Multi-source combined indoor location method based on UWB and VLC

An indoor positioning and technology technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of reduced accuracy and long initial alignment time

Active Publication Date: 2018-09-04
TONGJI UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the inertial positioning error increases with time, long-term use will result in reduced accuracy, and requires a long initial alignment time before use

Method used

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  • Multi-source combined indoor location method based on UWB and VLC
  • Multi-source combined indoor location method based on UWB and VLC
  • Multi-source combined indoor location method based on UWB and VLC

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Embodiment Construction

[0061] A multi-source joint indoor positioning system based on UWB and VLC technology, mainly including UWB equipment, VLC equipment, and positioning terminals. The positioning terminal includes a UWB positioning terminal, a VLC positioning terminal and a data fusion unit. The UWB and VLC positioning terminals are composed of their own LOS / NLOS judgment modules and data processing units. Such as figure 2 shown.

[0062] The positioning code information generated by the VLC device is loaded to the driving current of the LED lamp by pulse width modulation, and emitted in the form of visible light, and each LED at a certain distance corresponds to a unique ID code information, and the positioning code information is based on time division multiplexing. Use technology. When the user enters the lighting area of ​​the lamp, the LOS / NLOS discrimination module in the VLC positioning terminal compares the signal strength with the threshold based on the light coded signal received b...

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Abstract

The present invention provides a multi-source combined indoor location method based on a UWB (Ultra WideBand) and a VLC (Visible Light Communication), and relates to the technical field of indoor location. The problem is solved that long-term usage of a location system causes low precision. The location system comprises a UWB device, a VLC device and a location terminal. The location terminal comprises a UWB location terminal, a VLC location terminal and a data fusion unit; and the UWB location terminal and the VLC location terminal are formed by LOS/NLOS (Line of Sight/Non-Line of Sight)determination modules and data processing units. The multi-source combined indoor location method can achieve indoor seamless high-precision location, can reduce the disturbing influence of the location system on other communication systems, has no harm for a human body, can improve the system privacy, can improve the high-speed communication possibility, and can be widely applied.

Description

technical field [0001] The invention relates to the technical field of indoor positioning. Background technique [0002] With the rapid development of modernization, the number of large buildings is increasing, including a large number of large-scale comprehensive commercial centers, office buildings and other densely populated areas integrating shopping, leisure, catering, entertainment, office and other functions. Due to the complex environmental structure of such places and people's limited knowledge of the area, it is easy to cause great safety accidents and economic losses in the event of a dangerous situation, and it also increases the difficulty of rescue. Therefore, the refinement, accuracy, and seamlessness of indoor positioning are particularly important. At the same time, facing people's ever-increasing bandwidth demands, how to realize high-speed wireless access also needs to be considered in such densely populated areas. [0003] At present, there are roughly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S5/14G01S5/16H04B10/116H04W64/00
CPCG01S5/0257G01S5/14G01S5/16H04B10/116H04W64/006
Inventor 何斌陆萍李鑫
Owner TONGJI UNIV
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