Method and system for pedestrian geomagnetic positioning assisted by pedestrian dead reckoning

A technology of dead reckoning and pedestrians, which is applied in the field of navigation and positioning, can solve the problems of complex modeling and large amount of calculation, and achieve the effect of high position matching accuracy and fewer handheld devices for pedestrians

Active Publication Date: 2020-09-08
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI +1
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Problems solved by technology

The positioning method based on magnetic beacons depends on the extensive laying of beacons and human maintenance. The geomagnetic positioning method based on filtering technology requires environmental geomagnetic noise, complex modeling, and a large amount of calculation.

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  • Method and system for pedestrian geomagnetic positioning assisted by pedestrian dead reckoning
  • Method and system for pedestrian geomagnetic positioning assisted by pedestrian dead reckoning
  • Method and system for pedestrian geomagnetic positioning assisted by pedestrian dead reckoning

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Embodiment Construction

[0049] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0050] The present invention provides a pedestrian geomagnetic positioning method assisted by pedestrian dead reckoning, the specific process is as follows figure 1 shown, including the following steps:

[0051] Step 1, establishing a geomagnetic reference library; including the following specific steps:

[0052] S101. Pedestrians are walking on the route where the geomagnetic reference database is established, using a mobile geomagnetic sensor to collect geomagnetic vector data during walking, using a position reference device to obtain spatial geographic coordinate data during walking, and using a mobile accelerometer to monitor pedestrians. Step detection and step length estimation, so as to calculate the mileage information data of the pedestrian walking process. In the embodiment of the present invention, the mobile geomagnetic sensor can be a mobil...

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Abstract

The invention provides a pedestrian terrestrial magnetism positioning method and system assisted by pedestrian dead reckoning, the position matching with high precision is realized by a few of hand-held devices, the positioning requirements of the pedestrian users can be satisfied, and the precision of the positioning can reach the meter level. The method includes two steps of establishing a terrestrial magnetism reference database and real time terrestrial magnetism matching positioning, the earth magnetic field vector data is collected by adopting a movable terrestrial magnetism sensor whenpedestrian walks on the route of establishing the terrestrial magnetism reference base, row space geography coordinate data is obtained by adopting a position reference device, the mileage informationdata is obtained by adopting a movable accelerometer, and the terrestrial magnetism reference database sequence is processed and then obtained. When the pedestrian walks on the real time walking route, the real time earth magnetic field vector data is collected by adopting the movable terrestrial magnetism sensor, the skidding window matching is performed by adopting the earth magnetic field vector data and earth magnetic field vector data in the terrestrial magnetism reference database sequence, and the correlation coefficient is calculated. The corresponding position is regarded as the optimal estimate of the position of the pedestrian when the correlation coefficient is largest.

Description

technical field [0001] The invention relates to the technical field of navigation and positioning, in particular to a dead reckoning-assisted pedestrian geomagnetic positioning method and system. Background technique [0002] Today, with the continuous development of the Internet of Things and the popularity of smart terminals, the user demand for location-based services (LBS) continues to grow. Users urgently need to obtain accurate positioning service information in various scenarios. Nowadays, there are various navigation methods to choose from. Satellite navigation systems such as Beidou navigation system and GPS navigation system are widely used and very important methods. However, When faced with application scenarios such as urban canyons, tunnels, and indoors, satellite navigation faces the problem of signal shadowing, and positioning service users cannot obtain accurate positioning information in this case. [0003] Obtaining precise location information through ne...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/08
CPCG01C21/08
Inventor 魏东岩巩培雯纪新春李雯来奇峰袁洪
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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