Dual star optical fiber CAN bus network

Two star couplers constitute dual star CAN bus network. Characters are that an interface control circuit is connected to communication port of each star coupler. Interface control circuits of two star couplers through optical fiber are connected. Functions to be completed by interface control circuit are: suppression of receiving message echo, suppression of transferring answer back signal of delay inequality, and eliminating network blocking. 本发明涉及一种双星的光纤CAN总线网络，由两个星形耦合器构成双星CAN总线网络，其特点是：在每个星形耦合器的通讯端口上连接有一个接口控制电路，两个星形耦合器的接口控制电路通过光纤相连接。接口控制电路要完成的功能是抑制接收耦合器的报文回送，抑制延时差应答信号的传送，消除网络堵塞，两个星形耦合器的接口控制电路相连接，从而构成双星CAN总线网络。