Electromagnetic compatibility large current injection immunity test method

Abstract

The invention provides an electromagnetic compatibility large current injection immunity test system and method. The electromagnetic compatibility large current injection immunity test system comprises a large current injection immunity test environment system and an auxiliary monitoring system which are connected; the large current injection immunity test environment system comprises a immunity test equipment current coupling clamp and a vehicle under test which are connected; the auxiliary monitoring system comprises an audio and video monitoring system, a network communication monitoring system and an electric parameter monitoring system; the audio and video monitoring system is used for monitoring the working state of a whole vehicle; the network communication monitoring system is usedfor monitoring the whole vehicle-mounted bus network communication; the electrical parameter monitoring system is used for monitoring voltage and current parameters of electric devices under test inthe vehicle under test. The electromagnetic compatibility large current injection immunity test system can monitor, record and playback the working phenomenon of the electrical devices under test, thevehicle network communication and voltage and current conditions in the immunity process of the electrical devices under test in real time when a large current injection immunity test is carried out.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility testing, and in particular relates to an electromagnetic compatibility large current injection anti-disturbance testing system and method. Background technique [0002] In recent years, with the continuous improvement of automobile technology, more and more electronic devices are used in automobiles. The electromagnetic environment in which the car is running is becoming more and more complex. The spatially complex electromagnetic field is coupled into the circuit of the electrical device through the wiring harness connected to the electronic controller, causing current fluctuations in the circuit and affecting the normal operation of the electrical device. Based on this point, high current injection anti-interference test is required in the development process of automobile products. During the test, the vehicle network communication data, electrical device signals, electri...

AI Technical Summary

Problems solved by technology

In the immunity test, the network communication monitoring and the voltage and current monitoring are not carried out at the same time, and some abnormal phenomena may be missed, which will affect the final judgment of the immunity test level;

[0010] (2) There is hysteresis

After the immunity test is over, some problematic electrical components may be missed when checking and locating the abnormal phenomena that occurred during the test.

[0011] (3) Increase time cost and occupy laboratory resources

For faults that do not recover automatically, it is necessary to use network communication monitoring and oscilloscope voltage and current monitoring to monitor and locate faulty electrical components after the test is completed, which increases the time cost; for automatic recovery faults, the test needs to be re-implemented, which increases the time cost and waste lab resources

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