Novel electrical continuous and fully shielded CAN (controller area network) bus connection method

Abstract

The invention relates to a novel electrical continuous and fully shielded CAN (controller area network) bus connection method, belonging to a communication technology, in particular to an improvement of a bus connection method. The method is characterized in that a coaxial double-wire electrical connector (1) is adopted, CAN-H core wires of two CAN bus cables are connected with an internal contact coupler (core conductor) (5) in a plug of the coaxial double-wire electrical connector (1) and are also connected with an external contact coupler (outer conductor) (6) of the plug of the coaxial double-wire electrical connector (1), two CAN buses are inserted into a shielding tail clamp (2) of the plug of the coaxial double-wire electrical connector (1), a shielding sleeve is connected with the shielding tail clamp (2) of the plug through welding, the shielding tail clamp (2) is connected with a connector plug shell (3) through welding, and the plug shell (3) is connected with a shell of a device through a plug nut (4). The resistance of the CAN buses against electromagnetic interference can be improved greatly, and the reliability and security of a CAN bus network can be enhanced; and the constructed dual-redundant CAN bus network has a physical error prevention function.

Description

technical field [0001] The invention belongs to communication technology, and in particular relates to an improvement of a bus connection method. Background technique [0002] At present, the connection method of the CAN bus at home and abroad is basically the bus method, and a few adopt the method of full-path electrical continuity. However, the connection method only solves the problem of electrical continuity to the input end of the device, and other problems still exist, such as figure 1 shown. [0003] exist figure 1 In the circuit shown, the CAN bus cable is a double-pair shielded wire. In the bus-type CAN network, the main line of the bus is divided into two by a bifurcation method, and one branch is separated to connect with the device, and the other continues to be the main line. The bifurcation point destroys the physical continuity of the double-pair shielded wire. In addition to affecting the electrical characteristics of the core wire and the shielding effect ...

AI Technical Summary

Problems solved by technology

However, a short shielded wire is added to the electrical connector of the device, which doubles the electromagnetic gap of the CAN bus. At the same time, the existence of process breakpoints cannot be eliminated.

Images