In the application of Structural Health Monitoring (SHM) methods and related technologies, the transducer used for electroacoustic conversion has gradually become a key component of SHM systems because of its unique function of transmitting structural safety information. By comparing and analyzing the health and safety of large-scale structures, the related theories and methods of Structural Health Monitoring (SHM) based on ultrasonic guided waves are studied. The key technologies and research status of the interdigital guided wave transducer arrays which used for structural damage detection are introduced. The application fields of interdigital transducers are summarized. The key technical and scientific problems solved by IDT for Structural Damage Monitoring (SHM) are presented. Finally, the development of IDT technology and this research project are summarised.

中文翻译：

---

用于结构损伤监测的叉指换能器（IDT）的研究进展

在结构健康监测（SHM）方法和相关技术的应用中，用于电声转换的换能器由于其传递结构安全信息的独特功能而逐渐成为SHM系统的关键组件。通过比较和分析大型结构的健康和安全性，研究了基于超声波的结构健康监测（SHM）的相关理论和方法。介绍了用于结构损伤检测的叉指式导波换能器阵列的关键技术和研究现状。总结了叉指式换能器的应用领域。介绍了IDT解决的结构损伤监测（SHM）的关键技术和科学问题。最后，