基于检测的脉冲噪声滤除方法

为了将柴油机瞬时转速信号中的脉冲噪声滤除,使用了基于检测的脉冲噪声滤除方法。在已有的检测方法基础上,计算被检测点与中值之差将已有的检测方法可能漏掉的脉冲噪声检测出来,改进了脉冲噪声的检测方法来保护信号的细节信息。而且此方法对脉冲噪声干扰较为严重的信号特别有效。使用本方法对含有大量脉冲噪声的柴油机瞬时转速信号的滤波结果表明,改进的脉冲噪声检测法能够更准确地检测出脉冲噪声,更好地保护信号中的细节信息。

Impulse Noise Denoising Method Based on Detection

In order to decrease the impulse noise d transient speed signal d diesel engine,a method based on impulse detection is used.Exist- ing detection computes the difference between a point and its next point in rank order to decide if the noise is impuse noise.Because the existing method may loose some impulse,a method computing the difference of the checked point and the median value among this point is proposed.It is specially fit for the seriously corrupted signals.Experimental results show that the method can identify the impulse noise more correctly and it can preserve the details of the original signal better.