JP2000293217A - Plant diagnosis system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten time required for the take-in work of a signal value in a plant diagnosis system where an off line measuring signal value is taken in through a portable terminal. SOLUTION: At the time of diagnosing a plant based on an on line measuring signal measured in online in the plant and an off line measuring signal measured in off line, an off line measuring signal value is taken into a system by using a portable terminal 3. Thus, the precision of diagnosis is improved and a person inputting the off line measuring signal value is decided based on position information of a maintenance man in the plant. consequently, a take-in processing is speedily executed and a diagnosis result can speedily be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant diagnosis system for diagnosing a plant based on an online measurement signal measured online at a plant and an offline measurement signal measured offline, and more particularly to a system using a portable terminal. By taking offline measurement signal values into the system, the accuracy of diagnosis is improved, and the input processing of offline measurement signal values is determined based on the position information of maintenance personnel in the plant, so that the capture process can be performed. The present invention relates to a plant diagnosis system capable of performing a diagnosis promptly and promptly displaying a diagnosis result.

[0002]

2. Description of the Related Art In various plants including a power generation plant, a plant signal is constantly monitored to detect an abnormality at an early stage and to identify a cause of the abnormality based on a change tendency of the measured plant signal. A diagnostic system has been introduced. This is because the cause of the abnormality identified by the system is an important guideline for determining the operation of the plant when the abnormality occurs. At the time of occurrence of an abnormality, it is first determined to shift the plant to a safe state. For example, if the plant is forcibly stopped by a scrum or the like, the plant quickly shifts to a safe state. However, shutting down the plant with scrums is not always a good idea. In the case of minor abnormalities, it is not necessary to stop the plant.Conversely, in consideration of the economic loss caused by unplanned shutdown of the plant, operations such as continuing rated operation or switching to low-output operation May be the best.

As described above, various measures can be considered as an operation for avoiding an abnormality when an abnormality occurs in a plant. The plant diagnosis system detects an abnormality occurring in the plant, identifies the cause thereof, and provides it to the operator. The operator can determine a driving operation for avoiding the abnormality based on the cause of the abnormality identified by the system. Therefore, it can be said that the plant diagnosis system is effective in both safety and economy of the plant.

As a method for improving the diagnostic accuracy or performance of a plant diagnostic system, there is a method using both an online measurement signal and an offline measurement signal. The online measurement signal is a signal that can take a signal from a sensor online into a central computer and constantly check the measured value in a driver's cab. On the other hand, the off-line measurement signal is a signal that does not receive a signal from a sensor into a central computer, that is, a signal that uses a display panel installed at the site to confirm a measurement value. Compared to a plant diagnostic system that uses only online measurement signals, a system that uses both online measurement signals and offline measurement signals can provide more information to identify the cause of an abnormality, leading to improved diagnostic accuracy. Can identify the cause of the abnormality that could not be identified only with the online measurement signal.

[0005] However, when the plant diagnostic system takes in the off-line measurement signal value, human intervention cannot be avoided. For example, the following operation occurs for capturing the offline measurement signal value. First, when the system detects an abnormality in the plant and needs an off-line measurement signal value for diagnostic processing, an operator in the central control room checks a list of necessary signals through a terminal. Next, the operator requests a maintenance person at the site to transmit a signal value necessary for the diagnostic processing via a telephone or the like. The maintenance person reads the signal value from the display panel installed at the site and transmits the signal to the operator in the central control room using a telephone or the like. The operator inputs the signal value transmitted from the maintenance person to the system.

As described above, in order for the plant diagnostic system to capture the off-line measurement signal value, a list of necessary signals and a signal value read from the display panel are exchanged between the operator in the central control room and the maintenance staff on site. The task of verbal communication was necessary. For this reason, there has been a problem that errors are likely to occur in the process of transmitting information orally, and as a result, an erroneous diagnosis result may be presented. further,
For the operator, the work related to receiving the signal value from the maintenance staff and inputting it to the system occurs,
There was a problem that the monitoring of the plant status became sparse.

As a means for solving such a problem, there is a plant maintenance support device disclosed in Japanese Patent Application Laid-Open No. Sho 64-17105.
In the present invention, a maintenance person at the site exchanges data with a central computer using a portable terminal. In the plant,
Laying a wired network connected to the central computer,
Install input / output terminals at multiple locations on the network. The maintenance worker connects the mobile terminal to the input / output terminals, receives a list of offline measurement signals required by the system for diagnostic processing from the central computer via a wired network, and installs the maintenance staff at the site The signal value read from the displayed display panel is input to the portable terminal and transmitted to the central computer.

As described above, when a portable terminal is used,
Compared to verbal transmission of signal lists and signal values between operators and maintenance personnel using a telephone, etc., errors in transmission can be reduced, and signal values input by maintenance personnel through mobile terminals can be reduced. Since the data is taken directly into the system, the operator does not need to input signal values into the system.

[0009]

However, the above-mentioned Japanese Patent Application Laid-Open
With the plant maintenance support system according to No. 64-17105, even if an abnormality occurs in the plant and the system needs the offline measurement signal value for diagnostic processing, the maintenance personnel will notify the site by broadcasting or other means until the operator notifies the site by broadcasting. It was difficult to notice. For this reason, it took time for the maintenance staff to start inputting the signal value into the system. In addition, a plurality of maintenance personnel are scattered in the plant, and it is not clear which maintenance personnel should input the signal value, and there is a problem that a guideline for the input operation cannot be established. In particular, when there are a plurality of signal values that need to be input and the display panel is installed at a plurality of distant locations in the plant, it is preferable that the maintenance staffs share the work and input the signal values. And no guidance is available to determine who should be responsible for which signal.

The problem described above increases the time required to complete the work of inputting a signal value to the system, which causes a delay in the presentation of a diagnosis result. For this reason, it takes time for the operator to recognize the cause of the abnormality occurring in the plant, and as a result, the operation to deal with the abnormality is delayed. This leads to a decrease in driving reliability. Therefore, in a plant diagnosis system that performs a diagnosis using an off-line measurement signal, a system that can quickly capture a signal value has been desired.

[0011]

In view of the above problems, in the plant diagnostic system according to the present invention, a maintenance person has a portable terminal capable of exchanging data with the system via a wireless network. The mobile terminal outputs a message notifying the occurrence of an abnormality, a message notifying a request for inputting an off-line measurement signal value, or a list of off-line measurement signals requesting input of a signal value. In the portable terminal, the plant diagnostic system sequentially monitors whether or not these messages are output, and when the messages are detected, captures the messages and automatically displays the contents on a screen.

Thus, the maintenance staff at the site can recognize the occurrence of the abnormality using the portable terminal. For this reason, the operator can omit the operation of notifying the site of the occurrence of an abnormality using a broadcast or the like.

Further, in view of the above problems, the plant diagnostic system according to the present invention monitors the position of each maintenance person in the plant, and installs this position information and a signal value display panel for each offline measurement signal. By comparing the information with the position, the maintenance person to whom the signal value is to be input is determined for each signal. That is, the system determines the maintenance person who is closest to the display panel as the input person. The maintenance staff at the site confirms information on the input person determined by the system through the mobile terminal.

With this arrangement, a maintenance person to be input is assigned to each signal, so that even if display panels for signal values required to be input are installed at a plurality of distant places in the plant, each display is displayed. A plurality of maintenance personnel close to the panel can be determined as input persons.

[0015] Therefore, the plant diagnostic system can quickly take in the off-line measurement signal value,
The diagnosis result can be promptly presented to the operator. As a result, the operator can quickly perform an operation corresponding to the abnormality,
Operational reliability is improved.

[0016]

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

FIG. 1 is a plant diagnostic system according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a diagnostic processing apparatus that performs a plant diagnostic process such as abnormality detection and identification of a cause of abnormality based on a measurement signal value in the plant. Reference numeral 2 denotes a plurality of sensors installed in the plant. Some of the measurement signals measured by the sensors are periodically taken into the diagnostic processing device 1 online, and others are those that read the measured values through a display panel installed at the site. The former measurement signal is called an online measurement signal, and the latter is called an offline measurement signal. Here, the sensor 2 in FIG. 1 indicates a sensor for measuring an online measurement signal. Reference numeral 3 denotes a maintenance person who walks around the plant and performs maintenance and inspection of the components. The maintenance staff has a mobile terminal with support software for maintenance work. The support software is equipped with a display function for inspection items for each device, and a data input / save function. Reference numeral 4 denotes a display device for presenting diagnostic information output from the diagnostic processing device 1 to an operator in the central control room.

Next, the configuration of the diagnostic processing device 1 will be described. Reference numeral 11 denotes a measured value capturing unit that captures the measured value of the sensor 2. Reference numeral 12 denotes a measured value database that stores the measured values captured by the measured value capturing unit. Measurement value database 1
In 2, the measured value is overwritten. Therefore, only the instantaneous values are stored in the measurement value database 12. Reference numeral 13 denotes an abnormality determination unit that detects an abnormality that has occurred in the plant and further determines the cause of the abnormality based on the measured value of the plant signal stored in the measured value database 12. Reference numeral 14 denotes a diagnostic knowledge database that stores diagnostic knowledge for the abnormality determination unit to perform abnormality detection and further determine the cause of the abnormality. Reference numeral 15 denotes a display control unit that controls display of diagnostic information, which is output data of the abnormality determination unit, on the display device 4. Reference numeral 16 denotes a data transmission / reception unit that receives data from the portable terminal of the maintenance staff and transmits data to the portable terminal. Reference numeral 17 denotes a maintenance staff position monitoring unit that identifies and monitors the current locations of maintenance staff scattered at a plurality of locations in the plant.

Hereinafter, the flow of processing in the apparatus according to the embodiment of the present invention will be described.

The measured values measured by the sensors 2 installed at a plurality of locations in the plant are taken online by a measured value taking section 11 and stored in a measured value database 12. FIG. 2 shows the configuration of the measurement value database 12. The measurement value database 12 is composed of two parts, one for storing an online measurement signal and the other for storing an offline measurement signal, each of which pairs a signal ID and a signal value. The signal ID is an ID assigned to each measurement signal measured by each sensor.

In the present apparatus, all the measurement signals in the plant are managed by the signal ID. Signal ID of online measurement signal
Has a format that begins with "A" or "D" as shown, followed by a number. "D" is a digital signal,
“A” represents an analog signal. A digital signal refers to a signal having only two states indicated by signal values. For example, there are a signal indicating opening / closing of a valve, a signal indicating ON / OFF of an alarm, and the like. On the other hand, an analog signal is a signal in which the state indicated by the signal value is continuous. For example, there are signals representing flow rate, pressure, and temperature. By setting the format of the signal ID as described above, the analog signal /
Digital signals can be distinguished. The measurement value capturing unit 11 captures a signal value measured by the sensor 2 for the online measurement signal, and stores the signal value in the measurement value database 12.

For the online measurement signal, the signal ID of the offline measurement signal starts with "ZD" or "ZA".
“ZD” indicates a digital signal among the offline measurement signals, and “ZA” indicates an analog signal among the offline measurement signals. In the case of an off-line measurement signal, the signal value is not always stored in the system. If the system is not capturing offline measurement signal values,
In the measurement value database 12, "ND (No
Data) ". Normally, all the offline measurement signal values are “ND”. As for the offline measurement signal, the data transmission / reception unit 16 performs storage processing instead of the measurement value acquisition unit 11 storing the signal value in the measurement value database 12 as in the case of the online measurement signal. The storage processing of the offline measurement signal will be described later.

The abnormality judging section 13 shown in FIG. 1 detects an abnormality in the plant and judges the cause of the abnormality based on the signal values stored in the measured value database 12. In normal times, that is, when the plant is normal, the abnormality determination unit 13 performs the abnormality detection process using only the online measurement signal among the signal values stored in the measurement value database 12. That is, the off-line measurement signal is not normally used for the diagnostic processing.

The abnormality judging section 13 detects an abnormality of the plant,
When performing a diagnosis process such as determination of an abnormal cause, the diagnosis knowledge stored in the diagnosis knowledge database 14 is referred to. An example of diagnostic knowledge is shown in FIG. FIG. 3 shows the knowledge about the seal portion of the water supply pump, which is one of the components of the plant.

As shown in the figure, the diagnostic knowledge database 14 stores diagnostic knowledge in a table format for each device or for each component of the device. This table is called a decision table. At the decision table,
Describe the change pattern of the plant signal for each cause of abnormality. In the figure, reference numeral 301 denotes a table number assigned to each decision table. The number manages the decision table. 302 is the name of the measurement signal. 303 is a signal ID of the measurement signal. Signal I
D is the same as that in the measurement value database 12 described above. 304 is a rated value of the measurement signal. 3
Reference numeral 05 denotes upper and lower threshold values in a threshold value determination process performed on an analog signal among the measurement signals. For example, in the case of the measurement signal “water supply pump seal water temperature”, 50
"High" if the temperature is above ℃ and "Low" if the temperature is below 30 ℃
And In diagnostic knowledge, upper and lower threshold values are set only for analog signals, and the signal value "1/0" is used for digital signals as they are.
306 is the cause of each abnormality. The cause of the abnormality described in the decision table shown in the figure covers only the abnormality that has occurred in the seal portion of the water supply pump.

The determination of abnormality is performed by a matching process between the change pattern of the measurement signal and the change pattern described in the decision table. This processing is performed by the abnormality determination unit 13 in FIG. FIG. 4 shows the configuration of the abnormality determination unit. Hereinafter, the processing in the abnormality determination unit 13 will be described with reference to the drawings.

The matching processor 44 outputs the table number of the decision table corresponding to the device or component to be diagnosed to the data fetcher 41. Here, the order of the devices or components to be diagnosed, that is, the order of the decision table for performing the matching process is determined in advance. The data capturing unit 41 refers to the decision table corresponding to the table number transmitted from the matching processing unit 44 in the diagnostic knowledge database 14. As shown in FIG. 3, in the decision table,
The signal ID of the measurement signal used for the matching processing is written. The data capturing unit 41 stores the measured signal value corresponding to the signal ID of the decision table in the measured value database 1.
2 and output to the measurement pattern storage unit 42. At this time, the signal values are written in the same manner as the arrangement of the signal IDs in the decision table. In the case of an online measurement signal, the signal value is sequentially written to the measurement value database 12, and the current value can always be obtained. However, in the case of the offline measurement signal, the signal value is not stored in the database,
It is “ND”. Even in such a case, the data capturing unit 41 of the abnormality determination processing unit 13 writes "ND" in the measurement pattern storage unit 42.

When the writing of the measured values into the measurement pattern storage section 42 is completed, the data capturing section 41 outputs a write completion signal to the matching processing section 44. Next, upon receiving this signal, the matching processing unit 44
The measurement value stored in the measurement pattern storage unit 42 is read, and whether or not an abnormality has occurred is confirmed. However, only the online measurement signal is monitored. The matching processing unit 44 determines whether the on-line measurement signal value is not out of the upper and lower limit thresholds written in the decision table for the analog signal, and is the same as the rated value for the digital signal. It is determined whether there is. If all the online measurement signal values indicate normal values, the matching processing unit 44 performs a diagnosis process for the next device or component.

On the other hand, of the online measurement signals,
If at least one of them indicates an abnormal value, the process of determining the cause of the abnormality described below is started.

First, the matching processing unit 44 in FIG. 4 checks the presence or absence of unmeasured data, that is, “ND” in the signal values stored in the measurement pattern storage unit 42. At this time, when "ND" is found, a process for acquiring the offline measurement signal corresponding to "ND" is performed. The matching processing unit 44 outputs the table number of the decision table currently being diagnosed to the data requesting unit 43. When receiving the table number from the matching processing unit 44, the data requesting unit 43 refers to the decision table of the diagnostic knowledge database 14 and
The signal I of the off-line measurement signal that is “ND” in 2
Get D. For example, “ZA154” and “ZA155” correspond to the example of the decision table in FIG.
Next, the data requesting unit 43 obtains one or more signal IDs.
Is output to the data transmission / reception unit 16 shown in FIG.

The data transmitting / receiving unit 16 outputs the transmitted signal ID to the maintenance staff position monitoring unit 17. FIG. 5 shows the configuration of the maintenance staff position monitoring unit. Data transmission / reception unit 16
The signal ID sent from is input to the input person determination unit 51. The input person determination unit 51 uses data stored in the three databases to determine the input person of the offline measurement signal value corresponding to the transmitted signal ID. One is a maintenance staff position database 52. This configuration is shown in FIG. The maintenance staff position database 52 stores each maintenance staff and the current location of each maintenance staff. This data is
Since the maintenance person position identification unit 55 described later updates sequentially,
Always show the latest location information. Next, the configuration of the display panel position database 53 is shown in FIG. This database contains
The signal ID of the offline measurement signal and the installation location of the display panel of the measurement value are stored.

Next, the configuration of the room position database 54 is shown in FIG. In this database, rooms close to each room are stored in order in each room. However, the first stores the same room name. For example, in FIG. 8, as a room close to “the east side of the basement floor of the turbine building”,
The second is "the east side of the first floor of the basement of the turbine building", and the second is "the west side of the first floor of the basement of the turbine building".

Based on the three databases described above, the input person determining unit 51 determines a maintenance person who is most suitable for the operation of reading the signal value for each of the acquired signal IDs and the operation of inputting to the system. In the apparatus according to the present embodiment, the optimal maintenance person is the maintenance person who is closest to the display panel of the offline signal value requested by the system. Usually, a plurality of maintenance workers are scattered in a plant to perform maintenance work.
At this time, if the plant diagnosis system needs an off-line measurement signal value to detect a plant abnormality and further determine the cause of the abnormality, it is necessary to immediately take in the signal value. The reason is that the system can promptly present the diagnosis result to the operator, so that the operation for responding to the abnormality can be quickly performed. In order to reduce the time required for maintenance personnel to input the offline measurement signal value to the system, the maintenance personnel who is closest to the display panel rushes to the installation location of the display panel and enters the offline measurement signal value input work. Is preferably performed.

The input person determining section 51 receives the signal ID
In order to determine the maintenance person who is closest to the display panel of the signal value corresponding to the following, the following processing is performed. First, referring to the display panel position database 53, the installation location of the display panel corresponding to the acquired signal ID is checked. For example, in FIG. 7, it can be seen that the display panel of the signal value corresponding to the signal ID “ZA001” is “on the east side of the first floor of the basement of the turbine building”. Next, the input person determination unit 51 refers to the room position database 54,
Investigate a room near the display panel installation location. In the example of FIG.
The room closest to the installation location of the sensor “the east side of the first floor of the basement of the turbine building” is “the east side of the first floor of the basement of the turbine building” (as described above, the first room is the same in all the rooms). Next, the input person determination unit 51 refers to the maintenance staff position database 52 and checks whether there is any maintenance staff on the “east side of the basement floor of the turbine building” acquired as the room closest to the installation location of the display panel. If so, the corresponding maintenance person is determined as the input person. If there is no room, the room position database 54 is referred to again, and the second closest room is checked. In the example of FIG. 8, it is “the west side of the first basement floor of the turbine building”. The input person determination unit 51 again refers to the maintenance staff position database 52 and checks whether there is any maintenance staff in this room. If so, the corresponding maintenance person is determined as the input person. If not, the third closest room is obtained from the room position database 54 in the same manner. Hereinafter, the same processing is repeated until the input person is determined.

Next, the processing of the maintenance person position identification unit 55 in the same maintenance person position monitoring unit 17 will be described. The maintenance person position identification unit 55 identifies the current position of each maintenance person in the plant, and sequentially writes the position information in the above-mentioned maintenance person position database 52. Below, the maintenance staff position identification unit 5
The position identification processing of No. 5 will be described.

The maintenance person carries a PHS radio transmitter so that the plant diagnosis system can obtain position information. The radio wave output from the transmitter is received by a PHS receiving antenna 57 installed in each room in the plant. The maintenance person position identification unit 55 measures the strength of the radio wave received by each antenna for each maintenance person, and determines which antenna receives the strongest radio wave. That is, the installation location of the antenna receiving the strongest radio wave is the current position of the maintenance staff. The maintenance person position identification unit 55 determines the antenna that has received the strongest radio wave, and converts the antenna to a room position by referring to the antenna position database 56. As shown in FIG. 9, the antenna location database 56 stores the installation locations of each antenna.

Upon receiving one or more signal IDs from the data transmission / reception unit 16, the maintenance staff position monitoring unit 17 identifies the maintenance staff who is closest to the signal value display panel for each signal ID by the above processing. judge. FIG. 10 shows an example of the input person assignment information sent from the maintenance staff position monitoring unit 17. For each signal ID output by the data transmission / reception unit 16 to the maintenance personnel position monitoring unit 17, the installation position of the signal value display panel and the maintenance personnel who should perform the input operation of the signal value are described. Upon receiving this information, the data transmitting / receiving unit 16
A signal for notifying the request for inputting the offline measurement signal value is transmitted to the portable terminal of the maintenance person assigned with the input of the signal value. At this time, the signal ID assigned to the maintenance staff and the installation position of the display panel are also transmitted according to the input user assignment information. That is, in the example of FIG. 10, the signal for notifying the request for input of the offline measurement signal to the system and the IDs “ZA005” and “ZA01” of the offline measurement signal to be input by the maintenance worker 1 are provided to the mobile terminal of the maintenance worker 1.
0 "and the installation position of the display panel" east side of the basement floor of the turbine building ".

Normally, maintenance personnel record maintenance data using a portable terminal. At this time, the portable terminal constantly monitors whether data is transmitted from the data transmitting / receiving unit 16. When the data transmitting / receiving unit 16 transmits the above data, the mobile terminal detects the data, and captures the data, a display as shown in FIG. 11 is performed on the display screen of the mobile terminal. First, a message prompting the user to input a signal value to the system is displayed on the screen as shown in FIG. At this time, there is also a method of using a sound effect or the like so that the maintenance person notices the displayed message. On the screen, the user is asked whether input work of the signal value is possible. If for some reason it is not possible to start the input operation, "NO" on the screen is designated. This information is sent to the data transmitting / receiving unit 16. The data transmission / reception unit 16 determines a maintenance person next to the display panel as an input person, and performs the display shown in FIG.

On the other hand, if the input operation is possible, "YES" on the screen is designated, and the input operation is started.
If "YES" is designated, a list of signals to be input is displayed on the screen as shown in (b). This is obtained by converting the signal ID sent from the data transmitting / receiving unit 16 into a signal name. The correspondence table between the signal ID and the signal name is mounted in the mobile terminal in advance. The maintenance person moves to a location on the display panel where the value of the signal requested to be input can be confirmed, reads the signal value, and inputs the signal value to the portable terminal. When the maintenance person finishes inputting all the signal values in the input request signal list to the mobile terminal, the mobile terminal transfers the signal ID and the input data to the data transmission / reception unit 16.

When the data transmission / reception section 16 of FIG. 1 receives the signal ID and the input data from the portable terminal, it writes them into the measurement value database 12. As shown in FIG. 2, a storage location of the offline measurement signal is prepared in the measurement value database 12, and a signal value input by a maintenance person is stored in a corresponding signal ID column. The data transmission / reception unit 16 completes the process of taking in the signal values and storing the signal IDs in the measurement value database 12 for all of the signal IDs sent from the abnormality determination unit 13,
To the end of data storage processing.

In the abnormality determination section 13, this signal is
Is received by the data request unit 43 shown in FIG. Next, the data requesting unit 43 notifies the data capturing unit 41 that the process of storing the offline measurement signal in the measurement value database 12 has been completed. In the data capturing unit 41,
In response to this notification, the off-line measurement signal value is fetched from the measurement value database 12 and the measurement pattern storage unit 42
Output to

Through the above processing, all the unmeasured data contained in the measured pattern storage section 42 is measured and stored as data. The data capturing section 41 notifies the matching processing section 44 that the data capturing processing has been completed. Upon receiving this notification, the matching processing unit 44 fetches data from the measurement pattern storage unit 42,
A matching process is performed with a change pattern of a signal value for each cause of abnormality described in the decision table to be diagnosed to determine the cause of the abnormality. Abnormality determination unit 13
Outputs the determination result to the display control unit 15 when determining the cause of the abnormality.

The display control unit 15 takes in the judgment result sent from the abnormality judgment unit 13 and displays the judgment result on the display device 4. The operator recognizes, through the display device 4, a diagnosis result such as an abnormal cause determined by the plant diagnosis system, and uses the result as a guideline of the operation.

As described above, the plant diagnosis system according to the present invention monitors the state of the plant based on the online measurement signal. At this time, if an offline measurement signal value is required to detect the abnormality and determine the cause of the abnormality, a message is output to the portable terminal of the maintenance staff to prompt the user to input the offline measurement signal value. .

Thus, even if the operator in the central control room does not notify the on-site maintenance staff of the occurrence of an abnormality using a broadcast or the like, the maintenance staff can immediately start inputting the signal value. Can be. For this reason, it is possible to shorten the time from when the system detects the abnormality to when the maintenance staff starts the operation of inputting the signal value, and the operator eliminates the work associated with the notification to the maintenance staff at the site. Therefore, it is possible to concentrate on monitoring the state of the plant after the occurrence of the abnormality.

Further, the plant diagnosis system according to the present invention is based on the position information of each maintenance person in the plant identified by using the PHS or the like and the position information of the display panel of the signal value requested by the system. Then, the maintenance person closest to the display panel is determined as the input person. At this time, even when there are a plurality of signal values for which input is required and the display panels are also present at a plurality of distant places in the plant, the system can assign a maintenance person to each display panel.

Thus, the system can automatically assign maintenance personnel who perform signal value input operations, and the maintenance personnel can check this information through the portable terminal.
The work of capturing the signal value can be performed quickly. Therefore, the system can promptly present a highly accurate diagnosis result determined using both the online measurement signal and the offline measurement signal. Further, in the present embodiment, the input person is determined by comparing the position information of the maintenance staff and the position information of the display panel of the sensor. However, the same applies not only to the position of the display panel of the sensor, but also to the installation location of the sensor. Can be performed.

[0048]

According to the present invention, in a plant diagnosis system in which the diagnostic accuracy is improved by using both the online measurement signal and the offline measurement signal for diagnosis, the input operation of the offline measurement signal value to the system by the maintenance staff at the site can be promptly performed. Therefore, the diagnosis result can be promptly presented to the operator. For this reason, the operator can quickly perform the operation for responding to the abnormality.

Therefore, according to the present invention, the effect of improving the safety and reliability of the plant can be expected.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a configuration of a measurement value database.

FIG. 3 is a diagram illustrating an example of diagnostic knowledge.

FIG. 4 is a diagram illustrating a configuration of an abnormality determination unit.

FIG. 5 is a diagram illustrating a configuration of a maintenance staff position monitoring unit.

FIG. 6 is a diagram showing a configuration of a maintenance staff position database.

FIG. 7 is a diagram showing a configuration of a display panel position database.

FIG. 8 is a diagram showing a configuration of a room position database.

FIG. 9 is a diagram showing a configuration of an antenna position database.

FIG. 10 is a diagram showing input person assignment information.

FIG. 11 is a diagram illustrating a display example of the portable terminal.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Diagnosis processing device, 2 ... Sensor, 3 ... Maintenance staff and a portable terminal, 4 ... Display device, 11 ... Measured value acquisition part, 12 ... Measured value database, 13 ... Abnormality judgment part, 14 ... Diagnostic knowledge database, 15 ... Display control unit, 16 ... Data transmission / reception unit,
17: Maintenance personnel position monitoring unit, 41: Data acquisition unit, 42
... Measurement pattern storage unit, 43 ... Data requesting unit, 44 ... Matching processing unit, 51 ... Input person determination unit, 52 ... Maintenance staff position database, 53 ... Display panel position database, 54
… Room position database, 55… maintenance staff position identification unit, 5
6: Antenna position database, 57: PHS antenna.

Claims (4)

[Claims] In a plant diagnosis system for diagnosing a plant based on an offline measurement signal measured offline in addition to an online measurement signal measured online in the plant, the plant diagnosis system needs the value of the offline measurement signal. In this case, a request is made to input the value of the offline measurement signal to the display screen of a portable terminal carried by a person who is a candidate for inputting the value of the offline measurement signal to the plant diagnosis system. A plant diagnostic system wherein a message is automatically displayed by the plant diagnostic system. 2. The plant diagnostic system according to claim 1, wherein a list of off-line measurement signals requiring input of signal values to the plant diagnostic system is displayed on a display screen of the portable terminal. Diagnostic system. 3. The plant diagnostic system according to claim 1, wherein the value of the off-line measurement signal is input to the plant diagnostic system through a portable terminal, and the plant diagnostic system is configured to output the value based on the input signal value. A plant diagnostic system for performing a diagnostic process. 4. The plant diagnostic system according to claim 1, wherein a candidate for an input person who performs an operation of inputting the value of the off-line measurement signal to the plant diagnostic system is set in the plant. Monitor the position and compare the position of the candidate input person with the position of the sensor installed in the plant that measures the offline measurement signal or the position of the display device that displays the measured value measured by the sensor. A plant diagnostic system characterized in that the input person is determined thereby.