JPS57114823A - Optical liquid level sensor - Google Patents

Optical liquid level sensor

Info

Publication number
JPS57114823A
JPS57114823A JP69481A JP69481A JPS57114823A JP S57114823 A JPS57114823 A JP S57114823A JP 69481 A JP69481 A JP 69481A JP 69481 A JP69481 A JP 69481A JP S57114823 A JPS57114823 A JP S57114823A
Authority
JP
Japan
Prior art keywords
light
liquid level
liquid
sensor
waterdrops
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
JP69481A
Other languages
Japanese (ja)
Other versions
JPH0340329B2 (en
Inventor
Kiyoshi Yamashita
Tomiji Minekane
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP69481A priority Critical patent/JPS57114823A/en
Publication of JPS57114823A publication Critical patent/JPS57114823A/en
Publication of JPH0340329B2 publication Critical patent/JPH0340329B2/ja
Granted 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
    • G01F23/22—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
    • G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
    • G01F23/2922—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms

Abstract

PURPOSE:To avoid the malfunction and at the same time to increase the accuracy of the measurement data, by eliminating the sticking of the residual waterdrops. CONSTITUTION:A light 9 emitted from an optical sensor 3' travels in a glass rod 5 and its travelling direction is changed at a detecting part 2' and the light is turned into a reflected light 10. This light 10 is received at the sensor 3'. When the part 2' at the tip of an optical liquid level sensor touches on the liquid level of the liquid to be measured, the light 9 passes through the glass rod 5' to travel into the liquid. As a result, no reflected light is received at the sensor 3'. The liquid to be measured is sucked up via a metallic pipe 6 and a tube 7A by actuating a sucking pump 8 simultaneously with the detection of the liquid level. Thus the residual waterdrops are sucked into the pipe 6 by the sucking action. In such a way, the malfunction due to the sticking of the residual waterdrops can be avoided.
JP69481A 1981-01-08 1981-01-08 Optical liquid level sensor Granted JPS57114823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP69481A JPS57114823A (en) 1981-01-08 1981-01-08 Optical liquid level sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP69481A JPS57114823A (en) 1981-01-08 1981-01-08 Optical liquid level sensor

Publications (2)

Publication Number Publication Date
JPS57114823A true JPS57114823A (en) 1982-07-16
JPH0340329B2 JPH0340329B2 (en) 1991-06-18

Family

ID=11480862

Family Applications (1)

Application Number Title Priority Date Filing Date
JP69481A Granted JPS57114823A (en) 1981-01-08 1981-01-08 Optical liquid level sensor

Country Status (1)

Country Link
JP (1) JPS57114823A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148188A1 (en) * 1983-07-01 1985-07-17 BAXTER INTERNATIONAL INC. (a Delaware corporation) Wettable devices operational with aqueous liquids
EP0430111A2 (en) * 1989-11-27 1991-06-05 Fibronix Sensoren GmbH Optical sensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4738202U (en) * 1971-05-25 1972-12-27
JPS53132391U (en) * 1977-03-26 1978-10-20
JPS53163158U (en) * 1977-05-30 1978-12-20

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4738202U (en) * 1971-05-25 1972-12-27
JPS53132391U (en) * 1977-03-26 1978-10-20
JPS53163158U (en) * 1977-05-30 1978-12-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148188A1 (en) * 1983-07-01 1985-07-17 BAXTER INTERNATIONAL INC. (a Delaware corporation) Wettable devices operational with aqueous liquids
EP0430111A2 (en) * 1989-11-27 1991-06-05 Fibronix Sensoren GmbH Optical sensor

Also Published As

Publication number Publication date
JPH0340329B2 (en) 1991-06-18

Similar Documents

Publication Publication Date Title
EP0121848B1 (en) Apparatus for detecting bubbles in a liquid
NO885131L (en) FLUIDNIVAA DETECTOR.
FR2361644A1 (en) AUTOMATIC FLUID AND AIR SENSOR IN A DUCT
SE8502467D0 (en) FLODESMETARE
GB1508085A (en) Fluid sensing devices
US4956922A (en) Bubble inclination gauge including a central shield for light-emitting and light-detecting means
SE8802468L (en) VAETSKENIVAADETEKTOR
JPS57114823A (en) Optical liquid level sensor
SE9002847D0 (en) DISPOSITION OF PUR DETERMINER LE PROFIL DE LA SURFACE DE CHARGEMENT OF UN FOUR AND CUEVE
GB1216636A (en) Improvements in and relating to automatic particle counting apparatus
JPS5826226A (en) Detector for liquid level
JPS5635022A (en) Optical fiber liquid level indicator
JPS54100751A (en) Detection of connection of optical fibers
JPS57191561A (en) Measuring method for flow of fluid
ATE123874T1 (en) OPTICAL SENSOR.
JPS57203914A (en) Photo-electric displacement meter
JPS5693047A (en) Container detector
JPS5575620A (en) Prism for liquid level sensor
JPS55149874A (en) Level detector
JP3366688B2 (en) Test tube automatic outer diameter measurement method
JPS55146026A (en) Measuring unit for sedimentation velocity
JPS54133373A (en) Ink level detecting device in ink tank for ink jet
JPS56100316A (en) Liquid level indicator for molten glass
JPH0233170Y2 (en)
JPS5550105A (en) Moving distance meter for movable body