Showing papers by "Michael Bauer published in 2002"

Sensor module having a sensor element surrounded by a heating element

Abstract: A sensor module having a heating structure and a sensor element is described. The heating structure surrounds the sensor element so that heat dissipation through a frame is largely prevented. This yields a greater measuring accuracy of the sensor module. In particular, interfering influences due to a temperature dissipation through the mount frame are thereby prevented.

Verfahren und Vorrichtung zur Detektion eines Geruches

Abstract: Es wird ein Verfahren zur Detektion eines Geruches eines Stoffgemisches mit mindestens einer geruchsaktiven Komponente vorgeschlagen, wobei eine der Komponenten des Stoffgemisches als Leitsubstanz ausgewahlt, die Konzentration der Leitsubstanz mittels eines fur die Leitsubstanz spezifischen Sensors (4) ermittelt und ein Schaltelement (2) in Abhangigkeit von der Konzentration der Leitsubstanz betatigt wird (Figur 3).

Sensorbaustein mit einem sensorelement, das von einem heizelement umgeben ist

Abstract: Es wird ein Sensorbaustein (1) beschrieben, der eine Heizstruktur (4) und ein Sensorelement (10) aufweist. Die Heizstruktur (4) umgibt das Sensorelement (10), so dass das Sensorelement weitgehend von einem Warmeabfluss uber einen Rahmen (2) entkoppelt ist. Damit wird eine grossere Messgenauigkeit des Sensorbausteins erreicht. Insbesondere werden storende Einflusse durch einen Temperaturabfluss uber den Halterahmen vermieden.

Semiconductor gas sensor having a circular arrangement of interdigital electrodes and heating structures, and method for the producing the sensor during which the sensitive semiconductor layer is applied in the form of drops

Abstract: The invention relates to a gas sensor comprising a membrane (18), a heating structure (10) that is arranged on the membrane (18), an evaluating structure (12) that is arranged on the membrane (18), and a sensitive layer (14) that is also arranged on the membrane (18). Said layer can be heated by the heating structure (10) and its electrical resistance can be evaluated by the evaluating structure (12). The sensitive layer (14) is applied in the form of drops (16), and the remaining structures (10, 12) are at least partially adapted to the shape of the sensitive layer (14). The invention also relates to a method for producing a gas sensor.

Method and apparatus for smell detection

Abstract: To detect an odor from a mixture of substances, at least one component is selected as a guide, and a sensor (4) is structured to be sensitive to this specific substance and register its concentration. A switch (2) is operated by a control unit (5) according to the level of registered concentration, e.g. as a vehicle ventilation flap for the interior (3) of a vehicle (1). The guide substance from a skunk is 3-methyl-1-butandiol; from liquid manure it is propionic acid, acetaldehyde, dimethylamine or butyric acid. The sensor is a semiconductor gas sensor with a sensitive metal oxide layer e.g. tin oxide, tungsten oxide or titanium dioxide, dosed with a noble metal e.g. silver, gold, platinum and/or palladium.

Sensor module with a sensor element surrounded by a heating element

Abstract: A sensor module (1) is disclosed, comprising a heating structure (4) and a sensor element (10). The heating structure (4) surrounds the sensor element (10), such that the sensor element is essentially decoupled from a heat flux from a frame (2). A greater measuring sensitivity for the sensor module is thus achieved. In particular, disturbances due to a temperature influence of the mounting frame are avoided.