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7612557 |
Eddy current type sensor for detecting conductor
An eddy current type sensor for detecting a conductor includes a LC circuit and an oscillator. The LC circuit has a coil and a capacitor connected in parallel with the coil. The oscillator supplies...
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7597176 |
Elevator car position determining system and method using a signal filling technique
A method for determining a position of a moving object, such as an elevator car in an elevator shaft, includes the steps of mounting a leading sensor and a lagging sensor to the moving object and...
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7583080 |
Rotation angle detection device and rotation angle correction method
A device for detecting an absolute rotation angle of multiple rotation with a high accuracy and high resolution by using a target connected to the rotation axis and having an outer circumferential...
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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...
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7564238 |
Magnetic detection device connecting element and detection circuit and method of manufacturing the same
A magnetic detection device has stable characteristics having an area of a resist layer covering an insulating passivation layer, forming the magnetic detection element and a connection layer on a...
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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...
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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...
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7508200 |
Means and method for reducing magnetic cross-talk in biosensors
A magnetic sensor (MS) for sensing a magnetic stray field (SF) generated by magnetizable object (SPB) when magnetized and for generating an electrical object signal (U OB ) which depends on the...
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7495434 |
Magnetoresistive sensor element for sensing a magnetic field
A magnetoresistive sensor element has a first magnetic layer structure, a second magnetic layer structure, and a barrier layer. The resistance R 1 of the first magnetic layer structure, the...
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7492149 |
Circuit configuration for processing a signal of a sensor and method of using the circuit configuration
A circuit configuration for processing a signal of a sensor includes an amplifier for amplifying the signal of the sensor. This signal has switch-over points between different signal states. The...
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7468604 |
Magnetic detector maintaining high detection precision without affected by the temperature characteristics of the sensing element
A magnetic detector, wherein the magnetic/electric conversion element is constituted by at least six segments symmetrically arranged in a direction in which the magnetic moving body rotates...
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7463020 |
Inductive proximity switch based on a transformer coupling factor principle
The invention relates to a preferably ferriteless inductive proximity switch having at least one transmitting coil, one oscillator circuit and at least two receiving coils arranged in the...
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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...
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7436120 |
Compensation of magnetic fields
For compensation of a magnetic field in an operating region a number of magnetic field sensors (S 1 , S 2 ) and an arrangement of compensation coils (Hh) surrounding said operating region is used....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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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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...
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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 ( 1 1 , 1 2 ) for measuring the position of mobile elements ( 2 1 , 2 2 ) that...
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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...
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7265542 |
Process and device for contactless measurement of rotational speed
A process and a device for contactless measurement of rotational speed with a proximity sensor operating according to the eddy current principle. The proximity sensor comprises an inductor and a...
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7262592 |
Linear variable differential transformers for high precision position measurements
A linear variable differential transformer (LVDT) is disclosed that has first and second coil is formed of materials that minimize the Barkhausen noise, and hence which produces outputs that are...
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7262591 |
Technique for sensing the rotational speed and angular position of a rotating wheel
A method of processing a pulse train output signal provided by a non-contact sensor that senses the rotational speed and angular position of a rotating wheel includes comparing the amplitudes of...
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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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7239133 |
Methods and systems for controlling the temperature stability of an inductor
Methods and systems a method of assembling a proximity probe are provided. The method includes determining a coil wire dimension and coil geometry for the probe such that a resistance versus...
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7233139 |
Method and apparatus for sensing angle of rotation which compensates an output signal from a magnetic sensor element irrespective of the range of rotational angles of a target object
An angular position sensor including a magnetic field generator means and a magnetic sensor means. The magnetic field generator means produces a magnetic field. The magnetic sensor means has a...
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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,...
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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...
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7141964 |
Adaptive integrated circuit for magnetoresistive sensors
A device, system and method for adaptively tracking amplitude boundary values of a real time sensor output signal. In accordance with the method of the present invention, an amplitude boundary...
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7138793 |
Methods and apparatus for dynamic offset adjustment in a magnetic article detector
Apparatus and methods for detecting passing magnetic articles including an offset adjustment circuit for adjusting the DC level of the magnetic field signal based on a dynamically adjustable offset...
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7138794 |
Detection of faults in linear and rotary voltage transducers
Systems and methods for detecting faults in RVDTs and LVDTs are described. In an exemplary embodiment, a sum of secondary voltages V1 and V2 from a transducer is obtained by adding the secondary...
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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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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...
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7132824 |
Position detector, camera-shake compensation mechanism, and image capture apparatus
A position detector includes a magnet, a pair of Hall effect devices, and a processing circuit for detecting relative positions of the magnet and the pair of Hall effect devices. The processing...
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7106052 |
Inductive proximity switch with differential coil arrangement
Inductive proximity switch has a first transmitting coil (S 1 ) and a first receiving coil (E 1 ) of a receiving coil arrangement. The transmitting coil (S 1 ) transmits an exciting field inducing...
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7071834 |
Device for monitoring the operating conditions of rolling bearing
A device for monitoring the operating conditions of a rolling bearing, has the rolling bearing including: an outer ring of a metal with outer raceway; an inner ring of a metal with an inner...
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7061229 |
Circuit for compensating 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...
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7053603 |
Circuit arrangement with a linear variable differential transformer (LVDT) as a displacement sensor or force sensor
In a circuit arrangement having a linear variable differential transformer as a displacement sensor or force sensor, having a selection circuit which is connected to the primary coil of the...
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7032617 |
Intake air control apparatus for an engine
An intake air control apparatus for an engine is capable of suppressing the influence of external magnetic flux from outside thereby to prevent a variation in an output of a rotational angle...
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7030604 |
Thermal coefficients of nudge compensation and tare for linear and rotary MR array position transducers
Methods and systems are disclosed in which the errors caused by thermal expansion in magnetoresistive position transducers are reduced by predicting the physical alterations over temperature...
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7012420 |
Measuring device to record values, in particular angles or linear segments
A measuring device for the recording of values, in particular angles or linear values, includes a measured value processor and a sensor arrangement, which supplies two phase-shifted signals....
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7009385 |
Flux compensated rotational position detector and operating methods therefor
A flux compensated rotational position detector includes a rotating element having a plurality of magnetic poles extending over its entire periphery, and a fixed element having a plurality of...
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7005851 |
Methods and apparatus for inspection utilizing pulsed eddy current
In some aspects, the present invention provides a method for estimating at least one measurement/object property of a metal object. The method includes generating a time-varying eddy current in a...
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6992477 |
Medical device with position sensor having core with high permeability material for determining location coordinates of a portion of the medical device
A medical location system includes a medical device having a body and a position sensor at a portion of the body. The position sensor has a core made of a Wiegand effect material and a winding...
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6958599 |
Angular velocity sensor
An angular velocity sensor for a rotor ( 2 ) and method of determining angular velocity in which the position at which event generation means ( 4 ) pass sensing means ( 5 ) is determined using...
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