JPS6465420A - Level measuring instrument - Google Patents

Level measuring instrument

Info

Publication number
JPS6465420A
JPS6465420A JP22283687A JP22283687A JPS6465420A JP S6465420 A JPS6465420 A JP S6465420A JP 22283687 A JP22283687 A JP 22283687A JP 22283687 A JP22283687 A JP 22283687A JP S6465420 A JPS6465420 A JP S6465420A
Authority
JP
Japan
Prior art keywords
microwave
antenna
wave
liquid surface
directional
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
JP22283687A
Other languages
Japanese (ja)
Other versions
JPH0543973B2 (en
Inventor
Yutaka Kawada
Tomotaka Manabe
Akira Kobayashi
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP22283687A priority Critical patent/JPS6465420A/en
Publication of JPS6465420A publication Critical patent/JPS6465420A/en
Publication of JPH0543973B2 publication Critical patent/JPH0543973B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To accurately measure the level of an object surface of measurement even if a noise waveform varies momentarily by receiving only a microwave which is reflected irregularly by the object surface and mixing the received microwave with a sent wave. CONSTITUTION:The microwave 12 from a microwave oscillator 11 is frequency- modulated and outputted. Further, a directional coupler 13 outputs part of the microwave 12 to a transmitting antenna 14 and also sends the remainder to a detecting mixer 15. The antenna 14 outputs part of the microwave 12 which has an X- or Y- directional planes of polarization to the liquid surface 16 as the sent wave 12. Then a antenna 18 receives a wave with a Y- or X- directional plane of polarization among microwaves 12b-12d which are reflected by the liquid surface 16, a container wall 19, and a radome for antenna protection. Then the mixer 15 mixes the microwave 12b received by the antenna 18 with part of the sent wave 12a which is separated by the coupler 13 to output a beat signal 21. Then a beat signal processing circuit 23 counts its beat waves to calculate the distance to the liquid surface 16, i.e. level.
JP22283687A 1987-09-05 1987-09-05 Level measuring instrument Granted JPS6465420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22283687A JPS6465420A (en) 1987-09-05 1987-09-05 Level measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22283687A JPS6465420A (en) 1987-09-05 1987-09-05 Level measuring instrument

Publications (2)

Publication Number Publication Date
JPS6465420A true JPS6465420A (en) 1989-03-10
JPH0543973B2 JPH0543973B2 (en) 1993-07-05

Family

ID=16788671

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22283687A Granted JPS6465420A (en) 1987-09-05 1987-09-05 Level measuring instrument

Country Status (1)

Country Link
JP (1) JPS6465420A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070730A (en) * 1989-04-10 1991-12-10 Saab Marine Electronics Aktiebolag Device for level gauging with microwaves
US6759976B1 (en) 2002-12-20 2004-07-06 Saab Marine Electronics Ab Method and apparatus for radar-based level gauging
JP2006317162A (en) * 2005-05-10 2006-11-24 Matsushita Electric Ind Co Ltd Radar equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7381872B2 (en) * 2020-01-14 2023-11-16 日本製鉄株式会社 Level measuring device and level measuring method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070730A (en) * 1989-04-10 1991-12-10 Saab Marine Electronics Aktiebolag Device for level gauging with microwaves
US6759976B1 (en) 2002-12-20 2004-07-06 Saab Marine Electronics Ab Method and apparatus for radar-based level gauging
JP2006317162A (en) * 2005-05-10 2006-11-24 Matsushita Electric Ind Co Ltd Radar equipment

Also Published As

Publication number Publication date
JPH0543973B2 (en) 1993-07-05

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees