Calibration of an impact device and its application to the normalized spectral analysis of impact-echo tests

被引：5

作者：

Lin, Yiching

Yang, Chun-Kuei

Cheng, Chia-Chi

机构：

[1] Natl Chung Hsing Univ, Dept Civil Engn, Taichung, Taiwan

[2] Chaoyang Univ Technol, Dept Construct Engn, Wufeng 413, Taichung Cty, Taiwan

来源：

ADVANCED NONDESTRUCTIVE EVALUATION I, PTS 1 AND 2, PROCEEDINGS | 2006年 / 321-323卷

关键词：

piezoelectric sensor; impact device; calibration; normalized spectrum; acoustic impedance; layered structures; impact-echo;

D O I：

10.4028/www.scientific.net/KEM.321-323.381

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The objective of this paper is to introduce an impact device made by embedding a piezoelectric sensor into a steel sphere and to develop a calibration method for measuring the impact force. The force-time function of impact can be used to normalize the spectrum obtained from an impact-echo test. Furthermore, an approach was proposed to make the normalized spectrum dimensionless. A new technique based on the dimensionless normalized spectrum is developed to quantitatively evaluate the difference in acoustic impedance at the interface between two dissimilar materials. The impact-echo test results show that the dimensionless normalized spectrum is capable of identifying the degree of the difference in acoustic impedance at the interface between two dissimilar materials.

引用

页码：381 / 385

页数：5