A magnetostrictive FeNi-coated surface acoustic wave (SAW)-based current sensor was proposed in this work. The weak remanence and hysteresis effect of the FeNi itself contributes to suppress the asymmetry in sensor response at increasing and decreasing current. The sensor response was simulated by solving the coupled electromechanical field equation in layered structure considering the magnetos...

PURPOSE To compare patients' perception of discomfort, vibration and noise levels between piezoelectric and the magnetostrictive ultrasonic units during periodontal debridement. METHODS Periodontal debridement was performed on 75 subjects using a split-mouth design. Two quadrants on the same side were instrumented with a piezoelectric ultrasonic device (EMS Swiss Mini Master® Piezon) and the ...

Title of Thesis: DEVELOPMENT OF A PROTOTYPE MAGNETOSTRICTIVE ENERGY HARVESTING DEVICE Mark Elliott Staley, Master of Science, 2005 Thesis directed by: Professor Alison B. Flatau Department of Aerospace Engineering To enhance performance and safety, structures of all types are made “smart” with the addition of sensors. These sensors require power, but in some cases conventional power supply meth...

In this paper we compare the effectiveness of the time, wavelet and Hilbert Huang domain analysis of waveforms from a Non Destructive Test (NDT) equipment. The analysis of the signals from NDT systems is one of the most important activities since it allows to locate the actual defects. Very often the echoes traveling back to the sensors are superimposed with the signal from the transducer. We a...

Small-aperture transducers based on the magnetostrictive effect for emission and reception of signals in ultrasonic range solid materials have been developed. The article discusses their design features specifications. Attention is paid to choice materials, shapes, geometrical dimensions excitation coil, damper, magnet. Structural electrical circuits developed are given. Some technological solu...

Single-phase magnetoelectric multiferroics are ferroelectric materials that display some form of magnetism. In addition, magnetic and ferroelectric order parameters are not independent of one another. Thus, the application of either an electric or magnetic field simultaneously alters both the electrical dipole configuration and the magnetic state of the material. The technological possibilities...

Condition assessment of cables has gained considerable attention for the bridge safety. A magnetic flux leakage and magnetostrictive guided wave hybrid transducer is provided to inspect bridge cables. The similarities and differences between the two methods are investigated. The hybrid transducer for bridge cables consists of an aluminum framework, climbing modules, embedded magnetizers and a r...

This paper addresses the modeling of strains and forces generated by magnetostrictive transducers in response to applied magnetic elds. The magnetostrictive eeect is modeled by considering both the rotation of magnetic moments in response to the eld and the elastic vibrations in the transducer. The former is modeled with the Jiles-Atherton model of ferromagnetic hysteresis in combination with a...