时栅的波动方程分析与行波形成新方法

分析时栅位移传感器运动坐标系的产生机理。为了简化时栅结构使之更易于产品化,在分析其波动方程的基础上,明确磁行波和电行波的联系与区别,进而提出一种新的行波形成方法以及相应的机械结构,从而构成一种新形式的时栅传感器。初步的试验结果表明,传感器产生出正确的电信号,证明此方法是可行的。至此摆脱了采用传统模式的运动磁场产生方法,加工工艺大大简化。

ANALYSIS OF FLUCTUATION FUNCTION IN TIME-GRATING AND NEW METHOD PRODUCING TRAVELLING WAVE

The principle to produce the motional coordinate in time-grating displacement sensor is analyzed.In order to sim- plify the structure of the time-grating sensor and make its manufacture easily,its fluctuation function is analyzed and the relation and distinction between electric travelling wave and magnetic travelling wave are discussed.Then a new method to produce traveling wave is proposed based on these discussions. The method is employed with its corresponding mechanical structure to form a new type time-grating sensor.Experimental results show that the sensor can generate correct signal and the method is feasible.Thus the traditional electrical machinery method can be replaced by a new method to produce the mo- tional magnetic field.This new method can simplify the manu- facture process greatly.