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| Number | Title | Issue Date |
| 8159213 | Inductive non-contact measurement of a relative movement or relative positioning of a first object relative to a second object A non-contact measurement method for a relative displacement or relative positioning of a first object relative to a second object, in which: at least one transmitting coil, placed on the first object, is excited by an alternating excitation signal, at least one alt... | 04/17/2012 |
| 8013595 | AC magnetic tracking system with phase locking Plural transmitter coils of a magnetic locating system are driven with widely-separated main frequencies. One of the transmitter coils is also driven with a marker frequency close to the main frequency applied to that coil. The receiver determines a phase relationsh... | 09/06/2011 |
| 8004274 | Inductive position sensor An inductive position sensor, which in particular is a rotational angle sensor, is provided with two first transmitter units for the generation of two site-dependent first alternating fields having the same carrier frequency, and at least one oscillating circuit arr... | 08/23/2011 |
| 7999535 | Measuring device for determining a position between a primary part and a secondary part by magnetic flux measurements The invention relates to a measuring apparatus comprising a sensing head (15) for determining the position of a primary part (27) on a secondary part. The sensing head (15) is fixedly connected to a primary part (27) or is integrated ther... | 08/16/2011 |
| 7969143 | Method of tracking an object having a passive transponder attached thereto A method of tracking translation and rotation of one or more objects within a region of interest. The method includes providing a passive transponder in the region of interest, the transponder having a position and an orientation, generating an electromagnetic field... | 06/28/2011 |
| 7956603 | Sensor inductors, sensors for monitoring movements and positioning, apparatus, systems and methods therefore A generally planar shaped inductor is disclosed that is particularly adaptable for use in motion or position sensors. One inductor can function as a signal input unit and another as a pick up unit in an arrangement wherein both inductors are placed in a generally pa... | 06/07/2011 |
| 7932715 | Inductive detector with variable width loops on first and second surfaces of substrate An inductive detector operable to measure relative displacement along a measurement path of a first body including an electrical intermediate device and a second body including at least three windings. At least one winding is a transmit winding and at least one othe... | 04/26/2011 |
| 7902817 | Electromagnetic tracking method and system Provided is an electromagnetic tracking system, comprising a coil arrangement comprising a first coil configured to generate a first magnetic field and a second coil configured to generate a second magnetic field and a drive unit configured to provide a first drive ... | 03/08/2011 |
| 7880462 | Pulsed coil drive circuit for a sampled inductive transducer A pulsed coil drive for a sampled inductive transducer has at least one drive coil connected in a series circuit with a capacitor having a first terminal connected to the negative terminal of a voltage source. The series circuit is normally open during the intervals... | 02/01/2011 |
| 7868609 | Position sensor A position encoder is provided for indicating the relative position between first and second relatively move members. One of the members carries a magnetic field generator which generates a magnetic field whose magnitude and direction vary with position. In a prefer... | 01/11/2011 |
| 7821256 | Linear and rotational inductive position sensor An apparatus for providing a signal related to a position of a part comprises an exciter coil, and a receiver coil disposed proximate to the exciter coil. The exciter coil generates magnetic flux when the exciter coil is energized by a source of electrical energy, s... | 10/26/2010 |
| 7795861 | Method and apparatus for controlling a movable object for localization within a positioning area At least two coils located at different positions with regard to a positioning area are controlled to indicate a position of an object located within the range of magnetic fields generated by the coils. An embodiment of the invention comprises a generator that uses ... | 09/14/2010 |
| 7782046 | Electromagnetic tracking method and system Provided is an electromagnetic coil arrangement comprising a set of electromagnetic sensors at fixed locations with respect to each other, each of the electromagnetic sensors comprising a planar coil coupled to a conductive layer, the planar coil comprising non-conc... | 08/24/2010 |
| 7705585 | Inductive displacement detector A detector for measuring relative position along a measurement path comprising: a passive, laminar electrical intermediate device extending along the measurement path wherein the extent of the said electrical intermediate device in an axis normal to the measurement ... | 04/27/2010 |
| 7701201 | Inductive switch The invention relates to an inductive sensor unit having one or several coils, which are mounted on a printed circuit board in a planar manner. According to the invention, a change in the inductance of a sensor coil due to leakage currents in the inductive actuator ... | 04/20/2010 |
| 7652469 | Inductive position sensor An inductive position sensor has a spatially periodic scale with a series of conducting or permeable features of pitch T and a reading head with drive windings and sense windings, facing the scale with a spatial period 2T along the scale. The windings are each divid... | 01/26/2010 |
| 7605585 | Air-core transformer position sensor An air-core transformer position sensor includes an excitation coil, an output coil, and a sensor coil. The excitation coil is adapted to be electrically excited with an excitation signal. The output coil is inductively coupled to the excitation coil upon electrical... | 10/20/2009 |
| 7573258 | Coil arrangement for electromagnetic tracker method and system An electromagnetic coil arrangement comprising a plurality of electromagnetic sensors located about the periphery of a region and at least one center electromagnetic sensor located at or near the center of the region, wherein the plurality of electromagnetic sensors... | 08/11/2009 |
| 7521921 | Displacement sensor Sensors and methods for measuring displacement are disclosed. In one embodiment, among others, a resistive element is configured to receive an alternating voltage between a first electrical terminal and a second electrical terminal, the first and second electrical t... | 04/21/2009 |
| 7432704 | Inductor-type resolver An inductor-type resolver capable of reducing a residual voltage by providing a correction winding inside the resolver is provided. Two magnetic pole portions 11 and 15 include winding portions W11 and W12, respectively, which constitute ... | 10/07/2008 |
| 7426829 | Vane control An exemplary controller includes a control valve that includes an electric actuator operatively coupled to a valve stem, a piston operatively coupled to one or more hydraulic fluid paths controlled by the control valve and including a piston shaft, a rotatable shaft... | 09/23/2008 |
| 7402996 | Instrument and method for measuring three-dimensional motion An instrument (10) for measuring three-dimensional motion in a living body comprises a plurality of magnetism generators (12i) fixed to one of at least two objects (44, 46) moving relatively in the living body, a plurality of magnetic... | 07/22/2008 |
| 7385389 | Absolute rotary encoder and micrometer An absolute rotary encoder comprises a rotor having a bore passing through the center thereof to receive a shaft therein and arranged rotatably about the shaft and opposite a stator. Tracks are arranged concentrically on the rotor to form a track group. A transmitti... | 06/10/2008 |
| 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 |
| 7365334 | Automated three dimensional patient tracking during medical imaging procedures A patient movement system is used to detect movement of the patient in multiple of different coordinates. The movement of the patient is obtained in real-time and correlated to times of medical images, and used to compensate those medical images for the actual patie... | 04/29/2008 |
| 7355394 | Apparatus and method of dynamically measuring thickness of a layer of a substrate A method and apparatus are provided for measuring the thickness of a test object. The apparatus includes an eddy current sensor having first and second sensor heads. The sensor heads are positioned to have a predetermined gap therebetween for passage by at least a p... | 04/08/2008 |
| 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 |
| 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 |
| 7352177 | Three-axis fluxgate-type magnetism detecting device and method A three-axis fluxgate-type circuit having three fluxgate sensors for outputting three analog voltage values respectively. A controller normalizes three digital voltage values corresponding to said three analog voltage values, select a set of linear voltage values fr... | 04/01/2008 |
| 7348773 | Method and device for assessing ambient conditions of an installation site of a magnetic resonance imaging device In a method for assessing ambient conditions of an installation site of a magnetic resonance imaging device, various places in an area surrounding the installation site are examined by means of a detection unit for changes in a test magnetic field and the ambient co... | 03/25/2008 |
| 7345473 | Inductive position sensor with common mode corrective winding and simplified signal conditioning An inductive position sensor for rotary motion includes a transmitter coil and a receiver coil, the receiver coil generating a receiver signal when the transmitter coil is excited by an alternating current source. A movable coupler element modifies the inductive cou... | 03/18/2008 |
| 7343195 | Method and apparatus for real time quantitative three-dimensional image reconstruction of a moving organ and intra-body navigation Medical imaging and navigation system including a processor, a medical positioning system (MPS), a two-dimensional imaging system and an inspected organ monitor interface, the MPS including an imaging MPS sensor, the two-dimensional imaging system including an image... | 03/11/2008 |
| 7340345 | Method and circuit arrangement for determining a quality level of phase signals The present invention relates to a method and a circuit arrangement for evaluating phase signals for determining an angle or a path of a linearly or rotationally displaced component, whereby a number (N) of measured phase values (α), produced by scanning at ... | 03/04/2008 |
| 7327268 | System for wireless mobile seating platform A system (and method) includes a seating platform, at least one sensor for detecting a state of the seating platform connected to a first wireless communications device, the first wireless communications device for conveying information on the state of the seating p... | 02/05/2008 |
| 7322374 | Actuator for actuating a lift valve An actuator for actuating a non-camshaft driven lift valve (12) of an internal combustion engine (10) includes a reciprocating tappet (20) that is coupled to the lift valve (12), a target ring (26) being attached to the outer circu... | 01/29/2008 |
| 7324915 | Data transmission to a position sensor A method for transmitting control instructions to a sensor in a position tracking system includes generating a drive signal for driving a field generator. A control signal including the control instructions is superimposed on the drive signal. The field generator is... | 01/29/2008 |
| 7323140 | Moving microdroplets in a microfluidic device The present invention relates to a system and method for moving samples, such as fluid, within a microfluidic system using a plurality of gas actuators for applying pressure at different locations within the microfluidic. The system includes a substrate which forms ... | 01/29/2008 |
| 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 |
| 7320817 | Holding structure and a molding with the same A holding structure includes a held member located in a case, and a guiding space defined between the held member and a predetermined inner surface of the case. A primary molding resin is guided into the guiding space upon injection of the primary molding resin such... | 01/22/2008 |
| 7321229 | Inductive position sensors with secondary windings with increased or decreased number of turns A position sensor comprising a primary winding (26) for generating a magnetic flux, a first secondary winding (24.1) the number of turns of which increases in one direction, a second secondary winding (24.2) the number of turns of which increase... | 01/22/2008 |
