Research On The Methods And Techniques For Improving LED Indoor Positioning Accuracy

As is know to all,with the rapid development of 4G communication technology and Internet technology,current society has entered the era of "Internet of everything",which promotes the prosperity of the Internet economy.In large-scale supermarkets,underground garages,warehouses and other rooms,the demand for the interconnection and fast and accurate positioning of people and vehicles,commodities and goods is becoming more and more urgent,which promotes the rapid development of indoor positioning technology.Among the many indoor positioning technologies,LED indoor positioning technology takes into account the needs of both lighting and positioning,and accords with the national requirements of energy conservation and environmental protection,so it has been widely studied,and has become one of the research hotspots of indoor positioning technology.At present,the methods and techniques to improve the accuracy of LED indoor positioning is the research focus.In this thesis,a single lamp ranging technology was developed based on the illuminance attenuation law of a single LED lamp;On this basis,the principle and method of three-lamp combined accurate positioning were studied,and a scheme to further improve the positioning accuracy was put forward.In combination with the layout of large indoor lighting LED lamp array,the indoor positioning technology scheme of LED with strong anti-interference ability was studied and put forward,and the related verification experiments were carried out.The experimental results show that the proposed indoor positioning scheme in this thesis has the ability of anti-interference.The experimental results also show that the positioning accuracy is up to 5cm using this "Twostep" indoor positioning solution based on red LED scheme.The research of this thesis promotes the practicality of LED indoor positioning technology greatly.The specific contents of research are as follows:(1)Put forward the illuminance ranging method and measurement error control principle of LED lamp based on the illuminance attenuation law of LED light source;(2)Propose a multi-combination combined positioning algorithm to further improve the positioning accuracy of the three LED lights positioning method;(3)Propose the fast and accurate positioning method and technology of white LED assisted with infrared LED.This method and technique has anti-interference ability immune to the interference from the adjacent LED lamp in the indoor lighting LED lamp array;(4)An indoor environment of 4m×4m×3m was built to carry out the indoor positioning experiment of the LED lamp array,and related experiments were performed to verify the feasibility of the method and technology for improving the indoor positioning accuracy of the LED proposed in this thesis.