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基于时延的高精度泄漏点超声定向检测方法

廖平平 蔡茂林

廖平平, 蔡茂林. 基于时延的高精度泄漏点超声定向检测方法[J]. 北京航空航天大学学报, 2013, 39(3): 391-395.
引用本文: 廖平平, 蔡茂林. 基于时延的高精度泄漏点超声定向检测方法[J]. 北京航空航天大学学报, 2013, 39(3): 391-395.
Liao Pingping, Cai Maolin. High accuracy method of ultrasonic gas leak direction detection based on time delay estimation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(3): 391-395. (in Chinese)
Citation: Liao Pingping, Cai Maolin. High accuracy method of ultrasonic gas leak direction detection based on time delay estimation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(3): 391-395. (in Chinese)

基于时延的高精度泄漏点超声定向检测方法

基金项目: 国家科技支撑计划资助项目(2011BAF05B04)
详细信息
    作者简介:

    廖平平(1986-),男,湖南衡阳人,博士生,liaoping127324@yahoo.com.cn.

  • 中图分类号: TH412;TH865

High accuracy method of ultrasonic gas leak direction detection based on time delay estimation

  • 摘要: 针对当前气体泄漏点检测定向精度低的情况,提出一种基于时延的高精度超声检测方法.该方法利用3个呈等边三角形分布的超声传感器接收由泄漏点产生的超声波,根据3路信号的相对时延值确定泄漏点的方向.为克服采样间隔对时延估计精度的限制,采用基于三次样条插值的时延估计算法估计信号时延值,并对不同核窗长度下的各100组实验数据的时延值进行误差统计,得到其均方差并与其Cramér-Rao下界比较,发现二者的变化趋势具有良好的一致性.在此基础上研究了时延值均方差,超声传感器间距和泄漏点距离对定向精度的影响.结果表明:定向误差随时延值均方差增大而增大,随超声传感器间距增大而减小,随泄漏点距离增大而增大;定向精度比单超声传感器检测方法提高7~10倍.

     

  • [1] 蔡茂林,香川利春.气动系统的能量消耗评价体系及能量损失分析[J].机械工程学报,2007,43(9):69-74 Cai Maolin, Kagawa T.Energy consumption assesment and energy loss analysis in pneumatic system [J].Chinese Journal of Mechanical Engineering, 2007, 43(9):69-74(in Chinese) [2] Saidur R, Rahim N A, Hasanuzzaman M.A review on compressed-air energy use and energy savings [J].Renewable and Sustainable Energy Reviews, 2010,14(4):1135-1153 [3] Goodman M, Zeno J R, Mabbs L.Ultrasonic leak detecting apparatus: United States, 5955670[P].1999-09-21 [4] Izikoff M, Stumpf M, Samson H.System and method for leak detection: United States, 2010/0039271A1 [P].2010-3-18 [5] Edwards P A, Bruck F, Hennessy J.Sonic leak testing on ink delivery systems and ink jet heads: United States, 7770999B2 [P].2010-08-10 [6] Crespo R J.Evaluation of energy usage in the chemical industry and effective measures to reduce energy losses [D].Starkville: Mississippi State University, 2009 [7] Liao Pingping, Cai Maolin.Study on compressed air leak detection using ultrasonic detection technology and instrument [C]//Proceedings of 6th IEEE Conference on Industrial Electronics and Applications.Beijing, China: IEEE, 2011:1690-1693 [8] 冯若, 姚锦钟,关立勋, 等.超声手册[M].南京: 南京大学出版社, 1999: 254-260 Feng Ruo, Yao Jinzhong, Guan Lixun, et al.Ultrasonics handbook [M].Nanjing : Nanjing University Press, 1999: 254-260(in Chinese) [9] 植木孝.超音波式ガス漏洩検出器[J].センサ技術,1987,7(11):18-20 [10] Cespedes I, Huang Y, Ophir J, et al.Methods for estimation of subsample time delays of digitized echo signals [J].Ultrasonic Imaging, 1995,17(2):142-171 [11] Lai Xiaoming, Torp H.Interpolation methods for time-delay estimation using cross-correlation method for blood velocity measurement [J].IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1999, 46(2): 277-290 [12] Viola F, Walker W F.A spline-based algorithm for continuous time-delay estimation using sampled data [J].IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2005, 52(1): 80-93 [13] Carter G C.Coherence and time delay estimation [J].Proceedings of the IEEE, 1987, 75(2):236-255 [14] Walker W F, Trahey G E.A fundamental limit on delay estimation using partially correlated speckle signals [J].IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control,1995, 42(2): 301-308 [15] Viola F, Walker W F.A comparison of the performance of time-delay estimators in medical ultrasound [J].IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2003, 50(4): 392-401
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出版历程
  • 收稿日期:  2012-02-10
  • 网络出版日期:  2013-03-31

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