A pulse-position modulator-type magnetometer

Stricker, S.; Wulkan, A. A.

doi:10.1109/tce.1961.6373111

Cited by 4 publications

(3 citation statements)

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“…Hence, the measurement of the magnetic field amplitude via a voltage measurement in the fluxgate is replaced by a high accuracy time measurement that can be rendered more impervious to clutter signals and noise via an understanding of the device response in the presence of a noise floor. Such a (deterministic) "time-domain" description was first introduced by Strycker and Wulkan [26]. …”

Section: Magnetic Sensorsmentioning

confidence: 99%

Symmetry-Breaking as a Paradigm to Design Highly-Sensitive Sensor Systems

Palacios

Longhini

2015

Symmetry

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A large class of dynamic sensors have nonlinear input-output characteristics, often corresponding to a bistable potential energy function that controls the evolution of the sensor dynamics. These sensors include magnetic field sensors, e.g., the simple fluxgate magnetometer and the superconducting quantum interference device (SQUID), ferroelectric sensors and mechanical sensors, e.g., acoustic transducers, made with piezoelectric materials. Recently, the possibilities offered by new technologies and materials in realizing miniaturized devices with improved performance have led to renewed interest in a new generation of inexpensive, compact and low-power fluxgate magnetometers and electric-field sensors. In this article, we review the analysis of an alternative approach: a symmetry-based design for highly-sensitive sensor systems. The design incorporates a network architecture that produces collective oscillations induced by the coupling topology, i.e., which sensors are coupled to each other. Under certain symmetry groups, the oscillations in the network emerge via an infinite-period bifurcation, so that at birth, they exhibit a very large period of oscillation. This characteristic renders the oscillatory wave highly sensitive to symmetry-breaking effects, thus leading to a new detection mechanism. Model equations and bifurcation analysis are discussed in great detail. Results from experimental works on networks of fluxgate magnetometers are also included.

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Section: Magnetic Sensorsmentioning

confidence: 99%

Symmetry-Breaking as a Paradigm to Design Highly-Sensitive Sensor Systems

Palacios

Longhini

2015

Symmetry

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“…Hence, the measurement of the magnetic-field amplitude via a voltage measurement in the fluxgate is replaced by a high-accuracy time measurement that can be rendered more impervious to clutter signals and noise via an understanding of the device response in the presence of a noise floor. Such a (deterministic) "time-domain" description was first introduced by Strycker and Wulkan [42]. The simplest implementation of our "residencetimes" fluxgate (RT-fluxgate) is shown in Fig.…”

Section: Scfg Magnetometermentioning

confidence: 99%

Exploiting Nonlinear Dynamics in Novel Measurement Strategies and Devices: From Theory to Experiments and Applications

Baglio

Bulsara

Andò

et al. 2011

IEEE Trans. Instrum. Meas.

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This paper is focused on the exploitation of intrinsic nonlinear dynamics toward novel measurement systems and readout methodologies. In particular, sensors that can be represented as nonlinear dynamical systems and are often reducible to systems described by a static nonlinearity are considered; the nonlinear behavior therefore reduces to the dynamics of a system characterized by two or more (meta)stable equilibrium states (or attractors) separated by energetic thresholds to be overcome to transition from one attractor to the other. The presence of a weak unknown target signal is assessed via the monitoring of the "residence times" in the attractors. This operational scenario that is based on the monitoring of suitable "events" avoids an "amplitude-based" readout and provides a very simple and sensitive readoutprocessing scheme. Many noise effects are also mitigated by the intrinsic decoupling between the amplitude domain of the input signal and the event or time domain of the output signal. We present here the general transduction methodology for this class of "residence-times difference" sensors, together with the experimental results obtained from the working versions of these sensors (in particular, a simple fluxgate magnetometer). We then introduce some novel dynamical behavior that occurs when the active nonlinear (in this case, bistable) elements are coupled using well-crafted coupling topologies. Sensors based on these coupling schemes provide several advantages over their single-element counterparts. We discuss the dynamics of the coupled-element device, summarizing recent theoretical and experimental results. Finally, we Manuscript

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“…Magnetfeldmessungen mit Hilfe von Erdsatelliten werden mit kreisringförmigen derartigen Sonden durchgeführt [12], [13], Es kann auch die Phasenmodulation der Spannungsimpulse ausgewertet werden [14], Weitere Ausführungen dieses Feldmeßverfahrens werden in [15], [16], [17] beschrieben, darunter auch solche mit hoher Empfindlichkeit [16], 1.5 Hallgeneratoren. Mit Hallgeneratoren, die über getrennte Stromversorgungsgeräte auf gleiche Empfindlichkeit justiert werden, werden Felder in Motoren und Generatoren an bis zu 10 Meßstellen gemessen [18], [19].…”

Section: Messung Magnetischer Felderunclassified

Magnetische Messungen

Hermann¹

1964

tm - Technisches Messen

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A pulse-position modulator-type magnetometer

Cited by 4 publications

References 0 publications

Symmetry-Breaking as a Paradigm to Design Highly-Sensitive Sensor Systems

Symmetry-Breaking as a Paradigm to Design Highly-Sensitive Sensor Systems

Exploiting Nonlinear Dynamics in Novel Measurement Strategies and Devices: From Theory to Experiments and Applications

Magnetische Messungen

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