Method for measuring density of a fluid

US10466151B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Gerhard Eckert · Weil am Rhein, DE
• Alfred Rieder · Landshut, DE
• Hao Zhu · Freising, DE

Key dates

• Filing date: Nov 18, 2015
• Grant date: Nov 5, 2019
• Expiry date: Jun 8, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2009/006
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method is provided for measuring density of a fluid by means of at least one at least sectionally curved measuring tube. The measuring tube is adapted to be flowed through by the fluid and concurrently to be caused to vibrate over a wanted oscillatory length, namely a tube length measured from a first tube end to a second tube end, a length which is greater than a minimum separation of the second tube end from the first tube end. According to the invention, among other things, also a tilt measured value representing an inclination of the at least one measuring tube in the static resting position relative to a local acceleration of gravity is ascertained, in such a manner that such represents an angle of intersection between a direction vector of an imaginary first reference axis (y-axis) and a direction vector of an imaginary second reference axis (g-axis). The first reference axis is so selected that it is perpendicular to an imaginary third reference axis (z-axis) imaginarily connecting the first tube end and the second tube end and points in the direction of a peak of the at least one measuring tube farthest from the third reference axis in the static resting position, while t…