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7612556 |
Rolling bearing
The rolling bearing apparatus of the present invention comprises a rolling element, a non-rolling element disposed concentrically with the rolling element, and a rotation detector for outputting an...
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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...
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7571855 |
Display with symbology
In embodiments, data corresponding to an object is determined from symbology.
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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...
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7562591 |
Steering angle sensor
An apparatus for determining an angular position of a shaft, such as a steering column, comprises a coil assembly, a coil support, and a coupler element having a coupler angular position correlated...
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7538544 |
Inductive position sensor
An inductive position sensor for position sensing includes a transmitter coil and a receiver coil, the receiver coil generating a receiver signal when the transmitter coil is excited by an...
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7532997 |
Electromagnetic tracking using a discretized numerical field model
A method for electromagnetic tracking the position and orientation of an object using a discretized numerical field model, rather than the conventional analytical dipole model. The method including...
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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...
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7514919 |
Sensing apparatus and method
A sensor for sensing a parameter such as position, comprises: (i) an excitation winding for example coils ( 7, 9 ) in quadrature; (ii) a signal generator ( 41, 42, 43 ) operable to generate an...
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7511482 |
Inductive proximity switch
An inductive proximity switch with a housing formed of a nonmagnetic, high-grade steel, with a transmitting coil, two receiving coils which are connected in series in opposite directions and which...
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7508195 |
Anti-distortion electromagnetic sensor method and system
A source for inducing an electromagnetic magnetic field, comprising: a substrate, a conductive layer coupled to the substrate, and a planar coil coupled to the substrate, wherein the planar coil...
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7482803 |
Inductive position sensor using reference signal
An apparatus providing a signal related to a position of a coupler element comprises an exciter coil and a receiver coil, the apparatus being operable to provide a signal correlated with the...
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7463987 |
Magnetic sensing system and method
A coil at a first location in magnetic communication with a door of a vehicle generates a magnetic field responsive to a time varying signal applied thereto. The first location and the coil are...
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7449878 |
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...
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7449879 |
Apparatus detecting relative body movement
The invention relates to a measuring device for detecting a body moving in relation to an, in particular, tubular container. Said device comprises at least one magnet unit which generates a...
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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...
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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...
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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 ( 12 i ) fixed to one of at least two objects ( 44, 46 ) moving relatively...
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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...
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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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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...
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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...
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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...
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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...
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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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7301348 |
Electrostatic encoder
An electrostatic encoder comprising receiving coupling electrodes formed on a scale, and extending in a predetermined direction, transmitting coupling electrodes provided on a sensor head, and...
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7298137 |
Position sensing apparatus and method
There is described an inductive position sensor in which a signal generator applies a excitation signal to an excitation winding formed on a first member, the excitation winding being...
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7292026 |
Signal conditioning system for inductive position sensor
An apparatus and a method for providing an output signal correlated with a part position for a moveable part over a positional range, the apparatus includes a transmitter coil, the transmitter coil...
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7285951 |
Method and device for magnetic measurement of the position and orientation of a mobile object relative to a fixed structure
A method and device for magnetic measurement of the position and orientation of a mobile object relative to a fixed structure. The device comprises, Integral with the structure, a magnetic fields...
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7279890 |
Tandem rotation detector for high precision detection
A tandem rotation detector is provided for effectively preventing the occurrence of leakage flux between rotation angle detection mechanisms so that high-precision detection can be always realized....
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7268537 |
Rotation angle detection device that converts m-phase windings into two-phase windings and dynamo-electric machine using the same
Disclosed are a rotation angle detection device including: a stator provided with a one-phase excitation winding and two-phase output windings; and a rotor having salient poles, and a...
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7257506 |
Position detecting system and method
A position detection system for locating an object including a magnetic field generator is disclosed. The position detection system also includes an array of parallel conductors responsive to a...
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7248994 |
Digital method and apparatus for sensing position with a linear variable differential transformer
An apparatus and method for determining a linear position from a linear variable differential transformer (LVDT) including a primary coil driven by an excitation signal, and two secondary coils...
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7242182 |
Position sensor and corresponding method for detecting the position of a rotating element
A low-wear sensor with little structural outlay to detect a combined linear and rotational movement, such as in a print roller ( 10 ). In one embodiment, a PLCD (Permanent Magnetic Linear...
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7239130 |
Compact pitch-compensated inductive displacement transducer
An induced current position transducer reduces spatial phase errors associated with layout constraints. Each winding of the transducer comprises a set of loops arranged in hypothetical basic...
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7221152 |
Method in salient-pole permanent magnet synchronous machine
A method for determining the speed and position of a rotor of a salient-pole permanent magnet synchronous machine, the method comprising the steps of creating a voltage model ( 41 ) on a permanent...
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7196510 |
Induction type displacement detector
The invention provides an induction type displacement detector capable of achieving an improved resolution and high precision. The induction type displacement detector comprises a scale, and a...
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7191759 |
Inductive sensor for vehicle electronic throttle control
An apparatus for allowing electronic engine speed control comprises a transmitter coil, a receiver coil providing a receiver signal when the transmitter coil is excited due to an inductive coupling...
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7190158 |
Inductive angle-of-rotation sensor and rotary transducer equipped with the same
An inductive angle-of-rotation sensor, which is composed of a printed-circuit board, on which an excitation printed conductor and a receiving printed conductor are applied, the receiving printed...
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7188592 |
Position sensor of a valve actuator for an internal combustion engine
A sensor of the position of a target is secured to an electromagnetic or electromechanical valve actuator of an internal combustion engine. The target is driven by a reciprocating translatory...
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7174202 |
Medical navigation apparatus
Methods and apparatus are provided for locating the position, preferably in three dimensions, of a sensor by generating magnetic fields which are detected at the sensor. The magnetic fields are...
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7157906 |
Double variable reluctance resolver for a multiple speed resolver system
A double variable reluctance resolver in which a redundancy is given to a variable reluctance resolver to improve reliability. The double variable reluctance resolver also functions as a multiple...
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7157903 |
Inductive sensor and rotary encoder provided with an inductive sensor
An inductive sensor includes at least two circuit boards and receiver circuit traces applied on the first circuit board. Arranged on the second circuit board are components of an evaluation...
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7138795 |
Rotation angle detector and its temperature correcting method
A first sin phase voltage representing the rotational angle of a resolver is derived from the sum of a rotational angle voltage involving a temperature component and a bias voltage. The rotational...
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7134448 |
Transducer for monitoring the position of a movable body
A transducer for monitoring the position of movable bodies and in particular for monitoring the position of valve flaps and other elements in connection with systems for fire extinction, is...
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7135860 |
Variable reluctance resolver including rotor with multiple detection portions
A variable reluctance resolver has a rotor with magnetic poles with 2× or greater axis combination angles, and is structured so that reliable and accurate zero point detection can be carried out....
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7135856 |
Method and device for determining the angular inclination of a shaft in a rotating machine
A method, system and inductive device for accurately determining inclination of a shaft arranged with a gear wheel including a plurality of gear teeth. The inductive measuring device includes a...
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7132825 |
Detection device
A device for detecting the displacement of an object comprising a ferromagnetic material, comprises a magnetic circuit generator provided with first and a second cores made of ferromagnetic...
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7112956 |
Method of generating an index signal with reduced parts
In an index signal generator for generating an index signal for use in a direct-drive motor having a rotation axis and comprising a stator and a rotor, a particular at least one of M magnetized...
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7096148 |
Magnetic tracking system
The present invention provides an electromagnetic tracking system that includes a field generator and a field sensor arranged to generate and detect, respectively, an electromagnetic field. Both...
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