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Magnetic data processing device, magnetic data processing method, and magnetic data processing program

A technology for processing equipment and magnetic data, applied in the direction of the size/direction of the magnetic field, measuring magnetic variables, three-component magnetometers, etc., can solve different problems and achieve the effect of reducing the amount of data

Inactive Publication Date: 2011-01-19
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the true offset varies irregularly, the bearing derived by the magnetic data processing device is likely to be different from the actual bearing unless the user performs this operation frequently

Method used

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  • Magnetic data processing device, magnetic data processing method, and magnetic data processing program
  • Magnetic data processing device, magnetic data processing method, and magnetic data processing program
  • Magnetic data processing device, magnetic data processing method, and magnetic data processing program

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[0028] (Overview)

[0029] In the first embodiment of the present invention, when the distribution of the magnetic data of the recent statistical population or the mixed statistical population is three-dimensional, the offset is derived three-dimensionally based on the recent statistical population or the mixed statistical population. On the other hand, when the distribution of the magnetic data of the newly statistical population is two-dimensional, the offset amount derived in the past (ie, the old offset amount) is two-dimensionally corrected based on both the recent statistical population and the old offset amount. ), and generate a mixed statistical population from both the recent statistical population and the past statistical population.

[0030] (Configuration of Magnetic Data Processing Equipment)

[0031] figure 1 It is a block diagram showing an embodiment of the magnetic data processing device of the present invention. The magnetic data processing device 1 is installed ...

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Abstract

The invention discloses a magnetic data processing device, a magnetic data processing method, and a magnetic data processing program. In a magnetic data processing device, an accumulating part sequentially acquires magnetic data output from a 3D magnetic sensor to provide a recent statistical population of the magnetic data. A past statistical population storage part stores, as a past statisticalpopulation, magnetic data output from the 3D magnetic sensor prior to the magnetic data accumulated as the recent statistical population. A determination part determines whether a distribution of therecent statistical population satisfies a certain condition, and determines whether a mixed statistical population of the past and recent statistical populations satisfies another condition when the recent statistical population does not satisfy the certain condition. An offset derivation part derives an offset of the magnetic data based on the recent statistical population when it satisfies the certain condition and derives an offset of the magnetic data based on the mixed statistical population when it satisfies said another condition. The past statistical population storage part updates the past statistical population using the recent statistical population.

Description

Technical field [0001] The invention relates to a magnetic data processing device, a magnetic data processing method and a magnetic data processing device [0002] In particular, the present invention relates to the offset correction of three-dimensional geomagnetic data. Background technique [0003] A conventional three-dimensional (3D) geomagnetic sensor is installed on a movable object (such as a mobile phone) to detect the direction of the geomagnetic field. When a magnetic data processing device derives an orientation based on magnetic data, the device needs to perform processing for correcting the magnetic data to eliminate measurement errors caused by the magnetization of a moving object. The control value used for this correction process is derived based on a plurality of magnetic data, and is referred to as "offset". [0004] However, the magnetic data includes not only the offset component caused by the magnetization of the moving object, but also the magnetic field caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02G01C21/08
CPCG01C17/38G01R33/0206G01R33/0029
Inventor 半田伊吹
Owner YAMAHA CORP
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