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. 27, 2011
Filed:
Nov. 25, 2008
John E. Seem, Glendale, WI (US);
Yaoyu LI, Franklin, WI (US);
Timothy Salsbury, Whitefish Bay, WI (US);
John E. Seem, Glendale, WI (US);
Yaoyu Li, Franklin, WI (US);
Timothy Salsbury, Whitefish Bay, WI (US);
Johnson Controls Technology Company, Holland, MI (US);
Abstract
A fault detection system for detecting a fault in a process system includes a first circuit configured to modify an input of the process system with a modifying signal. The fault detection system further includes a second circuit configured to receive an output from the process system and configured to determine whether the fault exists based on at least one of a reduction of a signal component and an unexpected transformation of the signal component, wherein the signal component corresponds to a function of the modifying signal.