公开(公告)号：US20120278033A1

公开(公告)日：2012-11-01

申请号：US13512758

申请日：2010-12-03

申请人： Johann Bücher ,  Siegfried Held

发明人： Johann Bücher ,  Siegfried Held

IPC分类号： G01D5/241 ,  G06F19/00

CPC分类号： G01D5/2415

摘要： Method for the determination of the position angle of a capacitive motion encoder (1) for sensing the position of a rotor (6) relative to a stator (2, 37) comprising an eccentric rotor disk (6, 7) relatively movable to a stationary stator (2, 37) with four electrical isolated field transmitters (4a, 4b, 4c, 4d; 38a-d) which generate an electrostatic field in a receiver area (5) which is modulated by a change in capacitance between the stator (2, 37) and rotor disk (6, 7) response to relative motion of the elements; and a processing circuitry (49) coupled to sense the modulated electrostatical field and determine responsive thereto a measure of the position of a moving object, characterized in that within one cyclic measurement time (10) at least 8 measurements (11 through 18) are carried out defining at least 8 different capacitance values (C1, C2, C3, C4, C4′, C3′, C2′, C1′) where the first capacitor C1 is measured in the 1st and 8th cycle, the second capacitor C2 is measured in the 2nd and 7th cycle, the third capacitor C3 is measured in the 3rd and 6th cycle, and the fourth capacitor C4 is measured in the 4th and 5th cycle.

摘要翻译： 用于确定用于感测转子（6）相对于定子（2,37）的位置的电容运动编码器（1）的位置角的方法，所述定子包括可相对于静止的可移动的偏心转子盘（6,7） 具有四个电隔离场发射器（4a，4b，4c，4d; 38a-d）的定子（2,37），其在接收器区域（5）中产生静电场，其由定子（2） ，37）和转子盘（6,7）响应元件的相对运动; 以及耦合以感测调制的静电场并且响应于此的移动物体的位置的测量的处理电路（49），其特征在于，在一个循环测量时间（10）内携带至少8个测量（11至18） 在第一和第八周期中测量第一电容器C1的至少8个不同的电容值（C1，C2，C3，C4，C4'，C3'，C2'，C1'），第二电容器C2在 在第二和第七周期中，在第三和第六周期中测量第三电容器C3，并且在第四和第五周期中测量第四电容器C4。