充液管道中声发射波的传播及衰减特性研究  

Study on Propagation and Attenuation Characteristics of Acoustic Emission Wave Propagation along Fluid Loaded Pipeline

作　　者：孙立瑛[1] 李一博[1] 靳世久[1] 刘铁根[1] 王伟奎[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室

出　　处：《压电与声光》2008年第4期401-403,共3页Piezoelectrics & Acoustooptics

基　　金：国家自然科学重点基金资助项目(60534050);天津市高等学校科技发展计划基金资助项目(2007-1103)

摘　　要：分析了声发射波在液体载荷作用下管道中的声学特性,并对钢管中的几种不同模态的声发射波在液体管道中的传播和衰减特性进行了测量。以一条长41.4 m的充水管道为例,对水载作用下的声发射管道泄漏检测及定位技术进行了研究,当管道内压力为0.6 MPa,两传感器相距40 m时,采用相关分析等信号处理方法,可检测到直径1 mm的针孔形泄漏,相对定位误差为2.9%。Acoustic characteristics of acoustic emission wave propagating along fluid-loaded pipeline were analyzed theoretically, and propagation speed and attenuation rate of different types of acoustic emission wave mode were measured. Acoustic emission pipeline leakage detection and location technology was researched and experiments were carried out on an 41.4 meter long water-loaded pipeline. When pressure in the pipe was 0.6 MPa and distance between two AE sensors was 40 m, and when cross-correlation signal processing method was applied, leakage with 1 mm diameter could be detected and relative location error was 2.9 %.

关 键 词：声发射 频散分析 充液管道 

分 类 号：TP274.21[自动化与计算机技术—检测技术与自动化装置]