VALVE DIAGNOSIS METHOD AND VALVE DIAGNOSIS DEVICE

WIPO Patent Application WO/2017/169849

A1

The present invention provides a diagnosis method for properly predicting a valve state change using a simple configuration. A valve diagnosis method according to the present invention includes: a step for calculating the value of a first rate of change from a prescribed damage index during reference data acquisition to the prescribed damage index during diagnosis; a step for calculating a second rate of change from the mean square calculated from the differences between predicted waveform data for oscillation during reference data acquisition and oscillation data serving as a reference to the mean square calculated from the differences between predicted waveform data for oscillation during diagnosis and oscillation data during diagnosis; a step for placing a plot of the diagnosis results on a plane on the basis of the calculated value of the first rate of change and the calculated value of the second rate of change; and a step for determining the state of a valve to be diagnosed on the basis of the calculated value of the first rate of change, the calculated value of the second rate of change, and the placement position on the plane of the plot of the diagnosis results.

JP5637116	Valve operation start judgment method
JP4154257	Test equipment for vehicle drive system components
JPH02297361	ARTIFICIAL ARTICULATION SIMULATOR

SUGA MASATO (JP)
MIYAMOTO MANABU (JP)
NOMURA YASUTOSHI (JP)

PCT/JP2017/010675

October 05, 2017

March 16, 2017

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TOMOE VALVE CO LTD (JP)
RITSUMEIKAN TRUST (JP)

G01M13/00; F16K37/00

WO2015146295A1

2015-10-01

US20150362090A1	2015-12-17
JPS60171507A	1985-09-05

SAMEJIMA, Mutsumi et al. (JP)

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