Air gun firing control

Details Air gun firing control Air gun firing control

1977-01-24

1978-08-15

Birmiel, Howard A.

Acoustics

Geophysical or subsurface exploration

Programmed or timer-controlled

181119, 181120, G01V 108

Patent

active

041065859

ABSTRACT:
A method and apparatus for controlling the firing of a seismic source, wherein the firing circuit is coupled to the source by a two-conductor cable whose impedence is changed upon firing of the source. The change in cable impedence is detected and the time delay between the firing command signal and the detected change is used to control the firing command signal in order that a plurality of sources may be fired in a desired sequence.

REFERENCES:
patent: 3638752 (1972-02-01), Wakefield
patent: 3687218 (1972-09-01), Ritter
patent: 3985199 (1976-10-01), Baird
patent: 4034827 (1977-07-01), Leerskov, Jr. et al
patent: 4047591 (1977-09-01), Ward et al.

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