CA2130217A1 - Underwater Pulse Tracking System - Google Patents

Underwater Pulse Tracking System

Info

Publication number
CA2130217A1
CA2130217A1 CA2130217A CA2130217A CA2130217A1 CA 2130217 A1 CA2130217 A1 CA 2130217A1 CA 2130217 A CA2130217 A CA 2130217A CA 2130217 A CA2130217 A CA 2130217A CA 2130217 A1 CA2130217 A1 CA 2130217A1
Authority
CA
Canada
Prior art keywords
reception
time window
pulse
pulses
actual
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.)
Granted
Application number
CA2130217A
Other languages
French (fr)
Other versions
CA2130217C (en
Inventor
Ross E. Williams
Bryant G. Ragan
Robert H. Kemp, Jr.
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.)
Ion Geophysical Corp
Original Assignee
Laitram LLC
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 Laitram LLC filed Critical Laitram LLC
Publication of CA2130217A1 publication Critical patent/CA2130217A1/en
Application granted granted Critical
Publication of CA2130217C publication Critical patent/CA2130217C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01S7/52004—Means for monitoring or calibrating
    • 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
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/14—Systems for determining distance or velocity not using reflection or reradiation using ultrasonic, sonic, or infrasonic waves
    • 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
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/18—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used
    • 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
    • G01S15/87—Combinations of sonar systems
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
    • G01S5/30—Determining absolute distances from a plurality of spaced points of known location
    • 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
    • G01S7/5273—Extracting wanted echo signals using digital techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
    • G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
    • G01V1/364—Seismic filtering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • G01V1/3808—Seismic data acquisition, e.g. survey design
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/18—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein range gates are used
    • 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
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
    • G01S7/2927—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods by deriving and controlling a threshold value

Abstract

Apparatus and methods for improving signal detection and tracking in underwater acoustic devices receiving a set of acoustic pulses propagated in response to repetitive synchronizing events. Each of the set of pulses is correlated with a replica of each pulse in a receiver in the underwater devices during an associated time window. The correlated output of the receiver is compared to an adjustable threshold characteristic in a detector for selection of the actual pulse according to predetermined criteria for each of the set of pulses. An actual time of reception relative to the synchronizing event is assigned to the selected pulse. Previous actual times of reception are used to estimate the expected time of reception of the associated pulse relative to the next synchronizing event. The estimate is used to adjust the associated time window to encompass the expected time of reception. Previous actual times of reception are compared to corresponding estimated times of reception to develop a measure of the quality of the estimates. The shape of the threshold characteristic and the width of the associated time window are adjusted as a function of the measure of the quality. A preferred threshold characteristic has a parabolic shape with its vertex defining a minimum threshold level at the expected time of reception. High quality measures lower the minimum threshold and narrow the parabola and the time window; low quality measures raise the minimum threshold level and broaden the parabola and the time window. Adaptive signal tracking is thereby provided.
CA002130217A 1993-09-08 1994-08-09 Underwater pulse tracking system Expired - Lifetime CA2130217C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/118,076 1993-09-08
US08/118,076 US5359575A (en) 1993-09-08 1993-09-08 Underwater pulse tracking system

Publications (2)

Publication Number Publication Date
CA2130217A1 true CA2130217A1 (en) 1995-03-09
CA2130217C CA2130217C (en) 1998-02-17

Family

ID=22376390

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002130217A Expired - Lifetime CA2130217C (en) 1993-09-08 1994-08-09 Underwater pulse tracking system

Country Status (6)

Country Link
US (1) US5359575A (en)
EP (1) EP0642033B1 (en)
AU (1) AU669817B2 (en)
CA (1) CA2130217C (en)
DE (1) DE69426849T2 (en)
NO (1) NO315487B1 (en)

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US6289064B1 (en) * 1996-03-07 2001-09-11 Matsushita Communication Industrial Co., Ltd. Synchronization equipment
GB9609612D0 (en) * 1996-05-08 1996-07-10 Geco Prakla Uk Ltd A method of and apparatus for determining the quality of seismic data
GB9625208D0 (en) 1996-12-04 1997-01-22 Olivetti Research Ltd Detection system for determining information about objects
FR2766578B1 (en) * 1997-07-22 1999-10-15 Thomson Csf PULSE COMPRESSION METHOD WITH A SYNTHETIC BAND WAVEFORM
US6292436B1 (en) 1997-10-01 2001-09-18 Input/Output, Inc. Underwater cable arrangements, internal devices for use in an underwater cable, and methods of connecting and internal device to a stress member of an underwater cable
DE19802724A1 (en) * 1998-01-24 1999-07-29 Bosch Gmbh Robert Cross-correlating vehicular ultrasound radar-ranging system providing collision warning
US6002339A (en) * 1998-01-30 1999-12-14 Western Atlas International, Inc. Seismic synchronization system
US6229760B1 (en) * 1999-04-01 2001-05-08 Western Geco Integrated streamer acoustic pod
US6674687B2 (en) 2002-01-25 2004-01-06 Navcom Technology, Inc. System and method for navigation using two-way ultrasonic positioning
US7054229B2 (en) * 2002-04-30 2006-05-30 The Johns Hopkins University Multi-line towed acoustic array shape measurement unit
GB2394048B (en) * 2002-10-12 2006-03-15 Westerngeco Seismic Holdings Acoustic ranging by application of linear period modulated sound
DE102004006015A1 (en) * 2004-02-06 2005-08-25 Robert Bosch Gmbh Method and device for adapting a threshold value of a detection device
US7518951B2 (en) * 2005-03-22 2009-04-14 Westerngeco L.L.C. Systems and methods for seismic streamer positioning
US20070223308A1 (en) * 2006-03-21 2007-09-27 Frivik Svein A Methods of range selection for positioning marine seismic equipment
US7835221B2 (en) * 2006-07-06 2010-11-16 Westerngeco L.L.C. Optical methods and systems in marine seismic surveying
EP2110648B1 (en) * 2008-04-15 2017-05-31 Siemens Aktiengesellschaft Method of processing echo pulses
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US7975614B2 (en) * 2009-09-16 2011-07-12 The United States Of America As Represented By The Secretary Of The Navy Acoustic shotgun system
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US10001575B2 (en) * 2010-06-29 2018-06-19 Pgs Geophysical As Seismic data acquisition system with selectively enabled sensor units, and associated methods
TWI477750B (en) * 2013-08-28 2015-03-21 Ship & Ocean Ind R & D Ct Underwater noise meter
JP6081394B2 (en) 2014-02-28 2017-02-15 株式会社東芝 Positioning system and positioning method
RU2577561C1 (en) * 2015-01-15 2016-03-20 Федеральное государственное бюджетное учреждение науки Тихоокеанский океанологический институт им. В.И. Ильичева Дальневосточного отделения Российской академии наук (ТОИ ДВО РАН) Method of measuring pulse response function structure in time in heterogeneous environment
US10656267B2 (en) 2015-09-08 2020-05-19 Oceanserver Technology, Inc. Underwater acoustic tracking and two way messaging system
DE102016211827B4 (en) * 2016-06-30 2019-05-16 Siemens Healthcare Gmbh Method for determining position information, position determination system and medical device describing a relative position between two relatively movable units
WO2022023509A1 (en) * 2020-07-31 2022-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Cir peak threshold control for toa estimation
CN112462321B (en) * 2020-11-12 2024-02-13 南京世海声学科技有限公司 Acoustic beacon signal interception processing method based on pulse matching accumulation
GB2606160A (en) * 2021-04-26 2022-11-02 Wavefront Systems Ltd Method of filtering acoustic b-scan signals for passive detection of an object underwater

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Also Published As

Publication number Publication date
EP0642033A3 (en) 1997-09-17
NO943308L (en) 1995-03-09
AU7167694A (en) 1995-03-23
AU669817B2 (en) 1996-06-20
CA2130217C (en) 1998-02-17
DE69426849D1 (en) 2001-04-19
US5359575A (en) 1994-10-25
DE69426849T2 (en) 2001-07-26
EP0642033B1 (en) 2001-03-14
NO315487B1 (en) 2003-09-08
EP0642033A2 (en) 1995-03-08
NO943308D0 (en) 1994-09-07

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Legal Events

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Effective date: 20140811