Method and apparatus for providing direction-indicative output s

Electricity: measuring and testing – Magnetic – Magnetometers

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G01R 3304

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active

047484080

ABSTRACT:
A magnetic direction detecting apparatus has a magnetic sensor head composed of a magnetic core, an exciting coil wound around the core and a pair of detection coils diametrically wound around the core perpendicularly to each other; an oscillator for supplying a rectangular current wave of a single polarity to the exciting coil; and a switching gate openable synchronously with the rectangular wave for permitting only peaks of the same polarity to pass therethrough. The detection of a magnetic direction by using this apparatus does not suffer from restrictions in switching gate-opening timing.

REFERENCES:
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patent: 3509424 (1970-04-01), Inouye
patent: 3638074 (1972-01-01), Inouye
patent: 4262427 (1981-04-01), Lynch et al.
patent: 4480226 (1984-10-01), Kuno et al.
patent: 4497034 (1985-01-01), Kuno et al.
patent: 4503395 (1985-03-01), Kuatzer et al.
IEEE Transactions on Geoscience Electronics, vol. GE-7, No. 45, pp. 252-260, Oct. 1969, Acuna et al, "A Miniature Two-Axis Fluxgate Magnetometer."

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