JPH01274298A - Trouble diagnosis system - Google Patents

Abstract

PURPOSE:To shorten a diagnosis execution time and to improve an efficiency by deciding whether or not plant condition is normal and outputting a trouble diagnosis result based on the decision result and event data to be changed by the diagnosis execution. CONSTITUTION:A diagnosis result signal S6 from a diagnosis execution part 9 is transmitted to an event data value decision part 10, what the event data to be fixed by the diagnosis are and the data value are decided and transmitted to an event data control part 5 as an event data value decision signal S7. The value of the said event data of an event data storage part 6 is rewritten based on the signal S7 in the control part 5. Information to indicate the trouble event is transmitted from the control part 5 and the corresponding event data value is transmitted from the storage 6 to a normal condition decision part 12 respectively and a a normal/abnormal decision is executed. Event data S8 to be fixed by the diagnosis, said event data S10 and a plant condition decision result S9 are indicated in a diagnosis result indication part 11.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention acquires plant data from a plant to be diagnosed online at fixed time intervals, and performs failure diagnosis according to diagnostic rules for performing failure diagnosis. The present invention relates to a fault diagnosis system that performs diagnosis and outputs the diagnosis results on a display or the like.

(Prior art) In recent years, a fault diagnosis system has been developed that imports plant data from a plant to be diagnosed online at fixed time intervals, performs fault diagnosis according to diagnostic rules for fault diagnosis, and outputs the diagnosis results. used for diagnosis.

The configuration of a conventional system of this type is shown in FIG.

Information regarding blunt data necessary for failure diagnosis is registered in the plant data management section 1. The plant data collection unit 2 integrates the timer signal S1 from the timer 3, collects plant data S2 such as temperature, pressure, alarm signal, etc. according to the registered information of the plant data management unit 1, and collects the plant data S2 as a plant data value signal S3. Stored in the plant data storage section 4.

The event data management unit 5 registers information related to event data that expresses the status of each part of the plant used for failure diagnosis. "is false") is stored in the event data storage section 6.

Diagnostic rules for performing failure diagnosis are registered in the diagnostic rule registration/storage section 7. The diagnostic operation analysis unit 8 analyzes the diagnostic rules registered in the diagnostic rule registration/storage unit 7, information regarding plant data registered in the plant data management unit 1, and events registered in the event data management unit 5. The connection between each piece of data is investigated with respect to the information regarding the data, the diagnostic operation is analyzed, and the diagnostic operation signal S4 is transmitted to the diagnosis execution unit 9 based on the analysis result.

The diagnosis execution unit 9 integrates the timer signal S1 from the timer 3, and periodically integrates the plant data value signal S3 from the plant data storage unit 4 and the event data value signal from the event data storage unit 6 according to the diagnostic operation signal S4. S5 is imported and the diagnosis is executed. Then, a diagnosis result signal S6 is transmitted to the event data value determining section 10 as a diagnosis result.

The event data value determination section 10 determines the event data value based on the diagnosis result signal S6, and transmits it to the event data management section 5 as the event data value determination signal S7.

The event data management section 5 rewrites the corresponding event data value in the event data storage section 6 based on the event data value determination signal S7. Further, the event data management unit 5 transmits event data whose event data value has been determined in the current diagnosis and whose value has changed between the previous diagnosis and the current diagnosis to the diagnosis result display unit 11 as event data and signal S8. . The diagnosis result display section 11 receives the value of the event data together with the event data signal S8 from the event data storage section 6, and displays the event data value corresponding to the matter represented by the event data as a diagnosis result.

By the way, such a fault diagnosis system performs its functions by collecting plant data at regular intervals, executing diagnosis, and displaying a fault if an abnormality occurs in the plant. However, in order to prevent the displayed contents from remaining as a failure display when the plant recovers from a failure state to a normal state, a diagnostic rule is used to determine whether the plant is normal, in addition to the diagnostic rule that diagnoses the failure state of the plant. Diagnosis rule registration/
It was registered in storage section 7.

(Problems to be Solved by the Invention) As described above, in the conventional failure diagnosis system of this type, apart from the diagnosis rule for diagnosing the failure state of the plant in the diagnosis rule registration conflict storage section 7, there is a message indicating that the plant is normal. It was necessary to register diagnostic rules to determine this. For this reason, the number of diagnostic rules increases, and the memory capacity of the diagnostic rule registration/storage unit 7 has to become large, which is uneconomical, and the diagnostic execution time becomes long, resulting in poor efficiency.

Therefore, the present invention makes it possible to determine the normal state of a plant without registering diagnostic rules for determining whether the plant is normal, and by reducing the number of rules, memory capacity can be reduced and economical. It is an object of the present invention to provide a fault diagnosis system that can increase efficiency, reduce diagnostic execution time, and increase efficiency.

[Configuration of the Invention (Means for Solving the Problems) The fault diagnosis system of the present invention includes a plant data management means for importing and managing plant data necessary for fault diagnosis from a plant to be diagnosed, and a plant data management means for importing and managing plant data necessary for fault diagnosis from a plant to be diagnosed. An event data management means for managing event data and its values representing the status of each part as matters, a diagnostic rule management means for managing diagnostic rules for performing failure diagnosis, and a diagnostic rule managed by this diagnostic rule management means. Therefore, a diagnosis execution means that executes a diagnosis at a fixed time using plant data managed by a plant data management means and event data and its values managed by an event data management means, and determines and changes an event data value; Normal state determination means determines whether the plant state is in a normal state based on event data values corresponding to failure events among the event data managed by the data management means, and event data values are changed by the diagnosis execution means. The present invention is provided with a diagnosis result output means for outputting a failure diagnosis result based on the event data and its value and the determination result of the normal state determination means.

(Function) A fault diagnosis system that takes such a measure will have plant data managed by the plant data management means and event data managed by the event data management means at regular intervals according to the diagnosis rules managed by the diagnosis rule management means. Diagnosis is performed using the event data and its value, and the event data value managed by the event data management means is determined and changed. At this time, it is determined whether the plant state is in a normal state based on the event data value corresponding to the failure event among the event data managed by the event data management means, and the event data value is determined based on this determination result and diagnosis execution. A fault diagnosis result is output based on the changed event data and its value.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the system configuration of this embodiment. Note that the same parts as in FIG. 5 are given the same reference numerals. The failure diagnosis system of this embodiment includes a plant data management section 1 that registers information related to plant data such as temperature, pressure, and alarm signals taken from a plant to be diagnosed and manages the plant data; a timer 3 that measures time; Collected by the plant data collection unit 2, which integrates the timer signal S1 from the timer 3 and captures and collects plant data S2 from the plant according to the registered information of the plant data management unit 1. A plant data storage unit 4 that stores plant data values S3, an event data management unit 5 that registers information related to event data representing the status of each part of the plant used for failure diagnosis as matters, and manages event data; Event data storage unit 6 that stores values (“Undetermined,” “True to be a failure,” “False to be a failure”), and a diagnostic rule registration/storage unit to register and store diagnostic rules for diagnosing failures. 7. Diagnostic rules registered in the diagnostic rule registration/storage unit 7, information regarding plant data registered in the plant data management unit 1, and event data registered in the event data management unit 5. A diagnostic operation analysis section 8 examines the connection between each data and analyzes the diagnostic operation, integrates the timer signal S1 from the timer 3, and according to the diagnostic operation signal S4 from the diagnostic operation analysis section 8. The plant data value stored in the plant data storage section 4 is taken in as the plant data value signal S3, and the event data value stored in the event data storage section 6 is taken in as the event data value signal S5 at regular intervals to detect a failure. A diagnosis execution unit 9 that executes a diagnosis, an event data value determination unit 10 that determines an event data value according to a diagnosis result signal S6 from the diagnosis execution unit 9, and information regarding event data from the event data management unit 5 and the event data. a normal state determination unit 12 that determines whether the plant is normal based on event data values in the storage unit 6; information regarding event data in the event data management unit 5 and event data values in the event data storage unit 6; and the normal state determination section 12
A diagnosis result display unit 11 that displays plant diagnosis results based on a normal state determination signal S9 from the plant.

The event data management section 5 also has a function of taking in the event data value determination signal S7 from the event data value determination section 10 and rewriting the event data value stored in the event data storage section 6. ing.

FIG. 2 is a diagram showing the memory configuration of the plant data management section 1. As shown in the figure, the memory of the plant data management unit 1 stores each plant data item (TAGNAME) corresponding to the serial number, the data collection period (seconds) indicating the interval at which that item is collected, and the collection position. The collection points shown are stored as information about the plant data.

Note that the item rP1101J represents the pump (1) discharge pressure, the item PI201J represents the primary air temperature, and the item rLI301J represents the tank (1) level.

FIG. 3 is a diagram showing the memory configuration of the event data management section 5. As shown in FIG. As shown in the figure, the memory of the event data management unit 5 stores information on each event data item (data name) and whether or not the item is a failure event representing a failure in each part of the plant, corresponding to the serial number. information (in case of failure event - YES,
If it is not a failure event - No) is stored.

FIG. 4 is a diagram showing the memory configuration of the diagnostic rule/registration/storage section 7. As shown in FIG. As shown in the figure, the memory of the diagnostic rule registration/storage unit 7 stores diagnostic rules (rule descriptions) for diagnosing failures in correspondence with serial numbers.

Next, the operation of the system of this embodiment configured as above will be explained.

First, at an initial stage, an operator registers information regarding plant data necessary for plant failure diagnosis in the memory of the plant data management section 1 shown in FIG. The operator also registers information regarding event data representing the status of each part of the plant in the memory of the event data management section 5 shown in FIG. 3. At this time, the data value "undefined" is stored in the event data storage unit 6 in correspondence with each event data. Furthermore, the operator registers the diagnostic rule for executing the failure diagnosis in the memory of the diagnostic rule registration/storage section 7 shown in FIG. In this state, failure diagnosis of the plant to be diagnosed is started.

That is, the timer signal from the timer 3 is integrated in the plant data collection unit 2, and plant data is collected from collection points of information whose plant collection cycle matches the timer integration value among the registered information of the plant data management unit 1. The collected plant data values are then stored in the plant data storage section 4.

On the other hand, the diagnostic operation analysis section 8 collects information related to plant data registered in the plant data management section 1, information related to event data registered in the event data management section 5, and information registered in the diagnostic rule registration/storage section 7. The diagnostic operation is analyzed based on the connection between each data based on the diagnostic rule, and the analyzed diagnostic operation is transmitted to the diagnosis execution unit 9 as a diagnostic operation signal S4 together with the cycle of executing the diagnosis. .

The diagnosis execution unit 9 also uses the timer signal S from the timer 3.
1 is performed, and when the timer signal integrated value matches the diagnostic execution cycle of the diagnostic operation signal S4, the plant data value from the plant data storage section 4 and the event from the event data storage section 6 are calculated based on the corresponding diagnostic operation. Diagnosis is performed using the data values. Then, the diagnosis result is the diagnosis result signal S
6 and is transmitted to the event data value determination unit 10.

The event data value determination unit 10 determines what the event data confirmed in the current diagnosis is by the diagnosis result signal S6 and its data value (“true that it is a failure” or “false that it is a failure”). It is determined that the event data value determination signal S7
It is transmitted to the event data management section 5 as a.

The event data management section 5 rewrites the value of the corresponding event data stored in the event data storage section 6 based on the event data value determination signal S7 (for example, "undefined" = "true that it is a failure", " (Undetermined” → “False that it is a malfunction” etc.)
will be carried out. Note that this event data value rewriting is also performed during diagnosis execution in the diagnosis execution unit 9, and the rewritten values are sequentially used for diagnosis.

Then, after the event data value is rewritten by the event data management unit 5, information representing the failed event is extracted from the information related to the event data registered in the event data management unit 5 and transmitted to the normal state determination unit 12. At the same time, the corresponding event data value is also transmitted from the event data storage section 6 to the normal state determining section 12, and a normal/abnormal state determination is performed. That is, the normal state determination unit 12 determines that the state of the plant is normal if the event data values corresponding to all failure events are "undetermined" or "failure is false." , if even one of the event data values corresponding to the failure event is "true that it is a failure", the state of the plant is determined to be abnormal, and a determination result signal S9 is sent to the diagnostic result display section 11. .

The diagnosis result display section 11 displays the information regarding the event data confirmed in the current diagnosis sent from the event data management section 5, the value of the corresponding event data sent from the event data storage section 6, and the normal state determination. The plant status determination results sent from section 12 are taken in, and the diagnosis results indicate whether the plant status is normal or not, and which event data has been determined in this diagnosis and what its value is. Is displayed. However, at this time, the event data value information sent from the event data storage section 6 to the diagnosis result display section 11 is related to an event whose value has been determined in the current diagnosis and whose value has changed between the previous diagnosis and the current diagnosis. The determination result signal S9 sent from the normal state determination unit 12 is also limited to only those whose state has changed between the current determination and the previous determination. Therefore, if the current diagnosis has the same result as the previous diagnosis, the diagnosis result will not be sent to the diagnosis result display section 11.

In this way, in the system of this embodiment, if the event data values corresponding to all failure events are "undetermined" or "false as a failure" in the normal state determination unit 12, the plant The state of the plant is determined to be normal, and if even one of the event data values corresponding to the failure event is "true", the state of the plant is determined to be abnormal, and the judgment result is used for diagnosis. The results are displayed on the result display section 11. Therefore, even if a diagnostic rule for determining whether the plant is normal is not registered in the diagnostic rule registration φ storage unit 7, it is determined that the plant has returned to the normal state from an abnormal state and the fact that the plant is in the normal state is displayed. It can be output. Therefore, the number of diagnostic rules registered in the diagnostic rule registration/storage section 7 can be reduced, memory capacity can be reduced, and economical efficiency can be improved. Furthermore, since the number of rules is small, the diagnostic execution time can be shortened and efficiency can be improved.

In addition, although the case where the diagnostic result is outputted by display was shown in the said Example, it goes without saying that other output means, such as a printing means, may be used. It goes without saying that various other modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As described in detail above, according to the present invention, without registering a diagnostic rule for determining whether a plant is normal,
A fault diagnosis system that can determine the normal state of a plant, reduce the number of rules, reduce memory capacity, improve economic efficiency, and shorten diagnostic execution time to improve efficiency. Can be provided.

[Brief explanation of the drawing]

1 to 4 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a block diagram of the fault diagnosis system of this embodiment, and FIG. 2 is a memory formed in the plant data management section. FIG. 3 is a diagram showing the memory formed in the event data management section, FIG. 4 is a diagram showing the memory formed in the diagnostic rule registration/storage section, and FIG. 5 is a diagram showing the memory formed in the diagnostic rule registration/storage section. FIG. 2 is a block configuration diagram. DESCRIPTION OF SYMBOLS 1... Plant data management part, 2... Plant data collection part, 3... Timer, 4... Plant data storage part, 5... Event data management part, 6... Event data storage part , 7... Diagnostic rule registration/storage section, 8... Diagnostic operation analysis section, 9... Diagnosis execution section, 10... Event data value determination section, 11... Diagnosis result display section, 12.・・・
Normal state determination section. Applicant's agent Patent attorney Takehiko Suzue Figure 2 t53 Figure $1!4 Figure

Claims (1)

[Claims] A plant data management means that imports and manages plant data necessary for failure diagnosis from a plant to be diagnosed; an event data management means that manages event data and its values that represent the status of each part of the plant used for failure diagnosis; and A diagnostic rule management means for managing diagnostic rules for performing diagnosis, and plant data managed by the plant data management means at a fixed time according to the diagnosis rules managed by the diagnostic rule management means and the event data management means. diagnosis execution means for determining and changing event data values by executing diagnosis using event data and their values managed by said event data management means; and an event corresponding to a failure event among the event data managed by said event data management means. normal state determining means for determining whether or not a plant state is in a normal state based on data values; and event data whose event data value has been changed by the diagnosis execution means, its value, and the determination result of the normal state determining means. A failure diagnosis system comprising: a diagnosis result output means for outputting a failure diagnosis result.