基于电涡流传感器的小位移测量系统设计  

A displacement measurement system by using eddy current sensor

作　　者：于明军[1] 孙福玉[1] 韩铮[1] 张迪[1] 

机构地区：[1]赤峰学院物理与电子信息工程学院,内蒙古赤峰024400

出　　处：《实验技术与管理》2015年第5期111-114,共4页Experimental Technology and Management

基　　金：赤峰学院教育教学研究项目(JYXM201318);内蒙古自然科学基金资助项目(2013MS0916)

摘　　要：针对物理实验中对小位移的测量读数困难的问题,提出了一种基于电涡流传感器测量小位移的方法。根据谐振原理设计了涡流传感器检测和调理电路,利用位移量影响谐振电路Q值的特性,实现了小位移量到电压量的转换,使用单片机采集信号并用软件方法对测量结果校准。实验结果表明,系统可以准确测量小位移,同时可消除使用物理测量工具时产生的读数误差。Aiming at the difficulty of reading measurement result of micro-displacement in physical experiments, this article proposes a new method to measure micro-displacement by Eddy current sensor. According to the principle of resonance, the eddy current sensor detection and signal modulation circuit was designed. By considering the features of micro-displacement influence the Q value of resonance circuit, the conversion from displacement to voltage is achieved. A chip microcomputer is used for the data acquisition and processing as well as adjusting measuring results. The results of the tests indicate that the design is reasonable and can get more accurate results. At the same time, the error in reading can be avoided.

关 键 词：位移测量 电涡流传感器 数据采集 微控制器 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]