Title:
VALVE STATE DIAGNOSIS SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/146295
Kind Code:
A1
Abstract:
This invention addresses the problem of providing a system for monitoring and diagnosing the state of a valve in a robust manner against the effect of noise. The valve state diagnosis system has a sensor (104) for reading valve operation information. A signal generated during valve blockage is extracted by a valve opening/closing section extraction unit (210) using a reference signal corresponding to an open/close command, and a feature amount representing the shape of the time change of the signal is calculated by a feature amount calculation unit (203). An abnormality degree is calculated by an abnormality degree calculation unit (204) using the feature amount and a model parameter for a normal signal model (205). A state determining unit (206) determines the valve state by using the abnormality degree, and presents a complete valve stoppage state, a sudden opening/closing fault, a faulty opening/closing state due to aging degradation, a replacement period recommendation state due to aging degradation, etc., to a diagnosis result presentation unit (207).
Inventors:
TAKASHIMA RYOICHI (JP)
KAWAGUCHI YOHEI (JP)
TOGAMI MASAHITO (JP)
KAWAGUCHI YOHEI (JP)
TOGAMI MASAHITO (JP)
Application Number:
PCT/JP2015/053046
Publication Date:
October 01, 2015
Filing Date:
February 04, 2015
Export Citation:
Assignee:
HITACHI HIGH TECH CORP (JP)
International Classes:
G05B23/02
Foreign References:
| JPH04337180A | 1992-11-25 | |||
| JPH04296299A | 1992-10-20 | |||
| JPH11282523A | 1999-10-15 | |||
| JPS63309824A | 1988-12-16 | |||
| JP2002174549A | 2002-06-21 | |||
| US5646600A | 1997-07-08 |
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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