基于无线传感器网络的CAN总线互联

Using Wireless Sensor Network to Connect CAN

给出了CAN总线无线接入控制模块的电路设计,模块各主要组成部分的作用是:CAN控制器SJA1000,运行CAN协议,为无线传感器网络节点提供CAN总线服务;收发器TJA1050,作为CAN控制器与物理媒体的物理接口,为CAN控制器提供比特流服务;无线传感器节点采用基于TinyOS的GAINS节点,负责数据的缓存和无线传输。给出了基于TinyOS底层通信接口的无线传感器节点的通信协议设计包括流量控制和缓存设计等。目前,该系统已经实现,使用效果良好,对于一般的信息采集无线传输系统设计具有较好的借鉴意义。

A WSN （wireless sensor networks） was designed to connect the CAN（control area net） of upper part and lower part. The designed system circuit included three main modules： SJA1000 to run CAN protocol, TJA1050 to provide bit-stream service for SJA1000, GAINS to provide cache and wireless connection. Based on the communication API of TinyOS, the communication protocol was designed, which included the cache design and traffic control. The designed system is implemented and the experiment results are good.