WO2004049943A1 - Systeme et procede d'analyse de mouvement anatomique - Google Patents

Systeme et procede d'analyse de mouvement anatomique Download PDF

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Publication number
WO2004049943A1
WO2004049943A1 PCT/AU2003/001574 AU0301574W WO2004049943A1 WO 2004049943 A1 WO2004049943 A1 WO 2004049943A1 AU 0301574 W AU0301574 W AU 0301574W WO 2004049943 A1 WO2004049943 A1 WO 2004049943A1
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WIPO (PCT)
Prior art keywords
signals
sensors
movement
user
swing
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PCT/AU2003/001574
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English (en)
Inventor
Robert J. Neal
Original Assignee
Neal Robert J
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Publication date
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Priority to AU2003283117A priority Critical patent/AU2003283117A1/en
Publication of WO2004049943A1 publication Critical patent/WO2004049943A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
    • A63B24/0003—Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1121—Determining geometric values, e.g. centre of rotation or angular range of movement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1121—Determining geometric values, e.g. centre of rotation or angular range of movement
    • A61B5/1122—Determining geometric values, e.g. centre of rotation or angular range of movement of movement trajectories
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1124—Determining motor skills
    • 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
    • A63B69/0002—Training appliances or apparatus for special sports for baseball
    • 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
    • A63B69/3608—Attachments on the body, e.g. for measuring, aligning, restraining
    • 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
    • A63B69/38—Training appliances or apparatus for special sports for tennis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6814—Head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6823—Trunk, e.g., chest, back, abdomen, hip
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6825—Hand
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6831—Straps, bands or harnesses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
    • A63B24/0003—Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
    • A63B24/0006—Computerised comparison for qualitative assessment of motion sequences or the course of a movement
    • A63B2024/0012—Comparing movements or motion sequences with a registered reference
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/10—Positions
    • A63B2220/13—Relative positions
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/40—Acceleration
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2225/00—Miscellaneous features of sport apparatus, devices or equipment
    • A63B2225/50—Wireless data transmission, e.g. by radio transmitters or telemetry
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2244/00—Sports without balls
    • A63B2244/22—Dancing

Definitions

  • This invention relates to the analysis and correction of anatomic motion such as golf swings; however, the invention can also be applied to the analysis of other anatomical movements such as in tennis, baseball, dance, martial arts or the like.
  • An optimal golf swing ensures maximum distance and accuracy of the trajectory of a golf ball.
  • An improper swing motion is generally the major cause of inaccuracies resulting in slicing the ball or an inability to obtain maximum distance.
  • the analysis and correction of improper swing motion is therefore vital in obtaining maximum effectiveness of a person's golf swing.
  • One such device is described in U.S. Pat. No. 5,984,798 to Gilmour (the '798 patent).
  • the '798 patent describes a golf swing apparatus including a guide having a number of sensors located at spaced locations in the guide.
  • a processor in a computer receives sensor information as the golf club passes by the sensors.
  • the processor then converts the sensor readings into a signal indicative of the golf swing tempo and is graphically displayed for viewing by the golfer.
  • a drawback of the apparatus of the '798 patent is that the graphical display provides only a visual display of the golfer's golf swing pattern and tempo. It does not provide professional analysis or comparison with an ideal golf swing or comprehensive reporting of the areas of deficiency of the golf swing.
  • Wandel et al. Another prior art method and device is described in International Patent Application WO 00/53272 to Wandel et al. (Wandel et al.). Wandel et al. describe a method and device for diagnosing a golf swing by measuring and analysing movement relating to a golfer's vertebral column during a golf swing.
  • Ultrasonic sensors are positioned along the vertebral column of a golfer and detect movement three-dimensionally during a golf swing.
  • a data processor processes the measurement values and compares them with stored values of golf swings of other golfers. The result is displayed on a display device, viewable by the golfer to check the quality of their golf swing.
  • a drawback of the method of Wandel et al. is that the display device provides only a visual display of the golfer's golf swing pattern and tempo in comparison with other stored information. It also does not provide professional, interpretive analysis and comprehensive reporting of the areas of deficiency of the golf swing and of how such deficiencies can be corrected.
  • the present invention is a system for analysing anatomic movement, comprising: a field generator for generating a field that surrounds at least part of the body of a user of said system; one or more sensors attachable to a user of said system, said sensors capable of detecting movement through said field and of outputting signals related to said movement; a motion capture unit for receiving said signals; and an analysis unit for analysing said signals.
  • the field generator may be a magnetic field generator.
  • the one or more sensors may detect a change in said magnetic field when said one or more sensors move relative to said field.
  • the motion capture unit and said analysis unit may be comprised in a personal computer.
  • the system may further comprise a harness connected to said one or more sensors, said harness being wearable by a user of said system.
  • the system may further comprise wires connected at a first end to said harness and at a second end to said motion capture unit, whereby said signals are transmitted from said one or more sensors to said motion capture unit.
  • the wires may be directable along the middle of a user's back so as to present minimal interference with movements of the user.
  • At least one of said sensors may be locatable beneath a user's glove on the dorsal side of a user's hand.
  • the present invention may be a system for analysing a golf swing, comprising: one or more sensors attachable to a golfer's head, hand, pelvis, and upper torso, said sensors capable of detecting movement and of outputting signals related to said movement; a motion capture unit for receiving said signals; and an analysis and reporting unit for analysing said signals and for reporting text and graphical data related to said signals.
  • the present invention may be a method for analysing anatomical movement, said method comprising the steps of: locating sensors on the body of a user, said sensors capable of detecting movement; recording test signals from said sensors as the user executes a defined movement; comparing said test signals with idealized signals; and calculating instructions concerning how said user could improve his or her defined movement so that said test signals would more closely resemble said idealized signals.
  • the method may further include generating a report concerning how said user could improve his or her defined movement so that said test signals more closely resemble said idealized signals.
  • the report may include graphical and tabular representations of said test signals and said idealized signals.
  • the defined movement may include a maximum frequency, and the test signals may be sampled at a rate that is at least twice as fast as said maximum frequency.
  • FIG 1 A is a schematic diagram showing a system for capturing data associated with a golf swing according to one embodiment of the present invention
  • FIG IB is a schematic diagram showing the placement of a sensor on the dorsal surface of a hand according to one embodiment of the present invention.
  • FIG 2 is a process flow chart of a first step of a golf swing analysis method in accordance with the invention.
  • FIG 3 is a process flow chart of a second step of a golf swing analysis method in accordance with the invention.
  • FIG 4 is a process flow chart of a third step of a golf swing analysis method in accordance with the invention.
  • FIGS 5 A and 5B provide illustrative examples of the elements of an analysis report produced according to the process of FIG 4.
  • the invention will be described with reference to a system and method for analysing golf swings.
  • the invention could also be used to analyse other anatomical movements such as in tennis, baseball, dance, martial arts or the like.
  • FIG 1 a golf analysis system 1 in accordance with an embodiment of the present invention.
  • the system comprises a plurality of sensors 2 attached to a golfer 3 by a harness 4.
  • a field generator 5 produces a field in the area of the golfer 3.
  • the field generator is connected to a motion capture unit 6, which processes and controls the field generation intensity.
  • the sensors 2 are connected to the motion capture unit via cables 8. Note that in the embodiment shown in FIG 1 the cables 8 are routed along the middle of a golfer's back so as to present minimal interference with the movement of the golfer 3.
  • the field generator 5 is a magnetic field generator or another suitable field generator such as an ultrasonic field generator.
  • the magnetic field generator 5 can be fixed to a stand to locate the generator at a required height and location relative to the golfer 3. Examples of such a field generator are the Liberty (registered trademark) or Fastrak (registered trademark) systems produced by Polhemus Inc.
  • Sensors 2 sense a current produced in the presence of the magnetic field. As the golfer 3 swings the golf club, the current in the sensors 2 will modulate as the magnetic field fluxes. This current is transmitted to the motion capture unit 6 for initial processing. The current provides sufficient information to allow the position and orientation of the sensors 2 to be determined. The current serves to locate the sensors 2 in space so that real-time motion is measured by taking repeated samples of the signals from each sensor 2. Those skilled in the art will recognize that other types of position locating sensors 2 may also be used within the scope of the present invention. For example, accelerometers or wireless position sensors 2 could also be used to measure a golfer's movement.
  • FIG IB there is a schematic diagram showing the placement of a sensor 2 on the dorsal surface of a golfer' s hand according to one embodiment of the present invention.
  • the sensor 2 is positioned beneath the golfer's glove 14 so as to provide a secure attachment of the sensor 2 while not interfering with the golfer's swing.
  • the motion capture unit 6 may be one of various types of conventional motion capture units, such as those produced by Polhemus, Inc.
  • the motion capture unit 6 processes the sensor signals to capture the movements of the golfer 3 during a golf swing.
  • the capture unit 6 typically can be tuned to sample the signals generated by the sensors 2 at varying sampling frequencies.
  • the sampled test signals are transmitted to a computer 7 and stored in the form of an ASCII file.
  • the computer 7 has preloaded software, such as the 3D Golf (registered trademark) software produced by Skill Technologies, Inc., which processes the data to display a virtual image of the golfer 3.
  • An analysis and reporting unit 9 including a computer means, evaluates, extracts and interprets the ASCII data so that an analysis report of the golfer's golf swing can be produced.
  • FIG 1A shows the location of sensors 2 for the long game.
  • the sensors 2 are attached to the following body segments:
  • pelvis at the level of the sacrum/L5 vertebra
  • upper torso at the level of the 7 th cervical vertebra
  • the sensors 2 may be located as follows: 1. head;
  • the raw ASCII data including the test signals are captured and recorded on a disk or other suitable recording media in the analysis and reporting unit 9.
  • the raw data points may include up to 5000 points per swing. Typically, five or six swings with each of two clubs, such as a 5-iron and a driver, are captured.
  • the raw data consist of the augmented direction cosine matrix for each of the sensors 2 at each sampled point in time during the swing, although alternative forms (e.g., quaternions) of representing these data could also be used. In one particular embodiment, each sensor 2 is sampled at a rate of 30 times per second. It should be noted however that other sample rates could be used, as would be known to a person skilled in the art.
  • a process for evaluating golf swings and providing a report using the analysis and reporting unit 9 is described below.
  • the process comprises three broad methods illustrated in FIGS 2-4: pre-processing and data compaction
  • method 200 calculation of a mean swing (method 300), and report production (method 400).
  • step 201 initial information such as the number of files to be processed and the file names are input into the analysis and reporting unit 9.
  • step 202 the augmented Direction Cosine (DC) matrices for each sensor 2 are input into the analysis and reporting unit 9.
  • Any suitable mathematical computation tool such as MatLab (registered trademark), may be used to manipulate the matrices.
  • digital signal processing is performed as follows: 1. Filtering of the data using a filter such as a Butterworth 4 th order recursive filter with optimal cutoff frequency determination to eliminate noise (measurement error) from the raw data; 2. Re-sampling of the data using a sampling algorithm such as Shannon's sampling algorithm to reconstruct the signal at a rate of 120 Hz. It should be noted that other types of filters and algorithms could be used as would be known to a person skilled in the art.
  • swing parameters are calculated as follows:
  • Calculation of critical events during a golf swing including: a. Address (i.e., that instant prior to beginning the swing); b. Top of the backswing (i.e., the point when the motion "away” from the ball ends and the motion "toward” the ball begins); c. Impact (an estimate of the point in time when the club made contact with the ball); and d. Finish (that point where the body has reduced the energy of the club sufficiently that the movement can be deemed completed).
  • the ATIF Address, Top of backswing, Impact and Finish samples
  • a search is made of the data after the signal-processing step 203 to determine the top of the backswing. The criteria that must be met for this event are as listed below:
  • Hand height is within 10% of its maximum value.
  • the address position i.e., the start of the backswing
  • a backward search of the data is then undertaken, commencing from the top of the backswing and ending when the following criteria are met: 1. Y coordinate of the origin of the hand sensor is at a maximum; and
  • the Z coordinate of the hand sensor is within 5% of its minimum. Impact position is then obtained by searching forward from the top of the backswing until the Y coordinate of the hand sensor exceeds its value at address. The finish position is selected as that point in time when the pelvic rotation reaches its maximum position.
  • step 205 it is determined whether all data files for a particular club have been processed. If so, then the method 200 continues to step 206 where average values and standard deviations are determined to describe a mean "typical" swing and the variation to this mean swing. Otherwise, steps 202, 203 and 204 are repeated. Finally, at step 207, the resulting data are written to an output file.
  • the process of the present invention then continues with the method 300 concerning the calculation of a mean swing and of attribute values as illustrated in the process flow chart of FIG 3.
  • the method 300 begins by inputting the data from step 207 into a spreadsheet program such as Microsoft Excel (registered trademark).
  • step 302 macros set up within the template and which are automatically instigated, select the input data, highlight values that are outside acceptable ranges, and place the data in formatted tables.
  • step 303 the values in the tables are compared with ranges of values or known constants depicting an ideal swing including a range of acceptable deviations.
  • the test signals are compared with idealized signals. If the test data values lie outside the range of acceptable deviations, they are highlighted in red or using other suitable means for indicating a divergence from ideal.
  • the data can be categorised into three zones: an acceptable zone where the text stays black, a "be wary” zone just outside the acceptable zone and a “danger” zone in which the deviations from the acceptable zone are too great.
  • the tables are used to identify a set of attribute values that are then prioritised. These attribute values represent those areas of the golfer's swing that deviate significantly from the ideal or model swing and are areas of concern.
  • step 304 appropriate images, figures and text are generated for the priority areas and it is on the basis of these values that the swing analysis report is generated.
  • FIG 4 a process flow chart is provided illustrating the final method 400 of report production.
  • the report includes instructions concerning how a golfer could improve his or her swing so that future recorded test signals would more closely resemble the idealized signals.
  • the generated text, images and figures from step 304 above as well as tables and graphs of the attribute values are input at step 401 into a word processing tool, such as Microsoft Word (registered trademark).
  • the priority areas from the attribute values are interpreted and analysed by a qualified sports biomechanics professional. That is, prioritising those movements (positions, orientations, speeds, sequencing, etc.) that are crucial to a golfer's improvement is a key element of the present embodiment of the invention. From all the possible deviations from ideal of the 40+ variables at the various times during the swing (i.e., the attribute table of values), the key ones are identified and placed in priority order for correction or amelioration.
  • an algorithm and suitable expert system may be used to provide interpretation, analysis and reporting of a golf swing.
  • an analysis report is produced for the golfer and a separate report for their coach.
  • the golfer's report is likely to be written in a way that is readily understood by the average golfer.
  • the coach's report may include more detailed technical information, which is useful for a trained professional.
  • the reports can be delivered by any suitable means such as printed publication.
  • the reports can also be stored on electronic media such as floppy disk or CD and forwarded to the golfer.
  • the reports can be emailed or published on a dedicated web site having a password-protected area for authorised access.
  • FIGS 5 A and 5B show examples of the types of information contained in the reports.
  • the reports will generally include some illustrative images 10 depicting the golfer's movement, graphs 11 illustrating certain deviations of the golfer's swing from the ideal, and tables 12 and 13 showing various attributes and other biomechanical derivatives.
  • the reports may also include written explanation and advice on each area in need of improvement with reference to the tables and illustrations.
  • Tables 2 and 3 there are shown examples of data from golfers that are interpreted and analysed, and examples of types of recommendations made.
  • Table 3 shows a set of data for a different player, Golfer B. This person needs to work on different aspects of the swing in order to improve technique.
  • the priorities for Golfer B are as follows:
  • the present invention is therefore an anatomic motion analysis system and method that provides comprehensive analysis and reporting of anatomic motions such as golf swings.
  • anatomic motions such as golf swings.
  • the above detailed description provides a preferred exemplary embodiment only, and is not intended to limit the scope, applicability, or configuration of the present invention. Rather, the detailed description of the preferred exemplary embodiment provides those skilled in the art with an enabling description for implementing the preferred exemplary embodiment of the invention. It should be understood that various changes can be made in the function and arrangement of elements and steps without departing from the spirit and scope of the invention as set forth in the appended claims.
  • the upper torso lag is the difference between the peak rotational speed of the pelvis and upper torso.
  • the hand lag is the difference between the peak rotational speed of the upper torso and the hand speed.
  • the upper torso lag is the difference between the peak rotational speed of the pelvis and upper torso.
  • the hand lag is the difference between the peak rotational speed of the upper torso and the hand speed.

Abstract

Système (1) et procédé servant à analyser un mouvement anatomique, tel qu'un swing de golf. Ce système peut comporter un générateur de champ (5) servant à générer un champ entourant au moins une partie du corps de l'utilisateur (3) de ce système (1). Un ou plusieurs capteurs (23) peuvent être fixés à l'utilisateur (3) du système (1). Ces capteurs (2) sont à même de détecter le mouvement à l'intérieur du champ et de produire des signaux associés à ce mouvement. Ce système (1) comprend également une unité de saisie de mouvement (6) servant à recevoir les signaux et une unité d'analyse (9) servant à analyser ces signaux. Ce procédé peut également consister à enregistrer des signaux de contrôle provenant des capteurs (2) simultanément à l'exécution d'un mouvement défini par l'utilisateur (3). Ces signaux de contrôle sont ensuite comparés à des signaux idéalisés. Ce procédé consiste enfin à calculer le niveau que l'utilisateur (3) peut atteindre afin d'améliorer son mouvement défini, de sorte que les signaux de contrôle puissent plus étroitement ressembler aux signaux idéalisés.
PCT/AU2003/001574 2002-12-02 2003-11-26 Systeme et procede d'analyse de mouvement anatomique WO2004049943A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003283117A AU2003283117A1 (en) 2002-12-02 2003-11-26 Anatomic motion analysis system and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2002953017 2002-12-02
AU2002953017A AU2002953017A0 (en) 2002-12-02 2002-12-02 Golf swing analysis system and method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8944939B2 (en) 2012-02-07 2015-02-03 University of Pittsburgh—of the Commonwealth System of Higher Education Inertial measurement of sports motion
US9907997B2 (en) 2006-01-09 2018-03-06 Nike, Inc. Apparatus, systems, and methods for gathering and processing biometric and biomechanical data
US11944428B2 (en) 2015-11-30 2024-04-02 Nike, Inc. Apparel with ultrasonic position sensing and haptic feedback for activities

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