JP2695346B2 - Hitting motion practice machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table on which a subject who holds a ball hitting tool and performs a ball hitting operation, and a load detection means provided on the table, and detects the load applied to the table. A ball hitting is provided with arithmetic processing means for calculating a load center, ball hitting operation start detecting means for detecting a ball hitting operation start time point, and display means for displaying a locus of the load center after the ball hitting operation start time point based on the detection signal. Regarding exercise training machine.

[0002]

2. Description of the Related Art Such a hitting ball training machine is used for practicing a ball hitting motion such as golfing and batting. It is well known that in the practice of the hitting ball operation, whether or not the center of gravity is correctly moved accompanying the hitting ball motion is an important index for forming a correct hitting ball motion form. Therefore, the hitting ball training machine measures the center of gravity movement during the hitting ball motion and outputs the measurement result to check the quality of the hitting ball motion.

Further, the center of load before the start of the ball hitting movement fluctuates irregularly, and, for example, in golf ball hitting, the subject often performs a so-called waffle motion in an addressing posture. Varies according to the rules. If the trajectory of the load center that fluctuates irregularly is displayed, it becomes difficult to see the trajectory of the load center during the original ball hitting motion. Therefore, in such a ball hitting practice machine, only the locus of the load center after the start of the ball hitting operation is displayed.

However, in a ball hitting practice machine, in addition to checking the locus of the load center after the start of the ball hitting operation, the ball hitting operation is started in order to determine whether it is the left foot load or the right foot load. Checking the previous address is also important. Therefore, in order to display the state of the address in an easy-to-see state, conventionally, the average value of the load centers within a range in which the moving speed of the load center before the start of the hitting motion is equal to or less than the set value is calculated, and the average value It has been considered that the indicated point is displayed as a predetermined mark together with the locus of the load center (Japanese Patent Application No.
-73536).

[0005]

However, in the above-mentioned conventional example, for example, in golf ball striking motion, when the subject performs a severe waffle motion in the address posture, that is, the moving speed of the load center does not fall below the set value. In this case, the predetermined mark is not displayed, and the address cannot be checked. Therefore, it has been desired to improve the address check so that the address can be checked as desired even when such an intense waffle operation is performed.

The present invention has been made in view of the above circumstances, and an object thereof is to enable address check as desired regardless of any change in the load center before the start of a ball hitting operation. To do.

[0007]

SUMMARY OF THE INVENTION A ball hitting motion practice machine according to the present invention is based on a table on which a subject who holds a ball hitting tool and performs a ball hitting motion rides, and detection information from load detecting means provided on the table. , A calculation processing means for calculating the load center of the load applied to the table, a hitting ball movement start detecting means for detecting the starting point of the ball hitting operation, and a display for displaying the locus of the load center after the ball hitting operation start point based on the detection signal. In the first characteristic configuration, the arithmetic processing means calculates an average value of the load centers before the start of the ball hitting operation, and the point indicated by the average value is used as a predetermined mark to define the load center. It is configured to be displayed on the display means together with the locus of. According to a second characteristic configuration, the table comprises a plurality of load measuring tables each independently equipped with a load detecting means so as to detect a load center corresponding to each foot of the subject, and the arithmetic processing means comprises the hit ball. The average value of the load centers corresponding to the left and right feet before the operation start time is calculated, and the point indicated by the average value is used as a predetermined mark on the display means together with the loci of the load centers corresponding to the left and right feet. It is configured to be displayed.

[0008]

According to the first characteristic configuration, the arithmetic processing means calculates the load center of the load applied to the platform on which the subject rides, based on the detection information from the load detecting means, and uses the detection signal of the hitting ball movement start detecting means. Based on this, the average value of the load centers before the time when the ball hitting operation starts is calculated. Then, the point indicated by the average value is displayed as a predetermined mark on the display means together with the locus of the load center (see, for example, P3 in FIG. 4). In other words, in consideration of the fact that the motion of the subject at the address is considered to be repetitive motion toward one stable point, the average value of the load center is calculated regardless of the change in the moving speed of the load center,
The point indicated by it is displayed by a desired mark as an index corresponding to the address. According to the second characteristic configuration, the center of load corresponding to each of the left and right feet of the subject is calculated based on the detection information from the load detecting means, and the ball hitting operation start time point is calculated based on the detection signal of the ball hitting operation start detecting means. The average value of the load centers corresponding to the left and right feet before is calculated. Then, the point indicated by the average value is set as a predetermined mark and displayed on the display unit together with the loci of the load centers corresponding to the left and right feet.

[0009]

According to the first characteristic configuration, as described above, the average value of the load center of the whole body is displayed by a predetermined mark regardless of the change of the load center before the start of the hitting motion. Therefore, the address can be always checked as desired. According to the second characteristic configuration, as described above, the average value of the load centers corresponding to the left and right feet is predetermined regardless of the change in the load centers corresponding to the left and right feet before the start of the ball hitting motion. Since it is displayed with a mark, it is now possible to check the address on each of the left and right feet as desired.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a golf swing training machine will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the golf swing training machine of this embodiment includes a platform 1 on which a subject rides, a load detecting means 11, a tee stand 2, a processing device 3, and a display means 4 provided on the platform 1. Prepare Then, the subject holding the club 12 as a ball hitting tool rides on the table 1 and calculates the load center of the load applied to the table 1 when performing the ball hitting operation, and stores the time series data thereof and after the ball hitting operation is completed. The locus of the load center is displayed on the display means 4, the average value of the load center before the start of the hitting motion is calculated, and the point indicated by the average value is displayed on the display means 4 as a predetermined mark. The test subject can judge the quality of the ball hitting motion by observing the locus of the load center displayed after the ball hitting motion is finished, a predetermined mark indicated by the average value, and the like. Hereinafter, each device will be described.

The base 1 is composed of two load measuring bases 13 and 14, and the load detecting means 11 includes the load measuring bases 13 and 14.
It is composed of eight load cells which are provided at four corners of 14 and detect a change in load applied to the load measuring bases 13 and 14 as a change in voltage. Since the eight load cells 11 share and support the total load applied to the load measuring bases 13 and 14, the center of gravity of the load (the load center of each of the left and right feet) can be obtained based on the share ratio. The outputs of the eight load cells 11 are input to the processing device 3 as shown in FIG. 3, and the arithmetic processing means 31 calculates the load centers of the entire body and the left and right feet.

A mounting tool 22 for mounting a ball 21 is mounted on the tea stand 2. Also, the ball 21 on the mounting tool 22
There is provided a first sensor 23 for detecting the presence or absence of the head, and a second sensor 24 for detecting the presence or absence of the head of the club 12 at a position in front of the mounting tool 22. Both are reflection type optical sensors, and these detection signals are input to the processing device 3 as shown in FIG. The first sensor 23 is used for detection at the time of impact. The second sensor 24 detects the time point when the ball hitting operation starts. That is, the second sensor 24 functions as a hitting ball movement start detecting means.

The processing unit 3 synthesizes arithmetic processing means 31 composed of a CPU and I / O, a main memory 32 composed of a semiconductor memory, an auxiliary memory 33 composed of a magnetic disk memory, and electronic sounds. The sound generating means 34 for generating from the speaker is provided. Further, a signal processing circuit for A / D converting the output voltage from the load cell 11, shaping the signals from the first sensor 23 and the second sensor 24 and inputting them to the arithmetic processing means 31 is also provided (FIG. 3).

Next, the process of obtaining the load centers of the entire body and the left and right feet will be described. The test subject holding the club 12 has two load measuring tables 1 at the center of the table 1.
Stand on 3 and 14 with their left and right feet on top of each other. The load measuring table 13 on which the subject places his left foot will be described as an example. Since the load of the load cell 11 at each of the four corners of the load measuring table 13 is canceled in advance, the outputs W1, W2, W3 are obtained. , W4 is the total load WL of the left foot of the subject on the load measuring table 13. That is, WL = W1 + W2 + W3 + W4 Furthermore, at this time, since the shared output of each load cell differs depending on the relationship between the position to which the load is applied and the installation position of the four load cells 11, the load measuring table 13 is determined from these outputs.
The center of load of the load applied to can be determined. That is, the left-right direction component X and the front-back direction component Y of the load center expressed with the load cell 11 (W1) in FIG.
Each load cell 11 has a width a in the X direction and a width b in the Y direction.
In the case of being arranged at the four corners of the rectangular load measuring table 13, it can be obtained from X = (W2 + W3) × a / WL Y = (W3 + W4) × b / WL. Even when the load cells 11 are not arranged at the four corners of the rectangle, the center of the load can be obtained by performing the correction unique to the geometrical arrangement of the load cells. Further, if three or more load cells are arranged, the load center applied to the table can be obtained. The load measuring table 14 on which the subject places his right foot is also the load measuring table 13
The load center of the load applied to the load measuring table 14 can be obtained in the same manner as above.
Also, regarding the load center of both legs of the subject, that is, the whole body,
Assuming that the load applied to the load measuring table 14 is WR, from the outputs W5 to W8 of the load cell 11, WR = W5 + W6 + W7 + W8, the load WT of the whole body is found by WT = WL + WR, and the load of the whole body is further calculated. Assuming that the distance between the load center corresponding to the left foot and the load center corresponding to the right foot of the subject is L, on the line segment connecting the left and right load centers, from the load center corresponding to the left foot, WR × L / It is located at a position distant from WT, and this may be calculated.

The arithmetic processing means 31 has a sampling period t.
The load centers of the whole body and each of the left and right feet are calculated from the above equation for each time and stored in the main memory 32 as time series data.

At this time, the main memory 32 stores time-series data for a set time before and after the impact time as a reference. That is, the set time T1 before the impact time
Minute time series data and the set time T2 after the time of impact
Minute time series data is stored. Here, the impact time point is a time point when the state where the ball 21 is present on the mounting device 22 is changed to a state where the ball 21 is not present, and the operation processing unit 31 detects the impact time based on a change in the detection signal of the first sensor 23. Can be.

The storage areas of the main memory 32 for storing time-series data are, in terms of software processing, a first area for storing data before the impact time point and a second area for storing data after the impact time point. It is divided into Then, the first area and the second area respectively correspond to the set time T
A storage capacity enough to store the number of time-series data obtained by dividing 1 and T2 by the sampling period t is secured.

When the first area overflows, the old data is sequentially discarded, and the second area is
It is configured to stop storing when an overflow occurs. As a result, the first area and the second area store time-series data for a set time (T1 + T2) before and after the time of impact.

When the set time T2 ends, it is considered that the ball hitting operation has ended, and the arithmetic processing means 31 causes the main memory 3 to operate.
The time-series data of the load center stored in 2 is interpolated and output to the display means 4 to be displayed as a continuous locus. However, the starting point of the ball hitting operation is determined by the procedure described below, and only the locus after the starting point of the ball hitting operation is displayed on the display means 4.

The starting point of the ball hitting operation is determined by the detection signal of the second sensor 24 which detects the presence / absence of the head of the club 12 at the front side of the mounting tool 22 of the ball 21 (on the backswing side). That is, when the head shifts from the address to the backswing, the head of the club 12 moves from the address position to the backswing side, and the time when the head crosses the optical path of the second sensor 24 is detected from the detection signal of the second sensor 24.
This is the starting point of the hitting motion.

However, in the waffle operation, the club 12
It is necessary to catch the last edge by ignoring the change in the detection signal caused by the head of the second sensor 24 repeatedly traversing the optical path of the second sensor 24. Further, it is necessary to ignore a change in the detection signal generated when the head of the club 12 crosses the optical path of the second sensor 24 immediately before the time of impact.

Therefore, the arithmetic processing means 31 synchronizes with the second sensor 24 in synchronization with the sampling period t of the time series data such as the load center at the set time T1 before the impact time.
Is also sampled and stored in the main memory 32. When outputting the time-series data of the center of load to the display device 4 after the set time T2, the time-series data of the detection signal of the second sensor 24 stored in the main memory 32 is traced back from the time of the impact to a predetermined time (100 ms). ) Except for the first edge, that is, the starting point of the hitting operation.

The locus data of the load centers of the whole body and the left and right feet after the start of the hitting motion obtained as described above are output to the display means 4 and displayed, and the operation panel (not shown). ) From the auxiliary memory 3
It can also be stored in 3 and saved. Then, it can be read out when necessary and displayed on the display means 4 as a reference locus.

The loci of the load centers of the entire body and the left and right feet during the ball striking motion displayed on the display means 4 are, for example, as shown in FIG.
Draw curves 40, 41, 42 as shown in FIG. Point P in the figure
1 corresponds to the time point at which the ball is hit, and point P2 corresponds to the time point at impact. The figure shows the locus when a right-handed subject performs a ball hitting motion.The load center of the entire body at this time is
It starts from approximately the midpoint P1 of both feet and moves to the right foot with the backswing, and with the downswing, moves to the left foot while drawing a gentle arc in the toe direction.

At the point P2 corresponding to the impact time point, the load center of the whole body is located substantially at the center of the left foot, and in the follow swing after the impact, the load center of the whole body ends by drawing a small circle behind the inside of the left foot. In addition, at the time of starting the ball hitting operation P
1 and the point P2 corresponding to the impact time point are displayed as marks next to the loci of the load centers of the entire body and the left and right feet as shown in FIG.

Further, in this golf swing training machine, the average value of the load centers of the entire body and the left and right feet at the time of addressing is calculated and displayed as a mark. First, the arithmetic processing means 31 calculates, from the data of the load centers of the entire body and the left and right feet stored in the main memory 32,
The average value of the data before the start of the ball hitting operation is calculated. When the average values of the load centers of the entire body and the left and right feet before the start of the ball hitting motion are obtained, the arithmetic processing means 31
As shown in FIG. 4, a point P3 indicated by the average value is displayed as a predetermined mark (circle) on the display means 4 together with the loci of the load centers of the entire body and the left and right feet after the start of the hitting motion. So that it can be identified even if it overlaps with the trajectory of the load center,
It is necessary to display this P3.

The point P3 indicated by the predetermined mark as described above indicates the average load center of the whole body and the left and right feet at the time of addressing. On the other hand, the tip portion P1 of the locus of the load center indicates the load centers of the entire body and the left and right feet at the time of starting the ball hitting motion. Both P1 and P
Checking the deviation of 3 is one effective information for knowing whether or not the center of gravity is properly moved at the start of the hitting motion.

[Other Embodiments] In the above embodiment, the number of load measuring bases is two, but it is also possible to use two or more load measuring bases, and a separate load measuring base for measuring the load center of the whole body is provided, and the load measuring base 13 is provided. , 14 may be arranged in two layers. In the above embodiment, the load center locus 40 of the entire body and the load center loci 41 and 42 of the left and right feet are simultaneously displayed on the display means 4, but they may be separately displayed. In the above embodiment, the average value P of the load centers before the time point P1 at which the ball is hit is started
3 is displayed separately from the load center loci of the whole body and the left and right feet after the start of the ball hitting motion. In the sense that the load center moves from this average value P3 to P1
And P3 may be displayed by connecting them with an appropriate line.

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

[Brief description of the drawings]

FIG. 1 is a plan view of a golf swing practice machine according to an embodiment of the present invention.

FIG. 2 is a side view of the golf swing training machine according to the embodiment of the present invention.

FIG. 3 is a control block diagram of the golf swing training machine according to the embodiment of the present invention.

FIG. 4 is a diagram showing a locus display of a load center.

[Explanation of symbols]

 1 unit 4 display means 11 load detecting means 12 ball hitting tools 13 and 14 load measuring table 24 ball hitting operation start detecting means 31 arithmetic processing means

Claims (2)

(57) [Claims] 1. A table (1) on which a subject who holds a ball hitting tool (12) and performs a ball hitting motion rides, and the detection information from a load detection means (11) provided on the table (1). Arithmetic processing means (31) for calculating the load center of the load applied to the table (1), hitting ball movement start detecting means (24) for detecting the ball hitting operation start time point, and after the ball hitting operation start time point based on the detection signal. In the ball hitting practice machine, which is provided with display means (4) for displaying the locus of the load center, the arithmetic processing means (31) calculates an average value of the load centers before the time point at which the ball hitting operation is started. A ball hitting practice machine configured to display the point indicated by the average value as a predetermined mark on the display means (4) together with the locus of the load center. 2. A plurality of load measuring stands (13, 1) each independently equipped with a load detecting means (11) so that the stand (1) can detect a load center corresponding to each of the left and right feet of a subject.
4), the arithmetic processing means (31) calculates an average value of load centers corresponding to the left and right feet before the time point at which the ball hitting operation starts, and the point indicated by the average value is used as a predetermined mark. 2. The ball hitting training machine according to claim 1, wherein the ball hitting exercise trainer is configured to be displayed on the display means (4) together with loci of load centers corresponding to the left and right feet.