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| Number | Title | Issue Date |
| 7570061 | Cantilever control device A cantilever control device is provided that can prevent, in an atomic force microscope, self-excited oscillation of a cantilever from stopping and prevent a probe of the cantilever from coming into contact with a measurement object. In the atomic force microscope, ... | 08/04/2009 |
| 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 alternating magnetic field, each of the resonant sensor coils having an... | 12/16/2008 |
| 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 search enters a point-localization phase where the apparatus displays a... | 07/08/2008 |
| 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 the measurement set. A numerical optimization step is introduced to ... | 04/08/2008 |
| 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. The system includes a control section having a selection device for ... | 12/18/2007 |
| 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 selection of operating parameters for each of these functions, said selection... | 12/18/2007 |
| 7285958 | 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 Loop (DPLL) structure. The electronic marker locator transmits known and... | 10/23/2007 |
| 7281432 | Displacement sensor with an excitation coil and a detection coil To be able to detect a displacement amount of a moving object by a resolution of from micrometer to nanometer by a simple structure. An excitation coil 23 and a detection coil 25 are arranged to align and a magnetic body probe 27 in a con... | 10/16/2007 |
| 7221136 | 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 in the housing for supplying the coil with an electric signal that wi... | 05/22/2007 |
| 7176691 | Switched coil receiver antenna for metal detector A pulse induction metal detector includes a pulse transmitter coil for generating and transmitting a first electromagnetic signal and a receiver coil for detecting and amplifying a second electromagnetic signal emitted by a nearby metal target due to eddy currents g... | 02/13/2007 |
| 7173411 | Inductive proximity sensor using coil time constant for temperature compensation Systems and methods are disclosed that facilitate determining coil temperature in a proximity sensor, such as an extended range inductive proximity sensor. Voltage measurements can be taken before, and during, damped oscillatory decay of a voltage in a resonant circ... | 02/06/2007 |
| 7173410 | Proximity sensor combining impedance, frequency and decay constant information Systems and methods are disclosed that compensate for temperature drift in a proximity sensor, such as an extended range inductive proximity sensor. Voltage measurement can be taken before, and during damped oscillatory decay of a voltage in a resonant circuit in th... | 02/06/2007 |
| 7155189 | AM receiver An AM receiver with at least one IF filter with a fixed IF bandwidth comprises at least one downconversion stage (3, 4, 5) to shift the signal input thereto into an IF range (IF1) having a variable oscillation frequency (fLO1) which is adjus... | 12/26/2006 |
| 7078906 | Simultaneous time-domain and frequency-domain metal detector A metal detector capable of operating in both a time-domain mode and a frequency-domain mode includes a transmitter component and a receiver component. The transmitter component includes a transmitter coil that can receive both an AC and DC current source for freque... | 07/18/2006 |
| 7075304 | Variable damping induction coil for metal detection A pulse inductive metal detector that includes a variable resistor for controlling coil characteristics for both transmitter and receiver modes of operation. A coil coupled with an electronic switch is charged with current from the power source in a transmitter mode... | 07/11/2006 |
| 7062414 | Method and apparatus for digital detection of electromagnetic signal strength and signal direction in metallic pipes and cables A new digital architecture for metallic pipe and cable locators, providing accurate estimation of the fundamental locate parameters, electromagnetic signal strength and signal direction, and utilizing a nested Digital Phase-Locked Loop (DPLL) structure is disclosed.... | 06/13/2006 |
| 7061234 | Modular proximity sensor A preamplifier portion 2 is arranged between a head portion 1 containing a detecting coil and an amplifier portion 3, wherein a detecting circuit and a controlling circuit and the like are arranged. The preamplifier portion 2 is connected... | 06/13/2006 |
| 7027318 | Method and system for adjusting offset voltage A method and apparatus are disclosed for adjusting the offset voltage of a circuit. In one embodiment, the method comprises: supplying reference and supply voltages to the circuit, controlling a voltage across a memory element to be approximately equal to the refere... | 04/11/2006 |
| 7026803 | Hand-held, ergonomic capacitive amplifier and hand-held tone generator to be used in conjunction with the capacitive amplifier A capacitive amplifier and tone generator detect and amplify an electrical tone conducted by one of a group of wires or a pair of wires in order to identify and trace a particular wire or pair of wires. The capacitive amplifier has a probe for being placed adjacent ... | 04/11/2006 |
| 7026787 | Method and device for determining the starting capability of a vehicle A method for determining the ability of a vehicle to start, in order to detect the operational capability of a battery, in particular of a vehicle battery, in a particularly simple and reliable way. Current values and voltage values of the battery are sensed during ... | 04/11/2006 |
| 7012434 | Method for determining the amount of charge which can be drawn from a storage battery and monitoring device A method for determining the amount of charge which can be drawn from a storage battery and a monitoring device are provided that measure at least one of battery currents and battery voltages at at least two points in time before or during a rise phase and during or... | 03/14/2006 |
| 7010416 | Systems and methods for resetting vehicle emission system error indicators A method of resetting an active emissions system error indictor associated with a vehicle. The method comprises performing a first requesting step and a second requesting step until the active emissions system error indicator resets in response to the first or secon... | 03/07/2006 |
| 6970087 | Device and method of detecting metal objects A metal detecting device for the detection of a metal object concealed in shoe or on a leg of a subject, including: a housing with a platform having an upper surface with indication areas thereon for the correct positioning of each... | 11/29/2005 |
| 6967574 | Multi-mode electromagnetic target discriminator sensor system and method of operation thereof A multi-mode electromagnetic target discrimination sensor system for transmitting an electromagnetic signal and receiving a reflected signal from at least one target is disclosed having a variable inductance antenna having a variable inductance transmitter and a var... | 11/22/2005 |
| 6958603 | Method for detecting metallic foreign matter and system for detecting metallic foreign matter A metallic contaminant detecting method and apparatus according to the present invention detect metallic contaminants mixed in objects under inspection, such as food products, pharmaceuticals, and materials for industrial use, which are wrapped in electrically condu... | 10/25/2005 |
| 6952101 | Method for determining direction to a target formation from a wellbore by analyzing multi-component electromagnetic induction signals A method is disclosed for determining a direction of a target formation with respect to an instrument in a wellbore. The target has an electrical conductivity different than earth formations surrounding the wellbore. The method includes inducing time varying electro... | 10/04/2005 |
| 6911823 | Metal detector employing static discrimination A metal detector employing static discrimination. Within the scope of the invention is a two-frequency method and apparatus for discriminating between metal objects and ground. Also within the scope of the invention is a three-frequency method and apparatus for disc... | 06/28/2005 |
| 6845936 | Stable heli-borne vector platform for performing geophysical measurements A stable heli-borne vector platform capable of accepting a range of different sensors or instruments, particularly, but not exclusively, for the mapping and exploration of mountainous regions is described. The platform enables the arrangement of the sensors in three... | 01/25/2005 |
| 6529007 | Temperature compensation for ground piercing metal detector A hand tool has a ground-piercing probe, which is manually insertable in the soil. The probe has a chamber in which an inductor is positioned and connected to metal detection circuitry. A pulse generator applies current pulses to an inductor for inducing ... | 03/04/2003 |
| 6472875 | Method for detecting a motor vehicle battery failure A process for the detection of a defect of an automotive vehicle battery includes analyzing the time dependence of the discharge voltage across the terminals of the battery. This process has the steps of measuring at least two successive values of the dis... | 10/29/2002 |
| 6456079 | Circuit for detecting the metal type of a metal target object A hand tool has a handgrip attached to a ground-piercing probe, which is manually insertable in the soil. The probe has a chamber in which at least one inductor is positioned and connected to metal detection circuitry. The preferred circuitry has a pulse ... | 09/24/2002 |
| 6452396 | Method for detecting the metal type of a buried metal target A hand tool has a handgrip attached to a ground-piercing probe, which is manually insertable in the soil. The probe has a chamber in which at least one inductor is positioned and connected to metal detection circuitry. The preferred circuitry has a pulse ... | 09/17/2002 |
| 6452397 | Ground piercing metal detector method for detecting the location of a buried metal object A hand tool has a handgrip attached to a ground-piercing probe, which is manually insertable in the soil. The probe has a chamber in which at least one inductor is positioned and connected to metal detection circuitry. The preferred circuitry has a pulse ... | 09/17/2002 |
| 6326790 | Ground piercing metal detector having range, bearing and metal-type discrimination A hand tool has a handgrip attached to a ground-piercing probe, which is manually insertable in the soil. The probe has a chamber in which at least one inductor is positioned and connected to metal detection circuitry. The preferred circuitry has a pulse ... | 12/04/2001 |
| 6304083 | Magnetic field sensor with colossal magneto-resistive material contained within the coil of an oscillator Sensors, systems and methods for measuring magnetic field strengths in both AC and DC magnetic fields by using CMR material in tunable, radio-frequency LC oscillators are disclosed.... | 10/16/2001 |
| 6211672 | Human appendage mounted metal detector A metal detector that is to be attached to a human appendage and preferably the wrist and hand of a human. A metal detector includes a housing which is to be worn strictly by the human hand or the hand and the wrist. One version of the metal detector woul... | 04/03/2001 |
| 6191580 | Configurable inductive proximity detector to detect ferrous or non-ferrous metal objects An oscillator 12 outputs a constant frequency as a metal object is brought close and this frequency forces oscillation of an oscillating circuit 11 which is sensitive to this metal object, at a level significantly below the critical natural frequency of t... | 02/20/2001 |
| 5986549 | Position and movement reasonant sensor An object sensing system (10) employs a resonant sensor (20) that receives drive energy coupled from an oscillator (12) operating at a frequency equal or close to the resonant frequency of the resonant sensor. The resonant sensor preferably includes an pl... | 11/16/1999 |
| 5959451 | Metal detector with vibrating tactile indicator mounted within a compact housing A compact hand-held metal detector that detects small ferrous and non-ferrous metal objects, that has a detection pattern in three planes, and that includes a plurality of detection alarm indications including visual, audio, and tactile detection alarm in... | 09/28/1999 |
| 5949293 | Integrated circuit for measuring the distance An integrated circuit for measuring the distance houses an oscillator in a package. Further, a plane inductor is provided on the surface of the package housing the oscillator. The plane inductor is connected to the oscillator so as to specify a frequency ... | 09/07/1999 |
