JPH0441312B2 - - Google Patents

Info

Publication number
JPH0441312B2
JPH0441312B2 JP6814983A JP6814983A JPH0441312B2 JP H0441312 B2 JPH0441312 B2 JP H0441312B2 JP 6814983 A JP6814983 A JP 6814983A JP 6814983 A JP6814983 A JP 6814983A JP H0441312 B2 JPH0441312 B2 JP H0441312B2
Authority
JP
Japan
Prior art keywords
output
receivers
frequency
water surface
beamformer
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.)
Expired
Application number
JP6814983A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59193374A (ja
Inventor
Katsu Ookubo
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP6814983A priority Critical patent/JPS59193374A/ja
Publication of JPS59193374A publication Critical patent/JPS59193374A/ja
Publication of JPH0441312B2 publication Critical patent/JPH0441312B2/ja
Granted 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
JP6814983A 1983-04-18 1983-04-18 水中聴音機 Granted JPS59193374A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6814983A JPS59193374A (ja) 1983-04-18 1983-04-18 水中聴音機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6814983A JPS59193374A (ja) 1983-04-18 1983-04-18 水中聴音機

Publications (2)

Publication Number Publication Date
JPS59193374A JPS59193374A (ja) 1984-11-01
JPH0441312B2 true JPH0441312B2 (en]) 1992-07-07

Family

ID=13365391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6814983A Granted JPS59193374A (ja) 1983-04-18 1983-04-18 水中聴音機

Country Status (1)

Country Link
JP (1) JPS59193374A (en])

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09313763A (ja) * 1996-05-31 1997-12-09 Brother Ind Ltd 下糸巻機構
JP2007252414A (ja) * 2006-03-20 2007-10-04 Juki Corp ミシンの下糸巻き装置

Also Published As

Publication number Publication date
JPS59193374A (ja) 1984-11-01

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