EP0694825A2
Expired / Lapsed
EP
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Plant support system
Assignee: Mitsubishi Electric Corp
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Filing: 1995-07-25
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Granted: —
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Expires: 2015-07-25
Abstract
Abstract To enhance the efficiencies of constructing knowledge bases and making inferences and to understand the contents of a fault when it occurs, analyze the state of a fault and present high quality information easy to be handled by controlling and managing information relating to the execution of inferences. Hierarchical knowledge bases 8b which store plant information on the states of plant equipment and devices, media flowing through the plant and control instructions and a plant system diagram are used to make inferences for the detection of a fault in the plant, the identification of a faulty equipment and the cause of the fault in stages from an upper layer 51, and the results of these inferences are displayed. Further, a knowledge base of an upper layer 51 is synthesized from a knowledge base of a lower layer 55 to construct hierarchical knowledge bases 8b.
Inventors
- 👤 Shoichi C/O Mitsubishi Denki K.K. Uchihara
- 👤 Michihiro C/O Mitsubishi Electric Ishii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:58
CPC Classifications
G; G05; G05B; G05B23/00; G05B23/02; G05B23/0205; G05B23/0259; G05B23/0267; G05B23/0272; G05B13/00; G05B13/02; G05B13/0265; G05B13/028; G05B23/0218; G05B23/0243; G05B23/0245; G05B23/0251
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A plant support system for making inferences for the detection of a fault in a plant and the identification of a faulty equipment and the cause of the fault using knowledge bases (8, 8A, 8a, 8b, 8c) which store plant information on the states of plant equipment and devices, media flowing through the plant and control instructions and a plant system diagram, and for displaying the results of these inferences, characterized in that the plant support system comprises: - hierarchical knowledge bases (8b) for the identification of a faulty equipment using the plant system diagram; and - a hierarchical knowledge management unit (10) for managing the hierarchical knowledge bases (8b) and for processing the identification of a faulty equipment.
Claim 2
Dependent Claim
35 words
A plant support system according to claim 1, which further comprises means (4, 10) of making an inference for the identification of a faulty equipment in stages from upper layers (51) to lower layers (55).
Claim 3
Dependent Claim
41 words
A plant support system according to claim 1, which further comprises a graphics processing unit (6A) for displaying the process of inference that narrows down a range of faulty equipment over the displayed system diagram (19a) by changing colors or flickering.
Claim 4
Dependent Claim
125 words
A plant support system for making inferences for the detection of a fault in a plant and the identification of a faulty equipment and the cause of the fault using knowledge bases (8, 8A, 8a, 8b, 8c) which store plant information on the states of plant equipment and devices, media flowing through the plant and control instructions and a plant system diagram, and for displaying the results of these inferences, characterized in that the plant support system comprises: a knowledge base synthesis processing unit (11) for creating a knowledge base of an upper layer (51A) from a knowledge base of a lower layer (55A) by integrating information to construct hierarchical knowledge bases (8b) for the identification of a faulty equipment using the system diagram (19a).
Claim 5
Dependent Claim
35 words
A plant support system according to claim 4, which further comprises means of presenting the synthesized knowledge base of the upper layer (51) which stores a wide range of information as a ground for inference.
Claim 6
Dependent Claim
99 words
A plant support system for making inferences for the detection of a fault in a plant and the identification of a faulty equipment and the cause of the fault using knowledge bases (8, 8A, 8a, 8b, 8c) which store plant information on the states of plant equipment and devices, media flowing through the plant and control instructions and a plant system diagram, and for displaying the results of these inferences, characterized in that the plant support system comprises means (2, 3, 14, 16) of storing and managing collected plant process data and processing the data into time series data.
Claim 7
Dependent Claim
30 words
A plant support system according to claim 6, which further comprises means of performing recursive processing on collected plant process recorded data and making an inference using the recursive data.
Claim 8
Dependent Claim
130 words
A plant support system for making inferences for the detection of a fault in a plant and the identification of a faulty equipment and the cause of the fault using knowledge bases (8, 8A, 8a, 8b, 8c) which store plant information on the states of plant equipment and devices, media flowing through the plant and control instructions and a plant system diagram, and for displaying the results of inferences, characterized in that the plant support system comprises means (4, 5, 6A, 20) of presenting and relating the results of these inferences, an inference record (12, 13), data relating to inferences out of data before and after the occurrence of the fault, and display of the data trends with one another when inferences are made on layers when the fault occurs.
Claim 9
Dependent Claim
48 words
A plant support system according to claim 8, which further comprises means (4, 5) of relating the results of inferences, when a fault occurred in the past, with the inference record (12, 13) and inference data on the occurrence of the fault upon request and presenting these data.
References Cited (Backward Citations)
No citation records indexed.
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