JP2002073160A - Cause diagnosing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cause diagnosing device, with which the repeated execution of the same diagnosis is prevented when plant data show the repeating of the establishment/non-establishment of set conditions in a short time. SOLUTION: The plant data are collated with diagnosis start conditions and the conditions are established, that time is applied. Then, the lapse of time for diagnosis is calculated and only when that calculated time is longer than preset diagnosis block time, diagnostic data are outputted to diagnose a cause.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cause diagnosis apparatus for diagnosing the cause of an abnormality in a plant and displaying the diagnosis result.

[0002]

2. Description of the Related Art In recent years, various industrial plants are becoming more and more complicated with various control devices and the like in order to improve efficiency and operation reliability, and the number of operators involved in the operation tends to decrease. Under these circumstances, when an abnormality occurs in the plant, the signs of the abnormality are captured, the cause of the abnormality is diagnosed, and the diagnosis result is displayed, so that the operator can perform an appropriate response operation. Diagnosis device for the cause of has been made.

FIG. 8 shows the configuration of a conventional cause diagnosis apparatus. The cause diagnosis apparatus 1 is roughly composed of a cause diagnosis processing means 3 and a diagnosis result display processing means 5. In the cause diagnosis processing means 3, the event occurrence detection means 7 constantly monitors the state of the plant 9, and when the occurrence of any diagnostic target event is detected, the plant data collected from the plant 9 at that time is used as the diagnostic data. Delivered to the diagnostic means 11 to notify occurrence of an event.

The cause diagnosing means 11 makes a diagnosis based on the received diagnostic data and the diagnostic knowledge base 13 of the cause, saves the diagnosis result in a diagnosis result file 15, and diagnoses that one diagnosis has been completed. Result storage means 1
Notify 7.

The diagnostic result storage means 17 registers the diagnostic results stored in the diagnostic result file 15 in the diagnostic result storage file 19 of the diagnostic result display processing means 5, and informs the operator of the occurrence of a new diagnostic result. The notification is made via the notification means 21 such as a notification lamp.

The diagnostic result storage file 19 stores all diagnostic results obtained up to now.

The diagnostic result display processing means 5 comprises diagnostic information display data creating means 23, notifying means 21, and diagnostic display / input means 25, and the operator is notified by the notifying means 21 that a new diagnostic result has been generated. When the information is recognized and the display request of the information regarding the desired diagnosis result is instructed through the diagnostic display / input means 25, the diagnostic information display data creating means 2
3 extracts information on a desired diagnostic result from the diagnostic result storage file 19 and displays it on the diagnostic display / input means 25. As a result, the operator can check information on the desired diagnosis result.

On the other hand, a plant monitoring device 27 for providing monitoring information of the plant 9 collects plant data from the plant 9 and stores it in a monitoring data file 29. A monitoring display / input unit 33 for performing the monitoring data file 2 in response to a display request from the monitoring display / input unit 33
9 and monitoring information display data creating means 35 for creating display data of monitoring information by extracting desired data from the data.

As shown in FIG. 9, the event occurrence detecting means 7 of the conventional cause diagnosis apparatus comprises a plant data input means 41 and a setting condition judging means 43. Are collected, and based on the collected plant data d1, the setting condition determining means 43 determines whether or not an event to be diagnosed has occurred.

That is, the plant data input means 41
Collects the plant data d1 indicating the state of the plant 9 periodically, and the setting condition judging unit 43 stores the collected plant data d1 in the plant data storage unit 45 in synchronization with the plant data input unit 41. At the same time, by referring to the setting condition of the plant data set as the diagnosis start condition in the setting condition database 47 in advance, it is checked whether or not any of the collected plant data d1 satisfies the setting condition. Clock 49 in case
The time data d2 is taken in, and the collected plant data to which the time data is added is output to the cause diagnosing means 11 as the diagnostic data d3.

However, in the conventional cause diagnosis apparatus having such an event occurrence detecting means 7, the state of the plant 9 is unstable and the plant data is set to satisfy the set condition.
If the failure is repeated several times in a short time, the diagnosis is performed every time the set condition is satisfied, and the same diagnosis result is displayed on the display means in a short time, which may confuse the operator in some cases. was there.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention repeatedly performs the same diagnosis when plant data repeatedly satisfies or does not satisfy a set condition in a short time. It is an object of the present invention to provide a cause diagnosis device that prevents such a situation.

[0013]

That is, a cause diagnosis apparatus according to the present invention comprises a plant data input means for collecting plant data from a plant, and a setting condition for preliminarily storing a setting condition set as a diagnosis start condition for the plant data. The database and the collected plant data from the plant data input means are compared with the set conditions in the set condition database, and when the set plant condition data is present in the collected plant data, the time at that time is added to the collected plant data for diagnosis. A setting condition determination unit that outputs as data, and a diagnosis time when the previous setting condition is satisfied and a diagnosis block time that is set as a minimum elapsed time from the previous diagnosis time to the next diagnosis time are stored for each data of the collected plant data. Occurrence time file and diagnostic data output from the setting condition determination means Based on the preliminary occurrence time file,
Timing determination means for calculating the elapsed time from the previous diagnosis time for the data for which the set conditions are satisfied this time, and outputting the diagnosis data only when the calculated elapsed time is longer than a preset diagnosis block time; And a cause diagnosis unit for performing a cause diagnosis based on the diagnosis data output from the timing determination unit.

In a configuration for outputting diagnostic data to the cause diagnosing means, a timing determining means and an occurrence time file are provided to determine whether or not diagnosis is necessary for occurrence of an event of a plant which occurs a plurality of times in a short time. For the same event in which a predetermined time has not elapsed from the previous diagnosis time, the diagnosis data is not output to the cause diagnosis means. This can prevent the same diagnostic result from being displayed repeatedly.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. Note that the same reference numerals are given to portions common to the conventional example, and redundant description will be omitted.

FIG. 1 shows an embodiment of a cause diagnosis apparatus according to the present invention.

As shown in FIG. 1, the cause diagnosing apparatus according to the present embodiment is provided with a timing determining means 61 and an occurrence time file 63 as the event occurrence detecting means 7 in addition to the conventional configuration shown in FIG. .

That is, the cause diagnosis apparatus according to the present embodiment includes a plant data input means 41 for collecting plant data from the plant 9 and a setting condition database 47 in which setting conditions of the plant data determined to be an event are stored in advance. A setting condition judging unit 43 for judging whether a diagnostic event has occurred based on the setting condition database 47 for the plant data collected by the plant data input unit 41, and a diagnosis when the setting condition judging unit 43 judges that an event has occurred. A clock 49 for providing time data to the collected plant data as data; an occurrence time file 63 for storing a previous diagnosis time and a diagnosis block time when the setting condition is satisfied for each plant data number;
Diagnostic data and occurrence time file 6 output from 3
And timing judging means 61 for judging whether or not the same event has been diagnosed within a predetermined diagnostic block time based on No. 3 and outputting diagnostic data when the diagnostic block time has elapsed since the previous diagnostic time. Cause diagnosing means 1 for diagnosing the cause based on the diagnostic data output from event occurrence detecting means 7 and timing determining means 61
1 and a display / input means 25 for displaying a diagnosis result.

Next, the operation of this embodiment will be described.

The plant data input means 41 scans the state of the plant 9 in the order of predetermined data numbers up to the number N of data items, and collects plant data d as shown in FIG.
Edited to 1 and sent to the setting condition judgment means 43.

Upon receiving the collected plant data d 1, the setting condition judging means 43 refers to the setting condition database 47, compares the input values for the data numbers in the order of data numbers with the setting conditions in the setting condition database 47, and inputs the data. It is determined whether the value satisfies the setting condition.

Here, the data configuration of the setting condition database 47 is illustrated in FIG. In the setting condition database 47, setting values and setting conditions for data numbers are set in advance in the order of the plant data numbers. The setting condition is “1” if the value is equal to or more than the set value, and “0” if the value is smaller than the set value.
Shall be set. In the setting example shown in FIG. 3, the setting condition for the plant data with the data number 1 is “3000 or more” and the setting condition for the data number 3 is “less than 10000”.

The processing of the setting condition judging means 43 will be described with reference to the flowchart of FIG. First, upon receiving the collected plant data d1, the setting condition judging means 43 sets the data number counter i to "1" which is an initial value (step 430). The set value and the set condition for the data are read (step 431).

Next, the input value of the data number i is compared with the set value, and when the input value is equal to or larger than the set value, the comparison result is set to "1".
When the input value is less than the set value, the comparison result is set to “0” (step 432).

At step 433, when the comparison result is equal to the set condition, the time data d2 is collected from the clock 49, and the data number i at which the set condition is satisfied as shown in FIG. The diagnostic data d3 consisting of plant data is output (step 434).

When the comparison result is not equal to the set condition,
It is determined whether the data number counter i has reached the data number N (step 435). If not, the data number counter i is incremented by 1 (step 436), and step 43
It returns to the process of 1. The above process is repeated until the data number counter i reaches the final data number N.

The setting condition judging means 43 outputs the diagnostic data d3 as shown in FIG. 5 to the timing judging means 61 when the set condition is satisfied in the collected plant data d1 by the above processing.

The timing judging means 61 outputs the diagnostic data d
3 is received, the generation time file 63 is referred to, and FIG.
The necessity of diagnosis is determined according to the flowchart shown in FIG.

Here, the data structure of the occurrence time file 63 is illustrated in FIG. In the occurrence time file 63, the minimum time from the previous diagnosis time required to perform diagnosis for each data number of the plant data, that is, the diagnosis block time, is set in advance, and the previous setting condition is set for each data number. The time at which the diagnosis was made and the diagnosis was made is recorded.

In the example shown in FIG. 7, the previous diagnosis time and the diagnosis block time are composed of 14 digits, the year is 4 digits from the left, and the month is 2 digits.
Digits, days are indicated by two digits, hours are indicated by two digits, minutes are indicated by two digits, and seconds are indicated by two digits. Therefore, the previous diagnosis time for data number 2 is 13:17:26 on January 16, 1992, and the diagnosis block time is 1 minute. In this case, data number 2
The plant data of means that the diagnosis is not performed even if the set condition is satisfied, unless one minute or more has passed since the previous diagnosis time. In the initial state, for example, “99999999999999” is set as the previous diagnosis time.

As shown in the flow chart of FIG. 7, the timing determining means 61 determines the diagnostic data d as shown in FIG.
3 when receiving the data number i
In response to this, the occurrence time data consisting of the previous diagnosis time and the diagnosis block time registered in the occurrence time file 63 is read (step 610), and it is determined whether or not the previous diagnosis time is an initial value (step 611). If the previous diagnosis time is the initial value, the process proceeds to step 612, where the diagnosis data d3 is output to the cause diagnosis means 11 as a diagnosis start command, and at step 613 the previous diagnosis time in the occurrence time file 63 is changed to the time of the diagnosis data d3. And the process of the timing determination means 61 ends.

If it is determined in step 611 that the previous diagnosis time is not the initial value, the flow advances to step 614 to check the diagnosis data d.
Calculate the time difference (elapsed time after diagnosis) from the time of 3 and the previous diagnosis time. Next, the elapsed time after diagnosis is compared with the diagnosis block time (step 615). If the elapsed time after diagnosis is longer than the diagnosis block time, the process proceeds to step 612. If the elapsed time after diagnosis is shorter, the process of the timing determination unit 61 ends.

Thus, the timing determining means 61
When the same event occurs within a preset time, the diagnostic data d3 is not passed to the cause diagnostic means 11 so that the cause diagnosis is not performed.

The cause diagnosing means 11 performs a cause diagnosis based on the diagnosis data d 3 received from the timing judging means 61, and displays the diagnosis result on the display / input means 25.

As described above, in the present embodiment, the occurrence time file 63 in which the previous diagnosis time and the diagnosis block time are registered for each data number is provided. , The necessity of diagnosis is determined for the diagnostic data output from the setting condition determining means 43.

For example, if the event described here is an alarm generated in a power plant, an alarm is generated once due to the unstable state of the plant, and after resetting instantly, the same alarm is generated again in a short time. In this case, it is unlikely that the state of the plant greatly changes between the first alarm generation and the second alarm generation. That is, there is a high possibility that the same diagnosis result is output for the first and second alarm occurrences. If such a state is repeated a plurality of times, the cause diagnosis device will output the same diagnosis result many times. Conceivable.

However, according to the present embodiment, the same diagnostic result is output in a short time by cutting the diagnostic data indicating the same alarm output in a short time using the timing determination 61. Can be prevented.

Although the present embodiment has been described using an analog quantity as input data, even when digital quantity or data subjected to calculation processing (integration processing, differentiation processing, etc.) is used, a fixed amount is obtained from the previous diagnosis. Anything that blocks the time diagnosis of is included in the scope of the present invention.

[0039]

According to the present invention, the timing determination means 6
1 determines the necessity of diagnosis for the occurrence of an event in the plant 9 during a certain period of time while referring to the occurrence time file 63, thereby outputting the same diagnosis result many times in a short time. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a cause diagnosis apparatus according to the present invention.

FIG. 2 is a diagram showing a content configuration of collected plant data.

FIG. 3 is a diagram showing a data configuration of a setting condition database.

FIG. 4 is a flowchart illustrating a processing operation of a setting condition determination unit.

FIG. 5 is a diagram showing a content configuration of diagnostic data.

FIG. 6 is a flowchart illustrating a processing operation of a timing determination unit.

FIG. 7 is a diagram showing a data configuration of an occurrence time file.

FIG. 8 is a block diagram showing a conventional example of a cause diagnosis device.

FIG. 9 is a block diagram showing a conventional configuration of an event occurrence detecting means of the cause diagnosis device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cause diagnosis apparatus, 3 ... Cause diagnosis processing means, 5 ... Diagnosis result display processing means, 7 ... Event occurrence detection means, 9 ... Plant, 11 ... Cause diagnosis means, 13 ... Knowledge base for diagnosis, 1
5: diagnosis result file, 17: diagnosis result storage means, 19
... diagnosis result storage file, 21 ... notification means, 23 ... diagnosis information display data creation means, 25 ... diagnosis display / input means, plant monitoring device, 29 ... monitoring data file,
31: data collection means, 33: monitoring display / input means,
35 ... monitoring information display data creating means, 41 ... plant data input means, 43 ... setting condition determining means, 45 ... plant data storage unit, 47 ... setting condition database, 49 ...
Clock, 61: timing determination means, 63: occurrence time file,

Continued on the front page (72) Inventor Jun Yoshida 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in the Fuchu factory of Toshiba Corporation 2F076 BA14 BA16 BE04 BE05 BE12 5H223 AA01 DD03 EE30 FF08

Claims (1)

[Claims] 1. A plant data input unit for collecting plant data from a plant, a setting condition database for storing in advance a setting condition set as a diagnosis start condition for the plant data, and a collection plant from the plant data input unit. Setting data judging means for comparing the data with the setting conditions in the setting condition database, and when the collected plant data has the setting condition satisfaction data, adding the time at that time to the collected plant data and outputting as diagnostic data; An occurrence time file storing a diagnosis time at which the previously set conditions are satisfied for each data of the collected plant data and a diagnosis block time set as a minimum elapsed time from the previous diagnosis time to the next diagnosis time,
Based on the diagnostic data output from the setting condition determination means and the occurrence time file, the elapsed time from the previous diagnosis time is calculated for the data for which the current setting condition is satisfied, and the calculated elapsed time is set in advance. A timing determining unit that outputs the diagnostic data only when the diagnostic block time is longer than a certain diagnostic block time, and a cause diagnosing unit that performs a cause diagnosis based on the diagnostic data output from the timing determining unit. Diagnostic device.