Seismic vibrator hold-down weight monitor/controller

Details Seismic vibrator hold-down weight monitor/controller Seismic vibrator hold-down weight monitor/controller

1988-12-22

1989-08-08

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Vibrator-type transmitter

181114, G01V 104

Patent

active

048559679

ABSTRACT:
The disclosure relates to a seismic vibrator having an airbag isolator, a transducer for monitoring the instantaneous air pressure within the airbags, a summer to add the pressures within each air bag and a calibrated weighting network to convert the composite pressure for display as holdown weight on a meter and for comparing the measured holdown against a preset threshold that is used to enable or disable sweep generation or operation of an inducer. The system also includes structure for comparing the measured holdown against a preset threshold that is used as a feedback signal to the lift system and for providing a signal proportional to holdown weight to the sweep generator for use as a feedback signal to modify the amplitude of the force generated by the actuator.

REFERENCES:
patent: Re25401 (1963-06-01), Clynch
patent: 4011923 (1977-03-01), Talke et al.
patent: 4063613 (1977-12-01), Silverman
patent: 4116300 (1978-09-01), Stone
patent: 4519053 (1985-05-01), Bedenbender et al.

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