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Indoor LED visible light positioning method, system and device

A positioning method and positioning system technology, applied in the field of visible light communication, can solve the problems of LED light source luminous intensity fluctuations, low ranging accuracy, multi-path reflection interference, etc., to eliminate adverse effects, improve calculation efficiency, and reduce variable calculations Effect

Pending Publication Date: 2018-05-15
BAISE UNIV
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Problems solved by technology

[0003] The object of the present invention is to provide an indoor LED visible light positioning method, system and device for the above problems. and the influence of fluctuations in the luminous intensity of LED light sources, a time-division multiple access indoor positioning method based on LED light sources is proposed. High-precision ranging, so as to realize three-dimensional high-precision visible light positioning in indoor environments

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  • Indoor LED visible light positioning method, system and device
  • Indoor LED visible light positioning method, system and device
  • Indoor LED visible light positioning method, system and device

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Embodiment Construction

[0038] The specific implementation of the invention will be further described below in conjunction with the accompanying drawings.

[0039] Such as figure 1 As shown, an indoor LED visible light positioning system includes a sending end 1 and a mobile positioning terminal 2;

[0040] The sending end 1 includes a synchronization module 11, a positioning frame forming module 12, a signal modulation module 13, an LED driving module 14, and an LED light source array 15; the positioning frame forming module 12 sets and stores positioning frames corresponding to each LED light source, and signal modulation The module 13 and the LED driver module 14 complete the conversion of the positioning frame signal into a visible light pulse digital sequence, and each LED light source is assigned a unique beacon code; the synchronization module 11 provides an accurate time reference for each module, so that each module can work together to ensure that each LED The light source periodically sends...

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Abstract

The invention discloses an indoor LED visible light positioning method, system and device, belonging to the technical field of visible light communication. The method includes the following steps: LEDlight sources are set indoors as base stations, and the LED light sources are coded; positioning frames are generated through positioning frame forming modules of the LED light sources, each positioning frame includes a ranging pulse, a beacon code and coordinate data, each ranging pulse includes a preamble code and a periodic pulse, and a positioning frame signal is sent to a positioning terminal through the time division multiple access technology; the positioning terminal receives the positioning frame signal, and decodes the positioning frame signal to obtain the coordinates, beacon codeand delay difference of each LED light source; the coordinates of a target to be positioned are determined through a double-curve positioning algorithm; and the coordinates of the target to be positioned are corrected through a phase method. The indoor LED visible light positioning method, system and device are used to position a robot, a mobile location terminal or the like in an indoor environment.

Description

technical field [0001] The present invention relates to the technical field of visible light communication, in particular to an indoor LED visible light positioning method, system and device. Background technique [0002] LED-based visible light communication positioning technology has outstanding advantages such as wide indoor coverage, energy saving, safety, simple layout, low cost, and good electromagnetic compatibility. At present, the technologies for realizing visible light indoor positioning mainly include methods based on received visible light signal strength indication, frequency division multiple access positioning methods, imaging methods, and fingerprint recognition methods. At present, indoor visible light positioning methods with high positioning accuracy require direct ranging. By measuring the distance between the LED light source of the base station and the target point to be positioned, the position information of the point to be positioned is calculated f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16H04B10/116
CPCH04B10/116G01S5/16
Inventor 卢洪斌
Owner BAISE UNIV
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