21000-16-05-00-030-04-02本特利探头

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探头即传感器的再封装形式，是把传感器的基本单元，通过合理的电子电路与外部封装结构，对传感器进行封装，使它具有我们所需的一些功能的部件，他和传感器一样，通常根据其基本感知功能分为热敏探头、光敏探头、气敏探头、力敏探头、磁敏探头、湿敏探头、声敏探头、放射线探头、色敏探头和味敏探头、探头等几大类。
有谐振式传感器、宽带传感器、水型传感器、高温传感器、低温传感器等其他功能型的传感器。探头在电涡流传感器系统中发挥重要的作用。未能做好探头的安装，以至于探头距离金属体过近或导电体面积过小，将导致涡流的形成受到影响。因此在实际检修作业时，还应加强机组保护仪表探头的安装与维护，以机组的运行能够得到监控。
探头的前置器一般提供探头需要的电源，对信号进行放大、检波和滤波等。
电涡流位移传感器的探头线圈接受前置器振荡电路来的高频电流，在其周围产生高频磁场，该磁场穿过靠近它的转轴金属表面，在其中产生一个电涡流，该电涡流产生的磁场方向和线圈磁场方向相反，改变了原线圈的感抗，该感抗的变化随探头顶部金属表面的间隙变化而变化。
前置器检测电路检测探头线圈的感抗变化。再经放大电路将感抗变化量变换放大成相应电压变化信号输出。经监测仪进行转换，根据测量的要求将其输出电压的直流部分用做位移量的检测，交流部分用做振动值的检测。

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