Seismic vibrator control system

Patent · Tue Jan 08 00:00:00 EST 1985

OSTI ID:5658099

Thomas, B J; Heath, B J

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.

• Assignee: Conoco Inc.
• Patent Number(s): US 4493067
• OSTI ID: 5658099
• Resource Relation: Patent File Date: Filed date 13 Apr 1981; Other Information: PAT-APPL-253207
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
SEISMIC SOURCES
COMPUTERIZED CONTROL SYSTEMS
AMPLITUDES
CONTROL EQUIPMENT
DIGITAL-TO-ANALOG CONVERTERS
FREQUENCY CONTROL
MEMORY DEVICES
MICROPROCESSORS
REAL TIME SYSTEMS
SEISMIC WAVES
SIGNALS
TIME DEPENDENCE
COMPUTERS
CONTROL
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
MICROELECTRONIC CIRCUITS
440400* - Well Logging Instrumentation