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7613581 |
Method, apparatus, and medium for calibrating compass sensor in consideration of magnetic environment and method, apparatus, and medium for measuring azimuth using the compass sensor calibration method, apparatus, and medium
A method of calibrating a compass sensor in consideration of a magnetic environment is provided. The method includes (a) acquiring magnetic force data by rotating a compass sensor 360 degrees, the...
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7606676 |
Compass sensor unit and portable electronic device
In a compass sensor unit, an azimuth data computing method is carried out by the steps of: inputting a signal from a geomagnetic sensor to measure magnetic field; determining whether to store...
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7581326 |
Optical solid-state heading sensor
A heading sensor includes a housing containing an interferometer having a mirror movable in response to fluctuations in a gravitational force applied to the housing. The interferometer, responsive...
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7559148 |
Magnetic azimuth detecting device
A magnetic azimuth detecting device is easily reduced in size. Three or more magnetic sensors 3 and a control semiconductor 4 controlling these magnetic sensors 3 are attached to and mounted...
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7552541 |
Pointing device
A pointing device includes hall elements that detect inclinations of a magnet in first, second and third directions, and a control unit that determines a pointing direction with output voltages of...
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7532991 |
Magnetic data processing device
In a magnetic data processing device, an input part sequentially inputs magnetic data outputted from a two-dimensional or three-dimensional magnetic sensor. The magnetic data is two-dimensional or...
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7523559 |
Compass heading noise immunity
A method of controlling an electronic compass assembly includes calibrating magnetic field sensors to produce a calibration product and determining whether a magnetic interference condition exists...
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7509748 |
Magnetic MEMS sensors
The disclosure relates to micro-electromechanical systems (MEMS) and magnetic MEMS sensors. The sensors include a substrate having a surface, a first magnetic field detector positioned on the...
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7474977 |
Compass sensor unit and portable electronic device
In a compass sensor unit, an azimuth data computing method is carried out by the steps of: inputting a signal from a geomagnetic sensor to measure magnetic field; determining whether to store...
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7458166 |
Vehicle compass system with continuous automatic calibration
The compass system of the present invention utilizes an improved calibration route in which a processing circuit of the compass recalibrates the compass each time three data points are obtained...
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7451549 |
Automatic calibration of a three-axis magnetic compass
A magnetic compass apparatus and method to account for magnetic distortion while determining a magnetic heading is disclosed. The method enables a compass module, comprising at least two...
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7437242 |
Navigation apparatus
A navigation apparatus mounted on a vehicle is equipped with a first gyro sensor and a second gyro sensor arranged in symmetry with respect to a first axis in a travel direction of the vehicle and...
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7436120 |
Compensation of magnetic fields
For compensation of a magnetic field in an operating region a number of magnetic field sensors (S 1 , S 2 ) and an arrangement of compensation coils (Hh) surrounding said operating region is used....
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7421792 |
Apparatus and method of calibrating azimuth of mobile device
Provided are an apparatus and method of calibrating azimuth of a mobile device. The apparatus includes: a motor; a magnetic field measuring unit disposed in the mobile device and measuring magnetic...
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7400142 |
Dynamic magnetic anomaly compensation
An array of three-axis magnetometers used for dynamic magnetic anomaly compensation are located at the corners of a parallelopiped, with pairs of magnetometer outputs used to derive a magnetic...
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7389590 |
Geomagnetic sensor for computing azimuth and method thereof
A geomagnetic sensor for computing an azimuth and a method thereof. The geomagnetic sensor includes a geomagnetic sensor module, including X, Y and Z axis fluxgates orthogonal to one another, for...
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7377046 |
Inclination sensor and azimuth measuring apparatus using inclination sensor
A mobile device or the like having a 3-axis electronic compass is rotated, and the outputs from magnetic sensors disposed in the three axis directions are input to a first arithmetic processing...
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7363718 |
Orientation data generation method, orientation sensor unit and portable electronic equipment
Data are input from a geomagnetic sensor that detects magnetic fields in three axial directions, and magnetic field data are measured on the basis of the input data. The measured magnetic field...
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7346995 |
System and method for compensating for magnetic disturbance of a compass by a moveable vehicle accessory
A vehicle compass system for compensating for magnetic disturbances caused by a moveable vehicle accessory includes a magnetic field sensor and a control circuit coupled to the moveable vehicle...
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7346466 |
Geomagnetic sensor and geomagnetic sensor correction method, temperature sensor and temperature sensor correction method, geomagnetism detection device
A magnetism detection device includes a geomagnetism detection element for detecting geomagnetism of each transverse axial component and a nonvolatile memory element of a thermal metamorphic type...
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7337549 |
Input device for using geomagnetic sensor and a method thereof for generating input signal
An input device using a geomagnetic sensor includes a geomagnetic sensor outputting a voltage corresponding to geomagnetism, and a control part calculating an azimuth using the voltage output from...
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7331115 |
Vehicle compass compensation
A compass compensation system is provided for automatically and continuously calibrating an electronic compass for a vehicle, without requiring an initial manual calibration or preset of the...
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7331114 |
Magnetic compass structure
A simple self-contained, hand-held instrument for reading an azimuth or bearing in relation to the earth's magnetic field either out in the field or on the water with substantial accuracy. Means...
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7325320 |
Method for estimating the accuracy of azimuthal orientations and portable sighting device
In a method according to the invention for estimating the accuracy of azimuthal orientations (a) of a measuring device ( 1 ) having an electronic magnetic compass ( 2 ), a plurality of...
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7322117 |
System and method for compensating for motor magnetic disturbance of a compass measurement
A method for correcting a vehicle compass measurement for an interfering magnetic field generated by a vehicle accessory, where the interfering magnetic field has an intensity sufficient to cause a...
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7281339 |
Encoder system
A structure and associated method to accurately read an encoder tape in an encoder system. The encoder system comprises, a read head, a shoe structure adjacent the read head, and an encoder tape....
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7278219 |
Magnetic compass
A magnetic compass includes: a three-axis magnetic sensor for detecting geomagnetic vector as geomagnetic components in directions of three orthogonal axes x, y, and z; a data-plane calculating...
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7268544 |
Magnetism detecting device for canceling offset voltage
A magnetism detecting device includes a magnetometric sensor, a bias magnetic field generating unit, a voltage applying unit, a detecting unit, and an operating unit. The detecting unit calculates...
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7260896 |
Electronic compass and method of calibration
An electronic compass assembly includes a first collection portion and a second collection portion that each collect magnetic field data. The magnetic field data collected by the second collection...
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7249419 |
Portable terminal apparatus with auto caliblation of orientation measurement
A portable terminal apparatus is mounted in a casing and has a magnetic sensor that detects a magnetic field around the casing with an offset and outputs magnetic data representing the detected...
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7248983 |
Electronic compass and method of controlling an electronic compass using independent calibration and compass heading modules
A method for controlling an electronic compass includes receiving raw magnetic field data into a calibration module and determining a calibration output based upon the raw magnetic field data. The...
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7225552 |
Method and system to detect an orientation of a moving object
Method and system to detect orientations of a moving object using one or more magnetic compasses. The method and system minimize magnetic field interference in a space where an object is moving...
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7225551 |
Electronic compass and method for tracking vehicle rotation
An example method for controlling an electronic compass includes determining compass tracking angles in a coordinate system for magnetic field data points that correspond to magnetic field sensor...
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7210236 |
Method and apparatus for measuring magnetic offset of geomagnetic sensor and portable electronic apparatus
A method is designed for measuring a magnetic offset of a geomagnetic sensor equipped in a portable information terminal apparatus having a storage. The geomagnetic sensor has a magnetic...
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7210235 |
Apparatus and method for detecting azimuth and inclination angle, program for detecting the same, and portable terminal device for detecting the same
In an azimuth/inclination-angle detection apparatus, a measurement data obtaining unit obtains first and second measurement data sets g and h from acceleration and magnetic sensors, respectively. A...
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7200948 |
Geomagnetic sensor for detecting azimuth angle and method thereof
A geomagnetic sensor and method are provided. The geomagnetic sensor has a geomagnetic detection module for outputting an electric signal value corresponding to a geomagnetism, a tilt detection...
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7194816 |
Mobile terminal apparatus
A mobile terminal apparatus 1 uses an acceleration sensor as a tilt angle sensor 24 , and realizes various applications based on this detection result. A processing unit 10 counts the number...
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7194815 |
Device for detecting magnetic azimuth
There is provided a quadrilateral insulating substrate, and plural magnetic sensors are provided on the substrate. An IC is provided on the substrate for supplying driving signals to the magnetic...
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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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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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7162807 |
Geomagnetic sensor having a dip angle detection function and dip angle detection method therefor
A geomagnetic sensor supporting a dip angle detection function. The geomagnetic sensor includes a rotation angle measurement part for measuring pitch and roll angles of the main body with respect...
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7159326 |
Electronic device, computer program product and method of operating built-in compass
There is provided an electronic device having a built-in compass, comprising: a processing unit for controlling functions of the electronic device; an input device for giving control commands; an...
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7155837 |
Geomagnetic sensor for detecting dip angle and method thereof
A geomagnetic sensor includes a geomagnetic detection module configured to output an electrical signal having a magnitude corresponding to a magnetic field; a memory configured to store an azimuth...
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7155836 |
Method and apparatus for using magnetic field
Provided a method and apparatus for using a magnetic field. The method includes: measuring and storing magnetic field data indicating magnitudes of a magnetic field in different directions at each...
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7146740 |
Methods and apparatus for automatic magnetic compensation
A method for characterizing distortions in the earth's magnetic field caused by a vehicle having a magnetometer affixed therein is described. The method includes repeatedly measuring the distorted...
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7127823 |
Vehicle compass system with continuous automatic calibration
The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained...
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7093371 |
Direction indicating device
A direction indicating device in which a current display direction is determined in consideration of the historical information of a direction of vehicle specified by a direction specifying unit 1...
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7086164 |
Method and device for measuring directional, and computer program
A method for measuring a directional of a body in a three-dimensional space defined by an X-axis (magnetic north), a Y-axis, and a Z-axis is proposed. A geomagnetic force along an x-axis, which is...
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7065891 |
Accelerometer augmented precision compass
A compass device includes a platform defining an xz-plane and an x-axis. A first accelerometer is coupled to the platform at an angle such that the first accelerometer is sensitive to movement of...
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7028410 |
Portable terminal
The present invention aims to achieve that geomagnetism can be sensed in high precision while eliminating an adverse influence by magnetic noise with respect to a geomagnetic sensor provided in a...
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