New Optical Gas Sensor for Gas Concentration Measurement Using Digital Image Processing

This paper proposes a new method for gas concentration measurement. The method relies on the principle of plasma emissions of gases under high voltage. We proposed a method that uses digital image processing to model the color mixing of the emissions of the gases. The application of the inverse model allows us to get the percentages of each gas in a mixture of up to four gases knowing already the color of emission of the whole mixture and the color of emission of each gas alone. Our proposed sensor has the advantages of high selectivity where it is not limited to a certain number of gases and is considered to be a good candidate for miniaturization. (C) 2014 Elsevier B.V. All rights reserved.