JPS5551316A - Liquid level detecting system for solution - Google Patents

Liquid level detecting system for solution

Info

Publication number
JPS5551316A
JPS5551316A JP12408578A JP12408578A JPS5551316A JP S5551316 A JPS5551316 A JP S5551316A JP 12408578 A JP12408578 A JP 12408578A JP 12408578 A JP12408578 A JP 12408578A JP S5551316 A JPS5551316 A JP S5551316A
Authority
JP
Japan
Prior art keywords
liquid level
camera
detection
border
process part
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
JP12408578A
Other languages
Japanese (ja)
Other versions
JPS587166B2 (en
Inventor
Masahiro Miyamoto
Toshibumi Nibari
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.)
Nippon Crucible Co Ltd
Nippon Avionics Co Ltd
Nippon Rutsubo KK
Original Assignee
Nippon Crucible Co Ltd
Nippon Avionics Co Ltd
Nippon Rutsubo KK
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 Nippon Crucible Co Ltd, Nippon Avionics Co Ltd, Nippon Rutsubo KK filed Critical Nippon Crucible Co Ltd
Priority to JP12408578A priority Critical patent/JPS587166B2/en
Publication of JPS5551316A publication Critical patent/JPS5551316A/en
Publication of JPS587166B2 publication Critical patent/JPS587166B2/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
    • G01F23/22—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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

PURPOSE:To increase the detection accuracy for the liquid level by distributing the TV camera so that is may give the scanning vertical to the border line between the liquid level and the furnace wall, increasing the number of the scanning lines for the statistic process and then eliminating the noise caused by the slug. CONSTITUTION:TV camera 11 is distributed so that the horizontal scanning line may be vertical to border line 4 between the liquid level and the container wall on the photographing screen. For the video output signal of camera 11, the luminance changing position is detected for the horizontal scanning period of the prescribed region via analog video process part 21, process area detection part 23, digital process part 22 and light-darkness border detection part 24 each, and then the changing position is converted into the dimention valve of the actual liquid level through arithmetic circuit 28 by using the position where the detection frequency of these changing positions exceeded first the prescribed threshold level or the position featuring the maximum frequency among those which exceed the prescribed threshold level as the true liquid level through statistic process part 25. In such way, the detection accuracy can be increased for the liquid level.
JP12408578A 1978-10-11 1978-10-11 Solution level detection method Expired JPS587166B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12408578A JPS587166B2 (en) 1978-10-11 1978-10-11 Solution level detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12408578A JPS587166B2 (en) 1978-10-11 1978-10-11 Solution level detection method

Publications (2)

Publication Number Publication Date
JPS5551316A true JPS5551316A (en) 1980-04-15
JPS587166B2 JPS587166B2 (en) 1983-02-08

Family

ID=14876550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12408578A Expired JPS587166B2 (en) 1978-10-11 1978-10-11 Solution level detection method

Country Status (1)

Country Link
JP (1) JPS587166B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007970A1 (en) * 2008-02-07 2009-08-20 Siemens Aktiengesellschaft Method for dosing liquid in liquid tank, involves aligning camera to vertical calibration level, and picture recording of positioned and transparent liquid tank is activated in area of calibration level by aligned camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007970A1 (en) * 2008-02-07 2009-08-20 Siemens Aktiengesellschaft Method for dosing liquid in liquid tank, involves aligning camera to vertical calibration level, and picture recording of positioned and transparent liquid tank is activated in area of calibration level by aligned camera
DE102008007970B4 (en) * 2008-02-07 2010-09-02 Siemens Aktiengesellschaft Method and device for dosing a liquid in a liquid container

Also Published As

Publication number Publication date
JPS587166B2 (en) 1983-02-08

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