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:
Feb. 15, 2011
Filed:
Sep. 01, 2006
Witold Lojkowski, Warsaw, PL;
Donats Millers, Riga, LV;
Janusz Fidelus, Mucharz, PL;
Larisa Grigorieva, Riga, LV;
Agnieszka Opalinska, Zyraτdow, PL;
Urszula Narkiewicz, Szczecin, PL;
Wieslaw Strek, Wroclaw, PL;
Witold Lojkowski, Warsaw, PL;
Donats Millers, Riga, LV;
Janusz Fidelus, Mucharz, PL;
Larisa Grigorieva, Riga, LV;
Agnieszka Opalinska, Zyraτdow, PL;
Urszula Narkiewicz, Szczecin, PL;
Wieslaw Strek, Wroclaw, PL;
Instytut Wysokich Cisnien Polskiej Akademii Nauk, Warsaw, PL;
Abstract
A method of measuring oxygen partial pressure in gases, such as hot engine exhaust gases, uses a calibrated luminescence sensor and comprises the steps of bringing nanocrystalline zirconium dioxide ZrO2 () in said sensor into contact with a gas to be measured, illuminating the zirconium dioxide with a UV-VIS light pulse emitted from a light source () and adapted to induce luminescence of the zirconium dioxide, registering the time dependence of the luminescence intensity of the ZrO2 using a photodetector () and a recorder (), determining a particular intensity, e.g., the maximum intensity of the registered luminescence pulse, and comparing said determined intensity with calibration data of the luminescence intensity as a function of oxygen partial pressure for the sensor temperature at the time of the measurement.