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7622918 |
Solenoid magentometer
A magnetometer assembly ( 22 ) for a torque transducer ( 10 ) includes inner and outer coils ( 34,38,36,40 ) wrapped and supported on a bobbin assembly ( 22 ). The bobbin assembly ( 22 ) includes...
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7557571 |
Fluxgate sensor integrated in semiconductor substrate and method for manufacturing the same
A fluxgate sensor is integrated in a semiconductor substrate. The fluxgate sensor has two bar type soft magnetic cores, or a rectangular-ring type soft magnetic core to form a closed magnetic path...
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7535221 |
Magnetic sensor element and electronic directional measuring device
A magnetic sensor element of a flux gate type comprising a magnetism sensitive part ( 8 a ) formed by winding a coil ( 3 ) around a magnetic core layer ( 8 ), and magnetism collective part ( 8 b )...
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7528606 |
Coupled nonlinear sensor system for sensing a time-dependent target signal and method of assembling the system
A coupled non-linear sensor system is provided for sensing a non-sinusoidal time-dependent target signal. The system comprises an odd number, other than one, of interconnected oscillatory sensors...
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7477050 |
Magnetic sensor having a coil around a permeable magnetic core
A differential wireless sensing device includes a first resonant device impinged on a substrate having a predetermined natural frequency, the first resonant device having a changeable resonant...
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7420366 |
Coupled nonlinear sensor system
A sensor system employing a plurality of nonlinear sensors utilizes a coupling network to interconnect the sensors wherein the coupling network inherently induces oscillations in the sensor system....
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7414399 |
Micromagnetometer of the fluxgate type with improved excitation coil
The invention relates to a fluxgate micromagnetometer implemented in thin layers, fitted with at least one excitation coil with an arrangement and a structure that bring improvements particularly...
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7407596 |
Fluxgate sensor integrated in printed circuit board and method for manufacturing the same
A fluxgate sensor is integrated in a printed circuit board. The fluxgate sensor has two bar-type (or rectangular-ring shaped) soft magnetic cores to form a closed magnetic path on a printed circuit...
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7405561 |
Reduced power sensing apparatus having fluxgate and control method thereof
A sensing apparatus includes a fluxgate module which outputs an analog signal corresponding to terrestrial magnetism using a fluxgate having a magnetic substance core and a driving coil, and an...
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7391211 |
Digital fluxgate magnetometer
A circuit for a fluxgate magnetometer includes a plurality of digital function blocks that are programmed as functions within a microcontroller. The microcontroller includes and implements the...
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7391210 |
Integrated fluxgate-induction sensor
An integrated fluxgate-induction sensor is formed of a combined fluxgate sensor and induction sensor using a common core. The sensor may be in serial operation where it switches between a fluxgate...
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7382123 |
Micro fluxgate sensor and method of manufacturing the same
A micro-machining method of manufacturing a micro fluxgate sensor manufactured having an amorphous magnetic core includes forming lower coils of an excitation coil and a magnetic field detecting...
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7378843 |
Pulsed excitation and sampled detection fluxgate type magnetometer
A magnetic field measuring device, equipped with a fluxgate magnetometer, the device including a magnetic sensor equipped with at least one magnetic core and a plurality of windings, and configured...
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7372261 |
Printed circuit board integrated with a two-axis fluxgate sensor and method for manufacturing the same
A printed circuit board integrated with a two-axis fluxgate sensor includes a first soft magnetic core formed lengthwise in a first axial direction, a first excitation coil formed of a metal film...
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7363185 |
Fluxgate sensor for calibrating azimuth at slope and calibration method thereof
A two-axis fluxgate sensor has a driving pulse generating circuit which generates pulse signal and outputs as a driving signal, and X-axis and Y-axis fluxgates which are in proportional relation...
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7355398 |
Exciting coil drive circuit of magnetic sensor
An exciting coil drive circuit of a magnetic sensor comprises a D/A converter that receives input of digital data for detecting a magnetic field; a first amplifier that outputs a drive signal P...
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7355397 |
Magentometer circuit
A fluxgate magnetometer drive circuit includes a fluxgate inductor that is driven through magnetic saturation by altering voltage pulses. Following each drive pulse, the spurred magnetic energy in...
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7355392 |
Printed circuit card-based proximity sensor and associated method of detecting a proximity of an object
A proximity sensor assembly includes a multilayer printed wiring board proximity sensor, the proximity sensor being operable as either a variable-reluctance sensor or an eddy current loss sensor....
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7352177 |
Three-axis fluxgate-type magnetism detecting device and method
A three-axis fluxgate-type circuit having three fluxgate sensors for outputting three analog voltage values respectively. A controller normalizes three digital voltage values corresponding to said...
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7350425 |
Method of eliminating hysteresis from a magnetoelastic torque sensor
A method and device for reducing hysteresis in a torque transducer element includes a coil that is excited with an alternating current to produce a magnetic field that saturates the torque...
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7348772 |
Printed circuit board having weak magnetic field sensor and method of manufacturing the same
A Printed Circuit Board (PCB) having a weak magnetic field sensor of the present invention includes a base plate on which a first excitation circuit and a first detection circuit are formed on each...
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7317315 |
Magnetic azimuth measurement apparatus
A magnetic azimuth measurement apparatus without arithmetic means nor any mechanical motion such as rotation, not affecting its mass production ability because of a simple configuration, and making...
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7298141 |
Fluxgate and fluxgate magnetometers
A flexible fluxgate including:
at least two ferromagnetic or ferrimagnetic, flexible cores; at least two sets of a plurality of windings of an electrically conductive material, at least one...
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7298140 |
Three-dimensional magnetic direction sensor, and magneto-impedance sensor element
A three-dimensional magnetic bearing sensor 10 a includes a first sensor 101 , a second sensor 102 , and a third sensor 103 each constituted by a magneto-impedance sensor element 10 ...
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7271585 |
Method of fabricating a multilayer wiring board proximity sensor
A method of fabricating a multilayer wiring board proximity sensor includes forming a laminate, and fabricating a plurality of through-conductors through the layers of the laminate. The laminate...
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7224161 |
Magnet with electromagnetic coil/impedance/sensor element
A magneto impedance sensor element with electromagnetic coil comprised of: a terminal board on which an extended groove which extends in one direction has been formed; an electromagnetic coil, made...
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7212001 |
Fluxgate sensor integrated having pick-up coil mounted on excitation coil in printed circuit board and method for manufacturing the same
A fluxgate sensor is integrated in a printed circuit board. The fluxgate sensor has two bar-type(or rectangular-ring shaped) soft magnetic cores to form a closed magnetic path on a printed circuit...
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7208947 |
Fluxgate sensor integrated in a semiconductor substrate and method for manufacturing the same
In a fluxgate sensor integrated in a semiconductor substrate and a method for manufacturing the same, the fluxgate sensor includes a soft magnetic core formed on the semiconductor substrate, an...
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7123006 |
Sensing apparatus having fluxgate and control method thereof
In a sensing apparatus, and a control method of a sensing apparatus, the sensing apparatus includes a fluxgate including a driving coil for exciting a magnetic substance core with a current, first...
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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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7098658 |
Digital signal conditioning solution for a magnetometer circuit
A fluxgate magnetometer including a fluxgate and a digital processor. The digital processor includes an analog to digital converter for digitizing the back EMF from the fluxgate and a signal...
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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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7053608 |
Magnetometer having a dynamically adjustable bias setting and electronic vehicle compass incorporating the same
According to some embodiments of the present invention, a magnetometer includes at least one sensor for sensing a magnetic field component, a biasing circuit, and a processor. The sensor generates...
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7038448 |
Magnetic field sensor
A magnetic field sensor for measuring at least two components of a magnetic field comprises a ferromagnetic core mounted on a semiconductor chip, an exciter coil to which a current can be applied...
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7026812 |
Magnetic sensor
A magnetic sensor includes a magnetic sensitive member 11 including an amorphous wire, a detection coil 12 wound around the magnetic sensitive member 11 , and a sample-and-hold circuit for...
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7015691 |
Weak-magnetic field sensor using printed circuit board technology and method of manufacturing the same
In a weak-magnetic field sensor a rectangular ring-shaped magnetic core is wound by exciting circuit patterns and detecting circuit patterns, and weak-magnetic field sensors are implemented in...
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7009392 |
Method of estimating target signals by a dynamical fluxgate sensor
A method of estimating target signals (dc or low frequency signals) by a dynamical fluxgate sensor and a low-power fluxgate magnetometer operating according to the method. The sensor is pre-biased...
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6998840 |
Fluxgate sensor integrated having stacked magnetic cores in printed circuit board and method for manufacturing the same
A fluxgate sensor integrated in a printed circuit board. The fluxgate sensor has soft magnetic cores having a lower core and an upper core mounted on the lower core, for forming a closed magnetic...
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6984979 |
Measurement and control of magnetomotive force in current transformers and other magnetic bodies
A magnetic body having nonlinear permeability is influenced by a magnetomotive force, the magnitude of which is to be measured or controlled. An electric energy source is connected to a winding...
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6972563 |
Method of adjusting a fluxgate magnetometer apparatus
A single-axis, fluxgate magnetometer apparatus comprises: an excitation subassembly comprising a toroidal core wound with a predetermined number of turns of an excitation coil; and a pick up...
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6937130 |
Magnetic field production system, and configuration for wire-free supply of a large number of sensors and/or actuators using a magnetic field production system
A magnetic field production system is proposed and has a two-dimensional winding configuration with two windings. The windings are disposed essentially orthogonally with respect to one another and...
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6924724 |
Method and apparatus for transformer bandwidth enhancement
A method and apparatus for transformer bandwidth enhancement is disclosed. In one embodiment, a transformer is provided for use in a high frequency communication environment. In one configuration,...
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6909368 |
Magnetic field detection device
The present invention is a magnetic field detection device that makes use of a frequency characteristic affording circuit in order to selectively detect magnetic signals from a frequency domain...
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6867587 |
Excitation circuit for a fluxgate sensor
A fluxgate excitation circuit comprises an excitation inductor having a resistance Rsat and an inductance Lsat. Vin is provided by a half bridge converter of MOSFET switches (S 1 , S 2 ). The...
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6831457 |
Two-dimensional magnetic sensor including magneto-impedance sensor elements
The present invention is a two-dimensional magnetic sensor having a first magneto-impedance sensor element including a first magneto-sensitive element and a first electro-magnetic coil which is...
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6771066 |
Printed circuit fluxgate sensor for magnetic gradient detection device
A printed circuit fluxgate sensor for use in magnetic gradient detection devices and the like includes a highly magnetically saturable core formed as a flat, closed loop that is bonded between two...
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6762600 |
Method and apparatus for electromagnetic position and orientation tracking with distortion compensation employing a modulated signal
A bounding box or volume of interest is flooded with a modulated AC electromagnetic signal from a source. Different types of modulated signals may be used, including single-tone AM and FM. One or...
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6759845 |
Weak-magnetic field sensor using printed circuit board manufacturing technique and method of manufacturing the same
A weak-magnetic field sensor using printed circuit board manufacturing technique and a method of manufacturing the same which detects the Earth's magnetic field to obtain positional information is...
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6690164 |
Perpendicular detection fluxgate micromagnetometer and method for the production thereof
A fluxgate micro-magnetometer with perpendicular detection and a process of realization thereof. A ferromagnetic core is perpendicular to a substrate. The axes of excitation coils and pick-up coils...
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6633160 |
Fluxgate signal detection employing high-order waveform autocorrelation
Disclosed is a method for improving the sensitivity of a fluxgate magnetometer for which high-order harmonics are detected and utilized in determining a weak external magnetic field expressed in...
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