摘要
针对于常规超声导波换能器激励能量有限的问题,采用了具有较高磁致伸缩系数和能量转换效率的新型超磁致伸缩材料Terfenol-D来研制管道超声导波激励换能器。通过使Terfenol-D材料产生振动并将振动耦合入管道来产生导波对管道进行检测,一次检测距离可达数10 m。在同等激励条件下,研制的激励换能器的能量是常规PZT材料的激励换能器的2.5倍以上,其对缺陷的定位精度<0.57%。
In view of the limited energy of conventional ultrasonic guided wave transducer, the new giant magnetostrictive material Terfenol-D which has high magnetostrictive coefficient and energy conversion efficiency has been a- dopted to develop the pipeline ultrasonic guided wave excitation transducer. By making the Terfenol-D material vibra- ting and transmit it into the pipe to produce guided wave and check the pipe, the detection range can be up to tens of meters. Under the same incentive conditions, the energy of the excitation transducer is 2.5 times higher than that of the conventional PZT material and the positioning accuracy of defects is less than 0.57%.
出处
《电子科技》
2017年第3期76-78,82,共4页
Electronic Science and Technology
