Title :
Colored light-to-voltage converters based absorbance meter
Author :
Pereira, M. ; Postolache, O. ; Girão, P. ; Ramos, Jelena
Author_Institution :
Escola Superior de Tecnologia, Instituto Politecnico de Setubal, Portugal
Abstract :
A low-cost absorbance meter for dissolved compounds identification and concentration evaluation is proposed. The main elements of the system are a white light source and a set of three colored light-to-voltage converters. The system includes auto-calibration capabilities and compensates spectral sensitivity variation of the optical source and detectors. A neural network-processing scheme is used to identify dissolved compounds and evaluate the correspondent concentrations.
Keywords :
calibration; neural nets; photodetectors; spectrochemical analysis; absorbance meter; auto-calibration; colored light-to-voltage converter; concentration measurement; dissolved compound identification; neural network; optical detector; spectral sensitivity compensation; white light source; Chemical processes; Gain measurement; Integrated optics; Microcontrollers; Optical noise; Optical sensors; Optical signal processing; Particle measurements; Time measurement; Velocity measurement;
Conference_Titel :
Sensors for Industry Conference, 2002. 2nd ISA/IEEE
Print_ISBN :
1-55617-834-4
DOI :
10.1109/SFICON.2002.1159796
