|| List of recent Magnetic Field-related patents
|Devices, systems and methods for security using magnetic field based identification|
Devices, systems and methods are disclosed for determining an electromagnetic signature for authenticating a device, a user, and/or a location. In exemplary embodiments, a magnetometer captures an electromagnetic signature which is then compared with one or more authorized electromagnetic signatures.
|Method for determining an angle of a magnetic pole of a rotating object|
In various embodiments, a method may include: generating at least one time stamp based on detection of at least a first magnetic field event of at least one pole of a magnetic object during a first rotation; determining a model of the magnetic object based on the at least one time stamp, wherein the model describes a magnetic pattern caused by the first rotation of the magnetic object; generating at least one further time stamp based on detection of at least a second magnetic field event of the at the least one pole of the magnetic object during a second rotation; and updating the model based on the at least one further time stamp.. .
|Magnetic compensation circuit and method for compensating the output of a magnetic sensor, responding to changes in a first magnetic field|
A solution for compensating a magnetic field sensor to permit detection of a small magnetic field in the presence of a large magnetic field is disclosed. A magnetic field sensor detects the magnetic field which produces an analogue signal then encoded by an analogue to digital converter (adc) into a digital stream.
|Switched diverter circuits for minimizing heating of an implanted lead and/or providing emi protection in a high power electromagnetic field environment|
An energy management system that facilitates the transfer of high frequency energy induced on an implanted lead or a leadwire includes an energy dissipating surface associated with the implanted lead or the leadwire, a diversion or diverter circuit associated with the energy dissipating surface, and at least one non-linear circuit element switch for diverting energy in the implanted lead or the leadwire through the diversion circuit to the energy dissipating surface. In alternate configurations, the switch may be disposed between the implanted lead or the leadwire and the diversion circuit, or disposed so that it electrically opens the implanted lead or the leadwire when diverting energy through the diversion circuit to the energy dissipating surface.
|Manipulation of an untethered magentic device with a magnet actuator|
A method of manipulating an untethered magnetic device, such as a magnetic capsule endoscope, can include positioning a magnet actuator and an untethered magnetic device proximate one another such that the untethered magnetic device is within a constant magnetic field of the magnet actuator. A position of the untethered magnetic device can be determined relative to the magnet actuator.
|Method and apparatus for production of uniformly sized nanoparticles|
An apparatus and process for creating uniformly sized, spherical nanoparticles from a solid target. The solid target surface is ablated to create an ejecta event containing nanoparticles moving away from the surface.
|Magnetic annealing apparatus|
Disclosed is a magnetic annealing apparatus including a carrier conveyance region and a workpiece conveyance region. The carrier conveyance region includes: a first mounting table where a carrier is disposed; second mounting tables where carriers are disposed to convey workpieces from the carrier conveyance region to the workpiece conveyance region; a storage unit that stores carriers; and a carrier conveyance mechanism that performs carrying-out/carrying-in of the carriers.
|Gaming machine and reel device thereof|
A gaming machine includes: a reel having an outer circumferential surface on which symbols are lined up; a reel driving mechanism which rotates the reel to rearrange the symbols; a magnet which is provided in the reel driving mechanism to change an external magnetic field in accordance with the rotation of the reel; a magnetic force detecting mechanism which detects a magnetic force of the external magnetic field so as to output a magnetic force detection signal; a reel setting unit by which the magnetic force detection signal and arrangement positions of the symbols are associated with one another; and a reel drive control unit which controls the reel driving mechanism so that the symbols are rearranged in a predetermined arrangement based on the magnetic force detection signal and the arrangement positions of the symbols.. .
|Device and method for sensing magnetized objects for an electronic tag game|
An electronic tag game includes a system having magnetic field sensors that are to be worn by a player of the electronic tag game. The magnetic field sensors are configured to detect a change in the local magnetic field.
|Highly sensitive magnetic tunable heterojunction device for resistive switching|
The present invention discloses highly sensitive magnetic heterojunction device consisting of a composite comprising ferromagnetic (la0.66sr0.34mno3) lsmo layer with ultra-thin ferrimagnetic cofe2o4 (cfo) layer capable of giant resistive switching (rs) which can be tuned at micro tesla magnetic field at room temperature.. .
|Detection of surface-bound magnetic particles|
The invention relates to a method and a sensor device (100) for the detection of magnetic particles (1) bound to the binding surface (111) of a sample chamber (112), wherein said detection is made during and/or immediately after the action of an attractive magnetic field. Preferably, the attractive magnetic field (b) is preceded by a repulsive magnetic field (b) which removes unbound magnetic particles away from the binding surface (111).
|Device, systems and methods for analyzing a target analyte|
This disclosure is directed to a cap for obtaining a target analyte from a suspension. The cap introduces a magnetic field or a magnetic gradient to the tube to draw the target analyte bound to a particle to the cap.
|Physical removal of biological agents detected by a magnecytometer|
A system and method for analyzing a sample of liquid having an nmr signal in response to a magnetic field for the presence of an analyte. Included is an nmr device having a testing section that is adapted to contain a liquid and apply a magnetic field to the liquid.
|Integrated multi-step solid/liquid separation system for fischer-tropsch processes|
A system for separating liquids from solids comprising an immobilization unit comprising an immobilization vessel containing a bed of magnetizable material and a magnet configured to produce a magnetic field within the immobilization vessel, wherein the immobilization vessel further comprises an immobilization vessel outlet and an immobilization vessel inlet for a fluid comprising liquid and metal-containing particles. A method for separating solid particles from liquid by introducing a fluid comprising liquid and a first concentration of solid particles into an immobilization unit comprising an immobilization vessel and at least one magnet configured to produce high density magnetic flux lines within the immobilization vessel and/or a high field gradient at or near the surface of the magnetizable material when powered, wherein the immobilization vessel contains therein a bed of magnetizable material; and removing from the immobilization unit a product having a second particle concentration less than the first particle concentration..
|Generating magnetic field map for indoor positioning|
Disclosed is an apparatus caused to acquire information indicating a measured magnetic field vector and information relating to an uncertainty measure of the measured magnetic field vector in at least one known location inside the building, wherein the indicated magnetic field vector represents magnitude and direction of the earth's magnetic field affected by the local structures of the building, and to generate the indoor magnetic field map for at least part of the building on the basis of at least the acquired information and the floor plan.. .
|Waveguide circulator with improved transition to other transmission line media|
A waveguide circulator for an electro-magnetic field having a wavelength is provided. The waveguide circulator includes: n waveguide arms, where n is a positive integer; a ferrite element having n segments protruding into the n respective waveguide arms; at most (n−1) quarter-wave dielectric transformers attached to respective ends of at most (n−1) other segments; a first quarter-wave dielectric transformer attached to an end of the first segment; and a coaxial-coupling component.
|Bucking circuit for annulling a magnetic field|
A method and apparatus is provided for bucking a magnetic field of known geometry and time variation by means of a plurality of bucking loops. It utilizes multiple loops, each of which is energized by an electric current that creates a magnetic field of the known time variation.
|Shielding for a magnetic resonance tomography device and magnetic resonance tomography device equipped therewith|
A shielding for a magnetic resonance tomography device, in the form of a shell of a cylinder, for arrangement radially between a radially outer gradient coil system for generating a magnetic field gradient in an examination space of the mrt device and a radially inner rf coil system for sending and/or receiving rf signals into the examination space and from the examination space, is provided. The shielding includes strips that are arranged on a shielding surface, are electrically conductive and are separated from one another by slits.
|Auto recovering protection of electromechanical components in a high magnetic field|
An apparatus (100) protects a device (80) which has a ferrous electromechanical component which saturates in a high magnetic field (40) and draws a dangerously high electric current. A current sensor (110) senses current in excess of safe operating conditions of the protected device (80) in or near the magnetic field (40).
|High-isolation transmit/receive surface coils and method for epri|
The present invention provides an apparatus and a corresponding method useful for electron paramagnetic resonance imaging, in situ and in vivo, using high-isolation transmit/receive (tx/rx) coils, which, in some embodiments, provide microenvironmental images that are representative of particular internal structures in the human body and spatially resolved images of tissue/cell protein signals responding to conditions (such as hypoxia) that show the temporal sequence of certain biological processes, and, in some embodiments, that distinguish malignant tissue from healthy tissue. In some embodiments, the tx/rx coils are in a surface, volume or surface-volume configuration.
|Nuclear magnetic resonance rock sample analysis method and instrument with constant gradient field|
The present invention relates to a constant gradient field nuclear magnetic resonance (nmr) rock sample analysis method and instrument. The method includes: in a constant gradient magnetic field, performing nmr measurement to acquire data; converting the measured nmr data into a two-dimensional nmr spectrum d-t2; performing measurement and inversion on a standard sample of a constant gradient field to obtain a standard sample two-dimensional nmr spectrum d-t2; measuring the sample to acquire a two-dimensional nmr spectrum d-t2 of a fluid in the sample; identifying fluid types according to the practically measured two-dimensional nmr spectrum d-t2; computing the fluid property and the petrophysical parameters according to the two-dimensional nmr spectrum d-t2 of the fluid in the sample; performing single slice scanning on the sample to acquire partial oil and water saturation; performing continuous slice scanning to obtain axial oil and water saturation distribution and movable fluid saturation distribution of the sample..
|Fluxgate magnetic-to-digital converter with oversampling closed loop|
A fluxgate sensor including a magnetic-to-digital converter (mdc) can be adapted to measure an external magnetic field bext with a bandwidth fb. The mdc forward path can include: (a) converting an analog sense signal from the fluxgate sense coil to corresponding oversampled digital data using an oversampling data converter with an oversampling frequency fs greater than fb; and (b) loop filtering the oversampled digital data, synchronous with the oversampling frequency fs, to generate the loop output digital data.
|Detection circuit, semiconductor integrated circuit device, magnetic field rotation angle detection device, and electronic device|
Detection of the rotation angle of a magnetic field using a magnetic sensor in which two sensor units are arranged at a predetermined angle with respect to each other is performed with a resolution of an angle smaller than 45° with a simple circuit configuration. A detection circuit is connectable to a magnetic sensor in which first and second sensor units are arranged, at a predetermined angle with respect to each other, each sensor unit having a bridge circuit of magnetoresistance elements.
|Angle measurement system including magnet with substantially square face for through-shaft applications|
To make the magnetic field lines straighter and more parallel to one another, the present disclosure makes use of substantially square magnets with through-holes therein. It will be appreciated that “substantially square” magnets include magnets that are precisely square as well as magnets that are approximately square (e.g., have rounded corners or other small deviations from being square.) by providing straighter and more parallel magnetic field lines, such substantially square magnets tend to enable greater precision and accuracy when rotational angles of a shaft are measured..
|Method for detecting changes of position of shaftless spinning rotor of open-end spinning machine in cavity of active magnetic bearing and spinning unit of open-end spinning machine with active magnetic bearing for bearing shaftless spinning rotor|
The invention relates to a method for detecting changes of position of a shaftless spinning rotor (1) of an open-end spinning machine in a cavity of an active magnetic bearing, in which the position of the spinning rotor (1) is detected by a system of sensors (a, b) and on basis of the detected changes in the position of the spinning rotor (1) is adjusted controlling of the active magnetic bearing in order to eliminate undesirable changes in the position of the spinning rotor (1) in the cavity of the active magnetic bearing. Continuously is detected radial shifting of the spinning rotor (1) and simultaneously is continuously detected inclination of the spinning rotor (1), whereupon according to the detected changes in the position of the spinning rotor (1) is determined shifting and/or inclination of the spinning rotor (1) which is used for subsequent adjustment of the controlling of position of the spinning rotor (1) in the active magnetic bearing.
|Self-calibrating magnetic field monitor|
A self-calibrating magnetic field monitor is disclosed. In one embodiment, a magnetic field sensor repeatedly generates an electronic signal related to the magnetic field.
|Magnetic coil / transformer modulation|
A communication system with ssl light bulb assemblies comprises a first and a second transceiver. The first transceiver comprises a magnet, and the second transceiver comprises a switched-mode power converter which comprises an inductor element with an inductor core material having a magnetic field dependent permeability.
|Permanent magnet electric motor|
According to one embodiment, a rotor is configured by a rotor core and magnetic poles. Two or more types of permanent magnets are used such that each product of coercivity and thickness in the magnetization direction becomes different.
The earth's magnetic field has not been mined as a source of energy for electric vehicles. With average field strength of 0.5 tesla around the world it is easy to understand why it has been overlooked.
|Method for correcting variations of parameters of components and/or of assembly of active magnetic bearing and active magnetic bearing for bearing rotating working means|
The invention relates to a method for correcting variations of parameters of components of active magnetic bearing and/or assembly of active magnetic bearing as a whole. At the latest before starting to operate the active magnetic bearing are detected mechanical and/or electrical and/or installation variations and/or other variations of parameters of at least one component of the active magnetic bearing and/or of the whole active magnetic bearing assembly, whereupon the detected variations and/or correction values based on the variations are recorded in memory (m), which is an integral part of the active magnetic bearing assembly, and subsequently these variations and/or correction values are used from the memory (m) for adjustment of system for detecting position of the rotating working means in the active magnetic bearing during operation of the active magnetic bearing.
|Linear motor with contactless energy transfer|
An integrated electromagnetic energy conversions device is provided that includes a synchronous or brushless linear (sobl) motor, and a transformer, where the transformer is integrated electromagnetically and topologically with the sobl motor, where an electromagnetic field orientation of the transformer is perpendicular to an electromagnetic field orientation of the sobl motor, where a magnetic-field decoupling between the sobl motor and the transformer is provided and a position independent magnetic coupling of the transformer is provided, where the integrated sobl motor and the transformer operate simultaneously in a motor and transformer mode.. .
|Device and method for generating a corrective magnetic field for ferrite-based circuits|
A demagnetizing device includes, in one embodiment, a demagnetizer. The demagnetizer is operable to generate a corrective magnetic field.
|Lens for electron capture dissociation, fourier transform ion cyclotron resonance mass spectrometer comprising the same and method for improving signal of fourier transform ion cyclotron resonance mass spectrometer|
A lens for electron capture dissociation may include: a first electrode and a second electrode spaced apart from each other and arranged along a first direction; and a third electrode and a fourth electrode spaced apart from each other and arranged along a second direction perpendicular to the first direction. The first electrode and the second electrode may be disposed in a space in which a magnetic field is formed in the first direction and trap electrons.
|Magnetic annealing apparatus|
Disclosed is a magnetic annealing apparatus which performs a magnetic annealing on workpieces held in a workpiece boat by using a horizontal superconducting magnet as a magnetic field generating unit. The magnetic annealing apparatus includes a carrier configured to accommodate the workpieces before the magnetic annealing process; and a workpiece conveyance mechanism configured to convey the workpieces held in the carrier to the workpiece boat.
|Switch for direct current operation having at least one circuit breaker chamber|
A switch for, in particular, direct current operation, having at least one circuit breaker chamber, each circuit breaker chamber having two contact pieces having respectively a first contact area, an electrically conductive bridge circuit which can be moved by means of a contact bridge and which has two contact regions for establishing an electrically conductive connection between the first and second contact regions and for separating at least one of the two contact regions from the respective first contact region, in addition to at least two magnets for generating a magnetic field.. .
|Tool box system|
A tool box system. One or more magnets are strategically oriented, aligned, and sized to attract and secure the various types of tools within the tool box.
|Filters for blocking macroparticles in plasma deposition apparatus|
This disclosure provides systems, methods, and apparatus related to blocking macroparticles in deposition processes utilizing plasmas. In one aspect, an apparatus includes a cathode, a substrate holder, a first magnet, a second magnet, and a structure.
|Non-ferrite structures for inductive power transfer|
An inductive power transfer apparatus suitable for producing a magnetic field for inductive power transfer is disclosed. The apparatus has three or more coils arranged such that when energised with a power source, magnetic fields produced by each coil augment each other on a first surface and substantially weaken each other on a second surface.
|Electric wire and coil|
A electric wire includes a central conductor 1 made of aluminum or an aluminum alloy, a cover layer 2 made of copper and covering the central conductor 1, and a ferromagnetic layer 3 covering the cover layer 2 and blocking the external magnetic field. The thickness of the ferromagnetic layer 3 is in a range from 0.04 μm to 14 μm, the total diameter of the central conductor 1 and the cover layer 2 is in a range from 0.05 mm to 0.4 mm, and the cross-sectional area of the central conductor 1 is in a range from 85% to 95% of the total cross-sectional area of the central conductor 1 and the cover layer 2..