Multi-target detecting and identity identification system based on indoor LED light source and method thereof
An LED light source and identification technology, applied in the field of positioning, can solve the problems of inability to provide people with a better experience, low accuracy of radio frequency signals, and unusable positioning equipment.
Pending Publication Date: 2019-04-19
TIANJIN UNIV
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Problems solved by technology
However, the propagation of electromagnetic waves indoors is very complex and changeable, so the indoor positioning technology based on radio frequency signals has low accuracy and cannot provide people with a better experience
At the same time, radio frequency signals will have a certain impact on precision electronic equipment, so positioning equipment using radio frequency signals cannot be used in some special scenarios
In order to overcome the shortcomings of indoor multipath and non-line-of-sight of radio frequency signals, the present invention proposes a multi-target detection and identification system and scheme based on indoor LED light sources
Method used
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[0039] The invention will be further described in detail below in conjunction with the accompanying drawings in the description. This example is only limited to illustrating an implementation method of the invention, and does not represent a limitation on the scope of coverage of the invention.
[0040] Such as figure 1 Shown is a schematic diagram of the scene of the visible light passive positioning system of the present invention. In the area to be located, LED light sources are installed on the roof, and the LED light sources are controlled by the light source control module to time-division multiplex and emit optical signals with identity codes. LED light sources are evenly installed on the roof of the monitoring area, and the number is not less than two. The number of LED light sources can be increased according to the accuracy requirements and the size of the monitoring area. The ground in the area to be positioned is divided into grids with an interval of 1m, and a ph...
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The invention relates to a multi-target detecting and identity identification system based on an indoor LED light source. The system comprises a light source control module, an LED light source, a photoelectric acquisition module, a wireless communication module, a data gathering module and a data processing module. The LED light source is mounted above a monitoring area. The light source controlmodule is used for controlling each LED light source of a certain area to transmit an optical signal with an identity mark code in a time division multiplexing manner. The photoelectric acquisition module is embedded in the floor. Only when the light strength change which is received by the photoelectric acquisition module is higher than a preset threshold, the photoelectric acquisition module communicates with the data gathering module. The data gathering module is used for collecting light strength information transmitted from each wireless communication module. The data processing module isused for processing light strength information which is detected by each photoelectric acquisition module and is received by the data gathering module for acquiring position information and identityinformation of a target. The invention further provides a detecting and identity identification method realized by the system.
Description
technical field [0001] The invention relates to a multi-target detection and identification method based on an indoor LED light source, belonging to the technical field of positioning. Background technique [0002] With China's construction planning of smart cities, the importance and universality of indoor positioning technology has attracted more and more attention. Common positioning technologies require users to carry electronic devices such as mobile phones and sports bracelets. Therefore, positioning technologies based on self-carrying positioning devices are inconvenient and have certain limitations. The purpose of the present invention is to realize a passive positioning technology that the user does not need to carry any electronic communication equipment and can realize user identification. [0003] Today's common indoor positioning technology mostly uses radio frequency devices such as WIFI and Bluetooth to provide people with location information. However, the ...
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Patent Timeline
Login to View More IPC IPC(8): G01S5/16G06K9/00G06K9/62
CPCG01S5/16G06V20/36G06F18/23
Inventor 刘开华张帅
Owner TIANJIN UNIV