Hanning低通滤波在PSD法测量直管不直度中的应用

Application of Hanning Low pass Filter for the Measurement of Non straightness of Straight Tube with PSD

该文介绍了利用ＰＳＤ测量直管不直度的新颖方法，利用频谱分析的方法分别对不直度理论模型和实验数据作了分析，得出了不直度信号具有低频占优的频谱特征的结论，并由此提出了利用Ｈａｎｎｉｎｇ低通数字滤波器除高频噪声，从而解决了直管不直度曲线这种空域信号无法利用电学滤波的困难。

A novel method for measuring the non straightness of straight tube with PSD is briefly introduced in this paper.The frequency spectrum is used to analyze theoretical non straightness model and experimental data .Herefrom,the characteristic of main occupancy of low frequency is concluded. In order to filter the high frequency noise,Hanning Low pass Filter is utilized to overcome the difficulty in filtering high frequency noise of space domain signal such as the non straightness of straight tube with electronic filter.