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AssigneeGeophysical Systems Corporation
InventorsDaniel Silverman, J. Robert Fort
Estimating the term…
In a seismic system in which signals from a plurality of geophones are carried by pairs of conductors to each of a plurality of array terminals, where the geophone signals are converted to square wave signals, and on successive commands, the square wave signals are sampled, the samples are temporarily stored, and are then transmitted to storage means, the improved method of transmitting the geophone signals from the geophones to the array terminals, comprising; amplifying and square waving the geophone signals at the geophones, and transmitting the square wave signals to the array terminals. Included also are steps to modulate carrier signals in synchronism with the square wave signals to form bursts of carrier signals which are transmitted to the array terminals, where the bursts of carrier signals are detected and the square wave signals are regenerated, and sampled.
In a 1 bit digital geophone signal acquisition and transmission system having a plurality of array terminals, each of which receives a plurality of analog signals from a plurality of geophones connected respectively to a plurality of different pairs of conductors, and in said array terminals of said system said plurality of analog signals are amplified at constant gain and on command are sampled and digitized to 1 bit, the improvement in the method of transmission of said plurality of analog geophone signals from said geophones to said array terminals, comprising the steps of:
In a 1 bit digital geophone signal acquisition system having a plurality of array terminals, each of which receives analog signals from a plurality of geophones connected respectively to a plurality of pairs of conductors, and in the array terminals of said system said analog signals are zero crossing coded and on command are sampled and digitized to 1 bit, the improvement in the method of transmission of said analog geophone signals from said geophones to said array terminals comprising the steps of;
In a 1 bit digital geophone signal acquisition system having a plurality of array terminals, each of which receives analog signals from a plurality of geophones connected respectively to a plurality of pairs of conductors, and in the array terminals of said system said analog signals are zero crossing coded and on command sampled and digitized to 1 bit, the improvement in the method of transmission of said analog geophone signals from said geophones to said array terminals for minimum noise contamination comprising the steps of:
Dependencies are inferred from the claim text.