Abnormal diagnosis equipment and maintenance management system
By performing frequency decomposition and peak detection of the sensor output signal of the rotating mechanical system, combined with the diagnosis confidence judgment, the problem of low diagnostic reliability under mild equipment deterioration and high noise in the prior art is solved, and higher diagnostic confidence and reliability are achieved.
CN115380197BActive Publication Date: 2025-03-28HITACHI LTD
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Patent Information
- Application Number
- CN202180026558.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-04-13
- Filing Date
- 2021-04-05
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2041-04-05
AI Technical Summary
Technical Problem
In the case of mild equipment deterioration and high noise, it is difficult to distinguish the increase in signal strength caused by equipment deterioration from noise signals, resulting in a decrease in the reliability of diagnostic results.
Method used
The data measurement unit, frequency decomposition unit, peak detection unit, abnormal diagnosis unit and diagnostic confidence determination unit are used to improve the reliability of diagnosis by performing frequency decomposition, peak detection and confidence determination of sensor output signals.
Benefits of technology
In the case of mild equipment deterioration and high noise, the confidence and reliability of abnormal diagnosis are improved, and the phenomenon of over-judging equipment abnormalities is avoided.
✦ Generated by Eureka AI based on patent content.
Abstract
The object of the present invention is to provide an abnormality diagnosis device for a rotating mechanical system that can determine the confidence of abnormality diagnosis and improve the reliability of diagnosis compared with the prior art. Therefore, in order to solve the above technical problems, the abnormality diagnosis device of the present invention has: a data measurement unit that measures the output signal of a sensor installed in a device to be diagnosed; a frequency decomposition unit that decomposes the measurement signal of the data measurement unit into frequency components; a peak detection unit that detects the peak of the frequency component decomposed by the frequency decomposition unit; an abnormality diagnosis unit that diagnoses the abnormality of the device to be diagnosed based on the intensity of the peak detected by the peak detection unit; and a diagnosis confidence determination unit that determines the confidence of the abnormality based on the change in the frequency of the peak detected by the peak detection unit.
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