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JP2008261878A |
To correct a vehicle compass measurement for an interfering magnetic field generated by a vehicle accessory.A method for correcting a vehicle compass measurement for an interfering magnetic field generated by a vehicle accessory, where t...
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JP4170284B2 |
A motion estimation method and system for a mobile body are provided. The method includes: obtaining magnetic field information from compass information of the mobile body; comparing the magnetic field of the mobile body with a predeterm...
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JP4167263B2 |
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 of steps of a human based on acceleration...
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JP4161985B2 |
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JP2008216181A |
To provide a magnetic sensor element having equal sensitivity without a degradation of sensitivity in X-, Y-, Z-directions while being small in size and height and an azimuth sensor mountable on a mobile information terminal in which thr...
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JP4151658B2 |
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JP4151785B2 |
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JP4151784B2 |
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JP4152365B2 |
To provide a geomagnetic variation sensing device capable of detecting a change in geomagnetism in three dimensions, without any restriction of the movement of a magnet. When the geomagnetism does not change, a pointer 11 is arranged at ...
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JP4149344B2 |
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JP4142631B2 |
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JP2008190939A |
To provide a magnetic azimuth detection device capable of always detecting a highly-accurate geomagnetic azimuth angle, even if great magnetization fluctuation occurs.This device has a constitution having two magnetic elements, a magneti...
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JP4134074B2 |
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JP2008180673A |
To solve a problem wherein the magnetometric sensor output trajectory is not a circle near a movable magnetic substance, so that offset of a magnetometric sensor cannot be determined and accurate azimuth cannot be calculated.A constituti...
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JP2008175758A |
To provide an azimuth sensor capable of electrically extracting a direction of an azimuthal magnetic needle operated by a terrestrial magnetism, by a simple method.The azimuth sensor includes a disk-like azimuthal magnet 12 with a transm...
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JP4122834B2 |
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JP4125059B2 |
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JP4118297B2 |
The present invention relates to a method of compensating tilt using a two-axis geomagnetic sensor (100) and an acceleration sensor (200) and an apparatus. Using the principle where a geomagnetic field value measured in a state where one...
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JP4120648B2 |
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 magnetic field, and a tilt sensor that dete...
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JP4111211B2 |
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JP2008128649A |
To solve the problem wherein enormous calculation is required to determine the offset with high accuracy, in an azimuth sensor for calculating the offset of a magnetic sensor from an output of the magnetic sensor.The azimuth sensor inclu...
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JP4093861B2 |
A three-axis algebraic model is used to numerically compensate for magnetic errors in measured magnetic field values in an electronic compass for any orientation of the compass. This model is based on physical principles and uses a linea...
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JP4093981B2 |
A mobile map display device has a terrestrial magnetism sensor for measuring terrestrial magnetism, a display section, and a control section capable of calculating a geographical bearing based on the value measured by the terrestrial mag...
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JP4093982B2 |
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JPWO2006035505A1 |
The control device 200 calibrates the magnetic sensor 100 by calculation. The calculation unit 210 calculates the magnetic field strength from each output of the X, Y, and Z axes of the magnetic sensor 100. Do this for 4 or more differen...
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JP4083557B2 |
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 and a previous display direction, to be ...
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JP4077565B2 |
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JP4075402B2 |
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JP4075551B2 |
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JP4073715B2 |
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JP4070879B2 |
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JP4068658B1 |
To provide a policy-based simple navigator that can be easily used by anyone by specifying a range of use, does not use an electronic circuit, a battery or the like for cost reduction, and can be used without rotating or moving map data....
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JP4066643B2 |
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JP4053783B2 |
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JP4052999B2 |
To provide a magnetic displacement sensor, capable of being used for predicting earthquakes etc., and to provide an apparatus for also recording its output. The magnetic displacement sensor comprises both a magnetic compass and a detecti...
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JP2008039409A |
To provide a buoyancy type magnetic azimuth detection element capable of reducing the size of a ring-like bobbin and applied with an exciting winding.A liquid 13 occupying approximately half a ring-like cavity of the nonmagnetic ring-lik...
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JP4047335B2 |
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 measured in a horizontal plane; an accel...
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JP4047866B2 |
A video device for displaying a menu in a fixed position regardless of its rotation state. The photographing device comprises a geomagnetic sensor for detecting a predetermined output value corresponding to a geomagnetism; a display unit...
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JP2008020296A |
To solve the problems wherein, when a biaxial magnetometric sensor is tilted, accurate inclination correction is impossible, and resultantly, accurate azimuth cannot be calculated.This sensor has a configuration having a magnetometric se...
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JP4039098B2 |
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JP4034556B2 |
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JP4034039B2 |
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JP4026937B2 |
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JP4023476B2 |
An azimuth meter using spin-valve giant magneto-resistive elements, which is simple in manufacturing process, can be made compact in size and contribute to power saving, is disclosed. The azimuth meter comprises a quadrilateral plane coi...
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JP2007309833A |
To provide an azimuth calculation program and an electronic compass capable of calculating an azimuth even in a system having a tilt angle without using a tilt sensor. In this azimuth calculation program, X-Y Lissajous waveform data are ...
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JP2007304105A |
To provide a fluxgate geomagnetic sensor capable of calibrating an accurate azimuth value even at slopes by using a neural network. This geomagnetic sensor comprises a driving pulse generating circuit which generates pulse signal and out...
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JP4007034B2 |
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JP4007464B2 |
The present invention relates to a magnetic sensor apparatus which is capable of detecting a very weak magnetic field even when the DC bias magnetic field is at zero and greatly reducing detection output occurring due to factors such as ...
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JP4006674B2 |
To provide a thin and small-area azimuth meter. A plane coil and at least two groups of thin film magneto resistive elements are arranged. Each of the groups of thin film magneto resistive elements constitutes an MR bridge and detects an...
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JP4004166B2 |
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