Wireless radio system for indoor localization of people

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The topics related to the location of people and objects is now intensively developing branch of modern technologies. Besides methods used for determining the position using GPS signal and allow the determination of location on the outside environment, people create new solutions that enable indoor navigation of people.

The aim of the thesis is the design and implementation of a system supporting the location of people inside the buildings without the need to use the GPS signal. It consists of three basic components: the electronic transmitters (which work similar to the radio beacons methodology), mobile application installed on a user's phone, allowing the determination of the direction in which the searched location or object is, and a computer program used to design the arrangement of a set of transmitters in the area of the building.

The purpose of the system is to allow the user to easily find it interesting location inside the building, determining the optimal route to your destination. Due to the huge popularity of devices such as the smartphone, the user interface is a mobile application. The program can be installed on devices with Bluetooth and the ability to communicate with the Internet.

A Bluetooth transmitter is used to assist location inside the building by scanning currently available transmitters located within the user's position. The mobile application allows the user to view building plans after which it moves, and the location of Bluetooth nodes placed in the near distance. Therefore, the application has a built-in data communication interface using client-server type to transfer data from computer program to download the settings to use the functionality of the application in buildings.

The main element of the system enables location is the Bluetooth transmitter. The purpose was to embody the device such that it was capable of installation in existing buildings without the need for additional cabling infrastructure. For this purpose, the Bluetooth node has the form of the power supply, directly connected to a mains socket with built-in transmitter signal. The advantage of this solution is the ability to install the transmitter in every room, in which the socket. System can be also used with standard Bluetooth Beacons which are equipped with internal power supply and therefore do not need any additional cables.

The precision of the system supporting the location depends on the correct distribution of transmitters, in order to reach its signal covered areas of space target, and hubs (corridors, staircases) around them, so that the mobile terminal located in the vicinity of transmitters detected signal transmitter, and transformed it into the current location. To that end, we realized a computer application that allows modeling the distribution of transmitters in the building. The program allows you to load maps of buildings, the application of a no transmitters so that its scope precisely covered the area, which indicates the location. The application allows you to set unique identifiers for both the transmitter directly to the nodes and their distribution on the map of the building. Then it is possible to test the correctness of the distribution of the transmitters by carrying out a simulation of Multi-Wall. The computer program allows the client-server communication between the mobile device to send location settings transmitters for the building. In addition, using the RS-232 it is possible to give a unique identifier node Bluetooth.

The system operates according to the following scenario:

1. Bluetooth transmitters send the signal broadcast defining their unique identifier.

2. Mobile application during the scan mode environment finds the currently available transmitting nodes by registering their unique identification numbers together, and the signal strength of the received RSSI.

3. The application presents the user ID of the sending node in the form of a zone on the set of premises to which it was assigned.

 

 

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