Improved Magnetic Frequency Conversion Approach for Magnetoelectric Sensors

被引：4

作者：

Durdaut, Phillip ^{[1
]}

Salzer, Sebastian ^{[1
]}

Reermann, Jens ^{[2
]}

Robisch, Volker ^{[3
]}

McCord, Jeffrey ^{[4
]}

Meyners, Dirk ^{[3
]}

Quandt, Eckhard ^{[3
]}

Schmidt, Gerhard ^{[2
]}

Knochel, Reinhard ^{[1
]}

Hoft, Michael ^{[1
]}

机构：

[1] Microwave Engineering, Christian-Albrechts-Universitat zu Kiel, Kiel,24143, Germany

[2] Digital Signal Processing and System Theory, Christian-Albrechts-Universitat zu Kiel, Kiel,24143, Germany

[3] Inorganic Functional Materials, Christian-Albrechts-Universitat zu Kiel, Kiel,24143, Germany

[4] Nanoscale Magnetic Materials, Christian-Albrechts-Universitat zu Kiel, Kiel,24143, Germany

来源：

IEEE Sensors Letters | 2017年 / 1卷 / 03期

关键词：

Analog to digital conversion - Digital to analog conversion - Magnetostrictive devices - Natural frequencies;

D O I：

10.1109/LSENS.2017.2699559

中图分类号：

学科分类号：

摘要：

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. © 2017 IEEE.

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