Amorphous wire MI micro magnetic sensor for gradient field detection

Journal Article · Sun Sep 01 04:00:00 UTC 1996 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.539296· OSTI ID:403365

Bushida, K; Mohri, K; Kanno, T; Katoh, D; Kobayashi, A ^[1]

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1. Nagoya Univ. (Japan). Dept. of Electrical Engineering

Sensitive and quick response micro magnetic sensor for detection of a very localized field (gradient field) canceling background disturbance field is presented using a high frequency (20--40 MHz) multivibrator having a pair of amorphous wire MI head of 1--3 mm length each. The resolution of field detection is 10{sup {minus}6} Oe for ac field and the cut-off frequency is about 200 kHz. Stable detection of a surface field of a densely magnetized ring magnet with 19 mm diameter and 2,000 poles (30 {micro}m in pole interval) for a high resolution rotary encoder was carried out with a sinusoidal waveform.

• OSTI ID: 403365
• Report Number(s): CONF-960425--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 5Pt2 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BORON ALLOYS
COBALT ALLOYS
DESIGN
IRON ALLOYS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETOSTRICTION
SILICON ALLOYS
VIBRATING SAMPLE MAGNETOMETERS