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针对目前国内外标准中关于混响室连续模式条件下电子设备辐射抗扰度测试实验的缺失,为了得出一套合理的、具有良好重复性的连续模式测试方法,利用混响室对电子设备进行辐射抗扰度测试,通过对型号为FX7302的心电图机进行辐射抗扰度实验,以心电图机输出屏幕的波形变化作为是否受到干扰的依据。通过大量实验探究了连续搅拌时统计平均时间参数以及搅拌器旋转速度对测试结果的影响,将混响室不同模式测试结果进行对比分析,得出连续模式测试结果的重复性要优于步进模式的重复性;同时无论搅拌器采用何种搅拌速度,其测试结果均低于步进模式;随着搅拌速度的增快,电子设备的抗扰度阈值有下降趋势。
Aiming at the lack of experiments on radiation immunity of electronic equipment under the continuous mode of reverberation chamber at home and abroad, in order to get a reasonable and reproducible continuous mode test method, Radiation immunity test, through the model for the ECG electrocardiograph FX7302 immunity test to ECG waveform output of the screen as a basis for interference. A large number of experiments were conducted to investigate the influence of the statistical average time parameters and the rotation speed of the stirrer on the test results under continuous stirring. The results of different modes of the reverberation chamber were compared and analyzed. The results show that the repeatability of the continuous mode test results is better than that of the stepping mode Repeatability. At the same time, the test results of the stirrer are lower than that of the stepping mode regardless of the agitating speed of the agitator. With the agitating speed increasing, the threshold of the immunity of the electronic equipment declines.