公开(公告)号：WO2014114669A2

公开(公告)日：2014-07-31

申请号：PCT/EP2014051239

申请日：2014-01-22

Applicant: BROSE FAHRZEUGTEILE

Inventor： POHL FLORIAN ,  BRAND CHRISTOPH ,  WÜRSTLEIN HOLGER

CPC classification number: G01B7/023 ,  G01D5/2405 ,  G01R27/26 ,  H03K17/955 ,  H03K2217/960775

Abstract: During operation of a capacitive proximity sensor (1) that is provided with at least two measuring electrodes (2, 3), a first capacitance measurement variable (K1) and a second capacitance measurement variable (K2) are detected, wherein the first capacitance measurement variable (K1) is correlated with the capacitance of at least one of the measuring electrodes (2) to earth (M), while the second capacitance measurement variable (K2) is correlated with the capacitance between at least one of the measuring electrodes (2) and at least one further measuring electrode (3). A change in the first capacitance measurement variable (K1) is evaluated together with a synchronous signal profile of the second capacitance measurement variable (K2) in order to distinguish a proximity of a conductor coupled electrically to earth from the proximity of dielectric matter. In this manner, a body part passing into the detection space (11) of the proximity sensor (1) can be distinguished effectively from other substances and objects, particularly water.

Abstract translation: 在操作的一个具有至少两个测量电极（2,3）的电容式接近传感器（1），检测第一测量的电容值（K1）和第二测量的电容值（K2），设置在所述第一测得的电容值（K1）与所述测量电极中的至少一个的容量（2 ）相对于质量（M）是相关的，而第二测量电容值（K2）是在测量电极中的至少一个之间相关的电容（2）和至少一个另外的测量电极（3）。 所述第一电容的测量数量（K1）的变化在此情况下连同所述第二测量的电容值（K2）中的同步信号，以便区分一个电耦合到电介质物质的方法的接地导体的方法进行评价。 以这种方式，穿透接近传感器（1）的检测空间（11）的身体部分可以有效地与其他物质和物体（特别是水）区分开。