EP4381309A1 - Unterwasserfahrzeug und verfahren zur verbesserung des lagebilds eines unterwasserfahrzeugs - Google Patents
Unterwasserfahrzeug und verfahren zur verbesserung des lagebilds eines unterwasserfahrzeugsInfo
- Publication number
- EP4381309A1 EP4381309A1 EP22754848.4A EP22754848A EP4381309A1 EP 4381309 A1 EP4381309 A1 EP 4381309A1 EP 22754848 A EP22754848 A EP 22754848A EP 4381309 A1 EP4381309 A1 EP 4381309A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- underwater vehicle
- information
- designed
- message
- knowledge
- 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
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
- 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
- G01S5/0009—Transmission of position information to remote stations
-
- 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
Definitions
- the invention relates to underwater communication with an underwater vehicle.
- an underwater vehicle in particular a submarine, traditionally acts independently and has not yet benefited from the possible knowledge of other units.
- the information required to create a tactical situation and operate the sonar system is compiled and managed by the crew of the underwater vehicle itself or by algorithms in autonomous vehicles. However, this information is limited to what the submersible can gather on its own.
- the information that the underwater vehicle can develop itself, i.e. independently, is referred to below as intrinsic knowledge.
- the object of the present invention is therefore to create an improved concept for underwater vehicles.
- the underwater vehicle also includes a guidance system that is designed to generate a situational image of the underwater vehicle based on its own knowledge.
- the underwater vehicle also includes a signal processing unit which is designed to process the digital message and to adapt the situational image based on the digital message or to output tactical information. Adjusting the situational picture can also be referred to as adjusting the situational picture.
- the message can be sent to the underwater vehicle by means of acoustic underwater communication from another platform in or on the water, e.g. a ship, a buoy, an offshore wind turbine, an unmanned underwater vehicle, a submarine or a diver.
- Acoustic underwater communication enables a submerged underwater vehicle to be connected to external platforms over tactically and strategically relevant distances of more than 100 km.
- the data transmission rates that can be achieved are limited by the physical properties of the hydrostatic channel, but are sufficient for operational applications.
- the message can be sent using suitable modulation methods.
- the picture of the situation includes, for example, information about objects in or on the water. These are, for example, watercraft such as ships or underwater vehicles such as submarines or unmanned underwater vehicles. This information can be any of the position, direction, Velocity, type, classification features, etc. that objects have.
- the situation picture is also referred to as the surrounding situation picture.
- the idea is to send the underwater vehicle further information from external platforms (foreign knowledge) that it cannot or should not obtain itself, in addition to the information that it can obtain itself (own knowledge).
- This external information can include data from objects, in particular possible contacts (in particular watercraft), e.g. position, speed, course, classification features, type, etc. of the possible contact, which the underwater vehicle has not yet acquired, not so quickly or not with the precision can.
- This is relevant insofar as the underwater vehicle typically only works using passive sonar in order not to be discovered.
- active sonar which can be safely used by other platforms, can locate targets over longer distances and with greater accuracy.
- Information about objects obtained in this way, which the underwater vehicle cannot or should not determine itself can be transmitted to the underwater vehicle as external knowledge.
- the picture of the situation can be adjusted based on the information obtained about the objects.
- the adaptation takes place continuously in a control process, for example.
- the message ie the foreign knowledge
- This can include, for example, environmental knowledge such as a sound velocity profile, which covers an area around the underwater vehicle in which the underwater vehicle cannot determine the sound velocity profiles itself.
- environmental information such as meteorological information (e.g. wind speed, wind direction) or oceanographic information (e.g. ground conditions, obstacles such as reefs, ground elevations, wrecks in the area, etc.) can also represent useful information for the submersible that it cannot obtain independently under water can determine. This would only be possible when the submersible climbs to periscope depth, which, however, massively increases the risk of the submersible being discovered.
- the situation picture can therefore also be adapted based on the environmental knowledge become.
- Adapting the situation picture based on the environmental knowledge can include a calibration of the sensors in order to be able to determine the self-knowledge more quickly or with greater accuracy.
- the update of the situation picture based on environmental knowledge for example, also takes place continuously in a control process.
- the underwater vehicle can output this information as tactical information. It is also possible to send text messages to the underwater vehicle, for example to send commands or mission-related information to the underwater vehicle. This can also be output as tactical information.
- the digital message includes the absence of cooperative bi-static sonar information. This means that the message is not suitable for determining the position of the object from a runtime difference between the direct sound and the reflection of the message on an object.
- the message may include the absence of a position of the platform that sent the message.
- the message may include a time when the message was sent. However, this point in time is then not used to determine the transit time and thus the distance from the transmitting platform to the underwater vehicle, but rather, for example, to determine whether the information contained in the message is still relevant.
- the sensor of the plurality of sensors which receives the message is designed to receive further digital messages sequentially, ie for example cyclically, in order to obtain further foreign knowledge.
- the signal processing unit is designed to process the further digital messages and, based on the further digital messages as part of the adaptation, to optimize the situation picture sequentially, ie for example cyclically, by means of a control.
- This has the advantage that the picture of the situation is continuously optimized based on external knowledge. So arises with each received Message containing information for the situational picture, a more precise situational picture.
- the regulation takes place, for example, by providing a corresponding variable (measured value) for the information obtained from the message in a method for iterative estimation of the situation picture, for example a Kalman filter.
- the plurality of sensors include an array of waterborne sound receivers, each of which converts waterborne sound into an electrical signal corresponding to the sound pressure as a measured value.
- the signal processing unit receives information about an object as intrinsic knowledge from the electrical signals in order to generate the situational image of the underwater vehicle. This means that the underwater vehicle generates its own picture of the situation.
- the waterborne sound receiver (or also a plurality of waterborne sound receivers) for receiving the message can be arranged separately from the array and optimized for receiving the message.
- the sensor for receiving the digital message is one hydronic receiver (or a plurality of hydronic receivers) of the array of hydronic receivers. That is, the array of hydrophones, or at least a portion thereof, is configured to receive the message.
- the message i.e. the external knowledge
- the signal processing unit separates the digital message as external knowledge from the measured values for generating the situation picture as internal knowledge.
- situation image information is transmitted in the digital message.
- the signal processing unit can then decode the situation image information from the message and, based on the situation image information, validate and/or optimize the information about an object represented in the situation image, in particular a contact.
- the situation picture information can be compiled by a platform, for example a surface unit or a network, for example by means of radar.
- individual contacts can be received through the platform using the automatic identification system AIS and the information received can be encoded in the digital message.
- the information encoded in the message consists, for example, of position data and/or information on the speed and/or course of the recorded contacts.
- the MMSI number Maritime Mobile Service Identity
- the MMSI number offers the possibility of an exact identification of the contact.
- the MMSI number offers the possibility of taking additional information from a target database of the underwater vehicle. Additional information can be, for example, any selection of the following information: picture of the contact, information about the drive train or information from an acoustic database with spectrum and transient noise. Maintaining such (rarely or never changing) information significantly reduces the amount of data to be transmitted.
- the platform can receive information sent by a third party (for example the AIS information), reduce an information content of the information in order to obtain information with reduced information content and encode the information with reduced information content as a message.
- a third party for example the AIS information
- reduce an information content of the information in order to obtain information with reduced information content
- encode the information with reduced information content as a message.
- the signal processing unit is designed to optimize direction formation by means of the array of waterborne sound receivers in order to adapt the situation image.
- a bearing ie the determination of the direction of a contact starting from the underwater vehicle
- passive sonar knowledge of the speed of sound is essential required for the evaluation of the electrical signals of the array of waterborne sound receivers in the beamformer.
- An incorrectly assumed speed of sound in the beamformer leads to deviations in the bearing determined from the true bearing of a contact in an array of waterborne sound receivers.
- the speed of sound is therefore permanently measured locally on the underwater vehicle and taken into account in the sonar system.
- the measurements may contain errors or may not be representative of the sea area.
- the value of the speed of sound assumed for the beamformer can be edited manually by the sonar operator in existing systems. In principle, this allows a correction of the bearing results, but supposed systematic deviations in the bearing results must first be recognized.
- the message received from the underwater vehicle can be used in various ways to support the sonar operator in the event of bearing errors due to incorrect parameterization of the beamformer.
- the position of the contact can be transmitted. From this externally provided target position and the underwater vehicle's own known position, a theoretically expected bearing to the target can be determined for each piece of data received.
- a bearing history based on the received positions for the contact is built up from a plurality of position values received one after the other.
- the course of bearing determined in this way can be displayed as an overlay over the results of the bearing-time record. Deviations between the sonar track in the bearing-time record and the course of the bearing based on the transmitted positions is an indicator of an incorrectly assumed sound velocity in the beamformer and/or incorrect knowledge of the own position.
- the signal processing unit is also designed to optimize a detection of contacts in the electrical signals of the waterborne sound receivers of the array of waterborne sound receivers in order to adapt the situation image. For example, contacts that are difficult to locate with passive sonar systems due to their great distance from the underwater vehicle and/or a low acoustic signature pose a particular challenge for situational image processing. Information about the position and possibly also the type of a target that is difficult to locate passively can now be transmitted to the underwater vehicle by means of the message. This information can be used as follows.
- the beamformer is simultaneously controlled in different beams (engl.: viewing directions).
- the design of the discrete angular grid on which the beams lie is typically such that the drop in level between the main lobes of adjacent beams does not exceed a specific value for the entire frequency range covered. This value is e.g. 3dB.
- the maximum number of viewing directions that can be recorded at the same time is essentially limited by the available computing capacity, so that the drop in level cannot be arbitrarily reduced over the entire all-round view.
- Quiet targets whose true bearing is not exactly on the beam grid may not be detected or only with difficulty.
- the expected bearing to the contact can be determined from the underwater vehicle's own known position.
- the viewing direction density can then be locally increased in the beamformer. Compared to panorama surveillance, the drop in level is reduced within this sector, which increases the probability of the target being detected.
- the detection step in both broadband and narrowband processing is designed to ensure that no contact is missed.
- the exact acoustic signature of a target is initially unknown and is also different for each target. Therefore, detectors evaluate signal properties that are generally valid for all contacts. This means that the existence of a broadband spectrum or the existence of LOFAR lines (LOFAR: LOw Frequency Analysis and Recording) is tested. However, this is more difficult than searching for a specific frequency pattern, for example.
- the acoustic signature of the contact can be derived from this knowledge, for example from a database.
- the detection step for the expected bearing range is now optimized for the (putative) acoustic signature of the contact, the detection performance is improved compared to the standard passive detector.
- a detector can be implemented in parallel with a standard detector. An adjustment of the detection parameters controlled by adaptive algorithms is therefore advisable here.
- the information about a contact can be used for the classification of a contact.
- This information can be used to secure and complete the classification result developed in the submersible.
- a plausibility check supported by algorithms can be carried out by comparing the received results with the results of the classification analysis.
- the information provided externally can be used to enhance the classification results worked out by the underwater vehicle with further properties that have not yet been recorded. These can be, for example, LOFAR lines that have not yet been recorded or also photographs of the contact.
- the signal processing unit is designed to carry out a target motion analysis (dt.
- the passive sonars of an underwater vehicle can primarily only be used to determine bearings for a contact. However, the positions and states of motion of the detected targets are of interest for the construction of a sonar situation image. These target parameters are determined in passive sonar systems with the help of the so-called target motion analysis. In doing so, target information such as distance, course and speed are essentially compiled by suitable evaluation of bearing histories. Depending on the method and available sonar antennas, cross bearings and Doppler shifts can also be evaluated.
- target information from other data sources can already be taken into account in modern target motion analysis methods, such as distance measurements from passive ranging sensors or laser ranging sensors of the periscope.
- the underwater vehicle no longer needs to determine this information itself and thus run the risk of being discovered, but can instead be transmitted to the underwater vehicle by means of the message. In this way, information about the position and the movement status of the contact can be sent to the underwater vehicle. This knowledge can flow into the target motion analysis as additional information in order to improve its results.
- the plausibility check can be carried out automatically using suitable data fusion and support the user in the decision-making process.
- own position own acoustic signature
- performance data of own sonar sensors environmental data (e.g. sound propagation profiles, depth profile of the bottom, bottom type, waves) and/or target data (position of the target, acoustic signature of the target, parameters of the target possibly carried acoustic sensors).
- environmental data e.g. sound propagation profiles, depth profile of the bottom, bottom type, waves
- target data position of the target, acoustic signature of the target, parameters of the target possibly carried acoustic sensors.
- the environmental data would either have to be determined by the boat's own measurements or taken from databases. It must be taken into account that both the measured and the assumed environmental data, in particular the sound propagation profiles, can deviate significantly from the actual conditions in individual cases.
- the required target data would first have to be compiled with the help of the sonar system. Both the environmental data and the target data can now be transmitted to the underwater vehicle in one message.
- other platforms in the submarine's operational area can measure current sound velocity profiles at various positions and make this information available to the submarine vehicle.
- the possible consideration of the spatial variability of the sound propagation profiles in the propagation model allows more realistic predictions than when evaluating only locally measured or database-based sound propagation profiles.
- gliders can be used to continuously record environmental data and forward it by radio.
- Gliders can operate at different depths in the water and record environmental data. On the water surface, these can then be collected for a dive, for example, sent to an operations center, for example by radio.
- information about the waves can be used to parameterize models for environmental noise more realistically.
- Sonarperformance Suite helps improve the picture of the situation in that it is possible to estimate the distance up to which contacts can be expected to be detected. This can be an explanation as to why a contact transmitted by means of the message, for example, has not yet been detected by the underwater vehicle.
- a system is also disclosed that includes the underwater vehicle. Further, the system includes the platform.
- the platform is designed, for example by means of a coding unit, to encode information as a message and a waterborne sound receiver, which is designed to convert the message into waterborne sound.
- the signal processing unit of the underwater vehicle can process this message, in particular decode it, in order to obtain the situation image information and to adjust the situation image of the underwater vehicle based on the situation image information.
- the platform comprises, for example, an offshore wind turbine (or an offshore wind turbine thereof).
- wind farms offer a good infrastructure for means of communication and can serve as platforms for acoustic and non-acoustic sensors and actuators (e.g. sound receivers).
- AIS receivers AIS: automatic identification system
- radar receivers for reconnaissance of the general situation, both above water and in the air, as well as sensors for recording environmental parameters.
- environmental sensors environmental parameters relevant to the mission or navigation, such as the speed of sound, wind speed, wind direction, etc., can be measured and made available.
- offshore wind farms are equipped with sonar transponders (waterborne sound receivers).
- the transponders can also be used to send the information determined by the sensors and/or actuators and encoded in the message to the underwater vehicle.
- the platform comprises, for example, a surface unit, for example a ship.
- Military surface units have a variety of means of communication and sensors. AIS receivers and radar receivers are used to clarify the general situation (overwater and air) and environmental sensors to measure mission and navigation-relevant parameters (wind speed, wind direction, sound speed profile) deployed.
- special surface units have both active and passive sonar systems or dipping sonars (immersion sonars) to generate the underwater situation and/or echo sounders to record depth profiles and sediment layers.
- the surface units have a large amount of information, which can be made available to the underwater vehicle in a targeted manner encoded as a message. The information can be acoustically radiated via active sonar transmitters, with underwater telephony transmitters or using a gateway buoy via underwater communication.
- the platform comprises an (e.g. military or militarily usable) underwater unit.
- this also includes unmanned underwater vehicles and divers or combat swimmers.
- unmanned underwater vehicles include autonomous underwater vehicles (AUV) or remotely operated underwater vehicles (ROV) and gliders.
- unmanned underwater vehicles and other submarines can collect information that is not available to the underwater vehicle in the operation. This is, for example, information about the underwater situation and parameters recorded with environmental sensors such as sound velocity profiles, bottom types and depth profiles. This information can be encoded in the message and acoustically transmitted using underwater communication.
- the platform includes a gateway buoy.
- a gateway buoy is a communication buoy that has satellite or radio receivers or transmitters and waterborne receivers, for example. This can thus encode information received via satellite or radio into the message and radiate it acoustically by means of underwater communication. It forms an important element in the networking of surface and underwater units. Gateway buoys are used to enable surface units and aircraft that have no acoustic transmission capacity in the water (ie no waterborne sound receivers) to exchange information with the underwater vehicle. When using satellite communication, the gateway buoy can be reached from almost anywhere in the world, for example from headquarters or an operations center, and received information can be transmitted into the water layer send or relay information from the water layer to surface units.
- the underwater sound signal includes position information, a reference value of a sound propagation value at the position specified by the position information, and differences of the sound propagation value from the reference value at the position for a plurality of predetermined depths.
- the underwater sound signal can be part of the message that is sent to the underwater vehicle.
- the position information can be the longitude and latitude of the position.
- the following example is also disclosed:
- the example shows an underwater vehicle with a waterborne sound receiver that converts waterborne sound into an electrical signal that corresponds to the sound pressure.
- a signal processing unit decodes a message from the electrical signal in order to adapt, ie to adjust, a situational image of the underwater vehicle, which contains information on a plurality of objects, based on the message.
- the adaptation is done with the aim of optimizing the picture of the situation, that is, for example, to include targets that have not yet been discovered or to increase or improve the number or quality of existing information with regard to targets that have already been detected. This can be done in a continuous control process.
- the adaptation also includes that already existing information is validated based on the message.
- the adjustment refers to both the manual and the machine (that is, automatic, supported by algorithms) adjustment and readjustment of significant manipulated variables such as sound velocity values.
- the decision as to whether the adjustment is to be made manually or automatically is less a question of technical feasibility and more based on operational and security-related considerations.
- Fig. 2 a schematic block diagram of the signal processing process for adapting the picture of the situation of the underwater vehicle.
- the underwater vehicle 20 includes a plurality of sensors 24, 24'.
- the sensor 24 is a waterborne sound receiver, which converts waterborne sound 22 into an electrical signal 26 corresponding to the sound pressure.
- the other sensors 24' also convert corresponding measured values into electrical signals. The measured values and the associated electrical signals form the intrinsic knowledge of the underwater vehicle.
- the underwater vehicle 20 also includes a guidance system 27 and a signal processing unit 28.
- the guidance system 27 is shown as part of the signal processing unit, but can also be a separate unit. Based on its own knowledge, the guidance system 27 generates a situational image of the underwater vehicle.
- the signal processing unit 28 can process a digital message from the electrical signal 26 and, based on the digital message, adjust the situational image of the underwater vehicle 20 or output tactical information. This means that the picture of the situation is adjusted using the knowledge of others.
- a ship 30a, a gateway buoy 30b and an operations center 30c are shown here as platforms.
- the ship 30a can send the message directly to the underwater vehicle using waterborne sound 22 .
- the gateway buoy then converts the message into waterborne sound 20 and then sends it to the underwater vehicle 20.
- the gateway buoy 30b can also do the same with a Make message to be sent from operations center 30c.
- the operations center 30c is shown sending the message via satellite communication 32 to a satellite 34, which also sends the message via satellite communication 32 to the buoy 30b.
- the buoy 30b can in turn send the message to the underwater vehicle 20 using waterborne sound 22 as underwater communication. It would also be conceivable for the operations center to set up a radio link to an aircraft instead of using satellite communication, which in turn would send the message to the buoy by radio link.
- the waterborne sound receiver 24 receives the waterborne sound in step 36.
- the electrical signals 26 representing the waterborne sound form the input signal of the signal processing unit.
- this step 38 this first separates the message(s) 40 (foreign knowledge) from the environmental information 42 (self-knowledge), i.e. the waterborne noise that is generated, for example, by other objects. This step can already contain beamforming before the separation.
- the situational image 46 can be created on the basis of the environmental information 42.
- the situation image 46 is adjusted based on the information that the signal processing unit has decoded from the message 40.
- the adjusted situational image 50 is created.
- the adjusted situational image 50 is updated in a next processing cycle in step 44 using the self-knowledge.
- step 48 the updated adjusted situational picture is adjusted again based on the message.
- a regulation is implemented in order to cyclically optimize the situation picture 50 .
- steps 44 and 48 can also take place together. This means that own knowledge and knowledge from others flow simultaneously into the adjustment of the situation picture as soon as the situation picture has been created for the first time.
- the signal recording (outboard) and the pre-processing steps such as beamforming take place first. Thereafter, signal processing steps for the detection, demodulation and possible decoding of any messages contained in the beam data are carried out.
- the demodulation including the optional decryption is also called decoding. Furthermore, the information contained in the messages is evaluated and presented.
- the (water) sound receivers disclosed are designed for use under water, in particular in the sea.
- the sound receivers are designed to convert waterborne sound into an electrical signal (e.g. voltage or current) corresponding to the sound pressure, the waterborne sound signal.
- the sound receivers have, for example, a piezoelectric material, for example a piezoceramic, as the sensory material.
- the sound receivers can be used for (active and/or passive) sonar (sound navigation and ranging).
- the sound receivers are not suitable for medical applications.
- aspects have been described in the context of a device, it is understood that these aspects also represent a description of the corresponding method, so that a block or a component of a device is also to be understood as a corresponding method step or as a feature of a method step. Similarly, aspects described in connection with or as a method step also constitute a description of a corresponding block or detail or feature of a corresponding device.
- sensors e.g. waterborne sound receiver
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (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 |
|---|---|---|---|
| DE102021208506.7A DE102021208506A1 (de) | 2021-08-05 | 2021-08-05 | Unterwasserfahrzeug und Verfahren zur Verbesserung des Lagebilds eines Unterwasserfahrzeugs |
| PCT/EP2022/070387 WO2023011925A1 (de) | 2021-08-05 | 2022-07-20 | Unterwasserfahrzeug und verfahren zur verbesserung des lagebilds eines unterwasserfahrzeugs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4381309A1 true EP4381309A1 (de) | 2024-06-12 |
Family
ID=82932478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22754848.4A Pending EP4381309A1 (de) | 2021-08-05 | 2022-07-20 | Unterwasserfahrzeug und verfahren zur verbesserung des lagebilds eines unterwasserfahrzeugs |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4381309A1 (de) |
| DE (1) | DE102021208506A1 (de) |
| WO (1) | WO2023011925A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116954137B (zh) * | 2023-09-20 | 2023-12-08 | 北京大学 | 跨介质航行器的运动控制方法、系统、装置、设备及介质 |
| CN117949935B (zh) * | 2024-03-27 | 2024-06-07 | 中国电子科技集团公司第十五研究所 | 一种基于人工智能的自适应水声模型组件 |
| DE102024004505A1 (de) * | 2024-06-07 | 2025-12-11 | Thyssenkrupp Ag | Verfahren zum Erstellen eines aufgeklärten Lagebilds |
| DE102024116013B3 (de) * | 2024-06-07 | 2025-06-26 | Atlas Elektronik Gmbh | Verfahren zum Erstellen eines aufgeklärten Lagebilds |
| DE102024004507A1 (de) * | 2024-06-07 | 2025-12-11 | Thyssenkrupp Ag | Verfahren zum Erstellen eines aufgeklärten Lagebilds |
| DE102024004506A1 (de) * | 2024-06-07 | 2025-12-11 | Thyssenkrupp Ag | Verfahren zum Erstellen eines aufgeklärten Lagebilds |
| DE102024004509A1 (de) * | 2024-06-07 | 2025-12-11 | Thyssenkrupp Ag | Verfahren zum Erstellen eines aufgeklärten Lagebilds |
| DE102024117018A1 (de) * | 2024-06-17 | 2025-12-18 | Thyssenkrupp Ag | Kommunikationssystem |
| CN119756549A (zh) * | 2024-11-26 | 2025-04-04 | 上海交通大学 | 一种目标上浮出水噪声实验室测量系统及方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011018278B4 (de) | 2011-04-20 | 2014-12-11 | Atlas Elektronik Gmbh | Verfahren und Vorrichtung zum Bestimmen von Zielparametern |
| US9817116B1 (en) | 2016-04-29 | 2017-11-14 | R2Sonic, Llc | Acoustic doppler system and method |
| US10578709B1 (en) | 2017-04-20 | 2020-03-03 | Tm Ip Holdings, Llc | Transpositional modulation for defensive measures |
| CN108955678B (zh) * | 2018-08-03 | 2019-08-20 | 国家深海基地管理中心 | 一种深海运载器通信定位导航授时一体化方法及系统 |
| CN111366962A (zh) | 2020-03-12 | 2020-07-03 | 国家深海基地管理中心 | 一种深远海低成本长航时协同导航定位系统 |
-
2021
- 2021-08-05 DE DE102021208506.7A patent/DE102021208506A1/de active Pending
-
2022
- 2022-07-20 WO PCT/EP2022/070387 patent/WO2023011925A1/de not_active Ceased
- 2022-07-20 EP EP22754848.4A patent/EP4381309A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021208506A1 (de) | 2023-02-09 |
| WO2023011925A1 (de) | 2023-02-09 |
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