Optical Fiber Based Turbidity Sensing System

O. Postolache, J.M. Dias Pereira, P. Silva Girão

Abstract

This paper presents a multi-path scattering turbidity sensing architecture that uses two bifurcated and two simple optical fiber bundles. Two optical infrared (IR) emitters and four receivers are coupled to the optical fibers assuring the IR excitation of the measured medium and the IR light scattering detection. The proposed turbidity architecture is rugged and permits to evaluate turbidity using IR light scattering and transmission measuring architectures with improved signal-to-noise ratio. A multifunction microcontroller based I/O interface is connected to a LabVIEW HMI interface (NI TPC-2006) that performs the turbidity sensing channel acquisition and control, and turbidity direct digital read-out based on a neural network. Additional wireless communication capability (IEEE802.11g) is included in the system.

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DOI

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IMEKO TC

TC19 - Environmental Measurements

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