Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1992-07-24
1995-07-11
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Magnetometers
G01R 3304
Patent
active
054324459
ABSTRACT:
Provided is a magnetomoter apparatus for measuring low-level magnetic fields. The magnetometer utilizes a coil pair wound on cores of a high permeability material. These coils are driven to magnetic saturation by an energizing circuit, and develop a uniquely shaped distortion spike in their back emf having an amplitude which is directly related to the ambient magnetic field. The resulting back emf of the coils can be compared and processed to generate a measurement of the ambient magnetic field.
REFERENCES:
patent: 2406870 (1946-09-01), Vacquier
patent: 2752564 (1956-06-01), Ryerson
Medford et al., "Low power portable Geophysical Data Aquisition System and Its Use in Geomagnetic Measurments", Jul. 1981, IEEE transactions on Geoscience and Remote Sensing vol. GE19, No. 3 pp. 122-128.
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Dinsmore Robert C.
Shih Kelvin
Dinsmore Instrument Company
Snow Walter E.
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