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JPS5739367A - Video signal normalizing circuit of sonar device - Google Patents

Video signal normalizing circuit of sonar device

Info

Publication number
JPS5739367A
JPS5739367A JP55113406A JP11340680A JPS5739367A JP S5739367 A JPS5739367 A JP S5739367A JP 55113406 A JP55113406 A JP 55113406A JP 11340680 A JP11340680 A JP 11340680A JP S5739367 A JPS5739367 A JP S5739367A
Authority
JP
Japan
Prior art keywords
signal
waveform
differential amplifier
video signal
inputted
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
JP55113406A
Other languages
Japanese (ja)
Inventor
Yoshikiyo Sekiguchi
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 JP55113406A priority Critical patent/JPS5739367A/en
Publication of JPS5739367A publication Critical patent/JPS5739367A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To increase target detecting efficiency, by inputting a signal which has received and detected an echo of a transmission pulse, and a signal which has smoothed said signal by a low-pass filter, to a differential amplifier, and detecting a difference of both the signals. CONSTITUTION:A sonar video signal 14 is detected by a detector 11, and a waveform 15 is obtained. This signal 14 is inputted as a waveform 16 to one terminal of a differential amplifier 13 through a low-pass filter 12, and also a detection signal 15 is inputted to the other terminal. An output of the differential amplifier 13 becomes as a waveform 17. In this way, a mean value of an output by a background noise, a reverberation, etc. becomes small, an echo signal from a target is discriminated easily, and fatigue of a measure is reduced, by which the detecting efficiency is greatly elevated.
JP55113406A 1980-08-20 1980-08-20 Video signal normalizing circuit of sonar device Pending JPS5739367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55113406A JPS5739367A (en) 1980-08-20 1980-08-20 Video signal normalizing circuit of sonar device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55113406A JPS5739367A (en) 1980-08-20 1980-08-20 Video signal normalizing circuit of sonar device

Publications (1)

Publication Number Publication Date
JPS5739367A true JPS5739367A (en) 1982-03-04

Family

ID=14611474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55113406A Pending JPS5739367A (en) 1980-08-20 1980-08-20 Video signal normalizing circuit of sonar device

Country Status (1)

Country Link
JP (1) JPS5739367A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62165538U (en) * 1986-04-10 1987-10-21
JPH05142346A (en) * 1991-11-15 1993-06-08 Nec Corp Laser rader device
WO1996010162A1 (en) * 1994-09-28 1996-04-04 Murata Manufacturing Co., Ltd. Signal processor for pyroelectric infrared sensor
JP2013068553A (en) * 2011-09-23 2013-04-18 Nec Corp Active sonar device, and signal normalizing method of active sonar device and program thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62165538U (en) * 1986-04-10 1987-10-21
JPH05142346A (en) * 1991-11-15 1993-06-08 Nec Corp Laser rader device
WO1996010162A1 (en) * 1994-09-28 1996-04-04 Murata Manufacturing Co., Ltd. Signal processor for pyroelectric infrared sensor
US5654550A (en) * 1994-09-28 1997-08-05 Murata Manufacturing Co., Ltd. Signal processor for pyroelectric infrared sensor
JP2013068553A (en) * 2011-09-23 2013-04-18 Nec Corp Active sonar device, and signal normalizing method of active sonar device and program thereof

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