Plant fault diagnosis system
First Claim
1. A plant fault diagnosing system, comprising:
- instrumentation means for providing process data representing physical operational characteristics of a plant process, diagnosing means for diagnosing faults in the plant in accordance with a relationship between said process data and at least one of predetermined information regarding fault diagnosis and a changeable reference value based on said process data, said diagnosing means including means for generating a diagnosing pattern which symbolically represents said process data;
means for displaying the diagnosis given by said diagnosing means;
a memory for storing said predetermined information and also for outputting said predetermined information to said diagnosing means, said predetermined information including importance factors which define the relative importance of the diagnosed faults;
said diagnosing means including means for estimating a first amount of time which will elapse between the diagnosis and the actual occurrence of each fault based upon the physical properties of the plant process and said process data, means for estimating a second amount of time required to avoid the occurrence of the fault, means for subtracting said second amount of time from said first amount of time to thereby calculate an estimated floating time available before a fault avoidance operation should begin, and means for calculating an urgency factor based on said estimated floating time and said importance factor; and
said displaying means including means for ranking and displaying the faults in sequential order based upon respective magnitudes of said urgency factor and said floating time.
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Abstract
The present invention relates to a plant fault diagnosing system for diagnosing the operating conditions of the plant, for example, change in the physical quantity or whether any fault is present in each of the instrumentations or not. This system makes reference and makes directly comparison the process data of the plant or a diagnosing pattern processed by treating the process data in a predetermined process with a predetermined information for detecting showing the symptom of an abnormality or a predetermined reference value. When any deviation from a predetermined allowable range or coincidence of the patterns is detected, it determines that there is any abnormality in the plant, and issues an alarm to, for example, an operator.
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Citations
14 Claims
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1. A plant fault diagnosing system, comprising:
- instrumentation means for providing process data representing physical operational characteristics of a plant process, diagnosing means for diagnosing faults in the plant in accordance with a relationship between said process data and at least one of predetermined information regarding fault diagnosis and a changeable reference value based on said process data, said diagnosing means including means for generating a diagnosing pattern which symbolically represents said process data;
means for displaying the diagnosis given by said diagnosing means; a memory for storing said predetermined information and also for outputting said predetermined information to said diagnosing means, said predetermined information including importance factors which define the relative importance of the diagnosed faults; said diagnosing means including means for estimating a first amount of time which will elapse between the diagnosis and the actual occurrence of each fault based upon the physical properties of the plant process and said process data, means for estimating a second amount of time required to avoid the occurrence of the fault, means for subtracting said second amount of time from said first amount of time to thereby calculate an estimated floating time available before a fault avoidance operation should begin, and means for calculating an urgency factor based on said estimated floating time and said importance factor; and said displaying means including means for ranking and displaying the faults in sequential order based upon respective magnitudes of said urgency factor and said floating time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- instrumentation means for providing process data representing physical operational characteristics of a plant process, diagnosing means for diagnosing faults in the plant in accordance with a relationship between said process data and at least one of predetermined information regarding fault diagnosis and a changeable reference value based on said process data, said diagnosing means including means for generating a diagnosing pattern which symbolically represents said process data;
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13. A fault diagnosing system for diagnosing faults in an operative target system, comprising:
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data collection means for collecting data representing a physical operational state of the target system; diagnosing means for interpreting said data and determining on the basis thereof whether said data indicates that a fault will occur in the target system, said diagnosing means including fault time estimating means for estimating a first amount of time which will elapse between said indication of said fault and an actual occurrence of said fault in the target system, avoidance time estimating means for estimating a second amount of time which will be required for taking corrective action to avoid the occurrence of said fault, and floating time estimating means for subtracting said second amount of time from said first amount of time to thereby calculate an estimated floating time available before said corrective action should begin; and display means for displaying faults indicated by said data, including ranking means for ranking said faults for display based on the magnitudes of their respective floating times. - View Dependent Claims (14)
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Specification