电涡流检测技术及影响因素分析-传感技术学报.PDFVIP

第 22 卷 　第 11 期 传 感 技 术 学 报 Vol . 22 　N o . 11 2009 年 11 月 CHIN ES E J OU RNAL OF S EN SORS AND AC TUA TORS N ov . 2009 Analysis of Detection Principle and Infl uential Factors of Eddy Current 1 1 2 2 L I Guie , M A H ong z h ao , S H E N J i aqi , H E Feng h ua 1 Col leg e of M ateri al an d Chem ical Eng i neeri ng Z hej i ang Uni vers ity , H ang z hou Z hej i ag 3 10027 , Chi na; 2 H angz hou Z hej i ang Uni vers ity H ong hao S cience Technology Co. , L t d. H ang z hou Z hej i ang 3 10027 , Chi na Abstract :To solve t he low co nt rol p reci sion an d sen sitivit y an d short lif e of t ravel swit ch or hall swit ch ,an amp lificatory eddy cur rent coilcon ductor det ection sy st em wa s de signed ,w hich wa s ba sed o n an eddycur rent sen sor det ection sy st em . The influential factor s ,inclu ding t he conductor size 、drivin g volt age 、t he rat e of t he coil an d t he con ductor t emp erat ure were analyzed t hrou gh collectin g dat a o nline . The se f actor s have influence on t he eddy cur rent int en sit y 、cont rol p reci sion an d sen sitivit y . The re sult s are of imp ort ance to t he p aramet er selection an d t he j u dgment of int erference f actor s in an eddy current det ector . Key words :elect ric eddycur rent effect ;conductor size ;drivin g volt age ;rat e ;t emp erat ure EEACC :7230 电涡流检测技术及影响因素分析 1 1 2 2 李贵娥 ,麻红昭 ,沈家旗 ,何丰华 1 浙江大学材料与化学工程学院 ,杭州 3 10027 ; 2 杭州浙大鸿浩科技有限公司 ,杭州市 3 10027 摘 　要 :针对行程开关 、霍尔开关检测位移的控制精度以及灵敏度低 、使用寿命短等缺点 ,在电