Exploiting nonlinearity in an advanced dynamic magnetometer for UGS and MDA applications

A. R. Bulsara; V. In; A. Kho; P. Longhini; S. Baglio; B. Ando

doi:10.1117/12.782757

16 April 2008 Exploiting nonlinearity in an advanced dynamic magnetometer for UGS and MDA applications

A. R. Bulsara, V. In, A. Kho, P. Longhini, S. Baglio, B. Ando

Proceedings Volume 6963, Unattended Ground, Sea, and Air Sensor Technologies and Applications X; 696316 (2008) https://doi.org/10.1117/12.782757
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

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.

Citation Download Citation

A. R. Bulsara, V. In, A. Kho, P. Longhini, S. Baglio, and B. Ando "Exploiting nonlinearity in an advanced dynamic magnetometer for UGS and MDA applications", Proc. SPIE 6963, Unattended Ground, Sea, and Air Sensor Technologies and Applications X, 696316 (16 April 2008); https://doi.org/10.1117/12.782757

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