多通带滤波技术及冷轧钢板振纹监测

分析数字带通滤波器的特点,结合低通、带通滤波器的设计特点,构造一种多通带的数字滤波器。这种滤波器能快速有效的提取出多个频段信息,并且能柔性地选择频段的上下限和频段数。分析冷轧钢板振纹的基本特点,再根据冷轧钢板振纹的在线监测要求实时显示出多个频段信息的特点,就需要一种高效的多通带滤波技术。鉴于此特点,设计一款基于VB. Net平台的冷轧钢板振纹在线监测软件,将所关心的低、中、高频段显示出来便于观察。此系统已经在某钢厂的冷轧车间中得到应用,结果证明对多频段的信号提取是比较理想的。

Chatter Mark Monitoring for Cold Rolled Steel Straps Using Multi-band-pass Filter

ABSTRACT: Characteristics of digital band-pass filter, combined with the characteristics of low-pass filter and band-pass filter, is analyzed and a digital multi-band-pass filter is therefore proposed to monitor chatter marks on cold rolled steel strap using vibration signals. The filter can help extract information with relatively shorter time in comparison with band-pass filters. Upper and lower limit can be chosen based on the monitoring housing of the cold rolling mill. The proposed multiple-band-pass filter and a monitoring system are realized using VB.Net software, which has been applied in a cold rolled workshop. The results demonstrate the capability of the proposed method.