JP2740089B2 - Golf swing diagnostic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf swing diagnosis apparatus for diagnosing a golf swing of a subject.

[0002]

2. Description of the Related Art In the practice of golf swing, it is known that whether or not the center of gravity is correctly moved with the swing is an important index for forming a correct hitting ball form. Therefore, in diagnosing a golf swing, conventionally, the movement of the center of gravity during the swing is measured, and the swing of the swing is determined based on the measurement result or by comparing the measurement result with reference data for comparison. You can check the quality. In particular,
When the subject swings on the swing table, the load or the center of the load on the entire body of the subject or on each of the left and right feet is measured, and the measurement result is displayed on the display means. Alternatively, this measurement result is displayed together with a reference locus as reference data for comparison. The subject diagnosed the golf swing by looking at the display of this measurement result or the display of the reference trajectory (for example, see Japanese Patent Application No. 4-222461 proposed by the present applicant).

[0003]

In a golf swing, it is necessary that a time equivalent to a hit ball is an appropriate time during the swing. However, when diagnosing the timing of the hitting ball during the swing motion in the conventional golf swing diagnosis, the hitting hit on the load center trajectory of the subject is seen, or the hitting hit on the reference trajectory is compared. For this reason, the quality was determined, but there was a problem that accurate diagnosis could not be performed because the determination criteria were ambiguous. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a golf swing diagnostic apparatus capable of accurately diagnosing the timing of a hitting ball during a golf swing operation. Is to do.

[0004]

A first feature of the golf swing diagnostic apparatus according to the present invention is that the golf swing diagnostic apparatus includes a golf club and a golf club.
And the subject's body or left and right feet
Load detection sensors to detect the load corresponding to each
A swing table having a load detection information of the swing base
Based on the subject's entire body or each of the left and right feet
Load measuring means for measuring the load and detecting the time equivalent to hitting the ball
Hitting time detecting means, and measuring information of the load measuring means.
Of these, the part corresponding to the subject during the downswing motion
Judgment and based on the measurement information of that part,
A load corresponding to the examiner's entire body or the feet on the follow swing side
The point at which the weight becomes maximum is detected by the hitting point detection means.
Whether it is on the side going back in time from the hit ball equivalent time
Diagnose the subject's golf swing by discriminating
Diagnostic means and a display for displaying the diagnostic results of the diagnostic means
And means are provided . A second characteristic configuration is that the diagnosis unit determines that the load is maximum.
In the process of reaching the local minimum for the first time after
When the load reaches a value corresponding to the weight value of the subject
Determine whether there is a time equivalent to the hitting ball after the point
To diagnose the subject's golf swing
The point is that it is configured . A third characteristic configuration is that the diagnosis means determines a time corresponding to the hit ball.
Is the minimum value only after the maximum load
By determining whether it is near the point in time
Configured to diagnose the subject's golf swing
There to that point.

[0005]

[Action] Generally, a golf swing is a back swing,
It consists of a downswing and a follow swing, twisting the body to the backswing side while shifting the weight to the backswing side foot at the backswing, reaching the top position, and downswing from the top position to the followswing side foot The player swings the ball down while hitting the body while weight-shifting and returning to the original twist, and then performs the follow swing by swinging the club up while twisting the body to the follow swing side. Therefore, when analyzing the swing data of a number of skilled persons regarding the relationship between the hit ball equivalent time point and the time change of the load in the downswing, the time point when the load corresponding to the whole body or the foot on the follow swing side in the swing becomes the maximum. It was found that the player was on the side going back in time from the time corresponding to the hit ball. Moreover,
It was found that the more advanced the player, the greater the time difference between the point at which the load becomes maximum and the point equivalent to the hit ball. The time when the load corresponding to the whole body or the foot on the follow swing side becomes maximum can be considered as the time when the foot is depressed after the top position, but it takes time until the ball is hit after the foot is depressed. Necessary and this time shows for the body. This means that the longer the time indicating this is, the more it is made. Therefore, this indicates that a golf swing is necessary for this purpose, and that a person who has a sufficient level of skill can be advanced. Therefore, according to the first feature configuration of the present invention, the subject swings on the swing table.
And, the load measuring means, the whole body of the subject during the swing or
Measure the load corresponding to each of the left and right feet, and
The row detects the time corresponding to the hit ball. And the diagnostic means is:
Of the measurement information of the load measuring means,
During the operation, the part corresponding to the
Based on the measurement information of
The point at which the load corresponding to the foot on the
The time is greater than the hit ball equivalent time detected by the time point detection means
By determining whether you are on the side of going back
In other words, by determining whether there is
Diagnose the golf swing of the examiner and display the diagnosis result on the display
Displayed in columns. Also, in general, the time change of the load corresponding to the whole body or the foot on the follow swing side in the downswing is attenuated after the load becomes maximum after the top position and goes to a minimum value at a value lower than the weight value of the subject. According to the second characteristic configuration, the diagnostic means determines that the load is
Hitting phase later than the point in time when the value corresponding to the weight value of
By determining whether or not there is a current time, that is,
By determining if there is enough time to
Diagnose the subject's golf swing. According to the third characteristic configuration, the diagnosis unit determines that the load is the maximum at the time corresponding to the hit ball.
Near the point where the minimum value is reached for the first time after
Or not, that is, the time for
By determining whether there is more than enough
Diagnose the golf swing of the rider. By the way, equivalent to a professional hitting ball
The time point can be multiple times near this minimum
It has been found by data collection of professional people.

[0006]

According to the first feature configuration, the display means can be used.
Based on the displayed determination result, it is possible to clearly determine whether or not the hit ball equivalent time during the downswing operation of the subject's swing is at an appropriate time, that is, whether or not there is a hesitation. A golf swing diagnostic apparatus capable of accurately diagnosing the timing of a hit ball during a golf swing operation has been provided. According to the second feature configuration, the determination result displayed on the display means
, It can be determined whether or not there is enough time, and therefore, it is possible to more accurately diagnose the quality of a golf swing at a time equivalent to a hit ball. According to the third feature configuration, the determination result displayed on the display means
, It is possible to determine whether or not there is enough time for it, so that it is possible to more accurately diagnose the quality of the golf swing at the time of hitting the ball.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a golf practice 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. The golf practice machine of the present embodiment processes the detection data of the load detection sensor D provided on the swing table 1 by the processing device 3 during the swing, displays the center of the load on the display device in real time, and displays the load or After temporarily storing the time-series data of the load center, the swing of the subject is determined, and the load or the data of the load center is displayed after the swing together with the determination result. Hereinafter, each device will be described.

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

A support 25 on which a ball 24 is placed when practicing swinging with a wood club or the like is mounted on the ball mounting table 2. On the swing table 1 side of the support 25, an iron club or the like is mounted. A marker 70 indicating a position at which a ball is directly mounted on the ball mounting table 2 during swing practice is drawn. The presence or absence of the ball 24 is detected on both sides of the support 25 and the marker 70 across the club head passage, and the ball 24 is placed in the support 2.
When the ball is placed on the support 5 or the marker 70, it functions as a reset switch when starting a new swing, and the ball 24 on the support 25 or the marker 70 is hit by the club C on the support 25. A ball detection sensor 21 is provided for detecting a point at which the golf ball has disappeared from the golf swing as a hit point corresponding to one of the characteristic points in the golf swing, that is, an impact point. On both sides of the support 25 and the marker 70 across the club head passage on the back swing side, a club detection sensor 22 for detecting the movement of the club C to the back swing side is provided.

The ball detecting sensor 21 and the club detecting sensor 2
Each of the reference numerals 2 includes a transmission type optical sensor. The arrangement of these sensors is such that the light emitting portion 21a of the ball detecting sensor 21 and the light emitting portion 22a of the club detecting sensor 22 are installed on the opposite side of the swing head 1 in the club head passage, and the club head of the light emitting portions 21a, 22a is provided. On the opposite side of the passage, 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 so as to face the respective light emitting portions 21a, 22a. The detection light emitted from the light emitting portion 21a of the ball detection sensor 21 is received by the light
b, the detection light is made to pass through the area where the sphere 24 above the support 25 and the marker 70 should exist, and when the sphere 24 is placed on the support 25,
When a ball is placed on the marker 70, the presence or absence of the ball 24 can be similarly detected. The projection path of the detection light of the club detection sensor 22 is set so as to be substantially parallel to the projection path of the detection light of the sphere detection sensor 21. Even when the sphere 24 is placed on the support 25, the marker 70 When putting a ball on top,
It is possible to reliably detect the passage of the club.
Drive circuits for the ball detection sensor 21 and the club detection sensor 22 are built in the control box 26.

The processing unit 3 includes an arithmetic unit 31 for performing arithmetic processing for obtaining a load and a center of load, a sequence control of the apparatus, an I / O interface 32 for transferring various data, and measuring information of the load and the center of the load. It comprises a storage device 33 for storing, an operation console 34 for selecting an operation mode of the device and inputting various comments, and 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, and the graphic display device 4a displays the movement locus of the center of the load, and the plotter 4b displays the time change of the load.

Next, a process in which the arithmetic unit 31 functioning as the load measuring means M obtains the load and the center of the load will be described. The subject holding the club C takes a stance by standing at the approximate center of the swing table 1 with the left and right feet resting on the two load detection tables 10 and 11, respectively. The load detection table 10 on which the subject places the left foot will be described as an example. The load cells 12, 13, 14, and 14 at the four corners of the load detection table 10 will be described.
For the output of No. 15, the platform load was previously canceled by zero adjustment in the load converter 100, and the total WL of the outputs W 1, W 2, W 3, and W 4 was the total WL of the subject on the load detection table 10. It becomes the load of the left foot. That is, WL = W1 + W2 + W3 + W4 Further, at this time, the position where the load is applied and the four load cells 1
Since the shared output of each load cell differs depending on the relationship with the installation positions 2 to 15, the load center of the load applied to the load detection table 10 can be obtained from these outputs.

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

For the load on both feet of the subject, that is, the entire body and the load center, the load applied to the load detecting
Let R be the load cell 16 as in the case of the left foot.
From the outputs W5 to W8 of ８19, WR = W5 + W6 + W7 + W8 The load WT of the whole body is obtained by WT = WL + WR, and the load center is the distance between the load center corresponding to the subject's left foot and the load center corresponding to the right foot. Assuming that L is on a line segment connecting the left and right load centers, it is located at a position WR × L / WT away from the load center corresponding to the left foot, and this may be calculated.

As shown in FIG. 3, eight load cells 12 to
Outputs W1 to W4 and W5 to W8 of 15 and 16 to 19
Is a load converter 100 having a measurement bridge circuit and an A / D converter. After compensating for the weight of the swing table 1 as described above, the load converter 100 is sampled at regular intervals to obtain a digital value. Then, the data is sequentially taken into the processing device 3 via the I / O interface 32. The load WT, the load center, and the load center corresponding to each of the left and right feet of the subject are obtained by the arithmetic unit 31 in the processing device 3 according to the above-described formula. Then, the determined load centers corresponding to the left and right feet of the subject and the load centers corresponding to the entire body of the subject are displayed in real time on the graphic display device 4a of the display device 4, and further, the time series data of the load, Further, the time series data of the load center corresponding to the whole body of the subject and the right and left feet, that is, the movement trajectory is stored in the storage device 33. The sphere detection sensor 21 stores these time-series data in the support 25.
The ball detection sensor 21 detects that the ball 24 on the support 25 or the marker 70 has been hit and disappeared from the time when the device is reset by detecting that the ball 24 is placed on the marker 70 or on the marker 70. The data up to the impact point is stored endlessly in the storage area of the storage device 33 having an appropriate storage capacity so that the oldest data is sequentially rewritten with the latest data. Is stored in a separate storage area having a storage capacity corresponding to the time width of.

Along with these time series data, a load center corresponding to each of the left and right feet of the subject at the time of addressing, a load center corresponding to the whole body of the subject, a load center corresponding to the whole body at the start point of the body turn, and a top position. The load center corresponding to the whole body at the swingdown point, 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. It is memorized. Each load center at the time of addressing is obtained by averaging the positions of each load center 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 a swing starting point which is one of the characteristic points in the golf swing will be described. In the storage device 33, together with the data of the load and the load center,
Information as to whether or not the club detection sensor 22 has detected passage of the club head is also stored in chronological order. Based on the stored information, the arithmetic unit 31 sets the time when the first club detection sensor 22 detects the passage of the club head retroactively from the impact point, except for the time of about 100 ms immediately before the impact point, as the swing start point. To detect.

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

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

Next, a process in which the arithmetic unit 31 detects a swing-down point which is one of the characteristic points in the golf swing will be described. Among the data obtained by the arithmetic unit 31 and stored in the storage device 33 as described above, 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 the point I indicating the impact point detected by the ball detection sensor 21 corresponds to a downswing. During this downswing, from the point J indicating the point at which the load on the left and right feet of the subject becomes equal, the foot on the upper hand side in the downswing direction within the time t on the side where time passes and the time t 'on the side going back in time. Is obtained, that is, the rate of change of the load on the right foot, that is, the time differential value. It is appropriate that the time widths t and t 'are both about 50 mS. The point K indicating the time when the absolute value of the rate of change of the time change 90 of the right foot load becomes the minimum value is detected as a swing-down point. In addition, 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 the process of determining the golf swing of the subject will be described. This determination is made up of a comprehensive evaluation and five individual evaluations, and will be described sequentially with reference to FIGS.

First, the comprehensive evaluation is performed by, among the movement locus 111 of the load center corresponding to the whole body of the subject during the golf swing shown in FIG.
Load center 115 at the start of the body turn, and
This is performed based on a portion extending to the load center 117 at the swing-down point via the load center 116 at the top point. That is, the load center 114 at the above address point
The locus portion from the swing point to the load center 117 at the swing-down point is the load center 11 of each of the left and right feet at the address point.
0 and a second virtual straight line 121 that is parallel to the first virtual straight line and passes through the load center 117 at the swing-down point, or is in a state close to it, that is, Position between the auxiliary determination straight line 120 ′ translated in the Y-axis negative direction by Δc from the first virtual straight line 120 and the auxiliary determination straight line 121 ′ translated in the Y-axis positive direction by Δd from the second virtual straight line 121. If so, the subject's swing is determined to be “good”; otherwise, it is determined to be “bad”. The first virtual line 120 and the second
The intervals Δc and Δd between the virtual straight line 121 and the auxiliary determination straight lines 120 ′ and 121 ′ can be set and changed at 0 or more.

The first individual evaluation is a judgment on the first half of the backswing from the address point to the start point of the body turn. That is, in the overall evaluation, the determination is “good”, and the load center 1 at the body turn start point is shifted from the load center point 114 at the address point.
If the trajectory portion up to 15 passes or is close to the first virtual straight line 120, it is also determined to be “good” in this individual evaluation. If the condition is other than the above, all are determined to be "bad". Even if the overall evaluation is "good", if the condition in the individual evaluation is not satisfied, the determination is "bad". The trajectory from the address point to the body turn start point is the first
The determination as to whether or not it is passing on or near the virtual straight line 120 is based on the magnitude relationship between the total area of the area sandwiched by the locus portion and the first virtual straight line 120 and the determination value that can be changed. If the sum of the areas is smaller than the discrimination value, the trajectory portion is set to the first virtual straight line 120.
It is determined that the vehicle is passing over or close to the above.

The second individual evaluation is a judgment on the latter half of the backswing from the start point of the body turn to the top point. That is, in the above-mentioned comprehensive evaluation, the judgment was “good”, and the load center 1 at the top point was 1
16 is the load center 115 at the start point of the body turn
If it is located on the anterior side of the subject, that is, on the positive side in the Y-axis direction in FIG. If the condition is other than the above, all are determined to be "bad". Even if the overall evaluation is "good", if the condition in the individual evaluation is not satisfied, the determination is "bad".

The third individual evaluation is a judgment on the part of the down swing and the follow-through from the swing-down point to the end point of the follow-through, that is, the finish point. That is, in the overall evaluation, the judgment is “good”, and the trajectory from the load center 117 at the swing-down point to the load center 119 at the finish point via the load center 118 at the impact point is the first virtual If it is located between the straight line 120 and the second imaginary straight line 121 or in a state close to it, it is also determined to be “good” in this individual evaluation. If the condition is other than the above, all are determined to be "bad". Even if the overall evaluation is "good", if the condition in the individual evaluation is not satisfied, the determination is "bad". Note that, in this individual evaluation, as in the case of the above-described comprehensive evaluation, the first virtual straight line 120
It is determined whether or not it is located between and the second virtual straight line 121 or in a state close to it.

The fourth individual evaluation is a judgment on the downswing portion from the swing-down point to the impact point. That is, in the above-mentioned comprehensive evaluation, it is judged as “good”, and the center of load at the point of swinging down of the foot on the follow-through side of the subject, that is, in the present embodiment, a right-handed subject is illustrated. The path 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, the negative direction of the Y-axis in FIG. 4, and the impact of the right foot from the load center 125 at the swing-down point of the right foot. If the trajectory of the point to the load center 124 moves from the heel to the toe side, that is, the positive direction of the Y-axis in FIG. 4, it is also determined to be “good” in this individual evaluation. If the condition is other than the above, all are determined to be "bad". Even if the overall evaluation is "good", if the condition in the individual evaluation is not satisfied, the determination is "bad".

The fifth individual evaluation is performed from the first to the fourth
Unlike the individual evaluation, the judgment is made independently and independently of the judgment result of the comprehensive evaluation. The subject of the judgment is during the subject's downswing motion (from top to impact)
Is the weight of the whole body. In FIG. 5, 130 indicates the time change of the load of the whole body of the subject, 131 indicates the top point in the time change 130 of the load, and 132 indicates the top point 1
The point at which the load becomes the maximum in the downswing operation after 31 is 133, the point at which the load becomes the subject's weight value in the downswing operation after the maximum point 132, and 134 is the downswing operation after the point 133. Is the point at which the load is minimized for the first time. The judgment in the fifth individual evaluation includes four steps of “poor”, “acceptable”, “good”, and “excellent”. In FIG. 5, the point 132 is a point in time that is earlier than the impact point. , It is determined to be “OK”, and if there is an impact point after point 133, it is determined to be “OK”. Further, the impact point is close to the point 134, that is, the impact point is If it is within the load value obtained by adding the load by Δe, it is determined to be “excellent”; otherwise, it is determined to be “bad”. It should be noted that Δe can be set to 0 or more. However, as the value is larger, the determination of “excellent” is naturally weaker. If the difference between the weight value of the subject and the load value at the point 134 is not more than twice Δe, the determination is “bad”.
It is performed in three stages of "OK" and "OK". Further, the weight value of the subject is obtained by averaging the weight values of the entire body of the subject before the swing start point. Therefore,
The arithmetic unit 31 functions as the diagnosis unit S.

Next, the operation of the apparatus in use will be described with reference to the flowchart of FIG. 9 and the display examples of FIGS. The control of the sequence of the flowchart of FIG. 9, the determination processing of the golf swing, the arithmetic processing, and the like are performed by the arithmetic unit 31. FIG.
In the flowchart of FIG. 5, after the power switch (not shown) is turned on to start the apparatus, the operator sets the operation mode of the apparatus 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 or the like of the load center corresponding to the entire body of the subject stored in the storage device 33 as past data is displayed as reference data on the graphic display device 4a together with display data on a new swing. In the reference trajectory non-display mode, the reference data is not displayed, and only the display data relating to the new swing is displayed.

When one of these two modes is selected and the setting of the operation mode is completed, it is determined in step # 2 whether or not the operation mode is set to the reference trajectory display mode. If the operation mode is set to the reference trajectory non-display mode, the process proceeds to step # 5 without doing anything. If the operation mode is set to the reference trajectory display mode, the operator can check the subject's information stored in the storage device 33. A desired trajectory is selected as a reference trajectory 40 from among the trajectories of the load center corresponding to the entire body (step # 3). When the selection is completed, the selected reference trajectory 40, the reference individual address point 41 indicating the load center corresponding to each of the right and left feet of the subject at the address in the swing of the reference trajectory 40, and the subject's body at the address Reference address point 42 indicating the load center corresponding to the whole,
Reference body turn start point 4 indicating the center of load corresponding to the entire body of the subject at the start of the body turn
3. The reference top point 44 indicating the center of load corresponding to the entire body of the subject at the top position, the reference swing-down 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. Reference impact point 46 indicating the corresponding load center, and 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), proceed to step # 5.

In step # 5, the ball detection sensor 21
It is determined whether or not the ball 24 is placed on the support 25 or the marker 70 based on the detection information. If the ball 24 is not on the support 25 or the marker 70, the load corresponding to the entire body is determined. The center of the load and the center of the load corresponding to each of the right and left 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, and the load centers corresponding to the whole body and the load centers corresponding to the left and right feet, respectively. (Step # 16), and displayed on the graphic display device 4a as the load center point 50 of the left and right feet and the load center point 51 of the whole body, respectively, and further, the ratio of the load of each of the left and right feet to the total load (that is, , WL
/ WT and WR / WT), and the graphic display device 4
In the display fields 52 provided at both left and right ends of the display screen a, a ratio display point 53 is displayed so that the larger the ratio value, the higher the ratio display point 53 (step # 17). Note that the display example of FIG. 10 illustrates a 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). If it has been pressed, the process returns to step # 1 and the operation mode can be set. If not, the process returns to step # 5.

In step # 5, the ball 24 is
5 or on the marker 70, the device is in a reset state, the load data of a new swing is collected, the data is calculated, the load center corresponding to the whole body, and the right and left feet The collected data is stored in the storage device 3 while displaying the corresponding load centers and the like in real time.
Go to 3 That is, the storage data such as the reference locus and the display on the graphic display device 4a are left as they are, and the storage 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 obtained by the arithmetic processing 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 determined whether or not the swing has already been completed based on whether or not a predetermined time has elapsed from the impact point (step # 10). Return to position 7. If it is determined that the swing has already been completed after a predetermined time has elapsed from the impact point, a determination is made as to whether the swing of the subject is good (step # 11). After the end of the determination processing, as shown in FIG. 11, for the completed swing, the movement locus 55 of the load center of the whole body, the movement locus 56, 57 of the load center corresponding to each of the right and left feet, and the address time The individual address points 58 indicating the load centers corresponding to each of the right and left feet of the subject are identified by identification marks 59a to 59f of respective characteristic points of address, body turn start, 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, which indicates 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 processing is displayed at the lower end of the display screen of the graphic display device 4a. As the first
The evaluation of the first half of the backswing from the address point to the start of the body turn, which is the second individual evaluation, is referred to as “backswing (front)”, and the evaluation from the start of the bodyturn, which is the second individual evaluation, to the top point. The second half of the backswing is evaluated as "backswing (after)", and the evaluation from the third individual evaluation, the swing-down point to the end point of follow-through, that is, the finish point, is "downswing + follow-through" The evaluation of the downswing portion from the swing-down point to the impact point, which is the fourth individual evaluation, is referred to as the “body turn”. For the evaluation of the context with the point corresponding to the point, see “Impact Timing Respectively display as. This FIG.
10 also shows a display example when the reference trajectory display mode is selected, as in FIG. The display of the ratio display point 53 in the display column 52 indicates the state of the impact point.

The movement locus 55 of the load center shown in FIG. 11 is indicated by a dotted line 60 connecting the left and right foot load centers 58 at the address point corresponding to the first virtual straight line 118 in FIG. Dotted line 60 corresponding to the second virtual straight line 119
Identification 59 that is parallel to and corresponds to the swing-down point
A straight line passing through d is displayed together with a dotted line 61. Thus, the subject, the person who is instructing the subject, and the like can visually diagnose the swing in the same manner as the determination process performed by the arithmetic device 31 as described above.

Further, data on 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, the start of the swing, the start of the body turn, the top, the swing down, the impact, and the
Identification display 80 at the time corresponding to each feature point of the finish
a to 80f are displayed together with operation state schematic displays 81a to 81f schematically showing the respective states.

Further, in the display of the time change of the load corresponding to the whole body in FIG. 12, a dotted line 82 indicating a time point corresponding to the impact point is also displayed. Thus, the subject, the person who is instructing the subject, and the like can visually diagnose the swing in the same manner as the determination process performed by the arithmetic device 31 as described above.

The display on the graphic display device 4a displays data from the swing start point to the finish point, and the display on the plotter 4b displays data for a predetermined time before and after the impact point. Thereafter, when the measured load and the data of the load center are not stored, the position returns to the position where the presence or absence of the ball 24 is detected.
After transferring the measurement data to the data storage area of No. 3 (steps # 13 and # 14), the process returns to the position of step # 5.

[Another Embodiment] In the above embodiment, four-stage judgment is performed in the fifth individual evaluation, that is, the evaluation of the front-back relationship between the time point of maximum load during the downswing operation and the time point corresponding to the impact point. However, the determination may be made by selecting one or more of the determination methods at each stage. In the above embodiment, in the fifth individual evaluation, which is the evaluation of the anteroposterior relationship between the time point of maximum load during the downswing operation and the time point corresponding to the impact point, the time change of the weight of the whole body during the downswing operation of the subject Although the evaluation is performed in the following manner, the evaluation may be performed based on a change in load on the foot on the follow swing side. That is, the change in the load on the foot on the follow swing side shows the same time change as the change in the load on the entire body, as shown at 91 in FIG. The load change of the foot on the follow swing side can be evaluated in a similar manner. In the above-described embodiment, in the fifth individual evaluation, if the impact point is within the load value obtained by adding the load by Δe from the point 134, it is determined to be “excellent”. If it is within the range that goes back in time, it may be determined to be “excellent”. In the above embodiment, the weight value of the subject is obtained by averaging the weight values of the entire body of the subject before the swing start point. However, the weight value of the subject may be input at the console 34. In the fifth individual evaluation of the above embodiment, in the course of the time change of the load after the top position from the maximum value to the minimum value through the subject's weight value, it is determined which position the impact point is located at, Although the quality of the impact timing in the downswing is determined in four steps, the time difference between the maximum value and the impact point is measured, and the quality of the impact timing in the downswing is determined by the device based on the time difference. Alternatively, the value of the time difference may be displayed as it is, and the subject may determine whether the impact timing is right or wrong by looking at the value. Also, the load ratio or the time ratio of the position of the impact point between the maximum value and the minimum value may be measured, and the apparatus may determine whether the impact timing in the downswing is good or bad at the ratio. The ratio may be displayed as it is, and the subject may determine whether the impact timing is good or bad by looking at the value.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

[Brief description of the drawings]

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

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

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

FIG. 4 is an explanatory diagram of a diagnostic method according to an embodiment to which the present invention is applied.

FIG. 5 is an explanatory diagram of a diagnostic method according to an embodiment 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 of a load center and the like according to the embodiment to which the present invention is applied.

FIG. 11 is a display example of a load center and the like according to the embodiment to which the present invention is applied.

FIG. 12 is a display example of a time change of a load according to the embodiment to which the present invention is applied.

[Description of Signs] 1 swing table 4 display means 21 hitting time detecting means 132 time when load becomes maximum 133 time when load reaches subject's weight value 134 time when load becomes minimum C club D load detection sensor M load measurement Means S Diagnostic means

Claims (3)

(57) [Claims] An object to be swung while gripping a club (C).
Place the examiner on the subject's entire body or on each of the left and right feet
Load detection sensor (D) to detect the corresponding load
And a subject based on load detection information of the swing base (1) provided with the swing base (1)
Load to measure the load corresponding to the entire body or each of the left and right feet
Weight measuring means (M), hitting time detecting means (21) for detecting a time equivalent to a hitting ball, and the measurement information of the load measuring means (M).
And determine the corresponding part during the swing operation.
Then, based on the measurement information of that part, the whole body of the subject or
The load corresponding to the foot on the follow swing side becomes the maximum
The time point (132) is determined by the hit ball time point detecting means (21).
Whether it is on the side that goes back in time from the detected hit ball equivalent time
The golf swing of the subject by determining
Diagnostic means (S) for disconnecting and display means for displaying a diagnostic result of the diagnostic means (S)
(4) A golf swing diagnostic device provided with: 2. The diagnostic device according to claim 1 , wherein the load is the maximum.
The process until it reaches a local minimum for the first time after
In this case, the load becomes a value corresponding to the weight value of the subject.
There is a point in time equivalent to the hit ball after the point in time (133)
The golf swing of the subject
2. The golf of claim 1, wherein the golf is configured to diagnose
Swing diagnostic device. 3. When the diagnosis means (S) is equivalent to the hit ball
The point is minimal only after the maximum load
It is determined whether or not the value is near the time point (134).
To diagnose the subject's golf swing
The golf swing diagnosis according to claim 1 or 2, which is configured.
Cutting device.