System and method for accurately positioning wireless sensor network

Abstract

The embodiment of the invention discloses a system and a method for accurately positioning a wireless sensor network and is applied to the field of communication. The system comprises one or more positioned objects and a server, wherein each positioned object comprises an identification card used for performing information interaction with one or more wireless card readers which are arranged in a wireless card reading base station; respective relative distance relative to each wireless card reader is measured by using a symmetrical double-sided two-way ranging (SDS-TWR) algorithm; and the server is used for calculating and determining a coordinate position of each identification card by using a semidefinite programming algorithm according to the relative distance. Due to the SDS-TWR positioning technology and the semidefinite programming algorithm, the system has the advantages of high stability, high positioning accuracy, high operating rate and high expandability, is applicable to indoor accurate positioning, such as accurate positioning for underground coal mines, prison staff, commercial building personnel and assets and the like, and is also applicable to outdoor positioning, such as positioning in intelligent vehicle management, outdoor security patrol and the like.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a wireless sensor network precise positioning system and method. Background technique [0002] In recent years, the demand for accurate positioning has been increasing. Although GPS can obtain good positioning accuracy, in indoor environments, the GPS signal attenuates greatly, making it impossible to perform accurate positioning. In addition, GPS is also easily affected by external factors such as weather outdoors. Therefore, in situations where GPS cannot be positioned, other technical solutions need to be used instead of GPS, such as indoor precise positioning. The indoor positioning market has a large demand, and typical applications include precise positioning in coal mines, prison personnel positioning, and personnel asset positioning in specific buildings. [0003] Taking the coal mine underground personnel positioning system as an example, it should be able to tim...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the embodiments of the present invention is to solve the problems existing in the above-mentioned background technology, and propose a wireless sensor network precise positioning system and method to solve the problem of low indoor positioning accuracy in the prior art, or to achieve higher positioning accuracy. Higher cost and thus lower scalability issues

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