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计量学报  2016, Vol. 37 Issue (4): 375-379    DOI: 10.3969/j.issn.1000-1158.2016.04.09
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测量金属薄板表面波纹度参数的滤波器的研究
蒋光锐1,张浩1,刘李斌1,2,李春光1,3
1.首钢技术研究院, 北京 100043 2.北京科技大学新金属材料国家重点实验室, 北京 100083 3.东北大学材料与冶金学院, 辽宁 沈阳 110004
Study on Filters for Measuring Waviness Parameters on Metallic Sheet Surface
JIANG Guang-rui1,ZHANG Hao1,LIU Li-bin1,2,LI Chun-guang1,3
1. Shougang Research Institute of Technology, Beijing 100043, China
2. State Key Lab for Advanced Metals and Materials, University of Sci & Tech Beijing, Beijing 100083, China
3. School of Materials and Metallurgy, Northeastern University, Shenyang, Liaoning 110004, China
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摘要 分析了用于测量金属板表面波纹度的3种滤波器(JIS B 0610采用的2RC滤波器、SEP 1941采用的指数滤波器和ASME B46.1采用的高斯滤波器)的传输特性,比较了原始轮廓与不同滤波器得到的波纹度轮廓的频谱特性,并指出了不同滤波器得到的波纹度参数的差异。结果表明,3种滤波器的幅值没有振荡现象,但是幅值衰减速度有显著差异。在截止波长位置,高斯滤波器和指数滤波器的幅值衰减了50%,而2RC滤波器的幅值只衰减了25%。从相位特性看,高斯滤波器和指数滤波器均属于无相位移动滤波器,而2RC滤波器属于有相位移动的滤波器,在截止波长位置的相位移动约为1.05。对比发现,在相同的截止波长下,指数滤波器与高斯滤波器的传输特性完全一致。采用2RC滤波器得到的波纹度参数Wa比采用高斯滤波器得到的Wa约大0.1 μm。3种滤波器都无法同时完全抑制截止波长范围以外的成分而完全保留截止波长范围之内的成分。
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蒋光锐
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李春光
关键词 计量学波纹度滤波器金属薄板传输特性截止波长    
Abstract:Transmission characteristics of three different filters including 2RC filter, Gaussian filter and an exponential filter for measuring waviness parameters on metallic sheet surface were analyzed. Then, spectrums of waviness profiles calculated by different filters and that of primary profile were compared. Finally, waviness parameters on sheet surface through different filters were figured out. Although no amplitude oscillation exist for all of the three filters, differences among amplitude attenuation rate were noticed. At the cut-off wavelength, amplitude of the Gaussian filter and the exponential filter decrease a half and that of the 2RC decreases a quarter. For phase characteristic, the Gaussian filter and the exponential filter belong to phase correct filters and the 2RC filter belong to no phase correct filter whose phase shift about 1.05 at the cut-off wavelength. Furthermore, it could be found that the transmission characteristics of the Gaussian filter are exactly same as that of the exponential filter. Moreover, the waviness parameter measured by the 2RC filter is bigger 0.1μm than that measured by the Gaussian filter. Results show that all the three filters could not exactly suppress component beyond scope defined by cut-off wavelengths and remain component between the scope.
Key wordsmetrology    waviness    filter    metallic sheet    transmission characteristic    cut-off wavelength
收稿日期: 2015-08-20      发布日期: 2016-05-31
PACS:  TB92  
通讯作者: 蒋光锐     E-mail: guangrui82@qq.com
作者简介: 蒋光锐(1982-),男,四川成都人,首钢技术研究院高级工程师,博士,主要从事冷轧钢板表面及涂镀层分析技术和改性研究。guangrui82@qq.com
引用本文:   
蒋光锐,张浩,刘李斌,李春光. 测量金属薄板表面波纹度参数的滤波器的研究[J]. 计量学报, 2016, 37(4): 375-379.
JIANG Guang-rui,ZHANG Hao,LIU Li-bin,LI Chun-guang. Study on Filters for Measuring Waviness Parameters on Metallic Sheet Surface. Acta Metrologica Sinica, 2016, 37(4): 375-379.
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