Electromagnetic compatibility immunity test system used for key-free system

Abstract

The invention provides an electromagnetic compatibility immunity test system used for a key-free system. The system comprises a key signal transmitting device whose key signal transmitting antenna is arranged inside an anechoic chamber, so as to transmit a key signal to a key-free system to be tested which is arranged inside the anechoic chamber, and operation is carried out according to the key signal when the key signal received by the key-free system to be tested is a required working signal. In addition, the test system in the invention also comprises an anti-interference test system whose test signal transmitting antenna is arranged inside an anechoic chamber, so as to transmit test signals that interfere with work of the key-free system to be tested inside the anechoic chamber, and a test signal band elimination filter is arranged in the anti-interference test system and used for filtering from the test signals those within a band elimination frequency band corresponding to the frequency of a working signal, so as to eliminate influence of the test signals on the key signal, thereby enabling a test result to be relatively accurate.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an electromagnetic compatibility immunity test system for a keyless system. Background technique [0002] As more and more electronic control units are used in vehicles, the electromagnetic environment in which vehicles are located is also becoming more and more complex. Therefore, in order to avoid the failure of the electronic control unit on the vehicle caused by electromagnetic interference and threaten the life safety of users, the vehicle needs to do a specific Electro Magnetic Compatibility (EMC) for the anti-electromagnetic interference ability of each electronic control unit before leaving the factory. test. [0003] At present, the traditional electromagnetic compatibility test system is mainly for testing wired electronic control unit equipment. Such a test system cannot meet the test requirements of many vehicle wireless control units, especially keyless systems....

AI Technical Summary

Problems solved by technology

However, in addition to the interfering test signal, the antenna and probe used for testing may also generate broadband noise and harmonic noise that affect the normal operation of the keyless system at a specific frequency point, thus affecting the keyless system under test during and after the test. The performance judgment of the system affects the test results

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