Condition monitoring device, pump, condition monitoring program, condition monitoring method, and frequency band setting method
The state monitoring device uses detection coils to synthesize and process magnetic flux signals for precise pump component monitoring, addressing the limitations of existing technologies in detecting rotor position displacements and predicting component wear.
JP2026110340AActive Publication Date: 2026-07-02NIKKISO CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- NIKKISO CO LTD
- Filing Date
- 2024-12-20
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Existing pump monitoring devices fail to accurately monitor the state of rotating components, such as bearings, due to limitations in detecting periodic displacements of the rotor position, which can indicate wear and other abnormalities.
Method used
A state monitoring device utilizing multiple detection coils on the stator to detect changes in magnetic flux, synthesizing and processing these signals to generate monitoring spectra for comparison with reference spectra, determining normal or abnormal states based on these comparisons.
Benefits of technology
Enables precise monitoring of pump components by detecting periodic displacements of the rotor position, allowing for early detection of wear and other abnormalities, thereby preventing pump failure.
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Smart Images
Figure 2026110340000001_ABST
Abstract
The condition of the pump is monitored, which manifests as a periodic displacement of the rotor's position. [Solution] The state monitoring device 4 according to the present invention monitors the state of the pump being monitored based on detection signals output from a plurality of detection coils C1 to C4 that detect changes in magnetic flux corresponding to the displacement of the rotor position relative to the stator of the pump motor. The state monitoring device 4 comprises an acquisition unit 420 that acquires at least one of a first combined signal and a second combined signal over time; a spectrum generation unit 421 that performs FFT processing on the signals acquired by the acquisition unit to generate a monitoring spectrum; a storage unit 43 that stores a monitoring frequency band set in advance for the monitored object and a reference spectrum to be compared with the monitoring spectrum; and a determination unit 425 that determines whether the state of the monitored object corresponding to the monitoring frequency band is normal or abnormal based on a comparison between the latest monitoring spectrum and the reference spectrum in the monitoring frequency band.
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