Automatic test system for CAN network and ECU functions

Abstract

The invention discloses an automatic test system for CAN network and ECU functions. The automatic test system comprises a mainframe, a bus analyzer, a bus interferometer, an oscilloscope, a programmable power supply and a function test board. The mainframe manages the test system in an unified mode, controls the test processes of the whole system concentratedly and achieves automatic tests in which the test processes are performed automatically and test reports are output automatically; the bus analyzer receives, transmits and analyzes bus information; the bus interferometer achieves interference operation on a bus; voltage is converted through the programmable power supply; a multi-path digital oscilloscope is adopted as the oscilloscope, the signal collecting end is connected with the bus or the ECU output end, and the oscilloscope collects waveforms through communication with the mainframe and displays the waveforms in the mainframe to capture information; the function test board simulates input signals needed in the test processes and collects the output signals of the tests. The system has the advantages of improving test efficiency and reducing test errors.

Description

technical field [0001] The invention relates to the field of automobile communication test and automobile electrical function test, in particular to a CAN network and ECU function automatic test system. Background technique [0002] At present, CAN technology is widely used in the field of industrial communication, especially the communication of the electronic device network inside the car, because of its high real-time performance, stability, economy, fault tolerance and other characteristics. How to ensure the correct application of CAN technology and improve the utilization efficiency of CAN technology has become the focus of attention in the field of automotive electronics, especially the application of CAN network technology in development and testing by vehicle manufacturers. For the automotive CAN network test, the test content covers: physical layer test, data link layer test, interaction layer test, application layer test, and the application forms are: communicati...

AI Technical Summary

Problems solved by technology

For OEMs, there are problems such as extensive test content, many test equipment, and cumbersome test steps.

[0003] Existing CAN network test technology generally uses Vector’s CANoe, CANcase / VN1640, CANtress, CANscope, CANdela, VH1100, VT System and other hardware and software testing tools, and functional testing generally uses HIL (Hardware-in-the-Loop) Testing technology, the introduction of products from companies such as NI, these systems are expensive, and most of them currently lack centralized management of these tools, and the test content involves the use of various test tools. At the same time, with the increase of test items, the test As the frequency increases, manual control of a series of tests becomes time-consuming and laborious, and manual control may also cause unnecessary errors

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