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3455 results about "Magnetic sensing" patented technology
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Magnetic sensors. Magnetic sensors are used for the detection of positions without contact or wear and tear. They are used where very long sensing ranges are required. Since magnetic fields penetrate all non-magnetisable materials, the sensors can detect magnets through walls made of stainless steel, aluminium, plastic or wood.
Electro-magneto volume tomography system and methodology for non-invasive volume tomography
InactiveUS20180325414A1Maximize surface areaMaximize number of turnReconstruction from projectionMaterial analysis by electric/magnetic meansCapacitanceImage resolution
A system and method capable of performing multiple types of non-invasive tomographic techniques. The system is capable, via electronic control, of detecting and imaging materials within a volume using electrical capacitance, displacement phase current, magnetic inductance, and magnetic pressure sensing. The system is also able to control the amplitude, phase, and frequency of individual electrode excitation to increase imaging resolution and phase detection. This allows many dimensions of non-invasive data to be captured without the need for multiple instruments or moving parts, at a high data capture rate.
Owner:TECH4IMAGING
Magnetic induction signal repeater
ActiveUS8457547B2Near-field transmissionFrequency-division multiplex detailsAudio power amplifierResonance
A magnetic induction (MI) repeater includes first and second coils configured to have the same resonance frequency and to be substantially isolated from one another, and an amplifier connected to the first and second coils and configured to receive a signal induced in the first coil by a first magnetic field and output, via the second coil, a second magnetic field based on the signal, wherein the second magnetic field is amplified relative to the first magnetic field.
Owner:COCHLEAR LIMITED
Device for measuring the motion of a conducting body through magnetic induction
InactiveUS6850053B2Improve cooling effectReduce thermal noiseAcceleration measurement using interia forcesMagnetic-field-controlled resistorsMeasurement deviceClassical mechanics
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 area of the moving body. Two or more measuring devices are arranged outside the magnetic field to measure a measurement magnetic field that is induced by electrical currents in the moving body. The measuring devices are arranged essentially symmetrically with respect to the magnetic field generating means or the moving body. The measurement magnetic field represents at least one motion variable of the moving body. The measuring device is thereby no longer subjected to the temperature-dependent variations of the exciting field.
Owner:SIEMENS AG
Electromagnetic sensing touch screen
InactiveUS9158427B1Accurate detectionImprove stability and precisenessUsing electrical meansElectrical appliancesCapacitanceDigital potentiometer
The present invention discloses an electromagnetic sensing touch screen, which includes a display panel, a sensing capacitor matrix, select units, voltage controlled oscillators (VCOs), digital potentiometers, EM (electromagnetic) wave receive / detection units, a standard EM wave transmit unit and a control unit. A single detection unit consists of a corresponding select unit, VCO, digital potentiometer and EM wave receive / detection unit. The control unit drives the standard EM wave transmit unit to transmit standard EM wave, and further controls the EM wave receive / detection units to receive sensed capacitance values from the sensing capacitor matrix in a scanning manner. As a result, each EM wave receive / detection unit generates a respective detection signal for determining the location of the finger(s) and checking how the finger(s) approaches to or actually touches the sensing capacitor matrix, thereby generating finger location information and implementing the multipoint touch and display function.
Owner:NETIO TECH
Mobile robot platform and method for sensing movement of the same
A mobile robot platform and a method for sensing movement of the same are disclosed, which utilize two omni-directional meter wheels perpendicular to each other and a magnetic sensing module for detecting a moving condition of the platform moving on a planar surface while transmitting the detected moving condition to a signal processing unit to calculate the position, velocity, angular position and angular velocity of the platform.
Owner:IND TECH RES INST
System and method for capturing dose information
A system for capture of dose delivery information is provided. The system includes a medication delivery device, a dose information capture device adapted to be attached to the medication delivery device, and a target element adapted to be attached to the medication delivery device. The target element comprises a magnet or ferrous element and the target element attaches to the medication delivery device on a dose delivery mechanism of the medication delivery device. The dose information capture device includes a magnetic position sensor adapted to detect a position of the target element. As an alternative to magnetic sensing, MEMS flow sensors, and the like may also be used. Exemplary systems preferably transmit dose information in real time to remote devices for further processing.
Owner:BECTON DICKINSON & CO
GMR magnetic sensing element having an antiferromagnetic layer extending beyond the track width and method for making the same
InactiveUS7050276B2Easy to disassembleHigh outputNanomagnetismMagnetic measurementsMagnetic layerAntiferromagnetism
A magnetic sensing element with improved magnetic detection output and a method for making the same are provided. In the magnetic sensing element, the length of an upper pinned magnetic layer an upper antiferromagnetic layer in a track width direction is larger than the length of a free magnetic layer in the track width direction. In making the magnetic sensing element, there is no need to remove side portions of the upper pinned magnetic layer and the upper antiferromagnetic layer. The materials of the upper pinned magnetic layer and the upper antiferromagnetic layer are thus prevented from redepositing on two side faces of the free magnetic layer during milling.
Owner:TDK CORPARATION
System and method using magnetic anomaly field magnitudes for detection, localization, classification and tracking of magnetic objects
InactiveUS7932718B1Easy to detectImprove classificationMagnetic gradient measurementsElectric/magnetic detectionMagnetic dipoleGradiometer
A magnetic anomaly sensing system and method uses at least four triaxial magnetometer (TM) sensors with each of the TM sensors having X,Y,Z magnetic sensing axes. The TM sensors are arranged in a three-dimensional array with respective ones of the X,Y,Z magnetic sensing axes being mutually parallel to one another. The three-dimensional array defines a geometry that forms at least one single-axis gradiometer along each of the X,Y,Z magnetic sensing axes. Information sensed by the TM sensors is to generate scalar magnitudes of a magnetic anomaly field measured at each of the TM sensors, comparisons of the scalar magnitudes to at least one threshold value, distance to a source of the magnetic anomaly field using the scalar magnitudes when the threshold value(s) is exceeded, and a magnetic dipole moment of the source using the distance.
Owner:USA AS REPRESENTED BY THE SEC OF THE NAVY THE
Magnetic sensing element with side shield layers
InactiveUS6980403B2Minimized increaseAvoid readingNanomagnetismMagnetic measurementsComposite filmElectrical and Electronics engineering
A magnetic sensing element of a current-perpendicular-to-plane (CPP) type that minimizes an increase in effective read track width and prevents side reading is provided. The magnetic sensing element includes a composite film, an upper shield layer, a lower shield layer, and side shield layers. The side shield layers are disposed at the two sides of the composite film in the track width direction between the lower shield layer and the upper shield layer.
Owner:TDK CORPARATION
Microminiature power converter
ActiveUS6930584B2Multiple-port networksConversion constructional detailsElectrical conductorSemiconductor
A microminiature power converter includes a semiconductor substrate on which a semiconductor integrated circuit is formed, a thin film magnetic induction element, and a capacitor. The thin film magnetic induction element includes a magnetic insulating substrate, and a solenoid coil conductor in which a first conductor is formed on a first principal plane of the magnetic insulating substrate, a second conductor is formed on a second principal plane of the magnetic insulating substrate, and a connection conductor is formed in a through hole passing through the magnetic insulating substrate are connected. A relationship of a length L of the magnetic insulating substrate in a direction vertical to a magnetic field generated by the solenoid coil and a length d of the coil conductor is d≧L / 2.
Owner:FUJI ELECTRIC CO LTD
Current Measuring Apparatus
ActiveUS20090121704A1Adverse effect of currentReduce adverse effectsMeasurement using dc-ac conversionVoltage/current isolationElectricityHall element
The present invention provides a current measuring apparatus having an improved structure to inhibit the possible adverse effect of a current in a different phase and the possible generation of an induced electromotive force caused by a measurement target current, enabling the measurement target current to be accurately detected even with the small size of the apparatus. The current measuring apparatus includes a printed circuit board 1 having Hall elements 2a, 2b and a signal processing integrated circuit 3 mounted thereon, the Hall elements 2a, 2b sensing a magnetic field generated by a current flowing through a current measurement target bus bar 4a, the signal processing integrated circuit 3 processing sensing outputs from the Hall elements 2a, 2b to calculate a value for the current flowing through the bus bar 4a. Magnetic sensing surfaces of the Hall elements 2a, 2b are arranged substantially perpendicularly to the direction of the magnetic field generated by the current flowing through the bus bar 4a. Further, the printed circuit board 1 is fixed to the bus bar 4a so that a circuit board surface of the printed circuit board 1 having a wire electrically connecting the Hall elements 2a, 2b to the signal processing integrated circuit 3 is positioned substantially parallel to the direction of the magnetic field.
Owner:ASAHI KASEI ELECTRONICS CO LTD
Battery charging pad employing magnetic induction
InactiveUS20100315038A1Improve accuracySimple circuit structureTransformersMobile unit charging stationsLocation detectionBattery charge
The battery charging pad comprises a moving mechanism 13 that moves the transmitting coil 11, and a position detection controller 14 that detects the position of a device housing a battery 50 and controls the moving mechanism to move the transmitting coil in close proximity to a receiving coil 51. Pulse signals are supplied to a plurality of position detection coils 30 from a pulse generator 31, and the echo signals are a result of coil excitation by the pulse signals. The battery charging pad position detection controller 14 detects the position of the receiving coil 51 and moves the transmitting coil 11 in close proximity to the receiving coil 51, and the position detection controller 14 detects the position of the transmitting coil 11 and moves the transmitting coil 11 to the reference position, or it moves the transmitting coil 11 in close proximity to the receiving coil 51.
Owner:SANYO ELECTRIC CO LTD
Rotational angle sensing device and assembling method thereof
ActiveUS20050253578A1Convenient ArrangementMagnetic-field-controlled resistorsSolid-state devicesHall elementMagnetic flux
A magnet is provided to one of two members, which make relative rotation therebetween. First and second Hall elements are arranged adjacent to each other and are provided to the other one of the two members. A magnetic sensing surface of the first Hall element is generally perpendicular to a magnetic sensing surface of the second Hall element, and a relative rotational angle between the two members is determined through the first and second Hall elements based on a magnetic flux, which is generated by a magnetic flux generating portion of the magnet and passes through the first and second Hall elements toward a magnetic flux attracting portion of the magnet.
Owner:DENSO CORP
Receiver and method for retrieving an information signal from a magnetic induction signal
ActiveUS20120281843A1Reduce power consumptionWithout compromising quality of communication signalHearing device energy consumption reductionNear-field systems with structural receiverImage resolutionBand-pass filter
A receiving antenna circuit is arranged in a reactive near-field of a modulated magnetic induction signal and forms a narrow band-pass filter. The output of the antenna circuit is not subjected to any frequency translation prior to digitising, and the signal may nevertheless be digitised with low resolution, which radically reduces the power consumption of the receiving circuits. The reduction in power consumption is of several orders of magnitude, which allows implementation of such receiving circuits in battery-driven devices such as hearing devices without substantially affecting the battery life.
Owner:OTICON
Optically pumped atomic magnetometer and magnetic sensing method
ActiveUS20160061913A1Electric/magnetic detectionMeasurements using magnetic resonanceLight beamOptic system
Provided is an optically pumped atomic magnetometer that can separate and acquire magnetic information of spatially different places at the same time by one probe beam. The optically pumped atomic magnetometer includes a cell containing alkali metal atoms, a pump beam optical system introducing pump beams including circularly polarized light component to different locations of the cell, a probe beam optical system introducing a probe beam including linearly polarized light component to the cell, a detection unit detecting a signal reflecting a rotation angle of a plane of polarization of the probe beam after intersecting with the pump beams, and an information acquisition unit acquiring information related to a magnetic field intensity of each of the different locations from the detected signal. The pump beam optical system includes a modulation unit modulating the pump beams so that one of frequencies and phases of the pump beams is different.
Owner:CANON KK
Micromachined magnetic field sensors
ActiveUS20120007598A1Improve sensor sensitivityReduce sensor offsetSolid-state devicesMagnetic field measurement using galvano-magnetic devicesElectricityMagnetic flux
A micromachined magnetic field sensor integrated with electronics is disclosed. The magnetic field sensors utilize Hall-effect sensing mechanisms to achieve 3-axis sensing. A Z axis sensor can be fabricated either on a device layer or on a conventional IC substrate with the design of conventional horizontal Hall plates. An X and Y axis sensor are constructed on the device layer. In some embodiments, a magnetic flux concentrator is applied to enhance the performance of the magnetic field sensor. In some embodiments, the magnetic field sensors are placed on slope sidewalls to achieve 3-axis magnetic sensing system. In some embodiments, a stress isolation structure is incorporated to lower the sensor offset. The conventional IC substrate and device layer are connected electrically to form a 3-axis magnetic sensing system. The magnetic field sensor can also be integrated with motion sensors that are constructed in the similar technology.
Owner:INVENSENSE
Electronic cigarette and electronic smoking set
InactiveCN101524187AImprove stabilityImprove securityTobacco devicesControl electronicsElectronic switch
The invention relates to an electronic cigarette and an electronic smoking set thereof. The electronic smoking set comprises a smoking barrel, a cigarette holder connected at the end of the smoking barrel and a battery arranged in the smoking barrel, the end of the smoking barrel is provided with a smoke bomb groove for storing smoke solutions, an electronic atomizer is arranged in the smoking barrel in front of the smoke bomb groove, which is close to the smoke bomb groove; a power end of the electronic atomizer in the smoking barrel is connected with an electronic switch, wherein, the electronic switch comprises an elastic diaphragm subjected to deformation while sniffing and smoking with the cigarette holder, a magnetic sheet arranged at the center of the elastic diaphragm and a control circuit board arranged in front of the elastic diaphragm for inducing the distance from the magnet block so as to control the power make-and-break of the electronic atomizer; the control circuit board is provided with a control circuit which comprises a magnetic conduction control chip and a switch element; the battery, the electronic atomizer and the switch element are in turn connected in series to form a circuit; and the switch element has a switch control end connected with the magnetic conduction control chip.
Owner:WANJIA TONGDA TECH BEIJING
Angular sensor with a magneto-electric transducer and a magnetic deflection device
InactiveUS7030606B2Magnetic-field-controlled resistorsSolid-state devicesUltrasonic sensorTransducer
An angular sensor which enables to obtain an output signal proportional to a relative rotational angle with low manufacturing cost and with miniaturized size. An angular sensor which includes a first magnet and a second magnet fixed to a rotation body, magnetic flux sensing surface is fixed to the stator to be positioned in magnetic field between the first magnet and the second magnet and perpendicular to magnetic sensing direction for sensing a magnetic flux, a magneto-electric transducer element for outputting an electric signal corresponding to a magnetic sensing direction element of the magnetic density, deflection yokes. The deflection yokes are positioned facing the magnetic flux sensing surfaces. The deflection yokes are positioned within a range of three quarters of a distance between the first magnet and the second magnet in X-axis direction and one half of a distance between the first magnet and the second magnet in Y-axis direction.
Owner:AISIN SEIKI KK
Magnetic sensing device including a sense enhancing layer
A magnetic sensor includes a sensor stack having a first magnetic portion, a second magnetic portion, and a barrier layer between the first magnetic portion and the second magnetic portion. At least one of the first magnetic portion and the second magnetic portion includes a multilayer structure having a first magnetic layer having a positive magnetostriction adjacent to the barrier layer, a second magnetic layer, and an intermediate layer between the first magnetic layer and the second magnetic layer. The magnetic sensor has an MR ratio of at least about 80% when the magnetic sensor has a resistance-area (RA) product of about 1.0 Ω·μm2.
Owner:SEAGATE TECH LLC
Magnetic sensing device, method of forming the same, magnetic sensor, and ammeter
ActiveUS7248045B2Suppressing appearanceInduction stabilityNanostructure applicationNanomagnetismHysteresisCurrent sheet
Owner:TDK CORPARATION
Transmission lines and components with wavelength reduction and shielding
InactiveUS6950590B2Reduce couplingReduce energy lossCoupling light guidesDelay linesWave structureMetal strips
A slow-wave transmission line component having a slow-wave structure. The slow-wave structure includes a floating shield employing one of electric and magnetic induction to set a potential on floating strips of said floating shield to about 0, thereby reducing losses caused by electric coupling to a substrate. A spacing between the strips is small to inhibit electric field from passing the metal strips to the substrate material.
Owner:CHEUNG TAK SHUN +1
Electric pressure cooker
ActiveCN108968669AControl relief pressureEasy to control the pressure reliefCooking vesselsMagnetic tension forceEngineering
The invention provides an electric pressure cooker. The electric pressure cooker comprises a cooker body, a cooker lid, an elastic pressure limiting assembly, a magnetic sensing part and a magnetic control device; the cooker body is used for containing cooked food; the cooker lid is arranged on the cooker body and provided with an exhaust port communicated with the interior of the cooker body; theelastic pressure limiting assembly is arranged at the exhaust port and comprises a movable plug and an elastic part matched with the plug, and the elastic part applies elastic force in the directionof the exhaust port to the plug; the magnetic sensing part is arranged on the plug, and the magnetic control device attracts or repulses the magnetic sensing part to apply magnetic force in the direction deviate from the exhaust port to the plug, and changes the relief pressure of the cooker body by changing the magnitude of the magnetic force. According to the electric pressure cooker, the problem in the prior art that the relief pressure of an electric pressure cooker is uneasy to control can be effectively solved.
Owner:ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
System and method for capturing dose information
A system for capture of dose delivery information is provided. The system includes a medication delivery device, a dose information capture device adapted to he attached to the medication delivery device, and a target element adapted to be attached to the medication delivery device. The target element comprises a magnet or ferrous element and the target element attaches to the medication delivery device on a dose delivery mechanism of the medication delivery device. The dose information capture device includes a magnetic position sensor adapted to detect a position of the target element. As an alternative to magnetic sensing, MEMS flow sensors, and the like may also be used. Exemplary systems preferably transmit dose information in real time to remote devices for further processing,
Owner:BECTON DICKINSON & CO
Antenna system for near-field magnetic induction wireless communications
ActiveUS20170263376A1Loop antennas with ferromagnetic coreNear-field transmissionElectrical batteryEngineering
An antenna system is provided that is capable of transmitting and receiving using near-field magnetic induction (NFMI). The antenna system includes a non-magnetic metallic core, a ferrite shield, and at least one electrically conducting winding. The ferrite shield is positioned between the non-magnetic metallic core and the electrically conducting winding. The non-magnetic metallic core may be a battery. The ferrite material forms a low impedance path for the magnetic field lines and increases inductance, thus providing increased energy efficiency and transmission quality. The antenna system is suitable for use in space constrained battery powered devices, such as hear instruments including hearing aids and earbuds.
Owner:NXP BV
Dual stripper rubber cartridge with leak detection
A rotating control drilling device includes an upper sealing element and a lower sealing element positioned around a drillstring and forming a chamber therebetween and a leak detection device. The leak detection device includes a piston in communication with the chamber, a magnet disc disposed on an end of the piston, and a plurality of magnetic sensors arranged in a magnetic sensing ring around the rotating control drilling device. Upon reaching a selected critical pressure in the chamber, a spring is configured to compress as the magnet disc is positioned proximate to the plurality of magnetic sensors. Furthermore, a method to detect leaks in a rotating control device includes positioning a leak detection device in communication with a chamber located between upper and lower sealing elements and signaling with the leak detection device when a pressure of the chamber exceeds a selected critical pressure.
Owner:SMITH INT INC
Wireless sensor network system and detection method utilizing huge magneto-resistance magnetic-sensing technology for detecting vehicle information
InactiveCN101236697ARealize the function of countingAvoid damageRoad vehicles traffic controlInterference resistanceWireless sensor networking
A wireless sensor network system using GMR magnetic sensitive technology to detect vehicle information of the invention consists of two GMR sensor detecting end machines and a wireless receiving end machine. The two GMR sensor detecting end machines are connected with the wireless receiving end machine. The detection method of the invention detects information such as vehicle speed, vehicle length, driving direction, vehicle flow, lane occupancy ratio, etc., according to change data of the surrounding ground magnetic field sensed by the GMR sensor when the vehicles pass. The wireless sensor network system is characterized in having high precision of detecting speed, adaptability to various roads, low cost, convenient maintenance and high anti-interference ability and causing small destroy to road surface, etc.
Owner:JIAXING WIRELESS SENSOR NETWORKS CENT CAS
Manufacturing method of Fe-6.5Si alloy powder and manufacturing method of magnetic powder core
The making of Fe-6.5Si alloy magnetic powder core comprises grain proportion, alloy powder inactivating, adding insulation agent to the metal powder, binder, lubricant and stripping agent, compression, heat treatment, solidification, surface coating, with the inactivating treatment getting phosphopyruvic acid with 5-15% phosphate chrome, the rest being acetone, adding alloy powder with 2-6% of mass percentage. Adding small quantity Ti nor Ni, it can reach the saturated alloy magnetic sensing strength BS value of 16000- 18000 Gaussian, coercitive force <=80A / m. It has better forming and compression feature. It reduces broken stress. The made magnetic powder core having magnetic conductivity of 125, with low metal core consumption.
Owner:武汉欣达磁性材料有限公司
Atomic magnetometer and magnetic sensing method
ActiveUS8405389B2High-sensitivity sensorMagnetic field measurement using magneto-optic devicesMagnetic gradient measurementsLight beamAtomic magnetometer
An atomic magnetometer includes a light source for a probe beam and a medium in which the probe beam is to be propagated. The medium is a substance which changes a polarization rotation angle of the probe beam depending on a magnetic field intensity at a first measurement position and a magnetic field intensity at a second measurement position different from the first measurement position. The atomic magnetometer directly measures a difference between the magnetic field intensity at the first measurement position and the magnetic field intensity at the second measurement position as a difference in polarization rotation angle, along a propagation path of the probe beam.
Owner:CANON KK
Intra-body communication apparatus provided with magnetic induction wireless communication circuit performing wireless communications using magnetic induction
InactiveUS20140213184A1Reduce power consumptionSimple configurationNear-field transmissionResonanceCommunication circuits
An intra-body communication apparatus includes an antenna coil configured to wirelessly communicate a magnetic induction signal with communication equipment by using magnetic induction at a carrier frequency, an electrode for a human body, the electrode connected to the antenna coil, and a resonance circuit including the antenna coil. The resonance circuit resonates at the carrier frequency. The intra-body communication apparatus is configured to transmit the magnetic induction signal from the communication equipment received by the antenna coil to the human body via the resonance circuit at the carrier frequency, without converting or changing a frequency of the magnetic induction signal.
Owner:PANASONIC HEALTHCARE HLDG CO LTD
Partial discharge detection apparatus and detection method of electrical rotating machine
InactiveUS20070139056A1High detectionHigh sensitivityTesting dielectric strengthElectric switchesLine sensorEngineering
A partial discharge detection apparatus of an electrical rotating machine includes a metal frame connected to a stator frame of the electrical rotating machine, a power line connected to one of a stator winding corresponding to one phase of three phases in the metal frame and a neutral point lead line connected to a neutral point of three-phase stator windings and arranged in the metal frame to propagate a partial discharge signal generated by degradation of the stator winding, a sensor including a rod antenna which is installed around the power line or neutral point lead line in the metal frame to electrostatically and magnetically induce the partial discharge signal propagated to the power line or neutral point lead line, and a detector which receives, via a signal lead line, a signal generated in the sensor and detects partial discharge by signal processing.
Owner:KK TOSHIBA
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