Test method for wideband radiated immunity test device of on-board display

Abstract

The invention discloses a test device and a test method for broadband radiated immunity of a vehicle display device as well as application. The test device is provided with a radio frequency interference signal source, a first coaxial radio frequency switch, a low-frequency section power amplifier, a high-frequency section power amplifier, a forward power meter, a backward power meter, a second coaxial radio frequency switch, a third coaxial radio frequency switch, a first oriented coupler, a second oriented coupler, a fourth coaxial radio frequency switch, a 20MHz-200MHz low-frequency bi-conical antenna, a log antenna, a horn antenna, a field strength meter, a camera, a high-speed image acquisition card, a radio frequency switch control module, a serial port expansion card, a control host machine, a GPIB (general purpose interface bus) interface card and the vehicle display device. During testing, a broadband radio frequency interference signal is generated by a radio frequency interference signal source, the control host machine is used for judging the frequency section of the frequency of the interference signal, on the basis of the frequency section, the control host machine is used for controlling the radio frequency switch control module to automatically switch the coaxial radio frequency switches, so that the radio frequency signal source is enabled to be connected with the corresponding power amplifier and the corresponding antenna, and the forward power meter, the backward power meter and a video monitoring device are respectively used for the online monitoring of the testing field strength and the working state of tested equipment.

Description

technical field [0001] The invention relates to a test method of a wide-band radiation immunity test device for a vehicle display. Background technique [0002] Radio frequency electromagnetic field radiation immunity is used to investigate the degree to which the performance of the tested sample is affected when it receives external space radiation disturbance. It is one of the most important test methods in the immunity test of electronic information products. As a vehicle-mounted electronic product, the vehicle-mounted display has stricter requirements on immunity to interference, and the test frequency range required for the test is getting wider and wider. However, the current single test instrument is often unable to meet the requirements of high-frequency sample testing due to frequency band limitations. If every To test a certain frequency range, the test instrument needs to be replaced, and the efficiency of the whole test process is very low. In addition, the dete...

AI Technical Summary

Problems solved by technology

As a vehicle-mounted electronic product, the vehicle-mounted display has stricter requirements on immunity to interference, and the test frequency range required for the test is getting wider and wider. However, the current single test instrument is often unable to meet the requirements of high-frequency sample testing due to frequency band limitations. If every To test a certain frequency range, it is necessary to replace the test instrument, and the work efficiency of the whole test process is very low.

In addition, at present, the judgment of the working status of the tested samples during the radiation resistance test of the vehicle-mounted display is based on the observation of the inspectors, but the impact of high-field electromagnetic radiation interference sources on the health of the experimenters is obvious.

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