Indoor WLAN/MEMS fusion cross-stair three-dimensional positioning method

A positioning method, cross-floor technology, applied in positioning, navigation through speed/acceleration measurement, measuring devices, etc., can solve the error up to tens of meters, even hundreds of meters, cumulative error, step length, heading, step The impact of state detection accuracy and other issues, to achieve the effect of improving positioning accuracy
CN104501796AActive Publication Date: 2015-04-08广东北斗天云科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
广东北斗天云科技有限公司
Publication Date
2015-04-08

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Abstract

The invention provides an indoor WLAN / MEMS fusion cross-stair three-dimensional positioning method. The indoor WLAN / MEMS fusion cross-stair three-dimensional positioning method is mainly characterized in that a WLAN / MEMS fusion positioning robust extended Kalman filter is designed, available information of two systems is fully utilized, and resolution of a high-precision two-dimensional position is realized; a height is calculated by using output of a barometer, a geographic position and stair height information, and a position fingerprint database is selected for positioning a wireless local area network (WLAN), and indoor space cross-stair three-dimensional positioning is realized. The system and method are high in positioning precision by introducing robust extended Kalman estimation, and can be used for effectively overcoming an accumulative error existing in positioning of a micro electro mechanical system (MEMS) sensor and received signal strength (position information and actual height information of the previous time) in WLAN positioning to realize indoor space cross-stair three-dimensional positioning.
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Description

technical field

[0001] The invention relates to the technical field of positioning, in particular to an indoor positioning system. Background technique

[0002] With the widespread use of smart terminals, the rapid development of mobile communications, and the rapid increase of data and multimedia services, location-based services (Location Based Services, LBS) are gradually being valued. Especially as the last meter of positioning technology, indoor positioning technology has broad application prospects. For example, in an underground parking lot, you can quickly find a parking space with the help of indoor positioning technology; Personnel can use indoor positioning technology to quickly determine the location of trapped people, so as to quickly rescue; in hospitals, indoor positioning technology can be used to locate patients who need care and so on. Outdoors, the Global Navigation Satellite System (GNSS) can basically meet the requirements of positioning accuracy, but ...

Claims

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