Transmission method and system using a standard transmission network for connecting elements of a seismic device
US6459654B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Mar 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Transmission method for connecting together a central control and seismic recording station (SCC), local intermediate control and concentration stations (RRS) and local seismic data acquisition, processing and transmission units (RTU). It comprises using a transmission network (L, RFi) working according to a particular transmission protocol in order to interconnect the central station and the intermediate stations for example, previous measurement of the data transit time on the transmission channels between the central station and acquisition units (RTU), pretriggering of seismic data acquisition by acquisition units (RTU), the holding time interval in relation to the time of reception of reference signal (TB) being fixed and greater than the transit time, and applying to reference signal (TB), in the intermediate station, an adjusted compensation delay to take account of the effective transfer time fluctuations linked with its passage through multitask control means of the intermediate stations and transmission network (L, RFi) in order to respect the holding time interval. All the acquisition units can thus be perfectly synchronized. The system can be applied for transmission of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.