JP2009279126A - Swing evaluating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a swing evaluating device which can evaluate a swing by accurately analyzing the swing to improve the swinging technique. <P>SOLUTION: The swing evaluating device compares the posture change of the body parts of a learner with a predetermined determining criterion when the leaner practices swinging for hitting a ball using a ball hitting implement. The swing evaluating device includes: an acceleration sensor 10 which detects the posture change of the body parts of the learner; a microphone 11 which detects an impact sound when the ball hitting implement swung by the learner hits a ball; a data memorizing section 33 which memorizes the detected information during a specific time between the time of detecting the impact sound by the microphone 11 and a predetermined time among the detected information detected by the acceleration sensor 10; a memory 23 which sets and memorizes as determining criterion information for comparison for evaluating the swing; and a computation section 35 which evaluates the swing by comparing the detected information memorized in the data memorizing section 33 with the determining criterion information of the memory 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a swing evaluation apparatus that performs an evaluation so that a practitioner learns a correct swing in sports such as golf, tennis, and baseball.

2. Description of the Related Art In recent years, techniques for analyzing swings in various sports, particularly golf swings, have advanced, and various devices have been proposed for a practitioner (golf player) to learn better swings by himself. For example, in Patent Document 1, the movement of the golf player's head (head-up) before and after the impact during the swing is detected, and when the head-up occurs, the player is immediately alerted to the player himself / herself. Discloses a technique for solving a head-up that is difficult to recognize and acquiring a correct swing.
JP-A-6-15021

  However, the apparatus as described above only determines whether or not there has been a head-up by paying attention to the movement of the head of the golf player until the impact is detected. There is a problem that the quality cannot be judged. In order to improve golf, it is also necessary to practice the practice of wearing a similar swing, taking the swing of a professional golf player as an example, but first, individuals such as body type, age, sex, etc. for each golf player Taking into account the differences, it is important to learn the appropriate swing that best suits each golf player by improving the wrinkles in the swing for each player and the variation of the form for each swing. There is a demand for a technique that can perform swing evaluation in consideration of individual differences among players.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a swing evaluation apparatus that can accurately analyze a swing and perform an evaluation for improving the swing technique.

  In order to solve the above problems, the swing evaluation device according to the present invention compares the posture change of the body part of the practitioner with a predetermined criterion when performing a swing practice of hitting a ball using a hitting tool. A swing evaluation device (for example, the golf swing evaluation device 1 in the embodiment) that performs evaluation, and a detection unit (for example, the acceleration sensor 10 in the embodiment) that detects a change in posture of the body part of the practitioner; Of the detection information detected by the sound collection unit (for example, the microphone 11 in the embodiment) that detects the impact sound that the practitioner's swinging ball hits the ball and the detection unit detects the impact sound. A first storage unit (for example, the data storage unit 33 in the embodiment) that stores detection information for a predetermined time that goes back to a preset time from the time The detection information stored in the first storage unit is newly detected by the detection unit and the second storage unit (for example, the memory 23 in the embodiment) that sets and stores the determination information as the comparison target of the swing evaluation. The detection information stored in the first storage unit is configured to include a calculation processing unit that compares the determination information stored in advance in the second storage unit and performs swing evaluation.

  In the swing evaluation device, the first storage unit stores the latest detection information for a predetermined time set in advance among the detection information continuously detected by the detection unit, and the detection information before the predetermined time. Detection at least from the time when the impact sound is detected to a predetermined time, by updating the latest detection information while erasing as needed, and stopping the update recording when the sound collection unit detects the impact sound. It is preferably configured to leave a storage of information.

  Here, it is preferable that the predetermined time is a time corresponding to at least a time from when the practitioner starts swinging the hitting tool to when an impact sound is detected when the hitting tool collides with the ball.

  Moreover, it is preferable that a detection part detects the attitude | position change of the practitioner's head based on the swing of practice object.

  Furthermore, it is preferable that the posture change detected by the detection unit is an acceleration of a part of the practitioner's body that changes based on the swing to be practiced.

  Moreover, it is preferable that a detection part detects the attitude | position change of the body part of the practitioner at least of the 1st direction and the 2nd direction.

  Further, in the posture change, the first direction is preferably a horizontal direction with respect to the ground, and the second direction is preferably a direction perpendicular to the ground.

  Moreover, it is preferable that the display unit (for example, the determination display unit 50 in the embodiment) that displays the result of the swing evaluation by the arithmetic processing unit is provided.

  According to the swing evaluation device of the present invention, a swing is determined by comparing and evaluating with a swing of a criterion (such as a self swing or a senior swing) based on a process of the entire swing based on a change in posture of the body part of the trainee. The practitioner can easily know the shortcomings (such as swing habit and swing form variation), and can improve the practice effect compared to conventional devices.

  In addition, the first storage unit updates the latest detection information for a predetermined time while deleting the detection information before the predetermined time among the detection information continuously detected from the detection unit, and detects the impact sound. If the update recording is stopped and the detection information from the time when the impact sound is detected until a predetermined time is stored, the data amount to be stored can be set to the minimum required amount in the swing evaluation. The first storage unit (recording medium) may have a small memory capacity, and as a result, the entire apparatus can be reduced in size and size.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a golf swing evaluation device according to an embodiment of the present invention, FIG. 2 is a block diagram of the golf swing evaluation device, and FIG. 3 shows a state in which the golf swing evaluation device is attached to a golf cap. FIG.

  The golf swing evaluation device 1 includes a case main body 2 formed in a substantially rectangular box shape, a mounting clip 3 provided on the back surface of the case main body 2, and a golf player during a swing (hereinafter referred to as “player”). , An acceleration sensor 10 for detecting the acceleration of the head, a microphone 11 for collecting impact sound when the club head collides with the ball, an analysis unit 20 including a micro CPU, a determination level setting switch 40 and measurement It is mainly composed of switches of the start switch 41 and a determination display unit 50 that displays the determination result by LED.

  As shown in FIG. 1, the case main body 2 is formed from a synthetic resin material in a horizontally long substantially rectangular box shape. As shown in FIG. 3, the case main body 2 is configured to be detachably attached to a flange portion 6 of a golf cap (cap) 5 by a mounting clip 3. At this time, the heel part 6 of the golf cap 5 is generally formed with an inclination of a predetermined angle (for example, an inclination of 30 ° with respect to the horizontal direction). Therefore, the case body 2 is adapted to the inclination of the heel part 6. And attached to the heel part 6 in a state inclined by a predetermined angle.

  The acceleration sensor 10 is a sensor that detects the acceleration of a movable body in a predetermined biaxial direction (in this embodiment, the player's head). The acceleration generated on the player's head is an electrical analog signal (voltage). Signal). The acceleration sensor 10 is fitted to the case body 1 in accordance with the inclination of the heel part 6 so as to detect two-axis acceleration in the horizontal direction and the vertical direction with respect to the ground in a state where the acceleration sensor 10 is attached to the heel part 6 of the golf cap 5. It is attached at an angle with respect to the internal substrate (so as to be horizontal to the ground). For this reason, the acceleration sensor 10 can detect two accelerations, acceleration in the horizontal direction relative to the ground and acceleration in the vertical direction relative to the ground, as acceleration generated in the player's head. Then, the acceleration sensor 10 outputs an analog signal corresponding to the acceleration generated in the player's head to the analysis unit 20 that is electrically connected.

  The microphone 11 collects an impact sound when the club head collides with the ball, and outputs the sound signal to the analysis unit 20 that is electrically connected. The microphone 11 is built in the case main body 2 so as to capture an impact sound through a sound collecting hole 4 (see FIG. 1) formed in the case main body 2. At this time, since a distance as high as the human height is separated between the vicinity of a tee (not shown) where the impact sound is generated and the sound collection unit (microphone 11), the generation of the impact sound is caused by the propagation speed of the sound wave. A delay occurs until the sound wave emitted from the source reaches the microphone 11, and this delay is corrected in a timely manner in the analysis unit 20 described later.

  As shown in FIG. 2, the analysis unit 20 includes a sensor amplifier 21, a microphone amplifier 22, a memory 23, and a central processing unit 30. The sensor amplifier 21 amplifies the electrical signal output from the acceleration sensor 10. Here, the acceleration sensor 10 outputs an electric signal including the movement of the player's head and the gravitational acceleration. However, since the gravitational acceleration is output as a constant voltage, that is, a direct current with respect to time, the sensor amplifier 21. By connecting a coupling capacitor (not shown) to this input stage and cutting this direct current component, it is possible to obtain an electric signal corresponding only to the movement of the player's head excluding gravitational acceleration.

  The microphone amplifier 22 amplifies the audio signal output from the microphone 11. Further, the microphone amplifier 22 has a filter function for cutting frequency components other than the impact sound. Furthermore, in order to respond only to sounds that are significantly louder than ambient sounds, such as impact sounds, a pulse signal is output to the central processing unit 30 only when the amplified audio signal exceeds a predetermined voltage value set in advance. The microphone amplifier 22 is adjusted so that the impact timing is detected.

  The central processing unit (micro CPU) 30 includes a control unit 31, an analog / digital conversion unit (A / D conversion unit) 32, a data storage unit 33, a microphone input unit 34, an arithmetic processing unit 35, and an output unit 36. Is done.

  The control unit 31 controls the operation so that the measurement of the acceleration is started when the measurement start switch 41 is pressed for a predetermined time set in advance. Here, the reason why the measurement is not immediately started when the measurement start switch 41 is pressed is to prevent erroneous operation of the measurement start switch 41.

  The A / D converter 32 converts the analog voltage signal output from the acceleration sensor 10 and amplified by the sensor amplifier 21 when measurement is started into a digital signal. The voltage signal converted into the digital value is stored in the data storage unit 33.

  The data storage unit 33 stores a voltage signal converted into a digital value by the A / D conversion unit 32 (swing data as time-series acceleration fluctuations, which will be referred to as “acceleration data” in the following description). By the way, the time required from the start of the downswing to the moment of impact is generally about 0.3 seconds. Therefore, the amount of data for storing the acceleration data in the data storage unit 33 is data from when the impact sound is detected by the microphone 11 until about 0.3 seconds (corresponding to when the downswing starts). As described above, the data storage unit 33 stores the latest information corresponding to a preset amount of data (in the present embodiment, about 0.3 seconds) of the detection information continuously output from the acceleration sensor 10. The amount of data to be stored can be minimized by continuously updating the previous information while erasing the previous information, and finally storing the detection information for about 0.3 seconds after the impact detection. Thus, the entire apparatus can be reduced in size and size. Therefore, as described above, a convenient device that can be attached to the flange portion 6 of the golf cap 5 can be provided.

  The microphone input unit 34 receives an audio signal (impact timing signal) detected by the microphone 11. When the microphone input unit 34 receives the timing signal, the data storage unit 33 stops recording acceleration data immediately thereafter or after a lapse of a minute time. As a result, the acceleration data from the start of the downswing until the moment of impact or after a lapse of a minute time is stored in the data storage unit 33. On the other hand, in the measured swing, acceleration data such as the best swing can be stored in the memory 23 and set as a reference (evaluation standard) in the swing evaluation. For the reference setting, the reference data (acceleration data during the best swing) can be easily stored in the memory 23 by long-pressing the measurement start switch 41 (for example, for 3 seconds) after the completion of the swing. The memory 23 preferably has a function that can be backed up using a non-volatile memory or a battery so that the reference data can be retained even after the power is turned off.

  The arithmetic processing unit 35 reads the acceleration data to be evaluated stored in the data storage unit 33 after the swing measurement, compares the acceleration data with the reference data stored in the memory 23, and moves the player's head. Is analyzed. At this time, the evaluation of the swing is performed based on a determination level preset by the determination level setting switch 40. There are various analysis methods, such as a method of calculating the displacement of the position by double integration of acceleration data and a method of discriminating based on the amount of acceleration itself, but the most suitable method is adopted depending on the purpose to be judged. It is preferable to do. In this embodiment, the analysis algorithm is programmed by paying attention to the magnitude of the acceleration itself applied to the player's head during the swing. Moreover, since the acceleration sensor 10 employs a biaxial sensor as described above, the arithmetic processing unit 35 can decompose and analyze the acceleration in the horizontal direction and the vertical direction with respect to the ground. It should be noted that by adjusting the determination level setting switch 40, the reference of the above-described determination level is variable, and can be applied to players of all proficiency levels.

  The output unit 36 outputs a signal to the electrically connected determination display unit 50 based on the analysis result (swing evaluation). The determination display unit 50 is configured as a display unit including, for example, an LED (light emitting diode), and displays the analysis result based on a signal from the output unit 36. Although the determination display unit 50 can be configured by other display devices or the like, in the present embodiment, a simple display using LEDs is used for the sake of simplicity and cost reduction.

  Next, operation | movement of the golf swing evaluation apparatus 1 which concerns on this embodiment is demonstrated with reference to FIGS. For example, in a golf driving range, a player first wears the golf cap 5 and attaches the golf swing evaluation device 1 to the buttocks 6 of the golf cap 5. Then, after pressing the measurement start switch 41 for a predetermined time, the golf club is gripped to perform a swing and hit the ball. As a result, a voltage signal (acceleration signal) corresponding to the movement of the player's head is output from the acceleration sensor 10 to the analysis unit 20, and the microphone 11 captures an impact sound and outputs an audio signal to the analysis unit 20. Based on these output signals, the analysis unit 20 stores acceleration data for about 0.3 seconds from the moment of impact.

  Here, as an example of the acceleration data stored in the analysis unit 20 in this manner, graphs of acceleration data waveforms based on the movements of the heads of different subjects A and B are shown in FIGS. 4 and 5, respectively. . FIG. 4 is a graph showing a waveform of acceleration data (horizontal component) of the measurement subject A who is an intermediate golfer, and FIG. 5 is an acceleration data (horizontal component) of the measurement subject B who is an advanced golfer. It is a graph which shows the waveform. 4 and 5, the vertical axis indicates acceleration (A / D conversion value), the horizontal axis is the time axis, and goes back 0.30 sec (10 msec × 30 data) from the moment of impact on the scale in 10 msec increments. A time of 0.32 sec, which is a sum of the time and 0.02 sec (10 msec × 2 data) after impact, is shown. 4 and 5 show only acceleration data in the horizontal direction, and illustration and description of the vertical direction are omitted.

  Comparing the acceleration data of FIG. 4 and FIG. 5, it can be seen that the tendency of the acceleration (waveform) measured by the person to be measured is different. This occurs because each player's swing form is different. If only the magnitude of the acceleration (A / D conversion value) is absolutely evaluated, the swing form differs. This indicates that it is difficult to perform an appropriate swing evaluation for each player. Therefore, the golf swing evaluation apparatus 1 does not perform absolute evaluation only based on the magnitude of acceleration in the swing, but relatively evaluates the measured swing by comparing it with the player's own best swing or the like. According to this, the acceleration data at the time of the best swing of the player is stored in the memory 23 of the analysis unit 20 and set as a reference (determination criterion) in the swing evaluation, so that each swing measured thereafter is It is comparatively evaluated and the correct swing suitable for each player can be acquired.

  This evaluation method will be specifically described with reference to FIGS. 6 and 7 based on the acceleration data of the persons A and B to be measured. Here, it is assumed that the above-described acceleration data of FIGS. 4 and 5 are used as reference data of the persons A and B to be measured (for example, acceleration data at the time of the best swing of the persons A and B) and the swing evaluation is performed. .

  In FIG. 6, the square mark indicates acceleration data at the time of the best swing of the person A to be measured, the triangle mark indicates the acceleration data of the evaluation object swing of the person A to be measured, and the circle mark indicates the evaluation object. The difference value between the acceleration data of the swing and the acceleration data at the time of the best swing is shown. Similarly, in FIG. 7, the square mark indicates acceleration data (reference data) at the time of the best swing of the person to be measured B, the triangle mark indicates the acceleration data of the symmetric swing of the person to be measured B, and the circle mark Shows the difference value between the acceleration data of the evaluation target swing and the acceleration data at the time of the best swing. In FIGS. 6 and 7, the vertical axis and the horizontal axis indicate acceleration (A / D conversion value) and time as in FIG.

  As shown in FIG. 6 and FIG. 7, it can be seen that even if a similar swing is performed, there is a difference in the movement of each player's head that occurs with each swing. First, the difference value (circle) of the swing of the person A to be measured shown in FIG. 6 is considered to be the amount of blurring of the foam with respect to the best swing in the swing of the person A to be measured. The swing evaluation of the measurer A is performed. The smaller the difference value (blur amount), the closer the swing is to the target of the best swing form, and the larger the difference value (blur amount), the more deviated the swing from the best swing form. It is based on being. In this evaluation, in order to absorb the measurement error on the time axis, the difference value is calculated from the measurement data of the time before and after the arbitrary time of the reference data, and the minimum value of these data is calculated. By using difference value data, measurement errors on the time axis are reduced.

  Similarly, the difference value (circle) of the swing of the person to be measured B shown in FIG. 7 is considered as the amount of shake of the form with respect to the best swing in the swing of the person to be measured B, and the amount of shake is analyzed. Thus, the swing evaluation of the person to be measured B is performed.

  As shown in FIG. 6 and FIG. 7, the amount of blur of the subject A who is an intermediate person is relatively large, so that the blur is large compared to the form at the time of the best swing and the variation for each swing is large and unstable. It is evaluated that it is a swing. On the other hand, since the amount of blur of the measurement subject B who is an advanced person is relatively small, a good swing close to the form at the time of the best swing is performed and it can be evaluated that the swing is stable (more It can be predicted that the ball will surely fly). Such swing evaluation is performed in the analysis unit 20 (central processing unit 30) according to a predetermined determination level, and the evaluation result is displayed on the determination display unit 50. Then, the player can self-diagnose the golf progress by looking at the display result, and can learn the correct golf swing suitable for him.

  Further, in this apparatus, not only the best swing of the player itself is used as reference data, but also various examples of use are conceivable, such as storing the swing of a golf expert rather than the player as reference data and using it as a reference for the swing, It can be used more flexibly.

  Although the preferred embodiments of the present invention have been described so far, the scope of the present invention is not limited to those shown in the above-described embodiments. For example, in the above-described embodiment, the example in which the golf swing evaluation device 1 is attached to the head of the player (the hip portion 6 of the golf cap 5) has been described. However, the scope of the present invention is not limited to this. Any part of the player's body (for example, an arm, a shoulder, etc.) can be applied, and a swing evaluation based on the movement of each part of the body can be performed.

  Moreover, in the above-mentioned embodiment, although the example which performed the swing evaluation based on the acceleration data output using the acceleration sensor 10 is shown, the scope of the present invention is not limited to this, and is predetermined. You may comprise using the angular velocity sensor etc. which can detect the angular velocity around this axis | shaft. According to this, it is possible to perform the swing evaluation by grasping the movement (rotational motion) of the arm or the waist in the swing as the angular velocity.

  Furthermore, in the above-mentioned embodiment, although the example which applied the swing evaluation apparatus to golf swing evaluation (golf swing evaluation apparatus) is shown, the scope of the present invention is not limited to this. It can be applied to the swing evaluation of any sport such as baseball.

  Moreover, in the above-mentioned embodiment, the determination display part 50 was comprised from the indicator using LED (light emitting diode), However, The range of this invention is not limited to this, A liquid crystal display You may comprise by a device (LCD) etc. According to this, since the waveform of acceleration data can be displayed on the liquid crystal display together with the result of the determination of the quality of the swing, the apparatus can be more convenient for the user (player).

  Further, the apparatus may be provided with a USB interface, a USB terminal, etc. so that data can be transmitted / received to / from a personal computer or the like. Further, by providing a wireless LAN interface or the like, data may be received by a display or a personal computer connected to a wireless receiver. According to this, users can easily manage these data by outputting judgment results to a personal computer, etc., collecting and analyzing data, and rewriting judgment criteria. Further, it becomes possible to make the apparatus more convenient.

It is a perspective view showing a golf swing evaluation device concerning one embodiment of the present invention. It is a block diagram which shows the structure of the said evaluation apparatus. The said evaluation apparatus shows the state attached to the golf cap, (A) is a front view, (B) is a side view. It is a graph which shows the acceleration data of the to-be-measured person A measured using the said evaluation apparatus. It is a graph which shows the acceleration data of the to-be-measured person B measured using the said evaluation apparatus. It is a graph for demonstrating swing evaluation of the to-be-measured person A in the said evaluation apparatus. It is a graph for demonstrating swing evaluation of the to-be-measured person B in the said evaluation apparatus.

Explanation of symbols

1 Golf swing evaluation device (swing evaluation device)
2 Case body 3 Attached clip 5 Golf cap 6 heel part 10 Acceleration sensor (detection part)
11 Microphone (sound collector)
20 Analysis unit 23 Memory (second storage unit)
30 Central processing unit 33 Data storage unit (first storage unit)
35 arithmetic processing unit 40 judgment level setting switch 41 measurement start switch 50 judgment display unit (display unit)

Claims (8)

A swing evaluation device for performing an evaluation by comparing a posture change of a body part of a practitioner with a predetermined criterion when performing a swing practice of hitting a ball using a hitting tool,
A detection unit that detects a change in posture of the body part of the practitioner;
A sound collection unit that detects an impact sound that the practitioner's swinging ball hits the ball;
Of the detection information detected by the detection unit, a first storage unit that stores detection information for a predetermined time that goes back to a preset time from when the sound collection unit detects an impact sound;
A second storage unit that sets and stores the detection information stored in the first storage unit as determination criterion information to be compared for swing evaluation;
A calculation processing unit for performing swing evaluation by comparing detection information newly detected by the detection unit and stored in the first storage unit with determination criterion information stored in advance in the second storage unit; A swing evaluation device characterized by comprising.   The first storage unit stores the latest detection information for the predetermined time set in advance among the detection information continuously detected by the detection unit, and erases the detection information before the predetermined time as needed. However, by updating to the latest detection information and stopping the update recording when the sound collection unit detects an impact sound, at least detection from the time when the impact sound is detected to a time that is a predetermined time later The swing evaluation apparatus according to claim 1, wherein the apparatus is configured to leave a memory of information.   3. The predetermined time is a time corresponding to at least a time from when the practitioner starts swinging the hitting tool to when an impact sound in which the hitting tool collides with the ball is detected. The swing evaluation apparatus described.   The swing evaluation apparatus according to claim 1, wherein the detection unit detects a change in posture of the head of the practitioner based on a swing to be practiced.   The swing evaluation apparatus according to any one of claims 1 to 4, wherein the posture change detected by the detection unit is an acceleration of a body part of a practitioner that changes based on a swing to be practiced.   The swing evaluation apparatus according to claim 1, wherein the detection unit detects a change in posture of the part in at least a first direction and a second direction.   The swing evaluation apparatus according to claim 6, wherein the first direction is a horizontal direction with respect to the ground, and the second direction is a vertical direction with respect to the ground.   The swing evaluation apparatus according to claim 1, further comprising a display unit that displays a result of the swing evaluation by the arithmetic processing unit.

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