Improved Magnetic Frequency Conversion Approach for Magnetoelectric Sensors

Durdaut, Phillip, Salzer, Sebastian, Reermann, Jens, Robisch, Volker, McCord, Jeffrey, Meyners, Dirk, Quandt, Eckhard, Schmidt, Gerhard, Knochel, Reinhard and Hoft, Michael (2017) Improved Magnetic Frequency Conversion Approach for Magnetoelectric Sensors IEEE Sensors Letters, 1 (3). pp. 1-4. DOI 10.1109/LSENS.2017.2699559.

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Abstract

Thin-film magnetoelectric sensors reach a sensitivity in the picotesla range around the resonance frequency of the mechanical structure. Using magnetic frequency conversion, a magnetic low-frequency signal can be transferred to the sensor's resonance frequency. However, the required additional large carrier signal leaks to the sensor's output with a large amplitude, requiring a wide dynamic range of the sensor electronics. In this paper, it is shown that the unbalance of the magnetostriction curve is responsible for this leakage and that a suppression approach is devised. After theoretical analysis of the nonlinear magnetostriction characteristic, a carrier suppression is achieved through balancing by an altered signal excitation. A suppression of the carrier signal of about three orders of magnitude is measured. Thus, the requirements regarding analog-to-digital conversion can be reduced.

Document Type: Article
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
DOI etc.: 10.1109/LSENS.2017.2699559
ISSN: 2475-1472
Date Deposited: 20 Dec 2017 10:44
Last Modified: 05 Apr 2018 13:00
URI: http://eprints.uni-kiel.de/id/eprint/40992

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