JPS63300306A - Interactive diagnostic device - Google Patents

Abstract

PURPOSE:To attain quick and proper investigation of a cause of an abnormality by offering auxiliary information for the operator to its reply together with the execution of deduction. CONSTITUTION:Since the auxiliary information required to reply a question is outputted as to the questionnaire requiring much sophisticated professional intelligence for the reply in the process of progressing deduction by having interaction with the operator, the skillful operator can confirm its experience and the unskillful operator can easily reply the question. Since the auxiliary information is only outputted, the operator having the sophisticated professional intelligence can reply the question through the interactive device without looking into the information, and no waste of time is caused. Thus, efficient diagnosis is attained independently of the experience of the operator.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an interactive diagnostic device that diagnoses a plant through dialogue with an operator.

(Prior art) Conventionally, when an abnormality occurs in a plant, in order to diagnose the cause, fragmentary knowledge for solving diagnostic problems is accumulated in a storage device, and the fragmentary knowledge is used as a basis for diagnosing the cause. An interactive diagnostic device is known that uses an interactive device consisting of a CRT display, a keyboard, etc. to infer the diagnostic results while conducting a question-and-answer session with the operator.6 (Problems to be Solved by the Invention) However, ,Conventional interactive diagnostic devices created and outputted questions for people with a certain degree of specialized knowledge, so there were questions that inexperienced operators could not answer, making it difficult to perform a diagnosis. spend a lot of time. On the other hand, if you make the questions easy for even inexperienced people to answer.

This time, there was a problem in that for operators with a wealth of specialized knowledge, answering questions was troublesome and time was wasted.

Therefore, the present invention has the advantage that regardless of the depth of experience of Y1 transfers,
The purpose is to provide an interactive diagnostic device that enables efficient diagnosis.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a diagnostic knowledge storage device that stores a collection of fragmented knowledge for diagnosing abnormalities in a plant, and an interaction device that allows an operator to interact with the device via an interaction device. an inference device that makes inferences according to the contents of the diagnostic knowledge storage device while taking in necessary data at a timely manner; In order to incorporate
Information that controls the provision of auxiliary information by screen or voice corresponding to each question, which includes content that allows the operator to easily answer questions when a question is asked to the operator. Receives the stored auxiliary information control table and information about what question in the diagnostic knowledge storage device is currently being executed from the inference device.

An auxiliary information analysis unit that analyzes the contents of the auxiliary information control table corresponding to the above, and auxiliary information that stores double-sided and audio auxiliary information and edits the corresponding screen or audio according to the content analyzed by the 1wI auxiliary information analysis unit. It is equipped with a screen display device for displaying on a screen the contents edited by the editing section and the auxiliary information editing section, and an audio output device for outputting audio.

(Function) With the above configuration, in the process of making inferences through dialogue with operators, the auxiliary information necessary for answering questions that require a fairly high level of specialized knowledge is output, so it is possible to An experienced operator will be able to confirm, and an inexperienced operator will be able to answer the questions. If we attempt to perform inference in the form of questions that can be answered by anyone according to the conventional method without using this auxiliary information, the number of questions for operators will be extremely large, making it difficult for operators with highly specialized knowledge to do so. As mentioned above, it is extremely tedious for staff members to answer such questions, and an hour is wasted. In this regard, according to the configuration of the present invention described above, since only auxiliary information is displayed, an operator with highly specialized knowledge can answer questions through the dialogue device without looking at it, and no time is wasted. . This enables efficient diagnosis regardless of the operator's experience.

(Example) Hereinafter, an example will be described with reference to the drawings, taking as an example a case in which the present invention is applied to investigating the cause of an abnormality in the water supply system of a nuclear power plant.

FIG. 1 is a block diagram of a plant diagnosis device showing an embodiment of the present invention. 1 A diagnostic knowledge storage device 1 stores a series of knowledge necessary to investigate the cause of an abnormality. T
IIEN...(is)''. An example of a series of knowledge regarding water supply system abnormalities in the diagnostic knowledge storage device 1 is shown in FIG.

Table I in FIG. 2 contains knowledge regarding abnormality diagnosis of the water supply system, and is composed of production rules "IF-THIEN...". Table ■ is where attributes related to rules are defined, and attribute names and
It specifies the possible values of identification numbers and attributes. here,
"Attribute name" refers to the name before is in each rule of Table I, and "possible value of attribute" refers to the state after js. The table ■ specifies the content of the message when asking questions to the operator, and is defined for each identification number in the table ■.

In this way, 1 diagnostic knowledge storage bag M1 includes a table (■) for describing rules and a table (■) for defining attributes.

It consists of a table ■ that describes the contents of the message.

The inference device 2 shown in FIG. 1 searches the rules in the diagnostic knowledge storage device 1, and when an attribute that cannot be understood without questioning the operator appears, it displays the content of the question on the dialogue device 8, and also displays the content of the question on the auxiliary information analysis section. Notify the information to 3. The auxiliary information analysis unit 3 searches the auxiliary information control table 4 to see if an operation corresponding to the notified information is defined.

This auxiliary information control table 4 is stored in the diagnostic knowledge storage device l.
Define and store the action you want to perform when you want to simultaneously display some kind of auxiliary information, such as displaying past case studies or outputting normal valve sounds, when executing a question using the rules described in . It is. The contents of this auxiliary information control table 4 are as shown in FIG.
It consists of a rule number corresponding to Table I of the diagnostic knowledge storage device 1, an operation code that determines what kind of operation is desired to be executed, that is, single-screen display or audio output, execution timing, and specific commands.

As a result of searching this auxiliary information control table 4, if auxiliary information related to the question is defined, the information is notified to the corresponding auxiliary information editing section 5 according to the content. The auxiliary information editing section 5 selects the screen or audio information stored in advance that corresponds to the request, edits it, and displays the one-screen display device I! 6 or use the audio output device W! Output to 17.

With the above configuration, plant abnormality diagnosis is performed as follows. First, starting from a wide t1 area that roughly divides the plant, the cause of the abnormality is narrowed down to narrow areas that are subdivided into smaller areas based on the state changes of each part of the plant when an abnormality occurs.

If it becomes necessary to diagnose the operator during this process, a question-and-answer session is held through the dialogue device W18. That is, as shown in the processing flow of the inference device 12 in FIG.
First, I of rule 1 (Figure 2) of the diagnostic knowledge storage device M1
It is checked whether the first condition (T/D RFI'^ pump is stopped) of section F is satisfied. Here, “T/
``Possible values'' of the attribute ``D RFP A pump''
is not known, the reasoner M2 uses “T/D R
It is necessary to ask the operator about the value of the FPA pump''. Therefore, if there is a question (100), the question message identification number regarding the T/D RFP A pump in the table ■ of the diagnostic knowledge storage l!1. The contents of table ■ corresponding to ``Rule 1:01'', that is, ``T/D RF
"Please input the status of the P A pump" is displayed on the dialog device 8 (101), and if auxiliary information is defined in the auxiliary information control table 4 for this identification number, the corresponding operation is performed. Notify the auxiliary information analysis unit 3 of the identification number "Rule 1: Q1" to execute (
102). If there is any display output on the screen display M6 or the audio output device 7, the operator inputs an answer to the question displayed on the dialogue device W18 while referring to it.

The inference device 2 takes in this answer (103) and checks whether the condition is satisfied (104). If here, as the value of "'T/D RFP A pump"°,
If "operate" is input, the condition is not met and the process proceeds to check the next rule. If "stop" is input, then
This first condition is satisfied. Since there are still conditions to be checked in the IF section, the process returns to question (100) again to check the first condition. In this way, the condition checks for all IF sections are completed (105).
If all conditions are met, the inference device fi2
/-)Ll Execute the TIIEN part (result) (1
06).

In this way, the reasoning device M2 checks the conditions of all the rules, executes the TltCN part, etc., and writes one note.

Search for the cause of the failure. On the other hand, the auxiliary information analysis section 3 is an inference device! Upon receiving the identification number from 2, the process shown in FIG. 5 is executed. In other words, reasoning equipment! ! At 2 “T/DRFP A
When displaying a question about the attribute value of "Pump", the auxiliary information analysis section 3 is notified of the identification number "Rule 1: Ql" and takes in this identification number (200). In order to check whether the auxiliary information corresponding to the auxiliary information has been defined, access the contents of the auxiliary information control table 4 using the rule number "Rule 1" at the front of the identification number (201). If this rule number is If it does not exist (202), there is no auxiliary information regarding this rule, that is, no action is required, and the process ends.If this rule number exists (202), then execute this rule number. As a timing, check whether the ``Ql'' at the end of the identification number exists (203). If it does not exist (204), it means that there is no auxiliary information when asking this question, and nothing is done. It ends with. If it exists (204), it means that an action is required, and the type of action code is checked (205).

The operation code specifies either screen display or audio output. The meaning of the following commands differs depending on the action code, but first we will take an example of displaying the screen as an action. The command requires the number of the screen display device that displays the screen, the number of the screen that has already been registered, and the like. The auxiliary information analysis unit 3 notifies the corresponding auxiliary information editing unit 5 (in the case of screen display, the screen information editing unit) of the content of the command using the operation code (206).

The auxiliary information editing section 5 receives this information, takes out the screen information from an internal memory (not shown), edits the necessary screen, and outputs it to the single screen display device 6.

As an example, the third condition of the IF section of Rule 1 will be explained. Here, it is necessary to determine whether "the relationship between M/D RFP A Q-11 is normal" or not.

The operator is asked, "The relationship between M/D RFP A Q-H is normal." Here, for an operator who is familiar with the 0-11 curve that expresses pump performance, it is easy to understand whether the pump is normal or abnormal considering the current state of the pump, and this question can be easily answered.

However, those who do not know about the Rho 11 curve cannot answer this question without looking up some documentation. In such cases, if you try to write the rules with more foolproof questions, the number of questions for the operator will be too large, and it may not be effective for the operator who is familiar with the rules. There are also many.

In such a case, providing the "0-11 curve" itself to the operator as auxiliary information is for the operator who is familiar with it, to confirm it, and for the operator who is not familiar with it, to provide it to the operator so that they can answer the question. It is very effective in that it becomes Therefore, as the screen number 300 in the auxiliary information editing section 5, data of a 0-11 curve as shown in FIG. 6 is associated and stored in advance. When the inference device 2 displays a question asking about the attribute value of "M/D RFP A (1-1+ relationship"), the auxiliary information analysis unit 3 is notified of the identification number "Rule 1: Q3" and uses this identification number. The auxiliary information analysis unit 3 checks the contents of the auxiliary information control table 4 to check whether or not the auxiliary information corresponding to this identification number is defined.The auxiliary information control table 4 contains "Rule 1: Q3". Since the auxiliary information corresponding to " is defined, first check the operation code. Since code 01 for screen display is set as the operation code, the auxiliary information analysis unit 3 determines the meaning of the command by using the screen display device number. Analyze it as 01 screen number 300.

This information is notified to the auxiliary information editing section 5. The auxiliary information editing section 5 receives this information, takes out the screen information of screen number 300 from the internal memory, edits the ``1/D RFP A Q-11 curve'' as shown in FIG. Output.

Next, a case will be described in which audio output is performed as an auxiliary operation.

The command requires the number of the audio output device that outputs the audio, the number of the audio that has already been registered, and the like. The auxiliary information analysis unit 3 corresponds to the auxiliary information editing unit 5 (in the case of audio output, the audio information editing unit) depending on the operation code.
Notify the contents of the command to In the auxiliary information editorial department 5,
After receiving this information, the corresponding information is retrieved from the internal memory, the audio is edited, and the audio output device i! Output to 17.

As an example, the first condition of the IF section of Rule 3 will be explained. Here, it is necessary to determine whether "the sound of motor A is abnormal" or not, and the operator is asked to
"Is the sound normal?" is asked. Here,
For operating tools that know what kind of sound motor A makes when it is normal, they can easily tell whether the motor A is normal by comparing it with the current sound, and can easily answer this question. However, for those who have never heard the sound that motor A normally makes when it operates, this question cannot be answered unless you ask someone who is familiar with it. In such a case,
It is conceivable to display something like "Pakigini sound" in the question message, but expressing the sound in Chinese words is often vague and not very effective.Furthermore, we conducted frequency analysis. There is a method to determine whether it is abnormal or not, but doing frequency analysis for each motor in a large system would result in a very expensive system and is not practical.Therefore, as a rule description, It has to be like this, but at a time like this “′
Having the operator hear the "normal sound of motor A" itself as auxiliary information serves as a confirmation for the operator who is familiar with the system, and allows the operator who is unfamiliar with the system to be able to answer the question. is very effective.

Therefore, as the audio number 200 in the auxiliary information editing section 5, a recording of the sound of the motor A during normal operation is stored in association with the sound number 200 in advance. When the inference device 2 displays a question about the attribute value of the sound of the pamotor A, the auxiliary information analysis unit 3 is notified of the identification number parrule 3:Q1'' and takes in this identification number.

The auxiliary information analysis section 3 examines the contents of this identification information control table 4. Auxiliary information control table 4 contains "Rule 3:0"
Since the auxiliary information corresponding to "1" is defined, first check the operation code.Since code 02 for audio output is set as the operation code, the auxiliary information analysis unit 3 determines the meaning of the command by using the audio output device number. l, voice number 200, and notifies this information to the auxiliary information editing section 5.The auxiliary information editing section 5 receives this information and analyzes the voice number 200.

That is, ``normal B'' of motor A is edited and output to the audio output device 7.

This allows even operators without specialized knowledge to proceed with diagnosis easily and accurately.

[Effects of the Invention] As explained above, according to the present invention, in addition to the execution of inferences, auxiliary information for operators to answer questions is provided, so it is useful for operators with extensive specialized knowledge to use as a reference. This does not interfere with diagnosis, and for inexperienced operators, the necessary auxiliary information to answer questions is automatically obtained, making diagnosis easier and more accurate. This can be done by speeding up and making the investigation of the cause of the abnormality more accurate.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a diagnostic device according to an embodiment of the present invention, FIG. 2 is an internal configuration diagram of the diagnostic knowledge storage device of FIG. 1, and FIG. 3 is an internal configuration diagram of the auxiliary information control table of FIG. 1. , FIG. 4 is a flowchart of the processing of the inference device of FIG. 1, FIG. 5 is a flowchart of the processing of the auxiliary information analysis unit of FIG. 1, and FIG. 6 is an example of output to the screen display device of FIG. 1. It is an explanatory diagram. l...Diagnostic knowledge storage device, 2... Reasoning device, 3...
Auxiliary information analysis unit, 4... Auxiliary information control table, 5
... Auxiliary information editing department, 6... Screen display device, 7...
・Voice ratio horn device, 8...Dialogue device. Agent Patent Attorney Crest 1) Makoto 2nd WJ Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] An interactive type comprising a diagnostic knowledge storage device that stores a set of fragmentary knowledge for diagnosing plant abnormalities, and an inference device that makes inferences according to the contents of the diagnostic knowledge storage device through dialogue with an operator via an interaction device. In the diagnostic device, when a question is asked to the operator during the process of reasoning in the inference device according to the contents of the diagnostic knowledge storage device, a screen is provided to enable the operator to easily answer the question. Alternatively, an auxiliary information control table storing information for controlling the provision of auxiliary information by voice and information as to which question in the diagnostic knowledge storage device is being executed from the reasoning device; an auxiliary information analysis unit that analyzes the contents of the corresponding auxiliary information control table, stores the auxiliary information of the screen and audio, and edits the corresponding screen or audio according to the content analyzed by the auxiliary information analysis unit; An interactive diagnostic device comprising: an auxiliary information editing section; a screen display device that displays on a screen the contents edited by the auxiliary information editing section; and an audio output device that outputs audio.