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Home > Issues > RetrieveSearch Coil Magnetometer Based on Multi-parameter Joint Optimization Design in Ultra Low-Frequency Communication
Journal of Magnetics, Volume 23, Number 2, 30 Jun 2018, Pages 312-317
Chunteng Li (College of Electronic Engineering, Naval University of Engineering), Yuzhong Jiang * 
(College of Electronic Engineering, Naval University of Engineering), Guanghui Yang (College of Electronic Engineering, Naval University of Engineering), Fangjun Liu (Academy of Mathematics and Computer Science, Yunnan Nationalities University)
(College of Electronic Engineering, Naval University of Engineering), Guanghui Yang (College of Electronic Engineering, Naval University of Engineering), Fangjun Liu (Academy of Mathematics and Computer Science, Yunnan Nationalities University)
Abstract
In order to design a kind of high-sensitive, narrow-band and portable search coil magnetometer, based on the principle of magnetic measuring, an equivalent model of search coil magnetometer with parallel matched
capacitor is established. The formula of the induced coil is derived, low-noise integrated operational amplifier is designed and made as the preamplifier circuit of search coil magnetometer. The parameters of the inductive
coil based on multi-parameter joint optimization are obtained under consideration of the sensitivity, bandwidth, weight and volume of the inductive coil simultaneously. The search coil magnetometer test is completed
in the electromagnetic shielding room. And the result shows that the sensitivity of the designed search coil magnetometer is 40 fT/ @80 Hz, under the precondition of guaranteeing the weight, volume and bandwidth,
which is basically the same as that of the simulation.
capacitor is established. The formula of the induced coil is derived, low-noise integrated operational amplifier is designed and made as the preamplifier circuit of search coil magnetometer. The parameters of the inductive
coil based on multi-parameter joint optimization are obtained under consideration of the sensitivity, bandwidth, weight and volume of the inductive coil simultaneously. The search coil magnetometer test is completed
in the electromagnetic shielding room. And the result shows that the sensitivity of the designed search coil magnetometer is 40 fT/ @80 Hz, under the precondition of guaranteeing the weight, volume and bandwidth,
which is basically the same as that of the simulation.
Keywords: Ultra-low frequency; search coil magnetometer; operational amplifier; sensitivity; narrow band; portability
DOI: https://doi.org/10.4283/JMAG.2018.23.2.312
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