AN INTELLIGENT NEURAL NETWORK BASED GAS DETECTION SYSTEM USING METAL OXIDE GAS SENSOR

Abstract

Probabilistic Neural Network (PNN) has been used to ensure the reliable evaluation of responses from Zinc Oxide (ZnO) based sensors comprising of as deposited ZnO nanoflakes. Nanoflakes were deposited on a SiO2 coated p-Si substrate by a low cost chemical deposition technique. One type of sensor structure, to investigate the effect of catalytic metal alloy electrode (Pd-Ag) was fabricated in a standard laboratory. This paper reports the development of an artificial neural network based model and a special types of neural network i.e. PNN is used for successfully recognizing different concentrations of methane with two different metal contacts. The data obtained from the sensors have been analyzed using MATLAB. PNN is based on Radial Basis function. PNN classifier has been able to detect the toxic gas with 95.2 % sensitivity.