Calibration and Source Localization Using an Array of Resistive Metal Oxide Gas Sensors

This paper introduces a sensor calibration and gas source localization method designed for the challenging task of detecting gas leaks in open environments using multiple low-cost sensors that can be randomly distributed in a coverage area. Low-cost sensors, such as Metal Oxide resistive sensors, suffer from very large sensor-to-sensor variations in their detection range, noise floor, and limited sensitivity. The proposed approach begins with a self-calibration process that leverages known source locations to fine-tune their performance parameters. The independent calibration of sensors results in more precise measurements. Furthermore, we propose a computationally efficient technique that achieves high-precision gas source localization. Our methodology is compared with existing localization techniques to demonstrate its effectiveness.