Design And Implementation Of Operator Tracking And Positioning System On Electric Power Field

Electric power operations are complex and dangerous,prone to safety accidents.With the increasing workloads of different power operations and maintenances in substations and other electric power fields,it's significant to establish a tracking system to improve personnel safety and work efficiency for electric power operation,which is based on wireless sensor network to collect and transmit personnel or environment information.The UWB signal has the characteristics of high transmission rate and high time resolution.Therefore,in this paper,it is combined UWB technology to research the wireless collaborative networking and positioning of devices for electric power operations,and develops a tracking and positioning system to achieve accurate location tracking for personnel and effective transmission of information.The research works and results of this paper include:(1)First,analyzed the needs and core functions of the electric power operator positioning system,and proposed the overall design scheme and design framework of the system.Using the STM32 chip as the microprocessor,developed the positioning base station,gateway base station and tag around the UWB transceiver DWM1000,build the hardware platform for the positioning system.The gateway base station integrates the gateway function,which can simplify the system structure.(2)In the terms of system software,first of all,due to the short propagation distance of UWB signals,most of the UWB positioning research currently is limited to a small range,cannot be effectively applied.In order to flexibly expand the positioning range,in this paper,it is designed a method of cooperative self-organization between base stations based on flooding strategy,introduces TDMA technology to divide UWB communication time slots to avoid signal collision,implements clock synchronization between devices based on FTSP algorithm,and then uses an improved RIP algorithm to dynamically generate routes.This method can not only dynamically add and remove base stations and tags,but also realized the integration of positioning and data transmission,that make full use f channel resources.Finally,the simulation results confirm the correctness and feasibility of the method.(3)In the positioning method part,first optimize the ADS-TWR ranging algorithm,that adjust the information exchange order,so that the tag can freely select the ranging base stations,reduce the number of information transmission and shorten the ranging time without reducing the ranging accuracy.Aiming at the still existing ranging error,used the linear fitting to improve the ranging accuracy by 46.41%.Aiming at the problem that the traditional TOA positioning algorithm is susceptible to NLOS factors and the accuracy is not high,proposed a Taylor fusion positioning algorithm based on trilateration positioning,which the weight factor is introduced and an evaluation function was constructed to solve iterative divergence.Experimental data proves that the positioning algorithm has high accuracy,RMSE is less than 14 cm,which is 24.33% higher than the better-performing trilateration positioning algorithm,and the calculation speed has not been significantly reduced by iteration.The tracking and positioning system of electric power operator,which has stable operation,high precision,flexible expansion and wireless transmission network,established a basic monitoring platform for the expansion of personnel safety prevention and control.