化工自动化及仪表
化工自動化及儀錶
화공자동화급의표
Control and Instruments in Chemical Industry
2015年
11期
1216-1219
,共4页
电涡流传感器%材料敏感性%阻抗投影变换%非线性补偿%相敏检波
電渦流傳感器%材料敏感性%阻抗投影變換%非線性補償%相敏檢波
전와류전감기%재료민감성%조항투영변환%비선성보상%상민검파
eddy current sensor%material sensitivity%projection transformation method%nonlinear compensa-tion%phase sensitivity detection
被测材料的电磁特性会影响传感器的输出性能，限制其使用范围。为此，在分析阻抗投影变换原理的基础上，设计了一种能实现该原理的测量电路，用以消除传感器对被测材料的敏感性。φ11 mm传感器输出测试实验的结果表明：所用7种被测材料经线性补偿后的输出特性曲线近似重合，可用一条直线替代，实现了消除材料敏感性的功能；计算出的传感器材料敏感性误差为±1．8％。
被測材料的電磁特性會影響傳感器的輸齣性能，限製其使用範圍。為此，在分析阻抗投影變換原理的基礎上，設計瞭一種能實現該原理的測量電路，用以消除傳感器對被測材料的敏感性。φ11 mm傳感器輸齣測試實驗的結果錶明：所用7種被測材料經線性補償後的輸齣特性麯線近似重閤，可用一條直線替代，實現瞭消除材料敏感性的功能；計算齣的傳感器材料敏感性誤差為±1．8％。
피측재료적전자특성회영향전감기적수출성능，한제기사용범위。위차，재분석조항투영변환원리적기출상，설계료일충능실현해원리적측량전로，용이소제전감기대피측재료적민감성。φ11 mm전감기수출측시실험적결과표명：소용7충피측재료경선성보상후적수출특성곡선근사중합，가용일조직선체대，실현료소제재료민감성적공능；계산출적전감기재료민감성오차위±1．8％。
Electromagnetic properties of the target materials can affect the sensor’ s output performance and re-strain its range of application.Basing on analyzing the projection transformation method, a kind of measure-ment circuit was designed to eliminate the objective material’ s sensitivity.Testing the output of the φ11mm sensor indicates that, after to be compensated linearly, the output characteristic curves of the seven testing ma-terials nearly overlap and can be replaced by a straight line, it can eliminate the material sensitivity and the material’ s error sensitivity calculated of the sensor stays at ±1.8%.
