一种用于焊缝检测的压电式特征导波传感器  

Piezoelectric Sensor Based on Feature-guided Wave for Weld NDT

作　　者：洪红[1] 许桢英[1] 刘欢[1] 余慧芳[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《仪表技术与传感器》2016年第3期10-13,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金资助(51179076);江苏省镇江市科技支撑项目(SH2012016)

摘　　要：超声导波检测是近年来发展起来的无损检测新方法,对于焊缝等特征部位检测具有广阔的应用前景,但是目前国内外用于焊缝探伤的专用导波传感器仍不多见。因此,在现有横波探头的基础上,基于特征导波原理,设计了一套适合焊缝检测的激励、接收传感器。经性能测试,所设计的传感器能实现焊缝导波的有效激励和接收,保证所激励模态的单一性和回波信号的高反射率,为导波技术在焊缝无损检测中的真正应用提供了条件。Ultrasonic guided-wave testing is a new nondestructive testing method developed recently,which has broad application prospects for weld testing,while there are rare special guided wave transducers for weld inspection at home or abroad. In this paper,a set of exciting and receiving transducer for weld detection was designed on the basis of shear wave probe according to feature guided wave. Finally,its performance was tested,which showed that it can excite and receive signal effectively with few-mode and high reflectivity. It is beneficial for the real application of guided wave technology in weld nondestructive testing.

关 键 词：特征导波 焊缝检测 导波传感器 压电式 

分 类 号：TB4[一般工业技术]