JPS5582926A - Measuring method and device for liquid level by microwave - Google Patents

Measuring method and device for liquid level by microwave

Info

Publication number
JPS5582926A
JPS5582926A JP15803978A JP15803978A JPS5582926A JP S5582926 A JPS5582926 A JP S5582926A JP 15803978 A JP15803978 A JP 15803978A JP 15803978 A JP15803978 A JP 15803978A JP S5582926 A JPS5582926 A JP S5582926A
Authority
JP
Japan
Prior art keywords
beat signal
wave form
circuit
waves
unnecessary
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
JP15803978A
Other languages
Japanese (ja)
Other versions
JPH0252203B2 (en
Inventor
Minoru Uozumi
Soichi Ishikawa
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP15803978A priority Critical patent/JPS5582926A/en
Publication of JPS5582926A publication Critical patent/JPS5582926A/en
Publication of JPH0252203B2 publication Critical patent/JPH0252203B2/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 surely remove the adverse effect of unnecessary reflected waves reflected except from the surface of a liquid, by previously recording the wave form of a beat signal due to the unnecessary waves. CONSTITUTION:The wave form of a beat signal due to unnecessary reflected waves Rd is previously recorded in a wave form recording circuit 10. In measurement, the beat signal is repeatedly regenerated synchronously with the microwave modulation period of a modulated signal generator and then supplied to a subtraction circuit 11. Both normal reflected waves R and the unnecessary reflected waves Rd are received by an antenna 3. Reception signals of both the waves are applied to a mixing circuit 7 to produce a beat signal. The former beat signal regenerated from the wave form recording circuit 10 is subtracted from the latter beat signal supplied from the mixing circuit 7, by the subtraction circuit 11 synchronously with the microwave modulation period.
JP15803978A 1978-12-18 1978-12-18 Measuring method and device for liquid level by microwave Granted JPS5582926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15803978A JPS5582926A (en) 1978-12-18 1978-12-18 Measuring method and device for liquid level by microwave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15803978A JPS5582926A (en) 1978-12-18 1978-12-18 Measuring method and device for liquid level by microwave

Publications (2)

Publication Number Publication Date
JPS5582926A true JPS5582926A (en) 1980-06-23
JPH0252203B2 JPH0252203B2 (en) 1990-11-09

Family

ID=15662936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15803978A Granted JPS5582926A (en) 1978-12-18 1978-12-18 Measuring method and device for liquid level by microwave

Country Status (1)

Country Link
JP (1) JPS5582926A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6250511A (en) * 1985-08-27 1987-03-05 Ohbayashigumi Ltd Sand level meter
JP2016029212A (en) * 2014-07-23 2016-03-03 Ｊｆｅスチール株式会社 Refining method of molten iron
JP2018197697A (en) * 2017-05-24 2018-12-13 新日本無線株式会社 Radio wave sensor
JP2020148509A (en) * 2019-03-11 2020-09-17 新日本無線株式会社 Target detection device, system, program and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6250511A (en) * 1985-08-27 1987-03-05 Ohbayashigumi Ltd Sand level meter
JPH0548330B2 (en) * 1985-08-27 1993-07-21 Obayashi Constr Co Ltd
JP2016029212A (en) * 2014-07-23 2016-03-03 Ｊｆｅスチール株式会社 Refining method of molten iron
JP2018197697A (en) * 2017-05-24 2018-12-13 新日本無線株式会社 Radio wave sensor
JP2020148509A (en) * 2019-03-11 2020-09-17 新日本無線株式会社 Target detection device, system, program and method

Also Published As

Publication number Publication date
JPH0252203B2 (en) 1990-11-09

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