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:
Jun. 30, 2009
Filed:
Jun. 11, 2007
Norman W. Schubring, Troy, MI (US);
Michael W. Putty, Grosse Pointe Woods, MI (US);
Joseph V. Mantese, Manchester, CT (US);
Adolph L. Micheli, Harrison Township, MI (US);
Norman W. Schubring, Troy, MI (US);
Michael W. Putty, Grosse Pointe Woods, MI (US);
Joseph V. Mantese, Manchester, CT (US);
Adolph L. Micheli, Harrison Township, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
Systems and methods for determining a temperature of a ferroelectric sensor are provided. The ferroelectric sensor has operational characteristics defined by a polarization versus voltage hysteresis loop. In one exemplary embodiment, the method includes applying a symmetrical periodic voltage waveform to the ferroelectric sensor so as to induce the ferroelectric sensor to traverse the polarization versus voltage hysteresis loop. The method further includes monitoring voltages across the ferroelectric sensor and polarization states of the ferroelectric sensor over a first time interval to determine a first zero field polarization state and a first coercive field voltage. The method further includes determining a first temperature value indicative of the temperature of the ferroelectric sensor based on the first coercive field voltage.