Patent ID: 6904378
Filing Date: 2005-06-07
Classification: G05D

Abstract:
1. A method for measuring the temperature of a ferromagnetic saucepan for detecting and controlling the temperature of the saucepan, said ferromagnetic saucepan being located near a heater, said heater, said heater having a suport made from ferromagnetic metal, wherein an inductive sensor and a control means with evaluation electronics are provided for controlling said heater and the temperature of said saucepan, said inductive sensor and said ferromagnetic saucepan forming part of a resonant circuit, the method comprising the steps of: determining a parameter of said resonant circuit is on said inductive sensor as a measured temperature value in time behavior with a curve, establishing from a characteristic segment of said curve the temperature of said saucepan; using the absolute value of said measured temperature value at a specific point of said characteristic segment as a desired value for control purposes; measuring the temperature of said support and using the temperature for forming a correction value; and correcting said resonant circuit parameter using said correction value.