Functional analysis in long-term operation of high power UV-LEDs in continuous fluoro-sensing systems for hydrocarbon pollution

Arqués Orobón, Francisco José and Núñez Mendoza, Neftalí and Vázquez López, Manuel and González Posadas, Vicente (2016). Functional analysis in long-term operation of high power UV-LEDs in continuous fluoro-sensing systems for hydrocarbon pollution. "Sensors", v. 16 (n. 3); pp. 1-16. ISSN 1424-8220. https://doi.org/10.3390/s16030293.

Description

Title: Functional analysis in long-term operation of high power UV-LEDs in continuous fluoro-sensing systems for hydrocarbon pollution
Author/s:
  • Arqués Orobón, Francisco José
  • Núñez Mendoza, Neftalí
  • Vázquez López, Manuel
  • González Posadas, Vicente
Item Type: Article
Título de Revista/Publicación: Sensors
Date: 2016
ISSN: 1424-8220
Volume: 16
Subjects:
Freetext Keywords: Continuous real-time sensing; pollution identification; UV-LED sensing; fluorescence spectroscopy; water pollution
Faculty: E.T.S.I. y Sistemas de Telecomunicación (UPM)
Department: Teoría de la Señal y Comunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This work analyzes the long-term functionality of HP (High-power) UV-LEDs (Ultraviolet Light Emitting Diodes) as the exciting light source in non-contact, continuous 24/7 real-time fluoro-sensing pollutant identification in inland water. Fluorescence is an effective alternative in the detection and identification of hydrocarbons. The HP UV-LEDs are more advantageous than classical light sources (xenon and mercury lamps) and helps in the development of a low cost, non-contact, and compact system for continuous real-time fieldwork. This work analyzes the wavelength, output optical power, and the effects of viscosity, temperature of the water pollutants, and the functional consistency for long-term HP UV-LED working operation. To accomplish the latter, an analysis of the influence of two types 365 nm HP UV-LEDs degradation under two continuous real-system working mode conditions was done, by temperature Accelerated Life Tests (ALTs). These tests estimate the mean life under continuous working conditions of 6200 h and for cycled working conditions (30 s ON & 30 s OFF) of 66,000 h, over 7 years of 24/7 operating life of hydrocarbon pollution monitoring. In addition, the durability in the face of the internal and external parameter system variations is evaluated.

More information

Item ID: 45974
DC Identifier: http://oa.upm.es/45974/
OAI Identifier: oai:oa.upm.es:45974
DOI: 10.3390/s16030293
Official URL: http://www.mdpi.com/1424-8220/16/3/293
Deposited by: Memoria Investigacion
Deposited on: 30 Jan 2018 18:46
Last Modified: 30 Jan 2018 18:46
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