公开(公告)号：US12228476B2

公开(公告)日：2025-02-18

申请号：US17781475

申请日：2021-07-29

Applicant: Northeastern University

Inventor： Feng Luan ,  Xu Li ,  Ziming Zhang ,  Yan Wu ,  Yuejiao Han ,  Dianhua Zhang

IPC: G01M99/00 ,  G01H17/00 ,  G06F18/2131 ,  G06F18/24 ,  G06N3/04 ,  G06N3/044 ,  G06N3/045 ,  G06N3/0464 ,  G06N3/08 ,  H04R1/40

Abstract: Provided is a fault signal locating and identifying method of industrial equipment based on a microphone array. The method includes the steps of: acquiring sound signals and dividing the acquired signals into a training set, a verifying set and a test set; performing feature extraction on the sound signals in the training set, and extracting a phase spectrogram and an amplitude spectrogram of a spectrogram; sending an output of a feature extraction module, as an input, to a CNN, and in each layer of the CNN, learning a translation invariance in the spectrogram by using a 2D CNN; in between the layers of the CNN, normalizing the output by using a batch normalization, and reducing a dimension by using a maximum pooling layer along a frequency axis; sending an output from the layers of the CNN to layers of RNN; using a linear activation function; and inputting an output of a full connection layer to two parallel full connection layer branches for fault identification and fault location, respectively.