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KR970066555A - Digital Hygrometer and Humidifier Circuit - Google Patents

Digital Hygrometer and Humidifier Circuit Download PDF

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Publication number
KR970066555A
KR970066555A KR1019970034215A KR19970034215A KR970066555A KR 970066555 A KR970066555 A KR 970066555A KR 1019970034215 A KR1019970034215 A KR 1019970034215A KR 19970034215 A KR19970034215 A KR 19970034215A KR 970066555 A KR970066555 A KR 970066555A
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South Korea
Prior art keywords
humidity
digital
circuit
interface circuit
voltage
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KR1019970034215A
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Korean (ko)
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KR100226873B1 (en
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정원섭
박지만
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이재춘
하나계기공업 주식회사
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Publication of KR970066555A publication Critical patent/KR970066555A/en
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    • 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/228—Circuits therefor
    • 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
    • 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
    • G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
    • G01N27/605—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing for determining moisture content, e.g. humidity

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

본 발명은 주위온도와 오염정도에 영향을 받지 않고 정확한 습도표시가 가능한 디지털 습도계를 제공하고자 하는 것으로 특히 센서에서 측정된 센서값을 디지털 값으로 변환시키는 인터페이스 회로를 간단화시켜 IC화시키기가 쉽고 신뢰성이 높은 디지털 습도계에 관한 것이다The present invention is to provide a digital hygrometer capable of displaying accurate humidity without being influenced by the ambient temperature and the degree of contamination, and in particular, the interface circuit for converting the sensor value measured by the sensor into a digital value is simple and easy to IC. This is about a high digital hygrometer

또한 이 디지털 습도계를 이용한 습도 제어기에 관한 것이다.It also relates to a humidity controller using this digital hygrometer.

이러한 본 발명은 절대습도와 상대습도에 따라 정전용량이 변화되는 정전용량 습도센서인 커패시터로 센서부를 구성하고 상기 커패시터의 정전용량변화에 따른 전압을 슈미트 트리거 회로로 검출하여 디지털 값으로 변화시키는 한편 커패시터의 충방전을 스위칭시키는 스위치로 인터페이스 회로부를 구성하며 상기 인터페이스 회로부의 디지탈값을 외부로 표시시키는 7-세그먼트로 디지털 표시하고 가장 간단한 평태의 제어방식인 ON/OFF 제어를 구성하므로써 이루어진다.The present invention constitutes a sensor unit with a capacitor which is a capacitance humidity sensor whose capacitance changes according to absolute humidity and relative humidity, and detects the voltage according to the capacitance change of the capacitor with a Schmitt trigger circuit to change the digital value to the capacitor. It consists of a switch for switching the charging and discharging of the interface circuit part, the digital display of the 7-segment that displays the digital value of the interface circuit part to the outside, and by configuring the ON / OFF control, which is the simplest control mode.

Description

디지털 습도계 및 습도조절기 회로Digital Hygrometer and Humidifier Circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도 (a)(b)는 본 발명의 블록도, 제2도는 본 발명의 정전용량 습도센서 커패시터의 정전용량대 상대습도 특성도, 제3(a)도는 본 발명의 전체 인터페이스 회로도, 제3(b)도는 본 발명의 다른 실시예의 전체 인터페이스 회로도, 제4도는 본 발명의 센서 회로도.Figure 1 (a) (b) is a block diagram of the present invention, Figure 2 is a capacitance vs. relative humidity characteristics of the capacitance humidity sensor capacitor of the present invention, Figure 3 (a) is an overall interface circuit diagram of the present invention, 3 (b) is an overall interface circuit diagram of another embodiment of the present invention, and FIG. 4 is a sensor circuit diagram of the present invention.

Claims (5)

두개의 캐스코드 전류미러와 상대습도에 따라 정전용량이 선형적으로 변하는 정전용량 습도센서 커패시터를 사용하고 습도값을 전압으로 검출하는 센서부와, 센서부의 검출전압을 디지탈 값으로 변환시키는 인터페이스 회로부와, 인터페이스 회로부의 디지탈 값을 숫자로 표시시키는 표시 및 제어부로 구성된 디지털 습도 및 습도 조절기 회로.Two cascode current mirrors and a capacitive humidity sensor capacitor whose capacitance varies linearly with relative humidity, and a sensor unit for detecting humidity as a voltage, and an interface circuit unit for converting the detected voltage into a digital value. And a digital humidity and humidity controller circuit comprising a display and a controller for numerically displaying a digital value of an interface circuit. 청구항 1에서, 인터페이스 회로부는 두개의 정전용량 습도센서 커패시터에 충전된 전압을 문턱전압 레벨로 검출하는 슈미트 트리거 회로와, 슈미트 트리거 회로의 출력을 입력으로 하는 D 플립플롭(또는 R-S플립플롭)과, D 플립플롭(또는 R-S플립플롭)의 출력을 논리조합하는 익스크류시브 오아게이트 및 노아게이트와, 노아게이크의 출력에 의하여 구동되고 정전용량 습도센서 커패시터의 충반전을 제어하는 스위치와, 가습기와 제습기를 제어하는 스위치로 구성된 디지털 습도 조절기 회로.The circuit of claim 1, wherein the interface circuit unit comprises: a Schmitt trigger circuit for detecting a voltage charged in two capacitive humidity sensor capacitors as a threshold voltage level, a D flip-flop (or RS flip-flop) as an input of an output of the Schmitt trigger circuit, Exclusive ora gates and logic gates that logically combine the output of the D flip-flop (or RS flip-flop), a switch driven by the output of the no-gake and controlling the charging and charging of the capacitive humidity sensor capacitor, Digital humidity controller circuit consisting of a switch to control the dehumidifier. 청구항 1에서, 정전용량 습도센서 커패시터는 각기 용량이 다르고 적은 정전용량의 습도센서 커패시터는 습도영향을 받지 못하게 비닐코팅하여 사용하는 것을 특징으로 하는 디지털 습도계 회로.The digital hygrometer circuit of claim 1, wherein the capacitance humidity sensor capacitors have different capacities, and the humidity sensor capacitors having low capacitances are coated with vinyl so as not to be affected by humidity. 청구항 1에서, 표시부는 인터페이스 회로부의 익스크루시브 오아게이트 출력을 카운트하여 7-세그먼트로 습도값을 표시시키거나 카운트된 디지탈 신호와 설정된 디지털 값을 비교하여 ON/OFF 제어시키는 디지털 습도 조절기 회로.The digital humidity controller circuit of claim 1, wherein the display unit counts the exclusive oragate output of the interface circuit unit to display the humidity value in 7-segment or to control ON / OFF by comparing the counted digital signal with a set digital value. 청구항 2에서, 슈미트트리거 회로는 정전용량 습도센서 커패시터의 충전전압을 입력으로 하는 전압-전류 변환기인 2개의 OTA와, 상기 OTA에 연결된 2개의 저항과, 상기 저항을 통하여 공급되는 직류전원으로 구성되어진 것을 특징으로 하는 디지털 습도계 회로.The Schmitt trigger circuit is composed of two OTAs, which are voltage-to-current converters for inputting the charging voltage of the capacitive humidity sensor capacitor, two resistors connected to the OTAs, and a DC power supply supplied through the resistors. Digital hygrometer circuit, characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019970034215A 1997-07-22 1997-07-22 Digital Hygrometer and Humidifier Circuit Expired - Fee Related KR100226873B1 (en)

Priority Applications (1)

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KR1019970034215A KR100226873B1 (en) 1997-07-22 1997-07-22 Digital Hygrometer and Humidifier Circuit

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Application Number Priority Date Filing Date Title
KR1019970034215A KR100226873B1 (en) 1997-07-22 1997-07-22 Digital Hygrometer and Humidifier Circuit

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KR970066555A true KR970066555A (en) 1997-10-13
KR100226873B1 KR100226873B1 (en) 1999-10-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040051889A (en) * 2002-12-13 2004-06-19 현대자동차주식회사 Temperature and humidity sensing device for air conditioning system of vehicles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007038180A2 (en) * 2005-09-22 2007-04-05 Nano-Proprietary, Inc. Hydrogen sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040051889A (en) * 2002-12-13 2004-06-19 현대자동차주식회사 Temperature and humidity sensing device for air conditioning system of vehicles

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