Research And Implementation Of WSN-based Structural Health Monitoring System For Super High-rise Buildings

In recent years,with the rapid advancement of urbanization in China,a large number of super high-rise buildings have been erected,and the structural safety problems brought by them have gradually attracted attention.By conducting real-time monitoring of the structure of super high-rise buildings,it is possible to constantly grasp the structural health status of super high-rise buildings.However,the existing means of monitoring the structural health of super high-rise buildings are time-consuming and costly.Therefore,how to realize an economical,reliable,all-weather,omnibearing and real-time structural health monitoring means for super high-rise buildings is an urgent problem to be solved.This paper combines embedded technology and wireless sensor network technology to implement a WSN-based structural health monitoring system for super high-rise buildings,and does the following:(1)To address the problem of unbalanced energy consumption and underutilization of energy by nodes in WSNs leading to a short WSN life cycle,a low-power routing algorithm for WSNs based on K-means clustering was proposed.The algorithm selects the initial cluster center according to the maximum distance product rule;In the iterative process of K-means algorithm,energy consumption factors are introduced and ordinary nodes closer to the base station are added to clusters led by the base station to optimize the clustering effect and cluster head selection of K-means,and reduce the energy consumption of nodes near the base station and data transmission within the cluster;Use the Dijkstra algorithm to search for the lowest power transmission path between the cluster head and the base station,allowing the cluster head to transmit data to the base station through a low-power multi-hop path to reduce the energy consumption of the cluster head.The simulation results show that this algorithm can effectively extend the life-cycle of the network and delay the occurrence of the first dead node.(2)Aiming at the problem that the current structural health monitoring methods for super high-rise buildings can not meet the requirements of economic,reliable,all-weather,omnibearing and real-time monitoring,this paper designs a WSN based structural health monitoring system for super high-rise buildings.The monitoring system collects the settlement,vibration acceleration,wind load,inclination angle,and stress-strain of buildings through four types of sensor nodes,and transmits the collected data to the gateway through Lo Ra wireless communication technology.Finally,the gateway forwards the data to IPC and cloud server.(3)To test the functionality of the monitoring system,it was tested in both laboratory and actual working environments,and the experimental results showed that the monitoring system was functioning normally.Finally,a comprehensive evaluation method based on cloud model and DS evidence theory was used to evaluate the structural health status of super high-rise buildings,and the results indicate that the monitoring system can effectively evaluate the structural health status of buildings.