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7619406 |
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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7583078 |
Rotation angle detecting device and method of correcting temperature characteristic of the same
A method of correcting temperature characteristic of a rotation angle detecting device that includes a permanent magnet, a magnetic core, a Hall element that rotates relative to the permanent...
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7548065 |
Skin depth compensation for an in-ground transmitter
In a system in which a transmitter is moved through the ground in a region which includes an electrical conductivity characteristic and the transmitter transmits a locating signal for reception,...
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7514918 |
Monitoring wall thickness
There is disclosed a method for monitoring wall thickness of an object having an electrically conductive wall, using a pulsed eddy current probe, wherein the same location on the wall is inspected...
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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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7505859 |
Method and algorithms for inspection of longitudinal defects in an eddy current inspection system
A collection of data processing algorithms which, used in concert, are suitable for use in place of a high pass filter stage in an eddy current inspection system and provide for a system optimized...
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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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7414391 |
Electromagnetic logging tool calibration system
Techniques for calibrating an electromagnetic logging tool equipped with a plurality of antennas, with at least one antenna having its axis at an angle with respect to a tool axis, include...
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7400136 |
Multiscale localization procedure
Position measurements are often performed using a localization system with a given fixed capture range and accuracy and resolution. Having a fixed capture range often comes at the cost of decreased...
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7391217 |
Metal detection methods and apparatus wherein a numeric representation of the sense signal and a noise contribution to the sense signal are produced
Metal detectors include a sense coil coupled to an analog to digital converter that produces a numeric representation of an electrical signal associated with a conductive object situated in an...
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7391204 |
Sensor signal conditioning circuit
A sensor signal conditioning circuit and sensor system incorporating the same. In one embodiment, the signal conditioning circuit includes a DC-coupled detector that converts a sensor signal into a...
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7382122 |
Magnetic sensor
A magnetic sensor includes a pair of serially-connected magneto-resistive elements ( 1 a , 1 b ), one of which serves as a sensing portion ( 6 ) made to face a magnetic detecting medium (S), and...
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7375515 |
Magnetic sensor circuit and semiconductor device capable of temperature compensation
A magnetic sensor circuit supplying an excitation current to an MI device, and having a detection signal supplied thereto corresponding to a magnetic field intensity from the MI device based on the...
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7348771 |
Method for verifying sensor condition
Sensor condition verification may be performed on electromagnetic sensors and sensor arrays mounted to a material surface. The sensors typically have a periodic winding or electrode structure that...
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7345476 |
Method and apparatus for measuring an entity of a magnetic field by using a hall plate, an excitation signal and a detection signal
Method and apparatus for measuring an entity of a magnetic field using a Hall sensor which is provided with at least one Hall plate which has a group of two pairs of terminals located at a distance...
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7304474 |
Eddy current inspection device with arrays of magnetoresistive sensors
There is provided an inspection device for the detection of flaws in a component. The inspection device comprises a magnetic field generator, a first array of magnetoresistive sensors and a second...
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7291891 |
In-solid nuclear spin quantum calculation device
A voltage is applied across gate electrodes ( 103 A) and ( 103 B) in a two-dimensional electronic system ( 101 ) placed under a magnetic field, and the polarity of an electric current passed...
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7282909 |
Methods and apparatus for determining the thickness of a conductive layer on a substrate
A method of determining the thickness of a conductive film is disclosed. The method employs measured voltage and current responses that have been temperature-compensated to determine the thickness...
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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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7184910 |
Method of compensating sensor data and evaluating an interlock of an interlock system
A method of compensating sensor data and a method of evaluating an interlock of an interlock system, in which an allowable variation between sensors varying depending on a driving time for a set of...
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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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7145329 |
Manually operated working tool
The present invention relates to a manually operated working tool such as an internal combustion operated setting tool for driving in fastening elements such as nails, bolts, pins into a...
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7123005 |
Magnetometer with structure asymmetry correction
A differential magnetometer consisting of at least one active coil ( 4, 5 ) and a receiver coil ( 10 ) for which the windings are installed differentially, is provided with a measurement circuit (...
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7098657 |
Method of stabilising a magnetometer signal, and stabilised magnetometers
The magnetometer includes a magnetic core ( 1 ) with at least one branch ( 2, 3 ), at least one exciting coil ( 4, 5 ) and one take-up coil ( 10 ) sensitive to ambient fields thanks to the...
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7091832 |
Acoustic detection of machinery malfunction
A sound variation indication apparatus includes a comparison element, an interval checker, and an indication generator. The comparison element receives an audio signal and compares it to a check...
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7091717 |
Squid sensor using auxiliary sensor
A SQUID (Superconducting QUantum Interference Device) sensor using an auxiliary sensor, includes a SQUID sensing unit having a SQUID and a first feedback coil for creating a magnetic field at a...
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7084623 |
Non-destructive inspection device and method utilizing a magnetic field and sensor coil array
A non-destructive inspection device (X 1 ) includes an exciting pole ( 10 ) having a magnetic flux exciting surface ( 11 ) for exciting a magnetic flux to form a magnetic field in an inspection...
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7084622 |
Methods for eliminating magnetic field and temperature related errors in magnetic sensors used for the measurement of coating thickness
Methods for eliminating error in magnetic sensors used for measuring a coating thickness caused by static or changing external magnetic fields or temperature. The methods involve measuring an...
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7075290 |
Tachometer apparatus and method for motor velocity measurement
A method and apparatus for determining the velocity of a rotating device is described herein. The apparatus includes a magnet assembly affixed to a rotating shaft of a rotating device and a circuit...
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7070476 |
In-situ metalization monitoring using eddy current measurements during the process for removing the film
A method for measuring conductance of a sample using an eddy current probe with a sensing coil. The method includes N repetitions of measuring first and second voltage pairs including in-phase and...
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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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7046002 |
Magnetic sensor with variable sensitivity
A microelectromechanical system (MEMS) device comprising a base structure; a magnetic sensor attached to the base structure and operable for sensing a magnetic field and allowing for a continuous...
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7019519 |
Thickness estimation using conductively related calibration samples
A method for monitoring an inspection sample includes generating inspection data comprising resistance and reactance measurements that are obtained from an inspection sample having a conductive...
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6946833 |
Polar coordinates sensor having an improved flux suspension system and excitation method
An improved polar coordinates sensor comprising a pot-core half having a concentric winding window surrounded by a washer-like high conductive Lenz lens. A toroidal core stack concentrically...
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6933718 |
Quantification method and system for corrosion and damage assessment
The present invention provides a method for the direct measurement and quantification of the material volume loss on and beneath a first surface of a substrate and thus provides an accurate...
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6927572 |
Method and apparatus for the compensation of dynamic error signals of a chopped hall sensor
A method for compensation of dynamic error signals of a chopped Hall sensor that comprises at least one Hall sensor element comprising a plurality of terminal pairs for impressing an excitation...
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6922053 |
Complementary sensors metrological process and method and apparatus for implementing the same
A method for detecting a thickness of a layer of a wafer to be processed is provided. The method includes defining a plurality of sensors configured to create a set of complementary sensors...
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6906514 |
Concept for compensating the influences of external disturbing quantities on physical functional parameters of integrated circuits
A circuit for generating an output signal, which depends on a physical useful quantity includes means for detecting the physical useful quantity, wherein the means for detecting is arranged to...
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6894491 |
Method and apparatus for metrological process control implementing complementary sensors
A method for detecting a thickness of a layer of a wafer is provided. The method includes defining a particular radius of a wafer carrier configured to engage the wafer to be processed. The method...
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6882146 |
Method and system for determining the orientation of magnetic fields by means of GMR sensors
The invention relates to a method and a system for determining the orientation of an external magnetic field by means of giant magneto-resistor (GMR) sensors. A sensor circuit is provided with two...
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6867585 |
Circuit and method for compensating for temperature
A circuit ( 1 ) for compensating for temperature with a sensor operating by the eddy current principle for measuring physical conditions of an object. The circuit includes an evaluation unit ( 3 )...
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6850859 |
Sensor drift compensation by lot
Drift compensation systems and methods are presented for compensating the drift of a sensor within a manufacturing lot. The system comprises a sensor test sample manufactured from a lot of material...
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6850053 |
Device for measuring the motion of a conducting body through magnetic induction
A device for measuring a motion of a moving electrically conducting body is disclosed. A magnetic field generated by, for example, electromagnets or permanent magnets, penetrates at least a partial...
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6768301 |
Hall sensor array for measuring a magnetic field with offset compensation
A Hall sensor array for offset-compensated magnetic field measurement comprises a first and at least one additional pair of Hall sensor elements. Each Hall sensor element has four terminals, of...
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6762603 |
Dual mode coating thickness measuring instrument
A coating thickness measuring instrument is provided. The coating thickness measuring instrument has a first mode of operation in which it is operative to make measurements with a first resolution...
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6734670 |
Determining a surface profile of an object
A method of determining a surface profile of an electrically conductive object, using a probe having a transmitter adapted for inducing transient eddy currents in the object, and a receiver which...
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6724187 |
Methods for eliminating error sources of magnetic sensors used for the measurement of coating thickness
A method which compensates errors resulting from offset voltages and external magnetic fields when a magnetic sensor is used to measure coating thickness. The method also allows compensation of a...
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6710599 |
Apparatus for measuring terrain conductivity
A conductivity meter for measuring conductivity of terrain, including a first transmitter coil, a signal generator connected to the first transmitter coil to supply a time-varying current thereto...
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6696834 |
Magnetic field probe having a shielding layer to protect lead wires with an isolating layer
A magnetic field probe includes a substrate and a conductive layer provided on the substrate. The conductive layer has a coil, lead wires, and pads. The coil has at least one turn and outputs a...
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