Mobile vehicle positioning method based on visible light communication
A technology for visible light communication and vehicle positioning, applied in positioning, image data processing, measurement devices, etc., can solve problems such as image blurring and affect the positioning accuracy of moving vehicles, and achieve low cost, high-precision positioning, and simple principles.
Inactive Publication Date: 2020-08-07
HUNAN UNIV
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Problems solved by technology
However, when the moving vehicle is driving at high speed, the image information of the LED array lights received by the camera will be interfered by other signal sources, and the jelly effect will cause the image to be blurred, which will affect the positioning accuracy of the moving vehicle
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[0032] The present invention will be described in detail below in conjunction with specific experimental examples and accompanying drawings.
[0033] figure 1 Shown is the mobile vehicle positioning method based on visible light communication of the present invention. The sending end is a square LED array light on the side of the road, and the LED array light sends an information code showing the position of the LED array light. After free space transmission, the receiving end is the camera placed on the moving vehicle, and the camera is used for reception. For the images received by the camera, image processing algorithms, including image preprocessing methods and effective selection algorithms, are used to obtain effective LED array lights. Then, the position information code of the effective LED array lights is identified, and the distance between the moving vehicle and the effective LED array lights is calculated based on the geometric ranging algorithm of pinhole imagin...
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The invention discloses a moving vehicle positioning method based on visible light communication. The sending end is a roadside square LED array lamp, the LED array lamp sends an information code of adisplay position, through free space transmission, the receiving end is a camera placed on a moving vehicle, and the camera is adopted for receiving. For a moving vehicle, the position information ofthe moving vehicle is positioned by receiving the position information code sent by the roadside LED array lamp through the camera placed on the moving vehicle. Because more than one effective position information code exists in the sight distance range, firstly, an image processing algorithm is adopted and comprises an image preprocessing method and an effective selection algorithm, and an effective LED array lamp is obtained. For the influence of the jelly effect, the convolutional neural network is used to identify the position information code of the effective LED array lamp. And finally,the distance between the moving vehicle and the effective LED array lamp is calculated by adopting a geometric ranging algorithm based on pinhole imaging, and high-precision positioning of the movingvehicle is realized according to the identified coordinate information of the position information code of the effective LED array lamp. The mobile vehicle positioning method based on visible light communication provided by the invention is simple in principle and low in cost, can realize high-precision positioning of the mobile vehicle, and has a practical value.
Description
[0001] (1) Technical field [0002] The invention belongs to a mobile vehicle positioning method based on visible light communication in a visible light communication (Visible-Light-Communication, abbreviated as VLC) system. [0003] (2) Background technology [0004] In recent years, light-emitting diodes (LEDs) are increasingly used in screen display panels, traffic lights and road lighting, which have the characteristics of lower power consumption, high temperature tolerance and less heat generation than incandescent lamps. Outdoor LED array lights can be used not only for lighting and signage, but also for visible light communication. [0005] With the development of intelligent transportation, the positioning technology of moving vehicles has attracted attention. At present, the widely used Global Positioning System (GPS) has a meter-level error in positioning accuracy in an open environment, and the positioning accuracy will be greatly reduced when there are buildings or...
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IPC IPC(8): G01S5/16H04B10/116G06T7/70G06T5/30G06T5/00
CPCG01S5/16H04B10/116G06T7/70G06T5/30G06T2207/20084G06T2207/30252G06T5/73G06T5/70
Inventor 何晶唐旷
Owner HUNAN UNIV