Wireless data coupling system and method
US5019814A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1988 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Apr 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/801
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless data coupling system for transmitting data such as torque from a rotating shaft to a stationary receiver includes at least one photocell on the shaft along with a corresponding stationary light source for illuminating the photocells. This powers the rotating components. From a data standpoint an analog signal from a strain gauge is converted to a digital signal which is transmitted bit by bit by a pair of light emitting diodes one of which acts as a data sync. The stationary receiver contains columns of phototransistors to receive both the data and data sync pulses. Initiation of the transmission of data is started by a start pulse which occurs first in time and thereafter send pulses from the stationary system actuate the data and data sync pulses from the rotating system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.