Method and apparatus for signal recognition in a remote control system with influencing of the zero point transition of the alternating-current mains voltage
US4340880A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Sep 9, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/121
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a remote control system which generates a remote control signal by a temporary short-circuit on the secondary side of a transformer during an influencing period or time span about a zero point transition of the alternating-current mains voltage, a considerable improvement in the receiver-side recognition or detection of the remote control signal can be accomplished by a different determination, in relation to the prior art, of the receiver-side comparison period as concerns its start and duration. There is correlated the comparison period to the course of the receiver-side alternating-current mains voltage before the mains voltage zero transition to be monitorerd. This system may be used in remote control technology using signal transmission on a power supply network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.