| 摘要: |
| 传统的管道泄漏险测法如负压波诊断法要求有很强的实时性，常因不能及时捕捉到泄漏信号而造成诊断失 败，而声发射检测技术作为一种成熟的无损检测方法，可根据泄漏时流体与泄漏孔隙产生的声发射信号判断泄漏， 实现对泄漏信号的连续捕捉，在检测原理上有很大的优势。利用声发射技术对管道泄漏检测进行了试验研究,通过 对声发射信号进行时频域分析，实现了对泄漏信号的有效识别。试验结果表明,泄漏发生时的声发射能量主要集中 在140 460 kHz，随着泄漏距离的增加,在200 kHz处的声发射能量将产生较大的衰减，从而验证了应用声发射技术 进行管道泄漏检测的可行性。 |
| 关键词: 声发射 管道 泄漏检测 |
| DOI： |
| 分类号: |
| 基金项目:教育部新世纪优秀人才支持计划资助项目(NCET-05-0110);中石油集团中青年石油科技创新基金资助项目；教育部霍英东靑 年教师教育基金(91051) |
|
| Application of acoustic emission technique in pipeline leakage detection |
|
WANG Zhao-hui, ZHANG Lai-bin, XIN Ruo-jia,LIANG Wei
|
|
(College of Mechanical and Electronic Engineering in China VniversUy of Petroleum, Beijing 102249, China)
|
| Abstract: |
| Hie traditional pipeline leakage detecting method such as negalive pressure wave detecting method requirea a strong real time ability, and often cannot diagnose the leakage due to failing to catch the leakage signal in time. Acoustic e-raission technique as a ripe nondestmclive detecting technique can catch the leakage signal continuously according to the acoustic emission signal between the fluid and the leakage hole, and i& of most advantage in theory of detection. The acoustic emission technique was used in pipeline leakage detection by the laboratory research. The time-frequcncy attribute of the leakage acoustic emission signal was analyzed. The results show that main energy of leakage signal concentrates at 140 -160 kHz. With the increase of leakage distance，considerable energy attenuation comes out at 200 kHz, The results verifies the feasibility of using acoustic emiB&ion technique in pipeline leakage detection, |
| Key words: acoustic emis&ion; pipelines leakage detection |
