JPS641993A - Echo sounder - Google Patents
Echo sounderInfo
- 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
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
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)
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 | Distance measuring method for at least one target object |
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 |
-
1987
- 1987-06-23 JP JP15697887A patent/JPS641993A/en active Pending
Cited By (5)
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 | Distance measuring method for at least one target object |
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69317645T2 (en) | Correlation sonar system | |
FR2370988A1 (en) | RADAR SYSTEM WORKING WITH TWO TYPES OF PULSES | |
CA2204907A1 (en) | Feed waste detector | |
WO2005083626A3 (en) | Magnetostrictive sensor for measuring distances | |
US4290125A (en) | Fish detector capable of detecting species of fish | |
JPS641993A (en) | Echo sounder | |
JPS5353386A (en) | Time difference detection circuit | |
EP0334239A3 (en) | Circuit for obtaining accurate timing information from received signal | |
JPS5376797A (en) | Receiver of fire alarm system | |
JPS5443012A (en) | Amplitude envelope detector of signal waves | |
JPS55149553A (en) | Specific pulse inserting and removing circuit in data transmission system | |
JPS6425026A (en) | Detecting apparatus of leakage of water | |
JPS5544984A (en) | Peak value calculating circuit | |
JPS57187674A (en) | Reflection finder | |
JPS57148274A (en) | Underwater detecting device | |
JPS6218022B2 (en) | ||
JPS6443781A (en) | Radar signal processor | |
JPS568916A (en) | Unique word detecting circuit | |
JPS5377455A (en) | Pcm telemeter demodulation system | |
JPS5517409A (en) | Display system for scanning sonar | |
JPS57141567A (en) | Fault point detecting system for submarine coaxial repeating system | |
JPS5346067A (en) | Ultrasonic detector | |
JPS5441783A (en) | Method and apparatus for detection of ultrasonic wave receiving signals | |
JPS53123903A (en) | Detector of end of playing of record players | |
JPS5618777A (en) | Range measuring apparatus |