JPS641993A - Echo sounder - Google Patents

Echo sounder

Info

Publication number
JPS641993A
JPS641993A JP15697887A JP15697887A JPS641993A JP S641993 A JPS641993 A JP S641993A JP 15697887 A JP15697887 A JP 15697887A JP 15697887 A JP15697887 A JP 15697887A JP S641993 A JPS641993 A JP S641993A
Authority
JP
Japan
Prior art keywords
waveform
correlation
time
signal
depth value
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
JP15697887A
Other languages
Japanese (ja)
Other versions
JPH011993A (en
Inventor
Mikio Mitamura
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
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 filed Critical NEC Corp
Priority to JP15697887A priority Critical patent/JPS641993A/en
Publication of JPH011993A publication Critical patent/JPH011993A/en
Publication of JPS641993A publication Critical patent/JPS641993A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To detect the depth of water easily and accurately, by finding a time whereat the maximum cross-correlation of an estimated theoretical reception waveform and a reception waveform obtained actually is obtained.
CONSTITUTION: A reception signal storage unit 8 stores a reception signal 100 for a required time and reproduces the same. A standard reflection waveform generator 9 generates a standard reflection waveform 10 representing a reception signal waveform determined theoretically from an estimated water depth value. A time delay unit 11 varies sequentially a delay amount given to the waveform 10, until the maximum correlation is obtained by a maximum correlation determination unit 19. Receiving a time-delayed standard reflection waveform 12 and a reproduced reception signal 13, a cross-correlation processor 18 outputs a cross-correlation signal 14 to the maximum correlation determination unit 19. The determination unit 19 outputs a delay time signal 15 to a depth value calculator 20 when it determines that the maximum correlation is obtained at a certain delay time. The signal 15 is converted into a corresponding water depth value by the depth value calculator 20 and outputted therefrom. By this constitution, the depth of water is detected easily and accurately.
COPYRIGHT: (C)1989,JPO&Japio
JP15697887A 1987-06-23 1987-06-23 Echo sounder Pending JPS641993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15697887A JPS641993A (en) 1987-06-23 1987-06-23 Echo sounder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15697887A JPS641993A (en) 1987-06-23 1987-06-23 Echo sounder

Publications (2)

Publication Number Publication Date
JPH011993A JPH011993A (en) 1989-01-06
JPS641993A true JPS641993A (en) 1989-01-06

Family

ID=15639490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15697887A Pending JPS641993A (en) 1987-06-23 1987-06-23 Echo sounder

Country Status (1)

Country Link
JP (1) JPS641993A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4944633A (en) * 1988-07-05 1990-07-31 Jos. Dyson & Sons, Inc. Boat support means
JPH03248082A (en) * 1990-02-27 1991-11-06 Furuno Electric Co Ltd Sea bottom detector
JP2000304862A (en) * 1999-04-06 2000-11-02 Leica Geosystems Ag Method for measuring the distance of at least one target
WO2012124355A1 (en) * 2011-03-11 2012-09-20 シャープ株式会社 Air conditioner
JP2014174069A (en) * 2013-03-12 2014-09-22 Mitsubishi Electric Corp Laser range finding device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4944633A (en) * 1988-07-05 1990-07-31 Jos. Dyson & Sons, Inc. Boat support means
JPH03248082A (en) * 1990-02-27 1991-11-06 Furuno Electric Co Ltd Sea bottom detector
JP2000304862A (en) * 1999-04-06 2000-11-02 Leica Geosystems Ag Method for measuring the distance of at least one target
WO2012124355A1 (en) * 2011-03-11 2012-09-20 シャープ株式会社 Air conditioner
JP2014174069A (en) * 2013-03-12 2014-09-22 Mitsubishi Electric Corp Laser range finding device

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