Wear debris sensor sensitivity increasing method based on combination of band-pass filtering and correlation operation

The invention discloses a wear debris sensor sensitivity increasing method based on combination of band-pass filtering and correlation operation to increase the signal sensitivity of existing wear debris sensors. On the basis of the existing inductive wear debris sensors, two sensors are connected in series and mounted in an oil pipeline, and the sensitivity of acquired signals of the two sensors can be increased by 2.76 times with the method, so that smaller wear debris can be detected, and the method is applied to failure diagnosis based on wear debris information.