Plastic optical fibre sensor for Madeira wine monitoring

Abstract

Madeira wine is a fortified wine produced in Madeira Island, Portugal. Its characteristics are strongly influenced by the winemaking method used which includes a typical and unique step called estufagem. This process consists on heating the wine up to 55 ºC for at least 3 months. In this paper, the characterization of the sensor for the pilot scale facility of estufagem installed in Madeira University is presented, being the device an optimization of a previous version. The response of the sensor was tested towards colour and refractive index, showing a good performance. Madeira wine with different estufagem times was also analysed.

Low cost color assessment of turbid liquids using supervised learning data analysis – Proof of concept

“…The sensor here presented is based on the 0º transmission and the 90º scattering light measurement. Previous work on this concept can be consulted in [6,20,21]. The sensor has four LEDs sources from Industrial Fiber Optics, Inc. with central wavelength of 430 nm (IF E92), 522 nm (IF E93), 660 nm (IF E97) and 870 nm (IF E91D) with bandwidth of 65, 40, 40 and 50 nm respectively.…”

Low-Cost Sensing with Plastic Optical Fibers—From Turbidity and Refractive Index to Chemical Sensing

“…However, by using an array of colored LEDs, namely in the red, green and blue wavelength, added to the IR one, it is possible to have a color measurement simultaneously with the turbidity measurement. This approach was developed in 2013 by Ferreira et al [6,7] and developed further [8][9][10]. To increase the accuracy and resolution of the turbidity and color measuring, Duarte et al developed a Data Fusion algorithm capable of combining information from the multiple wavelength sources and schemes of measurement by extracting the best features of each one to the best result possible [11,12].…”

Turbidity and RI Dependency of a Polymer Optical Fiber-Based Chromatic Sensor

“…Another approach presented by Zhou et al [11] uses filters in the light path between the white LEDs sources and the sample holder instead of different color LEDs. The only in situ and online measurement device found in literature ready for color measurement was presented by Novo et al [12,13] and Shrake et al [14] for wine monitoring. Novo uses the advantages of polymer optical fiber (POF) miniaturization and maneuverability to create four separate air-gap regions between two fiber extremities in a sensor head structure where the wine to be measured will flow.…”