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:
Sep. 06, 2011
Filed:
Mar. 27, 2007
Marc Von Waldkirch, Zollikon, CH;
Mark Hornung, Männedorf, DE;
Felix Mayer, Stäfa, CH;
Moritz Lechner, Stäfa, CH;
Marc von Waldkirch, Zollikon, CH;
Mark Hornung, Männedorf, DE;
Felix Mayer, Stäfa, CH;
Moritz Lechner, Stäfa, CH;
Sensirion AG, Stäfa, CH;
Abstract
The flow sensor comprises a heater arranged between two sensing thermopiles. In addition, at least one monitoring thermocouple is provided for measuring the temperature of the heater. The signal from the monitoring thermocouple can be used to improve the accuracy of the device in several ways. In particular, the signal from the monitoring thermocouple depends on changes of the Seeback constant and other inherent properties of the thermopiles in the same way as the signal from the sensing thermopiles, which allows a compensation of such effects. The signal from the monitoring thermocouple can also be used as a reference voltage to an A/D converter for converting the signals from the sensing thermopiles.