A method for judging the motion posture of a mobile phone
A determination method and motion attitude technology, which are applied to ground navigation, navigation through velocity/acceleration measurement, etc., can solve the problems of not universal application, increase in calculation error, etc., achieve good applicability, avoid accumulated errors, and have high accuracy Effect
Active Publication Date: 2018-02-16
GUANGZHOU HKUST FOK YING TUNG RES INST
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Problems solved by technology
This method has certain limitations: First, the dead reckoning algorithm is mainly used in large-scale positioning such as navigation. The position of each step is calculated based on the position of the previous step, and the calculation error will increase with time
This method judges the direction based on the instantaneous acceleration, although it avoids the cumulative error, but due to the randomness and complexity of human walking posture, this method is not generally applicable
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[0043] The invention provides a method for judging the motion posture of a mobile phone, comprising:
[0044] S1. According to the real-time data collected by the accelerometer, the gravity accelerometer and the magnetic field sensor, calculate and obtain the real-time three-axis acceleration in the world coordinate system when the mobile phone is moving;
[0045] S2. Use a band-pass filter to filter the real-time three-axis acceleration, and process the acceleration in the horizontal direction and the acceleration in the vertical direction respectively to obtain the walking direction vector of the mobile phone and count the steps;
[0046] S3. Calculate the forward direction vector of the current step, and perform dimensionality reduction processing on the acceleration in the horizontal direction in the direction of the vector;
[0047] S4. After correcting the forward direction vector of the current step, the current position of the mobile phone is obtained by combining step...
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The invention discloses a judgment method for the moving state of a mobile phone. The judgment method comprises the following steps of: according to real-time data acquired by an accelerometer, a gravity accelerometer and a magnetic-field sensor, calculating to obtain real-time three-axis acceleration of the mobile phone in movement under the world coordinate system; using a band-pass filter to filter the real-time three-axis acceleration, respectively processing horizontal-direction acceleration and vertical-direction acceleration, obtaining walking-direction vector of the mobile phone and carrying out step counting; calculating the forward-direction vector of the current step, and carrying out dimension-reducing processing on the horizontal-direction acceleration in the vector direction; carrying out correction on the forward-direction vector of the current step, combining step counting and calculating to obtain the current position of the mobile phone. The judgment method disclosed by the invention has the advantages that the accumulative error can be effectively avoided, the accuracy is high, a user does not need to hold the mobile phone by fixed posture, and the judgment method has good applicability for different users and can be used in various applications such as indoor positioning and walking navigation.
Description
technical field [0001] The invention relates to the field of motion posture positioning, in particular to a method for judging the motion posture of a mobile phone. Background technique [0002] With the popularity of smart phones and the continuous upgrading of hardware, most smart phones integrate various micro sensors such as accelerometers, making the application of walking navigation using mobile phones come true. At present, there are mainly three types of methods for judging the user's motion posture, including walking direction and displacement, through mobile phone sensors: [0003] 1. Dead reckoning algorithm combined with zero-speed correction technology, which uses the known initial position and the moving speed and orientation obtained through integral acceleration data to calculate the existing position, and combines zero-speed correction technology during the calculation process to reduce the cumulative error of the system . This method has certain limitatio...
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IPC IPC(8): G01C21/10G01C21/08
CPCG01C21/08G01C21/10
Inventor 赵然张弢王周红高民
Owner GUANGZHOU HKUST FOK YING TUNG RES INST