JP4829084B2 - Operation support system and method for water treatment plant - Google Patents

Description

  The present invention relates to an operation support system for a water treatment plant such as a water and sewage plant.

  For example, in a water treatment plant such as a waterworks plant, an operation support system that performs operation, monitoring, abnormality diagnosis, and the like of devices constituting the plant is incorporated for the purpose of performing each process stably. The driving support system analyzes the causal relationship between the abnormal phenomenon and the failure based on the relationship between the abnormality and the failure at the time of finding the failure or abnormality sign of each device, investigates the cause of the abnormality or the failure, and measures for the cause Is running.

  Here, when a physical phenomenon that is a sign of abnormality or failure is clear in a plant, a sensor for measuring the physical phenomenon has been installed in a device to be diagnosed. However, in order to install a sensor for diagnosis, it is necessary to modify the device to be diagnosed. Of course, in addition to normal equipment, a new sensor dedicated to diagnosis of abnormalities and faults is required in the plant, which increases costs.

A method for evaluating the soundness of a plant without installing a new sensor has been proposed (see, for example, Patent Document 1). This method takes in the state quantities of the subsystems that make up the main system of the plant, such as the number of revolutions of the pump, valves, and flow meters, and converts each of the operating state, standby state, abnormal operating state, and standby abnormal state into data judge. That is, since this method is a method for evaluating the soundness of the plant using the state quantity of the plant, it is not necessary to newly install a sensor for diagnosis.
JP 60-147811 A

In the prior art method, it is not necessary to install a new sensor for diagnosis in the plant, but there may be a case where a single failure of the subsystem cannot be accurately captured. Specifically, the flowmeter is normally assigned a current output of 4 to 20 mA as the minimum flow rate and the maximum flow rate in the range of flow rates used. That is, when the minimum flow rate is 0 m ³ / h (when there is no flow rate), 4 mA is output from the flow meter. From this, when the output from the flow meter becomes 0 mA, it can be determined that the flow meter has failed. However, if the flow meter fails and the output is fixed in the range of 4 to 20 mA, the above-described method can determine whether the flow meter is broken or whether the flow rate is constant and unchanged. Can not.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a plant operation support system that can reliably determine a failure or abnormality of a plant device without installing a new diagnostic sensor in the plant.

  An operation support system according to an aspect of the present invention is a water treatment plant including a process for controlling inflow or outflow of water with respect to a water storage facility, a water level meter for measuring a water level of the water storage facility, and an inflow of the water. A flow rate control means having a first valve means for controlling and a second valve means for controlling the outflow of water, a detection means for detecting an open / closed state of each of the first and second valve means, and the water level Based on the measurement result of the meter and the detection result of the detection means, when the consistency between the change in the water level of the water storage facility and the open / closed states of the first and second valve means cannot be obtained, And a control unit that determines abnormality of the water level gauge or the detection unit and outputs the determination result.

  ADVANTAGE OF THE INVENTION According to this invention, the driving assistance system which can determine reliably the failure and abnormality of the apparatus provided in the plant can be provided, without installing the new sensor for a diagnosis in a plant.

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

[First Embodiment]
(System configuration)
FIG. 1 is a diagram for explaining a configuration of a water distribution process and an operation support system of a water supply plant, for example, regarding the present embodiment.

  The plant includes a reservoir (water storage facility) 1 that retains purified water 10 generated by water purification treatment, an inflow pipe 3, an outflow pipe 4, an electric valve (valve) 5 for controlling the inflow amount, and an outflow amount. And a motor-operated valve (valve) 7 for controlling the motor.

  Further, the plant has a water level meter 2 for measuring the water level of the reservoir 1, limit detectors 6 and 8 for detecting the open / closed states of the motor-operated valves 5 and 7, and an inflow pipe as equipment sensors. 3 and a flow meter 9 provided in the apparatus 3.

  Each of the limit detectors 6 and 8 detects the fully closed state of the motor-operated valves 5 and 7 and outputs a detection signal. The motor-operated valves 5 and 7 have a fully closed state in which the valves are completely closed, a fully opened state in which the valves are fully opened, and an intermediate open / closed state in which about half are opened. The flow meter 9 passes the inflow pipe 3 and detects the inflow amount of purified water flowing into the distribution reservoir 1.

  The plant operation support system is composed of a computer and includes a controller 20 and a storage device 21 which are main elements. The controller 20 inputs a measurement result or detection signal from each device sensor, monitors the state of the plant, and has a driving support function for diagnosing a failure or abnormality of each device sensor, as will be described later. The storage device 21 stores table information 30 necessary for the driving support operation for diagnosing a failure or abnormality of the present embodiment, in addition to various control information necessary for the operation of the controller 20.

(System diagnostic operation)
The diagnosis operation of the system will be described below with reference to the flowchart of FIG. 2 together with FIG.

  First, in the water distribution process of the plant, the purified water 10 generated by the water purification process flows into the distribution reservoir 1 through the inflow pipe 3. At this time, the inflow amount of the purified water 10 to the distribution reservoir 1 is controlled by the electric valve 5. Further, the inflow amount of purified water is measured by a flow meter 9 provided in the inflow pipe 3. On the other hand, the purified water 10 retained in the distribution reservoir 1 is distributed to another process by the outflow pipe 4. At this time, the outflow amount of the purified water 10 from the distribution reservoir 1 is controlled by the electric valve 7.

  The controller 20 detects the inflow amount of the purified water 10 into the distribution reservoir 1 by inputting the measurement signal from the flow meter 9 (step S1). Here, the controller 20 has a measurement signal from the water level meter 2 (indicated value of the water level) and a detection signal from the limit detectors 6 and 8 (the motor valves 5 and 7 are fully closed) together with the measurement signal from the flow meter 9. State detection signal).

  The controller 20 refers to the table information 30 stored in the storage device 21 by using the input measurement signal or detection signal, and detects the failure or abnormality of each of the device sensors 2, 6, 8, 9 as follows. Execute the process to diagnose. The table information 30 includes information for determining a condition indicating a logical consistency of a combination of measurement results and detection results of each device sensor when the water distribution process is normally operated. That is, when the controller 20 refers to the table information 30 and determines that the combination of the measurement result and detection result of each device sensor is not logically consistent, either of the device sensors or It is determined that a plurality are malfunctions or abnormalities.

  Specifically, the controller 20 recognizes a change in the water level of the purified water 10 in the reservoir 1 from the measurement signal from the water level gauge 2 based on the indicated value of the water level (steps S2 and S3). When the indicated value of the water level meter 2 does not change, that is, when there is no change in the water level of the distribution reservoir 1, the inflow amount of the purified water 10 into the distribution reservoir 1 and the outflow amount from the distribution reservoir 1 are equal.

  When the controller 20 refers to the table information 30 and there is no change in the water level of the distribution reservoir 1, as a condition for ensuring consistency, the motor-operated valves 5 and 7 are all in the fully closed state or the fully open state. Recognize The controller 20 detects the open / close state of the motor-operated valves 5 and 7 based on the detection signals from the limit detectors 6 and 8 (step S7). Based on this detection, when one of the motor-operated valves 5 and 7 is fully open, the controller 20 determines that one of the limit detectors 6 and 8 is out of order (YES in step S8, S6).

  On the other hand, when there is a change in the water level of the distribution reservoir 1, either the inflow amount of the purified water 10 into the distribution reservoir 1 or the outflow amount from the distribution reservoir 1 is zero. The controller 20 refers to the table information 30 and, as a condition for ensuring consistency when there is a change in the water level of the reservoir 1, indicates that one of the motor-operated valves 5 and 7 is in a fully closed state or a fully open state. recognize.

  The controller 20 detects the open / close state of the motor-operated valves 5 and 7 based on the detection signals from the limit detectors 6 and 8 (step S4). Based on this detection, the controller 20 determines that one of the limit detectors 6 and 8 is out of order when both the motor-operated valves 5 and 7 are fully closed (YES in step S5, S6). Further, the controller 20 determines that any one of the limit detectors 6 and 8 is out of order even when both the motor-operated valves 5 and 7 are fully open (NO in step S5, YES in S9, S6).

  When it is determined that there is a failure or abnormality, the controller 20 executes an alarm output including the determination result. As the alarm output, for example, it is notified on the display of the display device that one or both of the limit detectors 6 and 8 are malfunctioning or abnormal in the device sensor. The plant operator can inspect the device sensor determined to be faulty or abnormal by the alarm output, and replace it if necessary.

  In addition to the diagnostic processing as described above, the controller 20 refers to the table information 30, and when there is no inflow of the purified water 10 into the distribution reservoir 1 based on the measurement signal from the flow meter 9, the limit detector 6, When the detection signal indicating the fully closed state is output from 8 and the indication value of the water level from the water level indicator 2 is changed, it is determined that the water level indicator 2 is broken.

  Similarly, the controller 20 has no output from the limit detector 6 and the output from the limit detector 8 when there is an inflow of the purified water 10 into the distribution reservoir 1 based on the measurement signal from the flow meter 9. In some cases, that is, even when the motor-operated valve 5 is in a fully open state or an intermediate open / close state and the motor-operated valve 7 is in a fully-closed state, the indication value of the water level gauge 2 has not increased. Is determined to be abnormal. Specifically, the controller 20 determines that one or both of the water level gauge 2 and the limit detector 8 has failed.

  Furthermore, when there is an inflow of purified water 10 into the distribution reservoir 1, the controller 20 does not output from the limit detector 6, that is, when the motor-operated valve 5 is in a fully open state or an intermediate open / close state, the flow meter 9 When the measurement signal is not output, it is determined that the flow meter 9 has failed.

  In short, in the system of this embodiment, without providing a sensor for failure or abnormality diagnosis processing, it is possible to determine the failure or abnormality of a device sensor and output an alarm output based on the consistency between existing device sensors. It can be carried out. Therefore, since the failure or abnormality of the existing device sensor can be detected at an early stage without incurring an increase in cost for the failure or abnormality diagnosis process, effective plant operation support can be realized.

  In the present embodiment, the method in which the controller 20 determines the consistency between the device sensors with reference to the table information 30 stored in advance in the storage device 21 has been described. However, the present invention is not limited to this. Specifically, the controller 20 may be a method for determining consistency between device sensors by executing a diagnostic processing program including a function for determining consistency between device sensors.

[Second Embodiment]
Drawing 3 is a figure for explaining the composition of the supply process of the purified water of a waterworks plant, and the operation support system about a 2nd embodiment.

  The plant includes a water purification tank (water storage facility) 11 in which the purified water 10 generated by the water purification treatment is retained, and an outflow pipe 13 for supplying the purified water 10 of the water purification tank 11 to a distribution reservoir or the like. A water level meter 12 for measuring the water level of the purified water 10 is installed in the purified water pond 11.

  A pump motor 14, a discharge valve 16, and a flow meter 18 are connected to the outflow pipe 13. The pump motor 14 increases the pressure of the purified water 10 from the purified water reservoir 1 and causes it to flow out. The discharge valve 16 is disposed on the discharge side of the pump motor 14 and controls the discharge amount of the purified water 10. The flow meter 18 is installed to measure the discharge flow rate of the purified water 10.

  Further, in the plant, as a device sensor, in addition to the water level meter 12 and the flow meter 18, limit detection for detecting the open / closed state of the rotation meter 15 and the discharge valve 16 for measuring the rotation speed of the pump motor 14 A vessel 17 is installed. The limit detector 17 outputs a detection signal when the discharge valve 16 detects a fully closed state.

  The plant operation support system has a controller 20 and a storage device 21 similar to those shown in FIG. 1 described above, and inputs the measurement results and detection signals from the devices sensors to monitor the state of the plant. In addition, it has a driving support function for diagnosing failures and abnormalities in the sensors for each device. The storage device 21 stores table information 31 necessary for the driving support operation for diagnosing the failure and abnormality of the present embodiment, in addition to various control information necessary for the operation of the controller 20.

  The table information 31 is basically the same as the table information 30 shown in FIG. 1, and when the plant is operating normally, the logical consistency of the measurement results and detection result combinations of each device sensor is obtained. It consists of information for judging the conditions to be shown. That is, when the controller 20 refers to the table information 31 and determines that the combination of the measurement result and detection result of each device sensor is not logically consistent, either of the device sensors or It is determined that a plurality are malfunctions or abnormalities.

(System diagnostic operation)
Hereinafter, the diagnosis operation of the system will be described with reference to the flowchart of FIG. 4 together with FIG.

  First, in the plant, the purified water 10 flows out from the purified water basin 11 to the outflow pipe 13 by driving the pump motor 14 (step S11). At this time, the outflow amount of the purified water 10 is controlled by the discharge valve 16. Further, the outflow amount of the purified water 10 is measured by a flow meter 18 provided in the inflow pipe 3.

  The controller 20 measures the measurement signal from the water level meter 2 (indicated value of the water level), the rotational speed of the pump motor 14 from the tachometer 15, and the detection signal from the limit detector 17 (the detection signal when the discharge valve 16 is fully closed). , And a measurement signal from the flow meter 18 is input. The controller 20 refers to the table information 31 stored in the storage device 21, determines a condition indicating the logical consistency of the measurement result of each device sensor and the combination of the detection results, and determines that there is no logical consistency. In such a case, it is determined that one or more of the devices sensors are malfunctioning or abnormal.

  Specifically, the controller 20 recognizes a change in the water level of the water purification basin 11 based on the indication value of the water level from the measurement signal from the water level gauge 2 (steps S12 and S13). When the purified water 10 is flowing out from the purified water pond 11, the indicated value of the water level meter 2 indicates a decrease. Accordingly, when the indicated value of the water level gauge 2 does not increase or change, the controller 20 determines that the water level gauge 2 is faulty or abnormal and performs the same alarm output as described above (NO in step S13, S17). .

  Further, the controller 20 recognizes the drive state of the pump motor 14 based on the measured value from the tachometer 15 (step S14). When the pump motor 14 is operating, the measured value of the tachometer 15 indicates a value exceeding zero. Therefore, when the measured value of the tachometer 15 is zero, the controller 20 determines that the tachometer 15 is faulty or abnormal, and outputs an alarm (steps S14 and S18).

  Furthermore, the controller 20 recognizes the open / closed state of the discharge valve 16 based on the detection signal of the limit detector 17 (step S15). In this case, in a normal state, the discharge valve 16 is in a fully open state or an intermediate open / close state. Therefore, when there is a detection signal from the limit detector 17 (the discharge valve 16 is fully closed), the controller 20 determines that the limit detector 17 is faulty or abnormal and outputs an alarm (in step S15). YES, S19).

  Furthermore, the controller 20 recognizes the outflow amount of the purified water 10 based on the measurement value from the flow meter 18 (step S16). In this case, in a normal state, the measurement value of the flow meter 18 shows a value exceeding zero. Therefore, when the measured value of the flow meter 18 is zero, the controller 20 determines that the flow meter 18 is faulty or abnormal, and outputs an alarm (steps S16 and S20).

  As described above, according to the present embodiment, when the output state of each of the device sensors 12, 15, 17, and 18 is detected in a normal state of the plant, It is determined that the device sensor to be malfunctioning or abnormal. Therefore, as in the first embodiment, without providing a sensor for failure or abnormality diagnosis processing, the failure or abnormality of the device sensor is determined based on the consistency between existing device sensors, and an alarm output is output. It can be carried out. Therefore, since the failure or abnormality of the existing device sensor can be detected at an early stage without incurring an increase in cost for the failure or abnormality diagnosis process, effective plant operation support can be realized.

  In the present embodiment, the method in which the controller 20 determines the consistency between the device sensors by referring to the table information 31 stored in the storage device 21 in advance has been described. However, the present invention is not limited to this. Specifically, the controller 20 may be a method for determining consistency between device sensors by executing a diagnostic processing program including a function for determining consistency between device sensors.

[Third Embodiment]
FIG. 5 is a diagram for explaining a configuration of a rainwater process and an operation support system of a sewer plant, for example, regarding the third embodiment. In addition, since members or equipment such as an outflow pipe that flows out rainwater and an inflow pipe that flows in are the same as those shown in FIG. 1 or FIG.

  As shown in FIG. 5, the plant according to the present embodiment is installed in a pump well (water storage facility) 50 that retains rainwater for processing rainwater and the like, and the pump well 50 to measure the level of rainwater. Water level gauges 51-54. The water level meters 51 to 54 are, for example, any one of an ultrasonic level meter, a capacitance type level meter, a contact type level meter, a magnetostrictive level meter, and a throwing type water level meter.

  Here, the water level meter 51 and the water level meter 52 installed in the vicinity are different types of water level meters. Further, the water level gauge 53 and the water level gauge 54 installed in the vicinity are different types of water level gauges. On the other hand, the water level gauge 51 and the water level gauge 53 are the same type of water level gauge. Similarly, the water level gauge 52 and the water level gauge 54 are the same type of water level gauge.

  Further, the group of the water level gauge 51 and the water level gauge 52 and the group of the water level gauge 53 and the water level gauge 54 are arranged in the pump well 50 at positions separated from each other. The water level gauge 51 and the water level gauge 52 of the same group shall indicate the same water level indication value as a measurement value even in the case of different types of water level gauges. Similarly, the water level gauge 53 and the water level gauge 54 of the same group indicate the same water level indication value as a measurement value even in the case of different types of water level gauges.

  The controller 20 inputs each measurement value from the water level gauges 51 to 54 and monitors the water level of the rainwater flowing into the pump well 50. For example, when the water level exceeds the allowable range, the control causes the rainwater to flow out from the pump well 50. Execute. On the other hand, the controller 20 executes the diagnostic process of the water level gauges 51 to 54 and always monitors the accurate water level of the pump well 50.

  As mentioned above, there are various types of water level meters such as ultrasonic level meters, capacitance level meters, contact type level meters, magnetostrictive level meters, and throw-in type water level meters. The characteristics and failure phenomena are different. Specifically, the ultrasonic level meter is a method of measuring the distance to the water surface and converting it to a water level. For this reason, when the water surface of the pump well 50 is frozen, the ultrasonic level meter cannot accurately measure the water level. The throw-in type water level meter is a method of measuring the water pressure with a pressure sensor and converting it to a water level. For this reason, when the pressure sensor is buried in mud or when the atmospheric pressure fluctuates greatly, the error becomes large and measurement is impossible.

  Therefore, as shown in FIG. 5, different types of water level gauges are used for the pump well 50 in the group of the water level gauge 51 and the water level gauge 52 that are substantially in the same position. Similarly, in the group of the water level gauge 53 and the water level gauge 54, different types of water level gauges are used.

  The controller 20 detects the water level at substantially the same position of the pump well 50 based on the measured values from the different types of water level meters 51 and 52 and the water level meters 53 and 54 for each group. Here, for example, when a deviation occurs in the measured values from the water level gauges 51 and 52 of the same group, it is impossible to determine which water level gauge is faulty or abnormal.

  Then, the controller 20 determines which water level meter is normal based on the comparison result with the measured value of the same kind of water level meter installed in another position. Specifically, in the pump well 50, the controller 20 stores the deviation of the water level between groups at different positions as a reference value, and compares this reference value with the deviation of the measurement value of the same kind of water level gauge. That is, for example, when a deviation occurs in the measurement values from the water level gauges 51 and 52 of the same group, the controller 20 causes the measurement value of the same kind of water level gauge 53 installed at a different position from the measurement value of the water level gauge 51. The deviation from is calculated. Furthermore, the controller 20 compares the calculated deviation between the same kind of water level gauges 51 and 53 with the reference value, and determines that the water level gauge 51 is normal if it is within an allowable range. Therefore, in this case, the controller 20 determines that one of the water level gauges 52 in the same group is faulty or abnormal, and outputs an alarm.

  As described above, in the case of the system of the present embodiment, in a plant having a plurality of equipment sensors such as the same kind and different kinds of water level gauges 51 to 54, if the output status of each equipment sensor is inconsistent, Alternatively, the device sensor that is abnormal can be determined. Therefore, since the failure or abnormality of the existing device sensor can be detected at an early stage without incurring an increase in cost for the failure or abnormality diagnosis process, effective plant operation support can be realized.

  In this embodiment, a water level meter is assumed as the device sensor. However, when measuring the process state of a plant using a plurality of the same type and different types of device sensors, a sensor other than the water level meter or measurement is used as the device sensor. It can also be applied to a vessel.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The figure for demonstrating the structure of the water distribution process of the water supply plant regarding the 1st Embodiment of this invention, and an operation assistance system. The flowchart for demonstrating the diagnostic operation | movement of the system regarding this embodiment. The figure for demonstrating the structure of the waterworks plant and operation assistance system regarding 2nd Embodiment. The flowchart for demonstrating the diagnostic operation | movement of the system regarding 2nd Embodiment. The figure for demonstrating the structure of the plant regarding 3rd Embodiment, and an operation assistance system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reservoir (water storage equipment), 2 ... Water level meter, 3 ... Inflow pipe, 4 ... Outflow pipe, 5 ... Electric valve (valve),
6 ... limit detector, 7 ... motorized valve (valve), 8 ... limit detector, 9 ... flow meter,
10 ... purified water, 11 ... purified pond (water storage facility), 12 ... water level gauge, 13 ... outflow pipe,
14 ... pump motor, 15 ... tachometer, 16 ... discharge valve, 17 ... limit detector,
18 ... Flow meter, 20 ... Controller, 21 ... Storage device, 30, 31 ... Table status,
50 ... Pump well, 51-54 ... Water level gauge.

Claims (10)

In a water treatment plant that includes a process that controls the inflow or outflow of water to a water storage facility,
A water level meter for measuring the water level of the water storage facility;
Flow rate control means having first valve means for controlling the inflow of water and second valve means for controlling the outflow of water;
Detecting means for detecting an open / closed state of each of the first and second valve means;
Based on the measurement result of the water level gauge and the detection result of the detection means, a logical consistency is obtained between the change in the water level of the water storage facility and the open / closed states of the first and second valve means. A driving support system comprising: a control unit that determines abnormality of the water level gauge or the detection unit and outputs the determination result when there is not. The detection means includes
The detection signal is output when each of the first and second valve means is in a fully closed state in a fully open state, a fully closed state, and an intermediate open / close state. The driving support system according to 1. It has a flow meter that measures the flow rate of water flowing into or out of the water storage facility,
The control means includes
Based on the measurement result of the water level meter, the detection result of the detection means and the measurement result of the flow meter, an abnormality of the water level meter, the detection means or the flow meter is determined, and the determination result is output. The driving support system according to claim 1, wherein the driving support system is provided. A memory for storing table information for judging a condition of logical consistency between a change in the water level of the water storage facility and the open / closed state based on a combination of the measurement result of the water level gauge and the detection result of the detection means Having means,
The said control means is comprised so that abnormality of the said water level meter or the said detection means may be determined with reference to the said table information, The any one of Claims 1-3 characterized by the above-mentioned. Driving support system. In a water treatment plant that includes the process of distributing water from a water storage facility through an outflow pipe,
A water level meter for measuring the water level of the water storage facility;
A flow meter for measuring the amount of water passing through the outflow pipe;
A pump motor connected to the outflow pipe to increase the outflow of water from the water storage facility;
A tachometer for measuring the rotation speed of the pump motor;
A discharge valve connected to the outflow pipe for controlling the outflow of water;
Detecting means for detecting an open / closed state of the discharge valve;
Based on the measurement result of the water level meter, the measurement result of the flow meter, the measurement result of the tachometer, and the open / closed state of the discharge valve by the detection means, when there is no logical consistency between them, A driving support system comprising: a control unit that determines abnormality of the water level meter, the flow meter, the tachometer, or the detection unit and outputs the determination result. Storage means for storing table information for determining the logically consistent condition;
The driving support system according to claim 5, wherein the control unit is configured to determine the abnormality with reference to the table information. In a water treatment plant that includes a process that controls the inflow or outflow of water to a water storage facility,
A plurality of different water level gauges for measuring the water level of the water storage facility;
Provided when said deviation measurement result of the water level gauge has occurred by comparing the installation information of the same type of sensor to another point, and determining the control means whether abnormality in any of the water level indicator is generated A driving support system characterized by that. Each water level gauge is
The driving support system according to claim 7, wherein the driving support system is any one of an ultrasonic level meter, a capacitance level meter, a contact type level meter, a magnetostrictive level meter, or a throwing water level meter. In an operation support method applied to a water treatment plant including a process for controlling the inflow or outflow of water to a water storage facility,
A process of measuring the water level of the water storage facility;
A process for controlling the first valve means for controlling the inflow of water and the second valve means for controlling the outflow of water;
Detecting each open / closed state of the first and second valve means;
Based on the measurement result of the water level gauge and the detection result of the detection means, a logical consistency is obtained between the change in the water level of the water storage facility and the open / closed states of the first and second valve means. When there is not, the driving assistance method characterized by performing the procedure which has the process which determines the abnormality of the said water level gauge or the said detection means, and outputs the said determination result. In an operation support method applied to a water treatment plant including a process of distributing water from a water storage facility through an outflow pipe,
A process of measuring the water level of the water storage facility with a water level meter;
A process of measuring the water flow rate of the outflow pipe with a flow meter;
A process of measuring the number of rotations of a pump motor connected to the outflow pipe and increasing the outflow of water from the water storage facility with a tachometer,
A process connected to the outflow pipe to detect the open / closed state of a discharge valve for controlling the outflow of water by a detection means;
When the water level measurement result, the flow meter measurement result, the tachometer measurement result, and the discharge valve open / close state are not logically consistent, the water level meter, A driving support method comprising: executing a procedure including a process of determining an abnormality of the flow meter, the tachometer, or the detection means and outputting the determination result.

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