SOLENOID VALVE ABNORMALITY DETECTION DEVICE, AUTOMATIC MEDICAL ANALYSIS APPARATUS USING SAME, AND SOLENOID VALVE ABNORMALITY DETECTION METHOD

WIPO Patent Application WO/2021/229895

A1

The present invention accurately estimates the opening state of a solenoid valve using a feature amount based on driving current information of the solenoid valve. A solenoid valve abnormality detection device 30, which uses a driving current pattern associated with valve opening of a solenoid valve 10 and detected by a current sensor 31 to detect an abnormality of the solenoid valve, comprises: a feature amount extraction unit 32 that determines a feature amount of a driving current pattern associated with valve opening of the solenoid valve within a predetermined detection period; a feature amount correction unit 33 that estimates the valve temperature of the solenoid valve from a saturation current value of the solenoid valve and corrects the feature amount determined by the feature amount extraction unit to a value at a reference temperature on the basis of the estimated valve temperature; and an opening state estimation unit 34 that estimates the opening state of the solenoid valve using the feature amount value corrected by the feature amount correction unit and an estimation model that estimates the opening state of a solenoid valve from a feature amount of a driving current pattern associated with valve opening of the solenoid valve.

ZHOU GUANGBIN (JP)
SUZUKI HIROSHI (JP)
YOSHIDA GOROU (JP)
TANAKA KAZUHIRO (JP)

PCT/JP2021/007844

November 18, 2021

March 02, 2021

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HITACHI HIGH TECH CORP (JP)

F16K31/06; G01N35/00; H01F7/16

WO2018055931A1

2018-03-29

JP2001197772A	2001-07-19
JPH0633730B2	1994-05-02
JP2015233054A	2015-12-24
JP2014092068A	2014-05-19
JP2016121923A	2016-07-07

See also references of EP 4151892A1

POLAIRE I.P.C. (JP)

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