Marine acoustic pulse train signal generator

Details Marine acoustic pulse train signal generator Marine acoustic pulse train signal generator

1976-01-08

1977-09-20

Buczinski, S. C.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

74 56, 60542, 181113, 181119, 340 7R, G01V 104

Patent

active

040490785

ABSTRACT:
An apparatus for generating a series of seismic acoustic pulses in a body of water. The series is characterized by having continuously-variable, non-repetitive time intervals between successive pulses during a continuous seismic recording. The preferred generator is an air gun comprising a variable-speed motor with a rotating cam for actuating a sleeve valve which alternately opens and closes exhaust ports in a high-pressure chamber. As the valve repeatedly opens, jets of high-pressure air are impulsively expelled into the surrounding water, thereby generating an underwater acoustic pulse train.

REFERENCES:
patent: 1310574 (1919-07-01), Kollock et al.
patent: 3322232 (1967-05-01), Chalmers et al.
patent: 3437170 (1969-04-01), Brock et al.
patent: 3638752 (1972-01-01), Wakefield
patent: 3750097 (1973-07-01), Havlik et al.

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