System and method of detecting the proximity of an alternating m

Details System and method of detecting the proximity of an alternating m System and method of detecting the proximity of an alternating m

1978-01-30

1982-12-07

Buczinski, S. C.

Electricity: measuring and testing

Magnetic

Magnetometers

324260, 340657, G01R 3302

Patent

active

043629920

ABSTRACT:
A system for, and a method of, detecting the proximity of a source of an alternating magnetic field, such as that emanating from power transmission cables, comprising a sensor coil sensitive to the magnetic field under detection, processing means to derive from the signal induced in the coil a warning signal indicative of the proximity of the magnetic field under detection, and cancelling means operable to cancel the earth's field in the region of the sensor coil. The sensor coil may be one of a pair operable to provide a signal representative of the directional heading of the magnetic field under detection, with respect to the system, which embodiment is particularly useful in helicopters for detecting the proximity of power cables.

REFERENCES:
patent: 2996663 (1961-08-01), Ferguson
patent: 3488579 (1970-01-01), Schonstedt
patent: 3582932 (1971-06-01), Chapman
patent: 3624598 (1971-11-01), Foster
patent: 3745549 (1973-07-01), Jepperson et al.
patent: 3983475 (1976-09-01), Watanabe et al.

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