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:
Dec. 20, 2005
Filed:
Oct. 26, 2004
Wolfgang Ens, Linkenheim, DE;
Alf Puettmer, Karlsruhe, DE;
Wolfgang Ens, Linkenheim, DE;
Alf Puettmer, Karlsruhe, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A diagnostic system, for a valve (), having a sensor () that senses structure-borne noise and having a device () for evaluating a measurement signal () of the structure-borne noise. During a calibration process, a first progression of the measurement signal is sensed for the closed position of the valve () and a first value (w) of a characteristic is determined. To simulate leakage noise, the valve () is nearly closed during operation, a second progression of the measurement signal is sensed and a second value (w) is determined. If the deviation of the second value from the first value is sufficiently large, a diagnosis is possible. A third progression of the measurement signal is sensed for the closed position of the valve as in an installed condition, and a third value (w) is determined. If the deviation of the third value (w) from the first value (w) is too great, and if a diagnosis has been identified as being possible, then the system deduces that the valve leaks.