The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2007
Filed:
Apr. 12, 2005
Peter Krippner, Karlsruhe, DE;
Wolfgang Scholz, Minden, DE;
Peter Riegler, Göttingen, DE;
Emrullah Altiok, Minden, DE;
Jürgen Biskup, Minden, DE;
Wilhelm Daake, Petershagen, DE;
Raiko Milanovic, Biethsstr, DE;
Rolf Merte, Heidelberg, DE;
Armin Gasch, Speyer, DE;
Fabrizio Lorito, Mailand, IT;
Andrea Moroni, Gorla Minora, IT;
Franco Vecchiato, Lipomoco, IT;
Corrado Bianchi, Lenno, IT;
Eugenio Volonterio, Oltrona San Mamette, IT;
Peter Krippner, Karlsruhe, DE;
Wolfgang Scholz, Minden, DE;
Peter Riegler, Göttingen, DE;
Emrullah Altiok, Minden, DE;
Jürgen Biskup, Minden, DE;
Wilhelm Daake, Petershagen, DE;
Raiko Milanovic, Biethsstr, DE;
Rolf Merte, Heidelberg, DE;
Armin Gasch, Speyer, DE;
Fabrizio Lorito, Mailand, IT;
Andrea Moroni, Gorla Minora, IT;
Franco Vecchiato, Lipomoco, IT;
Corrado Bianchi, Lenno, IT;
Eugenio Volonterio, Oltrona San Mamette, IT;
ABB Research Ltd, Zurich, CH;
Abstract
The invention relates to a device and a method for the status monitoring of a pressure measuring unit in an absolute or differential or relative pressure transducer, a pressure-sensitive element installed in the pressure measuring unit being impinged with at least one pressure generated by at least one membrane. During a defined diagnosis time interval, a testing element integrated in the pressure measuring unit is induced to undergo a change in volume, preferably by electrical activation. The pressure difference caused as a result in the pressure measuring unit is registered by a pressure-sensitive element. The curve registered during a diagnosis time interval is compared with a reference curve recorded with the pressure measuring unit intact. A fault indication is given if the deviations between the registered curve and the reference curve exceed predetermined tolerance values.