Title :
Coupling nonlinear sensors for enhanced sensitivity: a prototype using the 3 coupled-core fluxgate magnetometer
Author :
In, Visarath ; Kho, Andy ; Bulsara, Adi R. ; Neff, Joseph D. ; Baglio, Salvatore ; Sacco, Vincenzo ; Palacios, Antonio ; Longhini, Patrick
Author_Institution :
Space & Naval Warfare Syst. Center San Diego, CA
fDate :
Oct. 30 2005-Nov. 3 2005
Abstract :
Recently, we have shown the emergence of oscillations in overdamped undriven nonlinear dynamic systems subject to carefully crafted coupling schemes and operating conditions [In, 2003], [Bulsara, 2004]. Here, we present results obtained from a system of N equiv 3 coupled-core fluxgate magnetometer system; the oscillatory behavior is triggered when the coupling constant exceeds a threshold value (bifurcation point), and the oscillation frequency exhibits a characteristic scaling behavior with the "separation" of the coupling constant from its threshold value, as well as with an external target dc magnetic flux signal. The oscillations, which can be induced at frequencies ranging from a few Hz to high-kHz, afford a novel new detection scheme for target signals; in addition, the coupled-core system offers the possibility of significantly enhanced responsivity over its single fluxgate counterpart
Keywords :
electromagnetic oscillations; magnetic flux; magnetic sensors; magnetometers; coupling constant; enhanced sensitivity; fluxgate magnetometer; magnetic flux signal; nonlinear sensor; oscillation frequency; oscillatory behavior; scaling behavior; Couplings; Frequency; Magnetic cores; Magnetic field measurement; Magnetic sensors; Magnetometers; Nonlinear dynamical systems; Potential energy; Prototypes; Writing;
Conference_Titel :
Sensors, 2005 IEEE
Conference_Location :
Irvine, CA
Print_ISBN :
0-7803-9056-3
DOI :
10.1109/ICSENS.2005.1597636