JPH04309379A - Ball hitting training machine - Google Patents

Abstract

PURPOSE:To provide the ball hitting training machine which can detect exactly a start time point of a ball hitting, even if a person to be tested executes a waffle. CONSTITUTION:This training machine is constituted so that a ball hitting time detecting means 21, and a ball hitting club detecting means 22 on a back swing side of a ball hitting corresponding part are provided, and a time when it is detected that a ball hitting club C moves to the back swing side before the time going back by a set time from the ball hitting corresponding time, and also, finally is discriminated as a start time of the ball hitting.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a platform on which a test subject is placed while holding a ball-hitting tool and making a ball-striking motion, a measuring device for measuring the load or center of load applied to the platform, and measurement information of the measuring device for a certain period of time. a storage means for sequentially storing data sampled at each time; a determination means for determining stored information during a batting action based on the stored information of the storage means; and outputting stored information during a batting action from the determining means. The present invention relates to a ball batting motion training machine provided with an output means.

0002

2. Description of the Related Art Such a ball-striking motion training machine is used, for example, for practicing ball-striking motions in golf, batting, and the like. In other words, in practicing these ball-hitting motions, the key to forming a correct ball-hitting motion is whether or not the center of load is moving correctly with the ball-hitting motion, or whether the load is changing correctly during the ball-hitting motion. It is well known that it is an important indicator of Therefore, by measuring the load or center of load during the ball-hitting motion and outputting it, the quality of the ball-hitting motion can be checked. Incidentally, in order to output the stored information during the ball-striking action using an output means such as a display, it is necessary to specify the starting point of the ball-striking action. For this reason, conventionally, a ball-hitting tool detection means is provided to detect that the ball-hitting tool has moved toward the backswing side at a specific location on the backswing side than the location corresponding to the ball. The device is configured such that if movement of the ball hitting tool toward the backswing side is detected even once, it is determined that the ball hitting motion has started. (For example, see Japanese Patent Application No. 1-189118)

00
03]

[Problems to be Solved by the Invention] With the above-described conventional means, the starting point of the ball-hitting motion may not be properly determined, and an improvement has been desired. In other words, using the golf ball-striking motion as an example, when the subject starts the ball-striking motion, he or she often makes a so-called waffling motion, rocking the tip of the club that serves as the ball-striking tool from side to side in order to relieve tension. . At this time, the ball-hitting tool detecting means unnecessarily detects movement of the club toward the backswing side, and the ball-striking motion is determined to be starting even though the ball-striking motion has not actually started. the result,
In addition to the information during the original batting operation, the memory information output by the output means also includes information during waffling.For example, the display as the output means shows the movement of the center of load. When displaying the trajectory, the movement trajectory of the load center during waffling is also displayed unnecessarily and becomes difficult to see, making it difficult to judge the quality of the batting action from the display results of the output means. There was a point. In order to avoid this problem, the subject needs to refrain from waffling, but in this case it becomes difficult for the subject to perform a natural batting motion, making it difficult to practice well. Incidentally, the above-mentioned problem is not limited to practice of hitting a ball in golf, but also applies to batting practice in baseball.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to reliably detect the start point of the actual ball-striking motion even if the subject performs a motion preceding the ball-striking motion, such as a waffle motion. Therefore, it is an object of the present invention to provide a ball batting motion training machine that appropriately outputs only stored information during the ball batting motion.

[0005]

[Means for Solving the Problems] The ball batting motion training device of the present invention includes a table on which a test subject who holds a ball batting tool and performs a ball batting motion is placed, a measuring means for measuring the load or the center of load applied to the table, and a measuring device for measuring the load applied to the table or the center of the load. A storage means for sampling measurement information of the means at fixed time intervals and sequentially storing the data, a determination means for determining stored information during a ball-striking motion based on the stored information of the storage means, and a ball-striking motion from the determination means. The first characteristic configuration is that the ball hitting tool has moved toward the backswing side at a specific location that is closer to the backswing than the location corresponding to the ball. A ball-hitting tool detection means for detecting a ball-hitting tool, and a ball-hitting time detection means for detecting a time point corresponding to a ball-hitting ball during a ball-hitting operation are provided, and the determining means, based on the information of the ball-hitting tool detection means and the ball-hitting time detection means, The time is before the time when the set time is traced back from the time corresponding to the batted ball, and
Finally, the point in time is that the point in time when it is detected that the ball hitting tool has moved toward the backswing side at the specific location is determined as the starting point of the ball hitting motion.

The second and third characteristic configurations specify preferred specific configurations for implementing the first characteristic configuration, and the details are as follows. That is, the second characteristic configuration is that the ball-hitting time detection means is constituted by a ball detection sensor that detects the presence or absence of a ball placed on the mounting tool at the location corresponding to the ball-hitting ball.

[0007] A third characteristic configuration is such that the ball-hitting time detection means estimates, based on the data from the measuring means, a time point at which the maximum load appears during the ball-hitting operation or a point in the vicinity thereof as the time point corresponding to the ball-hitting ball. The point is that it is structured as follows.

[0008]

[Operation] According to the first characteristic configuration, the ball hitting tool detection means:
Movement of the ball hitting tool toward the backswing side is detected, including movement that precedes the ball hitting motion, such as waffling. The determining means selects from among the detection information regarding the movement of the ball hitting tool toward the backswing side, a time earlier than a set time from the time corresponding to the batted ball detected by the batting ball time detecting means,
In addition, the last time the ball hitting tool moves toward the backswing side is determined, and that time is determined as the start time of the ball hitting motion. As a result, the starting point of the actual ball-hitting motion can be accurately determined.

According to the second feature, the ball detecting sensor constituting the ball hitting time detection means detects the time corresponding to the hitting ball based on the presence or absence of a ball on the mounting device.

According to the third characteristic configuration, the ball-hitting time detection means determines the time point at which the maximum load appears during the ball-hitting operation or its vicinity as the time equivalent to the ball-hitting time, based on the data from the measuring means for measuring the load or the center of the load. presume.

[0011]

Effects of the Invention According to the first characteristic configuration, even if the subject practices with a natural ball-striking motion accompanied by a movement that precedes the ball-striking motion, such as waffling, the ball can be hit by accurately determining the starting point of the ball-striking motion. Only the stored information during operation can be appropriately output. According to the second characteristic configuration, the ball hitting time detection means can be easily configured using only the ball detection sensor. According to the third characteristic configuration, there is no need for a special sensor to detect the timing of hitting the ball.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the ball-striking motion training machine of the present invention is applied to a golf swing training machine will be described below with reference to the drawings. In FIGS. 1, 2, and 3, 1 is a load measuring device, 2 is a tea stand, 3 is a processing device, and 4 is a display device as an output means. The golf swing training machine of this example is
The data measured by the load measuring device 1 during the ball-hitting operation is processed by the processing device 3, stored temporarily as load or load-centered time-series data, and displayed after the ball-hitting operation is completed. Explain.

The load measuring device 1 includes four load cells 12.
, 13, 14, and 15, and a table 11 is provided with its four corners supported by the test subject, and on the table 11, a subject holds a club C as a ball hitting tool and performs a ball hitting motion. At this time,
The load applied to the stand 11 is the load of four load cells 12, 13, 1
4 and 15, and the load and load center are determined from these outputs as described later. Further, a mounting tool 25 for mounting a ball 24 is attached to the tee stand 2. A light receiver 21A is provided on the front side across the club head path from the position where the ball 24 is set, and a corresponding light emitter 21B is provided on the other side, and these function as a ball hitting time detection means 21 for detecting the presence or absence of the ball 24. . Further, at the club head passing position on the backswing side, there is provided a hitting tool detecting means 22, which includes a light receiver 22A and a light emitter 22B and detects movement of the club toward the backswing side, which are installed in the same manner as described above. The control box 26 incorporates drive circuits for the ball hitting time detection means 21 and the ball hitting tool detection means 22. Furthermore, a reset switch 23 is provided that can be pressed with the head of the club C held by the subject.

Next, the process of determining the load and the center of load will be explained. The subject holding the club C stands approximately in the center of the table 11 on the load measuring device 1 and takes a stance. Load cells 12, 13, 14 at the four corners of the load measuring device 1,
For the outputs of 15 and 15, the table loads have been canceled in advance by zero adjustment in the load converter 16, so the output W
The total WT of 1, W2, W3, and W4 becomes the load of the subject sitting on the platform 11. That is, WT=W1+W2+W3+W4 Furthermore, at this time, the shared output of each load cell differs depending on the relationship between the position where the load is applied and the installation position of the four load cells 12 to 15, so the load center (X, Y) is determined from these outputs. be able to. That is, when the four load cells 12 to 15 are placed exactly at the four corners of a square, the left-right component X and the front-back component Y of the load center expressed with the load cell 12 in FIG. 1 as the origin are:
It can be determined from X=(W2+W3)/WT Y=(W3+W4)/WT. In addition, load cells 12, 13,
Even if 14 and 15 are not located at the four corners of a square, the center of load can be determined by making corrections specific to the geometrical arrangement of the load cells. Further, if three or more load cells are provided, the center of the load applied to the table 11 can be determined.

As shown in FIG. 3, four load cells 12 to
Each of the outputs W1 to W4 of 15 is a load converter 16 equipped with a measurement bridge circuit and an A/D converter, and after compensating for the weight of the table 11 as described above, is sampled at fixed time intervals and becomes a digital quantity. . Then, the data is sequentially taken into the processing device 3 via the I/O interface 32. The subject's load WT and load center (X, Y) are determined by the arithmetic processing means 31 in the processing device 3 according to the above-mentioned formula. The obtained load and load center time series data are temporarily stored in the storage device 33 as a storage means. Therefore, four load cells 12 to 15, a load converter 16, an I/
The O interface 32 and the arithmetic processing means 31 are mounted on the stand 11.
It functions as a measuring means S for measuring the load applied to or the center of load.

After the ball-hitting motion is completed, the data stored in the storage device 33 is outputted to the display device 4 via the arithmetic processing means 31 functioning as the determining means O and the I/O interface 32, and the subject can perform the ball-striking motion. You can see changes in the load inside and the locus of the load center. The display device 4 includes a graphic display device 41 that displays the locus of the load center (X, Y) and a plotter 42 that outputs the change over time of the load WT. However, conversely, it is also possible to output the locus of the load center (X, Y) to the plotter 42 or to display the temporal change in the load WT on the graphic display device 41. In either case, the load and load center time series data stored in the storage device 33 are interpolated and displayed as a continuous curve. As described above, the locus of the center of the load in the ball-hitting motion and the change in load over time are displayed, and the quality of the ball-hitting motion is determined. When the subject performs consecutive ball-hitting motions, the subject presses the reset switch 23 with the head of the club C to clear the stored data in the storage device 33 and the display on the display device 4 before starting the next ball-hitting motion.

Next, a method for storing time series data of the load WT and the load center (X, Y) in the storage device 33 will be explained. As shown in FIG. 4, the storage device 33 is divided into eight independent storage sections, each of which stores the load WT, the X component of the load center, and the Y component of the load center, respectively, before the time corresponding to the batted ball. Three storage units 33A, 33B, and 33C, and three storage units 33D and 3 that store the load WT, the X component of the load center, and the Y component of the load center after the time equivalent to the ball hit, respectively.
3E, 33F, and two pieces that sample and store the detection information of the hitting tool detection means 22 and the detection information of the hitting time detection means 21 before the time corresponding to the hitting ball in synchronization with the above-mentioned load or load center sampling data, respectively. It consists of storage units 33G and 33H. Five storage units 33A, 33B, 33C, 33G that store data before the time corresponding to the batted ball
, 33H is its storage capacity, sampling time and 1
Set time (T) determined by the number of storage units required to store data
0) minutes of data can be stored. Then, the new data is stored one by one while discarding the old data one by one.
The configuration is such that updating of this data is stopped at the point corresponding to the ball being hit. That is, data for a set time (T0) up to the time corresponding to the ball hitting operation is stored. In addition, the three storage units 33D, 33E, and 33F that store data after the point corresponding to the batted ball store data for a set time (T1) determined by the storage capacity, sampling time, and number of storage units required to store one data. , and is configured to start storing from the time corresponding to the batted ball and sequentially store until the time T1 has elapsed.

The determining means O determines the stored information during the ball batting operation based on the stored information in the storage device 33.Next, based on FIG. A method for determining the start point of a ball hitting motion from among the information will be explained. First, the data in the storage section 33H of detection information of the ball-hitting time detection means 21 is sequentially searched to find the storage position PO of data indicating the time corresponding to the ball-hitting ball. Next, the data in the storage unit 33G of the detection information of the hitting tool detecting means 22 is sequentially searched in the backward direction from the storage position P0 of the data corresponding to the batted ball by a set time T2, and In the search direction, the data in which the ball hitting tool detection means 22 first detects the movement of the club C toward the backswing side appears, that is, as a time lapse, the ball hitting tool detection means 22
Finds the storage position P1 at the time when the last movement of the club C toward the backswing side was detected. The determining means O determines this storage position P1 as data at the start of the ball batting motion. Note that the reason why the data is traced back by the set time T2 from the storage position P0 at the point corresponding to the time when the ball is hit is because the ball hitting tool detection means 22 detects the movement of the club C immediately before the time corresponding to the time when the ball is hit, and the value of T2 is 100 mS. The degree is appropriate, but it can be changed as necessary. In the above manner, the discriminating means O
The start point of the ball-hitting motion is determined, and the stored information during the ball-hitting motion is output, and the display device 4 performs display based on the output information.

[Another Embodiment] When storing the detection information of the ball-hitting time detection means 21 and the ball-hitting tool detection means 22, the ball-hitting time detection means 21 detects a time corresponding to a ball-hitting ball in addition to what is shown in the above embodiment. The storage position itself at the time when the hitting tool C detects the movement of the hitting tool C toward the backswing side may be stored as data.
Alternatively, instead of providing the storage sections 33G and 33H, a storage section is provided that stores sampling data of the load or the load center at the time when the ball hitting tool detection means 22 or the ball hitting time detection means 21 detects the movement of the ball hitting tool or the time point corresponding to the ball hitting. 33A, 33B
Alternatively, data that can be clearly distinguished from other data (for example, the number 0) may be written in 33C. Further, the structure of the storage section may not be divided into parts before and after the time corresponding to the ball hit as in the above embodiment, but may be formed as an integrated structure. Furthermore, as the hitting point detection means 21, a mounting tool 2 is used instead of the combination of the light receiver 21A and the light emitter 21B.
A reflective sensor may be provided inside the ball 5 to detect the presence or absence of the ball 24.

In addition to the above-mentioned embodiments, the ball-hitting time detection means 21 can also be realized by determining the time point at which the load becomes maximum during the ball-hitting operation or a point in the vicinity thereof from data stored in the storage device 33. can.

[0021] Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Fig. 1] A plan view of a golf swing training machine to which the present invention is applied.

[Figure 2] Same side view

[Figure 3] Block diagram

[Figure 4] Configuration diagram of the storage device

[Explanation of symbols]

4 Output means 11 units 21. Hitting point detection means 22 Batting tool detection means 24 Ball 25 Mounting tool 33 Memory means C Ball hitting tool O Discrimination means S Measurement means

Claims (3)

[Claims] Claim 1: A stand (11) on which a test subject is placed while gripping a ball hitting tool (C) and makes a ball hitting action, a measuring means (S) for measuring the load or load center applied to the stand (11), and the measuring means. (S) storage means (33) that samples the measurement information at regular time intervals and stores the data sequentially; and determination means (O) that determines the stored information during the ball batting operation from the stored information of the storage means (33). and an output means (4) for outputting the stored information during the batting motion from the discriminating means (O), the batting motion training machine is provided with: The ball hitting tool (C
) is provided with a ball hitting tool detecting means (22) for detecting that the ball has moved to the backswing side, and a ball hitting time detecting means (21) for detecting a time point corresponding to a batted ball during a ball batting operation, and the determining means (O) , based on the information of the ball hitting tool detection means (22) and the ball hitting time detection means (21), before the time when the set time is traced back from the time corresponding to the batted ball,
Further, the ball batting motion training device is configured to determine the time point at which it is detected that the ball batting tool (C) has finally moved to the backswing side at the specific location as the starting time point of the ball batting motion. 2. The ball batting motion training machine according to claim 1, wherein the ball batting time detection means (21) detects the presence or absence of a ball (24) placed on the mounting device (25) at a location corresponding to the batted ball. A ball batting motion practice device that is comprised of a ball detection sensor. 3. The ball batting motion training machine according to claim 1, wherein the ball batting time detection means (21) comprises the measuring means (21).
A ball batting motion training device configured to estimate a time point at which the maximum load appears during the ball batting motion or a time point near the time point as the time point corresponding to the batting ball based on the data from S).