Device in a process system for determining statistical parameter
US6539267B1 · kind B1 · utility
104Cited by
213References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | May 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B23/0278
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A process device couples to a process control loop. The process device receives process signals. A memory in the process device contains a nominal parameter value and a rule. Computing circuitry calculates a statistical parameter of the process signal and operates on the statistical parameter and the stored nominal value based upon the stored rule and responsively provides an event output based upon the operation. Output circuitry provides an output in response to the event output. The statistical parameter can be used in statistical process control systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.