JP2019208690A - Evaluation method and evaluation system - Google Patents

Abstract

To appropriately evaluate a user's motion.SOLUTION: An evaluation system 1 according to the present invention for evaluating a first motion that a user performs includes: a first acquisition unit 10 for acquiring a first evaluation result in which at least one of joint torque for each joint of the user, joint power for each joint, and a magnitude of the contribution to the first motion for each joint in the first motion that the user performs is evaluated; and a second acquisition unit 20 for acquiring a second evaluation result in which a motor function of body parts including each joint of the user is evaluated in a second motion different from the first motion that the user performs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an evaluation method and an evaluation system.

  Conventionally, in a golf lesson, the movement of a golfer during a golf swing is measured using a measuring device such as a motion sensor or a camera, and based on information obtained from the measurement, the movement of the golfer's body is visible from the outside. It was common for instructors to instruct golfers.

  In Patent Document 1, a sensor attached to a predetermined part of the golfer's body detects a movement of the predetermined part when the golfer performs a predetermined action different from the golf swing, and based on the detection result, the body of the golfer A technique for evaluating the state (such as joint flexibility) is disclosed.

JP 2012-139480 A

  A golf swing is generally a physical exercise using the entire golfer's body, which proceeds continuously in the order of address, backswing, top, downswing, impact, and finish. Therefore, it is important not only to evaluate the state of the golfer's body, but also to evaluate how the golfer's body is used when performing a golf swing, and to provide guidance according to these evaluation results. It is. However, as in the technique disclosed in Patent Document 1, there is a problem that it is not possible to appropriately evaluate a golfer's movement only by evaluating the state of the body.

  The objective of this invention made | formed in view of the above problems is providing the evaluation method and evaluation system which can evaluate appropriately the operation | movement which a user performs.

An evaluation method according to an aspect of the present invention is an evaluation method for evaluating a first motion performed by a user, and includes a joint torque for each joint of the user in the first motion performed by the user, A first obtaining step of obtaining a first evaluation result obtained by evaluating at least one of joint power and a magnitude of contribution to the first motion for each joint; and the first performed by the user. A second acquisition step of acquiring a second evaluation result obtained by evaluating a motor function of a body part including each joint of the user by a second operation different from the operation.
By having the said structure, the operation | movement which a user performs can be evaluated appropriately.

In the evaluation method according to the present invention, the contribution to the first action for each joint is the contribution for each joint to the moving speed of the exercise tool used in the first action and the kinetic energy of the exercise tool. Preferably, at least one of the contributions for each joint.
By having the said structure, the evaluation result of the contribution for every joint with respect to the moving speed of the exercise tool by a 1st operation | movement, and a kinetic energy is acquirable.

In the evaluation method according to the present invention, it is preferable that the first operation is a golf swing.
By having the said structure, a golf swing can be evaluated appropriately.

In the evaluation method according to the present invention, the movement speed of the exercise tool is preferably the head speed of the golf club, and the kinetic energy of the exercise tool is preferably the kinetic energy of the head of the golf club.
By having the said structure, the evaluation result of the contribution for every joint with respect to the head speed of a golf club by a golf swing and the kinetic energy of a head is acquirable.

In the evaluation method according to the present invention, it is preferable that the motor function is at least one of flexibility of the body part and a movable range of the body part.
With the above configuration, the first operation can be analyzed in more detail and appropriately evaluated.

In the evaluation method according to the present invention, it is preferable that the second operation includes a plurality of operations, and each of the plurality of operations is an operation related to one or a plurality of joints of the user.
By having the said structure, a motor function can be evaluated about each joint of a user.

The evaluation method according to the present invention preferably further includes a presentation step of presenting lesson contents to the user according to the first evaluation result and the second evaluation result.
By having the above configuration, it is possible to present appropriate lesson content to the user.

In the evaluation method according to the present invention, at least one of the user's action associated with the first action, the user's thought accompanying the first action, and a result of the first action is evaluated. It is preferable to further include a third acquisition step of acquiring the third evaluation result.
By having the above configuration, the first operation can be more appropriately evaluated.

The evaluation method according to the present invention preferably further includes a presentation step of presenting lesson content for the user according to the first evaluation result, the second evaluation result, and the third evaluation result.
By having the above configuration, it is possible to present appropriate lesson content to the user.

An evaluation system according to an aspect of the present invention is an evaluation system that evaluates a first action performed by a user, and a joint torque for each joint of the user in the first action performed by the user, for each joint. A first obtaining unit that obtains a first evaluation result that evaluates at least one of the joint power and the magnitude of contribution to the first motion for each joint; and the first performed by the user A second acquisition unit configured to acquire a second evaluation result obtained by evaluating a motor function of a body part including each joint of the user by a second operation different from the above operation.
By having the said structure, the operation | movement which a user performs can be evaluated appropriately.

  ADVANTAGE OF THE INVENTION According to this invention, the evaluation method and evaluation system which can evaluate a user's operation | movement appropriately can be provided.

It is a figure which shows the structural example of the evaluation system which concerns on one Embodiment of this invention. It is a figure which shows the structural example of the 1st acquisition part shown in FIG. It is a figure which shows the other structural example of the 1st acquisition part shown in FIG. It is a figure which shows the example of attachment of the marker to a golfer in case the position coordinate data acquisition part shown to FIG. 2A is a motion capture. It is a figure which shows the example of attachment of the marker to a club in case the position coordinate data acquisition part shown to FIG. 2A is a motion capture. It is a figure which shows an example of the joint torque which the 1st calculation part shown to FIG. 2A calculates. It is a figure which shows the example of a display of the contribution for every joint with respect to the head speed of a club in each time during a swing which the 2nd calculation part shown to FIG. 2A calculates. It is a figure which shows the example of a display of the cumulative value of the kinetic energy of the club head resulting from each joint of a golfer, and the ratio for every joint of the cumulative value which the 2nd calculation part shown to FIG. 2A calculates. It is a figure which shows the example of a display of the joint torque for every joint calculated about the some swing by the 1st calculation part shown to FIG. 2A. It is a figure for demonstrating the coherence which the 1st calculation part shown to FIG. 2A calculates. It is a figure which shows the example of a display of the coherence of the joint torque for every joint calculated about the some swing by the 1st calculation part shown to FIG. 2A. It is a figure which shows the example of a display of the contribution for every joint with respect to the head speed of a club calculated about the some swing by the 2nd calculation part shown to FIG. 2A. It is a figure which shows the example of a display of the cumulative value of the kinetic energy of the club head resulting from each joint calculated by the 2nd calculation part shown to FIG. 2A, and the ratio for every joint of the cumulative value. is there.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In each figure, the same code | symbol has shown the same or equivalent component.

  FIG. 1 is a diagram illustrating a configuration example of an evaluation system 1 according to an embodiment of the present invention. The evaluation system 1 according to the present embodiment evaluates an operation (first operation) performed by the user, and presents lesson contents for the user according to the evaluation result. In the following description, it is assumed that the user is a golfer, and the golfer's golf swing is evaluated and lesson contents are presented.

  The evaluation system 1 illustrated in FIG. 1 includes a first acquisition unit 10, a second acquisition unit 20, a third acquisition unit 30, and a presentation unit 40.

  The first acquisition unit 10 includes at least one of the joint torque for each joint of the user, the joint power for each joint, and the magnitude of contribution to the first motion for each joint in the first motion performed by the user. An evaluation result (first evaluation result) obtained by evaluating one is acquired. In the present embodiment, the contribution to the first motion for each joint is the contribution of each joint to the moving speed of the exercise tool used in the first motion and the contribution of each joint to the kinetic energy of the exercise tool. At least one. The exercise equipment is, for example, a golf club (hereinafter sometimes referred to as “club”). That is, the first operation is a golf swing. When the first operation is a golf swing, the moving speed of the exercise tool is the head speed of the golf club. The kinetic energy of the exercise tool is the kinetic energy of the golf club head. The exercise equipment may be a tennis racket, for example. That is, the first action may be a tennis swing. Hereinafter, the first operation will be described using an example of a golf club. The first acquisition unit 10 includes a golfer performing a golf swing such as a joint torque for each joint of the user, a joint power for each joint, and a magnitude of contribution to the golf swing for each joint. Obtain evaluation results of how to use the body. Here, the details of the first acquisition unit 10 will be described later. As the magnitude of the contribution to the golf swing for each joint, for example, the contribution for each joint to the club head speed and the kinetic energy of the club head. Assess at least one of the joint-by-joint contributions to.

  Hereinafter, acquisition of the first evaluation result by the first acquisition unit 10 will be described in detail.

  FIG. 2A is a diagram illustrating a configuration example of the first acquisition unit 10.

  The first acquisition unit 10 illustrated in FIG. 2A includes a position coordinate data acquisition unit 11, a ground reaction force data acquisition unit 12, a first calculation unit 13, and a second calculation unit 14.

  The position coordinate data acquisition unit 11 acquires the position coordinate data of the predetermined part of the golfer's body and the position coordinate data of the predetermined part of the club during the swing of the club by the golfer, and outputs them to the first calculation unit 13. As the position coordinate data acquisition unit 11, for example, a motion capture, an inertial sensor, or the like can be used.

  When motion capture is used as the position coordinate data acquisition unit 11, for example, as shown in FIG. 3A, a marker is attached to a predetermined part of the golfer's body. In FIG. 3A, the example which attached the markers M01-M34 to 34 places of the body is shown. Further, as shown in FIG. 3B, a marker is attached to a predetermined part of the club. FIG. 3B shows an example in which markers M35 to M38 are attached to four locations of the club. The marker M35 is attached to the grip end of the club. The marker M36 is attached to the hand of the club shaft. The marker M37 is attached to the tip of the club shaft. The marker M38 is attached to the shaft at right angles to the face surface of the head.

  A golfer's swing is photographed with a plurality of (for example, 10 or more) motion capture cameras from the surroundings at a predetermined sampling rate (for example, 100 Hz or more) with the markers attached to the golfer and the club. The position coordinate data acquisition unit 11 specifies the position coordinates of each marker from the captured image of each motion capture camera, so that the position coordinate data of the predetermined part of the golfer's body and the position coordinate data of the predetermined part of the club during the swing To get.

  When an inertial sensor is used as the position coordinate data acquisition unit 11, the inertial sensor is attached to a predetermined part of the golfer's body and a predetermined part of the club. The position coordinate data acquisition unit 11 acquires (estimates) position coordinate data of a predetermined part of the body of the golfer and position coordinates of a predetermined part of the club from the measurement result of each inertial sensor during the swing. When motion capture is used as the position coordinate data acquisition unit 11, a large-scale facility is required to attach a marker to a golfer and a club and take a picture of a swing with a large number of motion capture cameras. In addition, much labor and time are required to acquire data such as wearing a dedicated suit and calibrating the camera. On the other hand, when an inertial sensor is used as the position coordinate data acquisition unit 11, it is only necessary to attach an inertial sensor to the golfer and the club and acquire the position coordinate of the inertial sensor. Therefore, position coordinate data of a predetermined part of the golfer's body and a predetermined part of the club can be acquired with a very simple configuration as compared with the case of using motion capture.

  FIG. 2B is a diagram illustrating another configuration example of the first acquisition unit 10. The position coordinate data acquisition unit 11 shown in FIG. 2A can be replaced with an operation data acquisition unit 15 as shown in FIG. 2B. The position coordinate data acquired by the position coordinate data acquisition unit 11 includes the position coordinates of the markers attached to the golfer's body and a predetermined part of the club, and information on time changes of the position coordinates. Therefore, the existing rigid link model including the position coordinate information prepared in advance and the motion data obtained by the inertial sensor attached to a predetermined part of the golfer and the club as the motion data acquisition unit 15 are combined. Thus, the position coordinate data acquisition unit 11 can be replaced with the operation data acquisition unit 15.

  When an existing rigid link model prepared (created) in advance is used and the motion is captured by an inertial sensor or the like, the orientation of the segment may be acquired instead of the position coordinates. By doing so, as compared with the method of creating the rigid link model from the position coordinates, it is possible to eliminate the deviation of the marker location, the error caused by the camera, and the like. In addition, since large-scale equipment is not required and initial settings such as camera calibration can be simplified, operation data can be acquired regardless of location.

  The rigid link model is a model that represents a human body with a plurality of rigid elements (segments) and joint elements that connect the rigid elements. Coordinate information may be given to each rigid element, or coordinates acquired from a sensor may be input. When a single body model prepared (created) in advance is used, the calculation time can be shortened by simplifying the system. When using multiple prepared body models, select the appropriate body model for the golfer based on attributes such as the height, gender, and weight of the golfer. can do.

  The inertial sensor data is data indicating the movement amount or posture of the inertial sensor attached to a predetermined part of the golfer and the club, and is detected by a triaxial acceleration sensor or a triaxial angular velocity sensor. With these sensors, various data such as position coordinates, speed, and angular speed during a swing motion can be acquired. As shown in FIG. 2A, it is possible to create a rigid link model using position coordinate data and execute the analysis system, but as shown in FIG. 2B, use a rigid link model prepared in advance. Therefore, since the difference in the skill that the instructor attaches the sensor to the body measurement point hardly affects the result without using a large-scale facility, it can be easily used at a store or the like.

  In the human body model, the length, joint position, and initial posture of each part (segment) are determined in advance, and the movement of the whole body can be reproduced in real time by acquiring the moment of posture of each segment with a sensor. it can. In order to acquire the posture, it is only necessary to acquire a relative angle (Euler angle) formed by adjacent segments or a quaternion. From these data, the posture of each segment is calculated in order from the position of the right hip joint (R. hip) in the distal direction of the body, so that the posture of the entire human body model can be obtained, and from time to time the body with the swing is obtained. The displacement of each part can also be estimated. Similarly, for the club, assuming that the position of both hands and the position of the grip portion of the club coincide, the movement of the club is estimated by inputting the posture of the club obtained by the above-described sensor into a model prepared in advance. Is possible.

  It is assumed that the position of the golfer's foot pressure center (COP (Center of pressure) position) is on the line connecting the heel and toes at the time of addressing, or at least one toe is aligned with the fixed point of the force plate. By taking the address in parallel with the flying ball direction and acquiring the data, it is possible to perform spatial synchronization with the ground reaction force data.

  Referring to FIG. 2A again, the ground reaction force data acquisition unit 12 acquires the ground reaction force data of the golfer who is swinging and outputs the ground reaction force data to the first calculation unit 13. For example, a force plate can be used as the ground reaction force data acquisition unit 12. When a force plate is used as the ground reaction force data acquisition unit 12, two force plates are prepared, and the golfer swings with the right foot on one side and the left foot on the other side. Can be acquired. The ground reaction force data acquisition unit 12 acquires, as the ground reaction force data, for example, the force and moment applied to the force plate by a golfer's swing. The ground reaction force data acquisition unit 12 acquires, as the ground reaction force data, for example, a moment (free moment) generated by friction around the vertical axis and the position of the golfer's foot pressure center (COP position).

  The first calculation unit 13 is a position coordinate data of a predetermined part of the golfer's body acquired by the position coordinate data acquisition unit 11 and a position coordinate data of a predetermined part of the club of the golfer, or a golfer acquired by the motion data acquisition unit 15. Based on the motion data of the predetermined part of the body and the motion data of the predetermined part of the club, the ground reaction force data acquired by the ground reaction force data acquisition unit 12, the rigid link model, and the body part inertia coefficient. The joint torque for each joint is calculated and output to the second calculation unit 14. The body part inertia coefficient indicates information on inertia characteristics such as the mass of the body part, the center of mass position, and the moment of inertia. The body part inertia coefficient is obtained in advance by various measurements. Details of the operation of the first calculation unit 13 will be described later.

  The second calculation unit 14 determines the contribution of the joint torque calculated by the first calculation unit 13 for each golfer's joint and the force generated by the golfer's movement during the swing to the club head speed. Calculate for each joint. In golf, increasing the flight distance is one of the important factors, and in order to increase the flight distance, it is important to increase the club head speed. Therefore, it is very useful to analyze how each golfer's joint contributes to the club head speed. Details of the operation of the second calculation unit 14 will be described later. The joint contribution to the club head speed refers to acceleration, kinetic energy, and the like given to the club head by each joint.

  Next, the acquisition method of the 1st evaluation result by the 1st acquisition part 10 is demonstrated.

  In the first evaluation result acquisition method, the position coordinate data acquisition unit 11 acquires position coordinate data of a predetermined part of the golfer's body and position coordinate data of the predetermined part of the club during the swing of the club by the golfer. A data acquisition step, or a motion data acquisition unit 15 for acquiring motion data of a predetermined part of the golfer's body and motion data of a predetermined part of the club during the swing of the club by the golfer, and a ground reaction force A ground reaction force data acquisition step in which the data acquisition unit 12 acquires ground reaction force data of the golfer who is swinging, and a predetermined calculation of the golfer's body acquired by the first calculation unit 13 in the position coordinate data acquisition step. The position coordinate data of the part, the position coordinate data of the predetermined part of the club, and the ground reaction force data acquisition Calculating the joint torque for each golfer's joint based on the ground reaction force data and the rigid link model that represents the human body with a plurality of rigid elements and joint elements connecting the rigid elements. The first calculation step and the second calculation unit 14 contribute to the club head speed by the joint torque for each joint of the golfer calculated by the first calculation step and the force generated by the operation of the golfer during the swing. A second calculating step of calculating for each joint of the golfer. Below, operation | movement of the 1st calculation part 13 and the 2nd calculation part 14 is demonstrated in detail.

  First, the operation of the first calculation unit 13 will be described.

  The 1st calculation part 13 performs roughly kinematics (kinematics) calculation and kinetics (kinetics) calculation. The first calculation unit 13 calculates, for example, the posture / angular velocity / angular acceleration of the segment, the position of the center of gravity / the speed of the center of gravity / the acceleration of the center of gravity as the kinematics calculation. Further, the first calculation unit 13 calculates the joint torque of each joint of the golfer, the moment arm for calculating the equivalent torque (perpendicular connecting the rotation axis and the action line of the force) and the like as the kinetic calculation.

  First, kinematics calculation will be described. The first calculation unit 13 is first required for the inverse dynamics calculation based on the position coordinate data acquired by the position coordinate data acquisition unit 11 or the operation data acquired by the operation data acquisition unit 15 and the existing rigid link model. The marker coordinate position for each calculation and the posture of each segment are calculated. Inverse dynamics calculation is a method for calculating the torque exerted by each joint in order to realize the motion obtained by measurement. Next, the first calculation unit 13 creates a rigid link model based on the calculated marker coordinate position, and calculates the speed / acceleration of each marker. Next, the first calculation unit 13 sets a local coordinate system, and based on the calculated velocity / acceleration of each marker, the posture / angular velocity / of each segment in the rigid link model representing the golfer's body in the local coordinate system. The angular acceleration, the center of gravity position / the center of gravity speed / the center of gravity acceleration are calculated. In addition, the 1st calculation part 13 uses a body part inertia coefficient as needed in each calculation mentioned above.

  Next, kinetic calculation will be described. Based on the ground reaction force data acquired by the ground reaction force data acquisition unit 12 and the angular velocity of each segment calculated by kinematics calculation, the first calculation unit 13 uses the inverse dynamics calculation to calculate the joint of the golfer Each joint torque is calculated. For example, as shown in FIG. 4, the first calculation unit 13 includes a golfer's neck (Neck), right shoulder (R. shoulder), right elbow (R. elbow), right wrist (R. wrist), left shoulder ( L. shoulder, left elbow (L. elbow), left wrist (L. wrist), torso (Torso), right hip joint (R. hip), right knee (R. knee), right ankle (R. ankle), For each of the left hip joint (L. hip), the left knee (L. knee), and the left ankle (L. ankle), joint torques in three axis directions (X axis, Y axis, Z axis) are calculated. The first calculation unit 13 calculates the ground reaction force generated by the golfer's swing based on the ground reaction force data. The first calculation unit 13 calculates a moment arm for calculating the equivalent torque of the calculated torque.

  The first calculation unit 13 outputs the kinematic calculation and the calculation result of the kinetic calculation to the second calculation unit 14.

  Next, the operation of the second calculation unit 14 will be described.

  The second calculation unit 14 solves the following equations (1) to (3).

The second calculation unit 14 calculates C ₁ , C ₂ , and h in the expressions (2) and (3). Since these calculations are well known to those skilled in the art, a detailed description is omitted.

When the mass M _head of the club head is applied to both sides of the equation (5), the following equation (6) is obtained.

  The second calculation unit 14 calculates the contribution of each joint to the club head speed, for example, as shown in FIG. 5, each time during the golfer's swing on the golfer's body displayed as a stick picture. The contribution for each joint can be superimposed and displayed on a display unit (not shown). In FIG. 5, the joint that accelerates the head speed (joint that makes a positive contribution) is marked with a rhombus, and the joint that slows the head speed (joint that makes a negative contribution). Is marked with a circle. In FIG. 5, the magnitude of contribution for each joint is indicated by the size of a mark attached to the joint. As shown in FIG. 5, the contribution of each joint at each time during the swing is displayed superimposed on the golfer's body, thereby making it easy to see how each joint contributes at each stage of the swing. Can grasp.

  Further, the second calculation unit 14 may calculate a contribution ratio for each joint with respect to the contributions of all the joints whose contributions have been calculated. By doing so, the degree of contribution of each joint can be grasped in more detail.

  In addition, the second calculation unit 14 integrates the joint contribution (power acting on the head) to the club head speed from a specific posture (for example, the top posture) during the golfer's swing. The cumulative value of the club head kinetic energy resulting from the joint from a particular posture can be calculated. The cumulative contribution of the joint to the head speed up to each time during the swing indicates the contribution of that joint to the kinetic energy of the club head at each time. The second calculation unit 14 calculates the cumulative contribution described above for each joint. By doing so, it is possible to easily grasp how each joint contributes to the kinetic energy of the club head.

  FIG. 6 is a diagram illustrating a display example of the accumulated value of the kinetic energy of the club head caused by each joint of the golfer by the second calculation unit 14. As shown in FIG. 6, for each joint of the golfer, the second calculation unit 14 calculates a cumulative value of the club head kinetic energy resulting from the golfer's joint up to that time for each time during the swing. And can be displayed on the display unit. The total sum of the kinetic energy of the club head due to each joint at a certain time corresponds to the kinetic energy of the club head at that time.

  Further, the second calculation unit 14 calculates a ratio for each joint of a cumulative value of the club head kinetic energy caused by each joint of the golfer at a specific timing (for example, impact timing) during the swing. May be. In this way, as shown in FIG. 6, the second calculation unit 14 has a ratio for each joint to the total kinetic energy of the club head at a specific timing during swing (impact timing in FIG. 6). Can be displayed on the display unit.

  The second calculation unit 14 compares the contribution of each joint to the club head speed calculated for the first swing with the contribution of each joint to the club head speed calculated for the second swing, and compares The result may be output. That is, the second calculation unit 14 calculates the contribution of each joint to the club head speed for each of the plurality of swings, compares the contribution of each joint to the club head speed calculated for each swing, and compares the comparison results. It may be output. By doing so, it is possible to extract a difference in contribution for each joint between swings and specify a factor that causes a difference in head speed.

  For example, the second calculation unit 14 calculates the contribution of each joint to the club head speed for each of two swings (first swing and second swing) by the same golfer. Then, the second calculation unit 14 calculates a difference between the contribution of each joint to the club head speed calculated for the first swing and the contribution of each joint to the club head speed calculated for the second swing in time series. In comparison, a point with a large difference may be extracted as a factor causing a difference in head speed.

  Further, the second calculation unit 14 calculates the difference between the contribution of each joint to the club head speed calculated for the first swing and the contribution of each joint to the club head speed calculated for the second swing in time series. And an index indicating the progress of the golfer may be calculated. For example, the second calculation unit 14 uses the swing as an index indicating the degree of improvement of the golfer according to the degree of coincidence of the contribution for each joint to the club head speed calculated for each of the first swing and the second swing. An index indicating the degree of stability may be calculated. By doing so, the progress of the golfer can be more effectively evaluated by a more objective index of contribution of each joint to the club head speed calculated biomechanically.

  In addition, the second calculation unit 14 sets the first swing as a swing by a golfer, sets the second swing as a target swing (for example, a swing by an advanced player), and improves the golfer who made the first swing. An index indicating the degree may be calculated. That is, the second calculation unit 14 determines the contribution of each joint to the club head speed calculated for the first swing and the ratio of each joint to the club head speed calculated for the second swing (exemplary swing). An index indicating the progress of the golfer who made the first swing may be calculated by comparing the difference with the contribution in time series. For example, the second calculation unit 14 determines the progress of the golfer who made the first swing according to the degree of coincidence of the contribution for each joint to the club head speed calculated for each of the first swing and the second swing. You may calculate the parameter | index which shows. By doing so, the progress of the golfer can be more effectively evaluated by a more objective index of contribution of each joint to the club head speed calculated biomechanically.

  Further, the second calculation unit 14 compares the contribution of the joint to the club head speed during a specific period (for example, the period from the top to the impact) during the swing between the plurality of swings, and the result of the comparison May be output (may be displayed on the display unit). By doing so, it is possible to compare the contribution of each joint during a specific period during the swing among the plurality of swings.

  Further, kinematics calculation and kinetics calculation for each joint by the first calculation unit 13 and calculation of contribution for each joint to the club head speed by the second calculation unit 14 are performed for a plurality of swings. You may display the calculation result about a swing so that comparison is possible. That is, the first calculation unit 13 performs kinematics calculation and kinetics calculation for each golfer's joint for each of the plurality of swings, and at least one of the calculation results for each golfer's joint calculated for each of the plurality of swings, You may display so that comparison is possible. Moreover, the 1st calculation part 13 may display the joint torque of a golfer calculated about each of several swing so that comparison is possible. Further, the second calculation unit 14 calculates, for each of the plurality of swings, the contribution of the joint torque for each golfer's joint and the force generated by the golfer's movement during the swing to the club head speed for each golfer's joint. The contribution of each golfer's joint calculated for each of the plurality of swings may be displayed in a comparable manner. Moreover, the 1st calculation part 13 may display the kinematics calculation result calculated about each of several swing so that comparison is possible.

  For example, as shown in FIG. 7, the first calculation unit 13 superimposes the joint torque calculated by the first swing and the joint torque calculated by the second swing for each joint and displays them on the display unit. It may be displayed. By doing so, it is possible to easily grasp which joint has a large difference between the first swing and the second swing.

  In addition, the first calculation unit 13 calculates the coherence (correlation value) between the joint torque calculated for the first swing and the joint torque calculated for the second swing for each joint, and displays it on the display unit. May be. For example, the first calculation unit 13 calculates coherence based on the following equation (8).

  The first calculation unit 13 may calculate the coherence between the joint torque calculated for the first swing and the joint torque calculated for the second swing for each joint, and display the coherence on the display unit. FIG. 9 is a diagram illustrating a display example of coherence of the joint torques (TorqueX, TorqueY, TorqueZ,) in the three-axis directions for each joint calculated for each of the first swing and the second swing. In FIG. 9, right hip joint (Rhip), right knee (Rknee), right ankle (Rankle), left hip joint (Lhip), left knee (Lknee), left ankle (Lunkle), trunk (Trunk), right shoulder (Rshoulder) ), Right elbow (Relbow), right wrist (Rwrist), left shoulder (Lshoulder), left elbow (Lelbow), left wrist (Lwrist), the joint torque calculated for the first swing and the second swing Shows the coherence with the joint torque. By doing so, it is possible to easily grasp a joint having a large difference between the first swing and the second swing.

  The second calculation unit 14 may display the contribution of each joint to the club head speed calculated for each of the first swing and the second swing on the display unit in a comparable manner. For example, as shown in FIG. 10, the second calculation unit 14 displays the stick-by-time chronological display of the contribution of each club to the club head speed calculated for each of the first swing and the second swing. It may be superimposed on the golfer's body and displayed on the display unit. As shown in FIG. 10, by displaying side by side the contribution of each joint to the club head speed calculated for the first swing and the second swing, for example, in the first swing, the club is moved from the top position. The first swing and the second swing, in which the contribution from the lower body is large until the swing-down impact is reached, and in the second swing, the club is significantly decelerated by the shoulder joint before the impact. Can be easily grasped.

  The second calculation unit 14 calculates the cumulative kinetic energy of the club head caused by each joint, or the total kinetic energy of the club head, calculated for each of the first swing and the second swing. You may display the ratio of the accumulation value of the kinetic energy for every joint so that comparison is possible. For example, as shown in FIG. 11, the second calculation unit 14 calculates the cumulative value of the club head kinetic energy caused by each joint calculated for the first swing and the calculated joint for each second swing. The cumulative value of the kinetic energy of the club head caused may be displayed side by side on the display unit. Further, as shown in FIG. 11, the second calculation unit 14 kinetic energy of the club head caused by each joint calculated for the first swing at a specific timing (for example, impact timing) during the swing. And the ratio of the cumulative value of the club head kinetic energy resulting from each joint calculated for the second swing may be displayed side by side on the display unit.

  Note that the first swing and the second swing may be swings by the same golfer or may be swings by different golfers. When the first swing and the second swing are by different golfers, for example, the first swing is a swing by a golfer receiving a lesson, and the second swing is a swing by an advanced player (becomes a target) Swing).

  Referring to FIG. 1 again, the first acquisition unit 10 outputs the acquired first evaluation result to the presentation unit 40. That is, the first acquisition unit 10 is calculated by the first calculation unit 13 and is calculated by the joint torque for each joint of the user in the first action (golf swing), or by the second calculation unit 14. The joint power for each joint or the magnitude of the contribution to the first action for each joint is output to the presentation unit 40 as the first evaluation result.

  The second acquisition unit 20 evaluates the motor function of the body part including each joint of the user by a second operation different from the first operation (golf swing in the present embodiment) performed by the user. (Second evaluation result) is acquired. The motor function includes, for example, at least one of the flexibility of the user's body part and the range of motion of the body part.

  The second operation is, for example, an operation for evaluating the flexibility and range of motion of the user's body part, and includes, for example, a plurality of operations. Each operation constituting the second operation is an operation related to one or more joints of the user (an operation for evaluating the motor function of one or more joints). Therefore, the evaluation result of motor function can be acquired for each joint of the user.

  The second operation includes, for example, the following seven operations.

  The first operation is an operation of squatting with both arms holding the bar extended upward. The first operation is an operation related to joints such as the shoulder, hip joint, knee, and ankle.

  The second operation is an operation of straddling a hurdle while holding the bar on the shoulder. The second motion is a motion related to each joint of the leg.

  The third operation is an operation in which the left and right legs are lined up and down on an elongated table, and the step is stepped forward on the table with the bar held up and down on the back side. The third action is an action related to joints such as the shoulder, hip joint, knee, and ankle.

  The fourth operation is to rotate the left and right fists from the top and bottom to the back side. The fourth operation is an operation related to joints such as the neck, chest, and shoulder.

  The fifth operation is an operation in which one leg is raised while the knees are stretched from a state of lying on the back. The fifth operation is an operation related to the hip joint.

  The sixth operation is an operation in which the elbows and knees on the same side are touched and extended from the four-sided state alternately and then returned to the original state. The sixth operation is an operation related to the shoulder, the hip joint, and the like.

  The seventh action is to lie down with the legs open to the shoulder width, place the hand on the shoulder extension line, and extend the elbow. The seventh operation is an operation related to the trunk (torso).

  For example, an instructor evaluates whether the user performs various operations as described above and the user can correctly perform each operation. The second acquisition unit 20 acquires the evaluation result as a second evaluation result. In the present embodiment, the second operation has been described using the example of the seven operations described above, but is not limited thereto. In short, the second operation may be an operation that can evaluate the motor function (for example, flexibility and range of motion) of the body part including each joint of the user.

  The second acquisition unit 20 outputs the acquired second evaluation result to the presentation unit 40.

  The third acquisition unit 30 evaluates at least one of the user action associated with the first action, the user thought associated with the first action, and the result of the first action (the first result) 3 evaluation result) is acquired. The third evaluation result is, for example, the user's motion associated with the golf swing (first motion) on the simulator simulating play on the golf course, the user's thought associated with the golf swing, and the golf swing Obtained by evaluating at least one of the results. When the first action is a golf swing, Table 1 shows an example of evaluation items of the user's action accompanying the golf swing, the user's thought accompanying the golf swing, and the result of the golf swing.

  As shown in the above table, for example, the instructor evaluates the user's actions associated with the golf swing, the user's thoughts associated with the golf swing, and the respective evaluation items as a result of the golf swing. The third acquisition unit 30 acquires the evaluation result as a third evaluation result and outputs it to the presentation unit 40.

  The presentation unit 40 presents lesson contents for the user according to the first evaluation result output from the first acquisition unit 10 and the second evaluation result output from the second acquisition unit 20.

  As described above, the first evaluation result is the contribution of the joint torque for each joint of the user, the joint power for each joint, and the first motion for each joint in the first motion (golf swing) performed by the user. It is an evaluation result of at least one of the sizes. That is, the first evaluation result corresponds to the evaluation result of how to use the user's body in the first action. The second evaluation result is an evaluation result of the motor function of the user's body part by the second action performed by the user. That is, the second evaluation result corresponds to an evaluation result of the state of the user's body part such as the flexibility or the range of motion of the body part including each joint of the user. Thus, by acquiring the evaluation result of how the user's body is used in the first action and the evaluation result of the state of the user's body part, the first action can be appropriately evaluated. Then, by presenting lesson contents according to the evaluation result of the first action and the evaluation result of the second action, more appropriate lesson contents can be presented.

  The presentation unit 40 holds, for example, a table that predefines lesson contents according to the usage of the user's body and the state of the body part of the user in the first operation, and refer to this table. Then, the lesson contents corresponding to the first evaluation result and the second evaluation result are presented.

  The presentation unit 40 outputs the first evaluation result output from the first acquisition unit 10, the second evaluation result output from the second acquisition unit 20, and the third acquisition unit 30. Depending on the third evaluation result, the lesson content for the user may be presented.

  Next, a first operation evaluation method by the evaluation system 1 according to the present embodiment will be described. In the evaluation method according to the present embodiment, the first acquisition unit 10 contributes to the joint motion for each joint of the user, the joint power for each joint, and the first motion for each joint in the first motion performed by the user. A first acquisition step of acquiring a first evaluation result that evaluates at least one of the sizes of the first and second operations by the second acquisition unit 20 different from the first operation performed by the user A second obtaining step of obtaining a second evaluation result obtained by evaluating a motor function of a body part including each joint of the user. Here, the contribution to the first action for each joint is, for example, at least one of the contribution for each joint to the moving speed of the exercise tool used in the first action and the contribution for each joint to the kinetic energy of the exercise tool. It is. The first operation is, for example, a golf swing. The moving speed of the exercise tool is, for example, the head speed of a golf club. The kinetic energy of the exercise tool is the kinetic energy of the golf club head. The contribution to the first motion for each joint is, for example, at least one of the contribution for each joint to the club head speed and the contribution for each joint to the kinetic energy of the club head.

  The motor function is, for example, at least one of flexibility and a movable range of the user's body part. Further, the second operation includes, for example, a plurality of operations. Each of the plurality of movements is movement related to one or more joints of the user.

  The evaluation method according to the present embodiment may further include a presentation step in which the presentation unit 40 presents lesson contents for the user according to the first evaluation result and the second evaluation result.

  In addition, in the evaluation method according to the present embodiment, the third acquisition unit 30 is configured to obtain a result of a user action associated with the first action, a user thought associated with the first action, and a result of the first action. You may further include the 3rd acquisition step which acquires the 3rd evaluation result which evaluated at least 1 of them.

  In addition, the evaluation method according to the present embodiment may further include a presentation step of presenting lesson contents to the user according to the first evaluation result, the second evaluation result, and the third evaluation result.

  Next, an example of presentation of lesson contents by the presentation unit 40 will be described.

  For example, it is assumed that a problem that “the joint power of the hip joint is small” is found from the first evaluation result of the user's golf swing. In this case, when lesson contents are presented only according to the first evaluation result, uniform lesson contents are presented regardless of the state of the user's body part. However, in the present embodiment, the cause of the problem can be analyzed in more detail by acquiring the second evaluation result (the evaluation result of the motor function of the user's body part).

  For example, even if the user has a problem that “the joint power of the hip joint is small”, there are a user who has a problem in the motor function of the shoulder joint and a user who has a problem in the motor function of the hip joint. Even if uniform lesson content is presented to such a user, an effective lesson may not be performed. On the other hand, in this embodiment, lesson content more suitable for each user can be presented by presenting lesson content according to the first evaluation result and the second evaluation result.

  For example, a user with low hip joint power due to the motion function of the shoulder joint does not have enough rotation and torsion of the upper body, so the back swing is performed only with the arm, and as a result, the overswing is suppressed. It can be inferred that the movement of the lower body is suppressed. For such a user, in order to improve the motor function of the shoulder joint, for example, lesson contents that increase the rotation of the thoracic vertebra are presented.

  Also, users with low hip joint power due to the hip function are not sufficient for hip joints and thigh fascia latae muscles, so use the right foot (left foot for left-handed players) during backswing. It can be estimated that the joint power of the hip joint becomes small because the swing cannot be performed and the swing is in a state where the waist is retracted. Such users are presented with lesson contents for enhancing the motor function of a part caused by the movement of the hip joint, such as the thigh fascia latae muscle.

  Moreover, a golf swing can be more appropriately evaluated by acquiring the third evaluation result. For example, it is assumed that, as the third evaluation result for the user having a low joint power of the hip joint due to the above-described motor function of the hip joint, an evaluation that the directionality of the hit ball is bad is obtained. In this case, in addition to the cause of the bad orientation of the address, it can be inferred that there is a cause of the center of gravity movement, the shaft blurring, etc. during the swing due to the fact that the right foot cannot be stepped on during the backswing. . Also from this estimation result, it can be estimated that there is a problem with the motor function of the hip joint, and the lesson content suitable for the user can be presented more accurately.

  As described above, the evaluation method according to the present embodiment is based on the magnitude of the contribution to the joint torque for each joint of the user, the joint power for each joint, and the first action for each joint in the first motion performed by the user. The first acquisition step for acquiring the first evaluation result for evaluating at least one and the second operation different from the first operation performed by the user, the motor function of the body part including each joint of the user is obtained. A second acquisition step of acquiring the evaluated second evaluation result.

  In addition, the evaluation device according to the present embodiment includes at least one of the magnitude of contribution to the joint motion for each joint of the user, joint power for each joint, and the first motion for each joint in the first motion performed by the user. The first acquisition unit 10 that acquires the first evaluation result that evaluates one, and the second operation different from the first operation performed by the user, the motor function of the body part including each joint of the user A second acquisition unit 20 that acquires the evaluated second evaluation result.

  Evaluation result of how to use the body such as the joint torque of the user, joint power and the magnitude of contribution to the first action for each joint in the first action, and the body part as the motor function of the body part including each joint of the user By acquiring the evaluation result of the state, it is possible to appropriately evaluate the operation performed by the user based on the evaluation result.

  The evaluation method and the evaluation system according to the present invention are not limited to the specific configuration shown in the above-described embodiment, and various modifications and changes can be made without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Evaluation system 10 1st acquisition part 11 Position coordinate data acquisition part 12 Ground reaction force data acquisition part 13 1st calculation part 14 2nd calculation part 15 Motion data acquisition part 20 2nd acquisition part 30 3rd acquisition Part 40 presentation part

Claims (10)

An evaluation method for evaluating a first action performed by a user,
At least one of joint torque for each joint of the user, joint power for each joint, and magnitude of contribution to the first motion for each joint in the first motion performed by the user was evaluated. A first acquisition step of acquiring a first evaluation result;
A second acquisition step of acquiring a second evaluation result by evaluating a motor function of a body part including each joint of the user by a second operation different from the first operation performed by the user; and The evaluation method characterized by including. The evaluation method according to claim 1,
The contribution to the first action for each joint is at least one of the contribution for each joint to the moving speed of the exercise tool used in the first action and the contribution for each joint to the kinetic energy of the exercise tool. Evaluation method. The evaluation method according to claim 2,
The evaluation method, wherein the first operation is a golf swing. The evaluation method according to claim 3,
The moving speed of the sports equipment is the head speed of the golf club,
The kinetic energy of the exercise equipment is an evaluation method, which is kinetic energy of a golf club head. In the evaluation method as described in any one of Claim 1 to 4,
The evaluation method, wherein the motor function is at least one of flexibility of the body part and a range of motion of the body part. In the evaluation method as described in any one of Claim 1 to 5,
The second operation includes a plurality of operations,
The evaluation method, wherein each of the plurality of operations is an operation related to one or a plurality of joints of the user. In the evaluation method according to any one of claims 1 to 6,
An evaluation method further comprising a presentation step of presenting lesson content for the user in accordance with the first evaluation result and the second evaluation result. In the evaluation method according to any one of claims 1 to 6,
Obtaining a third evaluation result that evaluates at least one of the user's action accompanying the first action, the user's thought accompanying the first action, and a result of the first action The evaluation method further includes a third acquisition step. The evaluation method according to claim 8, wherein
An evaluation method further comprising a presentation step of presenting lesson contents for the user in accordance with the first evaluation result, the second evaluation result, and the third evaluation result. An evaluation system for evaluating a first action performed by a user,
At least one of joint torque for each joint of the user, joint power for each joint, and magnitude of contribution to the first motion for each joint in the first motion performed by the user was evaluated. A first acquisition unit for acquiring a first evaluation result;
A second acquisition unit configured to acquire a second evaluation result obtained by evaluating a motor function of a body part including each joint of the user by a second operation different from the first operation performed by the user; An evaluation system characterized by comprising.

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