Detecting proximity of electrically conducting objects involves feeding signal into resonant circuit to change resonant frequency, detecting resonant state, analyzing signal using detected state

摘要

The method involves using an inductive sensor (1) in a resonant circuit (10) by feeding a first periodic signal into the resonant circuit, changing the resonant frequency of the circuit by feeding a second signal into the circuit, detecting a resonant state in the circuit and analyzing the second signal using the detected resonant state. An independent claim is also included for the following: a cooker point with glass ceramic with an inductive sensor for detecting pots.