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学者姓名：刘秀成
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摘要 ：
Since the permeability of ferromagnetic materials is sensitive to the stress changes, it is feasible to acquire the stress level through detecting the change in permeability. In this study, to explore the distribution of stress or residual stress along the depth direction, a multi-layer model was established and a new inversion algorithm was proposed; and the hypothesis of uniformity of the material's physical properties for each layer was introduced. Under laboratory conditions, the four-point bending experiment was then implemented with a sample of 45# steel. Global Fourier series fitting based on the least-squares method was used for signal process. The amplitude ratio of the induced voltage to the excitation current was extracted. The effective permeability and the associated hysteresis angle at the 0.25 mm deflection were calculated and presented good regular variations. Finally, under the 0.25 mm deflection, the effective permeability change along the depth was obtained, and the inversely fitted curve was consistent with the theoretical curve. It is verified that the sensor has good robustness by adding deviation of the detection depth. Thereby, it is feasible to test stress or residual stress as a function of depth by multi-frequency eddy current (EC) method.
关键词 ：
multi-layer material model multi-layer material model Effective permeability Effective permeability multi-frequency eddy current (EC) method multi-frequency eddy current (EC) method stress profiles in depth stress profiles in depth
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| GB/T 7714 | Di, Jingyu , He, Cunfu , Lee, Yung-Chun et al. Application of a New Inversion Algorithm Based on Multi-Layer Model Hypothesis for Testing Stress-Depth Profiles by Multi-Frequency EC Method [J]. | IEEE TRANSACTIONS ON MAGNETICS , 2021 , 57 (5) . |
| MLA | Di, Jingyu et al. "Application of a New Inversion Algorithm Based on Multi-Layer Model Hypothesis for Testing Stress-Depth Profiles by Multi-Frequency EC Method" . | IEEE TRANSACTIONS ON MAGNETICS 57 . 5 (2021) . |
| APA | Di, Jingyu , He, Cunfu , Lee, Yung-Chun , Liu, Xiucheng , Shang, Wanli . Application of a New Inversion Algorithm Based on Multi-Layer Model Hypothesis for Testing Stress-Depth Profiles by Multi-Frequency EC Method . | IEEE TRANSACTIONS ON MAGNETICS , 2021 , 57 (5) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Since magnetic Barkhausen noise is very sensitive to the change of the stress or residual stress level in components, it is feasible to detect the stress or residual stress profile along the depth direction by the magnetic Barkhausen noise method. An engineering approach was used to validate a theoretical model describing the relationship between magnetic Barkhausen noise and stress magnitude. To generate stress gradients in the specimen of Q235 steel under different deflections, the four-point bending device was used. Then the detected signals obtained in the experiment were divided into different sub-bands to evaluate the stress at different depths. The testing depth was set to be around 100 mu m due to the rapid exponential attenuation of the noise signals. In the experiments, the sub-band energy density showed sensitive as the loading displacement increasing. The experimental results showed that the signal energy was also sensitive to the plastic deformation of the material. Within the depth of 100 mu m, the stress change was very small. The final experimental results showed that even under such small stress variations, it is sensitive and feasible to use the magnetic Barkhausen noise energy to characterise the change of stress gradients.
关键词 ：
energy density energy density Magnetic Barkhausen noise Magnetic Barkhausen noise plastic deformation plastic deformation stress gradient stress gradient sub-band sub-band
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| GB/T 7714 | Di, Jingyu , He, Cunfu , Lee, Yung-Chun et al. Evaluation of the stress gradient of the superficial layer in ferromagnetic components based on sub-band energy of magnetic Barkhausen noise [J]. | NONDESTRUCTIVE TESTING AND EVALUATION , 2021 . |
| MLA | Di, Jingyu et al. "Evaluation of the stress gradient of the superficial layer in ferromagnetic components based on sub-band energy of magnetic Barkhausen noise" . | NONDESTRUCTIVE TESTING AND EVALUATION (2021) . |
| APA | Di, Jingyu , He, Cunfu , Lee, Yung-Chun , Liu, Xiucheng . Evaluation of the stress gradient of the superficial layer in ferromagnetic components based on sub-band energy of magnetic Barkhausen noise . | NONDESTRUCTIVE TESTING AND EVALUATION , 2021 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The two-step strategy for 3D reconstruction of complex defects was updated by combining the magnetic field disturbance (MFD) with magnetic flux leakage (MFL) measurement methods. Firstly, the plane-scanned MFD imaging was employed to achieve high-accuracy reconstruction of the opening outlines of complex defects. Secondly, the finite element simulation model of the defect with the recognized opening outline was established as the forward model for depth profile inversion with the particle swarm optimization algorithm. The performances of the conventional MFL-based and updated strategies were carefully compared through finite element simulation. The results proved that the updated method combining MFD signals with MFL signals had the better performance in accurate 3D reconstruction of complex defects than the conventional MFL-based inversion strategy, displaying smaller errors in opening outline, peak depth and the profile. Experimental results confirmed that the updated strategy could accurately reconstruct the 3D shape of 8-shaped defect and rectangular defect with rounded corners.
关键词 ：
3D reconstruction 3D reconstruction complex defect complex defect magnetic fl magnetic fl magnetic field disturbance magnetic field disturbance particle swarm optimization particle swarm optimization ux leakage ux leakage
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| GB/T 7714 | Li, Hengtao , Liu, Xiucheng , Wu, Bin et al. Accurate 3D reconstruction of complex defects based on combined method of MFL and MFDs [J]. | MEASUREMENT SCIENCE AND TECHNOLOGY , 2021 , 32 (7) . |
| MLA | Li, Hengtao et al. "Accurate 3D reconstruction of complex defects based on combined method of MFL and MFDs" . | MEASUREMENT SCIENCE AND TECHNOLOGY 32 . 7 (2021) . |
| APA | Li, Hengtao , Liu, Xiucheng , Wu, Bin , He, Cunfu . Accurate 3D reconstruction of complex defects based on combined method of MFL and MFDs . | MEASUREMENT SCIENCE AND TECHNOLOGY , 2021 , 32 (7) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In this study, the method of magnetic Barkhausenn noise (MBN) and tangential magnetic field (TMF) was employed for achieving simultaneous, quantitative prediction of residual stress and surface hardness in box-shape deep drawn parts of SPCC steel. Bi-directional MBN and TMF signals, profiles of surface hardness and residual stress were experimentally measured. Pearson correlation analysis results show that the averaged amplitude of MBN in one magnetization cycle and Root mean square of MBN signal demonstrates approximate linear dependency on residual stress (or surface hardness) in both the measured directions. Three-layer BP models are established after input nodes screening and optimization of neurons' number in the middle hidden layer. BP models are marked corresponding to scanning or magnetization directions. For each direction, two independent models are established and they are combined to use for realizing high accuracy and simultaneous evaluation of the residual stress and surface hardness.
关键词 ：
Deep drawn part Deep drawn part Magnetic Barkhausen noise Magnetic Barkhausen noise Quantitative prediction Quantitative prediction Residual stress Residual stress Surface hardness Surface hardness
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| GB/T 7714 | Dong, Haijiang , Liu, Xiucheng , Song, Yahu et al. Quantitative evaluation of residual stress and surface hardness in deep drawn parts based on magnetic Barkhausen noise technology [J]. | MEASUREMENT , 2021 , 168 . |
| MLA | Dong, Haijiang et al. "Quantitative evaluation of residual stress and surface hardness in deep drawn parts based on magnetic Barkhausen noise technology" . | MEASUREMENT 168 (2021) . |
| APA | Dong, Haijiang , Liu, Xiucheng , Song, Yahu , Wang, Bo , Chen, Shenglai , He, Cunfu . Quantitative evaluation of residual stress and surface hardness in deep drawn parts based on magnetic Barkhausen noise technology . | MEASUREMENT , 2021 , 168 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In this study, a novel piezoelectric energy harvester (PEH) based on the array composite spherical particle chain was constructed and explored in detail through simulation and experimental verification. The power test of the PEH based on array composite particle chains in the self-powered system was realized. Firstly, the model of PEH based on the composite spherical particle chain was constructed to theoretically realize the collection, transformation, and storage of impact energy, and the advantages of a composite particle chain in the field of piezoelectric energy harvesting were verified. Secondly, an experimental system was established to test the performance of the PEH, including the stability of the system under a continuous impact load, the power adjustment under different resistances, and the influence of the number of particle chains on the energy harvesting efficiency. Finally, a self-powered supply system was established with the PEH composed of three composite particle chains to realize the power supply of the microelectronic components. This paper presents a method of collecting impact energy based on particle chain structure, and lays an experimental foundation for the application of a composite particle chain in the field of piezoelectric energy harvesting. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
关键词 ：
Composite materials Composite materials Composite structures Composite structures Energy harvesting Energy harvesting Energy storage Energy storage Microelectronics Microelectronics Piezoelectricity Piezoelectricity Spheres Spheres System stability System stability
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| GB/T 7714 | Yang, Shuo , Wu, Bin , Liu, Xiucheng et al. Piezoelectric impact energy harvester based on the composite spherical particle chain for self-powered sensors [J]. | Sensors , 2021 , 21 (9) . |
| MLA | Yang, Shuo et al. "Piezoelectric impact energy harvester based on the composite spherical particle chain for self-powered sensors" . | Sensors 21 . 9 (2021) . |
| APA | Yang, Shuo , Wu, Bin , Liu, Xiucheng , Li, Mingzhi , Wang, Heying , He, Cunfu . Piezoelectric impact energy harvester based on the composite spherical particle chain for self-powered sensors . | Sensors , 2021 , 21 (9) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Magnetic Barkhausen noise (MBN) signals in the stage from saturation to remanence of the hysteresis loop are closely correlated with magnetocrystalline anisotropy energy. MBN events in this stage are related to the nucleation and growth of reverse domains, and mainly affected by the crystallographic textures of materials. This paper aims to explore the angle-dependent magnetocrystalline anisotropy energy. Based on the consideration of macroscopic magnetic anisotropy, with the concept of coordinate transformation, a model was firstly established to simulate the magnetocrystalline anisotropy energy (MCE) of a given material. Secondly, the MBN signals in different directions were tested with a constructed experimental system and the characteristic parameters extracted from the corresponding stage were used to evaluate the magnetic anisotropy of the material. Finally, the microstructures of 4 materials were observed with a metallographic microscope. The microtextures of local areas were measured with the electron backscatter diffraction (EBSD) technique. The MBN experimental results obtained under different detection parameters showed significant differences. The optimal MBN detection parameters suitable for magnetic anisotropy research were determined and the experimental results were consistent with the results of MCE model. The study indicated that MBN technology was applicable to evaluate the MCE of pipeline steel and oriented silicon steel, especially pipeline steel. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
关键词 ：
Crystallography Crystallography Impulse noise Impulse noise Magnetic anisotropy Magnetic anisotropy Magnetic materials Magnetic materials Magnetocaloric effects Magnetocaloric effects Magnetocrystalline anisotropy Magnetocrystalline anisotropy Pipelines Pipelines Silicon steel Silicon steel Steel pipe Steel pipe Textures Textures
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| GB/T 7714 | Wang, Liting , He, Cunfu , Liu, Xiucheng . Evaluation of the magnetocrystalline anisotropy of typical materials using mbn technology [J]. | Sensors , 2021 , 21 (10) . |
| MLA | Wang, Liting et al. "Evaluation of the magnetocrystalline anisotropy of typical materials using mbn technology" . | Sensors 21 . 10 (2021) . |
| APA | Wang, Liting , He, Cunfu , Liu, Xiucheng . Evaluation of the magnetocrystalline anisotropy of typical materials using mbn technology . | Sensors , 2021 , 21 (10) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Residual plastic deformation induced in low-carbon steels usually demonstrates anisotropy. Eddy current method is applicable for the residual plastic deformation evaluation. However, it is difficult to efficiently evaluate both the principal strain direction and magnitude of residual plastic deformation with the conventional eddy current method. To solve these limitations, a novel method of oscillatory rotating eddy current (OREC) was developed and successfully applied in characterizing the anisotropy of residual plastic deformation in low-carbon steels. The parameters of eddy current response obtained under different frequencies were extracted to characterize the plastic deformation and then the characterization performances of extracted parameters were compared. The compound voltage signal and real part of the impedance could better characterize the residual plastic deformation than the imaginary part of the impedance. It was found that the angle of the major axis of the selected 8-shaped patterns measured with OREC was a good indicator of the principal strain direction. As the residual plastic deformation was increased, the length of the major axis of the 8-shaped patterns monotonously increased despite its sensitivity to the plastic deformation was frequency-dependent.
关键词 ：
Anisotropy evaluation Anisotropy evaluation Low-carbon steel Low-carbon steel Oscillatory rotating eddy current Oscillatory rotating eddy current Residual plastic deformation Residual plastic deformation
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| GB/T 7714 | Wang, Nan , Liu, Xiucheng , Yang, Jieming et al. Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method [J]. | JOURNAL OF NONDESTRUCTIVE EVALUATION , 2021 , 40 (3) . |
| MLA | Wang, Nan et al. "Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method" . | JOURNAL OF NONDESTRUCTIVE EVALUATION 40 . 3 (2021) . |
| APA | Wang, Nan , Liu, Xiucheng , Yang, Jieming , He, Cunfu . Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method . | JOURNAL OF NONDESTRUCTIVE EVALUATION , 2021 , 40 (3) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Previous studies on Lamb wave touchscreen (LWT) were carried out based on the assump-tion that the unknown touch had the consistent parameters with acoustic fingerprints in the reference database. The adaptability of LWT to the variations in touch force and touch area was investigated in this study for the first time. The automatic collection of the databases of acoustic fingerprints was realized with an experimental prototype of LWT employing three pairs of transmitter–receivers. The self-adaptive updated weight coefficient of the used transmitter–receiver pairs was employed to successfully improve the accuracy of the localization model established based on a learning method. The performance of the improved method in locating single-and two-touch actions with the reference database of different parameters was carefully evaluated. The robustness of the LWT to the variation of the touch force varied with the touch area. Moreover, it was feasible to locate touch actions of large area with reference databases of small touch areas as long as the unknown touch and the reference databases met the condition of equivalent averaged stress. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
关键词 ：
Database systems Database systems Learning systems Learning systems Surface waves Surface waves Transmitters Transmitters Ultrasonic waves Ultrasonic waves
引用：
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| GB/T 7714 | Yang, Zengchong , Liu, Xiucheng , Wu, Bin et al. Adaptability of ultrasonic lamb wave touchscreen to the variations in touch force and touch area [J]. | Sensors , 2021 , 21 (5) : 1-14 . |
| MLA | Yang, Zengchong et al. "Adaptability of ultrasonic lamb wave touchscreen to the variations in touch force and touch area" . | Sensors 21 . 5 (2021) : 1-14 . |
| APA | Yang, Zengchong , Liu, Xiucheng , Wu, Bin , Liu, Ren . Adaptability of ultrasonic lamb wave touchscreen to the variations in touch force and touch area . | Sensors , 2021 , 21 (5) , 1-14 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In this paper, a non-destructive testing (NDT) method based on highly non-linear solitary waves (HNSWs) was employed to detect defects in the metal plate of an adhesive composite metal structure. Firstly, HNSWs were generated by applying impulses to a one-dimensional granular chain of steel spheres. Proof-of-concept finite element (FE) simulations were then performed using Abaqus software to investigate the reflection behaviour of HNSWs at the interface of the chain and the two-layer material with defects. The time-of-flight ( TOF) of primary reflected solitary waves (PSWs) was confirmed as a good indicator for defect localisation and sizing. A HNSW generator and detector device was used in the experiment and HNSW B-scan and C-scan inspections of adhesive composite steel specimens were achieved. The TOF imaging results accurately indicated the locations of cylindrical defects in the bottom steel block. The linear correlation between the peak value of the pulsed TOF profile and the defect diameter was determined. The contours of TOF with different values were introduced to reconstruct the shape of the circular defective region. Through selecting the correct threshold of TOF, the relative error of the area surrounded by the contour compared to the actual area of the five investigated defects could be less than 6.5%.
关键词 ：
adhesive composite metal structure adhesive composite metal structure C-scan imaging C-scan imaging defect detection defect detection highly non-linear solitary waves highly non-linear solitary waves non-destructive testing non-destructive testing
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| GB/T 7714 | Li, Mingzhi , Wu, Bin , Liu, Xiucheng et al. Highly non-linear solitary wave imaging method for detecting cylindrical defects in the metal plate of an adhesive composite metal structure [J]. | INSIGHT , 2020 , 62 (6) : 331-337 . |
| MLA | Li, Mingzhi et al. "Highly non-linear solitary wave imaging method for detecting cylindrical defects in the metal plate of an adhesive composite metal structure" . | INSIGHT 62 . 6 (2020) : 331-337 . |
| APA | Li, Mingzhi , Wu, Bin , Liu, Xiucheng , He, Cunfu . Highly non-linear solitary wave imaging method for detecting cylindrical defects in the metal plate of an adhesive composite metal structure . | INSIGHT , 2020 , 62 (6) , 331-337 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Finite element simulation and experiment methods are employed to analyze the detection ability of flexible eddy current sensor for detecting the orientation angle and depth of a simulated crack defect when the circular coil is in different bending angles. The obtained results show that the bending of the circular coil leads the isotropic eddy current field to change to unidirectional eddy current field. No matter the flexible eddy current sensor works under self- induction mode or mutual- induction mode, the sensitivity of the flexible eddy current sensor to the crack faults with different orientation angles decreases. For instance, when the bending angle of the coil is 30°, the sensitivity of the flexible eddy current sensor to the crack with an orientation angle of 90° in self- and mutual induction modes reduces by 7% and 45%, respectively. In addition, the coil bending causes that the recognition ability of the flexible eddy current sensor to the crack orientation angle and depth monotonously decreases as the bending angle of the coil increases. Under mutual-induction mode the flexible eddy current sensor achieves better recognition ability to crack orientation angle and depth compared with the case under the self-induction mode. The influence of the coil bending occurred in the shape matching between the coil and curved surface on the performance of the sensor can not be ignored. A reasonable coil bending angle range should be selected when designing the flexible eddy current sensor. © 2020, Science Press. All right reserved.
关键词 ：
Cracks Cracks Eddy current testing Eddy current testing
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| GB/T 7714 | Wu, Bin , Yang, Ting , Liu, Xiucheng et al. Influence of coil bending angle on the defect detection ability of flexible eddy current sensor [J]. | Chinese Journal of Scientific Instrument , 2020 , 41 (4) : 41-48 . |
| MLA | Wu, Bin et al. "Influence of coil bending angle on the defect detection ability of flexible eddy current sensor" . | Chinese Journal of Scientific Instrument 41 . 4 (2020) : 41-48 . |
| APA | Wu, Bin , Yang, Ting , Liu, Xiucheng , He, Cunfu . Influence of coil bending angle on the defect detection ability of flexible eddy current sensor . | Chinese Journal of Scientific Instrument , 2020 , 41 (4) , 41-48 . |
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