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53
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Introduction
He received the B.E. degree in electronic science and technology and the Ph.D. degree in instrumentation science and technology from Chongqing University, Chongqing, China, in 2004, and 2009, respectively. He is currently a Professor with the School ofMechanical Engineering, Nanjing University of Science and Technology, Nanjing, China. His current research interests include magnetic sensors and instrumentation, and magnetic anomaly detection and systems.
Current institution
Publications
Publications (53)
A heterogeneous resonant magnetic field sensor is developed by using a FeGa plate, a quartz crystal double-ended tuning fork (DETF) resonator and a sapphire crystal plate. The double ends of the DETF are bonded to the ends of the magnetostrictive FeGa thin plate through two spacers, forming a resonant magnetic sensitive element. The C-cut sapphire...
High effective spin Hall efficiency and low magnetic damping constant are essential to achieve efficient spin-charge conversion for energy-efficient spintronic devices. We report the measurements of effective spin Hall efficiency and magnetic damping constant of Pt1-xTax/CoFeB structures using spin-torque ferromagnetic resonance (ST-FMR) techniques...
The existing detection device for unexploded ordnance (UXO) based on geomagnetic anomaly and electromagnetic induction suffers from issues such as functional separation, large size, and low efficiency due to the constraints of sensors. The centimeter-sized magnetostrictive/piezoelectric composite demonstrates static and dynamic wideband frequency r...
Under a high amplitude AC excitation field, the magnetostrictive/piezoelectric composite exhibits the nonlinear magnetoelectric (ME) effect. A weak DC/AC magnetic field can be measured by demodulating the odd harmonics generated by the composite structure due to the nonlinear ME effect. The AC excitation magnetic field created by an external signal...
We report the influence of ultrathin Ti insertion layer on the effective magnetic damping and effective spin Hall angle in Co/[Pt/Ti]n/Pt structures via spin-torque ferromagnetic resonance measurements. The effective magnetic damping shows a non-monotonic variation as a function of insertion layers number n, reaching a minimum at n = 5. Our analysi...
A type of differential resonant magnetic field sensor is developed by employing the composite elements of FeGa plates, piezoelectric quartz crystal double-ended tuning forks (DETFs) and bias permanent magnets. The model and analysis show that the differential design brings the benefits of doubled sensitivity, increased linearity and low temperature...
The film-based magnetic sensors possess prominent superiorities in miniaturization and integration. Because of the presence of shape demagnetization, the magnetic film effective permeability is dramatically degraded, restricting the performance improvement of planar magnetic sensors. This study reports an efficacious approach to compensate for the...
Cable current detection plays a vital role in power grids toward improving transmission efficiency, relieving power congestion, and ensuring grid reliability. However, the sensors in existing current detection systems either are wired with measurement instruments or are wireless yet require batteries, which is inconvenient for monitoring overhead p...
The layered ground under the excitation of a harmonic magnetic field will generate a secondary magnetic field. On the condition of low induction number, the apparent conductivity can be obtained by using the normalized secondary field measured by the instrument directly. By discretizing the integral of relative response function density, the expres...
Magnetic sensors based on nonlinear magnetoelectric (ME) effect can be used to measure weak dc and ac magnetic fields at room temperature. The focus of this paper is to present the nonlinear ME effect of parallel-placed dual FeNiMoSiB/PZT/FeNiMoSiB composites with small size which are operated in 180° anti-phase modulated mode and differential outp...
A differential resonant voltage sensor with frequency output was developed by bonding two quartz crystal double-ended tuning forks (DETFs) on both sides of a piezo bimorph. The applied voltage induced tensile and compression deformation in the upper and bottom layers of the piezo bimorph, which caused the resonant frequency of the dual DETFs to inc...
A novel magnetoelectric (ME) meta-composite device composed of a piezoelectric quartz crystal double-ended tuning fork (DETF), FeGa magnetostrictive plates, and quartz spacers is developed to realize low damping resonant ME effect. As the magnetostrictive force is transferred to the DETF through quartz spacers at the decoupling zones where the bend...
Filmed planar coils have obvious advantages for miniaturization, micro-fabrication, and circuit integration. Amorphous and nanocrystalline films exhibit extremely large permeabilities and are extensively used to film planar coils for inductance enhancement. In this paper, we analyze aspects in designing a soft magnetic film/planar coil multilayer s...
In this paper, a Fe–Ga alloy magnetostrictive beam is designed as an actuator to restrain the vibration of a supported mass. Dynamic modeling of the system based on the transfer matrix method of multibody system is first shown, and then a hybrid controller is developed to achieve vibration control. The proposed vibration controller combines a multi...
A resonant magnetic field sensor is developed by using a piezoelectric quartz crystal double-ended tuning fork (DETF), two FeGa thin plates, and four quartz spacers. The double ends of the DETF are bonded to the ends of the magnetostrictive thin plates through four spacers with adhesive, allowing the magnetostrictive force to be converted into the...
A packaged angle sensor consisting of four PZT/FeGa/PZT magnetoelectric (ME) laminate composites, four magnetic accumulation arcs, a magnetic accumulation (MA) ring, a multi-polar magnetic ring (MPMR), a shaft, and necessary shells is fabricated and characterized. The ME laminate composite with a slim shape is placed between the MA arc and the MA r...
Due to the properties of controllable stiffness and damping, a novel isolator based on magnetorheological elastomers is introduced in this article. According to the experimental results, the initial vertical stiffness and damping coefficient of the magnetorheological elastomer isolator are 1.14 × 10⁶ N/m and 495.8 N s/m, respectively. The relative...
Based on magnetoelectric effect, an angle sensor consisting of a magnetostrictive/piezoelectric laminate composite (MPLC), a multi-polar magnetic ring (MPMR), a modulation coil, and a shaft is presented. The MPLC and the modulation coil winded around it are the immobile parts of the angle sensor. The shaft and the MPMR fixed on it are the moving pa...
Magnetostrictive actuators invariably exhibit bias-rate-dependent hysteresis, which could cause vibration and error in the micro-positioning control. We present a methodology for linearization control for the hysteresis of a magnetostrictive actuator with a wide range of input rates and biases. The hysteresis compensation is attained through applic...
In order to accurately describe the asymmetric rate-bias-dependent hysteresis of a Fe–Ga alloy magnetostrictive actuator, a comprehensive model, which is composed of a phenomenon model, describing hysteresis by the modified Bouc–Wen hysteresis operator, and a theoretical model, representing the dynamics characteristics, is put forward. The experime...
The small-signal vibration model of TbxDy1-xFey plate was developed by mechanical-electrical analogy method. Based on the model, we demonstrated the reasonableness of measuring the small-signal magnetomechanical behaviors by a laser Doppler vibrometer. The strain coefficient of the TbxDy1-xFey plates was measured as a function of frequency and bias...
Frequency of most ambient vibrations is not single, but varies within a broad frequency range. For supplying sufficient energy to the self-powered wireless sensors by harvesting ambient vibration energy, it is need that vibration energy harvesters have broadband acquisition performances. Currently nonlinear vibration methodes have been widely studi...
The magnetoelectric (ME) effect has been successfully demonstrated in the potential device applications of energy harvesters, magnetic sensors, current sensors, microwave and millimeter-wave multiferroic devices, miniature antennas, and even medical applications. To further investigate the role of ME effect in rotational parameters detection, this...
A static/quasi-static magnetic field sensor is developed by using a double ended trip-beam tuning fork (TBTF), a TbxDy1-xFe2-y plate and several piezoelectric Pb(Zr1−xTix)O3 (PZT) plates. The TBTF is boned horizontally across two ceramic supports which are fixed on the ends of the TbxDy1-xFe2-y plate. The magnetostrictive stress induces an axial fo...
Introduction
Impedance curves, equivalent circuit parameters in Tb1−xDyxFe2−y/Pb(Tix,Zr1−x)O3 laminate vibrator have been characterized as a function of external DC magnetic field. Clearly, the equivalent circuit parameters are function of external DC magnetic field due to the field-dependent properties of magnetostrictive material.
Conclusion
Bas...
This paper outlines an optical beam steering system built using a two-axis fast steering mirror (FSM) with piezoelectric stack actuators to maintain precise pointing control. A novel mathematical model of the FSM is put forward by using a transfer matrix method of a multibody system to describe the dynamics characteristics and a hysteresis model to...
In order to achieve a large displacement output from a piezoelectric actuator, we realized the piezoelectric stack actuator (PSA) by mechanically layering/stacking multi-chip piezoelectric wafers in a series and electrically connecting the electrodes in parallel. In this paper, in order to accurately model the hysteresis and the dynamic characteris...
The magnetoelastic damping in magnetostrictive material is investigated. It is noted that the quality factor (the inverse measure of damping) of giant magnetostrictive material Terfenol-D is strongly dependent on bias direct current (DC) magnetic field. Taking advantage of the DC field dependence of magnetoelastic damping in magnetostrictive materi...
A high-quality factor magnetoelectric (ME) laminated composite employing a type of ferromagnetic constant-elasticity alloy (FCEA) and piezoelectric Pb(Zr,Ti)O<sub>3</sub> material is developed. The laminate is designed to operate as a half-wavelength (lambda/2), longitudinal resonator. The FCEA features high effective quality factor and low magneto...
The magneto-mechanical damping (MMD) in Terfenol-D is investigated by measuring the resonance vibration spectra of Terfenol-D bar. It is observed that MMD in Terfenol-D strongly depends on DC magnetic field (Hdc), and the ratio of the maximum variation of MMD over Hdc to the MMD at zero bias field achieves ~255%. Taking advantage of this MMD depend...
The field directional dependence of magnetoelectric (ME) behaviors in rectangular-shaped Terfenol-D and Pb(Zr,Ti)O<sub>3</sub> laminated composites are investigated. In experiments, the DC bias field is applied along either the length or width direction of the composites respectively superimposed with a parallel or vertical AC magnetic filed. It de...
The dynamic magneto-mechanical behaviors in a type of iron-nickel-based ferromagnetic alloy with constant elasticity were investigated as a function of both the DC bias magnetic field () and the frequency. The rectangular plate-like samples were excited to vibrate at a half-wavelength, longitudinal resonance by an AC magnetic field superimposed wit...
The magneto-mechanical coupling factor, electromechanical coupling factor, and magnetoelectric (ME) coupling factor of magnetostrictive/piezoelectric laminated composite, which are related to the geometric dimensions and the performance parameter of the magnetostrictive and piezoelectric materials, are analysed and derived. It is also demonstrated...
To achieve strong power coupling, a resonance-type magnetoelectric (ME) transducer with high quality factor is developed to achieve strong ME coupling. The ME transducer employs a type of iron–nickel-based ferromagnetic alloy with constant elasticity and piezoelectric Pb(Zr,Ti)O3 (PZT8) material. The dynamic magnetomechanical behavior of the ferrom...
The megnetoelectric (ME) effect of magnetostrictive Terfenol-D (Tb<sub>1</sub> <sub>-</sub> <sub>x</sub>Dy<sub>x</sub>Fe<sub>2</sub> <sub>-</sub> <sub>y</sub>) and piezoelectric Pb(Zr,Ti)O<sub>3</sub> plates bonded on a beryllium bronze substrate is reported. The substrate severs as a frequency determining element and dominates the quality factor (...
A magnetostrictive/elastic substrate/piezoelectric composite has been developed where the elastic substrate takes the form of trapezium to amplify the strain. By using the equivalent circuit, the magnetoelectric response of the composite in the longitudinal vibration has been analyzed. The magnetoelectric response of a Terfenol-D/trapezoidal Be-bro...
Magnetostrictive properties in a type of iron-nickel-based ferromagnetic alloy with constant elasticity (FeNi-FACE) are investigated. The results indicate that the strain coefficient at resonance achieves 865.70 nm/A due to the high effective mechanical quality factor (~3000) of the alloy. A magnetoelectric (ME) transducer with high effective mecha...
This paper presents a new high-efficiency ME composite transducer consisting of magnetostrictive Terfenol-D arrays, piezoelectric PZT arrays and a substrate. Magnetostrictive resonant unidirectional transducer (MRUDT) array groups and a piezoelectric unidirectional transducer (PUDT) array group are created inside the transducer while propagating th...
The dynamic Young's modulus of elasticity and the dynamic piezomagnetic coefficient of magnetostrictive material are derived based on the nonlinear constitutive model of magnetostrictive material. Based on the equivalent circuit method, the relation between magnetoelectric effect of the laminated composite and the dynamic Young's modulus of elastic...
This paper presents a new magnetoelectric (ME) composite transducer consisting of a magnetostrictive Terfenol-D plate, multiple piezoelectric PZT plates and an ultrasonic horn. The energy of the vibrating wave induced from the magnetostrictive Terfenol-D plate can be converged by using an ultrasonic horn and the more vibrating energy can convert in...
Strain in a laminated structure is transferred by the interlayer adhesive layer. However, the analysis of the adhesive layer behaviors was rarely carried out. The Hamilton's principle is used to derive the governing motion equation of the GMM/elastic plate/PZT three-layered structure. The effects of the adhesive layer resulting from the shear and l...
The magnetostrictive/piezoelectric (MP) laminate composite has dramatically enhanced magnetoelectric (ME) effect when operating around resonance. The theoretical analysis of the resonant ME effect is investigated using the equivalent circuit method, in which the eddy current loss, the mechanical loss and the electric loss are all taken into account...
The magnetoelectric (ME) effect of magnetostrictive Terfenol-D (Tb<sub>1-x</sub>Dy<sub>x</sub>Fe<sub>2-y</sub>) and piezoelectric Pb(Zr<sub>1-x</sub>Ti<sub>x</sub>)O<sub>3</sub> plates bonded on a beryllium bronze substrate is reported. The substrate severs as frequency determining element and dominates the Q-factor of the oscillator. The device ca...
Magnetoelectric effect has gained considerable attention over the past few years. A much higher magnetoelectric voltage coefficient is desirable. This paper presents a new magnetoelectric transducer with synthesizing the advantages of giant magnetostrictive material, piezoelectric material and ultrasonic horn. The unique energy concentration and st...
The theoretical analysis of resonance magnetoelectric (ME) performances in longitude-transverse type magnetostrictive/piezoelectric laminated composite is presented in this paper based on the equivalent circuit method, and the formula of ME voltage coefficient is obtained, which is useful to the composite design and optimization. To evaluate the ME...
A magnetoelectric (ME) composite consisting of a copper ultrasonic horn, a magnetostrictive Terfenol-D (TbxDy1−xFe2) plate, and multiple piezoelectric PZT [Pb(Zr1−xTix)O3] plates has been developed. The ultrasonic horn converges and amplifies the vibrating magnitude and drives PZT plates at wide bandwidth. The composite with multiple PZT plates ele...
