Quantitative study of magnetic memory signal characteristic affected by external magnetic field

Liu, Bin; He, Limin; Zhang, Hai; Сфарра, Стефано; Fernandes, Henrique; Perilli, Stefano; Ren, Jinchang

doi:10.1016/j.measurement.2018.09.025

Cited by 21 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liu et al established a magneto-mechanical coupling model including the excitation magnetic field term to calculate the relationship between magnetization intensity and uniaxial tensile stress under weak magnetic excitation [32]. Furthermore, Liu obtained the conclusion that exciting the magnetic field can improve the problem that the linearity of magnetic signals decreases with increasing stress [33]. Huang et al used the magnet to perform local magnetization on the steel plate and found that the antiinterference ability of the magnetic signal and the sensitivity to corresponding stress were both improved [34].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on strengthening the magneto-mechanical coupling effect of X80 steel by weak magnetic excitation

He,

Liao,

Liao

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

Current magnetic stress detection techniques are significantly impacted by external noise signals. The magnetic stress detection technology under excitation magnetic fields is proposed to weaken the external noise signals on the detection results. In this study, the uniaxial tensile magnetic signal testing system with the excitation magnetic field was built. The enhancement of the weak magnetic excitation on magnetic signals has been quantitatively analyzed and the concept of optimal weak excitation magnetic field has been proposed. The response law between triaxial magnetic induction intensity and stress under the excitation magnetic field is determined. The results indicate that the weak excitation magnetic field significantly enhances the magnetic induction signal intensity, more importantly, the linearity of the magnetic signal and stress response is also enhanced. Furthermore, the optimal excitation magnetic field under uniaxial stress states is 600 A/m, and the corresponding stress-magnetic change rate is 0.002 Oe/MPa. This study provides a theoretical basis for the long-distance detection of pipelines under weak magnetic excitation. The long-distance magnetic stress detection results of pipelines will become more accurate with the weak magnetic excitation which has a good engineering significance.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental study on strengthening the magneto-mechanical coupling effect of X80 steel by weak magnetic excitation

He,

Liao,

Liao

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Moreover, the residual magnetic field can be measured using the MMM method, which is stimulated by mechanical stress in conjunction with the geomagnetic field without requiring artificial magnetisation and has demonstrated its utility in monitoring early damage development [11]. However, the magnetic sensor signal is weak and susceptible to noise, interference, and undesirable magnetic signals from the environment [12]. Signal processing in the time-frequency domain analysis is now frequently used to extract indistinguishable hidden signal information from the original signal.…”

Section: Introductionmentioning

confidence: 99%

Detection of Uniaxial Fatigue Stress under Magnetic Flux Leakage Signals using Morlet Wavelet

Firdaus

Arifin

Abdullah

et al. 2022

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

This paper demonstrates the application of continuous wavelet transform technique for magnetic flux leakage signal generated during a uniaxial fatigue test. This is a consideration as the magnetic signal is weak and susceptible to being influenced by an external magnetic field. The magnetic flux leakage signal response of API steel grade X65 is determined using Metal Magnetic Memory under cyclic load conditions ranging from 50% to 85% of the UTS. To facilitate further signal analysis, the magnetic flux gradient, the dH(y)/dx signal were converted from a length base into time series in this study. Magnetic flux leakage readings indicated a maximum UTS load of 56.5 (A/m)/mm at 85%, where a higher load resulted in a higher reading and the signal contained Morlet wavelet coefficient energy of 1.02×106 µe2/Hz. As increasing percentages of UTS loads were applied, the signal analysis revealed an increasing linear trend in the dH(y)/dx and wavelet coefficient energy. The analysis revealed a strong correlation between the wavelet coefficient energy and the dH(y)/dx amplitude, as indicated by the coefficient of determination (R2) value of 0.8572. Hence, this technique can provide critical information about magnetic flux leakage signals that can be used to detect high stress concentration zones.

show abstract

“…erefore, after the pouring is completed, the casting quality of SSIT must be tested, the void defect area should be found in time, and grouting should be carried out to reinforce it before sinking. However, owing to the presence of the steel shell, various electromagnetic wave-based detection methods cannot be applied [12][13][14], such as the magnetic method, which has wide application in long-distance pipeline inspection [15][16][17]. At present, the detections in SSIT structure only rely on the elastic wave and radiation detection methods such as the ultrasonic method, impact acoustic method, the infrared method [18,19], and the neutron method.…”

Section: Introductionmentioning

confidence: 99%

Application of Impact Imaging Method on Nondestructive Detection of Void Defects in Sandwich-Structured Immersed Tunnel

Liu

Zhang

et al. 2022

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Sandwich-structured immersed tunnel is an essential component in the field of cross-sea tunnel structural engineering which has a complicated internal structure. The void defects between the contacting surface of the steel and concrete reduce the carrying capacity of the structure. There are presently no effective, rapid, and accurate methods for detecting the casting quality of steel-shell concrete. Based on the propagation law of elastic stress waves in different media and the theory of a near-source wavefield, a prototype experiment on the nondestructive detection of void defects in sandwich-structured immersed tunnel was conducted. The experiment firstly determined the detection criterion for the impact imaging method through the features of the waveform data collected from 2 compartments (12 opening positions) of the full-scale model and then used the detection criterion to perform blind tests on the other 12 compartments of the full-scale model. The blind tests’ results of 72 opening positions showed that the prediction precision is 87.5% and thereby verify the applicability and accuracy of the detection criterion of the impact imaging method.

show abstract

Quantitative study of magnetic memory signal characteristic affected by external magnetic field

Cited by 21 publications

References 19 publications

Experimental study on strengthening the magneto-mechanical coupling effect of X80 steel by weak magnetic excitation

Experimental study on strengthening the magneto-mechanical coupling effect of X80 steel by weak magnetic excitation

Detection of Uniaxial Fatigue Stress under Magnetic Flux Leakage Signals using Morlet Wavelet

Application of Impact Imaging Method on Nondestructive Detection of Void Defects in Sandwich-Structured Immersed Tunnel

Contact Info

Product

Resources

About