Title:
DIAGNOTIC METHOD FOR HYDRAULIC DEVICE
Document Type and Number:
Japanese Patent JP2615291
Kind Code:
B2
Abstract:
PURPOSE: To provide a diagnosis method for a hydraulic device enabling diagno sis to be made while keeping the equipments under operation, and making simple to perform the data processing.
CONSTITUTION: A reference value indicating the moved amount of a spool supplied to a hydraulic depressor 4 from a servo mechanism control section 9, and an actual measured value indicating the actual moved amount of the spool are accumulated in a data input section 12. Then, the correlation characteristic between the accumulated reference value and the actual measured value is determined by a data processing/calculation section 13. This correlation characteristic is graphically displayed in a display section 14, or is compared with an abnormality decision value of an abnormality decision section 15. Accordingly, a state of abnormality can be subjected to diagnosis through observation of the correlation characteristic, the load of the computer can be also reduced, and thus diagnosis can be performed on a real-time basis during the operation.
Inventors:
Hiroaki Eto
Kato Toyoki
Serikawa Japanese religion
Kato Toyoki
Serikawa Japanese religion
Application Number:
JP29630791A
Publication Date:
May 28, 1997
Filing Date:
October 16, 1991
Export Citation:
Assignee:
Nippon Steel Corporation
Taihei Kogyo Co., Ltd.
Taihei Kogyo Co., Ltd.
International Classes:
F15B20/00; F16K37/00; G05B23/02; (IPC1-7): F15B20/00; F16K37/00; G05B23/02
Domestic Patent References:
| JP5425377A | ||||
| JP58119009A | ||||
| JP6019207A | ||||
| JP63172004A | ||||
| JP63199986A |
Attorney, Agent or Firm:
Kokubun Takaetsu
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