Basic Study on Measurement of Guided Wave Using Piezoelectric Film
Basic Study on Measurement of Guided Wave Using Piezoelectric Film
复制标题
压电薄膜导波测量的基础研究
DOI：
10.1299/kikaia.72.951
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Y. Fujimoto
中科院分区：
文献类型：
--
作者：
Yoshikazu Tanaka;T. Ikeda;K. Toiyama;Sotaro Kuwako;Y. Fujimoto
本文介绍了一种利用压电薄膜测量导波的方法。由于导波被认为是最有前途的管道快速远程检测技术，因此有几篇论文被投入其中。压电薄膜由于其灵敏度高、结构简单等优点，非常适合于导波的测量。本文首先推导了薄膜应变与输出电流的关系。结果表明，输出电流取决于薄膜的延伸方向和管道的径向之间的角度。同时还表明，通过使用叠层压电薄膜，输出电流取决于法向应变或剪切应变。最后，进行了导波测量实验，验证了理论推导的正确性。
In this paper, a method to measure the guided wave using piezoelectric film is described. Since the guided wave is expected as the most promising technique for rapid long-range inspection of pipe, several articles have been devoted. It is thought that the piezoelectric film is suited to the measurement of the guided wave for its excellent sensitivity and other good properties. First, in this paper the relationship between the strain and output current of the film is deduced. It is shown that the output current depends on the angle between the elongation direction of a film and the radial direction of a pipe. It is also shown that the output current depends on the normal strain or the shearing strain by the use of laminated piezoelectric films. Then, experiments of measuring the guided wave are performed and the validity of deduction is confirmed.