基于CAN总线的桥梁健康监测系统异构网络协议研究

Heterogeneous Network Protocol Research Based on CAN Bus for Bridge Health Monitoring System

桥梁健康监测由于桥梁结构的多样性和复杂性,需要搭建具备有线与无线灵活转换的异构网络,才能满足实际工程需要以及降低工程成本。设计并实现了有线与无线灵活转换的异构网络,在完成CAN总线移植到Tiny OS的基础上,对原应用于无线传感网的汇聚树协议(collection tree protocol,CTP)进行了功能的扩展,使其可以应用于混合网络,实现了有线传输与无线传输可以随意转换的异构网络,在保留了无线原有的优点的同时,提高了传输的可靠性,显著降低了工程的成本。

Because of the diversity and complexity of bridge structure in Structure Health Monitoring（ SHM） systems for bridges,hybrid networking with flexible converting between wired and wireless transmission protocols is essential to satisfy project requirements and lower engineering cost. A novel hybrid network construction framework was proposed. On the basis of porting CAN bus to Tiny OS,Collection Tree Protocol（ CTP） was extended to support both wireless and CAN bus transmission protocols and can freely convert between them,so that CTP can be applied to hybrid networking,improving transmission reliability and significantly reducing project cost with the advantage of the original wireless network＇s flexibility.