Vehicle Network Offset Redundancy Test System, Method and Device

Abstract

The invention discloses a test system, a method and a device for redundancy of an in-vehicle network during ground offset, and solves the problem that whether a controller area network (CAN) bus can communicate and diagnose normally cannot be tested when ground offset happens to power supply of an electronic control unit (ECU) system in the prior art. The test system comprises a CAN bus, a target test platform, a direct current stabilized power supply, a programmable power supply, a bus monitoring device and an upper computer, wherein the target test platform is electrically connected with the CAN bus, used for receiving and selecting a control command of to-be-tested targets required to generate the ground offset, and executes actions corresponding to the control command; the direct current stabilized power supply is connected with each to-be-tested target in the target test platform and used for supplying stable working voltage for the to-be-tested targets; the programmable power supply is connected with each to-be-tested target in the target test platform and used for providing supply voltage generating ground offset voltage for to-be-tested targets required to generate the ground offset; and the upper computer operates a bus test tool. After adoption of the technical scheme, the redundancy and reliability of a whole electronic control system can be guaranteed effectively.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a system, method and device for testing offset redundancy of a vehicle network. Background technique [0002] With the continuous development of automobile technology, more and more electronic ECU (electronic control unit) and communication systems are used in modern automobiles, such as engine electronic control system, automatic transmission control system, automatic cruise system and vehicle multimedia system. The emergence of the vehicle network connects all ECUs together and shares signal resources, which greatly reduces the use of wiring harnesses, reduces the weight and cost of the vehicle, and improves the real-time performance and safety of the vehicle. However, the increase in the number of electronic control units and the complexity of the internal layout of the vehicle will inevitably increase the offset of the power supply of the ECU. In the case of ECU groun...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a vehicle-mounted network offset redundancy testing system, method and device, which are used to solve the problem in the prior art that it is impossible to test whether the CAN bus can communicate and diagnose normally when the power supply of the ECU is offset.

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