In electric railway track circuit, the two steel tracks are both transmission line of the track signal and return line for electric locomotive tractive current back to electric substation.
在电气化铁路轨道电路中，两条钢轨即是轨道信号的传输线，又是电力机车牵引电流返回变电所的回流线。
Current sensor is an important element for on line PD monitor of electric power equipment and its transfer characteristic has a direct influence on PD measurement.
电流传感器是电力设备局部放电在线监测系统中的一个重要组成部分，其局部放电信号传输特性直接影响测量结果。
The principle of paper thickness on-line measurement using displacement differential method based on laser displacement sensor and electric eddy current displacement sensor is introduced.
介绍了基于激光位移传感器与电涡流位移传感器的位移差动法在线检测纸坯厚度的原理及测量系统的软硬件设计。
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