Method and apparatus for testing CAN bus antielectromagnetic interference ability

Abstract

This is a test method of anti-electromagnetism interfere capability of CAN bus. The CAN bus interface of the CAN bus electron controlling equipment connects with CAN bus interface of CAN bus terminal by metal line to exchange the communication between the CAN electron controlling equipment and CAN bus terminal through CAN bus. The electromagnetism disturb signal is added to the metal line of CAN bus by electromagnetism disturb coupling equipment. Estimate whether communicate trouble has come into being in the prescriptive time by the communicate trouble inspect function of the CAN bus, and estimate the anti-electromagnetism interfere capability of the CAN bus electron controlling equipment. The equipment has the CAN bus terminal with the communicate trouble inspect function. CAN bus terminal has the same CAN bus physics layer same as the one of the CAN bus electron controlling equipment which is the same type of CAN bus transceiver designed according to the same CAN bus transceiver circuit principle and same printing circuit plant designing rule.

Description

Technical field [0001] The invention relates to a method and a device for testing the anti-electromagnetic interference ability of a CAN bus. Background technique [0002] CAN bus is a serial communication method for implementing information exchange between electronic devices. The method is to use metal wires to connect the input and output signal terminals of the CAN communication interface circuit in each electronic device to form a data communication network based on the bus. Information exchange between electronic devices. [0003] Since the CAN bus uses metal wires as the communication medium for data transmission, it also receives various electromagnetic interferences during the data transmission process, and transmits the electromagnetic interferences it receives to each electronic device connected to it, interfering with the electronic devices. normal work. It is one of the important factors to ensure the reliable operation of the electronic device in a certain el...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defect of changing the electromagnetic characteristics of the CAN bus test system and the anti-electromagnetic interference ability of the CAN bus test tool itself in the prior art, causing the test results to deviate from the actual situation, the present invention provides a method and device for testing the anti-electromagnetic interference ability of the CAN bus , using the CAN bus terminal designed according to the characteristics of the CAN bus to detect CAN bus communication faults, so that the test results are closer to the actual anti-electromagnetic interference ability of the CAN bus of the electronic device under test

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