VALVE DIAGNOSIS METHOD AND VALVE DIAGNOSIS DEVICE

A diagnosis method is provided for appropriately predicting a state change of a valve with a simple configuration. The valve diagnosis method comprises: calculating a value of a first rate of change, with respect to a predetermined damage index during reference data acquisition, of the predetermined...

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Bibliographische Detailangaben
Hauptverfasser:	SUGA, Masato, NOMURA, Yasutoshi, MIYAMOTO, Manabu
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MEASURING MECHANICAL ENGINEERING PHYSICS TAPS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A diagnosis method is provided for appropriately predicting a state change of a valve with a simple configuration. The valve diagnosis method comprises: calculating a value of a first rate of change, with respect to a predetermined damage index during reference data acquisition, of the predetermined damage index during diagnosis; calculating a value of a second rate of change, with respect to a root mean square value calculated from a difference between predicted waveform data of vibration during reference data acquisition and vibration data serving as reference, of a root mean square value calculated from a difference between predicted waveform data of vibration during diagnosis and vibration data during diagnosis; in a plane, arranging a plot of a diagnostic result based on a value of the first rate of change being calculated and a value of the second rate of change being calculated; and determining a state of a valve to be diagnosed based on a value of the first rate of change being calculated, a value of the second rate of change being calculated, and an arrangement position on the plane of a plot of the diagnostic result.