EP3630597A1 - Système collaboratif de véhicules subaquatiques de suivi d'éléments linéaires immergés et procédé mettant en uvre ce système - Google Patents
Système collaboratif de véhicules subaquatiques de suivi d'éléments linéaires immergés et procédé mettant en uvre ce systèmeInfo
- Publication number
- EP3630597A1 EP3630597A1 EP18726489.0A EP18726489A EP3630597A1 EP 3630597 A1 EP3630597 A1 EP 3630597A1 EP 18726489 A EP18726489 A EP 18726489A EP 3630597 A1 EP3630597 A1 EP 3630597A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- linear element
- magnetic field
- underwater
- vehicles
- 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- Withdrawn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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
- B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
- B63G8/001—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/85—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using magnetographic methods
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
- B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
- B63G8/001—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations
- B63G2008/002—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations unmanned
- B63G2008/004—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations unmanned autonomously operating
-
- 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
- G01V1/3817—Positioning of seismic devices
Definitions
- the present invention generally relates to a collaborative system for underwater vehicles for tracking linear elements such as pipelines, electrical cables, optical fibers or anchor chains, preferably autonomous and not using references. positioning on the surface of the water.
- the invention also has for one object a method implementing this collaborative system.
- pipelines The oil industry has traditionally used remotely operated, remotely controlled submarine vehicles to inspect pipelines that carry oil and gas from wells in the seabed, commonly referred to as pipelines. These pipelines are usually laid on the seabed.
- the objective of these underwater vehicles is to detect pipeline defects such as corrosion, cracks, nicks, openings or displacements, or to monitor the condition of elements associated with pipelines such as their anodes and valves. or their quills. It is checked whether the anodes are present or the degree of corrosion thereof. Corrosion defects can lead to serious damage to pipelines, such as rupture, and therefore possible damage to the environment and significant financial losses as it is necessary to repair or even repair them. to replace them, resulting in a cessation of production.
- linear elements are, for example, electrically conductive copper or aluminum cables, or optical fibers surrounded by metal armor and their repeaters powered by an electric cable, for transmitting information in the form of signals. electric.
- These seabed power cables are also used in other industries, such as the marine wind turbine industry, to export energy.
- US patent application 2016/0231281 describes an example of a submarine vehicle for the inspection of pipelines.
- a vehicle commonly called ROV (Remotely Operated Vehicle)
- ROV Remote Operated Vehicle
- This vehicle is directly placed on the pipeline to be inspected and moves along it by means of wheels 18, as can be seen in Figure 1 of this patent application.
- wheels allow, in particular, to follow the contours of the pipeline when it has non-rectilinear areas such as turns or spokes.
- This type of vehicle needs to be in contact with the pipeline in order to follow the contours.
- an underwater vehicle which is no longer in contact with the linear metal element to be inspected.
- This type of vehicle has a great flexibility of use because it can be launched from a ship and recovered by the latter.
- Such a vehicle is described in the patent application WO 2016/178045.
- the disadvantage of this type of vehicle is that it is not completely autonomous since it follows a predetermined path to follow the contours of the pipeline to be inspected, which implies to know perfectly the geometry and its location on the seabed.
- it is complicated to know in real time the exact position of pipelines because they are constantly moving. In fact, because of the tide phenomenon, the sea currents or the internal pressure, the pipelines have tendency to move.
- the objective of the present invention is therefore to improve underwater vehicle inspection systems of linear elements such as pipelines, cables, anchor chains, electrical or telecommunication cables.
- the invention particularly relates to a collaborative system of underwater vehicles adapted to follow an immersed linear element capable of varying or producing a magnetic field comprising at least a first underwater vehicle for monitoring the position of the linear element, a second underwater vehicle comprising at least a first system able to indicate its position and at least a first measurement means of said magnetic field capable of indicating a first measured angle between the vertical and a first direction of said magnetic field, a third vehicle underwater device comprising at least a second system able to indicate its position and at least a second means for measuring said magnetic field capable of indicating a second angle measured between the vertical and a second direction of said magnetic field, the first underwater vehicle being located vertically or behind the second and third v underwater vehicles, at least one of said vehicles subaqueous devices comprising means for calculating said position of said linear element and the first underwater vehicle being able to use the position of said linear element in order to follow it.
- the collaborative system according to the invention may have one or more additional characteristics among the following:
- At least one of the underwater vehicles is autonomous.
- the calculation means is located on the first underwater vehicle.
- At least one means for measuring said magnetic field is a magnetometer-gradiometer.
- the collaborative system further comprises at least one additional underwater vehicle comprising an optical sensor.
- the subject of the invention is also a collaborative system for underwater vehicles adapted to follow a linear element capable of varying or producing a magnetic field comprising at least a first underwater vehicle for monitoring the position of the linear element, a second underwater vehicle comprising at least a first measuring means capable of indicating its position and at least a first measuring means capable of measuring a first amplitude of said magnetic field, a third underwater vehicle comprising at least a second system capable of indicating its position and at least at least one second measuring means capable of measuring a second amplitude of said magnetic field, the first underwater vehicle being located vertically or behind the second and third underwater vehicles, at least one of said underwater vehicles comprising means for calculating said position of the linear element and the first veh underwater icule being adapted to use the position of said linear element in order to follow it.
- the invention also relates to a method for tracking a linear element, said method comprising the following steps: 1) implementing a collaborative system of underwater vehicles according to any one of claims 1 to 6;
- the linear element is a pipeline.
- At least one of the underwater vehicles comprises induction means inducing an electric current in the linear element.
- the induction means comprises at least one coil.
- FIG. 1 is a schematic view in which a collaborative system of underwater vehicles is implemented according to an exemplary embodiment of the invention
- FIG. 2 is a schematic diagram of the measurement system implemented in an exemplary embodiment of the invention.
- FIG. 1 is a schematic view of another example of a collaborative system according to the invention, wherein a plurality of underwater vehicles is implemented.
- Figure 1 a collaborative system of underwater vehicles 10 according to one embodiment of the invention.
- a linear element 1 to be inspected is placed on a seabed 2.
- This linear element 1 may be, for example, a pipeline for conveying gas or crude oil from a petroleum platform.
- the pipeline is made of steel.
- the invention can be applied to any other material capable of varying a magnetic field or producing a magnetic field. It may be, for example, ferromagnetic materials or cables crossed by an electric current.
- a first underwater vehicle 13 is shown schematically in FIG. 1.
- the first underwater vehicle 13, as well as all the other underwater vehicles used in the various embodiments of the invention, may be autonomous and thus capable of inspect the linear element 1 without assistance from the surface, contrary to what is done for a ROV.
- the first vehicle 13, as well as all the other underwater vehicles described hereinafter comprise a body in which a propulsion system is integrated (not shown).
- the propulsion system includes one or more propellers and a motor to provide mechanical energy.
- the propulsion system comprises one or more turbines.
- the engine is possibly controlled by a computer.
- the first vehicle 13 may also include an Inertial Measurement Unit (IMU) configured to guide the vehicle 13 to a desired position.
- the IMU may also include accelerometers, gyroscopes, and other motion sensors.
- the IMU calculates its own position and velocity based on information from its motion sensors and / or transducers.
- the first vehicle 13 may also include a compass, an altimeter, for measuring its altitude, or a pressure sensor for measuring its depth.
- the first vehicle 13 may also include a system for avoiding obstacles, a system for wireless communication, for example via Wi-Fi, and a High Frequency modem system, acoustic or optical, to determine its position relative to another underwater vehicle.
- the first vehicle 13 also includes fins, transverse thrusters, side and / or vertical to guide it to a desired position. These fins can be used in combination with the propulsion system.
- the first vehicle 13 also includes a flotation system so as to control its depth relative to the surface of the water.
- the first vehicle 13 may include an antenna and an associated low frequency acoustic system for communicating with a ship at long range. This acoustic system can be an acoustic modem capable of receiving the acoustic waves and transforming them into electrical signals and vice versa.
- the acoustic system includes an Ultra-Short Baseline System (USBL) or a Long Baseline Acoustic Positioning System (LBL).
- a complete USBL system includes a transceiver, which is installed on a ship or other underwater vehicle, and a transponder on the first vehicle 13.
- the computer is used to calculate a position from the distances measured by the vehicle. transmitter receiver. For example, an acoustic pulse is transmitted by the transceiver and is detected by the transponder, which itself responds with its own acoustic pulse. This return pulse is detected by the transceiver on the ship or other underwater vehicle. The time between the transmission of the initial acoustic pulse and the detection of the response is measured by the USBL system and converted to a distance.
- the USBL system calculates the distance and the angle from the transceiver to the first vehicle 13.
- the angles are measured by the transceiver which comprises a set of transducers.
- the transceiver comprises, for example, at least three separate transducers at most 30 cm.
- An LBL system uses beacons placed on the seabed having a known position.
- the first vehicle 13 may take a number of forms, for example a submarine shape having a substantially cylindrical or ellipsoidal cross section.
- the body of the first vehicle 13 is carbon composite, glass or a non-electrically conductive material.
- the first vehicle 13 comprises a buoyancy system that can include two chambers intended to be filled by the surrounding water, or emptied thereof, to control the depth of the first vehicle 13.
- the first vehicle 13 comprises a motor for rotating the propellers to produce a thrust.
- the propellers receive water via a duct formed in the body of the first vehicle 13. They can also be disposed outside the vehicle 13.
- the duct has an opening for the entry of water and an opening allowing the expulsion of water. These openings may be located on the front, the rear or the sides of the body of the first vehicle 13.
- the body of the first vehicle 13 may also include ducts or turbines to control its rotational movements and / or translation. It is also possible to see in FIG. 1 a second underwater vehicle 11, preferably an autonomous vehicle, and a third underwater vehicle 12, preferably also autonomous, called respectively the second vehicle 11 and the third vehicle 12.
- the second and third vehicles have the same characteristics than those previously seen for the first vehicle 13.
- the second vehicle 11 is positioned on one side of the pipeline and the third vehicle 12 is positioned opposite this side so that the pipeline 1 is between the second vehicle 11 and the third vehicle 12.
- the longitudinal axes of the second and third vehicles 11,12 are substantially parallel to the direction of the pipeline 1 between the second and third vehicles 11,12.
- Each of the second and third vehicles 11, 12 comprises at least one means for measuring the magnetic field (not shown), for example a three-axis magnetometer.
- Each magnetic field measuring means measures the direction of the magnetic field.
- Figure 2 is an illustration of the configuration implementing the second vehicle 11 and the third vehicle 12 for this measurement.
- Underwater vehicles position relative to each other by means of a positioning and acoustic communication network comprising at least one relative positioning means of high precision, of the order of a few centimeters, with a communication range of less than 200 meters and a high data transfer rate, of about 100 bytes per second, thus allowing a comparison at high frequency, that is to say several times per second, data from the sensors installed on each vehicle, such as depth sensors or means for measuring the magnetic field.
- the surface of the water 20, the seabed 2 and the pipeline 1 can be seen in a partially buried position. Also visible are the second vehicle 11 and the third vehicle 12 positioned on either side of the pipeline 1.
- the second vehicle 11 is located at a first depth 21 and a first position XI, Y1, ZI with respect to the surface of the water 20 and the third vehicle 12 is located at a second depth 22 and a second position X2, Y2, Z2 with respect to the surface of the water 20.
- These depths and positions are determined by means of depth sensors conventionally used in the field, such as light sonar, IMU, GPS or USBL system described above, but an absolute positioning of the vehicles is not necessary, a relative positioning of the vehicles between them is sufficient. Absolute positioning can be useful when, for example, you want to maintain the position map of a pipeline.
- the second vehicle 11 includes a first magnetometer 28 indicating the direction of the pipeline 1 and the third vehicle 12 has a second magnetometer 29 indicating the direction of the pipeline 1.
- the pipeline 1 varies the Earth's magnetic field thus allowing the first and second magnetometers to determine the direction. More specifically, the first magnetometer 28 indicates a first angle 26 measured between the vertical and a first direction 30 and the second magnetometer 29 indicates a second angle 27 measured between the vertical and a second direction 31. Moreover, the second and third vehicles 11 , 12 are spaced apart by a distance 23. The distance 23 is determined by the various positioning means, seen previously, which are installed on each underwater vehicle. Performing a trigonometry calculation involving the first angle 26, the second angle 27 and the positions of the second vehicle 11 and the third vehicle 12 it is then possible to accurately determine the position of the pipeline 1. The pipeline is at the intersection of the first direction 30 and in the second direction 31.
- This position is transmitted to the vehicle 13, called measuring vehicle, which adapts its path, in depth and also in a plane horizontal with respect to the surface of the water, according to this position in order to follow precisely the pipeline to perform an inspection, for example by camera.
- the images are stored in the computer of the vehicle 13 or else sent directly by acoustic waves, WI-FI, RF, GSM or Iridium to a ship so that they are analyzed in real time.
- the second vehicle 11 and the third vehicle 12 are at the same depth.
- the second vehicle 11 comprises at least one scalar magnetometer 28 'measuring a first amplitude of the magnetic field and the third vehicle 12 comprises at least one scalar magnetometer 29' measuring a second amplitude of the magnetic field.
- Pipeline 1 is vertical to the centroid of measured amplitudes. It has been described a configuration implementing magnetometers, but it is also possible to mount the magnetometers 28,29, or any other magnetic field measuring means, such as a coil-type inductive system.
- each vehicle Preferably and in order to increase the measurement accuracy, it can be installed on each vehicle at least three magnetometers, operating in a two-by-two gradiometer: a first magnetometer at the end of a first fin and a second at the end a second fin and finally a third magnetometer located approximately in the middle of the underwater vehicle. It is also possible to install them transversely or longitudinally with respect to the body of the vehicle. To date, an embodiment of the invention has been described making it possible to inspect a linear element that varies the earth's magnetic field or produces a magnetic field, such as for example a pipeline, a pipe or even an electric cable powered by electricity.
- At least one of the second and third vehicles 11, 12 further comprises a system of coils for inducing an electric current in the linear element 1 so that there is induced a magnetic field measurable by the first and second magnetometers 28.29.
- This embodiment is particularly interesting when it is necessary to inspect electrical cables that may possibly be broken, but it can also be used to inspect an anchor chain, a small pipe, an optical fiber surrounded by metallic armor or repeaters linked to an optical fiber.
- the arrangement between the first vehicle 13, the second vehicle 11 and the third vehicle 12 is the same as that shown in Figures 1 and 2, except that the second vehicle 11 and / or the third vehicle 12 and / or the first vehicle 13 and / or a fourth vehicle comprises a system of coils adapted to generate an electric current in the linear element 1.
- FIG. 3 Another embodiment of the present invention.
- This collaborative system 31 comprises a first vehicle 32, called scout, comprising an optical sensor, such as a camera, in order to detect the visible parts of the linear element 33, for example a pipeline, and thus to determine its trajectory.
- a first vehicle 32 comprising an optical sensor, such as a camera
- the first vehicle 32 does not provide information about its trajectory.
- a second vehicle 34 comprising an acoustic sensor, such as a sediment sounder, or a multibeam probe to determine whether the linear element 33 is buried.
- a multibeam probe has multiple beams to simultaneously measure the depth according to several directions.
- the first vehicle 32 may include a sediment sounder instead of the optical sensor or a multibeam probe or any combination of these three sensors.
- a third vehicle 35 comprising a first magnetometer and a fourth vehicle 36 comprising a second magnetometer in a configuration identical to that described above and as shown in FIGS. Figures 1 and 2.
- the information from the first vehicle 32, the third vehicle 35 and the fourth vehicle 36 are transmitted to the second vehicle 34 which merges and processes them to precisely determine the position of the linear element 33.
- This information is then transmitted to a fifth vehicle 37, called measurer.
- the vehicle 37 is positioned relative to the first vehicle 32, the second vehicle 34, the third vehicle 35 and the fourth vehicle 36.
- the fifth vehicle 37 transmits the information transmitted to it and the data acquired by itself to a sixth vehicle 38 and a seventh vehicle 39 each including, for example, side sonars for inspecting the sides or below the linear element 33.
- a sixth vehicle 38 and a seventh vehicle 39 each including, for example, side sonars for inspecting the sides or below the linear element 33.
- this inspection below it will determine if it is correctly placed on the seabed and not between two dunes . Indeed, this configuration induces constraints in the pipeline thus generating fatigue problems.
- the information from the second vehicle 34 is transmitted directly to the sixth and seventh vehicles 38,39 without passing through the fifth vehicle 37.
- the information collected by the fifth vehicle 37 is transmitted to the sixth and seventh vehicles 38,39 and processed directly by them.
- the sixth and seventh vehicles 38, 39 are slaves of the fifth vehicle 37 and follow exactly the same trajectory as the latter.
- At least one of the underwater vehicles may comprise one or more sensors or devices such as Hydrocarbon detectors or meters, in the case of pipeline inspection missions, lateral sonar, multibeam sonar, video cameras or profile meters or any other system for determining geometry, surface condition and the physicochemical parameters of the environment of the linear element (1, 33).
- sensors or devices such as Hydrocarbon detectors or meters, in the case of pipeline inspection missions, lateral sonar, multibeam sonar, video cameras or profile meters or any other system for determining geometry, surface condition and the physicochemical parameters of the environment of the linear element (1, 33).
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1754905A FR3066996B1 (fr) | 2017-06-02 | 2017-06-02 | Systeme collaboratif de vehicules subaquatiques de suivi d'elements lineaires immerges et procede mettant en oeuvre ce systeme |
PCT/EP2018/064119 WO2018219975A1 (fr) | 2017-06-02 | 2018-05-29 | Système collaboratif de véhicules subaquatiques de suivi d'éléments linéaires immergés et procédé mettant en œuvre ce système |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3630597A1 true EP3630597A1 (fr) | 2020-04-08 |
Family
ID=59930467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18726489.0A Withdrawn EP3630597A1 (fr) | 2017-06-02 | 2018-05-29 | Système collaboratif de véhicules subaquatiques de suivi d'éléments linéaires immergés et procédé mettant en uvre ce système |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3630597A1 (fr) |
FR (1) | FR3066996B1 (fr) |
WO (1) | WO2018219975A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114426085A (zh) * | 2022-02-11 | 2022-05-03 | 中国人民解放军海军特色医学中心 | 一种智能潜水跟随机器人、跟随系统及跟随方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110095756B (zh) * | 2019-05-21 | 2023-01-03 | 中国科学院深海科学与工程研究所 | 一种基于水声定位系统的水下目标速度计算方法 |
CN112243194A (zh) * | 2020-10-13 | 2021-01-19 | 上海正阳电子有限公司 | 自潜型移动传感设备、控制方法、计算机设备及存储介质 |
NO347366B1 (en) * | 2021-10-14 | 2023-10-02 | Argeo Robotics As | A system for tracking a subsea object |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5894450A (en) * | 1997-04-15 | 1999-04-13 | Massachusetts Institute Of Technology | Mobile underwater arrays |
DE102010035898B3 (de) | 2010-08-31 | 2012-02-16 | Atlas Elektronik Gmbh | Unbemanntes Unterwasserfahrzeug und Verfahren zum Betrieb eines unbemannten Unterwasserfahrzeugs |
EP2452868B1 (fr) * | 2010-11-11 | 2013-01-02 | Atlas Elektronik Gmbh | Véhicule sous-marin sans pilote et son procédé de récupération |
JP5806568B2 (ja) | 2011-09-26 | 2015-11-10 | 川崎重工業株式会社 | 水中移動型検査装置及び水中検査設備 |
US9746444B2 (en) * | 2012-10-27 | 2017-08-29 | Valerian Goroshevskiy | Autonomous pipeline inspection using magnetic tomography |
WO2015134473A2 (fr) * | 2014-03-05 | 2015-09-11 | C&C Technologies, Inc. | Système d'inspection sous-marine à l'aide d'un véhicule sous-marin autonome (auv) en combinaison avec une unité de micro bathymétrie à laser (laser de triangulation) et d'une caméra à haute définition |
WO2016049645A1 (fr) | 2014-09-26 | 2016-03-31 | Delta Subsea, Llc | Systèmes, appareil et procédés d'inspection de surfaces immergées |
EP3292040B1 (fr) | 2015-05-05 | 2019-03-27 | Total S.A. | Véhicule sous-marin pour l'inspection d'une structure sous-marine dans un corps d'eau, et procédé associé |
-
2017
- 2017-06-02 FR FR1754905A patent/FR3066996B1/fr not_active Expired - Fee Related
-
2018
- 2018-05-29 EP EP18726489.0A patent/EP3630597A1/fr not_active Withdrawn
- 2018-05-29 WO PCT/EP2018/064119 patent/WO2018219975A1/fr active Application Filing
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114426085A (zh) * | 2022-02-11 | 2022-05-03 | 中国人民解放军海军特色医学中心 | 一种智能潜水跟随机器人、跟随系统及跟随方法 |
CN114426085B (zh) * | 2022-02-11 | 2022-11-08 | 中国人民解放军海军特色医学中心 | 一种智能潜水跟随机器人、跟随系统及跟随方法 |
Also Published As
Publication number | Publication date |
---|---|
WO2018219975A1 (fr) | 2018-12-06 |
FR3066996A1 (fr) | 2018-12-07 |
FR3066996B1 (fr) | 2022-07-01 |
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