System and method for non-invasive diagnostic testing of control valves
US6745107B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jul 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B23/0232
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for detecting malfunctions in control valves is disclosed. The system comprises a test unit that is capable of being coupled to a feedback controller that is coupled to a control valve. From the feedback controller the test unit obtains process variable data and output data associated with the control valve. A test unit controller in the test unit 1) forms a data pattern from the process variable data and output data associated with the control valve, and 2) compares the data pattern with a diagnostic data pattern of a valve malfunction or valve fault. When the data pattern matches the diagnostic data pattern of the valve fault, the test unit controller determines that the control valve is experiencing a valve fault. The system and method of the present invention does not require the control valve to be taken out of operation during the diagnostic testing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.