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    • 10. 发明授权
    • Thickness detecting sensor
    • 厚度检测传感器
    • US07019539B2
    • 2006-03-28
    • US10843002
    • 2004-05-11
    • Toshimitsu FujiwaraHideyuki BingoMasahiro Kinoshita
    • Toshimitsu FujiwaraHideyuki BingoMasahiro Kinoshita
    • G01R27/26
    • G01B7/08
    • A thickness detecting sensor can widely set a dynamic range for detecting the thickness of a medium, and exactly detect the thickness of the medium even when the dynamic range is widely set in this way. Therefore, the thickness detecting sensor has a fixing electrode and a movable electrode arranged so as to be opposed to each other, a plunger for changing the gap between the electrodes by coming in contact with the medium, and a CR oscillating circuit and an FV converting circuit for converting electrostatic capacity stored between the electrodes into an electric signal for detecting the thickness of the medium. The rear end portion of the plunger comes in contact with the electrode face of the gap side of the movable electrode. The movable electrode is displaced in the direction separated from the fixing electrode correspondingly to the thickness of the medium.
    • 厚度检测传感器可以广泛地设置用于检测介质厚度的动态范围,并且即使当以这种方式广泛设置动态范围时,也能精确地检测介质的厚度。 因此,厚度检测传感器具有固定电极和布置成彼此相对的可动电极,用于通过与介质接触来改变电极之间的间隙的柱塞,以及CR振荡电路和FV转换 用于将存储在电极之间的静电电容转换成用于检测介质厚度的电信号的电路。 柱塞的后端部与可动电极的间隙侧的电极面接触。 对应于介质的厚度,可移动电极沿着与固定电极分离的方向移位。