Beurer Gmbh

Thomas Wildermuth

Ralf Köhler

Ernst Merk

A pliable heating device having a flexible electrical heating apparatus, which is operated by a control device and which has at least one flexible heating element that is connected to a flexible support and that has a heating conductor, which is situated in a heating circuit, and a flexible sensor conductor, which is separated from the heating conductor by an intermediate insulation, having a dampable oscillator, which is contained in the control device and is connected to the sensor conductor and whose output signal can be varied as a function of various functional states of the heating apparatus, which functional states are detected by the sensor conductor, and having an evaluation device by which fault states can be detected from the output signal. In order to reliably detect function states, in particular fault states, the sensor conductor is connected at one end to the heating conductor via a resistor device which is connected in series to it and is of at least an ohmic, a capacitive, and/or an inductive sensor resistor, and is connected at the other end to the oscillator via an ohmic current-limiting resistor.

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Ulm, Germany

Thomas Wildermuth