A three-axial search coil magnetometer optimized for small size, low power, and low frequencies

Asaf Grosz; Eugene Paperno; Shai Amrusi; Boris Zadov

doi:10.1109/JSEN.2010.2079929

A three-axial search coil magnetometer optimized for small size, low power, and low frequencies

Asaf Grosz, Eugene Paperno, Shai Amrusi, Boris Zadov

Department of Electrical & Computer Engineering

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

45 Scopus citations

Abstract

A compact and sensitive three-axial search coil magnetometer has been designed, built, and tested. The magnetometer sensitivity threshold equals 12 pT/Hz^0.5 at 1 Hz, and the magnetometer dimensions are 72 mm × 69 mm × 69 mm. All the magnetometer coils, the electronics, and batteries are accommodated within a single electrostatic shield and a single housing. A close to 2 aspect ratio (30 mm diameter, 58 mm total length) of the search coils provides a very high (∼ 70%) volume utilization factor. Such a small aspect ratio is obtained due to employing 30-mm diameter, 4-mm thick flux concentrators. The magnetometer is optimized for 20 mHz to 7 Hz frequencies and for ultra-low (252 μW) power consumption. The ultra-low-power consumption enables a seven-year continuous operation from the four 1/2AA lithium batteries. The effect of the integration of three orthogonal search coils on the magnetometer sensitivity and accuracy has been investigated.

Original language	English
Article number	5585675
Pages (from-to)	1088-1094
Number of pages	7
Journal	IEEE Sensors Journal
Volume	11
Issue number	4
DOIs	https://doi.org/10.1109/JSEN.2010.2079929
State	Published - 25 Feb 2011

Keywords

Compact
low frequency
magnetometer
search coil
three-axial
ultra-low power

ASJC Scopus subject areas

Instrumentation
Electrical and Electronic Engineering

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10.1109/JSEN.2010.2079929

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title = "A three-axial search coil magnetometer optimized for small size, low power, and low frequencies",

abstract = "A compact and sensitive three-axial search coil magnetometer has been designed, built, and tested. The magnetometer sensitivity threshold equals 12 pT/Hz0.5 at 1 Hz, and the magnetometer dimensions are 72 mm × 69 mm × 69 mm. All the magnetometer coils, the electronics, and batteries are accommodated within a single electrostatic shield and a single housing. A close to 2 aspect ratio (30 mm diameter, 58 mm total length) of the search coils provides a very high (∼ 70%) volume utilization factor. Such a small aspect ratio is obtained due to employing 30-mm diameter, 4-mm thick flux concentrators. The magnetometer is optimized for 20 mHz to 7 Hz frequencies and for ultra-low (252 μW) power consumption. The ultra-low-power consumption enables a seven-year continuous operation from the four 1/2AA lithium batteries. The effect of the integration of three orthogonal search coils on the magnetometer sensitivity and accuracy has been investigated.",

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note = "Funding Information: Manuscript received July 30, 2010; revised September 03, 2010; accepted September 05, 2010. Date of publication September 27, 2010; date of current version February 16, 2011. This work was supported in part by Analog Devices, Inc., National Instruments, Inc., and the Ivanier Center for Robotics Research and Production Management. The associate editor coordinating the review of this paper and approving it for publication was Prof. Evgeny Katz.",

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N1 - Funding Information: Manuscript received July 30, 2010; revised September 03, 2010; accepted September 05, 2010. Date of publication September 27, 2010; date of current version February 16, 2011. This work was supported in part by Analog Devices, Inc., National Instruments, Inc., and the Ivanier Center for Robotics Research and Production Management. The associate editor coordinating the review of this paper and approving it for publication was Prof. Evgeny Katz.

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A three-axial search coil magnetometer optimized for small size, low power, and low frequencies

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Keywords

ASJC Scopus subject areas

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