利用小波阈值法对火焰闪烁频率消噪

Noise Absorption to Flame Flicker Frequency Using Wavelet Threshold

在工业现场锅炉燃烧过程中,火焰检测器是观测锅炉火焰燃烧状态必不可少的,对锅炉的安全运行是至关重要的。然而工业现场中有很多因素对火焰闪烁信号有很大的影响,白噪声是非常重要的一个因素。为了准确判断锅炉的工作情况,我们对火焰闪烁频率的特征、白噪声和噪声的小波分析进行了较为详尽的描述,利用Daubechies小波的heursure阈值法对炉膛火焰信号中的白噪声进行消噪,取得了较好的效果。

During the combustion of industrial burner,flame detector is essential to observe the state of combustion and vital to the safety of burner.But many factors have great influence to flame flicker signal at the industrial scene,white noise is very important.In order to judge the situation of boiler operation exactly,we describe at large about the feature of flame flicker frequency,white noise and wavelet of noise.The usage of Daubechies wavelet heursure threshold to absorb white noise in flame signal has a good result.