心电图机的一般特性简介

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                    <section><section powered-by="gulangu"><section><p><img src="image/20201019/7b80d51707f11d32f2d180a12e81983b_1.gif" /></p></section></section><section powered-by="gulangu"><section><section><p>心电图机的频率响应</p></section> <p><img src="image/20201019/e2cdbc8b23b93fbecc71fa6c9364798d_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; 心电图机的频率响是指在其最高最低频率范围内的心电流线性地放大和记录，而对于心电流之外的各种干扰应完全予以预制。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 心电图机的高频端的频率响应主要受到记录器的限制，而电流计是记录器的主要部件，它本身的谐振频率限制着记录器所能记录的最高频率。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;通常对心电图频率响应的要求为：1~10C/S的灵敏度为100%；15C/S时应不低于90%；40C/S时应不低于50%。</p></section></section></section><section powered-by="gulangu"><section><section><p>心电图机的灵敏度</p></section> <p><img src="image/20201019/e2cdbc8b23b93fbecc71fa6c9364798d_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;心电图机的灵敏度是指在它的频率响应范围内对输入电流的放大率，即输出端对输入端电流的比值。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;由于心电图机的输出形式表现为描记得波形，所以波形的幅值就直接反映输出电流的大小，以毫米表示振幅的高度，并且将输入的心电流也变换成电压形式，以豪伏数表示，所以心电图机的灵敏度是以mm/mV来表示。一般心电图机的最大灵敏度可达20mm/mV。</p></section></section></section><section powered-by="gulangu"><section><section><p>心电图机的失真度</p></section> <p><img src="image/20201019/e2cdbc8b23b93fbecc71fa6c9364798d_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;心电图机的失真度是指其对输入的心电信号进行不失真的放大，否则将要出现波形畸变或整机灵敏度下降，一般把这种失真成为非线性失真。</p><p>&nbsp;（注：造成波形畸变的原因是切线误差。）</p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><section><p>欢</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>迎</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>注</p></section></section></section> </section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><p><img src="image/20201019/191b06dcea97430c058297c019798249_5.jpg" /></p></section></section> </section><section> <section powered-by="gulangu"><section><section> </section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关注我们</p><p>一起涨姿势！</p></section></section></section> </section></section></section></section>