Seismic vibrator control system

Details Seismic vibrator control system Seismic vibrator control system

1976-04-19

1977-09-20

Wilbur, Maynard R.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181142, 181401, 340 155TC, G01V 104

Patent

active

040490777

ABSTRACT:
This invention is a control system for a hydraulic vibrator that permits the injection into the ground of seismic signals having pseudo-random code patterns or other broad band signals. Feedback for controlling vibrator operation is taken from the coupling plate. At low frequencies, the feedback is proportional to coupling plate position and at higher frequencies, the feedback is proportional to the coupling plate velocity.

REFERENCES:
patent: 3208550 (1962-12-01), Castanet et al.
patent: 3219971 (1915-11-01), Cole
patent: 3331239 (1967-07-01), Larsen et al.
patent: 3363720 (1966-11-01), Mifsud et al.
patent: 3578102 (1971-03-01), Ross et al.
patent: 3698508 (1972-10-01), Landrum, Jr.
patent: 3795286 (1974-03-01), Meyer
patent: 3807525 (1974-04-01), Platt
patent: 3854118 (1974-12-01), Pelton
patent: 3863202 (1975-01-01), Landrum, Jr.
patent: 3881167 (1975-04-01), Pelton et al.

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