Method and device for determining magnetic azimuth and mobile terminal

A magnetic azimuth and mobile terminal technology, applied in the field of navigation, can solve problems such as calculation errors and achieve accurate navigation

Inactive Publication Date: 2018-01-12
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Abstract
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Problems solved by technology

In the related art, the electronic compass uses a 6-dimensional fusion (6D-fusion) algorithm or a 9-dimensional fusion (9D-f

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  • Method and device for determining magnetic azimuth and mobile terminal
  • Method and device for determining magnetic azimuth and mobile terminal
  • Method and device for determining magnetic azimuth and mobile terminal

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Embodiment Construction

[0059] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0060] In the related art, the electronic compass only uses the 6-dimensional fusion algorithm or the 9-dimensional fusion algorithm to calculate the magnetic azimuth angle, resulting in errors in the calculated magnetic azimuth angle. In the embodiments of the present disclosure, a technical solution for determining the magnetic azimuth angle is provided. The magnetic azimuth angle calculated b...

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Abstract

The invention discloses a method and a device for determining a magnetic azimuth and a mobile terminal. The method is applied to the mobile terminal; the mobile terminal is provided with an accelerometer, a magnetometer and a gyroscope; the method comprises the following steps: acquiring a current motion state, wherein the current motion state is a static state or a moving state; detecting whethermagnetic interference exists; if the current motion state is the static state and the magnetic interference does not exist, applying a first magnetic azimuth calculated according to a measured valueof the accelerometer and a measured value of the magnetometer; if the current motion state is the moving state and/or the magnetic interference exists, applying a second magnetic azimuth calculated according to the measured value of the accelerometer, the measured value of the magnetometer and a measured value of the gyroscope. According to the invention, the magnetic azimuth to be applied is determined according to the current motion state of the mobile terminal and whether the magnetic interference exists around the mobile terminal, so that the magnetic azimuth with a relatively small application error is selected, and thus navigation of an electronic compass is more accurate.

Description

Technical field [0001] The embodiments of the present disclosure relate to the field of navigation technology, and in particular, to a method, device, and mobile terminal for determining a magnetic azimuth angle. Background technique [0002] With the development of mobile phones, more and more mobile phones have the function of an electronic compass, which can indicate the geomagnetic direction and make map navigation more accurate. [0003] The electronic compass can display the magnetic azimuth angle, which is used to indicate the accurate geomagnetic direction to the user. The magnetic azimuth angle is the angle between the horizontal component of the magnetic induction intensity along the surface direction and the geomagnetic north. In related technologies, the electronic compass uses a 6-dimensional fusion (6D-fusion) algorithm or a 9-dimensional fusion (9D-fusion) algorithm to calculate the magnetic azimuth angle, and both algorithms have factors that cause calculation error...

Claims

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Application Information

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IPC IPC(8): G01C17/32G01C17/38G01C21/18
Inventor 解霏陈朝喜高文俊
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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