肺通气影像仪

一、行业类别：医疗器械

二、电磁兼容标准：YY0505-2012

三、产品名称：肺通气影像仪

四、EMC电磁兼容问题要点：

射频治疗仪产品在实施电磁兼容项目时，产品在辐射发射、电快速脉冲群等两项电磁兼容测试结果不符项YY0505-2012测试要求。

辐射发射：在66 MHz频率范围不符合CLASS A限值要求。

脉冲群：产品在实施脉冲群干扰时，显示屏闪烁。

五、电磁兼容评估与分析

辐射发射：根据辐射发射测试结果的频率特性分析，66MHz包络超标频率主要是电池供电端引起的骚扰，结合产品内部各硬件单元

特性，判断干扰源主要是电源供电线引起的干扰，辐射产生的源头是该线缆流动着无用的共模电流信号，该信号等效单极天线效应，

从而导致 辐射发射超标。

六、EMC电磁兼容整改方案

1、将该产品结构重新排版，左→右调整为电源板→工控板→模拟板，滤波器、开关电源移至左下角（减少了直流端线的长度），避免

与USB、HDMI等信号线搭接；WIFI天线板移至左上角。

2、显示线、触摸屏线做滤波处理

3、电源板直流端做滤波处理

4、工控板电源线、电源板信号线做滤波处理

5、信号排线做滤波处理

七、电磁兼容整改测试结果对比

辐射发射整改前

辐射发射整改后

HTTP/1.1 200 OK Date: 11 May 2025 11:17:01 G5T Content-Length: 3073 Content-Type: text/html Connection: Close Server: Microsoft-IIS/10.0 Runtime Error

Server Error

Runtime Error

Description: A server error has occurred. The current custom error settings prevent the details of the error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please define an errorDetails attribute within the "filter.config" configuration file. This errorDetails attribute should then have its value set to "On". 


<!-- Filter.Config Configuration File -->

<configuration>
    <httpFilters errorDetail="On">
        <!-- managed filters configuration -->
    </httpFilters>
</configuration>

Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "errorPage" attribute of the <httpFilters> configuration tag to point to a custom error page location.


<!-- Filter.Config Configuration File -->

<configuration>
    <httpFilters errorDetail="LocalOnly" errorPage="mycustompage.htm">
        <!-- managed filters configuration -->
    </httpFilters>
</configuration>