超声波导位移传感器的研究

Study of ultrasonic waveguide displacement transducer

本文讨论了一种新型超声波导位移传感器的工作原理、结构及控制电路的设计等。该传感器利用磁致伸缩效应和超声效应二者的结合达到位移测量目的。它能够确定一个扭转脉冲从可动磁铁沿波导管传递到声脉冲响应装置的时间,而该时间和可动磁铁到脉冲响应装置间的距离成正比。

A new type of ultrasonic waveguide displacement transducer is disclosed in this thesis , including the principle, the structure and the controling circuits design. The transducer utilizes a combination of magnetostriction effect and ultrasonic effect for the displacement measuring. In the transducer, the time that takes a torsion pulse to traverse a sonic waveguide from a movable permanent magnet to a pulse responsive element is determined and proportional to the distance from the magnet to the pulse responsive element.