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Article

Performing Calibration of Transmittance by Single RGB-LED within the Visible Spectrum

1
Department of Mining and Civil Engineering, Technical University of Cartagena, 30202 Cartagena, Spain
2
Department of Information and Communications Technologies, Technical University of Cartagena, 30202 Cartagena, Spain
3
Department of Electronic Technology, Technical University of Cartagena, 30202 Cartagena, Spain
*
Authors to whom correspondence should be addressed.
Sensors 2020, 20(12), 3492; https://doi.org/10.3390/s20123492
Received: 8 April 2020 / Revised: 2 June 2020 / Accepted: 17 June 2020 / Published: 20 June 2020
(This article belongs to the Section Optical Sensors)
Spectrophotometry has proven to be an effective non-invasive technique for the characterization of the pollution load of sewer systems, enabling compliance with new environmental protection regulations. This type of equipment has costs and an energy consumption which make it difficult to place it inside a sewer network for real-time and massive monitoring. These shortcomings are mainly due to the use of incandescent lamps to generate the working spectrum as they often require the use of optical elements, such as diffraction gratings, to work. The search for viable alternatives to incandescent lamps is key to the development of portable equipment that is cheaper and with a lower consumption that can be used in different points of the sewer network. This research work achieved the following results in terms of the measured samples: First, the development a calibration procedure that enables the use of RGB-LED technology as a viable alternative to incandescent lamps, within the range of 510 to 645 nm, with high accuracy. Secondly, demonstration of a simple method to model the transmittance value of a specific wavelength without the need for optical elements, achieving a cost-effective equipment. Thirdly, it provides a simple method to obtain the transmittance based on the combination of RGB colors. Finally its viability is demonstrated for the spectral analysis of wastewater. View Full-Text
Keywords: RGB-LED spectrophotometer; water pollutants; transmittance modelling; cost effective RGB-LED spectrophotometer; water pollutants; transmittance modelling; cost effective
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MDPI and ACS Style

Carreres-Prieto, D.; García, J.T.; Cerdán-Cartagena, F.; Suardiaz-Muro, J. Performing Calibration of Transmittance by Single RGB-LED within the Visible Spectrum. Sensors 2020, 20, 3492. https://doi.org/10.3390/s20123492

AMA Style

Carreres-Prieto D, García JT, Cerdán-Cartagena F, Suardiaz-Muro J. Performing Calibration of Transmittance by Single RGB-LED within the Visible Spectrum. Sensors. 2020; 20(12):3492. https://doi.org/10.3390/s20123492

Chicago/Turabian Style

Carreres-Prieto, Daniel, Juan T. García, Fernando Cerdán-Cartagena, and Juan Suardiaz-Muro. 2020. "Performing Calibration of Transmittance by Single RGB-LED within the Visible Spectrum" Sensors 20, no. 12: 3492. https://doi.org/10.3390/s20123492

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