反射導(dǎo)體參數(shù)對(duì)渦流柵傳感器非線性誤差影響的仿真分析
中國(guó)測(cè)試李 坤， 陶 衛(wèi)， 趙 輝， 楊景景， 蔡云澤
摘 要：渦流柵傳感器基于橫向電渦流效應(yīng)設(shè)計(jì)，其反射導(dǎo)體參數(shù)變化對(duì)傳感器測(cè)量準(zhǔn)確度的影響比較明顯，因此需要對(duì)反射導(dǎo)體尺寸、形狀參數(shù)進(jìn)行分析和優(yōu)化，使其能夠適應(yīng)更多高準(zhǔn)確度的測(cè)量場(chǎng)合。利用有限元分析方法（Maxwell軟件）建立渦流柵傳感器的線圈、反射導(dǎo)體模型，對(duì)不同尺寸、形狀參數(shù)的反射導(dǎo)體進(jìn)行仿真計(jì)算，分析反射導(dǎo)體長(zhǎng)度、寬度、形狀變化對(duì)渦流柵傳感器的影響。分析結(jié)果表明：為提高傳感器的準(zhǔn)確度，反射導(dǎo)體選用略大于線圈長(zhǎng)度和盡可能大寬度的兩邊半圓導(dǎo)體，為傳感器選擇合理的反射導(dǎo)體參數(shù)提供有利參考。
關(guān)鍵詞：Maxwell軟件；渦流柵傳感器優(yōu)化；有限元；反射導(dǎo)體
文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1674-5124（2016）01-0126-04
Simulation analysis of nonlinear error effects of conductor parameters on
eddy current sensors
LI Kun， TAO Wei， ZHAO Hui， YANG Jingjing， CAI Yunze
（Department of Instrument Science and Engineering，Shanghai Jiaotong University，Shanghai 200240，China）
Abstract: Because of lateral eddy current effect， eddy current sensors， if the conductor parameters are changed， will be greatly influenced in terms of measurement precision. Therefore， the size and shape and other parameters of the conductor needs to be analyzed and optimized， so that the sensor can be tuned for more high-precision measurement occasions. Coil and conductor models were created with finite elements analysis（FEA） to emulate and calculate different sizes and shapes of conductors and analyze how the sensor was influenced by the changes in conductor length， width and shape. The analytical results have demonstrated that the measurement precision of the sensor can be enhanced if the conductor is semicircular on both sides， slightly longer than its coil and as wide as possible. The study has provided a good way of choosing rational conductor parameters to improve the measurement precision of eddy current sensors.
Keywords: Maxwell software； eddy current sensor； FEA； conductor
