Resumo
An optical fiber sensor for monitoring dynamic systems of colloidal suspensions is reported. The system is comprised of a reflection-type quasi-elastic light scattering fiber probe that is placed on the assessed flow. The measurements were conducted for colloidal silica subjected to laminar flow condition, yielding 0.117 s/cm velocity sensitivity for 2.0 wt%. Furthermore, the decay rate of the scattered light intensity was correlated to the sample characteristics by artificial neural networks, providing 0.09 wt% and 0.3 cm/s errors concentration and velocity measurements, respectively.
Referências
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