Abstract: A multisource heterogeneous data acquisition system dedicated to tunnel boring machines is developed to solve the problems of numerous interfaces of tunnel boring machine, high density of highfrequency heterogeneous data, and realtime data acquisition. The system implements a system architecture of one master and multiple slaves. In this study, a unified data source access interface and an independent data source process mechanism are designed based on the design idea of "microservice" and then implemented. A development method to organize data source access in the form of plugins is then proposed. The system includes terminal software and hardware parts, visualization platform parts, etc. The system is accessed by programmable logic controller data, vibration monitoring data, muck improvement data, tool wear data, etc. and can achieve complete, independent, and realtime acquisition of multiple data sources. The system facilitates project decisionmaking and enables management personnel to obtain realtime and complete construction information on site, thus, providing support for optimizing the excavation plan.

Key words:  , tunnel boring machine, data acquisition, multisource heterogeneity, edge computing