KR970022233A - Liquid level detector - Google Patents

Liquid level detector Download PDF

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Publication number
KR970022233A
KR970022233A KR1019960036698A KR19960036698A KR970022233A KR 970022233 A KR970022233 A KR 970022233A KR 1019960036698 A KR1019960036698 A KR 1019960036698A KR 19960036698 A KR19960036698 A KR 19960036698A KR 970022233 A KR970022233 A KR 970022233A
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KR
South Korea
Prior art keywords
phototransistor
light emitting
emitting diode
liquid level
level detector
Prior art date
Application number
KR1019960036698A
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Korean (ko)
Other versions
KR100434831B1 (en
Inventor
가츠미 모리토
타케시 오자와
타카시 아라키
타다시 야마구치
Original Assignee
다카노 야스아키
산요덴키 가부시키가이샤
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 다카노 야스아키, 산요덴키 가부시키가이샤 filed Critical 다카노 야스아키
Publication of KR970022233A publication Critical patent/KR970022233A/en
Application granted granted Critical
Publication of KR100434831B1 publication Critical patent/KR100434831B1/en

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Classifications

    • 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
    • G01F23/22—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G01J2001/4446—Type of detector
    • G01J2001/446—Photodiode

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Electronic Switches (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION

본 발명은 석유팬히터등 각종기기의 액면검출기에 있어서 특히 액면검출기의 개량에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the improvement of a liquid level detector, in particular, in liquid level detectors of various equipment such as petroleum fan heaters.

2. 발명이 해결하려고 하는 기술적 과제2. The technical problem to be solved by the invention

액면검출시에 있어서 이상발생의 원인을 명확히 할 수 있는 액면검출기를 제공한다.When detecting the liquid level, provide a liquid level detector to clarify the cause of the abnormality.

3. 발명의 해결방법의 요지3. Summary of Solution to Invention

발광다이오드(12)와 포토트랜지스터(14)사이의 광로(光路)중에 있어서의 액체의 존재 유,무에 따라서 상기 포토트랜지스터(14)의 컬히터전극으로부터 대응하는 검출신호를 출력시키는 액면검출기에 있어서, 포토트랜지스터(14)의 컬렉터전극과 발광다이오드(12)의 양극과의 사이에 신호레벨쉽트용 발광다이오드D1을 순방향으로 접속하여 발광다이오드(12)또는 포토트랜지스터(14)의 정상시와 고정시에 따라서 검출전압을 다르게하도록 하며, 또한 신호레벨쉽트용 발광다이오드D1의 발광 유,무에 따라서 고장 유,무 및 고장원인 등을 판단할 수 있게 한 것이다.In the liquid level detector for outputting a corresponding detection signal from the curl heater electrode of the phototransistor 14 depending on the presence or absence of liquid in the optical path between the light emitting diode 12 and the phototransistor 14 When the light emitting diode D1 or the phototransistor 14 is normally connected and fixed, by connecting the signal level light emitting diode D1 in the forward direction between the collector electrode of the phototransistor 14 and the anode of the light emitting diode 12. According to the present invention, the detection voltage may be changed differently, and the presence, absence, and cause of failure may be determined according to whether or not the light emitting diode D1 for signal level-supply is emitted.

4. 발명의 중요한 용도4. Important uses of the invention

극히 간단한 구성으로서 포토커플러(제1도의(10))의 고장, 또는 컨넥터의 접속불량 등을 검출한다.As an extremely simple configuration, a failure of the photocoupler (10 in FIG. 1) or a poor connection of a connector is detected.

Description

액면검출기(液面檢出器)Liquid level detector

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 액면검출기를 구비한 석유팬히터의 개략도,1 is a schematic diagram of a petroleum fan heater equipped with a liquid level detector of the present invention,

제2도는 본 발명에 있어서의 액면검출기의 구조예를 나타내는 세로단면도,2 is a longitudinal sectional view showing a structural example of a liquid level detector in the present invention;

제5도는 본 발명에 있어서의 액면검출기의 제1의 실시형태를 나타내는 전기회로도,5 is an electric circuit diagram showing a first embodiment of a liquid level detector in the present invention;

제6도는 본 발명에 있어서의 액면검출기의 제2의 실시형태를 나타내는 전기회로도,6 is an electric circuit diagram showing a second embodiment of the liquid level detector in the present invention;

제7도는 제1~제2실시형태에 있어서의 마이크로컴퓨터의 입력전압의 예를 나타내는 설명도.FIG. 7 is an explanatory diagram showing an example of an input voltage of a microcomputer in the first to second embodiments. FIG.

Claims (3)

발광다이오드(12)와 포토트랜지스터(14)사이의 광로(光路)중에 있어서의 액체의 존재 유,무에 따라서 상기의 포토트랜지스터(14)의 컬렉터전극으로부터 대응하는 검출신호를 출력하는 액면검출기에 있어서, 상기 포토트랜지스터(14)의 컬렉터전극과 발광다이오드(12)의 양극과의 사이에 발광다이오드(D1)이 순방향으로 접속되어 있는 것을 특징으로 하는 액면검출기.In the liquid level detector for outputting a corresponding detection signal from the collector electrode of the phototransistor 14 according to the presence or absence of liquid in the optical path between the light emitting diode 12 and the phototransistor 14 And a light emitting diode (D1) is connected in a forward direction between the collector electrode of the phototransistor and the anode of the light emitting diode (12). 발광다이오드(12)와 포토트랜지스터(14)사이의 광로중의 검출액체의 존재 유,무에 따라서 상기 포토트랜지스터(14)의 컬렉터전극으로부터 대응하는 검출신호를 출력하는 액면검출기이며, 상기 발광다이오드(12)및 포토트랜지스터(14)가 컨넥터(30)을 통해서 외부회로(마이크로컴퓨터)(26)에 접속된 액면검출기에 있어서, 상기 포토트랜지스터(14)의 컬렉터전극이 접속되는 컨넥터접속단과 상기 발광다이오드(12)의 양극이 순방향으로 접속되는 컨넥터접속단과의 사이에 발광다이오드D1이 접속되어 있는 것을 특징으로 하는 액면검출기.A liquid level detector for outputting a corresponding detection signal from a collector electrode of the phototransistor 14 depending on the presence or absence of a detection liquid in the optical path between the light emitting diode 12 and the phototransistor 14, 12) and a liquid level detector in which a phototransistor 14 is connected to an external circuit (microcomputer) 26 through a connector 30, the connector connecting end to which the collector electrode of the phototransistor 14 is connected and the light emitting diode The liquid crystal detector according to claim 12, wherein the light emitting diode D1 is connected between the connector connection terminal to which the anode of the cathode is connected in the forward direction. 발광다이오드(12)와 포토트랜지스터(14)사이의 광로중의 검출액체의 존재 유,무에 따라서 상기 포토트랜지스터(14)의 컬렉터전극으로부터 대응하는 검출신호를 출력하는 액면검출기이며, 상기 발광다이오드(12)및 포토트랜지스터(14)가 컨넥터(30)을 통해서 마이크로컴퓨터나 비교기 등의 검출기(26)에 접속되어 있는 것을 특징으로 하는 액면검출기.A liquid level detector for outputting a corresponding detection signal from a collector electrode of the phototransistor 14 depending on the presence or absence of a detection liquid in the optical path between the light emitting diode 12 and the phototransistor 14, 12) and a phototransistor (14) are connected to a detector (26) such as a microcomputer or a comparator via a connector (30). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960036698A 1995-10-02 1996-08-30 Liquid level detector KR100434831B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP25524395A JP3579144B2 (en) 1995-10-02 1995-10-02 Liquid level detector
JP95-255243 1995-10-02

Publications (2)

Publication Number Publication Date
KR970022233A true KR970022233A (en) 1997-05-28
KR100434831B1 KR100434831B1 (en) 2004-07-27

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JP (1) JP3579144B2 (en)
KR (1) KR100434831B1 (en)
CN (1) CN1077284C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101873750B (en) * 2010-06-25 2013-11-13 深圳市欣锐特科技有限公司 LED (light emitting diode) lamp fault processing method, LED driver and LED lamp
CN109540258A (en) * 2018-11-01 2019-03-29 上海航天精密机械研究所 Five-point type loading liquid level measuring device based on infrared photoelectric sensor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523444A (en) * 1978-08-09 1980-02-19 Hitachi Ltd Liquid-level alarm unit
JPH0741305U (en) * 1993-12-20 1995-07-21 株式会社コロナ Liquid level detector
JPH0843172A (en) * 1994-07-29 1996-02-16 Sanyo Electric Co Ltd Optical liquid level sensor
JPH08136322A (en) * 1994-11-10 1996-05-31 Sanyo Electric Co Ltd Liquid level detection method and liquid level detector

Also Published As

Publication number Publication date
KR100434831B1 (en) 2004-07-27
JPH09101190A (en) 1997-04-15
JP3579144B2 (en) 2004-10-20
CN1160195A (en) 1997-09-24
CN1077284C (en) 2002-01-02

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