Research on Ultrasonic Leakage detection of Military Aircraft Gas System
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摘要: 利用FIR带通数字滤波器、混沌系统和AR模型功率谱估计相结合的方法, 实现在有较大噪声背景的机场环境下对飞机气体系统泄漏超声信号的提取。给出了基于该理论的具体算法及设计思路, 进行了基于Matlab/simulink的仿真。经验证, 该方法能够实现飞机气体管路的微小泄漏的检测, 大大减少了背景噪声的影响, 为飞机气体系统泄漏检测提供了新的思路。Abstract: The method of bandpass digital filter, chaos theory and AR model spectrum estimation was used to test the ultrasonic signal of airplane gas system leakage from strong background noise on airport. The design and method based on the theory were given and simulated by Matlab/simulink. It was verified that the method can detect the tiny leakage of aircraft gas system and reduce the influence of noise. It is a new leakage detection of aircraft gas system.
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Keywords:
- Gas leakage /
- Ultrasonic testing /
- FIR filter /
- Chaos system /
- Spectrum estimation
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[1] 马大猷.现代声学理论基础[M].北京: 科学出版社, 2004: 296-306. [2] 江洋, 龚其春, 叶骞, 等.气体泄漏量超声检测理论分析与实验[J].上海交通大学学报, 2006, 40(2): 224-226. [3] 王秀, 程建政, 倪园.高速超声信号采集系统的设[J].无损检测, 2009, 31(2): 144-146. [4] 李伟, 郭福平.气体管道泄漏声源产生机理仿真研究[J].压力容器, 2008, 25(4): 12-15. [5] Moon C, Brown W C, Mellen S, et al. Ultarsound techniques for leak detection in vehicle and pressure vessel production lines[C]. Noise-Con, Dearborn Michigan: 2008. [6] Moon C, Brown W C, Mellen S, et al. Pickering ultrasound techniques for leak detection[C]. SAE N & V Conference. USA: SAE 2009-01-2159: 2009. [7] 聂春燕, 徐振忠.混沌系统在弱信号检测中的应用[J].传感器技术, 2003, 22(1): 55-57. [8] Chunyan Nie, Yao wu Shi , Wensuo Yi. Analysis of chaotic system characters based on time frequency distribution[C]. Intelligent Control and Automation, Dalian, 2006: 4842-4845. [9] 姜礼平.有噪声场合自回归模型的参数估计及定价[J].应用数学, 2001, 14(2): 64-68. [10] Bos R, Waele S de, Broersen P M T. AR spectral estimation by application of the burg algorithm to Irregularly sampled data[C]. IEEE Instrumention and Measurement Technology Conference May 21-23, 2001.
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