JP7052486B2 - Trap technology evaluation device, soccer equipment and trap technology evaluation method - Google Patents

Description

The present disclosure relates to a trap technology evaluation device, soccer equipment, and a trap technology evaluation method.

Improve your kicking skills by mounting a pressure response sensor on the instep of your soccer shoe or at a selected location along the laces on the top of the shoe and providing acoustic feedback based on the output signal of the pressure response sensor. The technology to support is known.

Japanese Patent Publication No. 2005-507678

However, in the above-mentioned conventional technique, the evaluation result of the trap technique when the user traps the ball is not output. In addition to kicking skills, improving trapping skills is an important factor in improving soccer. Conventionally, for example, in order to learn a chest trap, only repeated practice based on the advice of an instructor is required, and there is no useful evaluation method for learning the trap technique.

Therefore, in one aspect, it is an object of the present invention to output information representing the evaluation result of the trap technique.

In order to achieve the above object, in one aspect of the present invention, a pressure detector disposed on at least one soccer device of soccer wear, soccer spats, and soccer shoes.
Provided is a trap technology evaluation device provided with an output unit that outputs information indicating an evaluation result of the trap technology when a user wearing the soccer equipment traps a ball based on the data output by the pressure detection unit. Will be done.

In one aspect, according to the present invention, it is possible to output information representing the evaluation result of the trap technique.

It is a figure which shows the whole structure of the trap technique evaluation apparatus by one Example. It is a figure which shows an example of the soccer wear in which a piezoelectric part is arranged. It is a figure which shows an example of the hardware composition of a processing apparatus. It is a functional block diagram of a processing apparatus. It is explanatory drawing of the test method. It is a figure which shows the test result. It is a figure which shows the test result. It is a schematic flowchart explaining the operation example of the trap technique evaluation apparatus. It is a schematic flowchart which shows an example of the evaluation information generation processing executed in step S824 of FIG.

Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings.

[System configuration]
FIG. 1 is a diagram showing an overall configuration of a trap technology evaluation device 1 according to an embodiment. FIG. 2 is a diagram showing an example of soccer wear W in which the piezoelectric portion 11 is arranged. In the following, the user is a user of the trap technology evaluation device 1, and is a person who receives output of information (hereinafter, referred to as “evaluation information”) representing the evaluation result of the trap technology from the trap technology evaluation device 1.

The trap technology evaluation device 1 is a device that outputs evaluation information. As shown in FIG. 1, the trap technology evaluation device 1 includes a piezoelectric section 11, an output section 12, and a processing device 100 (an example of an output section and an example of an external device).

The piezoelectric portion 11 is arranged on the soccer equipment. For example, the piezoelectric portion 11 may be arranged in soccer wear, soccer spats, soccer shoes, or the like. In this embodiment, as an example, the piezoelectric portion 11 is arranged in the soccer wear W. In this case, for example, the piezoelectric portion 11 is arranged on the front side of the body of the soccer wear W so that the arrangement range is indicated by reference numeral 2 in FIG. The arrangement range is not limited to that shown in FIG. 2, and may be a wider range or a narrower range. The piezoelectric unit 11 may be in a form in which each piezoelectric element is arranged or formed in a two-dimensional array in the arrangement range.

The piezoelectric portion 11 may be formed of a fiber having piezoelectricity (hereinafter, also referred to as “piezoelectric fiber”). For example, as shown schematically by the balloon Q in FIG. 2, the piezoelectric portion 11 may be formed by having the piezoelectricity of each fiber 21 of the soccer wear W. Alternatively, the piezoelectric portion 11 may be provided so as to be separately attached to the fiber of the soccer wear W.

The piezoelectric fiber is preferably made of a piezoelectric polymer. As the piezoelectric polymer, any polymer exhibiting piezoelectricity such as polyvinylidene fluoride and polylactic acid can be used, but it is preferable to mainly contain polylactic acid. Polylactic acid is easily oriented by stretching after melt spinning and exhibits piezoelectricity, and is excellent in productivity in that the electric field alignment treatment required for polyvinylidene fluoride or the like is not required. Further, the piezoelectric fiber made of polylactic acid has a small polarization in the axial tension or compressive stress, and a relatively large electric output can be obtained depending on the shear stress, so that the shear stress can be easily applied to the piezoelectric polymer. As polylactic acid, depending on its crystal structure, L-lactic acid, poly-L-lactic acid obtained by polymerizing L-lactide, D-lactic acid, poly-D-lactic acid obtained by polymerizing D-lactide, and further, their There are stereo complex polylactic acid having a hybrid structure, but any of them can be used as long as it exhibits piezoelectricity.

Similarly, when the piezoelectric portion 11 is arranged in the soccer spats, the piezoelectric portion 11 may be formed of fibers having piezoelectricity. On the other hand, when the piezoelectric portion 11 is arranged in the soccer shoe, the piezoelectric portion 11 may be integrally embedded in the material (for example, elastomer) of the soccer shoe.

The output unit 12 outputs information (hereinafter, referred to as “voltage information”) representing the voltage output by the piezoelectric unit 11 to the processing device 100. For example, the output unit 12 outputs the voltage information obtained at each predetermined sampling cycle to the processing device 100 in real time. Alternatively, the output unit 12 may output the voltage information (time series data) obtained in a certain period to the processing device 100. The output unit 12 may perform predetermined processing (for example, amplification processing or the like) on the voltage information output by the piezoelectric unit 11 and then output the voltage information to the processing device 100.

The output unit 12 may be configured as, for example, a communication unit. When the output unit 12 is configured as a communication unit, the communication mode between the output unit 12 and the processing device 100 is arbitrary. For example, when performing an offline evaluation, a wired communication mode may be used. On the other hand, when performing online (real-time) evaluation, it is a wireless communication form. For example, as wireless communication modes, short-range wireless communication, Bluetooth (registered trademark), Wi-Fi (Wi-Filess Fidelity), mobile phone wireless communication network, Internet, World Wide Web, VPN (Virtual Private Network), WAN (Wide). Area Network), or any combination thereof and the like may be included.
In the following embodiment, the output unit 12 will be described as being configured as a communication unit.

Here, when the ball hits the soccer wear W, voltage information corresponding to the ball is generated. For example, the stronger the ball hits the soccer wear W, the higher the voltage. Further, when the ball is in contact with the soccer wear W, a higher voltage is generated than when the ball is not in contact with the soccer wear W. Further, in the region where the ball is in contact with the soccer wear W, a higher voltage is generated than in the region where the ball is not in contact with the soccer wear W.

The output unit 12 is arranged in the soccer wear W in such a manner that it is electrically connected to the piezoelectric unit 11. The output unit 12 may be arranged, for example, in the soccer wear W at a position where the possibility of contact with the ball is low (for example, the back collar).

The processing device 100 may be, for example, a processing device such as a personal computer or a smartphone owned by the user. The processing device 100 outputs evaluation information. The output mode of the evaluation information is arbitrary, and may be, for example, display, voice, or a combination thereof.

FIG. 3 is a diagram showing an example of the hardware configuration of the processing device 100.

In the example shown in FIG. 3, the processing device 100 includes a control unit 101, a main storage unit 102, an auxiliary storage unit 103, a drive device 104, a network I / F unit 106, and an input unit 107.

The control unit 101 is an arithmetic unit that executes a program stored in the main storage unit 102 or the auxiliary storage unit 103, receives data from the input unit 107 or the storage device, calculates and processes the data, and then outputs the data to the storage device or the like. do.

The main storage unit 102 is a ROM (Read Only Memory), a RAM (Random Access Memory), or the like. The main storage unit 102 is a storage device that stores or temporarily stores programs and data such as an OS (Operating System) and application software that are basic software executed by the control unit 101.

The auxiliary storage unit 103 is an HDD (Hard Disk Drive), SSD (Solid State Drive), or the like, and is a storage device for storing data related to application software or the like.

The drive device 104 reads a program from a recording medium 105, for example, a flexible disk, and installs it in the storage device.

The recording medium 105 stores a predetermined program. The program stored in the recording medium 105 is installed in the processing device 100 via the drive device 104. The installed predetermined program can be executed by the processing device 100.

The network I / F unit 106 is an interface between a peripheral device (for example, an output unit 12) having a communication function connected via a network constructed by a data transmission line such as a wired and / or wireless line and a processing device 100. be.

The input unit 107 includes a keyboard, a mouse, a touch pad, and the like equipped with cursor keys, number input, various function keys, and the like.

In the example shown in FIG. 3, various processes and the like described below can be realized by causing the processing device 100 to execute the program. It is also possible to record the program on the recording medium 105 and have the processing apparatus 100 read the recording medium 105 on which the program is recorded to realize various processes described below. As the recording medium 105, various types of recording media can be used. For example, the recording medium 105 is a recording medium such as a CD (Compact Disc) -ROM, a flexible disk, a magneto-optical disk, or the like that optically, electrically, or magnetically records information, a ROM, a flash memory, or the like. It may be a semiconductor memory or the like that electrically records.

FIG. 4 is a functional block diagram of the processing device 100.
The processing device 100 includes a voltage information acquisition unit 202, an index derivation unit 210, an evaluation unit 220, and an evaluation result output unit 230. The voltage information acquisition unit 202, the index derivation unit 210, the evaluation unit 220, and the evaluation result output unit 230 execute a program stored in a storage device such as the main storage unit 102 or the auxiliary storage unit 103 by the control unit 101. It can be realized by that.

The voltage information acquisition unit 202 acquires voltage information from the output unit 12. The voltage information is, for example, a set of voltage values at each point (for example, each mesh divided into meshes) in the arrangement region (see FIG. 2) of the piezoelectric portion 11.

The index derivation unit 210 derives an index related to the user's trap technique based on the voltage information (voltage output by the piezoelectric unit 11). The index is an arbitrary parameter that represents the characteristics of the voltage information that correlates with the trap technique. For example, as described below, the movement mode of the position where the ball in contact with the soccer wear W or the ball in the soccer wear W is The contact area, the duration of contact of the ball with the soccer wear W, and the like.
Specifically, as shown in FIG. 4, the index derivation unit 210 includes a ball contact area calculation unit 211, a contact time calculation unit 212, a contact area calculation unit 213, a ball center movement distance calculation unit 214, and a reference. Includes time calculation unit 215.

The ball contact area calculation unit 211 calculates the area in contact with the ball in the soccer wear W (hereinafter referred to as “ball contact area”). For example, the ball contact area calculation unit 211 selects and selects three arbitrary outermost points where a voltage (electromotive force) equal to or higher than a predetermined threshold value is generated in the arrangement region (see FIG. 2) of the piezoelectric unit 11. The circle passing through the three points is calculated as the ball contact area. In the modified example, a circle including the point cloud may be calculated as a ball contact region centering on the center of the point cloud in which a voltage (electromotive force) equal to or higher than a predetermined threshold is generated. The predetermined threshold value is a threshold value for detecting a state in which the ball is in contact with the soccer wear W, and may be adapted by a test or the like.

The contact time calculation unit 212 calculates the duration of the state in which the ball is in contact with the soccer wear W (hereinafter referred to as “contact time”). For example, the contact time calculation unit 212 calculates the time from when the ball contact area calculated by the ball contact area calculation unit 211 becomes the predetermined area A1 or more to the time when the ball contact area becomes less than the predetermined area A2 as the contact time. The predetermined areas A1 and A2 correspond to the area of the ball contact area at the moment when the ball contacts and immediately before the ball leaves, and are adapted by a test or the like. The predetermined areas A1 and A2 may have the same value.

The contact area calculation unit 213 calculates the area in contact with the ball in the soccer wear W (hereinafter referred to as “contact area”). For example, the contact area calculation unit 213 calculates the maximum area or the average area of the ball contact area calculated by the ball contact area calculation unit 211 as the contact area.

The ball center movement distance calculation unit 214 calculates the movement distance (movement distance in one trap) of the center of the ball contact region described above. Hereinafter, the distance calculated by the ball center movement distance calculation unit 214 is also referred to as a “ball center movement distance”.

The reference time calculation unit 215 calculates the reference time required to buffer the momentum of the ball. The reference time may be calculated in a different manner depending on the speed of the ball when the ball comes into contact with the soccer wear W (hereinafter referred to as “ball speed at the time of trap”). In this case, a more accurate reference time can be calculated according to the ball speed at the time of trapping. The ball velocity at the time of trap correlates with the magnitude of the peak value of the voltage information. The relationship between the peak value of the voltage information and the reference time may be saved in advance in a map format. In this case, the relationship between the peak value of the voltage information and the reference time may be generated based on the voltage information obtained when, for example, a tester or a user performs a trap as a model.

The evaluation unit 220 generates evaluation results of the trap technique based on various indexes derived by the index derivation unit 210. The evaluation result of the trap technique may be generated in any embodiment. For example, the evaluation result of the trap technique may be generated by a binary evaluation such as "good" and "bad", or may be generated by a multi-step evaluation. Further, the evaluation result of the trap technique may be generated separately for each evaluation item. In this case, each evaluation item may correspond to each index.

For example, the evaluation unit 220 evaluates the evaluation result based on the relationship between the ball contact area calculated by the ball contact area calculation unit 211 and a reference area (predetermined reference area) suitable for buffering the momentum of the ball. To generate. In this case, the evaluation unit 220 generates an evaluation result relating to the ball contact region in such a manner that the higher the degree of coincidence between the ball contact region and the reference region, the higher the evaluation.

Further, the evaluation unit 220 generates an evaluation result based on the relationship between the contact time calculated by the contact time calculation unit 212 and the reference time calculated by the reference time calculation unit 215. In this case, the evaluation unit 220 generates an evaluation result related to the contact time in such a manner that the higher the degree of agreement between the contact time and the reference time, the higher the evaluation.

Further, the evaluation unit 220 generates an evaluation result based on the relationship between the contact area calculated by the contact area calculation unit 213 and the reference area suitable for buffering the momentum of the ball (predetermined reference area). do. In this case, the evaluation unit 220 generates an evaluation result relating to the contact area in such a manner that the higher the degree of agreement between the contact area and the reference area, the higher the evaluation. As with the reference time, the reference area may be set in a different manner depending on the ball speed at the time of trapping.

Further, the evaluation unit 220 generates an evaluation result based on the relationship between the ball center movement distance calculated by the ball center movement distance calculation unit 214 and the reference distance (predetermined reference distance) when the trap is successful. do. In this case, the evaluation unit 220 generates an evaluation result in such a manner that the higher the degree of coincidence between the ball center movement distance and the reference distance, the higher the evaluation.

Alternatively, the evaluation unit 220 may calculate the evaluation score using a plurality of indexes. For example, if the evaluation point of the trap technique is V, the evaluation can be performed by the following function.
V = f (t, S, d) Equation (1)
Here, t is the contact time, S is the contact area, and d is the ball center movement distance. f is a function adapted to be the highest point (for example, 15 points) when each value of t, S, and d when the trap is successful is substituted.

The evaluation result output unit 230 outputs the evaluation result by the evaluation unit 220 to, for example, a display as evaluation information. The display is, for example, a display connected to the processing device 100. For example, when the processing device 100 is a processing device of a smartphone, the display is the display of the smartphone.

[motion]
When trapping the ball, it can be any part of the body (other than the arm), but as a particularly practical one, when the ball has a relatively strong momentum and receives a long pass with a high trajectory. There is a chest trap that I use a lot. What is commonly said as a trap point is
Point 1: When the ball hits the chest, pull the upper body slightly backward according to the momentum of the ball Point 2: Keep the balance when pulling the upper body backward Point 3: Trap under either the left or right collarbone However, in the past, in order to learn chest traps, only repeated practice based on the advice of the instructor, and there is no useful evaluation method for learning trap techniques.

In this regard, according to this embodiment, it is possible to output information (evaluation information) representing the evaluation result of the trap technique. This makes it possible to visualize the trap technology. As a result, the user can determine the level of his / her own trap based on the evaluation information, which can be useful for improving the trap technique.

Specifically, in the soccer wear W used in competitions and practice, a fiber having piezoelectricity is arranged as a piezoelectric portion 11 at least on the front side of the body, and the ball comes into contact with the soccer wear W in the piezoelectric portion 11. At that time, a voltage is generated (an electromotive force is generated according to the momentum of the ball). The trap technique can be comprehensively evaluated by calculating each index such as the contact time and the contact area of the ball based on the voltage information from the piezoelectric portion 11.

When the piezoelectric portion 11 is provided in the soccer spats instead of the soccer wear W, it is possible to output information (evaluation information) representing the evaluation result of the trap technique relating to the thigh trap. Similarly, when the soccer shoe is provided with the piezoelectric portion 11, it is possible to output information (evaluation information) representing the evaluation result of the trap technique relating to the foot trap.

Next, the correlation between each index and the trap technique will be described with reference to FIGS. 5 to 7.

FIG. 5 is an explanatory diagram of a test method, and FIGS. 6 and 7 are diagrams showing test results. FIG. 6 is a graph in which the ball velocity at the time of trap is taken on the horizontal axis and the contact area is taken on the vertical axis, and the characteristic 601 of the A group and the characteristic 602 of the B group, which will be described later, are compared. FIG. 7 is a graph in which the ball control distance [m] is plotted on the horizontal axis, the score is plotted on the vertical axis, and the results are plotted.

The subject group consists of 5 male university students (height 1.712 ± 0.05 m, weight 65.1 ± 5.8 kg, age 22.1 ± 1) who have more than 6 years of soccer competition experience and play soccer at least once a week. Group A consisting of 6 years old) and 5 male college students (height 1.67 ± 0.06 m, weight 66.7 ± 7.8 kg, age 22.3 ± 2.1 years old) with less than 1 year of soccer experience It was the B group. After the subject was sufficiently warmed up, a ball (AS565 manufactured by Adidas, mass 0.426 kg, air pressure 9.7 psi) launched from a soccer ball launching machine 500 (M1800 manufactured by JUGS) was placed outdoors on the chest. The operation of trapping was carried out.

As shown in FIG. 2, the subject wore a soccer wear W having piezoelectric fibers (piezoelectric lines manufactured by Mitsui Chemicals) arranged in a grid pattern at 1 cm intervals on the front surface and equipped with an amplifier circuit using an operational amplifier.

The soccer ball launching machine 500 was placed at a position 16 m from the subject, and the angle of incidence of the ball on the trial position was set to be constant between each speed condition. A total of 15 contact experiments were conducted, 5 times each under the conditions of a ball speed of 9.0 m / s, 15.0 m / s, and 20.0 m / s.

A soccer ball (ADIDAS, AS565, mass 0.426 kg, air pressure 9.7 psi) has multiple marks on the ball surface, and three high-speed cameras 501 (Casio Computer EX-F1 600 fps) are used for trapping. It was photographed using the image, and digitized using image analysis software (Flame-DIAS IV manufactured by DKH).

Based on the image of the high-speed camera 501, the superiority or inferiority of the trap operation was evaluated by a person based on how far the ball can be controlled from the body after the ball touches the body. At this time, if the ball hits, leaves, or moves to the rear of the body where the ball cannot be controlled after the trap, it is considered as a failure.

When the subject moves other than the trap operation during the experiment, bending stress is generated in the fiber having piezoelectricity, so that an unintended voltage signal is generated, but the voltage is compared with that generated by contact with the ball. It was also found that it was possible to cut it into small pieces.

Under the conditions of this experiment, it was found from the comparison with the experimental video that it can be judged that the ball touched when the magnitude of the voltage when the power supply voltage of the operational amplifier was 3.3 V exceeded 1.2 V. ..

In the evaluation of the trap, first, three arbitrary outermost points where a voltage exceeding 1.2 V was generated were selected, and the center coordinates of the circle (contact region) passing through the three points were calculated. Here, the contact area changes with time, but the center coordinates are calculated for each sampling time, and the movement locus in the plane coordinates of the center point is calculated in the time range in which the balls are in contact. The contact area was uniquely determined at the time when the area was the largest. The timing of occurrence of the maximum value of the contact area was almost the same as the midpoint detected as the contact time.

From the experiment, in both groups A and B, the larger the ball velocity at the time of trapping, the larger the contact area of the ball, and a positive correlation was obtained (see FIG. 6).

It was also found that in Group A, which has abundant soccer experience, the longer the contact time and the smaller the ball center movement distance, the shorter the ball bounces. That is, it was found that the smaller the ball center movement distance, the lower the rate of trap failure (see Maruuchi of failure in FIG. 7).

Similarly, mainly from the results of Group B, it was found that the shorter the contact time and the larger the ball center movement distance, the higher the rate of failure of trapping.

From the results of this experiment, it was found that if the contact time is about 250 msec or more and the center coordinate movement distance of the ball is 3 cm or less, the trap is successful with a probability of about 90%.

Here, using the above equation (1), it was evaluated so that each of the points of the contact area, the contact time, and the ball center movement distance would be a maximum of 5 points. FIG. 7 shows the relationship between the score (evaluation score) scored based on this and the ball control distance. From FIG. 7, it can be seen that the smaller the ball control distance, the higher the score, and the trap operation that failed is less than 4 points in the evaluation. From the above, it can be seen that the trap technique can be evaluated by the equation (1).

As described above, it can be seen that each index such as the above-mentioned contact area, contact time, and ball center movement distance correlates with the trap technique. According to this embodiment, the trap technique can be evaluated with high accuracy by using such an index.

Next, an operation example of the trap technology evaluation device 1 of this embodiment will be described.

FIG. 8 is a schematic flowchart illustrating an operation example of the trap technology evaluation device 1. The process shown in FIG. 8 may be executed at predetermined intervals corresponding to, for example, the sampling period of voltage information.

In step S802, the processing device 100 acquires voltage information.

In step S804, the processing device 100 determines whether or not the trap flag is “0”. The trap flag is a flag that is set to "1" when the user's trap is started and reset to "0" when the trap ends. If the determination result is "YES", the process proceeds to step S806, and if not, the process proceeds to step S816.

In step S806, the processing apparatus 100 determines whether or not the evaluation flag is “0”. The evaluation flag is a flag that is set to "1" when the user's trap is started and reset to "0" when the evaluation of the trap is completed. If the determination result is "YES", the process proceeds to step S808, and if not, the process proceeds to step S824.

In step S808, the processing apparatus 100 determines whether or not the trap has been started based on the voltage information obtained in step S802. In FIG. 8, as an example, the processing device 100 determines that the trap has started when the ball contact area calculated by the ball contact area calculation unit 211 becomes the predetermined area A1 or more. If the determination result is "YES", the process proceeds to step S810, and in other cases, the processing of the current cycle ends.

In step S810, the processing device 100 sets the trap flag to “1”.

In step S812, the processing apparatus 100 sets the evaluation flag to “1”.

In step S814, the processing apparatus 100 stores the current time point t1.

In step S816, the processing device 100 determines whether or not the trap has ended. In FIG. 8, as an example, the processing device 100 determines that the trap has ended when the ball contact area calculated by the ball contact area calculation unit 211 becomes less than the predetermined area A2. If the determination result is "YES", the process proceeds to step S820, and if not, the process proceeds to step S818.

In step S818, the processing device 100 stores the voltage information obtained in step S802 of this cycle in a predetermined memory area (not shown).

In step S820, the processing device 100 resets the trap flag to “0”.

In step S822, the processing apparatus 100 stores the current time point t2.

In step S824, the processing device 100 executes the evaluation information generation process based on the voltage information (voltage information stored in the predetermined memory area) stored in step S818 and the like. An example of the evaluation information generation process will be described later with reference to FIG.

In step S826, the processing device 100 resets the evaluation flag to “0”.

In step S828, the processing device 100 erases the voltage information (voltage information stored in step S818) from the predetermined memory area.

In step S830, the processing apparatus 100 outputs evaluation information based on the evaluation result obtained in the evaluation information generation process of step S824.

FIG. 9 is a schematic flowchart showing an example of the evaluation information generation process executed in step S824 of FIG.

In step S900, the contact time calculation unit 212 calculates the contact time based on the time point t1 obtained in step S814 and the time point t2 obtained in step S822. For example, the contact time calculation unit 212 calculates the contact time with the contact time = t2-t1.

In step S902, the processing device 100 reads out the voltage information in the predetermined memory.

In step S904, the ball contact area calculation unit 211 calculates the ball contact area at each time point from the time point t1 to the time point t2 based on the voltage information read in step S902.

In step S906, the contact area calculation unit 213 calculates the area related to the maximum ball contact area as the contact area based on the ball contact area obtained in step S904.

In step S908, the reference time calculation unit 215 calculates the reference time. The method of calculating the reference time is as described above.

In step S910, the ball center movement distance calculation unit 214 calculates the movement distance of the center of the ball contact area from the time point t1 to the time point t2 as the ball center movement distance based on the ball contact area obtained in step S904. In this case, the ball center movement distance may be a distance along the movement locus of the center of the ball contact region from the time point t1 to the time point t2, or from the center of the ball contact area at the time point t1 to the time point t2. It may be a linear distance to the center of the ball contact area of.

In step S912, the evaluation unit 220 generates an evaluation result of the trap technique based on each index obtained in step S900 and steps S904 to S910.

According to the processes shown in FIGS. 8 and 9, evaluation information can be output based on the voltage information obtained in real time. As described above, in the modified example, the evaluation information can be output offline based on the accumulated voltage information. For example, evaluation information may be generated for each trap based on the voltage information related to a plurality of traps.

Although each embodiment has been described in detail above, the present invention is not limited to a specific embodiment, and various modifications and changes can be made within the scope of the claims. It is also possible to combine all or a plurality of the components of the above-described embodiment.

For example, in the above-described embodiment, the evaluation information may be generated using sensor information from another sensor (that is, a sensor other than the piezoelectric unit 11) in addition to the voltage information. For example, the other sensor may be an accelerometer or a gyro sensor that can be worn on the waist of the user. In this case, evaluation information may be generated using the movement of the position of the center of gravity of the user as another index. For example, evaluation information may be generated in such a manner that an evaluation point is added if the lower limbs of the user are stable.

Further, the back surface of the soccer wear W may be formed of fibers for detecting expansion and contraction. In this case, the expansion / contraction detecting fiber functions as a sensor for detecting the expansion / contraction of the back surface of the soccer wear. In this case, it becomes possible to detect the movement of the upper body when the user traps, and the trap technique can be evaluated in more detail. In addition, it is possible to output advice on how to distract the upper body as evaluation information. As the expansion / contraction detection fiber, a woven fabric composed of a two-layer structure yarn (covering yarn) having a conductive yarn as a core and a non-conductive yarn as a sheath can be used. A woven fabric using a two-layer structure yarn can detect expansion and contraction of the back surface of soccer wear by utilizing the change in capacitance between the warp yarn and the weft yarn when compressed or stretched and deformed.
It is desirable that the expansion / contraction detecting fiber is in close contact with the body surface, and the compression type inner wear that is separate from the soccer wear W may be used.
Alternatively, an inertial sensor or the like may be used as long as it can detect the movement of the upper body.

Further, in the above-described embodiment, when the processing device (processing device other than the processing device 100) is mounted on the soccer wear W, a part of the functions of the processing device 100 is realized by the processing device mounted on the soccer wear W. May be done.

Further, in the above-described embodiment, the processing device 100 may be in the form of a system including both a server and a terminal device (for example, a personal computer or a smartphone) owned by the user. In this case, the server and the terminal device owned by the user are connected via a network such as the Internet. In this case, the voltage information acquisition unit 202, the index derivation unit 210, and the evaluation unit 220 shown in FIG. 4 may be realized by the server side, and the evaluation result output unit 230 may be realized by the terminal device side owned by the user. You may. In this case, the output unit 12 transmits the sensor information to the server.

Further, in the above-described embodiment, the trap technology evaluation device 1 is provided with the piezoelectric unit 11, but instead of the piezoelectric unit 11, another sensor for detecting pressure, for example, a capacitance detection type or a resistance change detection type, is used. A sensor may be provided.

Further, in the above-described embodiment, the output unit 12 has been described as being configured as a communication unit, but the present invention is not limited to this, and for example, the output unit 12 is configured as a storage unit for storing voltage information in a detachable memory card. Then, the drive device 104 of the processing device 100 may read the information of the memory card in which the voltage information is stored.

The inventions described in the claims originally attached to the application of this application are described below. The claims described in the appendix are the scope of the claims originally attached to the application for this application.
<Claim 1>
A pressure detector located on at least one of soccer wear, soccer spats, and soccer shoes.
A trap technology evaluation device including an output unit that outputs information indicating an evaluation result of the trap technology when a user wearing the soccer equipment traps a ball based on the data output by the pressure detection unit.
<Claim 2>
The pressure detection unit is a piezoelectric unit.
The first aspect of the present invention is characterized in that the output unit outputs information representing an evaluation result of a trap technique when a user wearing the soccer equipment traps a ball, based on the voltage output by the piezoelectric unit. The trap technology evaluation device described.
<Claim 3>
Further including an index derivation unit for deriving an index related to the user's trap technology based on the voltage output by the piezoelectric unit.
The trap technology evaluation device according to claim 2, wherein the output unit outputs the information based on the index derived by the index derivation unit.
<Claim 4>
The trap technology evaluation device according to claim 3, wherein the index derivation unit derives the movement mode of the position where the ball is in contact with the soccer equipment as the index.
<Claim 5>
The trap technology evaluation device according to claim 3 or 4, wherein the index derivation unit derives the area of contact of the ball in the soccer equipment as the index.
<Claim 6>
The trap technology evaluation device according to any one of claims 3 to 5, wherein the index derivation unit derives the duration of the state in which the ball is in contact with the soccer equipment as the index.
<Claim 7>
The trap technology evaluation device according to claim 6, wherein the index derivation unit derives a reference time required for buffering the momentum of the ball as the index.
<Claim 8>
The trap technology evaluation device according to claim 7, wherein the output unit evaluates the trap technology of the user based on the relationship between the duration and the reference time.
<Claim 9>
The soccer equipment includes soccer wear, and the soccer equipment includes soccer wear.
The trap technology evaluation device according to any one of claims 2 to 8, wherein the piezoelectric portion is arranged on the front surface side of the body of the soccer wear.
<Claim 10>
The trap technology evaluation device according to claim 9, wherein the back surface of the soccer wear is further provided with a fiber for detecting expansion and contraction.
<Claim 11>
It ’s a soccer device,
Forming at least one of soccer wear, soccer spats, and soccer shoes,
Pressure detector and
Information that represents the evaluation result of the trap technology when the user wearing the soccer equipment traps the ball by using the data output by the pressure detection unit or the index that can be derived from the data and is related to the user's trap technology. A soccer device including an output unit that outputs data to an external device that generates data based on the data or the index.
<Claim 12>
A pressure detector is placed on at least one soccer device of soccer wear, soccer spats, and soccer shoes, and a user wearing the soccer device puts the ball on the ball based on the data output by the pressure detector. A trap technology evaluation method that outputs information that represents the evaluation results of the trap technology when trapping.

1 Trap technology evaluation device 11 Piezoelectric unit 12 Output unit 21 Fiber 100 Processing device 202 Voltage information acquisition unit 210 Index derivation unit 211 Ball contact area calculation unit 212 Contact time calculation unit 213 Contact area calculation unit 214 Ball center movement distance calculation unit 215 Reference Time calculation unit 220 Evaluation unit 230 Evaluation result output unit 500 Soccer ball launch machine 501 High-speed camera W Soccer wear

Claims (12)

A pressure detector located on at least one of soccer wear, soccer spats, and soccer shoes.
A trap technology evaluation device including an output unit that outputs information indicating an evaluation result of the trap technology when a user wearing the soccer equipment traps a ball based on the data output by the pressure detection unit. The pressure detection unit is a piezoelectric unit.
The first aspect of the present invention is characterized in that the output unit outputs information representing an evaluation result of a trap technique when a user wearing the soccer equipment traps a ball, based on the voltage output by the piezoelectric unit. The trap technology evaluation device described. Further including an index derivation unit for deriving an index related to the user's trap technology based on the voltage output by the piezoelectric unit.
The trap technology evaluation device according to claim 2, wherein the output unit outputs the information based on the index derived by the index derivation unit. The trap technology evaluation device according to claim 3, wherein the index derivation unit derives the movement mode of the position where the ball is in contact with the soccer equipment as the index. The trap technology evaluation device according to claim 3 or 4, wherein the index derivation unit derives the area of contact of the ball in the soccer equipment as the index. The trap technology evaluation device according to any one of claims 3 to 5, wherein the index derivation unit derives the duration of the state in which the ball is in contact with the soccer equipment as the index. The trap technology evaluation device according to claim 6, wherein the index derivation unit derives a reference time required for buffering the momentum of the ball as the index. The trap technology evaluation device according to claim 7, wherein the output unit evaluates the trap technology of the user based on the relationship between the duration and the reference time. The soccer equipment includes soccer wear, and the soccer equipment includes soccer wear.
The trap technology evaluation device according to any one of claims 2 to 8, wherein the piezoelectric portion is arranged on the front surface side of the body of the soccer wear. The trap technology evaluation device according to claim 9, wherein the back surface of the soccer wear is further provided with a fiber for detecting expansion and contraction. It ’s a soccer device,
Forming at least one of soccer wear, soccer spats, and soccer shoes,
Pressure detector and
Information that represents the evaluation result of the trap technology when the user wearing the soccer equipment traps the ball by using the data output by the pressure detection unit or the index that can be derived from the data and is related to the user's trap technology. A soccer device including an output unit that outputs data to an external device that generates data based on the data or the index. A pressure detector is placed on at least one soccer device of soccer wear, soccer spats, and soccer shoes, and a user wearing the soccer device puts the ball on the ball based on the data output by the pressure detector. A trap technology evaluation method that outputs information that represents the evaluation results of the trap technology when trapping.

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