Research On WSN Based Wind Speed Monitoring And Train Wind Induced Safety Warning Along Lanzhou-Wulumuqi High-Speed Railway

Lanzhou-Wulumuqi High-speed Railway passes through the windy areas with extremely severe wind disasters.Strong winds pose a serious threat to the safe operation of trains.Carrying out wind speed monitoring in key wind areas along the Lanzhou-Wulumuqi High-speed Railway and train wind-induced safety warning research has important application value for improving the wind speed monitoring along the Lanzhou-Wulumuqi High-speed Railway and ensuring the safe operation of vehicles in strong wind areas.It proposes a wind speed monitoring system based on the ZigBee wireless sensor network for the dangerous sections of the windy area along the Lanzhou-Wulumuqi High-speed Railway,studies the optimal deployment of wireless sensor network nodes,and analyzes and discusses the early warning problems of train wind-induced safety.The specific research content has the following four aspects:(1)The overall structure design of the ZigBee wireless sensor network monitoring system in the windy area.The system structure,node structure,routing protocol and application fields of the wireless sensor network are summarized.The ZigBee technology based on the radio frequency chip CC2530 is used to construct the WSN wind speed monitoring system in the windy area along the Lanzhou-Wulumuqi High-speed Railway.The monitoring network is distributed in a strip structure.The nodes are networked through the ZigBee communication protocol and connected to the ground convergent node.The convergent node transmits the sensed information to the monitoring center in a multi-hop relay mode.(2)Optimized deployment scheme of wireless sensor network nodes for wind speed monitoring in windy areas along the Lanzhou-Wulumuqi High-speed Railway.Study the deployment strategy of the band wireless sensor network in the monitoring area,aiming at the problem of effective coverage of the target area by the sensor nodes,adopt the deterministic polygon deployment method,and study the use of determinism while ensuring the full coverage of the monitoring area and the requirements of data transmission The coverage model of polygon deployment determines the relationship between the number of sensor nodes,redundant coverage and the communication radius of nodes.In addition,appropriate heterogeneous nodes are deployed in the network,and the optimal number of sink nodes is determined by solving the maximum value of the network lifetime cost ratio RLC,so as to minimize the network cost while extending the network lifetime.(3)Evaluation index for optimal deployment of wireless sensor nodes in windy areas based on AHP fuzzy inference.Comprehensively consider the impact of wind factors and line terrain factors on the actual deployment,analyze the evaluation factors such as its coverage method,node energy consumption and service life,and establish a fuzzy inference model based on AHP analytic hierarchy process: first determine the factor weights,and then calculate The membership function of each layer factor is finally transformed into reliability,and the final comprehensive evaluation index is obtained,which provides a reference for the deployment of actual nodes.(4)Discuss the early warning of the safety speed limit of the Lanzhou-Wulumuqi High-speed Railway for train wind-induced safety.The design of the early warning system for speed limit in Baili wind area based on train wind safety is proposed.First,by studying the main operating indicators and speed limit criteria that affect trains in the Baili wind area,the speed range for safe driving of the following cars at different road sections and different wind speeds in the wind area is set,and then based on the real-time wind speed data of the WSN monitoring system in the wind area,the line The running train provides accurate and reasonable speed limit warning information.The WSN gale monitoring system and train speed limit early warning scheme constructed in the thesis have certain engineering reference value.