EP0682958B1 - Training device with stroke analysis for golfers - Google Patents

Training device with stroke analysis for golfers Download PDF

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Publication number
EP0682958B1
EP0682958B1 EP95480056A EP95480056A EP0682958B1 EP 0682958 B1 EP0682958 B1 EP 0682958B1 EP 95480056 A EP95480056 A EP 95480056A EP 95480056 A EP95480056 A EP 95480056A EP 0682958 B1 EP0682958 B1 EP 0682958B1
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EP
European Patent Office
Prior art keywords
main shaft
mobile
training device
axis
connecting means
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EP95480056A
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German (de)
French (fr)
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EP0682958A1 (en
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Raymond Denance
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Individual
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/0073—Means for releasably holding a ball in position; Balls constrained to move around a fixed point, e.g. by tethering
    • A63B69/0091—Balls fixed to a movable, tiltable or flexible arm
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/36—Training appliances or apparatus for special sports for golf
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/0073—Means for releasably holding a ball in position; Balls constrained to move around a fixed point, e.g. by tethering
    • A63B69/0079—Balls tethered to a line or cord

Definitions

  • the present invention relates to a drive device for golfers which allows you to measure and analyze the strike of a golf ball, by its distance between the shooting point and the point ball drop.
  • This training device allows golfers to train in a small space. Hitting the golf ball suspended from said device, golfers see the distance the golf ball would have normally traveled in normal conditions of a golf course.
  • the golfer also sees the shooting angle of his ball or, depending on the different embodiments, the distance existing between the point of fall of the ball and the perpendicular, from the initial trajectory, passing through the drop point.
  • Document FR-A-2,649,901 relates to a device allowing golfers to swing swings in small spaces. he consists of a standard golf ball attached to one end the cord, a base secured to a carpet fitted with a tee. The other end of the cord goes through the guide, wraps around the pulley. At the start, the spring is relaxed. The stopper is in support on the guide. After the swing, the ball stops, the spring, stretched, pulls the cord. The rollers block the pulley. The pedal controls the rebound of the spring. The pebbles driven by the pulley slows the return movement. The device according to the invention opposes the violent return and dangerous ball.
  • Document WO-A-91/01166 proposes a device allowing an individual to train alone or with a partner to type golf shots which includes a golf ball attached by a non-elastic cord to a coil of cord and an elastic segment attaching the rope to an anchor point of the device to facilitate the return of the ball.
  • the length of the rope can be determined by the golfer and wound up using the reel so put it away after use.
  • the document FR-A-2,598,924 has the particularity of a device for golfers, more commonly known as “driving range” golf course ", which is characterized in that it consists of a gallows whose horizontal branch carries a coil or the like, for supporting and unwinding a wire at the free end of which a golf ball is attached, the wire can be unwound from the top down to ground level and the coil can be blocked in rotation.
  • the goal is to allow golfers to practice their gestures, but without no possibility of analyzing the blow which results from it.
  • WO-A-93/08881 relates to a method and an apparatus used to measure the length of a golf drive, the method of measuring the initial speed of a golf ball attached to a rotary axis by means of a string.
  • the axis carries a slotted disc, which cooperates with a receiver unit and optical sensor to determine the angular speed of the axis.
  • the optical unit output signal serves as an input signal for an electrical device that will calculate the distance that the bullet would have traveled if it had not been tied. The calculated distance is displayed on a display device at liquid crystals.
  • the value of the length of the blow is not reliable since, due to the structure of the device, a small inclination of the golf ball suspension cable, moved in rotation, will cause increased friction and a loss of kinetic energy of the ball.
  • This is due to the fact that when the bale is rotated on a fixed axis at shoulders, it cannot describe a regular rotation, since the twine on the fixed axis will go from a shoulder to each other on every U-turn, which will slow the speed of the ball and cannot give even a rough idea of the strike of it. The distance displayed will therefore be distorted with respect to at the true distance.
  • the document US-A-3,472,075 relates to a system of golf simulation, in which the results associated with a stroke golf courses are indicated by a mobile display.
  • Bullets counterweights are attached to the ends of a tube which is carried by a horizontal shaft mounted movable in rotation.
  • a structure simulating the ground is located below the horizontal tree, of so that the balls continually pass over it.
  • the tree horizontal can also be moved axially, just like this is the case in rotation, and each movement is applied to a structure forming a screen.
  • a hint of reading or a marker is mobile on the screen, to allow the representation, on a reduced scale, of the trajectory of the ball.
  • the rotating movement poses no problem
  • the axial movement of the horizontal shaft is made by moving the tube and balls, located at the end of said tube, this displacement being carried out in "a single block".
  • the tube will therefore undergo bending forces to allow the shaft to be moved axially.
  • the structure of the simulation system is not adapted to receive such forces, which will increase friction and distort the angle and length values of shoot.
  • the object of the present invention is to resolve all of the disadvantages of the state of the art, by proposing a training device for golfers intended to measure and analyze the strike of a ball.
  • Said device is of the type consisting of a gallows whose free end of the branch horizontal is fitted with a cable suspended in a rotatable way and at the lower end of which the ball is fixed and suspended golf at ground level, when the device is at rest, the horizontal branch contains a main axis movable in rotation and in translation according to the distance and the shooting angle, the means link ensuring the connection between the upper end of the cable and main axis.
  • the device is characterized by the causes said connecting means to be a cam cooperating with the axis main mobile in rotation and translation so that any displacement of said connecting means in its plane, during the setting in rotation of the assembly, causes a displacement in translation of said main axis movable in rotation and in translation, transmits to said movable main axis, so proportional, the speed of rotation of the ball around said axis and its firing angle, and is characterized by the fact that one or several sensors transmit data to means which analyze the axis rotation speed to determine the distance of the shot and the transverse displacement of said movable axis to determine the distance between the drop point of the ball and the reference trajectory.
  • the first axis is placed above of the second axis.
  • the first axis is placed below the second axis.
  • the main movable axis in rotation and in translation is coaxially and partially enclosed in a hollow axis, and the connecting means and the end of the movable axis, which cooperates with said connecting means, are positioned inside a hollow nut, the hollow axis and the hollow nut forming a single mobile casing in rotation.
  • the second axis is integral with the hollow nut.
  • the main axis is partially enclosed in a coil and acts as a metal core, and the sensor (s) are sensitive to variations in magnetic fields due to displacement of the main axis inside the coil.
  • the main axis comprises, at the level of or optical sensors, on the one hand, a painting area reflecting light from a light source, and on the other hand, a paint area absorbing said light.
  • the interface between the two painting zones is then formed by an ellipse corresponding to a cross section with respect to the axis longitudinal of the moving axis.
  • the means of analyzing the data transmitted by the sensors are formed by at least one trigger, at least one sequencer, at least one integrator, and at least one comparator, which cooperate to display part of the distance on a screen of the shooting and on the other hand of the distance between the point of fall and the reference trajectory.
  • the device includes a base.
  • Figure 1 shows a general perspective view of a embodiment according to the invention where the device comprises a base allowing the golfer to position his feet on said base, which at the same time stabilizes the device on the ground.
  • Figure 2 shows a perspective view of another mode of achievement.
  • Figure 3 shows a longitudinal section of the branch upper horizontal of the gallows forming the frame of the drive device, in which the connecting piece is at rest or is rotated without deviation angular, according to another embodiment.
  • FIG. 4 represents a section along N-N in FIG. 3.
  • FIG. 5 represents a view identical to FIG. 3, but in which the connecting piece is animated by a movement of rotation with angular deviation to the right or to the left.
  • Figure 6 shows a longitudinal section of the branch upper horizontal of the gallows forming the frame of the drive device, according to another embodiment, in which the connecting piece is at rest or is animated by a rotational movement without angular deviation.
  • FIG. 7 represents a section along M-M of FIG. 6.
  • FIG. 8 represents a view identical to FIG. 6, but in which the connecting piece is animated by a movement of rotation with angular deviation to the right or to the left.
  • Figure 9 shows a developed end of the axis main bearing a painted helical band; in this figure, a full turn is delimited by the two dotted lines vertical.
  • FIG. 10 represents the information recorded at using sensors according to the angle of inclination taken by the part link, cable and golf ball.
  • Figure 11 shows the principle of the circuits used for bullet angle and distance calculations that she would have crossed if she had been free.
  • Figure 12 shows the voltage variations at the output of the various components forming the circuits used for the calculations.
  • the present invention relates to a drive device 1 intended for use by golfers 45 who wish to measure and analyze the strike of their shots.
  • This strike is made on a ball 2 which is fixed and suspended at the end of a cable 5, itself suspended so rotatable relative to a horizontal branch 4 of a bracket 3.
  • This bracket 3 forms, with a base 13, the whole of the structure of said device 1. This is clearly seen in the figure 1.
  • connecting means 6 or 16 which ensures the connection between the upper end of the cable 5 and an axis main mobile in rotation and in translation 7 or 17, present at the horizontal branch 4 of the bracket 3.
  • the essence of the invention resides in the fact that the means 6 or 16 has the possibility of transmitting to the axis main mobile 7 or 17, proportionally, the speed of rotation of the ball 2 around said axis 7 or 17, as well as the firing angle, i.e. the angle between the perpendicular plane to the moving axis and the plane of rotation of the ball.
  • a sensor 8 will allow transmit the data to means which will be described subsequently, these means being able to analyze on the one hand the speed of rotation of the movable main axis 7 or 17 for determine the distance of the shot, and on the other hand the displacement transverse of said movable axis 7 or 17 to determine the angle of firing and, by extension, the distance d between the point of fall and the perpendicular, coming from the initial trajectory 46, passing by the drop point.
  • the trajectory 46 is symbolized on the ground, formed by the base 13, by a straight line or initial trajectory 46. This distance d is easily calculated by the means of analysis of the data transmitted, by a simple trigonometric calculation, since d is related to the side opposite of a right triangle, whose angle we know and the hypotenuse which is equal to the shooting distance.
  • This connecting means 6 or 16 is formed by a cam 6 or 16.
  • This connecting means 6 or 16 cooperates with the main axis movable in rotation and in translation 7 or 17, via firstly of a first articulation axis 9 or 19, which is integral and perpendicular to said main axis 7 or 17, around from which the connecting means 9 or 19 can pivot in a formed plane by the main axis 7 or 17 and by the suspended cable 5, then, via a second articulation axis 10 or 20 parallel to the first axis 9 or 19; this second axis 10 or 20 is mobile in rotation, like said first axis 9 or 19, but fixed in translation, which is not the case for axis 9 or 19.
  • the first axis 9 is mobile in rotation as well as in translation. This one 9 is placed below the second axis 10.
  • the first axis 19 is placed above the second axis 20.
  • This first axis 19 is mobile in rotation and in translation, while the second axis 20 is movable in rotation only.
  • axes 10 and 20 which are fixed in translation, are secured to a hollow nut 12 or 22. This is itself secured to a hollow axis 11 or 21.
  • This hollow axis 11 or 21 is coaxial and partially encloses the main axis movable in rotation and in translation 7 or 17.
  • the main movable axis 7 or 17 exceeds, by its two ends, the hollow axis 11 or 21.
  • One of its ends cooperates with the connecting means 6 or 16 and is positioned inside the hollow nut 12 or 22.
  • the other end has the function of allowing the measurement on the one hand of the rotation of said movable axis 7 or 17 and on the other hand of its translation; it will therefore cooperate with the sensor 8.
  • the assembly formed by the hollow axis 11 or 21 and the hollow nut 12 or 22 forms a single mobile casing in rotation.
  • the second axis 10 or 20 will therefore be secured to the nut digs 12 or 22 and allows the rotation of the other axis 9 or 19 in the plane formed by the movable axis 7 or 17 and the cable 5, and thus, the displacement in translation of the main axis 7 or 17.
  • the connecting means 6 or 16 therefore has the function of a lever arm.
  • the free end of the main axis 7 or 17, which allows to analyze the length and the angle of shot, is placed in the field of action of a sensor 8, which according to a mode of realization may be sensitive to variations in magnetic field for example, using the movable axis 7 or 17 as a movable soft iron core inside a coil in which current is injected, which will tend to increase or decrease magnetic fields depending on the amount of iron soft present inside the coil.
  • the main axis 7 or 17 comprises, at the level of the sensor optics 8, on the one hand a painting area reflecting the light 14 coming from a light source, and on the other hand a paint area absorbing said light 15.
  • This interface 18 is formed by an ellipse corresponding to a bias cut from the longitudinal axis of the movable axis 7 or 17. This is clearly seen in Figures 3 and 6.
  • the device is thus thus made only when the cam 6 or 16 oscillates around its fixed axis in translation 10 or 20, the axis main mobile 7 or 17 in translation according to F3 or F4 or else F7 or F8 and in rotation, according to F9, moves longitudinally at inside the hollow axis 11 or 21 and its displacement is then proportional to the oscillation angle according to F1 or F2 or F5 or F6 of said cam 6 or 16.
  • optical sensor or the photoelectric cell 8 is placed opposite the part of the main axis 7 or 17 which carries the paint zones 14 and 15 and is substantially centered with respect to these 14 and 15.
  • an emitting diode and a cell 8 capable of capture the light received and reflected by zones 14 and 15 located next to the diode and cell 8, will allow determine the durations and the number of passages at the level of each zone of reflective 14 or absorbent 15 paint.
  • the photocell 8 goes follow line A of figures 9 and 10.
  • the passage time of the black area in front of said photoelectric will be equal to the time of passage of the reflective zone.
  • the cell will deliver an alternating signal in the form of a report slot cyclic substantially equal to one.
  • cell 8 will follow the sinusoidal line B which crosses the boundary between the black and reflective areas in half points. In this case, the rising and falling sides are will shift and the duty cycle will no longer be the same. he will be representative of the inclination of the plane of rotation of the ball.
  • the signal from the photoelectric cell 8 is sent to a shaping circuit, of trigger type 23 and whose output signal 34 is sent on the one hand to a sequencer 24 and on the other hand to an integrator 25.
  • the sequencer 24 generates control signals for the different electronics circuits. These signals come out on outputs 38, 39, 40 and 44.
  • An integrator 26 receives a reference voltage 31. It is triggered at a time TO by the output 38 of the sequencer 24 during the first rising edge of signal 34, from trigger 23. It integrates the reference voltage up to a time T1 triggered by the next rising edge of signal 34, therefore for the duration of an entire period of the input signal, i.e. during a full turn of ball 2, hereinafter called the reference turn.
  • the output 36 of this integrator will vary all the more quickly that its input voltage 35 will be large and therefore that the duration of the reference lap will have been long.
  • This output is sent to a comparator 30 which compares it to a reference voltage. When this voltage reaches the reference voltage, at a time T2, the comparator 30 sends a control signal 37 to sequencer 24.
  • the interval T2-T1 is shorter the more the input voltage of the integrator 27 is large and therefore that the reference turn has been long. This time is therefore proportional to the speed of the bullet when fired.
  • the sequencer 24 also controls, via its output 40, two successive integrators 28 and 29, during the interval T2-T1.
  • the integrator 28 receives the reference voltage 31 which it integrates therefore during the time interval T2-T1. Its output voltage, at time T2, is proportional to this interval T2-T1.
  • the integrator 29 integrates the output voltage 41 of the integrator 28 during the same time interval T2-T1.
  • Her output voltage 42, at time T2 will therefore be proportional to square of the interval T2-T1, and therefore proportional to the square of bullet speed 2 when fired. Since the distance traveled by ball 2 is itself proportional squared the initial speed of ball 2, the tension of output 42 of integrator 29 is representative of the distance traveled. It can be sent to a scaling module and display 32.
  • the calculation of the firing angle is done by an integrator 25 which receives on the one hand the slots 34 originating from the trigger 23 and on the other hand the reference voltage 31. It is controlled by the output 39 of sequencer 24. This controls this integrator 25 for a predetermined time rounded to an integer of period.
  • the integrator integrates the reference voltage 31 in one direction and when the same signal is low, said integrator integrates said reference voltage in the other direction.
  • the report cyclic of signal 34 is equal to 1, the result of this alternative integration is zero; when the duty cycle is different from 1, the result is proportional to the deviation of this cyclical report.
  • the output 43 of this integrator 25 therefore gives, with the corresponding sign, a voltage proportional to the angle shooting. This voltage is sent to the scaling module and display 32.
  • the transmitted signal by the sensors is shaped to be able to be analyzed by a microprocessor and allow the display on a screen of a part of the distance of the shot and the other part of the distance between the drop point and the perpendicular from the trajectory of reference passing through said drop point.
  • Time T2 is the signal period and is inversely proportional to the speed of the ball.
  • the T1 / T2 ratio is representative of the angle of the plane of rotation of the ball with respect to the vertical.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The device includes a stand (3) with a horizontal branch (4) at the top with a cable suspended from the end. The cable is mounted so it can rotate, and carries a golf ball on the lower end. A number of sensors within the stand detect the speed and angle at which the ball is struck by the golf club during a practice shot. From this, the distance travelled by the ball can be determined, for comparison with the reference trajectory which was intended. The mounting of the ball allows movement towards or away from the stand, as well as in the direction of swing. <IMAGE>

Description

La présente invention concerne un dispositif d'entraínement pour golfeurs qui permet de mesurer et d'analyser la frappe d'une balle de golf, par sa distance entre le point de tir et le point de chute de la balle.The present invention relates to a drive device for golfers which allows you to measure and analyze the strike of a golf ball, by its distance between the shooting point and the point ball drop.

Ce dispositif d'entraínement permet aux golfeurs de s'entrainer dans un espace réduit. En frappant la balle de golf suspendue audit dispositif, les golfeurs voient s'afficher la distance que la balle de golf aurait normalement parcourue dans des conditions normales d'un parcours de golf.This training device allows golfers to train in a small space. Hitting the golf ball suspended from said device, golfers see the distance the golf ball would have normally traveled in normal conditions of a golf course.

Le golfeur voit également s'afficher l'angle de tir de sa balle ou, selon les différents modes de réalisation, la distance existant entre le point de chute de la balle et la perpendiculaire, issue de la trajectoire initiale, passant par le point de chute.The golfer also sees the shooting angle of his ball or, depending on the different embodiments, the distance existing between the point of fall of the ball and the perpendicular, from the initial trajectory, passing through the drop point.

L'état de la technique peut être défini par les brevets suivants.State of the art can be defined by patents following.

Le document FR-A-2.649.901 concerne un dispositif permettant aux golfeurs d'effectuer des swings sur des espaces réduits. Il se compose d'une balle de golf réglementaire fixée à une extrémité du cordon, d'un socle solidaire d'un tapis équipé d'un tee. L'autre extrémité du cordon passe dans le guide, s'enroule sur la poulie. Au départ, le ressort est détendu. Le butoir est en appui sur le guide. Après le swing, la balle s'arrête, le ressort,Document FR-A-2,649,901 relates to a device allowing golfers to swing swings in small spaces. he consists of a standard golf ball attached to one end the cord, a base secured to a carpet fitted with a tee. The other end of the cord goes through the guide, wraps around the pulley. At the start, the spring is relaxed. The stopper is in support on the guide. After the swing, the ball stops, the spring, tendu, exerce une traction sur le cordon. Les galets bloquent la poulie. La pédale commande la détente du ressort. Les galets entraínés par la poulie freinent le mouvement de retour. Le dispositif selon l'invention s'oppose au retour violent et dangereux de la balle.stretched, pulls the cord. The rollers block the pulley. The pedal controls the rebound of the spring. The pebbles driven by the pulley slows the return movement. The device according to the invention opposes the violent return and dangerous ball.

Le document WO-A-91/01166 propose un dispositif permettant à un individu de s'entraíner seul ou avec un partenaire à taper des coups de golf qui comprend une balle de golf attachée par une corde non élastique à une bobine de corde et un segment élastique rattachant la corde à une pointe d'ancrage du dispositif pour faciliter le retour de la balle. La longueur de la corde peut être déterminée par le golfeur et enroulée à l'aide de la bobine afin de la ranger après utilisation.Document WO-A-91/01166 proposes a device allowing an individual to train alone or with a partner to type golf shots which includes a golf ball attached by a non-elastic cord to a coil of cord and an elastic segment attaching the rope to an anchor point of the device to facilitate the return of the ball. The length of the rope can be determined by the golfer and wound up using the reel so put it away after use.

Le document FR-A-2.598.924 a pour particularité un dispositif d'entraínement pour golfeurs, plus couramment dénommé "practice de golf", qui est caractérisé en ce qu'il est constitué par une potence dont la branche horizontale porte une bobine ou analogue, de support et de déroulement d'un fil à l'extrémité libre duquel est fixée une balle de golf, le fil pouvant être déroulé du haut vers le bas jusqu'au niveau du sol et la bobine pouvant être bloquée en rotation.The document FR-A-2,598,924 has the particularity of a device for golfers, more commonly known as "driving range" golf course ", which is characterized in that it consists of a gallows whose horizontal branch carries a coil or the like, for supporting and unwinding a wire at the free end of which a golf ball is attached, the wire can be unwound from the top down to ground level and the coil can be blocked in rotation.

Pour tous ces dispositifs, le but recherché est de permettre aux golfeurs de s'entraíner au niveau de leur geste, mais sans aucune possibilité d'analyser le coup qui en découle.For all these devices, the goal is to allow golfers to practice their gestures, but without no possibility of analyzing the blow which results from it.

Tel n'est pas le cas de la présente invention, ni du document suivant.This is not the case with the present invention, nor with the next document.

Le document WO-A-93/08881 a trait à un procédé et un appareil servant à mesurer la longueur d'un drive de golf, le procédé consistant à mesurer la vitesse initiale d'une balle de golf attachée à un axe rotatif par l'intermédiaire d'une ficelle. L'axe porte un disque à fentes, qui coopère avec une unité récepteur et capteur optique afin de déterminer la vitesse angulaire de l'axe. Le signal de sortie de l'unité optique sert de signal d'entrée pour un dispositif électrique qui va calculer la distance que la balle aurait parcourue si elle n'avait pas été attachée. LaWO-A-93/08881 relates to a method and an apparatus used to measure the length of a golf drive, the method of measuring the initial speed of a golf ball attached to a rotary axis by means of a string. The axis carries a slotted disc, which cooperates with a receiver unit and optical sensor to determine the angular speed of the axis. The optical unit output signal serves as an input signal for an electrical device that will calculate the distance that the bullet would have traveled if it had not been tied. The distance calculée est affichée sur un dispositif d'affichage à cristaux liquides.calculated distance is displayed on a display device at liquid crystals.

Dans ce cas, il est possible de connaítre la longueur du coup de golf. Néanmoins, cet appareil a deux inconvénients essentiels.In this case, it is possible to know the length of the shot golf. However, this device has two essential drawbacks.

D'une part, la valeur de la longueur du coup n'est pas fiable puisque, du fait de la structure de l'appareil, une petite inclinaison du câble de suspension de la balle de golf, mû en rotation, va entraíner une augmentation des frottements et une perte de l'énergie cinétique de la balle. Ceci est dû au fait que lorsque la balle est mue en rotation sur un axe fixe à épaulements, elle ne peut pas décrire une rotation régulière, étant donné que la ficelle sur l'axe fixe va aller d'un épaulement à l'autre à chaque demi-tour, ce qui va ralentir la vitesse de la balle et ne peut donner une idée même approximative de la frappe de celle-ci. La distance affichée sera donc faussée par rapport à la distance véritable.On the one hand, the value of the length of the blow is not reliable since, due to the structure of the device, a small inclination of the golf ball suspension cable, moved in rotation, will cause increased friction and a loss of kinetic energy of the ball. This is due to the fact that when the bale is rotated on a fixed axis at shoulders, it cannot describe a regular rotation, since the twine on the fixed axis will go from a shoulder to each other on every U-turn, which will slow the speed of the ball and cannot give even a rough idea of the strike of it. The distance displayed will therefore be distorted with respect to at the true distance.

D'autre part, il n'est pas possible de mesurer l'angle de tir de la balle par rapport à la trajectoire de référence de la balle représentée sur le tapis de sol formé par le socle.On the other hand, it is not possible to measure the firing angle of the ball relative to the reference path of the ball shown on the floor mat formed by the base.

Enfin, le document US-A-3.472.075 a pour objet un système de simulation de golf, dans lequel les résultats associés à un coup de golf sont indiqués par un affichage mobile. Des balles de contrepoids sont fixées aux extrémités d'un tube qui est porté par un arbre horizontal monté mobile en rotation. Une structure simulant le sol est située en dessous de l'arbre horizontal, de sorte que les balles passent continuellement au-dessus. L'arbre horizontal peut également être déplacé axialement, tout comme c'est le cas en rotation, et chaque mouvement est appliqué à une structure formant un écran. Plus précisément, une pointe de lecture ou un marqueur est mobile sur l'écran, afin de permettre la représentation, à échelle réduite, de la trajectoire de la balle.Finally, the document US-A-3,472,075 relates to a system of golf simulation, in which the results associated with a stroke golf courses are indicated by a mobile display. Bullets counterweights are attached to the ends of a tube which is carried by a horizontal shaft mounted movable in rotation. A structure simulating the ground is located below the horizontal tree, of so that the balls continually pass over it. The tree horizontal can also be moved axially, just like this is the case in rotation, and each movement is applied to a structure forming a screen. Specifically, a hint of reading or a marker is mobile on the screen, to allow the representation, on a reduced scale, of the trajectory of the ball.

Dans ce document, le mouvement en rotation ne pose aucun problème, par contre le mouvement axial de l'arbre horizontal se fait par déplacement du tube et des balles, situées à l'extrémité dudit tube, ce déplacement s'effectuant en "un seul bloc". Le tube va donc subir des forces de flexion pour permettre à l'arbre d'être déplacé axialement. La structure du système de simulation n'est pas adaptée à recevoir de telles forces, ce qui va augmenter les frottements et fausser les valeurs d'angle et de longueur de tir.In this document, the rotating movement poses no problem, on the other hand the axial movement of the horizontal shaft is made by moving the tube and balls, located at the end of said tube, this displacement being carried out in "a single block". The tube will therefore undergo bending forces to allow the shaft to be moved axially. The structure of the simulation system is not adapted to receive such forces, which will increase friction and distort the angle and length values of shoot.

En fait, il n'y a pas de moyen de liaison permettant l'inclinaison du tube par rapport à l'arbre horizontal, comme c'est le cas avec la présente invention.In fact, there is no linkage allowing the inclination of the tube relative to the horizontal shaft, as this is the case with the present invention.

De plus, l'ensemble des données est mesuré mécaniquement, l'efficacité et le coût de fabrication d'un tel système sont donc inadaptés à une commercialisation importante.In addition, all of the data is measured mechanically, the efficiency and the manufacturing cost of such a system are therefore unsuitable for large commercialization.

La présente invention a pour but de résoudre l'ensemble des inconvénients de l'état de la technique, en proposant un dispositif d'entraínement pour golfeurs destiné à mesurer et analyser la frappe d'une balle. Ledit dispositif est du type constitué d'une potence dont l'extrémité libre de la branche horizontale est équipée d'un câble suspendu de manière rotative et à l'extrémité inférieure duquel est fixée et suspendue la balle de golf au niveau du sol, lorsque le dispositif est au repos, la branche horizontale contient un axe principal mobile en rotation et en translation selon la distance et l'angle de tir, le moyen de liaison assurant la liaison entre l'extrémité supérieure du câble et l'axe principal. Le dispositif est caractérisé par le fait que ledit moyen de liaison est une came coopérant avec l'axe principal mobile en rotation et en translation de manière à ce que tout déplacement dudit moyen de liaison dans son plan, lors de la mise en rotation de l'ensemble, entraíne un déplacement en translation dudit axe principal mobile en rotation et en translation, transmet audit axe principal mobile, de manière proportionnelle, la vitesse de rotation de la balle autour dudit axe et son angle de tir, et est caractérisé par le fait qu'un ou plusieurs capteurs transmettent des données à des moyens qui analysent la vitesse de rotation de l'axe pour déterminer la distance du tir et le déplacement transversal dudit axe mobile pour déterminer la distance entre le point de chute de la balle et la trajectoire de référence.The object of the present invention is to resolve all of the disadvantages of the state of the art, by proposing a training device for golfers intended to measure and analyze the strike of a ball. Said device is of the type consisting of a gallows whose free end of the branch horizontal is fitted with a cable suspended in a rotatable way and at the lower end of which the ball is fixed and suspended golf at ground level, when the device is at rest, the horizontal branch contains a main axis movable in rotation and in translation according to the distance and the shooting angle, the means link ensuring the connection between the upper end of the cable and main axis. The device is characterized by the causes said connecting means to be a cam cooperating with the axis main mobile in rotation and translation so that any displacement of said connecting means in its plane, during the setting in rotation of the assembly, causes a displacement in translation of said main axis movable in rotation and in translation, transmits to said movable main axis, so proportional, the speed of rotation of the ball around said axis and its firing angle, and is characterized by the fact that one or several sensors transmit data to means which analyze the axis rotation speed to determine the distance of the shot and the transverse displacement of said movable axis to determine the distance between the drop point of the ball and the reference trajectory.

Le moyen de liaison coopère avec l'axe principal mobile en rotation et en translation par l'intermédiaire :

  • d'un premier axe d'articulation solidaire et perpendiculaire audit axe principal, autour duquel le moyen de liaison peut pivoter dans un plan formé par l'axe principal et par le câble suspendu, et
  • d'un second axe d'articulation parallèle au premier axe qui est mobile en rotation mais fixe en translation,
de manière à ce que tout déplacement dudit moyen de liaison dans son plan, lors de la mise en rotation de l'ensemble, entraíne le déplacement en translation dudit axe principal mobile en rotation et en translation.The connecting means cooperates with the main axis mobile in rotation and in translation by means of:
  • a first articulation axis integral and perpendicular to said main axis, around which the connecting means can pivot in a plane formed by the main axis and by the suspended cable, and
  • a second articulation axis parallel to the first axis which is mobile in rotation but fixed in translation,
so that any movement of said connecting means in its plane, when the assembly is rotated, causes the displacement in translation of said main axis movable in rotation and in translation.

Selon un mode de réalisation, le premier axe est placé au-dessus du second axe.According to one embodiment, the first axis is placed above of the second axis.

Selon un autre mode de réalisation, le premier axe est placé au-dessous du second axe.According to another embodiment, the first axis is placed below the second axis.

Quel que soit le mode de réalisation, l'axe principal mobile en rotation et en translation est coaxialement et partiellement enserré dans un axe creux, et le moyen de liaison et l'extrémité de l'axe mobile, qui coopère avec ledit moyen de liaison, sont positionnés à l'intérieur d'une noix creuse, l'axe creux et la noix creuse formant un seul et même carter mobile en rotation. Le second axe est solidaire de la noix creuse.Whatever the embodiment, the main movable axis in rotation and in translation is coaxially and partially enclosed in a hollow axis, and the connecting means and the end of the movable axis, which cooperates with said connecting means, are positioned inside a hollow nut, the hollow axis and the hollow nut forming a single mobile casing in rotation. The second axis is integral with the hollow nut.

L'axe principal est partiellement enserré dans une bobine et joue le rôle de noyau métallique, et le ou les capteurs sont sensibles aux variations de champs magnétiques dues au déplacement de l'axe principal à l'intérieur de la bobine.The main axis is partially enclosed in a coil and acts as a metal core, and the sensor (s) are sensitive to variations in magnetic fields due to displacement of the main axis inside the coil.

Dans un autre cas, l'axe principal comporte, au niveau du ou des capteurs optiques, d'une part, une zone de peinture réfléchissant la lumière provenant d'une source lumineuse, et d'autre part, une zone de peinture absorbant ladite lumière. L'interface entre les deux zones de peinture est alors formée par une ellipse correspondant à une coupe de biais par rapport à l'axe longitudinal de l'axe mobile.In another case, the main axis comprises, at the level of or optical sensors, on the one hand, a painting area reflecting light from a light source, and on the other hand, a paint area absorbing said light. The interface between the two painting zones is then formed by an ellipse corresponding to a cross section with respect to the axis longitudinal of the moving axis.

Les moyens d'analyse des données transmises par les capteurs sont formés par au moins un déclencheur, au moins un séquenceur, au moins un intégrateur, et au moins un comparateur, qui coopèrent pour permettre l'affichage sur un écran, d'une part de la distance du tir et d'autre part de la distance entre le point de chute et la trajectoire de référence. Le dispositif comprend un socle.The means of analyzing the data transmitted by the sensors are formed by at least one trigger, at least one sequencer, at least one integrator, and at least one comparator, which cooperate to display part of the distance on a screen of the shooting and on the other hand of the distance between the point of fall and the reference trajectory. The device includes a base.

Les dessins ci-joints sont donnés à titre d'exemples indicatifs et non limitatifs. Ils représentent plusieurs modes de réalisation préférés selon l'invention. Ils permettront de comprendre aisément l'invention.The attached drawings are given as examples indicative and not limiting. They represent several modes of preferred embodiments according to the invention. They will allow easily understand the invention.

La figure 1 représente une vue générale en perspective d'un mode de réalisation selon l'invention où le dispositif comporte un socle permettant au golfeur de positionner ses pieds sur ledit socle, ce qui stabilise en même temps le dispositif sur le sol.Figure 1 shows a general perspective view of a embodiment according to the invention where the device comprises a base allowing the golfer to position his feet on said base, which at the same time stabilizes the device on the ground.

La figure 2 représente une vue en perspective d'un autre mode de réalisation.Figure 2 shows a perspective view of another mode of achievement.

La figure 3 représente une coupe longitudinale de la branche horizontale supérieure de la potence formant l'armature du dispositif d'entraínement, dans laquelle la pièce de liaison est au repos ou est animée d'un mouvement de rotation sans déviation angulaire, selon un autre mode de réalisation.Figure 3 shows a longitudinal section of the branch upper horizontal of the gallows forming the frame of the drive device, in which the connecting piece is at rest or is rotated without deviation angular, according to another embodiment.

La figure 4 représente une coupe selon N-N de la figure 3.FIG. 4 represents a section along N-N in FIG. 3.

La figure 5 représente une vue identique à la figure 3, mais dans laquelle la pièce de liaison est animée d'un mouvement de rotation avec déviation angulaire vers la droite ou vers la gauche.FIG. 5 represents a view identical to FIG. 3, but in which the connecting piece is animated by a movement of rotation with angular deviation to the right or to the left.

La figure 6 représente une coupe longitudinale de la branche horizontale supérieure de la potence formant l'armature du dispositif d'entraínement, selon un autre mode de réalisation, dans laquelle la pièce de liaison est au repos ou est animée d'un mouvement de rotation sans déviation angulaire. Figure 6 shows a longitudinal section of the branch upper horizontal of the gallows forming the frame of the drive device, according to another embodiment, in which the connecting piece is at rest or is animated by a rotational movement without angular deviation.

La figure 7 représente une coupe selon M-M de la figure 6.FIG. 7 represents a section along M-M of FIG. 6.

La figure 8 représente une vue identique à la figure 6, mais dans laquelle la pièce de liaison est animée d'un mouvement de rotation avec déviation angulaire vers la droite ou vers la gauche.FIG. 8 represents a view identical to FIG. 6, but in which the connecting piece is animated by a movement of rotation with angular deviation to the right or to the left.

La figure 9 montre un développé de l'extrémité de l'axe principal portant une bande hélicoïdale peinte ; sur cette figure, un tour complet est délimité par les deux traits pointillés verticaux.Figure 9 shows a developed end of the axis main bearing a painted helical band; in this figure, a full turn is delimited by the two dotted lines vertical.

La figure 10 représente les informations enregistrées à l'aide des capteurs selon l'angle d'inclinaison pris par la pièce de liaison, le câble et la balle de golf.FIG. 10 represents the information recorded at using sensors according to the angle of inclination taken by the part link, cable and golf ball.

La figure 11 montre le principe des circuits utilisés pour les calculs de l'angle de tir de la balle et de la distance qu'elle aurait franchi si elle avait été libre.Figure 11 shows the principle of the circuits used for bullet angle and distance calculations that she would have crossed if she had been free.

La figure 12 représente les variations de tension à la sortie des différents composants formant les circuits utilisés pour les calculs.Figure 12 shows the voltage variations at the output of the various components forming the circuits used for the calculations.

La présente invention concerne un dispositif d'entraínement 1 destiné à être utilisé par des golfeurs 45 qui désirent mesurer et analyser la frappe de leurs coups.The present invention relates to a drive device 1 intended for use by golfers 45 who wish to measure and analyze the strike of their shots.

Cette frappe s'effectue sur une balle 2 qui est fixée et suspendue à l'extrémité d'un câble 5, lui-même suspendu de manière rotative par rapport à une branche horizontale 4 d'une potence 3.This strike is made on a ball 2 which is fixed and suspended at the end of a cable 5, itself suspended so rotatable relative to a horizontal branch 4 of a bracket 3.

Cette potence 3 forme, avec un socle 13, l'ensemble de la structure dudit dispositif 1. C'est ce que l'on voit bien à la figure 1.This bracket 3 forms, with a base 13, the whole of the structure of said device 1. This is clearly seen in the figure 1.

Selon les figures 3 et 6, deux modes préférentiels de réalisation sont représentés.According to Figures 3 and 6, two preferred modes of achievement are shown.

Ceux-ci ont en commun un moyen de liaison 6 ou 16 qui assure la liaison entre l'extrémité supérieure du câble 5 et un axe principal mobile en rotation et en translation 7 ou 17, présent au niveau de la branche horizontale 4 de la potence 3.These have in common a connecting means 6 or 16 which ensures the connection between the upper end of the cable 5 and an axis main mobile in rotation and in translation 7 or 17, present at the horizontal branch 4 of the bracket 3.

L'essentiel de l'invention réside dans le fait que le moyen de liaison 6 ou 16 a la possibilité de transmettre à l'axe principal mobile 7 ou 17, de manière proportionnelle, la vitesse de rotation de la balle 2 autour dudit axe 7 ou 17,ainsi que l'angle de tir, c'est-à-dire l'angle entre le plan perpendiculaire à l'axe mobile et le plan de rotation de la balle.The essence of the invention resides in the fact that the means 6 or 16 has the possibility of transmitting to the axis main mobile 7 or 17, proportionally, the speed of rotation of the ball 2 around said axis 7 or 17, as well as the firing angle, i.e. the angle between the perpendicular plane to the moving axis and the plane of rotation of the ball.

C'est ce que l'on voit bien aux figures 5 et 8.This is clearly seen in Figures 5 and 8.

Dans tous les cas de figures, un capteur 8 va permettre de transmettre les données à des moyens qui seront décrits ultérieurement, ces moyens ayant la faculté d'analyser d'une part la vitesse de rotation de l'axe principal mobile 7 ou 17 pour déterminer la distance du tir, et d'autre part le déplacement transversal dudit axe mobile 7 ou 17 pour déterminer l'angle de tir et, par extension, la distance d entre le point de chute et la perpendiculaire, issue de la trajectoire initiale 46, passant par le point de chute. La trajectoire 46 est symbolisée sur le sol, formé par le socle 13, par un segment de droite ou trajectoire initiale 46. Cette distance d est aisément calculée par les moyens d'analyse des données transmises, par un simple calcul trigonométrique, étant donné que d s'apparente au côté opposé d'un triangle rectancle, dont on connaít l'angle et l'hypoténuse qui est égale à la distance de tir.In all cases, a sensor 8 will allow transmit the data to means which will be described subsequently, these means being able to analyze on the one hand the speed of rotation of the movable main axis 7 or 17 for determine the distance of the shot, and on the other hand the displacement transverse of said movable axis 7 or 17 to determine the angle of firing and, by extension, the distance d between the point of fall and the perpendicular, coming from the initial trajectory 46, passing by the drop point. The trajectory 46 is symbolized on the ground, formed by the base 13, by a straight line or initial trajectory 46. This distance d is easily calculated by the means of analysis of the data transmitted, by a simple trigonometric calculation, since d is related to the side opposite of a right triangle, whose angle we know and the hypotenuse which is equal to the shooting distance.

Ainsi, le calcul suivant permet d'obtenir d : sinus (angle de tir) = d / distance de tir d'où, d = sinus (angle de tir) x distance de tir Thus, the following calculation makes it possible to obtain d: sine (firing angle) = d / firing distance from where, d = sine (firing angle) x firing distance

Ce moyen de liaison 6 ou 16 est formé par une came 6 ou 16.This connecting means 6 or 16 is formed by a cam 6 or 16.

Ce moyen de liaison 6 ou 16 coopère avec l'axe principal mobile en rotation et en translation 7 ou 17, par l'intermédiaire tout d'abord d'un premier axe d'articulation 9 ou 19, qui est solidaire et perpendiculaire audit axe principal 7 ou 17, autour duquel le moyen de liaison 9 ou 19 peut pivoter dans un plan formé par l'axe principal 7 ou 17 et par le câble suspendu 5, ensuite, par l'intermédiaire d'un second axe d'articulation 10 ou 20 parallèle au premier axe 9 ou 19 ; ce second axe 10 ou 20 est mobile en rotation, comme ledit premier axe 9 ou 19, mais fixe en translation, ce qui n'est pas le cas de l'axe 9 ou 19.This connecting means 6 or 16 cooperates with the main axis movable in rotation and in translation 7 or 17, via firstly of a first articulation axis 9 or 19, which is integral and perpendicular to said main axis 7 or 17, around from which the connecting means 9 or 19 can pivot in a formed plane by the main axis 7 or 17 and by the suspended cable 5, then, via a second articulation axis 10 or 20 parallel to the first axis 9 or 19; this second axis 10 or 20 is mobile in rotation, like said first axis 9 or 19, but fixed in translation, which is not the case for axis 9 or 19.

De cette façon, tout déplacement du moyen de liaison dans son plan, lors de la mise en rotation de l'ensemble balle 2-câble 5-pièce de liaison 6 ou 16, entraíne le déplacement en translation dudit axe principal mobile 7 ou 17.In this way, any displacement of the connecting means in its plan, when the ball 2-cable 5-piece assembly is rotated link 6 or 16, causes displacement in translation of said movable main axis 7 or 17.

Dans le cas représenté aux figures 3 à 5, le premier axe 9 est mobile en rotation ainsi qu'en translation. Celui-ci 9 est placé en dessous du second axe 10.In the case shown in Figures 3 to 5, the first axis 9 is mobile in rotation as well as in translation. This one 9 is placed below the second axis 10.

Sur le mode de réalisation des figures 6 à 8, le premier axe 19 est placé au-dessus du second axe 20.In the embodiment of Figures 6 to 8, the first axis 19 is placed above the second axis 20.

Ce premier axe 19 est mobile en rotation et en translation, alors que le second axe 20 est mobile en rotation uniquement.This first axis 19 is mobile in rotation and in translation, while the second axis 20 is movable in rotation only.

Dans les deux cas, les axes 10 et 20, qui sont fixes en translation, sont solidarisés à une noix creuse 12 ou 22. Celle-ci est elle-même solidaire d'un axe creux 11 ou 21.In both cases, axes 10 and 20, which are fixed in translation, are secured to a hollow nut 12 or 22. This is itself secured to a hollow axis 11 or 21.

Cet axe creux 11 ou 21 est coaxial et enserre partiellement l'axe principal mobile en rotation et en translation 7 ou 17.This hollow axis 11 or 21 is coaxial and partially encloses the main axis movable in rotation and in translation 7 or 17.

Pour faciliter la rotation de l'axe creux 11 ou 21, celui-ci est monté sur des paliers 33.To facilitate the rotation of the hollow axis 11 or 21, it is mounted on bearings 33.

En fait, l'axe principal mobile 7 ou 17 dépasse, par ses deux extrémités, l'axe creux 11 ou 21.In fact, the main movable axis 7 or 17 exceeds, by its two ends, the hollow axis 11 or 21.

L'une de ses extrémités coopère avec le moyen de liaison 6 ou 16 et est positionnée à l'intérieur de la noix creuse 12 ou 22.One of its ends cooperates with the connecting means 6 or 16 and is positioned inside the hollow nut 12 or 22.

L'autre extrémité a pour fonction de permettre la mesure d'une part de la rotation dudit axe mobile 7 ou 17 et d'autre part de sa translation ; elle va donc coopérer avec le capteur 8.The other end has the function of allowing the measurement on the one hand of the rotation of said movable axis 7 or 17 and on the other hand of its translation; it will therefore cooperate with the sensor 8.

L'ensemble formé par l'axe creux 11 ou 21 et la noix creuse 12 ou 22 forme un seul et même carter mobile en rotation.The assembly formed by the hollow axis 11 or 21 and the hollow nut 12 or 22 forms a single mobile casing in rotation.

Le second axe 10 ou 20 va donc être solidarisé à la noix creuse 12 ou 22 et permettre la rotation de l'autre axe 9 ou 19 dans le plan formé par l'axe mobile 7 ou 17 et le câble 5, et ainsi, le déplacement en translation de l'axe principal 7 ou 17. Le moyen de liaison 6 ou 16 a donc une fonction de bras de levier.The second axis 10 or 20 will therefore be secured to the nut digs 12 or 22 and allows the rotation of the other axis 9 or 19 in the plane formed by the movable axis 7 or 17 and the cable 5, and thus, the displacement in translation of the main axis 7 or 17. The connecting means 6 or 16 therefore has the function of a lever arm.

L'extrémité restée libre de l'axe principal 7 ou 17, qui permet d'analyser la longueur et l'angle de tir, est placée dans le domaine d'action d'un capteur 8, qui selon un mode de réalisation peut être sensible aux variations de champ magnétique par exemple, en se servant de l'axe mobile 7 ou 17 comme d'un noyau de fer doux mobile à l'intérieur d'une bobine dans laquelle du courant est injecté, ce qui va avoir tendance à augmenter ou diminuer les champs magnétiques en fonction de la quantité de fer doux présent à l'intérieur de la bobine.The free end of the main axis 7 or 17, which allows to analyze the length and the angle of shot, is placed in the field of action of a sensor 8, which according to a mode of realization may be sensitive to variations in magnetic field for example, using the movable axis 7 or 17 as a movable soft iron core inside a coil in which current is injected, which will tend to increase or decrease magnetic fields depending on the amount of iron soft present inside the coil.

Selon un mode préférentiel de réalisation représenté sur les figures, l'axe principal 7 ou 17 comporte, au niveau du capteur optique 8, d'une part une zone de peinture réfléchissant la lumière 14 provenant d'une source lumineuse, et d'autre part une zone de peinture absorbant ladite lumière 15.According to a preferred embodiment shown in the figures, the main axis 7 or 17 comprises, at the level of the sensor optics 8, on the one hand a painting area reflecting the light 14 coming from a light source, and on the other hand a paint area absorbing said light 15.

Il existe donc un interface 18 entre les deux zones de peinture.There is therefore an interface 18 between the two zones of painting.

Cet interface 18 est formé d'une ellipse correspondant à une coupe en biais par rapport à l'axe longitudinal de l'axe mobile 7 ou 17. C'est ce que l'on voit bien aux figures 3 et 6.This interface 18 is formed by an ellipse corresponding to a bias cut from the longitudinal axis of the movable axis 7 or 17. This is clearly seen in Figures 3 and 6.

Le dispositif est donc ainsi fait que lorsque la came 6 ou 16 oscille autour de son axe fixe en translation 10 ou 20, l'axe principal mobile 7 ou 17 en translation selon F3 ou F4 ou bien F7 ou F8 et en rotation, selon F9, se déplace longitudinalement à l'intérieur de l'axe creux 11 ou 21 et son déplacement est alors proportionnel à l'angle d'oscillation selon F1 ou F2 ou bien F5 ou F6 de ladite came 6 ou 16.The device is thus thus made only when the cam 6 or 16 oscillates around its fixed axis in translation 10 or 20, the axis main mobile 7 or 17 in translation according to F3 or F4 or else F7 or F8 and in rotation, according to F9, moves longitudinally at inside the hollow axis 11 or 21 and its displacement is then proportional to the oscillation angle according to F1 or F2 or F5 or F6 of said cam 6 or 16.

Bien entendu, le capteur optique ou la cellule photo-électrique 8 est placé en regard de la partie de l'axe principal 7 ou 17 qui porte les zones de peinture 14 et 15 et est sensiblement centré par rapport à celles-ci 14 et 15.Of course, the optical sensor or the photoelectric cell 8 is placed opposite the part of the main axis 7 or 17 which carries the paint zones 14 and 15 and is substantially centered with respect to these 14 and 15.

La présence d'une diode émissive et d'une cellule 8, apte à capter la lumière reçue et réfléchie par les zones 14 et 15 situées en regard de la diode et de la cellule 8, va permettre de déterminer les durées et le nombre de passages au niveau de chaque zone de peinture réfléchissante 14 ou absorbante 15.The presence of an emitting diode and a cell 8, capable of capture the light received and reflected by zones 14 and 15 located next to the diode and cell 8, will allow determine the durations and the number of passages at the level of each zone of reflective 14 or absorbent 15 paint.

Lorsque la balle 2 a été frappée, celle-ci entraíne la came 6 ou 16, la noix creuse 12 ou 22 et l'axe principal 7 ou 17 en rotation.When the ball 2 has been hit, it drives the cam 6 or 16, the hollow nut 12 or 22 and the main axis 7 or 17 in rotation.

Si la rotation de la balle se fait dans un plan perpendiculaire à l'axe 7 ou 17, la cellule photo-électrique 8 va suivre la ligne A des figures 9 et 10. Le temps de passage de la zone noire devant ladite photo-électrique sera égal au temps de passage de la zone réfléchissante. Dans ce cas, la cellule délivrera un signal alternatif en forme de créneau de rapport cyclique sensiblement égal à un.If the ball is rotated in a plane perpendicular to axis 7 or 17, the photocell 8 goes follow line A of figures 9 and 10. The passage time of the black area in front of said photoelectric will be equal to the time of passage of the reflective zone. In this case, the cell will deliver an alternating signal in the form of a report slot cyclic substantially equal to one.

Si la rotation de la balle se fait dans un plan vertical faisant un angle avec le plan perpendiculaire à l'axe de rotation 11, la cellule 8 va suivre la ligne B de forme sinusoïdale qui croise la limite entre les zones noires et réfléchissantes en deux points. Dans ce cas, les flancs de montée et de descente se déplaceront et le rapport cyclique ne sera donc plus le même. Il sera représentatif de l'inclinaison du plan de rotation de la balle.If the ball is rotated in a vertical plane making an angle with the plane perpendicular to the axis of rotation 11, cell 8 will follow the sinusoidal line B which crosses the boundary between the black and reflective areas in half points. In this case, the rising and falling sides are will shift and the duty cycle will no longer be the same. he will be representative of the inclination of the plane of rotation of the ball.

Si la balle se déplace dans un plan incliné mais perpendiculaire au plan des figures 3 ou 6, la cellule 8 va suivre alors la ligne C. Les points d'intersection seront déplacés mais le rapport cyclique restera égal à un.If the ball moves in an inclined plane but perpendicular to the plane of Figures 3 or 6, cell 8 will follow then line C. The points of intersection will be moved but the duty cycle will remain equal to one.

Une mesure de cette dernière inclinaison est possible en mettant un autre ensemble photo-électrique regardant toujours l'axe principal mobile 7 ou 17, mais décalé de 90° par rapport au premier capteur 8.A measurement of this latter inclination is possible in putting another photo-electric set still looking the main movable axis 7 or 17, but offset by 90 ° relative to the first sensor 8.

Le signal issu de la cellule photo-électrique 8 est envoyé à un circuit de mise en forme, de type déclencheur 23 et dont le signal de sortie 34 est envoyé d'une part à un séquenceur 24 et d'autre part à un intégrateur 25.The signal from the photoelectric cell 8 is sent to a shaping circuit, of trigger type 23 and whose output signal 34 is sent on the one hand to a sequencer 24 and on the other hand to an integrator 25.

Le séquenceur 24 élabore des signaux de commande pour les différents circuits de l'électronique. Ces signaux sortent sur des sorties 38, 39, 40 et 44.The sequencer 24 generates control signals for the different electronics circuits. These signals come out on outputs 38, 39, 40 and 44.

Un intégrateur 26 reçoit une tension de référence 31. Il est déclenché à un temps TO par la sortie 38 du séquenceur 24 lors du premier front de montée du signal 34, issu du déclencheur 23. Il intègre la tension de référence jusqu'à un temps T1 déclenché par le front de montée suivant du signal 34, donc pendant la durée d'une période entière du signal d'entrée, c'est-à-dire pendant un tour complet de la balle 2, appelé par la suite tour de référence.An integrator 26 receives a reference voltage 31. It is triggered at a time TO by the output 38 of the sequencer 24 during the first rising edge of signal 34, from trigger 23. It integrates the reference voltage up to a time T1 triggered by the next rising edge of signal 34, therefore for the duration of an entire period of the input signal, i.e. during a full turn of ball 2, hereinafter called the reference turn.

A l'issue de ce tour, sa tension de sortie 35 est proportionnelle à sa durée. Ce signal 35 est envoyé à un autre intégrateur 27 qui est déclenché par la sortie 44 du séquenceur 24 à la fin du tour de référence, au temps T1.At the end of this round, its output voltage 35 is proportional to its duration. This signal 35 is sent to another integrator 27 which is triggered by output 44 of the sequencer 24 at the end of the reference lap, at time T1.

La sortie 36 de cet intégrateur va varier d'autant plus vite que sa tension d'entrée 35 sera grande et donc que la durée du tour de référence aura été longue. Cette sortie est envoyée à un comparateur 30 qui la compare à une tension de référence. Lorsque cette tension atteint la tension de référence, à un temps T2, le comparateur 30 envoie un signal de commande 37 au séquenceur 24. L'intervalle T2-T1 est d'autant plus court que la tension d'entrée de l'intégrateur 27 est grande et donc que le tour de référence a été long. Ce temps est donc proportionnel à la vitesse de la balle lors du tir.The output 36 of this integrator will vary all the more quickly that its input voltage 35 will be large and therefore that the duration of the reference lap will have been long. This output is sent to a comparator 30 which compares it to a reference voltage. When this voltage reaches the reference voltage, at a time T2, the comparator 30 sends a control signal 37 to sequencer 24. The interval T2-T1 is shorter the more the input voltage of the integrator 27 is large and therefore that the reference turn has been long. This time is therefore proportional to the speed of the bullet when fired.

Le séquenceur 24 commande également, par sa sortie 40, deux intégrateurs successifs 28 et 29, pendant l'intervalle T2-T1. L'intégrateur 28 reçoit la tension de référence 31 qu'il intègre donc pendant l'intervalle de temps T2-T1. Sa tension de sortie, au temps T2, est proportionnelle à cet intervalle T2-T1.The sequencer 24 also controls, via its output 40, two successive integrators 28 and 29, during the interval T2-T1. The integrator 28 receives the reference voltage 31 which it integrates therefore during the time interval T2-T1. Its output voltage, at time T2, is proportional to this interval T2-T1.

L'intégrateur 29 intègre la tension de sortie 41 de l'intégrateur 28 pendant le même intervalle de temps T2-T1. Sa tension de sortie 42, au temps T2, sera donc proportionnelle au carré de l'intervalle T2-T1, et par conséquent proportionnelle au carré de la vitesse de la balle 2 lors du tir. Etant donné que la distance parcourue par la balle 2 est elle-même proportionnelle au carré de la vitesse initiale de la balle 2, la tension de sortie 42 de l'intégrateur 29 est représentative de la distance parcourue. Elle peut être envoyée à un module de mise à l'échelle et d'affichage 32.The integrator 29 integrates the output voltage 41 of the integrator 28 during the same time interval T2-T1. Her output voltage 42, at time T2, will therefore be proportional to square of the interval T2-T1, and therefore proportional to the square of bullet speed 2 when fired. Since the distance traveled by ball 2 is itself proportional squared the initial speed of ball 2, the tension of output 42 of integrator 29 is representative of the distance traveled. It can be sent to a scaling module and display 32.

Le calcul de l'angle de tir est fait par un intégrateur 25 qui reçoit d'une part les créneaux 34 issus du déclencheur 23 et d'autre part la tension de référence 31. Il est commandé par la sortie 39 du séquenceur 24. Celui-ci commande cet intégrateur 25 pendant un temps prédéterminé arrondi à un nombre entier de période. Lorsque le signal issu du déclencheur 23 est haut, l'intégrateur intègre la tension de référence 31 dans un sens et lorsque le même signal est bas, ledit intégrateur intègre ladite tension de référence dans l'autre sens. Lorsque le rapport cyclique du signal 34 est égal à 1, le résultat de cette intégration alternative est nulle ; lorsque le rapport cyclique est différent de 1, le résultat est proportionnel à l'écart de ce rapport cyclique. La sortie 43 de cet intégrateur 25 donne donc, avec le signe correspondant, une tension proportionnelle à l'angle de tir. Cette tension est envoyée au module de mise à l'échelle et d'affichage 32.The calculation of the firing angle is done by an integrator 25 which receives on the one hand the slots 34 originating from the trigger 23 and on the other hand the reference voltage 31. It is controlled by the output 39 of sequencer 24. This controls this integrator 25 for a predetermined time rounded to an integer of period. When the signal from trigger 23 is high, the integrator integrates the reference voltage 31 in one direction and when the same signal is low, said integrator integrates said reference voltage in the other direction. When the report cyclic of signal 34 is equal to 1, the result of this alternative integration is zero; when the duty cycle is different from 1, the result is proportional to the deviation of this cyclical report. The output 43 of this integrator 25 therefore gives, with the corresponding sign, a voltage proportional to the angle shooting. This voltage is sent to the scaling module and display 32.

Selon un mode préférentiel de réalisation, le signal transmis par les capteurs est mis en forme pour pouvoir être analysé par un microprocesseur et permettre l'affichage sur un écran, d'une part de la distance du tir et d'autre part de la distance entre le point de chute et la perpendiculaire issue de la trajectoire de référence passant par ledit point de chute.According to a preferred embodiment, the transmitted signal by the sensors is shaped to be able to be analyzed by a microprocessor and allow the display on a screen of a part of the distance of the shot and the other part of the distance between the drop point and the perpendicular from the trajectory of reference passing through said drop point.

Le signal issu de la cellule photo-électrique 8 est envoyé à un circuit de mise en forme aux normes d'amplitude et de forme des signaux électriques (TTL), puis introduit vers l'entrée de capture de front du signal du microprocesseur. Le microprocesseur mesure de manière précise, comme on le voit bien sur la figure 10 :

  • d'une part T1, le temps écoulé à partir du premier front descendant t0 qu'il rencontre jusqu'au front montant tl suivant,
  • d'autre part T2, le temps écoulé à partir du premier front descendant t0 jusqu'au front descendant t2 suivant.
The signal from the photoelectric cell 8 is sent to a shaping circuit with amplitude and shape standards for electrical signals (TTL), then introduced to the front capture input of the microprocessor signal. The microprocessor measures precisely, as can be seen in FIG. 10:
  • on the one hand T1, the time elapsed from the first falling edge t0 that it meets until the next rising edge tl,
  • on the other hand T2, the time elapsed from the first falling edge t0 to the next falling edge t2.

Le temps T2 est la période du signal et est inversement proportionnel à la vitesse de la balle.Time T2 is the signal period and is inversely proportional to the speed of the ball.

Le rapport T1/T2 est représentatif de l'angle du plan de rotation de la balle par rapport à la verticale. The T1 / T2 ratio is representative of the angle of the plane of rotation of the ball with respect to the vertical.

REFERENCESREFERENCES

  • 1. Dispositif d'entraínement au golf1. Golf training device
  • 2. Balle de golf2. Golf ball
  • 3. Potence3. Stem
  • 4. Branche horizontale de la potence 34. Horizontal branch of the jib 3
  • 5. Câble de suspension de la balle 25. Bale suspension cable 2
  • 6. Moyen de liaison ou came6. Connection means or cam
  • 7. Axe principal mobile en translation et en rotation7. Main axis movable in translation and in rotation
  • 8. Capteurs optiques ou magnétiques ou cellules photo-électriques8. Optical or magnetic sensors or photoelectric cells
  • 9. Premier axe d'articulation9. First axis of articulation
  • 10. Second axe d'articulation10. Second axis of articulation
  • 11. Axe creux renfermant l'axe principal 711. Hollow axis containing the main axis 7
  • 12. Noix creuse solidaire de l'axe creux 1112. Hollow nut secured to the hollow axis 11
  • 13. Socle du dispositif 113. Device base 1
  • 14. Zone de peinture réfléchissant la lumière14. Light reflecting paint area
  • 15. Zone de peinture absorbant la lumière15. Light absorbing paint area
  • 16. Moyen de liaison ou came16. Connection means or cam
  • 17. Axe principal mobile en translation et en rotation17. Main axis movable in translation and in rotation
  • 18. Interface entre les deux zones de peinture 14 et 1518. Interface between the two paint zones 14 and 15
  • 19. Premier axe d'articulation19. First axis of articulation
  • 20. Second axe d'articulation20. Second axis of articulation
  • 21. Axe creux renfermant l'axe principal 1721. Hollow axis containing the main axis 17
  • 22. Noix creuse solidaire de l'axe creux 2122. Hollow nut secured to the hollow axis 21
  • 23. Déclencheur23. Trigger
  • 24. Séquenceur24. Sequencer
  • 25,26,27,28 et 29. Intégrateurs25,26,27,28 and 29. Integrators
  • 30. Comparateur30. Comparator
  • 31. Tension de référence31. Reference voltage
  • 32. Ecran d'affichage32. Display screen
  • 33. Paliers33. Bearings
  • 34. Signal ou tension de sortie du déclencheur 2334. Trigger output signal or voltage 23
  • 35, 36, 41, 42 et 43. Signal ou tension de sortie des intégrateurs 25 à 2935, 36, 41, 42 and 43. Integrator output signal or voltage 25 to 29
  • 37. Signal ou tension de sortie du comparateur 30 37. Comparator output signal or voltage 30
  • 38, 39, 40 et 44. Signaux ou tensions de sortie du séquenceur 24 45. Golfeurs38, 39, 40 and 44. Sequencer output signals or voltages 24 45. Golfers
  • 46. Trajectoire de référence représentée sur le socle 1346. Reference trajectory represented on the base 13
  • A. Ligne suivie par le capteur 8, lorsque le plan de rotation de la balle 2 n'est pas déviéA. Line followed by sensor 8, when the plane of rotation of ball 2 is not deflected
  • B. Ligne suivie par le capteur 8, lorsque le plan de rotation de la balle 2 est incliné à droite ou à gaucheB. Line followed by sensor 8, when the plane of rotation of ball 2 is tilted right or left
  • C. Ligne suivie par le capteur 8, lorsque le plan de rotation de la balle 2 est incliné à droite et à gauche tout en coupant la trajectoire non déviée en deux points correspondant aux deux points de l'interface 18 qui sont centrés par rapport audit capteur 8.C. Line followed by sensor 8, when the plane of rotation of ball 2 is tilted right and left while cutting the trajectory not deviated at two points corresponding to the two interface points 18 which are centered with respect to said sensor 8.
  • F1. Pivotement du moyen de liaison 6 vers la gaucheF1. Swiveling connecting means 6 to the left
  • F2. Pivotement du moyen de liaison 6 vers la droiteF2. Pivoting the connecting means 6 to the right
  • F3. Translation de l'axe principal 7 vers la gauche due au pivotement F1F3. Translation of main axis 7 to the left due to pivoting F1
  • F4. Translation de l'axe principal 7 vers la droite due au pivotement F2F4. Translation of main axis 7 to the right due to pivot F2
  • F5. Pivotement du moyen de liaison 16 vers la droiteF5. Pivoting the connecting means 16 to the right
  • F6. Pivotement du moyen de liaison 16 vers la gaucheF6. Pivoting the connecting means 16 to the left
  • F7. Translation de l'axe principal 17 vers la gauche due au pivotement F5F7. Main axis 17 moves to the left due to pivot F5
  • F8. Translation de l'axe principal 17 vers la droite due au pivotement F6F8. Translation of main axis 17 to the right due to pivot F6
  • F9. Mouvement de rotation de l'axe principal 17F9. Main axis rotational movement 17

    • Claims (11)

    1. Training device (1) for golfers designed to measure and analyze the stroke onto a ball (2), the said device (1) consisting of:
      a vertical post (3) with a horizontal arm (4), the free end of which is equipped with a cable (5) suspended so as to enable rotation thereof and at the lower end of which is attached a golf ball (2), at ground level when the device (1) is at rest, the arm (4) housing a rotary and translatory mobile main shaft (7 or 17), according to the distance and the angle of striking,
      connecting means (6 or 16) between the upper end of the cable (5) and the main shaft (7 or 17) characterized in that
      the connecting means (6 or 16) is a cam (6 or 16) cooperating with the rotary and translatory mobile main shaft (7 or 17) so that any movement of the said connecting means (6 or 16) in its plane, on start of rotation of the assembly, leads to translatory movement of the said rotary and translatory mobile main shaft (7 or 17), the said connecting means (6 or 16) transmitting proportionally to the mobile main shaft (7 or 17) the rotational speed of the ball (2) around the said mobile main shaft (7 or 17) and its striking angle, and
      that one or a plurality of sensors (8) transmit data to means which analyze the rotational speed of the shaft in order to determine the driving distance and transversal movement of the said mobile shaft (7 or 17) and thereby determine the drive angle and/or distance between the point of landing of the ball (2) and the reference trajectory (46).
    2. Training device as per claim 1, characterized in that the connecting means (6 or 16) cooperates with the rotary and translatory mobile main shaft (7 or 17) by the way of:
      a first hinge pin (9 or 19) solidly fitted to and perpendicular to the said main shaft (7 or 17), around which the connecting means (6 or 16) is able to pivot in a plane formed by the main shaft (7 or 17) and the suspended cable (5), and
      a second hinge pin (10 or 20) parallel to the first hinge pin (9 or 19) which is mobile in rotation but fixed in translation, so that any movement of the said connecting means (6 or 16) in its plane on start of rotation of the assembly leads to the translatory displacement of the said mobile main shaft (7 or 17) in rotation and in translation.
    3. Training device as per claim 2, characterized in that the first hinge pin (9 or 19) is placed above the second hinge pin (10 or 20).
    4. Training device as per claim 2, characterized in that the first hinge pin (9 or 19) is placed below the second hinge pin (10 or 20).
    5. Training device according to any one of claims 1 or 2 characterized in that
      the rotary and translatory mobile main shaft (7 or 17) is coaxially and partially enclosed in a hollow shaft (11 or 21), and
      the connecting means (6 or 16) and the end of the mobile shaft (7 or 17), which cooperates with the said connecting means (6 or 16), are positioned inside a hollow hinge yoke (12 or 22), the hollow shaft (11 or 21) and the hollow hinge yoke (12 or 22) forming a single and same mobile rotational housing.
    6. Training device according to claims 2 and 5, characterized in that the second hinge pin (10 or 20) is solidly fitted to the hollow hinge yoke (12 or 22).
    7. Training device according to claim 1 characterized in that
      the main shaft (7 or 17) is partly enclosed in a coil and acts as a metal core, and
      the sensors are sensitive to changes in the magnetic field due to the movement of the main shaft inside the coil.
    8. Training device as per claim 1, characterized in that the main shaft (7 or 17) includes, at the optical sensor(s) (8), on the one hand a painted area reflecting the light (14) coming from a light source and on the other a painted area absorbing the said light (15).
    9. Training device as per claim 8, characterized in that the interface (18) between the two painted areas (14 and 15) is formed of an ellipse corresponding to a diagonal cross section relative to the longitudinal axis of the mobile shaft (7 or 17).
    10. Training device according to any one of claims 1, 6, 7 or 8 characterized in that the means for analyzing the data transmitted by the sensors (8) consists of:
      at least one initiator (23),
      at least one sequencer (24),
      at least one integrator (25, 26, 27, 28 or 29) and
      at least one comparator (30),
      which cooperate to display on a screen (32) on the one hand the driving distance and on the other the distance between the point of landing and the perpendicular drawn from the initial trajectory passing through the said point of landing.
    11. Training device according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 characterized in that it includes a base (13).
    EP95480056A 1994-05-17 1995-05-17 Training device with stroke analysis for golfers Expired - Lifetime EP0682958B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9406230 1994-05-17
    FR9406230A FR2720006B1 (en) 1994-05-17 1994-05-17 Training device for golfers with analysis of each strike.

    Publications (2)

    Publication Number Publication Date
    EP0682958A1 EP0682958A1 (en) 1995-11-22
    EP0682958B1 true EP0682958B1 (en) 2000-03-29

    Family

    ID=9463427

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95480056A Expired - Lifetime EP0682958B1 (en) 1994-05-17 1995-05-17 Training device with stroke analysis for golfers

    Country Status (5)

    Country Link
    EP (1) EP0682958B1 (en)
    AT (1) ATE191154T1 (en)
    DE (1) DE69515925T2 (en)
    ES (1) ES2146731T3 (en)
    FR (1) FR2720006B1 (en)

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2812208B1 (en) 2000-07-27 2002-12-20 Raymond Denance GOLF PRACTICE TRAINING DEVICE AND RELATED METHOD

    Family Cites Families (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB687402A (en) * 1949-01-05 1953-02-11 John Dudley Wells Gregg A practice and indicator device for golfers
    US3472075A (en) * 1965-09-27 1969-10-14 Jess Oppenheimer Golf simulation system
    GB1325416A (en) * 1968-12-13 1973-08-01 Richmond Ernest Hall Golf practice device
    FR2598924B1 (en) 1986-05-21 1989-05-19 Eynard Roger TRAINING DEVICE FOR GOLFERS
    US4927154A (en) 1989-07-17 1990-05-22 Boyer Ralph C Golf practice device
    FR2649901B1 (en) 1989-07-20 1991-11-29 Desjardins Raymond DEVICE FOR GOLF TRAINING ON REDUCED SPACES
    US5178393A (en) 1991-11-04 1993-01-12 Dennco, Inc. Method and apparatus for measuring golf driving distance
    US5255920A (en) * 1992-07-24 1993-10-26 Mangeri John J Training device for golfers

    Also Published As

    Publication number Publication date
    ES2146731T3 (en) 2000-08-16
    FR2720006B1 (en) 1996-06-28
    FR2720006A1 (en) 1995-11-24
    DE69515925T2 (en) 2000-11-02
    EP0682958A1 (en) 1995-11-22
    ATE191154T1 (en) 2000-04-15
    DE69515925D1 (en) 2000-05-04

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