Launch Vehicle Pipeline Micro Leakage Acoustic Emission Detector

2022 16th Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2022-10-11 DOI:10.1109/SPAWDA56268.2022.10045917

Qiang Li, Fei Qiu, Fei-Ping Du, Zhaohui Yang, Shaofeng Wang

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Abstract

The airtightness of the rocket pipeline system directly affects the safety of the rocket. Soap bubble method as the airtight detection traditional method has been used for a long time, difficultly confirmed the position and easy to make misjudgment. We developed a portable acoustic system that is convenient and accurate to detect the leakage of the rocket pipelines with a novel algorithm in it. Firstly, a portable acoustic system is constructed after choosing the suitable component of the detecting system. Secondly, the leakage detection experiment was carried out to analyze the time-domain and frequency-domain characteristics of the leakage signal, and the results showed that there is a relation between the leakage rate and the envelope area of frequency. Finally, an algorithm that identified the leakage level is proposed, and it is reliable and accurate to judge the rocket pipelines leakage level. The experiment results show the new acoustic emission detection system can make a more efficient and accurate assessment of the leakage level.

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运载火箭管道微泄漏声发射探测器

火箭管路系统的气密性直接影响火箭的安全。肥皂泡法作为气密检测的传统方法，使用时间较长，定位困难，容易误判。研制了一种方便、准确的便携式火箭管道泄漏声检测系统，该系统采用了新颖的算法。首先，选择合适的探测系统组件，构建便携式声学系统。其次，进行泄漏检测实验，分析泄漏信号的时域和频域特性，结果表明泄漏率与频率包络面积之间存在一定的关系。最后，提出了一种泄漏水平识别算法，能够可靠、准确地判断火箭管道的泄漏水平。实验结果表明，新型声发射检测系统能够更加高效、准确地评估泄漏水平。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 16th Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)

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