JPS55155269A - Doppler detection system for active sonar unit - Google Patents

Doppler detection system for active sonar unit

Info

Publication number
JPS55155269A
JPS55155269A JP6300679A JP6300679A JPS55155269A JP S55155269 A JPS55155269 A JP S55155269A JP 6300679 A JP6300679 A JP 6300679A JP 6300679 A JP6300679 A JP 6300679A JP S55155269 A JPS55155269 A JP S55155269A
Authority
JP
Japan
Prior art keywords
doppler
searching
receiver
transmitter
doppler effect
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
JP6300679A
Other languages
Japanese (ja)
Inventor
Kiyohiko Iwasaki
Tsuneo Miyakane
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 JP6300679A priority Critical patent/JPS55155269A/en
Publication of JPS55155269A publication Critical patent/JPS55155269A/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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52004—Means for monitoring or calibrating

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)

Abstract

PURPOSE:To enable the reduction in one's own Doppler effect erasure error, by changing received beams of different directional characteristics for each other in accordance with one's own Doppler effect erasure or with searching. CONSTITUTION:A searching transmitter-receiver 11 for an ultrasonic beam A, which has such directional characteristics that it is wide in the vertical direction, is selected through a switch 10. After a prescribed time, a one's-own-Doppler-effect- erasing transmitter-receiver 12 for an ultrasonic beam A', which has such directional characteristics that it is narrow, is selected. One's own Doppler effect is erased by feedback to a mixer 2 through a sample-hold circuit 5 and a voltage control oscillator 6. After that, good Doppler sonar searching with little error of one's own Doppler effect erasure is performed by the selection of the transmitter-receiver 11 through the switch 10, without being affected by reflection on the surface and bottom of the sea.
JP6300679A 1979-05-22 1979-05-22 Doppler detection system for active sonar unit Pending JPS55155269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6300679A JPS55155269A (en) 1979-05-22 1979-05-22 Doppler detection system for active sonar unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6300679A JPS55155269A (en) 1979-05-22 1979-05-22 Doppler detection system for active sonar unit

Publications (1)

Publication Number Publication Date
JPS55155269A true JPS55155269A (en) 1980-12-03

Family

ID=13216795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6300679A Pending JPS55155269A (en) 1979-05-22 1979-05-22 Doppler detection system for active sonar unit

Country Status (1)

Country Link
JP (1) JPS55155269A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4973162A (en) * 1972-11-13 1974-07-15
JPS49105567A (en) * 1973-01-15 1974-10-05
JPS49123067A (en) * 1973-03-28 1974-11-25
JPS50116064A (en) * 1974-02-26 1975-09-11
JPS5310266A (en) * 1976-07-16 1978-01-30 Mitsubishi Electric Corp Production of soldred semiconductor wafers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4973162A (en) * 1972-11-13 1974-07-15
JPS49105567A (en) * 1973-01-15 1974-10-05
JPS49123067A (en) * 1973-03-28 1974-11-25
JPS50116064A (en) * 1974-02-26 1975-09-11
JPS5310266A (en) * 1976-07-16 1978-01-30 Mitsubishi Electric Corp Production of soldred semiconductor wafers

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