Patent ID: 6483295
Filing Date: 2002-11-19
Classification: G01D

Abstract:
Inductive linear position sensor comprising an oscillator circuit which creates a periodic alternating voltage signal and which is coupled to an exciting coil, a plurality of receiving coils with the exciting and the receiving coils being structured as conductors on a circuit board, an evaluation circuit to evaluate signals induced in the receiving coils operatively coupled to taps of the receiving coils, and a movable induction coupling element which influences a strength of inductive coupling between the exciting coil and the receiving coils;wherein the evaluation circuitry is arranged within the geometry of at least one of the exciting and receiving coils and wherein the effective surface area of the receiving coils at beginning and end areas of the linear position sensor are structured in such a way that when the movable element is not present, a zero voltage results at the taps of the receiving coils.