Self-Validating Chemical Sensor Array and Its Application Prospect in Machine Olfaction

Chemical gas sensor array is a common information acquisition device in current machine olfactory systems. However, due to the characteristics of the sensitive materials in the chemical gas sensor, the measurement quality of sensor array decreases in long-term practical application, which gradually affects the analytical results of the machine olfactory system as the time goes on. The self-validating sensor has fault detection and isolation module, fault diagnosis module, fault recovery module and uncertainty analysis module. These functions of self-validating sensor are suitable for monitoring the reliability of the chemical sensor array. In this paper, the self-validating sensor technology is introduced into chemical gas sensor array to improve the measurement quality, so as to improve the overall performance of machine olfactory system. A prototype of self-validating chemical sensor array is designed to illustrate the feasibility of its application in machine olfactory system.