Shear horizontal (SH) waves are of great importance in structural health monitoring (SHM) and nondestructive testing (NDT), since the lowest order SH wave in isotropic plates is non-dispersive. The SH waves in plates, circumferential SH waves and torsional waves in pipes have remarkable resemblances in dispersion characteristics and wave structures, so the latter two can also be called as SH waves in pipes. This paper reviews the state-of-the-art research on SH wave transducers for SHM and NDT. These transducers are grouped into the following categories: Lorentz-force-based electromagnetic acoustic transducers (EMATs), magnetostrictive EMATs, shear wave piezoelectric wedge transducers, thickness-shear piezoelectric transducers and face-shear piezoelectric transducers. The working principles, applications, merits and limitations of different kinds of SH wave transducers are summarized, with a focus on discussing the various configurations for exciting and receiving directional, omnidirectional SH waves in plates and torsional waves in pipes. This paper is expected to greatly promote the applications of SH waves in SHM, NDT and the related areas such as elastic metamaterials.

水平剪切（SH）波在结构健康监测（SHM）和无损检测（NDT）中非常重要，因为各向同性板中最低阶的SH波是非分散的。板中的SH波，管中的周向SH波和扭转波在弥散特性和波结构方面具有明显的相似之处，因此后两者也可以称为管中的SH波。本文回顾了用于SHM和NDT的SH波换能器的最新研究。这些换能器分为以下几类：基于洛伦兹力的电磁声换能器（EMAT），磁致伸缩EMAT，剪切波压电楔形换能器，厚度剪切压电换能器和面剪切压电换能器。工作原理，应用，总结了各种SH波换能器的优缺点，重点讨论了用于激发和接收板中的定向，全向SH波以及管道中的扭转波的各种配置。有望极大地促进SH波在SHM，NDT及其相关领域（如弹性超材料）中的应用。