用R/S分析进行超声信号处理方法研究

Research on Ultrasonic Signal Processing Methods Through R/S Analysis

以分形理论为基础,对得到的超声数字信号的时域波形进行非线性分析,即采用重标度极差分析(R/S分析)计算信号的Hurst指数,得到信号在承受各级荷载下的Hurst指数变化情况。结果表明,Hurst指数变化与混凝土的损伤情况存在一定的关系,可为混凝土的早期损伤识别提供借鉴。

The ultrasonic digital signals＇ time-domain waveform was analyzed by nonlinear method based on the fractal theory, and the Hurst dimension of signals was calculated through Scaling-Range analysis （R/S analysis）, to get the Hurst dimensionchanges of ultrasonic signal received at each level load. The data showed that a certain relationship is existed between Hurst dimension change and the concrete damage, which can provide reference for the identification of concrete early injury.