RT Journal Article
T1 Portable multispectral system based on color detector for the analysis of homogeneous surfaces
A1 Martínez Olmos, A
A1 Martínez Olmos, Pablo
A1 Erenas, M.M
A1 Escobedo, P
AB In this work, a compact affordable and portable spectral imaging system is presented. The system is intended to be employed in general applications, such as material classification or determination of the concentration of chemical species together with colorimetric sensors. The imaging device is reduced to a small digital color detector with an active area of 3x2mm2. This device provides a quantification of the incident emission in the form of four digital words corresponding to its averaged components blue, green, red, and near infrared. In this way, the size of the image is reduced to one pixel. The wavelength selection is carried out by means of a LED array disposed surrounding the color detector. The LEDs are selected to cover the wavelength range from 360 to 890nm. A sequential measurement protocol is followed, and the generated data is transmitted to an external portable device via a Bluetooth link where a classification protocol is implemented in a custom-developed Android application. The presented system has been applied in three different scenarios involving material classification, meat freshness monitoring, and chemical analysis. The analysis of the data using principal components shows that it is possible to find a set of wavelengths where the classification of the samples is optimal.
PB Hindawi
SN 1687-725X
YR 2019
FD 2019-01-01
LK https://hdl.handle.net/10016/38127
UL https://hdl.handle.net/10016/38127
LA eng
NO This work was supported by project CTQ2016-78754-C2-1-R from the Spanish Ministry of Economy and Competitiveness. P. Escobedo wants to thank the Spanish Ministry of Education, Culture and Sport (MECD) for a predoctoral grant (FPU13/05032). This study was partially supported by the Unidad de Excelencia de Química aplicada a biomedicina y medioambiente, Universidad de Granada.
DS e-Archivo
RD 19 jul. 2024