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Visible light positioning method and system with double-carrier chaos optimization

A technology of chaos optimization and positioning method, which is applied in the direction of radio wave measurement system, positioning, measuring device, etc., can solve the problem that the positioning accuracy is not very high, and achieve the effect of improving the search speed and positioning accuracy

Inactive Publication Date: 2018-01-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three methods have their own advantages and disadvantages, and the positioning accuracy is not very high

Method used

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  • Visible light positioning method and system with double-carrier chaos optimization
  • Visible light positioning method and system with double-carrier chaos optimization
  • Visible light positioning method and system with double-carrier chaos optimization

Examples

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Embodiment 1

[0055] This embodiment provides a dual-carrier chaos-optimized visible light positioning method. The model diagram for realizing visible light positioning is as follows figure 1 As shown, assuming that the positioning is carried out in an indoor room, the size of the room is 3 meters * 3 meters * 4 meters, and there are 4 lights on the ceiling that provide lighting and serve as signal sources for the visible light positioning system. These 4 LED lights send information containing ID The optical signals of the information are (0,0,4), (0,3,4), (3,0,4) and (3,3,4), and at the same time, the receiving end is located under the light source; The flow chart of the method is as figure 2 shown, including the following steps:

[0056] Step 1. Receive the optical signals from 4 different LED light sources at the receiving end, identify them according to different frequencies and measure the light intensity attenuation factors respectively; at the same time, demodulate the optical sign...

Embodiment 2

[0077] This embodiment provides a dual-carrier chaos-optimized visible light positioning system, the architecture diagram of the system is as follows image 3 As shown, it includes an LED light source and a receiving subsystem, the LED light source includes an LED driving circuit and an LED lamp group; the LED driving circuit provides a bias current for the LED lamp group; the position of the LED lamp group is fixed; the The receiving subsystem includes a photoelectric detection device, a signal demodulation processing module and a display module; the photoelectric detection device can convert optical signals into electrical signals; the electrical signals are processed by the signal demodulation processing module to restore the LED lights The ID position information and the light intensity attenuation factor are obtained; the location area of ​​positioning is obtained according to the ID position information; the precise position coordinates are obtained through the double-car...

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Abstract

The invention discloses a visible light positioning method and system with double-carrier chaos optimization, and relates to the field of visible light positioning. The method includes: determining the positions of LED lamps according to ID information received by a receiving end, of the LED lamps, obtaining the distance between the receiving end and each LED lamp according to an attenuation factor of the light intensity, and determining a three-dimensional coordinate of a positioning point by employing a chaos optimization algorithm; and introducing a dynamic adjusting factor in a secondary carrier process, generating random disturbance by employing a chaos variable, reducing the amplitude of random disturbance with search, and determining the accurate position of the positioning point. According to the method, the positioning process is simple, the calculation amount in the positioning process is reduced through the secondary carrier process, and the positioning accuracy is improved.

Description

technical field [0001] The invention relates to the field of indoor visible light positioning, in particular to a dual-carrier chaos-optimized visible light positioning method and system for improving positioning accuracy. Background technique [0002] In the positioning and navigation market, the Global Positioning System (GPS) is a good outdoor navigation system. With the wide application of positioning and navigation technology and the continuous development of location-based services, indoor positioning technology has gradually entered people's field of vision, and related demands continue to grow, such as item positioning detection in large warehouses, navigation services in large buildings, etc. However, in the global positioning system, because the satellite signal in the city will be blocked by tall buildings, the satellite signal will be seriously attenuated after passing through the wall, as well as the multipath effect and radio interference, it is difficult to ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16G01C21/20
Inventor 吴玉香关伟鹏李方杰谢灿宇
Owner SOUTH CHINA UNIV OF TECH
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