The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2002
Filed:
Sep. 22, 2000
Rénate Bary, Rueil Malmaison, FR;
Michel Guion, Puteaux, FR;
Institut Francais du Petrole, Rueil-Malmaison cedex, FR;
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 a TB concomitant with the triggering of a seismic source for example.