Rotating eccentric weight apparatus and method for generating co

Details Rotating eccentric weight apparatus and method for generating co Rotating eccentric weight apparatus and method for generating co

1980-02-19

1981-11-24

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 55, 367 75, 181121, G01V 136, G01V 1053, G01V 1153

Patent

active

043028250

ABSTRACT:
A rotating eccentric weight apparatus and method for generating coded shear wave signals for use in seismic exploration. The apparatus includes a rotatable eccentric and a position sensor capable of detecting each instant that the eccentric passes a particular angular position about its axis of rotation and generating a code signal for use in correlating the raw seismic data obtained. In one embodiment, the apparatus includes an outrigger shovel which transmits a sinusoidal shear wave signal generated by the rotating eccentric while the rest of the apparatus is caused to alternately decouple from and impact against the earth surface to transmit a coded train of pressure wave impulses into the earth.

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patent: 4234053 (1980-11-01), Erich
Heiland, "Geophysical Exploration", 1940, pp. 914-928, Prentice-Hall, Inc.

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