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    • 1. 发明申请
    • A DEVICE AND METHOD FOR CAPACITIVE LINEAR DISPLACEMENT MEASUREMENT
    • 用于电容线性位移测量的装置和方法
    • WO2011018497A1
    • 2011-02-17
    • PCT/EP2010/061749
    • 2010-08-12
    • SIEMENS AKTIENGESELLSCHAFTYANG, Yi RongDU, Zhao HuiLIN, Yan Ling
    • YANG, Yi RongDU, Zhao HuiLIN, Yan Ling
    • G01D5/249
    • G01D5/2497
    • The present invention provides a device and process for capacitive linear displacement measurement, wherein the strip electrodes are arranged on the base in a line equidistantly, and every N continuous strip electrodes compose a spatial period, and a first group of signal lines is composed by N signal lines, wherein N is an integer greater than or equal to 2; in the absolute displacement measurement mode, the N signal lines in said first group of signal lines take turns in being loaded with excitation signals in one signal generation period; the connection between each strip electrode and the first group of signal lines causes all the excitation signal combinations detected at all displacement positions by the reading unit in the absolute displacement measurement mode to be different from one another; the reading unit moves along the strip electrodes, outputting the signal combinations detected at the strip electrodes which it covers, and providing the absolute displacement value corresponding to the signal combination to the displacement determining unit. The present invention enables simpler absolute displacement measurement at a low cost and delivers strong resistance to interference.
    • 本发明提供一种用于电容线性位移测量的装置和方法,其中条形电极以等距离的方式布置在基座上,每N条连续条形电极构成空间周期,第一组信号线由N 信号线,其中N是大于或等于2的整数; 在绝对位移测量模式中,所述第一组信号线中的N条信号线在一个信号产生周期中被加载激励信号; 每个条形电极和第一组信号线之间的连接使得在绝对位移测量模式中由读取单元在所有位移位置处检测到的所有激励信号组合彼此不同; 读取单元沿着带状电极移动,输出在其所覆盖的条形电极处检测到的信号组合,并将与信号组合对应的绝对位移值提供给位移确定单元。 本发明能够以较低的成本实现更简单的绝对位移测量并提供强的抗干扰性。