Digital Twin Structure Monitoring System And Key Technology Of Mine Excavator

Mine excavator is the key equipment for open-pit mining.Due to its high work intensity and long work cycle,structural failures will cause serious economic losses.Therefore,real-time monitoring of its structural performance is required.However,the traditional structural performance calculation method has a large amount of calculation and a long time,and it is difficult to meet the requirements of real-time monitoring of structural performance.Digital twins are a good solution.Digital twin is the concept of establishing real-time interactive mapping between physical space and virtual space.It reflects the valuable information hidden in the physical space of the product.The concept of digital twin is introduced into the structural performance solution of the electric shovel,a digital twin method for monitoring the structural performance of the electric shovel is proposed,and solutions are proposed for key technologies,and the corresponding system is developed.This method combines the finite element method,artificial intelligence algorithm and computer three-dimensional display technology to construct a digital twin model of the mining shovel,and realizes real-time monitoring and early warning of the structural safety of the mining shovel.Taking the experimental electric shovel for mining as an example,the feasibility of this method is verified.The specific research content is as follows:(1)In response to the demand for real-time monitoring of the excavator structure,the various components of the digital twin structure monitoring system of the excavator are planned,including three parts: physical model,sensor and communication system,and digital space.It also analyzed the composition of each part and its interconnection,and designed the architecture for each level of the digital twin system.(2)According to the physical entity model,the various components of the mining electric shovel and their mutual movement relations are analyzed.In order to realize the real-time mapping from the digital twin system to the real movement of the excavator.In view of its structural performance,finite element method and deep neural network algorithm are introduced to solve this problem.Realize the high efficiency and real-time performance of the digital twin system.(3)For the components of the sensor and communication system,extract the motion characteristics from the mining shovel entity and arrange the corresponding sensors.The collection and transmission of the signal collected by the sensor is realized through serial communication.Use Web Socket communication protocol to realize data communication between industrial computer and digital twin system.Ensure that the motion characteristic data in real mining operations can be transmitted to the digital space in complete real-time.(4)In order to realize the real-time change display of the structural performance of the mining electric shovel,a three-dimensional visualization space was established.Based on the principle of Web GL,with the help of the Three.js script,a scene is created in the browser.Realtime calculation and analysis of structural performance information are displayed in the form of three-dimensional cloud diagrams.At the same time,various interactive actions are designed for the three-dimensional display scene,and a UI interface with a good user experience.