JPH0724100A - Instrument for practice of hitting motion of ball - Google Patents

Abstract

PURPOSE:To enable to accurately evaluate timing of hitting ball in ball hitting motion by organizing a controlling means to display result of evaluation on timing of hitting ball evaluated by measured results obtained by a load measuring means and detected result at the equivalent time of hitting ball. CONSTITUTION:An instrument for practice of hitting motion of ball comprises a platform for swing 1 bearing a subject who holds club C and swings it, a measuring means M which measures load of a whole body or of foot at the side of follow swing, a detecting 21 which detects the equivalent time of hitting ball in ball hitting motion, and a controlling means R which directs a displaying means 4 to display information on swing, which is obtained based on the measured result of the load measuring means M and the detected result of the detecting means 21. Then, time controlling means R evaluates timing of hitting ball based on the measured result of the load measuring means M and the detected result of the detecting means 21 and directs the display means 4 to display the result of evaluation as information on swing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing table on which a subject who swings while holding a club is placed, a load measuring means for measuring a load corresponding to the whole body of the subject or a foot on the follow swing side, and in a ball striking operation. A ball striking operation provided with a detection unit that detects a time point equivalent to a ball hit, and a control unit that obtains swing information based on the measurement result of the load measurement unit and the detection result of the detection unit and displays the swing information on the display unit. Training machine.

[0002]

2. Description of the Related Art Such a ball hitting practice machine is used for practicing ball hitting motions such as golf and batting. It is known that in the practice of these ball hitting movements, whether or not the center of gravity moves correctly with the ball hitting movement is an important index for forming a correct ball hitting form. Therefore, in such a ball-hit action training machine, conventionally, the load corresponding to the entire body of the subject or each of the left and right feet during the ball-hit motion and the time corresponding to the ball hit during the ball-hit motion are measured, and the measurement result is displayed as swing information. Was displayed. That is, as the swing information, the time change of the load corresponding to the entire body of the subject or each of the left and right feet during the hitting motion and the hitting ball equivalent time point in the time change of the load are displayed on the display means, for example, as shown in FIG. It was displayed. Note that FIG. 12 shows the time change of the load on the entire body of the subject during the ball hitting motion.
e indicates the time point corresponding to the hit ball in the time change of the load.

[0003]

In practicing the ball-hit action, it is necessary to judge whether the ball-hit timing is proper or not. However, in the conventional ball-hit action training machine described above, the subject (or The instructor has empirically determined whether or not the hitting ball timing is good by looking at the position at the time when the hitting ball corresponds to the time change of the load corresponding to the entire body of the subject or the left and right feet displayed on the display means. Therefore, there is a problem that the judgment criteria are ambiguous and accurate evaluation cannot be performed. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ball hitting practice machine capable of accurately evaluating the ball hitting timing in a ball hitting motion.

[0004]

SUMMARY OF THE INVENTION A ball hitting practice machine of the present invention is a swing table on which a subject who holds a club and swings is placed, and a load for measuring the load corresponding to the entire body of the subject or the foot on the follow swing side. Measuring means, detecting means for detecting a time point equivalent to a hitting ball in hitting motion, swing information is obtained based on the measurement result of the load measuring means and the detection result of the detecting means, and a control means for displaying the swing information on the display means. In the first characteristic configuration, the control means evaluates the hitting ball timing based on the measurement result of the load measuring means and the detection result of the detecting means, and the evaluation result is The swing information is configured to be displayed on the display means. In a second characteristic configuration according to the first characteristic configuration, the control means controls the load value at the maximum load point with respect to the difference between the load value at the maximum load point during the ball hitting motion and the load value corresponding to the weight value of the subject. The evaluation value of the hitting timing is obtained based on the ratio of the difference between the load value and the load value at the time of hitting the ball, and the evaluation value is displayed on the display means. In a third characteristic configuration according to the first characteristic configuration, the control means is based on the position of the hitting ball equivalent time point between the maximum load time point during the ball hitting operation and the minimum load time point thereafter.
The point is that the evaluation value of the hitting timing is obtained and the evaluation value is displayed on the display means.

[0005]

According to the first characteristic configuration of the present invention, a change in the load corresponding to the whole body of the subject or the foot on the follow swing side in the ball hitting action is measured, and the time point corresponding to the ball hitting in the load change is detected. . Then, the hitting timing in the hitting operation is evaluated based on the measurement result and the detection result, and the evaluation result is displayed on the display means.
According to the second characteristic configuration, as the evaluation value of the hitting ball timing in the first characteristic configuration, the difference between the load value at the maximum load point during the ball hitting action and the load value corresponding to the weight value of the subject is calculated at the maximum load point. The ratio of the difference between the load value and the load value at the time of hitting the ball is calculated, and the ratio is displayed on the display means. According to the third characteristic configuration, as the evaluation value of the hitting ball timing in the first characteristic configuration, the position of the hitting ball equivalent time point between the maximum load time point during the ball hitting operation and the minimum load time point after that time point (for example, the maximum load value). (The ratio of the time from the maximum load to the time equivalent to the hit ball to the time from the time to the minimum load)
Is detected, and the detected value is displayed on the display means.

[0006]

EFFECTS OF THE INVENTION In general, ball hitting motions include backswing,
It consists of a downswing and a follow swing, and while weight-shifting to the foot on the backswing side in the backswing, twist the body to the backswing side to reach the top position, and downswing from the top position to the foot on the followswing side. While weight-shifting, the club swings down and hits the ball while returning to the body twist, and then swings the club up while swinging the body to the follow swing side for a follow swing. Therefore, when the swing data of a large number of skilled persons was analyzed regarding the relationship between the time equivalent to the hitting ball and the time change of the load in the downswing, the load corresponding to the entire body in the hitting motion or the foot on the follow swing side becomes the maximum load. There is a ball hitting time point between the maximum time point and the load minimum time point after that time point, and the time point is equivalent to the load minimum time point when the hit ball point time point becomes the load value corresponding to the weight value of the subject. It was found that the closer to the side, the more advanced. In other words, in the ball striking action, it is necessary for the body (time from the maximum load point to the point equivalent to the ball hitting) before striking the ball after striking the foot.
The higher the number, the higher the level is. Therefore, the load value at the time of hitting the ball in the load change from the maximum load time point to the minimum load time point after the load value corresponding to the subject weight value is reached, or the maximum load time point is equivalent to the subject weight value. It is possible to evaluate the hitting ball timing by looking at the position of the hitting ball equivalent time point in the elapsed time from the time point at which the load value is shown to the load minimum time point. Therefore, according to the first, second, and third characteristic configurations, the hitting timing in the hitting operation is evaluated, and the evaluation result is displayed on the display means, so that the hitting timing can be accurately evaluated. We came to offer training machine.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a golf training machine to which the present invention is applied will be described below with reference to the drawings. 1 to 3,
1 is a swing table, 2 is a ball mounting table, 3 is a processing device, and 4 is a display device. During the swing, the golf training machine of the present embodiment processes the detection data of the load detection sensor D provided on the swing base 1 by the processing device 3 to display the load center on the display device in real time, and The load center is temporarily stored as time series data, the swing of the subject is determined, and the load or load center data is displayed together with the determination result after the swing is completed. Hereinafter, each device will be described.

The swing base 1 comprises two load detection bases 10 and 11 corresponding to the left and right feet respectively.
Is the four load cells 12, 1 as the load detection sensor D
The four corners are supported by 3, 14, and 15, and the load detection base 11 is supported by the four load cells 16, 17, 18, and 19 as the load detection sensor D at the four corners. On the swing table 1, the subject holding the club C swings. At this time, the load applied to the swing base 1 is the eight load cells 12, 13, 14, 15, 16, 17, 18, 1 supporting the two load detection bases 10, 11.
The load and the load center of the subject and the load centers corresponding to the left and right feet of the subject are obtained from these outputs as will be described later.

A support tool 25 for mounting the ball 24 when performing a swing practice with a wood club or the like is mounted on the ball mounting table 2, and the swing tool 1 side of the support tool 25 has an iron club or the like. A marker 70 indicating the position where the ball is directly placed on the ball placing table 2 when the swing is practiced is drawn. Then, the presence or absence of the ball 24 is detected on both sides of the support tool 25 and the marker 70 sandwiching the club head passage, and the ball 24 is detected by the support tool 2.
5 functions as a reset switch when a new swing is started when placed on the marker 70 or the marker 70, and the ball 24 on the support 25 or the marker 70 is hit by the club C and on the support 25. A ball detection sensor 21 is provided to detect the time when the ball disappears as a time corresponding to a hit ball, which is one of the characteristic points in the golf swing, that is, an impact point. A club detection sensor 22 for detecting the movement of the club C to the backswing side is provided on both sides of the support tool 25 and the marker 70 on both sides of the club head passage on the backswing side. Therefore, the ball detection sensor 21
It functions as a detecting means for detecting a time point equivalent to a hit ball.

Sphere detection sensor 21 and club detection sensor 2
Each of 2 is composed of a transmissive optical sensor. As for the arrangement of these sensors, the light emitting portion 21a of the ball detection sensor 21 and the light emitting portion 22a of the club detection sensor 22 are installed on the side of the club head passage opposite to the swing base 1, and the club heads of these light emitting portions 21a, 22a are arranged. A light receiving portion 21b of the ball detection sensor 21 and a light receiving portion 22b of the club detection sensor 22 are installed opposite to each other across the passage, facing the respective light emitting portions 21a, 22a. The detection light emitted from the light emitting portion 21a of the sphere detection sensor 21 is located on the light receiving portion 21 diagonally below.
Although it is projected toward b, this detection light passes through the region where the sphere 24 above the support tool 25 and the marker 70 should exist, and when the sphere 24 is placed on the support tool 25,
Even when the sphere is placed on the marker 70, the presence or absence of the sphere 24 can be similarly detected. The projection path of the detection light of the club detection sensor 22 is set to be substantially parallel to the projection path of the detection light of the sphere detection sensor 21, and even when the sphere 24 is placed on the support tool 25, the marker 70 is used. If you put a ball on top,
The passage of the club can be detected without fail.
The drive circuit for the ball detection sensor 21 and the club detection sensor 22 is built in the control box 26.

The processing device 3 includes a processing device 31 for performing a calculation process for obtaining a load and a load center, a sequence control of the device, a display control of the display device 4, an I / O interface 32 for transferring various data, and a load. And a storage device 33 for storing load center measurement information, an operation console 34 for selecting an operation mode of the device and inputting various comments, an external storage device 35 for storing measurement information and the like. The display device 4 includes a graphic display device 4a and a plotter 4b. The graphic display device 4a displays a movement locus of the load center and the plotter 4b displays a time change of the load.

Next, the process of calculating the load and the load center by the arithmetic unit 31 will be described. The test subject who holds the club C stands in a substantially center position on the swing table 1 while standing with the left and right feet on the two load detection tables 10 and 11, respectively. Taking the load detection table 10 on which the subject places his left foot as an example, the outputs of the load cells 12, 13, 14, 15 at the four corners of the load detection table 10 are adjusted in advance by zero adjustment in the load converter 100. Since the loads are canceled out, the total WL of the outputs W1, W2, W3, W4 becomes the load of the left foot of the subject on the load detection table 10. That is, WL = W1 + W2 + W3 + W4 Furthermore, at this time, since the shared output of each load cell differs depending on the relationship between the position where the load is applied and the installation position of the four load cells 12 to 15, the load applied to the load detection base 10 from these outputs. You can seek the center.

That is, regarding the left-right direction component X and the front-back direction component Y of the load center expressed with the load cell 12 in FIG. 1 as the origin, the four load cells 12 to 15 have the width a in the X direction and the width in the Y direction. In the case of being arranged at the four corners of the rectangular load detection base 10 of b, it can be obtained from X = (W2 + W3) × a / WL Y = (W3 + W4) × b / WL. In addition, the load cells 12, 13,
Even when the arrangements of 14 and 15 are not at the four corners of the rectangle, the load center can be obtained by performing the correction unique to the geometrical arrangement of the load cells. Further, if three or more load cells are provided, the center of load applied to the swing table 1 can be obtained. The load detection base 11 on which the subject places his right foot is also configured the same as the load measuring device 10, and the load center of the load applied to the load detection base 11 can be obtained in the same manner as above. That is, the load centers corresponding to the left and right feet of the subject can be obtained.

As for the load and center of load of both legs of the subject, that is, the whole body, the load applied to the load detection base 11 is W.
If it is R, as in the case of the left foot above, the load cell 16
From the outputs W5 to W8 of ~ 19, WR = W5 + W6 + W7 + W8 The overall load WT is obtained by WT = WL + WR, and the load center is the distance between the load center corresponding to the left foot and the load center corresponding to the right foot of the subject. If it is L, it is located at a position WR × L / WT away from the load center corresponding to the left foot on the line segment connecting the left and right load centers, and this can be calculated.

As shown in FIG. 3, eight load cells 12 ...
Outputs W1 to W4 and W5 to W8 of 15 and 16 to 19
Is a load converter 100 equipped with a measurement bridge circuit and an A / D converter, and after compensating for the weight of the swing table 1 as described above, it is sampled at regular intervals and becomes a digital quantity. Then, it is sequentially loaded into the processing device 3 via the I / O interface 32. The load WT of the subject, the load center, and the load centers corresponding to the left and right feet are calculated by the arithmetic unit 31 in the processing device 3 according to the above-described formula. Then, the arithmetic unit 31 displays the obtained load centers corresponding to the entire body of the subject and each of the left and right feet on the graphic display device 4a of the display device 4 in real time, and the time series data of the load and the subject The time series data of the load center corresponding to the entire body and each of the left and right feet, that is, the movement trajectory is stored in the storage device 33.

Therefore, the arithmetic unit 31 functions as a load measuring means M for measuring the load corresponding to the whole body of the subject or the foot on the follow swing side, and further, the measurement result of the load measuring means M and the ball detection sensor 21. It functions as a control unit R that obtains swing information such as a load and a load center based on the detection result of (a detection unit that detects a time point equivalent to a hit ball) and displays the swing information on the display device 4.

The time-series data is stored by the sphere detection sensor 21 when the sphere detection sensor 21 detects that the sphere 24 is placed on the support 25 or the marker 70 and resets the device. The data up to the impact point that detects that the ball 24 on 25 or the marker 70 has been hit and has disappeared, the oldest data is sequentially stored in the storage area of the storage device 33 having an appropriate storage capacity. The data is rewritably stored endlessly, and the data after the impact point is stored in another storage area having a storage capacity corresponding to a predetermined time width.

Together with these time series data, the load center corresponding to each of the left and right feet of the subject at the time of addressing, the load center corresponding to the entire body of the subject, the load center corresponding to the entire body at the body turn start point, and the top position The load center corresponding to the whole body at, the load center corresponding to the whole body at the swing-down point, the load center corresponding to the whole body at the impact point, and the load center corresponding to the whole body at the finish point are also stored in the storage device 33. Remembered. Each load center at the time of addressing is obtained by averaging the positions of the load centers before the swing start point detected as described later.

Next, a process in which the club detection sensor 22 and the arithmetic unit 31 detect the swing start point which is one of the characteristic points in the golf swing will be described. In the storage device 33, together with the above-mentioned load and load center data,
Information on whether or not the club detection sensor 22 has detected the passage of the club head is also stored in time series. Based on this stored information, the arithmetic unit 31 excludes the time of about 100 mS immediately before the impact point and sets the time when the first club detection sensor 22 detects the passage of the club head as the swing start point by tracing back the time from the impact point. To detect.

Next, a process in which the arithmetic unit 31 detects a body turn start point which is one of characteristic points in a golf swing will be described. Of the load and load center data obtained by the computing device 31 as described above and stored in the storage device 33, the time change of the load on the lower leg of the subject in the backswing direction shown in FIG. 6, that is, the present embodiment. Since the device configuration for a right-handed test subject is illustrated by way of example, when the load of the right foot changes with time, the search starts from the data corresponding to the swing start point indicated by point A in FIG. The position of B on the time axis is detected as the body turn start point.

Next, the process in which the arithmetic unit 31 detects the top position which is one of the characteristic points in the golf swing will be described. The component in the left-right direction, that is, the X direction, of the load-series time series data corresponding to the entire body of the subject, which is obtained by the arithmetic unit 31 as described above and stored in the storage device 33, is time-differentiated to obtain the load-center X-value. The time change of the moving speed in the direction is calculated. In the time change of the moving speed in the X direction illustrated in FIG. 7, the point F, which is traced back for a predetermined time from the data of the impact point detected by the sphere detection sensor 21 indicated by the point E in FIG. Point F indicating the reference point
The data is searched backward in the direction from, and the sign of the moving speed in the X direction first reverses from negative to positive, that is, the point G at which the direction of the moving speed in the X direction first reverses is set as the top position. To detect. The time interval from the point E indicating the impact point to the point F, which is the reference time point, is set as a top position because the direction of the moving speed may be in the backswing direction immediately before the impact point. In order to prevent detection, this time interval is preferably about 200 mS.

Next, a process in which the arithmetic unit 31 detects a swing-down point which is one of characteristic points in a golf swing will be described. Of the data obtained by the arithmetic unit 31 as described above and stored in the storage unit 33, the point indicating the top position obtained as described above in the time change 90 of the right foot load and the time change 91 of the left foot load shown in FIG. From H,
Up to a point I indicating the impact point detected by the ball detection sensor 21 corresponds to the downswing. During this downswing, within the time t from the point J, which indicates the time when the load on the left and right feet of the subject becomes equal, to the side where time elapses and t ′ to the side that goes back in time, the foot on the upper hand side in the downswing direction. The rate of change of the load on the right foot, that is, the time differential value is calculated. It is suitable that both the time widths t and t'are about 50 mS. The point K indicating the time point when the absolute value of the change rate of the time change 90 of the right foot load becomes the minimum value is detected as the swing-down point. It should be noted that 0.2 seconds after the impact point detected by the ball detection sensor 21 is detected as a finish point which is one of the characteristic points in the golf swing.

Next, a process in which the arithmetic unit 31 performs a golf swing determination process of the subject will be described. This judgment is composed of a comprehensive evaluation and an individual evaluation of 5 items, which will be sequentially described with reference to FIGS. 4 and 5.

First, in the comprehensive evaluation, the load center 114 at the address point of the locus 111 of the load center corresponding to the whole body of the subject during the golf swing shown in FIG.
The load center 115 at the start point of the body turn, and
This is performed based on the part from the load center 116 at the top point to the load center 117 at the swing-down point. That is, the load center 1 at the above address point
The locus portion from 14 to the load center 117 at the swing-down point is parallel to the first virtual line 120 connecting the load centers 110 of the left and right feet at the address point, and the load center at the swing-down point. If it is in a state of being located between the second virtual straight line 121 passing through 117, or a state close thereto, that is, the auxiliary determination straight line 120 ′ translated in the Y-axis negative direction by Δc from the first virtual straight line 120, 2 If the position is between the virtual straight line 121 and the auxiliary determination straight line 121 ′ that has been translated in the positive direction of the Y-axis by Δd, the swing of the subject is determined to be “good”, and otherwise it is determined to be “bad”. judge. The first virtual straight line 120 and the second virtual straight line 121, and the auxiliary determination straight lines 120 ′, 12
The intervals Δc and Δd with respect to 1 ′ can be set and changed to 0 or more, but the larger the interval, the naturally the determination becomes weaker.

The first individual evaluation is a judgment on the first half of the backswing from the address point to the body turn start point. That is, in the above comprehensive evaluation, it is determined as “good”, and the locus portion from the load center point 114 at the address point to the load center 115 at the body turn start point passes on or near the first virtual straight line 120. If it is in a state, it is determined to be “good” even in this individual evaluation. Then, in all the states other than the above, all are judged as "bad", and even if the comprehensive evaluation is "good", if the condition in the individual evaluation is not satisfied, the judgment is "bad". It should be noted that whether or not the locus portion from the address point to the body turn start point passes on the first virtual straight line 120 or is in a state close to that is determined by the locus portion and the first virtual straight line 12
This is performed based on the magnitude relationship between the total area of the regions sandwiched by 0 and the discriminant value whose setting can be changed. If the total sum of the areas is smaller than the discriminant value, the locus portion is the first virtual straight line 1
It is determined that the vehicle is passing above 20 or is in a state close thereto.

The second individual evaluation is a judgment on the latter half of the backswing from the body turn start point to the top point. That is, in the above comprehensive evaluation, it is determined as “good”, and the load center 116 at the top point is the load center 1 at the body turn start point.
If it is located on the body front side of the subject rather than 15, that is, on the Y axis positive direction side in FIG. 4, it is determined to be “good” in this individual evaluation. Then, in all the states other than the above, all are judged as "bad", and even if the comprehensive evaluation is "good", if the condition in the individual evaluation is not satisfied, the judgment is "bad".

The third individual evaluation is a judgment about the downswing and the follow-through portion from the swing-down point to the end point of the follow-through, that is, the finish point. That is, in the above comprehensive evaluation, it is determined as “good”, and the load center 117 at the swing-down point is determined.
From the load center 118 at the impact point to the load center 119 at the finish point is located between or near the first virtual straight line 120 and the second virtual straight line 121. Also, in this individual evaluation, it is determined as “good”. Then, in all the states other than the above, all are judged as "bad", and even if the comprehensive evaluation is "good", if the condition in the individual evaluation is not satisfied, the judgment is "bad". Also in this individual evaluation, as in the case of the above-mentioned comprehensive evaluation, the first virtual straight line 1 is calculated using the auxiliary determination straight lines 120 ′ and 121 ′.
It is determined whether or not it is located between 20 and the second virtual straight line 121 or in a state close thereto.

The fourth individual evaluation is a judgment on the part of the downswing from the swing-down point to the impact point. That is, in the above comprehensive evaluation, it is determined as “good”, and the center of the load at the point of swinging down the foot on the follow-through side of the subject, that is, in the present example, the subject who is right-handed is illustrated, so the swing-down point of the left leg is shown. From the load center 122 to the load center 123 at the impact point of the left foot moves from the toe to the heel side, that is, in the negative direction of the Y axis in FIG. 4, and the impact from the load center 125 at the swing-down point of the right foot to the impact of the right foot. The locus from the heel to the toe side, that is, Y in FIG.
If it is moving in the positive direction of the axis, it is determined as “good” in this individual evaluation as well. Then, in all the states other than the above, all are judged as "bad", and even if the comprehensive evaluation is "good", if the condition in the individual evaluation is not satisfied, the judgment is "bad".

The fifth individual evaluation is to evaluate the hitting timing, and unlike the first to fourth individual evaluations, the judgment is made independently of the judgment result of the comprehensive evaluation. That is, in the time change 130 of the load on the entire body of the subject shown in FIG. 5, the maximum load time 132 with respect to the difference V ₀ between the load value at the maximum load time 132 during the ball hitting action and the load value corresponding to the weight value of the subject. Of the difference between the load value of _{No. 1} and the load value at the time of hitting the ball 135 (V ₁ / V
₀ ) is obtained, and the value is converted into a 10-point evaluation. However, if the ball hitting time point 135 is on the side of the load minimum time point 134 side from the time point 133 when the load value corresponding to the weight value of the subject is reached,
That is, if (V ₁ / V ₀ ≧ 1), the evaluation is 10 (GO
OD). Therefore, the arithmetic unit 31 is configured to display the value of the 10-step evaluation obtained as described above on the display means 4 as the swing information in the ball hitting motion. In the figure, 131 indicates the top point, 133 indicates the time when the load value of the whole body reaches the load value corresponding to the weight value of the subject after the maximum load time 132, and 134 indicates the minimum load after the maximum load time 132. Indicates the time point. still,
The load value corresponding to the weight value of the subject is obtained by averaging the load values of the entire body of the subject before the swing start point.

Next, the operation of this device in use will be described with reference to the flowchart of FIG. 9 and the display examples of FIGS. 10 to 12. The control of the sequence of the flowchart of FIG. 9, the golf swing determination process, the calculation process, and the like are performed by the calculation device 31. Figure 9
In the flowchart, the power switch (not shown) is turned on to activate the device, and then the operator sets the operation mode of the device from the console 34 (step # 1). There are two operation modes, a reference trajectory display mode and a reference trajectory non-display mode. In the reference trajectory display mode, the movement trajectory of the load center corresponding to the entire body of the subject stored in the storage device 33 as past data is used as reference data and is displayed on the graphic display device 4a together with the display data regarding the new swing. In the reference locus non-display mode, the reference data is not displayed but only the display data regarding a new swing is displayed.

When either one of these two modes is selected to complete the setting of the operation mode, it is determined in step # 2 whether the operation mode is set to the reference locus display mode. If the operation mode is set to the reference trajectory non-display mode, the process proceeds to step # 5 without doing anything, and if the reference trajectory display mode is set, the operator stores the information of the subject stored in the storage device 33. A desired movement locus is selected as the reference locus 40 from the movement loci of the load center corresponding to the entire body (step # 3). When the selection is completed, together with the selected reference locus 40, a reference individual address point 41 indicating the load center corresponding to each of the left and right feet of the subject at the time of the swing of the reference locus 40, the body of the subject at the time of addressing. Reference address point 42 showing the center of load corresponding to the whole,
Reference body turn start point 4 that indicates the center of load corresponding to the entire body of the subject at the start point of the body turn
3, a reference top point 44 indicating the center of load corresponding to the entire body of the subject at the top position, a reference lowering point 45 indicating the center of load corresponding to the entire body of the subject at the swing-down point, and the entire body of the subject at the impact point A reference impact point 46 indicating the corresponding load center and a reference finish point 47 indicating the load center corresponding to the entire body of the subject at the finish point.
Is displayed on the graphic display device 4a (step #
4), go to step # 5.

In step # 5, the ball detection sensor 21
It is determined whether or not the sphere 24 is placed on the support tool 25 or the marker 70 based on the detection information of 1., and if the sphere 24 is not on the support tool 25 or the marker 70, the load corresponding to the entire body is obtained. The center of load and the center of load corresponding to each of the left and right feet are displayed in real time, and the process returns to step # 5.
That is, the detection data of the load detection sensor D is fetched (step # 15), and as shown in the display example of FIG. 10, arithmetic processing is performed to determine the load center corresponding to the whole body and the load center corresponding to each of the left and right feet. (Step # 16),
Left and right foot load center points 50 and whole body load center points 51
Respectively displayed on the graphic display device 4a as
The ratio of the load of each of the left and right feet to the total load (that is, WL / WT and WR / WT) is obtained, and the higher the ratio value in the display columns 52 provided at the left and right ends of the display screen of the graphic display device 4a, the higher the ratio. Is displayed as a percentage display point 53 (step # 17). Note that the display example of FIG. 10 illustrates the case where the reference trajectory display mode is selected in step # 1. After performing this screen control, it is determined whether or not the mode change switch of the console 34 has been pressed (step # 18), and if it has been pressed, step # 1.
Then, the operation mode can be set, and if not pressed, the process returns to step # 5.

In step # 5, the ball 24 is moved to the support 2
5 is placed on the marker 70 or the marker 70, the device is in a reset state, load data of a new swing is collected, the data is calculated, and the load center and the left and right feet corresponding to the whole body are collected. The collected data is stored in the storage device 3 while the load center etc. corresponding to each is displayed in real time.
Remember in 3. That is, the stored data such as the reference trajectory and the display on the graphic display device 4a are left as they are, and the stored data corresponding to the previous swing and the display on the graphic display device 4a are cleared (step # 6). Then, the detection data of the load detection sensor D is taken in (step # 7), and the load and the load center of the whole body, the load center corresponding to each of the left and right feet, and the ratio of the load of each of the left and right feet to the total load. Is calculated and stored in the storage device 33, and the calculation result is displayed on the graphic display device 4a as the load center point 50 of the left and right feet, the load center point 51 of the whole body, and the ratio display point 53 (step # 8 and # 9).

After this screen control, it is judged whether or not the swing has already ended by whether or not a predetermined time has passed from the impact point (step # 10), and if the predetermined time has not passed, step # Return to position 7. When it is determined that the swing has already ended after a lapse of a predetermined time from the impact point, the quality of the swing of the subject is determined (step # 11). After the determination process is completed, as shown in FIG. 11, the movement locus 55 of the load center of the whole body, the movement loci 56 and 57 of the load centers corresponding to the left and right feet, and the address time at the time of the completed swing. The individual address points 58 indicating the load centers corresponding to the left and right feet of the test subject in the are identified by the characteristic points 59a to 59f of the address, start of body turn, top, swing down, impact, and finish.
At the same time, it is displayed on the graphic display device 4a.

At the upper end of the display screen of the graphic display device 4a, an address left foot load ratio indicating the ratio of the left foot load to the total load at the address, a top right foot load ratio indicating the ratio of the right foot load to the total load at the top position, as well as,
The impact left foot load ratio indicating the ratio of the left foot load to the total load at the impact point is displayed, and the determination result of the above determination process is displayed on the lower end portion of the display screen of the graphic display device 4a, and the overall evaluation is “total swing determination”. As the first
For the evaluation of the first half of the backswing from the address point, which is the second individual evaluation, to the start point of the body turn, "backswing (front)" is defined as the second individual evaluation, from the body turn start point to the top point. The evaluation of the latter half of the backswing is called "backswing (back)", and the evaluation from the third point of the swing-down point to the end point of the follow-through, that is, the finish point is "downswing + follow-through". As the 4th individual evaluation, "body turn" is used for the evaluation of the downswing portion from the swing-down point to the impact point, and the 5th individual evaluation is "impact timing" for the evaluation of the hitting timing. Are displayed respectively. Similar to FIG. 10, FIG. 11 also shows a display example when the reference trajectory display mode is selected. The display of the percentage display point 53 in the display column 52 is designed to show the state of the impact point.

Further, in the display of the movement locus 55 of the load center of FIG. 11, a straight line connecting the load centers 58 of the left and right feet at the address point corresponding to the first virtual straight line 118 of FIG. A dotted line 60 corresponding to the second virtual straight line 119
Identification display 59 parallel to and corresponding to the swing-down point
A straight line passing through d is displayed along with a dotted line 61. Thereby, the subject or a person instructing the subject can visually evaluate the swing by the same method as the determination process performed by the arithmetic unit 31 as described above.

Then, the data of the time change of the load corresponding to the whole body as shown in FIG. 12 is displayed on the plotter 4b (step # 12). In the display of the time change of the load corresponding to the whole body, swing start, body turn start, top, swing down, impact, and
Identification display at the time corresponding to each feature point of the finish 80
a to 80f are displayed together with operation mode schematic displays 81a to 81f that schematically show the respective states.

Further, in the display of the time change of the load corresponding to the whole body of FIG. 12, a dotted line 82 showing the time point corresponding to the impact point is also displayed. Thereby, the subject or a person instructing the subject can visually evaluate the swing by the same method as the determination process performed by the arithmetic unit 31 as described above.

The graphic display device 4a displays data from the swing start point to the finish point, and the plotter 4b displays data for a predetermined time before and after the impact point. After that, when the measured load and load center data are not saved, the storage device 3 is returned to the position where the presence or absence of the sphere 24 is detected and saved.
After transferring the measurement data to the data storage area 3 (steps # 13 and # 14), the process returns to the position of step # 5.

[Another embodiment] The hit ball timing which is the fifth individual evaluation of the above embodiment
In the evaluation of Longing, the time variation of the load on the whole body of the subject 13
0, the maximum load time 132
Difference V between the load value and the load value corresponding to the weight value of the subject₀To
On the other hand, the load value at the maximum load point 132 and the ball equivalent time point 1
Difference V from the load value of 35₁Ratio of (V₁/ V ₀),
Although the value is corrected to 10-level evaluation, the evaluation method and
The display direction (10-step display), etc. can be changed variously.
it can. For example, to evaluate the timing of a ball being hit
Load value at maximum load point 132 and minimum load point 1
Difference V with the load value of 34₂The maximum load point 132
Difference between the load value of No. and the load value at the point 135₁Percent of
Go (V₁/ V₂), The above
Difference V₂The load value at 135
Difference from load value at small time point 134 (V₂-V₁) Ratio
((V₂-V₁) / V ₂) You may ask for
Yes. In addition, the maximum load point 132 and its
Stroke between time point 134 and load minimum time point 134
Based on the position of the ball-corresponding time 135,
You may make it obtain | require the evaluation value of a group. That is, the maximum load
Time difference t between time point 132 and load minimum time point 134₃Against
Time between maximum load point 132 and ball hitting point 135
Difference t₂Ratio of (t₂/ T₃), Or the time difference t₃To
On the other hand, between the hitting ball equivalent time point 135 and the minimum load point time point 134
Time difference (t₃-T₂) Ratio ((t₃-T₂) / T₃)
You may ask. Furthermore, the maximum load point 1
32 and time point 1 when the load value corresponding to the weight value of the subject is reached
Time difference t with 33₁The maximum load time 132 and hit
Time difference t from the ball equivalent time 135₂Ratio of (t₂/ T₁)
You may ask. As mentioned above, various hit balls
Although the timing evaluation method is described, there are various other methods.
An evaluation method is conceivable.
After the time when the load value corresponding to the weight value is shown, the minimum load time
Load value at the time of hitting ball in the load change up to
Or, the load equivalent to the weight value of the subject from the time of maximum load
Elapsed time from when the value is displayed to when the load is minimum
It is possible to quantitatively evaluate the position at the time of hitting a ball in
Any evaluation method will do. In the above embodiment, the ball hitting target which is the fifth individual evaluation
In the evaluation of imming, the time variation of the load of the whole body of the subject
The follow-up
It may be possible to evaluate by the load change of the foot on the
Yes. In other words, the load change of the foot on the follow swing side
Is the same as the load change of the whole body, as shown at 91 in FIG.
Since it shows the change with time,
Follow up in the same way as the evaluation method
It is possible to evaluate the load change of the foot on the gu side. In the above example, the weight value of the subject is used as the swing start point.
Calculated by averaging the load values of the entire body of previous subjects
However, the operator should enter the weight value of the subject at the console 34.
May be.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a plan view of a golf training machine to which the present invention is applied.

FIG. 2 is a side view of a golf training machine to which the present invention is applied.

FIG. 3 is a block diagram of a golf training machine to which the present invention is applied.

FIG. 4 is an explanatory diagram of an evaluation method according to an example to which the present invention is applied.

FIG. 5 is an explanatory diagram of an evaluation method according to an example to which the present invention is applied.

FIG. 6 is a diagram showing detection of a body turn start point.

FIG. 7 is a diagram showing detection of a top position.

FIG. 8 is a diagram showing detection of a swing-down point.

FIG. 9 is a flowchart according to an embodiment to which the present invention is applied.

FIG. 10 is a display example according to an embodiment of the present invention.

FIG. 11 is a display example according to an embodiment of the present invention.

FIG. 12 is a display example according to an embodiment of the present invention.

[Explanation of reference signs] C club M Load measuring means R Control means 1 Swing platform 21 Detection means 132 Maximum load time 134 Minimum load time 135 Time equivalent to ball hitting

Claims (3)

[Claims] 1. A swing table (1) on which a subject who swings while gripping a club (C) is placed, and load measuring means (M) for measuring a load corresponding to the entire body of the subject or the foot on the follow swing side. Detecting means (21) for detecting a time point (135) corresponding to a hitting ball in hitting motion, and swing information is obtained based on the measurement result of the load measuring means (M) and the detection result of the detecting means (21), and the swing information. And a control means (R) for displaying on the display means (4), wherein the control means (R) is a measurement result of the load measuring means (M) and the detection means ( 21) A hitting ball practice machine configured to evaluate the hitting ball timing based on the detection result and display the evaluation result as the swing information on the display means (4). 2. The load at the maximum load time point (132) with respect to the difference between the load value at the maximum load time point (132) and the load value corresponding to the body weight value of the subject during the ball striking motion. An evaluation value of the hitting timing is obtained based on a ratio of a difference between the value and the load value at the time point corresponding to the hitting ball (135), and the evaluation value is displayed on the display means (4). A ball hitting exercise machine according to Item 1. 3. The control means (R) is based on the position of the hitting ball equivalent time point (135) between the maximum load time point (132) during the ball hitting motion and the minimum load time point (134) after that time. 2. The ball-hit motion training machine according to claim 1, wherein the ball-hit motion training machine is configured to obtain an evaluation value of the ball-hitting timing and display the evaluation value on the display means (4).