压电阻抗技术在结构健康监测中的应用研究

Review of Piezoelectric Impedance-based Structural Health Monitoring

压电阻抗原理在土木工程结构健康监测中的应用得到越来越多的关注。系统阐述了压电材料、压电阻抗原理、压电材料与被监测结构的相互作用模型,以及基于阻抗信息的监测技术,归纳了压电阻抗技术应用中压电材料尺寸选择、扫描频率选择、感应范围、粘结剂影响、数据采集设备的发展、数据处理方法等方面的研究成果,并对目前存在的问题进行了总结和分析。

The application of piezoelectric impedance-based structural health monitoring technology has re-ceived more and more attention. This paper summarizes theoretical and experimental problems of impedance-based structural health monitoring based on piezoelectric materials. The characteristics of piezoelectric materi-als, the principle of piezoelectric impedance, the interaction model between the piezoelectric transducer and the host structure and the concept of impedance-based monitoring are illustrated. The current achievement and difficult issues of impedance-based monitoring technology are reviewed, including size selection of piezoelectric patches, scanning frequency, sensing range, adhesive effect, data acquisition equipment and signal processing methods, etc.