KR20160045203A - Smart valve control system - Google Patents

Abstract

The present invention relates to a smart valve control system, and more particular to a smart valve control system which can correctly calculate the quantities of spout water based on the degree of opening of each valve for the quantity of spout water and the set degree of opening and supply a desired quantity of spout water to each spout hole. The smart valve control system comprises: an input unit which inputs information about the quantity of intake water of a water storage tank and information about the quantity of required spout water of each spout hole of an irrigation network; a storage unit which stores the information input via the input unit and set information about the degree of opening of a valve of each spout hole; a calculation unit which calculates loss of head for the quantity of required spout water of each spout hole based on the information input via the input unit, and calculates the degree of opening of the spout valve and the quantity of spout water for the degree of opening of the spout valve by using the calculated loss of head; an output unit which outputs the information calculated by the calculation unit; and a control unit which compares the degree of opening calculated by the calculation unit with the set degree of opening, controls the valve so that the valve operates at the set degree of opening without manipulation of the valve of the spout hole if there is no spout hole in which a difference larger than an allowable error occurs, compares the quantity of spout water calculated based on the calculated degree of opening with the quantity of required water to find occurrence of a difference if there is a spout hole in which a difference between the calculated degree of opening and the set degree of opening is equal to or larger than the allowable error, and controls an operation of the valve by adjusting the degree of opening of the spout water valve having a large difference if the difference is found to be equal to or larger than the allowable error.

Description

[0001] SMART VALVE CONTROL SYSTEM [0002]

The present invention relates to a smart valve control system, and more particularly to a smart valve control system for controlling a valve opening amount so that a water manager can estimate and supply an optimal supply amount to a water storage amount for each customer who desires to supply water .

In terms of the difficulty of paper purchase and the efficient use of water resources, the number of districts designing irrigation canals as irrigation water is increasing. In the irrigation canal, when the valve is operated in order to manage the quantity of water per fraction, the sulfur of the other part of the water fluctuates. Because of the nature of the irrigation water, it is not easy for the water manager to manage the valve opening to irrigate the target quantity of water. Can not be done.

In this way, since proper management of the valve opening can be found only after trial and error for a long time, there is a problem that the valve must be inconvenient for a long time in the field.

Patent No. 10-0813608

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and it is an object of the present invention to provide an apparatus and a method for accurately calculating a flow rate by a valve opening degree and a set opening degree with respect to a minute quantity of multi- And to provide a smart valve control system capable of controlling a valve so as to supply water.

In order to achieve the above object, the smart valve control system of the present invention comprises an input unit for inputting the amount of water withdrawn from a storage tank and required quantity information in each water hole of a related network; A storage unit for storing information inputted through the input unit and predetermined valve opening information of the valves of the respective fractions; A calculating unit for calculating a loss head for a required fraction in each of the plurality of fractions through information input through the input unit and calculating a fractional valve opening and a fractional flow rate for the fractional valve opening using the calculated loss head; An output unit for outputting information calculated by the calculation unit; Wherein the control unit controls the valve unit so as to operate at a predetermined opening degree without performing valve operation of the fractional valve when no difference between the calculated opening degree and the predetermined opening degree calculated by the calculating unit is greater than or equal to the tolerance, The control unit controls the operation of the valve by adjusting the opening degree of the fractional valve having a large difference when the difference is found to be larger than the required demand amount, ; And

According to the smart valve control system of the present invention, unlike the prior art, when the manager inputs the water quantity required by the farmer by the water level of the water source (reservoir) and the water supply hole of the related network, So that water can be supplied by a desired amount.

Therefore, it is possible not only to prevent the waste of water, but also to supply the required quantity of water according to the number of water supply, so that it can respond to the demand of the farmer appropriately and as a result, the maintenance cost can be reduced, It is possible to supply the water, which is advantageous in that the environment for growing the crop can be maintained in the best condition and the productivity can be increased.

FIG. 1 is a schematic block diagram of a smart valve control system according to an embodiment of the present invention. Referring to FIG.
2 is a view for explaining a network to which a smart valve control system according to an embodiment of the present invention is applied.
3 is a flowchart illustrating a method of controlling a valve using a smart valve control system according to an embodiment of the present invention.

Hereinafter, a smart valve control system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, a smart valve control system 200 according to an embodiment of the present invention is installed to supply water from a water supply source (storage tank) 10 to a required site 40 (fields, rice fields, etc.) Branch lines 51, 52, 53, 54 and 55 branched from the water channel 20 and having branching holes 51a.52a, 53a, 54a, 55a ..., branching lines 51, A plurality of valves 51b, 5b2, 53b, 54b and 55b provided for each of the water supply passages 20 and the water supply passages 30 The valves 51b, 5b2, 53b, 54b and 55b of the operating network 100 are operated to control the flow rate of the required quantity of water required by the respective branch holes 51a.52a, 53a, 54a, 55a ... So that the water can be supplied.

The valve control system 200 includes an input unit 210 for inputting the amount of water withdrawn from the storage tank 10 and required quantity information in the respective minute holes 51a.52a, 53a, 54a and 55a, and an input unit 210 A storage unit 220 storing information on the valves and the fractions of the related network 100 (the amount of opening of each valve and the amount of discharge from each of the fractions), the calculating unit 230, the output unit 240, A valve driving unit 250, and a control unit 260.

The input unit 210 may include a computer device or the like and the water manager checks the water level sensor 11 of the storage tank 10 of the direct network 100 and inputs a water level value (water level). In addition, the water manager inputs the amount of water requested by the farmers through the input unit 210 for each of the factions 51a.52a, 53a, 54a, 55a in the destination 40. [

The information transmitted from the water manager terminal 281 or the farmer terminal 283 may be received by the communication unit 270 through the network communication network and received by the input unit 210 to receive the received information.

The entire system information of the network 100 is stored in the storage unit 220, and information input through the input unit 210 is stored. That is, the valves 51b, 5b2, 53b, 54b, and 54b, which are preliminarily set in the divisions 51a.52a, 53a, 54a, and 55a of the respective destinations 40 of the network 100, 55b are stored.

The calculation unit 230 calculates and calculates the loss factor for the required quantity of water for each of the fractional holes 51a.52a, 53a, 54a, and 55a. That is, the calculation unit 230 calculates the loss head of each fractional flow with respect to the fractional flow rate (required amount) of the fractional flow, and calculates the valve opening degree with respect to the fractional flow rate. Based on the calculated valve opening, the fractional flow rate of the substantial fraction can be calculated. The information calculated by the calculation unit 230 is provided to the control unit 260. [

The output unit 240 includes a display unit and the like so that information calculated by the calculation unit 230 is displayed together with information of the network 100 so that the water manager can easily confirm the information.

The valve driving unit 260 controls opening and closing operations of the valves 51b, 5b2, 53b, 54b and 55b based on a control signal transmitted from the control unit 260. [ In this case, the valve driving unit 260 may receive the control signal of the control unit 260 through a network communication network or a wired network. As described above, the valves 51b, 5b2, 53b, 54b, and 55b are maintained in the initially set opening state by driving the valve driving unit 260, or the opening amount can be controlled to correspond to the modified opening amount.

The control unit 260 compares the calculated opening degree calculated by the calculation unit 230 with the predetermined opening degree to calculate the fractional flow rate using the valve opening degree calculated for the large difference between the minute and large differences, When there is a large difference between the flow rate of the fraction calculated by the calculated valve opening degree and the demanded amount, the opening degree of the subsidiary ball is adjusted by adjusting the opening of the corresponding fractional valve and the valve 51b, 5b2, 53b , 54b, and 55b to supply the water.

Here, the method for calculating the valve opening degree by the calculation unit 130 may be performed in the following order.

1) Calculation of fraction flow (Q)

2) Calculation of valve loss head (H _v )

3) Calculation of valve loss factor (f _v )

4) Calculation of valve opening (θ)

The calculation of the loss head by the flow boundary and the flowmeter by the water level boundary can use the nodal head method. The basic equation of the irrigation channel is composed of the continuous equation of arbitrary nodes and the relation of flow and head between arbitrary nodes a and b. The average flow rate formula can be the Hazen-Williams formula, which is an empirical formula commonly used in waterworks irrigation. The average flow rate formula is expressed by the equation relating to flow rate as follows.

<1> Flow calculation through steady flow analysis

Q = 0.27853 CD ^{2 .83} ? H _C ^{0 .54} L ^-0.54 ... (1 -One)

Wherein, Q: flow rate (㎥ / s), C: number of current meter, D: diameter (m), △ H _C ; Friction loss head (m), and L: length of pipeline (m). When the pipe connects the nodes a and b, equation (1-1) becomes as follows.

_{Q ab = 0.27853 C ab D ab} 2 .63 △ H cab 0 .54 L ab -0.54 = K ab (E a -E b) 0.54 ....... (1-2)

In this case, K _ab = 0.27853 C _ab D _ab ^{2 .63} ΔH _cab ^{0 .54} L _ab ^-0.54 , ΔH _cab ^{0 .54} = E _a -E _b , E _a and E _b are the energy of the nodes a and b , And Q _{ab is the} channel flow rate (m 3 / s).

The relationship between the flow rate and the loss head in the case where an elbow or the like is present in the duct between arbitrary nodes a and b is as follows.

^{_{Q ab = 3.477 f bab -0.5 D}} ab 2 △ H bab 0 .5 = M ab (E a -E b) 0.5 ........... (1-3)

Where M _ab = 3.477 f _bab- ^0.5 D _ab , △ H _bab = E _a - E _b , Q _ab : Curved flow rate (㎥ / s), f _bab : Curvature loss coefficient, and △ H _bab : Curved loss head (m).

If there are several elbows in the channel section, the calculation can be easily done by considering the coefficients of one section as the sum of the respective coefficients. If there is a valve between arbitrary sections a and b, the relationship between flow rate and loss head is as follows.

Q _ab = 3.477 f _vab ^-0.5 D _ab ² ? H _vab ^{0 .5} = N _ab (E _a -E _b ) ^0.5 (1-4)

Where Nab = 3.477 f _v ^-0.5 D _ab ² , ΔH _vab = E _a - E _b , Q _{ab is the} valve flow (m 3 / s), f _{vab is the} valve loss factor, and △ H _{vab is the} curved tube loss head (m).

Since the equations (1-2) to (1-4) are nonlinear with respect to E _ab and E _b , they are linearized according to the so-called Dakaku method and approximated to the problem of the simultaneous linear equations concerning E _ab and E _b , E _ab and E _b can be obtained by law. The calculated flow is repeated until the allowable error is satisfied until the continuous condition of each node is satisfied.

<2> Calculation method of valve loss head (H _v )

The valve loss head is calculated by subtracting the friction loss and the local loss head from the difference between the water level and the downstream water level in the upstream of the irrigation water.

Here, H _o = maximum water level (m), H _i = end level of bunsugong (m), △ H _v of the neck: the valve head loss (m), △ H _cj: friction head loss (m), △ H _pk: J is the suffix indicating the channel section, k is the suffix indicating the local loss head, nc is the number of pipelines, and na is the number of local losses.

The above calculation makes it possible to easily calculate the complex irrigation system by applying the network calculation. Next, the relationship between the loss head of the valve and the loss coefficient can be expressed by the following equation.

Here, H _{v is the} minimum water level (m), f _{v is the} valve loss coefficient (m), v is the average flow velocity (m / s), and g is the gravitational acceleration (= 9.8 m / s ² ).

The relationship between the opening degree (?) Of the valve and the loss coefficient (f _v ) is often shown in tables or figures by the manufacturer. In order to obtain the valve opening degree by the program, that is, the calculating section 230, It is necessary to prepare the equation (expression).

The characteristic equation of the valve can be expressed by a relational expression of the loss coefficient (f _v ) and the opening degree (?), But it can be expressed by the following expression in a section where linear approximation is possible.

f _v =? x 10 ^?? ... (1-8)

α and β are obtained by substituting the loss factors f _v1 and f _v2 at the openings θ ₁ and θ ₂ into the equation (1-8) and converting the log to logarithmic equations for α and β. By solving this simultaneous equations, α and β can be obtained and different values are shown depending on the type of valve.

The valve opening degree? (%) Can be obtained by modifying Equation (1-8).

As described above, the calculation unit 230 calculates the fractional flow rate, the valve loss head, the valve loss coefficient, and the valve loss coefficient by using the data input through the input unit 210 and the equations (1-1) to (1-9) And the valve opening degree can be calculated.

Hereinafter, a method for determining and operating the valve opening of the pertinent network 100 using the valve control system 200 having the above-described configuration will be described in detail.

1 to 3, the water manager inputs the amount of water withdrawn from the water source and the required water amount per fraction by the input unit 210 (S10). That is, the manager inputs the water level of the water source (storage tank), and then inputs the amount of water requested by the farmers for each water hole.

Then, the calculating unit 230 calculates the loss head for the required quantity of water for each of the submarines with the input information and the information stored in the storage unit 220 (S11). In other words, the loss head from the source to the end is calculated by the steady flow analysis. The valve loss head can be calculated by subtracting various loss heads from irrigation water obtained by steady flow analysis in the water level difference between the water level in the water source and the water level in the water space.

Next, the calculation unit 230 calculates the opening of the fractional valve using the calculated loss head and displays the calculated opening of the fractional valve by the display unit of the output unit 240 (S12). That is, the valve opening degree obtains the value obtained by converting the valve loss head to the valve loss coefficient, and the characteristic equation of the loss coefficient and opening degree for each valve type.

The control unit 260 compares the opening calculated in the step S12 with the predetermined opening stored in the storage unit 220 and determines whether there is a difference between the opening calculated in the step S12 and the predetermined opening stored in the storage unit 220 (S13).

If it is determined in step S13 that there is no fractional difference exceeding the tolerance between the calculated flow rate and the predetermined opening degree, the control unit 260 does not operate the flood valve (S14).

Then, the control unit 260 transmits the opening operation signal of the valves to the valve driving unit 250 according to the calculated opening degree (pre-set opening degree) to control the driving of the valve so that the required amount of water is supplied to each of the water discharging holes (S15) .

On the other hand, if the difference between the calculated opening and the predetermined opening degree is larger than the tolerance in the step S13, the water manager inputs the valve opening value, i.e., the calculated opening degree, in which the difference is large, to the input unit 210 (S16).

Then, the calculation unit 230 calculates the fractional flow rate of the input opening degree input in the step S16 and provides the calculated flowrate to the control unit 260 (S17).

The control unit 260 compares the calculated flow rate calculated in the step S17 with the required minute quantity, and checks whether there is a valve with a large difference (S18).

If there is no valve having a large difference in the comparison result in the step S18, the step S15 is performed to control the valve so that the water supply is performed by the required amount of water.

Conversely, if it is determined in step S18 that there is a valve having a large difference between the required minute quantity and the calculated flow rate, the control unit 260 adjusts the opening of the large fractional valve (S19). Here, in step S19, the water manager may directly adjust the opening of the fractional valve through the input unit 210 to input the adjusted value.

If it is determined that there is no valve having a large difference between the required quantity of water and the calculated flow rate, the flow rate of the fractional flow for the opening adjustment value is calculated again in step S19, and then the flow of steps S18 and S19 is repeated. The opening operation is performed.

As described above, according to the smart valve control system 200 according to the embodiment of the present invention, the valve opening degree corresponding to a large number of factions of the network 100 can be analyzed in an optimum state, that is, A minute quantity is calculated so as to supply minute quantities and the valve opening degree for satisfying the calculated minute quantity is set and controlled so that it is possible to efficiently manage without requiring waste of water while satisfying the required minute quantity demanded by the farmer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will readily appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

100 .. Related network 200 .. Smart valve control system
210 .. input unit 220 .. storage unit
230 output unit 240 output unit
250 .. Valve drive unit 260 .. Control unit

Claims (2)

An input unit for inputting the amount of water withdrawn from the storage tank and the required quantity information in each branch of the network;
A storage unit for storing information inputted through the input unit and predetermined valve opening information of the valves of the respective fractions;
A calculating unit for calculating a loss head for a required fraction in each of the plurality of fractions through information input through the input unit and calculating a fractional valve opening and a fractional flow rate for the fractional valve opening using the calculated loss head;
An output unit for outputting information calculated by the calculation unit;
Wherein the control unit controls the valve unit so as to operate at a predetermined opening degree without performing valve operation of the fractional valve when no difference between the calculated opening degree and the predetermined opening degree calculated by the calculating unit is greater than or equal to the tolerance, The control unit controls the operation of the valve by adjusting the opening degree of the fractional valve having a large difference when the difference is found to be larger than the required demand amount, And a control system for controlling the valve. The method according to claim 1,
Wherein the valve loss head is calculated using the following equation (1-5).
[Mathematical Expression]

Here, H _o = maximum water level (m), H _i = end level of bunsugong (m), △ H _v of the neck: the valve head loss (m), △ H _cj: friction head loss (m), △ H _pk: Where n is the number of pipelines, and na is the number of localized losses, respectively. In this case, the number of pipelines is the number of pipelines.

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