Vehicle-mounted electronic control unit LIN bus communication automatic testing device and system

Abstract

The invention relates to a vehicle-mounted electronic control unit LIN bus communication automatic testing device. A test host of the device controls a programmable power supply to output voltages of different amplitudes according to the work needs of an ECU. The physical layer testing signal of a LIN bus is output to a network oscilloscope to be displayed, and physical layer testing data are transmitted to the test host through the network oscilloscope. ECU testing data are transmitted to the test host through bus data collecting equipment. The test host records, analyzes and evaluates the testing data of the ECU and the LIN bus to generate a test report. The test host controls all relays of a bus test board card to be connected or disconnected through a bus control board card to execute bus fault injection operation. According to the vehicle-mounted electronic control unit LIN bus communication automatic testing device, various defects of manual testing are overcome, unnecessary repeated labor of a vehicle-mounted network engineer is reduced, and the test result is precise.

Description

technical field [0001] The invention relates to vehicle controller test software, in particular to a vehicle-mounted electronic control unit LIN bus communication automatic test device and system for efficiently completing LIN network communication tests and network management tests. Background technique [0002] In today's motor vehicles, a plurality of electronic control units (ECUs) are usually installed, and each control unit realizes the cooperative work with each other by accessing a LIN network (Controller Area Network, LIN). 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 strict network tests on the ECU to ensure that the ECU can work normally in the LIN network. At present, the network testing of OEMs is mainly based on...

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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