KR102243912B1 - Smart pipe network management flow meter suitable for establishing a response system for urban flooding and sensing environmental information - Google Patents

Abstract

Regardless of the case of full or obese pipes, the flow rate and water level can be accurately sensed and the flow rate can be measured from this, and while minimizing the number of sensors, it enables precise flow measurement, and at the same time, sensing not only the flow rate but also the harmful substances in the manhole. It provides a technology that enables integrated management of piping by allowing it to be performed together. To this end, the smart pipe network management flow meter suitable for establishing a system for responding to urban inundation according to an embodiment of the present invention and capable of sensing environmental information is a radar-type first flow rate sensor that measures the flow rate in a non-contact method with the fluid at the top of the fluid. And, a first flow rate measurement unit for measuring the flow rate of the pipe based on the measured flow rate and water level, including a first water level sensor for measuring the water level by the ultrasonic method; A second flow sensor of ultrasonic cross-collation method that is deposited in the fluid and measures the flow rate of the fluid, and a second level sensor and a second level sensor that calculates and measures the level of the fluid according to the pressure value of the pressure sensor that senses the pressure from the fluid. The flow rate of the pipe is measured based on the flow rate and water level measured from the flow rate sensor and the second water level sensor, and the water level value measured from the second level sensor is divided into a preset number of fluid sections, and the second of the divided fluid sections. A second flow rate measurement unit including a flow rate calculator configured to measure the flow rate of the entire fluid using the flow rate of the section to which one fluid section belongs, measured by the flow rate sensor, and the water level and pressure of each fluid section; And when the pipe is obese, the flow measured by the first flow rate measurement unit is determined as the final flow rate, and when the pipe is full, the flow rate measured by the second flow rate measurement unit is determined as the final flow rate. 2 It characterized in that it comprises a; a control unit for determining whether the obesity pipe and the full pipe according to the water level value of the pipe measured by the water level sensor.

Description

Smart pipe network management flow meter suitable for establishing urban flood response system and capable of sensing environmental information {SMART PIPE NETWORK MANAGEMENT FLOW METER SUITABLE FOR ESTABLISHING A RESPONSE SYSTEM FOR URBAN FLOODING AND SENSING ENVIRONMENTAL INFORMATION}

The present invention relates to a technology for detecting the flow rate of a fluid that is installed in a water supply and sewage pipe and flows inside the pipe, and specifically, regardless of the case of a full pipe or an obese pipe, the flow rate and water level can be accurately sensed and the flow rate can be measured therefrom. In addition, it relates to a technology that enables precise flow rate measurement while minimizing the number of sensors and simultaneously senses not only the flow rate but also harmful substances in a manhole.

Measuring the flow rate of a fluid flowing inside a pipe is an essential technology for designing water and sewage systems in an area through measurement of an average flow rate in an ordinary time, as well as preventing accidents such as damage to the pipe and preparing for flood or drought. Typical methods for measuring fluid flowing inside a pipe include a method that applies a volume type, a turbine type, a differential pressure type, a vortex type, an electronic type, a radar type, an ultrasonic type, etc., and a method such as a Coriolis type that measures the mass. The flow meter adopting the medium ultrasonic method is a measuring device that uses ultrasonic waves generated by the sensor, and has been widely applied throughout the field of measuring the amount of fluid at present.

Among these, the radar flowmeter can be measured when the pipe is obese, but there is a problem that it is impossible to measure the flow rate when the radar flowmeter is flooded.In the case of an ultrasonic flowmeter, when the fluid flows irregularly or the water level is not constant, There is a problem that it is difficult to reflect this.

Thus, as a conventional prior art, in Korean Patent Registration No. 10-1617652, etc., by attaching a sensor composed of an ultrasonic receiving/transmitting unit to a plurality of points, dividing each area inside the pipe and measuring the flow velocity for it, respectively, A function that calculates the flow rate multiplied by the cross-sectional area of the area is posted.

However, this type of measuring device has a problem in that it is difficult to reflect this when the fluid flows irregularly or the water level is not constant in that it is an ultrasonic flow meter. In addition, as the number of installed sensors increases, it is difficult to install and maintain, and due to the nature of sensors that measure one line with a pair of receiving and receiving parts, it is not possible to measure the flow rate value of the corresponding area due to a failure of one sensor. There is this.

Accordingly, the present invention enables precise flow measurement regardless of obesity and fullness, and minimizes the number of sensors in adopting a flow measurement method with very high precision compared to the conventional ultrasonic method or radar method. One object is to provide a technology capable of reducing cost compared to the existing high-precision measurement method by enabling precise measurement while still being possible.

In addition, another object of the present invention is to provide a technology capable of integrated management in a pipe by sensing environmental information and transmitting it to a remote management server in addition to flow measurement.

In order to achieve the above object, a smart pipe network management flow meter suitable for building an urban flood response system according to an embodiment of the present invention and capable of sensing environmental information, is a radar method that measures the flow velocity in a non-contact method with the fluid at the top of the fluid. A first flow rate measurement unit for measuring the flow rate of the pipe based on the measured flow rate and water level, including a first flow rate sensor and a first water level sensor measuring a water level by an ultrasonic method; The second flow sensor of the ultrasonic cross-collation method that is deposited in the fluid and measures the flow velocity of the fluid, the second level sensor that calculates and measures the level of the fluid according to the pressure value of the pressure sensor that senses the pressure from the fluid, and the second flow rate sensor. 2 Measure the flow rate of the pipe based on the flow rate and water level measured from the flow rate sensor and the second water level sensor, but divide the water level value measured from the second water level sensor into a preset number of fluid sections, and divide the fluid section A second flow rate measurement unit including a flow rate calculator configured to measure the flow rate of the entire fluid using the flow rate of the section to which one fluid section belongs, measured by the second flow rate sensor, and the water level and pressure of each fluid section; And when the pipe is obese, the flow rate measured by the first flow rate measurement unit is determined as the final flow rate value, and when the pipe is full, the flow rate measured by the second flow rate measurement unit is determined as the final flow rate value, and the first water level It characterized in that it comprises a; a sensor and a control unit for determining whether the obese pipe or full pipe according to the water level value of the pipe measured by the second water level sensor.

The first flow rate measurement unit, the first flow rate sensor measures the flow rate according to the wavelength change when the radar irradiated from the light emitting unit is incident on the light receiving unit as a result of reflection of the fluid, and the first water level sensor is generated from the ultrasonic generator. It is preferable to sense the water level based on the time until the ultrasonic wave is incident on the ultrasonic receiver.

The flow rate calculation unit has a flow rate of the one fluid section measured by the second flow rate sensor, a water level and pressure calculated and measured by the second water level sensor as input values, and a correlation function having a flow rate of each fluid section as an output value After deriving the flow rate of each fluid section by inputting the water level and pressure of each fluid section to the, the average of the flow rates of all fluid sections is calculated as the average flow rate of the fluid, and the water level measured from the second level sensor and the pre-stored pipe It is preferable to calculate the result of multiplying the average flow rate by the cross-sectional area of the fluid calculated from the cross-sectional area of, as the flow rate of the entire fluid.

It is preferable that the second water level sensor calculates the level of the fluid in proportion to the pressure value according to size data of a pipe in which a preset pressure sensor is installed.

The association function is proportional to the pressure sensed by the pressure sensor, and a first output value that is inversely proportional to the flow velocity of the one fluid section and the center water level of each fluid section is calculated as the acceleration of the fluid, and the first output value is time. It is preferable that it is a first function that derives the result of integration as the flow velocity of each fluid section.

A hazardous substance sensing unit installed in the pipe and sensing an amount of a toxic substance including at least hydrogen sulfide; the control unit further includes, and the control unit includes, together with the determined final flow rate value, the harmful substance sensed by the toxic substance sensing unit. It is desirable to transmit the substance data to a remote management server.

The control unit, when the water level value measured from the second water level sensor exceeds a threshold value preset for each pipe, the flow rate measured from the second flow rate sensor exceeds a threshold flow rate preset for each pipe, and the When at least one of a case in which the water level value measured by the second water level sensor exceeds the immersion threshold value, and the concentration of the toxic substance sensed by the toxic substance sensing unit exceeds a preset critical concentration, the pipe It is preferable to generate the accident occurrence information from and transmit it to the management server.

According to the present invention, in the case of obesity, it is possible to accurately grasp the flow rate by sensing the flow rate and water level by using a radar measurement type flow rate sensor and an ultrasonic type water level sensor that can be mounted on the top, while using a radar measurement and ultrasonic method by a full tube. Therefore, when it is impossible to measure the flow rate and water level, respectively, the flow rate can be measured by accurately sensing the flow rate and water level using the flow rate sensor of the ultrasonic cross-collation method and the water level sensor of the pressure sensing method.

In particular, by using a pressure sensing type water level sensor, a single sensor is used to divide the fluid flow area into a number of sections according to the water level, and the flow rates in multiple sections are accurately predicted using Q-Curve and related functions. After that, it is possible to measure the flow rate using this.

As a result, it is possible to measure more precise flow rate than when using a plurality of sensors, and at the same time, it is possible to measure the flow rate with high precision even when the pipe is obese or full, thereby reducing cost and achieving the effect of measuring flow rate at the same time. have.

In addition, since the above-described configurations can be used by dividing the flow rate measurement unit into an obese tube and a full tube, the flow rate measurement units can be installed respectively on the top and wall of the pipe, thereby minimizing the effect of projection and foreign matter flowing from the outside. There is.

In addition, since continuous measurement without loss is possible during flow measurement, it is possible to generate a three-dimensional graph for confirming an accurate flow rate shape and pattern, so that the usability of the measurement data is greatly improved.

On the other hand, since a sensor that can monitor harmful substances in the pipe is used together and data can be managed in a remote server, there is an effect that enables integrated monitoring and damage prevention and prediction in the event of flooding.

1 is a configuration and layout diagram of a smart pipe network management flow meter suitable for establishing a system for responding to urban inundation according to an embodiment of the present invention and capable of sensing environmental information.
2 is an example of conversion of measurement data utilization by a control unit according to an embodiment of the present invention.
3 is a view for explaining an example of a Q-Curve used to implement an embodiment of the present invention.
4 is a view for explaining an example in which a fluid section is divided according to an embodiment of the present invention.
5 and 6 are diagrams for explaining a flow in which a flow rate and a total flow rate of one fluid section are inferred according to the implementation of each embodiment of the present invention.
7 is a view for explaining an example in which data is managed in a remote management server according to another embodiment of the present invention.

In the following, various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for illustrative purposes, a number of specific details are disclosed to aid in an overall understanding of one or more aspects. However, it will also be appreciated by those of ordinary skill in the art that this aspect(s) may be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of the one or more aspects. However, these aspects are illustrative and some of the various methods in the principles of the various aspects may be used, and the descriptions described are intended to include all such aspects and their equivalents.

As used herein, "embodiment", "example", "aspect", "example", etc. may not be construed as having any aspect or design described as being better or advantageous than other aspects or designs. .

In addition, the terms "comprising" and/or "comprising" mean that the corresponding feature and/or component is present, but excludes the presence or addition of one or more other features, components, and/or groups thereof. It should be understood as not doing.

In addition, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed 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. It has the same meaning. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning Is not interpreted as.

Meanwhile, in the following description, some of the components are omitted or excessively enlarged or reduced in order to describe the functions of each component of the present invention, but the corresponding illustrated matters refer to the technical features and rights of the present invention. It will be understood that it is not intended to limit the scope.

In addition, in the following description, a plurality of drawings will be simultaneously referred to and described in order to describe one technical feature or constituent elements constituting the invention.

1 is a configuration and layout diagram of a smart pipe network management flowmeter suitable for establishing a system for responding to urban inundation according to an embodiment of the present invention and capable of sensing environmental information. 3 is a view for explaining an example of a Q-Curve used for implementation of an embodiment of the present invention, and FIG. 4 is a diagram for explaining an example in which fluid sections are divided according to the implementation of an embodiment of the present invention. 5 and 6 are diagrams for explaining the flow in which the flow rate and the total flow rate of one fluid section are inferred according to the implementation of each embodiment of the present invention, and FIG. 7 is a remote management server according to another embodiment of the present invention. It is a diagram for explaining an example in which data is managed.

First, referring to FIG. 1, a smart pipe network management flow meter suitable for building an urban flood response system and capable of sensing environmental information according to an embodiment of the present invention includes a first flow rate measurement unit 10, a second flow rate measurement unit 20, and The control unit 30 may be included, and in an additional embodiment, a hazardous substance sensing unit 40 may be further included.

It is preferable that the 1st flow rate measurement part 10 is comprised including the 1st flow rate sensor 11 and the 1st water level sensor 12 as shown in FIG. 1 etc. The second flow rate sensor 11 and the first water level sensor 12 may be provided in the same housing as shown in FIG. 1 and the like.

The first flow rate sensor 11 refers to a radar type sensor that measures the flow rate in a non-contact method with the fluid at the top of the fluid. The radar-type flow velocity sensor according to an embodiment of the present invention may mean, for example, a microwave radar flow velocity sensor or other radar (light wave) flow velocity sensor. When the first flow rate sensor 11 is the microwave radar flow rate sensor described above, when the downward vertical angle with respect to the surface of the fluid is defined as 90 degrees as shown in FIG. 1, the radar irradiated from the light emitting unit at an incidence angle of about 30 to 50 degrees (microwave When) is scattered from the surface of the fluid and is incident on the light-receiving unit, for example, the wavelength changed by the Doppler effect, etc., is measured, and the surface flow velocity can be calculated from this.

In addition to the above-described examples, the first flow rate sensor 11 irradiates light, measures the light reflected (scattered) by the surface of the fluid or particles in the fluid, and The flow rate is measured.

Meanwhile, similar to the first flow rate sensor 11, the first water level sensor 12 is a non-contact method with the fluid at the top of the fluid, and performs a function of measuring the water level by, for example, an ultrasonic method.

The first water level sensor 12 may be composed of, for example, an ultrasonic distance sensor. By transmitting ultrasonic waves from the ultrasonic generator to the vertical downward direction, ultrasonic waves reflected by the surface of the fluid are incident at the ultrasonic receiver, The water level is measured according to the time difference and the specified pipe specifications.

In this case, in addition to the ultrasonic distance sensor, it will be natural that various types of distance sensors such as a radar method, a laser method, a load cell method, and a nuclear method may be included in the first water level sensor 12.

When the flow velocity and the water level are detected from the first flow rate sensor 11 and the first water level sensor 12, the first flow rate measurement unit 10, in a processor provided separately from each sensor, flow rate (Q) = cross-sectional area (A) The result of measuring the flow rate is calculated through the formula of x flow rate (V). At this time, the cross-sectional area (A) can be calculated as A = r (radius of pipe)^2(C (center angle)-sinC)/2 for a circular pipe, and C = 2(cos^-1((rh)/ This flow rate calculation method can be equally applied to the second flow rate measurement unit 20 to be described later in addition to the first flow rate measurement unit 10.

On the other hand, the second flow rate measurement unit 20 uses the values measured by the second flow rate sensor 21 and the second water level sensor 22 and the second flow rate sensor 21 and the second water level sensor 22 as a flow rate. It is a configuration that includes a processor (not shown) for measuring.

The second flow rate sensor 21 refers to an ultrasonic cross-collation type sensor that is deposited in a fluid and measures the flow rate of the fluid. In the present invention, the cross-collation type ultrasonic sensor is configured to have a different inclination angle when the above-described fluid surface and the downward vertical angle are defined as 90 degrees, as shown in FIG. 1.

Specifically, the second flow rate sensor 21 measures the flow velocity of the fluid through the position and movement of the particles in the pipe. The location of is checked, and the velocity of the fluid is determined through the location and velocity of the particle by measuring the velocity of the particle according to the frequency difference.

In order to increase accuracy, FIG. 1 shows that the second flow rate sensor 21 is one, but for example, the second flow rate sensor 21 in one housing is composed of a first ultrasonic sensor and a second ultrasonic sensor. I can. For example, the first ultrasonic sensor is installed to generate ultrasonic waves in a direction opposite to the flow direction of the fluid, that is, in the same direction as the second flow rate sensor 21 of FIG. 1, and the second ultrasonic sensor is the same as the flow direction of the fluid. It may be installed to generate ultrasonic waves in the direction. Through this, the average value of the flow velocity measured by the first and second ultrasonic sensors may be recognized as the average value of the flow velocity of the fluid in the current pipe. In this case, compared to the conventional Doppler-type ultrasonic flow sensor, it is possible to measure the position and velocity of the particles in a plane unit, so that the accuracy may be improved.

That is, each of the ultrasonic sensor units is set and installed in an inclined direction rather than a vertical direction with respect to the flow of the fluid, so that the range of the transceiving area of the ultrasonic wave can be widened. That is, since the movement measurement range of the foreign material can be set to be wide, the flow velocity of the foreign material in the unit of a line or a certain plane is measured. Specifically, by measuring the velocity of the particles in a plane, there is an advantage that it is not limited to a single particle, and thus more precise measurement of the flow velocity is possible.

Meanwhile, the second water level sensor 22 performs a function of calculating and measuring the level of the fluid in proportion to the pressure value of the pressure sensor that senses the pressure from the fluid. When the specification (diameter) of the pipe and the density of the fluid are identified, the principle that the level of the fluid (cross-sectional area) can be calculated in proportion to the pressure of the fluid applied to a pressure sensor installed in a part of the pipe is used.

At this time, the flow rate calculation unit (not shown) including the processor of the second flow rate measurement unit 20 calculates the flow rate of the pipe based on the flow rate and water level measured from the second flow rate sensor 21 and the second water level sensor 22. However, the water level value measured from the second water level sensor 22 is divided into a preset number (for example, 16) of fluid sections, and one fluid measured from the second flow rate sensor (2!) among the divided fluid sections. This is a detailed configuration of the second flow rate measurement unit 20 that performs a function of measuring the flow rate of the entire fluid using the flow rate of the section to which the section belongs, and the water level and pressure of each fluid section.

At this time, in the conventional prior art described above, in order to measure the flow velocity of the divided fluid section, a plurality of ultrasonic transmission/reception modules are installed in the pipe to measure the flow velocity of each fluid section. Accordingly, the determined flow rate is calculated according to each cross-sectional area to calculate and sum the flow rate of each portion, or the total flow rate is calculated by calculating the cross-sectional area to the average value of the determined flow rate.

However, as described above, such a conventional prior art is capable of precise measurement, but since a number of sensors must be attached, the complexity increases, and installation and maintenance are difficult. In addition, due to the characteristic of a sensor that performs one-line measurement with a pair of receiving and transmitting portions, there is a disadvantage in that it is impossible to measure the flow velocity value of a corresponding area due to a failure of one sensor.

In contrast, the second flow rate sensor 21 of the present invention uses a single ultrasonic collation type flow rate sensor and infers the flow rate in a region divided into a plurality of sections through precise calculations. It is to provide a technology that enables flow velocity measurement with close accuracy.

This will be described with reference to 3 to 6. Referring to the above drawings together, first, as shown in FIG. 3, the flow rate Q may be inferred as a curve value having a constant curvature according to the water level H in the pipe 1 under the same flow rate and pressure.

At this time, in the present invention, since the flow rate value measured by the second flow rate measurement unit 20 after full pipe is determined as the final flow rate value, assuming full pipe, the pipe 1 is 16 fluids as shown in FIG. It can be divided into sections A1 to A16. Of course, in the case of going beyond the full pipe to the submerged stage, the section is divided again, or the flow rate at the time of full pipe and the measured value of a third water level sensor (not shown) that can be installed in the manhole (2), and the lower portion of the manhole (2). The flow rate can be calculated according to the size of the connecting pipe.

At this time, the flow velocity (VA1 ~ VA16) in each fluid section (A1 ~ A16) is calculated using a single sensor as described above, and the average flow velocity (Avg(VAn)) is calculated based on this, as shown in FIG. As described above, as the flow rate measurement formula, the total flow rate Dt is calculated as a value obtained by multiplying the total cross-sectional area St by the average flow rate Avg (VAn).

At this time, specifically, as shown in Figs. 1, 4 and 5, the flow velocity VA5 of one fluid section A5 and C is measured in a plane unit, etc. by the above-described cross-collation method from the second flow rate sensor 21. And the water level and pressure calculated and measured from the second water level sensor 22 as input values, and the water level and pressure of each fluid section are input to the associated function having the flow rate of each fluid section as an output value. Derive the flow rate of After that, the average of the flow rates of all fluid sections is calculated as the average flow rate of the fluid, and the result of multiplying the cross-sectional area of the fluid and the average flow rate calculated from the water level measured from the second level sensor 22 and the cross-sectional area of the previously stored pipe It is calculated by flow rate.

At this time, the correlation function is a process of calculating the flow rate after full pipe, and is proportional to the pressure P sensed from the pressure sensor as shown in FIG. 5, and the flow velocity (Vg) of one fluid section (A5) and the center of each fluid section ( In the case of A4, as shown in Fig. 5 (PA4), the first output value inversely proportional to the water level is calculated as the acceleration of the fluid, and the result of integrating the first output value with time is derived as the flow velocity (Van) of each fluid section. 1 can mean a function.

In general, in a fluid-related function, the fluid acceleration (g) is calculated as g = P/ρH, where P is the pressure and H is the water level (height from the lowest surface of the fluid). Using this, but the flow velocity (Vg) of one fluid section is a state in which the pressure and water level in the fluid section are determined by using the above-described association function, so the constant ρ can be calculated by inverse computation of the association function. By applying it to the function of calculating the acceleration of the fluid, it is possible to derive the first function among the related functions.

If only the flow velocity in one fluid section is measured using this, the flow velocity in the remaining fluid section can be calculated relatively very accurately, and the total flow rate can be calculated using the average value and water level thereof.

On the other hand, the control unit 30 determines the flow rate measured by the first flow rate measurement unit 10 when the pipe 1 is obese (A) as the final flow rate value, and when the pipe 1 is full (B) the second flow rate measurement unit ( 20) to determine the flow rate measured by the final flow rate, but the function of determining whether the pipe is obese or full according to the water level of the pipe measured by the first water level sensor 11 and the second water level sensor 22. Carry out.

That is, as shown in Fig. 2, the switching circuit 31 will be included in the control unit 30 to determine whether the pipe 1 is full or obese, but the first water level sensor 12 is a non-contact type sensor as described above. , Since the second water level sensor 22 includes a pressure sensor 23, the first water level sensor 12 operates only when the pipe 1 is obese (A) and the measured water level will be derived, The second water level sensor 22 operates only when the pipe 1 is full (B), so that the measured value of the water level will be derived.

At this time, when the water level is not measured by the first water level sensor 12 or the height of the pipe 1 is equal to or greater than the height of the pipe 1 due to reaching full pipe, the switching circuit 31 is used as the second flow measurement unit. The value measured from (20) is determined as the final flow rate value. Conversely, since it is an obesity pipe, when the water level is not measured by the second water level sensor 22, that is, when the pressure measured by the pressure sensor 23 is 0 (the pressure sensor 23 is the pipe 1 ), or when the pressure measured by the pressure sensor 23 is less than the threshold value Pt (when the pressure sensor 23 is installed on the side of the pipe 1, unlike FIG. 1), The switching circuit 31 determines the value measured by the first flow rate measurement unit 10 as the final flow rate value.

Basically, when measuring the flow rate using only a single ultrasonic collation sensor, the sensor will be installed on the lower surface of the pipe (1) for accurate measurement in the above-described obese pipe. In this case, the sensor is caused by foreign substances in the pipe (1). The measured value of may be inaccurate.

However, in the present invention, since the flowmeters 10 and 20 of a different method are used for obesity and full pipes, respectively, the second flow measurement unit 20 including an ultrasonic collation sensor is located on the lower surface of the pipe 1 It is not necessary to be installed on the top and side, it is possible to prevent the occurrence of an error in the measurement value due to foreign matter in the pipe (1).

In addition, since continuous measurement without loss is possible during flow measurement, it is possible to generate a three-dimensional graph for confirming an accurate flow rate shape and pattern, so that the usability of the measurement data is greatly improved.

Meanwhile, in the present invention, the harmful substance sensing unit 40 may be further included as described above. The toxic substance sensing unit 40 includes a plurality of sensors 41 that perform a function of sensing the amount of toxic substances including at least hydrogen sulfide, as shown in FIG. 7. Specifically, as shown in FIG. 1, the toxic substance sensing unit 40 is installed near the manhole 2 because it is generated from the fluid and mainly senses toxic substances such as hydrogen sulfide, which may be a problem when the worker breathes. desirable.

In this case, as shown in FIG. 7, the control unit 30 is the final flow rate value determined according to the values measured by the first flow rate measurement unit 10 and the second flow rate measurement unit 20 according to the above-described embodiment. In addition, the hazardous substance data sensed by the hazardous substance sensing unit 40 may be transmitted to the remote management server 50.

In this embodiment, if an accident warning notification about flooding is transmitted to the management server 50 according to the amount and flow rate of harmful substances, accident prediction and early response may be possible along with various data history management.

To this end, as described above, in addition to the final flow rate value and hazardous substance data, the control unit 30 determines that when the water level value measured by the second water level sensor 22 exceeds a preset flooding threshold value for each pipe 1, 2 When the flow rate measured from the flow rate sensor 21 exceeds a preset critical flow rate for each pipe 1, and the water level value measured from the second water level sensor 22 exceeds the immersion threshold value, and a hazardous substance sensing unit In at least one of the cases in which the concentration of the hazardous substance sensed by 40 exceeds a preset threshold concentration, it is preferable to generate information about the occurrence of an accident from the pipe 1 and transmit it to the management server 50. In this case, it is possible to manage various data history on hazardous substances along with an alarm function when a disaster occurs.

As described above, although the embodiments have been described by the limited embodiments and drawings, those of ordinary skill in the art will understand that various modifications and variations are possible from the above description. The terms such as "include", "comprise" or "have" described above mean that components without a description to the contrary may be included, and thus other components are not excluded. It should be construed as more inclusive. In addition, the scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (7)

Measures the flow rate of the pipe based on the measured flow rate and water level, including a radar-type first flow rate sensor that measures the flow rate in a non-contact method with the fluid from the top of the fluid, and a first water level sensor that measures the water level by an ultrasonic method. A first flow rate measurement unit;
The second flow rate sensor of the ultrasonic cross-collation method that is deposited in the fluid and measures the flow rate of the fluid, the second level sensor that calculates and measures the level of the fluid according to the pressure value of the pressure sensor that senses the pressure from the fluid, and the second flow rate sensor. 2 Measure the flow rate of the pipe based on the flow velocity and water level measured from the flow velocity sensor and the second water level sensor, but divide the water level value measured from the second water level sensor into a preset number of fluid sections, and divide the fluid section A second flow rate measurement unit including a flow rate calculator configured to measure the flow rate of the entire fluid using the flow rate of the section to which one fluid section belongs, measured by the second flow rate sensor, and the water level and pressure of each fluid section; And
When the pipe is obese, the flow rate measured by the first flow rate measurement unit is determined as the final flow rate, and when the pipe is full, the flow rate measured by the second flow rate measurement unit is determined as the final flow rate value, and the first water level sensor And a control unit for determining whether an obese pipe or a full pipe is determined according to a water level value of the pipe measured by the second water level sensor,
The flow rate calculation unit,
The flow rate of the one fluid section measured from the second flow rate sensor, the water level and pressure calculated and measured from the second water level sensor are input values, and the flow rate of each fluid section is used as an output value. After deriving the flow rate of each fluid section by inputting the water level and pressure, the average of the flow rates of all fluid sections is calculated as the average flow rate of the fluid, and the water level measured from the second level sensor and the previously stored sectional area of the pipe are calculated. The result of multiplying the cross-sectional area of the fluid by the average flow rate is calculated as the flow rate of the entire fluid,
The second water level sensor,
Calculate the fluid level in proportion to the pressure value according to the size data of the pipe with a preset pressure sensor installed,
A harmful substance sensing unit installed in the pipe and sensing an amount of a toxic substance including at least hydrogen sulfide; further comprising,
The control unit,
A smart pipe network management flow meter suitable for establishing an urban inundation response system and capable of sensing environmental information, characterized in that transmitting the hazardous substance data sensed by the hazardous substance sensing unit together with the determined final flow rate value to a remote management server.

The method of claim 1,
The first flow rate measurement unit,
The first flow velocity sensor measures the flow velocity according to the wavelength change when the radar irradiated from the light emitting unit is incident on the fluid as a result of being reflected on the fluid, and the first water level sensor is the ultrasonic wave generated from the ultrasonic generator is incident on the ultrasound receiving unit. A smart pipe network management flow meter suitable for building an urban flood response system characterized by sensing the water level based on the time until hour and capable of sensing environmental information.
delete delete The method of claim 1,
The association function,
A first output value that is proportional to the pressure sensed by the pressure sensor and inversely proportional to the flow velocity of the one fluid section and the center water level of each fluid section is calculated as the acceleration of the fluid, and the result of integrating the first output value with time is each A smart pipe network management flow meter suitable for building an urban flood response system and capable of sensing environmental information, characterized in that it is the first function derived from the flow velocity of the fluid section.
delete The method of claim 1,
The control unit,
When the water level value measured from the second water level sensor exceeds a preset threshold value for immersion for each pipe, the flow rate measured from the second flow rate sensor exceeds a preset critical flow rate for each pipe, and the second water level sensor An accident from the pipe occurs in at least one of a case in which the water level measured from exceeds the immersion threshold value, and the concentration of the toxic substance sensed by the toxic substance sensing unit exceeds a preset critical concentration. Smart pipe network management flowmeter suitable for building an urban flood response system and capable of sensing environmental information, characterized in that information is generated and transmitted to the management server.

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