Inductive proximity sensor and method for signal recovery in the case of an inductive proximity sensor

摘要

An inductive proximity sensor, comprising a metallic article which can be influenced by the approach of an oscillating circuit (10; 66) and an evaluation unit (80) for generating a sensor signal, wherein the resonant circuit (10; 66) a coils branch (28) with a sensor coil (12; 92) and a reference coil (14; 94) which are connected in series, and a resistor elements branch (26) with resistance elements (20, 22; 54, 56), that the sensor coil (12; 92) and the reference coil (14; 94) with resistance elements (20, 22; 54, 56) in an l - r - bridge circuit (24) are arranged and that a voltage detector (30; 32) in each case in the coils branch (28) and in the resistor elements branch (26) of the l - r - bridge circuit (24) is provided.