Blasting vibration signal noise reduction method based on EMD and VMD

The invention discloses a blasting vibration signal noise reduction method based on EMD and VMD. The method comprises the following steps of firstly, carrying out the EMD on original blasting vibration signals to obtain intrinsic mode functions and the number n thereof; then, calculating the power spectral densities of the original blasting vibration signals and the intrinsic mode functions; finding out the maximum value and the corresponding frequency of the power spectral density of each intrinsic mode function; judging the ratio of the power spectral density of each intrinsic mode functionto the power spectral density of each original bursting vibration signal at the frequency; if the ratio is smaller than 10%, regarding the original bursting vibration signal as a noise signal, and recording the number of noise signals as j; and finally, carrying out the VND on the original blasting vibration signals, filtering components with the central frequencies lower than 10Hz and higher than200Hz, and reconstructing