Carbon Potential Measurement and Control System Based on Gas Sensors Array

This paper presents the principles and experiment results of a new carbon potential control system based on the gas sensors array. The carbonizing process is controlled with the sensors outside of the heat treatment furnaces. The phase transformation dynamic model was employed to the feature extraction of the responding signals of gas sensors. The mathematical model built with the feature vectors can be used to calculate the carbon potential. The relationships between carbon potential and responding signals of gas sensors were established. Working environment of sensors were greatly improved comparing with those sensors working in the heat treatment furnaces. The measurement precision satisfys the needs of carbonizing processes.