JPS56168119A - Liquid level detector - Google Patents

Liquid level detector

Info

Publication number
JPS56168119A
JPS56168119A JP7241280A JP7241280A JPS56168119A JP S56168119 A JPS56168119 A JP S56168119A JP 7241280 A JP7241280 A JP 7241280A JP 7241280 A JP7241280 A JP 7241280A JP S56168119 A JPS56168119 A JP S56168119A
Authority
JP
Japan
Prior art keywords
float
liquid
long cylinder
level
detected
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP7241280A
Other languages
Japanese (ja)
Other versions
JPS6044611B2 (en
Inventor
Yasukuni Yamane
Nobutoshi Gako
Chuji Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP7241280A priority Critical patent/JPS6044611B2/en
Publication of JPS56168119A publication Critical patent/JPS56168119A/en
Publication of JPS6044611B2 publication Critical patent/JPS6044611B2/en
Expired legal-status Critical Current

Links

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
    • G01F23/30—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 floats
    • G01F23/64—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 floats of the free float type without mechanical transmission elements
    • G01F23/68—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 floats of the free float type without mechanical transmission elements using electrically actuated indicating means
    • G01F23/686—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 floats of the free float type without mechanical transmission elements using electrically actuated indicating means using opto-electrically actuated indicating means

Abstract

PURPOSE:To detect the position of the liquid level to be detected continuously and to make size small and also to prolong life by providing a light emitting element and a photodetector in the upper part of a long cylinder, placing a float in the long cylinder, and detecting the quantity of the liquid reflected from the float. CONSTITUTION:A long cylinder 1 has outlets and inlets 2a, 2b for liquid and air in the bottom and upper parts. A float 3 placed therein moves vertically according to the displacement of the liquied level A to be detected. At this time, part of the light emitted from a light emitting diode 4 is reflected by the top surface of the float 3, advances backward and arrives at a phototransistor 5, but the quantity of the arrived light changes with the position of the float 3 on account of the attenuation by the spreading of the light beam and the reflection on the inside wall of the long cylinder 1. Hence, the position of the float 3, that is, the level of the liquid to be measured is detected from the output of the phototransistor 5.
JP7241280A 1980-05-28 1980-05-28 liquid level detector Expired JPS6044611B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7241280A JPS6044611B2 (en) 1980-05-28 1980-05-28 liquid level detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7241280A JPS6044611B2 (en) 1980-05-28 1980-05-28 liquid level detector

Publications (2)

Publication Number Publication Date
JPS56168119A true JPS56168119A (en) 1981-12-24
JPS6044611B2 JPS6044611B2 (en) 1985-10-04

Family

ID=13488537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7241280A Expired JPS6044611B2 (en) 1980-05-28 1980-05-28 liquid level detector

Country Status (1)

Country Link
JP (1) JPS6044611B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193329U (en) * 1985-05-27 1986-12-02
ES2135337A1 (en) * 1997-08-07 1999-10-16 Garcia Ramon Ferreiro Photovoltaic level probe
JP2007501092A (en) * 2003-05-23 2007-01-25 ウルトラデント プロダクツ インコーポレイテッド System and method for utilizing a flexible membrane dental tray
JP2014132223A (en) * 2013-01-04 2014-07-17 Hiroshi Makita Optical liquid level sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193329U (en) * 1985-05-27 1986-12-02
JPH0342338Y2 (en) * 1985-05-27 1991-09-05
ES2135337A1 (en) * 1997-08-07 1999-10-16 Garcia Ramon Ferreiro Photovoltaic level probe
JP2007501092A (en) * 2003-05-23 2007-01-25 ウルトラデント プロダクツ インコーポレイテッド System and method for utilizing a flexible membrane dental tray
JP2014132223A (en) * 2013-01-04 2014-07-17 Hiroshi Makita Optical liquid level sensor

Also Published As

Publication number Publication date
JPS6044611B2 (en) 1985-10-04

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