KR102500504B1 - Water level control system with predictive maintenance function according to water environment characteristic - Google Patents

Abstract

The present invention relates to a water level control system with a predictive maintenance function according to the characteristics of the water environment. Specifically, the present invention comprises: a water level sensor unit which is provided as a pressure-type water level sensor equipped with a water intake port for intake of raw water moving along a waterway, and is provided with a first water level sensor and a second water level sensor that functions to measure the water level by sensing the pressure of the raw water drawn through the water intake port and to measure the waveform of the pressure signal of the drawn raw water; a waveform analysis unit that receives the measured waveform of the raw water pressure signal from the water level sensor unit and compares and analyzes the waveform of the first water level sensor and the waveform of the second water level sensor; an error prediction unit that analyzes errors and predicts errors that may occur in the water level sensor unit in advance when an error is detected between the waveform for the pressure signal of the first water level sensor and the waveform for the pressure signal of the second water level sensor, as a result of performing the function of the waveform analysis unit; and a notification message transmitting unit that uses a communication module to send a notification message indicating the need for predictive maintenance for the water level sensor unit to a remote control center terminal, when an error in the water level sensor unit is predicted in advance in the error prediction unit.

Description

Water level control system with predictive maintenance function according to water environment characteristics

The present invention relates to a water level control system having a predictive maintenance function according to the characteristics of a water environment, and more specifically, a water level sensor by analyzing the water level of raw water taken from a waterway and a waveform of a pressure signal using a pressure type water level sensor. It is related to the technology of an instrumentation control system capable of pre-predictive maintenance that notifies the need to purify the water environment in the department so that a malfunction of the sensor due to sediment does not cause a problem in the operation of the pump, etc., and operates stably.

In general, a water level gauge that measures the water level is a device necessary for measuring the water level in places where water treatment is required, such as sewage pumping stations and reservoirs, or other industrial sites that require liquid management. , it is often used to continuously monitor and adjust the water level.

In general, the water level gauge is a thermal mass level gauge that measures the flow rate of a flowing fluid by measuring the power consumption of a heater as in Korean Patent No. 10-2190440, and transmits and receives ultrasonic waves as in Korean Patent No. 10-1906451 As in Korean Patent Registration No. 10-1568297, an ultrasonic level gauge that measures the water level, if a part of the pipe through which the fluid flows is reduced by using Bernoulli's law, the speed increases and the pressure increases when the fluid passes through that part. A differential pressure type water level gauge that converts the flow rate by using the fact that a certain relationship is established between the pressure difference between the front and back of the pipeline and the flow rate is mainly used, and the prior art related to such a level gauge measures the level as described above. Control technology that determines whether a different means or a water level level is a normal water level is mainstream.

However, in most conventional water level gauges, when the field of application, such as sewage and drainage, handles fluids containing a large amount of impurities, there is considerable error in analyzing the water level due to the accumulation of soil and the like in the level measuring means. did

On the other hand, in order to reduce the analysis error of the water level, the water level measuring means is cleaned periodically to maintain the water level measuring means. There is a need to develop a technology that reduces the number of unnecessary predictive maintenance and increases the efficiency of predictive maintenance work by detecting whether or not the predictive maintenance is performed.

Accordingly, the present invention analyzes the water level of the raw water taken from the waterway and the waveform of the pressure signal using a pressure-type water level sensor, and informs the water level sensor unit of the need to purify the water environment. A first object is to provide a water level control system having a predictive maintenance function according to the characteristics of the water environment as a kind of instrumentation control system capable of predictive maintenance in advance to prevent unreasonable operation of the pump, etc., and to ensure stable operation.

In addition, the present invention is directed to providing a technology for improving the predictive maintenance efficiency of the water level sensor unit by providing information on the predicted error to a remote control center terminal when an error that may occur in the water level sensor unit is predicted in advance. There is a second purpose.

In order to achieve the above object, having a predictive maintenance function according to the characteristics of the water environment implemented by a computing device including one or more processors according to an embodiment of the present invention and one or more memories for storing instructions executable by the processors The water level control system is a pressure-type water level sensor equipped with an intake port for taking in raw water moving along a waterway. a water level sensor unit having a first water level sensor and a second water level sensor that function to measure waveforms; a waveform analysis unit receiving a measured value of a waveform of a pressure signal of raw water from the water level sensor unit and comparing and analyzing a waveform of the first water level sensor and a waveform of the second water level sensor; As a result of performing the function of the waveform analyzer, when an error between the pressure signal waveform of the first water level sensor and the pressure signal of the second water level sensor is detected, the error is analyzed to predict an error that may occur in the water level sensor unit in advance. an error prediction unit that does; and a notification message transmitter for transmitting a notification message notifying that the water level sensor needs predictive maintenance to a remote control center terminal by using a communication module when the error prediction unit predicts an error with respect to the water level sensor unit in advance. to be

At this time, the above-described waveform analyzer, when receiving a measured value of the waveform of the pressure signal from the water level sensor unit, amplifies the measured value of the waveform by a predetermined magnification using a band pass filter, and then amplifies the first water level sensor and the second It is desirable to compare and analyze the waveform of the water level sensor.

In addition, the above-described water level sensor unit is installed on the waterway, and the first water level sensor and the second water level sensor are installed to be spaced apart from each other so as to have a critical height difference, and the first water level sensor is connected to the second water level sensor based on the bottom surface of the waterway. It is preferable to install it at a relatively lower height compared to

In addition, the above-described error prediction unit compares and analyzes the waveforms of the pressure signals of the first water level sensor and the second water level sensor, and compares and analyzes the waveforms of the pressure signals of the first water level sensor and the pressure signals of the second water level sensor. a first error analysis unit that analyzes an error for the waveform pattern represented by the signal; and a second error analysis unit that analyzes whether a phase difference occurs due to a phase delay as a result of comparing the waveform of the pressure signal of the first water level sensor with the waveform of the pressure signal of the second water level sensor. It is desirable to predict errors that may occur in the negative in advance.

In addition, the above-described first error analysis unit determines that the water level sensor unit is normally driven when the waveform patterns represented by the waveform of the first water level sensor and the waveform of the second water level sensor show sine wave behavior, and the waveform of the first water level sensor and when a behavior corresponding to the distortion waveform is detected in the waveform of the water level sensor unit including at least one of the waveforms of the second water level sensor, it is determined that the measured value of the water level sensor unit is in a state of being affected by any sediment It is desirable to judge

In addition, the above-described second error analyzer detects that a phase difference between the phase of the waveform of the pressure signal of the first water level sensor and the phase of the pressure signal of the second water level sensor is delayed for a critical time, and When it is detected that the maximum amplitude of the waveform for the pressure signal of the sensor exhibits an amplitude that is smaller than the maximum amplitude of the waveform for the pressure signal of the second water level sensor by less than a threshold criterion, the measured value of the first water level sensor is applied to any sediment. It is desirable to judge that it is in a state that is affected by

In addition, the above-described second error analyzer determines any sediment existing around the first water level sensor according to the delay time of the phase of the waveform with respect to the pressure signal of the first water level sensor and the phase delay time of the waveform with respect to the pressure signal of the second water level sensor. It is desirable to estimate the pore size for the pore to predict the type of any sediment.

In addition, the above-described notification message transmission unit includes data obtained by implementing the error for the water level sensor unit predicted in advance by the error prediction unit in a human machine interface (HMI) in the notification message, so that the remote control center terminal It is desirable to be able to establish a predictive maintenance plan for the water level sensor unit.

In addition, the water level control system having a predictive maintenance function according to the characteristics of the water environment includes a pump that functions to supply raw water to the waterway when an error for the water level sensor unit is predicted in advance by the error prediction unit, and the raw water towed by the pump. It is preferable to further include an instrumentation controller configured to prevent an error in the water level sensor unit by stopping driving of an element including at least one of valves controlling a supply flow rate.

In addition, the water level control system having a predictive maintenance function according to the characteristics of the water environment receives a first measurement value, which is a water level measurement value of a first water level sensor, and a second measurement value, which is a water level measurement value of a second water level sensor, to establish a waterway. A water level signal monitoring unit that calculates the water level level of the raw water moving along and monitors the water level signal of the waterway, and as a result of performing the functions of the error prediction unit and the water level signal monitoring unit, an error with respect to the water level sensor unit is predicted in advance. And, when a situation including at least one of a situation in which an error has occurred with respect to the water level sensor unit is detected, a PLC control unit for controlling the supply flow rate of raw water moving along the waterway based on a preset PLC control signal; further comprising It is desirable to do

According to an embodiment of the present invention, in the present invention, the pressure-type water level sensor is used to analyze the water level of the raw water taken from the waterway and the waveform of the pressure signal, and the water level sensor unit informs the need to purify the water environment to link it. It is possible to build an instrumentation control system capable of predictive maintenance that prevents unreasonable operation of pumps, etc., and ensures stable operation.

In addition, according to an embodiment of the present invention, an error that may occur in the water level sensor unit is predicted in advance to prevent failure of the water level sensor unit and increase maintenance efficiency of the water level sensor unit.

In addition, according to an embodiment of the present invention, when an error that may occur in the water level sensor unit is predicted in advance, information on the predicted error is provided to a remote control center terminal, and in particular, information about sediments around the water level sensor By providing the characteristic information, the control center terminal can establish a predictive maintenance plan for the water level sensor, thereby increasing predictive maintenance efficiency for the water level sensor unit.

In addition, according to an embodiment of the present invention, in the present invention, the water level sensor used in the water level control system having a predictive maintenance function according to the characteristics of the water environment has a compact structure, so that a person does not directly enter the waterway, such as a manhole It is possible to measure the water level in a waterway area having a narrow entrance, and it is possible to predict the occurrence of an error in the water level sensor unit in advance by determining whether any sediment exists around the water level sensor unit while measuring the water level.

In addition, according to an embodiment of the present invention, in the present invention, when the error prediction unit predicts an error for the water level sensor unit in advance, the instrumentation control unit controls the pump for supplying raw water to the waterway and the valve for controlling the supply flow rate of the raw water. By functioning to stop the driving, there is an effect of being able to minimize the occurrence of an error in the water level measurement value.

1 is a block diagram of a water level control system having a predictive maintenance function according to water environment characteristics according to an embodiment of the present invention.
2 is an example of water channel installation of a first water level sensor and a second water level sensor included in a water level sensor unit according to an embodiment of the present invention.
3 is experimental data for a waveform of a pressure signal for a normal driving pattern of a water level sensor unit according to an embodiment of the present invention.
4 and 5 are experimental data on the waveform of a pressure signal for predicting the occurrence of an error as the water level sensor is affected by sediment according to an embodiment of the present invention.
6 to 8 are experimental data showing a correlation by comparing waveforms of pressure signals in a trend line for a normal driving state and an error prediction state of the water level sensor unit according to an embodiment of the present invention.
9 is an example of an internal configuration of a computing device according to an embodiment of the present invention.

In the following, various embodiments and/or aspects are disclosed with reference now to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to facilitate a general understanding of one or more aspects. However, it will also be appreciated by those skilled in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings describe in detail certain illustrative aspects of one or more aspects. However, these aspects are exemplary and some of the various methods in principle of the various aspects may be used, and the described descriptions are intended to include all such aspects and their equivalents.

References to “embodiment,” “example,” “aspect,” “example,” etc., used in this specification should not be construed as indicating that any aspect or design described is preferable to or advantageous over other aspects or designs. .

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements and/or groups thereof. It should be understood that it does not.

In addition, terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are those commonly understood by those of ordinary skill in the art to which the present invention belongs. have the same meaning. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning not be interpreted as

The present invention relates to a water level control system having a predictive maintenance function according to the characteristics of a water environment. It is a type of instrumentation control system that enables advance predictive maintenance to ensure stable operation and to prevent the operation of related pumps due to malfunction of the sensor due to sediment by notifying the need for purification of the water environment in the sensor part. **The first purpose is to provide a water level control system with a predictive maintenance function according to gender, and when an error that can occur in the water level sensor unit is predicted in advance, information on the predicted error is provided to the remote control center terminal However, a second object is to provide a technique for increasing the predictive maintenance efficiency of the water level sensor unit.

Hereinafter, a detailed description of the present invention for achieving the above objects will be described with reference to the accompanying drawings, and a plurality of drawings may be simultaneously referenced to describe one or more technical features or components constituting the invention. will be.

First, referring to FIG. 1, a description of the water level control system 10 having a predictive maintenance function according to the characteristics of the water environment is provided. As a pressure-type water level sensor, the first water level sensor 111 and the second water level sensor function to measure the water level by sensing the pressure of the raw water taken in through the intake port and measure the waveform of the pressure signal of the water taken in. It includes a water level sensor unit 11 equipped with 112.

Specifically, the water level sensor unit 11 including at least one of the above-described first water level sensor 111 and the second water level sensor 112 may be provided as a float-shaped pressure type water level sensor. In the installation form, as shown in a and b of FIG. 2, the first water level sensor 111 and the second water level sensor 112 are spaced apart from each other on the same vertical line and installed at different heights, or the first water level sensor 111 and the The two water level sensors 112 may be spaced apart in a form having a critical horizontal distance and having different heights.

However, at this time, when the above-described first water level sensor 111 and second water level sensor 112 have a critical horizontal distance and are installed apart from each other in a form having different heights, the first water level sensor 111 and the second water level sensor ( 112) It is natural that the waveform of the pressure signal measured by the unit 11 may have a phase difference equal to a critical horizontal distance.

In addition, the above-described first water level sensor 111 may be installed to have a relatively lower height than the second water level sensor 112 when viewed from the bottom surface of the waterway. In this way, the first water level sensor ( 111) and the second water level sensor 112 are installed at different heights so that the differential pressure, which is the difference between the pressures measured by the first water level sensor 111 and the second water level sensor 112, is calculated to obtain raw water flowing in the waterway. It would be desirable to understand that this is because the water level can be calculated.

For example, the water level calculation method can be calculated by Bernoulli's law. After subtracting the second measurement value measured by the second water level sensor from the first measurement value of the first water level sensor 111, the density of the raw water It can be calculated by dividing the value multiplied by the gravitational acceleration.

Summarizing this by formula, it is assumed that the first measurement value measured by the first water level sensor for a fluid (raw water) having a constant density is defined as P1, and the second measurement value measured by the second water level sensor unit is defined as P2. When, P1-P2 = density (ρ) · gravitational acceleration (g) · water level (L) is defined as L = (P1 - P2) / ρ · g, and eventually density and gravitational acceleration For raw water, which is a constant fluid, it is possible to calculate the water level by using the differential pressure (ΔP) between P1 and P2.

Meanwhile, although not explicitly shown in FIG. 2, in another embodiment of the present invention, instead of separately providing the first water level sensor 111 and the second water level sensor 112, they are provided so as to have a height difference on one float , The water level of the raw water flowing in the waterway may be calculated using one pressure-type water level sensor by providing the upper water intake and the lower water intake of the float, but the present invention is not limited thereto.

Next, in the present invention, the measured value of the waveform of the pressure signal of the raw water is received from the above-described water level sensor unit 11, and the waveform of the pressure signal of the first water level sensor 111 and the second water level sensor 112 ) and a waveform analyzer 12 that compares and analyzes the waveform of the pressure signal.

Preferably, the above-described waveform analyzer 12 receives the measured value of the waveform of the pressure signal from the water level sensor unit 11 including at least one of the first water level sensor 111 and the second water level sensor 112. When necessary, the first water level sensor (111 ) and the waveform of the pressure signal of the second water level sensor 112 are compared and analyzed, and through this, a more precise waveform analysis result can be obtained.

On the other hand, in the present invention, as a result of performing the function of the above-described waveform analyzer 12, the error between the waveform of the pressure signal of the first water level sensor 111 and the waveform of the pressure signal of the second water level sensor 112 When is detected, an error prediction unit 13 is included to analyze the above-described error and predict an error that may occur in the water level sensor unit 11 in advance.

At this time, the above-described error prediction unit 13 compares and analyzes the waveforms of the pressure signals of the first water level sensor 111 and the second water level sensor 112, and compares the waveforms of the pressure signals of the first water level sensor 111 with , the first error analysis unit 12 that analyzes the error of the waveform pattern represented by the waveform of the pressure signal of the second water level sensor 112, and the waveform of the pressure signal of the first water level sensor 111 and the second As a result of comparing the waveform of the pressure signal of the water level sensor 112, a second error analysis unit 12 is included to analyze whether or not a phase difference occurs due to a phase delay, so that the first error analysis unit 12 and An error that may occur in the water level sensor unit 11 is predicted in advance by the second error analysis unit 12 .

More specifically, the above-described first error analyzer 12 determines that the waveform pattern represented by the waveform of the pressure signal of the first water level sensor 111 and the waveform of the pressure signal of the second water level sensor 112 is a sine wave. When the behavior of is shown, it is determined that the water level sensor unit 11 is normally driven, and at least one of the waveform of the pressure signal of the first water level sensor 111 and the waveform of the pressure signal of the second water level sensor 112 is determined. When a behavior corresponding to the distortion waveform is detected in the waveform of the water level sensor unit 11 including any one, to determine that the measured value of the water level sensor unit 11 is in a state affected by any sediment can function

As an example, referring to 100 in FIG. 3 as an experimental example for the normal operation of the water level sensor unit 11, 100 in FIG. 3 is when the water level sensor is applied to a waterway containing raw water in which no sediment exists. Waveforms of pressure signals measured by the first water level sensor 111 and the second water level sensor 112 are shown.

At this time, it can be understood that the first water level sensor 111 and the second water level sensor 112 are installed in a state vertically spaced apart on the same vertical line (that is, state a in FIG. 2). In this case, the first water level sensor 111 It can be seen that the waveform patterns of the pressure signals measured by the water level sensor 111 and the second water level sensor 112 have mutually similar patterns and behave like sine waves, and the peak phases of the waveforms show the same phase. can

Meanwhile, next, referring to 200 of FIG. 4 , in 200 of FIG. 4 , after the first water level sensor 111 is buried in mud and the second water level sensor 112 is submerged in water, the first water level sensor 111 is buried in the mud. An example of an experiment in which the waveform of the pressure signal of the sensor 111 and the waveform of the pressure signal of the second water level sensor 112 are compared is shown.

As shown in 200 of FIG. 4 , while the second water level sensor 112 submerged in water shows a sine wave behavior, in the case of the first water level sensor 111 buried in mud, the second water level sensor 112 It can be seen that the occurrence of a phase difference showing a delay time of t with the waveform of the pressure signal is detected, and that the sine wave exhibits a distorted waveform due to the harmonic alternating current component, as indicated by d1 to d4.

That is, in the case of the first water level sensor 111 buried in mud, not only cannot immediately respond to the behavior of the raw water caused by external stimuli because it is buried in mud, but also the external stimuli are partially offset by mud, so that the first water level sensor ( 111), it will be understood that it shows a behavior corresponding to the distortion waveform.

On the other hand, when the measurement of the first water level sensor 111 buried in the sediment of mud continues, the first water level sensor 111 may have a measurement error that cannot accurately measure the flow rate and water level of the waterway due to the mud, and further has a problem of causing a failure of the first water level sensor 111, so when the above error is detected, it is important to perform predictive maintenance on the water level sensor unit 11, and in the present invention, such a problem By performing the functions of the above-described second error analysis unit 12 together with the first error analysis unit 12, the predictive maintenance efficiency of the water level sensor unit 11 can be maximized.

Specifically, as a result of comparing the waveform of the pressure signal of the first water level sensor 111 and the waveform of the pressure signal of the second water level sensor 112, the second error analyzer 12 determines the phase according to the phase delay. An error can be detected by analyzing whether or not a difference has occurred, and in particular, the phase of the waveform for the pressure signal of the first water level sensor 111 is higher than the phase of the waveform for the pressure signal of the second water level sensor 112 during a critical time. It is detected that a delayed phase difference occurs, When it is detected that the maximum amplitude of the waveform of the pressure signal of the first water level sensor 111 is smaller than the maximum amplitude of the waveform of the pressure signal of the second water level sensor 112 by less than a threshold criterion, the first water level sensor detects (111) can function to determine that the measured value is in a state affected by any sediment.

At this time, the error due to the difference in maximum amplitude described above will not show a significant difference when the first water level sensor 111 and the second water level sensor 112 are under the same underwater condition, but the first water level sensor 111 is buried in mud, and when the second water level sensor 112 is submerged in water, the second water level sensor 111 is submerged in water by the mud around the first water level sensor 111. Since the air gap is relatively smaller than the air gap of (112), the first water level sensor 111 shows a relatively small maximum amplitude compared to the second water level sensor 112.

For example, when the maximum amplitude of the second water level sensor 112 submerged in water on a waterway with an external stimulus is 0.1 to 0.15 m, the maximum amplitude of the first water level sensor 111 buried in mud is 0.06 m. 2 It has been confirmed through experiments that the maximum amplitude is less than half of that of the water level sensor 112, and through this, it can be seen that the pore size of the sediment has a significant effect on the maximum amplitude.

Meanwhile, furthermore, the second error analysis unit 12 of the present invention delays the phase of the waveform of the pressure signal of the first water level sensor 111 and the phase of the waveform of the pressure signal of the second water level sensor 112. It may function to predict the type of a certain sediment by estimating the pore size of an arbitrary sediment existing around the first water level sensor 111 according to time.

As an example, referring simultaneously to FIG. 5 , in a of FIG. 5 , after the first water level sensor 111 is installed to be buried in mud, a waveform of a pressure signal measured by the first water level sensor 111 appears. In FIG. 5B, the first water level sensor 111 is installed to be buried in the mud, but by compacting the mud of FIG. The waveform of the pressure signal of the first water level sensor 111 measured in is shown, and in FIG. A waveform of a pressure signal of the first water level sensor 111 measured in the smaller mud is shown.

At this time, in a, b, and c of FIG. 5, the first water level sensor 111 is installed so as to be buried in the mud, and then the hardness of the mud is increased from a to b and c, so that the size of the air gap in the mud is gradually increased. When reduced to , it can be understood that this is the result of conducting an experiment to observe how the waveform of the pressure signal of the first water level sensor 111 changes.

On the other hand, as shown in a, b, and c of FIG. 5, as the size of the pores in the mud decreases due to the addition of the hardness of the mud, the shape of the sine wave is distorted and the irregularity increases, showing the behavior of the distortion waveform more frequently. It can be seen that the maximum amplitude also decreases from 0.06 m to 0.04 m and 0.01 m.

That is, according to the present invention, the degree of distortion of a sine wave and the change pattern of the maximum amplitude can be derived according to the size of the pores of any sediment, and through this, the type of any sediment existing around the water level sensor unit 11 ( or character) can be predicted (for example, whether it is a simple sediment or a hardened sediment over time).

Meanwhile, hereinafter, with reference to FIGS. 6 to 8 , the measurement result according to the water level measurement environment of the water level sensor unit 11 will be examined to find out the correlation of the water level measurement environment with the water level measurement result.

First, referring to FIG. 6, in a of FIG. 6, the first water level sensor 111 and the second water level sensor 112 are installed in the waterway, installed on the same vertical line, The result of measuring the waveform of the pressure signal is shown.

As shown in the graph shown in a of FIG. 6, both the first water level sensor 111 and the second water level sensor 112 show a pattern in which the amplitude of the waveform of the pressure signal gradually increases, and the water level of the raw water flowing in the waterway increases. It can be predicted that

Meanwhile, in b of FIG. 6, a graph showing the trend of the water level level is shown by using a of FIG. 6 as a coordinate point. When the measured value shows a positive correlation across the first and third quadrants, it is visually confirmed that the water level is increasing, and this visual data can be shared with the remote control center terminal 20 .

Next, referring to FIG. 7, in a of FIG. 7, the first water level sensor 111 and the second water level sensor 112 are installed in the waterway, but are not on the same vertical line, but are spaced apart by a critical horizontal distance and spaced by a critical vertical distance. , and the result of measuring the waveform of the pressure signal of the raw water in the absence of sediment is shown.

Referring to a of FIG. 7 , as the first water level sensor 111 and the second water level sensor 112 are horizontally spaced apart, a predetermined phase difference occurs, but the first water level sensor 111 and the second water level sensor 112 ) showed a gradual decrease in the amplitude of the waveform of the pressure signal, predicting that the water level of the raw water flowing in the waterway is decreasing.

Similarly, in b of FIG. 7, a graph showing the trend of the water level is shown by using a of FIG. 7 as a coordinate point. As the value shows a negative correlation across the 2nd and 4th quadrants, it is visually confirmed that the water level is slightly decreasing, and this visual data can be shared with the remote control center terminal 20 .

Meanwhile, as another embodiment, referring to FIG. 8, in FIG. 8A, the first water level sensor 111 and the second water level sensor 112 are installed in the waterway, but the first water level sensor 111 is buried in mud When the second water level sensor 112 is installed in a submerged state, the pressure of raw water flowing in the waterway in the water level sensor unit 11 including the first water level sensor 111 and the second water level sensor 112 The measurement result of the waveform for the signal is shown, and FIG. 8B shows a graph showing the trend of the water level by displaying a of FIG. 8 as a coordinate point.

As shown in b of FIG. 8 , when the day water level sensor (the first water level sensor 111 in the embodiment of FIG. 8 ) is affected by sediments including mud, the first water level sensor 111 and the second water level sensor ( 112), it can be seen that there is a considerable concern about the occurrence of errors in the measured value of the water level of the raw water flowing in the waterway.

That is, when sediments including mud are deposited around the water level sensor unit 11, the water level sensor unit 11 does not generate a normal pressure signal waveform, and accordingly, it is impossible to accurately measure the water level level. Accordingly, the present invention proposes a technology capable of timely notifying when predictive maintenance is required before direct failure of the water level sensor unit 11 by analyzing the waveform of the pressure signal of the water level sensor unit 11. Through this, there is an effect of minimizing the occurrence of errors in the water level sensor unit 11 and greatly improving maintenance efficiency of the water level sensor unit 11.

In addition, when waveforms of pressure signals as shown in a and b of FIG. 8 are sensed from the water level sensor unit 11, the error prediction unit 13 determines that the water level sensor unit 11 has a high possibility of error.

Meanwhile, as a result of performing the above-described error prediction unit 13, when an error with respect to the water level sensor unit 11 is predicted in advance, in the present invention, the water level sensor unit 11 is transmitted to the remote control center terminal 20 using a communication module. ) It is preferable to further include a notification message transmitter 14 (not shown) functioning to transmit a notification message notifying that predictive maintenance is required.

Preferably, the notification message transmission unit 14 described above transmits an error for the water level sensor unit 11 predicted in advance by the error prediction unit 13 to the notification message transmitted to the remote control center terminal 20 through the human machine interface. (HDMI, High Definition Multimedia Interface) by including data implemented, and by notifying the output means of the remote control center terminal 20 of the error prediction state of the water level sensor unit 11, the water level sensor unit 11 ) It may be possible to establish a predictive maintenance plan for, and the present invention is not limited thereto.

On the other hand, continuing the description with reference to FIG. 1, in the present invention, as schematically shown in FIG. 1, the water level control system having a predictive maintenance function according to the characteristics of the water environment analyzes the waveform of the pressure signal A water level signal monitoring unit 30 that monitors the water level measurement value measured by the water level sensor unit 11 and detects an error signal for the water level sensor may be included in addition to informing the need for purification of the water level sensor unit 11 .

Specifically, the water level signal monitoring unit 30 determines whether the water level sensor unit 11 is normally driven from the water level measurement values of the first water level sensor 111 and the second water level sensor 112 constituting the water level sensor unit 11. function to observe.

As an example, the water level signal monitoring unit 30 determines that the water level derived from the first measurement value of the first water level sensor 111 and the second measurement value of the second water level sensor 112 is at the zero level level. convergence, and when the error between the first measurement value and the second measurement value is less than a critical error (for example, 10%), it is determined that the water level sensor unit 11 is normally driven, and the first measurement value and the second measurement value When the error is greater than or equal to a critical error (eg, 10%), it may be determined that the water level sensor unit 11 is abnormally driven.

As another example, the water level signal monitoring unit 30 may configure the first measurement value of the first water level sensor 111 to be greater than 0 and the second measurement value of the second water level sensor 112 to converge to the zero level level. At this time, it is determined that the water level sensor unit 11 is normally driven, but the second measured value from the second water level sensor 112 converges to the zero level level and the first measured value from the first water level sensor 111 When the level value exceeds the height difference between the first water level sensor 111 and the second water level sensor 112, the second water level sensor 112 operates normally, but the first water level sensor 111 operates abnormally. It may be determined that the abnormal driving of the water level sensor unit 11 may be recognized.

As another example, the water level signal monitoring unit 30 determines that the first measurement value of the first water level sensor 111 is greater than the zero water level level and the second measurement value of the second water level sensor 112 is equal to or greater than the zero water level level. When it is determined that the water level sensor unit 11 is normally driven, a value obtained by subtracting the sum of the second measured value and the height difference between the first water level sensor 111 and the second water level sensor 112 from the first measured value. When the absolute value of exceeds the preset threshold value, it is determined that the second water level sensor 112 cannot perform the water level measurement for the case where the zero water level level or a minute measured value at the zero water level level is not performed, and the water level sensor It may be determined that the unit 11 is abnormally driven.

As another example, the water level signal monitoring unit 30 calculates the second measured value of the second water level sensor 112 from the first measured value of the first water level sensor 111 and the first water level sensor 111 and the second measured value. When the sum of the height differences of the water level sensor 112 exceeds a predetermined threshold value and the second measurement value is equal to or greater than the threshold value, the water level sensor unit 11 is abnormal. It can also be judged to be driven.

As another example, the water level signal monitoring unit 30 may use the second measured value when both the first measured value of the first water level sensor 111 and the second measured value of the second water level sensor 112 exist. When it is observed that the water level is increasing as the pressure of the gradual increase, while the pressure of the first measurement value is determined to be stagnant in the measurement value corresponding to one water level value, the first water level sensor 111 It may be determined that the water level sensor unit 11 is abnormally driven by determining that the measured value 1 is not functioning normally.

That is, the water level signal monitoring unit 30 of the present invention analyzes the behavior of the measured value measured by the water level sensor unit 11 in real time to quickly detect whether or not the water level sensor unit 11 is normally operated. do.

On the other hand, the monitoring result of the water level signal monitoring unit 30 is implemented as a human machine interface and outputs the monitoring result to a high-definition multimedia interface (HDMI) through a display provided in the remote control center terminal 20 to visualize it. This may be done and the present invention is not limited thereto.

Furthermore, when abnormal driving of the water level sensor 11 is detected as a result of performing the function of the water level signal monitoring unit 30, in the present invention, the supply flow rate of raw water moving along the waterway is determined by a predetermined PLC control signal. Accordingly, an abnormal driving situation may be transmitted to the PLC controller 40 that controls the PLC control module 401 so that a response may be made.

At this time, the above-described PLC control signal of the PLC control unit 40 controls the operation of the supply means for supplying raw water to the waterway based on the result of monitoring the water level signal of the raw water moving along the waterway in the water level signal monitoring unit 30. It can be understood as the concept of a control command set in

For example, the PLC control unit 40 of the present invention is a pump 4011 for pulling and supplying raw water stored in the storage tank 4010 to a waterway and a valve for controlling the supply flow rate of raw water pulled by the pump 4011 ( 4012), the PLC control unit 40 detects an error situation in which the water level sensor unit 11 is abnormally driven in the water level signal monitoring unit 30. Or, when a situation in which an error with respect to the water level sensor unit 11 is predicted in advance by the above-described error prediction unit is detected, the pump 4011 that functions to supply raw water to the waterway, and the raw water towed by the pump 4011 By stopping the operation of an element including at least one of the valves 4012 for controlling the supply flow rate of the water level sensor unit 11, a control for preventing an error from continuing or preventing a previously predicted error from occurring. that can give orders.

That is, according to this function, in the present invention, the pressure type water level sensor is used to analyze the water level of the raw water taken from the waterway and the waveform of the pressure signal, and the water level sensor unit 11 informs the need to purify the water environment. It is possible to achieve an effect of constructing an instrumentation control system capable of predictive maintenance in advance to prevent unreasonable operation of the pump 4011 and the like, and to ensure stable operation.

In addition, according to an embodiment of the present invention, errors that may occur in the water level sensor unit 11 are predicted in advance to prevent failure of the water level sensor unit 11 and to increase maintenance efficiency of the water level sensor unit 11. has the effect of

In addition, according to an embodiment of the present invention, when an error that may occur in the water level sensor unit 11 is predicted in advance, information on the predicted error is provided to the remote control center terminal 20, and in particular, the water level By providing characteristic information on sediments around the sensor, the control center terminal 20 can establish a predictive maintenance plan for the water level sensor, thereby increasing predictive maintenance efficiency for the water level sensor unit 11 .

In addition, according to an embodiment of the present invention, in the present invention, the water level sensor unit of the water level control system 10 having a predictive maintenance function according to the characteristics of the water environment has a compact structure, so that people do not directly enter and exit the waterway, It is possible to measure the water level in a waterway area having the same narrow entrance, and predict the occurrence of an error in the water level sensor unit 11 in advance by determining whether any sediment exists around the water level sensor unit 11 while measuring the water level. It has the effect of being able to.

In addition, according to one embodiment of the present invention, in the present invention, when an error with respect to the water level sensor unit 11 is predicted in advance by the error prediction unit 13, the instrumentation control unit supplies a pump for supplying raw water to the waterway, and the supply of raw water By functioning to stop the operation of the valve that controls the flow rate, there is an effect of being able to minimize the occurrence of an error in the water level measurement value.

As described above, although the embodiments have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description.

On the other hand, referring to FIG. 9, FIG. 9 illustrates an example of the internal configuration of a computing device according to an embodiment of the present invention, and in the following description, the description of FIGS. 1 to 8 and Descriptions of redundant and unnecessary embodiments will be omitted.

As shown in FIG. 9, a computing device 10000 includes at least one processor 11100, a memory 11200, a peripheral interface 11300, an input/output subsystem ( It may include at least an I/O subsystem (11400), a power circuit (11500), and a communication circuit (11600). In this case, the computing device 10000 may correspond to a user terminal connected to the tactile interface device (A) or the aforementioned computing device (B).

The memory 11200 may include, for example, high-speed random access memory, magnetic disk, SRAM, DRAM, ROM, flash memory, or non-volatile memory. there is. The memory 11200 may include a software module, a command set, or other various data necessary for the operation of the computing device 10000.

In this case, access to the memory 11200 from other components, such as the processor 11100 or the peripheral device interface 11300, may be controlled by the processor 11100.

Peripheral interface 11300 may couple input and/or output peripherals of computing device 10000 to processor 11100 and memory 11200 . The processor 11100 may execute various functions for the computing device 10000 and process data by executing software modules or command sets stored in the memory 11200 .

Input/output subsystem 11400 can couple various input/output peripherals to peripheral interface 11300. For example, the input/output subsystem 11400 may include a controller for coupling a peripheral device such as a monitor, keyboard, mouse, printer, or touch screen or sensor to the peripheral interface 11300 as needed. According to another aspect, input/output peripherals may be coupled to the peripheral interface 11300 without going through the input/output subsystem 11400.

The power circuit 11500 may supply power to all or some of the terminal's components. For example, power circuit 11500 may include a power management system, one or more power sources such as a battery or alternating current (AC), a charging system, a power failure detection circuit, a power converter or inverter, a power status indicator or power It may contain any other components for creation, management and distribution.

The communication circuit 11600 may enable communication with another computing device using at least one external port.

Alternatively, as described above, the communication circuit 11600 may include an RF circuit and transmit/receive an RF signal, also known as an electromagnetic signal, to enable communication with another computing device.

The embodiment of FIG. 9 is just one example of the computing device 10000, and the computing device 11000 may omit some of the components shown in FIG. 9, further include additional components not shown in FIG. It may have a configuration or arrangement combining two or more components. For example, a computing device for a communication terminal in a mobile environment may further include a touch screen or a sensor in addition to the components shown in FIG. , Bluetooth, NFC, Zigbee, etc.) may include a circuit for RF communication. Components that may be included in the computing device 10000 may be implemented as hardware including one or more signal processing or application-specific integrated circuits, software, or a combination of both hardware and software.

Methods according to embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computing devices and recorded in computer readable media. In particular, the program according to the present embodiment may be configured as a PC-based program or a mobile terminal-only application. An application to which the present invention is applied may be installed in a user terminal through a file provided by a file distribution system. For example, the file distribution system may include a file transmission unit (not shown) that transmits the file according to a request of a user terminal.

The device described above may be implemented as a hardware component, a software component, and/or a combination of hardware components and software components. For example, devices and components described in the embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), It may be implemented using one or more general purpose or special purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. A processing device may run an operating system (OS) and one or more software applications running on the operating system.

A processing device may also access, store, manipulate, process, and generate data in response to execution of software. For convenience of understanding, there are cases in which one processing device is used, but those skilled in the art will understand that the processing device includes a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that it can include. For example, a processing device may include a plurality of processors or a processor and a controller. Other processing configurations are also possible, such as parallel processors.

Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. You can command the device. Software and/or data may be any tangible machine, component, physical device, virtual equipment, computer storage medium or device, intended to be interpreted by or to provide instructions or data to a processing device. may be permanently or temporarily embodied in Software may be distributed on networked computing devices and stored or executed in a distributed manner. Software and data may be stored on one or more computer readable media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like.

Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved. Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

Claims (10)

A water level control system having a predictive maintenance function according to characteristics of a water environment implemented by a computing device including one or more processors and one or more memories storing instructions executable by the processors,
A pressure-type water level sensor equipped with an intake port for taking in raw water moving along a waterway, measuring the water level by sensing the pressure of the raw water taken in through the intake port and measuring the waveform of the pressure signal of the intake water. a water level sensor unit provided with a first water level sensor and a second water level sensor;
A waveform analysis unit receiving a measured value of a waveform of a pressure signal of the raw water from the water level sensor unit and comparing and analyzing a waveform of the pressure signal of the first water level sensor and a waveform of the pressure signal of the second water level sensor. ;
As a result of performing the function of the waveform analyzer, the waveform of the water level sensor unit including at least one of the waveform of the pressure signal of the first water level sensor and the waveform of the pressure signal of the second water level sensor is not a sine wave behavior. When a behavior corresponding to the distortion waveform is detected, it is determined that the measured value of the water level sensor is affected by any sediment including mud, and the water level sensor is determined to be affected by any sediment including mud. an error prediction unit that predicts the occurrence of errors in advance;
When the error prediction unit predicts the occurrence of an error in the water level sensor unit due to any deposits including mud, it is necessary to perform predictive maintenance on the water level sensor unit in a remote control center terminal using a communication module. A water level control system having a predictive maintenance function according to the characteristics of the water environment, characterized in that it includes; a notification message transmitter for transmitting a notification message to inform.
According to claim 1,
The waveform analysis unit,
When the measured value of the waveform of the pressure signal is received from the water level sensor unit, after amplifying the measured value of the waveform by a predetermined magnification using a band pass filter, the first and second water level sensors A water level control system having a predictive maintenance function according to the characteristics of the water environment, characterized in that the waveform for the pressure signal is compared and analyzed.
According to claim 1,
The water level sensor unit,
It is installed on the waterway, and the first water level sensor and the second water level sensor are installed to be spaced apart from each other to have a critical height difference, and the first water level sensor is connected to the second water level sensor based on the bottom surface of the waterway. A water level control system having a predictive maintenance function according to the characteristics of the water environment, characterized in that it is installed at a relatively lower height.
According to claim 3,
In the error prediction unit,
Compare and analyze waveforms of pressure signals of the first water level sensor and the second water level sensor;
a first error analyzer that analyzes an error according to whether the waveform of the pressure signal of the first water level sensor and the waveform of the pressure signal of the second water level sensor exhibit sine wave behavior; and,
A second error analysis unit that analyzes an error between an amplitude represented by a waveform of the pressure signal of the first water level sensor and a waveform of the pressure signal of the second water level sensor; A water level control system having a predictive maintenance function according to water environment characteristics, characterized in that it predicts.
delete According to claim 4,
The second error analysis unit,
When it is detected that the maximum amplitude of the waveform of the pressure signal of the first water level sensor is smaller than the maximum amplitude of the waveform of the pressure signal of the second water level sensor by less than a threshold criterion, the measurement of the first water level sensor A water level control system having a predictive maintenance function according to water environment characteristics, characterized in that it determines that the value is in a state affected by any sediment.
According to claim 6,
The second error analysis unit,
When an error between the maximum amplitude of the waveform of the pressure signal of the first water level sensor and the maximum amplitude of the waveform of the pressure signal of the second water level sensor is detected,
A pore size of the arbitrary sediment existing around the first water level sensor is estimated according to an error value, and the type of the arbitrary sediment is predicted. Water level control having a predictive maintenance function according to characteristics of the water environment system.
According to claim 1,
The notification message sending unit,
In the notification message, by including data obtained by implementing the error of the water level sensor unit predicted in advance by the error prediction unit with a human machine interface (HMI), the remote control center terminal can detect the water level sensor unit. A water level control system having a predictive maintenance function according to the characteristics of the water environment, characterized in that it is possible to establish a predictive maintenance plan for.
According to claim 1,
The water level control system having a predictive maintenance function according to the characteristics of the water environment,
When the error prediction unit predicts an error for the water level sensor unit in advance,
By stopping the operation of an element including at least one of a pump that functions to supply raw water to the waterway and a valve that controls the supply flow rate of the raw water drawn by the pump, the occurrence of an error in the water level sensor unit is prevented. A water level control system having a predictive maintenance function according to water environment characteristics, characterized in that it further comprises a;
According to claim 1,
The water level control system having a predictive maintenance function according to the characteristics of the water environment,
The water level of the waterway is calculated by receiving the first measurement value, which is the water level measurement value of the first water level sensor, and the second measurement value, which is the water level measurement value of the second water level sensor, and calculating the water level level of the raw water moving along the waterway. Further comprising a water level signal monitoring unit for monitoring the signal,
When a situation including at least one of a situation in which an error in the water level sensor unit is predicted in advance and a situation in which an error in the water level sensor unit occurs is detected as a result of performing functions of the error prediction unit and the water level signal monitoring unit The water level control system having a predictive maintenance function according to the characteristics of the water environment, characterized in that it further comprises;

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