快速付里叶变换在板形检测中的应用  

Application of FFT in flatness measurement

作　　者：毛小春[1] 杨西荣[2] 钟春生[2] 

机构地区：[1]上海宝山钢铁股份有限公司技术中心,上海201900 [2]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《重型机械》2004年第3期53-55,共3页Heavy Machinery

摘　　要：本文简述了付里叶变换原理及其快速算法在板形检测信号处理中的应用。通过在自行研制的动态板形检测模拟试验装置上测量板带的振动信息,采用快速付里叶变换对其进行频谱分析,获得板形缺陷信息,并将分析所得结果与剖条试验中实测的板带实际板形状况对比,两者对比结果是一致的、吻合的,从而为板形检测提供了一种新方法。The Fast Fourier Transform (FFT) is applied to spectral analysis of flatness measurement.In the experiment,the result of spectral analysis by FFT on vibration data from the self-made dynamic flatness measurement apparatus is compared with the defects of shape obtained.The conclusion that analysis result is consistent with the practical flatness measured in the experiment,in which the shape is divided into many strips,is obtained.It is proved the FFT is a new and effective method for flatness measurement.

关 键 词：板形检测 快速付里叶变换 频谱分析 信号处理 

分 类 号：TG335.5[金属学及工艺—金属压力加工] TN911.7[电子电信—通信与信息系统]