US4947095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expert system of machine tool equipped with NC unit
Assignee: Fanuc Corp
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Filing: 1989-05-17
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Granted: 1990-08-07
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Expires: 2009-05-17
Abstract
Abstract Expert knowledge regarding investigation of the causes of various failures, and knowledge for extracting DI/DO information (IOD), which is exchanged by an NC unit (11) and a machine tool (13), as well as information (ITD) internally of the NC unit, is stored in a knowledge base (IB). When the contents of a failure are entered from an alarm detector (11g) upon occurrence of the failure, a reasoning mechanism (ADPR) uses the expert knowledge conforming to the failure to automatically extract the DI/DO information and information internally of the NC unit (IOD, ITB), ascertains actually occurring phenomena based on this information, recognizes the cause of the failure from these pheonomena, and displays the cause of the failure and a method of dealing with it.
Inventors
- 👤 Hideaki Kawamura
- 👤 Takao Sasaki
- 👤 Takashi Endou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:22
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/406; G05B19/4063; G05B2219/00; G05B2219/30; G05B2219/33; G05B2219/33303; G05B2219/33312; G05B2219/33318; G05B2219/33319; G05B2219/35; G05B2219/35291; Y; Y10; Y10S; Y10S706/00; Y10S706/902; Y10S706/911; Y10S706/912
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
An expert system of a machine tool equipped with an NC unit, characterized by provision of a knowledge base storing expert knowledge regarding investigation of causes of various failures, a reasoning mechanism for deducing the cause of a failure based on the expert knowledge stored in the knowledge base, and conversational means for inputting the expert knowledge to the knowledge base, deleting and modifying the expert knowledge, and for conversing with the reasoning mechanism when failure diagnosis is performed; wherein the knowledge base stores knowledge for extracting digital input/output information, which is exchanged by the NC unit and the machine tool, as well as information internally of the NC unit; the reasoning mechanism discriminating the causes of failures in the NC unit and machine tool based on said information automatically extracted by said expert knowledge when a failure occurs.
Claim 2
Dependent Claim
139 words
An expert system of a machine tool equipped with an NC unit, characterized by provision of a knowledge base storing expert knowledge regarding investigation of causes of various failures, a reasoning mechanism for deducing the cause of a failure based on the expert knowledge stored in the knowledge base, and conversational means for inputting the expert knowledge to the knowledge base, deleting and modifying the expert knowledge, and for conversing with the reasoning mechanism when failure diagnosis is performed; wherein the knowledge base stores knowledge for extracting digital input/output information, which is exchanged by the NC unit and the machine tool, as well as information internally of the NC unit; the reasoning mechanism discriminating the causes of failures in the NC unit and machine tool based on said information automatically extracted by said expert knowledge when a failure occurs.
Claim 3
Dependent Claim
48 words
An expert system of a machine tool equipped with an NC unit according to claim 1, characterized in that said expert knowledge includes data indicative of a correlation between several conceivable causes of a single failure and phenomena which actually occur in respective ones of the said causes.
Claim 4
Dependent Claim
50 words
An expert system of a machine tool equipped with an NC unit according to claim 2, characterized in that the reasoning mechanism discriminates actually occurring phenomena based on said extracted input/output information or information internally of the NC unit, and discriminates the cause of a failure based on said phenomena.
Claim 5
Dependent Claim
58 words
An expert system of a machine tool equipped with an NC unit according to claim 3, characterized by having an alarm detector for discriminating a failure which occurs during operation of the machine tool equipped with the NC unit, wherein the reasoning mechanism discriminates the cause of a failure based on expert knowledge conforming to said discriminated failure.
Claim 6
Dependent Claim
37 words
An expert system of a machine tool equipped with an NC unit according to claim 1, characterized in that the cause of a failure is discriminated upon adding a conversationally inputted phenomenon to said automatically discriminated phenomena.
References Cited (Backward Citations)
US4825394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |