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JPS55129777A - Detector for frequency shift signal - Google Patents

Detector for frequency shift signal

Info

Publication number
JPS55129777A
JPS55129777A JP3575079A JP3575079A JPS55129777A JP S55129777 A JPS55129777 A JP S55129777A JP 3575079 A JP3575079 A JP 3575079A JP 3575079 A JP3575079 A JP 3575079A JP S55129777 A JPS55129777 A JP S55129777A
Authority
JP
Japan
Prior art keywords
output
gate
oscillator
generator
wave
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
JP3575079A
Other languages
Japanese (ja)
Other versions
JPS6022744B2 (en
Inventor
Yasuo Arai
Shinji Ariyoshi
Takehiko Nishimura
Taiichiro Moriguchi
Shigeru Aoyama
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.)
Furuno Electric Co Ltd
Original Assignee
Furuno 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 Furuno Electric Co Ltd filed Critical Furuno Electric Co Ltd
Priority to JP3575079A priority Critical patent/JPS6022744B2/en
Publication of JPS55129777A publication Critical patent/JPS55129777A/en
Publication of JPS6022744B2 publication Critical patent/JPS6022744B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/58—Velocity or trajectory determination systems; Sense-of-movement determination systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To enable speed measurement with high accuracy without flickered display value, by taking the part keeping a given frequency for the reflection waves only as the measuring object. CONSTITUTION:The unit consists of the high frequency oscillator 1, pulse oscillator 2, amplitude converter 8, and depth gate wave generator 11. The transceiver 5 radiates the ultrasonic wave pulse from the oscillator toward progressive direction and tilted direction in water, the reflection waves are received, converted into electric signal and fed to the amplifier 6. The output b of the amplifier 6 is wave-shaped 7 and converted into the analog waves d at the amplitude converter 8. D1 and D2 are frequency fluctuation received from the object moving differently from water flow and this rapid fluctuation only is selected at the differentiation circuit 9. This selection signal e is shaped f at the monostable multivibrator 10 and fed to the sample gate wave generator 12. The generator 11 produces the depth gate wave g based on the output of the oscillator 2 and it is fed to the generator 12 to deliver the gate output h. The gate 13 supplies the output c of the circuit 7 only when the output h is present, to the speed operator 14. This signal i does not include doppler content and obtains stable display value.
JP3575079A 1979-03-26 1979-03-26 Frequency shift signal detection device Expired JPS6022744B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3575079A JPS6022744B2 (en) 1979-03-26 1979-03-26 Frequency shift signal detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3575079A JPS6022744B2 (en) 1979-03-26 1979-03-26 Frequency shift signal detection device

Publications (2)

Publication Number Publication Date
JPS55129777A true JPS55129777A (en) 1980-10-07
JPS6022744B2 JPS6022744B2 (en) 1985-06-04

Family

ID=12450492

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3575079A Expired JPS6022744B2 (en) 1979-03-26 1979-03-26 Frequency shift signal detection device

Country Status (1)

Country Link
JP (1) JPS6022744B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017227566A (en) * 2016-06-23 2017-12-28 本多電子株式会社 Tidal current meter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102774297B1 (en) * 2021-08-26 2025-02-27 이용석 cats sand for defecation using kenaf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017227566A (en) * 2016-06-23 2017-12-28 本多電子株式会社 Tidal current meter

Also Published As

Publication number Publication date
JPS6022744B2 (en) 1985-06-04

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