KR101870184B1 - Swing measurement method and swing measurement device - Google Patents

Abstract

Improving the accuracy (accuracy) when measuring the index of the swing of a striking tool using an inertial sensor. The inertia sensor 12 is a sensor that detects the inertia of the golf club 20 in the direction of the shaft 22 of the golf club 20 and the third axis X3 in the direction of the impact surface of the golf club 20, (Face surface) of the golf club 20 in a direction substantially parallel to each other. The golf club 20 moves the second axis X2 of the three-dimensional rectangular coordinate system along the first axis Y1 of the measurement space S to the projection line (ground line) ) In a parallel direction to a reference state. The direction of the first axis X1 when the golf club 20 is held in the reference state by the adjustment assist means 16 prior to the swing is displayed visually The posture is adjusted by aligning the display and the shaft 22. [

Description

Technical Field [0001] The present invention relates to a swing measuring method and a swing measuring method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing measurement method and a swing measurement device for measuring an evaluation index of a swing of a striking tool using an inertial sensor.

In recent years, the inertia sensor has been downsized and improved in performance, and a method of measuring the swing of a golf club or the like using the inertial sensor has been spreading. For example, in Patent Document 1, a sensor capable of measuring an angular velocity or an angle around three axes of acceleration and three axes is used to detect a grip angular velocity at at least one time during a downswing, A swing analysis method for classifying a swing in a golf club by obtaining an index including a grip speed at at least one time is disclosed.

Japanese Patent Application Laid-Open No. 2013-56074

In the measurement of the swing by the inertial sensor, the relative position with respect to the reference point is measured with the position at the initial state (for example, at the start of measurement) as a reference point. For this reason, in order to evaluate the swing with an absolute reference, it is necessary to perform calibration in accordance with a predetermined reference coordinate. Particularly, when measuring the moving direction of the golf club head with respect to a predetermined reference coordinate, it is important to acquire attitude information such as the direction of the inertial sensor in the initial state.

In the above-described Patent Document 1, since the address state of the golfer is used as a reference, there is a problem that the deviation from the reference coordinates set in advance is not recognized and the accuracy of measurement is low.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to improve the degree of measurement when measuring an evaluation index of swing of a batting ball using an inertial sensor.

In order to solve the above problems and achieve the object, a swing measurement method according to the invention of claim 1 is a swing measurement method for measuring an evaluation index of swing of a batting ball using an inertial sensor, Dimensionally orthogonal coordinate is measured in the direction of the axis of the hitting ball and the third axis is parallel to the striking face of the hitting ball by measuring the acceleration and angular velocity of the hitting ball with the origin of the rectangular Cartesian coordinates as a measurement point, And the second hitting axis of the three-dimensional Cartesian coordinates is a target hitting direction of the hitting orifice, and is a ground surface of a straight line connecting the center of the impacted object and the target And adjusting the posture of the hitting orifice to the standard state by setting a state in which a state in which the hitting member is aligned in a direction parallel to a projection line of the swing member And a calculating step of calculating the evaluation index using the measured acceleration, wherein in the adjusting step, when the hitting hits are held in the reference state The orientation of the hitting orifice is adjusted such that the orientation of the first shaft of the swing arm is aligned so that the display and the axis coincide with each other, And in the adjustment step, when the jig is held in the reference state so that the direction of the shaft of the impact ball coincides with the direction of the first shaft, and the jig is raised and stood on the jig And the posture of the hitting orifice is adjusted.

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The swing measuring method according to the invention of claim 5 is characterized in that, in the acceleration measuring step, measurement of the acceleration is started by receiving a trigger signal indicating that adjustment of the attitude of the hit ball is completed.

The swing measuring method according to the invention of claim 6 is characterized in that the hitting part is a golf club.

According to a seventh aspect of the present invention, there is provided a swing measuring apparatus for measuring an evaluation index of swinging of a batting ball using an inertial sensor, the inertia sensor comprising: And the angular velocity are measured, the first axis of the three-dimensional Cartesian coordinate is fitted to the hitting orifice in such a manner that the third axis coincides with the axial direction of the hitting ball and the third axis parallel to the hitting plane of the hitting ball, , A state in which the second axis of the three-dimensional rectangular coordinate is aligned in parallel with the projection line to the plane of the straight line connecting the center of the impacted object and the target strike direction of the impact hole is set as a reference state, An adjustment assist means for performing assistance when adjusting the inertia sensor to the reference state, Wherein the adjusting auxiliary means visually displays the direction of the first axis when the hitting hits are held in the reference state and outputs the evaluation index to the measurer (F) Wherein the inertia sensor assists the adjustment of the attitude of the hit ball by aligning the display with the axis, and the inertia sensor performs the acceleration measurement from the adjusted attitude by using the adjustment assist means, And the direction of the shaft of the impact ball is aligned with the direction of the first axis when the impact ball is viewed in the reference state, and the attitude of the impact ball is adjusted by standing the impact ball on the jig .

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The swing measuring apparatus according to claim 11 includes signal generating means for outputting a trigger signal indicating that the adjustment of the posture of the hit ball is completed and the inertia sensor receives the trigger signal and outputs the trigger signal And the measurement is started.

In the swing measuring apparatus according to the invention of claim 12, the hitting part is a golf club.

According to the first aspect of the present invention, the orientation of the first axis when the impact ball is viewed in the reference state in the adjustment process is visibly displayed, the posture of the impact ball is adjusted so that the axis of the display matches the axis of the impact ball, . Thus, the direction of the three-dimensional rectangular coordinate set in the inertial sensor can be made constant with respect to the measurement space, and the degree of calculation of the evaluation index can be improved. In addition, since the posture of the ball is adjusted by standing the ball on the jig provided so as to coincide with the direction of the first axis, the posture of the ball can be adjusted with a simple configuration.

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According to the invention of claim 5, since the measurement of the acceleration is started by receiving the trigger signal indicating that adjustment of the attitude of the impact ball is completed, the measurement starting point (reference position) in the inertia sensor can be made clear.

According to the invention of claim 6, measurement can be performed using a golf club as a hitting horn.

According to the seventh aspect of the present invention, the orientation of the first shaft when the hitting hits are held in the reference state by the adjustment assist means is visibly displayed, and the posture of the hitting hitting is adjusted so as to match the axis of the hitting hitting Swing is performed. Thus, the direction of the three-dimensional rectangular coordinate set in the inertial sensor can be made constant with respect to the measurement space, and the degree of calculation of the evaluation index can be improved. In addition, since the posture of the ball is adjusted by standing the ball on the jig provided so as to coincide with the direction of the first axis, the posture of the ball can be adjusted with a simple configuration.

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According to the invention of claim 11, since the measurement of the acceleration is started by receiving the trigger signal indicating that adjustment of the attitude of the impact ball is completed, the measurement starting point (reference position) in the inertia sensor can be clarified.

According to the invention of claim 12, measurement can be performed using a golf club as a hitting point.

Fig. 1 is an explanatory view showing a configuration of a swing measuring apparatus 10 according to the embodiment. Fig.
Fig. 2 is a view showing the appearance of the inertial sensor 12. Fig.
3 is a block diagram showing the configuration of the inertial sensor 12. As shown in Fig.
Fig. 4 is a block diagram showing the configuration of the computer 14. Fig.
5 is an explanatory diagram of the movement trajectory of the golf club 20.
6 is an explanatory diagram of the left-right approach angle? _LR .
7 is an explanatory diagram of the up-and-down approach angle [theta] _UD .
8 is an explanatory diagram of the face angle [phi] at impact.
Fig. 9 is an explanatory diagram of the loft angle? At the time of hitting.
10 is an explanatory diagram of the lie angle?
11 is a flowchart showing the procedure of the swing evaluation method of the present embodiment.
Fig. 12 is an explanatory view of the case where the light emitting means 162 is used as the adjustment assist means 16. Fig.
Fig. 13 is an explanatory view of the case where the mirror 164 is used as the adjustment assist means 16. Fig.
Fig. 14 is an explanatory view of the case where the mirror 164 is used as the adjustment assist means 16. Fig.
Fig. 15 is an explanatory diagram of the case where the camera 166 and the display screen 168 are used as the adjustment assist means 16. Fig.
Fig. 16 is an explanatory diagram of the case where the camera 166 and the display screen 168 are used as the adjustment assist means 16. Fig.
17 is an explanatory diagram of the movement trajectory of the golf club 20;
18 is an explanatory diagram of reference coordinates in the measurement space S;
Fig. 19 is an explanatory diagram of a case where a jig 170 is used as the adjustment assist means 16. Fig.

Best Mode for Carrying Out the Invention Hereinafter, a preferred embodiment of the swing measuring method and swing measuring apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, a case of using a golf club as a hit ball will be described as an example.

(Example)

Fig. 1 is an explanatory view showing a configuration of a swing measuring apparatus 10 according to the embodiment.

The swing measuring device 10 is constituted by an inertial sensor 12, a computer 14 (calculating portion) and an adjusting assist means 16, and uses the inertia sensor 12 to calculate an evaluation index .

In this embodiment, the hitting part is a golf club 20. The golf club 20 is largely constituted by a shaft 22, a golf club head 24 and a grip 26. A golf club head 24 is provided on one end of the shaft 22 and a grip 26 is provided on the other end.

A ball placement position P0 for placing the golf ball B is predetermined on the ground G of the measurement space S. The ball placement position P0 is defined by a mark or the like provided on the ground G Is displayed. Alternatively, a tee is provided at the ball placement position P0, and the golf ball B is placed on the tee.

A target C as a target for ejecting the golf ball B is provided in front of the ball mount position P0. In addition, although the ball position P0 and the target C are drawn close to each other in the drawing in the drawing, the ball position P0 and the target C are actually spaced from each other by a predetermined distance Distance) to use the club that comes out of the distance).

The measuring person F swings the golf club 20 so that the golf ball B placed at the ball mounting position P0 by the face surface of the golf club head 24 is driven toward the target C do.

The acceleration and angular velocity at the time of the swing are measured by the inertia sensor 12, and the computation processing is performed by the computer 14 to calculate the evaluation index of the swing.

In addition, a straight line connecting the center point P1 of the golf ball B placed on the ball placement position P0 and the target C is the target line L. [

In the measurement space S, reference coordinates around the ball placement position P0 are set.

18 is an explanatory diagram of reference coordinates in the measurement space S;

The reference coordinates of the measurement space S are a first axis Y1 projecting the target line L onto the paper plane G and a second axis Y2 perpendicular to the paper plane G, Is defined by a second axis Y2 and a third axis Y3 extending in a direction orthogonal to the plane formed by the first axis Y1 and the second axis Y2 horizontally on the ground G .

An arbitrary position in the measurement space S can be specified using the reference coordinates defined by the first axis Y1 to the third axis Y3.

Fig. 2 is a view showing an appearance of the inertial sensor 12. Fig.

Fig. 2A is an external perspective view of the inertial sensor 12, and Fig. 2B is a view showing the mounting state of the inertial sensor 12 in the golf club 20.

The inertial sensor 12 is a small sensor unit having a wireless communication function. The sampling frequency of the inertial sensor 12 is, for example, 500 Hz to 1000 Hz, and has a time resolution several times that of a conventional sampling frequency (for example, 240 Hz) of a magnetic sensor. In addition, while the conventional magnetic sensor is of the wired type, the inertial sensor 12 can transmit the measurement result to the computer 14 wirelessly.

The inertial sensor 12 includes a case 122, a display unit 124, and an operation button 126.

2A, the case 122 of the inertial sensor 12 has a front surface 1221, a rear surface 1222, an upper surface (upper surface) 1223, a lower surface (lower surface) 1224 , A right side surface 1225 and a left side surface 1226 and has a thickness in the front-rear direction, a width in the left-right direction of the dimension larger than the thickness, and a length in the vertical direction larger than the width, Respectively.

The front surface 1221 of the case 122 shows a substantially rectangular shape in which the longitudinal direction is parallel to the vertical direction of the case 122. [

On the front surface 1221, a display section 124 and an operation button 126 are provided.

The display unit 124 is a liquid crystal monitor or the like and displays a measurement situation (a display such as " under measurement ") and a measurement result by the inertial sensor 12.

In addition, the display unit 124 may be omitted. For example, it may be possible to visually confirm the measurement condition of the inertial sensor by the lighting of the LED or the like or the lighting color.

An instruction input for instructing the start and end of measurement by the inertial sensor 12 is input to the operation button 126. [

In addition, the operation button 126 may be omitted, and an instruction input for instructing the start or end of the measurement may be given from the outside (for example, the computer 14).

A fixing portion (not shown) for mounting the case 122 to the golf club 20 is provided on the rear surface 1222 opposite to the front surface 1221.

The inertial sensor 12 measures the acceleration and the angular velocity of the measurement point in the three-dimensional Cartesian coordinates in real time.

In this embodiment, the measurement point O is set at the center point of the case 122, and the measurement three-dimensional rectangular coordinates of the inertial sensor 12 having the measurement point O as the origin are set. More specifically, the first axis X1 in the direction of the lower surface 1224 of the case 122 from the measurement point O, the second axis X2 in the direction of the right side surface 1225, and the third axis X2 in the direction of the rear surface 1222 X3) are respectively set.

When the inertial sensor 12 is mounted on the golf club 20, the first axis X1 is aligned with the axial direction of the golf club 20, that is, the shaft 22 as the striker. Also, the third axis X3 is aligned in parallel with the face of the golf club 20.

Incidentally, the inclination of the golf club 20 from the ground G in the shaft 22 (first axis X1 direction) is measured by specifying the direction of gravity g in the inertial sensor 12 .

Here, the second axis X2 of the inertia sensor 12 is displaced from the first axis Y1 (the surface of the target line L (that is, G) of the golf club 20 is referred to as " reference state of the golf club 20 ".

By holding the golf club 20 in the reference state, a corresponding relationship can be defined between the reference coordinates in the measurement space S and the measurement three-dimensional rectangular coordinates of the inertial sensor 12, and the inertia sensor 12 can be expressed by the relative positional relationship in the measurement space S.

If the deviation amount between the reference coordinates in the measurement space S and the three-dimensional coordinates for measurement of the inertial sensor 12 is known, even if the golf club 20 deviates from the reference state, It becomes possible to calibrate the measurement result.

3 is a block diagram showing the configuration of the inertial sensor 12. As shown in Fig.

The inertial sensor 12 includes a three-axis acceleration sensor 128, a three-axis gyro sensor 130, a processing unit 132, a wireless communication unit 134 And the like.

The three-axis acceleration sensor 128 measures the acceleration in the direction of each axis (X1, X2, X3) of the three-dimensional rectangular coordinate at the measurement point (O).

The three-axis gyro sensor 130 measures the angular acceleration around each axis (X1, X2, X3) of the three-dimensional rectangular coordinate at the measurement point (O).

The wireless communication unit 134 transmits measurement data of the three-axis acceleration sensor 128 and the three-axis gyro sensor 130 to the computer 14.

The processing section 132 performs activation of the inertial sensor 12, assignment of a time stamp to measurement data, control of transmission of measurement data, and the like.

In the present embodiment, the processing section 132 is constituted by a microcomputer.

The processing section 132 includes a CPU 132A and a ROM 132B, a RAM 132C, an interface 132D, and a display driver 132E, which are connected via an interface circuit and a bus line .

The ROM 132B stores a control program for calculating the moving direction and the moving speed of the moving object executed by the CPU 132A, and the RAM 132C provides a working area.

The interface 132D inputs measurement values of the three-axis acceleration sensor 128 and the three-axis gyro sensor 130 and supplies the measured values to the CPU 132A. The interface 132D receives an operation signal from the operation button 126, (132A).

The display driver 132E drives the display unit 124 under the control of the CPU 132A.

Next, the configuration of the computer 14 will be described.

Fig. 4 is a block diagram showing the configuration of the computer 14. Fig.

The computer 14 calculates the behavior of the golf club 20 in the measurement space S based on the measurement result of the inertial sensor 12 and calculates the evaluation index of the swing.

The computer 14 includes a CPU 1402, a ROM 1404, a RAM 1406, a hard disk device 1408, a disk device 1410, a keyboard 1412 A mouse 1414, a display 1416, a printer 1418, an input / output interface 1420, a wireless communication unit 1422, and the like.

The ROM 1404 stores a control program and the like, and the RAM 1406 provides a working area.

The hard disk device 1408 calculates the behavior of the golf club 20 in the measurement space S based on the measurement result of the inertial sensor 12 and calculates the motion of the swing And an evaluation index calculation program for calculating an evaluation index of the evaluation index. Further, the hard disk drive 1408 stores a three-dimensional shape model reproducing the golf club 20 in a three-dimensional coordinate system.

Here, a calculation method of the evaluation index in the evaluation index calculation program will be described.

As described above, the inertial sensor 12 is mounted on the golf club 20, but the shape of the golf club 20 is known, and is almost constant (the warping at the time of striking can be neglected) The relative position between the arbitrary point and the measurement point of the golf club 20 can be specified by fixing the measurement point of the inertia sensor 12. [ The evaluation index calculation program calculates the position of each point of the golf club 20 at each time based on the measurement result of the inertia sensor 12 and stores the behavior of the golf club 20 during the swing in the RAM 1406 ) On the virtual space on the screen. Then, various evaluation indices in the swing are calculated.

In the present embodiment, for example, the following evaluation indexes are calculated in the evaluation index calculation program.

(1) Moving locus data as time-series data representing a moving locus of the golf club 20:

The movement locus data is shown by the movement locus of the shaft 22 of the golf club 20 (FIG. 17) or the locus of the center point of the face surface of the golf club 20 (FIG. 5).

17A is a moving locus viewed from the front side of the measurer F, and Fig. 17B is a moving locus viewed from the side of the measuring finger F which is well-used.

(2) Head speed data based on moving locus data:

The head speed during swing is calculated based on the distance that the center point 410 (Fig. 5) of the face surface of the golf club 20 moves per unit time.

(3) Left and right approach angle (θ _LR ):

The left and right entry angles θ _LR are obtained by projecting the movement locus T of the center point 410 of the face surface 402 of the golf club 20 and the target line L on a horizontal plane as shown in FIG. Refers to the angle formed by the movement locus T and the target line L on the horizontal plane. Incidentally, in the figure, the arrow F shows the moving direction of the golf club head 24. [

(4) Upward and _downward entering angle ([theta] _UD ):

As shown in Fig. 7, the upper and lower entry angles [Theta] _UD are obtained by moving the movement locus T and the target line L of the center point 410 of the face surface 402 of the golf club 20 to the target line L Refers to the angle formed by the movement locus T and the target line L on the vertical plane when projected onto the vertical plane parallel to the horizontal plane.

(5) Direction data Df indicating the direction of the golf club head 24 immediately before the face surface 402 hits the golf ball B:

In the present embodiment, the direction data Df includes a face angle phi during a hitting, a loft angle alpha during a hitting, and a lie angle beta during hitting.

This will be described below with reference to Figs. 8, 9, and 10. Fig.

8, the face angle 402 at the time of striking is set so that the face surface 402 of the golf club 20 faces the face surface 402 immediately before striking the golf ball B (5-1) (H) and the target line L on the horizontal plane when the normal line H passing through the center point 410 of the target line L and the target line L are projected on the horizontal plane .

(5-2) The hit angle of the loft (alpha) is set such that the face surface 402 of the golf club 20 faces the face surface 402 immediately before striking the golf ball B, as shown in Fig. 9 And a plane parallel to the horizontal plane (plane G) intersecting the normal line H and the plane H parallel to the normal line H passing through the center point 410 of the plane H (FIG.

10, the face angle 402 of the golf club 20 corresponds to the angle of the shaft 22 immediately before striking the golf ball B, An extension line, and an angle formed by a horizontal plane (in this example, the ground surface G) where the extension line intersects.

In addition, the above-described swing evaluation index is merely an example, and it is needless to say that only a part of the evaluation indexes described above may be calculated, or evaluation indexes other than the evaluation indexes described above may be calculated.

Returning to the description of FIG. 4, the disk device 1410 records and / or reproduces data to / from a recording medium such as a CD or a DVD.

The keyboard 1412 and the mouse 1414 accept an operation input by an operator.

The display 1416 displays and outputs data such as the evaluation index, for example, and the printer 1418 prints out the data, and outputs the data by the display 1416 and the printer 1418.

The input / output interface 1420 is for exchanging data with an external device.

The wireless communication unit 1422 transmits data (measurement data and the like) using wireless communication with the inertial sensor 12. [

In the present embodiment, the computer 14 is used as an apparatus for calculating the evaluation index of the swing based on the measurement result of the inertial sensor 12, but it is not limited thereto. For example, by a small information processing apparatus such as a smart phone or a tablet The evaluation index may be calculated. Further, for example, the inertia sensor 12 may be provided with a function of calculating an evaluation index. In this case, the calculated evaluation index may be displayed on the display unit 124 of the inertial sensor 12, and the calculated evaluation index may be transmitted to another information processing apparatus to output display or the like.

Next, the swing measuring method of this embodiment will be described with reference to the flowchart of Fig.

11 is a flowchart showing a procedure of the swing measuring method of the present embodiment.

First, the measurer F mounts the inertial sensor 12 on the golf club 20 (step S10). The mounting position of the inertial sensor 12 is arbitrary, but is preferably a position that does not disturb the swing by the measurer (F). In the example of Fig. 2B, it is mounted near the boundary between the grip 26 and the shaft 22. Fig.

Next, the measurer F inputs the mounting position information of the inertial sensor 12 (step S12). The mounting position information is a distance between the reference point of the inertial sensor 12 after mounting (for example, the center point of the case 122 in the upper and lower and left and right directions) and the end of the grip 26, , A loft angle and a lie angle.

Subsequently, the measurer (F) adjusts the address posture so that the golf club 20 is in the reference state (step S14). That is, the adjustment step of adjusting the posture of the golf club 20 as the hit area to the reference state is performed.

In the adjustment step of step S14, the direction of the first axis X1 when the golf club 20 is held in the reference state is visibly displayed by the adjustment assist means 16 (see Fig. 1) The posture of the golf club 20 is adjusted so that the mark and the axis (shaft 22) are aligned with each other.

Here, the details of the adjustment assist means 16 will be described.

As a concrete mode of the adjustment assist means 16, the following aspects can be mentioned.

(1) Method of using a light source

As shown in Fig. 1, the light emission means 162 is used as the adjustment assist means 16. Fig. The light emitting means 162 is a laser or an LED, and is a device capable of irradiating the linear light N1 in an arbitrary direction. Incidentally, the line-shaped light may be continuous (linear) or discontinuous (dotted line) in the irradiation region.

The light beam N1 on the line is displayed in the direction of the first axis X1 by the light emitting means 162 so that the axis of the golf club 20 (the shaft 22) N1 to adjust the posture of the golf club 20.

(2) How to use a mirror

As shown in Figs. 13 and 14, a mirror 164 is used as the adjustment assist means 16. Fig. A mark M on the line is attached to the mirror 164 in the direction of the first axis. This mirror 164 is installed at a position opposite to the swing position (ball mount position P0) of the golf club 20 and the axis (shaft 22) of the golf club 20 reflected by the mirror 164 The posture of the golf club 20 is adjusted by fitting the mark M to the posture.

(3) How to use the camera

The camera 166 and the display screen 168 are used as the adjustment assist means 16, as shown in Figs. The camera 166 is provided with an axis line (shaft 22) when the golf club 20 is placed at the reference position, that is, a projection line N2 that projects the first axis X1 onto the ground, As shown in FIG. The image of the vicinity of the swing position (ball placement position P0) of the golf club 20 is photographed using the camera 166 and the photographed image is displayed on the display screen 168 together with the direction of the time axis N3 do. Then, the posture of the golf club 20 is adjusted by aligning the axis (shaft 22) of the golf club 20 in the image with the axis N3.

At this time, as shown in Fig. 15, the posture of the golf club 20 may be adjusted while the observer F views the image displayed on the display screen 168. As shown in Fig. 16, F may instruct the measurer F while watching a display screen not shown by a third party to adjust the posture of the golf club 20. In addition, the display 1416 of the computer 14 may be used as the display screen 168.

In the case where the projection line N2 and the time axis N3 of the camera 166 are not parallel and the amount of displacement between the projection line N2 and the time axis N3 is known, The display position may be shifted and displayed on the display screen 168. [

(4) How to use a jig

It is also possible to provide a stand-type jig 170 capable of holding the golf club 20 in the reference state around the ball mount position P0 as the adjustment assist means 16 as shown in Fig. 19, Do. 19A is a side view of the jig 170, and Fig. 19B is a front view of the jig 170. Fig. The jig 170 is formed so that the shaft 22 of the golf club 20 coincides with the shaft direction (first axis direction) when the golf club 20 is held in the reference state. The golf club 20 can be placed in the reference state by standing upright on the jig 170 with the golf club 20 leaning against it.

The jig 170 includes a base 1702, a frame 1704, a support portion 1706, and a positioning plate 1708 as shown in Fig.

The base 1702 is placed on the paper surface G. [

The frame 1704 is erected from the base 1702.

The support portion 1706 is provided on the frame 1704 and is capable of attaching and detaching the shaft 22 of the golf club 20 and also adjustably supports the position and the direction of the golf club 20 . As the support portion 1706, various conventionally known structures can be used.

The positioning plate 1708 is a spherical plate and is attached on the base 1702 through a spacer 1710 so as to extend on a horizontal plane. The positioning plate 1708 is formed so as to extend in a straight line so that an edge portion 1708A having an acute angle in section is parallel to the paper surface G at one side thereof.

By positioning the golf club head 24 in position with the positioning plate 1708 while the shaft 22 of the golf club 20 is standing on the support portion 1706 of the jig 170, Can be positioned in the reference state.

11, when the adjustment of the address posture is completed such that the golf club 20 is in the reference state, the measurer F turns the operation button 126 of the inertial sensor 12 on (Step S16). That is, the operation button 126 is a signal generating means for outputting a trigger signal indicating that adjustment of the posture of the golf club 20 is completed. The inertial sensor 12 receives the trigger signal and measures the acceleration .

The measurer (F) starts swinging after turning on the operation button (126). The inertia sensor 12 performs an acceleration measurement process for measuring the acceleration of the golf club 20 during the swing (step S18). In the acceleration measuring step, the magnitude and direction of the acceleration applied to the inertial sensor are acquired in a time series. The obtained measurement data is transmitted to the computer 14 using wireless communication.

Subsequently, in the computer 14, based on the time series data of the acceleration measured by the inertia sensor 12 and the three-dimensional shape model of the golf club 20 by the swing evaluation index program, And generates behavior data indicating the behavior (step S20).

That is, the swing evaluation index program generates the behavior data by moving the three-dimensional shape model on the virtual space based on the time series data of the acceleration.

Then, the computer 14 calculates the evaluation index of the swing based on the behavior data (step S22), outputs the calculated evaluation index to the display 1416 or the like (step S24) do.

As described above, in the swing measuring apparatus 10 according to the embodiment, the direction of the first axis X1 when the golf club 20 is held in the reference state by the adjustment assist means 16 is confirmed And the orientation of the golf club 20 is adjusted so as to align the axis of the golf club 20 with the axis of the golf club 20 (the shaft 22).

Thereby, the direction of the three-dimensional rectangular coordinate set in the inertial sensor 12 can be made constant with respect to the measurement space S, and the degree of calculation of the evaluation index can be improved.

Particularly, since the reference state is set such that the lie angle of the golf club 20 and the loft angle of the golf club 20 are catalog values, the head of the golf club is placed on the ground, so that swing can be performed in a generally preferable address state, .

In the swing measuring apparatus 10, as the adjustment assist means 16, light emitting means 162 capable of emitting linear light, or a mirror having a linear mark M in the direction of the first axis X1, The posture of the golf club 20 can be adjusted with a simple configuration.

In the swing measuring apparatus 10, as the adjustment assist means 16, the camera 166 and the display screen 168, which are arranged with the time axis N3 aligned with the first axis X1, 20, the measurer can confirm the swing postures other than the golf club 20 on the display screen 168, and the swing quality can be improved. Further, an instruction of the adjustment direction by the third person can be performed using the photographed image.

Since the swing measuring device 10 starts to measure the acceleration by inputting a trigger signal indicating that the adjustment of the attitude of the golf club 20 is completed, that is, by depressing (pushing down) the operation button 126, The measurement starting point (reference position) in the inertial sensor 12 can be clarified.

In this embodiment, the golf club 20 is used as the hitting section. However, the present invention is applicable to various hitting sections having a shaft shape, such as a baseball bat, a tennis racket, and a hockey stick.

10 ... ... Swing measuring device, 12 ... ... Inertial sensor, 122 ... ... Case, 124 ... ... Display section, 126 ... ... Operation button, 14 ... ... Computer, 16 ... ... Adjusting auxiliary means 162, ... Emitting means, 164 ... ... Mirror, 166 ... ... Camera, 168 ... ... Display screen, 20 ... ... Golf club, 22 ... ... Shaft, 24 ... ... Golf club head, 26 ... ... Grip, 402 ... ... If the face, 410 ... ... node.

Claims (14)

A swing measuring method for measuring an index of a swing of a striking tool using an inertial sensor,
Wherein the inertia sensor measures the acceleration and the angular velocity of the hit ball using the origin of the three-dimensional rectangular coordinate as a measurement point, and measures the first axis of the three-dimensional Cartesian coordinates in the direction of the axis of the hit ball, And a plurality of the striking members are mounted on the striking members in such a manner that they are aligned in parallel with the striking surfaces of the striking members,
The hitting spheres are formed in such a manner that the second axis of the three-dimensional rectangular coordinates is aligned in a direction parallel to the projection line (projection line) to the ground surface of the straight line connecting the center of the impacted object and the target hitting direction of the impact hole Is set as a reference state,
An adjusting step of adjusting the attitude of the impact hole to the reference state,
An acceleration measuring step of measuring an acceleration of the impact hole during the swing;
And a calculation step of calculating the evaluation index using the measured acceleration,
Wherein the adjusting step displays the direction of the first shaft when the impact hole is held in the reference state so that the orientation of the impact hole is matched with the axis of the display, Adjustment,
In the acceleration measuring step, the swing is performed from the posture adjusted by the adjusting step,
Wherein the adjustment step includes the step of setting the jig such that the direction of the shaft of the impact ball matches the direction of the first axis when the impact ball is held in the reference state and the impact ball is raised upright on the jig, Adjust the posture
Wherein the swing measuring method comprises the steps of: delete delete delete The method according to claim 1,
In the acceleration measuring step, a trigger signal indicating that the adjustment of the posture of the hit ball is completed is started and the measurement of the acceleration is started
Wherein the swing measuring method comprises the steps of: 6. The method according to claim 1 or 5,
The hitting part is a golf club
Wherein the swing measuring method comprises the steps of: A swing measuring device for measuring an evaluation index of swing of a batting ball using an inertial sensor,
Wherein the inertia sensor measures the acceleration and the angular velocity of the hit ball using the origin of the three-dimensional rectangular coordinate as a measurement point, and measures the first axis of the three-dimensional Cartesian coordinate in the axial direction of the hit ball, Respectively, in a direction parallel to the face,
Wherein the striking mouth is a standard state in which the second axis of the three-dimensional rectangular coordinate is aligned in a direction parallel to the projection line to the ground surface of the straight line connecting the center of the impacted object and the target striking direction of the striking mouth,
An adjusting auxiliary means for performing an assist in adjusting the attitude of the impact hole to the reference state,
And a calculation unit that calculates the evaluation index using the acceleration of the hit ball during the swing measured using the inertial sensor,
Wherein the adjustment assist means visually displays the direction of the first axis when the hitting hits are held in the reference state and makes the meter (F) match the display with the axis, Assisted adjustment,
Wherein the inertia sensor performs the acceleration measurement from the adjusted posture using the adjustment assist means,
Wherein the adjustment assist means is a jig provided so that the direction of the shaft of the impact hole matches with the direction of the first axis when the impact hole is viewed in the reference state and is set up by leaning the impact hole on the jig, To adjust
Wherein the swing measuring device is a swing measuring device. delete delete delete 8. The method of claim 7,
And signal generating means for outputting a trigger signal indicating that the adjustment of the posture of the hit ball is completed,
The inertial sensor receives the trigger signal and starts measurement of the acceleration
Wherein the swing measuring device is a swing measuring device. The method according to claim 7 or 11,
The hitting part is a golf club
Wherein the swing measuring device is a swing measuring device.
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