Real time extraction system using double-layered piezoelectric transducer for second-harmonic ultrasonic pulse waves

被引：25

作者：

Fukuda, Makoto ^{[1
]}

Nishihira, Morimasa ^{[1
]}

Imano, Kazuhiko ^{[1
]}

机构：

[1] Akita Univ, Dept Elect & Elect Engn, Fac Engn & Resource Sci, Akita 0108502, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 5B期

关键词：

double-layered piezoelectric transducer; second-harmonic pulse waves; alternately inverse phases burst sinusoidal waves; real time; pulse echo;

D O I：

10.1143/JJAP.45.4556

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A novel detection system for second harmonic ultrasonic pulse waves is constructed by modifying an existing system using a double-layered piezoelectric transducer (DLPT). Two unique methods are introduced into the system, namely, the switching of the electrical connection of the DLPT and the pulse inversion excitation method, in which the DLPT is excited by both in-phase and out-of-phase pulses alternatively and averaged to cancel the fundamental and odd harmonic components. As a result of using these two methods, enhanced second harmonic waves are displayed on an oscilloscope in real time, and an improved sensitivity of 80 dB is obtained. Finally, drilled holes are imaged as an application of the new system and to demonstrate its usefulness.

引用

页码：4556 / 4559

页数：4

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