NDLI: Consideration on Low Frequency Magnetic Field Noise from Electric Train for Design of Magnetic Shielded Room for Bio-Magnetics Measurement

Content Provider	IEEE Xplore Digital Library
Author	Yamazaki, K. Kotani, M. Uchikawa, Y.
Copyright Year	1985
Abstract	There have been virtually no reports on the origin of environmental magnetic fields which act as noise sources in biomagnetic measurements, despite its importance to the design of magnetic shielded rooms and to the quality of signals obtained in biomagnetics experiments. In this paper, the measured variation of environmental magnetic fields at three locations-- Tokyo Denki University, Hokkaido University, and the Research Laboratory of Takenaka Corp.--is described, and the origin of magnetic field noise is discussed with reference to magnetic fields generated by electric trains. Near railways, large variations in magnetic field are observed due to imbalance between the feeder line and return rail line. Simulations confirmed that trains are especially prone to generate fields in the X-axis direction (perpendicular to the direction of train travel).
Starting Page	519
Ending Page	524
Page Count	6
File Size	1031122
File Format	PDF
ISSN	08824959
Volume Number	7
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1992-07-01
Publisher Place	Hiroshima, Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic shielding Magnetic field measurement Low-frequency noise Magnetic noise Biomagnetics Frequency measurement Electric variables measurement Noise measurement Working environment noise Rail transportation
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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