JP5893109B1 - Method for determining appropriateness of length of hitting tool and apparatus for determining appropriateness of length of hitting tool - Google Patents

Abstract

A method for determining whether or not the length of a hitting tool is appropriate for determining whether or not the length of the hitting tool is suitable for a subject is provided. A method for determining whether or not the length of a hitting tool is appropriate includes a step of measuring a leg length of a subject, a step of measuring a standing position of the subject when the subject swings the hitting tool with respect to an object, and a plurality of steps. When each of the skilled persons swings the hitting tool with respect to the object, the standing position of the skilled person, the length of each leg of each of the plurality of experts, and when each of the plurality of skilled persons swings the hitting tool. Determining whether the length of the hitting tool is suitable for the subject based on the evaluation function constructed from the evaluation of the feeling of use and the lower limb length and the standing position of the subject. [Selection] Figure 2

Description

  The present disclosure relates to a technique for determining whether or not the length of a hitting tool is suitable for a subject.

  In sports using a hitting tool and an object (such as a ball), whether a batter succeeds or fails depends on the ability to hit the ball. As an example of the hitting tool, there is a bat used in soft baseball, hard baseball, softball and the like. There are various types of bats depending on differences in parameters such as weight, length, size, shape, and material. Since the batter's physical characteristics (eg, weight, height, etc.) are different, each batter has a suitable bat.

  If the bat is not suitable for the batter, the batter's ability cannot be maximized and the expected result cannot be obtained. Therefore, it is important for the batter to select a bat suitable for him in order to perform the battery as expected. Therefore, a technique for selecting a bat suitable for the batter has been proposed.

  For example, Japanese Patent Application Laid-Open No. 2006-230563 (Patent Document 1) hits a ball by actually hitting a ball with a bat and measuring the difference between the ball hitting position and the core position of the bat. A technique for selecting a bat whose position can be brought close to the core position of the bat is disclosed.

JP 2006-230563 A

  There is a method of selecting a hitting tool by actually hitting a ball with a hitting tool (here, a bat) many times as in the technique described above. However, the physical characteristics of the batter are prepared in advance. There is also a method of selecting a hitting tool suitable for the batter by applying to the above.

  Here, the case where the length of the hitting tool suitable for the batter is proposed by focusing on the “length” of the parameters of the hitting tool. In this case, for example, based on the correspondence table between the height and the length of the hitting tool, the length of the hitting tool suitable for the customer (batter) is proposed. However, this method is used as a guide when the batter selects the length of the hitting tool, and there is room for improvement in accuracy.

  The present disclosure has been made in order to solve the above-described problems, and an object in one aspect is to more accurately determine whether or not the length of the hitting tool is suitable for the subject. It is to provide a method for determining the suitability of the length of the hitting tool for the purpose.

  An object of another aspect is to provide a device for determining whether or not the length of the hitting tool is suitable for determining whether or not the length of the hitting tool is suitable for the subject.

  The method for determining whether or not the length of the hitting tool according to an embodiment includes a step of measuring a lower limb length of the subject, a step of measuring a standing position of the subject when the subject swings the hitting tool with respect to the object, and When each of a plurality of skilled persons swings the ball hitting tool with respect to the object, the standing position of the skilled person, the length of each lower leg of each of the plurality of skilled persons, and each of the plurality of skilled persons swings the ball hitting tool. Determining whether or not the length of the hitting tool is appropriate for the subject based on the evaluation function constructed from the evaluation of the feeling of use and the lower limb length and the standing position of the subject.

  Preferably, the evaluation function uses a lower limb length and a standing position of each of the plurality of skilled persons as explanatory variables, and a regression analysis using the evaluation value of the feeling of use when each of the plurality of skilled persons swings the hitting tool as an objective variable. The regression equation obtained by is included.

  Preferably, the standing position of the subject includes a distance between the position of the object and the position of the toe of the subject when the subject swings the hitting tool with respect to the object in plan view.

  Preferably, in the determining step, when the calculated value calculated by applying the lower limb length and the standing position of the subject to the evaluation function is larger than the reference value, the length of the hitting tool is suitable for the subject. If the calculated value is equal to or less than the reference value, it is determined that the length of the hitting tool is not suitable for the subject.

  Preferably, the method for determining suitability of the length of the hitting tool further includes a step of notifying the subject of the determination result of the determining step.

  Preferably, the step of measuring the standing position of the subject includes measuring the standing position of the subject when the subject swings the hitting tool with respect to the object for each of the plurality of hitting tools having different lengths. Including. The step of determining is based on the evaluation function constructed for each of the plurality of ball striking tools, the lower limb length of the subject, and the standing position of the subject corresponding to each of the plurality of ball striking tools. Determining whether each length is suitable. The method for determining whether or not the length of the hitting tool is appropriate further includes a step of determining a length of the hitting tool suitable for the subject based on a determination result of whether or not each length of the plurality of hitting tools is appropriate for the subject. .

  The hitting tool length suitability determination device according to another embodiment includes a first input means for receiving an input of a lower limb length of a subject, and a standing position of the subject when the subject swings the hitting tool with respect to the target A second input means for receiving an input of the player, a standing position of the skilled worker when each of the plurality of skilled persons swings the hitting tool with respect to the target object, a plurality of skilled leg lengths, and a plurality of skilled persons Whether or not the length of the hitting tool is suitable for the subject is determined based on the evaluation function constructed from the evaluation of the feeling of use when each of the swings the hitting tool and the lower limb length and the standing position of the subject. Determination means.

  Preferably, the evaluation function uses a lower limb length and a standing position of each of the plurality of skilled persons as explanatory variables, and a regression analysis using the evaluation value of the feeling of use when each of the plurality of skilled persons swings the hitting tool as an objective variable. The regression equation obtained by is included.

  Preferably, the standing position of the subject includes a distance between the position of the object and the position of the toe of the subject when the subject swings the hitting tool with respect to the object in plan view.

  Preferably, the determination unit determines that the length of the hitting tool is suitable for the subject when the calculated value calculated by applying the lower limb length and the standing position of the subject to the evaluation function is larger than the reference value. When the calculated value is equal to or less than the reference value, it is determined that the length of the hitting tool is not suitable for the subject.

  Preferably, the device for determining whether or not the length of the hitting tool is appropriate further includes notification means for notifying the subject of the determination result of the determination means.

  Preferably, a 2nd input means receives the input of a test subject's standing position when a test subject swings the said hitting tool with respect to a target object about each of several hitting tools from which a length mutually differs. The determination means determines whether each of the plurality of ball hitting tools is based on the evaluation function constructed for each of the ball hitting tools, the lower limb length of the subject, and the standing position of the subject corresponding to each of the ball hitting tools. It is determined whether or not the length is appropriate. The apparatus for determining whether or not the length of the hitting tool is appropriate further includes a determining unit that determines a length of the hitting tool suitable for the subject based on a determination result of whether or not each length of the plurality of hitting tools is appropriate for the subject. Prepare.

  According to the present disclosure, it is possible to more accurately determine whether or not the length of the hitting tool is suitable for the subject.

It is a figure for demonstrating the suitability determination method of the length of the hitting tool according to this Embodiment. It is a flowchart which shows an example of the propriety determination method of the length of the hitting tool according to this Embodiment. It is a figure for demonstrating the test subject's standing position according to this Embodiment. It is a block diagram which shows the hardware constitutions of the determination apparatus according to this Embodiment. It is a figure which shows the result of having compared each leg length of the 1st and 2nd expert group. It is a figure which shows distribution of the leg length and standing position of several skilled persons. It is a figure which shows the various data of a several expert. It is a figure which shows distribution of the leg length and standing position of several other skilled persons. It is a figure which shows the various data of a several other expert. It is a functional block diagram of the determination apparatus according to this Embodiment. It is a flowchart which shows an example of the process sequence of the determination apparatus according to this Embodiment. It is a user interface screen provided by the determination apparatus according to the present embodiment. It is a functional block diagram of the determination apparatus according to the modification of this Embodiment. It is a flowchart which shows an example of the process sequence of the determination apparatus according to the modification of this Embodiment. It is a user interface screen which the determination apparatus according to the modification of this Embodiment provides.

  Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified.

<Overall configuration and determination method>
FIG. 1 is a diagram for explaining a method for determining the suitability of the length of a hitting tool according to the present embodiment. Typically, a hitting tool length suitability determination method (hereinafter also simply referred to as “determination method”) is also referred to as a hitting tool length suitability determination device (hereinafter simply referred to as “determination device”). ) Is used. In the following description, for example, the case where the “ball hitting tool” is a bat used in baseball, softball, etc. will be described.

  Further, in the following description, a case will be described in which determination device 10 according to the present embodiment is a notebook PC (Personal Computer). The determination device 10 can be realized as an arbitrary device regardless of the type. For example, the determination device 10 may be a device such as a desktop PC, a tablet terminal device, a PDA (Personal Digital Assistance), or a smartphone.

  In the present embodiment, as shown in FIG. 1, it is assumed that a subject (batter) is going to swing a hitting tool (here, a bat) with respect to an object (ball 25) teeed up by a tee 24. To do.

  FIG. 2 is a flowchart showing an example of the determination method according to the present embodiment. Referring to FIG. 2, the determination method includes step S <b> 10 of measuring the lower limb length (length from the trochanter point to the external fruit) of the subject (batter). Typically, step S10 is performed using a measuring instrument (not shown) such as a measure.

  The determination method further includes step S20 of measuring the standing position of the subject when the subject swings the bat with respect to the ball 25. Typically, step S20 is performed using a measuring instrument (not shown) such as a measure.

  Here, with reference to FIG. 1 and FIG. 3, the standing position of the subject measured in step S20 will be specifically described. FIG. 3 is a diagram for describing the standing position of the subject according to the present embodiment.

  As shown in FIG. 1, for example, a tee 24 is installed on the ground (horizontal plane) where the subject stands. The ball 25 is supported by the tee 24 at the tee-up position. The subject adjusts the tee-up position, sets the height from the ground to the ball 25 to a desired height, and takes a stance at a position where the ball 25 can easily swing. In this state, the standing position of the subject is measured. That is, step S20 is performed when the subject swings the bat with respect to the ball 25 and determines a standing position where he can easily swing. The ball 25 may be supported by being suspended by a suspension member (thread, rope, string, etc.).

  As shown in FIG. 3, the X axis and the Y axis are taken. A direction perpendicular to the X-axis direction in a plane parallel to the ground where the subject stands (or a tee 24 is installed) is defined as a Y-axis direction, and a position of the tee 24 in the plane is defined as an origin (0, 0). Furthermore, the position of the toe of the subject's forefoot (left foot in the case of a right batter and right foot in the case of a left batter) in the plane is (Fx, Fy), and the rear foot (in the case of a right batter) (Bx, By) is the position in the plane of the right foot and the left foot in the case of a left batter.

  In the present embodiment, the standing position of the subject is the position of the tee 24 and the subject when the subject swings with respect to the ball 25 supported by the bat in a plan view as viewed from the direction perpendicular to the ground where the subject stands. Including the distance to the toe position. More specifically, the standing position of the subject is the distance D between the midpoint ((Fx + Bx) / 2, (Fy + By) / 2) between the toes of the subject's front and back feet and the origin (0, 0). It is. This is because the batting form such as the open stance and the closed stance and the stance width are different depending on the batter, and the ease of measurement is taken into consideration.

  Referring again to FIG. 2, the determination method is performed when the plurality of skilled persons swing the bat with respect to the ball 25, the standing positions of the skilled persons, the lower limb lengths of the plurality of skilled persons, and the plurality of skilled persons. Whether or not the length of the bat is suitable for the subject based on the evaluation function constructed from the sensory evaluation of the feeling of use when each of the skilled persons swings the bat and the lower limb length and standing position of the subject The determination further includes step S30.

  Although the details will be described later, the evaluation function is used when each of the plurality of skilled persons swings the bat, using the lower limb length and the standing position obtained in steps S10 and S20 as explanatory variables, respectively. Includes regression equations obtained by regression analysis with the evaluation value of feeling as the objective variable. Typically, the evaluation function is stored in the internal memory of the determination apparatus 10.

  In step S30 for determining the suitability of the length of the bat, an index value serving as a judgment index for determining the suitability of the bat for the subject is calculated by applying the lower limb length and the standing position of the subject to the evaluation function. including. The index value is a predicted value of the evaluation value of the feeling of use calculated using the regression equation. Step S30 determines that the length of the bat is suitable for the subject when the index value obtained in step S32 is larger than a reference value (for example, zero), and when the index value is equal to or less than the reference value. Further includes a step S34 of determining that the length of the bat is not suitable for the subject. Typically, step S30 is performed using the determination device 10.

  The determination method further includes step S40 for notifying the subject of the determination result in step S30. Typically, step S40 is performed using the determination device 10. Specifically, an image indicating the determination result is displayed on a display included in the determination apparatus 10, or a sound indicating the determination result is output from a speaker included in the determination apparatus 10. Thus, the subject can know whether or not the length of the bat is suitable for him / her.

<Hardware configuration>
FIG. 4 is a block diagram showing a hardware configuration of determination apparatus 10 according to the present embodiment. Referring to FIG. 4, determination apparatus 10 includes, as main components, CPU (Central Processing Unit) 100, memory 110, input device 120, display 130, communication interface (I / F) 140, and memory. An interface (I / F) 150 and a speaker 160 are included.

  The CPU 100 reads and executes the program stored in the memory 110 to control the operation of each unit of the determination device 10. More specifically, the CPU 100 executes each of the processes (steps) of the determination device 10 described later by executing the program. The CPU 100 is, for example, a microprocessor.

  The memory 110 is realized by a RAM (Random Access Memory), a ROM (Read-Only Memory), a hard disk, or the like. The memory 110 stores a program executed by the CPU 100, data used by the CPU 100, and the like.

  The input device 120 receives an operation input to the determination device 10. The input device 120 is realized by, for example, a keyboard, a button, a mouse, and the like. The input device 120 may be realized by a touch panel.

  The display 130 displays an image, text, and other information on the display screen based on a signal from the CPU 100.

  The communication interface (I / F) 140 is a communication interface for exchanging various data between the determination device 10 and an external device. The communication method may be, for example, wireless communication using Bluetooth (registered trademark), wireless LAN (Local Area Network), or wired communication using USB (Universal Serial Bus). .

  A memory interface (I / F) 150 reads data from an external storage medium 152. More specifically, the CPU 100 reads data stored in the external storage medium 152 via the memory interface 150 and stores the data in the memory 110. The CPU 100 reads data from the memory 110 and stores the data in the external storage medium 152 via the memory interface 150.

  As the storage medium 152, a CD (Compact Disc), a DVD (Digital Versatile Disk), a BD (Blu-ray (registered trademark) Disc), a USB (Universal Serial Bus) memory, a memory card, an FD (Flexible Disk), Hard disk, magnetic tape, cassette tape, MO (Magnetic Optical Disc), MD (Mini Disc), IC (Integrated Circuit) card (excluding memory card), optical card, EPROM, EEPROM (Electronically Erasable Programmable Read-Only Memory), etc. And a medium for storing the program in a nonvolatile manner.

<Evaluation function>
(Derivation method)
Next, a method for deriving an evaluation function used for determining whether or not the length of the bat is suitable for the subject will be described. As described above, the evaluation function is a regression in which the lower limb length and the standing position of each of a plurality of experts are explanatory variables, and the evaluation value of the feeling of use when each of the plurality of experts swings the bat is an objective variable. It is a regression equation obtained by analysis.

  As a result of intensive studies, the inventor of the present application has found that the posture and position when the batter swings the bat may affect the length of the bat suitable for the batter. Therefore, a plurality of skilled persons swing a bat having a predetermined length (here, 86 cm) and a bat that is usually used with respect to a teeed-up ball (see FIG. 1), and use it for an 86 cm bat. The feeling was evaluated.

  In the present embodiment, 30 players belonging to the baseball club of the university are selected as “a plurality of skilled workers”. Moreover, the length of the bat which each expert usually uses is 83 cm, 83.5 cm, 84 cm, 85 cm, and is a bat shorter than 86 cm.

  The inventor of the present application has a first expert group that has been evaluated as being easier to use (or as much as) the short bat that the 86 cm bat normally uses, and the short that the 86 cm bat normally uses. Comparison of physical characteristics (height, weight, foot size, upper arm length, forearm length, shoulder width, waist width, lower limb length, lower limb height) with a second group of experts evaluated as harder to use than bats It was. As a result, the inventor of the present application has found that there is a significant difference between the lengths of the lower limbs of the first and second expert groups as shown in FIG.

  FIG. 5 is a diagram showing a result of comparing the lengths of the lower limbs of the first and second expert groups. Referring to FIG. 5, the average value of the lower limb length of the first expert group is about 5% longer than the average value of the lower limb length of the second expert group. It can be seen that there is a significant difference in the length of each leg.

  Further, the inventors of the present application have examined the relationship between the leg length and the standing position by paying attention to the standing position of each skilled person with respect to the ball. Specifically, the standing position of the expert is the distance between the midpoint between the toes of each of the expert's front and rear legs and the position of the tee 24.

  FIG. 6 is a diagram showing the distribution of leg lengths and standing positions of a plurality of skilled persons. In FIG. 6, the vertical axis indicates the leg length and the horizontal axis indicates the standing position. In the scatter diagram shown in FIG. 6, the lower limb lengths and standing positions of the first group of skilled workers are distributed in the upper left area, and the lower limb lengths and standing positions of the second group of skilled persons are distributed in the lower right area. I understand that. From this, it can be estimated that the length of the lower limb is shorter and the longer the bat tends to be unsuitable, the longer the bat tends to be suitable, and the longer the length of the lower limb, the closer to the ball tends to be suitable. .

  Therefore, the inventor of the present application uses the lower limb length and the standing position of each of the plurality of experts as explanatory variables based on the above knowledge, and obtains an evaluation value of the feeling of use when each of the plurality of experts swings the 86 cm bat. Multiple regression analysis was performed as the objective variable. It should be noted that an expert who evaluated that the feeling of use of the bat is good (that is, an expert belonging to the first expert group) is “1”, and the expert who evaluated that the feeling of use of the bat is bad ( In other words, the evaluation value of the experts belonging to the second expert group was set to “−1”. The regression equation (that is, the evaluation function) derived as a result is shown in the following equation (1).

  By using Expression (1), it is possible to calculate an index value T that is a predicted value of the evaluation value. Various data including the index value T calculated for each of the plurality of skilled persons is shown in FIG.

  FIG. 7 is a diagram showing various data of a plurality of skilled workers. With reference to FIG. 7, for each of a plurality of skilled persons, an actual pass / fail evaluation result based on the evaluation value and a predicted pass / fail evaluation result based on the index value T will be compared. Here, when the index value T is larger than the reference value (here, zero), the expert predicts that the feeling of using the bat is good, and when the index value T is less than the reference value, It is assumed that the expert evaluates that the feeling of use of the bat is bad.

  Then, as shown in FIG. 7, the actual pass / fail evaluation result and the predicted pass / fail evaluation result are the same for 24 skilled workers other than 6 skilled workers A2 to A5, A7, and A24. Recognize. That is, the coincidence rate between the actual pass / fail evaluation result and the predicted pass / fail evaluation result is 80%. Therefore, it can be said that the validity of the above-described knowledge obtained as a result of intensive studies by the inventors of the present application is shown.

(Further verification of validity)
In order to further verify the validity of the suitability determination of the length of the bat using the evaluation function obtained by the above-described derivation method, the inventor of the present application, about 30 experts different from the expert shown in FIG. Comparison was made between the actual pass / fail evaluation result of the feeling of use when the 86 cm bat was swung and the predicted pass / fail evaluation result. The comparison results are shown in FIGS. Also here, as a plurality of other skilled workers, 30 players belonging to the university baseball club are selected.

  FIG. 8 is a diagram showing the distribution of the leg lengths and standing positions of a plurality of other skilled persons. FIG. 9 is a diagram showing various data of a plurality of other skilled workers.

  Referring to FIG. 8 and FIG. 9, the actual pass / fail evaluation results and the predicted pass / fail evaluation results are obtained for 21 skilled workers other than 9 trainees B 7, B 9, B 14 to B 16, B 22, B 23, B 25, B 26. Match. That is, it can be seen that the matching rate between the actual pass / fail evaluation result and the predicted pass / fail evaluation result is 70%. From this result, even in a population (experts B1 to B30) other than the population (experts A1 to A30) who acquired each data in order to derive an evaluation function, the quality of use is evaluated using the evaluation function It can be said that the result can be predicted. Therefore, it is possible to determine whether or not the length of the bat is suitable for the subject using the evaluation function.

<Functional configuration>
FIG. 10 is a functional block diagram of determination apparatus 10 according to the present embodiment. Referring to FIG. 10, determination device 10 includes a lower limb length input unit 210, a position input unit 220, a determination unit 230, and a notification unit 240. These are basically realized by the CPU 100 of the determination apparatus 10 executing a program stored in the memory 110 and giving a command to the components of the determination apparatus 10. Note that some or all of these functional configurations may be realized by hardware.

  The lower limb length input unit 210 receives an input of the subject's lower limb length via the input device 120. The lower limb length input unit 210 may be configured to receive an input of the subject's lower limb length from an external device via the communication interface 140.

  The position input unit 220 receives an input of the subject's standing position when the subject swings the bat with respect to the object via the input device 120. The position input unit 220 may be configured to receive an input of a subject's standing position from an external device via the communication interface 140. Specifically, the standing position is the distance D described above.

  The determination unit 230 includes a standing position of each skilled person when each of the plurality of skilled persons swings the bat with respect to the object, a lower limb length of each of the plurality of skilled persons, and each of the plurality of skilled persons. Whether or not the length of the bat is suitable for the subject is determined based on the evaluation function constructed from the evaluation of the feeling of use when swinging, and the lower limb length and the standing position of the subject. Specifically, the determination unit 230 calculates the index value by applying the lower limb length and the standing position of the subject to the evaluation function. The determination unit 230 determines that the length of the bat is suitable for the subject when the index value is larger than the reference value, and the length of the bat is suitable for the subject when the index value is equal to or less than the reference value. Judge that it is not. The evaluation function is stored in the memory 110.

  The notification unit 240 notifies the subject of the determination result of the determination unit 230. For example, the notification unit 240 displays an image indicating the determination result on the display 130. Or the alerting | reporting part 240 outputs the audio | voice which shows a determination result from the speaker 160. FIG.

<Processing Procedure of Determination Device 10>
FIG. 11 is a flowchart showing an example of the processing procedure of determination apparatus 10 according to the present embodiment. The following steps are realized by the CPU 100 executing a program stored in the memory 110. Assume that the memory 110 stores an evaluation function.

  Referring to FIG. 11, CPU 100 displays an input screen (user interface screen 500) for accepting input of necessary information on display 130 (step S100).

  FIG. 12 shows user interface screen 500 provided by determination apparatus 10 according to the present embodiment. Referring to FIG. 12, a user interface screen 500 includes a subject name input area 510, a subject lower leg length input area 520, a bat length input area 530 to be swung by the subject, and a subject standing position. Input area 540, a button 550 for starting the determination, and a display area 560 for the determination result. FIG. 12 shows a screen example in which corresponding information has already been input in the input areas 510 to 540 and the determination result is displayed.

  Referring to FIG. 11 again, the determination device 10 determines whether or not an input of various information has been received via the input device 120 (step S101). Specifically, the determination apparatus 10 determines whether or not an input of a subject's name, bat length, subject's lower limb length, and standing position has been received.

  When various information is not input (NO in step S101), CPU 100 repeats the process of step S101. When various types of information are input (NO in step S101), CPU 100 proceeds to the process of step S102. At this time, the CPU 100 displays information corresponding to the input areas 510 to 540, respectively.

  Next, the CPU 100 determines whether or not a determination start instruction has been received via the input device 120 (step S102). For example, CPU 100 determines that the instruction has been accepted when button 550 indicating the start of determination is selected.

  CPU100 repeats the process of step S102, when determination is not started (in step S102 NO). On the other hand, when starting the determination (YES in step S102), CPU 100 calculates the index value by applying the lower limb length and standing position of the subject to the evaluation function (step S103).

  The CPU 100 determines whether or not the index value is larger than the reference value (step S104). If the index value is larger than the reference value (YES in step S104), it is determined that the length of the bat is suitable for the subject, and the subject is informed (step S105). For example, the CPU 100 displays a determination result “suitable” in the display area 560 of the user interface screen 500. Then, the process ends.

  On the other hand, when the index value is equal to or smaller than the reference value (NO in step S104), it is determined that the length of the bat is not suitable for the subject, and the fact is notified to the subject (step S106). For example, the CPU 100 displays a determination result “not suitable” in the display area 560 of the user interface screen 500. Then, the process ends.

<Modification of Embodiment>
In the above-described embodiment, the configuration for determining whether one bat having a predetermined length (for example, 86 cm) is suitable for the subject has been described. Here, for each of a plurality of bats having different lengths, a configuration for determining the bat length suitable for the subject by determining whether or not the bat length is suitable for the subject is described. To do. Note that the hardware configuration of the determination apparatus according to the modification of the embodiment is the same as the hardware configuration of determination apparatus 10, and therefore detailed description thereof will not be repeated.

(Judgment method)
In the determination method according to the modified example, after step S10 in FIG. 2 is performed, step S20 is performed for each of a plurality of bats having different lengths. Specifically, the determination method includes, for each of a plurality of bats having different lengths, a step of measuring the standing position of the subject when the subject swings the bat with respect to the ball 25. Thereby, the standing position of the subject corresponding to each of the plurality of bats is measured.

  Next, in the determination method according to the modification, step S30 is performed for each of the plurality of bats. Specifically, the determination method is based on the evaluation function constructed for each of the plurality of bats, the lower limb length of the subject, and the standing position of the subject corresponding to each of the plurality of bats. Determining whether the length of each of the bats is suitable. For example, if there are two bats (85 cm bat G and 86 cm bat H), the evaluation function constructed for bat G and the evaluation function constructed for bat H are stored in the internal memory of the determination apparatus. It is remembered.

  And the determination method according to a modification includes the step of determining the length of the bat suitable for the subject based on the determination result of whether or not each length of the plurality of bats is suitable for the subject. For example, when it is determined that the length of the bat G is suitable for the subject and the length of the bat H is not suitable for the subject, the length of the bat suitable for the subject is determined to be 85 cm. .

  Moreover, the determination method according to the modification may include a step of notifying the subject of the determined bat length (for example, 85 cm).

(Functional configuration)
FIG. 13 is a functional block diagram of determination apparatus 10A according to the modification of the present embodiment. Referring to FIG. 13, determination device 10A includes a lower limb length input unit 210A, a position input unit 220A, a determination unit 230A, a notification unit 240A, and a determination unit 250A. These are basically realized by the CPU 100 of the determination apparatus 10A executing a program stored in the memory 110 and giving a command to the components of the determination apparatus 10A. Note that some or all of these functional configurations may be realized by hardware.

  The determination device 10A corresponds to the determination device 10 shown in FIG. 1, FIG. 4, and FIG. 10, but for the sake of convenience, an additional symbol “A” is given for distinction from the above-described embodiment. The lower limb length input unit 210A is substantially the same as the lower limb length input unit 210 in FIG.

  The position input unit 220 </ b> A accepts an input of the standing position of the subject when the subject swings the bat with respect to the target for each of a plurality of bats having different lengths via the input device 120.

  Based on the evaluation function constructed for each of the plurality of bats, the lower limb length of the subject, and the standing position of the subject corresponding to each of the plurality of bats, the determination unit 230A determines the length of each of the plurality of bats. It is determined whether or not is suitable. Specifically, for each of the plurality of bats, the determination unit 230A calculates the index value by applying the lower limb length of the subject and the standing position of the subject corresponding to the bat to the evaluation function corresponding to the bat. To do. Thereby, an index value is calculated for each of the plurality of bats.

  Then, for each of the plurality of bats, the determination unit 230A determines that the length of the bat is appropriate for the subject when the index value corresponding to the bat is larger than the reference value, and corresponds to the bat. When the index value is equal to or less than the reference value, it is determined that the length of the bat is not suitable for the subject. Thereby, it is determined whether or not the length of each of the plurality of bats is suitable for the subject.

  The determination unit 250A determines the length of the bat suitable for the subject based on the determination result of whether each of the plurality of bats is suitable for the subject.

  The notification unit 240A notifies the subject of the length of the bat determined by the determination unit 250A. In addition, 240 A of alerting | reporting parts may alert | report to a test subject whether the length of each of several bats is suitable for a test subject.

(Processing procedure of determination apparatus 10A)
FIG. 14 is a flowchart illustrating an example of a processing procedure of determination apparatus 10A according to the modification of the present embodiment. The following steps are realized by the CPU 100 executing a program stored in the memory 110. Here, for ease of explanation, a case will be described in which a subject uses an 85 cm bat G and an 86 cm bat H as a plurality of bats having different lengths. Therefore, it is assumed that the memory 110 stores the evaluation function Eg derived for the 85 cm bat G and the evaluation function Eh derived for the 86 cm bat H. Needless to say, the subject may use three or more bats having different lengths.

  Referring to FIG. 14, CPU 100 displays an input screen (user interface screen 600) for accepting input of necessary information on display 130 (step S200).

  FIG. 15 shows user interface screen 600 provided by determination apparatus 10A according to the modification of the present embodiment. Referring to FIG. 15, user interface screen 600 includes a subject name input area 610, a subject's lower limb length input area 620, and the lengths of a plurality of bats (bats G and H) used by the subject. Input areas 630 and 632, standing position input areas 640 and 642 corresponding to each of the bats G and H, a button 650 for starting the determination, and a display area for determining the bat length suitable for the subject 660. FIG. 15 shows an example of a screen on which the corresponding information has already been input in the input areas 610 to 642 and the determination result is displayed.

  Referring to FIG. 14 again, CPU 100 determines whether an input of various information has been received via input device 120 (step S201). Specifically, the CPU 100 determines whether or not the input of the subject's name, the length of each of the bats G and H, the lower limb length of the subject, and the standing positions Dg and Dh corresponding to the bats G and H, respectively. to decide.

  When various information is not input (NO in step S201), CPU 100 repeats the process of step S201. When various types of information are input (NO in step S201), CPU 100 proceeds to the process in step S202. At this time, the CPU 100 displays information corresponding to the input areas 610 to 642, respectively.

  Next, the CPU 100 determines whether or not a determination start instruction has been received via the input device 120 (step S202). For example, CPU 100 determines that the instruction has been accepted when button 650 indicating the start of determination is selected.

  CPU100 repeats the process of step S202, when determination is not started (in step S202 NO). On the other hand, when starting the determination (YES in step S202), CPU 100 calculates an index value for each of bats G and H (step S203). Specifically, the CPU 100 calculates the index value for the bat G by applying the lower limb length of the subject and the standing position corresponding to the bat G to the evaluation function Eg. Further, the CPU 100 calculates the index value for the bat H by applying the lower limb length of the subject and the standing position corresponding to the bat H to the evaluation function Eh.

  CPU 100 determines whether or not at least one index value for bats G and H is greater than a reference value (for example, zero) (step S204). When the index values of both bats G and H are equal to or less than the reference value (NO in step S204), CPU 100 determines that the lengths of bat G and bat H are not suitable for the subject, and accordingly. The subject is notified (step S205). For example, the CPU 100 notifies that 85 cm and 86 cm bats are not suitable for the subject. Then, the process ends. On the other hand, when at least one index value is larger than the reference value (YES in step S204), CPU 100 determines whether or not the index value for bat G is larger than the reference value (step S206). ).

  When the index value for bat G is equal to or less than the reference value (that is, the index value for bat H is greater than the reference value) (NO in step S206), CPU 100 determines that the length of bat H is suitable for the subject. The subject is informed that this is the case (step S207). For example, the CPU 100 notifies that the length of the bat suitable for the subject is 86 cm. Then, the process ends. On the other hand, when the index value for bat G is larger than the reference value (YES in step S206), CPU 100 determines whether or not the index value for bat H is larger than the reference value (step S206). S208).

  If the index value for bat H is greater than the reference value (YES in step S208), CPU 100 determines that the lengths of bat G and bat H are suitable for the subject, and notifies that fact (step) S209). Specifically, the CPU 100 notifies that the length of the bat suitable for the subject is 85 cm and 86 cm. Then, the process ends. On the other hand, when the index value for bat H is equal to or less than the reference value (NO in step S208), CPU 100 determines that the length of bat G is suitable for the subject and notifies the fact (step S210). . For example, the CPU 100 notifies that the length of the bat suitable for the subject is 85 cm. Then, the process ends.

  In the above, for example, the CPU 100 may be configured to execute the processes of steps S204, S206, and S208 in parallel. Further, the CPU 100 may be configured to execute the processes of step S206 and step S208 interchangeably.

<Other embodiments>
In the above-described embodiment, the configuration in which the hitting tool is a bat has been described, but the configuration is not limited thereto. For example, sports such as baseball, tennis, and golf are common in that the subject can freely determine the distance between the standing position and the object. Therefore, the hitting tool may be a racket used in tennis or a golf club used in golf. As described above, the configuration exemplified as the above-described embodiment can also be applied to a hitting tool used in sports in which the subject can freely determine the distance between the standing position and the object.

  It is also possible to provide a program that causes a computer to function and execute control as described in the above flowchart. Such a program is recorded on a non-temporary computer-readable recording medium such as a flexible disk attached to the computer, a CD-ROM (Compact Disk Read Only Memory), a ROM, a RAM, and a memory card as a program product. It can also be provided. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk built in the computer. A program can also be provided by downloading via a network.

  The program may be a program module that is provided as a part of a computer operating system (OS) and that calls a required module at a predetermined timing to execute processing. In that case, the program itself does not include the module, and the process is executed in cooperation with the OS. A program that does not include such a module can also be included in the program according to the present embodiment.

  Further, the program according to the present embodiment may be provided by being incorporated in a part of another program. Even in this case, the program itself does not include the module included in the other program, and the process is executed in cooperation with the other program. A program incorporated in such another program can also be included in the program according to the present embodiment.

  The configuration illustrated as the above-described embodiment is an example of the configuration of the present invention, and can be combined with another known technique, and a part of the configuration is omitted without departing from the gist of the present invention. It is also possible to change the configuration.

<Effect of Embodiment>
According to the present embodiment, it is possible to present whether or not the length of the hitting tool is suitable for the subject simply by having the subject take the stance with the hitting tool. In addition, it does not impose a burden such as having the subject actually swing the ball hitting tool many times.

  Further, according to the present embodiment, it is possible to present more accurately whether or not it is suitable for the subject, not just as a guide.

  Moreover, according to this Embodiment, the length of the hitting tool suitable for the test subject can be presented only by having each of a plurality of hitting tools having different lengths and taking a stance.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

10, 10A determination device, 24 tee, 25 balls, 100 CPU, 110 memory, 120 input device, 130 display, 140 communication interface, 150 memory interface, 152 storage medium, 160 speaker, 210, 210A lower limb length input unit, 220, 220A position input unit, 230, 230A determination unit, 240, 240A notification unit, 250A determination unit, 500, 600 user interface screen.

Claims (6)

And step processor, accepting an input of the lower limb length of the subject,
Wherein the processor, the steps of the accepting an input of a standing position of the subject in the case of swinging the subject a hitting instrument relative to the object,
The processor includes a standing position of each skilled worker when each of the plurality of skilled persons swings the hitting tool with respect to the target object, a leg length of each of the plurality of skilled persons, and the plurality of skilled persons. Whether or not the length of the hitting tool is suitable for the subject based on the evaluation function constructed from the evaluation of the feeling of use when each swings the hitting tool and the lower limb length and the standing position of the subject viewing including the step of determining,
The standing position of the subject includes a distance between the position of the object in plan view and the position of the toe of the subject when the subject swings the hitting tool with respect to the object,
The evaluation function is a regression with the lower limb length and standing position of each of the plurality of skilled persons as explanatory variables, and the evaluation value of the feeling of use when each of the plurality of skilled persons swings the hitting tool as an objective variable. A method for determining the suitability of the length of a hitting tool, including a regression equation obtained by analysis . In the determining step, when the calculated value calculated by applying the lower limb length and the standing position of the subject to the evaluation function is larger than a reference value, the length of the hitting tool is suitable for the subject. determined to have, if the calculated value is less than said reference value includes determining the length of the ball-hitting instrument to the subject is not appropriate, the length of the hitting device according to claim 1 Appropriateness judgment method. The step of accepting an input of a standing position of the subject, for each of the different lengths multiple hitting device, the input of the standing position of the subject when the subject swings the hitting member relative to the object the acceptance includes Rukoto,
The determining step is based on the evaluation function constructed for each of the plurality of hitting tools, the lower limb length of the subject, and the standing position of the subject corresponding to each of the plurality of hitting tools. Determining whether the length of each of the plurality of ball striking tools is suitable for the subject,
The suitability determination method is:
Wherein the processor further comprises a length of each of the plurality of hitting instrument is the based on whether the determination result is suitable for a subject, to determine the length of the ball member suitable for the subject, according to claim 2 A method for determining the suitability of the length of the hitting tool described in 1. First input means for receiving input of a lower limb length of the subject;
A second input means for receiving an input of the standing position of the subject when the subject swings the hitting tool with respect to the object;
When each of the plurality of skilled persons swings the hitting tool with respect to the object, the standing position of the skilled person and the leg lengths of the plurality of skilled persons, and each of the plurality of skilled persons use the hitting tool. A determination means for determining whether or not the length of the hitting tool is suitable for the subject based on an evaluation function constructed from an evaluation of a feeling of use when swinging and a lower limb length and a standing position of the subject And
The standing position of the subject includes a distance between the position of the object in plan view and the position of the toe of the subject when the subject swings the hitting tool with respect to the object,
The evaluation function is a regression with the lower limb length and standing position of each of the plurality of skilled persons as explanatory variables, and the evaluation value of the feeling of use when each of the plurality of skilled persons swings the hitting tool as an objective variable. A device for determining the suitability of the length of a hitting tool, including a regression equation obtained by analysis . When the calculated value calculated by applying the lower limb length and the standing position of the subject to the evaluation function is larger than a reference value, the length of the hitting tool is suitable for the subject. a judgment, when the calculated value is less than the reference value, the subject is determined that the length of the ball striking device is not suitable, the length of the appropriateness determination device of the hitting device of claim 4. The second input means receives an input of the standing position of the subject when the subject swings the hitting tool with respect to the object for each of a plurality of hitting tools having different lengths.
The determination means is based on the evaluation function constructed for each of the plurality of hitting tools, the lower limb length of the subject, and the standing position of the subject corresponding to each of the plurality of hitting tools. To determine whether or not each of the plurality of hitting tools has a suitable length,
The suitability determination device includes:
The determination device according to claim 5 , further comprising a determining unit that determines a length of the hitting tool suitable for the subject based on a determination result of whether or not each length of the plurality of hitting tools is suitable for the subject. A device for determining whether or not the length of the hitting tool is appropriate.

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