CAN node interconnection device based on optical fibers

Abstract

The invention discloses a CAN node interconnection device based on optical fibers, which comprises a node (1), a node (2) and an optical fiber network, wherein the node (1) and the node (2) are connected through the optical fiber network. A CANTX1 of the node (1) is connected with a first electro-optical conversion module, passes through the optical fiber network and a second electro-optical conversion module, and then serves as an input of a second AND-gate logic circuit together with a CANTX2 from the node (2); and an output of the second AND-gate logic circuit is connected with a CANRX2 ofthe node (2). The CANTX2 of the node (2) is connected with the second electro-optical conversion module, passes through the optical fiber network and the first electro-optical conversion module, and then serves as an input of a first AND-gate logic circuit together with the CANTX1 from the node (1); and an output of the first-AND gate logic circuit is connected with a CANRX1 of the node (1). Withthe technical schemes of the invention, different node designs adopt the same interface circuit, without need of designing the dedicated optical fiber interface board, so as to simplify the circuit design and improve the universality of a circuit board.

Description

technical field [0001] The invention relates to a network interconnection device, in particular to an optical fiber-based CAN two-node or more than two-node multi-node interconnection device, which can be widely used in the fields of automotive electronics, building automation, industrial networks and the like. Background technique [0002] CAN (Controller Area Network, Controller Area Network) bus network is a multi-host local network launched by BOSCH for modern automotive applications. Due to its high performance, high reliability, real-time and other advantages, it has been widely used in industrial automation , a variety of control equipment, transportation, medical equipment, construction, environmental control and many other departments. As a mature network interface, CAN network has been widely used in automotive electronics, building automation, industrial networks and other fields. The CAN bus can use twisted pair, coaxial cable or optical fiber as the transmissio...

AI Technical Summary

Problems solved by technology

Based on the above analysis, the existing technology has the following problems: multi-node interconnection needs to design a dedicated optical fiber interface board, and it is relatively complicated

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