Electromagnetic seismic vibrator architecture

摘要

Aspects described herein relate to an electromagnetic seismic vibrator (EMSV) architecture that provide wide frequency range operation, ground force application with high fidelity, and low environmental impact. The EMSV architecture can include a base member that can support a force coil and mitigate electrical heating due, at least in part, to spurious currents. The EMSV architecture can include means for restricting movement of a reaction member included in the EMSV architecture relative to the base member. Such means can permit mitigation of damage of the EMSV architecture in scenarios in which control of the EMSV architecture may fail.

主权项

1. An apparatus for excitation of a seismic platform, the apparatus comprising:
a reaction member; a first plurality of electrical conductor rings (ECRs) in communication with at least one source of electric current, the first plurality of ECRs being coupled to a portion of the reaction member, wherein the first plurality of ECRs is configured to transport a selectable first electric current effective to create a magnetic field of a desired strength; an annular base member having an upright upper end portion having an inner annular surface and an outer annular surface, wherein the reaction member is operatively coupled to the base member for selective axial movement about an equilibrium position relative to the annular base member; and a second plurality of ECRs in communication with the at least one source of electric current, the second plurality of ECRs being coupled to at least a portion of the inner annular surface or the outer annular surface of the upper end portion of the annular base member, wherein the second plurality of ECRs is configured to transport a selectable second electric current effective to operatively interact with the magnetic field generated by the first plurality of ECRs to selectively displace the reaction member from the equilibrium position, and wherein at least a portion of the second plurality of ECRs are transposed in a Roebel array.