Receiver coil assembly with air and ferromagnetic cored sensors for geophysical surveying
First Claim
1. A receiver coil assembly for towing by an aircraft for performing geophysical surveys, comprising a semi-rigid outer shell having a nominally vertical extent which is substantially less than an horizontal extent thereof, the outer shell housing a multiturn air core receiver coil and at least one solenoid receiver coil, each receiver coil sensing changes in a different magnetic field component and having an axis at a known angle to the axis of the other receiver coil, wherein the multiturn air core receiver coil has a nominally vertical axis and the solenoid receiver coil comprises a multiturn solenoid winding with a ferromagnetic core and has a horizontal axis.
3 Assignments
0 Petitions
Accused Products
Abstract
A receiver coil assembly for performing geophysical surveys, including a hollow outer shell defining a continuous internal passage that forms a loop; a multiturn receiver air coil extending around the continuous internal passage; and a first cored coil comprising multiturn solenoid windings about a ferromagnetic core, the first cored coil having a sensing axis in a different direction than a sensing axis of the air coil.
-
Citations
23 Claims
- 1. A receiver coil assembly for towing by an aircraft for performing geophysical surveys, comprising a semi-rigid outer shell having a nominally vertical extent which is substantially less than an horizontal extent thereof, the outer shell housing a multiturn air core receiver coil and at least one solenoid receiver coil, each receiver coil sensing changes in a different magnetic field component and having an axis at a known angle to the axis of the other receiver coil, wherein the multiturn air core receiver coil has a nominally vertical axis and the solenoid receiver coil comprises a multiturn solenoid winding with a ferromagnetic core and has a horizontal axis.
-
9. A receiver coil assembly for performing geophysical surveys, comprising:
-
a hollow outer shell defining a continuous internal passage that forms a loop; a multiturn receiver air coil extending around the continuous internal passage; and a first cored coil comprising multiturn solenoid windings about a ferromagnetic core and having a sensing axis in a different direction than a sensing axis of the air coil, wherein the first cored coil is located adjacent a region of the air coil in the internal passage. - View Dependent Claims (10, 11, 12, 13, 19)
-
-
14. A receiver coil assembly for performing geophysical surveys, comprising:
-
a hollow outer shell defining a continuous internal passage that forms a loop; a multiturn receiver air coil extending around the continuous internal passage; and a first cored coil comprising multiturn solenoid windings about a ferromagnetic core and having a sensing axis in a different direction than a sensing axis of the air coil, wherein the first cored coil comprises multiple core segments positioned end to end with gaps between adjacent core segments. - View Dependent Claims (15)
-
-
16. A receiver coil assembly for performing geophysical surveys, comprising:
-
a hollow outer shell defining a continuous internal passage that forms a loop; a multiturn receiver air coil extending around the continuous internal passage; a first cored coil comprising multiturn solenoid windings about a ferromagnetic core and having a sensing axis in a different direction than a sensing axis of the air coil; and a second cored coil comprising multiturn solenoid windings about a ferromagnetic core, the second cored coil located adjacent a second region of the air coil within the internal passage and having a sensing axis in a different direction than the sensing axis of the air coil and the sensing axis of the first cored coil.
-
-
17. A receiver coil assembly for performing geophysical surveys, comprising:
-
a hollow outer shell defining a continuous internal passage that forms a loop; a multiturn receiver air coil extending around the continuous internal passage; a first cored coil comprising multiturn solenoid windings about a ferromagnetic core and having a sensing axis in a different direction than a sensing axis of the air coil; wherein the loop is a polygonal or circular loop, further comprising a second cored coil comprising multiturn solenoid windings about a ferromagnetic core, the first and second cored coil and the air coil each being maintained at known relative positions, the coils each sensing changes in a different magnetic field component of a magnetic field. - View Dependent Claims (18)
-
-
20. A receiver coil assembly for performing geophysical surveys, comprising:
a multiturn air coil receiver defining a loop; at least one cored coil receiver having a ferromagnetic core and a solenoid winding, supported immediately adjacent a region of the air coil, with a long axis of the core being substantially parallel to turns of the adjacent region of the air coil, wherein the cored coil comprises multiple core segments positioned end to end with gaps between adjacent core segments. - View Dependent Claims (21, 22, 23)
Specification