Seismic signal transmission system using relay radios

Details Seismic signal transmission system using relay radios Seismic signal transmission system using relay radios

1987-06-01

1989-03-21

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

455 7, G01V 122

Patent

active

048150444

ABSTRACT:
A system is provided for radio transmission between a central control and recording laboratory and spaced apart acquisition boxes in which relay transmission units are used for communicating with boxes which are directly inaccessible. It includes a centralization unit adapted for managing the exchanges of orders or data from the central laboratory with directly accessible boxes by means of a radio link in a first frequency band (f2), on the one hand and with the relay units by means of a radio link in another frequency band (f1). These latter manage the radio links with the inaccessible boxes by means of radio links at a frequency (f3) distinct from (f2). The relay units and the centralization unit are programmed for automatically managing the links between the central laboratory and any one of the boxes, whether they are direct or indirect, and, on the other hand, for reserving a part of the interrogation time of each box for the transmission of service data indicative of their correct operation.

REFERENCES:
patent: 2864943 (1958-12-01), Schultz
patent: 3678387 (1972-07-01), Wilson
patent: 3987406 (1976-10-01), Broding
patent: 4086504 (1978-04-01), Ezell et al.
patent: 4230989 (1980-10-01), Buehrle
patent: 4553262 (1985-11-01), Coe
patent: 4578815 (1986-03-01), Persinotti
"Using Radio Links and Relays," Dodvill et al.

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