航天器环境工程Issue(2)：178-181,4.DOI:10.3969/j.issn.1673-1379.2014.02.013
载人航天器内超声在轨检漏的应用基础研究
The leak ultrasonic detection test for manned spacecraft
摘要
Abstract
The leak in a manned spacecraft on orbit will lead to disaster, so the leak should be tested and located in time, and the ultrasonic leak detection is an effective method to solve the problem. The generation of ultrasonic waves in the spacecraft leak is analyzed and the center frequency is calculated. Based on the ultrasonic attenuation theory, experiments are carried out and the obtained data are used to fit the attenuation curves and equations of four different leaks. And the verification test is used to validate the fitted curves. It is shown that, in the range from 20 mm to 500 mm, the acoustic pressure level decreases according to the first order exponential decay model and increases with the leak aperture diameter. This paper provides some basic ideas of the on-orbit ultrasonic leak detection system.关键词
载人航天器/泄漏检测/超声波/声衰减/仿真分析/试验验证Key words
manned spacecraft/leak detection/ultrasonic wave/acoustic attenuation/simulation analysis/test validation分类
通用工业技术引用本文复制引用
李唯丹,闫荣鑫,孙伟,綦磊..载人航天器内超声在轨检漏的应用基础研究[J].航天器环境工程,2014,(2):178-181,4.基金项目
中国空间技术研究院创新基金项目“载人航天器在轨泄漏超声的声学机理研究”；北京卫星环境工程研究所自主研发项目“载人航天器超声在轨检漏技术研究” （）
