Experimental Evaluation of Defects in Ferromagnetic Steel Tube by Electromagnetic Sensor Using Square Wave AC Magnetic Field with DC Bias

Magnetoelectric anisotropy was researched in a disc laminate composite. The magnetoelectric coefficient exhibits a cosine characteristic with the angle between the direction of dc bias magnetic field [Formula: see text] and small ac sine magnetic signal [Formula: see text], no matter how [Formula: see text] rotates. Correspondingly, there are only two values of phase shift when the angle varies from 0 to 360[Formula: see text]. These two phase shifts only depend on [Formula: see text] mapping on [Formula: see text], i.e., sign of dot product of [Formula: see text] and [Formula: see text] [Sgn([Formula: see text])], implying that [Formula: see text]cos[Formula: see text] produces charge through the magnetoelectric effect. Then, a simple device was proposed to detect the magnitude and direction of ac magnetic field.

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Examination of Inspection Method for Outer-side Defect on Ferromagnetic Steel Tube by Velocity Effect Using Insertion-type Static Magnetic Field Sensor

Sensors and Materials ◽

10.18494/sam.2021.3463 ◽

2021 ◽

Vol 33 (8) ◽

pp. 2867

Author(s):

Makoto Tohara ◽

Masafumi Kuromizu ◽

Yuji Gotoh

Keyword(s):

Magnetic Field ◽

Static Magnetic Field ◽

Steel Tube ◽

Magnetic Field Sensor ◽

Outer Side ◽

Inspection Method ◽

Field Sensor ◽

Velocity Effect ◽

Ferromagnetic Steel

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3D analysis of inspection method of opposite side defect in steel using AC square wave magnetic field with DC bias taking account of minor loop

2016 IEEE Conference on Electromagnetic Field Computation (CEFC) ◽

10.1109/cefc.2016.7815884 ◽

2016 ◽

Author(s):

S. Yoshioka ◽

R. Naganoma ◽

E. Kuboyama ◽

Y. Gotoh

Keyword(s):

Magnetic Field ◽

3D Analysis ◽

Inspection Method ◽

Square Wave ◽

Minor Loop ◽

Dc Bias

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Analysis of magneto rheological elastomers for energy harvesting systems

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209350 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 439-446

Author(s):

Gildas Diguet ◽

Gael Sebald ◽

Masami Nakano ◽

Mickaël Lallart ◽

Jean-Yves Cavaillé

Keyword(s):

Magnetic Field ◽

Energy Harvesting ◽

Shear Strain ◽

Magnetic Induction ◽

Magnetic Particles ◽

Homogeneous Magnetic Field ◽

Electrical Signal ◽

Harvesting Systems ◽

Dc Bias ◽

Magneto Rheological

Magneto Rheological Elastomers (MREs) are composite materials based on an elastomer filled by magnetic particles. Anisotropic MRE can be easily manufactured by curing the material under homogeneous magnetic field which creates column of particles. The magnetic and elastic properties are actually coupled making these MREs suitable for energy conversion. From these remarkable properties, an energy harvesting device is considered through the application of a DC bias magnetic induction on two MREs as a metal piece is applying an AC shear strain on them. Such strain therefore changes the permeabilities of the elastomers, hence generating an AC magnetic induction which can be converted into AC electrical signal with the help of a coil. The device is simulated with a Finite Element Method software to examine the effect of the MRE parameters, the DC bias magnetic induction and applied shear strain (amplitude and frequency) on the resulting electrical signal.

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Novel Simplified Time Periodic-Explicit Error Correction Method for Steady State Analysis of AC Magnetic Field Including DC Component

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes.133.271 ◽

2013 ◽

Vol 133 (3) ◽

pp. 271-276 ◽

Cited By ~ 1

Author(s):

Hirokatsu Katagiri ◽

Yoshihiro Kawase ◽

Tadashi Yamaguchi

Keyword(s):

Magnetic Field ◽

Steady State ◽

Error Correction ◽

Correction Method ◽

Steady State Analysis ◽

Ac Magnetic Field ◽

Error Correction Method ◽

Dc Component ◽

Time Periodic ◽

State Analysis

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Experimental evaluation of forced convective heat transfer of Fe3O4 ferrofluid in a horizontal u-shaped tube under variable magnetic field effect based on Taguchi approach

Journal of the Brazilian Society of Mechanical Sciences and Engineering ◽

10.1007/s40430-021-02910-z ◽

2021 ◽

Vol 43 (4) ◽

Author(s):

Ali Eslahchi ◽

Mohammad Hasan Nobakhti ◽

Mohammad Behshad Shafii ◽

Mohammad Hosein Dibaei Bonab

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Convective Heat Transfer ◽

Experimental Evaluation ◽

Field Effect ◽

Magnetic Field Effect ◽

Variable Magnetic Field ◽

Taguchi Approach ◽

Forced Convective Heat Transfer ◽

Shaped Tube

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Effect of Magnetic Fields on the Resistance and Microstructure of Al-Cu Alloy during Solidification Processing

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2916 ◽

2011 ◽

Vol 287-290 ◽

pp. 2916-2920

Author(s):

Chun Yan Ban ◽

Peng Qian ◽

Xu Zhang ◽

Qi Xian Ba ◽

Jian Zhong Cui

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Turning Points ◽

Probe Method ◽

Solidification Processing ◽

Ac Magnetic Field ◽

Dc Magnetic Field ◽

Cu Alloy ◽

The Difference ◽

Good Agreement

The resistance of Al-21%Cu alloy under no magnetic field, DC magnetic field and AC magnetic field from liquid to solid was measured by a four-probe method. The difference of resistance versus temperature curves (R-T curves) was analyzed. It is found that the R-T curves of Al-21%Cu alloy are monotone decreasing and have two obvious turning points. Under DC magnetic field, the liquidus and solidus temperatures of the alloy both decrease, while under AC magnetic field, the liquidus and solidus temperatures both increase. There is a good agreement between the microstructure of quenching sample and R-T curves. The mechanism of the effect of magnetic fields was discussed.

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