Abstract
This paper developed a novel surface acoustic wave (SAW) current sensor utilizing the magnetostrictive effect. The sensor was composed of a differential delay-line oscillation configuration, and a magnetostrictive FeCo film coated onto the surface of the sensing SAW device. The FeCo coating produces magnetostrictive strain under the magnetic field induced by the applied current, then, leading to changes in the SAW propagation velocity. Hence, the corresponding differential oscillation frequency shift was used to evaluate the applied current. To realize better temperature compensation, a SiO 2 thin film was deposited onto the SAW device surface, which exhibits opposing polarity of temperature coefficient of frequency (Tcf) to the LiNbO 3 substrate used in the SAW device. Using the Helmholtz coil, the developed SAW current sensor was characterized, high sensitivity, and good linearity were observed in the current experiment.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
