Flow measuring system having transducer temperatures that deviate from measuring point temperatures

US11573111B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Alfred Rieder · Landshut, DE
• Gerhard Eckert · Weil am Rhein, DE
• Ennio Bitto · Aesch, CH
• Hao Zhu · Freising, DE

Key dates

• Filing date: Jun 26, 2017
• Grant date: Feb 7, 2023
• Expiry date: Apr 8, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N11/16
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The measuring system includes a transducer apparatus with two tubes. Each tube is adapted to be flowed through by a fluid from an inlet end toward an outlet end and to be caused to vibrate. An electromechanical exciter mechanism excites and maintains mechanical oscillations of each of the tubes, and a sensor arrangement registers mechanical oscillations of at least one of the tubes. The transducer apparatus includes two temperature sensors each being mechanically and thermally conductively coupled with a wall of the tube, wherein each of the temperature sensors registers a measuring point temperature, and converts such into a temperature measurement signal temperature. A measuring and operating electronics (ME) generates a transducer temperature measured value representing a transducer apparatus temperature so that a magnitude of the transducer temperature measured value is greater than a magnitude of the measuring point temperature and less than a magnitude of the measuring point temperature.