NDLI: A Fully Integrated Ring-Type Fluxgate Sensor Using A Localized Core Saturation Method

Content Provider	IEEE Xplore Digital Library
Author	Wu, P. Ahn, C.H.
Copyright Year	2006
Description	Author affiliation: Cincinnati Univ., Cincinnati (Wu, P.; Ahn, C.H.)
Abstract	This paper reports a new micromachined fluxgate sensor with extremely low power consumption using a localized core saturation method. The extremely low power consumption has been achieved by shrinking the magnetic core width wound by the sensing coils, 10 times smaller than that wound by the excitation coils. With such core configuration, the magnetic field within sensing coils will be enhanced several times larger than that within excitation coils. This will thus allow the fluxgate sensor to be operated in a localized core saturation mode. That is, only relatively small amount of excitation current is needed to saturate the sensing core and induce the fluxgate effect at the sensing coils while the excitation core is not saturated yet. The device exhibits a power consumption of ~4 mW, sensitivity of 600 V/T at 60 muT, and sensor span of ~250 muT In comparison with our previously reported micro-fluxgate sensor the newly developed sensor consumes 25 times less power but at the expense of sensor span and linearity.
Starting Page	878
Ending Page	878
File Size	78030
Page Count	1
File Format	PDF
ISBN	1424414792
DOI	10.1109/INTMAG.2006.374909
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Intermag Conference
Subject Keyword	Magnetic sensors Magnetic cores Coils Sensor phenomena and characterization Energy consumption Wounds Solid modeling Saturation magnetization Resists Power engineering computing
Content Type	Text
Resource Type	Article

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