@misc{10481/85492,
year = {2012},
url = {https://hdl.handle.net/10481/85492},
abstract = {This paper presents a portable instrument designed and characterized for the determination of gaseous
oxygen. It is based on quenching the luminescence intensity of the platinum octaethylporphyrin complex
when it is excited, using a light-emitting diode (LED) with an emission peak at 380 nm. The luminescence
emitted by the platinum complex is detected by taking an image with a colour CCD micro-camera integrated
in the prototype which makes it possible to do a two-dimensional analysis of the luminescence.
This image is processed by a microcontroller to obtain the red colour component of the RGB colour space,
thus discarding any unnecessary colour information. The processing is carried out for the pixels over a
large area of the sensing membrane, which allows for a statistical treatment of the obtained data. The
measured R-value for the membrane can be directly related to the concentration of the surrounding
oxygen. The resulting instrument has been fully characterized and calibrated, including drifts due to
temperature and time. In addition, an application for Android camera devices such as smartphones was
developed in order to use them as detectors and image processors to provide a prediction of the gaseous
oxygen concentration.},
organization = {Ministerio de Ciencia e Innovación, Dirección General
de Investigación y Gestión del Plan Nacional de I+D+i (Spain) (Projects CTQ2009-14428-C02-01
and CTQ2009-14428-C02-02)},
organization = {Junta de Andalucía (Proyectos de Excelencia P08-FQM-
3535 and P10-TIC-5997)},
organization = {European Regional
Development Funds (ERDF)},
keywords = {Oxygen},
keywords = {Optical gas sensor},
keywords = {Luminescence},
keywords = {Micro-camera},
keywords = {Portable instrumentation},
keywords = {Android},
keywords = {Camera phone},
title = {Determination of o2 using colour sensing from image processing with mobile devices},
doi = {10.1016/j.snb.2012.06.007},
author = {López Ruiz, Nuria and Martínez Olmos, Antonio and Pérez de Vargas Sansalvador, Isabel María and Fernández Ramos, María Dolores and Carvajal Rodríguez, Miguel Ángel and Capitán Vallvey, Luis Fermín and Palma López, Alberto José},
}