Patent Publication Number: US-2022211009-A1

Title: Method for viewing a video of a horse during a ride

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional of U.S. application Ser. No. 15/767,283 filed Apr. 10, 2018, which was a national stage application, filed under 35 U.S.C. § 371, of International application no. PCT/FR2016/052632 Oct. 12, 2016, which claims priority to FR application No. 15596694 filed Oct. 12, 2015. Each of the previously noted applications is hereby incorporated by reference herein in their entirety. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention and Description of the Related Art 
     This application relates to a horse riding saddle equipped with at least one sensor. The document FR-2,648,234 describes a device for taking measurements especially designed for horses. This device comprises an inverted U-shaped support that is attached on the exterior of the saddle, at the front of the saddle-tree. For this purpose, the support comprises two slightly conical openings, designed to receive two mounting pins carried by a plate that is integral with the saddle-tree of the saddle. This support comprises sensors such as accelerometers, for example, to measure characteristics relating to the movements of the horse. This device is not completely satisfactory because the connection between the support and the saddle is not rigid, which gives rise to disturbances in the area of the measurements taken by the sensors attached to the support. Consequently, to obtain usable results, the signals coming from the sensors must be processed, which tends to complicate the method of analyzing the results. 
     BRIEF SUMMARY OF THE INVENTION 
     This invention aims to eliminate the drawbacks of the prior art. 
     For this purpose, the invention has as its object a horse riding saddle characterized in that it comprises at least one sensor positioned in the saddle, near the pommel and connected to the saddle-tree by a thorough connection. 
     According to the invention, there is no relative movement between the sensor and the saddle-tree. Thus, the measurements obtained from the sensor(s) are not disturbed by vibratory phenomena and are representative of the movements of the horse. They can be used directly, which tends to simplify the methods of analyzing said measurements. 
     According to an embodiment, the saddle-tree comprises an arch, a bar that has two lateral bands whose rear ends are connected by a curved rear portion that supports a cantle and whose front ends are connected to the arch, and the saddle comprises:
         a fixed case containing the sensor(s) and that is attached under the arch of the saddle-tree,   a removable case containing at least one means for storing electric power,   a housing placed in the area of the cantle and designed to receive the removable case,   at least one wire connection connecting the fixed case and the removable case that has a connector.       

     Advantageously, the saddle-tree comprises a rigid shell that forms the housing, and the connector comprises a first part that is integral with the rigid shell and a second part that is integral with the removable case, the first and second parts being designed to be plugged into one another automatically when the removable case is translated in an insertion direction up to an inserted state of the removable case in the housing. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Other characteristics and advantages will emerge from the following description of the invention, a description given by way of example only, in relation to the accompanying drawings in which: 
         FIG. 1  is a side view of a horse equipped with a saddle that illustrates the invention, 
         FIG. 2  is a view in perspective of a saddle equipped with an electronic case that illustrates an embodiment of the invention, 
         FIG. 3  is a top view of the saddle that is seen in  FIG. 2 , 
         FIG. 4  is a view in perspective that illustrates a portion of the cantle of the saddle that is seen in  FIG. 2 , 
         FIG. 5  is a view in perspective showing an electronic case according to an embodiment of the invention, 
         FIG. 6  is a section of a saddle-tree that illustrates an embodiment of the assembly of an electronic case, 
         FIG. 7  is a view in perspective from the rear of the saddle-tree that illustrates another embodiment of the invention, in the inserted state, 
         FIG. 8  is a view in perspective from the rear of the saddle-tree that is seen in  FIG. 7 , in the withdrawn state, 
         FIG. 9  is a view in perspective of a housing placed in the area of the cantle, 
         FIG. 10  is a section of a cantle that illustrates the insertion of a case into a housing provided in the cantle area, 
         FIG. 11  is a view in perspective illustrating in an exploded view the different elements of the cantle of the saddle-tree that is seen in  FIG. 7 , 
         FIG. 12  shows a curve obtained from the measurements of a gyroscope that illustrates a means for identifying a jump, 
         FIG. 13  shows two curves obtained from the measurements of two accelerometers that illustrate a means for identifying a jump, 
         FIG. 14  is a view of a display device that makes it possible to display a video on which data is displayed concerning the characteristics of the horse and/or the rider. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the various figures, represented as  10  is a horse ridden by a rider  12 . 
     The horse  10  is equipped with a saddle  14  secured to the horse using a girth  15  that encircles the torso of the horse  10 . 
     For the rest of the description, the axis X is a horizontal axis parallel to the direction of advance of the horse. When the horse advances in a straight line, the axis X corresponds to the axis of the spinal column of the horse. The axis Y is a horizontal axis perpendicular to the axis X. The axis Z is an axis perpendicular to the axes X and Y. The axis Z is vertical. A longitudinal direction is merged with the axis X. A longitudinal plane passes through the axis X. A transverse plane is a plane perpendicular to the axis X. 
     The terms “front” and “rear” applied to a part of the saddle make reference to the horse, a front part of the saddle being directed toward the head of the horse and a rear part toward the tail. 
     The terms “upper” and “lower” applied to a part of the saddle make reference to the direction of the saddle when it is strapped onto the horse, an upper part of the saddle being directed toward the rider and a lower part being directed toward the horse. 
     The saddle  14  comprises a seat  16  for the rider and a pommel  18  located at the front of the seat  16 . 
     Structurally, the saddle  14  comprises a saddle-tree  20  and a covering that is not shown in these figures. The covering of the saddle is not further described because it is known to a person skilled in the art and can be identical to that of existing saddles. 
     The saddle-tree  20  is approximately symmetrical in relation to the longitudinal and vertical plane PMV. 
     According to an embodiment that is seen in  FIGS. 2 to 6 , the saddle-tree  20  comprises a frame  22  that has at the front an arch  24  that forms the pommel  18  of the saddle and at the rear a bar  26  that forms the seat  16 . In a transverse plane, the arch  24  has an Omega shape. The bar  26  comprises two lateral bands  28  whose rear ends are connected by a curved rear portion  30 . The front ends of the two lateral bands  28  are connected to the arch  24 . 
     As shown in  FIG. 3 , the arch  24  supports two blades  32  placed symmetrically relative to the longitudinal and vertical plane PMV. The curved rear portion  30  of the bar  26  supports a cantle  34 . 
     The arch  24  and the bar  26  form an opening  36  bounded by a peripheral edge  38 . 
     According to the embodiment that is seen in  FIG. 2 , the saddle-tree  20  also comprises a support  40  secured to the frame  22  by connection means  41  (which can be seen in  FIG. 6 ). 
     This support  40  rests on the upper periphery of the opening  36 . 
     Advantageously, the saddle-tree  20  is made of composite material. 
     The arch  24  and the bar  26  are not further described because they can be identical to those described in the document FR-2,972,438. 
     When the saddle  14  is strapped onto the horse  10  using the girth  16 , the saddle-tree  20 —and more particularly the front part of the saddle-tree  20 —perfectly follows the movements of the part of the body of the horse to which they are connected. 
     According to a first embodiment that is seen in  FIGS. 2 to 6 , the peripheral edge  38  of the opening  36  comprises a concave profile  42  on at least a part of each of the lateral bands  28 , as illustrated in  FIG. 6 . 
     This concave profile  42  comprises a C shape that is open toward the vertical median plane PMV with, on both sides, two bulges  44 ,  44 ′, for example a first bulge  44  positioned in the area of the upper surface of the saddle-tree  20  and a second bulge  44 ′ positioned in the area of the lower surface of the saddle-tree  20 . The function of this concave profile  42  will be explained later. 
     According to a characteristic of the invention, the saddle  14  comprises at least one sensor  50  that is integrated into the saddle  14 , positioned inside the covering of the saddle, in the vicinity of the pommel  18  and connected to the saddle-tree  20  by a thorough connection. A thorough connection is defined as the sensor  50  being immobile in relation to the saddle-tree  20 . Thus, there is no relative movement between the sensor  50  and the saddle-tree  20 . The sensor  50  or its support are directly connected to the saddle-tree  20  and not to the covering of the saddle. Since the front part of the saddle-tree  20  is itself essentially secured relative to the body of the horse, the sensor  50  takes measurements that are representative of the movements of the horse. According to the invention, the measurements are not disturbed by vibratory phenomena as in the case of the devices of the prior art that are mounted on the saddle and that are not connected directly to the saddle-tree of the saddle. 
     By way of example, the sensor(s) ( 50 ) is (are) selected from among the following sensors: accelerometer, gyroscope, tachometer, geolocating sensor, inclinometer, goniometer, inertia sensor, or the like. 
     The saddle  14  comprises an electronics device  52  in which the sensor(s)  50  is or are placed. 
     This electronics device  52  comprises at least one circuit board  54  and at least one means for storing electric power  56 . 
     For the rest of the description, the circuit board  54  is defined as one or more circuit board(s), and the means for storing electric power  56  is defined as one or more means for storing electric power. 
     Advantageously, the electronics device  52  comprises a case  58  in which the circuit board  54  and the means for storing electric power  56  are stored. The case  58  is designed to withstand impacts, deformations. The case  58  is tightly closed to protect the circuit board  54  and the means for storing electric power  56  from dust and moisture. 
     According to a first embodiment that is seen in  FIGS. 2 to 6 , the case  58  is approximately parallelepipedic and comprises two half-shells  58 . 1  and  58 . 2  that, when they are assembled, define a housing in which the circuit board  54  and the means for storing electric power  56  are placed. The two half-shells  58 . 1  and  58 . 2  are joined by any appropriate means, such as, for example, screws. 
     When the saddle  14  is strapped onto a horse  10 , the half-shell  58 . 1  corresponds to the upper half-shell, and the half-shell  58 . 2  corresponds to the lower half-shell. 
     Preferably, the circuit board  54  and/or the means for storing electric power  56  are immobilized relative to the case  58  by any appropriate means. According to an embodiment, the circuit board  54  is attached to the interior surface of one of the half-shells  58 . 1  using screws. 
     According to the first embodiment, as illustrated by  FIG. 6 , the case  58  is connected to the saddle-tree  20  by interlocking. This design makes it possible to obtain a thorough connection between the case  58  and the saddle tree  20  without a connecting element. 
     According to one design, the case  58  is positioned in the area of the opening  36 , in the vicinity of the pommel  18 . 
     Preferably, the case  58  comprises two wings  60 . 1  and  60 . 2  placed on both sides of the case  58 , symmetrically in relation to the vertical longitudinal plane PMV. Each wing  60 . 1  and  60 . 2  comprises a first end connected to the case  58  and a second free end  62  designed to work with the concave profile  42  of the peripheral edge  38  of the opening  36  of the saddle-tree  20 . The wings  60 . 1  and  60 . 2  and the concave profiles  42  are sized so that the second ends  62  are immobilized between the bulges  44 ,  44 ′ and so that the case  58  is immobile in a direction parallel to the axis Z. 
     Advantageously, the wings  60 . 1  and  60 . 2  are designed so that the distance between the second ends  62  of the wings  60 . 1  and  60 . 2  is very slightly greater than the maximum distance (in a transverse plane) separating the two concave profiles  42  of the peripheral edge  38 . Thus, the case  58  is forcibly inserted between the two concave profiles  42 . 
     Preferably, the second ends  62  each comprise a rectilinear generatrix  63  (which is seen, for example, in  FIG. 5 ), parallel to the axis X when the case  58  is mounted on the saddle-tree. According to an embodiment, each rectilinear generatrix  63  has a length greater than 1 cm. This design makes possible a better hold of the case  58 , the latter no longer being able to pivot around the axis Z when it is inserted between the two concave profiles  42 . According to this design, to secure the case  58  to the saddle-tree, the case  58  is introduced into the opening  36 , pivoted along the axis Z, and it is immobilized relative to the saddle-tree  20  by making it pivot so that the rectilinear generatrices  63  of the second ends  62  are oriented parallel to the axis X and cooperate with the concave profiles  42 . 
     According to an embodiment, each wing  60 . 1  and  60 . 2  is inclined downward so that the second end  62  is offset toward the horse relative to the first end when the case  58  is incorporated into the saddle  14  and when the saddle is strapped onto the horse. This design strengthens the bond between the case  58  and the saddle-tree  20  and makes it possible to offset the case  58  upward to disengage the part between the lateral bands  28 , as illustrated in  FIG. 6 . 
     According to the first embodiment, the saddle  14  comprises at least one connector  64  that is connected to the electronics device  52  and that is accessible from the outside of the saddle  14 . 
     According to a design, the saddle  14  comprises a single connector  64  placed at the rear of the saddle  14 , in the area of the cantle  34 . 
     In addition to the connector  64 , the saddle  14  comprises at least one wire  66 , generally a bundle of wires, which connects the connector  64  to the electronics device  52 . For the rest of the description, the term wire  66  is used to designate both a wire and a bundle of wires. 
     Advantageously, the wire  66  comprises at least two segments: a first segment  66 . 1  connected to the electronics device  52  and a second segment  66 . 2  connected to the connector  64 , the segments  66 . 2  being connected to one another by a mating connector  68 . 
     According to this concept, it is possible to incorporate the connector  64  into the cantle  34  during the manufacture of the saddle-tree  20 , prior to the placement of the covering. The electronics device  52  is incorporated into the saddle  14  after the placing of the covering on the upper surface of the saddle-tree  20 , just before the placing of the covering that covers the lower surface of the saddle-tree  20 . The electronics device  52  is then connected to the connector  64  by joining the mating connector  68 . 
     This concept makes it possible to incorporate the electronics device  52 , which is a sensitive element, at the end of the process of manufacturing the saddle  14 . Moreover, it makes it possible to simplify access and removal of the electronics device  52  for maintenance operations. 
     In terms of function, the connector  64  is used to recharge the means for storing electric power  56 , to modify the program or programs used in the circuit board  54 . Of course, the connector  64  is not limited to these functions. 
     According to an embodiment, the means for storing electric power  56  comprises batteries. 
     The circuit board  54  comprises at least one memory for storing data, at least one means for computing and processing data, a timing mechanism, a communications system, and at least one sensor  50 . According to an embodiment, the circuit board  54  comprises at least one central processing unit (microprocessor) that ensures the functions of storage of data, computing and processing of data, and timing. 
     According to a second embodiment that is seen in  FIGS. 7 to 11 , the sensor or sensors  50  is/are placed in a secured case  100  that is connected by a thorough connection to the saddle-tree  20 . 
     According to a design, the secured case  100  is secured by any appropriate means (screwing, gluing, or the like) onto the lower surface of the arch  24  in the area of the pommel. Thus, according to this second embodiment, the sensor or sensors  50  is/are directly connected to the saddle-tree  20 . By way of example, the sensors  50  are incorporated into a circuit board that is connected rigidly to the secured case  100  that is itself rigidly connected to the saddle-tree  20 . The zone under the arch in the area of the pommel is a protected location that makes it possible to limit the stresses on the secured case  100 . 
     At least one part of the electronics device  52  is placed in the secured case  100 . 
     According to this second embodiment, the saddle  14  comprises a removable case  102  in which at least one means for storing electric power  56  is stored. This design makes it possible to withdraw the removable case  102  to be able to recharge the means for storing electric power  56 . Thus, the saddle  14  does not need to be moved to recharge them. 
     The secured case  100  and the removable case  102  are connected by at least one wire connection that comprises a connector  104 . This connector  104  is designed to make possible a quick and simple connection between the secured case  100  and the removable case  102 . 
     Advantageously, in addition to the means for storing electric power  56 , the removable case  102  comprises a microprocessor and at least one communication system. Preferably, the removable case  102  comprises a connector, similar to the connector  64  used to recharge the means for storing electric power  56 , to modify the program or programs used in the microprocessor, a circuit board, the communication system. 
     According to the second embodiment, the rear part of the saddle-tree  20 , and particularly its cantle  34 , comprises a housing  106  designed to receive the removable case  102 . 
     The cantle  34  comprises a pad  108  made of polyurethane for example, secured to the upper surface of the curved rear portion  30  of the bar  26 . 
     This pad  108  comprises a cavity so as to form the housing  106  with the upper surface of the curved rear portion  30  of the bar  26 . 
     Advantageously, the cantle  34  comprises a rigid shell  110  that forms the housing  106 . This rigid shell  110  is secured rigidly to the upper surface of the curved rear portion  30  of the bar  26 . Thus, the housing  106  is delimited by rigid walls, namely the rigid shell  110  and a portion of the bar  26 . The rigid shell  110  has an inverted U shape in transverse planes and a height that increases from front to rear. Thus, the rigid shell  110  comprises an upper surface  110 . 1  and two lateral surfaces  110 . 2  and  110 . 3 . 
     According to this second embodiment, the removable case  102  is designed to deal with an inserted state as illustrated in  FIG. 7  and a withdrawn state as illustrated in  FIG. 8 . 
     The connector  104  comprises a first part  112  that is integral with the rigid shell  110  and a second part  114  that is integral with the removable case  102 , the first and second parts  112  and  114  being designed to be plugged into one another automatically when the removable case  102  is moved in translation in an insertion direction until the inserted state is reached. 
     According to a design that is seen in  FIG. 11 , the removable case  102  comprises, on the inside, a circuit board  116  secured to the removable case  102 , which incorporates the microprocessor and the communication system and which has a plug that forms the second part  114  of the connector  104 . This plug extends through the removable case  102  to protrude to the outside of the removable case  102  that is sealed. 
     According to the second embodiment, the removable case  102  comprises two rigid half-shells  118  and  120 , assembled by any appropriate means such as screws, for example. 
     One of the two half-shells  120  forms a rear panel that is designed to close the housing  106  when the removable case  102  is in the inserted state and when the first and second parts  112  and  114  of the connector  104  are connected. 
     To increase the autonomy of the means for storage of electric power  56 , the half-shell  120  of the removable case  102  comprises, on its outside surface (which is seen when the removable case is in the inserted state), at least one photovoltaic panel  124  (which is seen in  FIG. 10 ) to produce electric power and to recharge the means for storing electric power  56 . 
     Advantageously, a guide system  126  is provided to guide the removable case  102  during its insertion into the housing  106 . This guide system  126  comprises two slides parallel to the direction of insertion, placed on both sides of the removable case  102 . By way of example, grooves are provided on each lateral face  110 . 2  and  110 . 3  of the rigid shell  110 , into which ribs provided on both sides of the removable case  102  slide. The guide system  126  makes it possible to position the removable case  102  correctly in its housing  106  and facilitates the connection of the first and second parts  112 ,  114  of the connector  104 . 
     Preferably, the saddle-tree  20  comprises a locking system  128  to hold the removable case  102  in the inserted state and to keep the first and second parts  112 ,  114  of the connector  104  connected. 
     By way of example, the locking system  128  comprises a pin  130  that is designed to fit into a hole  132  made in the removable case  102  and that is positioned in the area of the curved rear portion  30  of the bar  26 . The pin  130  is designed to occupy a locked state in which the pin  130  is housed at least partially in the hole  132  of the removable case  102  and an unlocked state in which the pin  130  is positioned outside of the hole  132 . According to a design, the pin  130  is mobile in translation in a direction perpendicular to the direction of insertion. 
     The locking system comprises a spring to push the pin  130  into the locked state. 
     The pin  130  passes through the bar  26  and comprises a first end designed to work with the hole  132  of the removable case  102  and protruding above the curved rear portion  30  of the bar  26  in the locked state and a second end that can be accessed from below the curved rear portion  30  of the bar  26 . 
     Advantageously, to facilitate the actuation of the pin, the second end comprises a tab that can be gripped, making it possible to pull on the pin  130  against the spring so as to hold the pin in the unlocked state to be able to withdraw the removable case  102 . 
     Whatever the embodiment, the communication system is designed to operate with at least one communication protocol such as “Wifi,” “Bluetooth,” GSM, or the like. 
     According to an embodiment, the communication system operates with the “Bluetooth” protocol to communicate with a mobile device  70  such as a portable telephone, a smartphone, a tablet, a computer or the like placed in the vicinity of the saddle  14 . 
     Whatever the variant, the electronics device  52  is paired with a mobile device  70  by a communication system to make it possible for them to exchange data or information. 
     The electronics device  52  comprises at least one program used in the central processing unit. Preferably, the electronics device  52  comprises a first program to process the data coming from the sensor or sensors  50  and a second program designed to make the various elements present on the circuit board  54  operate and to manage the means for storage of electric power  56 . 
     The electronics device  52  is designed to detect at least one jump of the horse. 
     According to a first variant, the electronics device  52  comprises at least a first sensor to measure a characteristic of the movement of rotation around the axis Y. 
     According to an embodiment, the circuit board  54  comprises a gyroscope designed to measure a speed of rotation around the axis Y. The data measured by the gyroscope make it possible to obtain a curve  72  as illustrated in  FIG. 12  that represents an angular speed (expressed in radians per second) as a function of time (expressed in seconds). According to an embodiment, the peaks are filtered with a low-pass filter and a cutoff frequency of 1 Hz. 
     In addition to the gyroscope, the first program used in the electronics device  52  is designed to identify at least one peak  74  on the curve  72 , each peak  74  corresponding very probably to a jump. 
     According to a second variant, the electronics device  52  comprises at least a second sensor to measure an acceleration along the axis X and an acceleration along the axis Z. According to an embodiment, the circuit board  54  comprises a first accelerometer designed to measure an acceleration along the axis X and a second accelerometer designed to measure an acceleration along the axis Z. The data measured by the first accelerometer make it possible to obtain a curve  75  (which is seen in  FIG. 13 ) that corresponds to the acceleration along the axis X, and the data measured by the second accelerometer make it possible to obtain a curve  76  (which is seen in  FIG. 13 ) that corresponds to the acceleration along the axis Z. Each curve  75  and  76  represents an acceleration (expressed in m·s −2 ) as a function of time (expressed in seconds). 
     In addition to the accelerometers along the axes X and Z, the first program used in the electronics device  52  is designed to identify irregularities  75 ′ and  76 ′ respectively on the curves  75  and  76 , one jump corresponding to an irregularity  76 ′ on the curve  76  followed by an irregularity  75 ′ on the curve  75 . 
     Advantageously, the electronics device  52  combines the first and second variants and comprises at least one sensor for measuring a characteristic of the movement of rotation around the axis Y and at least one other sensor for measuring an acceleration along the axis X and an acceleration along the axis Z, a jump being identified at each peak of the speed of rotation around the axis Y and as a result of the irregularities of the accelerations along the axes X and Z. 
     Of course, the invention is not limited to these sensors. Thus, the electronics device  52  can comprise a positioning sensor that makes it possible to determine the trajectory of the horse or any other sensor that makes it possible to identify at least one characteristic of the movement of the horse, at least one physiological characteristic of the horse, or any other characteristic relative to the horse and/or the rider. 
     According to another characteristic of the invention, the data collected by the electronics device  52  are transmitted to a remote platform  78  that lists all of the data transmitted by the electronics devices  52  incorporated into different saddles. This solution makes it possible to consolidate at the same point all of the data collected to, inter alia, refine the algorithms that ensure the processing of the collected data. 
     According to a first embodiment, the data collected are transmitted directly by the electronics device  52  to the platform  78 . In this case, the electronics device  52  comprises a smartcard of the GSM type, making it possible to transmit the data via the telecommunications networks or via the Internet. 
     According to another embodiment, the data collected are transmitted by the electronics device  52  to a mobile device  70  by using a short-range communication protocol such as “Bluetooth,” for example. As a second step, the data collected are transmitted by the mobile device  70  to the platform  78  via the telecommunications networks or via the Internet. 
     The object of the invention is also to propose a method for synchronizing data collected during a course by the electronics device  52  that is incorporated into the saddle  14  with a video of the course. 
     For this purpose, a mobile device  70  equipped with a photographing system  80  is used to photograph the course and to obtain a video of the course. 
     In addition to the photographing system  80 , this mobile device  70  comprises a means for storing at least one video, a clock that establishes a first time mark and a communications system to pair it to the electronics device  52  that is incorporated into the saddle  14  of the horse  10  executing the course. 
     The mobile device  70  also comprises an application that makes it possible, inter alia, to transmit a signal for synchronization with the electronics device  52 . According to an embodiment, the application comprises at least one command that when it is activated, triggers the transmission of the synchronization signal in the form of a pulse, for example. The time of sending of the synchronization signal is known from the first time mark of the clock of the mobile device  70 . This synchronization signal received by the electronics device  52  virtually simultaneously to the sending indicates a time origin in a second time mark linked to the timing mechanism of the electronics device  52 . Thus, the second time mark of the electronics device  52  is synchronized with the first time mark of the mobile device  70 . 
     Since the beginning and end of the video are known from the first time mark, the timing of the taking of measurements of each piece of data collected is known in relation to the time origin of the second time mark, the timing of the time origin is known from the first time mark as a result of the synchronization signal, and the data collected are then synchronized to the video. 
     According to a first operating mode, the command for triggering the beginning of the video corresponds to the command for transmission of the synchronization signal. 
     According to a second operating mode, the application used in the mobile device  70  comprises a dedicated synchronization command that is activated before the command for triggering the beginning of the video. Thus, in this case, after the pairing of the electronics device  52  with the mobile device  70 , a user who desires to film a course and to display in a synchronized manner at least one piece of information determined from data collected by the electronics device  52  launches the application and activates the synchronization command. Upon receipt of the synchronization signal, the electronics device  52  triggers the collection of data. Subsequently, the user triggers the beginning of the video. 
     Advantageously, when the command for stopping the photographing is activated, a signal for stopping the taking of measurements is transmitted to the electronics device  52  by the mobile device  70 . Upon receipt of this stop signal, the electronics device  52  stops the collection of data. As a variant, the application comprises two commands: a first command for stopping the photographing and a second command for stopping the taking of measurements. As a variant, the synchronization signal can be transmitted by the electronics device in the direction of the mobile device  70 . 
     Whatever the operating mode, the method of synchronizing a video obtained from a mobile device  70  with data collected by an electronics device  52  installed on the horse comprises a first step that aims to pair the mobile device  70  and the electronics device  52  and a second step that aims to transmit a synchronization signal between the mobile device  70  and the electronics device  52  in such a way that the time mark of the electronics device  52  and the time mark of the mobile device  70  have a common point. 
     According to another characteristic, the invention proposes a method of displaying a video  82  of a course on which there can be seen at least one piece of information  84  that is determined from data collected by the electronics device  52  during the course, this piece of information  84  changing over time, all along the course. 
     By way of example, the piece of information  84  displayed simultaneously with the video  82  of the course comprises data relating to the strides (length, consistency), to the jumps (lift, symmetry of the lift, landing, . . . ). Of course, the invention is not limited to these pieces of information. 
     As illustrated in  FIG. 14 , the video  82  displays several pieces of information in different presentation forms (value, diagram, or the like). 
     According to the invention, the display method comprises, in addition to the steps of photographing, taking measurements and synchronization described previously, a step for determining the values of the pieces of information  84  from the flow of collected data and another step for editing that aims to overlay on at least certain images of the video  82  the value of the piece of information  84  that corresponds to each of these images. 
     According to an operating mode, the application used in the mobile device  70  has computing means that are sufficient to determine for at least some images of the video  82  the corresponding piece of information  84  from the collected data and to perform the editing. 
     According to another operating mode, the video and the data collected are transmitted to the platform  78  that determines—for at least some images—the corresponding piece of information  84  from the collected data and performs the editing. After editing, the video  82  with the piece of information  84  is transmitted to the mobile device  70  or another mobile device  70 ′ to make it possible for a user to display a video of the course, the values of the pieces of information  84  that are seen on the video  82  being synchronized to the images of the video. 
     To reduce the size of the video files and of the flow of data transmitted to the platform  78 , the video and the flow of collected data are resized as a function of the first jump and the last jump of the course. 
     The times of the first jump and of the last jump are determined from the data collected by the electronics device as previously explained, particularly from data collected by the gyroscope along the axis Y and by the accelerometer(s) along the axes X and Z. 
     According to an embodiment, the video and the flow of collected data are resized so that the beginning corresponds to a determined number of strides before the first jump and the end to a determined number of strides after the last jump. By way of example, the beginning corresponds to five strides before the first jump and the end to five strides after the last jump. 
     In some cases, the frequency of the photographing is different from the frequency of the taking of measurements. Generally, the frequency of the taking of measurements is greater than the frequency of the photographing. In this case, the method of displaying comprises a resampling step that aims to select for each image of the video the corresponding collected data from among the flow of collected data.