A Bluetooth-based indoor positioning system and method

Abstract

A bluetooth-based indoor positioning system and method, relating to indoor positioning technology, specifically a system and method for indoor positioning based on the strength of bluetooth signals. The system includes a terminal with a Bluetooth signal sending device, a Bluetooth receiving tag, a positioning management server, and a communication network connecting the Bluetooth receiving tag and the positioning management server. The positioning space is divided into different positioning areas and the Bluetooth receiving tag and positioning reference point are set. The server passes Receive the broadcast information of the terminal, and determine the position of the terminal in the positioning space through regional positioning and precise positioning in the area. The invention overcomes the defect of a single algorithm, reduces the burden of the server, accelerates the positioning speed and increases the capacity of the server.

Description

technical field [0001] The invention relates to indoor positioning technology, in particular to a system and method for indoor positioning based on the strength of bluetooth signals. Background technique [0002] Prisons and detention centers are places for detaining and reforming criminals, and monitoring the behavior of prisoners in custody is an indispensable management method to ensure prison safety. The prison intelligent management system is an important tool to improve the level of prison security and technical defense. It plays an irreplaceable role in supervising the transformation of prisoners and preventing the occurrence of emergencies in prisons. The original intention of the establishment of prisons in our country is the same as that of other countries, which is to realize the labor reform of criminals. Many senior prison administrators believe that the quality of prison management depends on the monitoring. If the monitoring function of the prison is not good...

AI Technical Summary

Problems solved by technology

Only use WIFI and Bluetooth for positioning, and judge the position according to the wireless signal distance loss model, triangular centroid positioning or simple fingerprint point matching. Since the wavelength of the 2.4GHZ wireless signal is decimeter level, it is of the same order of magnitude as the size of indoor objects. The indoor environment is complex, and physical phenomena such as interference, reflection, and refraction are prone to occur, resulting in multipath effects, which cause serious jumps and high instability of received signals in this band, resulting in inaccurate positioning by the above single method

In addition, if all fingerprint points in the entire positioning space are used for matching, the amount of calculation is too large, and it is difficult to guarantee real-time performance when multiple terminals need to be monitored at the same time

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