Research On Intelligent Evaluation System For Accurate Positioning Of Mobile Vehicles

In recent years,many cities have begun to promote "smart cities",which mainly use advanced information technology to manage cities intelligently.As an important part of the "smart city",intelligent transportation is developing rapidly.And autonomous driving,as an important research direction of intelligent transportation,has become a research hotspot at home and abroad.In addition,the trajectory of aircraft dispatching at the airport,the trajectory of large-scale terminal vehicles transporting goods,and the above-mentioned autonomous driving trajectory all require precise tracking and positioning and evaluation of the trajectory.This subject has developed an intelligent evaluation system for precise positioning of mobile vehicles based on BDS and IDS,which uses Beidou technology to track and locate the vehicle’s trajectory in real time,and uses IDS algorithm to evaluate the vehicle’s trajectory.The specific research content of this article is as follows:(1)In order to design the intelligent evaluation system for precise positioning of mobile vehicles,this paper studied the principle of BDS positioning,common coordinate systems for navigation and positioning,and coordinate conversion between each coordinate system,related technologies to achieve high-precision positioning,Kalman filtering algorithms,and Related target motion models,etc.(2)We have designed the hardware and developed the software required for the intelligent evaluation system for precise positioning of mobile vehicles.A fixed base station and a mobile base station with the host M66 as the core device have been built,and high-precision vehicle tracking and positioning have been realized by combining RTK technology and EKF algorithm.Based on the Android system,multiple modules have been developed to realize functions such as sign-in,map collection,vehicle model collection,and trajectory evaluation.(3)The IDS algorithm was proposed to realize the judging function of vehicle trajectory.The algorithm used 8-bit binary grayscale modeling on the parking lot map,and wrote the three judgment rules of different parking path selection,total parking time,and whether to pass obstacles,so as to effectively realize judging function of vehicle trajectory.(4)Experiments have verified the effectiveness and stability of various functions of the intelligent evaluation system for precise positioning of mobile vehicles.The dynamic error experiment and the positioning accuracy comparison experiment with the GPS system have proved that the positioning accuracy of the system can reach the centimeter level;the effectiveness of the IDS algorithm has been proved through multiple driving skills evaluation experiments on the simulated field...