Apparatus for obtaining seismic data

Details Apparatus for obtaining seismic data Apparatus for obtaining seismic data

1976-07-19

1979-01-23

Bentley, Stephen C.

Communications: electrical

Selective

Having electron beam device

340 155GC, 340 155MC, G01V 100

Patent

active

041363264

ABSTRACT:
Apparatus for obtaining seismic data or information in the field comprises electrical communication paths established between seismic detectors distributed over the ground, and a digital seismic data recorder. Each of the paths comprises a pre-amplifier, various filters, a regulable-gain amplifier, and finally a digitizer, or the paths have these elements at least partly in common. The digitizer operates by carrying out random weighing; it comprises a pseudo-random generator and at least part of the contents of this generator is loaded in parallel into a register. The pseudo-random number thus obtained is converted into an analogue signal and is used for weighing a sample of the seismic signal in a comparator. This gives a single bit each time, which is then recorded in the recorder.

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