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Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids
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Embedded Doppler system for industrial in-line rheometry.

Stefano Ricci1, Maxime Liard, Beat Birkhofer

  • 1Department of Electronics and Telecommunications, Universita degli Studi di Firenze, Firenze, Italy. stefano.ricci@unifi.it

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|July 26, 2012
PubMed
Summary

This study introduces an embedded system for real-time rheological evaluation of adhesives. The system enables accurate in-line measurement of fluid behavior indices, improving industrial quality control.

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Area of Science:

  • Materials Science
  • Fluid Dynamics
  • Embedded Systems Engineering

Background:

  • Rheological characterization is vital for industrial processes like cosmetics, food, and adhesives manufacturing.
  • Current rheological measurements are often confined to laboratory settings due to technical challenges.
  • Quality control in production chains relies on accurate rheological data.

Purpose of the Study:

  • To present an embedded system for in-line rheometric evaluation of highly filled polyurethane-based adhesives.
  • To overcome the limitations of traditional laboratory-based rheological measurements.
  • To enable real-time monitoring of fluid behavior during industrial production.

Main Methods:

  • Development of an embedded system integrating an ultrasound front-end and digital signal processing on a low-cost FPGA.
  • Utilizing a Doppler multigate technique to measure the real-time fluid velocity profile within a pipe.
  • Combining high-resolution velocity profile data with pressure drop measurements.

Main Results:

  • The system accurately measures the real-time velocity profile of highly filled adhesives.
  • Accurate determination of the flow consistency index (K) and flow behavior index (n) is achieved.
  • The embedded system provides a viable solution for in-line rheometric evaluation.

Conclusions:

  • The developed embedded system offers a practical and accurate method for in-line rheological characterization of adhesives.
  • This technology enhances real-time quality control in industrial manufacturing processes.
  • The system's low-cost FPGA integration makes advanced rheometric evaluation more accessible.