Residual magnetic field variation induced by applied magnetic field and cyclic tensile stress

Huang, Haihong; Yao, Jieyan; Li, Zhenwen; Liu, Zhifeng

doi:10.1016/j.ndteint.2014.01.003

Cited by 28 publications

(12 citation statements)

References 22 publications

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“…The equivalent magnetic dipole is a physical model commonly used in the theoretical study of the mechanism of SMFL signal of the ferromagnet [ 22 , 27 , 36 ]. According to the equivalent magnetic charge theory, the exterior magnetic field including SMFL would be considered to originated from the magnetic charge: ρ = −∇ M .…”

Section: Experimental Details and Theoretical Backgroundmentioning

confidence: 99%

Experimental Study on Residual Bending Strength of Corroded Reinforced Concrete Beam Based on Micromagnetic Sensor

Zhou

Qiu

Zhou³

et al. 2018

Sensors

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This paper presents a nondestructive test method to evaluate the residual bending strength of corroded reinforced concrete beam by analyzing the self-magnetic flux leakage (SMFL) signals. The automatic scanning device was equipped with a micromagnetic sensor and sensor-based experimental details were introduced. Next, the theoretical formula of the normal component HS(z) of the SMFL signal that originated from the corroded region was derived based on the magnetic dipole model and the experimental results were discussed. The results indicate that the experimental data of HS(z) are consistent with the theoretical calculations, both location and extent of the steel bars corrosion can be qualitatively determined by using HS(z). The gradient K of HS(z) is approximately linearly related to the loss rate, S, of the bending strength, which can be used to evaluate the residual bending strength of the corroded reinforced concrete beam. This work lays the foundation for evaluating the residual bending strength of corroded reinforced concrete beams using the SMFL signal; the micromagnetic sensor is further applied to the civil engineering.

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Section: Experimental Details and Theoretical Backgroundmentioning

confidence: 99%

Experimental Study on Residual Bending Strength of Corroded Reinforced Concrete Beam Based on Micromagnetic Sensor

Zhou

Qiu

Zhou³

et al. 2018

Sensors

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“…Based on quantum mechanics, the exchange coupling of an electron spin magnetic moment produces magnetic domains in ferromagnetic materials [25]. When there is not magnetisation, a ferromagnetic component produces little external magnetic field.…”

Section: Rmf Detectionmentioning

confidence: 99%

Non-Destructive Detection of Wire Rope Discontinuities from Residual Magnetic Field Images Using the Hilbert-Huang Transform and Compressed Sensing

Zhang

Tan

Zheng

2017

Sensors

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Electromagnetic methods are commonly employed to detect wire rope discontinuities. However, determining the residual strength of wire rope based on the quantitative recognition of discontinuities remains problematic. We have designed a prototype device based on the residual magnetic field (RMF) of ferromagnetic materials, which overcomes the disadvantages associated with in-service inspections, such as large volume, inconvenient operation, low precision, and poor portability by providing a relatively small and lightweight device with improved detection precision. A novel filtering system consisting of the Hilbert-Huang transform and compressed sensing wavelet filtering is presented. Digital image processing was applied to achieve the localization and segmentation of defect RMF images. The statistical texture and invariant moment characteristics of the defect images were extracted as the input of a radial basis function neural network. Experimental results show that the RMF device can detect defects in various types of wire rope and prolong the service life of test equipment by reducing the friction between the detection device and the wire rope by accommodating a high lift-off distance.

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“…Therefore, it should not be surprising that exposure to electromagnetic fields could lead to physiological changes. Although there is a lack of consensus regarding the effects of ELF-MF on proteins [26][27][28], it seems that the ELF magnetic field affects proteins either by improving biological tasks or by causing dysfunction. This depends on whether the exchanged energy is appropriate for a particular task or not.…”

Section: Introductionmentioning

confidence: 99%

An extremely low-frequency magnetic field can affect CREB protein conformation which may have a role in neuronal activities including memory

Darwish

Darwish²,

Darwish

2020

J. Phys. Commun.

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The cAMP response element-binding protein (CREB) was exposed to an extremely low-frequency magnetic field (ELF-MF) of the range (−2.4-2.4) mT intensity and at a frequency of 50 Hz. The effects of exposure were investigated in the mid-infrared region using Fourier spectroscopic analysis. The purpose of this experiment is to simulate the exposure of neuronal proteins to a low magnetic field which may naturally occur in the brain due to electrical impulse signals. The experimental results showed inconsistent fluctuations in peak positions, band shape, and intensities for several bands in the amide II, amide IV and amide VI regions. This can be due to two factors. The first suggests that hydrogen bonds can alter the frequency of stretching vibrations depending on the increase or decrease of strain on the vibrations. The second is that all these bands are caused by bending vibrations in combinations with other vibrations, which makes these vibrations susceptible to magnetic field influence. Spectra analysis showed that once the CREB protein was exposed to a magnetic field, it induces a genuine reaction changing the secondary structure and producing changes that can have a lasting effect. The resulting conformational changes in brain proteins may have an effective role in signal transduction, learning and memory formation.

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Residual magnetic field variation induced by applied magnetic field and cyclic tensile stress

Cited by 28 publications

References 22 publications

Experimental Study on Residual Bending Strength of Corroded Reinforced Concrete Beam Based on Micromagnetic Sensor

Experimental Study on Residual Bending Strength of Corroded Reinforced Concrete Beam Based on Micromagnetic Sensor

Non-Destructive Detection of Wire Rope Discontinuities from Residual Magnetic Field Images Using the Hilbert-Huang Transform and Compressed Sensing

An extremely low-frequency magnetic field can affect CREB protein conformation which may have a role in neuronal activities including memory

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