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. 10, 2012
Filed:
Aug. 15, 2008
David J. Mitchell, Oviedo, FL (US);
Anand A. Kulkarni, Oviedo, FL (US);
Ramesh Subramanian, Oviedo, FL (US);
Edward R. Roesch, Orlando, FL (US);
Rod Waits, Sunnyvale, CA (US);
Roberto Schupbach, Fayetteville, AR (US);
John R. Fraley, Fayetteville, AR (US);
Alexander B. Lostetter, Fayetteville, AR (US);
Brice Mcpherson, Fayetteville, AR (US);
Bryon Western, West Fork, AR (US);
David J. Mitchell, Oviedo, FL (US);
Anand A. Kulkarni, Oviedo, FL (US);
Ramesh Subramanian, Oviedo, FL (US);
Edward R. Roesch, Orlando, FL (US);
Rod Waits, Sunnyvale, CA (US);
Roberto Schupbach, Fayetteville, AR (US);
John R. Fraley, Fayetteville, AR (US);
Alexander B. Lostetter, Fayetteville, AR (US);
Brice McPherson, Fayetteville, AR (US);
Bryon Western, West Fork, AR (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
A circuit affixed to a moving part of an engine for sensing and processing the temperature of the part. The circuit generates a signal representative of the temperature sensed by a thermocouple () and amplified by an amplifier (). A square wave oscillator () with a temperature sensitive capacitor (C) varies its frequency in response to changes of a local temperature of the circuit. A chopper (J) converts the output of the amplifier into an alternating current signal. The chopper is gated by the square wave oscillator and a second input is coupled to an output of the amplifier. Thus, the chopper has an output signal having a frequency representative of the local temperature and an amplitude representative of the thermocouple temperature, whereby the combined signals represent the true temperature of the part.