针对基本的数学形态滤波器存在的问题,提出了一种多尺度多元素形态滤波自适应降噪方法,首先利用不同尺度不同元素的基本形态滤波器对信号进行处理,得出各个误差.根据计算误差,设定权重系数级联基本的形态滤波器,对信号进行自适应降噪.针对正弦信号中复杂噪声干扰的特点,在信号中加入各种噪声,利用提出的方法对信号进行处理,并与多尺度滤波器进行了比较,证明了改进方法的有效性.通过将多尺度多元素形态滤波器应用于旋转检测地磁定向信号中分析与运算,有效降低了正弦信号中的噪声,提高了地磁定向精度,验证该方法降噪的有效性.%In light of the problem of the basic morphological filters, a new approach of multi-scale morphological filters was proposed. In the processing, the signal was filtered by morphological filters with different scale and different element. And the weight coefficient was set according to the error of each filter. The characters of sinusoidal signal considered, the different kinds of errors were added to the signal. And then the signal with errors was processed by the improved method and other kinds of methods. The results show that the improved method is effective and can be applied to the geomagnetic orientation system. The noise in the orientation system is reduced greatly, and the orientation accuracy is increased.
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