KR100455309B1 - Solenoid valve flow measuring device and method for obtaining an accurate flow value by selecting automatically a flow tube and a flow meter according to the size of flow and the compensation of differential pressure - Google Patents

Solenoid valve flow measuring device and method for obtaining an accurate flow value by selecting automatically a flow tube and a flow meter according to the size of flow and the compensation of differential pressure Download PDF

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KR100455309B1
KR100455309B1 KR1019970075636A KR19970075636A KR100455309B1 KR 100455309 B1 KR100455309 B1 KR 100455309B1 KR 1019970075636 A KR1019970075636 A KR 1019970075636A KR 19970075636 A KR19970075636 A KR 19970075636A KR 100455309 B1 KR100455309 B1 KR 100455309B1
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flow
negative pressure
differential pressure
processing unit
central processing
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KR1019970075636A
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Korean (ko)
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KR19990055681A (en
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기 호 성
창 식 임
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주식회사 현대오토넷
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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
    • G01F1/34—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
    • 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
    • G01F23/80—Arrangements for signal processing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/003—Machine valves

Abstract

PURPOSE: A solenoid valve flow measuring device and a method are provided to control vacuum pressure with high precision by using an electronic regulator and to use freely the device regardless of the kind of a duty drive solenoid valve and environmental conditions. CONSTITUTION: A solenoid valve flow measuring device is composed of a central processing unit(10) for outputting a control signal; a vacuum pump(20) forming negative pressure necessary for measurement by receiving the control signal of the central processing unit; a vacuum tank(30) for preventing sudden change of the negative pressure and controlling an excessive motion of the vacuum pump; an electronic regulator(40) for adjusting the degree of the negative pressure output from the vacuum tank by receiving the control signal output from the central processing unit; a differential pressure sensor unit(50) for receiving the negative pressure output from the regulator and detecting and outputting the degree of the negative pressure to the central processing unit; plural flow tubes(60) for moving precisely the flow of a constant range; a solenoid valve(70) for receiving the control signal output from the central processing unit and opening and closing the flow tube to move the precisely the flow; and a flow meter(80) for measuring precisely the flow of the constant range output from the flow tube and outputting a measuring value to the central processing unit.

Description

솔레노이드 밸브 유량 측정 장치 및 방법Solenoid Valve Flow Measurement Apparatus and Method

본 발명은 자동차내부의 솔레노이드 밸브 유량 시험 장치에 관한 것으로, 특히, 자동차에 적용되는 듀티 사이클의 차이로 유량의 변화를 제어할 수 있고, 솔레노이드 밸브를 시험할 수 있도록 하는 솔레노이드 밸브 유량 측정 장치 및 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve flow rate testing apparatus inside an automobile, and in particular, a solenoid valve flow rate measuring apparatus and method for controlling a change in flow rate due to a difference in a duty cycle applied to an automobile, and allowing a solenoid valve to be tested. It is about.

종래에는 듀티 구동 솔레노이드 밸브의 유량을 검사하는 장치는 하나의 상품에 전용으로 제작된 검사 장치가 사용되고 있으므로써, 각각의 밸브에 대한 호환성이 이루어지지 않고, 차압이 보상되지 않아 유량의 측정치가 정확하지 않은 문제점이 있었다.Conventionally, the device for inspecting the flow rate of the duty-driven solenoid valve has been used exclusively for the inspection of a single product. Therefore, the compatibility of each valve is not achieved and the differential pressure is not compensated. There was no problem.

본 발명은 상기와 같은 종래의 문제점을 해소하기 위한 것으로, 특히, 전자식 레귤레이터를 이용하여 차압의 보상과 유량의 크기에 따라 층류관 및 유량계를 자동적으로 선택되도록 하여 정확한 유량값을 얻을 수 있도록 한 솔레노이드 밸브 유량 측정 장치 및 방법을 제공하는 데 있다.The present invention is to solve the above-mentioned conventional problems, in particular, the solenoid so as to obtain the correct flow rate by automatically selecting the laminar flow pipe and flow meter according to the differential pressure compensation and the flow rate using an electronic regulator A valve flow measuring apparatus and method are provided.

상기와 같은 목적을 달성하기 위하여 본 발명 솔레노이드 밸브 유량 측정 장치는, 제어신호를 출력시켜주는 중앙처리장치와; 상기 중앙처리장치의 제어신호를 입력받아 측정에 필요한 부압을 형성하는 진공 펌프와; 순간적으로 부압의 큰 변화를 막아주고, 상기 진공 펌프의 무리한 동작을 제어해 주는 진공 탱크와; 상기 중앙처리장치에서 출력된 제어신호를 입력받아 상기 진공 탱크에서 출력된 부압의 크기를 제어하는 전자식 레귤레이터와; 상기 전자식 레귤레이터를 통해 출력된 부압을 입력받아 부압의 크기를 감지하여 상기 중앙처리장치로 출력시켜 주는 차압 센서부와; 다수개로 이루어져 일정 범위의 유량을 정밀하게 흐를 수 있도록 해주는 층류관과; 상기 중앙처리장치에서 출력된 제어신호를 입력받아 유량을 정밀하게 흐르도록 상기 층류관을 개/폐시켜주는 솔레노이드 밸브와; 상기 층류관에서 출력된 일정 범위의 유량을 정밀하게 측정하여 측정값을 상기 중앙처리장치로 출력시켜 주는 유량계를 포함하여 구성된 것을 특징으로 한다.In order to achieve the above object, the solenoid valve flow rate measuring device of the present invention includes a central processing unit for outputting a control signal; A vacuum pump configured to receive a control signal of the central processing unit and form a negative pressure necessary for measurement; A vacuum tank which prevents a large change in the negative pressure at an instant and controls excessive operation of the vacuum pump; An electronic regulator which receives the control signal output from the central processing unit and controls the magnitude of the negative pressure output from the vacuum tank; A differential pressure sensor unit configured to receive a negative pressure output through the electronic regulator, detect a magnitude of the negative pressure, and output the negative pressure to the central processing unit; Laminar flow pipe made of a plurality to allow a precise flow of a certain range flow; A solenoid valve which opens / closes the laminar flow tube to receive a control signal output from the central processing unit and flows precisely; It is characterized in that it comprises a flow meter for precisely measuring the flow rate of a certain range output from the laminar flow pipe to output the measured value to the central processing unit.

한편, 본 발명 솔레노이드 밸브 유량 측정 방법은 솔레노이드 밸브를 동작시키기 위한 신호 및 차압을 설정하는 설정단계(S10)와; 상기 설정단계(S10)에서 신호 및 차압을 설정하였으면, 진공 펌프를 구동하여 진공 탱크에 부압을 형성하는 부압 형성 단계(S20)와; 상기 부압 형성 단계(S20)에서 진공 탱크에 부압이 형성되었으면, 진공 탱크에 형성된 부압과 미리 설정된 차압을 비교하는 비교단계(S30)와; 상기 비교단계(S30)에서 진공 탱크에 형성된 부압과 미리 설정된 차압을 비교하여 목표 차압이 형성되었는지 판단하는 목표 차압 판단단계(S40)와; 상기 목표 차압 판단단계(S40)에서 목표 차압이 형성되지 않았으면, 전자식 레귤레이터를 구동하여 차압을 형성하는 전자식 레귤레이터 구동 단계(S50)와; 상기 목표 차압 판단단계(S40)에서 목표 차압이 형성되었으면, 층류관을 선택하는 층류관 선택단계(S60)와; 상기 층류관 선택단계(S60)에서 층류관을 선택하였으면, 유량을 읽어내는 유량 독출단계(S70)와; 상기 유량 독출 단계(S70)에서 유량이 층류관의 용량보다 많이 유입되는지를 판단하는 판단단계(S80)와; 상기 판단단계(S80)에서 유량이 층류관의 용량보다 많이 유입되면 상기 층류관 선택단계(S60)로 되돌아가서 층류관의 용량을 큰 것으로 교체하는 층류관 교체단계(S90)와; 상기 판단단계(S80)에서 유량이 층류관의 용량보다 많이 유입되지 않았으면, 독출된 데이터를 출력시켜주는 데이터 출력단계(S100)를 포함하여 구성된 것을 특징으로 한다.On the other hand, the solenoid valve flow rate measuring method of the present invention includes a setting step (S10) for setting a signal and a differential pressure for operating the solenoid valve; A negative pressure forming step (S20) of forming a negative pressure in a vacuum tank by driving a vacuum pump when the signal and the differential pressure are set in the setting step (S10); When the negative pressure is formed in the vacuum tank in the negative pressure forming step (S20), a comparison step (S30) for comparing the negative pressure formed in the vacuum tank and a predetermined differential pressure; A target differential pressure determination step (S40) of comparing the negative pressure formed in the vacuum tank with a preset differential pressure in the comparison step (S30) to determine whether a target differential pressure has been formed; An electronic regulator driving step (S50) of forming a differential pressure by driving an electronic regulator when a target differential pressure is not formed in the target differential pressure determining step (S40); A laminar flow pipe selection step (S60) of selecting a laminar flow pipe if a target differential pressure is formed in the target differential pressure determination step (S40); If the laminar flow tube is selected in the laminar flow tube selection step (S60), the flow rate reading step (S70) for reading the flow rate; A determination step (S80) of determining whether the flow rate is larger than the capacity of the laminar flow pipe in the flow rate reading step (S70); A laminar flow tube replacing step (S90) of returning to the laminar flow tube selecting step (S60) and replacing the capacity of the laminar flow tube with a larger one when the flow rate is larger than the capacity of the laminar flow tube in the determination step (S80); If the flow rate in the determination step (S80) did not flow more than the capacity of the laminar flow pipe, characterized in that it comprises a data output step (S100) for outputting the read data.

도 1 은 본 발명의 일 실시예에 따른 솔레노이드 밸브 유량 측정 장치를 나 타낸 블록도,1 is a block diagram showing a solenoid valve flow rate measuring apparatus according to an embodiment of the present invention,

도 2 는 본 발명의 일 실시예에 따른 솔레노이드 밸브 유량 측정 방법을 나 타낸 순서도이다.2 is a flow chart showing a solenoid valve flow rate measuring method according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 중앙처리장치 20 : 진공 펌프10: central processing unit 20: vacuum pump

30 : 진공 탱크 40 : 전자식 레귤레이터30: vacuum tank 40: electronic regulator

50 : 차압 센서부 60 : 층류관50: differential pressure sensor 60: laminar flow tube

70 : 솔레노이드 밸브 80 : 유량계70 solenoid valve 80 flow meter

이하, 상술한 내용을 본 발명에 따른 실시예를 통해 상세히 설명하면 다음과 같다.Hereinafter, the above-described contents will be described in detail through an embodiment according to the present invention.

본 발명은 도 1 에 도시한 바와 같이, 먼저, 중앙처리장치(10)는 제어신호를 출력시켜주고, 진공 펌프(20)에서는 상기 중앙처리장치(10)에서 출력된 제어신호를 입력받아 측정에 필요한 부압을 형성하면, 진공 탱크(30)에서는 순간적인 부압의 변화를 막아주고, 상기 진공 펌프(20)의 무리한 동작을 제어하고, 전자식 레귤레이터(40)에서는 상기 중앙처리장치(10)에서 출력된 제어신호를 입력받아 상기 진공 탱크(30)에서 출력된 부압의 크기를 제어해 준다.As shown in FIG. 1, first, the central processing unit 10 outputs a control signal, and the vacuum pump 20 receives a control signal output from the central processing unit 10 to measure the measurement. When the required negative pressure is formed, the vacuum tank 30 prevents the instantaneous change of negative pressure, controls excessive operation of the vacuum pump 20, and the electronic regulator 40 outputs from the central processing unit 10. The control signal is input to control the magnitude of the negative pressure output from the vacuum tank 30.

또한, 차압 센서부(50)에서는 상기 전자식 레귤레이터(40)를 통해 출력된 부압을 입력받아 부압의 크기를 감지하여 상기 중앙처리장치(10)로 출력시켜 주고, 층류관(60)은 다수개로 이루어져 일정 범위의 유량을 정밀하게 흐를 수 있도록 하고, 솔레노이드 밸브(70)에서는 상기 중앙처리장치(10)에서 출력된 제어신호를 입력받아 유량을 정밀하게 흐르도록 상기 층류관(60)을 개/폐시켜주고, 유량계(80)에서는 상기 층류관(60)에서 출력된 일정 범위의 유량을 정밀하게 측정하여 측정된 값을 상기 중앙처리장치(10)로 출력시켜줌으로써, 본 실시예를 구성한다.In addition, the differential pressure sensor unit 50 receives the negative pressure output through the electronic regulator 40, detects the magnitude of the negative pressure, and outputs the negative pressure to the central processing unit 10, and the laminar flow pipe 60 is formed in plural. In order to precisely flow a certain range of flow rates, the solenoid valve 70 receives the control signal output from the central processing unit 10 to open / close the laminar flow tube 60 to precisely flow the flow rate. In the flow meter 80, the present embodiment is configured by precisely measuring a flow rate in a predetermined range output from the laminar flow tube 60 and outputting the measured value to the central processing unit 10.

이하, 상기와 같이 구성된 솔레노이드 밸브 유량 측정 장치의 동작과정을 설명하면 다음과 같다.Hereinafter, the operation process of the solenoid valve flow rate measuring device configured as described above is as follows.

사용자가 설정한 솔레노이드 밸브(70)를 동작하기 위한 전원 공급과 주파수, 전압 및 듀티 사이클에 대하여 필요한 제어신호를 중앙처리장치(10)에서 출력시켜주면, 상기 중앙처리장치(10)에서 출력된 제어신호를 진공 펌프(20)에서 입력받아 1200/mm의 용량을 가지면서 측정에 필요한 부압을 형성한다.When the central processing unit 10 outputs a control signal necessary for power supply and frequency, voltage, and duty cycle for operating the solenoid valve 70 set by the user, the control output from the central processing unit 10 is performed. The signal is input from the vacuum pump 20 and has a capacity of 1200 / mm to form a negative pressure necessary for measurement.

그리고, 상기 진공 펌프(20)가 무리한 동작을 하지 않도록 진공 탱크(30)에서 상기 진공 펌프(20)의 공기를 빼내어 부압을 출력시켜주면, 상기 중앙처리장치(10)에서 출력된 제어신호를 전자식 레귤레이터(40)에서 입력받아 상기 진공 탱크(30)에서 출력된 부압의 크기를 제어해주고, 상기 전자식 레귤레이터(40)를 통해 출력된 부압을 차압 센서부(50)에서 입력받아 상기 중앙처리장치(10)로 출력시켜 준다.Then, when the vacuum pump 20 removes the air of the vacuum pump 20 from the vacuum tank 30 so as not to operate excessively and outputs a negative pressure, the control signal output from the central processing unit 10 is electronically controlled. Controls the magnitude of the negative pressure received from the regulator 40 and output from the vacuum tank 30, and receives the negative pressure output through the electronic regulator 40 from the differential pressure sensor unit 50 to the central processing unit 10 )

또한, 상기 중앙처리장치(10)에서 출력된 제어신호를 솔레노이드 밸브(70)에서 입력받아 유량을 정밀하게 흐르도록 층류관(60)을 개/폐시켜 주면, 상기 솔레노이드 밸브(70)의 개/폐 신호에 의해 다수개로 이루어진 층류관(60)에서 일정 범위의 유량을 정밀하게 흐를 수 있도록 해주고, 상기 층류관(60)에서 출력된 일정 범위의 유량을 유량계(80)에서 입력받아 정밀하게 측정하여 측정값을 상기 중앙처리장치(10)로 출력시켜 준다.In addition, when the laminar flow tube 60 is opened / closed to receive the control signal output from the central processing unit 10 from the solenoid valve 70 and flows precisely, the solenoid valve 70 is opened / closed. By the closed signal to enable a precise flow of a certain range of flow in the laminar flow tube 60 consisting of a plurality of, and by receiving a flow rate of the predetermined range output from the laminar flow tube 60 from the flow meter 80 to accurately measure The measured value is output to the CPU 10.

한편, 본 발명 솔레노이드 밸브 유량 측정 방법은 솔레노이드 밸브(70)를 동작시키기 위한 신호 및 차압을 중앙처리장치(10)에서 설정하여(S10), 상기 설정단계(S10)에서 솔레노이드 밸브(70)를 동작시키기 위한 신호 및 차압을 설정하였으면, 진공 펌프(20)를 구동하여 진공 탱크(30)에 부압을 형성하고(S20), 상기 부압 형성 단계(S20)에서 진공 탱크(30)에 부압이 형성되었으면, 진공 탱크(30)에 형성된 부압과 미리 설정된 차압을 비교한다(S30).On the other hand, the solenoid valve flow rate measuring method of the present invention by setting the signal and the differential pressure for operating the solenoid valve 70 in the central processing unit 10 (S10), the solenoid valve 70 is operated in the setting step (S10) When the signal and the differential pressure are set, the negative pressure is formed in the vacuum tank 30 by driving the vacuum pump 20 (S20), and when the negative pressure is formed in the vacuum tank 30 in the negative pressure forming step (S20), The negative pressure formed in the vacuum tank 30 is compared with a preset differential pressure (S30).

또한, 상기 비교단계(S30)에서 진공 탱크(30)에 형성된 부압과 미리 설정된 차압을 비교하여 목표 차압이 형성되었는지 판단하여(S40), 상기 목표 차압 판단단계(S40)에서 목표 차압이 형성되지 않았으면, 전자식 레귤레이터(40)를 구동하여 차압을 형성하고(S50), 상기 목표 차압 판단단계(S40)에서 목표 차압이 형성되었으면, 층류관(60)을 선택하고(S60), 상기 층류관 선택단계(S60)에서 층류관(60)을 선택하였으면, 유량계(80)에서 유량을 정밀하게 읽어낸다(S70).In addition, it is determined whether a target differential pressure is formed by comparing the negative pressure formed in the vacuum tank 30 with a preset differential pressure in the comparison step S30 (S40), and the target differential pressure is not formed in the target differential pressure determination step S40. If the differential pressure is formed by driving the electronic regulator 40 (S50), and the target differential pressure is formed in the target differential pressure determination step (S40), the laminar flow tube 60 is selected (S60) and the laminar flow tube selection step If the laminar flow tube 60 is selected in S60, the flow rate is read accurately by the flowmeter 80 (S70).

또한, 상기 유량 독출 단계(S70)에서 유량이 층류관(60)의 용량보다 많이 유입되는지를 판단하여(S80), 상기 판단단계(S80)에서 유량이 층류관(60)의 용량보다 많이 유입되면, 상기 층류관 선택단계(S60)로 되돌아가서 층류관(60)의 용량을 큰 것으로 교체하고(S90), 상기 판단단계(S80)에서 유량이 층류관(60)의 용량보다 많이 유입되지 않았으면, 독출된 데이터를 출력시켜준다(S100).In addition, the flow rate reading step (S70) determines whether the flow rate is more than the capacity of the laminar flow tube 60 (S80), if the flow rate is more than the capacity of the laminar flow tube 60 in the determination step (S80) Return to the laminar flow tube selection step (S60) and replace the capacity of the laminar flow tube 60 with a larger one (S90), if the flow rate in the determination step (S80) did not flow more than the capacity of the laminar flow tube (60) , And outputs the read data (S100).

이상에서 살펴본 바와 같이 본 발명 솔레노이드 밸브 유량 측정 장치 및 방법은, 차압의 보상과 유량의 크기에 따라 층류관 및 유량계를 자동으로 선택할 수 있어 정확한 유량값을 손쉽게 구할 수 있고, 전자식 레귤레이터를 사용함으로써, 고정밀의 진공압을 제어하고, 듀티 구동 솔레노이드 밸브의 종류 및 사용 환경에 관계없이 사용이 가능한 효과가 있다.As described above, the solenoid valve flow rate measuring apparatus and method of the present invention can automatically select a laminar flow tube and a flow meter according to the differential pressure compensation and the magnitude of the flow rate, thereby easily obtaining an accurate flow rate value, and by using an electronic regulator, It is possible to control the high-precision vacuum pressure and to use it regardless of the type and duty environment of the duty-driven solenoid valve.

Claims (2)

제어신호를 출력시켜주는 중앙처리장치와; 상기 중앙처리장치의 제어신호를 입력받아 측정에 필요한 부압을 형성하는 진공 펌프와; 순간적으로 부압의 큰 변화를 막아주고, 상기 진공 펌프의 무리한 동작을 제어해 주는 진공 탱크와; 상기 중앙처리장치에서 출력된 제어신호를 입력받아 상기 진공 탱크에서 출력된 부압의 크기를 제어하는 전자식 레귤레이터와; 상기 전자식 레귤레이터를 통해 출력된 부압을 입력받아 부압의 크기를 감지하여 상기 중앙처리장치로 출력시켜 주는 차압 센서부와; 다수개로 이루어져 일정 범위의 유량을 정밀하게 흐를 수 있도록 해주는 층류관과; 상기 중앙처리장치에서 출력된 제어신호를 입력받아 유량을 정밀하게 흐르도록 상기 층류관을 개/폐시켜주는 솔레노이드 밸브와; 상기 층류관에서 출력된 일정 범위의 유량을 정밀하게 측정하여 측정값을 상기 중앙처리장치로 출력시켜 주는 유량계를 포함하여 구성된 것을 특징으로 하는 솔레노이드 밸브 유량 측정 장치.A central processing unit for outputting a control signal; A vacuum pump configured to receive a control signal of the central processing unit and form a negative pressure necessary for measurement; A vacuum tank which prevents a large change in the negative pressure at an instant and controls excessive operation of the vacuum pump; An electronic regulator which receives the control signal output from the central processing unit and controls the magnitude of the negative pressure output from the vacuum tank; A differential pressure sensor unit configured to receive a negative pressure output through the electronic regulator, detect a magnitude of the negative pressure, and output the negative pressure to the central processing unit; Laminar flow pipe made of a plurality to allow a precise flow of a certain range flow; A solenoid valve which opens / closes the laminar flow tube to receive a control signal output from the central processing unit and flows precisely; Solenoid valve flow rate measuring device, characterized in that it comprises a flow rate meter for precisely measuring the flow rate of the output range from the laminar flow pipe to output the measured value to the central processing unit. 솔레노이드 밸브를 동작시키기 위한 신호 및 차압을 설정하는 설정단계(S10)와; 상기 설정단계(S10)에서 신호 및 차압을 설정하였으면, 진공 펌프를 구동하여 진공 탱크에 부압을 형성하는 부압 형성 단계(S20)와; 상기 부압 형성 단계(S20)에서 진공 탱크에 부압이 형성되었으면, 진공 탱크에 형성된 부압과 미리 설정된 차압을 비교하는 비교단계(S30)와; 상기 비교단계(S30)에서 진공 탱크에 형성된 부압과 미리 설정된 차압을 비교하여 목표 차압이 형성되었는지 판단하는 목표 차압 판단단계(S40)와; 상기 목표 차압 판단단계(S40)에서 목표 차압이 형성되지 않았으면, 전자식 레귤레이터를 구동하여 차압을 형성하는 전자식 레귤레이터 구동 단계(S50)와; 상기 목표 차압 판단단계(S40)에서 목표 차압이 형성되었으면, 층류관을 선택하는 층류관 선택단계(S60)와; 상기 층류관 선택단계(S60)에서 층류관을 선택하였으면, 유량을 읽어내는 유량 독출단계(S70)와; 상기 유량 독출 단계(S70)에서 유량이 층류관의 용량보다 많이 유입되는지를 판단하는 판단단계(S80)와; 상기 판단단계(S80)에서 유량이 층류관의 용량보다 많이 유입되면 상기 층류관 선택단계(S60)로 되돌아가서 층류관의 용량을 큰 것으로 교체하는 층류관 교체단계(S90)와; 상기 판단단계(S80)에서 유량이 층류관의 용량보다 많이 유입되지 않았으면, 독출된 데이터를 출력시켜주는 데이터 출력단계(S100)를 포함하여 구성된 것을 특징으로 하는 솔레노이드 밸브 유량 측정 방법.A setting step (S10) of setting a signal and a differential pressure for operating the solenoid valve; A negative pressure forming step (S20) of forming a negative pressure in a vacuum tank by driving a vacuum pump when the signal and the differential pressure are set in the setting step (S10); When the negative pressure is formed in the vacuum tank in the negative pressure forming step (S20), a comparison step (S30) for comparing the negative pressure formed in the vacuum tank and a predetermined differential pressure; A target differential pressure determination step (S40) of comparing the negative pressure formed in the vacuum tank with a preset differential pressure in the comparison step (S30) to determine whether a target differential pressure has been formed; An electronic regulator driving step (S50) of forming a differential pressure by driving an electronic regulator when a target differential pressure is not formed in the target differential pressure determining step (S40); A laminar flow pipe selection step (S60) of selecting a laminar flow pipe if a target differential pressure is formed in the target differential pressure determination step (S40); If the laminar flow tube is selected in the laminar flow tube selection step (S60), the flow rate reading step (S70) for reading the flow rate; A determination step (S80) of determining whether the flow rate is larger than the capacity of the laminar flow pipe in the flow rate reading step (S70); A laminar flow tube replacing step (S90) of returning to the laminar flow tube selecting step (S60) and replacing the capacity of the laminar flow tube with a larger one when the flow rate is larger than the capacity of the laminar flow tube in the determination step (S80); If the flow rate in the determination step (S80) did not flow more than the capacity of the laminar flow pipe, the solenoid valve flow rate measuring method comprising a data output step (S100) for outputting the read data.
KR1019970075636A 1997-12-27 1997-12-27 Solenoid valve flow measuring device and method for obtaining an accurate flow value by selecting automatically a flow tube and a flow meter according to the size of flow and the compensation of differential pressure KR100455309B1 (en)

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