NO20003543L - Procedure for fish detection from sonar data - Google Patents

Procedure for fish detection from sonar data

Info

Publication number
NO20003543L
NO20003543L NO20003543A NO20003543A NO20003543L NO 20003543 L NO20003543 L NO 20003543L NO 20003543 A NO20003543 A NO 20003543A NO 20003543 A NO20003543 A NO 20003543A NO 20003543 L NO20003543 L NO 20003543L
Authority
NO
Norway
Prior art keywords
procedure
constitutes
dimension
sonar
sonar data
Prior art date
Application number
NO20003543A
Other languages
Norwegian (no)
Other versions
NO20003543D0 (en
Inventor
Helge Balk
Torfinn Lindem
Original Assignee
Helge Balk
Torfinn Lindem
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
Priority claimed from NO994327A external-priority patent/NO994327D0/en
Application filed by Helge Balk, Torfinn Lindem filed Critical Helge Balk
Priority to NO20003543A priority Critical patent/NO20003543L/en
Publication of NO20003543D0 publication Critical patent/NO20003543D0/en
Priority to EP00959043A priority patent/EP1210618A1/en
Priority to PCT/NO2000/000288 priority patent/WO2001018562A1/en
Priority to CA002383760A priority patent/CA2383760A1/en
Priority to AU70432/00A priority patent/AU7043200A/en
Publication of NO20003543L publication Critical patent/NO20003543L/en
Priority to NO20021069A priority patent/NO20021069L/en

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
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals
    • 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/46—Indirect determination of position data
    • 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/96—Sonar systems specially adapted for specific applications for locating fish
    • 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
    • G01S7/539—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

Oppfinnelsen angår en fremgangsmåte til deteksjon av objekter, fortrinnsvis fisk, fra sonardata. Ekkosignaler fra gjentatte sonarmålinger digitaliseres og registreres i en todimensjonal dataoppstilling der ekkoavstand, alternativt signalets gangtid, utgjør en dimensjon og målingsnummeret, alternativt målingstidspunktet, utgjør den andre dimensjonen. Ved ønsket størrelse av dataoppstillingen utføres todimensjonal filtrering, adaptiv terskling og morfologisk behandling slik at det kan fremstilles et ekkogram med mindre støy og sikrere påvisning av ønskede objekter. Ytterligere formanalyse forbedrer påvisningen ytterligere.The invention relates to a method for detecting objects, preferably fish, from sonar data. Echo signals from repeated sonar measurements are digitized and recorded in a two-dimensional data set where echo spacing, alternatively the signal time, constitutes one dimension and the measurement number, or measurement time, constitutes the other dimension. At the desired size of the data set, two-dimensional filtering, adaptive thresholding and morphological processing are performed so that an echogram with less noise can be produced and more secure detection of desired objects. Further shape analysis further improves detection.

NO20003543A 1999-09-06 2000-07-10 Procedure for fish detection from sonar data NO20003543L (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NO20003543A NO20003543L (en) 1999-09-06 2000-07-10 Procedure for fish detection from sonar data
EP00959043A EP1210618A1 (en) 1999-09-06 2000-09-05 Fish detection method using sonar data
PCT/NO2000/000288 WO2001018562A1 (en) 1999-09-06 2000-09-05 Fish detection method using sonar data
CA002383760A CA2383760A1 (en) 1999-09-06 2000-09-05 Fish detection method using sonar data
AU70432/00A AU7043200A (en) 1999-09-06 2000-09-05 Fish detection method using sonar data
NO20021069A NO20021069L (en) 1999-09-06 2002-03-04 Procedure for fish detection from sonar data

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO994327A NO994327D0 (en) 1999-09-06 1999-09-06 Improved fish detection probability in split beam sonar data
NO20003543A NO20003543L (en) 1999-09-06 2000-07-10 Procedure for fish detection from sonar data

Publications (2)

Publication Number Publication Date
NO20003543D0 NO20003543D0 (en) 2000-07-10
NO20003543L true NO20003543L (en) 2001-03-07

Family

ID=26648997

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20003543A NO20003543L (en) 1999-09-06 2000-07-10 Procedure for fish detection from sonar data

Country Status (5)

Country Link
EP (1) EP1210618A1 (en)
AU (1) AU7043200A (en)
CA (1) CA2383760A1 (en)
NO (1) NO20003543L (en)
WO (1) WO2001018562A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2093546A1 (en) * 2008-02-22 2009-08-26 Siemens Milltronics Process Instruments Inc. A method for locating a wanted echo from unwanted echoes in a time-of-flight level measurement system
US8164983B2 (en) 2009-03-06 2012-04-24 Johnson David A Fish finder
DE102012007979A1 (en) * 2012-04-24 2013-10-24 Krohne Messtechnik Gmbh Method for determining the level of a medium and corresponding device
GB2523561B (en) * 2014-02-27 2016-03-02 Sonardyne Internat Ltd Underwater Environment Reference Map Enhancement and Intruder Detection
CN106019263B (en) * 2016-07-13 2018-03-20 东南大学 Target radial speed measuring method based on more bright spot echo models
EP3579020B1 (en) * 2018-06-05 2021-03-31 Elmos Semiconductor SE Method for recognition of an obstacle with the aid of reflected ultrasonic waves
CN113484867B (en) * 2021-06-25 2023-10-20 山东航天电子技术研究所 Method for detecting density of fish shoal in closed space based on imaging sonar
US12205302B2 (en) * 2022-02-02 2025-01-21 InnovaSea Marine Systems Canada Inc. Fine-scale movement tracking of underwater objects
CN114814801B (en) * 2022-05-05 2025-06-20 青岛海洋科技中心 A method for improving target resolution of fishing sonar images
CN119846612B (en) * 2024-12-23 2025-11-28 上海船舶电子设备研究所(中国船舶集团有限公司第七二六研究所) Multi-beam sonar target detection and imaging method and system
CN119380725B (en) * 2024-12-30 2025-03-18 自然资源部第二海洋研究所 Sounding fish acoustic signal identification method and device based on single-channel hydrophone

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074264A (en) * 1976-01-07 1978-02-14 Hughes Aircraft Company Adaptive threshold clutter processor
US5930200A (en) * 1998-05-08 1999-07-27 Garmin Corporation Depth sounder with object identification feature

Also Published As

Publication number Publication date
EP1210618A1 (en) 2002-06-05
CA2383760A1 (en) 2001-03-15
NO20003543D0 (en) 2000-07-10
WO2001018562A1 (en) 2001-03-15
AU7043200A (en) 2001-04-10

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