JP2012055522A - Golf club head behavior-measuring device, golf club head behavior-measuring method, and golf club-selecting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head behavior-measuring device and a golf club head behavior-measuring method, which facilitate measuring the speed and vertical and horizontal angles of a golf club head immediately before impacting, and to provide a golf club-selecting system which selects an optimal golf club according to the golf club head behavior.SOLUTION: The golf club head behavior-measuring device has: three coil sensors disposed at apexes of a triangle on the same surface; a signal processing unit obtaining induced electromotive forces generated in the coil sensors by a magnet provided in the golf club head, obtaining the signal waveforms of the induced electromotive forces, and specifying times of generation of the induced electromotive forces; and an arithmetic processing unit forming two pairs of two coil sensors sharing one coil sensor from the three coil sensors, finding a difference or ratio between the times of generation of the induced electromotive forces of the coil sensors of every pair, and finding a first movement direction of the golf club head based on a difference or ratio between the differences of generation times of the pairs.

Description

  The present invention relates to a golf club head behavior measuring device, a golf club head behavior measuring method, and a golf club selection system using the golf club head behavior measuring device when a golfer swings a golf club. Golf club head behavior measuring device, golf club head behavior measuring method and golf club head behavior measuring device for measuring head speed immediately before impact of golf club head, golf club head vertical and horizontal approach angles The present invention relates to a golf club selection system that selects an optimal golf club corresponding to the selected golf club.

Conventionally, in a golf club swing by a golfer, there is a measuring device that measures the head speed, vertical angle, left and right angle, etc. of a golf club head immediately before impact.
Among these, various head speed measuring devices have been proposed (see Patent Document 1 and Patent Document 2).

Patent Document 1 includes a plurality of sensor coils arranged at predetermined intervals, and a swing is performed based on induced electromotive forces generated in the plurality of sensor coils by a magnet mounted at a predetermined position of the club head. A golf club head speed measuring apparatus for measuring the club head speed is disclosed.
In the golf club head speed measuring device disclosed in Patent Document 1, the first and second sensor coil groups including at least two sensor coils arranged at predetermined intervals in the vertical direction are set at predetermined intervals in the horizontal direction. And a club head for the first and second sensor coil groups based on the detection result of the level detection means and the level detection means for detecting the respective levels of the induced electromotive force generated in the sensor coil. A passage position detection means for detecting the passage position of the head, an angle detection means for detecting a rough angle of the passage trajectory of the club head with respect to the horizontal plane based on a detection result of the passage position detection means, and a detection result of the angle detection means. Display means for displaying.

  In Patent Document 2, first and second sensor coils are disposed along a side wall portion extending substantially parallel to a swing track, and the passage is detected when a club head having a permanent magnet attached to the tip thereof passes therethrough. A calculation unit that calculates swing time, head speed, and total flight distance based on signals detected by the first and second sensor coils, a display unit that displays the above items, swing time, head speed, and total flight distance A golf swing measurement device is disclosed that includes a memory unit that stores measurement data for a plurality of hits and a transmission unit that transmits measurement data stored in the memory unit to a personal computer. In the golf swing measuring apparatus of Patent Document 2, the calculation unit obtains a head trajectory based on signals detected by the first and second sensor coils, and classifies the head trajectory into outside-in, straight, or inside-out. It is disclosed to display on a display unit.

JP-A-5-232130 JP 2008-284133 A

The above-described golf club head speed measuring device of Patent Literature 1 and the golf swing measuring device of Patent Literature 2 both use a golf club head with a magnet attached, and simply measure head speed and the like. Is.
The angle detection means of the golf club head speed measuring device of Patent Document 1 displays a downward angle display, a horizontal angle display, and an upward angle display, and does not detect a specific angle.
Also, in the golf swing measuring device of Patent Document 2, although it is described that the head trajectory is displayed on the display unit by dividing into outside-in, straight or inside-out, specifically, how to outside There is no mention of whether it is classified as in, straight or inside out. Although Patent Document 2 discloses obtaining a golf club head trajectory, it does not detect a specific angle.
As described above, both the golf club head speed measuring device of Patent Document 1 and the golf swing measuring device of Patent Document 2 cannot obtain the vertical and horizontal angles of the golf club head immediately before impact. There is.

  Also, today, golfers want to select a golf club suitable for their golf swing, in addition to improving their golf swing, in order to enjoy golf more. Under such circumstances, in the head speed measuring devices described in Patent Documents 1 and 2 above, although the incident angle of the golf club head with respect to the golf ball can be roughly known, the higher trajectory and lower trajectory of the golf ball. In addition to the ballistic trajectory, there is a problem in that it is not possible to obtain information for selecting a golf club suitable for one's own golf swing that affects the ball muscles such as hooks and slices of the golf ball.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems based on the prior art and to easily measure the head speed immediately before the impact of the golf club head, the vertical and horizontal angles of the golf club head, and the golf club head behavior measuring method. The object is to provide a club head behavior measuring device.
Another object of the present invention is to provide a golf club selection system that selects an optimal golf club according to the behavior of the golf club head.

  In order to achieve the above object, a first aspect of the present invention is a golf club head behavior measurement for measuring a behavior of the golf club head when a golfer swings a golf club having a golf club head provided with a magnet. The apparatus is a device for acquiring, in the same plane, three coil sensors arranged at the positions of the respective vertices of a triangle, and induced electromotive voltages generated in the respective coil sensors by the magnets, and obtaining signals of the induced electromotive voltages. While obtaining a waveform, making two sets of two coil sensors by making one coil sensor in common among the three coil sensors, the signal processing unit for specifying the generation time of each induced electromotive voltage, A difference in the generation time of the induced electromotive force of each coil sensor is obtained for each group, and the coil sensor is arranged based on a difference or ratio of the generation time differences in each group. Is to provide a golf club head behavior measuring device, characterized in that it comprises an arithmetic processing unit for obtaining a first moving direction of the golf club head in a plane parallel to a plane is.

  The signal processing unit obtains a slope of each signal waveform from the signal waveform of each coil sensor, and the arithmetic processing unit calculates a difference or ratio of the slope of the signal waveform of each coil sensor. The second movement direction of the golf club head in a plane orthogonal to the plane on which the coil sensor is disposed is preferably obtained based on the above.

  According to a second aspect of the present invention, there is provided a golf club head behavior measuring device for measuring the behavior of the golf club head when a golfer swings a golf club having a golf club head provided with a magnet. In addition, a coil sensor that is arranged at the position of each vertex of the triangle and two of the three are on a horizontal line, and an induced electromotive voltage generated in each coil sensor by the magnet is obtained, and the induced electromotive voltage is obtained. And a signal processing unit for determining an inclination of each signal waveform from the signal waveform of each coil sensor, and on the horizontal line. The difference between the generation times of the induced electromotive voltages of the two coil sensors is obtained, and the difference between the generation times of the induced electromotive voltages of the two coil sensors is determined. The moving speed of the club head is obtained, and among the three coil sensors, one coil sensor is used in common, and two sets of two coil sensors are formed, and the induced electromotive force of each coil sensor is generated for each set. Obtaining a difference in timing, and obtaining a first moving direction of the golf club head in a plane parallel to a plane on which the coil sensor is arranged based on the difference or ratio of the difference in the occurrence times of each set, An arithmetic processing unit for obtaining a second moving direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on a difference or ratio of inclinations of the signal waveforms of the coil sensors. A golf club head behavior measuring device is provided.

  In the signal processing unit, a high level threshold and a low level threshold are set in advance for the induced electromotive voltage, and the signal processing unit includes the high level threshold and the low level threshold. The calculation processing unit uses the generation time at the high level threshold and the generation time at the low level threshold to generate the induced electromotive voltage of each coil sensor for each set. It is preferable to determine the difference in the occurrence time of

In the signal processing unit, a high level threshold and a low level threshold are set in advance for the induced electromotive voltage, and the signal processing unit includes the high level threshold and the low level threshold. The calculation processing unit obtains the slope of the signal waveform of each coil sensor using the generation time at the high level threshold and the generation time at the low level threshold. It is preferable.
Moreover, it is preferable that two of the three coil sensors are spaced apart so as to be parallel to the horizontal plane.

  A third aspect of the present invention is a golf club in which a coil sensor is disposed at each vertex of a triangle in the same plane, and a magnet is provided in a region facing the surface on which each coil sensor is disposed. When the golfer swings the golf club so that the head passes, the step of specifying the generation time of the induced electromotive force generated in each coil sensor by the recording magnet provided in the golf club head; Of the three coil sensors arranged at the position of the apex, one coil sensor is used in common, and two sets of two coil sensors are formed. For each set, the generation time of the induced electromotive voltage of each coil sensor is determined. A step of obtaining a difference, and a step of obtaining a first moving direction of the golf club head based on a difference or ratio of the difference in the generation time of each set. It is intended to provide a golf club head behavior measurement how.

  Further, the step of calculating the slope of each signal waveform from the signal waveform of each coil sensor, the step of obtaining the difference or ratio of the slope of the signal waveform of each coil sensor, Preferably, the method includes a step of obtaining a second movement direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on the ratio.

  Further, the method further includes a step of setting a high level threshold and a low level threshold in advance with respect to the induced electromotive voltage, and specifying an occurrence time at the high level threshold and the low level threshold. The step of determining the difference between the generation times of the induced electromotive voltages includes the generation time at the high level threshold and the generation time at the low level threshold, and the induction voltage of each coil sensor for each set. It is preferable to determine the difference in generation time.

  Further, the method further includes a step of setting a high level threshold and a low level threshold in advance with respect to the induced electromotive voltage, and specifying an occurrence time at the high level threshold and the low level threshold. The step of determining the difference or ratio of the slopes of the signal waveforms of the coil sensors uses the generation time at the high level threshold and the generation time at the low level threshold to generate the signal waveform of each coil sensor. It is preferable to obtain the slope of

  According to a fourth aspect of the present invention, a coil sensor is disposed at each vertex of a triangle having two vertices on a horizontal line in the same plane, and is a region facing the surface on which each coil sensor is disposed. When the golfer swings the golf club so that the golf club head provided with the magnet passes, the generation time of the induced electromotive force generated in each coil sensor by the recording magnet provided in the golf club head is determined. And determining the difference between the generation times of the induced electromotive voltages of the two coil sensors arranged on the horizontal line and determining the difference between the generation times of the induced electromotive voltages of the two coil sensors. The step of obtaining the moving speed of the club head and the two coils that share one coil sensor among the three coil sensors arranged at the apex of the triangle. Two sets of sensors are made, a difference in the generation time of the induced electromotive force of each coil sensor is determined for each group, and the golf club head Calculating a slope of each signal waveform from the signal waveform of each coil sensor, obtaining a difference or ratio of the slope of the signal waveform of each coil sensor, A method for measuring a behavior of a golf club head, comprising: obtaining a second moving direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on a difference or ratio of inclination. Is to provide.

  According to a fifth aspect of the present invention, there is provided a selection system in which a golfer selects a golf club by swinging a golf club having a golf club head provided with a magnet, and the position of each vertex of the triangle is within the same plane. And the induced electromotive force generated in each coil sensor by the magnet, respectively, to obtain a signal waveform of the induced electromotive voltage, and specify the generation time of each induced electromotive voltage Of the three coil sensors, the signal processing unit and one of the three coil sensors are used in common, and two sets of two coil sensors are formed, and the difference in generation time of the induced electromotive force of each coil sensor for each set And determining the first movement of the golf club head in a plane parallel to the plane on which the coil sensor is arranged based on the difference or ratio of the generation time differences of the respective sets. An arithmetic processing unit for obtaining a direction, and the signal processing unit obtains an inclination of each signal waveform from the signal waveform of each coil sensor, and the arithmetic processing unit A golf club head behavior measuring device for obtaining a second movement direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on a difference or ratio of inclinations of the signal waveforms of the coil sensor; A golf ball behavior measuring device that measures the behavior of the hit golf ball together with a golf club head behavior measuring device, information on the behavior of the golf club head measured by the golf club head behavior measuring device, and the golf ball behavior measurement A display device for displaying information on the behavior of the golf ball after hitting measured by the device, and the golf club head A processing device for classifying a golf swing into a predetermined type using the information on the first movement direction and the information on the second movement direction measured by the behavior measurement device, and golf suitable for the classification And a database storing a plurality of golf club data together with club head characteristic data, and the processing device selects golf club data suitable for the classification from the database according to the classified result. A golf club selection system characterized by the above is provided.

  A sixth aspect of the present invention is a selection system in which a golfer selects a golf club by swinging a golf club having a golf club head provided with a magnet, and the position of each vertex of the triangle is within the same plane. And two of the three are obtained by obtaining a coil sensor on the horizontal line and an induced electromotive voltage generated in each coil sensor by the magnet, and obtaining a signal waveform of the induced electromotive voltage. The generation time of the induced electromotive voltage is specified, the signal processing unit for obtaining the slope of each signal waveform from the signal waveform of each coil sensor, and the induction of the two coil sensors arranged on the horizontal line Obtaining a difference in the generation time of the electromotive voltage, obtaining a moving speed of the golf club head based on a difference in the generation time of the induced electromotive force of the two coil sensors; Of the two coil sensors, one coil sensor is used in common, and two sets of two coil sensors are made. For each set, the difference in generation time of the induced electromotive voltage of each coil sensor is obtained. A first moving direction of the golf club head in a plane parallel to a plane on which the coil sensor is arranged is obtained based on a difference or ratio of occurrence time differences, and an inclination of the signal waveform of each coil sensor is obtained. A golf club head behavior measuring device having an arithmetic processing unit for obtaining a second moving direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on the difference or ratio of In addition to a club head behavior measuring device, a golf ball behavior measuring device for measuring the behavior of the hit golf ball, and the golf club head A golf club head behavior information measured by a behavior measuring device, a golf ball head behavior information measuring device that displays a golf ball behavior information after hitting, and a golf club head behavior measuring device. A processing device for classifying a golf swing into a predetermined type using the information on the first movement direction and the information on the second movement direction, and characteristic data of the golf club head suitable for the classification And a database in which a plurality of golf club data is stored, and the processor selects golf club data suitable for the classification from the database according to the classified result. It provides a club selection system.

  And a projector for displaying information on the behavior of the golf club head measured by the golf club head behavior measuring device and information on the behavior of the golf ball after hitting measured by the golf ball behavior measuring device on a screen. The screen is preferably provided so as to face the hitting direction.

  In addition, the processing device uses the second movement direction value and the first movement obtained in a two-dimensional chart having the second movement direction value and the first movement direction value as coordinate axes. It is preferable to plot the value of the direction and display it on the display device.

  The golf club data stored in the database is composed of at least two types of golf club data, and the golf club represented by the at least two types of golf club data is the center axis of the golf club shaft or the center thereof. It is preferable that at least one of the center-of-gravity distance, which is the distance of the shortest straight line connecting the extension line of the shaft and the center of gravity of the golf club, and the center-of-gravity angle representing the direction of the shortest straight line differ.

According to the golf club head behavior measuring apparatus of the present invention, the movement direction of the golf club head in a plane parallel to the plane on which the coil sensor is arranged and the plane on which the coil sensor is arranged are orthogonal with a simple configuration. The moving direction of the golf club head in the plane can be measured. In addition, the head speed can also be obtained by obtaining the generation time of the induced electromotive voltage in each coil sensor.
In addition, according to the golf club head behavior measuring apparatus of the present invention, the movement direction of the golf club head in a plane parallel to the surface on which the coil sensor is disposed, and the surface on which the coil sensor is disposed, in a simple manner. The moving direction of the golf club head in the orthogonal plane can be measured. In addition, the head speed can also be obtained by obtaining the generation time of the induced electromotive voltage in each coil sensor.
Furthermore, according to the golf club selection system of the present invention, an appropriate golf club can be selected based on the behavior of the golf club head and the behavior of the golf ball with a simple configuration.

It is a mimetic diagram showing a golf club selection system which has a golf club head behavior measuring device concerning an embodiment of the present invention. 1 is a schematic block diagram showing a golf club selection system having a golf club head behavior measuring device according to an embodiment of the present invention. (A) is a schematic diagram which shows an example of the arrangement position of the magnet provided in a wood type golf club head, (b) is the schematic which shows an example of the arrangement position of the magnet provided in an iron type golf club head. FIG. (A) is a block diagram which shows the structure of the golf club head behavior measuring apparatus of embodiment of this invention, (b) is a typical perspective view which shows the external appearance of the golf club head behavior measuring apparatus of this embodiment. is there. (A) is a graph which shows an example of the signal waveform obtained with the coil sensor of the golf club head behavior measuring apparatus of this embodiment, (b) is a graph which shows the other example of the signal waveform obtained with a coil sensor (C) is a graph which shows the other example of the signal waveform obtained with a coil sensor. It is a mimetic diagram showing arrangement of a coil sensor of a golf club head behavior measuring device of this embodiment. It is a mimetic diagram showing an example of the signal processing method in the golf club head behavior measuring device of this embodiment. It is a graph which shows the relationship between a reference | standard head speed and the time difference of the generation time of the induced electromotive voltage of two coil sensors of a base. (A) is a graph which shows the relationship between the reference | standard up-down direction angle of a golf club head, and the difference of the generation | occurrence | production timing of the induced electromotive force of two sets of coil sensors, (b) is the reference up-down of a golf club head. It is a graph which shows the relationship between the angle of a direction, and the ratio of the generation time of the induced electromotive force of two sets of coil sensors. It is a mimetic diagram showing an example of the signal processing method in the golf club head behavior measuring device of this embodiment. (A) is a graph which shows an example of the relationship between the angle of the reference | standard left-right direction of a golf club head, and the ratio (signal strength ratio) of the induced electromotive force of two coil sensors of a base, (b) is golf It is a graph which shows the other example of the relationship between the angle of the reference | standard left-right direction of a club head, and the ratio (signal strength ratio) of the induced electromotive force of two coil sensors of a base. It is a mimetic diagram showing the chart used for the selection system of the golf club which has the golf club head behavior measuring device concerning the embodiment of the present invention. (A) is a schematic diagram for demonstrating the approach angle (upper and lower) of a golf club head, (b) is a schematic diagram for demonstrating the approach angle (left and right) of a golf club head. (A) is a schematic diagram which shows the movement locus | trajectory of the golf club head in the surface parallel to the plane in which the coil sensor was provided, (b) is the golf club head in a surface perpendicular | vertical to the plane in which the coil sensor was provided. FIG. 14C is a graph showing a signal waveform of each coil sensor generated by the movement trajectory of the golf club head shown in FIGS. 14A and 14B. (A) is a schematic diagram which shows the movement locus | trajectory of the golf club head in the surface parallel to the plane in which the coil sensor was provided, (b) is the golf club head in a surface perpendicular | vertical to the plane in which the coil sensor was provided. FIG. 15C is a graph showing a signal waveform of each coil sensor generated by the movement trajectory of the golf club head shown in FIGS. 15A and 15B. (A) is a schematic diagram which shows the movement locus | trajectory of the golf club head in the surface parallel to the plane in which the coil sensor was provided, (b) is the golf club head in a surface perpendicular | vertical to the plane in which the coil sensor was provided. FIG. 16C is a graph showing signal waveforms of the coil sensors generated by the golf club head movement locus shown in FIGS. 16A and 16B. (A) is a schematic diagram which shows the movement locus | trajectory of the golf club head in the surface parallel to the plane in which the coil sensor was provided, (b) is the golf club head in a surface perpendicular | vertical to the plane in which the coil sensor was provided. FIG. 17C is a graph showing signal waveforms of the coil sensors generated by the golf club head movement locus shown in FIGS. 17A and 17B. (A) is a schematic diagram which shows the movement locus | trajectory of the golf club head in the surface parallel to the plane in which the coil sensor was provided, (b) is the golf club head in a surface perpendicular | vertical to the plane in which the coil sensor was provided. FIG. 18C is a graph showing the signal waveform of each coil sensor generated by the movement trajectory of the golf club head shown in FIGS. 18A and 18B. (A) is a schematic diagram which shows the movement locus | trajectory of the golf club head in the surface parallel to the plane in which the coil sensor was provided, (b) is the golf club head in a surface perpendicular | vertical to the plane in which the coil sensor was provided. FIG. 19C is a graph showing a signal waveform of each coil sensor generated by the movement locus of the golf club head shown in FIGS. 19A and 19B. It is a mimetic diagram showing a golf ball behavior measuring device used for a golf club selection system of an embodiment of the present invention. It is a mimetic diagram showing an example of an image obtained with a golf ball behavior measuring device used for a golf club selection system of an embodiment of the present invention. (A) is a schematic diagram which shows an example of the measurement result of the behavior of the golf ball obtained with the golf ball behavior measuring device of the embodiment of the present invention, and (b) is the golf ball behavior measurement of the embodiment of the present invention. It is a schematic diagram which shows an example of the measurement result of the behavior of the golf ball obtained with an apparatus. It is a schematic diagram for demonstrating the gravity center distance and gravity center angle of a golf club head. (A) And (b) is a schematic diagram for demonstrating how to obtain | require the gravity center distance of a golf club.

Hereinafter, a golf club head behavior measurement device, a golf club head behavior measurement method, and a golf club selection system according to the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 is a schematic diagram showing a golf club selection system having a golf club head behavior measuring device according to an embodiment of the present invention.
FIG. 2 is a schematic block diagram showing a golf club selection system having a golf club head behavior measuring device according to an embodiment of the present invention.

  In the golf club selection system 10 (hereinafter, referred to as the system 10) shown in FIG. 1, the golfer G holds the grip 26 of the golf club 20 and swings the golf ball b toward the striking direction (hitting direction) a. When hitting, the behavior of the golf club head 22 before hitting (before impact) and the behavior of the golf ball b after hitting (after impact) are measured.

In the system 10 of the present embodiment, as shown in FIG. 1, for example, a golf club 20 having a golf club head 22, a golf club shaft 24, and a grip 26 is used.
In the golf club 20, for example, the length of the golf club shaft 24 is 1066 to 1219 mm (about 42 to about 48 inches), the frequency is 3.3 to 5.0 Hz (200 to 300 cpm), and the mass is 280 to 320 g. Standard golf clubs with standard specifications are used.
The golf club shaft 24 is made of a fiber reinforced composite material such as CFRP.

  The system 10 of this embodiment includes a golf club head behavior measuring device 12 that measures the behavior of the golf club head 22, a golf ball behavior measuring device 14 that measures the behavior of a hit golf ball b, a processing device 16, and the like. A projector 33 and a screen 38 are provided.

  In the system 10 of the present embodiment, a screen 38 is provided facing the ball hitting direction a from the tee t on which the golf ball b is placed. A golf ball behavior measuring device 14 is arranged facing the tee t in a direction orthogonal to the hitting direction a. A golf club head measuring device 14 is provided behind the golf ball behavior measuring device 14 with respect to the hitting direction a.

  In the system 10 of this embodiment, every time the golfer G hits one golf ball b, the behavior of the golf club head 22 and the behavior of the golf ball b are measured together.

  Furthermore, in the system 10 of the present embodiment, the golf club head behavior measuring device 12 and the golf ball behavior measuring device 14 are controlled, and image data obtained by the golf ball behavior measuring device 14 is subjected to image processing, and golf A processing device 16 having a function of causing the monitor 32 and the screen 38 to display measurement data obtained by the club head behavior measuring device 12 and the golf ball behavior measuring device 14 is provided.

In the present invention, the measured parameters of the behavior of the golf club head 22 include, for example, the head speed, the vertical approach angle (first movement direction), and the horizontal approach angle (second movement direction). .
Further, the measured parameters of the behavior of the golf ball b are, for example, head speed, ball speed, launch angle, left and right launch angle, backspin, side spin, carry, left and right shift, and total distance.

  The processing device 16 is configured by a computer, and is connected to a monitor (display device) 32, a projector 33, and an operation means 34.

The monitor 32 displays various behavior parameters obtained by the golf club head behavior measuring device 12 and the golf ball behavior measuring device 14 in the form of a table or with a figure. The monitor 32 has a function of displaying a signal processed image, an image processed image, and the like. Various types of monitors that are generally used in personal computers can be used as the monitor 32.
Since the system 10 of this embodiment has two measuring devices, the golf club head behavior measuring device 12 and the golf ball behavior measuring device 14, it is preferable to provide two monitors 32 according to the number of measuring devices. . However, the number of monitors 32 may be one.

  The operation means 34 is a general input device used in a personal computer or the like, and is, for example, a mouse or a keyboard. The operation means 34 is used for drawing on an image displayed on the monitor 32 and is used for various input settings such as setting of a display screen displayed on the monitor 32.

The projector 33 displays the same display on the screen 38 as that displayed on the monitor 32. The projector 33 is not particularly limited, and a known projector can be used.
The screen 38 is provided facing the hitting direction a of the golf ball b. That is, the screen 38 is provided in front of the golf ball b. As a result, the golfer G hits the screen 38.
By providing the screen 38, the behavior of the golf club head 22, the behavior of the golf ball b, and the like can be easily perceived from the swinging position.
A net (not shown) for preventing the screen 38 from being damaged is preferably provided in front of the screen 38.

  The operating means 34 is a keyboard 34a and a mouse 34b, and has the same general functions as those provided in a personal computer, and is used for setting golf ball behavior measurement conditions and golf club head behavior measurement item conditions. It is used for various input settings such as setting, setting of a display screen displayed on the monitor 32 and the projector 33.

As illustrated in FIG. 2, the processing device 16 includes a first processing unit 160, a second processing unit 162, a control unit 164, a storage unit 170, a setting unit 172, and a database 174.
In the processing device 16, the first processing unit 160, the second processing unit 162, the storage unit 170, the setting unit 172, and the database 174 are controlled by the control unit 164.

The first processing unit 160 is connected to the golf club head behavior measuring device 12. The first processing unit 160 will be described in detail later.
The second processing unit 162 is connected to the golf ball behavior measuring device 14. The second processing unit 162 will be described in detail later.

  The storage unit 170 is connected to the first processing unit 160 and the second processing unit 162. As will be described later, various measurement values obtained by the first processing unit 160 and the second processing unit 162, and The image processed image data and the like are stored.

  The control unit 164 displays behavior parameters obtained by the golf club head behavior measuring device 12 and the golf ball behavior measuring device 14 on the monitor 32 or the projector 38, respectively.

  The setting unit 172 sets a golf ball behavior measurement condition, a golf club head behavior measurement item condition, a monitor 32, a display screen displayed on the projector 33, and the like based on an instruction input from the operation unit 34. Various input settings are made.

The database 174 is used for selecting the golf club head 22 of the golf club 20.
In the system 10 of the present embodiment, a plurality of golf clubs each having a golf club shaft mounted on a golf club head are prepared so that trial hits can be made.
In this database 174, golf club data is stored for each of a plurality of golf clubs that are actually prepared. The stored golf club data is stored together with characteristic data of the golf club head described later.
Further, for example, an identification number is assigned to each of the plurality of golf clubs for which the real thing is prepared, and the identification number and the golf club data are associated with each other.
For this reason, as described later, when the golf club head characteristic data is selected by the processing device 16, the golf club data is also selected, and the selected golf club is displayed on the monitor 32 together with the identification number. Thereby, the actual golf club selected by the processing device 16 can be prepared.

The golf club head characteristic data is classified into the A type, the B type, the C type, and the D type, which are classified as described later with respect to the measured behavior of the golf club head. The golf club heads are classified and stored, for example, by the center of gravity distance and the center of gravity angle. Other than this, inside-in-orbit, inside-out orbit, outside-in-orbit swing classification, loft angle, center of gravity distance, center of gravity retreat amount, or a vertical straight line that passes through the center of gravity and perpendicular to the horizontal plane is the rotation axis. May be classified and stored according to the magnitude of the inertia moment.
The classification method in the golf club head characteristic data is not particularly limited.

  In the system 10 of the present embodiment, when the golfer G swings the golf club 20, the behavior of the golf club head 22 is measured. Based on the behavior measurement result of the golf club head 22 in the processing device 16, from the database 174. The data of a golf club having a suitable golf club head is extracted by the control unit 164 and further displayed on the monitor 32.

Next, the golf club used in this embodiment will be described.
(A) is a schematic diagram which shows an example of the arrangement position of the magnet provided in a wood type golf club head, (b) is the schematic which shows an example of the arrangement position of the magnet provided in an iron type golf club head. FIG.

For example, as shown in FIG. 3A, in a wood type golf club 20 having a golf club shaft 24 and a golf club head 22, a magnet 25 is provided on a side portion 22 c on the toe side of the golf club head 22. It is pasted.
Further, as shown in FIG. 3B, in an iron-based golf club 20a having a golf club shaft 24 and a golf club head 23, the golf club head 23 in contact with the striking surface 23a of the golf club head 23 is used. A magnet 25 is affixed to the end surface portion 23c on the toe side.
The magnet 25 used in the present embodiment has, for example, an N pole on the front side and an S pole on the back side and a magnetism.

Next, the golf club head behavior measuring device 12 (hereinafter referred to as the behavior measuring device 12) of this embodiment will be described.
As shown in FIG. 4B, the behavior measuring device 12 shown in FIG. 4A is provided behind the golf ball behavior measuring device 14 in the hitting direction a with respect to the tee t.
The behavior measuring apparatus 12 detects the approach and separation of the magnet 25 provided on the golf club head 22 together with the first processing unit 160 of the processing apparatus 16 by the three coil sensors 40a to 40c, and each coil sensor 40a. ˜40c detection timing, the head speed of the golf club head 22 before impact, the vertical movement direction of the golf club head 22 in the plane parallel to the plane 12b on which the coil sensors 40a to 40c are arranged (first movement direction) ), That is, the approach angle in the vertical direction is measured. Furthermore, the behavior measuring apparatus 12 is configured so that the golf club head 22 moves in the left-right direction (second movement direction), that is, the approach angle in the left-right direction, in a plane orthogonal to the plane 12b on which the coil sensors 40a to 40c are arranged. Is to measure.

  The behavior measuring device 12 includes coil sensors 40a to 40c, amplifiers 42a to 42c, signal processing units 44a to 44c, and A / D converters 46a to 46c, which are housed in the housing 12a.

Each of the coil sensors 40a to 40c generates an induced electromotive voltage when the magnet 25 approaches, and obtains information on the induced electromotive voltage. A known coil sensor can be used as the coil sensors 40a to 40c.
The three coil sensors 40a to 40c are arranged in the housing 12a so as to be positioned at the vertices of the isosceles triangle so that the lower side is the base on the plane 12b through which the golf club head 22 passes. Yes. The plane 12b is provided perpendicular to the horizontal plane H. The coil sensor 40 a and the coil sensor 40 b are disposed at the apexes of the sides parallel to the horizontal plane H. That is, the coil sensor 40a and the coil sensor 40b are arranged on a line parallel to the horizontal plane H, that is, on a horizontal line.

The amplifiers 42a to 42c are connected to the coil sensors 40a to 40c, respectively.
The amplifiers 42a to 42c amplify the induced electromotive voltages generated by the coil sensors 40a to 40c to a predetermined magnification, respectively.

The signal processing units 44a to 44c take in the induced electromotive voltages amplified by predetermined times by the amplifiers 42a to 42c, for example, for a predetermined time to obtain signal waveforms, and the induced electromotive voltages of the coil sensors 40a to 40c. It specifies the time of occurrence.
The signal processing units 44a to 44c previously set a theoretical coil center (Cc), that is, a threshold value (THh) on the high level side and a threshold value (THL) on the low level side with respect to the reference value, for this signal waveform. Has been.
In the signal processing units 44a to 44c, the time at the high level side threshold (THh) and the low level side threshold (THL) is obtained, and the obtained time data of the high level side threshold value, the low level side The data of the threshold time is output to the A / D converters 46a to 46c.

  The A / D converters 46a to 46c convert the high-level threshold time data and the low-level threshold time data obtained for each signal waveform by the signal processing units 44a to 44c into digital data, This is output to the first processing unit 160.

In the behavior measuring apparatus 12, when the signal waveform 50a shown in FIG. 5A is obtained by the coil sensor 40a, the time data at the point A of the threshold (THh) on the high level side with respect to the signal waveform 50a. The time data at the point B of the threshold (THL) on the low level side is obtained.
The time α from the point A to the point B is obtained by the first processing unit 160 described later. This time α is related to the slope γ of the signal waveform 50a. When the time α is short, the slope γ is large. Further, when the slope γ is large, the height of the signal waveform 50a is high. The higher the height of the signal waveform 50a, the closer the magnet 25 approaches. In the signal waveform 50a, the time at half the time α is the time when the golf club head 22 to which the magnet 25 is attached passes through the theoretical coil center (Cc).

Further, when the signal waveform 50b shown in FIG. 5B is obtained by the coil sensor 40b, the time at the point A of the high-level threshold (THh) is also obtained for the signal waveform 50b shown in FIG. 5B. And the time data at point B of the threshold (THL) on the low level side. The time α from the point A to the point B is obtained by the first processing unit 160 described later.
Furthermore, when the signal waveform 50c shown in FIG. 5 (c) is obtained by the coil sensor 40c, the point A of the threshold (THh) on the high level side also for the signal waveform 50c shown in FIG. 5 (c). And the time data at point B of the threshold (THL) on the low level side. The time α from the point A to the point B is obtained by the first processing unit 160 described later.

In the present embodiment, the coil sensors 40a to 40c are arranged at the positions of the vertices of the isosceles triangle in the same plane 12b. However, the coil sensors 40a to 40c may be arranged at the vertices of the triangle. In particular, it is not limited to an isosceles triangle.
As shown in FIG. 6, when it is assumed that the distance L between the bases and the height is h, L is preferably 100 mm and h is preferably 70 to 75 mm. The position of the coil sensor 40c is preferably 25% to 75% of the position between the coil sensors 40a and 40b.

The first processing unit 160 (arithmetic processing unit) takes in the digital data of the high-level threshold time and the digital data of the low-level threshold time obtained for each signal waveform by the signal processing units 44a to 44c, As the behavior parameters of the golf club head 22, for example, the head speed, the vertical approach angle (hereinafter also referred to as the approach angle (up and down)), and the horizontal approach angle (hereinafter also referred to as the approach angle (left and right)) are calculated. Is.
The first processing unit 160 (arithmetic processing unit) is a part that functions by executing a program. However, in the present invention, it may be configured by hardware such as a circuit. Note that each function of the first processing unit 160 is controlled by the control unit 164.

Hereinafter, a method for calculating the difference in the generation time of the induced electromotive force, that is, the movement time of the golf club head 22 to which the magnet 25 is attached to the coil sensors 40a to 40c by the measuring device 12 and the first processing unit 160 in the present embodiment. Will be described with reference to FIG.
Swing is performed so that the golf club head 22 to which the magnet 25 is attached passes through a region facing the plane 12b of the behavior measuring device 12, and signal waveforms 52a to 52c as shown in FIG. 7 are obtained for the coil sensors 40a to 40c. A case where the above is obtained will be described as an example. In FIG. 7, the vertical axis represents voltage and the horizontal axis represents time.

  First, for each of the signal waveforms 52a to 52c, the theoretical coil center (Cc), that is, the time at the points 1A to 3A of the high level threshold (THh) set with respect to the reference value, the low level threshold Times at (THL) points 1B to 3B are obtained by the signal processing units 44a to 44c.

  Next, time data at points 1A to 3A of the high-level threshold (THh) obtained for each signal waveform by the signal processing units 44a to 44c in the A / D converters 46a to 46c, the low-level threshold The time data at (THL) points 1 </ b> B to 3 </ b> B is converted into digital data and output to the first processing unit 160.

In the first processing unit 160, when obtaining a moving time the magnet 25 is moved to the coil sensor 40c from the coil sensor 40a, and time _{T 13A} between point 1A and the point 3A, the time _{T 13B} between the point 1B and the point 3B The average time of these times T _13A and T _13B is obtained. The average time is the time _{T 13} between the center of the theoretical center of the theoretical coil sensor 40a (point 1C) and the coil sensor 40c (point 3C). The time _{T 13} can be determined by time _{T 13 = (T 13A + T} 13B) / 2.
The time T ₁₃ shows the difference between the occurrence time of the induced electromotive voltage at the coil sensor 40a and the coil sensor 40c.

When determining the travel time of the golf club head 22 the magnet 25 from the coil sensor 40c to the coil sensor 40b is attached, and time _{T 32A} between point 3A and the point 2A, and a time _{T 32B} between the point 3B and the point 2B The average time of these times T _32A and T _32B is obtained. This average time is a time T32 between the theoretical center (point 3C) of the coil sensor 40c and the theoretical center (point 2C) of the coil sensor 40b. The time _{T 32} can be determined by time _{T 32 = (T 32A + T} 32B) / 2.
The time T ₃₂ shows the difference between the occurrence time of the induced electromotive voltage at the coil sensor 40c and the coil sensor 40b.

When determining the travel time of the golf club head 22 the magnet 25 from the coil sensor 40a to the coil sensor 40b is attached, and time _{T 12A} between point 1A and the point 2A, and a time _{T 12B} between the point 1B and point 2B The average time of these times T _12A and T _12B is obtained. The average time is the time _{T 12} between the center of the theoretical center of the theoretical coil sensor 40a (point 1C) and the coil sensor 40b (point 2C). The time _{T 12} can be determined by time _{T 12 = (T 12A + T} 12B) / 2.
The time T ₁₂ shows the difference between the occurrence time of the induced electromotive voltage at the coil sensor 40a and the coil sensor 40b.

In the present embodiment, the distance L between the coil sensor 40a and the coil sensor 40b is, for example, since it is known and 100 mm, by obtaining the time _{T 12,} it is possible to determine the head speed.
Thus, by arranging the coil sensor 40a and the coil sensor 40b on a line parallel to the horizontal plane H, the head speed can be measured.

In the present embodiment, for example, as a reference value the measurement values of head speed by the mobile measuring apparatus described in JP-A-2005-253505, by calibrating the time T _12, the head speed with high precision Can be sought.
In this case, as shown in FIG. 8, after measuring the head scan Pete time T ₁₂ in the value of measured by the mobile measuring device as a reference value, a regression equation. The regression equation is, for example, is represented by a straight line R _1. In this way it is possible to calibrate the time T _12. Moreover, it is preferable that a regression equation is a linear form.
Note that the regression equation represented by the straight line R ₁ is stored in the storage unit 170 of the processing device 16, for example. When measuring the head speed, the first processing unit 160, a regression equation represented by the straight line R ₁ is called from the storage unit 170, the head speed based on this regression equation and the time T ₁₂ is obtained.

Further, based on the time T ₁₃ and the time T _32, it is possible to obtain the vertical approach angle of the golf club head 22.
In the present invention, since the three coil sensors 40a to 40c are arranged at the apexes of the triangle, the moving angle with respect to the horizontal direction of the golf club head 22 to which the magnet 25 is attached can be obtained at the timing of crossing each hypotenuse. it can.

In the present embodiment, the difference between the time T ₁₃ and the time T ₃₂ has found that corresponds to the vertical approach angle of the golf club head.
Further, in the present embodiment, it has been found that the ratio between the time T ₁₃ and the time T ₃₂ (time T ₁₃ / time T ₃₂ ) corresponds to the vertical approach angle of the golf club head.
In the present embodiment, with respect to the approach angle in the vertical direction, for example, the difference between time T ₁₃ and time T ₃₂ , and the time measured by the moving body measuring device described in JP-A-2005-253505, and the time the ratio between T ₁₃ and the time T _32, by calibrating, can be obtained with high accuracy for approach angle in the vertical direction.
Therefore, in the present embodiment, among the coil sensors 40a to 40c, for example, the coil sensor 40c is shared, the coil sensor 40a and the coil sensor 40c are combined, and the coil sensor 40b and the coil sensor 40c are combined. , the time difference in each set, i.e., time T ₁₃ that indicates the difference between the occurrence time of the induced electromotive voltage of the coil sensor in each _set, determine the time T _32, to determine the difference or ratio of these time T _13, the time T ₃₂ Thus, the approach angle in the vertical direction can be obtained.

The difference between the above-mentioned time _{T 13} and the time _{T 32} (time _T 13 _{-T 32)} is, specifically, as shown in FIG. 9 (a), the upper and lower measured by the mobile measuring apparatus as a reference value after determining the difference between the time in the value of the approach angle T ₁₃ and the time T _32, a regression equation. The regression equation is, for example, is represented by a straight line R _2. In this way, it is possible to calibrate the difference between the time T ₁₃ and the time T _32. Moreover, it is preferable that a regression equation is a linear form.
Note that the regression equation represented by the straight line R ₂ is stored in, for example, the storage unit 170 of the processing device 16. When measuring the upper and lower approach angles, the first processing unit 160 calls a regression equation represented by the straight line R ₂ from the storage unit 170, and the difference between the regression equation and time T ₁₃ and time T ₃₂ (time approach angle of up and down based on the T ₁₃ -T ₃₂₎ is required.

In addition, the ratio (time T ₁₃ / T ₃₂ ) between the time T ₁₃ and the time T ₃₂ described above is specifically measured by a moving body measuring apparatus serving as a reference value as shown in FIG. 9B. after determining the ratio between the time T ₁₃ and the time T ₃₂ in the value of the approach angle of the vertical that, a regression equation. The regression equation is, for example, is represented by a straight line R _3. In this way, it is possible to calibrate for the ratio between the time T ₁₃ and the time T _32. Moreover, it is preferable that a regression equation is a linear form.
Note that the regression equation represented by the straight line R ₃ is, for example, stored in the storage unit 170 of the processing apparatus 16. When measuring the upper and lower approach angles, the first processing unit 160 calls the regression equation represented by the straight line R ₃ from the storage unit 170, and the ratio between this regression equation and time T ₁₃ and time T ₃₂ ( Based on the time T ₁₃ / T ₃₂ ), the upper and lower approach angles are obtained.

Next, the calculation method of the relative distance with respect to the plane 12b of each coil sensor 40a-40c by the measuring device 12 and the 1st processing unit 160 in this embodiment is demonstrated based on FIG.
The behavior measuring device 12 is swung so that the golf club head 22 to which the magnet 25 is attached passes through the region facing the flat surface 12b, and the signal waveforms 54a to 54c as shown in FIG. A case where the above is obtained will be described as an example. In FIG. 10, the vertical axis represents voltage and the horizontal axis represents time.

  First, for each of the signal waveforms 54a to 54c, the theoretical coil center (Cc), that is, the time at the points 1A to 3A of the high level side threshold (THh) set with respect to the reference value, the low level side threshold Times at (THL) points 1B to 3B are obtained by the signal processing units 44a to 44c.

Next, time data at points 1A to 3A of the high-level threshold (THh) obtained for each signal waveform by the signal processing units 44a to 44c in the A / D converters 46a to 46c, the low-level threshold The time data at (THL) points 1 </ b> B to 3 </ b> B is converted into digital data and output to the first processing unit 160.
In the first processing unit 160, then determining the time alpha ₁ between the point 1A and the point 1B in the signal waveform 54a of the coil sensor 40a. Next, determine the time alpha ₂ between the point 2A and a point 2B in the signal waveform 54b of the coil sensor 40b. Next, a time α ₃ between the point 3A and the point 3B in the signal waveform 54c of the coil sensor 40c is obtained.
As described above, the times α ₁ , α ₂ , and α ₃ correspond to the slopes γ ₁ , γ ₂ , and γ _{3 of} the signal waveforms 54a to 54c, respectively. These inclinations γ ₁ , γ ₂ , and γ ₃ correspond to the heights of the signal waveforms 54 a to 54 c. For this reason, the height of each signal waveform 54a-54c can be relatively compared by calculating | requiring the ratio of time (alpha) ₁ , (alpha) ₂ , (alpha) ₃ of each signal waveform 54a-54c.

In this embodiment, we obtain the degree beta ₁₂ of the slope of the coil sensor 40b for the coil sensor 40a. This β ₁₂ is obtained by β ₁₂ = (α ₁ −α ₂ ) / α ₁ .
Also, determine the degree beta ₁₃ of the slope of the coil sensor 40c to the coil sensor 40a. This β ₁₃ is obtained by β ₁₃ = (α ₁ −α ₃ ) / α ₁ .

In this embodiment, the degree of inclination β ₁₂ of the coil sensor 40b with respect to the coil sensor 40a, that is, the signal waveform of the induced electromotive voltage of the coil sensor 40a arranged on the bottom side and the signal waveform of the induced electromotive voltage of the coil sensor 40b. It has been found that the signal intensity ratio (signal height ratio) corresponds to the approach angle in the left-right direction of the golf club head.
In the present embodiment, the approach angle in the left-right direction is, for example, arranged at the inclination degree β ₁₂ , that is, at the bottom, using the measurement value obtained by the moving body measurement apparatus described in Japanese Patent Laid-Open No. 2005-253505 as a reference value. By calibrating the signal intensity ratio (signal height ratio) between the signal waveform of the induced electromotive voltage of the coil sensor 40a and the signal waveform of the induced electromotive voltage of the coil sensor 40b, the approach angle in the left-right direction is obtained with high accuracy. Can do.

Further, in the present embodiment, the difference between the inclination of the coil sensor 40a and the inclination of the coil sensor 40b, that is, the signal waveform of the induced electromotive voltage of the coil sensor 40a arranged at the bottom and the signal waveform of the induced electromotive voltage of the coil sensor 40b. Signal intensity difference (signal height difference) corresponds to the left and right approach angle of the golf club head.
In the present embodiment, with respect to the approach angle in the left-right direction, for example, using a measurement value obtained by the moving body measuring apparatus described in Japanese Patent Application Laid-Open No. 2005-253505 as a reference value, a difference in inclination, that is, a coil sensor arranged at the bottom By calibrating the signal intensity difference (signal height difference) between the signal waveform of the induced electromotive voltage of 40a and the signal waveform of the induced electromotive voltage of the coil sensor 40b, the approach angle in the left-right direction is obtained with high accuracy. Can do.
Therefore, in the present embodiment, the signal intensity ratio (signal height ratio) of the signal waveform of the induced electromotive voltage between the coil sensor 40a and the coil sensor 40b disposed on the bottom side or the coil sensor 40a and the coil sensor disposed on the bottom side. By calculating the difference in signal intensity (signal height difference) of the signal waveform of the induced electromotive voltage from 40b, the approach angle in the left-right direction can be determined.

The inclination degree beta ₁₂ of the coil sensor 40b to the coil sensor 40a described above, as shown in FIG. 11 (a), the degree of inclination in the value of the approach angles of the right and left measured by the mobile measuring device which is a reference value beta After obtaining ₁₂ , a regression equation is obtained. The regression equation is, for example, is represented by a straight line R _4. In this way, it is possible to calibrate the degree of inclination beta _12.
Regression equation represented by the straight line R ₄ is, for example, stored in the storage unit 170 of the processing apparatus 16. When measuring the approach angle of the left and right, by the first processing unit 160, a regression equation represented by the straight line R ₄ is called from the storage unit 170, it enters right and left based on the degree beta ₁₂ in the regression equation and inclination A corner is required.

In the coil sensor, since the magnetic force (corresponding to the magnitude of the slope) is inversely proportional to the square of the distance, the degree of inclination beta ₁₂ is the curve R ₅ represented by a quadratic function shown in FIG. 11 (b) in towards the approximation quadratic equation is highly correlated than the regression equation represented by the straight line R ₄ shown in FIG. 11 (a) represented. In this case, the regression equation represented by the curve R ₅ is, for example, stored in the storage unit 170 of the processing apparatus 16. When measuring the approach angle of the left and right, by the first processing unit 160, a regression equation from the storage section 170 represented by the curve R ₅ is called, enters right and left based on the degree beta ₁₂ in the regression equation and inclination A corner is required.

In the behavior measuring apparatus 12 of the present embodiment, the head speed, the vertical approach angle, and the horizontal approach angle can be measured with relatively high measurement accuracy with a simple device configuration using a coil sensor.
In the present embodiment, the results of the vertical approach angle and the horizontal approach angle obtained by measuring when the golfer G swings can be displayed on the monitor 32 as numerical values.
Further, in the behavior measurement apparatus 12 of the present embodiment, the arithmetic processing unit is the first processing unit 160 of the processing device 16, but the present invention is not limited to this, and the behavior measurement apparatus 12 is provided with an arithmetic processing unit. Also good.

Further, for example, as shown in FIG. 12, the vertical axis has an approach angle (up and down) and the horizontal axis has an approach angle (left and right), and four types of A type, B type, C type, and D type in advance. On the chart 60 classified into the above, the results of the vertical approach angle and the horizontal approach angle obtained by measuring when the golfer G swings can be plotted and displayed on the monitor 32.
Thus, by plotting and displaying on the chart 60 on the monitor 32, the golfer G can easily perceive what the behavior of the golf club head 22 is when the golfer G swings.

When the golf club head hits a golf ball, a golf swing in which the golf club head moves upward from below with respect to a horizontal plane is called an upper blow, and a golf swing that moves in the opposite direction is called a down blow.
Further, a golf swing in which the golf club head moves from the inside to the outside as viewed from the golfer with respect to the target direction in which the golf club head attempts to fly the golf ball is referred to as inside out, and the golf club head moves from the outside to the inside. Golf swing is called outside-in.
Therefore, in FIG. 12, the A type and the B type indicate that the approach angle (up and down) is positive and the upper blow. The C type and D type indicate that the approach angle (up and down) is negative and that it is down blow.

On the other hand, the A type and the D type indicate that the approach angle (left and right) is positive and the inside is out. The B type and the C type have negative approach angles (left and right), indicating that they are outside-in.
Therefore, in the A type, the golf ball tends to hit the draw to hook ball with a higher trajectory. In the B type, golf balls tend to hit fade to slice balls with a higher trajectory. In the C type, golf balls tend to hit fade to slice balls with a lower trajectory. In the D type, golf balls tend to hit draw to hook balls with a low trajectory.

Next, the approach angle (up and down) of the golf club head 22 in the present embodiment will be described.
FIG. 13A is a view of a golf ball b installed on a horizontal plane H by a tee t from the side. As shown in FIG. 13A, when the golf ball b is viewed from the side, A movement trajectory when the golf club head 22 moves toward the golf ball b at the time of hitting is referred to as a movement trajectory F _V of the golf club head 22. The horizontal plane H is a plane orthogonal to the plane 12b.

In this embodiment, the approach angle (up and down) refers to a plane H ₁ parallel to the horizontal plane H and a movement trajectory F _{V at} a position away from the installed golf ball b within a predetermined distance in the direction opposite to the hitting direction a. Is the angle γ _V formed by
In the present embodiment, with respect to the approach angle (up and down), the upper side of the plane H ₁ parallel to the horizontal plane H is a positive (plus) angle, and the lower side of the plane H ₁ parallel to the horizontal plane H is negative. The angle is (minus).

Next, the approach angle (left and right) of the golf club head 22 in the present embodiment will be described. FIG. 13B is a view of the golf ball b placed on the horizontal plane H by the tee t as viewed from above. In FIG. 13B, the golfer (not shown) Stand on the side.
As shown in FIG. 13B, when the golf ball b is viewed from above, the movement locus when the golf club head 22 moves toward the golf ball b at the time of hitting is the movement locus F _{H of the} golf club head 22. And
Here, with passing through the center bc of the installed golf ball b, it is parallel to the X direction and the plane X ₁ a plane perpendicular to the horizontal plane H.

The approach angle (left and right) in the present embodiment refers to an angle γ _H formed by the movement locus F _H and the surface X _{1 at} a position away from the golf ball b within a predetermined distance.
In this embodiment, the approach angle (left and right) is the opposite of the golfer than the surface X ₁ and the angle of the positive (plus), and the angle of the negative (minus) the golfer side than the surface X ₁ .

Next, a behavior measuring method for a golf club head by the behavior measuring device 12 of the present embodiment will be described.
First, the golfer G holding the golf club 20 swings so that the golf club head 22 to which the magnet 25 is attached passes through a region facing the plane 12b of the behavior measuring device 12. At this time, an induced electromotive voltage is generated in each of the coil sensors 40a to 40c according to the position through which the magnet 25 passes and the position of each of the coil sensors 40a to 40c, and this induced electromotive voltage causes the amplifiers 42a to 42c. Through the signal processing units 44a to 44c to obtain signal waveforms.

For each signal waveform, time data at points 1A to 3A on the high level side threshold (THh) and time data at points 1B to 3B on the low level side threshold (THL) are obtained, and data at each time is obtained. The data is output to the first processing unit 160 via the A / D converters 46a to 46c.
In the first processing unit 160, the time of the data at points 1A to 3A, and using the time data at the point 1b to 3b, determine the time _{T 13} and the time _{T 32} described above. Determining the difference or ratio of these times _{T 13} and the time _{T 32.} Then, the first processing unit 160 calls the regression equation represented by the straight line R ₂ or the regression equation represented by the straight line R ₃ from the storage unit 170, and the called regression equation, time T ₁₃ , time T _{13 Based on} the difference of ₃₂ (time T ₁₃ -T ₃₂ ) or the ratio of time T ₁₃ and time T ₃₂ (time T ₁₃ / T ₃₂ ), the vertical approach angle is determined.
Further, in the first processing unit 160, the time α of the signal waveform of the coil sensor 40a and the time α from the point A to the point B of the signal waveform of the coil sensor 40b are obtained. Determining the degree beta ₁₂ of the slope of the coil sensor 40b for the coil sensor 40a. Then, the first processing unit 160 calls the regression equation represented by the straight line R ₄ or the regression equation represented by the curve R ₅ from the storage unit 170, and sets the recalled regression equation and the slope β ₁₂ to the called regression equation. Based on this, an approach angle in the left-right direction is obtained.

Furthermore, seek time _{T 12,} for example, by the first processing unit 160, a regression equation represented by the straight line _{R 1} is called from the storage unit 170, the linear _{R 1} in the regression equation and the time represented _{T 13} Based on the above, the head speed is required. Note that the head speed, because you know the distance L of the base, may be calculated head speed by using the distance L times T ₁₂ and bottom.
In this manner, the behavior measuring device 12 can determine the vertical approach angle, the horizontal approach angle, and the head speed when the golfer G swings. The angle and the head speed may be stored in the storage unit 170.
Further, the results of the vertical approach angle and the horizontal approach angle obtained by measuring when the golfer G swings can be displayed on the monitor 32 as numerical values or the chart 60 shown in FIG.

In behavior measuring device 12 of the present embodiment, the swing golfer G, for example, the movement trajectory F _V levels blow approach angle as shown in FIG. 14 (a) (up and down), as shown in FIG. 14 (b) If the movement trajectory _{F H} of approach angle (left and right) of the golf club head has moved straight, the coil sensor 40a, 40b, induced electromotive force is generated in the 40c, the signal waveform 56a shown in FIG. 14 (c), 56b, 56c is obtained. In this case, in the coil sensors 40a, 40b, and 40c, induced electromotive voltages are generated at equal intervals, and the same signal waveforms 56a, 56b, and 56c are obtained except that the generation times are different.

Further, the swing golfer G, for example, the movement trajectory of approach angle, as shown in FIG. 15 (a) movement trajectory F _V Upper blown (vertical), the approach angle as shown in FIG. 15 (b) (right and left) If F _H golf club head has moved straight, the coil sensor 40a, 40b, induced electromotive force is generated in the 40c, the signal waveform 56a shown in FIG. 15 (c), 56b, 56c is obtained. In this case, the signal intensities of the signal waveforms 56a, 56b, and 56c are the same, but the generation time of the induced electromotive force of the coil sensor 40c is less than that of the level blow (see FIGS. 14A and 14C). Shift to the coil sensor 40b side.

Further, the swing golfer G, for example, the movement trajectory of approach angle, as shown in FIG. 16 (a) movement trajectory F _V is down blow of (upper and lower), the approach angle as shown in FIG. 16 (b) (right and left) If F _H golf club head has moved straight, the coil sensor 40a, 40b, 40c induced electromotive force is generated in the signal waveform 56a shown in FIG. 16 (c), 56b, 56c is obtained. In this case, the signal intensities of the signal waveforms 56a, 56b, and 56c are the same, but the generation time of the induced electromotive force of the coil sensor 40c is less than that of the level blow (see FIGS. 14A and 14C). Shift to the coil sensor 40a side.

Further, the swing golfer G, for example, the movement trajectory of approach angle, as shown in FIG. 17 (a) movement trajectory F _V level blown (vertical), the approach angle as shown in FIG. 17 (b) (right and left) When the golf club head moves while F _H is inside-out, induced electromotive voltages are generated in the coil sensors 40a, 40b, and 40c, and signal waveforms 56a, 56b, and 56c shown in FIG. 17C are obtained. In this case, the signal strength increases in the order in which the golf club head approaches the coil sensors 40a, 40c, and 40b, that is, in the order of the signal waveform 56a, the signal waveform 56c, and the signal waveform 56b.

Further, the swing golfer G, for example, the movement trajectory of approach angle, as shown in FIG. 18 (a) movement trajectory F _V level blown (vertical), the approach angle as shown in FIG. 18 (b) (right and left) When the golf club head moves while F _H is outside-in, induced electromotive voltages are generated in the coil sensors 40a, 40b, and 40c, and signal waveforms 56a, 56b, and 56c shown in FIG. 18C are obtained. In this case, the signal strength decreases in the order in which the golf club head moves away from the coil sensors 40a, 40c, and 40b, that is, in the order of the signal waveform 56a, the signal waveform 56c, and the signal waveform 56b.

Further, the swing golfer G, for example, the movement trajectory of approach angle, as shown in FIG. 19 (a) movement trajectory F _V Upper blown (vertical), the approach angle as shown in FIG. 19 (b) (right and left) When the golf club head moves while F _H is inside-out, induced electromotive voltages are generated in the coil sensors 40a, 40b, and 40c, and signal waveforms 56a, 56b, and 56c shown in FIG. 19C are obtained. In this case, the signal strength increases in the order in which the golf club head approaches the coil sensors 40a, 40c, and 40b, that is, in the order of the signal waveform 56a, the signal waveform 56c, and the signal waveform 56b. Furthermore, as compared with level blow (see FIGS. 14A and 14C), the generation time of the induced electromotive force of the coil sensor 40c is shifted to the coil sensor 40b side.

Next, the golf ball behavior measuring device 14 will be described.
FIG. 20 is a schematic view showing a golf ball behavior measuring device used in the golf club selection system according to the embodiment of the present invention.

  A golf ball behavior measuring device 14 (hereinafter referred to as a measuring device 14) shown in FIG. 20 is used together with the behavior measuring device 12, and after the golfer G hits the golf ball b with the golf club 20, For measuring the initial ballistic parameters of the golf ball b, and having the function of measuring, for example, ball speed, launch angle, left and right launch angle, back spin, and side spin as the behavior parameters of the golf ball b, Has a function to calculate carry, left / right shift, and total distance.

The measuring device 14 includes mirrors 62 a and 62 b, an adjustment mirror 62 c, a half mirror 62 d, a CCD camera 64, and a strobe (not shown), and is connected to the second processing unit 162. The CCD camera 64 is controlled by the controller 162d of the second processing unit 162. The CCD camera 64 is controlled by the controller 162d to automatically open and close the electronic shutter for imaging at a predetermined timing.
On the surface 60a of the substrate 60, mirrors 62a and 62b, an adjustment mirror 62c, a half mirror 62d, and a CCD camera 64 are arranged as will be described later.

The substrate 60, the mirrors 62a and 62b, the adjustment mirror 62c, the half mirror 62d, and the CCD camera 64 constitute a main body 66, and the main body 66 is housed in a case (not shown) and portable, for example. It has become. Thereby, the measurement device 14 can be carried and the behavior of the hit golf ball b can be measured in a predetermined environment regardless of indoors or outdoors.
In the measuring device 14, the main body portion 66 accommodated in the case is disposed at a position facing the golf player G who strikes the golf ball b and the golf ball b.
The measuring device 14 is provided closer to the screen 38 than the golf club head behavior measuring device 12.

  The measuring device 14 of the present embodiment fixes each arrangement, and stores it in an arbitrary case in which the surfaces through which the two subject images projected on the two mirrors 62a and 62c pass are covered with a transparent body. It can be made portable and can be easily moved and installed in any location. Of course, in addition to this, a strobe device that illuminates the golf ball at the time of imaging the golf ball, or a natural or artificial light illuminating device having sufficient brightness to illuminate the golf ball in some cases is used.

  The controller 162 d is connected to the CCD camera 64 and is connected to the second processing unit 162 so that the image data of the image output from the CCD camera 64 is supplied to the second processing unit 162.

The mirrors 62a and 62b are mirrors that reflect an image of the golf ball b when the golf ball b is viewed from two different directions, and are disposed in the front-rear direction of the launch direction of the golf ball b.
The golf ball b is launched in the launch direction by the trial hit of the golfer G, but the image of the golf ball b immediately after being launched is reflected by the mirror 62b and projected onto the half mirror 62d. The image is configured to pass through the half mirror 62d and reach the CCD camera 64.
Further, the image of the golf ball b immediately after being launched is reflected by the mirror 62a, and then reflected by the adjustment mirror 62c, and the image of the golf ball b reflected by the adjustment mirror 62c is further reflected by the half mirror 62d. The CCD camera 64 is configured.

When such two golf ball b images are taken by the CCD camera 64, the mirrors 62a, 62b or the adjusting mirror 62c are arranged so that the images of the golf balls b viewed from different directions do not overlap as much as possible. The arrangement has been adjusted.
Further, since the adjustment mirror 62c of the present embodiment reflects the image projected together with the mirror 62a and the half mirror 62d, the image of the golf ball b captured by the CCD camera 64 is a mirror image of the golf ball b. On the other hand, the image of the golf ball b that is reflected by the mirror 62b, transmitted through the half mirror 62d, and reaches the CCD camera 64 is also a mirror image. As described above, the adjustment mirror 62c is an adjustment mirror for making the image of the golf ball b reflected by the mirror 62a and reaching the CCD camera 64 into a mirror image. The golf reflected by the mirror 62b and reaching the CCD camera 64 Similar to the image of the ball b, it is a mirror image.

  The planar image 70 shown in FIG. 21 records four golf ball images 72a, 72b, 74a, and 74b obtained by imaging the golf ball b immediately after being shot twice at a constant time interval. .

Here, the golf ball image 72a is an image of the golf ball b by the first (first) strobe emission reflected by the mirror 62a, the adjustment mirror 62c, and the half mirror 62d, and the golf ball image 74a is a mirror. It is an image of the golf ball b by the first strobe light emission reflected by 62b and transmitted through the half mirror 62d.
On the other hand, the golf ball image 72b is an image of the golf ball b by the second strobe emission reflected by the mirror 62a, the adjustment mirror 62c, and the half mirror 62d, and the golf ball image 74b is reflected by the mirror 62b. It is an image of the golf ball b by the second strobe emission that has passed through the half mirror 62d.
Here, in the planar image 70, the tilt angle of the reflecting surface of the mirrors 62a, 62b or the adjustment mirror 62c is arranged so that the golf ball image 72a is imaged on the lower side and the golf ball image 74a is imaged on the upper side. Adjustments have been made.
Further, the image of the golf ball b to be imaged is a mirror image using the adjustment mirror 62c, and the image of the golf ball b moves in the same direction in FIG.

  Incidentally, white circles, black circles and cross-shaped marks 76 are given as specific points on the surface of the golf ball b, and as shown in FIG. 21, the white circles, black circles and cross-shaped marks 76 are clearly visible. Yes. The mark 76 is used to calculate the back spin and side spin of the golf ball b as will be described later.

As illustrated in FIG. 20, the second processing unit 162 includes an image reading unit 162a, a position measurement unit 162b, a calculation unit 162c, and a controller 162d.
Image data of the planar image 70 captured by the CCD camera 64 is sent to the second processing unit 162.

  The image reading unit 162a captures the image data of the planar image 70 captured by the CCD camera 64 as digital data, and performs unnecessary image processing such as the surrounding environment by performing image processing. The image is subjected to image processing to calculate the position of the center of gravity of the golf ball images 72a, 72b, 74a, and 74b. Subsequently, the image of the image of the mark 76 formed on the golf ball is subjected to image processing. This is a part that calculates the center position of the image and outputs it to the position measuring unit 162b.

When the position measurement unit 162b receives the data of the center of gravity of the golf ball images 72a, 72b, 74a, and 74b and the center position of the image of the mark 76, the position measuring unit 162b receives the vertical plane and horizontal plane in the actual movement path of the golf ball b. This is a part for calculating the component.
That is, as shown in FIG. 20, since the two mirrors 62a and 62b are inclined by an arbitrary angle, the image of the golf ball in the image projected as a flat image 70 by being projected by these mirrors 62a and 62b. The coordinates of the barycentric positions of 72a, 72b, 74a and 74b and the coordinates of the center position of the image of the mark 76 are obtained by combining vertical and horizontal plane components in accordance with the inclination angles of the mirrors 62a and 62b. Therefore, according to the arrangement of the mirrors 62a and 62b, the numerical values of the coordinates of the center of gravity of the golf ball images 72a, 72b, 74a and 74b and the coordinates of the center position of the image of the mark 76 become the components of the vertical and horizontal planes. Compute and disassemble. Then, the coordinates of the center of gravity of the golf ball at the time of the first strobe light emission, the coordinates of the center position of the mark 76 relative to the center of gravity position, and the second strobe light emission time for each of the vertical plane and horizontal plane components obtained by the decomposition. The coordinates of the gravity center position of the golf ball and the coordinates of the center position of the mark 76 with respect to this gravity center position are measured. Each measured coordinate is sent to the calculation unit 162c.

The calculation unit 162c calculates behavior parameters indicating the behavior of the golf ball b after hitting, and the coordinates of the center of gravity of the golf ball b and the center position of the mark 76 at the time of first and second strobe light emission. The initial velocity (ball speed), vertical and horizontal launch angles of the golf ball are calculated by obtaining the moving distance and moving direction of the center of gravity of the golf ball b from the coordinates.
In addition, the calculation unit 162c calculates the rotation angular velocity and the rotation direction of the golf ball b by obtaining the movement distance and movement direction of the center position of the mark 76, and calculates the back spin and the side spin.

  The calculation unit 162c, for example, estimates the flight distance of the golf ball by adding an environmental condition such as a wind speed at the time of the test shot to the initial velocity, launch angle, rotation direction, and rotation angle of the golf ball, or calculating. A golf ball carry, run, slice, or hook bend is estimated, and a final flight distance (total distance) and a bend amount (left / right misalignment) are calculated. The calculation result by the calculation unit 84 is displayed on the monitor 32. Here, the data transfer for these operations and the operation instructions are controlled by the controller 162d.

  In the measuring device 14, in order to measure the rotational angular velocity and the rotational direction of the launched golf ball, such as back spin and side spin, the golf ball b is specified with a black circle or cross mark 76 as a mark. A rotation angular velocity and a rotation direction of the golf ball are measured based on a movement distance and a movement direction on the surface of the golf ball b at the position of the mark 76.

Next, a method for measuring the behavior parameter of the golf ball b in the measuring device 14 will be described.
In the measuring device 14, when the golf club G starts swinging the golf club 20, and the golf club head of the golf club 20 passes a detection position of a golf club head detection device (not shown) installed in the area immediately before the impact, the trigger signal Is generated in the golf club head detection device. Then, it is sent from the golf club head detection device to the controller 162d.
The controller 162d, as the electronic shutter of the CCD camera 64 is opened from the rising of the trigger signal after _{one second,} T, camera actuation signal is generated and sent to the CCD camera 64 by the camera operation signal, ₂ seconds electronic shutter is T open.

At the same time, a strobe light emission signal is sent from the controller 162d to a strobe (not shown), and during the T ₂ seconds when the electronic shutter is opened, the strobe light is emitted twice at a time interval of T ₃ seconds (step 106). Illuminate. By two flash emission of T ₃ seconds manner, punched out which is the initial trajectory is captured golf ball b in immediately after, T ₃ seconds one planar image 70 the image of the golf ball b is imaged before and after the time course of Is obtained.

  Next, image data of a planar image obtained by imaging the initial trajectory of the obtained golf ball b is read as digital data by the image reading unit 162a, and unnecessary images such as the surrounding environment are erased. The image of the diameter is subjected to image processing, and the gravity center positions of the golf ball images 72a, 72b, 74a, and 74b are calculated. At the same time, the image of the image of the mark 76 formed on the golf ball b is subjected to image processing, and the center position of the image of the mark 76 is calculated.

These positions are measured by the position measuring unit 162 b, the behavior parameters indicating the behavior of the golf ball b described above are calculated by the computing unit 162 c, and the behavior parameter data are stored in the storage unit 170.
In addition, by calculating the behavior parameters by adding environmental conditions such as wind speed at the time of trial hit, the flight distance of the golf ball is estimated, and the golf ball carry, run, slice, hook curvature is estimated, carry, The left / right deviation (bending amount) and the final flight distance (total distance) are calculated. This calculation result is also stored in the storage unit 170 as behavior parameter data.

  As described above, in the system 10 of the present embodiment, when the golf player G makes a trial hit, the behavior parameters of the golf ball b (ball speed, launch angle, left and right launch angle, backspin, as described above) for each ball. , Side spin, carry, left / right misalignment, total distance) and behavior parameters of the golf club head 22 (head speed, vertical approach angle, lateral approach angle) are measured, and these data are stored in the storage unit 170. Input and memorize.

Further, the control unit 164 causes the monitor 32 to display the behavior parameters obtained by measuring the behavior of the golf ball b as shown in a screen 80 shown in FIG.
The screen 80 shows a state in which the golfer G hits five golf balls b, for example, and a ball trajectory 84 is displayed in a first area 82 on a figure 86 imitating a golf course. The
Furthermore, a golf ball behavior parameter column 88 is provided for each hit ball, and the measurement result of the golf ball behavior parameter is displayed in the form of Table 88a.

  In addition, the control unit 164 can display behavior parameters obtained by measuring the behavior of the golf club head 22 on the monitor 32 as shown in a screen 83 in FIG. On this screen 83, the locus 84a of the golf ball b hit by the golfer G is displayed on the figure 86a imitating the golf course from the golfer G side, that is, from the tee side.

  Thus, in this embodiment, the locus of the golf ball b hit by the golfer G can be displayed as shown in FIGS. Thereby, the golfer G can easily know the trajectory of his / her hit ball. Note that the display form of the trajectory of the golf ball b hit by the golfer G is not limited to FIGS. 22A and 22B, and may be displayed in a form viewed from the lateral direction of the hitting direction. Good.

As described above, in the system 10 of the present embodiment, every time the golfer G hits, the head speed of the golf club head 22, the vertical approach angle and the horizontal approach angle are measured, and the ball is hit. The ball speed, launch angle, left and right launch angle, back spin, side spin, carry, left / right shift, and total distance of the golf ball b are also required.
Further, the vertical approach angle and the horizontal approach angle of the golf club head 22 are plotted on the chart 60 shown in FIG. Thereby, the golfer G can perceive the result of the swing. Thus, in order to allow the golfer G to select a golf club, the vertical approach angle and the horizontal approach angle are displayed on the monitor 32.

Further, as described above, the golf club data is stored in advance in the database 174 of the processing device 16 together with the golf club head characteristic data for a plurality of golf clubs that are actually prepared. Moreover, an identification number is assigned to each of the plurality of golf clubs for which the actual product is prepared, and the identification number and the data of the golf club are associated with each other. Furthermore, characteristic data of the golf club head suitable for each type is stored for each of the classified A type to D type.
The processing device 16 selects the optimum golf club head characteristic data for each of the classified A type to D type from the stored golf club head characteristic data from the database 174. Then, the golf club including the golf club head selected together with the identification number is displayed on the monitor 32. In this way, the golfer G can obtain information on the golf club corresponding to the swing.

In the present embodiment, whether or not the selected golf club is appropriate is determined by attaching the magnet 25 to the golf club head of the actual golf club displayed on the monitor 32 and hitting the golfer G again. get. At this time, the vertical and horizontal approach angles of the golf club head 22 and the trajectory of the golf ball are measured.
Then, the vertical approach angle and the horizontal approach angle are plotted on the chart 60 shown in FIG. In this case, if the position of the plot is close to a target value based on the golfer's attributes such as head speed and body characteristics, it can be determined that the selected golf club is appropriate.
Also, in the measurement of the behavior of the golf ball, the selected golf ball was sliced when the hit ball became straight, or when the hit ball became hooked but the hit ball became straight The club can be determined to be appropriate.

  As described above, in the system 10 of this embodiment, the behavior of the golf club head and the behavior of the golf ball are measured, and a golf club head having a predetermined characteristic is selected from the characteristic data based on each measurement result. By selecting the golf club data of the golf club having, the swing can be close to the level swing and close to the inside-in. Furthermore, it is possible to select golf club data of a golf club that can fly a hit ball straight.

As described above, in the processing device 16, for example, a golf club is selected from the golf club data of the golf club for each of the classified A type to D type.
For example, a golf club set so that the dynamic loft angle does not increase and the face surface does not close when viewed from the golfer is selected as the A type.
In the B type, the orientation of the face immediately before hitting the golf ball does not turn upward due to the centrifugal force acting on the center of gravity of the golf club head, that is, the dynamic loft angle is not increased, and the face surface is away from the golfer. A golf club set so as not to open when viewed is selected.
In the C type, the orientation of the face immediately before hitting the golf ball is upward due to the centrifugal force acting on the center of gravity of the golf club head, that is, the dynamic loft angle is increased and the face surface is viewed from the golfer. A golf club set so as not to open is selected.
For the D type, a golf club that has a large dynamic loft angle and is set so that the face surface does not close when viewed from the golfer is selected.

  As these golf clubs, those obtained by adjusting the centroid distance and centroid angle of the golf club head are preferably used. In other words, golf club heads that are optimal for types A to D are configured so that at least one of the center-of-gravity distance and the center-of-gravity angle is different. For example, the golf club head optimal for the A type has a different center of gravity angle from the golf club head optimal for the B type, and the center of gravity angle of the golf club head optimal for the A type is the center of gravity angle of the golf club head optimal for the B type. Smaller than The golf club head optimal for the A type has a different center of gravity distance from the golf club head optimal for the C type. The center of gravity distance of the golf club head optimal for the A type is the center of gravity of the golf club head optimal for the C type. Short compared to distance.

  As shown in FIG. 23, the center-of-gravity distance m of the golf club head is defined as the shortest straight line from the center-of-gravity point G of the golf club head to the central axis S of the golf club shaft or an extension of the central axis. This distance is the shortest straight line. The center of gravity angle θ means that a golf club head is placed on a horizontal plane according to a set lie angle, and the shortest straight line and the central axis S of the golf club shaft or an extension line of the central axis are directed from the vertical direction to the horizontal plane. An angle formed between the shortest straight line and the central axis of the golf club shaft or an extension line of the central axis when projected. That is, the barycentric angle θ is an angle representing the direction of the shortest straight line.

In this embodiment, the wood-based golf club head suitable for A type to D type is prepared and selected by adjusting the center-of-gravity distance m and the center-of-gravity angle θ, but instead of the center-of-gravity distance, the center-of-gravity point is changed from the horizontal plane. What adjusted the height of can also be used. In particular, it is preferable to use an iron-based golf club with an adjusted center of gravity. The height of the center of gravity means a dimension defined by the F _GH as described in JP 2005-211570.

The above-described center-of-gravity distance m can be obtained, for example, as follows.
As shown in FIG. 24A, the measurement is performed by a seesaw-type balance 90 that can swing in the direction of arrow U about a fulcrum 91. The balance 90 has a shaft pin 92 having a fit with no gap with respect to the hosel hole of the golf club head, and is balanced so that the arm 93 is horizontal when the golf club head is not mounted. The measurement of the center-of-gravity distance m from the golf club shaft axis of the center of gravity G of the golf club head is performed by mounting and fixing a golf club head having a mass W on the shaft pin 92 as shown in FIG. Then, a precision balance is placed at a predetermined position (L ′) so that the arm 93 is horizontally balanced, and the load when the balance 90 is suspended is measured. Then, the direction of the golf club head mounted on the shaft pin 92 is adjusted so that this load is maximized, and the load W ′ when it is maximized is obtained. Based on this load W ′, from the balance formula L = (W ′ × L ′) / W is calculated. This calculated value is the center-of-gravity distance m.

Moreover, in this embodiment, the measurement result can be displayed for every measuring device by making the number of the monitors 32 the same as the number of measuring devices. As a result, many measurement results can be viewed at once, and the frequency of switching the measurement result display screen can be reduced.
Furthermore, by providing a screen 38 on which the measurement results are displayed facing the direction of the hit ball, the golfer G can easily know the swing motion, the behavior of the golf club head, the direction of the hit ball, etc. from the addressed position. Can do. In addition, the display on the screen 38 may divide the area so that many measurement results can be viewed at once.
Note that the projector 33 and the screen 38 are not necessarily provided. For example, when the ball is hit with a tee ground or a gauge with a released ball direction, the projector 33 and the screen 38 need not be provided.

  The present invention is basically as described above. As described above, the golf club head behavior measuring device, the golf club head behavior measuring method, and the golf club selection system of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiment, and departs from the gist of the present invention. It goes without saying that various improvements or changes may be made without departing from the scope.

10 Golf club selection system (system)
12 golf club head behavior measuring device 14 golf ball behavior measuring device 16 processing device 20 golf club 22 golf club head 24 golf club shaft 26 grip 32 monitor 33 projector 34 operating means 38 screen 160 first processing unit 162 second processing unit 164 control Unit 170 storage unit 172 setting unit 174 database G golfer

Claims (15)

A golf club head behavior measuring device for measuring the behavior of the golf club head when a golfer swings a golf club having a golf club head provided with a magnet,
Three coil sensors arranged at the positions of the respective vertices of the triangle in the same plane;
A signal processing unit that obtains the induced electromotive voltage generated in each coil sensor by the magnet and obtains the signal waveform of the induced electromotive voltage, and specifies the generation time of each induced electromotive voltage;
Among the three coil sensors, one coil sensor is used in common, and two sets of two coil sensors are made. For each set, a difference in generation time of the induced electromotive voltage of each coil sensor is obtained, and each set And an arithmetic processing unit for obtaining a first moving direction of the golf club head in a plane parallel to a plane on which the coil sensor is arranged based on the difference or ratio of the generation times of Golf club head behavior measuring device. The signal processing unit obtains the slope of each signal waveform from the signal waveform of each coil sensor,
The arithmetic processing unit obtains a second moving direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on a difference or ratio of inclinations of the signal waveforms of the coil sensors. The behavior measuring device for a golf club head according to claim 1. A golf club head behavior measuring device for measuring the behavior of the golf club head when a golfer swings a golf club having a golf club head provided with a magnet,
A coil sensor disposed in the same plane at each vertex of the triangle and two of the three on the horizontal line;
The induced electromotive voltage generated in each coil sensor by the magnet is acquired, the signal waveform of the induced electromotive voltage is obtained, the generation time of each induced electromotive voltage is specified, and the signal waveform of each coil sensor is determined. A signal processing unit for obtaining the slope of each of the signal waveforms;
A difference between the generation times of the induced electromotive voltages of the two coil sensors arranged on the horizontal line is obtained, and the moving speed of the golf club head is determined based on the difference between the generation times of the induced electromotive voltages of the two coil sensors. Seeking
Further, among the three coil sensors, one coil sensor is used in common, and two sets of two coil sensors are made. For each set, a difference in the generation time of the induced electromotive force of each coil sensor is obtained. And determining a first moving direction of the golf club head in a plane parallel to a plane on which the coil sensor is disposed based on the difference or ratio of the generation time of
An arithmetic processing unit for obtaining a second moving direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on a difference or ratio of inclinations of the signal waveforms of the coil sensors. A golf club head behavior measuring device characterized by that. In the signal processing unit, a high level threshold and a low level threshold are preset with respect to the induced electromotive voltage, and the signal processing unit generates in the high level threshold and the low level threshold. To identify the time,
The arithmetic processing unit obtains a difference in generation time of the induced electromotive force of each coil sensor for each set using the generation time at the high level threshold and the generation time at the low level threshold. The behavior measuring device for a golf club head according to any one of? In the signal processing unit, a high level threshold and a low level threshold are preset with respect to the induced electromotive voltage, and the signal processing unit generates in the high level threshold and the low level threshold. To identify the time,
4. The golf club according to claim 2, wherein the arithmetic processing unit obtains an inclination of the signal waveform of each coil sensor using an occurrence time at the high level threshold and an occurrence time at the low level threshold. Head behavior measurement device. In the same plane, a coil sensor is arranged at the position of each apex of the triangle, and the golfer can pass the golf club head provided with the magnet through a region facing the surface on which each coil sensor is arranged. Identifying the time of occurrence of the induced electromotive force generated in each coil sensor by a recording magnet provided in the golf club head when the golf club is swung;
Of the three coil sensors arranged at the position of the apex of the triangle, one coil sensor is used in common, and two sets of two coil sensors are formed. A process for determining the difference in occurrence time;
And a step of obtaining a first moving direction of the golf club head based on a difference or ratio of the difference in the generation time of each set. Furthermore, from the signal waveform of each coil sensor, calculating the slope of each signal waveform,
A step of obtaining a difference or ratio of inclination of the signal waveform of each coil sensor, and a second of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on the difference or ratio of inclination. The method of measuring a behavior of a golf club head according to claim 6, further comprising a step of determining a moving direction of the golf club. A golf club head in which a coil sensor is arranged at the position of each vertex of a triangle having two vertices on the horizontal line in the same plane, and a magnet is provided in a region facing the surface on which each coil sensor is arranged When the golfer swings the golf club so as to pass, the step of specifying the generation time of the induced electromotive force generated in each coil sensor by the recording magnet provided in the golf club head;
A difference between the generation times of the induced electromotive voltages of the two coil sensors arranged on the horizontal line is obtained, and the moving speed of the golf club head is determined based on the difference between the generation times of the induced electromotive voltages of the two coil sensors. The process of seeking
Of the three coil sensors arranged at the position of the apex of the triangle, one coil sensor is used in common, and two sets of two coil sensors are formed. Obtaining a difference in generation time, and determining a first moving direction of the golf club head based on a difference or ratio of the difference in the generation time of each set;
From the signal waveform of each coil sensor, calculate the slope of each signal waveform, determine the difference or ratio of the slope of the signal waveform of each coil sensor, based on the difference or ratio of the slope, A method for measuring a behavior of a golf club head, comprising a step of obtaining a second moving direction of the golf club head in a plane orthogonal to a plane on which a coil sensor is arranged. Furthermore, with respect to the induced electromotive voltage, there is a step of setting a high level threshold and a low level threshold in advance, and specifying an occurrence time at the high level threshold and the low level threshold,
The step of determining the difference in the generation time of the induced electromotive voltage includes generating the induced electromotive voltage of each coil sensor for each set using the generation time at the high level threshold and the generation time at the low level threshold. The method for measuring a behavior of a golf club head according to any one of claims 6 to 8, wherein a time difference is obtained. Furthermore, with respect to the induced electromotive voltage, there is a step of setting a high level threshold and a low level threshold in advance, and specifying an occurrence time at the high level threshold and the low level threshold,
The step of determining the difference or ratio of the slopes of the signal waveforms of the coil sensors uses the generation time at the high level threshold and the generation time at the low level threshold to calculate the signal waveform of each coil sensor. The golf club head behavior measuring method according to claim 7 or 8, wherein the inclination is obtained. A selection system in which a golfer swings a golf club having a golf club head provided with a magnet and selects a golf club,
In the same plane, the three coil sensors arranged at the positions of the respective vertices of the triangle and the induced electromotive voltage generated in each coil sensor by the magnet are respectively obtained to obtain the signal waveform of the induced electromotive voltage, Two sets of two coil sensors are made by sharing one coil sensor among the three coil sensors with the signal processing unit for specifying the generation time of each induced electromotive voltage, and each coil for each set A difference in the generation time of the induced electromotive force of the sensor is obtained, and based on the difference or ratio of the difference in the generation time of each set, the golf club head in the plane parallel to the plane on which the coil sensor is arranged And an arithmetic processing unit for obtaining one moving direction, and the signal processing unit obtains an inclination of each signal waveform from the signal waveform of each coil sensor. The arithmetic processing unit obtains a second moving direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on a difference or ratio of inclinations of the signal waveforms of the coil sensors. A golf club head behavior measuring device;
A golf ball behavior measuring device for measuring the behavior of the hit golf ball together with the golf club head behavior measuring device,
A display device for displaying information on the behavior of the golf club head measured by the golf club behavior measuring device, and information on the behavior of the golf ball after hitting measured by the golf ball behavior measuring device;
A processing device for classifying a golf swing into a predetermined type using the information on the first movement direction and the information on the second movement direction measured by the golf club head behavior measurement device;
A database storing a plurality of golf club data together with characteristic data of golf club heads suitable for the classification;
The said processing apparatus selects the data of the golf club suitable for the said classification from the said database according to the classified result, The golf club selection system characterized by the above-mentioned. A selection system in which a golfer swings a golf club having a golf club head provided with a magnet and selects a golf club,
In the same plane, the coil sensors are arranged at the positions of the respective vertices of the triangle and two of the three are on the horizontal line, and the induced electromotive voltage generated in each coil sensor by the magnet is acquired, and A signal processing unit that obtains a signal waveform of the induced electromotive voltage and specifies the generation time of each induced electromotive voltage, obtains a slope of each signal waveform from the signal waveform of each coil sensor, and a horizontal line A difference between the generation times of the induced electromotive voltages of the two coil sensors disposed on the same, and a moving speed of the golf club head is determined based on a difference between the generation times of the induced electromotive voltages of the two coil sensors. Further, among the three coil sensors, one coil sensor is used in common, and two sets of two coil sensors are made. For each set, the induction voltage of each coil sensor is generated. Obtaining a difference in timing, and obtaining a first moving direction of the golf club head in a plane parallel to a plane on which the coil sensor is arranged based on the difference or ratio of the difference in the occurrence times of each set, An arithmetic processing unit for obtaining a second moving direction of the golf club head in a plane orthogonal to a plane on which the coil sensor is arranged based on a difference or ratio of inclinations of the signal waveforms of the coil sensors. A golf club head behavior measuring device;
A golf ball behavior measuring device for measuring the behavior of the hit golf ball together with the golf club head behavior measuring device,
A display device for displaying information on the behavior of the golf club head measured by the golf club behavior measuring device, and information on the behavior of the golf ball after hitting measured by the golf ball behavior measuring device;
A processing device for classifying a golf swing into a predetermined type using the information on the first movement direction and the information on the second movement direction measured by the golf club head behavior measurement device;
A database storing a plurality of golf club data together with characteristic data of golf club heads suitable for the classification;
The said processing apparatus selects the data of the golf club suitable for the said classification from the said database according to the classified result, The golf club selection system characterized by the above-mentioned. And a projector for displaying information on the behavior of the golf club head measured by the golf club head behavior measuring device and information on the behavior of the golf ball after hitting measured by the golf ball behavior measuring device on a screen. ,
The golf club selection system according to claim 11 or 12, wherein the screen is provided facing the hitting direction.   The processing device uses the obtained second moving direction value and the first moving direction value in a two-dimensional chart having the second moving direction value and the first moving direction value as coordinate axes. The golf club selection system according to claim 11, wherein values are plotted and displayed on the display device. The golf club data stored in the database is composed of at least two types of golf club data,
The golf club represented by the data of the at least two types of golf clubs includes a center-of-gravity distance which is a distance of a shortest straight line connecting a center axis of the golf club shaft or an extension line of the center axis and the center of gravity of the golf club, and the shortest straight line The golf club selection system according to any one of claims 11 to 14, wherein at least one of the barycentric angles representing the orientations of the golf clubs is different.

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