EP3463598B1 - Real-time monitoring device for learning a gliding sport - Google Patents

Description

Technical area

The present invention relates to the field of board sports more specifically to surfing and to its training.

State of the art

WO 2015/172178 A1 unveils a real-time device for helping learning a board sport such as surfing, comprising a set of sensors adapted to measure the position, speeds and accelerations of a surfboard in an associated Cartesian frame to the board, said set of sensors being connected to a unit for processing the measured data to determine a model of deterministic dynamic behavior of the surfboard. This device comprises at least one signaling means for delivering in real time information relating to the model of deterministic dynamic behavior of the board.

Learning and improving surfing involves training under the watchful eye of a coach. The latter will watch the surf practitioner evolve and, depending on the faults he observes, propose corrections to the surfer who will strive to have the correct attitude by a succession of trials / errors.

Usually, during a surf lesson, the trainer must, from the beach, send indications to the surfer on the behavior to be had, this in a gestural or sound way in order to guide the beginner surfer.

Generally speaking, for beginner surfers, the recovery phase (“take off”) is one of the most difficult phases to learn and master. This is the phase in which the surfer goes from a horizontal plane, during the paddling phase which is a launching phase, to a vertical plane when he enters the trough of a wave. It is therefore necessary to choose the optimal moment to perform the take-off. Currently this optimum moment is based on a subjective and random estimate of the speed of the board by the surfer and the trainer.

As part of a learning to surf lesson, it is very difficult for novice surfers to estimate this optimal time and they tend to get up too early or too late. The consequences of getting up too early or too late are sometimes a bad start to the wave, slowing the surfer's progress on the wave and in most cases a fall that can be dangerous. following a possible impact with the board.

The coach must therefore send a sound signal to the beginner surfer so that he gets up at the right time in order to guarantee the quality of the surf. Thus, as long as the recovery phase is not mastered by the surfer, it requires the intervention of the trainer who cannot then insist on other technical aspects of the teaching. This learning phase is often heavy, long, thankless and tedious.

Description of the invention

The objective of the present invention is therefore to facilitate this learning phase, so that the beginner surf practitioner can be autonomous very quickly to choose the optimal moment when he must stand up according to the position, the speeds and the accelerations. of the surfboard.

• un ensemble de capteurs adaptés pour mesurer la position, les vitesses et les accélérations d'une planche de surf dans un repère cartésien associé à la planche; ledit ensemble de capteurs étant relié à
• une unité de traitement des données mesurées pour déterminer un modèle de comportement dynamique déterministe de la planche de surf ;
• au moins un moyen de signalisation pour délivrer en temps réel, des informations relatives au modèle de comportement dynamique déterministe de la planche, au pratiquant et/ou à une personne externe.

To this end, the invention relates to a real-time device for assisting in the learning of a board sport such as surfing for a practitioner of such a sport comprising:

• a set of sensors suitable for measuring the position, speeds and accelerations of a surfboard in a Cartesian coordinate system associated with the board; said set of sensors being connected to
• a unit for processing the measured data to determine a model of deterministic dynamic behavior of the surfboard;
• at least one signaling means for delivering in real time, information relating to the deterministic dynamic behavior model of the board, to the user and / or to an external person.

According to the invention, the information relating to the behavior model relates to at least one action to be adopted by the practitioner, and relates to the optimum moment for the surf practitioner to start the recovery phase.

The beginner surfer can train without an instructor in particular for this phase of recovery, the learning of this phase becomes faster and the courses followed with a trainer are more optimized on the other techniques of this sliding sport.

• un signal sonore, remplaçant ainsi le signal émis par l'entraîneur ;
• un signal lumineux visible par le pratiquant et/ou une personne extérieure telle que l'entraîneur;
• un écran adapté pour afficher des informations relatives au comportement dynamique de la planche de surf et visibles par le pratiquant.

Advantageously, the signaling means comprise the following elements, which can be used alone or in combination:

• an audible signal, thus replacing the signal emitted by the trainer;
• a light signal visible by the practitioner and / or an external person such as the trainer;
• a screen adapted to display information relating to the dynamic behavior of the surfboard and visible to the practitioner.

Advantageously, the device comprises a data storage unit connected to all of the sensors and to the data processing unit.

• émettre le signal reçu par au moins un des moyens de signalisation vers une personne extérieure telle que l'entraîneur ;
• permettre d'accéder aux données stockées dans l'unité de stockage, permettant notamment de décharger les données enregistrées pour les analyser une fois l'entraînement terminé ;
• recevoir des informations envoyées par une personne extérieure, lesdites informations étant retransmises en temps réel au pratiquant par au moins un des moyens de signalisation.

Advantageously, the device also comprises means of communication which, according to options which can be used alone or in combination, are suitable for:

• transmitting the signal received by at least one of the signaling means to an outside person such as the trainer;
• allow access to the data stored in the storage unit, making it possible in particular to unload the recorded data for analysis once the training is finished;
• receive information sent by an outside person, said information being retransmitted in real time to the practitioner by at least one of the signaling means.

Advantageously, the device also includes an on-board camera suitable for filming the practitioner.

Advantageously, said camera is connected to communication means suitable for transmitting the images in real time to an external person.

Advantageously, said camera is also connected to the data storage unit suitable for recording and / or storing the images of the camera.

• une base destinée à être fixée à la planche de surf par des moyens de fixation, et
• une partie amovible vis-à-vis de la base, les deux parties coopérant ensemble pour former un ensemble étanche.

Advantageously, the device comprises two parts:

• a base intended to be fixed to the surfboard by fixing means, and
• a removable part vis-à-vis the base, the two parts cooperating together to form a sealed assembly.

The present invention also relates to a surfboard comprising a real-time learning aid device defined according to any one of the embodiments defined above.

Brief description of the figures

• La figure 1 représente un dispositif selon un mode de réalisation de l'invention fixé à une planche de surf ;
• La figure 2 représente une vague arrivant sur la planche de surf de la figure 1 ainsi qu'un référentiel associé à une planche de surf.
• La figure 3 représente une forme de réalisation du dispositif de la figure 1 comprenant une base fixe et une partie amovible.

The invention will be better understood on reading the following description of preferred embodiments given by way of illustrative, non-limiting examples, with reference to the drawings, among which:

• The figure 1 shows a device according to an embodiment of the invention attached to a surfboard;
• The figure 2 represents a wave arriving on the surfboard of the figure 1 as well as a repository associated with a surfboard.
• The figure 3 shows an embodiment of the device of the figure 1 comprising a fixed base and a removable part.

Embodiments

• un ensemble de capteurs 5 adaptés pour mesurer la position, les vitesses et les accélérations selon trois axes associés à une planche de surf, telle qu'une centrale inertielle regroupant un accéléromètre trois axes, un gyroscope trois axes ainsi qu'un magnétomètre ;
• une unité de traitement 7 des données mesurées adaptée pour déterminer un modèle de comportement dynamique déterministe de la planche de surf à partir des valeurs physiques mesurées par les capteurs ;
• au moins un moyen de signalisation 9 adapté pour délivrer en temps réel des informations relatives à un modèle de comportement au pratiquant et/ou à une personne externe.

Ce dispositif peut être réparti en plusieurs localisations de la planche. Notamment, tout ou partie du moyen de signalisation 9 peut être déporté par rapport à l'ensemble des capteurs 5 et à l'unité de traitement des données 7, et cela en étant logiquement connectés avec eux.With reference to the Figure 1 , and according to a first general embodiment of the invention, the real-time device 1 for assisting in the learning of a board sport such as surfing comprises:

• a set of sensors 5 suitable for measuring the position, the speeds and the accelerations along three axes associated with a surfboard, such as an inertial unit comprising a three-axis accelerometer, a three-axis gyroscope and a magnetometer;
• a measurement data processing unit 7 suitable for determining a model of deterministic dynamic behavior of the surfboard from the physical values measured by the sensors;
• at least one signaling means 9 suitable for delivering in real time information relating to a behavior model to the practitioner and / or to an external person.

This device can be divided into several locations on the board. In particular, all or part of the signaling means 9 can be deported by compared to all the sensors 5 and to the data processing unit 7, and this while being logically connected with them.

According to one embodiment of the invention, the set of sensors 5 comprises position and movement sensors which are intended to identify the interactions between the surfboard and the wave. It usually includes a 3-axis gyroscope, a 3-axis accelerometer, and a 3-axis magnetometer.

According to another embodiment, this set of sensors may include a GPS receiver or a GPS receiver combined with another sensor such as a 3D accelerometer. The use of a GPS receiver makes it possible to make the measurement of the position and the speed of the surfboard more precise and therefore to have a triggering of the signaling means more precise.

Device 1 therefore has nine degrees of freedom which make it possible to measure at any time the rotations of angles in X, Y and Z (see reference 20 given Figure 2 ) as well as the corresponding speeds and accelerations around which the board varies.

Thus, a surfer 22 who decides to take a wave 24 will row towards the shore and therefore according to a certain range of angles and angular speeds along the Z axis.

When the wave approaches and begins to pass under the board 3, the latter then leans according to a range of angles, speeds and angular accelerations along the Y axis.

Finally, the action of rowing also causes a rotation of the board 3 along the X axis.

The data processing unit 7 integrated in the device comprises a calculation algorithm which determines a model of deterministic dynamic behavior of the surfboard 3 from the physical values coming from the sensors 5.

This model of deterministic dynamic behavior of the surfboard 3 is predefined by a predictive model which takes into account the interaction between the rider 22 and the surfboard 3. This predictive model makes it possible to predict the behavior of the board 3 according to the behavior of the practitioner.

The information on the deterministic dynamic behavior model of the board is then sent to the practitioner 22, and / or to an external person via the signaling means 9.

The information relating to the deterministic dynamic behavior model concerns at least one action to be adopted by the practitioner.

According to one embodiment of the invention, this deterministic dynamic behavior model makes it possible to determine the optimum moment to start the recovery or take-off phase. Thus, the action of the surf practitioner consists in starting the take-off phase.

According to another embodiment of the invention, this behavior model makes it possible to determine a lack of support on the part of the practitioner, for example on the front of the board during the surfing phase. In this case, the action of the practitioner consists in modifying his support on the front of the board.

Advantageously, the signal emitted by the signaling means is specific to the nature of the information delivered to the practitioner and / or to the external person. For example, in the case of a light signal, a color code makes it possible to specify the nature of the information (examples: take-off, bad posture, etc.).

According to a first option, one of the signaling means is a sound signal which replaces the one which was originally emitted by the trainer present on the beach to give his indications.

• soit une action à réaliser par le pratiquant, comme amorcer le redressement,
• soit un comportement à corriger, comme la position du pratiquant sur la planche, un manque de vitesse, etc.,
• ou autre.

The associated sound (eg: whistle or beep, single or repeated, etc. or a voice message) designates:

• either an action to be carried out by the practitioner, such as initiating recovery,
• either a behavior to correct, such as the position of the practitioner on the board, a lack of speed, etc.,
• Or other.

According to a second option, the sound signal can be replaced or combined with a light signal, such as an LED. The repeated blinking, more or less long, or the color of it, etc. can then replace or accompany the sound signal synchronously or not.

Preferably, the device is mounted at the front of the board so that it is visible to the practitioner, at the same time as to the trainer.

In an embodiment which is even more efficient and compatible with the general mode, the signaling means comprise a screen suitable for displaying information visible to the practitioner, such as written messages or videos / diagrams indicating the actions to be carried out or the position of the user. the surfboard versus the wave, etc.

According to an option compatible with the previous embodiments, the device comprises a unit for storing data coming from the sensors 5 and from the data processing unit 7. This makes it possible to use these data at the end of the exercise.

• émettre le signal reçu par au moins un des moyens de signalisation vers une personne extérieure telle que l'entraîneur ;
• permettre d'accéder aux données stockées dans l'unité de stockage, permettant notamment de décharger les données enregistrées pour les analyser une fois l'entraînement terminé ;
• permettre à une personne extérieure d'envoyer des informations retransmisses en temps réel au pratiquant par au moins un des moyens de signalisation. Cela peut par exemple être sur l'écran du dispositif 1 du pratiquant, comme des indications pour améliorer la pratique du surfeur, les conditions climatiques ou autre, ou encore des messages sonores, ou un signal lumineux correspondant à la nature de l'information à faire passer (take off, mauvaise position, etc.).

According to another compatible option of this embodiment, the device comprises means of communication which, according to options which can be used alone or in combinations, are suitable for:

• transmitting the signal received by at least one of the signaling means to an outside person such as the trainer;
• allow access to the data stored in the storage unit, making it possible in particular to unload the recorded data for analysis once the training is finished;
• allow an outside person to send information retransmitted in real time to the practitioner by at least one of the signaling means. This may for example be on the screen of the practitioner's device 1, such as indications to improve the surfer's practice, the climatic conditions or the like, or even sound messages, or a light signal corresponding to the nature of the information to be pass (take off, bad position, etc.).

These means of communication can be wired like a USB socket on which the practitioner would connect once the training is finished to retrieve the data of his transfer.

These means of communication can also be wireless, Bluetooth type, to allow communication to be established between the practitioner and an external person, via messages displayed on the practitioner's screen, audio messages or a visual signal, during the session. training while the surfer is at sea and the coach on shore.

The device according to one of the embodiments described above can also include an on-board camera suitable for filming the practitioner.

• la caméra est reliée à l'unité de stockage adaptée pour enregistrer et stocker la vidéo prise du pratiquant pour que celui-ci puisse la visionner après sa séance d'entraînement et ainsi regarder les points à améliorer ;
• la caméra est reliée aux moyens de communication adaptés pour envoyer les images en temps réel à un écran pour qu'une personne externe puisse les visualiser, comme l'entraîneur présent sur la plage.

Depending on the options, can be used alone or in combination:

• the camera is connected to the storage unit suitable for recording and storing the video taken from the practitioner so that the latter can view it after his training session and thus look at the points to be improved;
• the camera is connected to the means of communication adapted to send the images in real time to a screen so that an external person can view them, such as the trainer present on the beach.

• une base 30 destinée à être fixée à la planche de surf par des moyens de fixation, et
• une partie amovible 32 vis-à-vis de la base.

Finally, as shown in Figure 3 , the device may comprise a case formed of two parts:

• a base 30 intended to be fixed to the surfboard by fixing means, and
• a removable part 32 vis-à-vis the base.

The base 30 and the removable part 32 cooperate together to form a sealed assembly.

According to one embodiment of the invention, the removable part is mounted on the base by simple interlocking and the assembly is sealed by any suitable means.

According to one embodiment of the invention, the removable part 32 comprises a first part and a second part, the two parts forming a housing in which all the electronic elements such as the sensors 5, the processing unit are received. 7, the signaling means 9, the storage unit, the communication means 11 and the battery supplying the system.

Preferably, at least one surface of the removable part is made of a transparent material to allow a light signal from the signaling means to pass.

The fact of being able to remove the main part 32 of the device makes it possible to facilitate the change of power supply or the recharging of the device, or to facilitate access to the data contained in the device such as the parameterization of the algorithms integrated in the control unit. processing, recorded video from the camera, etc.

The present invention also relates to a surfboard comprising a device as described above.

According to a first embodiment, the device 1 is fixed to an area of the surfboard 3 by fixing means such as an adhesive layer. By way of example, the suitable fixing means (not shown here in the figures) may be an adhesive tape.

According to another embodiment, the board comprises a housing in which the device is received so that the upper part of the device and the surface of the board substantially form a continuous surface.

Claims (13)

1. A real-time teaching aid device (1) for a board sport such as surfing for a person engaging in such a sport, comprising:

   - a set of sensors (5) adapted to measure the position, the speeds and the accelerations of a surf board (3) in a Cartesian coordinate system associated with the board, said set of sensors (5) being connected to

   - a measured data processing unit (7) for determining a deterministic dynamic behavior model of the surf board;

   - at least one signaling means (9) for providing, in real-time, information relating to the deterministic dynamic behavior model of the board to the person engaging in such a sport and/or to a third party,

   wherein the signaling means deliver information relating to the deterministic dynamic behavior model concerning at least one action to be undertaken by the surfer, and
   said at least one action to be undertaken by the surfer concerns the optimum time for the surfer to start the take off phase.
2. The device (1) as claimed in claim 1, wherein the signaling means (9) comprises a sound signal.
3. The device (1) as claimed in one of claims 1 to 2, wherein the signaling means (9) comprises a light signal visible by the surfer and/or a third party such as the trainer.
4. The device (1) as claimed in one of claims 1 to 3, wherein the signaling means (9) comprises a screen adapted to display information relating to the dynamic behavior of the surf board and which can be seen by the surfer.
5. The device (1) as claimed in one of claims 1 to 4, comprising moreover a data storage unit connected to the set of sensors (5) and to the data processing unit (7).
6. The device (1) as claimed in one of claims 1 to 5, comprising moreover communication means (11) adapted to transmit the signal received by at least one of the signaling means to a third party such as the trainer.
7. The device (1) as claimed in claim 6 where it is dependent on claim 5, wherein the communication means (11) are also adapted to allow access to the data stored in the storage unit.
8. The device (1) as claimed in claim 6 or 7, wherein the communication means (11) are adapted to receive information sent by a third party, said information being retransmitted in real time to the surfer by at least one of the signaling means.
9. The device (1) as claimed in one of claims 1 to 8, comprising moreover an on-board camera adapted to film the surfer.
10. The device (1) as claimed in claim 9 where it is dependent on one of claims 6 to 8, wherein said camera is connected to the communication means (11) adapted to transmit the images in real time to a third party.
11. The device (1) as claimed in claim 10 here it is dependent on claim 5 or 7, wherein said camera is connected to the data storage unit adapted to record and/or store the images from the camera.
12. The device (1) as claimed in one of claims 1 to 11, said device comprising a casing formed of two parts:

    - a base (30) intended to be fixed to the surf board by fixing means, and

    - a part (32) which can be detached from the base, the two parts cooperating together in order to form a watertight assembly.
13. A surf board comprising a real time teaching aid device (1) defined according to any one of claims 1 to 12.

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