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:
May. 24, 2011
Filed:
Aug. 17, 2005
David E. Wiklund, Eden Prairie, MN (US);
Kadir Kavaklioglu, Istanbul, TR;
John P. Miller, Eden Prairie, MN (US);
Ross C. Lamothe, Eden Prairie, MN (US);
Evren Eryurek, Edina, MN (US);
David E. Wiklund, Eden Prairie, MN (US);
Kadir Kavaklioglu, Istanbul, TR;
John P. Miller, Eden Prairie, MN (US);
Ross C. Lamothe, Eden Prairie, MN (US);
Evren Eryurek, Edina, MN (US);
Rosemount, Inc., Eden Prairie, MN (US);
Abstract
A process variable transmitter with diagnostics based on power spectral density (PSD) analysis of a process variable sensor signal is provided. In one embodiment, the process variable transmitter is a pressure transmitter and the diagnostics are used to diagnose impulse line obstruction or impending obstruction. Other diagnostics are also useful such as diagnosing primary element degradation. The sensor signal is digitized and the digitized signal is transferred into the frequency domain. The power of the frequencies on the sensor signal is examined to provide the enhanced diagnostics. In one aspect diagnostics are generated directly with the sensor PSD data. In another aspect, the PSD analysis is used to tune a filter in order to enhance traditional diagnostic algorithms.