FR3007662A1 - METHOD FOR DETERMINING AT LEAST ONE CHARACTERISTIC OF A MOUNT / RIDER COUPLE - Google Patents

Abstract

The object of the invention is a method of determining at least one characteristic of a pair of mount / jumper, characterized in that it consists in determining the displacements of a point linked to the frame (10), the moving a point linked to the jumper (12), generating a signature (20) by synchronously coupling the movements of a point linked to the jumper (12) and the movements of a point linked to the frame (10) and determining at least one characteristic of the mount / jumper torque from at least one characteristic of the signature (20).

Description

The present invention relates to a method for determining at least one characteristic of a pair of mount / jumper. With over 500,000 licensees, horse riding is one of the most popular sports in France. Riding alone has about twenty disciplines, among these many disciplines, the endurance race is one of the most demanding, both for the rider and the mount. This discipline brings together two different biological species, the human being and the equine, and asks to travel long distances over periods that vary from 2 to 9 hours. Some events, raids, can take place over 2 to 3 10 days. In this context, the endurance competitions are particularly intense for the animal, because of the variability of the courses and the large portions of gallop. In order to reduce the risk of bodily injury, physiological injury or even death, race rules provide for veterinary checks before, during and at the end of each race. This allows the veterinary team to monitor the health of the horse and the slightest doubt, to eliminate horse-rider couples victims of signs of physical fatigue and / or physiological too important. It is worth remembering that the tests are for horses only. Throughout the test, the effort of the animal must be controlled. Thus, the success of this type of test would depend in part on the ability of the rider to follow the evolution of the fatigue of his horse, and its ability to respond optimally throughout the event.

In parallel, horse riding biomechanical studies were conducted on the description of the locomotion of the horse and the causes of its variability. Thus, there is known a method of monitoring the movement of the members of a body, human or horse, described in European Application No. EP2378969.

This method proposes to analyze the movements of two members of the same body, placing on each of them at least one sensor, and thus determine the relative phase of the movements of the limbs and to assess the pace. This type of process is relatively complex. In addition, the simple analysis of the movement of the animal's limbs and the determination of its pace are not sufficient to determine the state of fatigue of the animal. We note that the behavior of the rider has a significant role on this state. Also, the present invention provides a solution for determining at least one characteristic of a mount / jumper torque in order to improve in particular the biomechanical performance of the mount / jumper torque or to obtain a better analysis of the interaction between the jumper and his mount. For this purpose, the subject of the invention is a method for determining at least one characteristic of a pair of mount / rider, characterized in that it consists in determining concomitantly the displacements of a point linked to the frame, the 20 movements of a point related to the jumper, to generate a signature by synchronously coupling the movements of a point related to the jumper and the movements of a point related to the frame and to determine at least one characteristic of the torque mount / jumper from at least one characteristic of the signature. Other features and advantages will emerge from the following description of the device of the invention, a description given by way of example only, with reference to the appended drawings, in which - FIG. 1 is a diagram illustrating a device for implementing implementing a method for determining at least one characteristic of a pair of mount / jumper, - Figure 2A is a curve illustrating the displacement as a function of time of a point related to the frame, - Figure 2B is a curve illustrating the displacement as a function of time of a point related to the jumper, - Figure 2C is a curve corresponding to the sum of the values of the two curves illustrated in Figures 2A and 2B as a function of time, - Figures 3A to 31) are curves obtained by combining the movements of a point related to the rider according to the movements of a point linked to the frame respectively according to four combinations according to the pace of the frame and the technique of the Figure 4A is a part of a curve obtained by combining the movements of a point related to the rider as a function of the displacements of a mount-related point which illustrates a characteristic of the mount / rider coupling, and FIG. 4B is a part of a curve obtained by combining the movements of a point related to the jumper as a function of the movements of a mount-related point which illustrates a characteristic of another mount / jumper coupling. In Figure 1, there is shown a horse 10 and a jumper 12. Although described applied to a horse, the invention can be applied to different frames or a simulator. For the rest of the description, vertical direction means the direction 25 along the dorso-ventral axis of the horse. According to an embodiment illustrated in FIG. 1, the device for determining at least one characteristic of the pair of mount / jumper comprises a first sensor 14 of the accelerometer type fixed on the jumper 12 and a second sensor 16 of the accelerometer type fixed on the horse. In a preferred manner, the first sensor 14 is fixed rigidly with the aid of a neoprene belt. It is placed in the back at the level of the kidneys of the rider. In a preferred manner, the second sensor 16 is fixed on a belt under the ventral part of the sternum of the animal. This configuration makes it possible to record the accelerations of the displacements according to the vertical axis, of the horse and the jumper. By calculation, motions are determined from the accelerations in the vertical direction for example by a double integration. However, the invention is not limited to this configuration, nor to this type of sensor. in any case, the first sensor 14 must be able to record the movements of a point related to the jumper as a function of time over stride cycles, as illustrated for example in FIG. 2B. In parallel, the second sensor 16 must make it possible to record the movements of a point related to the horse as a function of time over stride cycles, as illustrated for example in FIG. 2A. Records of the movements of the point related to the rider and the point related to the horse are preferably performed concomitantly. The device comprises, in addition to the sensors 14 and 16, a unit 18 which synchronously couples the movements of a point linked to the rider according to the movements of a point linked to the horse so as to generate a signature. By signature, we mean a Lissajous type curve which synchronously couples the movements of a point related to the rider according to the movements of a point linked to the horse or the movements of a point linked to the horse according to the movements of a point related to the rider. Note that for the same horse / rider pair, the same pace and the same riding technique, the signature 20 corresponds to an average of Lissajous type curves, each Lissajous type curve corresponds to a cycle of strides. Depending on the case, this unit 18 can be reported on the horse, the rider or be distant from the horse and rider. in the latter case, the signals of the sensors 14 and 16 are transmitted to the unit 18 via a non-wire link. By way of example, the unit 18 may be a microprocessor with means for computing and storing information. The unit 18 advantageously comprises means for filtering the signals generated by the sensors. It may also include means for transmitting signals so as to transfer information to a remote point. According to a feature of the invention, the method comprises a step of determining at least one characteristic of the mount / jumper torque from at least one characteristic of the signature. Thus, the device comprises means for analyzing at least one characteristic of the signature 20. Thus, these characteristics of the signature make it possible to determine the characteristics of the pair of mount / jumper, namely at least one characteristic related to the frame, at least one characteristic related to the rider and / or at least one characteristic related to the horseshoe coupling, such as the horse's appearance and symmetry, the rider riding technique, the horse / rider synchronization. The signature 20 establishes the profile between the vertical movements of the horse and the rider during the strides. A first characteristic of a signature 20 is its inclination which reflects the riding technique of the rider 12. For the same horse / rider pair and the same pace, the so-called "seat" riding technique corresponds to a signature 20.1 (see FIG. 3A ) which has an inclination greater than the signature 20.2 (see Figure 3B) corresponding to the so-called "two points" riding technique.

The so-called "two points" riding technique corresponds to a riding technique during which the rider is no longer seated but in balance and resting on the two stirrups. According to one embodiment, the inclination corresponds to the angle a formed by a line b, the signature being superimposed on the line b during a coordination perfectly in phase. As illustrated in FIG. 4, there are discrepancies between the signature 20 and the straight line b corresponding to an amplitude difference between the movements of the rider and the horse and / or a temporal phase shift between the movements of the rider and the horse.

The line b is determined as a function of the curve C1 representing the evolution in time of the displacements, according to the vertical, of a point linked to the horse and of the curve C2 representing evolution in time of the displacements, according to the vertical , a point related to the jumper and the curve CT which represents the sum of the values of the curves C1 and C2.

This CT curve allows us to determine the maximum and minimum displacement values, respectively at times Tmax and Tmin. The report on the curves C1 and C2 of the times Tmax and Tmin makes it possible to identify the movement of the horse (on C1) in the value of A to T = Tmax and B to T = Tmin, as well as the identification of the rider's movement. (on C2) in the value of A 'to T = Tmax and B' to T = Tmin. On the signature, as illustrated in FIG. 1, the line b passes through the point having the coordinates (A, A ') and the point having the coordinates (B, B'). The angle a for the so-called "two point" riding technique is less than the angle a for the seated riding technique.

Generally, for the "sitting" riding technique, the angle a is greater than 45 °. preferably, it is around 55 °. For the so-called "two points" riding technique, the angle a is less than or equal to 45 °.

In FIGS. 3A to 31), different signatures 20.1 to 20.4 are shown, the signature 20.1 corresponding to the gallop look and the "sitting" riding technique, the signature 20.2 corresponding to the gallop and the so-called "Two points", the signature 20.3 corresponding to the trotting pace and the technique of riding adapted for the trot removed and the signature 20.4 corresponding to the trot and the so-called "two points" riding technique. Note even if this is not visible in Figure 31) that the signature 20.4 comprises two loops substantially superimposed. A second characteristic of a signature is its shape that includes a loop or several loops. A curve with a single loop does not include any point of intersection. In contrast, a curve with at least two loops comprises at least one point of intersection. The shape of the buckle makes it possible to identify the pace of the horse. The trot corresponds to a curve with at least two loops. The gallop corresponds to a curve with a single loop. The different gaits of the horse interfering directly with the period of dorso-ventral oscillations of the horse, the frequency of movement indicates whether the horse is trotting or galloping. For example, two oscillations repeated by stride for the trot, against one for the gallop. A third characteristic of a signature is given by the spacing of the points of tangency, especially in the lower part of the signature. As illustrated in FIG. 4A, in the lower part of the signature 20, there are two points of tangency, a first point of tangency 22 whose tangent is parallel to the abscissa axis (and corresponds to the low point of the jumper) and a second point of tangency 24 whose tangent is parallel to the ordinate axis (and corresponds to the bottom of the horse).

In the upper part of the signature 20, there are two points of tangency, a first point of tangency whose tangent is parallel to the abscissa axis (and corresponds to the high point of the jumper) and a second point of tangency whose tangent is parallel to the y-axis (and corresponds to the top of the horse).

The offset between the two points of tangency 22 and 24 indicates the phase shift in time between the horse and the rider. Figure 4A indicates that the rider is behind the horse, the arrow 28 indicating the direction of rotation of the curve. When the rider and the horse are synchronized, the points of tangency merge and become a cusp 26, as shown in Figure 4B.

Claims (7)

REVENDICATIONS1. Method for determining at least one characteristic of a mount / jumper torque, characterized in that it consists in determining the displacements of a point linked to the mount (10), the displacements of a point linked to the jumper ( 12), generating a signature (20) by synchronously coupling the displacements of a point linked to the jumper (12) and the displacements of a point linked to the frame (10) and determining at least one characteristic of the pair mount / jumper from at least one characteristic of the signature (20). 2. Method according to claim 1, characterized in that the method comprises a step of determining the inclination of the signature (20) which indicates the riding technique of the rider (12). 3. Method according to claim 2, characterized in that for the same pair of mount / rider and the same pace, the technique of mounting "seat" corresponds to a signature (20.1) which has an inclination greater than the corresponding signature (20.2) to the technique of monte known as "two points". 15 4. Method according to one of the preceding claims, characterized in that it comprises a step of determining the shape of the signature (20) which indicates the shape of the frame (10), said shape comprising at least one loop. 5. Method according to claim 4, characterized in that the signature (20) comprising a single loop corresponds to a pace type gallop. 20 6. Method according to claim 4, characterized in that the signature (20) comprising at least two loops corresponds to a trot type pace. 7. Method according to one of the preceding claims, characterized in that it comprises a step of determining the spacing of the points of tangency (22, 24) of a signature (20), said gap indicating the phase shift in the time between the mount (10) and the rider (12).