Cop switch-position encoder, method and apparatus

Details Cop switch-position encoder, method and apparatus Cop switch-position encoder, method and apparatus

1981-08-20

1984-11-20

Wilbur, Maynard R.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 59, 34082503, G01C 1738, G01K 1500

Patent

active

044843143

ABSTRACT:
A pulse is applied sequentially to each geophone input line to the stator of a CDP switch. A pulse detector is connected to the first output line of the CDP Switch cursor. A counter counts the number of pulses applied to inactive input lines before a pulse is detected by the pulse detector. The pulse count is the geophone group number of the first active geophone group.

REFERENCES:
patent: 3618000 (1971-11-01), Carruth, Jr.
patent: 3638176 (1972-01-01), White
patent: 3878463 (1975-04-01), Lanigan
patent: 4281403 (1981-07-01), Siems et al.

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