Design and Research of Electrostatic Sensor Based on Aero-engine Airway Electrostatic Monitoring Technology

Abstract Aero-engine airway electrostatic monitoring technology is a new type of aero-engine airway fault monitoring technology, which has a good development prospect. The principle of this technology is to realize the acquisition of the electrostatic signal of solid charged particles in the engine tail nozzle through the electrostatic sensor, and to judge the fault degree of the engine air circuit through the analysis of the electrostatic signal. In this paper, the electrostatic sensor is designed and manufactured according to the principle of electrostatic induction, what’s more, the measurement circuit is designed and manufactured, and the noise and interference in the electrostatic signal are eliminated. The validity of the measurement circuit is verified by simulation test. Finally, according to the self-designed test platform of gas-path electrostatic monitoring based on small turbojet engine, the test of electrostatic sensor and measurement circuit was completed, and the electrostatic signal was collected, which preliminarily verified the feasibility and effectiveness of gas-path electrostatic detection method.