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8170886 |
Systems, methods, and apparatus to generate an energy consumption index
Systems, methods, and apparatus to generate an energy consumption index are disclosed. In one described example, a method to generate an energy consumption index is disclosed, the method including...
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8108171 |
Systems and methods for calibration of gyroscopes and a magnetic compass
Calibration systems and methods simultaneously calibrate a magnetic compass and gyroscopes. An exemplary embodiment rotates the field calibration system. Based upon the rotation sensed by the...
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7895759 |
Electronic device and method for indicating direction in electronic device
An electronic device includes resistor, a pointer, a measuring module, a calculating module, and a display module. The resistor has a reference point corresponding with a reference direction. The...
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7873491 |
AC magnetic tracking system with non-coherency between sources and sensors
In an AC magnetic tracker one or more multi-axis field sources, each operating at a different frequency, or frequency set, are detected and tracked in three-dimensional space, even when wireless or...
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7635930 |
Stage apparatus
At least one exemplary embodiment is directed to a stage apparatus which includes a stage movable in a first direction, a linear motor configured to drive the stage in the first direction, a magnet...
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7379814 |
Electronic compass system
An electronic compass system includes a magnetic sensor circuit having at least two sensing elements for sensing perpendicular components of the Earth's magnetic field vector. A processing circuit...
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7181857 |
Geomagnetic sensor for auto-calibration of magnetic field deviation and method of using the same
A geomagnetic sensor for auto-calibration of a deviation and a method of using the geomagnetic sensor. The geomagnetic sensor includes a geomagnetic detector including X-axis and Y-axis fluxgates...
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7168177 |
Method and apparatus for determining a geomagnetic field by using a compass and method and apparatus for determining an azimuth angle of a moving object using the same
There are provided a method and apparatus for determining a geomagnetic field by using a compass and a method and apparatus for determining an azimuth angle of a moving object using the method and...
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7168176 |
Geomagnetic sensor for informing users whether detected azimuth angle is acceptable, and a method thereof
A geomagnetic sensor which informs a user that information with respect to a distorted azimuth angle may be detected. The geomagnetic sensor includes a geomagnetism detection module including an X...
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7134213 |
Magic compass
A magic compass that gives the illusion it defies the laws of nature, providing usage as an aid for locating the direction of prayer as well as a novel promotional device for companies, having a...
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7127369 |
Sensor assembly
A system with a sensor assembly is used to determine direction of movement of an object so that accuracy of position calculation is improved. The sensor assembly measures at least two operational...
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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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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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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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6760678 |
Electronic compass
A method and system for continuously and automatically calibrating the settings of an electronic compass, as needed, while a vehicle moves from place to place is shown. The calibration technique of...
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6566856 |
Closed-loop magnetoresistive current sensor system having active offset nulling
A magnetoresistive sensor system having resistive elements changing in ohmic value in the presence of a magnetic field of a current being measured. The variant values of the elements are amplified...
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6523271 |
Method of adjusting drive current of magnetism sensor and electronic azimuth meter
To reduce a dispersion in a sensitivity of a magnetism detecting circuit driving, by current, a magnetism sensor comprising magnetism resistance elements in a bridge constitution to a dispersion in...
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6512370 |
Low power, frequency-mode magnetometer
A low power, frequency-mode magnetometer. The magnetometer includes an LC oscillator, a bias resistor and a polarity switch. The LC oscillator produces an output signal having a variable frequency...
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6502014 |
Regulating circuit for regulating the driving stability of a motor vehicle using a motor vehicle reference model
The present invention relates to a control circuit for controlling the driving stability of a vehicle where the input quantities determining the course of track are input in a vehicle model circuit...
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6466871 |
Method for calibrating and verifying the attitude of a compass
A method for calibrating the attitude of a compass in relation to the platform on which the compass is installed. The compass includes an attitude determining device and an optical sighting device...
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6427349 |
Compensation system for electronic compass
An electronic compass is described for use in vehicles. The compass employs a magnetoresistive sensor for sensing the earth magnetic field and the sensor is operated in alternate set/reset bias...
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6407547 |
Biaxial flux gate type magnetic sensor
A biaxial flux gate type magnetic sensor has a core which is made of a magnetic thin film in the shape of a loop, patterned upper and lower electrically conductive thin-film layers respectively...
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6380735 |
Orthogonal flux-gate type magnetic sensor
A magnetic sensor of orthogonal flux-gate type is provided with a cylindrical core made of a soft magnetic material; an internal conductor that is placed inside the core; a detection coil wound up...
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6282803 |
Self calibration circuit for determining an accurate zero compensation for a fluxgate compass
A self calibrating zero compensation circuit for a fluxgate compass comprising a toroidal core; a drive winding coupled to said core, and at least one and preferably two secondary sensing windings...
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6222363 |
Switch-mode flux-gate magnetometer
A flux gate inductor responsive to an external magnetic field produced by a rotating magnetoelastic sleeve and oscillating voltage applied to the flux gate inductor induces a field in the flux gate...
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6218831 |
Low power fluxgate circuit with current balance
The present invention is a system for cyclically driving an electrical current through at least one non-linear (i.e., saturable) inductor in alternating directions so as to produce a substantially...
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6181130 |
Magnetic sensor having excitation coil including thin-film linear conductor sections formed on bobbin with detection coil wound thereon
A magnetic sensor includes a bobbin having one surface provided with a toroidal groove, and a toroidal inductor accommodated in the groove. The toroidal inductor has a toroidal core and an...
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6141881 |
Electronic analogue compass
An compass having an electronic magnetic field sensor and an analog directional display is disclosed wherein a signal from the field sensor proportional to one component of the earth's magnetic...
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6084406 |
Half-cycle saturable-core magnetometer circuit
A magnetic field sensor element comprises an elongated core of high-magnetic permeability material having a coil of electrically-conductive wire wound around and along a central axis of the core....
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6070333 |
Electronic compass
An electronic compass has a compass housing. An electronic magnetic field sensor is disposed in a fixed position relative to the compass housing. A magnet is rotatably mounted relative to the...
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6044315 |
Vehicle non-volatile memory system
An electronic vehicle accessory includes a non-volatile memory, and a controller coupled to the non-volatile memory and to a speed sensor of the vehicle for receiving speed data representing the...
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6014025 |
PWM flux-gate circuit for measuring magnitude and direction of a magnetic field
A Micro-Powered Flux-Gate Magnetometer is provided for measuring the strength and direction of external magnetic fields. The magnetometer includes a saturable core inductor, or flux-gate positioned...
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5850624 |
Electronic compass
An electronic compass (10) for use in a boring tool (12) which will provide an orientation of the boring tool relative to the earth's magnetic field. In addition, a more straightforward left or...
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5757184 |
Magnetic field detection apparatus with bilateral electrical switch for inverting magnetic sensor current
A magnetic detection apparatus is disclosed, the size and cost of which can easily be reduced and with which excellent sensitivity can be obtained. The magnetic detection apparatus according to the...
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5749150 |
Direction indicator for navigation
An electronic audio/visual direction indicator for underwater or other types of navigation which gives unobtrusive and continuous directional feedback without the need for manual manipulation.
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5672967 |
Compact tri-axial fluxgate magnetometer and housing with unitary orthogonal sensor substrate
A tri-axial fluxgate magnetometer and housing therefor that includes elements which facilitate a small sized, relatively low cost magnetometer assembly without sacrificing accuracy and reliability....
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5655308 |
Illuminating navigation device
An electronic audio/visual direction indicator for underwater or other types of navigation which gives unobtrusive and continuous directional feedback without the need for manual manipulation.
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5652512 |
Advanced digital flux gate magnetometer
Digital logic comprising a high speed analog to digital converter, a high speed analog to digital converter, a digital multiplier, and an infinite impulse response filter and decimation circuit are...
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5581899 |
Process for compensating a magnetic interference field in a vehicle
Process for compensating a magnetic interference field in a vehicle having a navigation installation. During a calibration run for initial compensation, a first set of interference field parameters...
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5564194 |
Geomagnetic direction sensor
A geomagnetic direction sensor has a substrate, at least two magneto-resistive effect devices and a coil for generating the bias magnetic field. The substrate retains shape symmetry when rotated...
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5560115 |
Gimbaled magnetometer with inductive coupling
An apparatus for mounting a magnetometer including a frame and a platform mounted for rotation within the frame. The magnetometer and one or more counterweights are mounted within the platform such...
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5481808 |
Vehicle orientation sensor and method with magnetic stabilization
A device for determining the orientation of a vehicle includes a magnetic field sensor (3) which is arranged in the vicinity of a ferromagnetic outer wall of the body of the vehicle and which is...
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5444916 |
Electronic stereo clino-compass
An electronic stereo clino-compass which can be targeted directly at the discontinuous surface of a soil layer and in particular, where the running direction (azimuth) and inclination of a target...
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5435070 |
Simplified compass with multiple segment display capability
An apparatus for determining the direction of a magnetic field is provided with a plurality of magnetically sensitive components arranged with their sensing axes equally spaced around a circular...
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5418460 |
Compact triaxial AC magnetic field analyzer/dosimeter using swept bandpass filters
A triaxial AC magnetic field analyzer/dosimeter instrument measures the field strength of three mutually orthogonal AC magnetic field components at a plurality of different frequencies in a...
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5394029 |
Geomagnetic orientation sensor, means, and system
The Geomagnetic Orientation Sensor is a device used to determine the orientation of objects with respect to the magnetic field surrounding the earth. The sensor may also be used to determine...
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5353241 |
Shifting system and method for an electronic compass system
A shifting compensation circuit which employs a ranging circuit having a variable direct voltage source, to compensate for abnormally large vehicle magnetic fields. A ranging circuit is coupled...
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5339529 |
Magnetic sensor mount
A magnetic sensor mounting assembly embodying the present invention includes a base plate having cradles for pivotally receiving and adjustably locking a sensor supporting platform thereto. The...
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5287628 |
Omni range inclino-compass
A solid-state omni range incline-compass having a gravity sensor and a geomagnetic flux sensor provided on, each of three orthogonal axes established on a moving body a unit for generating a...
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