WO2014123419A1 - Procédé et dispositif de suivi de mouvement - Google Patents

Procédé et dispositif de suivi de mouvement Download PDF

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Publication number
WO2014123419A1
WO2014123419A1 PCT/NL2014/050076 NL2014050076W WO2014123419A1 WO 2014123419 A1 WO2014123419 A1 WO 2014123419A1 NL 2014050076 W NL2014050076 W NL 2014050076W WO 2014123419 A1 WO2014123419 A1 WO 2014123419A1
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WO
WIPO (PCT)
Prior art keywords
trajectories
playing
player
swing
body part
Prior art date
Application number
PCT/NL2014/050076
Other languages
English (en)
Inventor
Paulus Cornelius Helder
Original Assignee
H.T. Technology B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by H.T. Technology B.V. filed Critical H.T. Technology B.V.
Publication of WO2014123419A1 publication Critical patent/WO2014123419A1/fr

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B19/00—Teaching not covered by other main groups of this subclass
    • G09B19/003—Repetitive work cycles; Sequence of movements
    • G09B19/0038—Sports

Definitions

  • the invention relates to a method and device for analyzing a swing of a sporting tool
  • the sporting tool can be, for example, a golf club, a tennis racket or baseball bat.
  • a player of golf can exercise his or her swing of the golf club in 3D space and can have another person look at the golf swing when the player is playing the ball to analyze his swing.
  • WO 2004/056425 discloses an orientation and position tracking system in three-dimensional space and over a period of time utilizing multiple inertial and other sensors for determining motion parameters to measure orientation and position of the sporting tool or swing tool.
  • the sensors for example vibrational and angular velocity sensors, generate signals characterizing the motion of the swing tool.
  • the sensors can be placed, for example, on the handle, grip or head of a golf club.
  • the information is received by a data acquisition system and processed by a microcontroller.
  • the data is then
  • the information can then be displayed and presented to the user through a variety of means including audio, visual, and tactile.
  • a drawback of the known device is that it is difficult for a user to analyze the swings of a player during a match on the golf course, because the sensors may affect the characteristics, for example balance and/or weight of the golf club.
  • a further drawback can be that the data can only be collected on certain positions on the golf course, for example a driving range.
  • a further drawback can be that the sensors are provided in a special golf club which is not representative for a standard golf club.
  • a further drawback is that it is difficult to analyze the swings without having feedback from a pro or coach based on the displayed swings.
  • US5111410 discloses a motion diagnosis system which picks up images of a subject and analyzes them, and is characterized by measuring address data at points of the images thus picked up according to a trigger condition set in advance, displaying the result of the measurement in graphic images or stored images or in comparison with reference images, outputting the evaluation of such comparison to thereby enable measurement under flexible trigger conditions and analyzing the motions of the subject based on quantitative data in a manner easily understandable by the viewers and simple operation.
  • US20070135225 discloses a sport movement analyzer and training device and method, in real time, detect, analyze, correct and re-create sport movements of a user.
  • An analyzer is secured to a user's wrist engaged in sport movements.
  • a sensing unit in the analyzer provides signals representative of the movement of the wrist at various swing positions along a swing path during a sport movement.
  • a processor in the analyzer processes the signals to measure various parameters descriptive of a sport performance of the user at the swing positions along the swing path.
  • Stored programs in the analyzer service the processor in processing the signals representative of the sport performance for display to the user.
  • a history of past sport performances by the user is stored for comparison purposes with current sport performances.
  • this object is achieved in a method for analyzing a swing of a sporting tool by a player comprising:
  • a number of trajectories of the body part during respective learning swings can be determined from the sensor data and recorded.
  • the recorded trajectories of one or more body parts can be displayed on a display device.
  • a player together with a professional player or a coach can review selected trajectories and select one of the displayed and recorded trajectories of the learning swings as the reference trajectory of the body part.
  • This reference trajectory of the one or more body parts may correspond to a near perfect or perfect swing of the sporting tool.
  • the sporting tool can be for example a golf club, tennis racket, baseball bat or hockey stick.
  • the invention is based on the insight that speed and power in a swing, for example with golf, tennis or baseball, is the resultant of biomechanics of the body.
  • a swing is mainly generated from the arms. Swing faults are often the result of an incorrect coordination of movements of the involved body parts.
  • the kinetic chain of motion instigated by the legs and the resulting ground reaction force is transferred through the legs into pelvis, followed by the body core, shoulders, arms and finally the swing tool.
  • a perfect coordination of the kinetic chain prevents swing faults.
  • a better coordination of motion will result in an improved kinetic chain and thus higher and more efficient swing speed.
  • the further steps of the method record the playing trajectories of the body parts played during playing swings in the game.
  • one or more recorded playing trajectories of the played swings and the reference trajectory can be displayed on a display.
  • the displayed playing trajectories and the reference trajectory can be analyzed by the player and/or his coach.
  • the method further comprises determining a difference between the selected playing trajectories and the reference trajectory; displaying the difference on the display device.
  • the difference between one of the recorded playing trajectories and the reference trajectory can be determined by a projection of respectively the reference trajectory and the selected playing trajectory on a reference plane and determine a quantitative measure from the difference of these projections.
  • the body part comprises a left and right shoulder
  • the method further comprising positioning of a first and second one of the sensors at the respective shoulders of the player.
  • positioning the first and second sensor on the shoulders parameters of a line between the left and right shoulder can be determined and a reference plane can be determined.
  • the body part further comprises a left and right hips
  • the method further comprises positioning a third and fourth one of the sensors at the respective hips of the player or a fifth or sixth one of the sensors on the knees of a the player.
  • the movement information of the hips and/ or knees can provide additional trajectories for displaying coordinated movements of the kinetic chain.
  • the method comprises positioning a seventh sensor at a proximal end of the sporting tool. In a still further embodiment, the method further comprises positioning an eight sensor at a distal end of the sporting tool. Positioning of the seventh and/or eighth sensor on the proximal and distal ends of the playing tool enables determining of the positioning and the movement of the playing tool.
  • the method comprises determining a reference backswing or reference downswing plane from the determined positions of the sensors, and
  • this reference backswing or downswing can be determined in a golf game using a plane defined by the shoulder line and the club head, when the club head is in a downward position near the ball to be hit.
  • this object is achieved by a device for analyzing a swing of a sporting tool by a player comprising
  • a sensor for determining a position and an orientation of the body part and to be attached to the body part forming a part of a kinetic chain between a fixed point and the sporting tool
  • processor connected with the sensor, the processor being arranged to
  • Id receiving an input from the input device for selecting one of the displayed trajectories as a reference trajectory
  • the sensors comprise 3D accelerometers.
  • An example of such device is the WISP sensor as marketed by INTEL such a sensor comprises near field RF communication a microcontroller and wireless power supply.
  • the device comprises an RF communication device arranged to communicate between the controller and the sensor. RF communication between the sensors and the device enables freedom of movement to the player.
  • Fig. 1 shows schematically an embodiment of the device according to the invention
  • Fig. 2 shows diagrammatically a golf player and the sensors attached to the golf player and the golf club;
  • Fig. 3 shows a back swing plane and a downswing plane with respect to a golf player
  • Fig. 4 shows an example of a display screen showing lines representing trajectories of two sensors.
  • the invention relates to a method for analyzing a swing or motion of a sporting tool or swing tool by a player.
  • the sporting tool can be, for example, a golf club, a tennis racket, a hockey stick or a baseball bat.
  • the method can be used to improve the swings or strokes by a player with one of the mentioned sporting tools of a ball game.
  • the golf club is used as an example of a sporting tool.
  • a known method to analyze motion comprising recording a video of a golf player hitting several trial swings on a stationary position on the golf course, for example the driving range.
  • a video camera In order to take the video or pictures a video camera is positioned on a fixed reference position and several trial swings are recorded and can be played backed on a display for further analysis with a pro or coach.
  • the trajectories of the moving body parts of the player during the swing of the golf club can be recorded by a device for analyzing a swing of the player.
  • the body part of the player form a kinetic chain of movement between a fixed point, for example, the ground or green and the sporting tool.
  • the device collects and provides information on the movement of selected body part of the kinetic chain.
  • the device can be compactly built and carried in a small box by the player and/or can be connected to a portable terminal or smart phone. After the collecting the information can be displayed.
  • Fig.1 shows schematically an embodiment of the analyzing device according to the invention.
  • the device 1 comprises one or more sensors 11, 12, 13 arranged to determine a motion, position and an orientation along the trajectory of body parts of the player 7 playing the golf club 8.
  • This sensor can be, for example, an RFID comprising a 3D-accelerometer, a microprocessor and RF-communication device, such as WISP- device, as can be obtained from Intel.
  • the WISP device does not need an external power source, but collects the required power via an RF-antenna harvesting power from ambient RF fields.
  • the device further comprises a memory 3 for storage of data , an input device 4 for receiving input from the user, for example, a touch screen, mouse, keyboard or tracker ball. Furthermore, the device comprises a display device 5, for example, an LCD or OLED device for displaying information, such as the determined trajectories of the golf club 8.
  • an RF communication device 6 for communication with the WISP sensors and a processor 2 arranged to control the memory 3, the input device 4, the display device 5, the RF communication device 6 and the WISP sensors 11, 12, 13
  • the processor 2 can be in wireless connection with the WISP sensors 11, 12, 13 via the RF communication device 6.
  • Fig. 2 shows schematically a player 7 with a golf club 8 and the positions of the WISP sensors 1 1-18 attached to the player 7 and the golf club 8.
  • the sensors 1 1-16 can be attached to body parts of the player forming a kinetic chain between the ground and the golf club 8.
  • the first and second sensors 1 1, 12 can be attached to respectively to each of the shoulders of the player 7 holding the golf club 8 of which the swings should be analyzed.
  • An additional third and fourth sensors 13, 14 can be attached to respectively the left and right hips of the player.
  • a fifth and a sixth sensor 15, 16 can be attached to the knees of the player 7.
  • a seventh sensor 17 can be attached to the grip of the golf club 8 and a eighth sensor 18 can be attached to the club head of the golf club 8.
  • the processor 2 can be arranged to communicate with the sensors 1 1-18 and to receive data corresponding to accelerations in x, y, z-directions of the respective sensors.
  • the sampling rate of the sensors can be selectable in the range between 12,5 Hz and 400 Hz.
  • the range for measuring accelerations can be selectable between -2g, 2g;-4g, 4g; -8g, 8g.
  • the processor 2 is arranged to determine trajectories of the movements of the body parts and/or the golf club during swing of the player and the golf club from the received accelerations in x, y and z-directions from the sensors 1 1- 18 in a way well known to a person skilled in the art.
  • the device 1 can be provided with one or more gyroscopic devices, for example, a gyroscopic device LPY4150AL, as can be obtained from ST Microelectronics.
  • the device 1 can be furter arranged to determine the trajectories by using also the angular velocities provide bt the gyroscopic sensors.
  • a trajectory can be defined as a curved line along which a certain point of the body parts of the player 7 or the golf club 8, at which one of the sensors 1 1-18 is attached, is moving during the backswing or the downswing.
  • a point represents, for example, the grip or the club head, a point between the grip and the club head or a point on a shoulder, hip or knee of the player.
  • the device is firstly set in a learning mode for recording of the trajectories of the body parts and/or golf club during a number of respective learning swings or strokes in order to select a reference trajectory.
  • the number of learning swings can be, for example 5 or 10.
  • the recording of the trajectories in the learning mode comprises
  • Id storage of the determined trajectories of the shoulders, knees, hips and the golf club in the memory 3.
  • the player can use the device to display the trajectories on the display device 5 and analyze the displayed trajectories.
  • the displayed trajectories provide information on the kinetic chain formed by respectively the legs, the hips and the shoulders of the player 7 and the golf club.
  • a coach or golf pro selects one of the displayed trajectories as the "ideal" trajectory or the reference trajectory, which corresponds to a nearly perfect or perfect swing of the golf club 8.
  • the processor 2 receives the input from via the input device 4 and stores a sequence number
  • the player sets the device 1 into a playing mode and the player can play a game or a number of holes on the golf course.
  • the device 1 records the playing trajectories of the sensors 11-18 of respectively the shoulders, knees, hips and of the player and the golf club.
  • the recording of the trajectories in the playing mode comprises
  • the player or his coach or pro can analyze the trajectories of the performed swings.
  • the processor 2 receives an input via the input device 4 from the player corresponding to a selected one of the stored playing trajectories corresponding to one of the playing swings and retrieves the selected playing trajectory and/or the reference trajectory from the memory 3, and displays the selected playing trajectory and/or the reference trajectory on the display device 5.
  • the player can select the trajectory of one or two of the sensor 11-18 of one or more of the body parts to be stored.
  • the player can now analyze the performed playing swing and the reference swing on the display device 5 using the information of the trajectories of the respective body parts of the player 7 that form the kinetic chain of movement between the ground and the golf club 8.
  • Fig. 4 shows an example of a display screen of a display device 5 on which two lines 42, 41 are shown representing two possible trajectories of the respective sensors 13, 14 which are positioned on the hips of the player.
  • the processor 2 can determine a difference between the selected playing trajectories and the reference trajectory and can display the difference on the display device.
  • the difference between the playing trajectory corresponding with a playing swing and the reference trajectory corresponding to a reference swing can be determined, for example, by using projections of the respective trajectories of the body parts forming the kinetic chain on a reference plane.
  • the reference plane can be a reference backswing plane or reference
  • Fig. 3 shows schematically a backswing plane 20 and a downswing plane 21 with respect to a golf player 7.
  • These reference planes 20, 21 can be determined from the determined positions of the first and second sensors 11, 12 at the shoulders of the player 7 and the seventh sensor 17 of the grip of the golf club 8.
  • the reference backswing plane 20 is determined by the position of the sensors 11, 12, 17 at the top of the backswing.
  • the downswing plane is determined from the positions of these sensors 11, 12, 17 when the player 7 has turned his hips to the left to initiate the downswing.
  • the determined downswing plane or backswing plane 20, 21 can then be displayed on the display device 5 as the reference backswing plane or downswing plane.
  • the backswing plane 20 or downswing plane 21 are known per se from " Five lessons The modern fundamentals of golf, by Ben Hogan, 1985.
  • the processor can determine the projections of the respective playing trajectories of the body parts a played swing and a reference swing.
  • the display device 5 comprises a 3D display device. Such a device can display the trajectories in 3D to a viewer.
  • the processor 2 is arranged to convert the stored data of the trajectories in a 3D data stream that can be displayed via the 3D display device.

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  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Golf Clubs (AREA)

Abstract

L'invention concerne un procédé et un appareil permettant d'analyser un balancement d'un outil sportif par un joueur. Le procédé consiste à enregistrer un balancement de référence par la détermination de trajectoires d'une partie du corps du joueur, pendant le balancement d'apprentissage à l'aide de capteurs positionnés sur la partie du corps formant une partie d'une chaîne cinétique entre un point fixe et l'outil sportif; à stocker les trajectoires déterminées de la partie du corps pour les balancements d'apprentissage; à afficher les trajectoires déterminées des balancements d'apprentissage; à sélectionner l'une des trajectoires affichées en tant que trajectoire de référence; à enregistrer un balancement de jeu par la détermination des trajectoires de jeu d'une partie du corps pendant le balancement de jeu à l'aide des détecteurs; à stocker les trajectoires de jeu déterminées de la partie du corps pendant les balancements de jeu; à sélectionner l'une des trajectoires de jeu stockées; et à afficher la trajectoire de jeu sélectionnée et/ou la trajectoire de référence sur un dispositif d'affichage. L'appareil est agencé de façon à réaliser les étapes du procédé.
PCT/NL2014/050076 2013-02-07 2014-02-07 Procédé et dispositif de suivi de mouvement WO2014123419A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2010266A NL2010266C2 (en) 2013-02-07 2013-02-07 Motion tracking method and device.
NL2010266 2013-02-07

Publications (1)

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WO2014123419A1 true WO2014123419A1 (fr) 2014-08-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9563896B1 (en) 2015-11-19 2017-02-07 International Business Machines Corporation Kinetic tracking in manufacturing to predict and prevent defects
WO2022045645A1 (fr) * 2020-08-31 2022-03-03 주식회사 모아이스 Procédé, dispositif et support d'enregistrement non transitoire lisible par ordinateur pour estimer des informations se rapportant à un swing de golf

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111410A (en) 1989-06-23 1992-05-05 Kabushiki Kaisha Oh-Yoh Keisoku Kenkyusho Motion analyzing/advising system
WO2004056425A2 (fr) 2002-12-19 2004-07-08 Fortescue Corporation Procede et dispositif permettant de determiner l'orientation et la position d'un objet mobile
US20070135225A1 (en) 2005-12-12 2007-06-14 Nieminen Heikki V Sport movement analyzer and training device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111410A (en) 1989-06-23 1992-05-05 Kabushiki Kaisha Oh-Yoh Keisoku Kenkyusho Motion analyzing/advising system
WO2004056425A2 (fr) 2002-12-19 2004-07-08 Fortescue Corporation Procede et dispositif permettant de determiner l'orientation et la position d'un objet mobile
US20070135225A1 (en) 2005-12-12 2007-06-14 Nieminen Heikki V Sport movement analyzer and training device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BEN HOGAN, FIVE LESSONS THE MODERN FUNDAMENTALS OF GOLF, 1985
NEERAJ PUROHIT; RAVIKUMAR K; MAHIMA SATSANGI, POSITION DETECTION AND DIGITAL LEVEL SENSOR USING ACCELEROMETER, 5 February 2014 (2014-02-05), Retrieved from the Internet <URL:http://shukra.cedt.iisc.ernet.in/edwiki/Position_Detection_and_Digital_level_Sensor_us ing- Accelerometer>
NEERAJ PUROHIT; RAVIKUMAR K; MAHIMA SATSANGI: "POSITION DETECTION AND DIGITAL LEVEL SENSOR USING ACCELEROMETER", 13 May 2013 (2013-05-13), pages 1 - 7, XP002722639, Retrieved from the Internet <URL:ukra.cedt.iisc.ernet.in/edwiki/Position_Detection_and_Digital_level_Sensor_using_Accelerometer> [retrieved on 20140401] *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9563896B1 (en) 2015-11-19 2017-02-07 International Business Machines Corporation Kinetic tracking in manufacturing to predict and prevent defects
WO2022045645A1 (fr) * 2020-08-31 2022-03-03 주식회사 모아이스 Procédé, dispositif et support d'enregistrement non transitoire lisible par ordinateur pour estimer des informations se rapportant à un swing de golf

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