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7576534 |
System and method to forecast the electrical conductivity of anodes for aluminum production before baking
The system ( 10 ) and the method are used for forecasting the electrical conductivity of an anode ( 12 ) for aluminum production before the anode ( 12 ) is baked. In the system ( 10 ), at least one...
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7532127 |
Motion and position measuring for buried object detection
A hand-held, wand-type buried object detector includes a motion and position sensor that provides data about the sensor head of the buried object detector. An inertial measuring device including...
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7532123 |
Magnetic tagging
Articles are magnetically tagged by a spatial distribution of passive magnetic elements. Each such magnetic element comprises a layer of soft magnetic material characterised by high permeability,...
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7519487 |
System and method for depth determination of cracks in conducting structures
The alternating current potential drop ACPD technique is used to monitor surface cracks in electrical conductors. At high frequencies, the current flows in a superficial skin layer. Two distinct...
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7345474 |
Detector for magnetizable material using amplitude and phase discrimination
A detector for magnetizable materials operates remotely to determine a amplitude and phase modification of an exciting magnetic field caused by the magnetizable materials. These amplitude and phase...
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7285953 |
Device for detecting interfering pieces in material to be conveyed
A device for producing a detection signal when interfering, preferably metallic conductive pieces occur in an at least largely non-conductive conveyor stream. An alternating electromagnetic field...
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7241630 |
Paramagnetic particle detection
A method of determining the number of magnetic particles within a sample using a tuned circuit having a capacitor and a coil. The method comprises:
a. determining the difference in the...
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7215117 |
Measurement with a magnetic field
Material properties such as stress in a ferromagnetic material may be measured using an electromagnetic probe. While generating an alternating magnetic field in the object, and sensing the...
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7150798 |
Non-destructive testing method of determining the service metal temperature of a component
It is disclosed a method of determining the exposure temperature of Al and Cr of a γ/γ′ MCrAlY-coating after the use in a high temperature environment, the γ/γ′ MCrAlY-coating exhibiting a...
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7132943 |
Moving belt sensor
A detection system is provided which is configured to have a transmitter capable of interacting with an object by generating a field, and a multiplicity of receivers operative to measure changes in...
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7102347 |
Metallic contaminant detecting method and apparatus therefor
A metallic contaminant detecting method and apparatus according to the present invention detect metallic contaminants mixed in objects under inspection, such as food products, pharmaceuticals, and...
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7078894 |
Polishing device using eddy current sensor
An eddy current sensor and a method for detecting the thickness of a film formed on a substrate. The eddy current sensor, which is capable of stable operation, is operable to accurately detect a...
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7061236 |
Metal detector
A metal detector has a circular excitation coil ( 10 ) through which foodstuffs to be tested ( 65 ) pass, on a conveyor belt ( 40 ). The excitation coil ( 10 ) is excited by a stable oscillator (...
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7009389 |
Rotation angle detection device
A highly accurate rotation angle detection device is realized by correcting a detecting position error caused by a machining error such as deterioration of roundness of an internal diameter of a...
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6958603 |
Method for detecting metallic foreign matter and system for detecting metallic foreign matter
A metallic contaminant detecting method and apparatus according to the present invention detect metallic contaminants mixed in objects under inspection, such as food products, pharmaceuticals, and...
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6930478 |
Method for monitoring a metal layer during chemical mechanical polishing using a phase difference signal
A sensor for monitoring a conductive film in a substrate during chemical mechanical polishing generates an alternating magnetic field that impinges a substrate and induces eddy currents. The sensor...
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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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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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6859031 |
Apparatus and method for dynamic diagnostic testing of integrated circuits
Systems and methods consistent with principles of the present invention allow contactless measuring of various kinds of electrical activity within an integrated circuit. The invention can be used...
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6825655 |
Method and arrangement for detecting changes of a magnetic response in magnetic particles
A method for detecting changes of magnetic response of at least one magnetic particle provided with a external layer in a carrier fluid, comprising measuring the characteristic rotation time of the...
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6815957 |
Method and device for inspecting laminated iron cores of electrical machines for interlamination shorts
The present invention relates to a method, an apparatus and a computer program for inspecting laminated iron cores ( 1 ) of electrical machines for interlamination shorts, in which the laminated...
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6807497 |
Laser measurement system with digital delay compensation
A method and system for determining and compensating for phase and time errors in an optical receiver. The method and system includes use of a measurement and reference signal; deriving phase and...
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6764068 |
Document processing apparatus and method
A method of detecting undesired metal objects in a document feed path and a document processing apparatus that includes a feeder for transporting document sheets along a feed path; and a detector...
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6707295 |
Method for distinguishing between semi-soft and soft magnetic material
A method for distinguishing between a semi-soft magnetic material, having a magnetic saturation field H sub s ranging from 100A/m to 3000 A/m, and a soft magnetic material, having a magnetic...
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6672175 |
Apparatus and method for sensing an angle of relative rotation of rotors
A rotation sensor provided with a first rotor fixed to a shaft, a second rotor fixed to the same or other shaft and adjoining the first rotor, and a core having a resonance coil, arranged around...
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6583625 |
Metal detector and method in which mineralization effects are eliminated
Metal detector and method in which soil mineralization effects and responses to other undesired materials are eliminated. A periodic excitation signal is transmitted into an area where a target is...
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6559645 |
Detector apparatus and method
Transceiver and methods are included that are especially suitable for detecting metallic materials, such as metallic mines, within an environment. The transceiver includes a digital waveform...
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6541966 |
Precision metal locating apparatus
Apparatus for detecting a metal object comprises a transmitter for generating a pulsed or an alternating magnetic field in the vicinity of the metal object to be detected and a detector for...
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6479993 |
Method of detecting foreign matter and apparatus therefor
An apparatus for detecting the presence or absence of foreign matter in a product is provided which includes a reaction signal generating circuit 2 for outputting a reaction signal associated...
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6479989 |
Eddy current probe with an adjustable bisected sensing end
In accordance with the present invention there is provided an eddy current probe for the detection of defects within a structure. The probe has a sensing end with a coil disposed therein. The coil...
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6448764 |
Method of and apparatus for contactless planarity measurements on ferromagnetic metal strip
A method and apparatus for the contactless determination of planarity and a ferromagnetic metal strip during transit of the strip through a strip-processing line or cold-rolling line. Hysteresis...
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6424151 |
Method and apparatus for evaluation of eddy current testing signal
A method for evaluation of an eddy current testing signal is provided. The method includes the steps of generating a feature amount based on a sample eddy current testing signal obtained by...
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6421621 |
Metal detector target identification using flash phase analysis
A flash phase analysis circuit provides parallel phase channels for simultaneously analyzing a detected signal in each of several phase windows and providing parallel outputs indicating whether a...
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6396261 |
Scanning AC hall microscope
A scanning AC hall microscope and a method which measures the domain pattern of magnetic materials, such as magnetic storage media, by measuring the oscillatory motion of a domain boundary under...
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6377039 |
Method for characterizing coating and substrates
A system for characterizing coatings and substrates of a material under test. A sensor is positioned against a coated sample which is to be measured to obtain phase and magnitude measurements....
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6366083 |
Method for measuring the thickness of oxide layer underlying crud layer containing ferromagnetic material on nuclear fuel rods
A method for measuring the thickness of an oxide layer formed on the cladding surface of nuclear fuel rods and underlying a crud layer containing ferromagnetic material using eddy current lift-off...
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6281701 |
Apparatus for testing flat panel display
Apparatus for testing flat panel display (liquid crystal display) panel is disclosed herein. Testing apparatus for sending a plurality of electrical signals to a plurality of pads of a display...
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6252398 |
Apparatus and methods for obtaining increased sensitivity, selectivity and dynamic range in property measurement using magnetometers
Apparatus and methods are disclosed which provide increased sensitivity, selectivity and dynamic range for non-contact measurement of actual physical and/or kinematic properties of conducting and...
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6249119 |
Rotating electromagnetic field defect detection system for tubular goods
The defect detection system of the present invention includes an encircling coil for providing a saturating DC magnetic fields to tubular goods. Also included is an encircling drive coil for...
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6239593 |
Method and system for detecting and characterizing mechanical damage in pipelines using nonlinear harmonics techniques
A nondestructive method for inspecting steel pipelines for plastically deformed regions caused by mechanical damage to the pipeline. The invention is a method and system that uses nonlinear...
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6201391 |
Nonlinear harmonics method and system for measuring degradation in protective coatings
A system and method for nondestructive testing of a workpiece having a metallic protective coating utilizing nonlinear harmonics techniques to determine degradation within the metallic protective...
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6084403 |
Slim-hole collar locator and casing inspection tool with high-strength pressure housing
An inductive collar locator tool is provided that provides improved sensitivity and precision in locating collars and other discontinuities in a casing string. In a preferred embodiment, the collar...
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6019208 |
Bill validator for bank note having conductive strip
A device for validating the authenticity of a document uses changes in capacitance due to the presence of an electrically conductive security thread extending across the document. The device uses a...
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6005392 |
Method for the operation and for the evaluation of signals from an eddy current probe and device for performing the method
A method for the operation and for the evaluation of signals of an eddy cent probe wherein a transmitting coil is supplied with alternating current with preferably three frequency components. The...
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6002251 |
Electromagnetic-field-focusing remote-field eddy-current probe system and method for inspecting anomalies in conducting plates
An electromagnetic-field-focusing remote-field eddy-current probe for inspecting anomalies in a conducting plate. The probe is designed to have the electromagnetic energy released from an...
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5963035 |
Electromagnetic induction spectroscopy for identifying hidden objects
A spectrogram of secondary magnetic field strength as a function of frequency and spatial relationship is used to identify hidden objects. A time-varying multi-frequency primary electromagnetic...
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5963031 |
Method and apparatus for measuring the thickness of a non-ferromagnetic conductive layer on a ferromagnetic conductive substrate
Method, applicable to an object consisting of a substrate made of ferromagnetic electrically conductive material covered with a layer of a non-ferromagnetic electrically conductive coating, for...
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5963030 |
Pipe inspection apparatus and process
An openable ring assembly is externally centered around and moved parallel to the centerline of a stationary pipe. As a low-frequency EM source signal is applied to the ring assembly, the time...
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5936401 |
Device and process for measuring electrical properties at a plurality of locations on thin film superconductors
A device and process for determining the uniformity of a superconducting film's critical current density and transition temperature over a large area uses an array of ac coils placed in close...
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5929634 |
Device for sensing metallically conductive parts in an at least substantially non-conductive conveyor stream
A device is provided for generating a detection signal upon occurrence of metallically conductive parts in an at least substantially non-conductive conveyor stream in which device an...
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