JPS56168571A - Improving apparatus directional characteristic of oscillator - Google Patents

Improving apparatus directional characteristic of oscillator

Info

Publication number
JPS56168571A
JPS56168571A JP7147880A JP7147880A JPS56168571A JP S56168571 A JPS56168571 A JP S56168571A JP 7147880 A JP7147880 A JP 7147880A JP 7147880 A JP7147880 A JP 7147880A JP S56168571 A JPS56168571 A JP S56168571A
Authority
JP
Japan
Prior art keywords
oscillators
inputted
output
pulses
circuit
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.)
Pending
Application number
JP7147880A
Other languages
Japanese (ja)
Inventor
Shigeo Yamamoto
Kazuto 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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7147880A priority Critical patent/JPS56168571A/en
Priority to US06/216,922 priority patent/US4425635A/en
Publication of JPS56168571A publication Critical patent/JPS56168571A/en
Pending 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
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/96—Sonar systems specially adapted for specific applications for locating fish
    • 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
    • G01S3/802—Systems for determining direction or deviation from predetermined direction
    • G01S3/808—Systems for determining direction or deviation from predetermined direction using transducers spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
    • G01S3/8083—Systems for determining direction or deviation from predetermined direction using transducers spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems determining direction of source

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To eliminate the reception wave having a submaximum value and improve the directional characteristics of oscillators, by passing the signals received by means of oscillators when the phases of the sound waves inputted to two or more oscillators agree with each other. CONSTITUTION:The sound wave signals inputted from oscillators 1a and 1b are amplified in amplifiers 2a and 2b and inputted to phase detecting circuits 4a and 4b. Pulse generating circuits 5a and 5b receive the trigger pulses from the phase detecting circuits 4a and 4b output pulses having a given width. Said pulses inputted to a coparing circuit 6, which delivers an output when the phases of these pulses agree with each other. According to said output, a pulse genrating circuit 7 outputs an output pulse, by which the switch of a switching circuit 8 is closed, so that the outputs of the amplifiers 2a and 2b are passed through the switching circuit 8 and outputted.
JP7147880A 1980-05-30 1980-05-30 Improving apparatus directional characteristic of oscillator Pending JPS56168571A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP7147880A JPS56168571A (en) 1980-05-30 1980-05-30 Improving apparatus directional characteristic of oscillator
US06/216,922 US4425635A (en) 1980-05-30 1980-12-16 Fish sonar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7147880A JPS56168571A (en) 1980-05-30 1980-05-30 Improving apparatus directional characteristic of oscillator

Publications (1)

Publication Number Publication Date
JPS56168571A true JPS56168571A (en) 1981-12-24

Family

ID=13461773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7147880A Pending JPS56168571A (en) 1980-05-30 1980-05-30 Improving apparatus directional characteristic of oscillator

Country Status (1)

Country Link
JP (1) JPS56168571A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008232795A (en) * 2007-03-20 2008-10-02 Furuno Electric Co Ltd Ultrasonic detector and ultrasonic detection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008232795A (en) * 2007-03-20 2008-10-02 Furuno Electric Co Ltd Ultrasonic detector and ultrasonic detection method

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