Viscu00e2metro based on Bragg grating or network of long period fiber u00e0ptica

摘要

Viscu00e2metro based on Bragg grating or network of long period fiber u00e0ptica. Viscu00f4metro compact immersion based namodulau00e7u00e3o acusto - u00e1ptica a Bragg grating or a network of long time (9).The excitation of the network by a flexural acoustic wave (20) generated by a piezoelectric element (3) leads to a change of the physical characteristics of the network, causing change in the spectral characteristic of the optical signal that crosses it. The change in the spectral characteristic occurs in a time of characteristic, which can be measured with a scanning system.This time is proportional to the viscosity of the fluid to measure, and in which the network is immersed.