Variable gap roll along switching

Details Variable gap roll along switching Variable gap roll along switching

1979-07-09

1981-07-21

Birmiel, Howard A.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 59, 367 63, 367 78, 370113, 307154, G01V 122

Patent

active

042802016

ABSTRACT:
A seismic prospecting roll along switching system using a relatively small number of switches to provide roll along prospecting while also providing variable gapping with minimum loss of active channels. In a simple form two sets of switches are provided with each set having one switch provided for each geophone input and with switch outputs connected in pairs, appropriately selected, to the inputs of signal processing channels. The two sets of switches are connected to the processing channels in a skewed or staggered manner with the amount of skew corresponding to a selectable gap. A controller is provided for electronically closing the appropriate switches from each set in accordance with the desired gap. Additional switch sets may be employed to provide additional selectable gaps while maintaining complete utilization of processing channels.

REFERENCES:
patent: 3240286 (1966-03-01), Musgrave

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