JPS5451559A - Mimic target - Google Patents

Mimic target

Info

Publication number
JPS5451559A
JPS5451559A JP11760577A JP11760577A JPS5451559A JP S5451559 A JPS5451559 A JP S5451559A JP 11760577 A JP11760577 A JP 11760577A JP 11760577 A JP11760577 A JP 11760577A JP S5451559 A JPS5451559 A JP S5451559A
Authority
JP
Japan
Prior art keywords
dots
pulse
receiving
frequencies
receiver
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
JP11760577A
Other languages
Japanese (ja)
Inventor
Tsuneo Miyakane
Tsutomu Fujii
Atsushi Yano
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 JP11760577A priority Critical patent/JPS5451559A/en
Publication of JPS5451559A publication Critical patent/JPS5451559A/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
    • G01S7/523—Details of pulse systems
    • G01S7/524—Transmitters

Abstract

PURPOSE:To prevent howling and provide proportional relations to receiving and transmitting pulse signals by detecting the frequencies of the receiving pulse acoustic waves, outputting proportional electric signals and delaying and blocking the receiving pulse acoustic wave signal with a delay of a fixed time. CONSTITUTION:A control circuit M and a frequency variable oscillator F are added to an ordinary apparatus which receives the pulse acoustic wave dots Pi transmitted from an active sonar in a receiver R and transmits S the same as transmission pulse dots Po after various processing and amplification A. The control circuit M converts the signal, which comprise turning the input pulse acoustic wave dots Pi to pulse voltage dots Ei with the receiver R and turning to output dots Ei' with a blocking circuti B, to the voltage Em proportional to the frequencies and the oscillator F converts the same to dots Ef at a specified frequency conversion rate. These are then transmitted as transmission pulse dots Pi from the transmitter-receiver S via the gate circuit G and amplifier A. By this manner, proportional relations may be given to the frequencies between the transmitting and receiving pulses.
JP11760577A 1977-09-29 1977-09-29 Mimic target Pending JPS5451559A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11760577A JPS5451559A (en) 1977-09-29 1977-09-29 Mimic target

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11760577A JPS5451559A (en) 1977-09-29 1977-09-29 Mimic target

Publications (1)

Publication Number Publication Date
JPS5451559A true JPS5451559A (en) 1979-04-23

Family

ID=14715908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11760577A Pending JPS5451559A (en) 1977-09-29 1977-09-29 Mimic target

Country Status (1)

Country Link
JP (1) JPS5451559A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957181A (en) * 1982-09-27 1984-04-02 Nec Corp Underwater stationary acoustic target

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957181A (en) * 1982-09-27 1984-04-02 Nec Corp Underwater stationary acoustic target
JPH0119551B2 (en) * 1982-09-27 1989-04-12 Nippon Electric Co

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