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7360124 |
Autonomous network fault detection and management system
The invention provides an autonomous geo-referenced fault data detection, storage and management system and method for transmission line network such as cable distribution networks, based on an...
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7350594 |
System and method for tracking and communicating with a boring tool
A system for determining the location of and communicating with a downhole tool assembly. A tracker assembly comprises a vertical transmitting antenna, a plurality of receiving antennas, and a...
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7342537 |
Method of and apparatus for detecting a current carrying conductor
A detector 1 for detecting a current carrying conductor determines the presence of a current carrying conductor one or more of passive or active modes. In the passive modes, the detector 1 ...
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7319387 |
GPS interface for locating device
A system for locating a position marker includes a locating device for locating the position marker, and a GPS device communicatively coupled to the locating device that provides GPS coordinate...
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7150331 |
System and method for tracking and communicating with a boring tool
A system for determining the location of and communicating with a downhole tool assembly. A tracker assembly comprises a vertical transmitting antenna, a plurality of receiving antennas, and a...
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6668944 |
Path mapping in underground boring tool applications
Specific methods are described for use in tracking and/or guiding the movement of an underground boring tool. In one aspect, an improvement is provided forming part of an arrangement for tracking...
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6650293 |
Technique for providing conveyance locating information
To locate a buried conveyance ( 10 ), electromagnetic signaling information is collected at spaced intervals along the conveyance with the aid of a locating device ( 14 ). A processor ( 21 )...
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6587079 |
Object location
A system for locating an object that produces identifying signals comprises a plurality of receiver sites arranged in an array for receiving signals from the object and for receiving a common time...
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6549012 |
Radio system for characterizing and outlining underground industrial developments and facilities
Most mines and underground facilities employ standardized construction techniques and materials. Such also cannot avoid having some above ground openings to receive utilities, fresh air, supplies,...
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6538616 |
Cubic antenna
The present invention is an antenna with a cubic core. A first conductor is wound around the core's first axis. A first dielectric layer is placed around the first conductor. A first electrical...
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6377872 |
Apparatus and method for microwave imaging and excavation of objects
A microwave imaging excavator for the detection, imaging and excavation of objects on or buried beneath the surface of the ground, such as metallic and dielectric land mines. A continuous wave...
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6285190 |
Skin depth compensation in underground boring applications
Arrangements, specific apparatus and associated methods for skin depth compensation in underground boring applications are described. Compensation for skin depth error is accomplished by measuring...
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6147480 |
Detection of metal disturbance
A method for tracking an object using energy fields, in the presence of interference due to introduction of an article responsive to the fields, in the vicinity of the object. One or more desired...
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6133869 |
Passive technique for the remote detection of buried objects
A technique is provided for passively detecting the presence and location of an underground object. A plurality of individual antennas positioned in a linear array are directed to receive fields of...
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6095260 |
System, arrangements and associated methods for tracking and/or guiding an underground boring tool
Systems and associated methods for tracking and/or guiding an underground boring tool are disclosed. Each system or arrangement uses one or more detectors to measure the intensity of an...
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6097189 |
Object locating system
A portable system is provided that is operational for determining, with three dimensional resolution, the position of a buried object or a proximately positioned object that may move in space or...
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6084412 |
Imaging objects in a dissipative medium by nearfield electromagnetic holography
A unique time-domain electromagnetic system and data processing technique which, using low frequency electromagnetic fields, can localize, in three-dimensions, the position of buried metallic...
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6075481 |
Spatial position mapping technique
The exact position of a work location (24) is mapped by the aid of at least three differential Global Positioning Satellite (GPS) receivers (12, 14, and 16) situated proximate the work location....
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6047783 |
Systems, arrangements and associated methods for tracking and/or guiding an underground boring tool
Systems and associated methods for tracking and/or guiding an underground boring tool are disclosed. Each system or arrangement uses one or more detectors to measure the intensity of an...
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6035951 |
System for tracking and/or guiding an underground boring tool
Systems and associated methods for tracking and/or guiding an underground boring tool are disclosed. Each system or arrangement uses one or more detectors to measure the intensity of an...
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6023986 |
Magnetic flux leakage inspection tool for pipelines
The present invention includes a pipeline feature or defect location system including an in-line inspection tool, an inertial navigation system (INS), control points for use with a global...
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6005518 |
Coaxial cable RF leakage detector
A cable leakage detection system to be placed in a moving vehicle for monitoring signals leaking from a coaxial cable network. AM and FM RF detectors are combined with a global positioning system,...
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5895436 |
Vehicle tracking system using cellular network
A vehicle tracking method and system using the cellular network infrastructure is disclosed. A cellular transceiver which is installed in a vehicle that requires tracking, operates on a continuous...
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5838279 |
Navigation and tracking system for shielded spaces
A navigation and/or tracking system has a base station B and a roving receiver R both of which are capable of receiving signals from a plurality of transmission sources T×1,T×2. A link signal...
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5767679 |
Geophysical prospecting apparatus utilizing pulsed electromagnetic signals and having a scanned four-cycle transmitter
Apparatus for use in a geophysical prospecting method from a vehicle for site plan pictorial representation of inclusions present in substratum soil which reflect modulated electromagnetic...
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5339088 |
Method and apparatus for measurement of direction
The invention provides a method and a corresponding instrument for measuring the direction of a remote source of radiation, the instrument comprising a support, a detector head rotatably mounted...
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5334986 |
Device for determining the position of a vehicle
A device for determining the position of a vehicle comprises a GPS (Global Positioning System) receiver (6) which supplies vehicle position data at regular intervals on the basis of data received...
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5307272 |
Minefield reconnaissance and detector system
A multi-sensor system (10) for detecting the presence of objects on the surface of the ground or buried just under the surface, such as anti-personnel or anti-tank mines or the like. A remote...
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5294937 |
Cable leakage monitoring system
A cable leakage detection system to be placed in a moving vehicle for monitoring signal leakages in a cable television plant whereby an RF detection meter is combined with a global positioning...
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4992786 |
Electrical conductor detector
Apparatus is disclosed for detecting partially submerged wires and determng the location of the above water portion thereof by injecting into the submerged portion a radio frequency electrical...
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4896116 |
Pulse radar method and apparatus for detecting an object
An object detection method and apparatus in which, in order to distinguish only an echo wave which is returned back from an object of interest, such as an underground buried object, from those echo...
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4881083 |
Homing technique for an in-ground boring device
The homing technique for directing an in-ground boring device through the ground from its particular location to a specific target point is disclosed herein. In accordance with this technique, an...
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4812850 |
Method and apparatus for combining waveforms
A method and apparatus for producing data indicative of the presence of buried objects, wherein two waveforms I(t) Q(t) are combined with two reference waveforms Ir(t) Qr(t) using filters 10, 12,...
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4806869 |
An above-ground arrangement for and method of locating a discrete in ground boring device
A technique for locating the position of a boring device within the ground with respect to a particular reference location along an above ground path directly over the intended course to be taken...
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4746867 |
Antenna assembly for microwave reflection survey equipment
An antenna assembly is provided for use in locating buried objects, particularly long thin objects such as pipes can be located, determining the position, and ascertaining the pipe direction by...
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4733242 |
Submarine detection system
A system for detecting the presence and depth of an object submerged in a medium having transmission characteristic substantially different than the atmosphere by means of receiving radiation from...
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4728897 |
Microwave reflection survey technique for determining depth and orientation of buried objects
A method and antenna assembly for transmitting into the ground polarizeable radiation whereby buried objects, and particularly long thin objects such as pipes can be located, the position...
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4721961 |
Submarine detection system
This invention relates to a system for detecting submerged objects by receiving an incident indication of electromagnetic energy and also the reflection of said energy caused by the presence of a...
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4710708 |
Method and apparatus employing received independent magnetic field components of a transmitted alternating magnetic field for determining location
The location method uses relatively low frequency electromagnetic fields, e.g., 1-1000 Hz, for determining the relative position and/or orientation of a transmitting magnetic dipole antenna by...
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4163977 |
Double loop receiver-transmitter combination
A double loop receiver used in conjunction with a transmitter broadcasting at low frequencies as a vertical magnetic dipole. The two loops are connected with their planes parallel in a resonant...
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4088998 |
System for detecting nuclear explosions
1. Apparatus for detecting underground nuclear explosions comprising antenna means located in the dielectric substance of a deep waveguide in the earth and adapted to detect low frequency...
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3975735 |
Discharge pipe line locator
An electronic locator for tracing the course of a metallic discharge line which is disposed underground. A reel means stores a length of flexible hollow cable and is operable when rotated to...
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3906504 |
Tunnel searcher location and communication equipment
A method of locating and plotting tunnels by moving a portable receiving unit in which is an orientatable coil over an area to be searched while locating a transmitting unit in the tunnel itself,...
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3900878 |
Mine rescue system
A mine rescue system for locating trapped miners following a mine disaster. A transmitting device deployed by the trapped miners transmits a signal at a frequency below 3 kHz. The phase of the...
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3662260 |
ELECTRIC FIELD MEASURING INSTRUMENT WITH PROBE FOR SENSING THREE ORTHOGONAL COMPONENTS
An instrument is disclosed which includes a probe for sensing the x, y, and orthogonal components of an electric field occurring at any given place in an environmental medium and for producing a...
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3216523 |
Seismic prospecting
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2978690 |
Expendable lead line sounder
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3718930 |
Title is not available
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