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7632349 |
Silicon wafer surface defect evaluation method
There is provided a silicon wafer surface defect evaluation method capable of readily detecting a region where small crystal defects exist, the evaluation method comprising: a rapid heat treatment...
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7605590 |
Digital locating system and device for underground object detection
An underground digital locating system includes a receiver capable of acquiring a signal produced by an underground object and displaying a digital representation of the orientation of underground...
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7603158 |
Current density impedance imaging (CDII)
A method for non-invasive mapping (imaging) of the electrical impedance of an object. The present invention provides a method, current density impedance imaging (CDII) which produces an impedance...
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7586307 |
Locating arrangement and method using boring tool and cable locating signals
An arrangement and an associated method are described in which a boring tool is moved through the ground within a given region along a path in which region a cable is buried. The boring tool and...
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7586308 |
Phase shifted locating signal as compensation for a coupling configuration phase shift in discriminating a false locating signal
When a first cable is driven at a locating signal frequency to emit a locating signal, the locating signal can be coupled to a second cable to cause the second cable to generate a false locating...
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7579839 |
Metal detector
A real time electronic metal detector including a magnetic transmitter ( 1 ) and a receiver ( 3 ), wherein the receiver includes approximate sine-wave weighted synchronous demodulation and a...
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7570060 |
Tracking positions of personnel, vehicles, and inanimate objects
A device rotates at least one static magnetic field about an axis, producing a rotating magnetic dipole field, and is movable in relation to the surface of the ground. The field is periodically...
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7567875 |
Enhanced sonde recognition
A detector for locating a sonde is comprised of a plurality of antennas, a corresponding number of signal isolator modules 1 and a geometrical evaluation module. The magnetic signal generated by...
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7563054 |
Marking tape with passive resonant circuits and methods of use
A marking tape comprising at least one resonant circuit, each resonant circuit comprising an inductive coil and a capacitor, forming a resonant circuit of a selected frequency, comprises inductive...
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7562722 |
Method and apparatus for establishing the position of a sonde in a region using a single detector
An apparatus and method are described for tracking the position, orientation and/or guiding a sonde as it moves through the ground in a region. The sonde transmits an electromagnetic field received...
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7557559 |
Compact line illuminator for locating buried pipes and cables
A compact line illuminator for applying an oscillating signal to buried or otherwise inaccessible pipes, cables and conductors so that their location can be traced by detecting an electromagnetic...
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7548065 |
Skin depth compensation for an in-ground transmitter
In a system in which a transmitter is moved through the ground in a region which includes an electrical conductivity characteristic and the transmitter transmits a locating signal for reception,...
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7535407 |
Apparatus using continuous-wave radiation for detecting and locating targets hidden behind a surface
Continuous-wave radiation is used to detect a target hidden behind a surface. In an embodiment, a transmitter directs a beam of continuous-wave microwave radiation from a transmitting location, and...
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7528606 |
Coupled nonlinear sensor system for sensing a time-dependent target signal and method of assembling the system
A coupled non-linear sensor system is provided for sensing a non-sinusoidal time-dependent target signal. The system comprises an odd number, other than one, of interconnected oscillatory sensors...
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7518374 |
Reconfigurable portable locator employing multiple sensor array having flexible nested orthogonal antennas
A portable locator for detecting a buried object characterized by an electromagnetic (EM) field emission employing three-dimensional (3D) sensor arrays each having three substantially-identical EM...
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7498816 |
Omnidirectional sonde and line locator
At least one antenna array including three mutually orthogonal antennas each sharing a common center point senses an electromagnetic signal emitted by a buried object such as a utility line, pipe...
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7495445 |
Flux orientation locating in a drilling system
An above ground locator includes an apparatus for determining the strength of the locating signal at a selected point relative to the boring tool. The apparatus includes an antenna arrangement...
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7474102 |
Rectangular-wave transmitting metal detector
An electronic metal detector having transmit electronics includes switching electronics arranged and adapted to generate a transmit signal. The transmit electronics includes at least two power...
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7466134 |
Method and apparatus for locating underground cast iron pipe joints
An apparatus for locating underground cast iron pipe joints having an electrically driven resonant coil generating an alternating magnetic field and two resonant sensor coils disposed within the...
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7463034 |
Ground control unit for cable locating
A system for selectively grounding each of a plurality of short-haul buried utility conveyances coupled to a common long-haul buried utility conveyance to enable a conveyance locating signal...
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7423422 |
Metal detector
A memory ( 33 ) is provided for storing in advance data of signals supplied from a detector unit ( 26 ) when a plurality of metallic foreign matter samples differing in magnitude passes an...
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7411399 |
Electromagnetic survey system with multiple sources
Multiple sources are provided for a transmitter cable for use in electromagnetic surveying. The transmitter cable includes a dipole antenna comprising a pair of spaced apart electrodes mounted on...
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7403012 |
Detector for detecting a buried current carrying conductor using electromagnetic radiation of predetermined frequencies
A detector for detecting a buried current carrying conductor includes a digital signal processor, magnetic sensors, and a power supply unit. The power supply unit is a switched mode power supply...
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7403014 |
Tracking the positional relationship between a boring tool and one or more buried lines using a composite magnetic signal
A boring tool is moved through the ground in a region which includes at least one electrically conductive in-ground line and which is subject to static magnetic fields including the magnetic field...
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7403013 |
Boring tool tracking/guiding system and method with unconstrained target location geometry
Tracking a boring tool is performed within an underground region using a locating signal. The boring tool is moved through the ground during a series of distance movements such that potential...
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7397366 |
Method and apparatus for locating a person who has been buried alive
A search apparatus and related method facilitate the final stage of a search for a buried person carrying a transmitter. When the searcher is in the close vicinity of the buried transmitter, the...
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7397249 |
Apparatus for distinguishing false signals in cable locating
Discriminating between a cable locating signal and a false cable locating signal is described. A reference signal, which contains a locating signal frequency impressed on it, is transmitted in a...
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7391217 |
Metal detection methods and apparatus wherein a numeric representation of the sense signal and a noise contribution to the sense signal are produced
Metal detectors include a sense coil coupled to an analog to digital converter that produces a numeric representation of an electrical signal associated with a conductive object situated in an...
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7391216 |
Locating arrangement and method using boring tool and cable locating signals
An arrangement and an associated method are described in which a boring tool is moved through the ground within a given region along a path in which region a cable is buried. The boring tool and...
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7382266 |
Surface tracker
A surface tracker includes a tubular marker body having an interior electronic marker and a visual indicator attached to an upper end of the marker body which extends away from the marker body....
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7372276 |
Digital locating system and device for underground object detection
An underground digital locating system includes a receiver capable of acquiring a signal produced by an underground object and displaying a digital representation of the orientation of underground...
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7372247 |
Apparatus and method for locating and marking an underground utility
An apparatus and method to locate and mark the surface position of an underground utility while maneuvering along the path of the utility. The apparatus uses an underground utility detector that...
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7367269 |
Blast movement monitor and method for determining the movement of a blast movement monitor and associated rock as a result of blasting operations
A method for measuring the movement of boundaries between different portions of a heterogeneous rock body is disclosed. The method comprises placing a plurality of blast movement monitors 109 in...
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7362260 |
Method of using continuous-wave radiation for detecting and locating targets hidden behind a surface
Continuous-wave radiation is used to detect a target hidden behind a surface. In an embodiment, a transmitter directs a beam of continuous-wave microwave radiation from a transmitting location, and...
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7358738 |
Method and apparatus for digital detection of electronic markers using frequency adaptation
An electronic marker locator with a digital architecture for providing accurate and consistent estimation of the signal strength is presented. The marker locator includes a Digital Phase-Locked...
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7355409 |
Systems and methods useful for detecting presence and / or location of various materials
The present invention provides systems and methods which can be employed to locate or detect presence of various materials, including nonferrous metals. These systems include new and useful...
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7355410 |
Handheld scanning subsurface detector
A handheld scanning subsurface detector ( 1 ) includes a detector module ( 2 ) and a computing unit ( 3 ) located in handheld housing ( 5 ), a guide ( 7 ) for guiding the detector module ( 2 ) at a...
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7356421 |
Precise location of buried metallic pipes and cables in the presence of signal distortion
A new approach for locating an underground line described herein remains accurate in the face of bleedover by including both amplitude and phase from at least two magnetic field strength sensors in...
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7342399 |
Magnetic anomaly sensing-based system for tracking a moving magnetic target
A system for tracking a moving magnetic target uses a magnetic anomaly sensing system to continually determine magnetic gradient tensors associated with the target and converts the magnetic...
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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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7339379 |
Method of and apparatus for determining if a buried current carrying conductor is buried above predetermined minimum depth
A detector 1 for detecting a current carrying conductor has a pair of vertically spaced antennae 3, 5 to detect the magnetic radiation produced by a current carrying conductor as a result of...
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7336078 |
Multi-sensor mapping omnidirectional sonde and line locators
Portable locators are disclosed for finding and mapping buried objects such as utilities. A articulatable antenna node configuration and the use of Doppler radar and GPS navigation are also disclosed.
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7332901 |
Locator with apparent depth indication
A human-portable utility locator system for locating and tracing a buried utility line characterized by an electromagnetic field emission. The locator may include a horizontal spaced sensor pair...
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7327144 |
Multi-frequency boring tool locating system and method
Arrangements, apparatus and associated methods are described for use in a multi-frequency boring tool locating system. The boring tool includes a transmitter for transmitting a locating signal at...
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7308911 |
Electronically detectable high-pressure hose and method of determining the location of the hose
A hose is provided having at least one layer defining a tubular body with a length and an electrically conductive lead joined to the tubular body and extending along the length of the tubular body....
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7310586 |
Metal detector with data transfer
A metal detector adapted to generate a transmit search signal and to receive a receive search signal, and to analyse such received search signal, wherein the detector is adapted to allow a...
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7310060 |
Multi-mode landmine detector
An multi-mode target detection system includes a ground penetrating metal detector and a ground penetrating radar detector permitting operation of the system in a variety of target detection modes....
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7304479 |
Flux plane locating in an underground drilling system
A portable locator and method for establishing the location of the cable line in a region which includes at least one generally straight electrically conductive cable line extending across the...
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7298126 |
Sondes for locating underground pipes and conduits
A sonde includes an elongate flexible ferromagnetic core and a coil surrounds an intermediate segment of the core. A housing surrounds and supports the coil. An electronic drive circuit is mounted...
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7285953 |
Device for detecting interfering pieces in material to be conveyed
A device for producing a detection signal when interfering, preferably metallic conductive pieces occur in an at least largely non-conductive conveyor stream. An alternating electromagnetic field...
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