KR20180028449A - Indication and display of the golf club swing - Google Patents

Abstract

It accurately characterizes the swing that affects the position of the point of impact of the golf ball. A two-dimensional coordinate axis indicating a right and left entry angle? And a face angle? On impact and a shift amount (?) Estimated from a left and right entry angle? And a batting face angle? A plurality of areas divided in accordance with the tendency of the ball of the golf ball 2 in the flying direction and a measuring point for measuring the behavior of the golf club head 16 when the golfer actually swings are displayed . Since the slice area A1, the fade area A2, the straight area A3, the draw area A4 and the hook area A5 are displayed as a plurality of areas, It is more advantageous to provide a simple and easy-to-understand characteristic of the swing which influences the direction in which the ball, such as a hook or the like, is blown.

Description

Indication and display of the golf club swing

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a display method and a display chart of a swing of a golf club.

Conventionally, as a method of measuring and analyzing a golf swing, there is a method of photographing a golf swing with a camera, analyzing the behavior of the golf club head from the shot image, extracting features of the golf swing, A method of directly measuring the behavior of a golf club head using a sensor or an interrupter type optical sensor detecting the passage of a plurality of optical beams arranged at a predetermined position across a golf club head And measuring the behavior of the golf club head.

All of these can measure roughly the trajectory of the golf club head, but the behavior of the golf club head immediately prior to the hit of the golf ball determining the direction in which the ball of the golf ball is blown can not be accurately grasped.

On the other hand, Patent Documents 1 and 2 below disclose a device capable of measuring the behavior of a golf club when a golf ball is hit.

As described in [0023] of Patent Document 1, by arranging four sensors, the incidence angle of the golf club head relative to the golf ball can be roughly known. Similarly to Patent Document 2, by arranging four sensors, the angle of incidence of the golf club head with respect to the golf ball can be roughly known.

However, in the measurement of the behavior of the golf club according to Patent Documents 1 and 2, although the angle of incidence of the golf club head with respect to the golf ball can be roughly known, the angle of incidence of the ball, such as a hook, slice, It was difficult to briefly understand the characteristics of the swing of a golf club that influenced the direction of this flight.

Therefore, the applicant of the present invention has proposed a display method of a swing of a golf club, which can easily and easily understand the characteristics of the swing affecting the direction in which the ball is blown (see Patent Document 3).

In this display method, a reference line for projecting a target line connecting the center of the golf ball and a target on a plane parallel to the horizontal plane, and a reference line for projecting a tangent line to a movement locus of the golf club head immediately before striking the golf ball, The angle formed by one straight line is defined as the left and right entering angles.

The angle formed by the reference line and the second straight line projecting on the plane perpendicular to the center point of the face surface of the golf club head immediately before hitting the golf ball is defined as the face angle at impact.

The X-axis representing the left-right approach angle and the Y-axis orthogonal to the X-axis and representing the face angle at impact are defined as the two-dimensional On the coordinates and the two-dimensional coordinates, a plurality of areas whose boundaries are divided according to the tendency of the ball to fly are displayed on the display screen.

The plurality of areas are, for example, a slice area, a fade area, a hook area, a draw area, and a straight area.

On the display screen, a coordinate point indicating the value of the left and right approach angles measured when the golfer hit the golf ball using the golf club and the value of the face angle at the time of hit is displayed as the measurement point.

Japanese Patent Application Laid-Open No. 2001-314540 Japanese Patent Publication No. 3073828 Japanese Unexamined Patent Application Publication No. 2011-110164

According to the related art, it is advantageous to easily and clearly display the characteristic of the swing which affects the direction in which the ball, such as a hook or a slice, of the golf ball is blown.

However, the closer the distance from the baseline to the landing point (shift amount) is, the better the evaluation of the golf ball's flying direction.

In the above-described prior art, although the direction in which the ball is blown is evaluated in consideration of the right and left approach angles when the golf ball is hit and the face angle at the time of impact, the direction of the ball, There is not sufficiently considered about the left and right throw angle of the golf ball and the side spin amount of the hit golf ball.

Therefore, in the above-described conventional technique, there is room for improvement in more accurately evaluating the distance (shift amount) from the reference line to the landing point.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide a display method and a display device for swing of a golf club which is advantageous in accurately providing characteristics of a swing affecting a position of a landing point of a golf ball It is intended to provide a chart.

In order to accomplish the above object, the present invention provides a golf club head swinging by a golfer, wherein the golf club head of the golf club swings a characteristic of the swing measured on the basis of the behavior of the golf club head immediately before striking the golf ball, Wherein a reference line projecting a target line connecting the center of the golf ball and a target on a plane parallel to the horizontal plane and a movement line of the golf club head immediately before hitting the golf ball Is a left-right entering angle, and a positive tone of the right-left entering angle is a positive angle on the opposite side of the golfer with respect to the baseline as an angle formed by the first straight line projected on the plane , And a normal line passing through the center line of the face surface of the golf club head immediately before hitting the golf ball with the reference line is set as a negative angle And the angle formed by the second straight line projected on the plane is defined as a face angle at the time of striking, the positive tone of the face angle at the time of striking is defined as a positive angle on the opposite side of the golfer with respect to the reference line, And an angle formed by a line projected from the golf ball immediately after being hit by the golf club head of the golf club swung by the golfer and projected on the plane and the reference line is referred to as a left and right launch angle, The positive tone is a golf ball immediately after being hit by the golf club head of the golf club swung by the golfer, with the opposite side of the golfer being a positive angle around the baseline, The amount of spin around the vertical line passing through the center of the ball is referred to as a side spin amount, An anticipatory step of estimating the left and right launching angles and the side spin amounts from measured values of the left and right approach angles and the batting time face angle, A simulation step of simulating a movement locus of the golf ball on the basis of a ball speed of the golf ball and an up and down angle of the golf ball to calculate a shift amount that is a distance from the reference line to the landing point; Wherein the simulation step is repeated to accumulate data consisting of the left and right entry angles, the batting phase angle and the shift amount, and based on the accumulated data, an X-axis indicating the left and right entry angles, A Y axis representing a face angle at the time of impact, and an intersection point of the X axis and the Y axis, A plurality of areas divided in accordance with a tendency of a ball to fly specified on the basis of the left and right entering angles, the batting time face angle and the shift amount on two-dimensional coordinates of an entry angle and a zero- A coordinate map display step of displaying the two-dimensional coordinate axes on a display screen of the display device; and a display step of displaying a plurality of areas on the display screen based on the classification map And a coordinate point indicating a value of the right and left entry angles measured when the golfer hit the golf ball using the golf club and a value of the angle of the hit face are displayed on the display screen as measurement points And a measurement point display step.

The present invention is also a representation of a swing of a golf club indicating the characteristics of the swing measured based on the behavior of the golf club head immediately before the golf club head of the golf club swung by the golfer strikes the golf ball A reference line for projecting a target line connecting the center of the golf ball and a target on a plane parallel to the horizontal plane and a tangent line for a movement locus of the golf club head immediately before striking the golf ball, Wherein the angle formed by the first straight line is referred to as a right and left approach angle and the positive and negative angles of the right and left approach angles are defined as positive angles on the opposite side of the golfer with respect to the baseline as a positive angle, And an angle formed by a second straight line projecting a normal line passing through a center point of the face surface of the golf club head immediately before hitting the golf ball, And the positive angle of the face angle at the time of striking is defined as a positive angle at the time of hitting and a positive angle at the opposite side of the golfer with respect to the reference line as a positive angle, Axis, and a Y-axis orthogonal to the X-axis and indicating the angle of the face at the time of striking, wherein an intersection of the X-axis and the Y-axis is a two-dimensional coordinate formed by zero degrees of the left and right entering angles and the striking face angle, Dimensional coordinate system having a plurality of areas divided in accordance with a tendency of a ball to fly in a two-dimensional coordinate system, wherein the two-dimensional coordinate axes intersect the X and Y axes and extend at a positive slope Dimensional coordinate axes and a second boundary line intersecting the first boundary line and having a slope larger than that of the first boundary line, Wherein a plurality of areas divided in accordance with a tendency in a direction in which the balls are blown out are provided in a region surrounded by the first boundary line and the second boundary line, A draw area displayed in a region located on the positive direction side of the X axis and the Y axis and a region displayed on the negative direction side of the X axis and the Y axis among the two regions sandwiched by the first boundary line and the second boundary line A slice area displayed in an area located on the side of the draw area and the positive direction of the Y axis with respect to the draw area and the fade area and a slice area displayed in a region located on the negative direction side of the draw area and the Y axis more than the fade area A hook area, and a straight area displayed on the second boundary line.

According to the display method and display chart of the swing of the golf club of the present invention, based on the right and left approach angles and the face angle at the time of hitting the golf ball immediately before hitting the golf ball, It is advantageous to classify more precisely the type of golf swing which influences the position of the landing point of the golf ball since the type of golf swing is classified in consideration of the amount of shift estimated from each angle.

FIG. 1 is an explanatory view of an element that influences a direction in which a ball of a hit golf ball is blown by a golf club swung by a golfer.
2 is a block diagram showing the configuration of the setting apparatus 10 of the golf club of this embodiment.
FIG. 3 (a) is a perspective view of an iron-based golf club head 16A to be measured by the golf club selecting apparatus 10. FIG. 3 (b) is a perspective view of a wood- (C) is an explanatory view showing the markers 20a, 20b, 20c and the marker feature points 21a, 21b, 21c.
4 is a perspective view of the radiation photographing section 11. Fig.
5 is a plan view of the irradiation photographing section 11. Fig.
6 is a plan view showing a modified example of the irradiation photographing section 11. Fig.
Fig. 7 is a block diagram showing the configuration of the computer 14. Fig.
Fig. 8 is a functional block diagram of the computer 14. Fig.
FIG. 9A is a schematic diagram showing a time history of movement of a marker determined from three-dimensional position coordinates of marker feature points; FIG. 9B is a schematic view showing a time history of movement of a marker, Fig. 7 is a schematic view showing the behavior of the head.
10 is a plan view showing a state in which the golf club head 16 immediately before hitting the golf ball 2 is seen from a plane.
11 is a plan schematic diagram for explaining the right-left entry angle [theta].
Fig. 12 is a schematic diagram for explaining the face angle [phi] at impact.
Fig. 13 is a schematic diagram showing a case in which the left and right entry angles? On the horizontal axis (X axis) and the face angle? On the vertical axis (Y axis) are determined and data of the left and right turn angles are arranged at the respective coordinate points.
Fig. 14 is a schematic diagram showing a case in which the right and left entry angles? On the horizontal axis (X axis) and the face angle? On the vertical axis (Y axis) are determined and the data of the side spin amount is arranged at each coordinate point.
15 is a schematic diagram for explaining the configuration of a classification map.
16 is a schematic diagram for explaining each area and a boundary line.
17 is a first explanatory diagram of a classification map when the golf club is a driver.
18 is a second explanatory diagram of a classification map when the golf club is a driver.
19 is a third explanatory diagram of a classification map when the golf club is a driver.
20 is a first explanatory diagram of a classification map in the case where a golf club is an iron.
21 is a second explanatory diagram of a classification map when the golf club is an iron.
22 is a third explanatory diagram of a classification map in the case where the golf club is an iron.
23 is a diagram showing a display example of a simplified classification map.
24 is a schematic diagram for explaining the center distance L and the central angle alpha of the golf club head 16. As shown in Fig.
25 (a) and 25 (b) are schematic diagrams for explaining a method for obtaining the center distance L defined by the golf club of the present invention.
26 (a) and 26 (b) are explanatory views for explaining the center distance (FGL) and the face progression (FP) on the face surface.
FIG. 27A is a perspective view of the iron-based golf club 4, FIG. 27B is a cross-sectional view of the golf club 4 when cut along the line X-X ' Is a sectional view of the grip 7 before mounting.
28 (a) is a front view for explaining a state in which the golf club 4 is installed at a normal (normal) address position, and Fig. 28 (b) is a plan view.
Figs. 29A, 29B and 29C are diagrams for explaining the relationship between the grip angle? And the direction of the face surface 1602 of the golf club 4.
Figs. 30 (a) and 30 (b) are explanatory diagrams showing the grip position mark 7C formed on the grip 7. Fig.
FIG. 31 is a line chart showing a change in the face angle phi when the lie angle of the golf club is changed.
Fig. 32 is a flow chart for explaining the operation of creating a classification map of the golf club selection device 10. Fig.
33 is a flow chart for explaining the display operation of the feature of the swing by the golf club selection device 10 and the operation of creating the display chart.
Fig. 34 is a flowchart for explaining the selection operation of the golf club selection device 10. Fig.

Hereinafter, a golf club selection device to which the swing display method of the golf club of the present invention is applied and a display diagram of the swing of the golf club of the present invention will be described.

First, with reference to FIG. 1, a description will be given of an element that affects the direction in which the ball of the hit golf ball is blown by the golf club swung by the golfer.

If the shortest distance between the reference line projecting the target line connecting the center of the golf ball and the target to a plane parallel to the horizontal plane and the landing point of the golf ball is the shift amount, then the lower the shift amount, the better the direction .

Factors affecting the shift amount include left and right launch angles, side spin amounts, ball speeds, up and down launch angles, and back spin amounts, which will be described later.

It is also conceivable that the left and right launch angles and side spin amounts are determined by the right and left entry angles? Of the golf club head to be described later and the face angle? In addition, strictly speaking, the left-right launching angle and the side spin amount are also influenced by the positions of the RBs on the face surface, but in the present embodiment, the RBs are regarded as being in the center of the face.

The present invention is concerned with the fact that the left and right launch angles are correlated with the left and right entry angles and the face angle upon impact, and the side spin amount correlates with the left and right entry angles and the face angle upon impact.

That is, the present invention simulates the movement trajectory of the golf ball using the left and right throw angle and side spin amount estimated from the correlation based on actual measured values of the left and right approach angles and the hit face angle, , And considering the amount of shift, both sides (good and bad) in the direction in which the ball is blown are classified and evaluated.

The outline configuration of the golf club selecting apparatus 10 of this embodiment will be described.

As shown in Fig. 2, the golf club selecting apparatus 10 includes an irradiating radiographing section 11, a control section 12, and a computer 14. As shown in Fig.

The irradiation photographing section 11 photographs a golf club head by stereo photographing from two different directions. In this embodiment, the radiographing section 11 constitutes a radiographing section.

The control unit 12 controls the irradiation photographing unit 11 and supplies the image data generated by the irradiation photographing unit 11 to the computer 14. [

) 신호 처리, 화상 처리 및 동작 해석을 행하는 것과 함께, 골프 스윙을 타입으로 분류하고, 최적의 골프 클럽을 선정하는 것이다. The computer 14 receives the data of the image photographed by the radiographing section 11 (

) Signal processing, image processing, and motion analysis are performed, and the golf swing is classified into types and an optimum golf club is selected.

Incidentally, in Fig. 2, reference symbol P denotes a golfer, and reference numeral 4 denotes a golf club.

Next, the golf club head to be measured in the golf club selecting apparatus 10 will be described.

3 (a) shows the iron-based golf club head 16A to be measured in the golf club selecting device 10 and FIG. 3 (b) shows the wood-based golf club head 16B .

Incidentally, in the following description, when the iron-based and wood-based golf club heads are shown without distinction, they are denoted as golf clubs 16.

As shown in Fig. 3 (a), in the iron-based golf club head 16A, the top surface of the golf club head 16 contacting the face surface (striking surface) 1602 and the hosel portion Markers 20a, 20b and 20c are provided. Hereinafter, when the markers 20a, 20b, 20c are not distinguished, markers 20 are used.

As shown in Fig. 3 (b), markers 20a, 20b, and 20c are provided at three positions on the upper surface (top surface) forming a crown portion contacting with the face surface 1602 of the wood golf club head 16B Is installed.

For example, the markers 20a, 20b, and 20c may be configured to detect the positions of the markers 20a, 20b, and 20c when the image is captured by the camera 26 And a retroreflective function for reflecting the irradiated light of the light source (light source) 22. The markers 20a, 20b, and 20c are, for example, a known retroreflective sheet cut into a predetermined shape.

The markers 20 are provided at three or more positions on the golf club head, and the positions of the markers 20 are set such that the markers 20 form the apex of a triangle and are not located on one straight line.

In the example of Fig. 3 (a), one marker 20 is provided in the hosel part so that the three retroreflective markers do not lie on one straight line.

In the present embodiment, three or more marker feature points obtained from a marker are used, for example, to obtain the position of the marker as described later. Marker feature points are points that characterize the markers.

In other words, the marker is installed on the surface of the golf club head 16 and has three or more marker feature points.

For example, when the markers 20a, 20b and 20c have a circular shape as shown in Fig. 3 (c), the central point of the circular shape is referred to as marker feature points 21a to 21c, And the position is extracted in the step (32).

In addition to the shapes of the circular markers 20a, 20b, and 20c of the present embodiment shown in Fig. 3 (c), the present invention can be, for example, a regular triangle such as a regular triangle or a square. In this case, the position of the marker feature point to be extracted may be the center point (center of gravity point) of the marker in the case of each regular polygon.

The shapes of the respective markers do not have to be the same, and the shapes described above can be freely combined. In this case, each marker characteristic point of each marker is, for example, the center point (center point) of the marker.

Further, when the marker has an equilateral triangle shape, for example, each of the three vertices of the marker (the intersection of the three sides mutually) may be a marker feature point.

The shape of the marker is not particularly limited, and it may be a shape that characterizes the marker and has one or a plurality of marker feature points from which the position can be uniquely extracted.

Next, the golf club selection device 10 will be described in detail.

Fig. 4 is a perspective view of the radiation photographing section 11, and Fig. 5 is a plan view of the radiation photographing section 11. Fig.

4 and 5, the irradiation photographing section 11 includes an irradiation light source 22, a half mirror 24, a camera 26, a reflecting mirror 28, The half mirror 24, the camera 26, and the reflection mirror 28 are provided on the base 30. The light source 22, the half mirror 24, the camera 26, and the reflection mirror 28 are provided on the base 30.

The irradiation light source 22 irradiates the golf club head 16 as a measurement target.

In this embodiment, the irradiation light source 22 is constituted by a halogen light source or an LED light source, and irradiates continuous light which is temporally continuous.

The irradiation light source 22 is arranged to irradiate the marker 20 of the golf club head 16 through the half mirror 24 with light.

The half mirror 24 is a mirror having almost the same light transmittance and reflectance and transmits half the light incident on the reflection surface (boundary surface) of the half mirror 24 and reflects the remaining half of the light.

The half mirror 24 is provided so as to form an optical path of the light irradiated from the irradiation light source 22 to the reflecting surface of the half mirror 24 when viewed from the plane, at an incident angle of approximately 45 degrees.

The camera 26 includes a photographing lens, an image pickup element for picking up an image of a subject that is led to the photographing lens, and a signal processing unit for generating an image signal based on the image pickup signal generated by the image pickup element.

The camera 26 is arranged so that the optical axis of the photographing lens passes through a portion where the optical path of the irradiation light source 22 and the reflecting surface of the half mirror 24 intersect, And forms an angle of approximately 90 degrees with the optical path of the light of the irradiation light source 22.

The reflecting mirror 28 has a total reflection surface that totally reflects light, and has a function of adjusting the reflection direction (angle) and position of the total reflection surface.

The reflecting mirror 28 reflects the light emitted from the irradiation light source 22 and reflected by the half mirror 24 on the total reflection surface to irradiate the markers 20a, 20b and 20c of the golf club head 16, , The reflecting direction and position of the total reflection surface are adjusted so that the reflected light from the markers 20a, 20b, 20c is reflected again on the total reflection surface and led to the camera 26 through the half mirror 24.

Here, as shown in Fig. 5, the irradiation photographing section 11 irradiates the continuous light toward the reflecting surface of the half mirror 24 by the irradiation light source 22.

Half of the light radiated on the reflecting surface of the half mirror 24 is irradiated to the markers 20a, 20b, and 20c provided on the golf club head to be measured as transmitted light transmitted through the position Shm on the reflecting surface.

The reflected light (hereinafter referred to as marker reflected light 1a) from these markers 20a, 20b and 20c is directed to the reflecting surface of the half mirror 24. [

The marker reflected light 1a propagates in a direction opposite to the irradiation light from the irradiation light source 22 and the marker reflected light 1a is reflected light in which the irradiation light from the irradiation light source 22 coincides with the optical path. The angle of incidence of the light reflected by the markers 20a, 20b and 20c with the reflecting surface of the half mirror 24 and the angle of the marker reflected light 1a with respect to the half mirror 24, The incidence angles incident on the reflecting surfaces of the mirror 24 are approximately the same.

In this way, the marker reflected light 1a is reflected by the reflecting surface of the half mirror 24 and is directed to the photographing lens of the camera 26. [

5, the remaining half of the light irradiated on the reflecting surface of the half mirror 24 is reflected by the reflecting surface of the half mirror 24 and is incident on the total reflecting surface of the reflecting mirror 28. As shown in Fig.

Here, the totally-reflected light is irradiated as irradiation light to the markers 20a, 20b and 20c provided on the golf club head 16 to be measured.

The reflected light (hereinafter referred to as marker reflected light 1b) from the markers 20a, 20b and 20c of this irradiated light is reflected and reflected by the optical path of the irradiated light which is totally reflected from the reflecting mirror 28 and irradiates the markers 20a, 20b and 20c And is directed to the total reflection surface of the reflection mirror 28.

Then, on the total reflection surface of the reflection mirror 28, the marker reflection light 1b is reflected toward the half mirror 24.

Here, the reflection angle (irradiation angle) formed by the reflection surface of the half mirror 24 and the light reflected by the reflection surface of the half mirror 24 and directed toward the reflection mirror 28 and the reflection angle of the half mirror 24 24 are substantially equal to each other.

The marker reflected light 1b transmitted through the half mirror 24 is incident on the photographing lens of the camera 26 together with the marker reflected light 1a reflected by the half mirror 24.

Thus, images of the markers 20a, 20b, and 20c by the two reflected lights from the markers 20a, 20b, and 20c that are substantially coincident with the light path of the irradiated light irradiated from the other two directions are photographed by the camera 26. [

Incidentally, in this embodiment, light is irradiated from the other two directions toward the golf club head 16, and an image of the golf club head 16 is taken from the other two directions.

In the present invention, the golf club head 16 may be photographed from two or more directions. For example, by using a well-known motion capture system, three or more cameras may be used to capture an image of the golf club head 16 Images) from different directions, respectively.

In this case, the position and direction of the reflection mirror 28 are set in advance so that the image formed by the marker reflected light 1b captured by the camera 26 and the image reflected by the marker reflected light 1a do not overlap with each other. (Fine adjustment).

Specifically, one image taken by the camera 26 is divided into two in the vertical direction, and is set as two areas, an upper area and a lower area.

The image of the marker reflected light 1a is photographed in the image area of the image and the image of the marker reflected light 1b is photographed in the lower area of the image. ) Are preliminarily fine-tuned.

In this way, the image of the markers 20a, 20b, 20c by the marker reflected light 1a and the image of the markers 20a, 20b, 20c by the marker reflected light 1b The image of the markers 20a, 20b, and 20c of the golf club head 16 is photographed as a stereo image.

Then, in a state where the golf club head 16 is being moved by the swing, the camera 26 moves the image of the markers 20a, 20b, and 20c at intervals of, for example, 1/2000 seconds by multiple exposures I shoot.

Thereby, a stereo image of the plurality of markers 20a, 20b, 20c is generated by the camera 26 as one image.

Incidentally, for example, a half prism, various beam splitters, or the like can be used as long as it is an optical member that reflects and transmits light incident in both directions on the reflecting surface instead of the half mirror 24. Here, the ratio of the reflectance on the reflecting surface is not particularly limited, but is preferably approximately 1: 1.

The reflection mirror may be constructed as follows.

6 is a diagram showing an example in which reflection mirrors 28a and 28b are arranged in addition to the reflection mirror 28 in the optical path constituted by the irradiating section 11 to equalize the optical path lengths of the marker reflected light 1a and 1b to be.

The reflection mirrors 28a and 28b are provided in the optical path of the marker reflected light 1a so that the marker reflected light 1a extends the optical path from the markers 20a, 20b, and 20c to the half mirror 24, 1b. ≪ / RTI >

6, the optical path length of the marker reflected light 1a becomes longer than that shown in Fig. 5, and the optical path length of the marker reflected light 1a and 1b to the camera 26 is approximately It can be arranged.

By thus setting the optical path length close to each other, the camera 26 can shoot an image of each marker by the marker reflected light 1a, 1b while focusing on it.

In this case as well, the outgoing angles when the light irradiated from two different directions are emitted from the reflecting surface of the half mirror 24 are the two reflected lights (the marker reflected light < RTI ID = 0.0 > (1a, 1b) are incident on the reflecting surface of the half mirror 24 substantially coincide with the incidence angle of the corresponding reflected light. Thus, the images of the two reflected lights of the markers 20a, 20b, and 20c provided on the golf club head 16 can be respectively photographed with high contrast.

The control unit 12 includes a detector 1202 and a buffer memory 1204 as shown in Fig.

5, the detector 1202 detects whether or not the golf club 16 has passed through the position of the movement of the golf club 16 at the position immediately before the shooting range of the camera 26 .

The detector 1202 can use various detectors conventionally known such as a light reflection detector that detects the presence or absence of an object by detecting the reflected light whose detection light is reflected by the object, for example.

The buffer memory 1204 is a storage device for temporarily storing the image data supplied from the camera 26. [

When the control unit 12 detects the passage of the golf club 16 by the detector 1202, a control command for starting the shooting operation is given to the camera 26, A control command to end the photographing operation is given to the camera 26 at a time when the photographing range is out of the photographing range.

The control unit 12 temporarily stores the image data supplied from the camera 26 in the buffer memory 1204 and then supplies the image data to the computer 14. [

The computer 14 has a function of classifying the swing of a golf club by measuring the behavior of the golf club head 16 based on the image data supplied from the control unit 12 and selecting a golf club.

In addition, the computer 14 displays the characteristics of the swing of the golf club and also creates a display chart showing the characteristics.

Fig. 7 is a block diagram showing the configuration of the computer 14. Fig.

The computer 14 includes a CPU 34, a RAM 36, a hard disk device 38, a disk device 40, a keyboard 42 (not shown) connected to the CPU 32 via an interface circuit and a bus line A mouse 44, a display 46, a printer 48, an input / output interface 50, and the like.

The ROM 34 stores control programs and the like, and the RAM 36 provides a working area.

The hard disk device 38 stores a program dedicated for measuring the behavior of the golf club head 16, classifying the swing, selecting a golf club, and the like.

The disk device 40 is for recording and / or reproducing data to / from a recording medium such as a CD or a DVD.

The keyboard 42 and the mouse 44 accept operation inputs by the operator.

The display 46 is for displaying and outputting data, the printer 48 is for printing out the data, and the data is outputted by the display 46 and the printer 48.

In the present embodiment, the display 46 constitutes a display device of the claims.

The input / output interface 50 is for exchanging data with an external device.

Fig. 8 is a functional block diagram of the computer 14. Fig.

The computer 14 functionally includes a signal processing section 52, an image processing section 54, an analyzing section 56, an estimating section 90, a simulation section 92, a classification map creating section 94, An output unit 62, a storage unit 64, an image forming unit 80, an image output unit 82, and the like.

The signal processing unit 52, the image processing unit 54, the analyzing unit 56, the classifying unit 58, the selecting unit 60, the output unit 62, the image forming unit 80, the image output unit 82 ) Is realized by the CPU 32 executing the dedicated program, but these parts may be constituted by hardware such as a circuit.

The storage unit 64 is constituted by, for example, a hard disk unit 38 or a RAM 36 and stores data (CAD data) D1 of the three-dimensional shape model of the golf club head 16, Information including position information D2, classification map D3, selection information D4, and golf club information D5 is stored.

The information D1 to D5 will be described later.

The signal processing unit 52 is configured to extract the marker feature points 21a, 21b and 21c from the images of the respective markers 20a, 20b and 20c in the image by, for example, , 20c are distinguished from the data values of the other portions by performing the brightness correction and the contrast correction of the image data under predetermined processing conditions and further performing the tone correction of the gradation number Processing is performed.

The image processing unit 54 specifies the positions of the marker feature points 21a, 21b and 21c from the image data of the golf club head 16 during the golf swing and uses this specific position to determine the behavior of the golf club head 16 .

The image processing section 54 includes an extracting section 54a for extracting the position in the three-dimensional coordinate system by specifying the marker feature points 21a, 21b and 21c of the respective markers 20a, 20b and 20c, And a calculating unit 54b for calculating time-series data of the position and direction of the golf club head 16 using the three-dimensional coordinate positions of the marker feature points.

The extraction unit 54a identifies the portion of the image of each of the markers 20a, 20b, and 20c from the image subjected to the gradation process of a predetermined number of gradations and extracts the position.

The marker feature points 21a, 21b, and 21c are detected with respect to the images of the respective markers 20a, 20b, and 20c photographed by the irradiation imaging unit 11 and photographed from different directions at the same time, And the position coordinates in the three-dimensional coordinate system in which the space through which the golf club head 16 passes are obtained by using the position coordinates of the obtained marker feature points 21a, 21b, and 21c, Dimensional coordinate system of the minutiae points 21a, 21b, and 21c.

Next, the position coordinates of the marker feature points 21a, 21b, and 21c with respect to the image of each of the markers 20a, 20b, and 20c in the image photographed from the other direction by the camera 26 Respectively.

The position coordinates of each of the marker feature points 21a, 21b and 21c required are used as positional coordinates of the markers 20a, 20b and 20c, and a three-dimensional coordinate system And extracts the positions of the marker feature points 21a, 21b, and 21c in the three-dimensional coordinate system.

Since the photographing direction of the irradiation photographing section 11 is already existing, by obtaining the information of the two-dimensional position coordinates in the image photographed by the photographing and imaging section 11, (Three-dimensional position coordinates) in a predetermined three-dimensional coordinate system showing a space through which the two-dimensional space 16 passes.

When the images of the respective markers 20a, 20b and 20c are photographed at predetermined time intervals, for example, at intervals of one thousandth of a second, the respective markers 20a and 20b (Center points of the markers) 21a, 21b, and 21c on the image of each of the image points 20a, 20b, 20c, 20c.

In this embodiment, with respect to the image of each of the markers 20a, 20b, and 20c obtained from the respective directions and photographing from two directions using the irradiation image pickup unit 11, the marker characteristic points 21a and 21b , And 21c, the three-dimensional position coordinates are obtained.

Incidentally, in the present embodiment, as shown in Fig. 4, a configuration in which the markers provided on the surface of the golf club head 16 are continuously photographed in two or more directions from different directions, The case of using the irradiation / photographing unit 11 for taking an image has been described.

However, as a configuration for continuously photographing the markers provided on the surface of the golf club head 16 from two or more directions in different directions, a variety of conventionally known various configurations such as using two or more cameras can be used.

The calculating unit 54b calculates the position and direction of the golf club model as time series data from the three-dimensional position coordinates obtained by the extracting unit 54a.

Specifically, in the storage unit 64, data (CAD data) D1 of the three-dimensional shape model of the golf club head 16 and three pieces of data (CAD data) D1 corresponding to the arrangement positions of the marker feature points And corresponding point position information D2 indicating the position of the corresponding point on the 3D shape model.

In other words, the data (CAD data) D1 of the three-dimensional shape model constitutes a three-dimensional shape model reproducing the golf club head, and the corresponding point position information D2 corresponds to the three-dimensional shape The location of the corresponding point on the model.

The calculating unit 54b reads out the data D1 and the information D2 and determines whether the position coordinate in the three-dimensional coordinate system of the corresponding point on the three-dimensional shape model matches the marker minutiae point extracted from the extracting unit 54a The position and direction of the three-dimensional shape model are calculated so as to coincide with the three-dimensional position coordinates of the golf club head 16 and the position and the direction of the three- And is configured to calculate time series data.

9A is a schematic diagram showing a time history of movement of a marker in a time interval of 2000ths of a second determined from the three-dimensional position coordinates of marker feature points, and FIG. 9B is a schematic diagram Fig. 2 is a schematic view showing the behavior of a golf club head based on a time history of movement of a marker to be performed. In the figure, reference numeral 2 denotes a golf ball, and an arrow a shows the direction of movement of the golf club head (the direction of ejection of the golf ball 2). Incidentally, Fig. 9 (b) shows a state in which the golf club head is viewed from above.

In Fig. 9 (a), an axis parallel to the ejecting direction of the golf ball 2 is defined as an X-axis, a shaft perpendicular to the X-axis and parallel to the horizontal plane An XYZ coordinate system with the axis as the Z axis is set in advance.

In FIG. 9A, three plot groups (groups M1 and M2 to M10) showing three markers 20a, 20b and 20c are marked with markers 21b, 21c extracted from the three marker feature points 21a, 21b, 21c.

Further, the golf club head 16 is associated with each of the three respective plot groups M1 and M2 to M10 showing the marker, and the movement of the golf club head 16 as shown in Fig. 9 (b) By continuously displaying, the position of the golf club head 16 and the change in the face direction can be known.

In addition, the position of the golf club head 16 is shown as the representative position of the golf club head 16, with the positional coordinates at the center position of the face surface 1602.

The direction of the face of the golf club head 16 is shown as a normal line passing the center point of the face face 1602. [

The analyzing unit 56 uses the time series data of the position and direction of the calculated golf club head 16, that is, the time series data of the markers 20a, 20b, and 20c, The right and left approach angles of the golf club head 16 and the face angle when hit.

Fig. 10 is a plan view showing a state in which the golf club head 16 immediately before hitting the golf ball 2 is seen from a plane, Fig. 11 is a schematic diagram explaining the definition of the right and left approach angle? Is a schematic diagram for explaining the phase angle (?).

11 and 12, reference numeral 1610 denotes the center position of the face surface 1602 of the golf club head 16. [

As shown in Figs. 10 and 11, a straight line projecting a target line connecting the center of the golf ball 2 and a target on the above-mentioned plane is referred to as a reference line L0.

Here, it is assumed that the reference line L0 is parallel to the X axis, and therefore, the above plane is parallel to the X axis and the Y axis and orthogonal to the Z axis.

A straight line projecting the tangent of the movement locus of the golf club head 16 on a plane parallel to the horizontal plane immediately before striking the golf ball 2 is referred to as a first straight line L1.

The left-right entry angle [theta] is an angle formed by the reference line L0 and the first straight line L1.

A straight line projecting a normal line passing through the center point of the face surface 1602 of the golf club head 16 immediately before striking the golf ball 2 on the above plane is referred to as a second straight line L2).

The face angle? At impact is an angle formed by the reference line L0 and the second straight line L2.

That is, the analyzing unit 56 calculates the angle formed by the reference line L0 and the first straight line L1 from the time-series data of the position and direction of the three-dimensional shape model calculated by the calculating unit 56, ), And the angle formed by the reference line L0 and the second straight line L2 is obtained as the face angle phi when striking.

This will be described in detail.

Since the moving speed of the golf club head 16 decreases immediately after the golf ball 2 is hit, in the time-series data of the position coordinates indicating the movement of the center position 1610 of the face surface 1602 at a predetermined time interval, The moving distance of the position coordinates immediately before and after the impact is sharply shortened compared with the moving distance at each of the previous points.

11, when the position coordinates of the golf club head 16 are shown, the position coordinates of the golf club head 16 immediately before hit of the golf ball 2 (center position (1610)), and one previous position coordinate in time series data.

The straight line L1 connecting these two position coordinates becomes the tangent of the movement locus of the golf club head 16. [

12, when the normal line showing the direction of the golf club head 16 is shown, it is possible to determine from the series data whether or not the golf ball 2 immediately before hitting the golf ball 2 The normal of the face surface 1602 of the club head 16 can be specified.

The analyzing unit 56 specifies the tangent of the movement locus of the golf club head 16 immediately before striking the golf ball 2 and the normal of the face surface 1602 in this way, The right and left entry angles? And the batting face angle? Are obtained in a procedure.

The golf club head 16 has a head speed of 15 mm to 20 mm at a time interval delta of 1 / 2000th of a photographing interval by the camera 26 since the head speed of the golf club head 16 is usually 30 to 50 m / Move it 25mm.

Thus, two pieces of time series data (position coordinate data) are specified in the range of 50 mm in the direction opposite to the direction of ejection of the golf ball 2 along the X-axis direction from the center of the golf ball 2.

Therefore, in this embodiment, the left and right entry angles? And the batting face angle? Are obtained based on the time-series data in the range of 50 mm from the center of the golf ball 2.

In addition, the photographing interval by the camera 26 is not limited to 1/2000 seconds, and it is only necessary to be able to obtain the left and right entry angle [theta] and the batting face angle [phi] based on the obtained time series data. , And the photographing interval may be set between 1/10000 sec and 1/500 sec.

In the present embodiment, the right and left entry angles? Are set to positive (positive) on the opposite side of the golfer with respect to the reference line L0, and negative (negative) on the golfer's side.

Similarly, with respect to the batting face angle at the time of hitting, the opposite side of the golfer is defined as positive (positive) around the reference line L0, and the golfer side is defined as a negative angle.

The estimating section 90 estimates the left and right throw angle alpha and the side spin amount Ss of the golf ball from the measured values of the left and right approach angle [theta] and the hit face angle [phi].

The left-right strike angle alpha refers to an angle formed by a line projected on the plane of the trajectory of the golf ball immediately after being hit by the golf club head 16 of the golf club swung by the golfer and the reference line L0.

The positive and negative sides of the right and left launching angles? Are set such that the opposite side of the golfer is a positive angle with respect to the reference line L0 and the golfer side is a negative angle.

Fig. 13 is a graph showing the relationship between the right and left entry angles? On the horizontal axis (X axis) and the face angle? On the vertical axis (Y axis) (?) are arranged on the surface of the substrate.

In addition, the specific numerical values of the data are omitted. The case where the angles of the right and left entry angles [theta] and the face angle [phi] when striking changes in units of 0.5 degrees is exemplified, but it is arbitrary such that the unit of angles is smaller than 0.5 degrees.

The hatching portion corresponds to the left and right launching angle alpha of 0 degree and the range above the hatching portion is the positive (right) direction of the left and right range and the range below the hatched portion is the left and right launching angle alpha ) Is the sound (left direction) (when the golfer is the right hand).

The side spin amount Ss refers to the amount of spin around the vertical line passing through the center of the golf ball 2 of the golf ball 2 immediately after being hit by the golfer's golf club head 16 swung by the golfer.

The positive sound of the side spin amount Ss is positive in the clockwise direction as viewed from the plane and negative in the counterclockwise direction.

The estimating unit 90 specifies the left and right launching angles? From the measured values of the left and right approach angles? And the batting face angle? Based on the first regression formula The side spin amount Ss is specified from the measurement values of the left and right entry angles? And the batting face angle? Based on the regression equation.

14 is a graph showing the relationship between the angle of incidence θ on the horizontal axis (X axis) and the pitch angle φ on impact on the vertical axis (Y axis) from 0 degree to 0.5 degree in positive increments, (Ss) are arranged as shown in Fig.

In addition, the specific numerical values of the data are omitted. 13, it is arbitrary to make the angle unit smaller than 0.5 degrees.

The side spin amount Ss is positive and the range below the hatched portion is the range in which the side spin amount Ss is negative Hook tendency) (when the golfer is a right-handed golfer).

The first regression equation and the second regression equation are prepared as follows.

The left and right entry angles? Of the golf club head 16 of the golf club actually swung by the golfer and the face angle? At the time of hitting are actually measured by the procedure described above.

Then, at this time, the left-right launch angle [alpha] and the side spin amount Ss of the golf ball 2 immediately after being hit by the golf club head 16 and being driven are measured by a reference measuring instrument. As such a standard measuring instrument, for example, various conventionally known measuring devices as disclosed in Japanese Patent No. 4104384 can be used.

The data of the left and right entry angles?, The batting face angle?, The left and right throwing angles?, And the side spin amounts Ss are obtained by performing such a measurement a plurality of times (times) by a plurality of golfers.

Then, the left and right launching angles? From the left and right entry angles? And the batting face angles? Based on actual measured values of the left and right entry angles?, The batting face angles? And the left and right launching angles? A first regression equation is specified.

The side spin amount Ss is calculated from the right and left entry angles? And the batting face angle? Based on actual measured values of the left and right entry angles?, The batting face angle? And the side spin amounts Ss A second regression equation is specified.

In addition, the first regression equation is expressed as follows, for example.

(B1) + integer (c1) < tb > < SEP >

The second regression equation is expressed, for example, as follows.

Side spin amount Ss = left and right approach angle? Coefficient a2 + face angle phi x coefficient b2 +

The coefficients a1, a2, b1 and b2 and the constants c1 and c2 depend on the bulge of the club head, the presence or absence (large or small) of the roll, and the magnitude of the moment of inertia.

Incidentally, the forms of the first and second regression equations are not limited to the illustrated ones, and various conventionally known regression equations can be employed.

The estimating unit 90 holds (holds) the first regression equation and the second regression equation. The estimating unit 90 may be configured to calculate the first map for specifying the left and right launching angles? From the left and right entry angles? And the battering face angles? Instead of the first regression equation and the second regression equation, It is also possible to provide a second map for specifying the side spin amount Ss from the entry angle? And the batting face angle?.

The simulation unit 92 calculates the golf ball 2 based on the estimated left and right launch angle a and side spin amount Ss and the ball initial velocity V0 of the golf ball 2 and the up- (Trajectory) of the ball 2 to calculate the shift amount? S, which is the distance from the reference line L0 to the landing point.

The upper and lower launching angles beta are formed by projecting the trajectory of the golf ball 2 immediately after being hit by the golf club head 16 of the golf club swung by the golfer to a vertical plane including the reference line L0, (L0).

In addition, a predetermined fixed value corresponding to the golfer's attributes can be used as the ball initial velocity V0 and the vertical strike angle beta. The properties of a golfer are classified into a physique (muscle strength) or a high or low level of skill called male professional golf, male amateur golfer, female professional golfer, female amateur golfer.

In the simulation, it is also possible to consider the back-spin amount Sb of the golf ball 2 immediately after being hit by the golf club head 16 of the golf club swung by the golfer, and the back-spin amount Sb ), Which is advantageous in increasing the degree of accuracy of the simulation.

In addition, it is not possible to set the ball speed (V0), the vertical launch angle (?), And the back spin amount (Sb) as fixed values. The ball speed V0, the vertical launch angle ), And it is advantageous in increasing the degree of simulation by using the measured values of these.

The classification map creating unit 94 stores data consisting of the left and right entry angles? And the face angle? And the shift amounts? S at the time of hitting and calculates the left and right entry angles? The intersection of the X axis and the Y axis which is orthogonal to the X axis and represents the face angle (φ) when striking them and the X axis and the Y axis is defined as a distance between the right and left entry angles θ and the face angle A classification map defining a plurality of areas divided in accordance with a tendency of the ball to fly specified on the basis of the left-right entry angle [theta], the batting face angle [phi] and the shift amount [ (D3).

The classification map D3 is stored in the storage unit 64. [ In addition, it is optional to place the classification map D3.

The relationship between the left-right approach angle? And the face angle? At impact and the direction in which the ball of the golf ball 2 is blown will be described.

Since the trajectory of the golf club head 16 shows an outward tendency as the left and right entry angles? Are negative values and the absolute value thereof becomes larger, the ejected golf ball 2 is driven in the leftward direction do.

Since the trajectory of the golf club head 16 shows an inside-out tendency as the left-right entry angle [theta] is a positive value and the absolute value thereof becomes larger, the ejected direction of the shot golf ball 2 becomes the rightward direction.

As the face angle phi during the striking is negative and the absolute value of the face angle phi is negative, the shot golf ball 2 is more likely to take a side spin of counterclockwise rotation as viewed from above.

As the face angle φ at the time of striking is a positive value and the absolute value of the face angle φ is larger, the shot golf ball 2 is more likely to take a side spin in the clockwise direction as viewed from above.

By the combination of the right and left entry angles? And the face angle? At the time of impact, it is affected by the fact that the right and left sides of the golf ball 2 and the side spins are easily caught, (2) is a direction in which the balls of slice tendency, fade tendency, straight tendency, draw tendency, and hook tendency fly.

Here, the slice tendency means that the golf ball 2 is bent to the right when a right-handed golfer hit the golf ball 2. [ In the case of left-handed golfers, it refers to bending to the left.

The fade tendency means a controlled slice tendency and means that the landing position of the golf ball 2, which is shot to the left with respect to the target line, returns to the target line.

The hook tendency means that the golf ball 2 warps to the left when a right-handed golfer hit the golf ball 2. In the case of a left-handed golfer, it means to bend to the right.

The drag tendency means a controlled hook tendency and means that the landing position of the golf ball 2, which has been driven to the right with respect to the target line, returns to the target line.

In addition, the straight tendency means that the shot golf ball 2 goes straight without bending.

As described above, the direction (trajectory) of the ball 2 of the golf ball 2 varies in accordance with the behavior of the golf club head 16 just before hitting the golf ball 2.

Further, the smaller the shift amount? S obtained by the simulation, the closer the approaching point is to the reference line L0 and the preferable ball is flying. The larger the shift amount? S, The ball is evaluated in the direction in which it is flying.

The classification map D3 represents the two-dimensional coordinates in which the left and right entry angles? Are values of the X coordinate, the face angle? At the time of the hitting is the value of the Y coordinate, Are divided into a plurality of areas (areas) corresponding to the direction in which the ball of the golf ball 2 is to be blown.

In other words, the classification map D3 has an X-axis representing the left-right entry angle [theta] and a Y-axis orthogonal to the X-axis and representing the face angle [phi] at impact, and the intersection point of the X- A plane appearing on a two-dimensional coordinate axis at zero of the entering angle? And the face angle? At impact is divided into a plurality of areas (regions) corresponding to the ball flying direction of the golf ball 2.

The plurality of areas are divided in accordance with the tendency of the ball to fly, which is specified based on the left-right entry angle [theta], the face angle [phi] at the time of hitting, and the shift amount [Delta] S.

The swing of the golf club by the classifying unit 58 is specified using the classification map D3.

Fig. 15 is a schematic diagram for explaining the configuration of the classification map D3. Fig. 15 is a schematic diagram for explaining the configuration of the classification map D3, in which the left and right entry angles? And? 0.5 degree unit, and data of the shift amount? S is arranged at each coordinate point. In the figure, specific numerical values of the data are omitted. Incidentally, in the following, it is assumed that the golfer is a right-handed golfer, and in the case of left-handed golfer, the golfer's right hand is opposite.

More specifically, as shown in Fig. 15, the classification map D3 is composed of a slice area A1 and a fade area A1 corresponding to a combination of a left-right approach angle [theta] and a face angle [ Five areas corresponding to the direction in which the ball of the golf ball 2 called the straight area A 2, the straight area A 3, the draw area A 4 and the hook area A 5 fly is associated with each other.

The slice area A1 is an area in which the direction in which the ball is blown is a slice tendency. The fade area A2 is an area in which the direction in which the ball is faded tends to fade. In the straight area A3, And the draw area A4 is an area in which the direction in which the ball is blown tends to draw. The hook area A5 is an area in which the direction in which the ball is blown is a hook tendency.

In other words, depending on whether the combination of the left-right entry angle [theta] and the face angle [phi] at impact corresponds to one of the areas A1 to A5, the swing type of the golf club may be slice type, fade type, Type, and hook type.

That is, the classifying section 58 classifies the golf swing into a plurality of types stored in the classifying map D3 based on the left-right entry angle [theta] obtained by the analyzing section 58 and the face angle [phi] And specifies which type corresponds to which type.

In addition, the slice area A1, fade area A2, straight area A3, draw area A4, and hook area A5 on the classification map D3 are determined as follows.

16 is a schematic diagram for explaining each area and a boundary line.

Fig. 16 is a graph showing the relationship between the right and left entry angles? On the horizontal axis (X axis) and the face angle? On the vertical axis (Y axis) And the data of the shift amount? S is arranged at the coordinate point. In the figure, specific numerical values of the data are omitted.

The hatched portion indicated by the reference character LA is the first boundary line, the landing point is on the reference line L0, and the shift amount? S is zero.

Further, the hatched portion shown by reference numeral M1 indicates that the landing point is located on the right side with respect to the reference line L0, and the shift amount? S is larger than 0 and less than 10 yards.

The hatched portion indicated by reference numeral M2 indicates that the landing point is located on the left with respect to the reference line L0 and the shift amount? S is in the range of 0 to 10 yards.

The portion indicated by reference character LB is the second boundary line, and the side spin amount Ss corresponds to 0 rpm (straight area A3). The second boundary line LB intersects the first boundary line LA on the two-dimensional coordinate represented by the X axis and the Y axis and has a slope of a positive slope larger than that of the first boundary line LA.

The portion denoted by symbol M3 indicates a positive value of the side spin amount Ss and a range of 0 rpm to 500 rpm.

The portion indicated by reference symbol M4 has a negative value of the side spin amount Ss and shows a range of 0 rpm to 500 rpm.

In addition, the upper limit value, the lower limit value, the upper limit value and the lower limit value of the shift amount? S are not limited to the above numerical values but arbitrarily set.

Of the two areas sandwiched by the first boundary line LA and the second boundary line LB, the area located on the positive direction side of the X axis and the Y axis is the draw area A4.

Of the two regions sandwiched by the first boundary line LA and the second boundary line LB, a region located on the negative direction side of the X axis and the Y axis is the fade area A2.

The slice area A1 is located on the positive side of the draw area A4 and the fade area A2 on the Y axis.

The hook area A5 is a region located on the Y-axis negative direction side of the draw area A4 and the fade area A2.

And the portion of the second boundary line LB is the straight area A3.

In this embodiment, in addition to classifying the direction in which the ball is blown into the above five kinds, the direction in which the ball is blown is evaluated by the shift amount? S.

First, the shift amount? S is set to a direction in which a ball having a good range of 0 yard ± 10 yards is blown.

Therefore, in FIG. 16, a region coinciding with a range of 0 yard ± 10 yard, that is, a region denoted by reference numerals M1, LA, and M2 is evaluated as a direction in which a good ball is blown.

In addition, in the case where the side spin amount Ss is large even when the shift amount? S is within ± 10 yds, and therefore the movement trajectory of the golf ball 2 is greatly curved, And the area indicated by reference numerals M3 and M4, that is, the shift amount? S is within ± 10 yards and the side spin amount Ss is within a range from 0 rpm to 500 rpm in the areas denoted by reference numerals M1, We evaluate as direction in which better ball flows.

Even if the shift amount? S is within ± 10 yds and the spin amount is below 500 rpm, the movement trajectory of the golf ball 2 viewed from the plane is once convex to the right (left side) of the reference line L0, (Right side) of the opposite side beyond the reference line L0, the technical evaluation as a golf game is lowered as compared with a case where the golf ball is hit without exceeding the reference line L0.

Therefore, the movement locus of the golf ball 2 when viewed from the plane is curved so as to project to the right (left side) of the reference line L0 once, and does not exceed the reference line L0, When the ball is hit, the evaluation of the direction in which the ball is blown is good.

16, the shift amounts? S are 0 yd ± 10 yds, and the side spin amount Ss is in a range of 0 rpm to 500 rpm. However, in the region indicated by reference numerals N1 and N2, The movement locus of the ball 2 corresponds to the direction in which the ball flying over the reference line L0 is flying.

Therefore, in regions indicated by reference numerals M1, L1, and M2 in FIG. 16 and also in regions indicated by reference numerals M3 and M4 except for regions N1 and N2 in which the ball over the reference line L0 flows, The remaining regions O, P (regions surrounded by thick lines) are evaluated as the direction in which the ball is best traveled.

In this embodiment, it is assumed that the area indicated by symbols O and P in the fade area A2, the draw area A4, and the straight area A3 is the direction in which the best ball flows.

In addition, it is optional to adopt any of the following three types of evaluation, but the area occupied by the ball on the classification map D3 in the direction in which the ball is estimated to be good in order of 1), 2), 3) , The evaluation becomes more stringent.

1) Evaluate the area indicated by the symbols M1, L1 and M2 (the side spin amount Ss is in a range from 0 rpm to 500 rpm) as a direction in which a good ball flows.

2) In a region denoted by reference numerals M1, L1 and M2 and also in regions indicated by reference numerals M3 and M4 (the shift amount? S is within ± 10 yds and the side spin amount Ss is within a range from 0 rpm to 500 rpm) As a direction in which a good ball flows.

3) The remaining areas except the areas N1 and N2 in which the balls exceeding the reference line L0 fly in the areas shown by the symbols M1, L1 and M2 and the areas indicated by the symbols M3 and M4 O, P) as the direction in which good balls fly.

Referring to Fig. 15, hatching is performed on a portion of the fade area A2, the draw area A4, and the straight area A3 that is evaluated as good in the flying direction of the ball. Incidentally, in order to simplify the drawing, the straight area A3 is shown in a straight line.

In addition, the first boundary line LA, the second boundary line LB, and the respective areas A2, A3, and A4 vary depending on the number of golf club heads 16, the attributes of the golfer, and the like. This will be described with reference to Figs. 17 to 22. Fig. 17 to 22, the illustration of the first boundary line LA is omitted.

17 to 19 show an example of a classification map D3 in the case where the golf club is a driver. Fig. 17 shows a classification map D3 in the case where the golf club is a driver, 19 is a female amateur (first speed V0: 45 m / s, upper and lower launch angle (?): 15 degrees, back spin amount (Sb): 2500 rpm) The launch angle beta: 17 degrees, and the back spin rate Sb: 2200 rpm).

20 to 22 show an example of a classification map D3 when the golf club is a 7 iron; Fig. 20 shows a classification map D3 when the golf club is a 7 iron; Fig. (Sb): 6000 rpm), FIG. 21 shows a male amateur (first speed V0: 46 m / s, upper and lower launch angle (?): 19 degrees and backspin , A vertical launch angle (?) Of 20 degrees, and a back spin rate (Sb) of 4000 rpm).

As shown in Figs. 17 to 22, it can be seen that the shapes and areas of the respective areas are different between the driver and the 7th iron.

As the ball velocity V0 increases, the area of the area to be evaluated as a direction in which a good ball is blown is narrowed. The angle of incidence θ and the angle of attack at the time of batting, which are necessary for obtaining a good ball flying direction, Is narrowed.

In addition, since the positions and areas of the respective areas on the classification map D3 vary depending on the cause attributable to the selection device 10, the classification map D3 is created in accordance with the selection device 10 do.

Strictly speaking, the inclination of the first and second boundary lines LA and LB is determined by the influence of the ball of the face surface 1602 of the golf club head 16 and the moment of inertia of the golf club head 16 It changes slightly.

Fig. 23 is a diagram showing a display example of the simplified classification map D3.

23, the fade area A2 and the draw area A4 are shown in the shape of an ellipse for the sake of simplicity and visibility of the respective areas. A part of the fade area A2 overlaps the draw area A4, The fade area A2 and the draw area A4 are projected outward to the outside of the first and second boundary lines LA and LB. However, strictly speaking, as shown in Fig. 15, The draw area A4, and the first and second boundary lines LA and LB do not overlap each other.

In the upper part of Fig. 23, an arrow F1 showing the moving direction of the golf club head 16 with respect to the reference line L0 is shown, schematically showing the left-right approach angle [theta].

An arrow F2 showing the direction of the face surface 1602 of the golf club head 16 is shown on the left side of Fig. 23, and schematically shows the face angle phi when hit.

Further, the area of the fade area A2, the draw area A4, and the straight area A3 can be increased or decreased depending on which of the above-mentioned three types of evaluation is employed.

The classifying unit 58 uses the classifying map D3 to determine which of the plurality of types the swing of the golf club corresponds to, based on the left-right entry angle [theta] and the face angle [phi] .

The selecting unit 60 selects an optimum golf club according to the type specified by the classifying unit 58. [

In the present embodiment, the selection information D4 related to the type of swing of the golf club and the optimum golf club for that type is prepared in advance. Specifically, the selection information D4 is stored in the storage unit 64 . In addition, it is arbitrary to store the selection information D4.

The selection information D4 is the information related to the type of swing of the golf club and the optimum golf club for that type.

The selection information D4 is arbitrary, for example, such as the type of swing of the golf club and the data table associated with the optimum golf club for the type.

That is, an optimum golf club for the type is an advantageous golf club for correcting the direction in which the ball is blown when the golf ball 2 is hit with the swing of that type.

The selecting unit 60 selects an optimum golf club from the selection information D4 based on the type of swing of the golf club specified by the classifying unit 58. [

As a golf club (in other words, a golf club associated with the type of swing of the golf club in the selection information D4) selected by the selection unit 60, Which is obtained by variously setting the center distance and the central angle.

That is, at least one of the center distance and the central angle of the golf club head 16 optimal for each of the above types is different.

In addition, the center distance of the golf club head 16 refers to the distance from the center point G of the golf club head 16 to the center axis S of the golf club shaft (shaft axis) Refers to the distance L of the shortest straight line when the shortest straight line reaching the extended line of the straight line S is defined.

The central angle refers to the distance between the shortest straight line and the extension line of the center axis S or the center axis S of the golf club shaft from the vertical direction toward the horizontal plane Refers to an angle α formed between the shortest straight line and the extension line of the center axis S or the center axis S of the golf club shaft. That is, the central angle alpha is an angle showing the direction of the shortest straight line.

By changing the value of the center distance L to large or small according to each of the above types, it can be said that it is appropriate for each of the above types.

In other words, the golf club head 16 having a small center distance L is selected as the type corresponding to the slice area A1 and the type corresponding to the hook area A5 is selected as the center distance L having a large center distance L (Long) golf club head 16 is selected.

In addition, in clarifying the range of the difference in the center distance L between the golf club heads 16, the difference in the center distance L between the golf club heads 16 is 3 mm to 10 mm .

Further, by changing the value of the central angle alpha to large or small according to each of the above types, it can be said that it is appropriate for each of the above types.

In other words, the type corresponding to the slice area A1 selects the golf club head 16 having a large central angle alpha and the type corresponding to the hook area A5 is the golf club head 16 having the small center angle alpha ).

The above-mentioned center distance L can be obtained, for example, as follows.

As shown in Fig. 25 (a), is measured by a seesaw type balance system 70 capable of swinging about the point 71 in the direction of the arrow U.

The balance table 70 has a shaft pin 72 having a fitting with no gap with respect to the hole of the hosel of the golf club head 16 and a state in which the golf club head 16 is not mounted The arm 73 is balanced so as to be horizontal.

The measurement of the center distance L from the golf club shaft axis of the center G of the golf club head 16 is carried out by measuring the center distance L from the golf club shaft axis of the golf club head 16, The club head 16 is mounted and fixed. Then, a precision balance is placed at a predetermined position L 'so that the arm 73 is horizontally balanced, and the load when the balance system 70 is balanced is measured.

This load W ', which adjusts the direction of the golf club head 16 mounted on the shaft pin 72 so as to maximize the load, and obtains the load W' L = (W 'x L') / W is calculated from the equation of balance. This calculated value is the center distance (L).

It has been described above that the wood-based golf club head 16 that is optimum for each of the above-mentioned types is prepared and selected by adjusting the center distance L and the central angle alpha. However, instead of the center distance L, The center distance FGL on the surface 1602 may be used.

Here, the "center distance (FGL) on the face surface 1602" will be described.

As shown in Figs. 26A and 26B, the "center distance (FGL) on the face surface 1602" is a line perpendicular to the face surface 1602 passing through the center G The point g that intersects the face surface 1602 and the extended line of the center axis S or the center axis S of the golf club shaft is extended to the face face 1602 or the face face 1602 Refers to the shortest distance between a line projected on one side and a line projected on one side.

The point (g) can be detected using a conventionally known center measuring instrument. For example, the method described in paragraphs 0028 to 0030 of Japanese Patent No. 4233886 can be used. In other words, the point (g) is arbitrary if the perpendicular line L1 intersecting the face surface 1602 passing through the center G crosses the face surface 1602.

By changing the value of the center distance FGL on the face surface 1602 to large or small according to each of the above types, it can be said that it is appropriate for each of the above types.

In other words, in the type corresponding to the slice area A1, the golf club head 16 having a small (short) center distance FGL on the face surface 1602 is selected, and the golf club head 16 corresponding to the hook area A5 Type selects a golf club head 16 having a larger (longer) center distance FGL on the face surface 1602. [

Further, as described in Japanese Patent Application Laid-Open No. 2006-247045, when the grip angle? In the golf club is determined, the grip angle? Can be used instead of the central angle?.

Here, the "grip angle?" Will be described.

Fig. 27 (a) is a perspective view of the iron-based golf club 4. Fig.

The golf club 4 includes a golf club shaft 5, a golf club head 16 mounted on the distal end of the golf club shaft 5, and a rear end And a grip 7 mounted on the base portion.

Fig. 27 (b) is a sectional view of the golf club 4 when it is cut along the line X-X 'shown in Fig. 27 (a).

A grip 7 is provided so as to surround the periphery of the golf club shaft 5 and a partially protruding protrusion is provided on a part of the outer periphery of the grip 7.

This projection is provided at the same circumferential position in the longitudinal direction of the golf club shaft 5 to form the back line 7A.

27 (c), a portion of the inner circumferential surface of the grip 7 before attachment constitutes a flat portion 7B, and the golf club shaft 5 is formed as a flat portion 7B, The back line 7A is formed in a convex shape.

The back line 7A is a specific portion for specifying the mounting direction when the grip 7 is mounted on the golf club shaft 5. [

The grip angle beta is information indicating the mounting direction of the specific portion (back line 7A) with respect to the direction of the face surface 1602 of the golf club head 16. [

In addition, the specific area is not limited to the back line 7A but may be a visible mark formed on the surface of the golf club shaft 5 or the surface of the grip 7.

For example, as shown in Figs. 30 (a) and 30 (b), when the holding position mark 7C indicating the holding position where the thumb of the right and left hands is held is held by the grip 7 , The position mark 7C to be held by these members may be a specific portion.

Fig. 28 (a) is a front view for explaining a state in which the golf club 4 is installed at a normal address position, and Fig. 28 (b) is a plan view.

Figs. 29A, 29B, and 29C are views for explaining the relationship between the grip angle? And the direction of the face surface 1602 of the golf club 4.

More specifically, as shown in Figs. 28 (a) and 28 (b), the grip angle? Is set such that the golf club 4 is placed on the horizontal reference plane B (horizontal plane) As shown in Figs. 29 (a), (b) and (c), in the cutting plane when the golf club shaft 7 and the golf club shaft 5 are cut perpendicularly to the center axis S, A straight line L2 passing through the center axis S from the circumferential position around the golf club shaft 5 in which the golf club head 7A is mounted and a horizontal line (a straight line parallel to the score line) on the face surface 1602 of the golf club head 16, Refers to the angle formed by the direction of the straight line L2 with respect to the direction of the projection line H1 when the projection line H1 when the projection line H1 is projected onto the above cut plane is defined.

Therefore, when the straight line L2 and the projection line H1 are parallel to each other, the grip angle? Is 0 degree.

The horizontal line on the face surface 1602 of the golf club head 16 is a plane surface parallel to the reference plane B in a state in which the golf club 4 is installed at the normal address position 1602 < / RTI >

This horizontal line is generally substituted by a straight line parallel to the score line 1630 or the score line 1630.

The score line 1630 is set as shown in the reference of the face surface 1602.

When the score line 1630 is not in a straight line, a line that is parallel to the reference plane B on the face surface 1602 is set as a target So that a horizontal line on the face surface 1602 can be formed.

The reason for installing the golf club 4 at the normal address position is that the golf club head 16 is installed at a lie angle and the center of gravity Refers to setting the axis S and the leading edge 1620 so as to be parallel to each other or parallel to the score line 15.

In addition, when the score line 1630 is not in a straight line, the fact that the center axis S and the leading edge 1620 are parallel to each other indicates that the face angle is in the 0 degree state.

In the present embodiment, the grip angle? Is set such that the direction in which the face face 1602 is closed with the center at 0 degrees being a negative angle and the direction in which the face face 1602 is opened is defined as a positive Angle.

It can be said that it is appropriate for each of the above types by changing the magnitude of the absolute value of the grip angle &thetas; according to each of the above types.

In other words, in the type corresponding to the slice area A1, the golf club head 16 in which the grip angle? Is negative (the face surface 1602 is closed) is selected, and the type corresponding to the hook area A5 The golf club head 16 having a positive grip angle? (Face face 1602 is opened) is selected.

Since the golfer grips the golf club on the basis of a mark or a mark displayed on the grip when gripping the golf club, by changing the grip angle [beta], the golf club head The direction in which the face surface 1602 of the golf ball 16 faces and the direction in which the face surface 1602 moves immediately before the hit of the golf ball 2 change. Therefore, it is possible to provide an optimum golf club according to each of the above types.

As the golf club to be selected by the selection unit 60, it is preferable to use a variety of settings of the face progression of the golf club head 16. [

As shown in Fig. 26, the face progression (FP) is a distance from the center axis S to a position C at the most distal end of the golf club head 16. That is, the face progression FP is the distance from the center axis S to the leading edge, which is the portion where the face surface 1602 and the sole portion 1604 contact with each other.

It can be said that it is appropriate for each of the above types by changing the face progression (FP) to a large or small according to each of the above types.

In other words, the type corresponding to the slice area A1 selects the golf club head 16 with a small face progression (FP), and the type corresponding to the hook area A5 corresponds to the golf club head with a large face progression (FP) (16).

In addition, the small golf club head 16 with a face progression is referred to as a goose neck or offset.

When the golf club selected by the selecting unit 60 is a wood type, it is preferable to use one obtained by variously setting the face angle of the golf club head 16.

In the present embodiment, the face angle is defined as a negative (positive) direction in which the face face 1602 is closed, with the direction in which the face face 1602 closes at an angle of 0 degrees, and the direction in which the face face 1602 opens .

That is, it can be said that it is appropriate for each of the above-mentioned types by changing the positive and negative values of the face angle of the golf club head 16 and the magnitude of the absolute value thereof according to each of the above types.

In other words, the type corresponding to the slice area A1 selects the golf club head 16 with the face angle being negative (the face face 1602 is closed), and the type corresponding to the hook area A5 is the face angle (The face surface 1602 is open) of the golf club head 16 is selected.

In other words, the golf club head 16 of the hook face is selected as the type corresponding to the slice area A1, and the golf club head 16 of the slice face is selected as the type corresponding to the hook area A5 .

When the golf club to be selected by the selecting unit 60 is a iron type, it is preferable to use one obtained by variously setting the lie angle of the golf club head 16.

In other words, the type corresponding to the slice area A1 selects the golf club head 16 with the lie angle upright, and the type corresponding to the hook area A5 is the golf club head 16 with the lie angle flat. (16).

As the golf club selected by the selecting unit 60, those obtained by variously setting the lie angle of the golf club are used.

More specifically, FIG. 31 is a graph showing a change in the face angle? At the time of hitting when the lie angle of the golf club is changed. As a golf club, a driver, a 5 iron, a 7 iron, It is measured with respect to the sand wedge.

That is, since the loft angle is set in the golf club head 16, the direction of the face face 1602 (the direction of the normal line of the face face 1602) changes to the left and right due to the change of the lie angle. Further, a club having a large loft angle has a large change in the direction of the normal line of the face surface 1602. [

Accordingly, when the lie angle adjustable golf club is used, a golf club capable of correcting the direction in which the ball is blown is selected by adjusting the lie angle in the following procedure and adjusting the face angle at impact .

1) We perform test with a standard lyre's golf club.

2) As shown in Fig. 23, the measurement point P1 is plotted on the classification map D3.

In this case, since the measurement point P1 corresponds to the hook area A5, the face angle phi when hit can be adjusted in the positive direction so that the measurement point P1 can move to the draw area A4.

3) Therefore, when the lie angle is adjusted in the direction of lowering to the toe side, the normal line of the face surface 1602 is directed to the right in the relation of the loft angle, in other words, the face angle during impact can be changed in the + direction .

4) The lie angle is adjusted to the adjusted golf club.

23, the measurement point P2 after the lie angle adjustment is plotted on the classification map D3.

It is confirmed that the direction in which the ball is blown enters the draw area A4 (optimum ballistic area) and the direction in which the ball is blown is corrected.

That is, in the above procedure, the selecting section 60 selects a lie angle golf club which is suitable for correcting the direction in which the ball is blown by adjusting the face angle phi in the + direction (or - direction) at the time of hitting.

23 is a schematic diagram showing the degree of adjustment of the lie angle when the lie angle of the golf club head 16 is adjusted and a schematic diagram showing the change of the face angle at the time of hitting at the positions of the measurement points P1 and P2 As shown in Fig.

These golf clubs are also equipped with a display medium such as a seal or a tag that is attached to a golf club with information of an optimum one of the above types, that is, It is desirable that it is presented. A golfer can select a golf club suitable for his / her golf swing from among a plurality of golf clubs based on the display medium.

The output unit 62 displays information for specifying the selected golf club in the selection unit 60, that is, the golf club information D5 on the screen by the display 46 or by the printer 48 Prints on a print medium and outputs. Alternatively, the golf club information D5 is output to the disc recording medium via the disc device 40, or output to the external device via the input / output interface 50. [

The golf club information D5 is stored in advance in the storage unit 64 and the output unit 62 outputs the golf club information D5 corresponding to the golf club on the basis of the golf club selected by the selection unit 60 From the storage unit 64 and outputs it. In addition, it is arbitrary to store golf club information D5.

The information of the golf club includes various information such as the name of the golf club, the product number, various specifications, appearance, photographs, and the like.

The image forming unit 80 reads out the data of the classification map D3 read from the storage unit 64 and the data of the right and left approach angle θ and the hit face angle φ supplied from the analysis unit 56 Image data for display display is formed based on the data of the measurement point, and image data for printer output is formed.

In addition, the measurement point may be one data obtained by one measurement, and may be an average value of N data obtained by measurement N times (N is a natural number of 2 or more).

When the measurement point is an average value of N pieces of data, it is advantageous in suppressing unevenness of the measurement point.

Incidentally, such calculation of the average value may be performed by the analyzing unit 56 or the image forming unit 80, and it may be performed anywhere.

The image output section 82 supplies the image data for display display supplied from the image forming section 80 to the display 46 to display the characteristic of the swing of the golf club on the display screen of the display 46 .

The image output section 82 supplies image data for printer output supplied from the image forming section 80 to the printer 48 so as to print the characteristic of the swing of the golf club on the paper as the recording medium Thereby creating a display chart of the swing.

The display screen displayed on the display 46 by the image forming unit 80 and the image output unit 82 and the display screen created by the printer 48 are the same as those shown in Fig. 23 .

The display screen of the display 46 and the display chart created by the printer 48 are displayed on the X axis representing the left and right entry angle [theta] and the Y axis representing the face angle [phi] Dimensional coordinate axes, a first boundary line LA, a second boundary line LB, various areas A1 to A5, and measurement points are displayed.

Next, the operation of the golf club selection device 10 will be described.

The selection device 10 includes an operation of creating a classification map D3, an operation of displaying the characteristics of the swing of the golf club by the golfer on the display, an operation of creating a display diagram showing the characteristics of the swing, An operation of selecting a club is performed.

Hereinafter, the operation of creating the classification map D3, the display operation of the characteristics of the swing and the operation of creating the display diagram, and the selection operation of the golf club will be sequentially described.

First, the operation of creating the classification map D3 will be described.

Fig. 32 is a flowchart for explaining the operation of creating the classification map D3 of the golf club selection device 10. Fig.

When the golfer swings the golf club to hit the golf ball 2 placed on the tee and the controller 12 detects the golf club head 16 by the detector 1202, And the image data is stored in the buffer memory 1204 (step S100: photographing step).

The image data is supplied to the image processing section 54 through the signal processing section 52, and each marker feature point is extracted from the image data by the extraction section 54a (step S102: extraction step).

The calculation section 54b calculates the three-dimensional data D1 (three-dimensional shape model) reproduced from the golf club head 16 stored in the storage section 64 and three Based on the corresponding point position information D2 indicating the position of the corresponding point on the 3D shape model so that the position of the corresponding point coincides with the position in the three dimensional coordinate system of three or more marker feature points extracted by the extraction unit 54a, And the position and direction of the 3D shape model are reproduced to calculate time-series data of the position and direction of the three-dimensional shape model reproducing the behavior of the golf club head 16 (step S104: calculation step).

Next, the analyzing section 56 obtains the left and right entry angles? And the heading face angle? From the time series data of the position and direction of the three-dimensional shape model (step S106: analysis step).

Next, the estimator 90 estimates the left and right launch angle [alpha] and the side spin amount Ss from the measured values of the left and right approach angle [theta] and the batched face angle [phi] (step S108: ).

The estimation of the left and right launch angle alpha and the side spin amount Ss by the estimating step is performed by a first regression equation that specifies the left and right launch angle alpha from the above described left and right entry angle [ And a second regression equation for specifying the side spin amount Ss from the entry angle [theta] and the batting face angle [phi].

Next, the simulation unit 92 calculates the difference between the estimated left and right throw angle alpha and the side spin amount Ss, the ball speed of the golf ball 2, and the up and down angle of the golf ball 2 Simulation of the movement trajectory of the golf ball 2 is performed to calculate the shift amount? S, which is the distance from the reference line L0 to the landing point (step S110: simulation step).

By repeating the steps S10 to S20, data consisting of the left and right approach angle?, The face angle? And the shift amount? S at the time of striking are accumulated (step S112: classification map generating step).

An X-axis representing a left-right entry angle (?) And a Y-axis orthogonal to an X-axis and representing a face angle (?) When striking are defined. The intersection of the X- The two-dimensional coordinate axes at which the face angle phi is zero are set and the two-dimensional coordinate axes at which the ball specified in accordance with the left and right entry angles?, Hit angle? And shift amounts? A classification map D3 in which various areas are defined is created by setting a plurality of boundaries A1 to A5 on the two-dimensional coordinate axes according to the tendency (step S114: classification map creation step). The created classification map D3 is stored in the storage unit 64. [

Thus, the creation of the classification map D3 is completed.

In addition, the classification map D3 is created for each golfer's attribute (male professional golfer, male amateur, female professional golfer, female amateur) and also for each type of golf club (driver, And a classification map D3 corresponding to the kind of the golf club.

Next, the display operation of the characteristics of the swing by the golf club selection device 10 and the operation of creating the display chart will be described.

33 is a flow chart for explaining the display operation of the feature of the swing by the golf club selection device 10 and the operation of creating the display chart.

Since steps S200 to S206 are similar to steps S100 to S106 in Fig. 32, description thereof will be omitted.

In step S208, the image forming unit 80 reads out the data of the classification map D3 read from the storage unit 64 and the data of the measurement point supplied from the analysis unit 56 (left and right approach angle? Image data for display display) is formed on the basis of the image data (image data) and image data for the printer output (step S208).

The image output unit 82 displays a two-dimensional coordinate axis consisting of the X-axis and the Y-axis on the display screen of the display 46 based on the image data for display display supplied from the image forming unit 80 Step S210: coordinate axis display step).

Next, the image output section 82 displays on the display screen of the display 46 a first boundary line LA, a second boundary line (hereinafter, referred to as " LB) (step S212: border line display step).

The image output section 82 displays the slice area A1 and the fade area A2 on the display screen of the display 46 based on the image data for display display supplied from the image forming section 80. [ The straight area A3, the draw area A4, and the hook area A5 (step S214: various area display steps). In other words, the image output unit 82 displays a plurality of areas A1 to A5 whose boundaries are divided according to the tendency of the ball to fly.

Next, the image output section 82 displays the measurement point on the display screen of the display 46 based on the image data for display display supplied from the image forming section 80 (step S216: measurement point display step ).

As a result, the characteristic of the swing is displayed on the display screen of the display 46 as shown in Fig.

Next, the image output section 82 supplies the printer 48 with the image data for printer output supplied from the image forming section 80, thereby printing the characteristic of the swing of the golf club on the recording medium, (Step S218).

As a result, as shown in Fig. 23, a display chart showing characteristics of the swing is output.

In addition, in the display of each area or the output of the display chart, a plurality of classification maps D3 are prepared in advance according to the attributes of the golfer, a classification map D3 corresponding to the attributes of the customer is selected, The characteristic of the swing that reflects the attributes of the customer can be presented, which is advantageous in securing the satisfaction of the customer.

Next, the operation of selecting a golf club will be described.

Fig. 34 is a flowchart for explaining the selection operation of the golf club selection device 10. Fig.

Steps S300 to S306 are the same as steps S100 to S106 in Fig. 32, and thus description thereof will be omitted.

In step S308, the classifying unit 58 classifies the swing of the golf club based on the left-right entry angle [theta] and the face angle [phi] at the time of hitting, ) (Step S308: classification step).

Next, the selection unit 60 selects the golf club according to the specified type using the selection information D4 (step S310: selection step).

Next, the output unit 62 reads out the golf club information D5 corresponding to the selected golf club from the storage unit 64 (step S312: output step).

Thus, a golf club suitable for the type of swing of the golfer is selected.

Therefore, the right and left approach angles [theta] and [phi] are calculated based on the right and left entry angles [theta] and hit angle [phi] of the golf club head 16 immediately before striking the golf ball 2, Since the type of the golf swing is classified in consideration of the shift amount? S estimated from the face angle? At the time of impact, the golf swing It becomes advantageous to classify the type more precisely.

Then, since the golf club is selected based on the classification result, it is advantageous in selecting an optimum golf club for the golfer.

According to the swing display method of the golf club of this embodiment, the following operational effects are obtained.

A two-dimensional coordinate axis indicating a right and left entry angle? And a face angle? On impact and a shift amount (?) Estimated from a left and right entry angle? And a batting face angle? A plurality of areas divided in accordance with the tendency of the ball of the golf ball 2 in the flying direction and a measuring point for measuring the behavior of the golf club head 16 when the golfer actually swings are displayed .

Therefore, it is advantageous in simply and easily providing the characteristic of the swing which influences the direction in which the ball, such as a slice or a hook, is blown based on which of the plurality of areas the measurement point is located.

Particularly, in this embodiment, since the slice area A1, the fade area A2, the straight area A3, the draw area A4, and the hook area A5 are displayed as a plurality of areas, It is more advantageous to provide a simple and easy-to-understand characteristic of the swing which influences the direction in which the ball, such as a slice or a hook, is blown.

It is also possible to determine how to correct each of the left and right entry angles? And the face angle? At impact by grasping the deviation of the measurement points with respect to the fade area A2 and the draw area A4 as the ideal swing It is advantageous in understanding the improvement of the swing.

Particularly, since the performance of the practice in the golf driving range can be easily provided to the golfer, it is advantageous in practicing the golfer effectively.

In addition, when measurements are made using a plurality of kinds of golf clubs in a golf shop or the like, the characteristics of the respective golf clubs can be specifically compared. Therefore, the golfer can accurately evaluate the golf club when he purchases the golf club, which is advantageous in promoting sales.

Alternatively, when the measurement is performed using the conventional product or the new product at the time of promoting the new product of the golf club, the improvement point of the new product can be shown in comparison with the conventional product, which is advantageous for enhancing the effect of the publicity.

In this embodiment, a portion corresponding to a predetermined shift amount? S or less among the draw area A4, the fade area A2, and the straight area A3 is displayed as an area in a direction in which a good ball flows , It is advantageous in accurately providing the characteristics of the swing.

Further, in this embodiment, a portion corresponding to a predetermined side spin amount Ss or less among the draw area A4, the fade area A2, and the straight area A3 is displayed as an area in a direction in which a good ball flows , It is advantageous in accurately providing the characteristics of the swing.

In the present embodiment, since the first regression equation and the second regression equation are used in the specification of the left-right launch angle alpha and the side spin amount Ss in the estimation step, the left-right launch angle alpha and the side- It is advantageous to simply perform the process required for the specification of the signal Ss.

In the present embodiment, simulation of the movement trajectory of the golf ball 2 is performed in consideration of the backspin amount of the golf ball 2, so that the degree of simulation of the movement trajectory is enhanced and the swing characteristic is accurately provided .

Further, in the present embodiment, in the simulation of the movement trajectory of the golf ball 2, since a predetermined fixed value corresponding to the golfer's attribute is used as the ball speed and the vertical stroke angle, the ball speed and the vertical angle of attack are measured It is advantageous to simply perform the simulation.

Further, in this embodiment, since the ball speed and the up-and-down striking angle are measured at the time of striking by the golfer and the measured ball stall speed and the up-down striking angle are used in the simulation of the moving path of the golf ball 2, Which is advantageous in accurately providing the characteristics of the swing.

Further, according to the display chart of the swing of the golf club of this embodiment, the following operational effects are obtained.

Since the display chart has the two-dimensional coordinate axes indicating the left and right approach angles? And the hit face angles? And the area indicating the ball flying direction of the golf ball 2, The relationship between the face angle at impact and the plurality of areas can be easily understood, that is, it is advantageous in simply understanding the characteristics of the swing.

Particularly, in this embodiment, since the plurality of areas include the slice area A1, the fade area A2, the straight area A3, the draw area A4, and the hook area A5, ?) and the face angle? at impact and the relationship between the respective areas can be more easily understood, that is, the swing characteristic is more easily understood.

In addition, since it can be carried or stored as a medium, it is more advantageous in increasing the value of the service provided to the golfer.

Further, by measuring the behavior of the golf club head 16 when the golfer actually swings and displaying the measurement point on the display chart, it is possible to easily understand the characteristics of the swing based on the area in which the measurement point is displayed .

In addition, a display chart having a two-dimensional coordinate axis and an area may be prepared in advance, and the measurement point may be printed by the printer 48 later.

In this case, it is advantageous in reducing the printing time.

In this embodiment, the area corresponding to the ball flying direction of the golf ball 2 is divided into the slice area A1, the fade area A2, the straight area A3, the draw area A4, (A5). ≪ / RTI >

However, if it is supposed that it should be classified as any one of, for example, a straight fly, a rightward bow, and a leftward bow, three slice area A1, straight area A3 and hook area A5 .

In addition, if it is assumed that it is difficult to think that the initial flight is straight, and it should be classified into one of the rightward bending and the leftward bending, there may be two areas classified as the slice area A1 and the hook area A5 Do.

That is, each of the areas can be set appropriately (appropriately) by the way of thinking of a person skilled in the art.

Also, the range of each area can be set to an enemy by a thinking method of a person skilled in the art, for example, by increasing the tolerance of warping and increasing the range of the straight area A3.

2: Golf ball
4: Golf club
10: Golf club selection device
16: Golf club head
1602: face face
LA: 1st boundary line
LB: second boundary
L0: Baseline
L1: 1st straight line
L2: second straight line
θ: left and right approach angle (θ)
φ: Face angle (φ) at impact
α: left and right turn angle (α)
? S: Shift amount (? S)
A1: Slice area
A2: Fade area
A3: Straight Area
A4: Draw area
A5: Hook area

Claims (10)

A method of displaying a swing of a golf club that displays a characteristic of a swing measured on the basis of a behavior of a golf club head immediately before a golf club head of the swinged golf club hit by the golfer strikes the golf ball on the display device In this case,
A reference line for projecting a target line connecting the center of the golf ball and a target on a plane parallel to the horizontal plane and a tangent line for a movement locus of the golf club head immediately before striking the golf ball on the plane The angle formed by one straight line is called the right and left entry angle,
Wherein the positive side of the left and right entering angles is a positive angle on the opposite side of the golfer with respect to the reference line as a center,
The angle formed by the reference line and a second straight line projecting on the plane perpendicular to the center point of the face surface of the golf club head immediately before striking the golf ball is referred to as a striking face angle,
Wherein the positive tone of the face angle at the time of hitting is a positive angle on the opposite side of the golfer with respect to the reference line as a center,
An angle formed by a line projected on the plane of the golf ball immediately after being hit by the golf club head of the golf club swung by the golfer and the reference line is referred to as a left and right angle of attack,
Wherein the positive and negative striking angles of the right and left striking angles are set such that the opposite side of the golfer is a positive angle around the reference line,
The amount of spin around the vertical line passing through the center of the golf ball immediately after being hit by the golf club head of the golf club swung by the golfer is referred to as a side spin amount,
Wherein the side spin amount is positive in a clockwise direction as viewed from a plane, negative in a counterclockwise direction,
An estimating step of estimating the left-right launch angle and the side-spin amount from the measured values of the left-right entering angle and the batting-
A movement trajectory of the golf ball is simulated based on the estimated left and right throw angle and the side spin amount, the ball initial velocity of the golf ball, and the top and bottom angle of the golf ball to calculate a shift amount that is a distance from the reference line to the landing point A simulation step,
Wherein the step of estimating and the step of simulating are repeated to accumulate the data consisting of the left and right approach angles, the impact timing angle and the shift amount, and based on the accumulated data, an X axis representing the left and right approach angles, And a y-axis orthogonal to the yaw axis and indicating the angle at the time of hitting, wherein an intersection point of the X-axis and the Y-axis is set on a two-dimensional coordinate of zero degrees of the left- A classification map creating step of creating a classification map that defines a plurality of areas divided by a boundary in accordance with a face angle and a tendency of a direction in which the ball is flying specified based on the shift amount;
A coordinate axis display step of displaying the two-dimensional coordinate axes on a display screen of the display device;
An area display step of displaying a plurality of areas on the display screen based on the classification map;
And a measurement point display step of displaying on the display screen a coordinate point indicating a value of the left and right entry angles measured when the golfer hit the golf ball using the golf club and a value of the angle of the hit face angle as measurement points,
Wherein the swing of the swing of the golf club is expressed by the following equation. The method according to claim 1,
Wherein the estimating step includes a first regression equation which is formed based on actual values of the left and right entry angles, the batting time of the face angle and the left and right throwing angles, and specifies the left and right throwing angles from the left and right entry angles and the batting phase angle, And a second regression equation which is formed based on actual values of the left and right entry angles, the batting face angle and the side spin amount, and specifies the side spin amount from the left and right entry angles and the batting phase angle,
Wherein the swing of the swing of the golf club is expressed by the following equation. 3. The method according to claim 1 or 2,
Wherein simulation of the movement trajectory of the golf ball by the simulation step is performed in consideration of the back spin amount of the golf ball,
Wherein the swing of the swing of the golf club is expressed by the following equation. 3. The method according to claim 1 or 2,
Wherein simulation of the movement trajectory of the golf ball by the simulation step includes the steps of using a predetermined fixed value corresponding to the attribute of the golfer as the ball first speed and the vertical stroke angle,
Wherein the swing of the swing of the golf club is expressed by the following equation. 3. The method according to claim 1 or 2,
Further comprising a measuring step of measuring the ball first speed and the up-and-down striking angle at the time of striking by the golfer,
Wherein, in the simulation step, the ball velocity and the measured value measured in the measuring step are used as the vertical angle of attack,
Wherein the swing of the swing of the golf club is expressed by the following equation. 6. The method according to any one of claims 1 to 5,
Before the various area displaying steps are performed,
On the display screen,
A first boundary line intersecting the X axis and the Y axis on the two-dimensional coordinate axes, the first boundary line being formed by a straight line corresponding to the shift amount of 0 extending at a positive slope,
A second boundary line that is a straight line that intersects the first boundary line on the two-dimensional coordinate axis and extends in a positive slope larger than the first boundary line,
A boundary line displaying step is performed,
The display of a plurality of areas divided in accordance with the tendency of the ball to fly by the various area displaying steps,
An area positioned on the positive side of the X axis and the Y axis among the two areas sandwiched by the first boundary line and the second boundary line is displayed as a draw area,
An area located on the negative direction side of the X axis and the Y axis among the two areas sandwiched by the first boundary line and the second boundary line is displayed as a fade area,
A region located on the positive direction side of the draw area and the fade area on the Y axis is displayed as a slice area,
An area located on the negative direction side of the draw area and the fade area on the Y axis is displayed as a hook area,
And the second boundary line is displayed as a straight area,
Wherein the swing of the swing of the golf club is expressed by the following equation. The method according to claim 6,
In the various area display step, a portion corresponding to a predetermined shift amount or less among the draw area, the fade area, and the straight area is displayed as an area in a direction in which a good ball flows,
Wherein the swing of the swing of the golf club is expressed by the following equation. 8. The method according to claim 6 or 7,
In the various area display step, a portion corresponding to a predetermined side spin amount or less among the draw area, the fade area, and the straight area is displayed as an area in a direction in which a good ball flows,
Wherein the swing of the swing of the golf club is expressed by the following equation. A diagram of a swing of a golf club indicating the characteristics of a swing measured based on the behavior of the golf club head immediately before the golf club head of the golf club swung by the golfer strikes the golf ball,
A reference line for projecting a target line connecting the center of the golf ball and a target on a plane parallel to the horizontal plane and a tangent line for a movement locus of the golf club head immediately before striking the golf ball on the plane The angle formed by one straight line is called the right and left entry angle,
Wherein the right and left entering angles are set such that the opposite side of the golfer is a positive angle with respect to the reference line as a center,
The angle formed by the reference line and a second straight line projecting on the plane perpendicular to the center point of the face surface of the golf club head immediately before striking the golf ball is referred to as a striking face angle,
When the opposite side of the golfer is a positive angle with respect to the base line and the golfer side is a negative angle,
And an X axis representing the right and left approach angles and a Y axis orthogonal to the X axis and representing the batting phase angle, wherein an intersection of the X axis and the Y axis is defined as zero degrees Dimensional coordinates,
Dimensional coordinate system having a plurality of areas divided in accordance with a tendency in a direction in which the balls fly,
A first boundary line intersecting the X axis and the Y axis on the two-dimensional coordinate axes, the first boundary line being formed by a straight line corresponding to the shift amount extending to a positive slope,
A second boundary line intersecting the first boundary line in the two-dimensional coordinate axis, the second boundary line being formed by a straight line extending in a positive slope larger than the first boundary line and corresponding to zero side spin amount,
The plurality of areas, which are bounded by the tendency of the ball to fly,
A draw area displayed in a region located on the positive side of the X axis and the Y axis among the two areas sandwiched by the first boundary line and the second boundary line,
A fade area displayed in a region located on the negative direction side of the X axis and the Y axis among the two areas sandwiched by the first boundary line and the second boundary line;
A slice area which is displayed in a region located on the draw area and the positive direction side of the Y-axis with respect to the fade area,
A hook area displayed in a region located on a Y-axis negative direction side of the draw area and the fade area;
And a straight area indicated on the second boundary line,
A representation of the swing of the golf club. 10. The method of claim 9,
Further comprising a measurement point displayed in any one of said plurality of areas,
Wherein the measurement point is a coordinate point indicating a value of the left and right entry angles measured when the golfer hit the golf ball using the golf club and a value of the angle of the hit face,
A representation of the swing of the golf club.

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