System and method for tracking a signal source
US4067015A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1975 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | Jul 11, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for tracking moving signal sources is disclosed which is particularly adaptable for use in tracking stage performers, although a wide range of other uses is possible. A miniature transmitter is attached to the person or object to be tracked and emits a detectable signal of a predetermined frequency. A plurality of detectors positioned in a preset pattern sense the signal and supply output information to a phase detector which applies signals representing the angular orientation of the transmitter to a computer. The computer provides command signals to a servo network which drives a device such as a motor driven mirror reflecting the beam of a spotlight, to track the moving transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.