KR970075850A - 초음파 다회선 유량계 - Google Patents

초음파 다회선 유량계 Download PDF

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Publication number
KR970075850A
KR970075850A KR1019960017987A KR19960017987A KR970075850A KR 970075850 A KR970075850 A KR 970075850A KR 1019960017987 A KR1019960017987 A KR 1019960017987A KR 19960017987 A KR19960017987 A KR 19960017987A KR 970075850 A KR970075850 A KR 970075850A
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South Korea
Prior art keywords
flow rate
ultrasonic
flow
measuring
channel
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KR1019960017987A
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English (en)
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KR0170815B1 (ko
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장학수
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남상용
주식회사 창민물산
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Application filed by 남상용, 주식회사 창민물산 filed Critical 남상용
Priority to KR1019960017987A priority Critical patent/KR0170815B1/ko
Priority to JP9137077A priority patent/JP2935833B2/ja
Priority to RU97108694A priority patent/RU2138782C1/ru
Priority to US08/863,471 priority patent/US6089104A/en
Priority to DE19722140A priority patent/DE19722140C2/de
Publication of KR970075850A publication Critical patent/KR970075850A/ko
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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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/662—Constructional details
    • 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
    • G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
    • G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
    • 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
    • G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
    • G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
    • G01P5/248—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves by measuring phase differences

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

Abstract

주로 대구경 관로에서의 기체, 액체 유량을 측정하는 초음파 다회선 유량계에 있어 관로의 직관부분의 길이가 짧아 유속분포 상태가 복잡하게 변하는 조건에서 여러 현선상에서의 유속을 측정하는 회선수를 증가시킴에 있어 초음파전환기의 크기에 따르는 제한을 축소하며 순간유량 측정시간을 동시에 모든 회선을 가동시켜 축소시키기 위하여 관로 한지점에 한 개의 초음파 발사전환기가 설치되어 있고 이로부터 좌우로 동일한 간격에서 관로 원주선을 따라 수신만하는 초음파전환기들이 배치되어 있어 관로 단면을 방사형으로 수많은 현으로 분할하여 현선상의 유속을 측정하여 근사 적분방법으로 유량을 연산하도록 되어 있는 초음파 다회선 유량측정장치.

Description

초음파 다회선 유량계
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제2도는 본 발명에 따르는 초음파 유속측정 다회선 구성도, 제3도는 본 발명에 따르는 초음파 지향성 조절장치, 제4도는 본 발명에 따르는 시간차방법으로 유속, 유량을 측정하는 전자회로의 골격도, 제5도는 본 발명에 따르는 위상차방법으로 유속, 유량을 측정하는 전자회로 골격도, 제6도는 본 발명에 따르는 방사 방향으로 배치된 현들을 반경선상으로 제 배치하여 유량을 연산하는 설명도이다.

Claims (3)

  1. 관로(파이프 관) 단면을 여러 현으로 분할하고 현에 대하여 직각으로 되는 현선상의 평균유속을 측정하는 초음파 발사, 수신 전환기 쌍이 관로에 배치된 유속측정 회선이 다수로 되어 있고 초음파 전환기 쌍(雙) 사이에서의 초음파 펄스 전번시간을 측정하는 시간간격 측정장치, 여러 현에서의 유속을 연산하고 이에 근거하여 유량을 연산하며 유속측정 회선들의 동작을 제어하는 제어 연산장치 등을 포함한 초음파 다회선 유량측정 장치에 있어서 유속측정 회선 수를 증가시킴에 있어 초음파 전환기의 크기의 제한을 현저히 축소시키고 순간유량 측정시간을 감소시키며 유량계 전자회로를 간소화 할 목적을 달성하기 위하여 관로벽 한 지점에 넓은 지향성으로 초음파만 발사하는 초음파 발사전환기가 장착되어 있고 이 지점에서 관로길이를 따라 좌우로 일정한 동일간격에서 원주선을 따라 여러 개의 초음파를 수신만하는 초음파 수신전환기들이 대칭으로 장착되어 있어 발사 전환기 위치를 원점으로 해서 관로 단면을 방사형의 여러 현으로 분할하여 각 현선상에 직각으로 되는 유속을 측정하는 여러 개의 유속측정 회선이 구성되어 있으며 현선상의 평균유속을 측정하기 위한 수신전환기 쌍은 각각 증폭기에 연결되어 있고 유속을 시간차(또는 주파수차) 방법으로 측정하는 경우에는 증폭기 출력이 펄스 성형장치와 연결되어 그의 출력은 시간차 측정장치 입력에 연결되어 있고 위상차 방법으로 유속을 측정할 경우에는 수신전환기 쌍들의 증폭기 출력들이 디지탈 위상분별기에 연결되어 있고 시간차 측정장치 또는 위상분별기 출력들은 유속 및 유량 연산 및 제어장치 입력에 연결되어 있으며 초음파 발사전환기점 반대측에 또 하나의 (유체 내에서의 초음속을 측정하는) 수신전환기가 장착되어 있고 그의 출력은 유속, 유량연산 제어장치와 연결되어 있으며 초음파 발사전환기는 유속, 유량연산 및 제어장치에서 발생하는 제어신호에 의하여 동작하는 초음파 발진기와 연결되어 있는 것이 특징으로 된 초음파 다회선 유량측정 장치.
  2. 청구항 1에 있어서, 여러 현에서의 유속을 위상차 방법으로 측정하는 경우 초음파 전환기들이 설치된 관로 길이 내벽에서 초음파 연속파들이 반사하여 수신전환기들이 수신할 수 있는 것을 방지할 목적으로 초음파 발사전환기 발사면에 고리띠형의 초음파 흡수체가 정착되어 있는 것을 특징으로 된 초음파 발사전환기를 내포한 초음파 다회선 유량측정 장치.
  3. 청구항 1에 있어서, 유량연산의 편의성과 정확도를 보장하기 위하여 방사형으로 배치된 현들을 해당한 관로의 변경 r 위치로 대치하고 유속분포함수 v=f(r)를 구하여 vi=f(ri)에 해당하는 부분면적을 곱하여 부분유량을 연산하면서 적산하여 총 유량을 연산하는 유속, 유량연산 제어장치를 내포한 초음파 다회선 유량측정창치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960017987A 1996-05-27 1996-05-27 초음파 다회선 유량계 KR0170815B1 (ko)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019960017987A KR0170815B1 (ko) 1996-05-27 1996-05-27 초음파 다회선 유량계
JP9137077A JP2935833B2 (ja) 1996-05-27 1997-05-27 多回線流量測定装置
RU97108694A RU2138782C1 (ru) 1996-05-27 1997-05-27 Ультразвуковое многоканальное устройство измерения расхода
US08/863,471 US6089104A (en) 1996-05-27 1997-05-27 Ultrasonic flow meter using transit time across tube chords for determining the flow rates
DE19722140A DE19722140C2 (de) 1996-05-27 1997-05-27 Ultraschall-Mehrkanal-Durchflußraten-Meßvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960017987A KR0170815B1 (ko) 1996-05-27 1996-05-27 초음파 다회선 유량계

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Publication Number Publication Date
KR970075850A true KR970075850A (ko) 1997-12-10
KR0170815B1 KR0170815B1 (ko) 1999-05-01

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US (1) US6089104A (ko)
JP (1) JP2935833B2 (ko)
KR (1) KR0170815B1 (ko)
DE (1) DE19722140C2 (ko)
RU (1) RU2138782C1 (ko)

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KR0170815B1 (ko) 1999-05-01
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