Magnetic resonance diffusion imaging with eddy-current compensation A method for eddy current compensated diffusion imaging using magnetic resonance is used to obtain a spin echo signal in a readout time window by excitatio... MP* Griffin,KL* Mcmahon,SE* Rose 被引量: 0发表: 2005年 Analytical ...
In the framework of a collaborative project with EADS, a semi-analytical model based on a volume integral method has been developed to simulate eddy current (EC) inspection of riveted structures in aeronautics. The model handles a layered structure by considering a dyadic Green's approach where ...
where Ø is magnetic flux in Webers. The unit of Flux density is Teslas = Webers per square meter. In this paper B represents flux density. Eddy Current and Skin Effect Eddy current results from changing magnetic fields within a conductor. Skin Effect results from circulating eddy currents,...
However, due to economic reasons, at this time, eddy current separation technique is used mainly for the separation of aluminum cans made of this metal are widely used. Table 3.2. Electrical Conductivity/Mass Density ratio for Various Nonferrous Metals MetalElectrical conductivity, σ (108 mho/m)...
can be used as a reference system. The necessity of a compact and highly accurate reference system is related to the material dependent accuracy behaviour of eddy current sensors. With a digital gauge the end user can either prove the accuracy of an eddy current sensor or linearise the sensor...
effect of the electromagnetic field,it is noticeable that PEC can implement the inspection of a defect in the infinite depth.Because of the difference of excitation methods,methods used for signal analysis in the EC testing may not be suitable for the PEC testing,and new ones should be ...
The surfaces need minimal preparation as Eddy current testing can be used through several millimetres of coating and can detect very small cracks in or near the surface of the material. Most Eddy Current testing equipment is portable meaning that it is easier for physically complex geometries to ...
Proximity effect and eddy current losses in insulated cables Insulated cables are generally designed according to thermal criteria: the current rating depends on the permissible temperature inside the insulation. As ... K Ferkal,M Poloujadoff,E Dorison - 《IEEE Transactions on Power Delivery》 被...
An axial displacement amplified eddy current damper is disclosed. The axial movement of a slide bar is converted into the rotation of copper sheets and generates eddy current for energy consumption. The copper sheets are rotated and amplified by adjusting the sizes of gears. The short displacement...
The heating property of eddy currents is used in induction heating. Other applications of eddy currents includes, but not limited to electromagnetic braking, metal detection, magnetic levitation, vibration & position sensing and non-destructive sensing. Eddy current loss As mentioned above, the power ...