Abstract
This paper provides an overview into recent developments in self-validating sensors. This concept assumes the availability of internal computing power for self-diagnostics, and of digital communications to convey measurement and diagnostic data. A generic set of metrics are proposed for describing measurement quality, including online uncertainty. A SEVA instrument, based on the Coriolis mass flow meter is described; its ability to detect and compensate for the effects of two-phase flow has been implemented in a commercial meter. SEVA has been incorporated into a British Standard, which is currently being extended. Other related standardisation efforts include work by the European user organisations WIB and NAMUR, who are collaborating on an initiative to develop a common framework for describing sensor diagnostics on-line. Comparison with the SEVA Coriolis meter show some of the limitations of the WIB approach. Recent theoretical developments in SEVA include a simple technique for combining the outputs of redundant SEVA sensors for consistency checking and the calculation of a combined best estimate.
| Original language | English |
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| Title of host publication | 10th IMEKO TC7 Symposium on Advances of Measurement Science 2004 |
| Publisher | Curran Associates inc. |
| Pages | 435-440 |
| Number of pages | 6 |
| ISBN (Print) | 978-1-63439-188-7 |
| Publication status | Published - 2004 |
| Externally published | Yes |
| Event | IMEKO TC7 Symposium on Advances of Measurement Science 2004 - St. Petersburg, Russian Federation Duration: 30 Jun 2004 → 2 Jul 2004 Conference number: 10 |
Conference
| Conference | IMEKO TC7 Symposium on Advances of Measurement Science 2004 |
|---|---|
| Country | Russian Federation |
| City | St. Petersburg |
| Period | 30/06/04 → 2/07/04 |