Sign bit optical-electrical geophone

Details Sign bit optical-electrical geophone Sign bit optical-electrical geophone

G - Physics

01

D

349/58

G01D 5/34 (2006.01) G01H 9/00 (2006.01) G01V 1/18 (2006.01)

Patent

CA 1259124

ABSTRACT OF THE DISCLOSURE An optical-electrical geophone which generates a binary signal is described. The geophone utilizes an optical fiber for the return transmission of a light source in the geophone. The geophone contains a light chopping means which oscillates in response to vibrations imparted into a geologic formation. As the chopping means such as a baffle or a tubular member vibrates, it chops the light signal and creates an on/off light pattern, i.e., binary signal. The light passing through a slit in the baffle or tubular member is returned to the seismic vehicle through an optical fiber for further processing. The optical-electrical geophone creates a binary signal directly without the use of clipping electronics and magnets or coils used in conventional geophones.

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