EP4348237A1 - Robot piloté dédié à l'inspection de soudures par ultrasons - Google Patents
Robot piloté dédié à l'inspection de soudures par ultrasonsInfo
- Publication number
- EP4348237A1 EP4348237A1 EP22723132.1A EP22723132A EP4348237A1 EP 4348237 A1 EP4348237 A1 EP 4348237A1 EP 22723132 A EP22723132 A EP 22723132A EP 4348237 A1 EP4348237 A1 EP 4348237A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- robot
- robot according
- relative
- frame
- rotatably mounted
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0609—Display arrangements, e.g. colour displays
- G01N29/0618—Display arrangements, e.g. colour displays synchronised with scanning, e.g. in real-time
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/225—Supports, positioning or alignment in moving situation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2481—Wireless probes, e.g. with transponders or radio links
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/101—Number of transducers one transducer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2634—Surfaces cylindrical from outside
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/267—Welds
Definitions
- the technical field of the invention is that of non-destructive testing by ultrasound and in particular the control of the structural integrity of a structure such as a pressurized container. More specifically, the present invention relates to a piloted robot dedicated to the inspection of welds by ultrasound.
- a control of the integrity of the welds is carried out regularly over time.
- These inspections aim in particular to determine the appearance of a defect, such as a crack or a zone of corrosion, in a weld.
- the control means implemented are of the non-destructive type, such as for example ultrasound mapping.
- the ultrasonic inspections of pressurized container welds are generally carried out by means of scanners manipulated by operators close to the surfaces to be inspected. Upstream of the checks, it is necessary to carry out several essential preparation actions in order to make the checks possible.
- the first step is to mount scaffolding around the equipment so that the operators can take the hand scanner to the welds to be checked.
- the invention aims in particular to effectively remedy the aforementioned drawbacks by proposing a mobile robot for controlling at least a portion of a weld made on a ferromagnetic structure, such as pressure equipment, said robot comprising:
- an on-board ultrasonic generator able to generate electrical signals intended to be transformed into ultrasonic signals by the ultrasonic probe, and to receive and process electrical measurement signals from the ultrasonic probe
- each frame carrying two motorized magnetic wheels
- the second pivot connection allowing relative rotational movement of a frame with respect to the other frame around a second axis of rotation corresponding to a transverse axis of the robot.
- the invention has the advantage of not requiring preparatory work as to its commissioning on a structure (surface condition, scaffolding).
- the invention also makes it possible, by embedding the ultrasonic generator on the mobile robot, to optimize the processing of the ultrasonic measurement signals with respect to a system architecture in which the ultrasonic generator is remote with respect to the ultrasonic probes. Indeed, the invention avoids the deterioration of the measurement signals due to their transmission over a short distance between the ultrasonic probes and the on-board ultrasonic generator.
- said robot comprises a double hinge forming the two pivot links mounted between the two frames.
- the double hinge comprises a first element, a second element, and a third element hinged together.
- the first element is rotatably mounted relative to the other two elements around the longitudinal axis.
- said robot comprises an angular limitation device capable of limiting an angular displacement in rotation of the first element relative to the other two elements.
- the angular limitation device comprises a movable stud inside a circumferential groove.
- the third element is rotatably mounted relative to the second element around the transverse axis.
- said robot comprises an angular limitation device capable of limiting an angular displacement in rotation of the third element relative to the second element.
- the angular limitation device comprises an upper stop piece and a lower stop piece against which one end of the third element can come into abutment following an extreme angular displacement of the third element.
- said robot comprises a laser sensor capable of projecting a laser line onto the ferromagnetic structure.
- said robot comprises a device for maintaining an orientation of the laser sensor relative to a surface to be inspected when a frame moves in rotation relative to the other frame around the longitudinal axis.
- the holding device comprises: - a slider movable in translation along a mast rotatably mounted around the longitudinal axis, said slider carrying the laser sensor,
- first hoop having a first end rotatably mounted on the first element and a second end rotatably mounted relative to the slider
- a second hoop having a first end rotatably mounted on the second element and a second end rotatably mounted relative to the slider.
- said robot comprises two motors, one motor driving two motorized magnetic wheels of a frame.
- said robot comprises coupling nozzles arranged close to the ultrasonic probe.
- said robot comprises means for pressing the ultrasonic probe against the ferromagnetic structure.
- the invention also relates to a welding control system comprising a mobile robot as defined above and a control station in communication with said robot, said control station comprising an energy source for supplying electrical energy the robot and a fluid pump to supply the robot with coupling.
- said system further comprises a magnetic take-off mat made mainly of a non-magnetic material and provided with means for fixing to the ferromagnetic structure.
- the invention further relates to a method of using a welding control system as defined above with a ferromagnetic structure comprising:
- Figure 1 is a schematic representation of an ultrasonic welding control system comprising a mobile robot disposed on a pressure vessel and a ground control station;
- FIG. 2a [Fig. 2b] [Fig. 2c] [Fig. 2d] Figures 2a, 2b, 2c and 2d are respectively exploded perspective, side, top and front views of the robot of the welding control system of Figure 1;
- FIG. 3 is a perspective view of a control station of the welding control system of Figure 1;
- Figure 4 is a perspective view of a couplant pump associated with the control station
- Figure 5 is a diagram of the different steps of a method of using the ultrasonic welding control system;
- Figure 6 is a perspective view of an inspection robot according to the invention provided with a device for maintaining an orientation of a laser sensor orthogonal to the surface to be inspected;
- Figure 7 is a perspective view of the double hinge integrated in the inspection robot according to the invention allowing the rotation of the frames relative to each other along two axes of rotation;
- FIG. 8 is a perspective view of the double hinge and of the device for maintaining an orientation of the laser sensor according to the invention.
- Figure 9 is an exploded perspective view of the double hinge and of the device for maintaining an orientation of the laser sensor according to the invention.
- FIG. 10a [Fig. 10b] Figures 10a and 10b illustrate the rotation of the double hinge according to the invention around a longitudinal axis of the inspection robot according to the invention;
- FIG. 11a [Fig. 11 b] Figures 11 a and 11 b illustrate the rotation of the double hinge according to the invention around a transverse axis of the inspection robot according to the invention;
- FIG. 12a [Fig. 12b] Figures 12a and 12b illustrate the operation of the holding device during rotation of the double hinge around the longitudinal axis of the inspection robot according to the invention.
- Figure 1 shows a system 10 comprising a mobile robot 11 intended to carry out the inspection of at least a portion of a weld 12 made on a ferromagnetic structure 13, such as a pressurized container, for example a PSA for "Pressure Swing Adsorber" in English.
- the control is carried out by means of ultrasonic probes 15 on board the robot 11 (cf. FIGS. 2a).
- the robot 11 is remotely controlled by at least one operator 16 via a command station 17 described in more detail below.
- the data acquired during the inspections are reviewed and analyzed in real time during the inspection in order to decide on the presence or absence of defects inside the weld 12.
- the mobile robot 11 comprises two frames 18.1, 18.2.
- Each frame 18.1, 18.2 carries two motorized magnetic wheels 20 intended to be magnetized to the ferromagnetic structure 13.
- first pivot link 21.1 allows relative rotational movement of a frame 18.1, 18.2 with respect to the other frame 18.1, 18.2 around a first axis of rotation X1 corresponding to a longitudinal axis of the robot 11.
- the second pivot link 21.2 allows relative rotational movement of a frame 18.1, 18.2 with respect to the other frame 18.1, 18.2 around a second axis of rotation X2 corresponding to a transverse axis of the robot 11.
- the longitudinal axis X1 is an axis perpendicular to an axis of the wheels Xr when they are straight.
- the transverse axis X2 is an axis parallel or coincident with the axis of the wheels Xr when they are straight.
- a double hinge 22 forming the two pivot connections 21.1, 21.2 is mounted between the two frames 18.1, 18.2.
- Such a configuration allows the robot 11 to adapt to the curvature of a ferromagnetic structure 13 of cylindrical shape and to make a turn on a cylinder in order to pass from a longitudinal position to a circular position during its movement, it that is to say a position in which the longitudinal axis of the robot is not parallel to the axis of the structure.
- the double hinge 22 comprises three elements 221, 222, and 223 hinged together.
- the first element 221 and the second element 222 have a U-shape.
- first element 221 has a width greater than second element 222 so as to have ends arranged on either side of second element 222.
- Third element 223 has the shape of an elongated plate provided with flared ends.
- the first element 221 is rotatably mounted relative to the other two elements 222, 223 around the longitudinal axis X1 via a first rod 224 forming the pivot connection 21.1.
- the first rod 224 extends along the longitudinal axis X1 and passes inside passage openings provided in the first element 221, the second element 222, and the third element 223.
- the first rod 224 passes through a passage opening 225 made in a first end flange of the first element 221, a passage opening 229 made in a side eyelet, a passage opening 230 made in the second element 222, a passage opening 231 made in the second element 222, a passage opening 232 made in a side eyelet and a passage opening 233 made in an end rim of the first element 221.
- FIGS. 10a and 10b illustrate a rotation R1 of the first element 221 relative to the second element 222 around the longitudinal axis X1.
- the third element 223 is rotatably mounted relative to the second element 222 around the transverse axis X2 via a second rod 241 forming the pivot connection 21.2 .
- the rod 241 extends along the transverse axis X2.
- the rod 241 carried by a support piece passes through the second element 222.
- FIGS. 11a and 11b illustrate a rotation R2 of the third element 223 with respect to the second element 222 around the transverse axis X2.
- the first element 221 comprises a fixing interface 250 with one of the frames 18.1, 18.2, as shown in FIG. 9.
- This fixing interface 250 comprises at least one opening 251 for receiving a fixing member, such as a screw, a rivet, or any other fastener suitable for the application.
- the third element 223 has a fixing interface 254 with the other frame 18.1, 18.2, as shown in Figures 7, 8, 9, 11a and 11b.
- This fixing interface 254 comprises at least one opening 255 for receiving a fixing member, such as a screw, a rivet, or any other fixing member suitable for the application.
- each attachment interface 250, 254 has two openings for receiving fasteners.
- each fixing interface 250, 254 may comprise a single opening or more than two openings for receiving fixing members.
- An angular limitation device 235 visible in particular in Figures 7, 10a, and 10b, can limit an angular displacement in rotation around the axis X1 of the first element 221 relative to the other two elements 222 and 223.
- This angular limitation device 235 comprises a stud 237 movable inside a circumferential groove 238 whose ends constitute angular displacement stops.
- the stud 237 is mechanically linked to one of the two elements 222 or 223; while the circumferential groove 238 belongs to the first element 221.
- the structure may be reversed, that is to say that the circumferential groove 238 may belong to one of the two elements 222 or 223 while the stud 237 is mechanically linked to the first element 221 .
- An angular limitation device 245 visible in Figures 7, 11a and 11b makes it possible to limit an angular displacement in rotation around the axis X2 of the third element 223 with respect to the second element 222.
- This angular limitation device 245 comprises an upper abutment part 247 and a lower abutment part 248 against which one end of the third element 223 can bear following an extreme angular displacement of the third element 223.
- the angular position of the abutment parts 247, 248 can be modified so as to adapt an angular displacement of the third element 223.
- the angular limitation devices 235, 245 allow the robot 11 to adapt to the diameter of the container under pressure 13 to be inspected.
- the robot 11 includes a device 260 for maintaining an orientation of a laser sensor 39 relative to a surface to be inspected.
- a device 260 for maintaining an orientation of a laser sensor 39 relative to a surface to be inspected.
- the holding device 260 is configured to hold the laser sensor 39 perpendicular to the surface to be inspected, in particular perpendicular to the surface, in the transverse direction X2.
- the holding device 260 is configured so that the laser sensor 39 remains plumb with respect to the surface to be inspected during the measurement.
- the device 260 comprises a slider 280 movable in translation along a mast 281 .
- the slider 280 carries the laser sensor 39.
- the mast 281 is rotatably mounted around the longitudinal axis X1.
- the mast 281 has a fork-shaped end 282 comprising openings cooperating with the rod 224.
- a first hoop 261, corresponding to a part in the shape of an arc of a circle, has a first end element 221 and a second end rotatably mounted relative to the slider 280.
- a second hoop 267 corresponding to a piece in the shape of an arc of a circle, comprises a first end rotatably mounted on the second element 222 and a second end rotatably mounted relative to the to slider 280.
- an axis 262 with a low coefficient of friction extends between two flanges 263, 264 parallel between them from the first element 221 or the second element 222.
- This pin 262 is intended to cooperate with an annular bearing arranged inside a through opening made in a corresponding end of a hoop 261, 267.
- Figures 12a and 12b illustrate a movement of the slider 280 along the mast 281 during a rotation R1 of a frame 18.1, 18.2 relative to the other frame 18.1, 18.2 around the longitudinal axis X1.
- the translation movement of the slider 280 keeps the orientation of the laser sensor 39 perpendicular to the surface to be inspected.
- the robot 11 further comprises two motors 24.1, 24.2, a motor 24.1, 24.2 ensuring a drive of two magnetic wheels 20 of a corresponding frame 18.1, 18.2.
- a motor 24.1, 24.2 is fixed on a corresponding frame 18.1, 18.2.
- a motor 24.1, 24.2 may be associated with a speed reducer so as to adapt the speed of the electric motor 24.1, 24.2 to that of the wheels 20 of the robot 11 .
- One of the frames 18.1, 18.2 carries an onboard ultrasonic generator 25, as shown in Figure 2a.
- the ultrasonic generator 25 is able to generate electrical signals intended to be transformed into ultrasonic signals by the ultrasonic probes 15, and to receive and process electrical measurement signals from the ultrasonic probes 15.
- a box 27 containing the electronics of control motors 24.1, 24.2 and the ultrasonic generator 25 is carried by the other frame 18.1, 18.2.
- the motor control electronics 24.1, 24.2 could be distributed between the box 27 and a second electronic box 28.
- the robot 11 comprises two ultrasonic probes 15.
- a probe 15 comprises an ultrasonic sensor 30 and a shoe 31 associated.
- the function of the shoe 31 is to protect the sensor 30 and to transmit the ultrasonic signals from the sensor 30 to the weld 12 to be inspected.
- pressing means 33 for example taking the form of spring slides 33, ensure a pressing of a corresponding probe 15 against the ferromagnetic structure 13.
- spring 33 can act on a support 34 in the form of a fork carrying the probe 15.
- the "probe 15-support 34-spring slider 33" assembly is mounted on a slider 36 for adjusting the recoil of the probe 15 relative to the weld 12 to be inspected. It is thus possible to adapt a distance between the probe 15 and the weld 12 to be inspected along the longitudinal direction D of the recoil adjustment slide 36 which is parallel to the transverse axis X2. Once this distance has been set, the operator can immobilize the ultrasonic probe 15 in position at the desired location of the slide 36 in order to be able to carry out the measurements.
- Nozzles 37 placed close to the ultrasonic probe 15 ensure the projection of a couplant.
- the couplant is a liquid, such as water, necessary for ultrasound transmission which is applied to the surface of the ferromagnetic structure 13 to be inspected so as to create a film of liquid under the shoe 31 .
- the couplant is routed via a conduit intended to be connected to a connector 38 located on an upper face of the probe 15.
- a laser sensor 39 clearly visible in Figures 2a and 2b is able to project a laser line on the ferromagnetic structure 13 to ensure detection and monitoring of a weld 12 to be inspected.
- a sensor 39 allows the robot 11 to adapt its positioning in real time with respect to the weld 12, the latter being identified by its bead (additional thickness) materialized on the outer surface of the controlled structure 13.
- the laser sensor 39 is associated with a camera 40 oriented in the direction of the weld 12 so that the operator 16 can view it during the control operation.
- a second camera 41 in particular a High Definition (HD) camera, to allow an operator 16 to view the positioning of the ultrasound probes 15 and/or a environment in which the robot evolves 11 .
- HD High Definition
- the robot 11 may also include a sniffer 43 intended to take a sample of the atmosphere in an area close to the weld 12 to be checked and to route this sample to a gas detector (4 gases: 02, CO, H2S , and lower explosive limit (%LEL)) associated with the command station 17.
- a gas detector (4 gases: 02, CO, H2S , and lower explosive limit (%LEL)) associated with the command station 17. This makes it possible to prevent any risk when working in an explosive atmosphere.
- the robot 11 includes a connection interface 44 with data cables and power cables.
- the data cables make it possible to convey control data of the robot 11 coming from the control station 17, such as direction data (forward/backward/right/left) and data relating to the electrical measurement signals processed by the ultrasonic generator 25.
- the power cables make it possible to convey the electrical power necessary for the operation of the motors 24.1, 24.2 and the electronic circuits of the robot 11 .
- the command station 17 is in communication with the robot 11 via data cables and power cables.
- the command station 17 comprises a man-machine interface 46 taking for example the form of a computer and a source of energy 47 to supply the robot 11 with electrical energy via the power cables.
- the command station 17 also comprises a connection interface 48 with the data cables and the power cables, an electronic communication box 49, as well as an emergency stop button 50.
- the command station 17 can be installed inside a protective box 51 .
- a fluid pump 53 provides a coupling supply to the robot 11, in particular water. Pump 53 is intended to pump couplant from a couplant reserve (not shown) to robot 11 .
- the fluid inlet and outlet ducts can be connected to the pump 53 by quick connection fittings 54.
- the pump 53 can also be protected by a protective case 55.
- a magnetic take-off mat 56 shown in FIG. 1 facilitates the removal of the wheels of the robot 11 relative to the magnetic surface of the ferromagnetic structure 13.
- This mat 56 made mainly of a non-magnetic material is provided with fixing means 58 on the ferromagnetic structure 13, in particular magnets.
- fixing means 58 on the ferromagnetic structure 13, in particular magnets.
- This method includes a step 101 of powering of the command station 17 then a connection test step 102 with the robot 11 and operating test of the fluid pump 53.
- the operator 16 can then, in a step 103, position the robot 11 on the ferromagnetic structure 13.
- the method also comprises:
- the robot 11 can then inspect another weld 12 or be unhooked from the structure 13 using the magnetic take-off carpet 56 after returning to an area accessible by the operator 16.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2105391A FR3123441A1 (fr) | 2021-05-25 | 2021-05-25 | Robot piloté dedié à l'inspection de soudures par ultrasons |
| PCT/EP2022/060175 WO2022248122A1 (fr) | 2021-05-25 | 2022-04-15 | Robot piloté dédié à l'inspection de soudures par ultrasons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4348237A1 true EP4348237A1 (fr) | 2024-04-10 |
Family
ID=76730808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22723132.1A Pending EP4348237A1 (fr) | 2021-05-25 | 2022-04-15 | Robot piloté dédié à l'inspection de soudures par ultrasons |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4348237A1 (fr) |
| FR (1) | FR3123441A1 (fr) |
| WO (1) | WO2022248122A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITBS20070154A1 (it) * | 2007-10-11 | 2009-04-12 | Tecnomac Srl | Robot mobile ad ancoraggio magnetico |
| WO2015081135A1 (fr) * | 2013-11-30 | 2015-06-04 | Saudi Arabian Oil Company | Véhicule mobile d'inspection modulaire |
| US11673272B2 (en) * | 2016-12-23 | 2023-06-13 | Gecko Robotics, Inc. | Inspection robot with stability assist device |
| US10451222B2 (en) * | 2017-07-12 | 2019-10-22 | Saudi Arabian Oil Company | Magnetic crawler vehicle with passive rear-facing apparatus |
-
2021
- 2021-05-25 FR FR2105391A patent/FR3123441A1/fr active Pending
-
2022
- 2022-04-15 WO PCT/EP2022/060175 patent/WO2022248122A1/fr not_active Ceased
- 2022-04-15 EP EP22723132.1A patent/EP4348237A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022248122A1 (fr) | 2022-12-01 |
| FR3123441A1 (fr) | 2022-12-02 |
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