Amorphous wire MI micro magnetic sensor for gradient field detection
Journal Article
·
· IEEE Transactions on Magnetics
- 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
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