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  <div id="mup"> <b>您的位置：</b> <a href="/">首页</a> > <a href="/article.html">技术文章</a> > <span>铁路信号灯的控制原理分析</span></div>
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      <h1>铁路信号灯的控制原理分析</h1>
      <div class="nwdtl_tip"><span>更新时间：2018-11-24</span><span>浏览：3211次</span></div>
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        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a target="_blank" href="http://www.dingxuanzm.com/SonList-1520535.html"><strong>铁路信号灯</strong></a>采用抛物线反光系统具有聚光、显示距离远的特点。 选用球型色片与齿槽式扳动机构结合的变色系统扳动灵活定位准确具有防止&ldquo;假显示&rdquo;的功能。上下体隔绝可减少反光镜与操作机构被酸气腐蚀。并装有副灯泡以备急用。<br />　　铁路线路上分成很多的闭塞分区，每个闭塞分区设有一架通过信号机。而色灯信号机的灯光颜色转换是由轨道上的脉冲电流来控制的，两个相邻的闭塞分区之间须由轨道绝缘节来隔开。在没有列车通过时，两条轨道的电流是不相通的，信号机的灯光显示为绿色，也就是说允许列车按规定速度运行通过。如果列车机车的导轮压过了前方闭塞分区的绝缘节，这样就在闭塞分区的轨道上通过导轮产生了一个电流短路，而信号机的灯光就变为红色，即不允许后续的列车进入本闭塞分区，通过这种办法来控制一个闭塞分区只能有一个列车占用，这样就有效的防止了列车之间的追尾事故。因为铁轨上是脉冲电流，电压很低，所以对人是没有威胁的。</p>
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