电涡流编码技术的机械计数器  

Electric Eddy Current Encode for Mechanical Register

作　　者：赵达飞 

机构地区：[1]宁波水表股份有限公司,浙江宁波315041

出　　处：《中国仪器仪表》2009年第8期79-81,共3页China Instrumentation

摘　　要：阶跃响应后的LC电路会产生阻尼振荡,根据电磁感应原理电路中的电感线圈会产生交变磁场,当交变磁场中有金属物质时会形成电涡流,电涡流反作用影响LC振荡的衰减时间。在计数器的数字轮中嵌入金属圆环,在数字轮外圆周上安放电感线圈,LC电路利用电涡流阻尼产生的时间差异特性实现机械计数器的编码读数。LC circuit will be created damping oscillation after a step response. According to electromagnetic induction principle the inductance coil in the LC circuit will produce an alternating magnetic field. It will produce electric eddy current when there is metal in the alternating magnetic field. The electric eddy current will influence the fall time of LC damping oscillation. When embed a metal ring in the wheel of register and install inductance coil around wheel, LC circuit realize the encode reading of mechanical register by the characteristic of the time difference which caused by electric eddy damping oscillation.

关 键 词：电涡流 编码 机械计数器 LC振荡电路 

分 类 号：TH724[机械工程—仪器科学与技术]