Research On Location Technology Of Plant Equipment Based On UWB/IMU

With the development of the rail transportation industry,the scale of train production is getting much wider.More and more relevant technologies and equipment has appeared in this field.Due to the wide variety of vehicle products and complex manufacturing processes,more and more attention has been paid to the timely allocation of logistics and transportation equipment and tooling in large production areas,because they want to make the manufacturing process to connect properly in time,to maximize the utilization of equipment and reduce the time of material transportation.Managers use the terminal to view the information about equipment location for improving the efficiency of production management.The ultimate goal is to increase productivity and reduce production costs for enterprises.In the study progress of indoor equipment positioning in the plant,UWB/IMU combined positioning is selected as the research direction.The main work is as follows:First of all,aiming at the inadequacy of relevant equipment positioning supervision,the paper illustrates the application requirements for indoor real-time positioning.Through the description of common indoor positioning technology,this paper analyzes and selects the positioning technology that is suitable for the workshop.On the basis of summarizing the technical features of the UWB(Ultra Wide Band)positioning and IMU(Inertial Measurement Unit)positioning,the factors affecting the positioning accuracy are also analyzed in the following part.In addition,according to the analysis of the simulation results,the number of base stations,which are suitable for device positioning,is selected to explain the layout of the system positioning nodes.Secondly,based on the analysis of the ranging and location algorithm of the UWB,the least square algorithm,which is optimized by particle swarm optimization,is integrated with Taylor series expansion algorithm to improve the positioning accuracy of UWB technology in complex conditions.After analyzing the process of IMU positioning,the error simulation and analysis of the related trajectory,the improved UWB and IMU positioning algorithms are fused by the filter algorithm to realize the combined positioning.The following simulation results showed that the accuracy is improved by the combination of the two algorithms,which can meet the requirements of the plant.Besides,it also has certain advantages for the robustness of the system.Finally,combined with the above positioning algorithm,the research has completed the selection of related positioning hardware,and has conducted the positioning circuit schematic diagram and PCB design,according to the difference of factory functional requirements.Considering the functional requirements of equipment positioning,the mixed programming method is used to design and realize the functions of each module on the positioning monitoring platform.Through the research and application of the UWB/IMU combined positioning system,this paper can free the traditional manufacturing industry from the defects of low supervision efficiency and low equipment utilization.It can also play a positive role in promoting the digital development of enterprises.