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    • 5. 发明授权
    • Capacitive liquid level sensor with integrated pollutant film detection
    • 具有综合污染物膜检测功能的电容式液位传感器
    • US6073488A
    • 2000-06-13
    • US208500
    • 1998-12-10
    • Anghony ByattThomas ChristenThomas KleinerDaniel MatterWalter Ruegg
    • Anghony ByattThomas ChristenThomas KleinerDaniel MatterWalter Ruegg
    • G01F23/26G01R27/26
    • G01F23/266G01B7/085G01F23/268
    • The subject matter of the present invention is a method and a device for capacitive liquid level measurement which are particularly suitable for determining liquid level between adhesive media 10, 11 of different conductivity. The known sensor principle is based on the fact that the environmentally dependent capacitance is measured between neighboring electrodes 13, 4; 4, 5; 5, 6 of a rod-shaped probe 1. According to the invention, the probe 1 has electrodes 4, 5, 6, 13 with covers 7 of different thicknesses d.sub.i. The effective thickness d.sub.s /.epsilon..sub.s of an insulating pollutant film 14 can then be determined by capacitance measurements between at least two pairs of electrodes 4, 5, 6, 13. The influence of a conductive pollutant film 14 on the capacitance signal can be eliminated by selection of at least one suitable measuring frequency. Furthermore, by optimizing the electrode height h, a large capacitance jump is achieved for a digital liquid level display, and/or a largely continuous increase in capacitance is achieved for an analog liquid level display. The sensor is preferably used to determine the location of an interface 12 between water 10 and oil 11 in a separator tank.
    • 本发明的主题是用于电容式液位测量的方法和装置,其特别适用于确定不同导电性的粘合剂介质10,11之间的液面。 已知的传感器原理基于以下事实:在相邻电极13,4之间测量环境依赖电容; 4,5; 5,根据本发明,探针1具有电极4,5,6,13,其具有不同厚度的盖7。 然后可以通过至少两对电极4,5,6,13之间的电容测量来确定绝缘污染物膜14的有效厚度ds /ε。可以消除导电污染物膜14对电容信号的影响 通过选择至少一个合适的测量频率。 此外,通过优化电极高度h,对于数字液位显示器实现了大的电容跳跃,和/或对于模拟液位显示器实现了电容的大幅度连续增加。 传感器优选地用于确定分离器箱中的水10和油11之间的界面12的位置。
    • 7. 发明授权
    • Clamping device with mechanical servo mechanism
    • 带机械伺服机构的夹紧装置
    • US4905975A
    • 1990-03-06
    • US229907
    • 1988-08-08
    • Walter Ruegg
    • Walter Ruegg
    • B23B31/02B25B1/10B25B1/14F16H21/54
    • F16H21/54B25B1/106B25B1/14
    • A clamping device with a mechanical servo mechanism having an axially movable plunger (3) and a clamping sleeve (6) which surrounds the servo mechanism and which engages by an external thread (6a) in an internal thread (2a) of a stationary housing (2). A clamping member (7), one end of which is supported on the plunger (3), is axially slidable in and non-rotatably connected to the clamping sleeve (6). Furthermore, an abutment (9) connected to an operating lever (10) is rotatable to a limited extent in the clamping sleeve (6). Between the clamping member (7) and the abutment (9) are disposed several studs (11). The external thread (6a) is provided directly on the outer circumference of the clamping sleeve (6), concentrically to the region of the clamping member (7) and the studs (11). A compression spring (15) is supported at one end on the housing (2) and at the other end on the plunger (3, 4 ), and acts via the latter on the clamping member (7). An adjusting sleeve (14) is axially slidable relative to the clamping sleeve (6) by means of a fine thread (14a), and between the side of the abutment (9) facing away from the studs (11) and the adjusting sleeve (14) are disposed several cup springs (12). Rotational movement of the clamping sleeve (6) is limited relative to the housing (1) in the direction of opening by stop faces (19a, 20).
    • 一种具有机械伺服机构的夹紧装置,其具有可轴向移动的柱塞(3)和夹紧套筒(6),所述夹紧套筒围绕所述伺服机构并且由固定壳体的内螺纹(2a)中的外螺纹(6a) 2)。 其一端支撑在柱塞(3)上的夹紧构件(7)可轴向滑动并且不可旋转地连接到夹紧套筒(6)。 此外,连接到操作杆(10)的支座(9)在夹紧套筒(6)中可旋转到有限的程度。 在夹紧构件(7)和基台(9)之间设置有多个螺柱(11)。 外螺纹(6a)直接设置在夹紧套筒(6)的外圆周上,与夹紧件(7)和螺栓(11)的区域同心地设置。 压缩弹簧(15)一端支撑在壳体(2)上,另一端支撑在柱塞(3,4)上,并且通过该弹簧(15)在夹紧构件(7)上作用。 调节套筒(14)通过细螺纹(14a)相对于夹紧套筒(6)可轴向地滑动,并且在抵靠件(9)的背离螺柱(11)和调节套筒( 14)设置几个杯形弹簧(12)。 夹紧套筒(6)的旋转运动通过止动面(19a,20)在打开方向上相对于壳体(1)受到限制。