自调整复合级联形态滤波算法及应用

Self Adjusting Composite Cascade Morphology Filter Algorithm and Its Application

针对反射式光纤位移传感器拾取的润滑膜厚度信号中的脉冲和随机噪声干扰,提出一种自调整复合级联数学形态滤波算法。采用三角结构元素和半圆结构元素,通过开闭和闭开组合滤波及串联构造了复合级联形态滤波算法。仿真结果表明,复合级联滤波算法可提高信号的信噪比。针对传统形态滤波方法结构元素宽度随机选取造成滤波后信号信噪比低的问题,通过在不同采样频率情况下对不同信号进行滤波仿真计算,提出一种结构元素参数自调整选取方法。仿真实验和对实际润滑膜厚度信号滤波处理结果表明,自调整复合级联形态滤波算法可有效滤除信号中的脉冲干扰和随机噪声干扰。

In order to eliminate the pulse and random noise interference of the lubricant film thickness signal obtained by the optic fiber displacement sensor,a filtering algorithm based on self adjusting composite cascade mathematical morphology is proposed.The triangular and semi-circular structural elements are adopted in the filter.The composite cascade morphology filtering algorithm is built with cascading openclose and close-open combinational filters.The simulation results show that the algorithm improves the signal-to-noise ratio(SNR).Meanwhile,in order to avoid a low SNR,which is caused by the random selection of structural element parameters,a self adjusting method for the structural element parameters is proposed.Both experimental and simulation analysis results show that the filtering algorithm based on the self adjusting composite cascade mathematical morphology can effectively eliminate the pulse interference and random noise interference of the lubricant film thickness signal.