Optical telemetric transceiver
US4654660A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1985 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Jan 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical telemetric system for use in seismic exploration consists generally of a recorder, a plurality of transceivers, and a like number of cable sections interconnecting each transceiver in parallel with others and the recording unit. A fiber optic transmission channel is provided within each cable section and is interconnected by an optic-fiber delay loop within each transceiver, thus providing a contiguous, optically-continuous data and control channel. Within each transceiver, a logic circuit and associated data acquisition unit is optically coupled to the data and control channel so as to bidirectionally receive signals from, and transmit signals to the recorder. The logic circuit of each transceiver also is able to measure the strength of a received signal propagating in the data and control channel, and if necessary, augments the signal in the original propagation direction. An optical direction sensing circuit is interfaced with each logic circuit for electronically facing each transceiver towards the recorder. The instant invention thus reduces the effect of the series reliability law upon regenerated data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.