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[CN 201911385195.5] Signal Processing Method for Multi-link Mechanism Condition Monitoring of Large Mechanical Press
[CN 201911385195.5] Title of Signal Processing Method for Multi-link Mechanism Condition Monitoring of Large Mechanical Press: Application Number of Signal Processing Method for Multi-link Mechanism Condition Monitoring of Large Mechanical Press: CN 201911385195.5 Applicant: Xi 'an Jiaotong University Application Date: 2019-12-28 Patent Type: Application for the Invention The present invention discloses a signal processing method for multi-link condition monitoring of large mechanical press, which analyzes the collected signals, to judge the lubrication state of the multi-link mechanism of the mechanical press. Among them, the signal is intercepted in the whole period, and the mold replacement time is judged by the similarity calculation of dynamic time warping, and the current mold is judged by the stamping process included in each mold, and the bearing wear amount is judged according to the crank angle of the reversing impact. The signal of the non-stamping stage is intercepted for wavelet packet decomposition, and the signal of the natural frequency segment of the oil film is taken for orthogonal matching to obtain the pulsating oil pressure signal, the oil supply state is judged according to the normalized matched oil pressure pulse signal. Compared with the monitoring of the distributor plunger action times, the monitoring and diagnosis of the running state of the multi-link is realized, which makes up for the monitoring blind spot at this stage.
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