相关检测原理与相关算法

Correlation Detection Technique and Correlation Algorithm

讨论了相关原理在检测中应用的若干问题。以锅炉燃烧器火焰检测为背景,阐述了如何从实测信号中选取并分离出有用信号;如何在样本长度、采样精度及采样延时受到客观条件限制的情况下保证相关函数估计值的精度;如何消除信号非平稳性对相关函数估计及检测结果的影响,以及怎样在数值运算中提高精度,减小数值误差等。

Problems about the application of correlation principle to the detection or measurement are discussed. With flame detection of pulverised coal fired boiler being taken as a living example,it is shown how to draw useful message from spoiled signal, to fulfill precision demand of correlation coefficient estimation with limited sample length, limited sampling precision, and non-zero sampling delay, and to eliminate the effect of nonstationariness of the signal on correlation coefficient estimation and consequently the detection results. It is also concerned about how to improve the precision of data processing and decrease the detection error.