JP2711369B2 - Golf swing check system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring a change in a weight of a subject during a golf swing in a time series and detecting a moving state of the center of gravity to analyze a defect of the golf swing of the subject. Things.

[0002]

2. Description of the Related Art In view of the recent golf boom, various devices aiming at improving the skill of golf have been devised.
As one of them, a system has been devised which detects a weight shift state of a subject during a golf swing and analyzes the subject golf swing.

Many of these devices are based on external observation means during a swing operation using a video TV or the like. The apparatus detects a weight shift state during the swing operation and detects the result of the detection during the swing operation. A device that can numerically analyze the state of the subject's swing motion by displaying the information along the time axis has been devised (Japanese Patent Application No. 2-2990).
65, Japanese Patent Application No. 2-299066). The above-described device detects the weight shift state of the subject at the time of actual hitting, and can only compare the detection results based on the results of multiple hits.

[0004]

By the way, if the subject using these devices is a skilled person with a high level of skill, the swing operation is constant, and a constant swing operation can be performed regardless of the presence or absence of the ball. is there.

[0005] However, in the case of an inexperienced person who has just started golfing, the swing motion without hitting the ball is often different from the swing motion when actually hitting the ball. In some cases, it is often possible to perform a certain stable (satisfactory) swing operation, and the swing operation at the time of hitting the ball is often worse.

In the case where the swing motion is distorted (bad swing) at the time of the actual hitting, it is not possible to judge from the external appearance alone how much collapse occurs at which stage during the swing motion. There are many.

[0007] The present invention solves the above-mentioned problems, and compares the weight shift state at the time of swinging with that at the time of hitting, thereby improving the proficiency and habit (habit) of the subject in the swing motion.
It is an object of the present invention to obtain a device capable of detecting the above.

[0008]

Means for Solving the Problems] For the purpose achieved, the
According to the invention of the present application, in a golf swing check system that detects a weight shift state of a subject during a golf swing and analyzes the golf swing of the subject, a first storage unit that stores the weight shift state at the time of swinging; And second storage means for storing the weight shift state of
Display means for simultaneously displaying the stored result of the second and the second stored results.

In the present invention, the storage means is capable of storing individual weight movement states by a plurality of swings, and the display means is capable of simultaneously displaying the results of the plurality of swings. Further, in the present invention, the first description
Comparing the memory result with the second memory result, the mutual memory result
Detecting means for detecting the difference between the two, and displaying the detection result
And second display means.

Further , according to the invention of the present application, the detection result is
When a predetermined threshold is exceeded, the corresponding swing motion
A third display means for displaying the middle time and the difference width
ing.

[0011] The invention according to the present application provides the detection result
From the difference between the
Faults in the expected swing motion are stored in advance
And based on the detection result of the subject,
Determination means for displaying defects in the swing motion
Can be

On the other hand, in another invention of the present application, the left and right
Is the result of measurement by individual floor reaction force measuring means corresponding to each leg?
Detected the weight shift state of the subject during the golf swing
Golf swing to analyze the golf swing of the subject
In the check system, each of the measuring means
Based on the measurement results, the load, load point, and
Calculating means for calculating the center of gravity of the entire body;
Recording means for recording the calculation result over time during a swing
And a golf swing based on the record result over time.
Data at a specific point in time
Judgment means to be taken in and output of the recording result over time
Output means for specifying and outputting the specific point in time
When the ball is not placed at the ball placement position,
Series Detection of Weight Shift Status during Swing Motion of Various Subjects
First storage means for storing information as swing information;
Of the subject with the ball placed on the
Information on time-series detection of weight shift during winging
Second storage means for storing information as information, and the first storage means
Storage result of swing information in the stage and the second storage means
Display of the results of hitting information in the game in chronological order
Display means for displaying
Provide an analysis system.

[0013]

The present invention is configured as described above, and has the following effects. First, in the invention according to the present application , the first storage means and the second storage means store data indicating the weight shift state at the time of swing and data at the time of hitting, respectively, and the swing and hitting are completed. After that, both storage results are displayed. Although this display method is not particularly limited, it is preferable that the display content is displayed so that a clear swing can be clearly compared with a hit ball.

In the invention according to the present application, the stability of the measurement result is improved by storing the data at the time of swinging and at the time of hitting the ball a plurality of times, respectively. In other words, even if it is possible to judge a defect in each swing operation by detection once,
Although it is not possible to judge the individual's habit or the like in the swing motion, the present invention solves this problem by storing data a plurality of times and displaying them at the same time.

Here, when displaying the detection results of a plurality of times, the data of each time are separately displayed on one barycentric view and are superimposed, or the average value is calculated from the data of each time. For example, a method of displaying a combined centroid diagram can be considered. It is considered that the former is suitable for an inexperienced person who has a lot of variation for each swing, and the latter is suitable for an expert who performs a stable swing operation, but a method that can be selected according to the taste of the subject and the skill level is preferable. However, it is not limited to either.

In the invention according to the present application, the stored data is compared by the detecting means, and the mutually different states are detected and displayed. That is, the detecting means compares the two pieces of detection data along the elapsed time during the swing operation, and detects these different states (variations in the movement of the center of gravity in each swing operation).

Since a defect in the swing motion of the subject occurs in a portion where the difference greatly appears,
By detecting and displaying the portion where the difference appears during the swing motion of the subject and the size thereof, the defect of the swing motion of the subject can be determined.

However, since the swing operation is performed by a human being as a subject, a slight variation inevitably occurs. For this reason, as in the invention according to the present application, it is preferable that an allowable range of the different state is determined as a threshold when performing the detection, and only data when a different state equal to or larger than the threshold is detected is displayed. Furthermore, since the degree of variation for each swing varies depending on the subject's proficiency, it is preferable that this threshold can be changed according to the subject's proficiency, taste, and the like.

Next, in another invention of the present application , not only the variation during the swing operation is pointed out, but also the variation in the weight movement state caused by the fault of the swing operation expected in advance is stored in the determination means, When the difference state of the detection result corresponds to or is close to the difference state, the display means displays a display to point out a defect in the subject's swing motion.

That is, by adopting a simple simulation method, a defect of an expected swing operation, a defect determined from detected data, and the like can be determined by, for example, address, takeback, top, downswing, impact, and the like during a swing operation. What is necessary is just to memorize for every point, such as a follow-through, a finish, etc., and to display these faults at an appropriate time based on the consistency with the test subject's detection data. Hereinafter, the present invention will be described in more detail with reference to examples.

[0021]

FIG. 1 schematically shows a mechanism for detecting a weight shift state in a golf swing check system according to an embodiment of the present invention. In the detection mechanism according to this embodiment, floor reaction force meters 1L and 1R corresponding to the right leg and the left leg are respectively provided, and each of the floor reaction force meters has four load cells 2a to 4R.
d, 2a'~d 'are provided substantially radially around pressing center O _L, the O _R.

[0022] Subjects floor reaction force meter 1L, rests on 1R, performs a golf swing while positioned left and right legs (sole) in pressing center O _L, O _R. At this time, it is desirable that the distance (relative positional relationship) between the left and right floor reaction force meters be made variable in consideration of the difference in the physique and the like of each subject.

Next, a method of detecting the position of the center of gravity in this embodiment will be described with reference to FIG. First, each load cell 2a
~d, 2a'~d 'respectively output from the W ₁ ~W _4, W _1'
'When a load W _L, W _R and total load W _A exerted on the left and right _{leg, W L = W 1 + W} 2 + W 3 + W 4 W R = W 1' ~W 4 + W 2 '+ W 3' + W 4 ' obtained by the _{W A = W L + W R} .

When the coordinates and relative positional relationship of the left and right legs are determined as shown in FIGS. 1 and 2, the center of gravity of the left leg (x _L , y _L ) becomes x _L = ( _{W 2 + W 4 - (W} 1 + W 3)) × L 1 / W L y L = (W 1 + W 2 - (W 3 + W 4)) calculated in × _{L 2} / W L, similarly right leg barycentric position (X _R , y _R ) can also be obtained.

Furthermore, the center of gravity of the whole from these results (X _A, Y _A) when seeking from the coordinate system shown in FIG. _{2 (B), X A =} (W R / W A) × (L 3 -x _L + x _R) a _{-L 3/2 + x L Y} a = (W R / W a) × (y R -y L) + y L.

As described above, the position of the center of gravity of each of the left and right legs and the position of the center of gravity of the entire body can be obtained based on the measurement results from the floor reaction force meters 1L and 1R. During the golf swing of the subject, that is, starting the backswing from the address state and reaching the top, after impact from the top through the downswing, after follow-through to the finish, the above measurement results and calculation results Is recorded over time, the fluctuation state of the center of gravity during the swing can be measured.

By the way, when analyzing a golf swing, the movement of the center of gravity during the swing, and particularly the swing state at the time of address, top, impact, and finish, become a problem. When detecting the position of the center of gravity at each time point during a swing with the above-described device, the address time and the finish time can be relatively easily detected because they capture the first and last states of the movement, but can be detected at the top time. In addition, at the time of impact, since it is in the middle of a movement during a series of swings, it is often difficult to detect the impact.

Therefore, in this embodiment, separate detection means is provided for detection at the time of impact, and FIG. 3 shows an example of this impact detection means. Here, it is premised that a subject placed on the floor reaction force meters 1L, 1R actually hits the ball and a swing analysis is performed, and the ball 31 placed on the ball placing portion 33 is assumed. The optical sensor 32 is used to detect the point at which the ball 31 is actually hit.

This is a detection at the time of impact during the swinging operation, but actually detects a time when the golf club crosses the optical axis of the optical sensor. That is, by arranging the optical axis of the optical sensor at the ball mounting position or in the vicinity of the upper portion thereof, the impact time can be detected regardless of the presence or absence of the ball, so that the impact time can be detected even when the subject swings. Has become. Then, at the time of the impact detected here, the time of the impact is taken into the previous time-dependent center-of-gravity shift data, and the impact time can be clearly determined.

In this embodiment, the detection light is applied to the ball 31 from the lateral direction. However, the present invention is not limited to this method, and the time when the club passes the mounting position of the ball 31 is determined. Anything that can be detected may be used.

However, there is a conventional example in which an optical sensor is buried under the ball mounting portion. However, in this method, there is a problem that dust and other foreign matter easily enter the detecting portion of the optical sensor. In addition, there is a conventional example in which a metal sensor is used to detect the passage of the club, but there is a problem in that the detection unit needs to be brought close to the ball, thereby giving anxiety to the subject. Furthermore, in these two conventional methods,
Since the subject may accidentally hit a portion other than the ball with the club (in the case of so-called duffling, etc.), there is a problem that the detection unit is likely to be damaged. According to this embodiment, there is an advantage that these problems do not occur.

Next, FIG. 4 shows a schematic configuration of a golf swing check system according to the present embodiment. In this embodiment,
The detection outputs from the left and right floor reaction force meters 1L and 1R are input to the A / D converter 42 and output to the CPU 43 as detection data. The CPU 43 records this detection data over time, takes in the detection signal from the impact detection sensor 32 from the input / output device 42, and sets the impact time in the detection data over time. This clarifies the time of impact during the temporal recording of the detection data.

On the other hand, at the time of the top of the swing, the top of the swing is generally changed from a backswing (a twisting motion of the body to the right) to a downswing (executed by a twisting motion of the body to the left). It is considered to be a conversion point (or a turning point).

For this reason, in the present embodiment, it can be considered from the recording of the temporal detection data that a change in the load between the left and right legs or a change in the total load indicates the top of the swing. FIG. 5 shows an example of this temporal detection data. In the figure, the point at the position where the total load falls generally coincides with the inflection point of the load change between the left and right legs. That is, since this point can be considered as the top of the swing turning point, C
The PU 43 recognizes this time as the top and works on the data over time. As described above, it is possible to detect the state of movement of the center of gravity in which the important address during the swing, the top time, the impact time, and the finish time are clarified.

Next, an example in which the state of movement (trajectory) of the center of gravity during these swings is displayed as a center of gravity diagram will be described with reference to FIG. In this figure, the state of movement of the center of gravity of the left leg is indicated by a line 61.
The state of movement of the center of gravity of the right leg is indicated by a line 62, and the state of movement of the total center of gravity is indicated by a line 63. In addition, the display in the forward direction, the left and right direction, and the like are shown in consideration of the ease of recognition of the subject and the like.

Lines 61 to 63 indicating the state of movement of the center of gravity
During the top, "x" is displayed at the time of top, and "+" is displayed at the time of impact
Shown and shown. And this center of gravity diagram is CRT44
Alternatively, it is displayed by the printer 45 and shown to the subject or the like. By looking at the center of gravity (moving state) diagram displayed in this manner, the subject can recognize at a glance the state of the center of gravity moving during his or her own golf swing.

By the way, the present embodiment is provided with a storage means for storing the data of the state of movement of the center of gravity for each swing, and these data are stored separately when swinging and when hitting a ball. Then, when necessary, these data can be taken out as a barycentric diagram, and further, the barycentric diagram can be displayed simultaneously with other data.

Here, an example of a swing data detection method and an example of a display method when a swing and a hit are performed three times each in a general swing analysis will be described with reference to FIGS. 7 and 8. FIG. First, the subject performs the swing three times, and the swing data is stored as the swing data. next,
The ball is actually hit three times and stored as hit ball data. Then, these stored data are superimposed on each other. In this case, taking into consideration the variation between the data, the reference time in each stored data is, for example, a top time at the start of a swing, a time at an impact, or the like. Are desirably matched and superimposed.

FIG. 8 shows an example of a display method when an average value is used for each data. As is clear from the display results, there is not much difference between a skilled person and a hit ball in a skilled person, but a large difference is observed in each waveform in an unskilled person. For example, from the data of the inexperienced person in FIG. 8, it is clear that a significant deviation has occurred from the back swing to the top and after the impact (movement from follow to finish).

For this reason, in this embodiment, these deviations are detected, and a large part of the deviation is displayed by CRT or printing (not shown). Then, the subject can easily recognize the defect in his or her swing motion by looking at the display and the display of FIG. 8.

Further, if the test subject stores the data for each swing and takes out and compares the data when necessary,
This is effective for finding out the results of practice and the causes of malfunctions. Also, if you store swing data of professional players and advanced players,
There is an advantage that the swing analysis can be performed more sophisticatedly and clearly by comparison with the subject data.

[0042]

As described above, according to the invention of the present application, the moving state of the center of gravity during the swing of the subject is
Because it is possible to clearly detect when swinging and when hitting,
There is an advantage that the swing analysis can be easily performed by recognizing a defective point in the state of movement of the center of gravity which is good at the time of swinging but occurs only at the time of hitting the ball.

Further, according to the invention of the present application , the above-mentioned defective point can be recognized more accurately, and the habit of the subject's swing motion and the like are output by using the data of a plurality of times to output the state of movement of the center of gravity. From the subject can be recognized very easily.

Further, according to the invention of the present application, a defective point at the time of hitting is detected and displayed from the data at the time of swinging and at the time of hitting, so that the subject can easily recognize the defective point in the swing motion.

According to the invention of the present application , the threshold value is determined in a timely manner in detecting the defective point (for example, the threshold value is set to be small for a skilled person and large for an unskilled person), so that the detection can be performed according to the proficiency of the subject. This has the advantage of widening the range of use.

On the other hand, in another invention of the present application, the defect of the subject's swing motion or the like is directly displayed by the determination means, and the swing check is further facilitated.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a floor reaction force meter of a golf swing analysis system according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a method of detecting a center of gravity in the embodiment.

FIG. 3 is an explanatory diagram illustrating an example of an impact detection unit according to the embodiment.

FIG. 4 is a block diagram showing a configuration of the embodiment.

FIG. 5 is a diagram showing a load change state in the embodiment.

FIG. 6 is an explanatory diagram showing an example of a centroid diagram in the embodiment.

FIG. 7 is a block diagram showing a state of operation when comparing a swing and a hit in the embodiment.

FIG. 8 is a diagram showing an example in which the load change state in the embodiment is displayed by comparing the swinging state and the hitting state.

[Explanation of symbols]

 1L, 1R: floor reaction force meter, 2a to d, a 'to d': load cell, 32: optical sensor,

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-55075 (JP, A) JP-A-3-26281 (JP, A) JP-A-50-55429 (JP, A) 12180 (JP, A) JP-A-1-310679 (JP, A)

Claims (3)

(57) [Claims] In a golf swing check system for detecting a weight shift state of a subject during a golf swing in a time series and analyzing the golf swing of the subject, time series detection information of a weight shift state during a swing is stored. First storage means, and second storage means for storing time-series detection information of a weight shift state at the time of hitting a ball.
And a storage means, the first storage results and chronologically parallel a second storage Results
A display unit for displaying the stored data , and comparing the first storage result and the second storage result with each other.
Detecting means for detecting a difference between the stored results in a time-series manner, second display means for displaying the detected result, and a case in which the detected result exceeds a predetermined threshold value.
The third that displays the time during the swing motion and the difference width
Display means, and the storage means stores individual weight shifts by a plurality of swings.
Time-series detection information of a moving state can be stored, and the display means displays the plurality of swing results in a time-series manner.
A golf swing check system configured to be able to be displayed in parallel with the golf swing check system. 2. A defect in a swing motion predicted based on a time during a swing motion and a difference width from a time-series detection result of the difference is stored in advance, and a corresponding defect is detected based on the detection result of a subject. 請 that comprising the determination means for displaying the drawbacks of the swing motion of
The golf swing check system according to claim 1. 3. Individual floor reaction forces corresponding to the left and right legs of the subject
From the result of measurement by the measurement means, the golf swing of the subject
Detects the state of weight shift during
In the golf swing check system that performs the analysis, each of the legs is determined based on the measurement result from each of the measurement units.
To calculate the weight, load point, and center of gravity of the entire body
Calculation means, and the calculation result during the golf swing of the subject is recorded over time.
Recording means for recording, based on the results of the recording over time, during the golf swing
Recognize a specific point in time and import it into data over time
Determining means for determining the time, and when outputting the recording result over time,
Output means for clearly indicating the position of the ball when the ball is not placed at the ball placement position.
First storage means for storing, as swing information , time-series detection information of a weight shift state during a swing operation of an examiner, and a test subject in a state where a ball is placed at a ball placement position.
Hitting a sequence detection information when the weight shift state during the swing operation
A second storage means for information and to store, display means for displaying the stored results of the hitting information in the storage result and the second storage means of a practice swing information in the first storage means time series overlaid , A golf swing analysis system comprising: