关键词: 数字孪生, 检修车间, 实时信息, 铁路货车

Abstract: To realize the real-time and transparent management and control of railway freight car maintenance workshop,and to improve the informatization and intelligence level of workshop management,a six-dimensional model of digital twin maintenance workshop was proposed based on digital twin technology,the core functions and development process of the system were introduced,and the whole element accurate modeling process such as data acquisition and exchange,three-dimensional visual scene construction and inspected object generation were described in detail.Based on the data acquisition and exchange method of distributed MQTT architecture,the state matrix of multi-source heterogeneous data flow nodes was established,and the data was exchanged with the workshop management and control system by using embedded equipment,acquisition card,sensor and logic controller.Combined with the dynamic model of the whole maintenance process of equipment,materials and production line in the maintenance workshop,the digital twin system of maintenance workshop with virtual real interactive mapping was constructed.Through the technical output of coupler knuckle maintenance tracking and maintenance process Gantt chart based on data mining,the application scenario of digital twin key technology in coupler knuckle intelligent maintenance was displayed,which verified the effectiveness of the proposed method,and provided a reference for the application of digital twin in intelligent rail transit.

Key words: digital twin, maintenance workshop, real-time information, railway wagon