Low-frequency receiver coil suspension system
AssigneeCgg Services SAS
InventorPhilip Miles
Life of this patent
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Abstract
An electromagnetic (EM) receiver system for measuring EM signals. The EM receiver system includes a platform; a coil for measuring EM signals; and first to third suspension mechanisms located between the platform and the coil so that the coil oscillates relative to the platform, and the first to third suspension mechanisms attenuate motion induced noise introduced by towing the receiver system above ground.
Claims20
An electromagnetic (EM) receiver system for measuring EM signals, the EM receiver system comprising:
- a coil assembly;
- a receiver coil fixedly attached to the coil assembly and configured to measure an EM signal;
- a spindle located within the coil assembly;
- a first elastic member connecting the spindle to the coil assembly, the first elastic member allowing the coil assembly to oscillate relative to the spindle;
- an inner cage configured to house the coil assembly, the spindle being linked to the inner cage through a second elastic member;
- and
- an outer cage configured to house the inner cage, the inner cage being linked to the outer cage through a third elastic member,
- wherein each of the first to third elastic members is configured to allow the coil assembly to oscillate relative to the outer cage and each elastic member damps a motion of the receiver system when towed during an EM survey.
An electromagnetic (EM) receiver system for measuring EM signals, the EM receiver system comprising:
- a platform;
- a coil for measuring EM signals;
- a coil support to which the coil is fixedly attached;
- and
- first to third suspension mechanisms located between the platform and the coil so that the coil oscillates relative to the platform, and the first to third suspension mechanisms attenuate motion induced noise introduced by towing the receiver system above ground,
- wherein the first suspension mechanism is located within the coil support and the second and third mechanisms are located outside the coil support.
A method for attenuating motion induced noise in an electromagnetic (EM) receiver system for measuring EM signals, the method comprising:
- providing a platform;
- and
- fixedly attaching a coil for measuring EM signals to a coil support and attaching the coil support to the platform with first to third suspension mechanisms,
- wherein the coil oscillates relative to the platform and the first to third suspension mechanisms attenuate the motion induced noise introduced by towing the receiver system above ground,
- wherein the first suspension mechanism is located within the coil support and the second and third mechanisms are located outside the coil support.
Dependencies are inferred from the claim text.