JP2016083063A - Evaluation value calculation program, evaluation value calculation method, and information processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To digitize the skills of athletic ability.SOLUTION: An evaluation value calculation program makes a computer execute a step for storing first acceleration data showing the acceleration of a slider in a shoulder width direction obtained when the slider sliding by using an exercise device performs at least one right and left turn, and a step for calculating an evaluation value showing the skills of the slider's turn by using the first acceleration data.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an evaluation value calculation program, an evaluation value calculation method, and an information processing apparatus.

  There is a device that measures the movement of a person who performs exercise such as skiing with a small sensor such as an acceleration sensor, and quantifies various types of human movement information.

JP 2014-97104 A

However, by using a small sensor such as an acceleration sensor, various types of motion information (for example, acceleration) of a user wearing the small sensor can be quantified. It is difficult to intuitively understand if it makes sense. This is because the exercise information itself measured by the small sensor does not directly represent the skill of the exercise skill. Quantifying motor skills based on quantified data is difficult and rarely done.
It is an object of the technology disclosed herein to quantify the skill of athletic skills.

The disclosed technology employs the following means in order to solve the above-described problems.
That is, the first aspect is
On the computer,
Storing first acceleration data indicating acceleration in the shoulder width direction of the rider obtained by the rider sliding using the exercise equipment making at least one left and right turn;
Calculating an evaluation value indicating the skill of the rider's turn using the first acceleration data;
An evaluation value calculation program for executing

  The configuration of the disclosure can be specified as an information processing apparatus including means for executing the processing of each step of the program in the above-described aspect, or a computer-readable recording medium that records the program. Further, the disclosed configuration may be specified by a method in which the information processing apparatus executes the process executed by each step described above. The configuration of the disclosure may be specified as a system including an information processing apparatus that performs the process executed by each step described above.

  According to the disclosed technique, the skill of the motor skill can be quantified.

FIG. 1 is a diagram illustrating a configuration example of a terminal device according to the present embodiment. FIG. 2 is a diagram illustrating a hardware configuration example of the information processing apparatus. FIG. 3 is a diagram illustrating an example of an operation flow of the terminal device according to the present embodiment. FIG. 4 is a diagram illustrating an example in which a terminal device including a measurement acceleration sensor is attached to a user who is a skier. FIG. 5 is a diagram illustrating an example of acceleration data acquired by the acquisition unit. FIG. 6 is a diagram illustrating an example of a graph of a temporal change in x-direction acceleration. FIG. 7 is a diagram illustrating an example in which x-direction acceleration and y-direction acceleration are plotted on XY coordinates.

Hereinafter, embodiments will be described with reference to the drawings. The configuration of the embodiment is an exemplification, and the disclosed configuration is not limited to the specific configuration of the disclosed embodiment. In implementing the disclosed configuration, a specific configuration according to the embodiment may be appropriately employed.
Embodiment

  The apparatus according to the present embodiment calculates an evaluation value indicating the skill of the user (examinee) 's motor skill based on the acceleration of the user during the exercise. The acceleration during the exercise of the user is acquired by, for example, a mobile terminal including an acceleration sensor worn by the user during the exercise. Here, a ski parallel turn is taken as an example of a motor skill, but the motor skill targeted in the present embodiment is not limited to a ski parallel turn. , Step turn, etc.). The exercise skill to be targeted in the present embodiment is not limited to ski skill, but may be an exercise skill to slide by wearing exercise equipment such as a snowboard or a glass ski.

  A ski parallel turn is a turn performed with the skis parallel. In a parallel turn, a slope is slid while repeating a right turn that changes the direction of sliding from left to right and a left turn that changes direction from right to left.

  The apparatus according to the present embodiment calculates the evaluation values of the tempo, symmetry, and dynamicity of the parallel turn of the ski based on the acceleration value by the acceleration sensor worn by the user who is a skier. The calculated evaluation value depends on the skill of the motor skill. The tempo, symmetry, and dynamic will be described later.

(Configuration example)
FIG. 1 is a diagram illustrating a configuration example of a terminal device according to the present embodiment. The terminal device 100 includes an acquisition unit 102, a calculation unit 104, an input unit 106, a communication unit 108, a storage unit 110, and an output unit 112.

  The acquisition unit 102 acquires acceleration data and the like measured by the acceleration sensor during the exercise of the digitization target from the input unit 106, the storage unit 110, an external device, and the like. The acquisition unit 102 may include an acceleration sensor. The acceleration sensor measures accelerations in three directions orthogonal to each other. When the acquisition unit 102 includes an acceleration sensor, the acceleration acquired by the acceleration sensor when the user exercises is acquired as acceleration data.

  The calculation unit 104 calculates an evaluation value of tempo, symmetry, and dynamics indicating exercise skills from the acceleration data acquired by the acquisition unit 102 and the like.

The input unit 106 receives an instruction from the user and an input of acceleration data measured during the exercise of the digitization target.
The communication unit 108 performs communication with an external device or the like via a network or the like.

  The storage unit 110 stores data input by the input unit 106, acceleration data measured during the exercise of the digitization target, tempo, symmetry, dynamicity, and the like indicating the exercise skill calculated by the calculation unit 104.

  The output unit 112 displays information to be notified to the user, such as tempo, symmetry, and dynamicity indicating the exercise skill calculated by the calculation unit 104. The output unit 112 outputs a sound at a predetermined tempo that is heard by a user who wears the exercise equipment and slides.

The terminal device 100 is realized using a dedicated or general-purpose computer such as a PC (Personal Computer), a workstation (WS, Work Station), a smartphone, a mobile phone, and a tablet terminal, or an electronic device equipped with the computer. Is possible.

  FIG. 2 is a diagram illustrating a hardware configuration example of the information processing apparatus. The information processing apparatus shown in FIG. 2 has a general computer configuration. The terminal device 100 is realized by an information processing apparatus 1000 as shown in FIG. The information processing apparatus 1000 in FIG. 2 includes a processor 1002, a memory 1004, a storage unit 1006, an input unit 1008, an output unit 1010, a communication control unit 1012, and a detection unit 1014. These are connected to each other by a bus. The memory 1004 and the storage unit 1006 are computer-readable recording media. The hardware configuration of the information processing apparatus is not limited to the example illustrated in FIG. 2, and components may be omitted, replaced, or added as appropriate.

  In the information processing apparatus 1000, the processor 1002 loads a program stored in a recording medium into a work area of the memory 1004 and executes the program, and each component is controlled through the execution of the program, thereby meeting a predetermined purpose. Function can be realized.

  The processor 1002 is, for example, a CPU (Central Processing Unit) or a DSP (Digital Signal Processor).

  The memory 1004 includes, for example, a RAM (Random Access Memory) and a ROM (Read Only Memory). The memory 1004 is also called a main storage device.

The storage unit 1006 includes, for example, an EPROM (Erasable Programmable ROM), a hard disk drive (HDD, Hard Disk Drive), and a solid state drive (SSD, Solid
State drive). The storage unit 1006 can include a removable medium, that is, a portable recording medium. The removable media is, for example, a USB (Universal Serial Bus) memory or a disc recording medium such as a CD (Compact Disc) or a DVD (Digital Versatile Disc). The storage unit 106 is also called a secondary storage device.

  The storage unit 1006 stores various programs, various data, and various tables in a recording medium in a readable and writable manner. The storage unit 1006 stores an operating system (OS), various programs, various tables, and the like. Information stored in the storage unit 1006 may be stored in the memory 1004. In addition, information stored in the memory 1004 may be stored in the storage unit 1006.

  The operating system is software that mediates software and hardware, manages memory space, manages files, manages processes and tasks, and the like. The operating system includes a communication interface. The communication interface is a program for exchanging data with other external devices connected via the communication control unit 1012. Examples of the external device include other information processing devices and external storage devices.

  The input unit 1008 includes a keyboard, a pointing device, a wireless remote controller, a touch panel, and the like. The input unit 1008 may include a video / image input device such as a camera, and an audio input device such as a microphone.

The output unit 1010 includes a display device such as a CRT (Cathode Ray Tube) display, an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), and an EL (Electroluminescence) panel, and an output device such as a printer. The output unit 1010 can include an audio output device such as a speaker.

  The communication control unit 1012 is connected to another device and controls communication between the information processing apparatus 1000 and the other device. The communication control unit 1012 is, for example, a LAN (Local Area Network) interface board, a wireless communication circuit for wireless communication, or a communication circuit for telephone communication. The LAN interface board and the wireless communication circuit are connected to a network such as the Internet.

  The detection unit 1014 includes a detection device such as an acceleration sensor that detects acceleration of movement of the information processing apparatus 1000. The acceleration sensor measures accelerations in three directions orthogonal to each other. The acceleration sensor can detect the acceleration of the movement of the body by mounting the information processing apparatus 1000 including the acceleration sensor on the body.

  The computer that implements the terminal device 100 loads the program stored in the secondary storage device into the main storage device and executes it, whereby the acquisition unit 102, the calculation unit 104, the input unit 106, the communication unit 108, The function as the output unit 112 is realized. On the other hand, the storage unit 110 is provided in a storage area of the main storage device or the secondary storage device.

  A series of processing can be executed by hardware, but can also be executed by software.

  The step of describing the program includes processes that are executed in parallel or individually even if they are not necessarily processed in time series, as well as processes that are executed in time series in the described order. Some of the steps describing the program may be omitted.

(Operation example)
In order to quantify the motion of the user who is a skier, an acceleration sensor is attached to the user, and the acceleration of the user's movement during the parallel turn of the ski is measured. Further, an evaluation value indicating the skill of the motor skill is calculated using the acceleration of the movement.

FIG. 3 is a diagram illustrating an example of an operation flow of the terminal device according to the present embodiment.
In step S101, the acquisition unit 102 of the terminal device 100 measures, with an acceleration sensor, a motion acceleration at a predetermined sampling frequency when a skier user (slider) wears the terminal device 100 and slides in a parallel turn. Then, the acceleration data indicating the time change of the acceleration is acquired.

FIG. 4 is a diagram illustrating an example in which a terminal device including a measurement acceleration sensor is attached to a user who is a skier. The portable terminal for measurement is worn on the user's back during measurement. The portable terminal is fixed so as not to move with respect to the user's body. The position where the user who is a skier wears the portable terminal may be a body torso (for example, a chest) other than the back. FIG. 4A is a view of the user as seen from the front. FIG. 4B is a view of the user as viewed from the left side. The direction from the left side of the user's body to the right side (also referred to as the shoulder width direction) is the x direction, and the body center (for example, the center of the line connecting the left and right sides of the body) to the head direction (the body axis direction). The portable terminal is attached to the user's body so that the direction from the back to the front of the body is the z direction. The x direction, the y direction, and the z direction are orthogonal to each other. The directions of the x direction, the y direction, and the z direction may be opposite directions. When the user stands upright on a level ground, x
The direction is parallel to the horizontal direction, and the y direction is parallel to the vertical direction.

  The acceleration sensor measures acceleration in the x direction, the y direction, and the z direction. The accelerations in the x direction, y direction, and z direction are referred to as x direction acceleration, y direction acceleration, and z direction acceleration, respectively. The acceleration data measured by the acceleration sensor is stored in the terminal device 100 together with time information indicating the time at which the acceleration is measured. The acceleration is sampled at a predetermined cycle. As the sampling frequency, a value sufficiently large with respect to the speed of movement of the user is adopted. The sampling frequency is 200 Hz, for example.

  A user who is a skier slides while performing a parallel turn using skis which are exercise equipment. At this time, the user wears the terminal device 100 including the acceleration sensor on the back. The acquisition unit 102 of the terminal device 100 measures acceleration in three directions while the user is performing a parallel turn. The terminal device 100 uses a speaker built in the terminal device 100, an earphone connected to the terminal device 100, or the like to perform a parallel turn on a sound of a predetermined tempo (for example, 60 times per minute (60 bpm)). To ask. The tempo of the sound heard by the user is not limited to 60 bpm. For example, a slow tempo may be employed according to the skill level of the user. The user performs a parallel turn in time with the tempo of the sound being heard. That is, the user repeats the right turn and the left turn of the parallel turn according to the tempo of the sound being heard. The terminal device 100 may notify the user of the measurement start timing by voice or the like. The acceleration data measured by the terminal device 100 is stored in the storage unit 110. The terminal device 100 may measure the acceleration at the time of the user's sliding without letting the user hear a sound at a predetermined tempo.

  For example, the acquisition unit 102 may receive and acquire acceleration data from an external device such as a mobile terminal that has measured acceleration in the same manner as the above measurement method by the communication unit 108. The acquisition unit 102 may acquire acceleration data input from the input unit 106. At this time, the terminal device 100 may not include an acceleration sensor. The acquired acceleration data is stored in the storage unit 110.

  FIG. 5 is a diagram illustrating an example of acceleration data acquired by the acquisition unit. As illustrated in FIG. 5, the acquisition unit 102 acquires each piece of acceleration data in the three directions of the x direction, the y direction, and the z direction at each time when the acceleration is measured. When the acceleration sampling frequency is 200 Hz, the acquired acceleration data is data every 1/200 s (0.005 s).

  In step S102, the calculation unit 104 extracts the acceleration data measured when the user made the parallel turn from the storage unit 110 together with time information indicating the time at which the acceleration was measured, and the tempo, symmetry, dynamic An evaluation value is calculated. The evaluation values for tempo, symmetry, and dynamic are numerical values that indicate the skill of parallel ski turns. The tempo, symmetry, and dynamic will be described later. The acceleration data includes x-direction acceleration, y-direction acceleration, and z-direction acceleration. Here, x-direction acceleration and y-direction acceleration are used.

  When skiing, the direction from the center of the body to the head is almost parallel to the direction of gravity (vertical direction) (the directions are opposite to each other). The + y direction of the y-direction acceleration is the direction from the center of the body to the head. That is, the + y direction is substantially opposite to the direction of gravity (vertical direction). Therefore, an acceleration of approximately −1G (G is gravitational acceleration) due to gravity is added to the y-direction acceleration. Here, the y-direction acceleration is obtained by subtracting −1 G from the measurement result y-direction acceleration to remove the influence of the gravitational acceleration and further reversing the positive and negative. That is, new y-direction acceleration = (y-direction acceleration of measurement result − (− 1G)) × (−1). The new y-direction acceleration is calculated by the calculation unit 104. Hereinafter, the new y-direction acceleration is simply referred to as y-direction acceleration.

・ About the tempo In the ski parallel turn, the skier slides on the slope while repeating the right turn and the left turn. In a parallel turn, it is said that repeating each turn with a certain period is skillful. A user who is a skier to be measured performs a parallel turn so as to match the tempo while listening to a sound of a predetermined tempo at the time of measurement. Therefore, if the tempo of the turn of the user's parallel turn is closer to the predetermined tempo, it is considered to be more skillful. The calculation unit 104 calculates the tempo of each turn from the x-direction acceleration, and calculates a tempo evaluation value that increases as the tempo of each turn approaches the predetermined tempo that the user has heard.

  The calculation part 104 acquires the x direction acceleration at the time of a user making a parallel turn with time information. Turn right until the x-direction acceleration changes from negative to positive until it changes from positive to negative. The time from when the x-direction acceleration changes from positive to negative to the time when the acceleration in the x direction changes from negative to positive is defined as a left turn. One right turn or one left turn is one turn. Of the acquired x-direction acceleration data, for example, the calculation unit 104 uses, as the x-direction acceleration, data from the time when the sign of the x-direction acceleration changes first to the time when the sign of the x-direction acceleration changes last. The calculation unit 104 counts the number of right turns and the number of left turns from the data to be used, and sets the total number of turns to N. Since the acceleration is sampled at a constant period, the number of acceleration data in one turn corresponds to the time during which one turn is performed. The tempo of one turn is the reciprocal of the time of one turn. Therefore, when the sampling frequency is S [Hz] and the number of acceleration data of one turn is V, the tempo of the one turn is calculated as S / V × 60 [bpm]. The calculation unit 104 calculates the tempo of each turn.

The calculation unit 104 obtains the tempo variance for one turn when the turn is performed N times. Let _i be the tempo of the i-th turn. The variance σ of the tempo of one turn when performing N turns is

と求められる。ここで、Ｔは、１ターンの目標とするテンポであって、計測時に利用者に聞かせる音のテンポとして設定したものである。分散σが小さいほど、ターンがテンポＴにより近いテンポで行われていることを意味する。算出部１０４は、この分散σを使用して、テンポの評価値（Tempo Score）を次のように算出する。

Is required. Here, T is the target tempo of one turn, and is set as the tempo of the sound to be heard by the user during measurement. A smaller variance σ means that the turn is performed at a tempo closer to the tempo T. The calculation unit 104 uses this variance σ to calculate the tempo evaluation value (Tempo Score) as follows.

  The tempo evaluation value means that the larger the value, the better the form. The tempo evaluation value is the highest (100 points) when the tempo of each turn matches the target tempo.

  When acceleration is measured without letting the user hear the sound of tempo T at the time of sliding, T may be an average value of the tempo of each turn at the time of calculation of the evaluation value of tempo.

A parallel turn is one cycle with two turns, a right turn and a left turn. Therefore, if one turn is made at a tempo of T, the x-direction acceleration changes with time at a tempo of T / 2. Therefore, when the x-direction acceleration is Fourier transformed, the higher the T / 2 peak height, the closer the 2 / T peak half-value width, the closer the measurement target user is to the tempo of T Means that Therefore, a value based on the height of the T / 2 peak when the x-direction acceleration is Fourier transformed or a value based on the half width of the T / 2 peak may be used as the tempo evaluation value.

  FIG. 6 is a diagram illustrating an example of a graph of a temporal change in x-direction acceleration. In the graph of FIG. 6, the horizontal axis indicates time, and the vertical axis indicates x-direction acceleration. In the graph of FIG. 6, the curve above the time axis indicates the right turn, and the curve below the time axis indicates the left turn. In the upper part of the graph of FIG. 6, the tempo of each turn is described. Since the reciprocal of the turn time corresponds to the tempo, the shorter the turn time, the larger the tempo. Here, the target tempo is set to 60 bpm.

・ Symmetry In the parallel turn of skiing, it is said that it is skillful to slide in the same form on the right turn and the left turn. In other words, the better the form, the more the body movement is targeted in the right turn and the left turn. The calculation unit 104 calculates a symmetry evaluation value from the x-direction acceleration and the y-direction acceleration. The evaluation value of symmetry includes a left-right weight ratio and a left-right weight balance. The right / left weight ratio is a ratio of the magnitude and direction of the weight for pressing the snow surface in each of the left turn and the right turn. The magnitude and direction of the load for pressing the ski are expressed in the x-direction acceleration and the y-direction acceleration. If the magnitude and direction of the load that presses the snow surface are symmetrical between the left and right turns in the left and right turns, it is considered that the aircraft is sliding in a good form. That is, if the x-direction acceleration and the y-direction acceleration are symmetrical between the left and right turns in the left turn and the right turn, it is considered that the aircraft is sliding in a good form. Further, the left-right weighted balance is a balance between the time for making a left turn and the time for making a right turn. It is considered that the closer the time for making the left turn and the time for making the right turn, the better the form.

  The calculation unit 104 acquires the x-direction acceleration and the y-direction acceleration when the user makes a parallel turn together with time information. The calculation unit 104 classifies the acquired acceleration data into a left turn type and a right turn type. That is, the calculation unit 104 classifies the acceleration data with a positive x-direction acceleration as a right turn and a negative x-direction acceleration as a left turn.

  The x-direction acceleration and the y-direction acceleration at time t are respectively x (t) and y (t). The calculation unit 104 takes a point (x (t), y (t)) in the XY coordinates for each measurement time t of the right turn. The calculation unit 104 obtains an approximate straight line passing through the origin (0, 0) for these points. The inclination aR of the approximate straight line is obtained by the following equation. The absolute value of the slope aR of the approximate straight line of the right turn is an example of a characteristic value indicating the characteristic of the right turn.

  Similarly, the calculation unit 104 obtains the slope aL of the approximate straight line passing through the origin for the left turn. The absolute value of the slope aL of the approximate straight line of the left turn is an example of a characteristic value indicating the characteristic of the left turn. Further, the calculation unit 104 obtains a ratio b of the other inclination with respect to one inclination. The ratio b is defined as follows.

算出部１０４は、割合ｂを用いて、左右加重の比率の評価値（Ratio Score）を次のよ
うに求める。左右加重の比率の評価値は、ａＬとａＲとの類似性が高いほど（割合ｂが１に近いほど）、大きくなる。

The calculation unit 104 uses the ratio b to obtain an evaluation value (Ratio Score) of the right / left weight ratio as follows. The evaluation value of the right / left weight ratio increases as the similarity between aL and aR increases (as the ratio b is closer to 1).

  Here, C is a constant not less than 0 and less than 100. C is set to 30, for example. The larger the value of the evaluation value of the left / right weight ratio, the more symmetrical the size and direction of the weight that presses the snow surface, and the better the form. The evaluation value of the right / left weight ratio is the highest (100 points) when the absolute values of the slopes of the approximate straight lines of the left and right turns are the same.

  FIG. 7 is a diagram illustrating an example in which x-direction acceleration and y-direction acceleration are plotted on XY coordinates. In the example of FIG. 7, a point where the x-direction acceleration is positive indicates a right turn, and a point where the x-direction acceleration is negative indicates a left turn. FIG. 7 shows an approximate straight line passing through the origin for the set of right turn points (straight line extending from the origin to the upper right direction) and an approximate straight line passing through the origin for the set of left turn points (straight line extending from the origin to the upper left direction). . In the example of FIG. 7, the slope of the approximate line passing through the origin with respect to the set of points on the right turn is 1.62, and the slope of the approximate line through the origin with respect to the set of points on the left turn is −1.41. . In this example, the evaluation value of the right / left weight ratio is 85 points.

In addition, the calculation unit 104 calculates the time during which the right turn is performed and the time during which the left turn is performed. The time for making the right turn is calculated by counting the number of x-direction accelerations classified as the right turn. The same applies to the time during which a left turn is being made. Here, the number of x-direction accelerations for the right turn is R, and the number of x-direction accelerations for the left turn is L. The calculation unit 104 calculates a left-right weighted balance evaluation value (Balance Score) as in the following equation. The evaluation value of the left-right weight balance increases as the similarity between L and R increases (as L is closer to R).

The larger the value of the left-right weight balance evaluation value, the closer the time for making a right turn and the time for making a left turn, and it is considered that the aircraft is sliding in a better form. The left / right weight balance evaluation value is the highest (100 points) when the left and right turn times are the same.

The calculation unit 104 averages the left-right weighted ratio evaluation value (Ratio Score) and the left-right weighted balance evaluation value (Balance Score), and calculates the symmetry evaluation value (Symmetry Scor as shown in the following equation).
It may be calculated as e).

対称性の評価値の値が大きいほど、左右の対称性がよく、よりよいフォームであることを意味する。

The larger the value of the symmetry evaluation value, the better the left-right symmetry and the better the form.

-Dynamicity When turning back at the right or left end in a parallel turn, the lower the body, the lower the body tilts outwards and looks brilliant. Gliding in a brilliant form is considered a skill. The absolute value of the acceleration in the x direction is maximized when turning back, and this value increases as the speed increases. Therefore, the larger the maximum absolute value of the x-direction acceleration during the right turn and the maximum absolute value of the x-direction acceleration during the left turn, the more brilliant and dynamic it will be. It is thought that there is. The calculation unit 104 calculates a dynamic evaluation value from the x-direction acceleration.

The calculation part 104 acquires the x direction acceleration at the time of a user making a parallel turn. The calculation unit 104 classifies the acquired x-direction acceleration into a left turn type and a right turn type. That is, the calculation unit 104 sets a positive x-direction acceleration as a right turn and a negative x-direction acceleration as a left turn. The calculation unit 104 extracts the one having the maximum absolute value from the x-direction acceleration of the right turn. Moreover, the calculation part 104 extracts the thing with the largest absolute value from the x direction acceleration of a left turn. The calculation unit 104 sets the maximum absolute value of the x-direction acceleration for the right turn to R _max and the maximum absolute value of the x-direction acceleration for the left turn to L _max . The calculation unit 104 calculates a dynamic evaluation value (Dynamic Score) indicating the dynamics of the parallel turn as follows.

Even if you are an expert, the absolute value of acceleration in the x direction will not exceed 2G (19.6 m / s ² ). It is assumed that the absolute value of acceleration is 2G.
A larger value of the evaluation value of dynamic means that the movement is dynamic and a better form.
Further, the calculation unit 104 may calculate the dynamic evaluation value by setting the average of the right turn peak as R _max and the average of the left turn peak as L _max .

  In step S103, the output unit 112 of the terminal device 100 displays the value of each evaluation value calculated in step S102 in order to notify the user. The output unit 112 may display the tempo evaluation value together with a graph as shown in FIG. By displaying together with the graph as shown in FIG. 6, the user can determine whether the tempo is shifted at the start of sliding, whether the tempo is shifted at the end of sliding, whether the tempo on the right side is shifted, or whether the tempo on the left side is shifted. It is possible to easily visually recognize whether or not there is a shift. Further, the output unit 112 may display the evaluation value of the right / left weight ratio together with the graph as shown in FIG. By displaying together with the graph as shown in FIG. 7, the user can visually recognize the deviation of symmetry during the turn.

  For a plurality of riders, acceleration data measured by a portable terminal or the like worn by the rider at the time of a ride is acquired by the terminal device 100, and evaluation values of tempo, symmetry, and dynamicity for each rider are obtained. It may be calculated and displayed. The terminal device 100 acquires acceleration data of a plurality of riders via a communication network including the mobile terminal and the terminal device 100. The terminal device may acquire acceleration data of a plurality of riders via a recording medium. The terminal device 100 displays, for example, the evaluation values of the motor skills of a plurality of riders so that each of the runners can compare their motor skills with those of other people, It can be used to improve.

(Operation and effect of the embodiment)
The terminal device 100 uses the x-direction acceleration and the y-direction acceleration measured when the user makes a ski parallel turn to calculate the evaluation values of tempo, symmetry, and dynamicity that indicate the skill of the parallel turn. And output.

  Conventionally, the time change of acceleration, which indicates the movement when exercising, has been measured, but if you just look at the value of the time change of acceleration or the time change of the speed integrated with the acceleration, the skill of the exercise can be reduced. It was difficult to recognize. According to the terminal device 100 of this embodiment, the skill of the parallel turn is given to the user by calculating the evaluation value indicating the skill of the parallel turn based on the time change of the acceleration measured when the parallel turn is performed. An evaluation value that can be recognized intuitively can be presented. Further, the user can know the skill level of his / her ski from the evaluation value indicating the skill of the parallel turn. The user can objectively confirm the improvement degree of the skill by observing a change with time of the evaluation value indicating the skill of the parallel turn.

  In this embodiment, since the acceleration of the rider is measured by an acceleration sensor attached to the rider who skis on the ski, the rider does not restrain the rider's body using a large-scale experimental facility at the time of measurement. It is possible to acquire acceleration data indicating the movement of the.

100 terminal device
102 Acquisition unit
104 Calculation unit
106 Input section
108 Communication Department
110 Storage
DESCRIPTION OF SYMBOLS 112 Output part 1000 Information processing apparatus 1002 Processor 1004 Memory 1006 Storage part 1008 Input part 1010 Output part 1012 Communication control part 1014 Detection part

Claims (10)

On the computer,
Storing first acceleration data indicating acceleration in the shoulder width direction of the rider obtained by the rider sliding using the exercise equipment making at least one left and right turn;
Calculating an evaluation value indicating the skill of the rider's turn using the first acceleration data;
An evaluation value calculation program for executing The evaluation value calculation program according to claim 1, wherein in the step of calculating the evaluation value, the computer calculates an evaluation value of the tempo of the turn based on the first acceleration data. The first acceleration data indicates an acceleration in a shoulder width direction when the runner makes a left or right turn while listening to a sound of a predetermined tempo,
In the step of calculating the evaluation value, the computer calculates a variance of the reciprocal of the time length of one turn of the turn with respect to the predetermined tempo based on the first acceleration data. The evaluation value calculation program according to claim 2, wherein an evaluation value of the tempo of the corresponding turn is calculated. In the computer,
In the storing step, the second acceleration data indicating the acceleration in the body axis direction of the rider obtained by performing the turn is further stored,
The evaluation value calculation according to any one of claims 1 to 3, wherein in the step of calculating the evaluation value, an evaluation value of symmetry of the turn is calculated based on the first acceleration data and the second acceleration data. program. In the step of calculating the evaluation value in the computer, the first acceleration data and the second acceleration data are used as the first acceleration data and the second acceleration data are used as the right turn acceleration data and the left turn acceleration data. According to the similarity between the right turn feature value and the left turn feature value, a right turn feature value indicating the right turn feature and a left turn feature value indicating the left turn feature are calculated. The evaluation value calculation program according to claim 4, wherein a first evaluation value of symmetry of the turn is calculated. In the step of calculating the evaluation value in the computer, the first acceleration data and the second acceleration data are used as the first acceleration data and the second acceleration data are used as the right turn acceleration data and the left turn acceleration data. According to the similarity between the time of making the right turn and the time of making the left turn, the time for making the right turn and the time for making the left turn are calculated. The evaluation value calculation program according to claim 4 or 5, wherein a second evaluation value of symmetry of the turn is calculated. The evaluation value calculation program according to any one of claims 1 to 6, wherein in the step of calculating the evaluation value, the computer calculates an evaluation value of dynamics of the turn based on the first acceleration data. In the step of calculating the evaluation value, the computer calculates the absolute value of the absolute value of the acceleration of the right turn and the maximum value of the acceleration of the left turn based on the first acceleration data, The evaluation value calculation program according to claim 7, wherein the evaluation value of the dynamic value of the turn according to the magnitude of the absolute value of the absolute value of the acceleration of the right turn and the absolute value of the acceleration of the left turn is calculated. Computer
Storing the first acceleration data in the shoulder width direction obtained by a rider who makes a slide using athletic equipment making at least one left and right turn;
Calculating an evaluation value indicating the skill of the rider's turn using the first acceleration data;
A method for calculating the evaluation value of the rider's turn technique. A storage device for storing first acceleration data in the width direction of the shoulder obtained by a rider sliding using exercise equipment making at least one left and right turn;
A processor that calculates an evaluation value indicating the skill of the rider's turn using the first acceleration data;
An information processing apparatus comprising:

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