便携式监护仪的电磁辐射抗扰度试验研究

报告以某款目前军队医院所使用的便携式监护仪为对象,分别进行了混响室射频辐射试验和超宽带（UWB）电磁脉冲辐射试验,测试其抗干扰能力。试验表明：UWB电磁脉冲对监护仪干扰严重,需重点进行防护;所选用的监护仪对射频连续波辐射具有一定的抗干扰能力,异常状态多表现为测量波形基线漂移、畸变;监护仪对于不同频率的电磁干扰具有不同的电磁敏感性,所选用的监护仪对390MHz左右的电磁干扰最为敏感。

Experimental Research on the Electromagnetic Radiation Immunity of a Kind of Portable Monitor

The paper is focused on a kind of portable monitor that is widely used in military hospitals.In order to study the electromagnetic radiation immunity of the monitor,the experiments of electromagnetic radiation caused by radio frequency continuous wave in reverberation chamber and by ultra wide band（UWB） electromagnetic pulse have been done.The study results show that UWB electromagnetic pulse interferes observably the operating state of the monitor.It should be paid high attention to take protective measures.The monitor tested has some electromagnetic immunity ability for radio frequency continuous wave radiation.The frequent abnormal phenomena are baseline drift and waveform distortion.The electromagnetic sensitivity of the monitor is related to the frequency of interference source.The monitor tested is most sensitive to the frequency of 390MHz.