defect detection system of a bladed wheel engine aircraft

The invention relates to a method and an on-board collision sensing system for a bladed wheel of an aircraft engine, comprising: - acquisition means (13) for acquiring representative deflection signals deflections on the blades said bladed wheel, - calculation means (15) for correlating each of said deflection signals with a typical pulse signal of an impact on a sound blade to the engine rotation frequency to identify the impacts on the wheel bladed, - calculation means (15) for extracting impact of said deflection signals signals, and - transmission means (19) for transmitting said impact ground signals so that these signals are analyzed to detect defects on the blades of the bladed wheel.