Verfahren zur Detektion und Charakterisierung von Blasen in Flüssigkeiten und Vorrichtung dafür, zugehöriges System

Details

Veröffentlichungs-Nr.

EP3005942

Aktenzeichen

EP14188200

Anmeldetag

8. Oktober 2014

Veröffentlichung

3. Dezember 2025

Erteilung

3. Dezember 2025

Rechtsraum

EP

IPC

A61B5/0537A61B8/08A61B5/145A61B5/1477

Abstract

The invention concerns an ultra-sensitive and accurate electrical impedance spectroscopy technique for the detection and characterization of bubbles in liquids that is required in numerous industrial processes as well as in the human's blood circulation during Decompression Sickness. The method is based on measuring non-invasively the electrical impedance variation of two-phase mixtures: liquid as conductive phase, resp. gas as non-conductive phase, applying an AC excitation signal of the proper frequency value identified by preliminary frequency scanning. The system takes advantage of innovative signal acquisition (hardware) device, and digital signal processing (software) methods and manages to detect accurately for the first time even the presence of a few bubbles corresponding to extremely low volumetric gas fraction values, up to < 0,1%. Also, the high measurement sensitivity of 0,001% in conjunction with advanced signal processing provides valuable qualitative and quantitative information on bubble size characteristics and allows for correlating bubble size to the spectral content of acquired signals.

Anmelder

Firma

ARISTOTLE UNIVERSITY OF THESSALONIKI- Research Committee

Land

🇬🇷 Griechenland

Fachgebiete