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Positioning method for flight light source in traffic tunnel on the basis of white light LED (Light Emitting Diode)

A positioning method and technology in tunnels, applied in the field of visible light communication, can solve the problems of large differences in positioning data, positioning objects affecting positioning performance, and wrongly determining the status of mobile devices.

Active Publication Date: 2019-09-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These characteristics make users face many problems in terms of large differences between positioning data and actual mobile behavior, and wrong determination of mobile device status.
And for the positioning object, it is more difficult to locate the internal signs of the mountain or underground traffic tunnel online map than the open surface space, which brings great challenges to the normal operation of the positioning terminal
Due to the low accuracy of GPS positioning in the tunnel and the flight status of the positioning object will seriously affect the effectiveness of positioning, it has become a priority to study how to make full use of incident light to determine the behavior characteristics of moving targets, avoid or reduce interference, and avoid mobile positioning delays and errors. The important problems to be solved in the design of the positioning system

Method used

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  • Positioning method for flight light source in traffic tunnel on the basis of white light LED (Light Emitting Diode)
  • Positioning method for flight light source in traffic tunnel on the basis of white light LED (Light Emitting Diode)
  • Positioning method for flight light source in traffic tunnel on the basis of white light LED (Light Emitting Diode)

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Embodiment Construction

[0015] The present invention is based on the beam transmitting and receiving system of white light LED, utilizes the long and narrow space in the traffic tunnel to establish a top-down multi-receiver sensing system with an opaque plate, and sets a center vertically upward on the top of the positioning object (unmanned aerial vehicle). LED light source with fixed irradiation and divergent irradiation angle range. Collect the graphic data of different incident angles and different projected areas formed by the same LED light source and opaque plate on multiple receivers, and establish a basic model. Comparative analysis is carried out at the convergence center connecting all receivers to obtain the flight changes of the positioning object in the three-dimensional coordinate system and determine its behavior state. The white light LED positioning method designed on the basis of the above model completely avoids the interference of electromagnetic radiation of electrical equipment...

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Abstract

The invention relates to a positioning method for a flight light source in a traffic tunnel on the basis of a white light LED (Light Emitting Diode). Receivers are evenly arranged on the top in the traffic tunnel, a single receiver has an equal distance with the surrounding adjacent receivers, three mutually-adjacent receivers are in regular triangle arrangement, a non-transparent plate of which the area is smaller than the light beam receiving area is fixed below each receiver; two receivers of which the irradiation dark spots have a biggest light and shade luminance difference with an imageformed by a light source light beam from multiple receivers irradiated by certain positioning object serve as optimal receivers; through a method for positioning the light source according to two coordinate rays, the two optimal receivers judge the areas of a region with strongest illuminance and a region with weakest illuminance as well as a dark spot boundary width range caused by diffraction bya preset threshold value interval, and the position of the positioning object is judged.

Description

technical field [0001] The invention relates to the technical field of visible light communication, in particular to a method for positioning a flying light source in a traffic tunnel based on a white light LED. Background technique [0002] With the development and progress of LED light source technology, white LEDs with the advantages of high brightness, low power consumption, and long life have gradually replaced fluorescent lamps and incandescent lamps. Due to the convenient modulation and quick response of white light LED communication, it has obvious advantages compared with infrared, ultraviolet, radio frequency and other methods in terms of harmless radiation, confidentiality and stability. It has become an emerging visible light communication (VLC) method, which is being gradually promoted to Positioning field in traffic tunnel. The existing LED positioning method can maintain the stability of the channel and has strong operability, but there is no specific model f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16H04B10/116
CPCG01S5/16H04B10/116
Inventor 金杉金志刚崔文
Owner TIANJIN UNIV
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