JPS5714771A - Sounding system of sonar - Google Patents

Sounding system of sonar

Info

Publication number
JPS5714771A
JPS5714771A JP8980180A JP8980180A JPS5714771A JP S5714771 A JPS5714771 A JP S5714771A JP 8980180 A JP8980180 A JP 8980180A JP 8980180 A JP8980180 A JP 8980180A JP S5714771 A JPS5714771 A JP S5714771A
Authority
JP
Japan
Prior art keywords
transmission
receiving
frequency
fed
marker
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
JP8980180A
Other languages
Japanese (ja)
Inventor
Yoichi Yamada
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8980180A priority Critical patent/JPS5714771A/en
Publication of JPS5714771A publication Critical patent/JPS5714771A/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
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/102—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics
    • G01S15/107—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics using frequency agility of carrier wave

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)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To increase receiving times of distant marker and to make possible to search repeatedly or continuously by receiving respective different transmission frequencies and by discriminating them. CONSTITUTION:A transmission/reception unit 1 transmits sound wave in water and receives echo sound from the marker. Receiving signal passed through a transmission/receiver converter 2 is phase composed by a receiver 5, amplified, and fed to BPF6-10. Then, receiving signals correspond to respective transmission frequencies f1-f5 are frequency discriminated. Consequently, output of BPF having center frequency which coincides with the transmission frequency is selected and fed to a detection circuit 12. Then, detection signal is displayed on CRT tube by a display circuit 13.
JP8980180A 1980-07-01 1980-07-01 Sounding system of sonar Pending JPS5714771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8980180A JPS5714771A (en) 1980-07-01 1980-07-01 Sounding system of sonar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8980180A JPS5714771A (en) 1980-07-01 1980-07-01 Sounding system of sonar

Publications (1)

Publication Number Publication Date
JPS5714771A true JPS5714771A (en) 1982-01-26

Family

ID=13980812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8980180A Pending JPS5714771A (en) 1980-07-01 1980-07-01 Sounding system of sonar

Country Status (1)

Country Link
JP (1) JPS5714771A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6394948A (en) * 1986-10-09 1988-04-26 Yakult Honsha Co Ltd Production of food fiber
US5269470A (en) * 1991-10-01 1993-12-14 Oji Paper Co., Ltd. Method of producing finely divided fibrous cellulose particles
US6270830B1 (en) 1996-10-21 2001-08-07 Asahi Kasei Kogyo Kabushiki Kaisha Stabilizer for meat products and meat product composition
US6495190B1 (en) 1998-01-09 2002-12-17 Asahi Kasei Kabushiki Kaisha Cellulose-containing composite

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539104A (en) * 1976-07-13 1978-01-27 Seiko Instr & Electronics Ltd Cassette tape running speed detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539104A (en) * 1976-07-13 1978-01-27 Seiko Instr & Electronics Ltd Cassette tape running speed detector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6394948A (en) * 1986-10-09 1988-04-26 Yakult Honsha Co Ltd Production of food fiber
US5269470A (en) * 1991-10-01 1993-12-14 Oji Paper Co., Ltd. Method of producing finely divided fibrous cellulose particles
US6270830B1 (en) 1996-10-21 2001-08-07 Asahi Kasei Kogyo Kabushiki Kaisha Stabilizer for meat products and meat product composition
US6495190B1 (en) 1998-01-09 2002-12-17 Asahi Kasei Kabushiki Kaisha Cellulose-containing composite

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