Abstract: The principle and characteristics of aircraft engine gas path debris monitoring technology is presented. Simulated experiment facilities are developed to prove the feasibility of this technology. Charged particles with different diameters are generated as simulated fault debris in the gas path of an aircraft engine. A probe type sensor is used to monitor the induced signal of the fast moving charged particles. A signal conditioner unit amplifies the induced charge signal and then converts the induced charge into a proportional voltage signal. The results show: ①charged moving particles can be monitored; ②inductive voltage is relevant to the particle size; ③shape of the inductive voltage is relevant to the particle characteristics; ④the signal of a mixture of small charged particle cluster and single large charged object presents its own characteristics respectively.

Key words: aircraft engines, gas path, debris, monitoring, charged particles, simulated experiment