Seawater pump fault monitoring device and diagnosis method based on multi-source information fusion

Abstract

The invention belongs to the technical field of fault diagnosis, and particularly relates to a fault monitoring device and diagnosis method based on multi-source signal fusion, and the device comprises a vibration signal collection unit A, a current signal collection unit B, and a signal processing unit C; the signal acquisition units A and B use sensors to acquire vibration and current data of the seawater cooling pump; the signal processing unit C carries out fast Fourier transform (FFT) processing on the signals to obtain frequency domain information, and the fault monitoring device can monitor the time-frequency domain states of vibration signals and current signals of the sea water pump in real time and is used as data preparation for fault diagnosis. According to the seawater pump fault diagnosis method based on multi-source information fusion, the migration kernel locality preserving projection algorithm is used as a model, multi-source signal information obtained by a fault monitoring device is used as input, Acc and F1-score are used as evaluation indexes, and a trained classifier is used for classifying and identifying unknown fault data, so that fault information can bequickly obtained, the generalization ability is enhanced, and the diagnosis accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis, and in particular relates to a fault monitoring device and a diagnosis method based on multi-source signal fusion. Background technique [0002] With the development of intelligent ship informatization and the continuous improvement of product technology in the industry, the operation health of ship auxiliary equipment has begun to receive attention. Seawater pumps are an important component of the cooling system of marine auxiliary engines. Whether they can operate normally is related to the safety of the ship, so it is of great significance to diagnose their faults. The seawater pump unit is driven by a motor, and is composed of pump body, impeller, bearing and mechanical seal. smoothness. [0003] At present, seawater pumps generally use vibration signals and alarms for fault monitoring. The existing methods usually arrange crew members to use hand-held vibrometers for periodic vibra...

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Problems solved by technology

[0005] In order to overcome the technical problems of seawater pump single-signal monitoring, non-concrete fault information, multi-source data fusion, and poor diagnostic accuracy in the prior art, the present invention provides a seawater pump fault monitoring device and diagnosis method based on multi-source information coupling to migrate nuclear local Keeping the projection algorithm as the model, the time-frequency domain information of the vibration signal and current signal collected by various sensors is used as the model input, based on the evaluation index of data fusion, and the multi-source data of the seawater pump to be diagnosed is used by the trained classifier Classification and identification can quickly obtain specific fault information and improve the accuracy of fault diagnosis

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