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Visible light positioning method, device and system based on double-frequency orthogonal beacons

A positioning method and visible light technology, applied in positioning, measuring devices, radio wave measuring systems, etc., can solve problems such as insufficient positioning accuracy, achieve the effect of improving accuracy and meeting the requirements of use

Pending Publication Date: 2022-08-05
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, the purpose of the present invention is to provide a visible light positioning method, device and system based on dual-frequency orthogonal beacons to solve the technical problem of insufficient positioning accuracy in existing visible light positioning methods

Method used

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  • Visible light positioning method, device and system based on double-frequency orthogonal beacons
  • Visible light positioning method, device and system based on double-frequency orthogonal beacons
  • Visible light positioning method, device and system based on double-frequency orthogonal beacons

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Embodiment 1

[0067] see figure 2 , which shows the visible light positioning method based on dual-frequency orthogonal beacons in the first embodiment of the present invention, which is applied to a positioning terminal to locate the position of the positioning terminal in an indoor preset positioning area. A plurality of LED light sources are arranged, and the LED light sources can periodically emit a dual-frequency quadrature beacon to the positioning area in the form of pulses, and the dual-frequency quadrature beacon includes two positioning signals of different frequencies and orthogonal, so The method specifically includes steps S01-S03.

[0068] Step S01: Receive the dual-frequency quadrature beacon emitted by the LED light source, and calculate the differential phase of each dual-frequency quadrature beacon currently received, where the differential phase of the dual-frequency quadrature beacon is the dual-frequency positive beacon. The phase difference between the two positionin...

Embodiment 2

[0080] see image 3 , which shows the visible light positioning method based on dual-frequency orthogonal beacons in the second embodiment of the present invention, which is applied to a positioning terminal to locate the position of the positioning terminal in an indoor preset positioning area. A plurality of LED light sources are arranged, and the LED light sources can periodically transmit a dual-frequency quadrature beacon to the positioning area in the form of pulses, and the dual-frequency quadrature beacon includes two positioning signals of different frequencies and orthogonal, so The method specifically includes steps S11 to S18.

[0081] Step S11, receiving a dual-frequency quadrature beacon emitted by the LED light source.

[0082] In a specific application scenario of this embodiment, a total of 16 LED light sources are arranged indoors. First, reasonable installation coordinates (Tx) need to be allocated to the LED light sources. i , Ty i , Tz i ), i=1, 2, 3.....

Embodiment 3

[0131] Another aspect of the present invention also provides a visible light positioning device based on dual-frequency orthogonal beacons, please refer to Figure 4 , applied to a positioning terminal to locate the position of the positioning terminal in a preset indoor positioning area, where a plurality of LED light sources are arranged indoors, and the LED light sources can periodically emit pulses to the positioning area Dual-frequency orthogonal beacon, the dual-frequency orthogonal beacon includes two orthogonal positioning signals with different frequencies, and the visible light positioning device based on the dual-frequency orthogonal beacon includes:

[0132] The signal receiving module 11 is used to receive the dual-frequency quadrature beacon emitted by the LED light source, and calculate the differential phase of each dual-frequency quadrature beacon currently received, where the differential phase of the dual-frequency quadrature beacon is the phase difference b...

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Abstract

The invention provides a visible light positioning method, device and system based on double-frequency orthogonal beacons, and the method comprises the steps: receiving the double-frequency orthogonal beacons transmitted by an LED light source, and calculating the differential phase of each currently received double-frequency orthogonal beacon; calculating the time difference of the double-frequency orthogonal beacons according to the differential phases of the double-frequency orthogonal beacons; and calculating the position coordinates of the positioning terminal in the positioning area according to the time difference of each dual-frequency orthogonal beacon and the coordinate information of each LED light source. According to the invention, the dual-frequency orthogonal beacons are transmitted to the positioning terminal, and the positioning terminal measures the phase information of the dual-frequency orthogonal beacons transmitted by the LED light sources, so that the differential phase and the propagation time difference of the dual-frequency orthogonal beacons transmitted by the LED light sources in the propagation process are obtained; and indoor visible light positioning is realized in combination with a geometric positioning method, the propagation time of signals does not need to be measured, the indoor visible light positioning precision is greatly improved, and the use requirement of indoor high-precision positioning is met.

Description

technical field [0001] The present invention relates to the technical field of indoor positioning, in particular to a visible light positioning method, device and system based on dual-frequency orthogonal beacons. Background technique [0002] With the rapid development of smart phones and mobile Internet, people's demand for positioning and navigation services is increasing day by day. People spend most of their lives indoors, and a large number of personal users, enterprise production machines, IOT devices, etc. The positioning requirements of the mobile phone also occur indoors; however, because the indoor scene is blocked by buildings, the global navigation satellite positioning system (GNSS) signal is rapidly attenuated, or even not at all, which cannot meet the navigation and positioning requirements in the indoor scene. [0003] At present, LED-based visible light positioning is a very popular industry development and research topic. In the visible light-based indoor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16
CPCG01S5/16Y02D30/70
Inventor 王正海梅佳能陈铭钧余礼苏王玉皞张胜雷恺
Owner NANCHANG UNIV