JPH04343866A - Golf swing checking system - Google Patents

Abstract

PURPOSE:To easily and correctly analyze the swing motion of a tested person by clearly comparing separate data at the time of comparing data based on the plural swing motions in a golf swing checking system. CONSTITUTION:In an apparatus for detecting the weight shifting condition of a tested person during golf swing in time series and analyzing the swing motion of the tested person, at the time of storing the data based on the separate swing motions, the impact time is detected and marked, and at the time of comparing the data, the impact times are matched and superposed.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a device used to measure changes in the state of weight during a test subject's golf swing over time, detect the movement of the center of gravity, and analyze defects in the test subject's golf swing. It is something.

0002

2. Description of the Related Art Reflecting the recent golf boom, various devices have been devised for the purpose of improving golf skills. One such system is a system that measures a subject's golf swing by detecting the state of the subject's weight shift during the golf swing.

[0003] Most of these devices use video TV or the like to visually observe the swing motion, but they detect the state of weight shift during the swing motion and use this detection result to monitor the swing motion. A device has been devised that can numerically analyze the state of a test subject's swing motion by displaying it along the time axis (Japanese Patent Application No. 2-29906
5, patent application No. 2-299066). The above-mentioned device detects the subject's weight shift state when actually hitting a ball, and can only compare the detection results based on the results of multiple ball hitting.

By the way, if the test subject using these devices is a highly skilled person, the swing motion will be constant and the swing motion will always be constant regardless of the presence or absence of a ball. However, in the case of an inexperienced golfer who has just started playing golf, individual swing movements may not be consistent, especially when the swing movement when practicing swinging without hitting the ball is different from the swing movement when actually hitting the ball. There are many. In the case of such inexperienced players, they are often able to perform a good swing motion that is stable to some extent (according to their level of proficiency) when practicing, but their swing motion when hitting the ball is often worse.

[0005] For this reason, the stability of the subject's swing motion can be detected by comparing the state of weight shift based on multiple swing motions, or if the swing motion is disrupted (bad swing) when actually hitting the ball. In order to recognize specifically at what stage and to what degree the collapse occurs during the swing motion, it is necessary to compare and display data from the practice swing.

[0006]

[Problem to be Solved by the Invention] Conventionally, when importing data based on a swing motion, a starting point was set in advance, and data was captured within a specified time from this starting point to the end of the swing motion. . Specifically, the subject was instructed by voice guidance to read ``3.2.1. The test subject was requested to start the swing motion by supporting timing such as "High".

However, it is extremely difficult to start the swing motion at the same timing every time, so there is a difference in timing between each swing motion, and furthermore, when comparing data with other people such as experts, individual differences between subjects This has caused a problem in that clear comparisons of multiple pieces of data may not be possible.

The present invention solves the above problems and makes it possible to clearly compare individual temporal data based on a plurality of swing movements. For example, by comparing the state of weight shift during practice swing and that during batting, The aim is to obtain a device that can clearly detect the test subject's proficiency level and habits in swing motion.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a golf swing check system that detects the subject's weight shift state during the golf swing in time series and analyzes the subject's swing motion. storage means for storing time-series detection information of individual weight shift states in multiple swing movements of the subject; and impact detection means for detecting the time of impact in the swing motion of the subject and marking the time of impact in the time-series detection information. and display means for superimposing and displaying the stored time-series detection information, and when the display means superimposes and displays the plurality of time-series detection information, the detected impact time It is characterized by being configured so that the individual data are displayed in a superimposed manner with the data being matched with each other.

0010

[Operations] Since the present invention is constructed as described above, it exhibits the following functions. First, when data on the state of weight movement of the test subject during the swing motion in the present invention is individually stored, the time of impact detected by the impact detection means is marked.

[0011] After the accumulation of data based on multiple swing movements is completed, and after the practice swing and ball hitting are completed,
Arbitrary data is selected and superimposed processing is performed on them, and at this time, the impact times of the individual data are made to match and the data are superimposed and displayed. Although this display method is not particularly limited, it is preferable that the display contents be displayed so that individual data can be clearly compared.

[0012] By the way, in the present application, the superimposition processing is performed by matching the time of impact, but this is because the timing of the start of the swing movement differs for each individual swing movement. This is because the timing from once starting until the end of one swing motion is almost constant.

That is, the swing motion starts at the moment when the take-back motion in which the club is pulled up from the address state is entered, and thereafter, at the top of the swing motion when the club has been lifted up, there is a downswing in which the club is pulled down in order to hit the ball. It ends after the time, the impact of actually hitting the ball, the follow-through after hitting the ball, and the finishing time of swinging the club.

[0014] The time of impact is almost the center of this series of swing motions, and by observing before and after the time of impact, it is possible to capture the entire swing motion of one (series of) motions. can.

[0015]Furthermore, at the time of impact, a relatively large change in body weight occurs during the swing motion, and it is easy to detect from the data and by observing the movement of the club at the position of the ball. , which can be incorporated into data.

[0016] Therefore, although there may be differences in the start timing between each swing motion or individual differences between subjects, there is no large difference in each timing during the swing motion after the swing motion has started, so multiple data It is extremely effective when comparing.

[0017] This is because the deviation between each swing movement and individual differences appear most greatly during the time from the address state to the start of the swing movement, and in the conventional method, this deviation is displayed as is. However, the present invention solves these problems and makes it possible to analyze (check) the subject's swing motion based on accurate comparison.

[0018] When displaying the detection results of multiple times, either the data of each time is displayed separately and superimposed on one centroid map, or the average value is calculated from the data of each time. Possible methods include displaying a combined center of gravity map. The former is considered to be appropriate for inexperienced people who have a lot of variation from swing to swing, and the latter is suitable for experts who make stable swing movements, but it is preferable to use a method that can be selected according to the subject's preference and level of proficiency. It is not limited to either. In either case, it goes without saying that processing is performed to match the times of impact and superimpose them, or to average and synthesize them.

[0019] Furthermore, a discrepancy detection means is provided for comparing the stored data with each other by a predetermined detection means, using the comparison data made at the same time of impact, and detecting and displaying the discrepancy between the data. You can. Any of these may be used as long as it compares the two detection data accurately along the elapsed time during the swing motion and detects the difference state (variation in the movement of the center of gravity in each swing motion).

[0020] Since defects in the subject's swing motion occur in areas where the above-mentioned differences are large,
By detecting and displaying the portion where the difference appears during the test subject's swing motion and its magnitude, defects in the test subject's swing motion can be determined (swing motion analysis).

However, since the swing motion is performed by a human subject, slight variations inevitably occur. For this reason, it is preferable to set an allowable range of different states as a threshold value when performing the detection, and to display only data when a different state equal to or greater than this threshold value is detected. Furthermore, since the degree of variation for each swing varies depending on the test subject's proficiency level, it is preferable that this threshold value can be changed in accordance with the test subject's proficiency level, preference, etc.

Furthermore, in addition to pointing out variations in the swing motion, the predetermined determination means is made to memorize variations in the state of weight movement caused by defects in the swing motion predicted in advance, and the difference in the detection results is If a situation corresponding to or similar to this is detected, the display unit may be configured to display a display to point out a defect in the subject's swing motion.

That is, a simple simulation method is adopted, and defects in expected swing motions and defects determined from detected data are evaluated, such as address, takeback, top, downswing, impact, etc. during the swing motion. It is sufficient to memorize each point such as follow-through, finish, etc., and display these defects at an appropriate time based on consistency with the test subject's detection data. Hereinafter, the present invention will be explained in more detail through Examples.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a weight shift state detection mechanism 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 left leg are respectively provided, and each floor reaction force meter has four load cells 2a to 2d.
, 2a' to 2d' are provided substantially radially around the pressurizing centers OL and OR.

The test subject performs a golf swing while resting on the floor reaction force meter 1L, 1R and positioning the left and right legs (soles of the feet) at the pressure center OL, OR. At this time, it is desirable to take into consideration the differences in the physique of each subject and to configure the system so that the interval (relative positional relationship) between the left and right floor reaction force meters can be varied.

Next, the method of detecting the center of gravity position in this embodiment will be explained using FIG. First, each load cell 2a
The outputs from ~d, 2a'~d' are respectively W1~W4, W
1' to W4', the loads WL and WR on the left and right legs and the overall load WA are: WL = W1 +W2 +W3 +W4WR =W1'
+W2'+W3'+W4'WA = WL +WR.

The position of the center of gravity of each left and right leg is determined by determining the coordinates and relative positional relationship of the left and right legs as shown in FIGS. 1 and 2. The position of the center of gravity of the left leg (xL, yL) is as follows: (W1 +W3))×L1
/WLyL=(W1 +W2 -(W3 +W4))
It is determined by ×L2/WL, and similarly the right leg center of gravity position (xR,
yR) can also be determined.

Furthermore, from these results, the overall center of gravity position (XA, YA) is determined from the coordinate system shown in FIG. 2(B).
-L3/2+xLYA=(WR/WA)×(yR-
yL)+yL.

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 determined based on the measurement results from the floor reaction force meters 1L and 1R. The above measurement and calculation results were obtained during the subject's golf swing, that is, from the start of the backswing from the address state to the top, through the downswing from the top, after impact, through the follow-through, and to the finish. By recording this over time, it is possible to measure changes in the center of gravity during the swing.

By the way, when analyzing a golf swing, the movement of the center of gravity during the swing as well as the swing conditions particularly at address, top, impact, and finish are important issues. When detecting the position of the center of gravity at each point during a swing using the above device, it is relatively easy to detect the position of the center of gravity at address and finish as it captures the beginning and end of the movement, but it can be detected relatively easily at the top of the swing. Furthermore, since the impact occurs in the middle of a series of swing movements, it is often difficult to detect it.

Therefore, in this embodiment, a separate detection means is provided to detect the impact, and an example of this impact detection means is shown in FIG. Here, it is assumed that the test subject placed on the floor reaction force meter 1L, 1R will actually hit the ball and perform a swing analysis. On the other hand, the optical sensor 32 is used to detect the point in time when the ball 31 is actually hit.

This is the detection of the time when the club hits the ball (at the time of impact), but actually the time when the golf club crosses the optical axis of the optical sensor is detected. Therefore, since the time of impact can be detected regardless of the presence or absence of a ball, it is possible to detect the time of impact even when the subject is practicing swinging. The time of impact detected here is incorporated into the previous data on the movement of the center of gravity over time, so that the time of impact can be clearly determined.

In this embodiment, the ball 31 is irradiated with the detection light from the lateral direction, but the system is not limited to this method. It is fine as long as it can be detected.

However, although there is a conventional method in which an optical sensor is embedded in the lower part of the ball placement section, this method has a problem in that dust and other foreign matter easily enter the detection section of the optical sensor. Furthermore, there are conventional examples of configurations in which a metal sensor is used to detect the passage of a club, but this requires the detection part to be brought close to the ball, which poses a problem of making the subject feel uneasy. Furthermore, in these two conventional methods, there is a risk that the subject may accidentally hit a part other than the ball with a club (in the case of so-called duffling), and there is a problem that there is a high possibility that the detection unit will be damaged. This embodiment has the advantage that these problems do not occur.

Next, FIG. 4 shows a schematic configuration of the golf swing check system according to this embodiment. In this example,
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 time of impact in the detection data over time. This clarifies the time of impact during the chronological recording of detection data.

On the other hand, at the top of the swing, the top of the swing generally begins with a backswing (performed by twisting the body to the right) and a downswing (performing by twisting the body to the left). It is considered to be a turning point (or turning point).

Therefore, in this embodiment, from the recording of the temporal detection data, it is considered that the change in the load between the left and right legs or the change in the total load indicates the top of the swing. An example of this temporal detection data is shown in FIG. In the figure, the point at which the total load falls roughly coincides with the inflection point of the load change between the left and right legs. In other words, since this point can be considered the top of the swing, the CP
In U43, recognize this point as the top and work on the data over time. As described above, it is possible to detect the center of gravity movement state in which the important times during the swing, such as address, top, impact, and finish, are clarified.

Next, an example in which the state of movement (trajectory) of the center of gravity during the swing is displayed as a center of gravity diagram will be described with reference to FIG. In this figure, the left leg center of gravity shift state is shown by line 61, the right leg center of gravity shift state is shown by line 62, and the total center of gravity shift state is shown by line 63. In addition, the front and left and right directions are shown in consideration of ease of recognition by subjects and the like.

Lines 61 to 63 showing these center of gravity movement states
Inside, "x" is displayed for the top time, and "+" is displayed for the impact time.
It is displayed and shown. And this center of gravity map is CRT44
Alternatively, it may be displayed on the printer 45 and shown to the subject. By looking at the center of gravity (movement state) diagram displayed in this manner, the subject can recognize at a glance the state of movement of the center of gravity during his or her own golf swing.

Here, although the center of gravity diagrams shown in FIGS. 5 and 6 mentioned above are displayed by matching the detected data with the impact, the storage means for the detected data for each swing in this embodiment will be explained below. do.

[0041] The present embodiment is provided with a storage means for storing data on the state of the center of gravity movement described above for each swing, and these data are stored separately for each swing motion. The configuration is such that these data can be extracted as a center of gravity map when necessary, and that the center of gravity map can be displayed at the same time as compared with other data.

[0042] Here, an example of a swing data detection method and display method when a swing motion is performed three times regarding general swing analysis will be explained using FIG. First, the subject performs a swing motion three times, and individual swing data is memorized. At this time, there is no particular restriction on the sampling time of the swing data, and it may start with voice guidance as in the conventional case. If the sampling time is determined to be only within a predetermined time period after the impact is detected as described above after the actual swing motion is started, there is no need to operate the device unnecessarily.

In this embodiment, out of these sampling data, two seconds before impact and one second after impact are assumed to be during a swing motion, and are used as swing data. This is because the majority of swing motions are performed within this time, and this detection time is not limited to this, and may be configured to be changeable.

FIG. 7 specifically shows the detection results obtained by performing three swing motions. Considering the detection data of the first swing as a reference, the start timing of the second swing is delayed, and the start timing of the third swing motion is delayed. On the contrary, it shows the case where it becomes faster.

[0045] If these individual detection data are displayed in a superimposed manner, there is no consistency between the respective pieces of data, so that they are completely worthless as comparison data. Furthermore, if composite data is created by averaging, it is conceivable that the data will have completely unknown correspondence with the swing motion.

For this reason, in this embodiment, only the swing data for 3 seconds before and after the impact is used as described above, and the times of impact of these swing data are made to coincide and are displayed in a superimposed manner.

[0047] As is clear from the individual superimposition diagrams of the plurality of data, by matching the times of impact and superimposing them, it is possible to clearly determine variations in each swing motion. Note that the sampling data shown in this example is from an advanced user, and there is relatively little variation among each data.

[0048] When comparing the data of another person, such as an expert, for example, when superimposing these stored data, it is necessary to match the times of impact for multiple swing data as described above. It is preferable to perform a superimposition process such as taking the average value in the state in which the swing motion is made, and by comparison based on such averaged data, the characteristics (habits, etc.) of the test subject's swing motion can be clearly determined.

[0049] Furthermore, if the subject memorizes the data for each swing and takes it out and compares it when necessary,
It is effective for investigating the results of practice and the cause of poor health. Also, if you memorize the swing data of professional players and advanced players,
There is an advantage that swing analysis can be performed more sophisticatedly and clearly by comparison with the test subject's data.

[0050]

Effects of the Invention As explained above, according to the present invention, when comparing or composing detection data based on a plurality of swing motions, it is possible to clearly distinguish individual data in order to match the time of impact and perform superimposition processing. This method has the advantage of being able to perform accurate comparative judgments, and also has the advantage of being able to measure accurate average values.

[0051] Therefore, defects in the movement of the center of gravity during the swing motion of the test subject can be clearly and easily recognized, and swing analysis can be easily performed.

[Brief explanation of the drawing]

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

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

FIG. 3 is an explanatory diagram showing an example of impact detection means according to the embodiment.

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

FIG. 5 is a diagram showing load change states in the same example.

FIG. 6 is an explanatory diagram showing an example of a center of gravity diagram in the same embodiment.

FIG. 7 is an explanatory diagram illustrating an example of individual data obtained when a subject performs a swing motion three times and a method of superimposing these data in the same example.

[Explanation of symbols]

1L, 1R...floor reaction force meter, 2a-d, a'-d'...Load cell, 32...Optical sensor,

Claims (1)

[Claims] Claim 1: A golf swing check system that detects the state of weight shift of a test subject during a golf swing over time and analyzes the swing motion of the test subject. A storage means for storing time-series detection information, an impact detection means for detecting the time of impact in the swing motion of the subject and marking the time of impact in the time-series detection information, and superposing the stored time-series detection information. and display means for displaying the plurality of time-series detection information in a superimposed manner, with the detected impact times being made to coincide with each other,
A golf swing check system characterized by being configured to display individual data in a superimposed manner.