Tests indicate that WD restrains noise disturbance efficiently and makes it easy to distinguish de noised loose parts impact signals from complicate background noise to implement loose parts alarm favorably.

• 实验表明，小波去噪有效地抑制了噪声干扰，使得小波消噪后的跌落零件冲击信号与复杂背景噪声信号易于区分，从而利于实现对跌落零件的报警。