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:
Apr. 27, 2010
Filed:
May. 02, 2006
Alf Püttmer, Karlsruhe, DE;
Alf Püttmer, Karlsruhe, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
There is described a diagnosis method and system including a sensor for structure-borne noise which emits a measuring signal in a bandwidth-filtered manner due to its mechanical resonant frequency, capacitance and inductance. The system also includes an evaluation device in which the measuring signal is undersampled and which outputs an error signal should the undersampled measuring signal exceed a defined threshold value. The system requires only a small number of electronic components and only a little power supply capacity. The system thereby allows diagnosis to be carried out without complication in existing devices, especially in field devices of process instrumentation for which only a limited amount of operating power is available. The method and system are especially advantageous for the recognition of valve leakage with an electropneumatic position controller.