JPS52127261A - Mark discrimination system - Google Patents

Mark discrimination system

Info

Publication number
JPS52127261A
JPS52127261A JP4246576A JP4246576A JPS52127261A JP S52127261 A JPS52127261 A JP S52127261A JP 4246576 A JP4246576 A JP 4246576A JP 4246576 A JP4246576 A JP 4246576A JP S52127261 A JPS52127261 A JP S52127261A
Authority
JP
Japan
Prior art keywords
discrimination system
mark discrimination
mark
sonar
discrimination
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
JP4246576A
Other languages
Japanese (ja)
Inventor
Tsuneji Koshikawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4246576A priority Critical patent/JPS52127261A/en
Publication of JPS52127261A publication Critical patent/JPS52127261A/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)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To permit the discrimination of a target in a sonar, etc. by use of a cable transmitter of the linear arrangement type which can transmit successively ultrasonic wave beams whose frequencies are varied with directions.
JP4246576A 1976-04-16 1976-04-16 Mark discrimination system Pending JPS52127261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4246576A JPS52127261A (en) 1976-04-16 1976-04-16 Mark discrimination system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4246576A JPS52127261A (en) 1976-04-16 1976-04-16 Mark discrimination system

Publications (1)

Publication Number Publication Date
JPS52127261A true JPS52127261A (en) 1977-10-25

Family

ID=12636812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4246576A Pending JPS52127261A (en) 1976-04-16 1976-04-16 Mark discrimination system

Country Status (1)

Country Link
JP (1) JPS52127261A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01180483A (en) * 1988-01-12 1989-07-18 Nec Corp Sonar equipment
JP2017519967A (en) * 2015-05-07 2017-07-20 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ System and method for detecting an object

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01180483A (en) * 1988-01-12 1989-07-18 Nec Corp Sonar equipment
JP2017519967A (en) * 2015-05-07 2017-07-20 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ System and method for detecting an object
US10884122B2 (en) 2015-05-07 2021-01-05 SZ DJI Technology Co., Ltd. System and method for detecting an object

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