CAJ | 학술논문

为有效抑制一种电磁流量计测量过程中产生的干扰，提高测量的精确度和稳定性，采用小波阈值去噪方法，将信噪比 SNR 和均方根误差 RMSE 作为去噪效果的评价指标，并按照小波阈值去噪的一般步骤，分析了小波基、阈值规则和变换尺度对去噪效果的影响。分析结果表明：小波基采用 sym8、阈值规则采用强制去噪以及变换尺度为8时，该电磁流量计的输出信号去噪效果最好。
위유효억제일충전자류량계측량과정중산생적간우，제고측량적정학도화은정성，채용소파역치거조방법，장신조비 SNR 화균방근오차 RMSE 작위거조효과적평개지표，병안조소파역치거조적일반보취，분석료소파기、역치규칙화변환척도대거조효과적영향。분석결과표명：소파기채용 sym8、역치규칙채용강제거조이급변환척도위8시，해전자류량계적수출신호거조효과최호。
To effectively restrain the interference appearing in the process of measurement with new e-lectromagnetic flow meter and enhance the accuracy and stability of the measurement,the wavelet threshold de-noising method is applied.SNR (signal noise ratio)and RMSE (root-mean-square error) are used as the indexes of noise elimination.The focus is put on the analysis of the effects of wavelet basis,threshold rule and transform scale on noise elimination.The result shows that when the wave-let basis uses Sym 8,and the threshold rule uses the forced noise suppression and the transform scale is 8,the de-noising quality is best.