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Proceedings Paper

Exploiting nonlinearity in an advanced dynamic magnetometer for UGS and MDA applications
Author(s): A. R. Bulsara; V. In; A. Kho; P. Longhini; S. Baglio; B. Ando
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Paper Abstract

Recently, we have shown the emergence of oscillations in overdamped undriven nonlinear dynamic systems subject to carefully crafted coupled schemes and operating conditions. Here, we summarize these results for a system of N = 3 coupled ferromagnetic cores, the underpinning of a "coupled-core fluxgate magnetometer" (CCFM): the oscillatory behaviour is triggered when the coupling constant exceeds a threshold value (bifurcation point), and the oscillation frequency exhibits a characteristic scaling behaviour with the "separation" of the coupling constant from its threshold value, as well as with an external "target" dc magnetic flux signal. We present assorted performance figures of the magnetometer, and also describe figure of merit (to characterize the device) that includes the effects of the sensor noise-floor as well its sensitivity.

Paper Details

Date Published: 16 April 2008
PDF: 12 pages
Proc. SPIE 6963, Unattended Ground, Sea, and Air Sensor Technologies and Applications X, 696316 (16 April 2008); doi: 10.1117/12.782757
Show Author Affiliations
A. R. Bulsara, Space and Naval Warfare Systems Ctr. (United States)
V. In, Space and Naval Warfare Systems Ctr. (United States)
A. Kho, Space and Naval Warfare Systems Ctr. (United States)
P. Longhini, Space and Naval Warfare Systems Ctr. (United States)
S. Baglio, Univ. degli Studi di Catania (Italy)
B. Ando, Univ. degli Studi di Catania (Italy)


Published in SPIE Proceedings Vol. 6963:
Unattended Ground, Sea, and Air Sensor Technologies and Applications X
Edward M. Carapezza, Editor(s)

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