A stochastic model for transient acoustic emission signals
A stochastic model for transient acoustic emission signals
复制标题
瞬态声发射信号的随机模型
DOI：
10.1121/1.382785
复制
发表时间：
1979
期刊：
影响因子：
--
通讯作者：
D. Egle
中科院分区：
文献类型：
--
作者：
D. Egle
瞬态声发射信号被表示为一个衰减指数和一个平均为零的平稳高斯随机过程的乘积。建立了给定电平上正向交叉数（计数）、衰减率、过零率和信号平稳部分的均方之间的关系。模拟声发射信号和实际声发射信号的水平交叉实验数据与推导出的关系吻合良好。给出了一种从实验数据中提取三个信号参数的方法。
A transient acoustic emission signal is represented as the product of a decaying exponential and a stationary Gaussian random process with zero mean. A relationship between the number of positive‐going crossings (counts) at a given level, the decay rate, the zero crossing rate, and the mean square of the stationary portion of the signal is developed. Experimentally determined level‐crossing data for both simulated and actual acoustic emission signals show good agreement with the derived relationship. A technique for extracting the three signal parameters from experimental data is given.