EP 1877740 A2 20080116 - METHOD AND SYSTEM FOR DIAGNOSING MECHANICAL, ELECTROMECHANICAL AND FLUID COMPONENTS
Title (en)
METHOD AND SYSTEM FOR DIAGNOSING MECHANICAL, ELECTROMECHANICAL AND FLUID COMPONENTS
Title (de)
VERFAHREN UND SYSTEM ZUR DIAGNOSE VON MECHANISCHEN, ELEKTROMECHANISCHEN ODER FLUIDISCHEN KOMPONENTEN
Title (fr)
PROCEDE ET DISPOSITIF POUR DIAGNOSTIQUER DES COMPOSANTES MECANIQUES, ELECTROMECANIQUES OU FLUIDIQUES
Publication
Application
Priority
- EP 2006061985 W 20060502
- DE 102005020901 A 20050504
Abstract (en)
[origin: WO2006117376A2] The invention relates to a diagnosis method and system comprising a structure-born noise sensor (1) which transmits, in a bandpass filtered manner, a measuring signal (3) based on the mechanical resonance frequency and capacity (CO) thereof and on an inductance (LI) and an evaluating device (4) in which the frequency, at which the measuring signal (3) level exceeds a predetermined threshold value, is defined and which is used for producing an error signal (9), 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 can be integrated into existing devices, in particular into process instrumentation field devices for which a restricted quantity of operating power is available. Said invention is advantageously used for identifying a valve leakage with the aid of an electro-pneumatic positional regulator.
IPC 8 full level
G01H 1/00 (2006.01)
CPC (source: EP US)
G01H 1/00 (2013.01 - EP US)
Citation (search report)
See references of WO 2006117376A2
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 2006117376 A2 20061109; WO 2006117376 A3 20070531; DE 102005020901 A1 20061116; EP 1877740 A2 20080116; US 2009090186 A1 20090409; US 7757556 B2 20100720
DOCDB simple family (application)
EP 2006061985 W 20060502; DE 102005020901 A 20050504; EP 06754961 A 20060502; US 91985706 A 20060502