EP0424869A1
Expired / Lapsed
EP
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Fault diagnosing apparatus
Assignee: Komatsu Ltd
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Filing: 1990-10-23
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Granted: —
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Expires: 2010-10-23
Abstract
Abstract A fault diagnosing apparatus includes a fault tree, a storage section, a read control section, a display section, an update section, and a calculation/update section. The fault tree is designed such that a plurality of choices are set with respect to one question associated with the cause of a fault of a fault diagnosis target, answers and choices branch off from each of the choices, and choices in the final step respective reach causes of the fault. The storage section stores the probabilities of states of the respective choices on the basis of the selection result of each of the choices constituting the fault tree. The read control section reads out, in accordance with an input operation for selecting a choice, a question with respect to the selected choice, choices with respect thereto, and probabilities thereof. The display section displays the question, the choices, and the probabilities read out by the read control section. The update section updates the selected probability of the choice selected by the input operation. The calculation/update section calculates the probability of the state of the choice on the basis of the updated probability and updates the probability set before the calculation by using the calculation result.
Inventors
- 👤 Hiroshi Miyata
- 👤 Takeshi Ashikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 11:52
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/042; G05B19/0428; G05B2219/00; G05B2219/10; G05B2219/14; G05B2219/14058; G05B2219/30; G05B2219/33; G05B2219/33303
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
188 words
A fault diagnosing apparatus comprising: - a fault tree means (3) in which a plurality of choices are set with respect to one question associated with a cause of a fault of a fault diagnosis target, answers and choices branch off from each of the choices, and final choices reach causes of the fault; - storage means (3a) for storing probabilities of states of the respective choices on the basis of a selection result of each of the choices constituting said fault tree; - read control means (1b) for reading out, in accordance with an input operation for selecting a choice, a question with respect to the selected choice, choices with respect thereto, and probabilities thereof; - display means (4) for displaying the question, the choices, and the probabilities read out by said read control means; - update means (3) for updating the selected probability of the choice selected by the input operation; and - calculation/update means (3) for calculating a probability of a state of the choice on the basis of the updated probability and updating the probability set before the calculation by using the calculation result.
Claim 2
Dependent Claim
188 words
A fault diagnosing apparatus comprising: - a fault tree means (3) in which a plurality of choices are set with respect to one question associated with a cause of a fault of a fault diagnosis target, answers and choices branch off from each of the choices, and final choices reach causes of the fault; - storage means (3a) for storing probabilities of states of the respective choices on the basis of a selection result of each of the choices constituting said fault tree; - read control means (1b) for reading out, in accordance with an input operation for selecting a choice, a question with respect to the selected choice, choices with respect thereto, and probabilities thereof; - display means (4) for displaying the question, the choices, and the probabilities read out by said read control means; - update means (3) for updating the selected probability of the choice selected by the input operation; and - calculation/update means (3) for calculating a probability of a state of the choice on the basis of the updated probability and updating the probability set before the calculation by using the calculation result.
Claim 3
Dependent Claim
25 words
An apparatus to claim 1, further comprising error processing means for disabling said update means in response to an input operation and performing error processing.
Claim 4
Dependent Claim
28 words
An apparatus according to claim 1 or 2, further comprising means for canceling the selection of the choices until the final choices reach the causes of the fault.
Claim 5
Independent Claim
32 words
An apparatus according to any of claims 1 to 3, wherein the probabilities read out from said read control means are arbitrarily set and updated and are displayed in an arbitrary order.
Claim 6
Dependent Claim
168 words
A fault diagnosing method comprising the steps: - forming a fault tree in which a plurality of choices are set with respect to one question associated with a cause of a fault of a fault diagnosis target, answers and choices branch off from each of the choices, and final choices reach causes of the fault; - storing probabilities of states of the respective choices on the basis of a selection result of each of the choices constituting said fault tree; - reading out, in accordance with an input operation for selecting a choice, a question with respect to the selected choice, choices with respect thereto, and probabilities thereof; - displaying the question, the choices, and the probabilities read out by said read control means; - updating the selected probability of the choice selected by the input operation; and - calculating a probability of a state of the choice on the basis of the updated probability and updating the probability set before the calculation by using the calculation result.
Claim 7
Dependent Claim
168 words
A fault diagnosing method comprising the steps: - forming a fault tree in which a plurality of choices are set with respect to one question associated with a cause of a fault of a fault diagnosis target, answers and choices branch off from each of the choices, and final choices reach causes of the fault; - storing probabilities of states of the respective choices on the basis of a selection result of each of the choices constituting said fault tree; - reading out, in accordance with an input operation for selecting a choice, a question with respect to the selected choice, choices with respect thereto, and probabilities thereof; - displaying the question, the choices, and the probabilities read out by said read control means; - updating the selected probability of the choice selected by the input operation; and - calculating a probability of a state of the choice on the basis of the updated probability and updating the probability set before the calculation by using the calculation result.
Claim 8
Dependent Claim
24 words
A method according to claim 5, further comprising the steps of error processing including disabling said update means in response to an input operation.
Claim 9
Dependent Claim
29 words
A method according to claim 5 or 6, further comprising the step of canceling the selection of the choices until the final choices reach the causes of the fault.
Claim 10
Independent Claim
27 words
A method according to any of claims 5 to 7, wherein the probabilities read out are arbitrarily det and updated and are displayed in an arbitrary order.
References Cited (Backward Citations)
US4851985A
Cited
EP0292914A1
Cited
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