Gas sensor, gas-insulated combination device gas detection system and method

Abstract

This application relates to a gas sensor, a gas detection system and method for gas-insulated combined equipment. A resonator is coupled to the end of a biconical micro / nano fiber structure to achieve cyclic resonance of the optical signal through evanescent field coupling. The composite micro / nano fiber gas sensor has a sensing area disposed within the gas-insulated combined equipment, and a composite sensing layer is coated on the surface of the sensing area. The composite sensing layer includes an adhesion substrate, a corrosive gas adsorption layer, and a protective layer arranged sequentially. On the one hand, compared to traditional technologies, it exhibits higher detection sensitivity for sulfur dioxide, a representative product of sulfur hexafluoride decomposition, and reduces temperature interference, thereby directly improving the early fault warning capability of the gas-insulated combined equipment and reducing the accident rate. On the other hand, the inherent safety characteristics of optical fibers ensure adaptability to high-voltage environments, overcoming the problems existing in traditional gas chromatography, electrochemical sensing, tube detection, and spectroscopic methods.

Images