Magnetoelectric gradiometer with enhanced vibration rejection efficiency under H-field modulation
Abstract
A magnetoelectric (ME) gradiometer consisting of two Metglas/Pb(Zr,Ti)O3 fiber-based sensors has been developed. The equivalent magnetic noise of both sensors was first determined to be about 60 pT/√Hz while using an H-field modulation technique. The common mode rejection ratio of a gradiometer based on these two sensors was determined to be 74. The gradiometer response curve was then measured, which provided the dependence of the gradiometer output as a function of the source-gradiometer-normalized distance. Investigations in the presence of vibration noise revealed that a ME gradiometer consisting of two ME magnetometers working under H-field modulation was capable of significant vibration rejection. The results were compared to similar studies of ME gradiometers operated in a passive working mode. Our findings demonstrate that this active gradiometer has a good vibration rejection capability in the presence of both magnetic signals and vibration noise/interferences by using two magnetoelectric sensors operated under H-field modulation.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 09, 2018
- Source ID
- 10.1063/1.5017726
Entities
People
- Chung Ming Leung
- D. Viehland
- Jiefang Li
- Junran Xu
- Margo Staruch
- Peter Finkel
- Xin Zhuang
Organizations
- Office of Naval Research Global
- United States Naval Research Laboratory
- Virginia Tech