EP2943256A1 - Système d'enregistrement d'une pluralité de vitesses de rotation d'une pluralité de segments pour la restitution d'un geste - Google Patents
Système d'enregistrement d'une pluralité de vitesses de rotation d'une pluralité de segments pour la restitution d'un gesteInfo
- Publication number
- EP2943256A1 EP2943256A1 EP14703113.2A EP14703113A EP2943256A1 EP 2943256 A1 EP2943256 A1 EP 2943256A1 EP 14703113 A EP14703113 A EP 14703113A EP 2943256 A1 EP2943256 A1 EP 2943256A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- swing
- segments
- data
- hand
- sensors
- 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- Withdrawn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
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- 210000000038 chest Anatomy 0.000 claims abstract description 23
- 210000004197 pelvis Anatomy 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 7
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Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B19/00—Teaching not covered by other main groups of this subclass
- G09B19/003—Repetitive work cycles; Sequence of movements
- G09B19/0038—Sports
Definitions
- the present invention relates to a system for automatically recording and analyzing a plurality of rotational speeds of a plurality of segments of the human body cleverly chosen for the restitution of a gesture, for its control, its optimization and its eventual correction, for example to analyze and optimize the effectiveness of a "swing" performed by a golfer.
- This system can be easily adapted to other types of sports using a swinging motion
- segments advantageously chosen which are at least four in number and preferably the pelvis, the thorax, the arm and the hand, last segment solidary of the club.
- AMM Technologies also proposes, for the recording and the analysis of a point or segment of measurement, a wireless inertial sensor, the AmmSensor, with 9 degrees of freedom, combination of an accelerometer, a gyroscope and of a magnetometer.
- a wireless inertial sensor the AmmSensor
- the AmmSensor with 9 degrees of freedom, combination of an accelerometer, a gyroscope and of a magnetometer.
- At least four sensors are necessary to record the movements and speeds of the at least four segments. useful for effective analysis.
- Such a system therefore has serious drawbacks, the main ones being the price, at least four sensors being indeed necessary but also on the one hand, the weight of the sensor when the latter is dedicated to measurements of the "hand" segment, this weight disturbing, authentically recognized, the gesture of the player and secondly, the means of securing said sensor to said segment.
- K-Vest has developed a product intended for the analysis of three segments, hips, shoulders and hand using a wireless sensor system which involves, for each sensor, its own power supply and a transmitter radio which necessarily increases the volume and weight of the system and each sensor and in particular, in a real penalizing way, the sensor "hand".
- This product besides the fact that it is also expensive and significantly heavy, can not therefore make it possible to carry out a set of measures of sufficient quality for a correct analysis and synchronization according to the proven demonstration of Phil Cheetham which requires at least four points of measure well determined.
- the present invention aims to propose an efficient solution to various problems and disadvantages presented by the various systems and devices of the prior art.
- the present application relates to a system advantageously simpler, compact and reduced weight although as effective as those of Phil Cheetham and AMM Technologies and very significantly less expensive.
- the sensors and thus the hand-held sensor weigh less than 2 grams compared to 42 to 60 grams of the other existing systems of the prior art.
- This very significant lightness has the decisive advantage in our application of a non-interference with the movement of the swing and therefore the golfer.
- This weight also very much less than the weight of the glove which is of the order of 30 grams, therefore prohibits distorting the quality of the swing.
- this system is of the order of the price of the simplified systems, being interesting only to the main (or club) segment, described above, but proposes recordings relative to four segments thus making it possible to obtain results. system level analysis and corrections proposed by Phil Cheetham and AMM Technologies.
- the automatic recording and analysis system of a plurality of rotational speeds of a plurality of segments of the human body consists of:
- an acquisition and transmission device to be arranged on the pool segment, comprising a power supply module, a transmitter module using a wireless link protocol, a microprocessor coupled to a multiplexing switching module; different acquired signals as well as a first low-weight motion sensor dedicated to a measurement specific to the movements of the pelvic segment, the assembly being connected in a wire-like manner to three other low-weight motion sensors.
- a device for receiving, processing and displaying the data acquired by the sensors and transmitted which, either displays the speeds of rotating said segments in the form of curves, or analyzing and processing said data and displays the results of the data thus processed in the form of summary tables.
- the recording system which records only the useful parameters is obviously much simpler and consequently much less cumbersome, cumbersome and expensive than the sophisticated devices proposed by Phil Cheetham and AMM Technologies. but allows for high quality results as organized to capture and achieve relevant and optimized measurements by means of four sensors.
- This system is, in fact, compact and of reduced weight, the largest part, although of reduced size and weight, of the acquisition and transmission device approximately the size of a package of cigarettes and a weight of the order of 100g being disposed on the segment basin, which does not interfere with the movements of the golfer, while each of the sensors, deported from the central unit of the acquisition device and transmission and connected to this central unit wired, weighs only about 2g and thus the weight of the sensor disposed on the hand does not affect the gesture of the golfer.
- the low weight and size of the sensor of the hand allow to fix the latter by means of a buckle system and hook by solidarisant golf glove. According to this characteristic, the golfer is neither disturbed nor affected by the presence of said sensor, which was not the case with the other existing systems of the prior art.
- the system according to the invention actually stores three rotational speed values per segment (a value for each of the orthogonal axes of each of the sensors) and calculates the resulting module. This characteristic subsequently called rotational speed of the segment under consideration is used to obtain a finer analysis of the behavior of the hand sensor.
- the device for processing and displaying the data transmitted by the sensors is also simple and is preferably and advantageously in the form of a tablet digital or a simple PC that analyzes and processes the data received and displays the results of the data thus effectively processed by means of dedicated software.
- the system performs an automatic processing totally regardless of the player's interpretation. Such processing thus allows the player to know if he has moved in the right order the various parts of his body as well as the recorded time difference from the optimal sequence. In the display mode of the curve, the player will also be able to access the pelvic and thorax angle curves. This latest information will allow him to easily and effectively correct his swing gesture and check these angles at the moment of the keystroke.
- the wireless link protocol used will preferably be the protocol according to the Bluetooth standard.
- the system according to the invention is completely autonomous because, moreover, it exploits a system of swing detection algorithms consisting of a first filtering algorithm executed within the acquisition and transmission device, allowing to prohibit the transmission of data generated during untimely movements of the club and a second algorithm executed within the device for receiving, processing and displaying data which analyzes in detail the signals transmitted by the acquisition device and of transmission and rejects all signals that do not have a gesture profile corresponding to a swing.
- a system of swing detection algorithms consisting of a first filtering algorithm executed within the acquisition and transmission device, allowing to prohibit the transmission of data generated during untimely movements of the club and a second algorithm executed within the device for receiving, processing and displaying data which analyzes in detail the signals transmitted by the acquisition device and of transmission and rejects all signals that do not have a gesture profile corresponding to a swing.
- This system of algorithms constituted by all these two algorithms thus makes it possible to effectively reject the false movements to record only the true movements corresponding to a swing profile.
- This system with two levels of algorithms thus advantageously makes it possible to reduce the calculation load of the microprocessor of the acquisition and transmission device and not to affect the sampling frequency while also avoiding transmitting unnecessary data to the reception device. , processing and displaying data.
- the levels of the filtering thresholds have been optimized so that the player can perform his "waggle" movements without triggering a recording. This system does not require any prior calibration or alignment.
- the device for receiving, processing and displaying the data transmitted by the sensors allows the easy replay of a previously saved record for a detailed analysis, this replay can be done with or without video.
- this record includes a file name, the file name including among others, to facilitate the subsequent search for a detailed analysis, a coded part relating to the quality of the swing on the two main parameters of the kinematic sequence that are, on the one hand the speeds of rotation and on the other hand, the peaks of speeds of rotation of the different segments.
- FIG. 1 represents a graph showing the rotational speeds (v) as a function of time (t) of the four relevant segments when performing a correct swing movement, as well as the angles of the pelvis and the thorax as a function of the time (t).
- Fig. 2 is a block diagram of the rotational speed recording system according to the invention.
- Figure 3 shows a complete CCA acquisition cycle of data coming in sequence from the four sensors.
- FIG. 5 represents a graph showing the curves of the speeds of rotation (v) as a function of time (t) along the three orthogonal axes of the hand sensor as well as the resultant curve (modulus) of the rotational speed of the hand .
- Figure 6 shows the installation of the hand sensor between the two "loop and hook” fabrics used to attach the glove to the player's hand.
- FIG. 1 represents a graph showing the rotational speeds (v) as a function of time (t) of the four relevant segments when performing a correct swing movement, as well as the angles of the pelvis and the thorax as a function of the time (t).
- Figure 1 reproduces a graph taking up the known principle and published according to Phil Cheetham of the measurement of rotational speeds of four segments judiciously chosen for an efficient analysis of the swing gesture.
- this graph which corresponds to a swing gesture performed correctly, four curves appear, one per relevant segment, the first dashed curve 1 relates to the measurement of the rotational speed of the basin segment, the second in fine line 2 concerns the measurement of the speed specific to the thorax segment, the third in dotted line 3 relates to the measurement of the speed specific to the arm segment and finally the fourth in bold line 4 relates to the measurement of the speed specific to the hand segment (or club).
- the reception, processing and display device uses, in addition, a top swing detection algorithm (see Fig. 1, T4) and club / ball impact (see Fig.l, 11) for calculating the duration of the swing as well as the rise time on descent time ratio, which makes it possible to measure the regularity of the swing tempo.
- a top swing detection algorithm see Fig. 1, T4
- club / ball impact see Fig.l, 11
- FIG. 1 three phases are highlighted, a first phase 5 which corresponds to the club's rise time whose origin is T0, a second phase 6 which corresponds to the club's descent time and a third phase 7 which starts.
- the receiving, processing and display device calculates and displays the pelvic and thorax angles as a function of time (Fig. 1, curves 13 and 14) relative to the starting position of the swing.
- the y-axis (angles from -90 ° to + 90 °) is on the right side of the graph.
- FIG. 2 is shown a block diagram of the rotational speed recording system 12 according to the invention.
- the system 12 consists of an acquisition and transmission device 120 and a device for receiving, processing and displaying data 130.
- the acquisition and transmission device 120 comprises an electronic unit 121 advantageously disposed on the basin segment, this housing is further equipped with an on / off switch and LEDs not shown in the figure because known per se, preferably at least one LED, for example, green which provides two indications: " on / off "and” data transmission "and at least one LED, for example, orange indication” remote connection ".
- This electronic unit 121 houses a power supply module 122, a transmitter module 123 using a wireless link protocol, a microprocessor 124 also coupled to a switching module 125.
- the wireless link protocol used will preferably be the protocol according to the invention. Bluetooth standard.
- a first orthogonal three-axis transducer 126 dedicated to a measurement specific to the movements of the pelvic segment is also contained in the electronic control unit 121.
- the control unit 121 is wiredly connected to three other three-axis sensors, 127, 128 and 129 respectively. arrange respectively on the thorax, arm and hand segments.
- the sensors are preferably and for simplicity elaborated each around a gyroscope, for example in MEMS technology (Micro Electro-Mechanical System) however they could just as well consist of a combination of gyroscopes associated with accelerometers or magnetometers, or a combination of gyroscopes, accelerometers and magnetometers.
- the power supply module 122 accommodates batteries or accumulators, which supply it with input a voltage of, for example, 1 to 4.5V, the module 122 providing a continuous output 5V feeding the input of the microprocessor 124, for example an iOS Nano board.
- the microprocessor 124 provides a 3.3V output which allows to feed on the one hand, the transmitter module 123, for example a Bluetooth module BTM-182 with a range of about 3 meters and secondly the four sensors 126, 127, 128 and 129, for example sensors of the ITG 3205 type.
- the gyroscopes of the selected sensors have a dynamic range of +/- 2000 ° / s and per axis, given that the sensor is a three-axis sensor.
- the microprocessor 124 has a reset pin RST. It also has an TX data transmission pin connected to the data receiving pin RX of the transmitter module 123, and the data receiving pin RX of 124 is connected to the TX data transmission pin of the module 123.
- microprocessor 124 is connected to the switching module 125 composed, in known manner, of an electronic card mainly comprising switching transistors for multiplexing the signals acquired by the four sensors.
- the pins of the microprocessor 124 SDA input / output of the data signal, D3, D4, D5 and D6 data specific to the four sensors 126, 127, 128 and 129, the switching being done in sequence with respect to the four sensors and at the rate of the clock delivered by the microprocessor 124 on its clock signal input / output pin SCL.
- FIG. 3 shows a complete cycle of CCA acquisition of data coming in sequence from the four sensors 126, 127, 128 and 129, knowing that a complete recording preferably has 380 cycles.
- the switching module 125 authorizes in sequence, during a CCA cycle, the data transmission during the period TD126 coming from the sensor 126 placed on the basin segment, then the sensor 127 placed on the thorax segment during the period TD127, then the sensor 128 placed on the arm segment during the period TD128 and finally the sensor 129 placed on the hand segment during the period TD129.
- the first sensor dedicated to the pool segment is integrated into the control unit 121 and the housing is placed at the level of the pool at the rear of a belt attached to the pool. cut.
- the second sensor dedicated to the thoracic segment wired to the housing 121 is placed at the thorax at the vertex of the vertebral column between the two shoulder blades.
- the sensor is held by means of a light and flexible "V" -shaped strap, secured to both ends of the belt and passed on both sides of the neck.
- the third sensor dedicated to the arm segment, wired to the chest segment sensor is placed midway between the shoulder and the elbow and maintained by means of a simple cuff.
- the fourth sensor dedicated to the hand segment, connected in a wired manner to the arm segment sensor is preferably placed in the glove which keeps it thus in position without discomfort and without risk of loss during the realization of the movement.
- this fourth sensor may be coated with two small pieces of "velcro" type of the size of said sensor the first glued on the bottom and the second glued on it. This sensor will thus be effectively held between the two parts of the closure of the glove, gripping and adhering to "Velcro" already present on said glove and which ensure its closure.
- the data processing and display device 130 receives, via the transmitter module 123, the data transmitted by the sensors that it analyzes and then processes and displays the results of the data thus processed.
- the data processing and display device 130 is preferably constituted by a digital tablet which analyzes and processes the data transmitted by the sensors and displays the results of the data thus processed by means of dedicated software.
- the device 130 may consist of a computer of the PC type in which the same dedicated software is installed.
- two data processing and display devices have been chosen and developed.
- the first was developed around an Android tablet for example of the Archos IT type with a type of operating system Froyo or higher.
- the second was conceived around a PC with a Windows operating system and a development environment of the Visual Basic type.
- the acquisition and transmission device can interface with different terminals with a Bluetooth capability.
- the dedicated software is preferably, "Golf Swing
- the system 12 stores the data relating to the rotational speeds of the different segments making it possible to construct the graph of FIG. 1 with the curves specific to the measurements of the different segments. It analyzes this data and displays, on the screen of the data processing and display device 130, in the form of the tables represented in FIGS. 4a and 4b, the synthetic results of this analysis of the measurements. These analyzes are done deterministically without any intervention or interpretation on the part of the player.
- the reception, processing and display device (130) performs an automatic analysis of the quality of the swing relative to criteria recognized in the sport of golf.
- the tables of FIG. 4a show an example of results, appearing on the screen of the device 130, of the analysis made by the system of a correctly performed swing.
- this screen shows that the correct kinematic sequence is preserved as well concerning the chronology of the swing descent (left side): basin, thorax, arm then hand that concerning the chronology of the peaks of rotation speeds during the downhill phase of the club (right side, same correct chronology).
- the numbers shown (0, 30, 36, 43) represent the time elapsed between the beginning of the movement of the basin segment, which is chosen as a time reference and the beginning of the respective movement of the other segments.
- FIG. 4b show an example of results, displayed on the screen of the device 130, of an analysis made by the system of a swing not correctly carried out.
- this screen shows that the correct kinematic sequence is not preserved as well concerning the chronology of the swing descent start (left side): thorax and pelvis inversion, then correct chronology, arm and finally hand, that concerning the chronology of the peaks of rotation speeds during the descent phase of the club (right side, correct chronology concerning the pelvis then the thorax, but inversion of the hand and the arm).
- the maximum speeds reached by the segments can also be obtained, these measurements corresponding to the values of the speed peaks reached at the times referenced on the time axis of FIG. 1: ⁇ 8 ', ⁇ 9', ⁇ 10 ', ⁇ 11 ', knowing that the measurement of the speed reached at the moment of impact at time ⁇ 11' can be disturbed by said impact. Also, can be calculated, the duration of a swing: ⁇ 11'- ⁇ 4, the ratio between the rise time of the swing and the descent time of the swing: (T4-T0) / ('11'- ⁇ 4), which allows to check the tempo of the swing.
- the memorization of the main characteristics of a set of swings makes it possible to capitalize said measurements and to replay them to analyze effectively the evolution of the performances of a golfer. Also, a fine and detailed analysis of the data provided by the sensors which measure along three orthogonal axes can be carried out, this analysis making it possible, for example, to determine the arming / disarming sequence of the wrist, to observe and check the modifications of the plane of the wrist. swing between the ascent and descent or to determine the outline of the pelvis and thorax angles.
- the two LEDs green: “on / off” and “data transmission” and orange: “connection to distance ", will start flashing while the case is kept motionless.
- the amber LED continues to flash showing that the remote connection is established and the green LED is stable, which turns off when the hand segment sensor is moved during data transmission.
- the device 120 can then be placed on the golfer.
- the home screen of the device 130 proposes two possible menus entitled “New registration”, a menu that makes it possible to start a new acquisition and to make new registrations. and on the other hand "Archive Analysis”, a menu that allows replaying archived previous recordings.
- the archive selection screen displays a file selection window containing the previous records, files listed with user names, dates and times of recording as well as coded indications as to the correction. or not the gesture made. Once the selection is made, this selection must be confirmed.
- the home screen also offers some possible options, such as the choice of the language, the "Demo" mode, which allows one hand to demonstrate the operation of the system without making a swing and secondly to see the curves of the sensors by invalidating the use of the swing detection filtering algorithm, or even the "Curves directly” mode, which makes it possible to display only the curves without an analysis page.
- the "Demo" mode which allows one hand to demonstrate the operation of the system without making a swing and secondly to see the curves of the sensors by invalidating the use of the swing detection filtering algorithm
- the "Curves directly” mode which makes it possible to display only the curves without an analysis page.
- the swing detection filtering algorithm is active as soon as the hand segment sensor is moving above a certain speed threshold and the device 120 transmits real time data to the device 130.
- the pre-threshold data which represents the beginning of the swing having been continuously recorded in the memory of the microprocessor 124 will be transmitted to the device 130 by the device 120 after the "real time" data has been read. been transmitted.
- the data will be handed over in the correct chronology by the device 130.
- the analysis software of the device 130 only takes into account data that has the "profile" of a swing, which are then recorded with the name of the device. user to specify and the analysis window can be refreshed.
- the system is autonomous, the basic screen being the analysis screen, the golfer can therefore concentrate and perform his swing without embarrassment when he wants, while the system automatically analyzes the data after every swing.
- the visualization of the curves can be done either automatically if the box "curves directly" is checked in the main menu, or from the analysis screen by pressing "graphics". This gives access to the general graph presenting all the curves, including the curves representative of the angles of the pelvis (Fig. 1, curve 14) and thorax (Fig. 1, curve 13) segments if they are desired. , a long click on a curve and a zoom of the transition zone "up / down swing” is obtained, a long click to return to the general curve while a short click on one of the curves can return to the screen of analysis.
- the files are saved in a directory called
- the analysis screen shows on its right side, as shown in FIG. 4, a first column of values, in milliseconds, specific to the timeline of the swing descent leader for the various segments and at least one second column. of values, in milliseconds also, specific to the chronology of the peaks of speed of rotation during the phase of descent of the club for the various segments.
- a third column may also optionally be displayed, which relates to the rotational speeds for each segment, in degree / second. Under these columns, you can also optionally display the duration of a swing in milliseconds and the ratio between the rise time and the descent time of a swing.
- a replay of a recording in Excel and making, in addition to the curves, appear a video is also possible.
- the video is then read image by image synchronously with the scrolling of the vertical line of time along the curves described.
- FIG. 5 shows a graph showing the curves (101, 102, 103) of the rotational speeds (v) as a function of time (t) along the three orthogonal axes of the hand sensor as well as the resulting curve (module) of the rotation speed of the hand.
- the discontinuity (108) of the curve (4) makes it possible to determine the extent of the change of the plane of the swing between the rise and the descent of the club. Another important indication is given by the observation of the curve (101) and especially the change of slope at time T5.
- the moment T5 is the moment when the player begins to disarm the wrist.
- FIG. 6 shows the installation of the hand sensor between the two "loop and hook” fabrics which serve to fix the glove on the player's hand, the sensor (129) placed on the hand segment is thus held in the glove between the two elements of loop and hook allowing the closure of the glove by means of a loop and hook system.
- the sensor once held in place and secured to the glove then makes it possible to record very precisely the rotational speeds along the 3 orthogonal axes (109, 110, 111) of the sensor 129 of the hand.
- the gyroscopic sensor of the hand segment could be replaced by a sensor derived from a combination of a gyroscope associated with an accelerometer, or even a combination of a gyroscope, an accelerometer and a magnetometer.
- a sensor would further sophistise the analysis of the movement of the hand segment by allowing access to the plane of the swing and the corners of the club face.
- a complementary function could be easily added to keep track of the statistics of the various golfers regarding the relationship between the rise time and the descent time of a swing, the table of swing descent start timelines and peaks. speed of rotation during the descent phase of the club, the maximum speeds, etc.
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Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1350144A FR3000682B1 (fr) | 2013-01-08 | 2013-01-08 | Systeme d'enregistrement d'une pluralite de vitesses de rotation d'une pluralite de segments pour la restitution d'un geste |
PCT/FR2014/050021 WO2014108633A1 (fr) | 2013-01-08 | 2014-01-08 | Système d'enregistrement d'une pluralité de vitesses de rotation d'une pluralité de segments pour la restitution d'un geste |
Publications (1)
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EP2943256A1 true EP2943256A1 (fr) | 2015-11-18 |
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EP14703113.2A Withdrawn EP2943256A1 (fr) | 2013-01-08 | 2014-01-08 | Système d'enregistrement d'une pluralité de vitesses de rotation d'une pluralité de segments pour la restitution d'un geste |
Country Status (3)
Country | Link |
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EP (1) | EP2943256A1 (fr) |
FR (1) | FR3000682B1 (fr) |
WO (1) | WO2014108633A1 (fr) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001000614A (ja) * | 1999-06-21 | 2001-01-09 | Ritsumeikan | スイング解析方法及びその装置 |
US20100201512A1 (en) * | 2006-01-09 | 2010-08-12 | Harold Dan Stirling | Apparatus, systems, and methods for evaluating body movements |
JP5182708B2 (ja) * | 2009-06-17 | 2013-04-17 | ダンロップスポーツ株式会社 | ゴルフスイングの分析方法 |
-
2013
- 2013-01-08 FR FR1350144A patent/FR3000682B1/fr active Active
-
2014
- 2014-01-08 WO PCT/FR2014/050021 patent/WO2014108633A1/fr active Application Filing
- 2014-01-08 EP EP14703113.2A patent/EP2943256A1/fr not_active Withdrawn
Non-Patent Citations (2)
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See also references of WO2014108633A1 * |
Also Published As
Publication number | Publication date |
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FR3000682B1 (fr) | 2016-11-04 |
FR3000682A1 (fr) | 2014-07-11 |
WO2014108633A1 (fr) | 2014-07-17 |
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