High Precision Vibration-Type Densitometers Based on Pulsed Excitation Measurements

Sensors

Andreas Rechberger¹  Robert Amsüss¹  Robert Breidler¹  Stefan Rossegger¹  Gerald Steiner¹ 

[1] Anton Paar GmbH, 8054 Graz, Austria;

关键词: flexural resonator;    pulsed excitation;    repeated fade-out;    density measurement;    fluids;    viscosity correction;   

DOI  :  10.3390/s19071627

来源: DOAJ

【 摘 要 】

Glass flexural resonators have established themselves as one of the de-facto standard methods for measuring the density of liquids in a laboratory environment. The core of this sensor is a U-Tube measuring cell whose oscillator’s resonance frequency changes with the mass of the liquid within the tube. This relationship can be used to derive the density of liquids in a fast and reliable way. In order to achieve the highest accuracy for the density measurement multiple physical effects (e.g., damping due to viscosity effects) need to be taken into account. For a reliable correction, additional measurements are required. The pulsed excitation method is able to produce these additional parameters along with a superior measurement performance compared to previous techniques.

【 授权许可】

Unknown