Method and device for detecting the location of a pulse-type mechanical effect on a system part

US7542860B2 · kind B2 · utility

Assignee

• AREVA NP · FR

Inventors

• Bela Bechtold · Steinfeld (Oldenburg), DE
• Peter Jax · Hannover, DE
• Vojtech Ocelik · Erlangen, DE
• Jan Zach · Erlangen, DE

Key dates

• Filing date: Jul 18, 2008
• Grant date: Jun 2, 2009
• Expiry date: Jul 18, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M13/028
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and device detect a position of a pulsed mechanical effect on a plant component. An operating noise in the plant component is continuously recorded by sensors which are arranged on the plant component and converted by the above into a measured signal. The measured signals of the sensors undergo a transformation in a first time window. A first evaluation function is derived from a plurality of first transformations determined in this manner, the evaluation functions display an appearance of the pulsed mechanical effect. Accordingly, when detecting an effect following the second shorter time window having the same algorithms, second transformed and respectively, second evaluation functions are derived, from which, respectively, one time point is determined. Wherein the sound signal produced by the effect impacts upon the sensor. From there, running time differences produced between the sensors can be exactly reconstructed on the position of the effect.