Diagnostic system and method, especially for a valve
US6637267B2 · kind B2 · utility
35Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Mar 29, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K37/0083
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a diagnostic system and method, especially for a valve (2) that can be actuated by a positioner (9) via a drive (6). The system utilizes a sensor (12) for recording structure-related sound and has a device (14) for evaluating a recorded measurement signal (13). A spectral region greater than 50 kHz is evaluated for conducting fault recognition. A fault indication signal is generated if the intensity of the measurement signal in this spectral region exceeds a defined threshold value. The sound caused by cavitation is primarily evaluated for conducting fault recognition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.