摘要
在摆动天平法的研究中,为了准确地采集到天平横梁摆动的位移信号,需要设计一款测量范围20mm左右,灵敏度高于0.1V/mm的位移传感器。针对摆动天平法研究中对位移信号检测的要求,作者分析了非接触性测量中的电涡流式位移传感器的基本结构和工作原理,设计了一种用于检测天平横梁摆动信号的电涡流式位移传感器,并通过实验对自主设计的涡流传感器的线性度、灵敏度、迟滞以及重复性进行了测试。实验结果表明该传感器在20mm范围内,输出与线性拟合值差值的相对标准差小于3.46×10-3,相对迟滞误差小于0.0045,适合用于摆动天平法课题研究中对天平垂直摆动位移的测量。
In the balance oscillation system,in order to accurately measure the displacement signal,an appropriate sensor is needed to be designed.The range of the sensor is 20mm and the sensitivity of the sensor is 0.1V/mm.The structure and working principle of the eddy current sensor in non-contact measurement are presented.This paper designes an eddy current sensor to measure the displacement for balance oscillation system.It analyzes the linearity,sensitivity,hysteresis and repeatability of the eddy current sensor through simple experiments.In the 20mm range,the relative standard deviation of linear fitting is less than 3.46×10-3,and the hystersis relative deviation is less than 0.0045.The results show that the eddy current sensor is suitable for the study of the balance oscillation system.
出处
《电测与仪表》
北大核心
2012年第3期92-96,共5页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51077120)
国家公益研究基金资助项目(201010010)
关键词
电涡流传感器
线性度
迟滞
稳定性
eddy current sensor
linearity
hysteresis
stability
