Compass positioning optimization method and system for mobile terminal

Abstract

The invention discloses a compass positioning optimization method and system for a mobile terminal. The method comprises the steps that when positioning of a compass of the mobile terminal is accurate, acceleration sensor data are read at the moment, and the data serve as benchmark data for accurate positioning of the compass; when a magnetic object is close to the mobile terminal, the precision of a magnetic sensor is affected, and acceleration sensor data are read at the moment; the benchmark data read when the compass positioning is accurate are compared with acceleration sensor data read when the precision of the magnetic sensor is affected; if the two groups of data are approximated to each other, the magnetic sensor produces no response to magnetic disturbance, and positioning of the compass is kept; if not, the magnetic sensor produces a response to the magnetic disturbance, and a user is prompted to calibrate the magnetic sensor. The system comprises a compass precision value detection module, a first data reading module, a second data reading module and a data comparing module. The compass positioning optimization method and system enable the compass to achieve accurate positioning even when the precision of the magnetic sensor is affected.

Description

technical field [0001] The invention relates to a compass pointing optimization method and system for a mobile terminal. The invention belongs to the field of compass calibration of mobile terminals. Background technique [0002] In daily life, people often encounter mobile phones in an environment with strong and changeable electromagnetic interference. The magnetic sensor can detect the magnetic field strength in the current environment. In order to remove the interference, the user often needs to calibrate (for example, in the compass interface Prompt the user to calibrate around the "8" figure). The calibration process is a process of filtering out complex magnetic interference signals in the environment. After calibration, the accuracy of the magnetic sensor data will be greatly improved (for example, if the accuracy value is below 1, it needs to be calibrated, and when the accuracy value is 3, it will not. need to be calibrated), the compass pointing is more accurate...

AI Technical Summary

Problems solved by technology

But when the magnetic sensor is calibrated, the direction of the compass is determined. If the magnetic interference in the environment changes at this time, such as a magnet approaching, or other magnetic objects approaching, the magnetic field of the mobile phone is disturbed again. At this time, the compass The pointing has changed again, but in fact the earth's magnetic field has not changed, which will reduce the pointing accuracy of the compass

[0003] Chinese patent application number 201010002215.9 discloses a method and device for calibrating a terminal compass. In this application, when the accuracy level of the compass does not reach the preset working accuracy level range, automatic calibration is performed according to the movement of the terminal. When the compass is enabled on the terminal, the user needs to be prompted to wave the mobile phone to draw an "8" to perform calibration, which makes it inconvenient to use, and there is no enlightenment to solve the above technical problems

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