With respect to the problem that it is difficult to pick out eggs with small cracks, a novel vibrating type of eggshell cracks detection system using a magnetostrictive transducer was developed firstly. Then the acoustic signals was recorded while the transducer vibrating with the swept frequency from 1 to 14000 Hz. Thirdly, the wavelet and Burg power spectrum were used for data pretreatment an...

The magnetostrictive guided wave sensor with a single induced winding cannot distinguish axially symmetric from non-axially symmetric features in a pipe, because it is impossible for the sensor to detect the non-axially symmetric mode waves. When we study the effect of the change of the magnetic field in the air zone for receiving the longitudinal guided wave mode, we find that the change of th...

When the photovoltaic (PV) system suffers shading problems caused by different degrees and areas, shaded PV cells will consume electricity generate heat, corresponding bypass diode operating at a certain current conduct, special magnetic field be generated in space. In this study, magnetostrictive-based detection method device for are developed from theoretical, simulation, physical experimenta...

In this paper, we propose a model for dynamic magnetostrictive hysteresis in a thin rod actuator. We derive two equations that represent magnetic and mechanical dynamic equilibrium. Our model results from an application of the energy balance principle. It is a dynamic model as it accounts for inertial effects and mechanical dissipation as the actuator deforms, and also eddycurrent losses in the...

Multiferroic composite materials, consisting of coupled ferromagnetic and piezoelectric phases, are of great importance in the drive towards creating faster, smaller and more energy efficient devices for information and communications technologies. Such devices require thin ferromagnetic films with large magnetostriction and narrow microwave resonance linewidths. Both properties are often degra...