Design And Implementation Of A Wind Blade Structural Health Monitoring System

In recent years,with the rapid development of global green energy,wind power is one of the most representative green energy sources.In order to improve the efficiency of wind power generation and increase the safety of equipment,more and more wind turbines are constructed with composite materials.Compared with traditional materials,composite materials have higher hardness,better toughness and better quality.Light weight and so on.However,composite materials are composed of many kinds of materials,so the composite materials may cause fatigue damage after long-term use,and then produce potential safety hazards,resulting in economic losses.Therefore,structural health monitoring of equipment using composite materials can discover problems that can not be found manually in time and reduce economic losses.The FBG sensor is installed at the key point of wind turbine.The system collects sensor data in real time,and then processes and analyses the data.Establish health rules and judge whether the data is abnormal according to the corresponding health rules.When the data is abnormal,the system automatically records,alarms and processes the data.Through the analysis of the collected data,the system can also know the operation efficiency of wind turbines and other information,and then provide specific data basis for future design and location of wind turbines,instead of judging through experience.The system transfers data to the cloud data storage center through the network.Users can access the cloud data storage center to view data.Compared with the traditional monitoring and maintenance methods,it greatly reduces the time and labor costs.The structural health monitoring system for wind turbine blades consists of fiber grating sensor,demodulator and structural health monitoring system.It consists of three parts: upper computer,lower computer and cloud data storage center.The lower computer system is responsible for collecting data,processing and analyzing the data and sending the collected data to the cloud data storage center.The demodulator connects the sensors to collect data.The demodulator sends the data to the lower computer system through the network.The lower computer system adopts C/S structure and UDP/IP transmission protocol to communicate with the demodulator.The TCP/IP transport protocol is used to communicate with cloud data storage center.Cloud data storage center is mainly responsible for the storage and management of data sent by the lower computer.When the data of cloud data storage center reaches a certain number,it automatically backs up,compresses and deletes the data.The upper computer system adopts B/S structure,which is mainly responsible for accessing cloud data storage center to obtain real-time data and historical data.Users can view the data of each wind turbine through the upper computer system,and realize the remote monitoring function of data.