超声导波电磁声换能器的研究进展

发布时间：2018-10-24 16:27

【摘要】：超声导波具有检测范围大、检测效率高等优点,广泛应用于板、管等典型波导结构的缺陷检测.作为超声导波换能器类型之一,电磁声换能器(electromagnetic acoustic transducer,EMAT)得到广泛关注和快速发展.综述了近20年来超声导波电磁声换能器的研究进展.主要包括:针对板和管结构超声导波检测的单模态EMAT结构设计;用于提高激励导波的能量和模态单一性的EMAT线圈与磁体结构参数的优化,针对非金属材料检测的新型贴片式EMAT的结构设计;阵列技术在EMAT性能优化上的应用和在缺陷定位和成像上的应用.
[Abstract]:Ultrasonic guided wave has the advantages of wide detection range and high detection efficiency. It is widely used in defect detection of typical waveguide structures such as plates and tubes. As one of the types of ultrasonic guided wave transducers, electromagnetic acoustic transducers (electromagnetic acoustic transducer,EMAT) have received extensive attention and rapid development. The research progress of ultrasonic guided wave electromagnetic acoustic transducer in recent 20 years is reviewed. It mainly includes: the design of single mode EMAT structure for ultrasonic guided wave detection of plate and tube structure, the optimization of structure parameters of EMAT coil and magnet used to improve the energy and mode singularity of guided wave. The structure design of a new type of EMAT for nonmetallic material detection, the application of array technology in EMAT performance optimization, and the application in defect location and imaging.
【作者单位】：北京工业大学机械工程与应用电子技术学院;
【基金】：国家自然科学基金资助项目(11527801,51475012,11272021) 北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD201304048)
【分类号】：TB552

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