Design And Implementation Of An Online Monitoring System For Drawing Frame Based On Edge Computing

The rapid development of the industrial Internet promotes the transformation of China’s traditional manufacturing industry.The textile industry is representative of the traditional manufacturing industry.The drawing process is an important step to ensure yarn quality.It is essential to monitor the drawing frame’s running state,sliver quality,and production environment in real-time.Because cloud computing is limited by the transmission distance and the bandwidth in the network,which cannot meet real-time performance requirements of industry.Therefore,this paper designs an online monitoring system for the drawing frame based on edge computing,which combines cloud computing and edge computing to realize real-time monitoring of field equipment,production environment,and sliver quality and reduce data transmission delays.Firstly,according to the demand of drawing frame online monitoring system in textile enterprises,we designed the overall architecture of the drawing frame online monitoring system based on edge computing.The system architecture includes three modules: the edge,the cloud and the client,and analyzed the function of each module in detail.Based on the method of spectrum analysis,a method of calculating the spectrum of sliver by combining wavelet packet analysis with fast Fourier transform is designed.The edge gateway software system is developed based on Edge X.Each functional module is encapsulated by microservice and docker container technology to realize the decoupling between modules.Each microservice can be transplanted and deployed quickly.By developing the device access component of the edge gateway,the access,management of heterogeneous devices and data aggregation are realized.The data analysis component processes the sliver thickness signal on-line to get the sliver quality parameters and spectrogram and displays them in real-time at the edge.The data export component realizes the communication with the cloud and the client.The user monitoring and operation interface is developed based on the Node-RED to realize the real-time data visualization and the edge gateway micro-service control function.On the cloud server,the ARMA modeling of the sliver thickness signal is obtained to describe the internal structure of the silver,which can be used for the subsequent study of the sliver model.The Overall Equipment Effectiveness of the drawing frame is analyzed to provide a reference for improving the equipment’s production efficiency.The monitoring of the drawing frame’s status and production data based on the Web UI is realized.Finally,the function of each module of the drawing frame online monitoring system and the performance of the edge gateway are verified through experiments.The results show that the edge gateway developed based on Edge X has good stability and can ensure the realtime and data integrity in actual production.