A sensor-assisted combined terminal positioning method and device

Abstract

The invention discloses a sensor-assisted terminal combination positioning method and a sensor-assisted terminal combination positioning device, belonging to the technical field of space positioning. The method comprises the following steps: obtaining a positioning coordinate by a WLAN (Wireless Local Area Network), WSN (Wireless Sensor Network) and GPS (Global Position System) wireless positioning and satellite positioning technology; measuring a walking step number of a time difference between the current positioning and the last positioning of a person to be positioned by using an accelerometer; calculating a moving speed of the person to be positioned according to a pre-estimated step length; filtering the result of the current positioning by a filtering algorithm to obtain an accurate coordinate of the current positioning and a moving speed in each direction; and combining the moving speeds with the positioning technology to realize the next positioning. According to the sensor-assisted terminal combination positioning method and the sensor-assisted terminal combination positioning device, the positioning precision is improved to 3m-5m from 5m-10m under the condition of not additionally arranging a hardware facility, so that the service quality of indoor and outdoor seamless positions can be improved greatly; a new business of position services is expanded; the sensor-assisted terminal combination positioning method and the sensor-assisted terminal combination positioning device can be applied to the fields including public safety, emergency rescue, production safety, Internet of Things, smart cities and the like and can obtain important social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of space positioning, and relates to a sensor-assisted combined terminal positioning method and device. Background technique [0002] According to statistics, more than 80% of the information used by people is related to "location". With the development of mobile Internet technology, the location service (Location Based Servers, LBS) technology and market will be developed rapidly. With the vigorous development of LBS and the increasing number of large buildings, people's demand for indoor and outdoor seamless location services continues to increase. Public security, emergency rescue, anti-terrorism, production safety, Internet of Things, special population care, smart cities and other fields Both also need to use accurate location information. [0003] Satellite navigation systems such as GPS and Beidou have achieved outdoor positioning, but they cannot achieve indoor coverage. In recent years, in-depth r...

AI Technical Summary

Problems solved by technology

[0005] However, at present, the electronic compass pointing of many mobile phones is not accurate, with an error of more than 40°, and sometimes the direction of human movement is not consistent with the electronic compass pointing (such as holding the mobile phone upside down, walking backward, etc.)

The above situation will lead to a large error in the judgment of the direction of pedestrian movement. At this time, the sensor-assisted positioning using the traditional method will not only fail to improve the positioning accuracy, but may even lead to a decrease in positioning accuracy.

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