Patent ID: 9052178
Filing Date: 2015-06-09
Classification: G01B

Abstract:
1. A noncontact distance measuring sensor comprising: a coil arrangement including at least two measuring coils oriented along a common axis; an electrically and/or magnetically conducting measurement object which is in an electromagnetic interaction with the coil arrangement; an evaluation circuit for evaluating and ascertaining a position of the measurement object, the coil arrangement including a voltage tap which is coupled to the evaluation circuit and at which a signal can be detected that indicates a position of the measurement object, and the evaluation circuit being designed to convert the signal detected at the voltage tap to an output quantity that indicates the position of the measurement object in relation to an initial position of the measurement object; and an additional coil which is arranged on the common axis, is coupled to the evaluation circuit, and at least partly overlaps at least one of the two measuring coils to determine whether the signal detected at the voltage tap is valid or invalid.