Automatic vehicle-mounted electronic control unit CAN bus communication testing device and system

Abstract

The invention relates to an automatic vehicle-mounted electronic control unit CAN bus communication testing device. A testing host of the device controls a programmable power supply to output different amplitudes of voltages according to working requirements of an ECU; physical layer testing signals of a CAN bus are output to a network oscilloscope to be displayed, and physical layer testing data are transmitted to the testing host through the network oscilloscope; ECU testing data are transmitted to the testing host through a bus data acquisition device; the testing host records, analyzes and evaluates the testing data of the ECU and the CAN bus to generate a test report. A bus interferometer is used for interfering with bus waveforms of the tested ECU in real time. The testing host controls on-off states of relays of a bus testing board card through a testing control card board to execute the bus fault injection operation. By means of the automatic vehicle-mounted electronic control unit CAN bus communication testing device, various defects of a manual test are overcome, unnecessary repeated labor of a vehicle-mounted network engineer is reduced, and the testing result is accurate.

Description

technical field [0001] The invention relates to vehicle controller testing software, in particular to a CAN bus communication automatic testing device and system for vehicle-mounted electronic control units for efficiently completing CAN network communication testing and network management testing. Background technique [0002] In today's motor vehicles, multiple electronic control units (ECUs) are usually installed, and each control unit is connected to a controller area network (Controller Area Network, CAN) to realize mutual cooperation. In the ECU development stage, the OEM will release the ECU communication requirement specification, ECU network management requirement specification and gateway routing requirement specification to the ECU supplier to constrain the ECU. After the ECU development is completed, the OEM will conduct a strict network test on the ECU to ensure that the ECU can work normally in the CAN network. At present, the network testing of OEMs is mainly...

AI Technical Summary

Problems solved by technology

Since the network test methods of different ECUs are basically the same, test engineers are mostly doing repetitive work

At the same time, it cannot be ignored that manual testing will inevitably introduce human errors, which will affect the accuracy of test results.

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