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| Number | Title | Issue Date |
| 8164325 | Displacement sensor An oscillator circuit outputs an oscillator signal with a frequency corresponding to an inductance of a displacement detector coil. An oscillation cycle measurement circuit measures a cycle of the oscillator signal output from the oscillator circuit, and outputs a s... | 04/24/2012 |
| 8008909 | Analysis and compensation circuit for an inductive displacement sensor A circuit arrangement for analysis and compensation of the signals for an inductive displacement sensor is provided. The circuit includes a first operating amplifier, a second operating amplifier and a coil for a displacement measurement, in parallel with the second... | 08/30/2011 |
| 7999533 | Magnetic sensor with compensation A sensing assembly. The sensing assembly is spaced apart from a magnet that has a magnet length, and includes a compensation module and a string of magnetic sensors that has a string length. The magnetic sensors are grouped into a plurality of magnetic sensor groups... | 08/16/2011 |
| 7902816 | Electromagnetic tracking method and apparatus for compensation of metal artifacts using modular arrays of reference sensors An electromagnetic tracking method includes generating an electromagnetic field (14) in a region of interest (16). The electromagnetic field is subject to distortion in response to a presence of metal artifacts proximate the electromagnetic field. An a... | 03/08/2011 |
| RE42159 | Circuit for compensation for time variation of temperature in an inductive sensor A sensing device includes a circuit that compensates for time and spatial changes in temperature. The circuit includes elements to correct for variation in permeability of a highly permeable core of a differential variable reluctance transducer as temperature change... | 02/22/2011 |
| 7688064 | Probe for assessment of metal distortion Apparatus for assessing field distortion includes a probe and a processor. The probe includes a mechanical fixture for placement at a location to be tested, and one or more field generators, which are attached to the mechanical fixture and are arranged to generate r... | 03/30/2010 |
| 7652468 | Correction of measured values for a magnetic localization device The invention relates to a device and a method for correction of the position (x) of a field sensor (4) measured by means of a magnetic localization device. External field distortions, such as caused for example by the rotating components (1a, | 01/26/2010 |
| 7570046 | Single sensing multiple output system A sensing system for a vehicle that includes a single sensor element and multiple outputs. An engine controller is responsive to the multiple outputs, output circuits and a supervisor circuit in the system monitors the sensor element and shared circuits. If the sens... | 08/04/2009 |
| 7548056 | Methods and apparatus for magnetic article detection Apparatus and methods for detecting passing magnetic articles using a first, True Power On State (TPOS) detector during a first time interval and transitioning to a second, running mode detector after the first time interval, when the output of the second detector i... | 06/16/2009 |
| 7541802 | Method and apparatus for evaluating a sensor signal associated with a rotating object A method for evaluating a sensor signal provided by a magnetic field sensor which is arranged at a distance from an object which is rotatable about an axis of rotation. The method includes defining an encoding pattern with a sequence of symbols, the sensor signal be... | 06/02/2009 |
| 7443160 | Position sensor A position sensor including a rotatable shaft, a first threaded member, a second threaded member, at least one magnet, and at least one magnetic flux detection device. The first threaded member is connected to the rotatable shaft. The second threaded member is threa... | 10/28/2008 |
| 7436120 | Compensation of magnetic fields For compensation of a magnetic field in an operating region a number of magnetic field sensors (S1, S2) and an arrangement of compensation coils (Hh) surrounding said operating region is used. The magnetic field is measured by at least two sensors (S | 10/14/2008 |
| 7433728 | Dynamic metal immunity by hysteresis Apparatus is provided for tracking an object in a body of a patient in the presence of an interfering article. A set of one or more radiators are adapted to generate an energy field at a fundamental frequency in a vicinity of the object. A position sensor, fixed to ... | 10/07/2008 |
| 7414533 | System for placing radio frequency identification (RFID) antennas, tags and interrogators A system and method for optimally placing radio frequency identification (RFID) antennas. The system varies the placement of RFID tag and interrogator antennas with respect to each other and a stationary object or objects. A signal generator sends a known reference ... | 08/19/2008 |
| 7401001 | Position determining A position determining system for determining a position of a rotor of a rotating motor has sensors that are coupled to the rotor. The sensors generate, in response to a rotation of the rotor, a quadrature signal that has sine and cosine components. The position det... | 07/15/2008 |
| 7400993 | Method and system for accuracy of speed and acceleration measurements on rotating machinery with a speed wheel A method and system for calculation of rotation dependent parameters in a system that senses shaft rotation of a toothed speed wheel. The method includes determining the passing edges of multiple gear teeth on a rotating speed wheel; calculating rotational speed of ... | 07/15/2008 |
| 7373271 | System and method for measuring position and orientation using distortion-compensated magnetic fields An electromagnetic tracking system (600) and a distortion compensation method (500) that utilize a lead-lag network model to compensate for position and orientation distortion caused by eddy currents formed in one or more conductive distorters (330,... | 05/13/2008 |
| 7370853 | Vibration isolating bushing with embedded angular position sensor A bushing assembly adapted for application in vehicle suspension systems includes an outer, generally cylindrical bushing member, an inner generally cylindrical bushing member arranged concentrically within the outer member. The two bushing members are interconnecte... | 05/13/2008 |
| 7360756 | Vibration isolating bushing with embedded speed/position sensor A bushing assembly adapted for application in vehicle suspension systems includes an embedded position sensor and an embedded speed sensor. ... | 04/22/2008 |
| 7358846 | Magnetic spin valve with a magnetoelectric element The present invention provides systems and method utilizing magnetoelectric materials such as Cr2O3 to construct tunneling magnetoresistence and/or giant magnetoresistence structures for memory and/or logical circuitry. An applied voltage diffe... | 04/15/2008 |
| 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 Loop (DPLL) structure. The electronic marker locator transmits known and... | 04/15/2008 |
| 7355391 | Electromechanical conversion device An electromechanical conversion device includes an electromechanical conversion unit and a cable, which has a signal wire and a ground wire for grounding the electromechanical conversion unit. The electromechanical conversion unit performs a conversion between a rel... | 04/08/2008 |
| 7354398 | Capsule-type device and capsule-type device controlling system There is provided a capsule-type device, which is provided with a power generator that generates power by receiving at least one of a time-varying electric field and a time-varying magnetic field, and a casing that surrounds the power generator. The power generator ... | 04/08/2008 |
| 7353417 | Microcontroller with synchronised analog to digital converter A microcontroller is provided, which includes a control unit (UC), at least one digital to analog converter (DAC) as a peripheral of the said control unit, and a buffer register located between the said control unit and the said converter, receiving data and a first... | 04/01/2008 |
| 7352304 | Interpolation apparatus in encoder An interpolation apparatus in an encoder includes an analog-to-digital converter for digitizing a sine wave signal and a cosine wave signal, respectively. An amplitude level detecting circuit detects each amplitude level of the digitized sine wave signal and cosine ... | 04/01/2008 |
| 7345471 | Device and method for detecting the position and the velocity of a test object A device and method for detecting the position and velocity of a test object relative to a sensor, the sensor and the test object being arranged such that they can be displaced relative to one another. In one embodiment, the sensor has a measuring coil with one or m... | 03/18/2008 |
| 7331225 | Non-contact type liquid level sensor A non-contact type liquid level sensor according to the invention has an electromagnetic shield plate mounted on a housing for blocking effects from an external magnetic field onto a magnetoelectric converting element. ... | 02/19/2008 |
| 7327587 | System and method for power conversion An ac-ac power converter system is provided for supplying power to an electrical load. The ac-ac power converter system provides an output voltage having variable amplitude and/or frequency. The ac-ac power converter system includes a boost inductor for applying a d... | 02/05/2008 |
| 7321228 | Detection of metal disturbance in a magnetic tracking system A method for tracking an object includes producing energy fields at a plurality of different frequencies in a vicinity of the object, and receiving signals that are generated at a location of the object at the different frequencies in response to the energy fields. ... | 01/22/2008 |
| 7313430 | Method and apparatus for performing stereotactic surgery A stereotactic navigation system for navigating an instrument to a target within a patient may include a stereotactic head frame, an imaging device, a tracking device, a controller and a display. The stereotactic head frame is coupled to the patient and is used to a... | 12/25/2007 |
| 7305864 | Ball and socket joint for a motor vehicle A ball joint for a motor vehicle includes a housing (6) having a cavity (5), and with a ball pivot (1), which has a pin (2) and a joint ball (3) and which, with its joint ball (3), is mounted in the cavity (5) of the ... | 12/11/2007 |
| 7302982 | Label applicator and system A label applicator including a support surface having a central area and curving downwardly from the central area. A post assembly extends up from the central area such that a label having a label through-hole can be positioned in a support position generally on the... | 12/04/2007 |
| 7301328 | Through the hole rotary position sensor with a pair of pole pieces disposed around the periphery of the circular magnet A through the hole rotary position sensor which incorporates a single ring magnet with a central aperture is disclosed. The rotating shaft whose angular position is to be sensed is adapted to be received in the central aperture. The through the hole rotary position ... | 11/27/2007 |
| 7299708 | Rotor angle estimation for permanent magnet synchronous motor drive A method of determining a rotor angle in a drive control for a motor, comprising the steps of (a) determining a rotor magnetic flux in the motor; (b) estimating the rotor angle on the basis of the rotor magnetic flux; and (c) correcting the estimated rotor angle on ... | 11/27/2007 |
| 7292948 | Magnetic position and orientation measurement system with eddy current distortion compensation Techniques for removing distortion in an AC magnetic tracker identify a characteristic frequency in the distortion environment which is then utilized to extract distortion components from the tracker receiver signals so that the corrected position and orientation ca... | 11/06/2007 |
| 7288931 | Method for determining residual error compensation parameters for a magnetoresistive angle sensor and method for reducing a residual angle error in a magnetoresistive angle sensor In a method of determining residual error compensation parameters for a magnetoresistive angle sensor providing a first measurement signal depending on a rotational angle the step of generating a plurality of value pairs for a plurality of rotational angle values is... | 10/30/2007 |
| 7288932 | Device to correct interference errors between magnetic sensors for measuring the position of mobile elements A device to correct interference errors in a measuring installation (A) that includes at least two magnetic sensors (11, 12) for measuring the position of mobile elements (21, 22) that are movin... | 10/30/2007 |
| 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 |
| 7281223 | System and method for modeling an integrated circuit system The teachings of the present invention provide a method for modeling an integrated circuit system including a microchip, an integrated circuit package, and a printed circuit board. The method includes generating a configuration file including parasitics regarding ba... | 10/09/2007 |
| 7276898 | Long stroke hall position sensor having a shaped pole An apparatus having a position sensor for determining a position of a moveable component is provided. The apparatus comprises a housing, a positioning member, a shaped magnetic pole, a magnet, and a hall effect sensor. The positioning member, the shaped magnetic pol... | 10/02/2007 |
