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:
Jan. 01, 2013
Filed:
Jan. 11, 2010
Axel Kramer, Wettingen, CH;
Frank Kassubek, Rheinfelden, DE;
Klaus Bohnert, Oberrohrdorf, CH;
Hubert Braendle, Oberengstringen, CH;
Axel Kramer, Wettingen, CH;
Frank Kassubek, Rheinfelden, DE;
Klaus Bohnert, Oberrohrdorf, CH;
Hubert Braendle, Oberengstringen, CH;
ABB Research Ltd, Zurich, CH;
Abstract
A pressure sensor is disclosed with at least one pressure sensing element, the pressure induced changes in the optical properties of which are evaluated by illumination with at least one light source. The pressure sensor can include at least two semiconductor-based pressure sensing elements located in individual pressure chambers, which sensing elements are located essentially adjacent to each other. The sensing elements can be irradiated with the same light source, wherein the light transmitted through the sensing elements is detected using at least two corresponding detectors, and wherein the differential pressure in the two pressure chambers is evaluated based on the output of these detectors.