Plastic optical fibre sensor for quality control in food industry

Novo, Catarina; Bilro, Lúcia; Ferreira, Rute A. S.; Alberto, Nélia; Antunes, Paulo; Leitão, Cátia; Nogueira, Rogério N.; Pinto, João

doi:10.1117/12.2025489

Cited by 5 publications

(5 citation statements)

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“…Turbidimeter designs have been proposed for applications such as quality control for the food industry [12], field measurements of suspended solids [13,14], and dynamic operation of small appliances [15]. Some proposals examine low-cost monitoring of turbidity in drinking water [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Towards the Development of an Affordable and Practical Light Attenuation Turbidity Sensor for Remote Near Real-Time Aquatic Monitoring

Trevathan

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Schmidtke³

2020

Sensors

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Turbidity is a key environmental parameter that is used in the determination of water quality. The turbidity of a water body gives an indication of how much suspended sediment is present, which directly impacts the clarity of the water (i.e., whether it is cloudy or clear). Various commercial nephelometric and optical approaches and products exist for electronically measuring turbidity. However, most of these approaches are unsuitable or not viable for collecting data remotely. This paper investigates ways for incorporating a turbidity sensor into an existing remote aquatic environmental monitoring platform that delivers data in near real-time (i.e., 15-min intervals). First, we examine whether an off-the-shelf turbidity sensor can be modified to provide remote and accurate turbidity measurements. Next, we present an inexpensive design for a practical light attenuation turbidity sensor. We outline the sensor’s design rationale and how various technical and physical constraints were overcome. The turbidity sensor is calibrated against a commercial turbidimeter using a Formazin standard. Results indicate that the sensor readings are indicative of actual changes in turbidity, and a calibration curve for the sensor could be attained. The turbidity sensor was trialled in different types of water bodies over nine months to determine the system’s robustness and responsiveness to the environment.

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Section: Introductionmentioning

confidence: 99%

Towards the Development of an Affordable and Practical Light Attenuation Turbidity Sensor for Remote Near Real-Time Aquatic Monitoring

Trevathan

Read

Schmidtke³

2020

Sensors

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“…This sensor is very close to an industrial one and it is an optimized solution that results from previous studies 12,13 , where it was possible to have information about the colour evolution of different wines during the laboratorial estufagem process, being the data in accordance with the colour offline Glories method. 13 However, an Tinta Negra index was als In Figures 3 and 4, the transmitted optical output of the four radiations for the glucose aqueous and glucose ethanolic (17%) solutions are presented, for the different glucose concentrations.…”

Section: Introductionmentioning

confidence: 95%

Plastic optical fibre sensor for Madeira wine monitoring

et al. 2014

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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.

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“…Compared with traditional sensors, optical sensors have the advantages of reliable stability, high accuracy, and fast response. Optical sensors are widely used in aerospace [1], industrial and agricultural production [2][3][4][5], and medical devices [6][7][8][9][10], among other fields. On-chip optical sensors possess not only the advantages of ordinary optical sensors, but also the characteristics of small volume, light weight, and robustness against electromagnetic interference [11,12].…”

Section: Introductionmentioning

confidence: 99%

Evanescent Field Controllable MZ Sensor via Femtosecond Laser Processing and Mechanic Polishing

et al. 2021

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Recently, optical sensors interacting with evanescent fields and the external environment around waveguides have attracted extensive attention. In the process of light propagation in the waveguide, the depth of the evanescent field is closely related to the accuracy of the optical sensor, and adjusting the depth of the evanescent field to obtain higher accuracy has become the primary challenge in fabricating on-chip optical sensors. In this study, the waveguide structure of a Mach–Zehnder interferometer was written directly in Corning Eagle 2000 borosilicate glass by a femtosecond laser, and the sensing window was exposed out of the bulk material by mechanical polishing. The refractive index detection device based on the proposed on-chip Mach–Zehnder interferometer has the advantages of small volume, light weight, and good stability. Its sensitivity can reach 206 nm/RIU or 337 dB/RIU, and the theoretical maximum measurement range is 1–1.508. Therefore, it can measure the refractive index quickly and accurately in extreme or complex environments, and has excellent application prospects.

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Plastic optical fibre sensor for quality control in food industry

Cited by 5 publications

References 0 publications

Towards the Development of an Affordable and Practical Light Attenuation Turbidity Sensor for Remote Near Real-Time Aquatic Monitoring

Towards the Development of an Affordable and Practical Light Attenuation Turbidity Sensor for Remote Near Real-Time Aquatic Monitoring

Plastic optical fibre sensor for Madeira wine monitoring

Evanescent Field Controllable MZ Sensor via Femtosecond Laser Processing and Mechanic Polishing

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