A weak magnetic field measurement system using micro-fluxgate sensors and delta~sigma interface

Kawahito, Shoji; Cerman, A.; Aramaki, K.; Tadokoro, Yoshiaki

doi:10.1109/tim.2003.809073

Cited by 28 publications

(8 citation statements)

References 15 publications

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“…Besides, the relationships of λ 1 and λ 2 to external magnetic field/temperature are different and independent. Therefore, according to the dual-wavelength matrix method, H and T can be measured simultaneously and uniquely by monitoring λ 1 …”

Section: Simultaneous Measurement Of Magnetic Field and Temperaturementioning

confidence: 99%

Simultaneous Measurement of Magnetic Field and Temperature Based on Magnetic Fluid-Infiltrated Photonic Crystal Cavity

Zhao

Zhang

2015

IEEE Trans. Instrum. Meas.

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A method for simultaneous measurement of magnetic field and temperature with high sensitivity and high precision was realized according to magnetic fluid (MF)-infiltrated photonic crystal cavity, where two different types of MF were, respectively, infiltrated into certain air holes adjacent to a waveguide to form two cascaded cavities. As the refractive index (RI) of MF is dependent on external magnetic field and temperature, the two independent resonant dips of cascaded cavities that can be simultaneously monitored at the output spectrum of the waveguide would all shift with the change of external magnetic field or temperature. Using finite-difference time-domain method, the RI sensitivity of the proposed cavity was firstly analyzed and optimized, and then the linear relationships between the shifts of two resonant wavelengths and external magnetic field/temperature were calculated. Finally, combined with the dual-wavelength matrix method, the magnetic field detection limit could reach to 1.333 × 10 −4 T with the uncertainty of ±0.22 × 10 −4 T (coverage factor k = 2) and detection range from 0 to 0.06 T. Simultaneously, the temperature detection limit could reach to 0.301 K with the uncertainty of ±0.051 K (k = 2) and detection range from 250 to 340 K.Index Terms-Magnetic field, magnetic fluid (MF), photonic crystal cavity, simultaneous measurement, temperature.

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Section: Simultaneous Measurement Of Magnetic Field and Temperaturementioning

confidence: 99%

Simultaneous Measurement of Magnetic Field and Temperature Based on Magnetic Fluid-Infiltrated Photonic Crystal Cavity

Zhao

Zhang

2015

IEEE Trans. Instrum. Meas.

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“…the actuation signal and the demodulation method) is an important issue to achieve maximum results [33,34]. the actuation signal and the demodulation method) is an important issue to achieve maximum results [33,34].…”

Section: Excitation Coilmentioning

confidence: 99%

Inductive and Magnetic Sensors

Regtien

2012

Sensors for Mechatronics

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“…The FG is a non-linear sensor [1], which does not perform any inherent smoothing of the incident field, and a closed-loop measurement is necessary to increase the linear range of the sensor. Recent attempts to return a 1-bit magnetic field have shown linearity limitations [3,4]. Consequently, a low-pass filtering of the 1-bit IIR output is required for high resolution architectures.…”

Section: B Fully Low-pass Asic : Architecture and Designmentioning

confidence: 99%

“…Recently, Σ∆-based interfaces for µFG have been proposed, with the modulator either used as a D/A converter (DAC) in the feedback loop [4], or being itself the feedback loop with the sensor inserted in the first stage [5]. Though, while these architectures take the right path to miniaturization and digitalization, they still use designchallenging analog blocks [6].…”

Section: Introductionmentioning

confidence: 99%

A Sigma-Delta closed-loop digital microfluxgate magnetometer

Gayral

Delevoye

Condemine

et al. 2006

2006 13th IEEE International Conference on Electronics, Circuits and Systems

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This paper presents the concept and the design of a new architecture for microfluxgate sensors. An innovative lowpass architecture based on pulsed excitation is presented, with a Σ∆-based closed-loop measurement circuit including digital and semi-digital filters. While the total power consumption is reduced to about 20mW, it also allows a power/resolution tradeoff for a digitally-controlled tunable magnetometer.

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A weak magnetic field measurement system using micro-fluxgate sensors and delta~sigma interface

Cited by 28 publications

References 15 publications

Simultaneous Measurement of Magnetic Field and Temperature Based on Magnetic Fluid-Infiltrated Photonic Crystal Cavity

Simultaneous Measurement of Magnetic Field and Temperature Based on Magnetic Fluid-Infiltrated Photonic Crystal Cavity

Inductive and Magnetic Sensors

A Sigma-Delta closed-loop digital microfluxgate magnetometer

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