公开(公告)号：US09784756B2

公开(公告)日：2017-10-10

申请号：US14273745

申请日：2014-05-09

Applicant: KOREA INSTITUTE OF MACHINERY & MATERIALS

Inventor： Dongwoo Kang ,  Taik Min Lee ,  Seung-Hyun Lee ,  Young Man Choi ,  Deokkyun Yoon ,  Kwang-Young Kim ,  Jeongdai Jo

IPC: G01P3/36 ,  G01P3/54

CPC classification number: G01P3/54

Abstract: A method of measuring feeding velocity of a web, on which a scale having pitches different from pitches of a mask are formed, is provided. The method includes: calculating a number of vibrations of a moiré image of light passing through the mask and the scale; calculating pitches of the scale of the fed web based on the calculated number of vibrations of the moiré image; averaging the pitches of the scale so that a change in a pitch between adjacent timings among the calculated pitches of the scale is minimized; extracting first signals corresponding to our phases for one pitch based on the averaged pitches of the scale; calculating two second signals for forming a Lissajous circle from the first signals; and calculating an angle of the Lissajous circle by the two second signals and then calculating the feeding velocity of the web by using the calculated angle.

公开(公告)号：US20140333919A1

公开(公告)日：2014-11-13

申请号：US14273745

申请日：2014-05-09

Applicant: KOREA INSTITUTE OF MACHINERY & MATERIALS

Inventor： Dongwoo KANG ,  Taik Min Lee ,  Seung-Hyun Lee ,  Young Man Choi ,  Deokkyun Yoon ,  Kwang-Young Kim ,  Jeongdai Jo

IPC: G01P3/36

CPC classification number: G01P3/54

Abstract: The present invention relates to a method of measuring web feeding velocity by using an encoder. A method of measuring feeding velocity of a web, on which a scale having a different pitch from a pitch of a mask is formed, includes: calculating a number of vibrations of a moiré image of light passing through the mask and the scale; calculating scale pitches of the fed web based on the calculated number of vibrations of the moiré image; averaging the pitches so that a change in a pitch between adjacent timings among the calculated scale pitches is minimized; extracting first signals corresponding to a plurality of phases for one pitch based on the averaged pitch; calculating second signals for forming a Lissajous circle from the signal corresponding to the plurality of phases; and calculating an angle of the Lissajous circle by the second signals for forming the Lissajous circle and then calculating the feeding velocity of the web by using the calculated angle.

Abstract translation: 本发明涉及一种通过使用编码器测量幅材进给速度的方法。 一种测量纤维网的进给速度的方法，其上形成具有与掩模的间距不同的间距的标尺，包括：计算穿过面罩的光的莫尔图像的振动和刻度; 基于计算出的莫尔图像的振动次数来计算馈送幅材的刻度间距; 对间距进行平均，使得计算的刻度间距之间的相邻定时之间的间距的变化被最小化; 基于平均间距提取与多个相位相对应的一个音调的第一信号; 从对应于所述多个相位的信号计算用于形成李萨如圆的第二信号; 并且通过用于形成李萨诸圈的第二信号计算李萨诸圈的角度，然后使用计算出的角度来计算卷材的进给速度。