KR20110138834A - Apparatus for measuring non-full flow using multiple sensors and the measuring method thereof - Google Patents

Apparatus for measuring non-full flow using multiple sensors and the measuring method thereof Download PDF

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KR20110138834A
KR20110138834A KR1020100058957A KR20100058957A KR20110138834A KR 20110138834 A KR20110138834 A KR 20110138834A KR 1020100058957 A KR1020100058957 A KR 1020100058957A KR 20100058957 A KR20100058957 A KR 20100058957A KR 20110138834 A KR20110138834 A KR 20110138834A
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South Korea
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flow rate
water level
sensor
flow
signal
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KR1020100058957A
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Korean (ko)
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KR101208330B1 (en
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혁 재 이
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주식회사 우진
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/54—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by means of chains, flexible bands or wires introduced into and moved by, the flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/001—Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)

Abstract

PURPOSE: Device and method for manufacturing the flow rate of a complex partly-filled-pipe are provided to enable easy installation of an electronic flow-meter and one water level sensor to simultaneously measure flow rate in a PB flume way and in an electronic way. CONSTITUTION: A device for manufacturing the flow rate of a complex partly-filled-pipe comprises a PB flume(10), a pair of water level sensors(20), a flow-speed sensor(22), and a control unit(30). The PB flume consists of an inlet unit, a straw unit(14), and an outlet unit, starting from where fluid flows. The water level sensors are installed on the bottom of the inlet unit. The flow-speed sensor is installed on the crest unit of the straw unit. The control unit receives a detecting signal from the water level sensor and the flow-speed sensor and measures flow rate. Signals related to water levels are input from the water level sensors.

Description

복합식 비만관 유량측정 장치 및 측정방법{Apparatus for measuring non-full flow using multiple sensors and the measuring method thereof}Apparatus for measuring non-full flow using multiple sensors and the measuring method

본 발명은 비만관 유량계를 이용한 유량측정에 관한 것이며, 더욱 상세하게는 하수관에 흐르는 유량을 측정하는 장치 및 방법에 관한 것이다.The present invention relates to a flow rate measurement using an obesity pipe flow meter, and more particularly, to an apparatus and a method for measuring a flow rate flowing in a sewer pipe.

종래의 액체용 유량계는 거의 산업용으로 발달하여 배관중에 만관 상태로 흐르는 액체의 양을 측정하였다. 그러나, 공해 문제가 발생함에 따라 20여년 전부터 공장배수의 수질 종량 규제가 실시되고, 하수처리장의 유지관리가 중요시되면서 공장배수, 하수 등의 개수로 등의 비만관(非滿管)의 유량을 측정할 필요성이 대두되었다.Conventional liquid flowmeters have been developed almost industrially to measure the amount of liquid flowing in a full tube state in a pipe. However, due to pollution problems, the amount of water quality of plant drainage has been regulated since 20 years ago, and the maintenance of the sewage treatment plant is important, so the flow rate of obesity pipes such as plant drainage and sewage can be measured. The need to do so emerged.

비만관의 유량을 측정하는 유량계로는 PB 플륨식 비만관 유량계 또는 전자식 비만관 유량계 등이 있다.As a flowmeter for measuring the flow rate of the obesity tube, there is a PB plume type obesity tube flow meter or an electronic obesity tube flow meter.

종래 사용되는 PB 플륨식 비만관 유량계는 배관 안에 삽입하는 방식으로 설치가 편리하고, 또한 수위계만으로 유량측정이 가능하고 속도센서가 필요없다는 장점이 있다.Conventionally used PB plume obesity tube flowmeter is easy to install by inserting into the pipe, and also has the advantage that it is possible to measure the flow rate only with a water gauge and does not require a speed sensor.

반면, PB 플륨식 비만관 유량계는 측정원리가 차압을 이용하므로 유속흐름을 방해하는 구조이어서 입구에 퇴적물이 쌓인다거나, 특정한 설치조건이 있어서 이 조건을 만족하지 않으면 측정의 정밀도가 떨어지는 문제점 등이 있다.On the other hand, the PB plume obesity tube flowmeter has a problem that the measurement principle uses a differential pressure, which prevents the flow of the flow, so that sediment accumulates at the inlet, or there is a problem of inaccurate measurement if the condition is not satisfied due to a specific installation condition. .

또한, 전자식 비만관 유량계는 전도성 유체의 경우에는 특성에 관계없이 모두 측정이 가능하고, 유속분포에 따른 측정 정밀도가 우수하고, 자기장에 의한 측정원리이기 때문에 퇴적물의 영향이 없다는 등의 장점이 있다.
In addition, the electronic obesity tube flowmeters can measure all of the conductive fluids regardless of their characteristics, have excellent measurement accuracy according to the flow rate distribution, and because of the principle of measurement by the magnetic field, there is no effect of deposits.

반면, 전자식 비만관 센서, 즉 수위센서 및 속도센서가 배관의 상하에 부착되어 있어 배관 안에 삽입하지 못하고 맨홀 바닥 공사를 통하여 설치하여야 한다.On the other hand, an electronic obesity tube sensor, that is, a water level sensor and a speed sensor, is attached to the upper and lower sides of the pipe and cannot be inserted into the pipe.

전자식 비만관 유량계는 성능은 우수하나, 전자유속센서가 하단에 돌출되어 있어 맨홀에서 토목공사를 해야 하는 설치의 어려움이 있고, 측정 센서들의 고장으로 인하여 유량측정이 안될 경우 대체할만한 장치가 설치되어 있지 않다.The electronic obesity tube flowmeter has excellent performance, but there is a difficulty in installation that requires civil engineering work in the manhole because the magnetic flux sensor protrudes at the bottom, and there is no substitute device if the flow rate measurement is not possible due to the failure of the measuring sensors. not.

즉, 맨홀에 들어가서 공사를 하여야 하고, 속도센서의 수리교환이 어렵고, 설치시 크레인과 같은 중장비 필요하다는 문제점이 있었다.That is, the construction must be entered into the manhole, difficult to repair and replace the speed sensor, there was a problem that heavy equipment such as a crane is required for installation.

본 발명은 PB 플륨식 유량계와 전자식 유량계가 수위센서가 있어야 유량을 측정할 수 있다는 공통점을 이용하여, 기존의 전자식 비만관 유량계의 구조를 변경하여 설치 및 측정 성능향상을 이루려 하는데 그 목적이 있다.The object of the present invention is to change the structure of the conventional electronic obesity tube flowmeter by using a common point that the PB plume flowmeter and the electronic flowmeter can measure the flow rate when there is a water level sensor to achieve the installation and measurement performance improvement.

또한, 본 발명의 또 다른 목적은 측정 센서들의 고장으로 인하여 유량측정이 안될 경우를 대비하여, 측정의 이중화를 이루어 끊임없는 측정을 하고자 하는데 있다.In addition, another object of the present invention is to provide a continuous measurement by making the measurement redundant in case the flow rate measurement is not possible due to the failure of the measuring sensors.

본 발명은 상기 과제를 해결하기 위한 수단으로서 유체가 흘러오는 방향으로부터 유입부, 스로트부 및 유출부로 구성된 PB 플륨과, 상기 유입부의 하면에 설치된 1쌍의 수위센서; 상기 스로트부의 크레스트부에 설치된 유속센서; 및 상기 수위센서 및 상기 유속센서로부터 검출신호를 전달받아 유량을 측정하는 제어부;를 포함하여 이루어진 비만관 유량 측정 장치를 제공한다.The present invention provides a means for solving the above problems, PB plume consisting of an inlet, a throat and an outlet from the direction in which the fluid flows, and a pair of water level sensors provided on the lower surface of the inlet; A flow rate sensor installed in the crest portion of the throat portion; And a control unit for receiving a detection signal from the water level sensor and the flow rate sensor to measure a flow rate.

본 발명은 1 쌍의 수위센서로부터 수위신호를 입력받는 제1수위검출단계; 유속센서로부터 유속신호를 입력받는 유속검출단계; 상기 수위신호의 값을 미리 저장된 함수에 대입하여 유속센서 직상방의 수위를 확인하는 제2수위검출단계; 상기 제1수위검출단계에서 확인된 수위신호로부터 제1유량을 도출하고, 상기 유속신호와 상기 제2수위검출단계에서 확인된 수위를 이용하여 제2유량을 도출하는 유량도출단계; 및 상기 제1유량 또는 제2유량을 표시하는 유량표시단계;The present invention provides a water level detection step of receiving a water level signal from a pair of water level sensors; A flow rate detecting step of receiving a flow rate signal from the flow rate sensor; A second water level detection step of confirming the water level immediately above the flow rate sensor by substituting the value of the water level signal into a previously stored function; A flow rate deriving step of deriving a first flow rate from the water level signal identified in the first water level detection step, and deriving a second flow rate using the flow rate signal and the water level identified in the second water level detection step; And a flow rate display step of displaying the first flow rate or the second flow rate.

로 이루어지는 비만관 유량 측정 방법을 제공한다.It provides a method for measuring obesity flow rate consisting of.

본 발명은 유량표시단계는 상기 제1유량과 상기 제2유량을 비교하여 제1유량과 제2유량의 차이가 미리 정해진 허용범위 내의 값이면 제1유량, 제2유량 또는 상기 제1유량 및 제2유량의 평균유량을 표시하며, 제1유량과 제2유량의 차이가 미리 정해진 허용범위 내의 값이 아니면 제1유량, 제2유량 및 오류신호를 표시하는 것을 특징으로 하는 비만관 유량 측정 방법을 제공한다.According to the present invention, in the flow rate display step, the first flow rate, the second flow rate or the first flow rate and the first flow rate are compared with each other when the difference between the first flow rate and the second flow rate is within a predetermined allowable range. The average flow rate of the two flow rates are displayed, and if the difference between the first flow rate and the second flow rate is not within a predetermined allowable range, the first flow rate, the second flow rate, and an error signal are displayed. to provide.

본 발명에 의하면, 전자식 유량계의 설치 방법이 매우 편리해진다.According to this invention, the installation method of an electromagnetic flowmeter becomes very convenient.

본 발명에 의하면 수위센서 1개로 PB 플륨식 유량측정과 전자식 유량측정이 동시에 가능하다.According to the present invention, one water level sensor enables simultaneous PB plume flow rate measurement and electronic flow rate measurement.

수위센서를 1 쌍으로 설치하여 한 쪽이 고장나면 다른 수위센서가 이를 백업하여 지속적으로 측정이 가능하게 한다.If a pair of water level sensors is installed, if one side fails, the other level sensor backs it up to allow continuous measurement.

본 발명에 의하면 PB 플륨식 유량 측정방법과 전자식 유량 측정방법을 복합식으로 이용하므로 정확도가 높아지며, 전자식 유량측정에 이용되는 유속센서가 고장나더라도 PB 플륨식으로 지속적인 유량측정이 가능하다.According to the present invention, since the PB plume flow rate measuring method and the electronic flow rate measuring method are used in combination, the accuracy is increased, and even if the flow rate sensor used for the electronic flow rate measurement fails, the PB plume type continuous flow rate measurement is possible.

도 1은 본 발명의 PB 플륨의 개념도
도 2는 도 1의 x-x 단면도
도 3은 본 발명의 비만관 유량측정장치의 개념도1 is a conceptual diagram of the PB plume of the present invention
2 is a sectional view taken along line xx of FIG.
3 is a conceptual diagram of the obesity pipe flow rate measuring apparatus of the present invention

이하, 도면을 참조하여 본 발명의 유량계를 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, the flowmeter of this invention is demonstrated with reference to drawings.

도 1은 본 발명의 PB 플륨의 개념도이고, 도 2는 도 1의 x-x 단면도이다.1 is a conceptual diagram of a PB plume of the present invention, Figure 2 is an x-x cross-sectional view of FIG.

본발명의PB 플륨(10)은 유체 흐름의 전방에서부터 유입부(12), 스로트부(14) 그리고 유출부(16)로 구성된다.The PB plume 10 of the present invention consists of an inlet 12, a throat 14, and an outlet 16 from the front of the fluid flow.

스로트부(14)는 그 단면이 역사다리꼴 또는 사각형으로 형성되는데, 도 2에서는 역사다리꼴의 형상의 실시예를 나타내며, 스로트부(14)의 하부는 어느 정도의 높이를 가진 크레스트부(18)를 형성한다.The throat portion 14 has an inverted trapezoid or quadrangle in cross section. In FIG. 2, an embodiment of the inverted trapezoidal shape is illustrated, and the lower portion of the throat portion 14 has a height of a crest portion 18 having a certain height. ).

유입부(12)의 하부에 수위센서(20)가 1쌍 설치되며, 상기 크레스트부(18)에 유속센서(22)가 설치된다.One pair of water level sensors 20 are installed in the lower part of the inflow part 12, and a flow rate sensor 22 is installed in the crest part 18.

PB 플륨(10)의 빈 공간인 크레스트부(18)의 하단에 유속센서(22)가 설치되어, PB 플륨식 몸체를 활용가능하기 때문에 배관에 삽입하여 설치가 가능하다.The flow rate sensor 22 is installed at the lower end of the crest portion 18, which is an empty space of the PB plume 10, so that the PB plume type body can be utilized, so that it can be installed by being inserted into a pipe.

도 2에 스로트부(14)의 단면을 나타내며, 유체가 있다고 가정하면 A는 유체의 단면적, B는 유체의 상부면의 폭의 길이, C는 스로트부(14)의 하부의 길이, t는 크레스트부(18)의 높이이다.2 is a cross-sectional view of the throat portion 14, assuming that there is a fluid, A is the cross-sectional area of the fluid, B is the length of the width of the upper surface of the fluid, C is the length of the lower portion of the throat portion 14, t Is the height of the crest portion 18.

도 3은 본 발명의 비만관 유량측정장치의 개념도이다.3 is a conceptual diagram of the obesity tube flow rate measuring apparatus of the present invention.

유체(F)가 흐르는 관(40) 내에 본 발명의 PB 플륨(10), 1쌍의 수위센서(20) 및 유속센서(22)가 설치되고, 유체(F)는 원형관 내의 조임부인 PB 플륨(10)의 스로트부(14)를 통과하면서 한계류가 발생하여 유체(F)의 수위가 변화하게 된다.In the pipe 40 through which the fluid F flows, the PB plume 10 of the present invention, a pair of water level sensors 20 and a flow rate sensor 22 are installed, and the fluid F is a PB plume which is a tightening part in a circular pipe. While passing through the throat part 14 of (10), a limit flow occurs and the level of the fluid F changes.

제어부(30)는 수위센서(20)와 연결되는 수위측정부(24), 유속센서(22)와 연결되는 속도측정부(26), 그리고 유량연산부(28)로 이루어진다.The controller 30 includes a water level measuring unit 24 connected to the water level sensor 20, a speed measuring unit 26 connected to the flow rate sensor 22, and a flow rate calculating unit 28.

수위센서(20)의 직상수위는 h 로 정의하고, 유속센서(22)의 직상 수위는 h'로 정의한다.The direct water level of the water level sensor 20 is defined as h, and the direct water level of the flow rate sensor 22 is defined as h '.

수위 h는 수위센서(20)에서 측정되어 수위측정부(24)를 통해 유량연산부(28)로 입력되고, 속도 v는 유속센서(22)에서 측정되어 속도측정부(26)를 통해 유량연산부(28)로 입력되어, 유량연산부(28)에서 유량신호 Q를 출력하게 된다.The water level h is measured by the water level sensor 20 and inputted into the flow rate calculating unit 28 through the water level measuring unit 24, and the speed v is measured by the flow rate sensor 22 and the flow rate calculating unit (through the speed measuring unit 26). 28), the flow rate calculation unit 28 outputs the flow rate signal Q.

이하, 본 발명의 유량측정방법에 대하여 자세하게 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, the flow measuring method of this invention is demonstrated in detail.

전자식 비만관 유량계는 같은 위치에서 속도와 수위의 측정값이 동시에 필요하기 때문에 전자식 비만관 유량계에 필요한 수위(h')는 PB플륨식의 수위(h)의 함수 [h'=f(h)] 로 하여 유량을 측정한다.
Since the electronic obesity tube flowmeter requires the measurement of speed and water level at the same position, the level (h ') required for the electronic obesity tube flowmeter is a function of the water level (h) of the PB plume type [h' = f (h)]. Measure the flow rate using the

즉, 다음과 같은 측정순서를 거친다.That is, it goes through the following measurement procedure.

1) 수위측정부(24)에서 1 개의 수위센서(20)로부터 제1수위검출신호를 입력받아 수위센서(20)의 직상방의 수위(h)를 확인한다(제1수위검출단계).1) The water level measuring unit 24 receives the first level detection signal from one level sensor 20 and checks the level h directly above the level sensor 20 (first level detection step).

2) 속도측정부(26)에서 유속센서(22)로부터 유속검출신호를 입력받는다 (유속검출단계).2) The speed measuring unit 26 receives a flow rate detection signal from the flow rate sensor 22 (flow rate detection step).

3) 제1수위검출단계에서 입력된 제1수위검출신호의 값을 미리 저장된 함수에 대입하여 유속센서(22)의 직상방의 수위(h')를 확인한다(제2수위검출단계).3) Substituting the value of the first water level detection signal input in the first water level detection step into a previously stored function to check the water level h 'directly above the flow rate sensor 22 (second water level detection step).

예를 들면, 다음과 같은 함수이다.For example, the function

h'= h - A/2B - t + v2/2g ----- (1)h '= h-A / 2B-t + v 2 / 2g ----- (1)

여기서, h'는 유속센서 직상방의 수위, h 는 수위센서(20) 직상방의 수위, A 는 스로트부(14)의 유체의 단면적, B 는 스로트부(14)의 유체의 상부면의 폭의 길이, t 는 크레스트부(18)의 높이, v 는 평균속도이고, g는 중력가속도이다.Where h 'is the water level directly above the flow rate sensor, h is the water level directly above the water level sensor 20, A is the cross-sectional area of the fluid of the throat portion 14, B is the width of the upper surface of the fluid of the throat portion 14 Where t is the height of the crest section 18, v is the average velocity, and g is the gravitational acceleration.

4) 제1수위검출단계에서 확인된 제1수위검출신호로부터 제1유량을 도출한다(제1유량도출단계).4) A first flow rate is derived from the first water level detection signal identified in the first water level detection step (first flow rate derivation step).

예를 들면, 다음과 같은 함수이다.For example, the function

Q 1 = f(h) = C·h n - ------- (2)Q 1 = f (h) = Ch n -------- (2)

여기서, Q 1 은 제1유량, C 는 상수, h는 수위센서(20) 직상방의 유체의 수위, n 은 플륨의 형상에 따라 정해지는 상수이다. Here, Q 1 is the first flow rate, C is a constant, h is the water level of the fluid directly above the water level sensor 20, n is a constant determined according to the shape of the plume.

5) 유속검출신호와 제2수위검출단계의 수위를 이용하여 제2유량을 도출한다(제2유량도출단계).5) A second flow rate is derived using the flow rate detection signal and the water level in the second water level detection step (second flow rate derivation step).

예를 들면, 다음과 같은 함수이다.For example, the function

Q2 = v x A = v x f (h') --------- (3)Q 2 = vx A = vxf (h ') --------- (3)

여기서, Q2 는 제2유량, v 는 평균속도, 스로트부(14)의 유체의 단면적,Here, Q 2 is the second flow rate, v is the average speed, the cross-sectional area of the fluid of the throat 14,

h': 속도센서(22)의 직상방의 수위이다.h ': The water level immediately above the speed sensor 22.

6) 제1유량과 제2유량을 표시한다(유량표시단계).6) The first flow rate and the second flow rate are displayed (flow rate display step).

상술한 방법에 의하여 평균유속과 수위가 얻어지면 다음의 식에 의하여 유량을 계산할 수 있다.If the average flow rate and water level are obtained by the above-described method, the flow rate can be calculated by the following equation.

그리고, 부가적으로And additionally

6-1) 제1유량과 제2유량을 비교하여 그 차이가 미리 정해진 허용범위 내이면, 제1유량, 제2유량, 및 평균유량을 표시한다.6-1) When the first flow rate and the second flow rate are compared and the difference is within a predetermined allowable range, the first flow rate, the second flow rate, and the average flow rate are displayed.

6-2) 제1 유량과 제2유량을 비교하여 그 차이가 미리 정해진 허용범위 밖이면, 제1유량, 제2유량, 및 오류신호를 표시한다.6-2) When the first flow rate and the second flow rate are compared and the difference is outside the predetermined allowable range, the first flow rate, the second flow rate, and the error signal are displayed.

유속센서(22)가 작동할 때에는 제2유량도출단계의 식 (3)에 의하여 유량을 연산한다.When the flow rate sensor 22 operates, the flow rate is calculated by equation (3) of the second flow rate derivation step.

유속센서(22)가 고장일 경우, 즉, 유속센서(22)에서 속도측정부(26)로 측정값이 들어오지 않을 경우, 유량연산부(28)에서 식 (3)으로 유량을 연산하는 방식을 식 (2)로 전환하여 유량을 계산한다.When the flow rate sensor 22 is broken, that is, when the measured value does not enter the speed measuring unit 26 from the flow rate sensor 22, the flow rate calculation unit 28 calculates the flow rate by the formula (3). Switch to (2) and calculate the flow rate.

즉, 유속센서가 고장나서 두 유량값이 크게 달라진 것으로 판단되면 오류신호로 표시한다.In other words, if it is determined that the two flow rate values are significantly different due to a breakdown of the flow rate sensor, an error signal is displayed.

유속센서(22)에서 속도측정부(26)로 측정값이 들어올 경우, 다시 식 (3)으로 유량을 연산하는 방식으로 되돌아 온다.When the measured value enters the velocity measuring part 26 from the flow rate sensor 22, it returns to the method of calculating a flow volume by Formula (3) again.

설치된 1쌍의 수위센서(20)는 1개는 의무센서(Duty), 1개는 대비센서(Backup)로 의무센서가 고장일 경우, 수위측정부(24)에서 고장난 의무센서의 측정을 멈추고 대비하고 있는 다른 수위센서로 측정하게 한다.One pair of installed water level sensors 20 is a duty sensor (duty), and one is a contrast sensor (Backup), if the duty sensor is broken, the measurement of the broken duty sensor in the water level measurement unit 24 is stopped and contrasted Measure with another level sensor.

고장난 의무센서가 수리되어 원상 복구 시, 자동적으로 대비센서는 측정을 멈추고 의무센서가 수위를 측정하게 된다.When the faulty medical sensor is repaired and restored, the contrast sensor automatically stops measuring and the medical sensor measures the water level.

10 : PB 플륨 14 : 스로트부
18 : 크레스트부 20 : 수위센서
22 : 유속센서 30 : 제어부10: PB plum 14: throat part
18: crest part 20: water level sensor
22: flow rate sensor 30: control unit

Claims (3)

유체가 흘러오는 방향으로부터 유입부(12), 스로트부(14) 및 유출부(16)로 구성된 PB 플륨(10)과,
상기 유입부(12)의 하면에 설치된 1쌍의 수위센서(20);
상기 스로트부(14)의 크레스트부(18)에 설치된 유속센서(22); 및
상기 수위센서(20) 및 상기 유속센서(22)로부터 검출신호를 전달받아 유량을 측정하는 제어부(30);
를 포함하여 이루어진 복합식 비만관 유량 측정 장치.A PB plume 10 composed of an inlet 12, a throat 14, and an outlet 16 from a fluid flow direction;
A pair of water level sensors 20 installed on the bottom surface of the inlet 12;
A flow rate sensor 22 installed in the crest portion 18 of the throat portion 14; And
A control unit 30 receiving the detection signal from the water level sensor 20 and the flow rate sensor 22 and measuring a flow rate;
Compound obesity tube flow rate measurement device comprising a. 1 쌍의 수위센서(20)로부터 수위신호를 입력받는 제1수위검출단계;
유속센서(22)로부터 유속신호를 입력받는 유속검출단계;
상기 수위신호의 값을 미리 저장된 함수에 대입하여 유속센서(22)의 직상방의 수위를 확인하는 제2수위검출단계;
상기 제1수위검출단계에서 확인된 수위신호로부터 제1유량을 도출하고, 상기 유속신호와 상기 제2수위검출단계에서 확인된 수위를 이용하여 제2유량을 도출하는 유량도출단계; 및
상기 제1유량 또는 제2유량을 표시하는 유량표시단계;
로 이루어지는 복합식 비만관 유량 측정 방법.A first level detecting step of receiving a level signal from the pair of level sensors 20;
A flow rate detecting step of receiving a flow rate signal from the flow rate sensor 22;
A second water level detection step of confirming the water level above the flow rate sensor 22 by substituting the value of the water level signal into a previously stored function;
A flow rate deriving step of deriving a first flow rate from the water level signal identified in the first water level detection step, and deriving a second flow rate using the flow rate signal and the water level identified in the second water level detection step; And
A flow rate display step of displaying the first flow rate or the second flow rate;
Compound obesity tube flow rate measurement method consisting of. 제 2 항에 있어서,
상기 유량표시단계는 상기 제1유량과 상기 제2유량을 비교하여 제1유량과 제2유량의 차이가 미리 정해진 허용범위 내의 값이면 제1유량, 제2유량 또는 상기 제1유량 및 제2유량의 평균유량을 표시하며, 제1유량과 제2유량의 차이가 미리 정해진 허용범위 내의 값이 아니면 제1유량, 제2유량 및 오류신호를 표시하는 것을 특징으로 하는 비만관 유량 측정 방법.The method of claim 2,
In the flow rate display step, the first flow rate and the second flow rate are compared with each other, and the first flow rate, the second flow rate or the first flow rate and the second flow rate are different if the difference between the first flow rate and the second flow rate is within a predetermined allowable range. And displaying an average flow rate and displaying a first flow rate, a second flow rate, and an error signal if the difference between the first flow rate and the second flow rate is not within a predetermined allowable range.
KR1020100058957A 2010-06-22 2010-06-22 Method for measuring non-full flow using multiple sensors KR101208330B1 (en)

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* Cited by examiner, † Cited by third party
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KR101478976B1 (en) * 2014-04-15 2015-01-05 주식회사 마커스코리아 Smart flowmeter
KR102475270B1 (en) * 2022-04-19 2022-12-09 한국유체기술(주) Flow rate measuring device of non-full pipe

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KR101717895B1 (en) 2016-05-30 2017-03-23 주식회사 마커스코리아 The hybrid PB-Flume flow meter that can measurement full pipe and countercurrent flow

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JP4582623B2 (en) * 2004-07-08 2010-11-17 愛知時計電機株式会社 Flowmeter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101478976B1 (en) * 2014-04-15 2015-01-05 주식회사 마커스코리아 Smart flowmeter
KR102475270B1 (en) * 2022-04-19 2022-12-09 한국유체기술(주) Flow rate measuring device of non-full pipe

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