Remote passive identification system
US4510495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1982 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Aug 9, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q10/087
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for passively identifying remote objects such as livestock is disclosed. A power transmitter transmits a plurality of radio frequency burst signals at a given frequency, and a uniquely coded transponder associated with the object to be identified produces a plurality of coded identification signals in response to the burst signals from the transmitter. The coded identification signals are read by a receiver to identify the object. The transmitter and receiver are time division multiplexed for alternate operation. Accordingly, when an object is to be identified, the transmitter is switched on to transmit the burst signals, thereby activating the transponder to produce the coded identification signals. The transmitter is then switched off and the receiver switched on to receive the identification signals for identifying the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.