EP3523676A1 - Kalibrierung und reduktion von abbildungsfehlern in fächerecholotsystemen - Google Patents
Kalibrierung und reduktion von abbildungsfehlern in fächerecholotsystemenInfo
- Publication number
- EP3523676A1 EP3523676A1 EP17778166.3A EP17778166A EP3523676A1 EP 3523676 A1 EP3523676 A1 EP 3523676A1 EP 17778166 A EP17778166 A EP 17778166A EP 3523676 A1 EP3523676 A1 EP 3523676A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data set
- fan
- data
- measurement
- ideal
- 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.)
- Withdrawn
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
- G01S7/52003—Techniques for enhancing spatial resolution of targets
-
- 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
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
-
- 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
- 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
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
- G10K11/341—Circuits therefor
Definitions
- the invention relates to a method for the detection / prognosis / measurement of anomalies in media in data sets that can be created by a fan echo sounder system, in particular taking into account sensor / antenna effects and / or bearr data effects, preferably in water columns, wherein a modeled data set of a known topology a measured data set of the known topology is compared. Furthermore, the invention relates to a precise independent method for calibrating a fan-echo sounder system, in particular for the measurement of a water column, a precise independent method for reducing the noise of a measured data set by a fan-echo sounder system, in particular for the measurement of a water column and a more precise independent
- the methods allow a technical calibration of sensors, sensors and antennas and a data-aided evaluation and noise reduction and detection of
- Measurement uncertainties by dynamic models with high significance in the statement e.g. for location-related, qualitative and quantitative statements on objects, disturbances, anomalies or flares.
- the method can also be easily adapted and / or integrated in terms of device technology for existing fan-echo sounder systems, in that the methods are implemented in hardware, e.g.
- adaptation option can also be provided by the hardware of an existing fan-echo sounder system or provided by data carriers with suitable interfaces for respective fan-echo sounder systems.
- DE 10 2011 1 18 788 B4 shows a method and a device for acoustic measurement of a water surface which the disturbances caused by the
- Interference signals by attaching a structure-borne sound pickup at the source of interference, wherein a structure-borne noise spectrum of the source of interference determines and subtracts them from the measurement signals.
- the problems in the prior art are essentially determined by the manner of the measurement, wherein in current systems, the sensors / antennas, ie the subjects in a fan-echo sounder system, the water column or the seabed across the ship, mapped by beamforming and hydrophone arrays. With the so-called far-field assumption (planar wave) one can then allocate at different hydrophones time-delayed incoming signals to their origin directions, which result from the time offset. In the currently known systems, however, generates an acoustic response, the real of a particular
- Direction comes, also always a so-called hallucinated object / signal / anomaly from another direction.
- This signal is known as the sidelobe effect from antenna technology, and the width and location of these sidelobes can be controlled.
- this influence also influences the resolution and width of the so-called desired main lobe.
- the position and width of the main and side lobes ultimately affect the Resolution of the system as well as size and location of the disturbances. All this information is summarized and defined below under the term calibration.
- this should not be done in a laboratory at a manufacturer, but only after the final installation of the system in a ship, for. To take into account aging / temperature effects. Further, it makes sense to perform this calibration before each measurement, i. make any genuine relevant use of the echosounder.
- An object of the inventive method is to reduce the effects of the directional characteristics to produce ideal images from measured WCI that map the physical cause of the measured signals and are largely independent of the system, angle and distance of the objects to the antenna.
- the objects or the measured scenes detected in this way with the inventive method can then be better classified and compared with measurements, which are e.g. at a different time and made from a different angle.
- Another object of the inventive method is the analysis of Multibeam
- Another object of the present invention is to provide a known geometry, e.g. a flat bottom, slope or otherwise known bathymetry or
- the incoming signals can be assigned to actual ground points.
- answers from directions can be detected in which no signal was expected at the given time, will be identified as a hallucinated signal / anomaly.
- a further object of the invention is to use the calibration information in such a way that it is recognized where in the fan echolot image of a measurement a potential ideal signal is superimposed by a sidelobe effect and further statements about how strong this effect is.
- Another object of the invention is to determine what the actual resolution of the fan echo sounder is at a given angle.
- a further object of the invention is, in the case of a measurement which is disturbed with the aid of the calibration information, to generate a data record close to the undisturbed data record, i. to draw the most likely ideal fan echolot image back using an analysis-by-synthesis principle.
- a modeled data set of a known topology in the medium or water column is compared to a measured data set of known topology, has at least one, preferably exactly three, of the following steps: Calibrating a directional characteristic / beam pattern of a measuring system of the
- the calibration of a directional characteristic / beam pattern of a measuring system with at least one sensor / antenna of the fan-echo sounder system can influence the crosstalk behavior of the at least one sensor / antenna.
- the ideal records can be archived in a database and used in
- Beampattern / beam distribution of a measuring system of the fan-echo sounder system, preferably the sensor / antennas is.
- the determination / detection method of measurement uncertainties of a fan-echo sounder system for the measurement of a medium or a water column, with a first data set Creduced and a known calibrated directional characteristic K (beam patterns / beam distribution) of a measuring system of the fan-echo sounder system comprises the steps:
- the device is provided with at least one data carrier and at least one
- Data transmission interface which maintains a data and communication technology compatibility with at least one fan-echo sounder system, equipped for integration and / or adaptation to the respective fan-echo sounder system, at least as disclosed herein
- the at least one data carrier can hold a database which is designed for archiving data records.
- the at least one data carrier can contain a database which stores and updates data records for a directional characteristic (beam pattern) of a measuring system of respective fan-echo sounder system.
- Fig. 1 is a schematic representation of the inventive method for detection
- Fig. 2 is a schematic representation of an embodiment of the inventive
- Fig. 3 is a schematic representation of an embodiment of the inventive
- Fig. 4 is a schematic representation of the inventive method step of the detection of
- FIG. 1 is a schematic representation of the inventive method for detection
- the method has at least one of the following steps:
- Fig. 2 shows a schematic representation of an embodiment of the inventive method step of the calibration.
- the system is calibrated by measuring an already known scene or geometry of which a physical model already exists. This can
- the ocean floor which was previously measured with high accuracy.
- the acoustic image produced with the fan-chan- cholot is henceforth called disturbed image (or even only D).
- the real measurement is simulated with a simulator which generates from the known geometry an ideal sensor image (C), i. without the smearing by the
- Beampattern be recalculated.
- Fig. 3 is a schematic representation of an embodiment of the inventive method step of the interference reduction is shown.
- the (Beampattern conditional) disturbances of the measurements of arbitrary scenes can be reduced by inversion and so the ideal pictures are produced. It may be possible that several solutions (several possible ideal images) are possible for the inversion. In order to reduce the number of solutions, a priori assumptions about the scene can be made and different regularizations can be used (eg the disturbed picture should be explained with the minimum number of real objects).
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016119045.4A DE102016119045A1 (de) | 2016-10-07 | 2016-10-07 | Kalibrierung und Reduktion von Abbildungsfehlern in Fächerecholotsystemen |
PCT/DE2017/100746 WO2018065000A1 (de) | 2016-10-07 | 2017-09-06 | Kalibrierung und reduktion von abbildungsfehlern in fächerecholotsystemen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3523676A1 true EP3523676A1 (de) | 2019-08-14 |
Family
ID=60009386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17778166.3A Withdrawn EP3523676A1 (de) | 2016-10-07 | 2017-09-06 | Kalibrierung und reduktion von abbildungsfehlern in fächerecholotsystemen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3523676A1 (de) |
DE (1) | DE102016119045A1 (de) |
WO (1) | WO2018065000A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110297248A (zh) * | 2019-06-06 | 2019-10-01 | 天津大学 | 基于多波束测深***的数据自动处理方法 |
CN112539886B (zh) * | 2020-11-16 | 2022-06-21 | 中国海洋大学 | 一种海底气体羽状流提取方法及应用 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3520398A1 (de) | 1985-06-07 | 1986-12-11 | Fried. Krupp Gmbh, 4300 Essen | Verfahren und vorrichtung zum ausblenden von stoersignalen |
DE10009644A1 (de) | 2000-03-01 | 2001-09-06 | Siegfried R J Fahrentholz | Echolotverfahren mit Stör-Echo-Unterdrückung bei digitaler Datenausgabe |
WO2008152618A1 (en) | 2007-06-15 | 2008-12-18 | University Of Limerick | A method and apparatus for determining the topography of a seafloor and a vessel comprising the apparatus |
PL2063292T3 (pl) * | 2007-11-16 | 2015-10-30 | Teledyne Reson As | Kalibrowanie wielowiązkowego urządzenia sonarowego |
DE102011118788B4 (de) | 2011-11-17 | 2013-05-29 | Atlas Elektronik Gmbh | Verfahren und Vorrichtung zum akustischen Vermessen eines Gewässergrundes |
-
2016
- 2016-10-07 DE DE102016119045.4A patent/DE102016119045A1/de active Pending
-
2017
- 2017-09-06 WO PCT/DE2017/100746 patent/WO2018065000A1/de unknown
- 2017-09-06 EP EP17778166.3A patent/EP3523676A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018065000A1 (de) | 2018-04-12 |
DE102016119045A1 (de) | 2018-04-12 |
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