Single-board low-noise fluxgate magnetometer

T. Dyer; P.F. Griffin; E. Riis

doi:10.1063/5.0175418

Single-board low-noise fluxgate magnetometer

T. Dyer, P.F. Griffin, E. Riis

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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Abstract

Low-noise fluxgate magnetometers are normally comprised of three separate devices: a power supply, the sensor head/electronics and an analog-to-digital converter (ADC). This paper presents a parallel rod fluxgate magnetometer in a single printed circuit board of size = 5 × 12 cm, weight = 45 g, and sensor head average power dissipation = 40mW. The open-loop noise spectral density = 5 pTrms / √Hz @ 1 Hz, competitive with state-of-the-art devices. This is realized using a new amorphous wire core material and programmable mixed-signal electronics with low amplifier and ADC noise. We have compared the sensor performance to a low-noise observatory magnetometer and found sub-nT correlation when tracking the Y (East-West) component of the Earth's geomagnetic field.

Original language	English
Article number	034501
Number of pages	6
Journal	Journal of Applied Physics
Volume	135
Issue number	3
Early online date	17 Jan 2024
DOIs	https://doi.org/10.1063/5.0175418
Publication status	Published - 21 Jan 2024

Funding

The authors would like to thank Gary Kendall, Ciarán Beggan, John McFadden, Iain Chalmers, and Marcin Mrozowski for useful discussions. The results presented in this paper rely on the data collected at Eskdalemuir observatory. We thank British Geological Survey for supporting its operation and INTERMAGNET for promoting high standards of magnetic observatory practice (www.intermagnet.org). This work was funded in part by a Faraday Institution Industrial Fellowship for T. Dyer in partnership with CDO2Ltd, Sussex Innovation Centre, Science Park Square, Brighton BN1 9SB, UK.

Keywords

magnetometer
geophysics
analog-to-digital converter
magnetic field sensors
anthropogenic
signal processing

Access to Document

10.1063/5.0175418Licence: CC BY 4.0

Dyer-etal-JAP-2024-Single-board-low-noise-fluxgate-magnetometerFinal published version, 2.11 MBLicence: CC BY 4.0

Flux-gate magnetometer array
Dyer, T. (Principal Investigator)
Faraday Institution (The)
1/10/22 → 30/09/23
Project: Research Fellowship

Data for: “Single-board low-noise fluxgate magnetometer”
Dyer, T. (Creator), University of Strathclyde, 8 Jan 2024
DOI: 10.15129/f2c59f69-a82a-41f2-a068-77b07e2607c8
Dataset

Cite this

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title = "Single-board low-noise fluxgate magnetometer",

abstract = "Low-noise fluxgate magnetometers are normally comprised of three separate devices: a power supply, the sensor head/electronics and an analog-to-digital converter (ADC). This paper presents a parallel rod fluxgate magnetometer in a single printed circuit board of size = 5 × 12 cm, weight = 45 g, and sensor head average power dissipation = 40mW. The open-loop noise spectral density = 5 pTrms / √Hz @ 1 Hz, competitive with state-of-the-art devices. This is realized using a new amorphous wire core material and programmable mixed-signal electronics with low amplifier and ADC noise. We have compared the sensor performance to a low-noise observatory magnetometer and found sub-nT correlation when tracking the Y (East-West) component of the Earth's geomagnetic field.",

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N2 - Low-noise fluxgate magnetometers are normally comprised of three separate devices: a power supply, the sensor head/electronics and an analog-to-digital converter (ADC). This paper presents a parallel rod fluxgate magnetometer in a single printed circuit board of size = 5 × 12 cm, weight = 45 g, and sensor head average power dissipation = 40mW. The open-loop noise spectral density = 5 pTrms / √Hz @ 1 Hz, competitive with state-of-the-art devices. This is realized using a new amorphous wire core material and programmable mixed-signal electronics with low amplifier and ADC noise. We have compared the sensor performance to a low-noise observatory magnetometer and found sub-nT correlation when tracking the Y (East-West) component of the Earth's geomagnetic field.

AB - Low-noise fluxgate magnetometers are normally comprised of three separate devices: a power supply, the sensor head/electronics and an analog-to-digital converter (ADC). This paper presents a parallel rod fluxgate magnetometer in a single printed circuit board of size = 5 × 12 cm, weight = 45 g, and sensor head average power dissipation = 40mW. The open-loop noise spectral density = 5 pTrms / √Hz @ 1 Hz, competitive with state-of-the-art devices. This is realized using a new amorphous wire core material and programmable mixed-signal electronics with low amplifier and ADC noise. We have compared the sensor performance to a low-noise observatory magnetometer and found sub-nT correlation when tracking the Y (East-West) component of the Earth's geomagnetic field.

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KW - geophysics

KW - analog-to-digital converter

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KW - anthropogenic

KW - signal processing

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Single-board low-noise fluxgate magnetometer

Abstract

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Flux-gate magnetometer array

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Data for: “Single-board low-noise fluxgate magnetometer”

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