Patent
Positioning, detection and communication system and method
Dolgin Benjamin P,Michael Shore,Steven A. Cotten,Craig E. Matter,Kenneth D. Kuck,Luis B. Giraldo,John T. Ishibashi +6 more
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TLDR
A positioning, communication, and detection system designed to provide a three dimensional location of an object, navigation tools, and bidirectional surface-to-subsurface communications, and methods of using the system is described in this article.Abstract:
A positioning, communication, and detection system designed to provide a three dimensional location of an object, navigation tools, and bidirectional surface-to-subsurface communications, and methods of using the system. The system can include one or multiple transmitters comprising electromagnetic beacons, software defined radio receivers with an associated processing unit and data acquisition system, and magnetic antennas. The system may use theoretical calculations, scale model testing, signal processing, and sensor data.read more
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References
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Patent
Three dimensional tracking system employing a rotating field
TL;DR: In this paper, the position and orientation of a helmet worn by a crew member in a vehicle including a generator, associated with the vehicle, was determined by using a rotating magnetic and electric field of fixed strength, orientation and frequency within at least a portion of the vehicle.
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Tracking positions of personnel, vehicles, and inanimate objects
TL;DR: In this article, a static magnetic field about an axis, producing a rotating magnetic dipole field, and is movable in relation to the surface of the ground is monitored using the output.
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Conductivity method and apparatus for measuring strata resistivity adjacent a borehole
TL;DR: In this article, a method and apparatus for measuring current resulting from a magnetic field source (i.e., a transmitter) positioned on a drill collar is described, where a plurality of current detectors are carried on the surface of the drill collar in an insulated relationship.
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Subsurface electromagnetic measurements using cross-magnetic dipoles
TL;DR: In this article, the downhole tools adapted for subsurface disposal are used to dispose of downhole sensor assemblies including transmitter and receiver antennas to respectively transmit or receive electromagnetic energy, and the receiver is disposed at a distance less than six inches from the transmitter on the sensor body.
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Radar plant and measurement technique for determination of the orientation and the depth of buried objects
Ole Gregersen,Ole Kiel Jensen +1 more
TL;DR: In this paper, a plant for the generation of information indicative of the depth and orientation of an object positioned below the surface of the ground is adapted to use electromagnetic radiation emitted from and received by an antenna system associated with the plant.