JP5950834B2 - Abnormality measuring device judgment system - Google Patents

Description

  This invention measures the same measured amount (measurement object) in a plant with the first measuring instrument and the second measuring instrument, and the measurement output of the first measuring instrument and the measurement output of the second measuring instrument. Is related to an abnormality measuring device determination system for determining abnormality of the above measuring device, for example, determining abnormality of a measuring device installed in each process of a water treatment plant, and supporting maintenance of the measuring device equipment The present invention can be applied to an abnormality measuring device determination system capable of performing the above.

  In general, there are many abnormal measurement device determination systems in water treatment plants that can detect only trend abnormalities by setting an upper limit value and a lower limit value of measurement values of the measurement devices. However, there is a case where the abnormality of the measuring instrument itself cannot be detected by the abnormality determination based on the upper and lower limit values.

Japanese Patent Laid-Open No. 11-353019

  Since the conventional abnormality measuring device determination system has the above characteristics, there is a risk that the information may be delayed or leaked when the measuring device needs to be inspected or when the measuring device breaks down. In addition, if maintenance of a measuring instrument is required based on information on inspection or failure, maintenance of a measuring instrument of the same type as that measuring instrument may be required as well. There is no function to extract and there is a risk of work delay and leakage.

This invention has been made to solve the above problems, and Indicate the "principal Inspection" and "failure", inspect the plant operator to detect the abnormality of the instrument more precisely The purpose of this is to make it possible to develop information on failures and failures at a more appropriate time .

The abnormality measuring device determination system according to the present invention compares the rate of change of the measurement output of the first measuring device with the rate of change of the measurement output of the second measuring device to determine the abnormality of the measuring device. The measurement output is greater at the time of startup than during steady operation of equipment in the plant, and the rate of change in the measurement output of the first measurement instrument and the measurement output of the second measurement instrument are If the difference between the rate of change exceeds the threshold, the abnormality of the measuring device is determined based on this detection, and the number of times that the result of the determination of the abnormality is output is a predetermined number, the measuring device is required. When the inspection is displayed, and the result of the abnormality determination is continuously output for a predetermined time, the measuring instrument displays a failure .

The present invention is an abnormality measuring device determination system that determines an abnormality of the measuring device by comparing the rate of change of the measuring output of the first measuring device and the rate of change of the measuring output of the second measuring device, The measurement output is larger at the time of start-up than during steady operation of the equipment in the plant, and the difference between the change rate of the measurement output of the first measurement device and the change rate of the measurement output of the second measurement device is a threshold value. Is detected and the abnormality of the measuring instrument is determined based on the detection, and if the number of times the result of the determination of the abnormality is output is a predetermined number, the measuring instrument is displayed as requiring inspection, If the result of the above-mentioned abnormality determination is output for a predetermined time, the above instrument will display a failure, so maintenance can be performed by distinguishing between “ needs to be inspected” and “failure”. Information on inspections and breakdowns can be expanded to employees at a more appropriate time There is a result.

It is a figure which shows Embodiment 1 of this invention, and is a figure which shows an example of the whole structure of an abnormality measuring device determination system. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows the example of operation | movement of the abnormality measuring device determination system illustrated in FIG. 1 with a flowchart. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows an example of a change of pump measured values like a pump flow until a pump starts from a stop state and a pump becomes a steady operation as an example. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows an example of the change rate of the measured value in the state change of a pump as an example. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows an example of the change of the threshold value of abnormality determination by a measured value change rate. It is a figure which shows Embodiment 2 of this invention, and is a figure which shows the other example of the whole structure of an abnormality measuring device determination system. It is a figure which shows Embodiment 2 of this invention, and is a figure which shows the example of operation | movement of the abnormality measuring device determination system illustrated in FIG. 6 with a flowchart. It is a figure which shows Embodiment 3 of this invention, and is a figure which shows the further another example of the whole structure of an abnormality measuring device determination system. It is a figure which shows Embodiment 3 of this invention, and is a figure which shows the example of operation | movement of the abnormality measuring device determination system illustrated in FIG. 8 with a flowchart. It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the further another example of the whole structure of an abnormality measuring device determination system. It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the example of operation | movement of the abnormality measuring device determination system illustrated in FIG. 10 with a flowchart. It is a figure which shows Embodiment 5 of this invention, and is a figure which shows the further another example of the whole structure of an abnormality measuring device determination system. It is a figure which shows Embodiment 5 of this invention, and is a figure which shows the example of operation | movement of the abnormality measuring device determination system illustrated in FIG. 12 with a flowchart.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing an example of the overall configuration of the abnormality measuring device determination system, FIG. 2 is a flowchart showing an example of the operation of the abnormality measuring device determination system illustrated in FIG. 1, and FIG. FIG. 4 is a diagram showing an example of changes in pump measurement values such as the pump flow rate until the pump enters steady operation, FIG. 4 is a diagram showing an example of the change rate of measured values in the pump state change, and FIG. It is a figure which shows an example of the change of the threshold value of abnormality determination by a measured value change rate.

  In FIG. 1, in each process of the water treatment plant, a primary measuring instrument (hereinafter referred to as “main measuring instrument”) 100 as a first measuring instrument and a secondary measuring instrument (hereinafter referred to as “secondary measuring instrument”). The measurement target (measured amount) in each process of the water treatment is measured in 200, and the measured value is output and accumulated in the plant monitoring server 300. The facility information management server 400 determines an abnormality of the measuring instrument based on the measurement value accumulated in the plant monitoring server 300 and the abnormality determination condition input from the plant monitoring server 300 to the facility information server 400. When the facility information management server 400 determines that the measuring instrument is abnormal, the determination result is output to the plant monitoring server 300. The determination result determined to be abnormal can be displayed in the plant monitoring server 300, and the plant operator can be informed of inspections and malfunctions to prompt the plant operator to perform maintenance.

Next, the operation will be described with reference to FIG.
In each process of the water treatment plant, the main measuring instrument 100 measures the measurement target of each process of water treatment in the measurement unit 101 (step S101), and outputs a measurement value from the measurement value output unit 102 (step S102). Similarly, the sub-measurement device 200 measures the measurement target of each process of water treatment in the measurement unit 201 (step S101), and outputs the measurement value from the measurement value output unit 202 (step S102).

  The plant monitoring server 300 receives the measurement values output from the main measuring instrument 100 and the sub measuring instrument 200 (step S301) and accumulates them in the database unit 301 (step S302). Further, a condition for determining whether the measuring instrument is abnormal is input from the condition input unit 303 (step S303) and transmitted to the facility information server 400 (step S304). When the equipment information server 400 determines that the measuring instrument is abnormal and outputs a determination result (step S401), the determination result display unit 302 displays the determination result (step S305).

  In the facility information server 400, the condition determination unit 401 stores the condition for determining whether it is an abnormal instrument transmitted from the condition input unit 303 (step S402), and the abnormality measurement unit determination unit 402 stores it in the determination condition setting unit 401 It is determined whether or not the measuring instrument is abnormal by referring to the measured condition and the measurement value stored in the database unit 301 (step S403). When it is determined that the measuring instrument is abnormal, the determination result output unit 403 transmits the determination result to the determination result display unit 302 (step S401).

  In the first embodiment, a plurality of measuring instruments are installed in each process of the water treatment plant, and the abnormality measuring instrument determination unit 402 is provided in the facility information server 400. Therefore, the measuring instrument is not affected by changes in measured values due to plant operation. Abnormalities can be easily detected.

  Next, the operation of the abnormality measuring device determination unit 402 will be described using a specific example with reference to FIGS. 3, 4, and 5. FIG. 3 shows changes in pump measurement values such as the pump flow rate until the pump starts from a stopped state and the pump enters a steady operation. FIG. 4 shows the change rate of the measured value in the state change of the pump. FIG. 5 shows changes in the threshold value for abnormality determination based on the measured value change rate.

  Since the measured value is 0 when the pump is stopped, the rate of change is also 0. Since the measured value changes greatly when the pump is started, the rate of change becomes large. At this time, due to factors such as individual differences and deterioration of the flowmeters, the measured values of the main measuring device 100 and the sub-measuring device 200 are different, so the difference in change rate also increases. When the pump is in steady operation, the measured value becomes almost constant, so the rate of change becomes almost zero and the difference in rate of change becomes small.

When the difference between the measured values of the two measuring instruments, that is, the difference between the measured value of the main measuring instrument 100 and the measured value of the sub measuring instrument 200 exceeds the threshold value input from the condition input unit 303, either measuring instrument Judge as abnormal.
However, when the difference in the rate of change becomes large as when the pump is activated, the difference between the two measured values becomes large even if the measuring instrument is normal. At this time, if the threshold value for determining that the measuring instrument is abnormal is always constant, the measurement value may exceed the threshold value even though the measuring instrument is normal, and the measuring instrument may be erroneously determined to be abnormal. is there.

  Therefore, as shown in FIG. 5, when the measured value change rate becomes large at the time of starting the pump, by increasing the threshold value, it is possible to avoid erroneous determination when the measuring instrument is normal. On the other hand, when the pump is in a steady operation, the change rate of the measured value is small, so the threshold value is small.

Embodiment 2. FIG.
A second embodiment of the present invention will be described below with reference to FIGS. FIG. 6 is a diagram illustrating another example of the overall configuration of the abnormality measuring device determination system, and FIG. 7 is a flowchart illustrating an example of the operation of the abnormality measuring device determination system illustrated in FIG.

In the first embodiment, the measurement values obtained from the main measuring instrument 100 and the sub-measuring instrument 200, the condition setting of the measuring instrument abnormality in the plant monitoring server 300 and the display of the determination result, the association of the measuring instrument abnormality determination in the facility information server 400 However, in the second embodiment, as illustrated in FIG. 6, the determination result calculation unit 404 is provided in the facility information server 400 so that the determination result output unit 403 outputs the determination result determined to be an abnormality of the measuring instrument. When the determination result determined that the measuring instrument is abnormal is output any number of times input from the condition input unit 303 (step S404), it is determined that the main measuring instrument 100 and the sub measuring instrument 200 need to be inspected (step S405), and transmits the determination result to the plant monitoring server 300 (step S401).

When the determination result output unit 403 continues to output the determination result determined to be an abnormality of the measuring instrument for an arbitrary time input from the condition input unit 303 (step S404), it is determined that the main measuring instrument 100 and the sub measuring instrument 200 are out of order ( Step S406), and the determination result is transmitted to the plant monitoring server 300 (Step S401). In the determination result display unit 302, it is displayed that inspection is necessary and failure.

  In the second embodiment, since the determination result calculation unit 404 is provided, it is possible to determine whether the inspection of the measuring instrument is necessary or failure, notify the plant operator of the type of abnormality of the measuring instrument, and prompt maintenance. Can do.

Embodiment 3 FIG.
A third embodiment of the present invention will be described below with reference to FIGS. FIG. 8 is a diagram showing still another example of the overall configuration of the abnormality measuring device determination system, and FIG. 9 is a flowchart showing an example of the operation of the abnormality measuring device determination system illustrated in FIG.

  In the second embodiment, the association between the plant monitoring server 300 and the facility information server 400 in the inspection of the main measuring instrument 100 and the sub measuring instrument 200 and the determination of the failure has been described. Although it was not possible to determine which of the devices 200 is abnormal, in the third embodiment, as illustrated in FIG. 8, an abnormality measuring device determination measuring device 500 is provided, and the determination result calculation unit 402 performs three measurements. It is possible to identify a measuring instrument that has measured a difference from the other two measured values over the condition input from the condition input unit 303 as being in need of inspection or failure (step S407).

  In Embodiment 3 described above, an abnormal measuring instrument can be identified by providing three measuring instruments in each process of the water treatment plant, and calculating the determination result by the determination result calculating unit 402. It is possible to encourage maintenance of measuring instruments.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described below with reference to FIGS. FIG. 10 is a diagram illustrating still another example of the overall configuration of the abnormality measuring device determination system, and FIG. 11 is a flowchart illustrating an example of the operation of the abnormality measuring device determination system illustrated in FIG.

  In the third embodiment, it has been described that the inspection or failure of the measuring instrument can be specified. In the third embodiment, as shown in FIG. 10, the facility information server 400 includes the manufacturer, model number, and delivery year of the measuring instrument. A facility information database unit 405 in which the facility information is registered is provided, and the facility information of the measuring instrument determined to be abnormal can be transmitted from the determination result output unit 403 (step S408) and displayed on the determination result display unit 302 (step S305). it can.

  In the fourth embodiment, the facility information database unit 405 is provided, and the facility information of the measuring instrument determined to be abnormal can be displayed, so that the information regarding the maintenance and replacement of the abnormal measuring instrument can be quickly expanded to the plant operator.

Embodiment 5 FIG.
The fifth embodiment of the present invention will be described below with reference to FIGS. FIG. 12 is a diagram illustrating still another example of the overall configuration of the abnormality measuring device determination system, and FIG. 13 is a flowchart illustrating an example of the operation of the abnormality measuring device determination system illustrated in FIG.

  In the fifth embodiment, in addition to the fourth embodiment illustrated in FIG. 10, as illustrated in FIG. 12, a similar instrument extracting unit 406 is provided, and the same facility information 407 stored in the facility information database unit 405 is provided. Can be extracted (step S409), and information on the same type of measuring instrument as that determined to be abnormal can be output from the determination result output unit 403 (step S401) and displayed on the determination result display unit 302 (step S305). .

  In the fifth embodiment, the same type of measuring instrument extraction unit 406 is provided, and equipment information of the same type as that of an abnormal measuring instrument can be extracted from the equipment information database unit 405, so that a plant operator before an abnormality of the measuring instrument occurs. Can be inspected and replaced.

As is apparent from the above, the first to fifth embodiments of the present invention have the following technical features.
Feature 1: The same measured quantity in the plant is measured by the first measuring instrument and the second measuring instrument, and the measurement output of the first measuring instrument is compared with the measurement output of the second measuring instrument. An abnormality measurement device determination system for determining an abnormality of the measurement device, wherein the measurement depends on a difference between a change rate of measurement output of the first measurement device and a change rate of measurement output of the second measurement device. It is an abnormality measuring device determination system for determining abnormality of a device.
Feature 2: In the abnormality measuring device determination system according to Feature 1, it is detected that the difference between the measured output of the first measuring device and the measured output of the second measuring device exceeds a threshold value, and based on this detection An abnormality measuring device determination system for determining abnormality of the measuring device.
Feature 3: In the abnormality measuring device determination system according to Feature 2, the magnitude of the threshold depends on the difference between the rate of change in measurement output of the first meter and the rate of change in measurement output of the second meter This is an abnormality measuring device determination system.
Feature 4: In the abnormality measuring device determination system according to any one of features 1 to 3, the measurement output of the first measurement device and the measurement output of the second measurement device are accumulated and the first measurement device is stored. A plant monitoring server that displays a result of determining an abnormality of the measuring instrument depending on a difference between a measuring output change rate of the measuring instrument and a measuring output change rate of the second measuring instrument, and the first measurement An abnormality measuring device determination system provided with an equipment information server having a function of determining an abnormality of the measuring device based on a difference between a measuring output change rate of the measuring device and a measuring output change rate of the second measuring device. is there.
Feature 5: An abnormality measuring device according to any one of features 1 to 4, wherein the abnormality measuring device determines an abnormality of the measuring device and determines that the measuring device is faulty when the abnormality continues for a predetermined period. Judgment system.
Feature 6: In the abnormality measuring device determination system according to Feature 4, the facility information server has a function of determining abnormality of the measuring device and determining that the measuring device is faulty when the abnormality continues for a predetermined period of time, It is an abnormality measuring device determination system in which a result of determining that a measuring device is faulty is displayed on the plant monitoring server.
Feature 7: The abnormality measuring device determination system according to any one of features 4 to 6, wherein the determination condition is set from the plant monitoring server to the facility information server.
Feature 8: In the abnormality measuring device determination system according to any one of Features 4 to 7, the equipment information server includes the manufacturer name and model number of the measuring device and another measuring device of the same type as the measuring device. An abnormality measuring device determination system in which at least one of the delivery date is registered as equipment information.
Feature 9: The abnormality measuring device determination system according to feature 8, wherein the facility information is displayed on the plant monitoring server together with the display of the abnormality of the measuring device.

Feature 10: Output from two measuring instruments of the same type of “sub-measurement device” that measures the same measurement object as various “main measurement devices” such as flow meters and sludge concentration meters installed in each process of the water treatment plant “Plant monitoring server” with a database function for storing measured values and various data input / output functions and display functions, and “facility information” for detecting abnormalities in measuring instruments from the measured values stored in the “plant monitoring server” In the abnormal measurement device determination system having a server, the measurement values from the “main measurement device” and “sub measurement device” installed in the water treatment plant, and the “main measurement device” and “sub measurement device” are obtained. The "facility information server" that calculates the measurement value stored in the "plant monitoring server" to be stored and detects an abnormality of the measuring instrument, and the determination result output from the "facility information server" are displayed and "equipment information" server It is abnormal instrument determination system characterized in that a "plant monitoring apparatus" having a display device capable of setting the abnormal instrument determination conditions.
Feature 11: In feature 10, the “equipment information server” in which an abnormality measuring device determination condition is set accumulates the number of times the determination result determined to be an abnormality of the measuring device is accumulated, and the determination result determined to be an abnormality of the measuring device is an arbitrary number of times. When it is output, it displays a message prompting the plant operator to check the “main measurement device” and “sub-measurement device”, and when the judgment result determined to be an abnormality of the measurement device continues to be output for a certain period of time, the “main measurement” is displayed to the plant operator. "Plant monitoring server" with a display device that displays that the "instrument" and "secondary measuring instrument" have failed, and the above-mentioned "main measuring instrument" when the determination result determined as measuring instrument abnormality is output a certain number of times When the judgment result that prompts the inspection of the “sub instrument” is output and the judgment result judged to be abnormal is continuously output for a certain time, the judgment result that the “main instrument” and the “sub instrument” are faulty is displayed. "With output function" Is abnormal instrument determination system characterized in that a Bei information server ".
Feature 12: In the feature 11, in the water treatment plant of the feature 10, the same kind of “measurement device for abnormality detection” that measures the same measurement object as the “main measurement device” and the “sub measurement device” is installed, and the “equipment for feature 11” An anomaly meter equipped with an “equipment information server” that has the function of detecting an abnormality of a specific measuring instrument using an “information server” and outputting a determination result that prompts the inspection of the measuring instrument and a determination result that the measuring instrument is faulty Judgment system.
Feature 13: “Facility 10” with the equipment information database function that registers the manufacturer, model number, delivery year, etc., of the measuring instrument determined to be abnormal in the “abnormality measuring instrument determination system” according to any one of characteristics 10 to 12. An abnormality measuring device determination system including an “information server” and a “plant monitoring server” including a display device that displays facility information data of abnormal measuring devices.
Feature 14: In feature 13, an “equipment information server” having a function of extracting a measuring device of the same type as the abnormal measuring device and outputting other measuring device facility information data of the same type as the abnormal measuring device is determined as abnormal. It is an abnormality measuring device determination system including a “plant monitoring server” including a display device that displays to prompt inspection of another measuring device of the same type as the measuring device.

In the present invention, each embodiment can be appropriately modified or omitted within the scope of the invention.
In the drawings, the same reference numerals indicate the same or corresponding parts.

100 primary measuring instrument (first measuring instrument), 200 secondary measuring instrument (second measuring instrument),
300 plant monitoring server, 400 facility information server.

Claims (5)

An abnormality measuring device determination system that compares the change rate of the measurement output of the first measurement device with the change rate of the measurement output of the second measurement device to determine an abnormality of the measurement device,
The measurement output is larger at the time of start-up than during steady operation of the equipment in the plant, and the difference between the change rate of the measurement output of the first measurement device and the change rate of the measurement output of the second measurement device is a threshold value. Is detected and the abnormality of the measuring instrument is determined based on the detection, and if the number of times the result of the determination of the abnormality is output is a predetermined number, the measuring instrument is displayed as requiring inspection, The abnormality measuring device determination system, wherein if the abnormality determination result continues to be output for a predetermined time, the measuring device displays a failure . In the abnormality measuring device determination system according to claim 1,
The abnormality measuring device determination system characterized in that the threshold value is increased when the rate of change becomes large at the time of startup, and the threshold value becomes smaller at the time of steady operation . In the abnormality measuring device determination system according to claim 1 or 2,
The measurement output is larger at the time of start-up than during steady operation of the equipment in the plant, and the difference between the change rate of the measurement output of the first measurement device and the change rate of the measurement output of the second measurement device is a threshold value. The equipment information server that detects the abnormality of the measuring instrument based on this detection, and the measuring instrument is in need of inspection if the number of times the abnormality determination result is output is a predetermined number of times. A system for determining an abnormality measuring device, comprising: a plant monitoring server for displaying and displaying that the measuring device is in failure when the result of the abnormality determination is continuously output for a predetermined time . In the abnormality instrument determination system according to 請 Motomeko 3,
The abnormality measuring device determination system, wherein the determination condition is set from the plant monitoring server to the facility information server . In the abnormality measuring device determination system according to claim 3 or claim 4 ,
In the equipment information server, at least one of the manufacturer name, model number, and delivery date of each of the measuring instrument and other measuring instruments of the same type as the measuring instrument is registered as equipment information.
The facility information of the measuring instrument and another measuring instrument of the same type as the measuring instrument is displayed on the plant monitoring server together with a display of the inspection required and a display of the failure. An anomaly measuring device judgment system.

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