SENSOR SYSTEM AND METHOD FOR THE CAPACITIVE DETECTION OF OBSTACLES,申请号WO2015EP68370-传众专利搜索

SENSOR SYSTEM AND METHOD FOR THE CAPACITIVE DETECTION OF OBSTACLES

申请公布号：WO2016023863(A1)

申请号：WO2015EP68370

申请日期：2015.08.10

申请公布日期：2016.02.18

申请人：

MAYSER GMBH & CO. KG

发明人：WIEST, THOMAS;SCHEIBLE, MARTIN;REIME, GERD;KELSCH, MANUEL;CZEMPAS, DOMINIC

分类号：H03K17/955

主分类号：H03K17/955

摘要：The invention relates to a sensor system for the capacitive detection of obstacles, comprising a capacitive sensor having at least two conductive elements (14, 16) and a control circuit (18, 20) which is joined to the at least two conductive elements and which has a bridge circuit (24), wherein a first end (P1) of the bridge branch is connected to a conductive element (14) of the sensor that is downstream in the direction of detection, and a second end (P2) is connected to an upstream conductor (16) of the switching strip profile (10), wherein, by means of a control section (18) of the control circuit, a control signal is generated and fed into both conductive elements, and the total of the impedances (Z2, Z3) of the bridge circuit connected to the first end of the bridge branch is smaller than the total of the impedances (Z4, Z5) of the bridge circuit connected to the second end of the bridge branch, wherein an electronic evaluation device (20) is provided for evaluating a voltage difference between the first and the second end of the bridge branch.