Aeroengine sealing gap measuring method

The invention belongs to the technical field of aeroengine sealing measurement and particularly relates to an aeroengine sealing gap measuring method. The method comprises the following steps of mounting an engine on a high-energy X-ray platform; adjusting the position of a radiation source to make a to-be-tested part positioned at the center of a projection image; scanning the to-be-tested part and obtaining the projection image; performing superimposed noise reduction and enhancement treatment on the projection image; performing template matching measurement and analysis on the projection image treated in step four to complete sealing gap measurement. The aeroengine sealing gap measuring method adopts a digital image template matching approach based on high-energy X-rays, belongs to non-destructive measurement, can be used for measuring any part in the engine especially in an engine running state, has high efficiency, and solves the problems that tests and modification need to be conducted in a traditional