CAN/LIN network interference automation test system

Abstract

The invention relates to a CAN / LIN network interference automation test system. The system comprises an upper computer (network interference automation test software), an arbitrary waveform signal generator, a signal interference coupler, a bus monitoring device, a relay matrix, an I / O simulation board card, a load simulation board card, a collecting board card and a power supply device. The system is divided into a management module, a consistency test module and a network interference module. The system is characterized in that the system carries out an automatic and quick interference fault injection test, automatically reads diagnostic information, a bus signal and other information through a consistency test after fault injection, carries out state comparison analysis before and after the test, and rapidly confirms the state of a vehicle control unit. The system monitors the bus state of a controller to confirm the anti-interference ability of the controller. The test tracks and solves the problem of network interference as a sample is upgraded to a genuine sample from initial design and development, so as to protect the network communication stability of the controller in a vehicle.

Description

technical field [0001] The invention relates to a CAN / LIN network interference automatic test system, which belongs to the technical field of circuit interference fault injection of automobile control units, and in particular relates to the technical field of interference fault injection to the bus network of automobile control units. Background technique [0002] With the development of electronic technology, the number of vehicle control units is increasing. They control various loads and coordinate work through the vehicle network CAN / LIN communication to solve vehicle function and performance requirements. [0003] Due to the operation of high-power loads, batteries and external electronic equipment on the vehicle, electrical interference will be generated on the vehicle control unit. These disturbances may affect network communication, resulting in a large number of error frame information, communication interruption, unstable transmission and crashes, etc., seriously af...

AI Technical Summary

Problems solved by technology

[0003] Due to the operation of high-power loads, batteries and external electronic equipment on the vehicle, electrical interference will be generated on the vehicle control unit. These disturbances may affect network communication, resulting in a large number of error frame information, communication interruption, unstable transmission and crashes, etc., seriously affecting the quality of the vehicle. normal work

It is necessary to carry out anti-disturbance tests on automotive control units during the product development stage. Traditional non-automated test methods have problems of low coverage, low efficiency, and poor test consistency.

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