scholarly journals Theory and numerical calculation of the acoustic field exerted by eddy-current forces

1976 ◽  
Author(s):  
K. Kawashima
Keyword(s):  
Numerical Calculation ◽  
Acoustic Field ◽  
Eddy Current

A Working of Eddy Current Transducers under Control of Ferromagnetic Pipes in Condition of Insufficient Magnetic Saturation

2013 ◽  
Vol 467 ◽  
pp. 528-530
Author(s):  
Kai Yu Hao ◽  
Vadim Miroshnikov
Keyword(s):  
Electromagnetic Field ◽  
Numerical Calculation ◽  
Eddy Current ◽  
Maxwell Equations ◽  
Control Sample ◽  
Magnetic Saturation ◽  
Method Of Calculation ◽  
Current Transducer ◽  
Object Of Control ◽  
Eddy Current Transducer

The numerical method of calculation of electromagnetic field in a control sample at a time of work of encircling eddy current transducer is offered. The method is based on a numerical solution of the two Maxwell equations, which connect a change of electrical and magnetic fields. It allows to make calculations taking into account the actual value of magnetic inductivity of metal and to get results in any form, convenient for further interpretations. For the calculation of the encircling eddy current transducer the equivalent circuit of defect as step junction is offered. The numerical calculation shows, that the greatest sensitivity of the transducer is achieved when the value of magnetic permeability of the object of control is approximately 10-30. Therefore, it is not necessary to lead the material of the object of control up to satiety, as it considered before.

scholarly journals Дифракция света на ультразвуке в пространственно периодическом акустическом поле

2019 ◽  
Vol 127 (10) ◽  
pp. 660
Author(s):  
В.И. Балакший ◽  
М.И. Купрейчик ◽  
С.Н. Манцевич
Keyword(s):  
Numerical Calculation ◽  
Acoustic Field ◽  
Piezoelectric Transducer ◽  
Acoustic Mode ◽  
Light Diffraction ◽  
Acoustooptic Interaction ◽  
Paratellurite Crystal ◽  
Spatially Periodic ◽  
A Cell

AbstractCharacteristic features of anisotropic light diffraction in a spatially periodic acoustic field created by a sectioned piezoelectric transducer with antiphase excitation of adjacent sections are studied theoretically. The numerical calculation is carried out for a cell of a paratellurite crystal with a shear acoustic mode propagating at an angle of 3° to the (001) plane of the crystal. It is shown that this type of acoustooptic interaction has some interesting features that can be used when developing acoustooptic devices, in particular, modulators of nonpolarized light.

Measurement and Numerical Calculation of Force on a Particle in a Strong Acoustic Field Required for Levitation

2009 ◽  
Vol 48 (7) ◽  
pp. 07GM09 ◽  
Author(s):  
Teruyuki Kozuka ◽  
Kyuichi Yasui ◽  
Toru Tuziuti ◽  
Atsuya Towata ◽  
Judy Lee ◽  
...  
Keyword(s):  
Numerical Calculation ◽  
Acoustic Field
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