Research On Ground Wire Monitoring Solution Of Bridges And Tunnels Based On WSN Technology

Ground wire is used to ground earth electrodes of electrical equipment in high-speed railway system, it plays an important role in railway safety and anti-interference. However, it happens frequently that the ground wire was stolen or damaged around some bridges and tunnels where the ground wire cannot be laid underground. This will threaten the railway safety and have a bad influence on other equipment or cables along the railway if it is not found and repaired in time. So it has a very important significance to research in ground wire monitoring system. In this paper, put forward and designed a ground wire monitoring solution based on WSN, and analyzed its anti-interference ability in the environment of electrified railway. The main work of this paper include the following three aspects:Firstly, the facing problems of MAC protocol in WSN were analyzed, and a multi-channel MAC protocol in WSN based on IEEE802.15.4/ZigBee protocol was put forward. It theoretically solved the problem of interference from the WSN itself.Secondly, a ground wire monitoring solution with WSN based on IEEE802.15.4/ZigBee protocol was put forward with monitoring equipment, network topology, sleep timer mechanism and data format detailed designed.Lastly, the anti-interference ability of IEEE802.15.4/ZigBee protocol was analyzed, and the reliability of data transmission in the environment of electrified railway was simulated with Simulink Toolbox. The result proved that the WSN based on IEEE802.15.4/ZigBee protocol has a very strong anti-interference ability, and it can satisfy the requirement of the monitoring task in the environment of electrified railway.