JP2004081683A - Golf swing analysis system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf swing analysis system, for visually knowing golfer's habit of golf swing by reproducing the golf swing immediately after the golf swing. <P>SOLUTION: This golf swing analysis system 10 includes: a three-dimensional position/direction measuring device 12 for obtaining the time series data of a three-dimensional position of a grip part of a golf club to a designated reference position and the time series data of the direction of the grip part to a designated reference direction in the process of golf swing; a computer 14 for creating animation data for reproducing the movement of a shaft of the golf club according to the time series data of the three-dimensional position of the grip part and the time series data of the direction of the grip part; and an image display monitor 16 for reproducing the movement of the shaft of the golf club using the animation data outputted from the computer 14. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a golf swing analysis system for analyzing a golf swing when a user swings while gripping a grip portion of a golf club.
[0002]
[Prior art]
Golfers are continually practicing in order to accurately and stabilize the flight direction of a golf ball and to achieve a smooth golf swing without a habit in order to lengthen the flight distance.
In order to assist the golfer in improving the golf swing, various apparatuses for analyzing the golf swing have been proposed.
[0003]
For example, using a magnetic signal or an optical signal, or using an acceleration sensor to measure the head speed at impact of a golf club to analyze a golf swing, or a golf club head face using a plurality of cameras A device for diagnosing a golf swing by measuring the direction of a surface, that is, a lie angle or a loft angle, has been proposed.
[0004]
For example, Patent Literature 1 and Patent Literature 2 propose an apparatus for analyzing or diagnosing a golf swing by attaching an angle sensor or an acceleration sensor to a wrist of a golfer. However, in these devices, the trajectory of the golf club shaft during the golf swing is not displayed on the screen, and the golf swing cannot be visually obtained, so that it is difficult for the golfer to improve the golf swing.
Patent Document 3 below proposes a device that records a golf swing by specifying a still screen at the time of impact from an image captured by a video camera and records and reproduces a swing form.
However, since this device cannot view the golf swing from a desired position or direction, it is difficult to find a habit of the trajectory of the golf swing, and it is difficult for the golfer to improve the golf swing.
On the other hand, Patent Literature 4 below proposes a method of analyzing a golf swing by measuring a three-dimensional position and a direction of a grip portion of a golf club using a magnetic sensor.
[0005]
(Patent Document 1) JP-A-09-154996
[0006]
(Patent Document 2) JP-A-10-43346
[0007]
(Patent Document 3) JP-A-2001-54607
[0008]
(Patent Document 4) JP 2001-112903 A
[0009]
[Problems to be solved by the invention]
However, in the golf swing analysis method in Patent Document 4, the behavior of the grip portion of the golf club is measured, various parameters defining the trajectory of the golf swing are obtained, and the golf swing is typified by these parameters. An image that reproduces the golf swing is not displayed immediately after the golf swing. Further, the golfer cannot visually recognize the golf swing ideal for the golfer among the various golf swings, and cannot create an image of the golf swing while comparing the golf swing with his or her own golf trajectory.
[0010]
Accordingly, the present invention provides a golf swing analysis system that can display a moving image of a golf swing immediately after a golf swing and visually inform a golfer of the golf swing habit to solve the above problem. The purpose is to:
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a golf swing analysis system for analyzing a golf swing performed using a golf club,
A three-dimensional position / direction measuring device that measures time-series data of the orientation of the grip portion with respect to a predetermined reference direction in addition to time-series data of the three-dimensional position of the grip portion of the golf club with respect to a predetermined reference position during a golf swing. When,
A data processing device that creates moving image data that reproduces the movement of the shaft of the golf club based on the time-series data of the three-dimensional position of the grip portion and the time-series data of the orientation of the grip portion;
A golf swing analysis system comprising: an image display device that reproduces a movement of a shaft of a golf club using moving image data output from the data processing device.
[0012]
Here, the three-dimensional position / direction measuring device is fixed to the grip portion, and a magnetic field forming means for forming a magnetic field having a known distribution of strength and direction within a movement range of the grip portion during a golf swing. A magnetic sensor that outputs a signal including information of a three-dimensional position with respect to the reference position and an Euler angle with respect to the reference direction by sensing the magnetic field; It is preferable to have a control unit for generating series data and time series data of the orientation of the grip portion.
Further, the data processing device generates moving image data that reproduces the movement of the golf club shaft viewed from a desired direction by setting a viewpoint position and a viewpoint direction when reproducing the movement of the golf club shaft. Is preferred.
[0013]
Further, the data processing device generates desired time-series data by performing an operation using time-series data of the three-dimensional position of the grip portion and time-series data of the orientation of the grip portion,
It is preferable that, when reproducing the movement of the golf club shaft, the image display device simultaneously displays the generated desired time-series data in a graph. At this time, the time series data generated by the calculation is preferably time series data of physical quantities acting on the golf club shaft.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a golf swing analysis system according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
[0015]
FIG. 1 is a configuration diagram showing a schematic configuration of an example of a golf swing analysis system of the present invention.
An analysis system 10 shown in FIG. 1 includes a three-dimensional position / direction measuring device (hereinafter, simply referred to as a three-dimensional position measuring device) 12, a computer 14 as a data processing device, and an image display monitor 16 as an image display device. This is a system for displaying a moving image that reproduces the golf swing on the image display monitor 16 immediately after the golf swing.
[0016]
The three-dimensional position measurement device 12 includes a transmitter 12a that forms a magnetic field having a distribution with a known intensity and direction within a movement range of the grip portion 20 during a golf swing performed by gripping the grip portion 20 of the golf club 18, A receiver (magnetic sensor) 12b that is fixed to the grip portion 20 and outputs a signal including information on a three-dimensional position and an Euler angle with respect to a reference position by sensing a magnetic field. Dimensional position (x _m , Y _m , Z _m ) And the Euler angle (θ _y , Θ _p , Θ _r And a controller 12c for generating the time series data.
[0017]
That is, as shown in FIG. 1, the three-dimensional position measuring device 12 generates three kinds of predetermined magnetic fields one after another from a transmitter 12a arranged and fixed behind a golf swinger, while moving and rotating a grip portion. The receiver 12b fixed to 20 senses magnetism corresponding to the position and orientation in the three types of magnetic fields generated by the transmitter 12a, and outputs a total of nine output voltages, from which data processing is performed by the controller 12c. Is performed to obtain data of the three-dimensional position and orientation (Euler angle) of the receiver 12b.
[0018]
The three-dimensional position measuring device 12 will be described in detail. As shown in FIG. 2, a transmitter 12a that forms a predetermined magnetic field, and generates an output voltage in three axial directions according to the strength and direction of the magnetic field. It has a receiver 12b and a controller 12c.
The controller 12c generates a drive signal for sequentially generating predetermined three types of magnetic fields in the transmitter 12a, detects a signal output from the receiver 12b, performs data processing based on the detected signal, and performs a predetermined position, For example, the position of the transmitter 12a is set as a reference position, and three-dimensional position coordinates (x _m , Y _m , Z _m ) And a posture angle representing the direction of the receiver 12b with respect to a predetermined reference direction, for example, the X, Y, Z coordinate axis directions, that is, the yaw angle, the pitch angle, and the roll angle (hereinafter, the Euler angle (θ _y , Θ _p , Θ _r ) Is calculated and output.
[0019]
As shown in FIG. 2, the transmitter 12a and the receiver 12b are each formed of three coils wound in a loop in three axial directions orthogonal to each other, and the transmitter 12a is fixedly disposed behind a golf swinger. Then, the receiver 12b is fixed to an end of the grip portion 20 of the golf club 18, for example. The controller 12c controls the drive circuit 12d that generates a drive signal that sequentially generates three types of magnetic fields, the detection circuit 12e that detects a signal output from the receiver 12b, and controls the drive circuit 12d and the detection circuit 12e. The control unit 12f determines the three-dimensional position and the Euler angle of the receiver 12b from the signal sent from the detection circuit 12e. The transmitter 12a is connected to the drive circuit 12d, and the receiver 12b is connected to the detection circuit 12e.
[0020]
The three-dimensional position measuring device 12 is configured as described above. Note that the three-dimensional position coordinates (x _m , Y _m , Z _m ) And the Euler angle (θ _y , Θ _p , Θ _r The time series data of ()) is obtained as follows.
As shown in FIG. 2, the drive circuit 12d outputs the same signal whose frequency and phase are always constant according to a command signal from the control unit 12f, and drives the three loop-shaped coils wound in the three axial directions of the transmitter 12a. Excite sequentially. Each loop-shaped coil generates a different magnetic field each time it is excited, and generates an independent voltage in each of the three loop-shaped coils wound in the three-axis direction of the receiver 12b based on the magnetic field. Since this voltage is three independent voltages generated in three loop coils of the receiver 12b in accordance with three magnetic fields excited by the three loop coils of the transmitter 12a, a total of nine (3 × 3) voltages are generated. 3) voltages are obtained.
[0021]
On the other hand, since the transmitter 12a for forming the magnetic field is fixedly installed at a predetermined position, the distribution of the intensity and direction of the generated magnetic field is known with respect to the reference position where the transmitter 12a is installed and the reference direction. Then, by using the nine voltages generated by the formed magnetic field, the three-dimensional position coordinates (x _m , Y _m , Z _m ) And the Euler angle (θ _y , Θ _p , Θ _r ) Can be obtained.
The control unit 12f of the controller 12c uses the nine voltages sent from the detection circuit 12e to generate three-dimensional position coordinates (x _m , Y _m , Z _m ) And Euler angle (θ _y , Θ _p , Θ _r ) Is calculated.
The three-dimensional position coordinates (x _m , Y _m , Z _m ) And Euler angle (θ _y , Θ _p , Θ _r ) Are supplied to the computer 14 which is a data processing unit.
[0022]
In the present embodiment, as shown in FIG. 2, the receiver 12b has coils wound in a loop in three axial directions orthogonal to each other. The end of the grip portion 20 of the golf club 18 is determined by orienting the receiver 12b so as to be aligned with the axial direction of the shaft of the golf club and one of the remaining two axial directions is aligned with the hitting direction of the golf club. Can be fixed to
As such a three-dimensional position measuring device 12, for example, 3SPACE FASTRAK (manufactured by Polhemus) can be mentioned.
[0023]
Here, three-dimensional position coordinates (x _m , Y _m , Z _m ) Is a distance x from the reference position of the grip unit 20 in the XYZ coordinate system, as shown in FIG. _m , Y _m And z _m It is. On the other hand, the Euler angle (θ _y , Θ _p , Θ _r ) Are rotation angles that define how each coordinate axis of the xyz coordinate system in the receiver 12b is rotated with respect to the XYZ coordinate system, as shown in FIGS. 3B to 3D. That is, the Euler angle (θ _y , Θ _p , Θ _r ) Indicates that the X, Y, and Z axes are first rotated around the Z axis and rotated around the X axis as the X ′ axis, and that the X, Y and Z axes are rotated around the Y ′ axis. And the rotational transformation performed about the X ″ axis generated by this rotation, the rotational transformation defined to match the x-axis, y-axis, and z-axis of the receiver 12 fixed to the grip portion 20 The yaw angle, pitch angle and roll angle, which are rotation angles.
[0024]
The computer 14 receives the supplied three-dimensional position coordinates (x _m , Y _m , Z _m ) And Euler angle (θ _y , Θ _p , Θ _r ), The time-series data on the three-dimensional position of the grip unit 20 and the orientation of the grip unit 20 in the three-dimensional direction in the XYZ coordinate system is calculated and obtained. For example, three-dimensional position coordinates (x _m , Y _m , Z _m ), And time series data of the azimuth angle, the elevation angle, and the rotation of the golf club shaft around the axis in the XYZ coordinate system. The time-series data of the three-dimensional position of the grip unit 20 and the three-dimensional direction of the grip unit 20 in the XYZ coordinate system is stored in the memory of the computer 14 or a recording medium.
In the analysis system 10, a sensor that generates a trigger signal when the golf club head passes is arranged, and based on the trigger signal, the top state during a golf swing or the state from the address state via the top state. , Follow-through, and time series data for the finish.
[0025]
Further, the computer 14 has preset the viewpoint position and the viewpoint direction in advance, and reproduces the movement of the golf club shaft from the three-dimensional position of the grip unit 20 and the time-series data of the orientation of the grip unit 20 in the XYZ coordinate system. To generate moving image data. Of course, the default setting can be changed as described later.
The moving image data is a stick corresponding to the length of the golf club shaft from the grip portion of the golf club to the end on the golf club head side when the golf swing is viewed based on the set viewpoint position and viewpoint direction. This is moving image data representing a trajectory.
[0026]
Further, when reproducing the moving image of the golf swing, the computer 14 may create graph data for simultaneously displaying the generated time-series data in a graph. For example, time series data of a physical quantity acting on a golf club shaft, for example, speed and acceleration at the golf club head position from the shaft length of the golf club shaft, and further, physical quantities such as inertial force applied to the golf club head are calculated. Then, graph data for displaying a graph in synchronization with the golf swing during reproduction of the moving image may be created from the physical quantity. Of course, a desired coordinate value of the time-series data of the three-dimensional coordinate position of the grip unit 20 or the three-dimensional coordinate position, for example, x _m And y _m The graph data of the trajectory of the grip unit and the orientation of the grip unit 20 may be created and used to display the graph in synchronization with the golf swing during the reproduction of the moving image.
The moving image data and the graph data are supplied to the image display monitor 16.
[0027]
The image display monitor 16 displays a moving image of the golf swing, displays an image in which the viewpoint position and direction of the displayed moving image are changed, and displays a time-series change in the physical quantity acting on the golf club shaft in the moving image. This is a display device for displaying together with the information, and a normal CRT or liquid crystal display is used.
[0028]
FIGS. 4A to 4C are examples of graphs conventionally displayed on the screen, and show the movement of the grip portion and the golf club shaft from the top state to the downswing state and the follow-through in the golf swing. FIG. 7 is a diagram (top view, front view, and side view) showing a graph of a still image in which the trajectory is overwritten. Conventionally, a golfer who has performed a golf swing as a subject has only grasped his own swing by examining the graph of the still image.
However, in the present embodiment, a graph of a still image is sequentially displayed as a moving image in chronological order, and it is preferable that the drawing speed is drawn at a speed corresponding to real time, so that a golfer who has performed a golf swing as a subject has a more realistic view. The movement of the golf club shaft is fed back.
[0029]
The movement of the golf club shaft that reproduces the actual golf swing is simplified because it is complicated, and the golfer bends the elbow by 90 degrees to keep the entire golf club shaft horizontal to the ground and place the golf club around the vertical axis of the body. The movement of the golf club shaft when shaken lightly will be described. FIGS. 5A to 5C are graphs of moving images of this movement.
FIG. 5A is a graph showing the start of a moving image in which a golf club shaft is displayed with one stick (line segment). FIG. 5B is a graph showing a state where the time has further advanced from the state of FIG. 5A, and the history before this time is displayed by a plurality of sticks. FIG. 5C is a graph showing a state in which the golf club has been swung, in which the entire history of the golf club shaft is displayed.
In such a history of the golf club shaft, a series of movements from the top state of the golf swing to the downswing state and further to the follow-through are graphically displayed as a moving image using a stick, so that a golfer who has performed a golf swing as a subject can be displayed. Can observe this video in accordance with his / her own experience. In particular, if a moving image is displayed at a drawing speed that matches the real time, it is needless to say that the golfer's bodily sensation becomes more realistic.
[0030]
The moving image data for generating such a moving image depends on the viewpoint position and the viewpoint direction of watching the golf swing, and the viewpoint position and the viewpoint direction are, as shown in FIG. 6A, the focal length (Fl). , X ₁ Camera, Y ₁ Camera, Z ₁ Camera, X ₁ Look, Y ₁ Look, Z ₁ Seven parameters of Look are set in advance by default. When the setting is changed, an input screen as shown in FIG. 6A is displayed on the monitor 16, and the setting is changed by inputting from a mouse or a keyboard (not shown).
[0031]
As shown in FIG. 6 (b), the moving image of the golf swing projects the trajectory of the golf club shaft on the screen S and sets the image I of the golf swing (camera point C). _P ) Is a moving image of the image viewed from. That is, the focal length (Fl) is the screen S and the camera point C. _p Is the distance. X ₁ Camera, Y ₁ Camera and Z ₁ Camera is a preset X ₁ Y ₁ Z ₁ Camera point C in coordinate system _p Is the position coordinate of X ₁ Look, Y ₁ Look, Z ₁ Look determines which position on the golf swing to look at, X ₁ Y ₁ Z ₁ Viewpoint position L in coordinate system _p Are the position coordinates.
[0032]
Thus camera point C _p And the position L of the viewpoint _p Is input, the viewpoint position and viewpoint direction for viewing the golf swing are set, and the moving image data is created from the time-series data representing the three-dimensional position coordinates and the direction of the three-dimensional grip unit 20.
[0033]
Note that Focal length (Fl), X ₁ Camera, Y ₁ Camera, Z ₁ Camera, X ₁ Look, Y ₁ Look, Z ₁ As shown in FIG. 6A, specific values of seven parameters of Look are preset in advance as shown in FIG. This default setting can be changed, and the seven parameters are re-input so that a golf swing in which the desired viewpoint position input and set by the golfer as viewed from the desired viewpoint direction is displayed as a moving image, The moving image data is calculated again so that the moving image is displayed again. The changed parameters are stored in the computer 14.
[0034]
FIGS. 7A to 7D show examples of one screen during displaying a moving image of a golf swing. FIG. 7A shows an example in which the Focal length (Fl) is reduced from 0.05 m to 0.25 m. By changing the focal length (Fl), the width of the visual field of the moving image is changed, and the trajectory around the grip unit 20 can be displayed in an enlarged manner.
FIG. 7B shows the camera point C. _p X of ₁ FIG. 7C shows a case where the coordinate value is changed. _p Of Y ₁ FIG. 7D shows a case where the coordinate value is changed. _p Z ₁ This shows a case where the coordinate values have been changed. Camera point C _p The behavior of the golf swing can be viewed from different directions by changing the viewpoint direction. In each of the above examples, one coordinate value is changed, but a plurality of coordinate values may be changed simultaneously.
[0035]
Similarly, FIG. 8A shows the position L of the viewpoint shown in FIG. _p X of ₁ FIG. 8B shows a case where the coordinate values are changed. _p Of Y ₁ FIG. 8C shows a case where the coordinate values are changed. _p Z ₁ This shows a case where the coordinate values have been changed. Position L _p By changing the viewpoint, the position of the golf swing on the moving image and the size of the field of view can be changed. In each of the above examples, one coordinate value is changed, but a plurality of coordinate values may be changed simultaneously.
[0036]
The computer 14 measures a typical golf swing directed by the golfer with the three-dimensional position measuring device 12 and pre-records and saves three-dimensional position coordinates and orientation time-series data of the grip portion 20 to be used as a subject. In response to the request of the golfer who has performed the golf swing, the moving image of the golf swing having the ideal pattern for the golfer may be displayed side by side or overwritten on the moving image of the golfer's own golf swing.
At the same time as the golfer's golf swing, a golfer's ideal golf swing display is displayed, and by viewing the golfer's view from a desired viewpoint, the drawbacks of the golfer's swing can be easily known. It can be close to a golf swing.
The analysis system 10 is configured as described above.
The analysis system 10 uses magnetism to acquire time-series data of the three-dimensional position of the grip unit 20 and time-series data of the orientation of the grip unit 20. In the present invention, a plurality of cameras are used. Thus, time-series data of the three-dimensional position and orientation of the grip unit 20 may be obtained.
However, in many cases, a shielded portion where a golf club cannot be photographed even when a plurality of cameras are used occurs. Therefore, in order to accurately obtain the rotation around the golf club shaft, it is necessary to use the above-described three-dimensional position measuring device using magnetism. preferable.
[0037]
In such an analysis system 10, three-dimensional position coordinates and an Euler angle in the grip portion 20 are generated using the three-dimensional position measurement device 12 during a golf swing, and are supplied to the computer 14.
[0038]
The computer 14 determines the two-dimensional position coordinates on the screen S and the orientation of the grip unit 20 based on the default set viewpoint position and viewpoint direction from the three-dimensional position coordinates and the Euler angles, and FIG. As shown, moving image data in which a stick corresponding to a golf club shaft moves with time is created. The moving image data is immediately supplied to the image display monitor 16 every time the golf swing ends, and a moving image of the golf swing is displayed as shown in FIGS.
[0039]
The golfer can visually recognize the behavior of his golf swing by looking at the image display monitor 16.
When the golfer wants to view his or her golf swing from a desired direction, an input screen as shown in FIG. 6A is displayed on the image display monitor 16 in order to change the viewpoint position and the viewpoint direction, and the focal length (Fl) is displayed. ), X ₁ Camera, Y ₁ Camera, Z ₁ Camera, X ₁ Look, Y ₁ Look, Z ₁ Change 7 parameters of Look. The computer 14 immediately obtains the changed two-dimensional position coordinates on the screen S and the orientation of the grip unit 20 after changing the parameters, and creates moving image data. The created moving image data is immediately supplied to the image display monitor 16, and the moving image is displayed again.
The re-display of the moving image is performed in synchronization with the internal clock of the computer 14 so that the drawing speed matches the real-time speed. I can figure it out.
Thus, the golfer's own golf swing viewed from the desired direction can be reproduced many times.
[0040]
At that time, the golfer simultaneously reproduces the golf swing video of the ideal pattern of the golfer, together with the video of his own golf swing, by changing the display color and overwriting, and there is a difference in any part of the swing. It is easy to visually find the difference, and for example, it is possible to easily find a habit or a defect of the golf swing, such as quick release of the cock immediately before impact or too strong cock.
[0041]
The computer 14 generates data of desired physical quantities, for example, velocity, acceleration, and inertial force applied to the golf club head, which are calculated from the three-dimensional position coordinates and Euler angles, in accordance with the instruction, creates graph data, and monitors the graph. 16 may be displayed. Of course, as shown in FIGS. 9A and 9B, graph data may be created using three-dimensional position coordinates or Euler angles and displayed on the image display monitor 16. FIG. 9A shows a coordinate value y among three-dimensional coordinate positions. _m 9B shows a time-series graph. FIG. 9B shows a coordinate value x of the three-dimensional coordinate positions of the grip unit 20. _m And y _m 3 shows a graph of a spatial trajectory of the grip unit 20 according to the first embodiment.
The golfer can know his golf swing more objectively while looking at the visually viewable moving image and the graphs shown in FIGS. 9 (a) and 9 (b). In particular, by displaying the time series data of the rotation around the golf club shaft as a graph, which is difficult to display only with a moving image representing the golf club shaft displayed as a stick (line segment), information on opening and closing of the face of the golf club can be obtained. You can know at the same time that the video of the golf swing is reproduced.
Such moving image data may display the numerical value of the head speed on the monitor 16 by combining a known measuring device or the like for measuring the head speed during the golf swing.
[0042]
As described above, the golf swing analysis system of the present invention has been described in detail. However, the present invention is not limited to the above embodiments, and various improvements and changes may be made without departing from the spirit of the present invention. Of course.
[0043]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to measure the three-dimensional position coordinates of the grip portion and the Euler angle representing the orientation of the grip portion during the golf swing, and use this measurement result to measure the golf swing. Immediately after the video is reproduced, the golfer can see the trajectory of the golf club shaft from the downswing to the impact and follow-through in a real-time flow, making it easy to visually understand the habit of his golf swing. You can know.
In addition, since the moving image of the golf swing can be reproduced many times from a desired direction, it is possible to know the golf swing habit more effectively.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an example of a golf swing analysis system of the present invention.
FIG. 2 is a diagram showing a configuration of an example of a three-dimensional position / orientation measuring device used in the golf swing analysis system of the present invention.
FIGS. 3A to 3D are explanatory diagrams illustrating data obtained by the three-dimensional position / direction measuring device illustrated in FIG. 2;
FIGS. 4A to 4C are diagrams illustrating examples of a graph of a still image conventionally displayed on a screen.
FIGS. 5A to 5C are diagrams illustrating an example of a moving image graph in which the movement of a golf club shaft in a simplified golf swing is displayed in the golf swing analysis system of the present invention.
6A is a diagram illustrating an example of an input screen displayed on the image display device of the golf swing analysis system according to the present invention, and FIG. 6B is an explanatory diagram illustrating parameters input to the input screen. It is.
FIGS. 7A to 7D are diagrams showing another example of a display screen on which a moving image is displayed in the golf swing analysis system of the present invention.
FIGS. 8A to 8C are diagrams showing another example of a display screen displayed as a moving image in the golf swing analysis system of the present invention.
FIGS. 9A and 9B are diagrams showing an example of a graph displayed on the screen in the golf swing analysis system of the present invention.
[Explanation of symbols]
10 Analysis system
12 3D position / direction measuring device
12a transmitter
12b receiver
12c controller
12d drive circuit
12e detection circuit
12f control unit
14 Computer
16 Image display monitor
18 Golf Club
20 Grip part

Claims (5)

A golf swing analysis system for analyzing a golf swing performed using a golf club,
A three-dimensional position / direction measuring device that measures time-series data of the orientation of the grip portion with respect to a predetermined reference direction in addition to time-series data of the three-dimensional position of the grip portion of the golf club with respect to a predetermined reference position during a golf swing. When,
A data processing device that creates moving image data that reproduces the movement of the shaft of the golf club based on the time-series data of the three-dimensional position of the grip portion and the time-series data of the orientation of the grip portion;
A golf swing analysis system comprising: an image display device that reproduces the movement of the shaft of the golf club using the moving image data output from the data processing device. The three-dimensional position / orientation measuring device includes: a magnetic field forming unit that forms a magnetic field having a distribution having a known strength and direction within a movement range of the grip unit during a golf swing; And a magnetic sensor that outputs a signal including information on the three-dimensional position with respect to the reference position and the Euler angle with respect to the reference direction. The golf swing analysis system according to claim 1, further comprising a control unit configured to generate time-series data of the orientation of the grip portion. The data processing device generates moving image data that reproduces the movement of the golf club shaft viewed from a desired direction by setting a viewpoint position and a viewpoint direction when reproducing the movement of the shaft of the golf club. The golf swing analysis system according to claim 1 or 2, wherein: The data processing device generates desired time-series data by performing an operation using time-series data of the three-dimensional position of the grip unit and time-series data of the orientation of the grip unit,
The golf swing analysis according to any one of claims 1 to 4, wherein the image display device displays the generated desired time-series data simultaneously as a graph when reproducing the movement of the golf club shaft. system. The golf swing analysis system according to claim 4, wherein the time series data generated by the calculation is time series data of physical quantities acting on the golf club shaft.

Images