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| Number | Title | Issue Date |
| 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 |
| 7352174 | Non-contact rotary movement sensor provided with independent switch It is an object of the present invention to provide a non-contact rotary movement sensor capable of, by making magnetic fields from a plurality of permanent magnets not mutually affected, independently implementing an output signal and a switching signal using the s... | 04/01/2008 |
| 7292025 | Bipolar interrogation for magnetostrictive transducers A magnetostrictive-based sensor is disclosed which obtains higher return signals through the use of multiple consecutive input pulses. ... | 11/06/2007 |
| 7282907 | Antifriction bearing unit having a sensor and a resolver An outer ring is provided with the stator of a resolver, and a ring member with the rotor of the resolver. The stator comprises an annular core and a winding provided around the core. The ring member is provided at a position opposed to the stator with an eccentric ... | 10/16/2007 |
| 7263781 | Position-measuring device for fluidic cylinder-and-piston arrangements A position-measuring device for fluidic cylinder-and-piston arrangements having at least one Hall sensor, preferably arranged in the area of the cylinder wall, especially in a cylinder wall, and a magnetic region, arranged in the piston. At least one Hall sensor arr... | 09/04/2007 |
| 7208940 | 360-Degree magnetoresistive rotary position sensor A 360-degree magnetoresistive rotary position sensor comprises a magnetic linear sensor and a magnetic angular sensor, formed on a semiconductor substrate. The linear sensor detects a sense of a magnetic field, and the angular sensor detects an angular position of t... | 04/24/2007 |
| 7202658 | Piston velocity detector A piston velocity detector to determine the velocity of a magnet carrying piston in a cylinder, preferably in the form of a self-contained, hand-held, battery powered piston velocity detector including a plurality of magnet field sensors disposed in an array fixedly... | 04/10/2007 |
| 7170283 | Device for detecting a position of a magnetic pole A position-of-magnetic-pole detecting device includes first and second units for inferring a position of a magnetic pole. The first unit applies a current command while changing an excitation phase, infers a domain, where the position of a magnetic pole lies and whi... | 01/30/2007 |
| 7148679 | Transformer probe A probe (10) for sensing movement of a body of magnetic material comprises a magnetically energisable pole piece (30), a closed loop electrical circuit (20) having a first end (25) which is wound around the pole piece (30) and form... | 12/12/2006 |
| 7132948 | System for optimally 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 ... | 11/07/2006 |
| 6992479 | Magnetic sensor array configuration for measuring a position and method of operating same A magnetic position sensor for measuring a position of a ferromagnetic target over a range. The sensor comprises a magnet at least as long as the range and a sensor array mounted upon a surface of the magnet. The array is at least as long as the range and includes a... | 01/31/2006 |
| 6984954 | Diagnostic strategy for an electric motor using sensorless control and a position sensor A strategy to control and diagnose the operation of an electric motor using a sensorless control system augmented by feedback from a position and speed sensor is disclosed. The strategy can improve the robustness of operation and diagnose potential faults in electri... | 01/10/2006 |
| 6960910 | Method for phase matching by detecting magnetic flux A method for phase matching matches a relative phase of a first element and a second element by detecting a magnetic flux. The method provides a magnetic flux generator to generate the magnetic flux. The method also provides a magnetic sensor in order to detect the ... | 11/01/2005 |
| 6956368 | Magnetic rotational position sensor A magnetic rotational position sensor comprising a magnetic circuit including a loop pole piece and a magnet, and a magnetic flux sensor adapted to sense varying magnitudes of magnetic flux density associated with the magnetic circuit. The loop pole piece has a peri... | 10/18/2005 |
| 6949922 | Turbine blade clearance on-line measurement system A system (90) for measuring the gap (16) between a rotating blade (14) and a stationary component (12) of a turbo-machine, including an eddy current coil (30) and an eddy current tester (91). The eddy current tester may exci... | 09/27/2005 |
| 6897648 | System for transmitting the position of a control element The present invention relates to a system for reliably transmitting the position of a control element to an electronic processing unit by way of electric signal lines, wherein the position signal is transmitted by way of several signal channels, and use thereof in a... | 05/24/2005 |
| 6876209 | Capacitive angular position sensor A sensor assembly for sensing angular position of one object relative to another object. A capacitor is formed between a transmitter capacitor plate having a pair of transmitter electrodes and a receiver capacitor plate having preferably eight receiver electrodes fo... | 04/05/2005 |
| 6750626 | Diagnostic strategy for an electric motor using sensorless control and a position sensor A strategy to control and diagnose the operation of an electric motor using a sensorless control system augmented by feedback from a position and speed sensor is disclosed. The strategy can improve the robustness of operation and diagnose potential faults in electri... | 06/15/2004 |
| 6707293 | 360-degree rotary position sensor having a magnetoresistive sensor and a hall sensor By combining outputs from a Hall sensor and a magnetoresistive (MR) sensor, a 360-degree rotary position sensor can be achieved. The Hall sensor and the MR sensor both detect a magnetic field produced by a magnet. The Hall sensor detects the polarity of the magnetic... | 03/16/2004 |
| 6664786 | Magnetic field sensor using microelectromechanical system A microelectromechanical systems (MEMS) Device manufactured on a microscopic scale using integrated circuit techniques provides a sensitive magnetic field sensor by detecting motion caused by the Lorentz force produced by a current through a MEMS conducto... | 12/16/2003 |
| 6346806 | Device for detecting the position of a moveable magnet to produce a magnetic field The invention relates to a device for detecting the position of a magnet which is positioned so that it is moveable (3, 23, 24) to produce a magnetic field (6) through a ferromagnetic wall (1, 29), a magnetic field sensor (10, 21, 21') being situated in f... | 02/12/2002 |
| 6292758 | Linear perturbation method for Kalman filter tracking of magnetic field sources Methods including a Kalman filter tracking method for localizing a magnetic field source and which employs a linear perturbation method. The linear perturbation method linearizes an objective function in the neighborhood of the actual source enabling the ... | 09/18/2001 |
| 6269324 | Magnetic object tracking based on direct observation of magnetic sensor measurements A magnetic object tracking algorithm, that may be implemented as an apparatus or a method, that permits kinematic tracking of magnetized objects, or targets, using magnetic field strength measurements derived from one or more vector magnetometers. The mag... | 07/31/2001 |
| 6125697 | Apparatus and method for measuring the quantity of liquid in a liquid reservoir An autonomous apparatus for measuring the amount in volume, weight or level of a liquid in a tank. The invention provides an easy to read digital numerical display in what ever units the user has calibrated it for, indicating the amount of fluid in the ta... | 10/03/2000 |
| 6122538 | Motion--Monitoring method and system for medical devices A system and method for tracking the position and orientation of a movable medical imaging device using a first and second sensor disposed on the device. The second sensor is of a different type than the first sensor and measures a P/O parameter different... | 09/19/2000 |
| 6064197 | Angle sensor having lateral magnetic field sensor element and axial magnetic field direction measuring element for determining angular position An angle sensor includes a lateral magnetic field sensor element (1) for producing a sensor signal (US) which is dependent on the angular position of a target object (6) which is rotatable about an axis of rotation (5). The lateral magnetic fie... | 05/16/2000 |
| 5831431 | Miniaturized coil arrangement made by planar technology, for the detection of ferromagnetic materials A miniturized coil arrangement made by planar technology for the detection f material having a magnetic permeability other than zero, provided with a magnetizable core in a first plane of a substrate, an electrically energizable coil wound around a first s... | 11/03/1998 |
| 5793201 | Position indicating encoder with magnetic end position determining elements An encoder for determining a position of an object and including a measuring standard, a standard carrier, and a scanner displaceable relative to the measuring standard for scanning the measuring standard, with the limit positions switches being formed as... | 08/11/1998 |
| 5790046 | Sensor with a programmable switching threshold A programmable switching threshold sensor including a sensing element having its measurement output terminals connected to a comparator, a current-signal generator, for generating a reference current signal changing in steps. An encoding unit has a code a... | 08/04/1998 |
| 5731996 | Dipole moment detector and localizer A processing method and apparatus that process magnetometer data derived from an array of magnetometer sensors and outputs the position or location of a magnetic dipole. In the method and apparatus, (a) a set of actual magnetic field measurements of a mag... | 03/24/1998 |
| 5684396 | Localizing magnetic dipoles using spatial and temporal processing of magnetometer data Processing methods and apparatus that process magnetometer data derived from an array of magnetometer sensors and outputs both the position and velocity of a magnetic dipole. In the method and apparatus, (a) a set of actual magnetic field measurements of ... | 11/04/1997 |
| 5625289 | Magnetic device for detecting angle of rotation For detecting the angle of rotation of a shaft, in particular of a gear shift shaft in a gear change box for a motor vehicle, a device is proposed in which a carrier arrangement carries a magnet and in its proximity magnetically sensitive sensors. A scree... | 04/29/1997 |
| 5574233 | Non-contact railway wheel test apparatus and method The present invention provides a non-contact test apparatus and method for evaluating an as-manufactured railway wheel, which apparatus has a plurality of non-contact sensors positionable in proximity to various wheel locations and coupled to a controller... | 11/12/1996 |
| 5552644 | Proximity switches There is disclosed a two wire AC power supply for proximity switch integrated circuits. A problem has existed with previous power supplies in that such have been implemented using discrete devices, which take up valuable room on any printed wiring assembl... | 09/03/1996 |
| 5521497 | Measuring arrangement for contactlessly detecting the distance between two components The invention is directed to a measuring arrangement which is mounted to detect, without contact, the distance between two components which are movable relative to each other. A component 22 has at least one magnet 25 in order to obtain, with less technic... | 05/28/1996 |
| 5502379 | Sensor for measuring the swing of a cable including a crown with permanent magnets secured to the cable A sensor for measuring the swing of a cable or load includes a crown which creates a stable magnetic field, and a fixed portion for detecting movement of the crown, and the cable or load to which the crown is attached. The crown is secured to the cable an... | 03/26/1996 |
| 5497082 | Quadrature detector with a hall effect element and a magnetoresistive element A position sensor is provided with the capability of detecting a quadrature signal by the provision of first and second magnetically sensitive devices. The first magnetically sensitive device comprises a Hall effect element or some other device which is c... | 03/05/1996 |
| 5478966 | Hinged long-reach magnetic detector for liquid level measurements The detector is a foldable one constructed of unit elements 1a-1n connected with each other through hinge members 6. The members 6 are staggered in arrangement along the longitudinal direction of the unfolded or stretched detector so as to permit the dete... | 12/26/1995 |
| 5412317 | Position detector utilizing absolute and incremental position sensors in combination An absolute type position sensor, preferably of the magnetostrictive line type, and a semi-absolute type position sensor, preferably of the magnetic induction type, are operated in parallel with each other, and their moving portions are connected to each ... | 05/02/1995 |
| 5239474 | Dipole moment detection and localization An array of magnetic sensors and a digital signal processor are used to break a target magnetic dipole field into its components, and a magnetic signature of the present magnetic field is created. Predicted target signatures are precomputed for multiple m... | 08/24/1993 |
