Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Calibration method and mobile terminal of electronic compass

A mobile terminal and electronic compass technology, applied in the field of communication, can solve the problems of inaccurate pointing of electronic compass, inability to effectively and conveniently eliminate the interference of charging magnetic field, etc., and achieve the effect of effective and convenient calibration

Active Publication Date: 2021-01-08
VIVO MOBILE COMM CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] An embodiment of the present invention provides a calibration method for an electronic compass to solve the problem that the prior art cannot effectively and conveniently eliminate the magnetic field interference caused by charging, and the electronic compass points inaccurately.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calibration method and mobile terminal of electronic compass
  • Calibration method and mobile terminal of electronic compass
  • Calibration method and mobile terminal of electronic compass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] refer to Figure 6 As shown, the embodiment of the present invention provides a method for calibrating an electronic compass, which is applied to a mobile terminal, and may specifically include steps 601-604:

[0044] Step 601: When it is detected that the above-mentioned mobile terminal is in the charging state, prohibit updating the preset calibration parameters.

[0045] In the embodiment of the present invention, if the electronic compass is not prohibited from updating the preset calibration parameters when the mobile terminal starts charging, the subsequent charging interference magnetic field will cause the update of the preset calibration parameters, and then the updated calibration parameters obtained above will be calibrated The current magnetic field parameters will be wrong, because the above-mentioned updated preset calibration parameters cannot fully eliminate the charging interference, and the calibration effect of the subsequent charging calibration para...

Embodiment 2

[0073] refer to Figure 7 As shown, the embodiment of the present invention provides a method for calibrating an electronic compass, which is applied to a mobile terminal and may include steps 701-709:

[0074] Step 701: When the mobile terminal is in an uncharged state, acquire a first initial magnetic field parameter of the electronic compass; the first initial magnetic field parameter has been calibrated with preset calibration parameters.

[0075] Before the above-mentioned electronic compass of the mobile terminal is used during charging, it is necessary to establish a corresponding relationship between the test current value and the charging calibration parameters.

[0076] For mobile terminals, as a mass-produced electronic device, it is considered that the charging interference magnetic field generated by charging is only related to the charging current value, and when the charging current value is within a certain range, the generated charging interference magnetic fi...

Embodiment 3

[0113] refer to Figure 8 As shown, the embodiment of the present invention provides a mobile terminal, which may include:

[0114] Triggering the update prohibition module 801, used to prohibit updating the preset calibration parameters when it is detected that the above-mentioned mobile terminal is in the charging state;

[0115] The current magnetic field parameter acquisition module 802 is used to acquire the current magnetic field parameters of the above-mentioned electronic compass; the above-mentioned current magnetic field parameters have been calibrated by the above-mentioned preset calibration parameters;

[0116] A charging calibration parameter acquisition module 803, configured to acquire a charging calibration parameter corresponding to the current charging current value of the mobile terminal;

[0117] The charging calibration module 804 is configured to calibrate the above-mentioned current magnetic field parameters according to the above-mentioned charging ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiments of the present invention relate to the communication field, and in particular, to a method for calibrating an electronic compass and a mobile terminal. The method is applied to a mobile terminal, including: when it is detected that the mobile terminal is in a charging state, prohibiting updating of preset calibration parameters; obtaining the current magnetic field parameters of the electronic compass; the current magnetic field parameters have passed the preset Calibration parameter calibration; acquiring charging calibration parameters corresponding to the current charging current value of the mobile terminal; and calibrating the current magnetic field parameters according to the charging calibration parameters. The embodiment of the present invention achieves the technical effect of effectively and conveniently calibrating the above-mentioned electronic compass without the need for the user to perform calibration actions during the charging process of the mobile terminal; solves the problem that the prior art cannot effectively and conveniently eliminate the magnetic field interference caused by charging. Electronic compass points inaccurately.

Description

technical field [0001] The embodiments of the present invention relate to the communication field, and in particular, to a method for calibrating an electronic compass and a mobile terminal. Background technique [0002] With the popularity of mobile terminals, electronic compass has been more and more applied to handheld mobile devices similar to mobile terminals. Its main function is to provide users with azimuth or navigation by detecting the geomagnetic field; secondly, it can be used for The fusion algorithm of the gyroscope provides an absolute pointing to ensure the accuracy of the absolute orientation. However, there are many interfering magnetic fields in the mobile terminal that are stronger than the weak geomagnetic field, such as the zoom motor of the camera in the mobile terminal, the vibration motor, the speaker, the receiver, etc., and there are magnetic substances in these structures. This feature makes the measurement of the earth's magnetic field by the el...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01C17/38H04M1/725H04M1/72454
Inventor 赵恒伟
Owner VIVO MOBILE COMM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com