时栅位移传感器中产生电行波信号的新方法.pdf

30 8 ELECT RON IC MEASU REMENT T ECHN OLOGY 2007 8 * 徐 君 彭东林 万文略 杨 伟 (重庆工学院电子信息与自动化学院 重庆 400050) : , , , : ; ; ; ; : T P212 : A Summarization of ways to produce electrical traveling wave signal in the design of timegrating displacement sensor and a brandnew way Xu Ju Pe g Do gli Wa We lue Ya g Wei ( Departme t of electro ic e gi eeri g,Cho gqi g I stitute of Tech ology,Cho gqi g 400050) Abstract: As for the former desig of timegrati g displaceme t se sor, based o the pri ciple of the cha geable coupli g coefficie t t ra sferri g to obtai the electrical traveli g wave, the result shows the traveli g wave sig al is w eak relatively a d is easy to be disturbed by surrou di g elect romag et ic e viro me t. Subseque tly, two ways to produce electrical traveli g w ave based o photoelectricity tech ology a d cha geable capacita ce are proposed. By a alyzi g a d summarizi g these ways me tio ed above, a bra d ew w ay to produce electrical traveli g w ave is proposed here. Keywords: traveli g wave; photoelectricity; coupli g coefficie t; capacit a ce; timegrati g 0 1 [ 1] , , , , ( ) , , [2] , : A si B cos+ A cosB si = A B si ( + ) = K si ( + , ) ( 1) ; , , , ( 1) ,