公开(公告)号：US20190107463A1

公开(公告)日：2019-04-11

申请号：US16088648

申请日：2017-03-16

申请人： TOMOE VALVE CO., LTD. ,  THE RITSUMEIKAN TRUST

发明人： Masato SUGA ,  Manabu MIYAMOTO ,  Yasutoshi NOMURA

IPC分类号： G01M13/003 ,  F16K37/00

摘要： 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.