Method for function monitoring of a sensor

US7957928B2 · kind B2 · utility

Assignee

• Endress+Hauser Conducta Gesellschaft fuer Mess- und Regeltechnik mbH + Co. KG · DE

Inventors

• Axel Tischendorf · Leonberg, DE
• Hermann Straub · Winterthur, CH
• Torsten Pechstein · Radebeul, DE

Key dates

• Filing date: Nov 29, 2005
• Grant date: Jun 7, 2011
• Expiry date: Dec 24, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D3/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for monitoring a sensor function by repeatedly acquiring data records including sensor-specific calibration data; by storing the acquired data records; by analyzing changes of the calibration data over time using the stored data records; and by determining time or time weighted with a load factor until the next calibration is due, using at least the changes of the calibration data over time. The resulting time or the determined time weighted with a load factor can, for example, be output in suitable form directly after determination, thereby allowing for a long-term planning of calibration, and/or it can be stored as a date or a remaining time. A comparison with a time signal or a count-down of the remaining time allows at the due date to output a request, or prompt, signal, optionally with a desired lead time.