Research On Bridge Precision Hoisting Monitoring System Based On UWB Positioning

With its superior positioning performance,UWB positioning technology has become one of the most potential positioning technologies in the field of wireless positioning.Today it is the most widely used wireless positioning technology.The ultra-wideband positioning technology has the characteristics of low power consumption,high multi-path resolution and high positioning accuracy,and has broad application prospects in many aspects such as military and civilian use.At present,most of the current status of bridge lifting at home and abroad is to implement construction technology based on the traditional lifting technology.However,the positioning accuracy of traditional hoisting is low,which cannot meet the requirements of high-precision engineering construction.In this paper,by referring to a large number of documents related to ultra-wideband positioning technology,the relevant technical progress at home and abroad in recent years has been studied,and ultra-wideband wireless positioning technology has been adopted for high-precision positioning of bridges for precise lifting.This article analyzes three methods of UWB positioning from the perspective of aggregation: based on the received signal strength method,based on the angle of arrival,based on the world of arrival,and based on the time difference of arrival,and their respective advantages and disadvantages.By comparison,it is concluded that the time difference of arrival method is the most suitable positioning method for this research topic;the UWB positioning Chan algorithm,Chan-LCCRW algorithm,and Taylor series expansion algorithm principle and formula derivation are introduced;how to expand by Taylor series is introduced The algorithm and Chan-LCCRW algorithm jointly calculate coordinates to obtain high-precision positioning results.The simulation results of the algorithm show that the combined algorithm of Chan-LCCRW algorithm and Taylor series expansion can greatly reduce the error of the positioning result,and can improve the positioning accuracy of the single Chan-LCCRW algorithm or Taylor series expansion algorithm by 15%~ 20%;Finally,the system design of the subject is introduced,and the overall architecture design and module design of the hardware system and software system are introduced.