Apparatus for generating a nutating electromagnetic field
US4017858A · kind A · utility
281Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G7/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A field (e.g., a magnetic field) which nutates about a pointing vector is used to both track or locate an object in addition to determining the relative orientation of this object. Apparatus for generating such a field includes mutually orthogonal coils and circuitry for supplying an unmodulated carrier, hereafter called DC signal, to one coil and an AC modulated carrier signal, hereafter called AC signal, to at least one (usually two) other coil, such that the maximum intensity vector of a magnetic field produced by the currents in the coils nutates about a mean axis called the pointing vector direction of the field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.