The invention discloses a
vibration signal processing method based on self-
adaptive wavelet packet and
deep learning fusion, and belongs to the field of
sewage plant equipment fault diagnosis. The method aims at solving the problems that traditional
signal processing is poor in flexibility, the non-stationary
signal processing capacity is weak, the
deep learning data requirement is large, and the high-frequency weak feature capturing capacity is limited. According to the method, the high-frequency acceleration sensor is adopted, the vibration signals of the
sewage plant equipment are accurately collected, the self-
adaptive wavelet packet
decomposition technology is applied, the primary function is dynamically selected, the number of
decomposition layers is optimized, self-adaptive threshold
noise reduction is achieved, and the
signal processing quality is improved. Meanwhile, in combination with a one-dimensional
convolutional neural network and a bidirectional LSTM model, local and global features of the signal are extracted respectively, and pre-processed data are formed through gating weighted fusion. According to the method, the signal-to-
noise ratio and the weak
fault detection rate are remarkably improved, feature redundancy and data requirements are reduced, the calculation efficiency and diagnosis accuracy are improved, the method is suitable for
sewage plant equipment fault diagnosis, and the industrial applicability is enhanced.