Seismic vibrator control system

Details Seismic vibrator control system Seismic vibrator control system

1981-04-13

1985-01-08

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Signal transducers

Vibrator-type transmitter

181107, G01V 1155, G01V 1143

Patent

active

044930674

ABSTRACT:
A method and apparatus for construction of a seismic vibrator control signal which comprises manually selecting sweep parameter data values for starting frequency, ending frequency, sweep time and taper time and inputting to an addressable storage medium. Thereafter, determining for each of a plurality of sample points throughout the sweep time, the sweep rate of change per sample point and the accumulated frequency value per sample point, and outputting in real time the digital sweep values for each successive sample point, and subsequently converting and smoothing said successive digital sweep values to an analog control signal of the selected frequency, relative amplitude and duration of sweep length.

REFERENCES:
patent: 3440599 (1969-04-01), Waters et al.
patent: 3460648 (1969-08-01), Brown et al.
patent: 3739870 (1973-06-01), Pelton et al.
patent: 3886493 (1975-05-01), Fair
patent: 4168485 (1979-09-01), Payton et al.

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