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介绍一种变面积式电涡流位移传感器的测量原理，利用这种方法可以克服变距式电涡流位移传感器起始误差明显和线性度较差的缺点。同时，本文还给出了以８０３１ 单片机为基的测试系统软硬件设计以及应该注意的若干问题。
This paper introduces a measuring principle of variable area eddy current displacement sensor, which can overcome the shortcoming of obvious start error and poor linearity of variable pitch eddy current displacement sensor. At the same time, this paper also gives the hardware and software design of test system based on 8031 MCU and some problems that should be noticed.