JPH0663209A - Ball hitting action training machine - Google Patents

Abstract

PURPOSE:To precisely judge the degree of ball hitting action stability by a method wherein loads during the ball hitting actions are detected and stored in time series so that dispersion of the actions are detected based on the detection result in a plurality of ball hitting actions to determined the degree of stability of the actions, thereby displaying this degree of stability. CONSTITUTION:A swing base 1 is constituted from load detecting bases 10, 11 each of which comprises four load cells 12-15, 16-19. And the whole body, load on the right and left foot, and center of load of a person to be tested who conducts ball hitting actions on the base 1 are measured so that these data are inputted into a processing device 3. The measurement of load is conducted in time series and stored as time series data and at the same time the data are displayed on a display means 4. And the device 3 computes the dispersion in a plurality of ball hitting actions based on the result of the load measurement in a plurality of ball hitting actions to determined the stability. That is, the smaller the dispersion, the higher the stability is decided and the stability is displayed on the display means 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing table on which a subject who holds a hitting ball and hits is placed, a load measuring means for measuring the load or the center of load of the entire body of the subject, or the left and right feet, and a hitting ball. The present invention relates to a ball hitting practice machine provided with a control means for storing the measurement result of the load measuring means during operation as time series data and outputting the stored measurement result to a display means.

[0002]

2. Description of the Related Art Such a ball hitting practice machine is used for practicing ball hitting motions (hereinafter also referred to as swings) such as golf and batting. It is well known that in the practice of these swings, whether the load of the whole body or the left and right feet or the movement of the load center is properly performed along with the swing is an important index for forming a correct swing form. ing. There are generally two aspects to swing form evaluation. One is to check the differences compared to the ideal form.
The other is to perform swings multiple times and check the stability of the swing form based on the size of the variations. The latter is especially important when the form has solidified to some extent. Therefore, as a device capable of performing a plurality of swings and checking the stability of the swing form from the size of the variation, there is, for example, a hitting ball practice machine proposed by the present applicant in Japanese Patent Laid-Open No. 2-243637. In this ball-hit action training machine, the load or center of load of the entire body or the left and right feet during a swing is measured, and the sampled data is sequentially stored in a storage device.
Then, after the swing is completed, the storage information stored in the storage device is output to the display device as load time series data or a locus of the load center. Further, the load data or the load center data at the characteristic evaluation points of each of the plurality of swings is displayed on the display device together with the time series data of the load or the trajectory of the load center. Therefore, in this ball-hit motion practice machine, the stability of the swing form at the characteristic evaluation points, the amount of variation in the load data or the load center data at the characteristic evaluation points of each of the plurality of swings displayed on the display device, For example, if a plurality of load center data points at the displayed characteristic evaluation points are concentrated in one place, the swing form at that characteristic evaluation point is stable, and if scattered, it is unstable. As described above, the stability at the feature evaluation point was judged sensuously.

[0003]

Therefore, in the above-mentioned conventional example, in judging the stability at the characteristic evaluation point, it is sensible to see the variation amount of a plurality of data points at the characteristic evaluation point displayed on the display device. Therefore, it was only possible to roughly judge the amount of variation in the points of a plurality of data. For this reason, there is a problem that the stability of the ball striking motion cannot be accurately discriminated because the criterion is ambiguous. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ball hitting practice machine capable of accurately determining the stability of a ball hitting motion.

[0004]

A ball hitting practice machine of the present invention measures a swing table on which a subject who holds a ball hitting tool and makes a ball hitting motion rests, and the load or load center of the entire body of the subject or each of the left and right feet. A load measuring means for storing the measurement result of the load measuring means during the ball striking operation as time series data, and a control means for outputting the stored measurement result to the display means, The first characteristic configuration is detected by the variation amount detecting means for detecting the variation amount of the multiple ball hitting movements and the variation amount detecting means based on the measurement result of the load measuring means in the multiple ball hitting movements. Based on the variation amount, the stability determination means for determining the stability of the ball hitting motion as the variation amount decreases is provided, and the control means forwards the determination result of the stability determination means. In that it is configured to output to the display unit. The second characteristic structure is the ball hitting practice machine of the first characteristic structure, wherein the variation amount detecting means is
From each of the measurement results of the load measuring means in a plurality of ball striking motions, the measurement result of the characteristic evaluation points for each of the ball striking motions is extracted, and the variation amount of the measurement result of the extracted characteristic evaluation points is detected. It is in the point that is configured. The third characteristic configuration is, in the ball hitting practice machine of the second characteristic configuration, the variation amount detecting means extracts a load center of the feature evaluation points from a measurement result of the load center, and the extracted feature evaluation points. From the plurality of load centers, the distance between the average load center and each load center is obtained, and the average value of the obtained plurality of distances is detected as a variation amount. . According to a fourth characteristic configuration, in the ball hitting practice machine according to the second characteristic configuration, the variation amount detecting means extracts a load center of the feature evaluation points from a measurement result of the load center, and the extracted feature evaluation points. It is configured to detect the amount of variation in the left-right direction and the front-back direction of the subject from the plurality of load centers. According to a fifth characteristic configuration, in the ball hitting practice machine having the second, third or fourth characteristic structure, the variation amount detecting means detects each ball hitting from each of the measurement results of the load measuring means in a plurality of ball hitting operations. The measurement results of the characteristic evaluation points at a plurality of points for each operation are extracted, and the amount of variation for each of the characteristic evaluation points at a plurality of points is detected from the measurement results of the extracted characteristic evaluation points at the plurality of points, and the stability is determined. Discrimination means discriminates the stability at each of the characteristic evaluation points at the plurality of locations, and the control means discriminates the location having the lowest stability among the discrimination results at the plurality of locations discriminated by the stability discrimination means. The result is configured to be output to the display means. According to a sixth characteristic configuration, in the ball-hit motion practice machine according to the first characteristic structure, the variation amount detecting means determines a plurality of positions for each ball-hit motion based on the measurement results of the load measuring means in a plurality of ball-hit motions. The elapsed time between the characteristic evaluation points of
The point is that the variation amount of the elapsed time between the obtained characteristic evaluation points is detected.

[0005]

According to the first characteristic configuration, the variation amount in a plurality of ball striking operations is detected, and the stability of the ball striking operation is determined to be higher as the variation amount is smaller based on the variation amount, and the determined stability is determined. The degree is output to the display device.
According to the second characteristic configuration, the variation amount detecting means in the first characteristic configuration detects the variation amount at this characteristic evaluation point from the measurement result of the characteristic evaluation point for each hitting motion. The above-mentioned characteristic evaluation point means a point characteristically representing a ball hitting action, in other words, an important point in hitting ball action, for example, a ball hitting point at which the ball hitting tool hits the ball or a top position time point at which the back swing moves to a forward swing. Etc., one or more points are set. According to the third characteristic configuration, the variation amount detecting means in the second characteristic configuration obtains the distance between each of the load centers and the average load center of the plurality of load centers at the feature evaluation point, and the variation is obtained from the average value of the distances. Detect the amount. According to the fourth characteristic configuration, the variation amount detecting unit in the second characteristic configuration detects the variation amount in the left-right direction or the variation amount in the front-back direction of the subject at the load evaluation center at the feature evaluation point. According to the fifth characteristic configuration, the second, third or fourth
The control unit in the characteristic configuration outputs the stability of the characteristic evaluation point having the lowest stability among the plurality of characteristic evaluation points to the display device. According to the sixth characteristic configuration, the variation amount detecting means in the first characteristic configuration detects the variation amount of the elapsed time between the characteristic evaluation points in a plurality of ball hitting motions.

[0006]

According to the first characteristic configuration, the variation amount of data in a plurality of ball hitting operations is quantitatively detected, and the stability of the ball hitting operation is determined based on this variation amount. It is possible to provide a ball hitting exercise practice machine that can accurately determine the stability. According to the second feature configuration, the variation amount of the ball hitting motion at the feature evaluation point is detected, and the stability of the ball hitting motion at the feature evaluation point is output to the display device based on the variation amount. Therefore, the ball hitting at the feature evaluation point is performed. It is possible to provide a hitting ball practice machine that can accurately determine the stability of the motion. According to the third feature configuration, the variation amount of the ball hitting motion at the feature evaluation point is detected from the average value of the average load centers of the plurality of load centers at the feature evaluation point and the respective distances of the respective load centers. Since the stability at the feature evaluation point is quantitatively determined based on the average value, the stability of the ball hitting motion at the feature evaluation point can always be determined by a constant reference. It is possible to provide a batting motion practice machine capable of more accurately determining stability. According to the fourth feature configuration, the variation amount in the left-right direction or the variation amount in the front-rear direction of the subject at the load center at the feature evaluation point is detected, and based on the variation amount, the left-right direction of the subject in the ball hitting motion at the feature evaluation point or Since the stability in the front-rear direction is quantitatively determined, it is possible to provide a ball-hit motion practice machine capable of accurately determining the stability of the ball-hit motion at the feature evaluation point in the left-right direction or the front-rear direction of the subject. According to the fifth feature configuration, the stability of the feature evaluation point having the lowest stability among the stability of the plurality of feature evaluation points is displayed. Therefore, the feature evaluation point having the lowest stability is extracted and stabilized. I was able to evaluate the degree and became more convenient. According to the sixth characteristic configuration, the variation amount of the elapsed time between the characteristic evaluation points is detected, for example, from the top position time point to the hitting time point, and the elapsed time period from the top position time point to the hitting time point is detected based on this variation amount. Since the stability of is evaluated quantitatively, it is possible to provide a batting motion practice machine capable of accurately determining the stability of the elapsed time between the feature evaluation points.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the hitting ball practice machine of the present invention is applied to a golf practice machine will be described below with reference to the drawings.
1, 2 and 3, 1 is a swing table, 2 is a tea stand, 3 is a processing device, and 4 is a display device as a display means. During the swing, the golf training machine of the present embodiment processes the detection data of the load detection sensor D provided on the swing base 1 by the processing device 3 to display the load center on the display device in real time, and The data is temporarily stored as time-series data centered on the load, the stored data is displayed after the swing is completed, and further, the stability of the swing is discriminated based on a plurality of swing data in the past. Each device will be described.

The swing base 1 comprises two load measuring bases 10 and 11 corresponding to the left and right feet respectively.
Is the four load cells 12, 1 as the load detection sensor D
The four corners are supported by 3, 14, 15 and the load measuring table 11 is supported by the four load cells 16, 17, 18, 19 as the load detection sensor D at the four corners. On the swing table 1, the subject holding the club C swings. At this time, the load applied to the swing base 1 is shared by the eight load cells 12 to 19 supporting the two load measurement bases 10 and 11, and from these outputs, the load of the subject and the load center, as described later, Further, the load and the load center corresponding to each of the left and right feet of the subject are obtained.

A mounting tool 25 for mounting a ball 24 is mounted on the tea stand 2. Further, a first reflective optical sensor 21 as a ball presence detecting means for detecting the presence or absence of the ball 24 is provided on the opposite side of the club head passage at the position where the ball 24 is set, and the first reflective optical sensor is provided. A second reflection type optical sensor 22 as a club head detecting means for detecting the presence or absence of the club head is provided at a position close to the backswing side of 21. The control box 26 incorporates drive circuits for the first and second reflective photosensors 21 and 22. Further, the detection result of the first reflection type optical sensor 21 is
The time point at which the ball presence detection state is changed to the ball non-existence state is determined as the hitting ball equivalent time point. The processing device 3 includes an arithmetic device 31 for performing arithmetic processing for obtaining a load and a load center, sequence control of the device, and the like.
I / O interface 3 for passing various data
2. Storage device 33 as storage means for storing load and load center measurement information, console 34 for selecting the operation mode of the device and inputting various comments, and external storage device 35 for storing measurement information and the like. Etc. The display device 4 includes a graphic display device 41 and a plotter 42. The graphic display device 41 displays a two-dimensional locus of the load center and the plotter 42 displays a time change of the load.
Note that the storage area of the storage device 33 is divided into a first area in which data before hitting ball equivalent time is stored and a second area in which data after hitting ball equivalent time is stored in terms of software processing. The storage capacities of the first area and the second area are set to their respective set capacities. When the first area overflows, the old data is sequentially discarded, and when the second area overflows, the storage is stopped. Is configured to.

Next, a process in which the arithmetic unit 31 obtains a load and a load center will be described. The test subject who holds the club C stands and stands in the center of the swing table 1 with the left and right feet on the two load measurement tables 10 and 11, respectively. The load measuring table 10 on which the subject places his left foot will be described as an example. The outputs of the load cells 12, 13, 14, 15 at the four corners of the load measuring table 10 are adjusted in advance by zero adjustment in the load converter 100. Since the loads have been canceled out, the total WL of the outputs W1, W2, W3, W4 becomes the load of the left foot of the subject on the load measuring table 10. That is, WL = W1 + W2 + W3 + W4 Further, at this time, the position where the load is applied and the four load cells 1
Since the shared output of each load cell differs depending on the relationship with the installation positions of 2 to 15, the load center of the load applied to the load measuring table 10 can be obtained from these outputs. That is, the load component 12 in the left-right direction and the front-rear direction component Y expressed with the load cell 12 in FIG. 1 as the origin is a rectangle in which the four load cells 12 to 15 have a width a in the X direction and a width b in the Y direction. When it is arranged at the four corners of the load measuring table 10 of, it can be obtained from X = (W2 + W3) × a / WL Y = (W3 + W4) × b / WL. In addition, the load cells 12, 13,
Even when the arrangements of 14 and 15 are not at the four corners of the rectangle, the load center can be obtained by performing the correction unique to the geometrical arrangement of the load cells. If three or more load cells are arranged, the center of the load applied to the swing table 1 can be obtained. The load measuring table 11 on which the subject places his right foot has the same configuration as the load measuring device 10,
Similarly to the above, the load center of the load applied to the load measuring table 11 can be obtained. That is, the load centers corresponding to the left and right feet of the subject can be obtained.

As for the load and center of load of both legs of the subject, that is, the whole body, the load applied to the load measuring table 11 is W.
If it is R, as in the case of the left foot above, the load cell 16
From the outputs W5 to W8 of ~ 19, WR = W5 + W6 + W7 + W8, the load WT of the whole body is obtained by WT = WL + WR, and the load center is the distance between the load center corresponding to the left foot and the load center corresponding to the right foot of the subject. If it is L, it is located at a position WR × L / WT away from the load center corresponding to the left foot on the line segment connecting the left and right load centers, and this can be calculated.

As shown in FIG. 3, eight load cells 12 ...
Outputs W1 to W4 and W5 to W8 of 15 and 16 to 19
Is a load converter 100 equipped with a measurement bridge circuit and an A / D converter, and after compensating for the weight of the swing table 1 as described above, it is sampled at regular intervals and becomes a digital quantity. Then, it is sequentially loaded into the processing device 3 via the I / O interface 32. The load or the load center of the entire body of the subject or each of the left and right feet is calculated by the arithmetic unit 31 in the processing device 3 according to the above-described formula. And
The obtained load or load center of the entire body of the subject or each of the left and right feet is displayed on the graphic display device 41 of the display device 4 in real time. Further, during the period from the detection of the presence of the sphere 24 by the first reflective optical sensor 21 to the lapse of a set time after the detection of the absence of the sphere 24, the obtained whole body of the subject or the left and right feet of The load or the time-series data of the load center is stored in the storage device 33. Then, together with these time-series data, time-series data of the detection information of the first reflection type optical sensor 21 and the second reflection type optical sensor 22, the load center corresponding to each of the left and right feet of the subject at the time of address, and the body of the subject. The load center corresponding to the whole body, the load center corresponding to the whole body at the body turn start point, the load center corresponding to the whole body at the time of the top position, the load center corresponding to the whole body at the swing-down point, the whole body at the time of hitting the ball The corresponding load center and the load center corresponding to the entire body at the finish point are also stored in the storage device 33. Each load center at the time of address is obtained by averaging the positions of the load centers before the swing start point detected as described later.

Next, a process in which the second reflective photosensor 22 and the arithmetic unit 31 detect the swing start point of the subject will be described. In the storage device 33, information on whether or not the second reflection type optical sensor 22 has detected the passage of the club head is stored in time series in addition to the data on the load and the load center. Based on this stored information, the computing device 31 swings the time point when the first second reflective photosensor 22 detects the passage of the club head by tracing back the time from the hitting time, excluding the time of about 100 mS immediately before the hitting time. Detect as starting point.

Next, the process in which the arithmetic unit 31 detects the body turn start point will be described. Of the load and load center data obtained by the computing device 31 as described above and stored in the storage device 33, the time change of the load on the lower leg of the subject in the backswing direction shown in FIG. 4, that is, the present embodiment. In the above, the device configuration for a right-handed test subject is illustrated. Therefore, in the time change 90 of the load on the right leg, the peak that appears first when the search is started from the data corresponding to the swing start point indicated by point A in FIG. The position of the point B on the time axis is detected as the body turn start point.

Next, a process in which the arithmetic unit 31 detects the top position time point will be described. The component in the left-right direction, that is, the X direction, of the load-series time series data corresponding to the entire body of the subject, which is obtained by the arithmetic unit 31 as described above and stored in the storage device 33, is time-differentiated to obtain the load-center X-value. The time change of the moving speed in the direction is calculated. In the time change of the moving speed in the X direction illustrated in FIG. 5, a point E in FIG.
The point W, which is traced back a predetermined time from the data at the time of hitting the ball detected by the first reflection type optical sensor 21 for detecting the presence or absence of the sphere, is set as a reference time, and the data is traced in the direction backward from the point F indicating the reference time. By searching, the point G at which the sign of the moving speed in the X direction first reverses from negative to positive, that is, the direction of the moving speed in the X direction first reverses is detected as the top position time point. In addition, from the point V indicating the hitting time to the reference point W
The time interval up to is to prevent erroneous detection of the case where the direction of the moving speed may face the backswing direction immediately before the time of hitting as the top position time, and this time interval is 200 mS. The degree is appropriate.

Next, a process in which the arithmetic unit 31 detects a swing-down point will be described. Of the data stored in the storage device 33 obtained by the arithmetic device 31 as described above,
In the time change 90 of the right foot load and the time change 91 of the left foot load shown in FIG. 4, from the point H indicating the top position time point obtained as described above to the point I indicating the hitting time point detected by the first reflective optical sensor 21. Corresponds to a downswing. During this downswing, from the point J indicating the time point when the load of the left and right feet of the subject becomes equal, t is on the side where time elapses and t ′ is on the side that goes back time, and the foot on the upper side in the downswing direction The rate of change of the load on the right foot, that is, the time differential value is calculated. It is suitable that both the time widths t and t'are about 50 mS. The point K indicating the time point when the absolute value of the change rate of the time change 90 of the right foot load becomes the minimum value is detected as the swing-down point.

If the change from the sphere presence detection state of the first reflective photosensor 21 to the sphere absence detection state is due to an appropriate swing, the processing device 3 causes the storage device 3 to operate.
The data stored in 3 is output to the display device 4, and
The data stored in the storage device 33 is configured to be stored in the data storage area of the storage device 33. Therefore, as described above, the processing device 3 displays the measurement result of the load measuring means S and the data stored in the storage device 33 on the display device 4.
It functions as the control means U for outputting to.

The determination method for determining whether or not the change from the sphere presence detection state of the first reflection type optical sensor 21 to the sphere absence detection state is an appropriate change due to an appropriate swing is as follows. It is configured. Based on the detection information of the first reflection type optical sensor 21 and the second reflection type optical sensor 22 stored in the storage device 33, the first reflection type optical sensor 21 has changed from the sphere presence detection state to the sphere absence detection state. From time to time, the time when the club head traces the passage time (about 2 ms) required for the club head to pass between the detection range of the second reflective optical sensor 22 and the position of the ball 24 when making an appropriate swing Then, a set time (100 ms) set based on the reference time point and the time required for the club head to move from the detection range to the backswing side and then return to the detection range when an appropriate swing is made. When the second reflection type optical sensor 22 does not detect the club head between the time point and the time point that goes back from the reference time point, it is determined that the change is an appropriate change due to an appropriate swing. It is configured.

Next, based on the data stored in the data storage area of the storage device 33 in a plurality of swings,
The computing device 31 detects the variation amount of the load center at each characteristic evaluation point (body turn start point, top position time point, swinging down point, hitting time point, finish point) of each swing, and uses the detected variation amount. Based on this, the stability of the swing at each feature evaluation point is determined such that the smaller the amount of variation, the higher the stability. Accordingly, the arithmetic unit 31 includes a variation amount detecting means E for detecting the variation amount of the measurement result of the characteristic evaluation points and a stability determining means F for determining the stability of the characteristic evaluation points.
Function as.

Hereinafter, a method of discriminating the variation amount detecting means E and a method of discriminating the stability discriminating means F will be described.
First, the variation amount detecting means E includes the characteristics of each of the latest multiple times (about 5 times) of the data of the load center of the entire body of the subject stored in the data storage area of the storage device 33. Data of the load center at the evaluation points is extracted, the average load center of the extracted data of the load centers of 5 times is obtained for each feature evaluation point, and the distance between the average load center and each load center is obtained. Further, the average value of the obtained distances is detected as the variation amount. The stability determining means F sets the average value of the distances obtained by the variation detecting means E to 1
Classify as rank 0. The ten ranks are configured to be classified into ranks having a larger average value of the distances obtained by the variation detecting means E, that is, a larger variation amount, which is a smaller value. Further, when the classified rank is 3 or less, the stability determination means F determines the deviation Δx in the X direction (left and right direction of the subject) and the Y direction (back and forth direction of the subject) of the data of the load center of the above 5 times. ) Is obtained, and the amount of variation in the left-right direction and the front-back direction of the subject is detected from the deviations Δx and Δy.

Next, the processing device 3 as the control means U for controlling the display of the display device 4 determines the stability of the lowest stability part among the stability of the swing at the plurality of feature evaluation points. Output to the display device 4. That is, among the respective characteristic evaluation points, the characteristic evaluation point having the smallest rank is displayed as shown in FIG.
Furthermore, when the rank of stability of the displayed feature evaluation points is 3 or less, a comment corresponding to the following Expression 1 is displayed together from the deviations Δx and Δy.

[0022]

[Equation 1] (Δy / Δx)> 1.5 ………… Scatters before and after 1.5 ≧ (Δy / Δx) ≧ 0.5 ………… No comment (Δy / Δx) <0.5 In the load center locus 60 of the whole body in FIG. 9, the characteristic evaluation points indicating the stability are distinguished from the other characteristic evaluation points so that they can be distinguished from the other characteristic evaluation points. It is configured to be displayed with a mark (*) different from the mark. Furthermore, after displaying the stability of the place with the lowest stability, the characteristic evaluation points for displaying the stability are displayed. The operator console 34 is configured so that it can be changed and set.

The operation of the apparatus in use will be described below with reference to the flowchart of FIG. 6 and FIGS. 7 to 10. In the flowchart of FIG. 6, after turning on the power switch (not shown) to start the device,
The operator sets the operation mode of the device from the console 34. The operation modes include two modes, a reference trajectory display mode and a reference trajectory non-display mode. In the reference trajectory display mode, a load center two-dimensional trajectory corresponding to the entire body of the subject stored in the storage device 33 and a reference trajectory display mode. , The load center corresponding to each of the left and right feet of the subject at the time of address and the load center corresponding to the entire body of the subject are displayed on the graphic display device 41 during the swing, and are not displayed in the reference trajectory non-display mode. . When either one of these two modes is selected and the operation mode setting is completed,
If the operation mode is set to the reference trajectory non-display mode, the process proceeds to a position where the presence or absence of the ball 24 on the next mounting tool 25 is detected. If the reference locus display mode is set, a desired two-dimensional locus is selected as the reference locus 51 from the load-centered two-dimensional loci corresponding to the entire body of the subject stored in the storage device 33. Along with the reference locus 51, the load center corresponding to each of the left and right feet of the subject at the time of address is shown as a reference address point 52, and the load center corresponding to the whole body of the subject at the time of address is shown as a reference load center 53, which is shown in FIG. Graphic display device 41
After that, the process proceeds to the position where the presence or absence of the ball 24 on the mounting tool 25 is detected.

In the first reflection type optical sensor 21, the mounting tool 25 is used.
Detecting whether or not the sphere 24 is placed on the sphere 24,
When the load is not on the mounting tool 25, the detection data of the load detection sensor D is fetched and arithmetic processing is performed to obtain a load center corresponding to the entire body and a load center corresponding to each of the left and right feet, and the load of the left and right feet is calculated. Each of the center point 54 and the load center point 55 of the entire body is displayed on the graphic display device 41 as shown in FIG. 7, and the ratio of the load of each of the left and right feet to the total load (that is, WL / WT and WR / WT). ) Is obtained and displayed as ratio display points 57 so that the larger the ratio value is, the higher the ratio value is in the display columns 56 provided at the left and right ends of the display screen of the graphic display device 41. After performing this screen control, if the mode change switch of the console 34 is pressed, the operation returns to the state before the operation mode is set, and if not pressed, the operation returns to the position where the presence or absence of the ball 24 is detected.

When the ball 24 is placed on the placing tool 25, the stored data corresponding to the previous swing and the display data on the graphic display device 41 are cleared. After that, the detection data of the load detection sensor D is acquired, and the ratio of the load and the load center of the whole body, the load center corresponding to each of the left and right feet, and the load of each of the left and right feet to the total load is calculated. The calculation result is stored in the storage device 33 as the load center point 54 of the left and right feet, the load center point 55 of the whole body, and the ratio display point 57 as shown in FIG. To do. After this screen control, if the swing has not ended, the process returns to the detection data fetching position of the load detection sensor D.

If the swing is completed, that is, if the set time has elapsed from the time point corresponding to the hit ball, it is determined as described above whether or not the swing is an appropriate swing. If it is determined that the swing is improper, the data at this time is erased to return to the position where the presence or absence of the ball 24 is detected, and if it is determined that the swing is proper, each data at this time is stored in the data storage area of the storage device 33. As shown in FIG. 8, the load center two-dimensional locus 60 of the whole body, and the load center two-dimensional loci 61, 62 corresponding to the left and right feet respectively,
An address point 63 indicating the load center of the whole body at the time of address, an address point 64 indicating the load center of each of the left and right feet at the time of address, a swing start time point 65 on the two-dimensional trajectory 60, and a body turn start on the two-dimensional trajectory 60. The point 66, the top position time point 67 on the two-dimensional trajectory 60, the swing-down point 68 on the two-dimensional trajectory 60, the hitting time point 69 on the two-dimensional trajectory 60, and the finish point 70 on the two-dimensional trajectory 60 have already been displayed. It is displayed on the graphic display device 41 together with the reference trajectory. Then, as shown in FIG. 10, the plotter 4 obtains data on the change over time of the load on the entire body.
Display on 2. In the display of the time change of the load of the whole body, the swing start point 65 and the body turn start point 6
6, the top position time point 67, the swing-down point 68, the hitting time point 69, and the finish point 70 are displayed together with a mark 80 visually showing the respective states. The graphic display device 41 displays the data from the swing start point to the finish point, and the plotter 42 displays the data for a predetermined time before and after the hitting time.

Next, when the display of the stability is instructed on the console 34, the two-dimensional locus 60 of the load center of the whole body as shown in FIG. 9 and the address point indicating the load center of the whole body at the time of addressing. 63, an address point 64 indicating the load center of each of the left and right feet at the time of address, a swing start time point 65 on the two-dimensional trajectory 60, a body turn start point 66 on the two-dimensional trajectory 60, a top position time point on the two-dimensional trajectory 60 67, a swing-down point 68 on the two-dimensional trajectory 60, a hitting time point 69 on the two-dimensional trajectory 60, and a finish point 70 on the two-dimensional trajectory 60 are displayed. Furthermore, at each of the feature evaluation points including the body turn start point, the top position time point, the swing-down point, and the hitting time point, the data of the load center of the past five times stored in the data storage area of the storage device 33 is extracted and displayed. To do. Then, a circle 90 centered on the average load center of the load centers of the past five times is displayed. The radius of this circle 90 is the average value of the distances between the average load center and the load centers of the past five times. Further, the stability is discriminated as described above at each of the characteristic evaluation points, and the stability is set to 1 below the graphic display device 41 as shown in FIG.
Display with a rank of 0. When the stability rank is 3 or less, the variation amount in the left-right direction or the front-back direction of the subject is obtained and displayed as described above. Then, it returns to the position where the presence or absence of the sphere 24 is detected. If the display of stability is not instructed, the process returns to the position where the presence or absence of the sphere 24 is detected.

[Other Embodiment] In the above embodiment, the reference locus 5 is used.
Although the two-dimensional locus of the load center corresponding to the entire body of the subject is displayed as 1, the two-dimensional locus of the load center corresponding to the left and right feet of the subject may be displayed as the reference locus 51, or both of them. May be displayed. In the above-mentioned embodiment, the number of load measuring bases is two, but it is also possible to use two or more, and a separate load detecting base for measuring the load and the center of load of the whole body is provided, and the load detecting bases 10 and 11 and two stages are provided. You may arrange in a pile. In the above embodiment, the time change of the load of the whole body is displayed on the plotter 42, but the time change of the loads WL and WR corresponding to the left and right feet may be displayed. In the above embodiment, each measurement information regarding the load and the load center is stored in the data storage area of the storage device 33. However, the measurement information is stored in the external storage device 35 and read and displayed as necessary. It may be displayed on the device 4.

The variation amount detecting means of the above embodiment detects the variation amount of the load center at each characteristic evaluation point, but the variation of the load of the whole body of the subject or each of the left and right feet at each characteristic evaluation point is detected. The amount may be detected, the elapsed time between each characteristic evaluation point may be obtained, and the variation amount of the obtained elapsed time may be detected, or the entire body of the subject or each of the left and right feet of the subject. In the load center locus, a deviation of the subject in the front-rear direction or the left-right direction may be obtained, and the variation amount of the obtained deviation may be detected.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

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

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

FIG. 3 is a block diagram.

FIG. 4 is a diagram showing detection of a body turn start point and a swing-down point.

FIG. 5 is a diagram showing detection at the time of the top position.

FIG. 6 is a control flowchart.

[Fig. 7] Display example of reference locus, load center point, etc.

[Fig. 8] Display example of movement locus of load center point

FIG. 9 is a display example of stability of a ball hitting motion.

FIG. 10: Display example of time-dependent changes in load on the entire body

[Explanation of symbols]

 1 Swing Table 4 Display Means C Club E Variation Amount Detection Means F Stability Determining Means S Load Measuring Means U Control Means

Claims (6)

[Claims] 1. A swing table (1) on which a subject who hits and strikes a ball hitting tool (C) is placed, and a load measuring means (S) for measuring the load or load center of the entire body of the subject or each of the left and right feet. And storing the measurement result of the load measuring means (S) during the ball hitting operation as time series data, and
A ball hitting practice machine provided with a control means (U) for outputting the stored measurement result to a display means (4), based on the measurement result of the load measuring means (S) in a plurality of ball hitting movements. Based on the variation amount detecting means (E) for detecting the variation amount of a plurality of ball hitting movements and the variation amount detected by the variation amount detecting means (E), the smaller the variation amount is, the more stable the ball hitting operation is. Stability determination means (F) for determining the degree of stability is provided, and the control means (U) is configured to output the determination result of the stability determination means (F) to the display means (4). A ball hitting training machine. 2. The variation amount detecting means (E) extracts measurement results of characteristic evaluation points for each of the ball hitting operations from each of the measurement results of the load measuring means (S) in a plurality of ball hitting operations. 2. The ball-hit motion training machine according to claim 1, which is configured to detect the amount of variation in the measurement results of the extracted feature evaluation points. 3. The variation amount detecting means (E) extracts a load center of the feature evaluation point from the measurement result of the load center, and extracts the load center of the extracted feature evaluation points from the plurality of load centers. 3. The ball hitting exerciser according to claim 2, wherein the distance between the average load center and each load center is obtained, and the average value of the obtained plurality of distances is detected as the variation amount. 4. The variation amount detecting means (E) extracts a load center of the feature evaluation point from the measurement result of the load center, and extracts the load center of the subject from the plurality of load centers of the extracted feature evaluation points. The ball hitting training machine according to claim 2, which is configured to detect the amount of variation in the left-right direction and the front-back direction. 5. The variation amount detecting means (E) measures the characteristic evaluation points at a plurality of points for each of the ball hitting movements from the measurement results of the load measuring means (S) in a plurality of ball hitting movements. And detecting the amount of variation for each of the characteristic evaluation points at the plurality of points from the measurement results of the extracted characteristic evaluation points at the plurality of points, and the stability determination unit (F) determines the characteristic evaluation at the plurality of points. The control unit (U) determines the stability at each point, and the control unit (U) determines the determination result of the lowest stability position among the determination results of the plurality of positions determined by the stability determination unit (F). The batting action training machine according to claim 2, 3 or 4, which is configured to output to a display means (4). 6. The variation amount detecting means (E), based on the measurement result of the load measuring means (S) in a plurality of ball hitting movements, the progress between a plurality of characteristic evaluation points for each ball hitting movement. 2. The ball hitting exerciser according to claim 1, which is configured to obtain a time and detect a variation amount of the elapsed time between the obtained feature evaluation points.