Hybrid Optical Fiber Multipoint Monitoring System Using WMS and FBG: Laboratory and Field Tests
Claudio Floridia·João Batista Rosolem·Rivael Strobel Penze·Ednardo Moreira Santos·Victor Diago·Filipe H. Cardoso
An all-passive, multipoint, and multiparameter optical monitoring system was developed and deployed in an industrial environment for the simultaneous measurement of methane concentration and other physical parameters. Methane is detected via rapid wavelength modulation spectroscopy at 1648.2 nm and 4MHz frequency. An attenuation invariant quantity defined by the peaks at 0, 4 and 8 MHz of the Fast Fourier Transform (FFT) of temporal signal is employed, characterized and validated. Other paramete