Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1995-09-12
1997-11-11
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetometers
33356, 1286531, 32420712, 324225, 324247, 324248, G01R 3302, G01R 33022, A61B 505
Patent
active
056868367
ABSTRACT:
An apparatus for measuring a weak magnetic field in a background D.C. magnetic field such as the earth's magnetic field or the like includes a magnetic pickup portion that is supported by a support mechanism which does not impede minute movement in the x- and y-axis direction. A pair of A.C. linear gradient magnetic fields whose directions of gradients are parallel to the x-axis and y-axis, respectively, are used for obtaining reference signals for sensing the position of the pickup portion. The frequencies of the A.C. linear gradient magnetic fields are set to be sufficiently higher than the frequency of the weak magnetic field that is to be measured. The A.C. linear gradient magnetic fields are provided by A.C. current flowing in two pairs of linear conductors which are perpendicular to each other.
REFERENCES:
patent: 3557777 (1971-01-01), Cohen
patent: 4362992 (1982-12-01), Young et al.
patent: 4913152 (1990-04-01), Ko et al.
patent: 5343707 (1994-09-01), Sata
Abe et al.: The 7th Japan Biological Magnet Society Symposium B2-12, 1992), vol. 5, No. 1.
Sasada Ichiro
Yamauchi Takao
Kyushu University
Strecker Gerard R.
LandOfFree
Apparatus for reducing noise due to sensor vibration during meas does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for reducing noise due to sensor vibration during meas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for reducing noise due to sensor vibration during meas will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1232063