KR970059740A - 공기유속 센서소자 및 그 측정회로 - Google Patents

공기유속 센서소자 및 그 측정회로 Download PDF

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Publication number
KR970059740A
KR970059740A KR1019970016906A KR19970016906A KR970059740A KR 970059740 A KR970059740 A KR 970059740A KR 1019970016906 A KR1019970016906 A KR 1019970016906A KR 19970016906 A KR19970016906 A KR 19970016906A KR 970059740 A KR970059740 A KR 970059740A
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KR
South Korea
Prior art keywords
flow rate
thermistor
sensor element
resistor
air flow
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Application number
KR1019970016906A
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English (en)
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KR100244902B1 (ko
Inventor
은탁
김광진
Original Assignee
이진주
한국생산기술연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 이진주, 한국생산기술연구원 filed Critical 이진주
Priority to KR1019970016906A priority Critical patent/KR100244902B1/ko
Publication of KR970059740A publication Critical patent/KR970059740A/ko
Application granted granted Critical
Publication of KR100244902B1 publication Critical patent/KR100244902B1/ko

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    • 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
    • G01P5/08—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect
    • G01P5/083—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect by using electronic circuits for measuring the dynamoelectric effect
    • 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
    • G01F1/68—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 thermal effects
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
    • G01F1/6986—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters with pulsed heating, e.g. dynamic methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
    • G01N27/4073—Composition or fabrication of the solid electrolyte
    • G01N27/4074—Composition or fabrication of the solid electrolyte for detection of gases other than oxygen
    • 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
    • G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
    • G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
    • G01P5/165—Arrangements or constructions of Pitot tubes

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Molecular Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Volume Flow (AREA)

Abstract

본 발명은 공조장치에 사용되어 덕트내를 흐르는 공기의 유속이나 유량를 검출하는 벌크형 공기유속센서소자 및 그 측정회로에 관한 것으로써, 공기 유속센서 소자의 한 구성요소인 발열부인 저항체(20)이 특정온도구간에서 매우 큰 정온도계수값을 갖는 써미스터(20′)이다. 저항체(20)인 정온도계수 써미스터(20′)와, 정전압을 인가하는 전원(60)과, 이 써미스터에 직렬로 연결되어 전류값을 감지하는 기준저항(70)과, 상기 기준저항의 양단의 연결되어 써미스터의 저항과 소모된 전기적 에너지의 이를 계산하는 전류-유속계산기(80)으로 이루어진 측정회로이다. 따라서, 본 발명에 의하면, 공기 유속 센서소자의 저항체(발열부)로 이용되는 정온도계수 써미스터는 온도가 자기제한적이기 때문에 작은 유속에서도 열손상의 위험 없이 정전압 구동이 가능하므로 측정회로를 단순화시킬 수 있다. 또한, 작은 온도변화에도 큰 저항값의 변화가 생기므로 센서의 감도가 매우 커서 높은 측정 정밀도를 얻을 수 있다.게다가 비저항이 크므로 큰 체적의 벌크형타로 제작고 가능하고 내구성이 크고, 제작비용이 낮을 뿐만 아니라, 측정저항의 열용량이 커서 응답주파수가 낮은 대신 노이즈에 강해 공조장치등에 사용하기에 적합한 특성을 갖는다.

Description

공기유속 센서소자 및 그 측정회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제2도는 본 고안의 공기유속 센서소자의 개략적인 사시도.
제3도는 본 고안의 공기유속 센서소자의 측정회로도.

Claims (2)

  1. 발열부인 저항체(20)과, 지지대인 절연체(30)과, 전국(50)으로 구성된 공기 유속 측정센서(10)에 있어서, 상기 저항체(20)이 특정온도 구간에서 큰 정온도계수값을 갖는 써미스터(20′)인 것을 특징으로 하는 공기 유속 측정센서 소자.
  2. 공기유속 측정센서 소자의 측정회로에 있어서, 저항체(20)인 정온도계수써미스터(20′)와, 정전압을 인가하는 전원(60)과, 이 써미스터에 직렬로 연결되어 전류값을 감지하는 기준저항(70)과 상기 기준저항의 양단에 연결되어 써미스터의 저항과 소모된 전기적에너지의 크기를 계산하는 전류-유속계산기(80)으로 구성하여 유량 또는 유속을 측정하는 것을 특징으로 하는 공기유속 측정센서 소자의 측정회로.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019970016906A 1997-05-01 1997-05-01 공기유속 센서소자 및 그 측정회로 KR100244902B1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970016906A KR100244902B1 (ko) 1997-05-01 1997-05-01 공기유속 센서소자 및 그 측정회로

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970016906A KR100244902B1 (ko) 1997-05-01 1997-05-01 공기유속 센서소자 및 그 측정회로

Publications (2)

Publication Number Publication Date
KR970059740A true KR970059740A (ko) 1997-08-12
KR100244902B1 KR100244902B1 (ko) 2000-02-15

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KR1019970016906A KR100244902B1 (ko) 1997-05-01 1997-05-01 공기유속 센서소자 및 그 측정회로

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030018345A (ko) * 2001-08-28 2003-03-06 한국생산기술연구원 질량 유체 유량센서 및 질량 유체 흐름 검출장치

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