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首页> 外文期刊>International Journal of Heat and Mass Transfer >High heat flux point source sensitivity and localization analysis for an ultrasonic sensor array
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High heat flux point source sensitivity and localization analysis for an ultrasonic sensor array

机译：超声传感器阵列的高热通量点源灵敏度和定位分析

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摘要

State estimation procedures using the extended Kalman filter are investigated for a transient heat transfer problem in which a high heat flux point source is applied on one side of a thin plate and ultrasonic pulse time of flight is measured between spatially separated transducers on the opposite side of the plate. This work is an integral part of an effort to develop a system capable of locating the boundary layer transition region on a hypersonic vehicle aeroshell. Results from thermal conduction experiments involving one-way ultrasonic pulse time of flight measurements are presented. Uncertainties in the experiments and sensitivity to heating source location are discussed. One key finding is that sensitivity to heating source location is greater in the direction normal to the ultrasonic pulse propagation path. Scaled sensitivities to boundary conditions and thermal conductivity are presented and analyzed for all possible source locations using a square sensor grid. While sensitivity to the primary heat flux was determined to be the highest, sensitivity to the other parameters is either on the same order of magnitude or one order of magnitude less. Two different measurement models are compared for heating source localization: (1) directly using the one-way ultrasonic pulse time of flight as the measurement vector and (2) indirectly obtaining distance from the one-way ultrasonic pulse time of flight and then using these obtained distances as the measurement vector in the extended Kalman filter. Heating source localization results and convergence behavior are compared for the two measurement models. Two areas of sensitivity analyses are presented: (1) heat source location relative to sensor array position, and (2) sensor noise. The direct measurement model produced the best results when considering accuracy of converged solution, ability to converge to the correct solution given different initial guesses, and smoothness of convergence behavior.
机译：针对瞬态传热问题，研究了使用扩展卡尔曼滤波器的状态估计程序，在该瞬态传热问题中，将高热通量点源应用于薄板的一侧，并在与之相对的另一侧的空间分离换能器之间测量超声脉冲的飞行时间碟子。这项工作是努力开发一种能够在高超音速飞行器机身上定位边界层过渡区域的系统的组成部分。给出了涉及单向超声脉冲飞行时间测量的热传导实验的结果。讨论了实验中的不确定性和对热源位置的敏感性。一个关键发现是，在垂直于超声脉冲传播路径的方向上，对热源位置的灵敏度更高。使用正方形传感器网格，针对所有可能的源位置，呈现并分析了对边界条件和热导率的按比例缩放的灵敏度。虽然对一次热通量的灵敏度被确定为最高，但对其他参数的灵敏度却在相同数量级或更低一个数量级。比较了两种不同的测量模型以进行热源定位：（1）直接使用单向超声脉冲飞行时间作为测量矢量，（2）间接从单向超声脉冲飞行时间获取距离，然后使用这些测量模型获得的距离作为扩展卡尔曼滤波器中的测量向量。比较了两种测量模型的热源定位结果和收敛行为。提出了灵敏度分析的两个方面：（1）相对于传感器阵列位置的热源位置，以及（2）传感器噪声。考虑到收敛解的准确性，在不同初始猜测下收敛到正确解的能力以及收敛行为的平滑度，直接测量模型产生了最佳结果。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第10期|p.2472-2485|共14页
  • 作者

    M.R. Myers; A.B. Jorge; M.J. Mutton; D.G. Walker;

  • 作者单位

    Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235, United States;

    Mechanical Engineering Institute, Federal University ofltajuba, Itajuba, MG, Brazil;

    Industrial Measurement Systems, Inc., 2760 Beverly Drive, Suite 4, Aurora, IL 60502, United States;

    Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ultrasonic thermometry; ultrasound; sensitivity analysis;

    机译：超声波测温;超声;敏感性分析;

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