Research On Bicycle Riding Safety Based On UWB Positioning System

China is a traditional big country of bicycles,and it has occupied a certain proportion in the structure of urban traffic in the past.With the impact of the spread of the new crown epidemic,in order to reduce the close contact with others,the proportion of trips by bicycle has further increased.The increase in the proportion of bicycles has also increased the number of traffic accidents caused by bicycles.At present,the main body of traffic safety research in domestic and foreign research is mainly concerned with motor vehicles,and there are not many studies on bicycles.Faced with potential risk factors,traffic authorities need to take appropriate measures to improve cycling safety.In motor vehicle safety research,there are many studies based on the speed and trajectory of motor vehicles,and this method can also be applied to bicycles.Therefore,the development of a system that can locate real-time data is very important for bicycle riding safety research.acquisition is significant.Based on the above background,this paper selects UWB technology as the main positioning system in this paper after comparing the current positioning methods,and selects the inertial navigation system to supplement it.The main research contents of this paper are as follows:1 Conduct analysis and research on UWB technology,determine the ranging algorithm and positioning algorithm required in the experimental scene,and analyze the error in UWB positioning technology.Summarize the IMU technology,understand the working principle of the sensor and the coordinate system transformation,attitude calculation and navigation calculation that exist in the navigation process,and finally analyze the measurement error of the IMU technology,and then determine that the two systems are in the experimental scene.The source of error that needs to be addressed.2 According to the functional requirements required in the experimental scene,the overall design of the system was carried out,and the hardware modules of the system were determined.For the problems existing in the data fusion of the two systems,it was determined to use adaptive Kalman filtering,and Kalman was determined.The filtering method of filtering,the correction method of error,the combination method of the system and the parameters in the system filtering equation.3 The main scene of bicycle traffic accidents is the intersection without signal control.This paper sets this scene in the experimental site and determines different experimental schemes.The positioning trajectory results obtained in the test experiments show that the UWB/IMU positioning system can meet the requirements of safety experiment accuracy after adaptive Kalman filtering.After experiments in different scenarios,the experimental results were analyzed by statistical methods,and the results showed that in different experimental schemes,the linear transformation can effectively reduce the riding speed,thereby ensuring the safety of riding.