Signal processing method, signal processing device, signal processing system and program product

By generating and calculating the difference in rotational Lissajous figures caused by the vibration of the target object, the problem of difficulty in diagnosing unexpected anomalies in the prior art is solved, and efficient anomaly determination of equipment status is achieved.

CN121048940APending Publication Date: 2025-12-02SEIKO EPSON CORP
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Patent Information

Application Number
CN202510701230.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-05-31
Filing Date
2025-05-28
Publication Date
2025-12-02

AI Technical Summary

Technical Problem

Existing technologies are insufficient for effectively identifying unexpected causes of abnormalities in the bearing parts of rotating equipment. They require the preparation of multiple benchmark Lissajous figures for comparison, which makes the determination difficult.

Method used

By generating Lissajous figures caused by the vibration of the target object, and rotating them to generate multiple Lissajous figures, the degree of difference at different angles is calculated as an indicator for anomaly determination.

Benefits of technology

Even in unexpected abnormal situations, it can effectively determine the abnormality of the equipment status, avoiding the need to prepare a reference Lissajous waveform diagram in advance and improving the accuracy of abnormality diagnosis.

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Abstract

The invention relates to a signal processing method, a signal processing apparatus, a signal processing system and a program product. Provided is a signal processing method capable of calculating an index by which a user can determine the presence or absence of an abnormality, even when an unexpected abnormality occurs in the state of a target object. A signal processing method generates a first Lissajous pattern on the basis of a physical quantity caused by vibration of a target object, sets N as an integer of 2 or more, rotates the first Lissajous pattern and generates second to Nth Lissajous patterns, and sets N as an integer of 2 or more and N or less for each of integers i of 2 or more and N or less. The (i-1) th difference degree, which is the difference degree between the first Lissajous figure and the i-th Lissajous figure, is calculated.
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