传感技术学报2011，Vol.24Issue(12)：1691-1695,5.DOI:10.3969/j.issn.1004-1699.2011.12.007
背衬对埋入混凝土中压电陶瓷激励声能的影响
Backing for the Influence of the Energy of Acoustic Signal of the Piezoelectric Sensor Embedded in Concrete
摘要
Abstract
The piezoelectric material-concrete module is an intelligent structure of a piezoelectric unit combined with concrete into which the unit was embedded. Such module can be used to monitor the health of the concrete structure. In order to enhance the acoustic signal created by the iezoelectric material, a piece of metal backing sticks on the piezoelectric ceramic disc to construct a piezoelectric unit. The method allows the receiver on the axial direction of the embedded iezoelectric unit received the acoustic signal energy enhanced more than 10 times. We got a curve of the relative acoustic signal energy increment versus the products of backing metal thickness and the excited acoustic frequency. From the analysis of the power spectrum of acoustic signal, the thickness of the metal backing does not make change the peak power frequency and the frequency bandwidth range of the acoustic signal power spectrum.关键词
混凝土/超声检测/压电/金属背衬/谱分析Key words
concrete/ultrasonic testing/piezoelectric/metal backing/spectrum analysis分类
数理科学引用本文复制引用
谭斌,陈雨,黄润,李鹏程,陈浩..背衬对埋入混凝土中压电陶瓷激励声能的影响[J].传感技术学报,2011,24(12):1691-1695,5.基金项目
国家自然科学青年基金(50808186) （50808186）
重庆市自然科学基金(CSTC.2008BB0155) （CSTC.2008BB0155）
