基于数字孪生的加工生产线虚实交互技术研究

Digital twin-based virtual-real interaction technology for processing lines

针对传统加工生产线运行过程中设备数据采集困难和可视化程度低的问题,研究了数字孪生(DT)技术在加工生产线虚实交互方面的应用问题。首先,以某电机外壳加工生产线为例,分析了生产线的加工流程,设计了虚实交互技术的总体框架,并提出了具体的方法;然后,对加工生产线进行了数字孪生体建模,对模型中的关键要素,几何、物理、行为属性及通讯接口的构建进行了详细的阐述;最后,采用过程控制的对象链接和嵌入(OPC)技术进行了加工生产线中多源异构数据的采集与处理,完成了实时数据间的映射。研究结果表明:采用虚实交互技术可以完成物理生产线与数字孪生体间的实时映射;电机外壳加工生产线中机械臂虚实交互的可靠性为99.95%,可满足精确性要求;采用服务模块能够更加直观、有效地反映生产线的实际加工状态,可满足加工过程信息动态可视化要求,证明了该方案具有可行性和有效性。

Aiming at the problems of difficult equipment data acquisition and low visualization in the operation process of traditional processing production line,the application of digital twin(DT)technology in the virtual-real interaction of processing production line was proposed.Firstly,a motor casing processing production line was taken as an example,and the processing flow of the production line was analyzed,the overall framework of the virtual-real interaction technology was designed,and specific methods were proposed.Then,the digital twin modeling of the processing production line was carried out,and the key elements in the model,the geometric,physical,behavioral attributes and the construction of communication interfaces were elaborated in detail.Finally,the object linking and embedding for process control(OPC)technology was used to collect and process heterogeneous data from multiple sources in the processing production line,and the mapping between real-time data was accomplished.The research results show that the real-time mapping between the physical production line and the digital twin can be accomplished by using the real-virtual interaction technology;the reliability of the real-virtual interaction of the robotic arm is as good as the reliability of the physical production line and the digital twin.The reliability of the real-virtual interaction of the robotic arm is 99.95%,which meets the accuracy requirements;the service module can reflect the actual processing status of the production line more intuitively and effectively to meet the dynamic visualization of the processing process information,which proves the feasibility and validity of the scheme.