the interaction between a magnetic field with an electrically conductive object. With this method, the different Fibre Metal Laminate types can be easily discriminated and fatigue cracks in the
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