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Indoor positioning system and method based on Bluetooth and MEMS (Micro-Electro-Mechanical Systems) fusion

An indoor positioning and Bluetooth technology, applied in the field of positioning, can solve the problems of short positioning distance and small coverage

Active Publication Date: 2016-05-18
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the disadvantage of the Bluetooth system is that the coverage area is small and the positioning distance is short.

Method used

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  • Indoor positioning system and method based on Bluetooth and MEMS (Micro-Electro-Mechanical Systems) fusion
  • Indoor positioning system and method based on Bluetooth and MEMS (Micro-Electro-Mechanical Systems) fusion
  • Indoor positioning system and method based on Bluetooth and MEMS (Micro-Electro-Mechanical Systems) fusion

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Embodiment Construction

[0054] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] Such as figure 1 As shown, the indoor positioning system based on the fusion of Bluetooth and MEMS proposed by the present invention includes a Bluetooth fingerprint positioning module 1, a MEMS positioning module 2, an extended Kalman approximation particle filter module 3 and a positioning result display module 4; The positioning module is respectively connected with the extended Kalman approximation particle filter module, and the extended Kalman approximation particle filter module is connected with the positioning result display module.

[0056] The Bluetooth fingerprint positioning module first completes the generation of the Bluetooth fingerprint database in the offline stage, that is, a plurality of anchor points are arranged in the indoor experimental area, and the RSS data sent by the user Bluetooth module in the indoor envir...

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Abstract

The invention discloses an indoor positioning system and method based on Bluetooth and MEMS (Micro-Electro-Mechanical Systems) fusion. A particle filter for Bluetooth / MEMS fusion positioning is designed, usable information of two subsystems is sufficiently utilized, wherein a Bluetooth system matches and acquires information of a user on line after off-line database building, and an MEMS combined system acquires position prediction information of the user through course angle calculation and dynamic step length estimation; an extended Kalman approximate particle filter is taken as a fusion navigation filter, user position information data of the two subsystems are fused, a state equation and an observation equation are constructed by reasonably selecting the state variable and the observational variable, finally, the optimal user position information is obtained, and indoor accurate positioning is realized. Through Bluetooth / MEMS indoor fusion positioning, the defects that a conventional indoor positioning system is low in positioning accuracy, the equipment cost is high, the coverage range is narrow, the positioning continuity is poor and the like can be overcome.

Description

technical field [0001] The invention belongs to the technical field of positioning, and in particular relates to an indoor positioning system and method based on the integration of bluetooth and MEMS. Background technique [0002] With the development of human society, people have more and more needs for their own location, and society has developed many positioning methods and systems. For example, the global satellite positioning system can provide humans with more accurate outdoor positioning. And there is a serious multipath effect, so that the accuracy of indoor satellite positioning is seriously reduced, and even the normal positioning cannot be performed. However, with the widespread use of smart terminals and the rapid development of mobile communications, accurate indoor positioning has gradually received attention. Especially as the last meter of positioning technology, indoor positioning technology has broad application prospects. For example, in some large shop...

Claims

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Application Information

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IPC IPC(8): G01C21/18G01S11/06H04W4/04
Inventor 田增山金悦李泽吴自鹏周牧林天瑜王影张振源王斌王阳
Owner CHONGQING UNIV OF POSTS & TELECOMM
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