CAN bus test system and CAN bus test method based on UDS

Abstract

The invention relates to the technical field of testing, and provides a CAN bus test system and a CAN bus test method based on a UDS. An ECU to be tested is connected to PCAN hardware through a CAN bus, the ECU to be tested is connected to an external testing device through the PCAN hardware in a USB mode, the ECU to be tested is started, and the working performance of the ECU to be tested is tested through the external testing device. In this way, the use of high-cost German Vector software in cooperation with a canoe hardware test system can be avoided, the test cost is effectively reduced,the test effect is accurate, the success rate is high, the test system is simple to erect, the operation is convenient and easy to understand, meanwhile, the same test function as that of the German Vector software matched canoe hardware test system can be realized, and the working performance of a product is ensured.

Description

technical field [0001] The present application relates to the technical field of testing, in particular to a UDS-based CAN bus test system and a CAN bus test method using the UDS-based CAN bus test system. Background technique [0002] Based on the factors of environment, energy and technological development, new energy vehicles are the current and future trend of automobile development, among which pure electric vehicles are the mainstream products. In order to adapt to the needs of the times and customers, there are more and more controllers (ECU, Electronic Control Unit, electronic control unit) on new energy vehicles. In the process of producing or using vehicles, it is usually necessary to control multiple controllers in the vehicle carry out testing. [0003] In electric vehicles, ECU is an important core part, and its safe operation is the guarantee for the normal driving of electric vehicles. At present, the method of testing ECU adopts the method of prototype vehi...

AI Technical Summary

Problems solved by technology

Testing the ECU by means of prototype testing requires the assistance of the testers, which wastes the time and energy of the testers, and is not safe

If there is a problem during the on-site sample vehicle debugging, the control strategy program set in the ECU cannot be changed or / and refreshed in time

[0004] In addition, the process of the CAN bus controller test method based on UDS (Unified diagnostic Services) is as follows: the development of ECU diagnostic module needs to realize the secure access service and the security authentication algorithm involved. In order to verify the correctness of the development, The current traditional test method is to use German Vector software to test with canoe hardware (vector hardware). Among them, Vector is the world's leading supplier of bus development tools, network node test verification tools and embedded software components. Provide a series of powerful software and hardware tools and source codes in the fields of design, modeling, simulation, analysis, testing, and ECU development, testing, calibration, and diagnosis, while Vector software and Canoe hardware are relatively expensive, generally costing tens of thousands of yuan , when a large number of projects require multiple tools, the cost will increase, and if the number of tools is not enough, it will affect the work efficiency

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