SYSTEM AND METHOD OF DETECTING THE PROXIMITY OF AN ALTERNATING MAGNETIC FIELD
Assignee
BRITISH AEROSPACE PUBLIC LIMITED COMPANY
Filed
Jan 30, 1978
Granted
Dec 7, 1982
Location
100 PALL MALL, LONDON, SW1Y 5HR ENGLAND
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.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jan 22, 1982
Rescinded
Apr 12, 1982
Duration
2 months
Record Details
- Patent number
- US 4362992
- Application
- 05876302
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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