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Method and device for acquiring terminal movement direction

A movement direction and terminal technology, applied in the direction of measuring devices, indicating/recording actions, instruments, etc., can solve the problems of wrong navigation direction, wrong navigation result, wrong navigation direction acquisition, etc., and achieve the effect of improving accuracy

Active Publication Date: 2014-01-29
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the user holds the terminal for navigation, if the movement direction of the terminal is not the same as the horizontal projection direction of the terminal, that is, when the user holds the terminal crookedly or upside down, the determined horizontal projection direction of the terminal is not the same as the terminal movement direction , so you get the wrong navigation direction, which leads to wrong navigation results
For example: the user moves the terminal horizontally to the north, but since the terminal is placed horizontally, the horizontal projection direction of the terminal is eastward, resulting in an error in obtaining the navigation direction

Method used

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  • Method and device for acquiring terminal movement direction

Examples

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Effect test

Embodiment 1

[0025] The embodiment of the present invention provides a method for obtaining the terminal movement direction, see figure 1 , the method flow includes:

[0026] 101: When it is detected that the user completes a step counting cycle while walking, according to the first horizontal projection angle obtained by the electronic compass in the current step counting cycle and the second horizontal projection obtained by the electronic compass in the previous step counting cycle Angle, to determine whether the user has turned while traveling;

[0027] 102: If it is determined that the user has turned while traveling, calculate the first angle of the pitch angle and the second angle of the roll angle of the current posture of the terminal relative to the horizontal plane, and calculate the first angle and the second angle according to the first angle and the second angle Angle, select the first target algorithm in the tilting yaw angle algorithm and the acceleration correlation algor...

Embodiment 2

[0031] The embodiment of the present invention provides a method for obtaining the terminal movement direction, see figure 2 , the method flow includes:

[0032] 201: Obtain acceleration waveforms of the horizontal axis, the vertical axis, and the vertical axis of the coordinate system of the acceleration sensor in the terminal;

[0033] 202: Convert the obtained acceleration waveforms of the horizontal axis, the vertical axis and the vertical axis of the coordinate system of the acceleration sensor into the geographic coordinate system, and obtain the converted acceleration waveform of the vertical axis of the geographic coordinate system;

[0034] 203: According to when it is detected that the acceleration waveform of the vertical axis of the geographic coordinate system reaches a sine cycle, it is determined that a step counting cycle is completed during the user's traveling process.

[0035] Among them, the process of steps 201-203 is that during the user's normal travel...

Embodiment 3

[0143] An embodiment of the present invention provides a device for acquiring the movement direction of a terminal, see Figure 5 , the device consists of:

[0144]Judgment module 501, for when it is detected that the user completes a step counting cycle while walking, according to the first horizontal projection angle obtained by the electronic compass in the current step counting cycle and the first horizontal projection angle obtained by the electronic compass in the previous step counting cycle The second horizontal projection angle, judging whether the user has turned while traveling;

[0145] The first determining module 502 is configured to calculate the first angle of the pitch angle and the second angle of the roll angle of the terminal's current posture relative to the horizontal plane if it is determined that the user has turned during the journey; according to the first An angle and the second angle, the first target algorithm is selected in the tilting yaw angle ...

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Abstract

The invention discloses a method and a device for acquiring a terminal movement direction, and belongs to the technical field of positioning. The method includes: according to detection that whether or not a user turns when marching forward, selecting an algorithm for determining a current movement direction of a terminal from a tilt course angle algorithm or an acceleration correlation algorithm through a first angle of a pitch angle and a second angle of a roll angle of a current altitude of the terminal relative to a horizontal plane during turning; when the user does not turn, respectively calculating to obtain a difference between tilt course angles and a difference between correlation course angles through the tilt course angle algorithm the acceleration correlation algorithm in a current step-counting cycle and a previous step-counting cycle, and selecting an algorithm for determining the current movement direction of the terminal from the tilt course angle algorithm or the acceleration correlation algorithm. By the method and the device, the defect that a wrong direction is acquired through an electronic compass when terminal location and the movement direction are inconsistent and when a user holds the terminal in hands is made-up, and accuracy in positioning is improved.

Description

technical field [0001] The present invention relates to the field of positioning technology, in particular to a method and device for acquiring a terminal motion direction. Background technique [0002] With the rapid development of positioning technology, terminals with navigation functions have been popularized in every user's life. When the user travels, the user's movement direction can be obtained through the navigation function in the terminal, so as to conveniently guide the user's travel. [0003] When the terminal is navigating, the method of obtaining the direction of movement is as follows: the terminal has an electronic compass built in, the earth's magnetic field is measured through the sensor in the electronic compass, and the direction of true north is determined according to the measured earth's magnetic field, and according to the terminal's projection The angle between the direction of the direction and the true north direction determines the projection di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P13/00G01C21/00
Inventor 邓中亮魏鹏王克己赵晓红张能元谢飞鹏刘倩倩阮凤立安倩
Owner BEIJING UNIV OF POSTS & TELECOMM
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