Open AccessWide linear range orthogonal micro‐fluxgate with multi‐segmented core
Author(s) -
Guo Bo,
Liu Shibin,
Nan Qinbo,
Yang Shanglin,
Hou Xiaowei,
Feng Wenguang
Publication year - 2014
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2013.0184
Subject(s) - fluxgate compass , row , sensitivity (control systems) , core (optical fiber) , noise (video) , electrical impedance , range (aeronautics) , materials science , mathematics , acoustics , magnetic field , physics , magnetometer , electronic engineering , electrical engineering , computer science , engineering , composite material , artificial intelligence , image (mathematics) , database , quantum mechanics
A method to increase the linear operating range and improve the sensitivity of orthogonal micro‐fluxgates through multi‐segmented core was introduced in this study. The multi‐segmented core consisted of several rows, and each row consisted of many segments. The simulated results showed that segmented cores had the same effect on increasing demagnetisation of axial direction compared with shortened cores. Moreover, metameric cores produced longer core length and more turns of detection coils, which was beneficial for sensitivity. Longer excitation wire corresponding to the multi‐segmented core produced higher input impedance, which reduced the useless power consumption in driving circuit. The test results showed that: the linear operating range increased as the number of segments; the sensitivity increased as the number of the rows; the spectrum characteristic did not disturb by increasing the number of the rows or segments; the magnetic noise increases with increasing the number of segments and decreases with increasing the number of rows; and finally the additive range of ±800 μT, sensitivity of 43.4 V/T and magnetic noise of 28.4 nT/rtHz at 1 Hz were achieved with ten rows five segments core structure in an orthogonal micro‐fluxgate.