测量金属薄板表面波纹度参数的滤波器的研究

doi:10.3969/j.issn.1000-1158.2016.04.09

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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 words： metrology waviness filter metallic sheet transmission characteristic cut-off wavelength

Received: 20 August 2015 Published: 31 May 2016

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TB92

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	Articles by authors
	JIANG Guang-rui
	ZHANG Hao
	LIU Li-bin
	LI Chun-guang

Cite this article:

JIANG Guang-rui,ZHANG Hao,LIU Li-bin, et al. Study on Filters for Measuring Waviness Parameters on Metallic Sheet Surface[J]. Acta Metrologica Sinica, 2016, 37(4): 375-379.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2016.04.09 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2016/V37/I4/375

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