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:
Jul. 20, 2010
Filed:
May. 02, 2006
Edmund Linzenkirchner, Eggenstein-Leopoldshafen, DE;
Alf Püttmer, Karlsruhe, DE;
Edmund Linzenkirchner, Eggenstein-Leopoldshafen, DE;
Alf Püttmer, Karlsruhe, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
There is described a diagnosis method and a system including a structure-born noise sensor which transmits, in a bandpass filtered manner, a measuring signal based on the mechanical resonance frequency and capacity thereof and on an inductance and an evaluating device in which the frequency, at which the measuring signal level exceeds a predetermined threshold value, is defined and which is used for producing an error signal, when the frequency exceeds a second predetermined threshold value. As far as the diagnosis performance requires a small number of electronic components and a low power supply, the diagnostic is integrated into existing devices, in particular into process instrumentation field devices for which a restricted quantity of operating power is available. The method and the system are used for identifying a valve leakage with the aid of an electro-pneumatic positional regulator.