| The geographical environment or natural conditions of the transmission line are generally poor,and the location of the transmission line is far away from each other.Most of its environmental and meteorological monitoring adopts traditional methods such as human inspection.It is difficult for personnel to know the operation status of the equipment in real time in the way of regular inspection and maintenance,and the detection accuracy is also difficult to ensure,which is not conducive to timely detection of the hidden dangers of high-voltage transmission lines,so the efficiency is low.With the rapid development of Internet of things technology in recent years,related intelligent monitoring technology research is booming.More and more attention has been paid to the application of environmental meteorological monitoring in the industrial field.Therefore,the intelligent and real-time environmental meteorological monitoring for transmission lines is urgently needed.In order to overcome the shortcomings of 2G/3G/4G communication technology in wireless communication,such as high power consumption,high tariff,relatively limited number of connections,etc.,as well as the weak coverage and limited communication distance of medium and short distance Internet of things transmission technologies such as WiFi,ZigBee,Bluetooth,etc.,this paper focuses on everal wireless communication technologies of LPWA(Low Power Wide Area Network),and after analysis and comparison,the paper finally based on NB-IoT network(narrow band Internet of Things)with the advantages of low power consumption,wide coverage,extensive connection and other technologies to research and develop the NB-IoT wireless sensor system for transmission line environmental meteorological monitoring,and the low-power wireless remote transmission of environmental meteorological state data is reported to the monitoring management system,so as to realize the real-time monitoring of transmission line environmental meteorological information?the monitoring of equipment operation status?visual display and integrated management,which reduces the cost of maintenance and management,and greatly improve the monitoring efficiency.The main contents of this paper are as follows:1.The paper analyzes the key technologies of narrowband Internet of things communication technology,studies the NB-IoT network system architecture,and puts forward the overall scheme design of NB-IoT wireless sensor system for transmission line environmental meteorological monitoring.The system is composed of four parts:sensor terminal,NB-IoT network,static public IP and software monitoring platform.The embedded software of the system is developed by using the sensor terminal based on STM32,communication module bc95,and the low-power processing mode of the system is analyzed.The monitoring of environmental meteorological information and low-power wireless remote transmission are realized.2.The environment and weather online monitoring software system is designed and developed with Java programming language.In the network part,the non directional IP setting of NB-IoT network is realized.The data is received without the third-party platforms,and the monitoring,storage and real-time display of data collection and reporting are realized on the local server system.The software system consists of five modules:integrated situation page,basic data management,real-time data management,alarm management and system management,which realizes the functions of overall management,data export and statistics for each part.3.Under the NB-IoT network environment,the hardware terminal and software part of the environmental meteorological monitoring system are tested and analyzed.The data transmission and power consumption of the system are tested respectively,which verifies that all parts of the system work normally and meet the performance requirements.In this paper,the whole scheme of NB-IoT for transmission line environmental meteorological monitoring is systematized,which improves the technical level and working efficiency of environmental meteorological monitoring,and has high feasibility and practical value. |
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