Phenomenological detectors for crack echo families in elastic solids
Phenomenological detectors for crack echo families in elastic solids
复制标题
弹性固体中裂纹回波族的唯象探测器
DOI：
10.1121/1.1760108
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
M. Gustafsson
中科院分区：
文献类型：
--
作者：
D. Asraf;M. Gustafsson
低复杂性的现象学探测器的潜在性能在弹性固体中的裂纹回波家庭进行评估。居住在一个各向同性的弹性固体与粗糙的微观结构中的带状裂纹的超声回波被认为是和实现的检测器性能相比，通过最近提出的基于物理的最佳检测器获得的理论上限（仅受基础物理约束）。基于时域脉冲响应方法，建立了散射过程的唯象信号模型，并用于推导依赖于少量参数的低数值复杂度探测器。建议的检测器进行比较接收器的工作特性曲线，这是通过Monte Carlo模拟计算的情况下，一个带状裂纹与不确定的角取向。最小误差概率准则被用来优化检测器参数的仿真研究和显示。
The potential performance of low-complexity phenomenological detectors for crack echo families in elastic solids is evaluated. Ultrasonic echoes from a strip-like crack residing in an isotropic elastic solid with coarse microstructure are considered and the achieved detector performance is compared to the theoretical upper bounds (constrained only by the underlying physics) obtained by means of a recently presented physics-based optimal detector. A phenomenological signal model for the scattering process is formulated based on the time-domain impulse-response method and used to derive detectors of low numerical complexity which are dependent on a small number of parameters. The proposed detectors are compared in terms of receiver operating characteristic curves, which are computed by means of Monte Carlo simulations for the case of a strip-like crack with uncertain angular orientation. The minimum probability of error criterion is used to optimize the detector parameters for the simulation study and shown...