Method for calibration or adjustment of any oscillatable unit

US10078005B2 · kind B2 · utility

Assignee

• ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

• Tobias Brengartner · Emmendingen, DE
• Gerd Bechtel · Steinen, DE
• Sascha D'Angelico · Tuttlingen, DE

Key dates

• Filing date: May 19, 2014
• Grant date: Sep 18, 2018
• Expiry date: Oct 29, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N9/002
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for calibration or adjustment of any oscillatable unit with a mathematical model describing the oscillatable unit, wherein the oscillatable unit interacts with a medium located in a container, comprising the steps as follows: exciting the oscillatable unit via a real input signal to execute oscillations; the real output signal of the oscillatable unit is ascertained; the real output signal is digitized and a real output sequence is produced; the real input signal is digitized and a digital input sequence is produced; the digital input sequence is fed to a function block, which provides the mathematical model of the oscillatable unit in interaction with the medium. The mathematical model is defined by at least two sensor-specific variables; a virtual output sequence is produced via the mathematical model. The virtual output sequence is compared with the real output sequence; in the case of a deviation, the sensor-specific variables of the mathematical model are adaptively changed, until the deviation between the virtual output sequence and the real output sequence of the oscillatable unit lies within a predetermined tolerance range.