JP7442258B2 - Evaluation method and evaluation system - Google Patents

Description

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

Conventionally, in golf lessons, measuring instruments such as motion sensors and cameras are used to measure the golfer's body movements during the golf swing, and based on the externally visible information of the golfer's body movements obtained from the measurement, It was common for instructors to provide instruction to golfers.

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

Japanese Patent Application Publication No. 2012-139480

A golf swing is generally a physical movement using the golfer's entire body that progresses sequentially from address, backswing, top, downswing, impact, and finish. Therefore, in order for golfers to improve, it is important to not only evaluate a golfer's physical condition, but also evaluate how the golfer uses his or her body when making a golf swing, and provide instruction based on these evaluation results. It is. However, there is a problem in that the golfer's motion cannot be appropriately evaluated by only evaluating the physical condition as in the technique disclosed in Patent Document 1.

An object of the present invention, which was made in view of the above problems, is to provide an evaluation method and an evaluation system that can appropriately evaluate actions performed by a user.

An evaluation method as an aspect of the present invention is an evaluation method for evaluating a first movement performed by a user, and includes joint torque for each joint of the user in the first movement performed by the user, and joint torque for each joint of the user in the first movement performed by the user. a first acquisition step of acquiring a first evaluation result obtained by evaluating at least one of joint power and the magnitude of contribution to the first motion for each joint; and a first acquisition step performed by the user. and a second obtaining step of obtaining a second evaluation result obtained by evaluating a motor function of a body part of the user including each joint by a second action different from the action.
With the above configuration, it is possible to appropriately evaluate the actions performed by the user.

In the evaluation method according to the present invention, the contribution of each joint to the first movement is determined by the contribution of each joint to the moving speed of the exercise equipment used in the first movement and the contribution of each joint to the kinetic energy of the exercise equipment. Preferably, at least one of the contributions for each joint is present.
With the above configuration, it is possible to obtain an evaluation result of the contribution of each joint to the movement speed and kinetic energy of the exercise tool due to the first motion.

In the evaluation method according to the present invention, it is preferable that the first motion is a golf swing.
With the above configuration, a golf swing can be appropriately evaluated.

In the evaluation method according to the present invention, it is preferable that the moving speed of the exercise equipment is the head speed of the golf club, and the kinetic energy of the exercise equipment is the kinetic energy of the head of the golf club.
With the above configuration, it is possible to obtain evaluation results of the contribution of each joint to the head speed of the golf club and the kinetic energy of the head due to the golf swing.

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 range of motion of the body part.
With the above configuration, the first operation can be analyzed in more detail and evaluated appropriately.

In the evaluation method according to the present invention, it is preferable that the second motion includes a plurality of motions, and each of the plurality of motions is a motion related to one or more joints of the user.
With the above configuration, the motor function of each joint of the user can be evaluated.

The evaluation method according to the present invention preferably further includes a presentation step of presenting lesson content to the user according to the first evaluation result and the second evaluation result.
With the above configuration, appropriate lesson content can be presented to the user.

In the evaluation method according to the present invention, at least one of the user's action accompanying the first action, the user's thoughts accompanying the first action, and the result of the first action is evaluated. Preferably, the method further includes a third obtaining step of obtaining a third evaluation result.
By having the above configuration, the first operation can be evaluated more appropriately.

The evaluation method according to the present invention preferably further includes a presenting step of presenting lesson content to the user according to the first evaluation result, the second evaluation result, and the third evaluation result.
With the above configuration, appropriate lesson content can be presented to the user.

An evaluation system as one aspect of the present invention is an evaluation system that evaluates 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, and a joint torque for each joint of the user in the first motion performed by the user. a first acquisition unit that acquires a first evaluation result obtained by evaluating at least one of the joint power of each joint and the magnitude of contribution to the first motion of each joint; and a second acquisition unit that acquires a second evaluation result of evaluating the motor function of a body part including each joint of the user by a second operation different from the operation.
With the above configuration, it is possible to appropriately evaluate the actions performed by the user.

According to the present invention, it is possible to provide an evaluation method and an evaluation system that can appropriately evaluate a user's actions.

1 is a diagram showing a configuration example of an evaluation system according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration example of a first acquisition unit shown in FIG. 1. FIG. FIG. 2 is a diagram showing another configuration example of the first acquisition unit shown in FIG. 1; It is a figure which shows the example of attachment of the marker to a golfer when the position coordinate data acquisition part shown in FIG. 2A is a motion capture. 2A is a diagram showing an example of attaching a marker to a club when the position coordinate data acquisition unit shown in FIG. 2A is a motion capture device. FIG. It is a figure which shows an example of the joint torque calculated by the 1st calculation part shown in FIG. 2A. 2A is a diagram showing a display example of the contribution of each joint to the head speed of the club at each time during the swing, calculated by the second calculation unit shown in FIG. 2A. FIG. 2A is a diagram showing a display example of the cumulative value of the kinetic energy of the club head resulting from each joint of the golfer and the ratio of the cumulative value for each joint, calculated by the second calculation unit shown in FIG. 2A. FIG. 2A is a diagram illustrating a display example of joint torque for each joint calculated for a plurality of swings by the first calculation unit shown in FIG. 2A. FIG. 2A is a diagram for explaining coherence calculated by the first calculation unit shown in FIG. 2A. FIG. 2A is a diagram illustrating a display example of joint torque coherence for each joint calculated for a plurality of swings by the first calculation unit shown in FIG. 2A. FIG. 2A is a diagram showing a display example of the contribution of each joint to the club head speed calculated for a plurality of swings by the second calculation unit shown in FIG. 2A. FIG. 2A is a diagram showing an example of displaying the cumulative value of the kinetic energy of the club head resulting from each joint and the ratio of the cumulative value for each joint calculated for a plurality of swings by the second calculation unit shown in FIG. 2A. be.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In each figure, the same reference numerals indicate the same or equivalent components.

FIG. 1 is a diagram showing a configuration example of an evaluation system 1 according to an embodiment of the present invention. The evaluation system 1 according to this embodiment evaluates an action (first action) performed by a user, and presents lesson content to the user according to the evaluation result. In the following description, it will be assumed that the user is a golfer, and that the user evaluates the golfer's golf swing and presents lesson content.

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

The first acquisition unit 10 acquires at least one of the joint torque of each joint of the user, the joint power of each joint, and the magnitude of contribution of each joint to the first motion of the user in the first motion performed by the user. The evaluation result (first evaluation result) obtained by evaluating the first evaluation result is obtained. In this embodiment, the contribution of each joint to the first movement is the contribution of each joint to the moving speed of the exercise equipment used in the first movement, and the contribution of each joint to the kinetic energy of the exercise equipment. , at least on the one hand. The exercise equipment is, for example, a golf club (hereinafter sometimes referred to as a "club"). That is, the first motion is a golf swing. When the first motion is a golf swing, the movement speed of the exercise equipment is the head speed of the golf club. Furthermore, the kinetic energy of the sports equipment is the kinetic energy of the head of the golf club. Further, the exercise equipment may be, for example, a tennis racket. That is, the first motion may be a tennis swing. Below, the first motion will be explained using an example of a golf club. The first acquisition unit 10 acquires the information of the golfer during the golf swing, such as the joint torque of each joint of the user, the joint power of each joint, and the magnitude of contribution to the golf swing of each joint in the golf swing performed by the user. Obtain evaluation results of how you use your body. Here, the first acquisition unit 10 calculates, for example, the contribution of each joint to the club head speed and the kinetic energy of the club head as the magnitude of the contribution of each joint to the golf swing, although the details will be described later. Evaluate at least one of the joint-by-joint contributions to .

Below, 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 shown 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 position coordinate data of a predetermined part of the golfer's body and position coordinate data of a predetermined part of the club while the golfer is swinging the club, and outputs the data to the first calculation unit 13 . As the position coordinate data acquisition unit 11, for example, a motion capture device, an inertial sensor, etc. 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. FIG. 3A shows an example in which markers M01 to M34 are attached to 34 locations on the body. Further, as shown in FIG. 3B, a marker is attached to a predetermined portion of the club. FIG. 3B shows an example in which markers M35 to M38 are attached to four locations on the club. Marker M35 is attached to the grip end of the club. The marker M36 is attached to the shaft of the club. The marker M37 is attached to the tip of the shaft of the club. The marker M38 is attached to the proximal end of the shaft and perpendicular to the face surface of the head.

With markers attached to the golfer and the club, the golfer's swing is photographed from the surrounding area using a plurality of motion capture cameras (for example, 10 or more) at a predetermined sampling rate (for example, 100 Hz or more). The positional coordinate data acquisition unit 11 identifies the positional coordinates of each marker from the captured image of each motion capture camera, thereby obtaining positional coordinate data of a predetermined part of the golfer's body and positional coordinate data of a predetermined part of the club during the swing. 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 golfer's body during the swing and position coordinate data of a predetermined part of the club from the measurement results of each inertial sensor during the swing. When motion capture is used as the position coordinate data acquisition unit 11, large-scale equipment is required to attach markers to the golfer and the club and to photograph the golfer's swing with a large number of motion capture cameras. Furthermore, acquiring data requires a great deal of effort and time, such as wearing a special suit and calibrating a camera. On the other hand, when an inertial sensor is used as the positional coordinate data acquisition section 11, it is sufficient to simply attach the inertial sensor to the golfer and the club and acquire the positional coordinates of the inertial sensor. Therefore, compared to the case of using motion capture, 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.

FIG. 2B is a diagram illustrating another configuration example of the first acquisition unit 10. The position coordinate data acquisition section 11 shown in FIG. 2A can be replaced with the motion data acquisition section 15, as shown in FIG. 2B. The position coordinate data acquired by the position coordinate data acquisition unit 11 includes the position coordinates of markers attached to predetermined parts of the golfer's body and the club, and information on changes in the position coordinates over time. Therefore, it is possible to combine an existing rigid link model that includes positional coordinate information created in advance with motion data obtained by an inertial sensor attached to a predetermined part of the golfer and the club as the motion data acquisition section 15. In this case, the position coordinate data acquisition section 11 can be replaced with the motion data acquisition section 15.

When using an existing rigid link model that has been prepared (created) in advance and capturing the motion with an inertial sensor or the like, the orientation of the segment may be acquired instead of the position coordinates. By doing this, compared to the method of creating a rigid link model from positional coordinates, it is possible to eliminate misalignment of the marker attachment location and errors caused by the camera. Furthermore, since large-scale equipment is not required and initial settings such as camera calibration can be simplified, operational data can be acquired from any location.

A rigid link model is a model in which a human body is represented by 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 obtained from a sensor may be input. When using a single body model prepared (created) in advance, the calculation time can be shortened by simplifying the system. When using multiple body models prepared in advance, select the body model suitable for the golfer based on the golfer's attributes such as height, gender, and weight from among the multiple body models prepared in advance. can do.

The inertial sensor data is data indicating the amount of movement or posture of an inertial sensor attached to a predetermined part of a golfer and a club, and is detected by a 3-axis acceleration sensor, a 3-axis angular velocity sensor, or the like. These sensors can acquire various data such as position coordinates, speed, and angular velocity during swing motion. As shown in Figure 2A, it is possible to create a rigid link model using position coordinate data and run the analysis system, but as shown in Figure 2B, it is also possible to use a rigid link model prepared in advance. This does not require the use of large-scale equipment, and differences in the skill of instructors in attaching sensors to body measurement points are less likely to affect the results, making it easy to use in stores and other locations.

In a human body model, the length of each body part (segment), joint position, and initial posture are determined in advance, and by acquiring the moment-by-moment posture of each segment with sensors, it is possible to reproduce the movements of the whole body in real time. can. To obtain the orientation, it is sufficient to obtain the relative angle (Euler angle) or quaternion between adjacent segments. By calculating the posture of each segment from these data in order from the right hip (R.hip) position to the distal direction of the body, the posture of the entire human body model can be obtained, and from there It is also possible to estimate the displacement of each part. Similarly, regarding the club, assuming that the position of both hands and the position of the grip of the club match, the movement of the club can be estimated by inputting the posture of the club obtained by the above-mentioned sensor into a model prepared in advance. becomes possible.

It is assumed that the center of pressure of the golfer's foot (COP (Center of pressure) position) is on the line connecting the heel and toe at address, or that at least one of the left and right toes is aligned with the fixed point of the force plate. By taking the address parallel to the flight line direction and acquiring data, spatial synchronization with ground reaction force data can be performed.

Referring again to FIG. 2A, the ground reaction force data acquisition unit 12 acquires ground reaction force data of the golfer during a swing, and outputs it to the first calculation unit 13. As the ground reaction force data acquisition unit 12, for example, a force plate can be used. 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 his right foot on one and his left foot on the other, thereby acquiring the ground reaction force data. can be obtained. The ground reaction force data acquisition unit 12 acquires, as ground reaction force data, the force and moment applied to the force plate by, for example, a golfer's swing. The ground reaction force data acquisition unit 12 also acquires, as ground reaction force data, for example, a moment generated by friction around a vertical axis (free moment) and a position of the center of foot pressure of the golfer (COP position).

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

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

Next, a method for acquiring the first evaluation result by the first acquisition unit 10 will be described.

The first evaluation result acquisition method is such that 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 a predetermined part of the club while the golfer is swinging the club. a data acquisition step, or a motion data acquisition step in which the motion data acquisition unit 15 acquires motion data of a predetermined part of the golfer's body and motion data of a predetermined part of the club while the golfer is swinging the club; 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 during a swing; The human body is composed of the position coordinate data of the parts, the position coordinate data of the predetermined parts of the club, the ground reaction force data acquired in the ground reaction force data acquisition step, and the human body with a plurality of rigid body elements and joint elements connecting the rigid body elements. a first calculation step that calculates joint torque for each joint of the golfer based on the rigid body link model represented by the rigid body link model; and a second calculating step of calculating the contribution of torque and forces generated by the golfer's movements during the swing to the head speed of the club for each joint of the golfer. Below, the operations of the first calculation section 13 and the second calculation section 14 will be explained in more detail.

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

The first calculation unit 13 roughly performs kinematics calculation and 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 velocity of the center of gravity/the acceleration of the center of gravity, etc. as kinematics calculation. In addition, the first calculation unit 13 calculates, as a kinetic calculation, a joint torque of each joint of the golfer, a moment arm (a perpendicular line connecting the rotation axis and the line of action of force) for calculating equivalent torque, and the like.

First, kinematics calculation will be explained. The first calculation unit 13 first calculates the position coordinate data acquired by the position coordinate data acquisition unit 11 or the motion data acquired by the motion data acquisition unit 15, based on the existing rigid link model, etc. necessary for inverse dynamics calculation. The marker coordinate position and the orientation of each segment are calculated for calculation. Inverse dynamics calculation is a method of 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 positions and calculates the velocity/acceleration of each marker. Next, the first calculation unit 13 sets the local coordinate system, and calculates the posture/angular velocity/angular velocity/of each segment in the rigid link model representing the golfer's body in the local coordinate system based on the calculated velocity/acceleration of each marker. Calculate angular acceleration, center of gravity position/center of gravity velocity/center of gravity acceleration, etc. Note that the first calculation unit 13 uses the body part inertia coefficient as necessary in each of the calculations described above.

Next, kinetics calculation will be explained. The first calculation unit 13 calculates the joints of the golfer using inverse dynamics calculation 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. Calculate the joint torque for each joint. For example, as shown in FIG. 4, the first calculation unit 13 calculates the golfer's neck, right shoulder, right elbow, right wrist, and left shoulder. L.shoulder), left elbow (L.elbow), left wrist (L.wrist), torso (Torso), right hip (R.hip), right knee (R.knee), right ankle (R.ankle), Joint torques in three axis directions (X-axis, Y-axis, Z-axis) are calculated for each of the left hip (L.hip), left knee (L.knee), and left ankle (L.ankle). Further, the first calculation unit 13 calculates the ground reaction force generated by the golfer's swing based on the ground reaction force data. Further, the first calculation unit 13 calculates a moment arm for calculating an equivalent torque of the calculated torque.

The first calculation unit 13 outputs the kinematics calculation and the calculation results of the kinetics calculation to the second calculation unit 14.

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

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 equations (2) and (3). Note that these calculations are well known to those skilled in the art, so detailed explanations will be omitted.

By multiplying both sides of equation (5) by the mass M _head of the club head, the following equation (6) is obtained.

The second calculation unit 14 calculates the contribution of each joint to the head speed of the club, so that, for example, as shown in FIG. The contribution of each joint in can be superimposed and displayed on a display unit (not shown). In Figure 5, joints that are accelerating the head speed (joints that are making a positive contribution) are marked with diamonds, and joints that are decreasing the head speed (joints that are making a negative contribution) are marked with a diamond. is marked with a circle. Furthermore, in FIG. 5, the magnitude of contribution for each joint is shown by the size of the mark attached to the joint. As shown in Figure 5, by superimposing and displaying the contribution of each joint at each time during the swing on the golfer's body, it is easy to see what kind of contribution each joint is making at each stage of the swing. can be grasped.

Further, the second calculation unit 14 may calculate the ratio of the contribution of each joint to the contribution of all the joints whose contributions have been calculated. By doing so, it is possible to grasp the degree of contribution of each joint in more detail.

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

FIG. 6 is a diagram showing an example of the display of the cumulative 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, the second calculation unit 14 calculates, for each joint of the golfer, at each time during the swing, the cumulative value of the kinetic energy of the club head caused by the joint of the golfer up to that time. and can be displayed on the display unit. The sum of the cumulative values of the kinetic energy of the club head caused by each joint at a certain time corresponds to the kinetic energy of the club head at that time.

The second calculation unit 14 also calculates, for each joint, the cumulative value of the kinetic energy of the club head caused by each joint of the golfer at a specific timing during the swing (for example, the timing of impact). It's okay. By doing this, as shown in FIG. 6, the second calculation unit 14 calculates the ratio of each joint to the total kinetic energy of the club head at a specific timing during the swing (in FIG. 6, the timing of impact). can be displayed on the display.

The second calculation unit 14 also compares the contribution of each joint to the head speed of the club calculated for the first swing and the contribution of each joint to the head speed of the club calculated for the second swing. You can also output the results. That is, the second calculation unit 14 calculates the contribution of each joint to the head speed of the club for each of the plurality of swings, compares the contribution of each joint to the head speed of the club calculated for each swing, and calculates the comparison result. You can also output it. By doing this, it is possible to extract differences in the contribution of each joint between swings and identify factors that cause differences 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 (a first swing and a second swing) by the same golfer. Then, the second calculation unit 14 calculates the difference between the contribution of each joint to the head speed of the club calculated for the first swing and the contribution of each joint to the head speed of the club calculated for the second swing in a time series. A point with a large difference may be extracted as a factor causing a difference in head speed.

In addition, the second calculation unit 14 calculates the difference between the contribution of each joint to the head speed of the club calculated for the first swing and the contribution of each joint to the head speed of the club calculated for the second swing in a time series. Alternatively, an index indicating the degree of golfer's improvement may be calculated by comparing the results. For example, the second calculation unit 14 uses the swing as an index indicating the degree of improvement of the golfer, depending on the degree of coincidence of the contribution of each joint to the head speed of the club calculated for each of the first swing and the second swing. An index indicating the degree of stability may be calculated. By doing this, it is possible to more effectively evaluate the degree of golfer's improvement using a more objective indicator of the contribution of each joint to the biomechanically calculated club head speed.

Further, the second calculation unit 14 sets the first swing to be a swing by a golfer, sets the second swing to a target swing (for example, a swing by an advanced golfer), and calculates the improvement of the golfer who made the first swing. An index indicating the degree may be calculated. That is, the second calculation unit 14 calculates 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 (model swing). By comparing the difference with the contribution over time, an index indicating the degree of improvement of the golfer who made the first swing may be calculated. For example, the second calculation unit 14 calculates the degree of improvement of the golfer who made the first swing according to the degree of coincidence of the contribution of each joint to the head speed of the club calculated for each of the first swing and the second swing. You may also calculate an index that indicates. By doing this, it is possible to more effectively evaluate the degree of golfer's improvement using a more objective indicator of the contribution of each joint to the biomechanically calculated club head speed.

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

Further, the kinematics calculation and kinetics calculation for each joint by the first calculation unit 13 and the calculation of the contribution of each joint to the head speed of the club by the second calculation unit 14 are performed for a plurality of swings, and each The calculation results regarding the swing may be displayed for comparison. That is, the first calculation unit 13 performs kinematics calculation and kinetics calculation for each joint of the golfer for each of the plurality of swings, and calculates at least one of the calculation results for each joint of the golfer calculated for each of the plurality of swings. It may be displayed for comparison. Further, the first calculation unit 13 may display the golfer's joint torques calculated for each of the plurality of swings so that they can be compared. Furthermore, for each of the plurality of swings, the second calculation unit 14 calculates, for each joint of the golfer, the contribution of the joint torque of each joint of the golfer and the force generated by the golfer's motion during the swing to the head speed of the club. , the contribution of each joint of the golfer calculated for each of a plurality of swings may be displayed for comparison. Further, the first calculation unit 13 may display the kinematics calculation results calculated for each of the plurality of swings so that they can be compared.

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 the result on the display unit. May be displayed. By doing so, it is possible to easily understand in which joint there is a large difference between the first swing and the second swing.

The first calculation unit 13 also calculates, for each joint, the coherence (correlation value) between the joint torque calculated for the first swing and the joint torque calculated for the second swing, and displays it on the display unit. It's okay. The first calculation unit 13 calculates coherence based on, for example, the following equation (8).

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

Further, the second calculation unit 14 may display on the display unit the contribution of each joint to the head speed of the club calculated for each of the first swing and the second swing so as to be comparable. For example, as shown in FIG. 10, the second calculation unit 14 displays the contribution of each joint to the head speed of the club, calculated for each of the first swing and the second swing, in chronological order as a stick picture. The information may be displayed on the display unit superimposed on the golfer's body. As shown in FIG. 10, by displaying the contribution of each joint to the head speed of the club calculated for the first swing and the second swing side by side, for example, in the first swing, the club is moved from the top position. The difference between the first swing and the second swing is that the contribution from the lower body is large in the period leading up to the downward impact, and in the second swing, the deceleration of the club by the shoulder joint is noticeable before impact. It is easy to understand the difference between the two.

Further, the second calculation unit 14 calculates the cumulative value of the kinetic energy of the club head resulting from each joint, calculated for each of the first swing and the second swing, or the total kinetic energy of the club head, calculated for each of the first swing and the second swing. The ratio of the cumulative value of kinetic energy for each joint may be displayed on the display unit for comparison. For example, as shown in FIG. 11, the second calculation unit 14 calculates the cumulative value of the kinetic energy of the club head resulting from each joint calculated for the first swing, and the cumulative value of the kinetic energy of the club head resulting from each joint calculated for the second swing. The cumulative value of the kinetic energy of the club head caused by this may be displayed on the display unit. Further, as shown in FIG. 11, the second calculation unit 14 calculates the kinetic energy of the club head resulting from each joint calculated for the first swing at a specific timing during the swing (for example, the timing of impact). The ratio of the cumulative value for each joint of the cumulative value of , and the ratio for each joint of the cumulative value of the kinetic energy of the club head 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. If the first swing and the second swing are by different golfers, for example, the first swing is a swing by a golfer taking lessons, and the second swing is a swing by an advanced golfer (with a target golfer). 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 calculates the joint torque for each joint of the user in the first movement (golf swing) calculated by the first calculation unit 13 and the joint torque calculated by the second calculation unit 14. In addition, the joint power of each joint or the magnitude of contribution of each joint to the first motion is output to the presentation unit 40 as a first evaluation result.

The second acquisition unit 20 obtains the evaluation results obtained by evaluating the motor function of the user's body parts including each joint using a second movement different from the first movement performed by the user (a golf swing in this embodiment). (second evaluation result). The exercise 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 motion is, for example, a motion for evaluating the flexibility and range of motion of the user's body part, and includes, for example, a plurality of motions. Each motion constituting the second motion is a motion related to one or more joints of the user (a motion for evaluating the motor function of one or more joints). Therefore, it is possible to obtain motor function evaluation results for each joint of the user.

The second operation consists of, for example, the following seven operations.

The first movement is to squat down with both arms holding the bar extended upwards. The first motion is motion related to joints such as the shoulder, hip joint, knee, and ankle.

The second movement is to straddle a hurdle while carrying the bar on your shoulders. The second motion is related to each joint of the leg.

The third movement is to line up your left and right legs one behind the other on a long, narrow platform, hold the bar up and down with your back, and step forward on the platform. The third motion is motion related to joints such as the shoulder, hip joint, knee, and ankle.

The fourth movement is to rotate the left and right fists from above and below towards the back. The fourth motion is motion related to joints such as the neck, chest, and shoulders.

The fifth movement is to lie on your back and raise one leg while keeping your knees straight. The fifth motion is a motion related to the hip joint.

The sixth action is to start from a state of crawling on all fours, alternately touch the elbow and knee on the same side, then stretch, and then return to the original state. The sixth motion is related to the shoulders, hip joints, etc.

The seventh movement is to lie face down with your legs shoulder-width apart, your hands on an extension of your shoulders, and your elbows extended. The seventh motion is a motion related to the trunk (torso).

The user performs the various actions described above, and, for example, an instructor evaluates whether the user is performing each action correctly. The second acquisition unit 20 acquires the evaluation result as a second evaluation result. Note that in this embodiment, the second operation has been described using the example of the seven operations described above, but is not limited to this. In short, the second motion may be any motion that can evaluate the motor function (for example, flexibility and range of motion) of a 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 is configured to obtain an evaluation result (e.g. 3 evaluation results). The third evaluation result includes, for example, the user's movement accompanying the golf swing (first movement) on the simulator simulating play on a golf course, the user's thoughts accompanying the golf swing, and the user's thoughts accompanying the golf swing. It is obtained by evaluating at least one of the results. When the first action is a golf swing, Table 1 shows examples of evaluation items for each of the user's actions accompanying the golf swing, the user's thoughts accompanying the golf swing, and the results of the golf swing.

For example, an instructor evaluates the evaluation items of the user's actions associated with the golf swing, the user's thoughts associated with the golf swing, and the results of the golf swing, as shown in the table above. 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 content to 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 mentioned above, the first evaluation result is the joint torque of each joint of the user, the joint power of each joint, and the contribution of each joint to the first movement in the first movement (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 the user uses his or her body in the first action. Further, the second evaluation result is an evaluation result of the motor function of the user's body part based on the second movement 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 range of motion of the user's body part including each joint, for example. In this way, the first action can be appropriately evaluated by obtaining the evaluation result of how the user uses his or her body in the first action and the evaluation result of the state of the user's body parts. By presenting the lesson content according to the evaluation result of the first movement and the evaluation result of the second movement, more appropriate lesson content can be presented.

Note that the presentation unit 40 holds a table in which lesson contents are predefined according to, for example, how the user uses the body in the first movement and the state of the user's body parts, and this table can be referred to. Then, the lesson content is presented according to the first evaluation result and the second evaluation result.

The presentation unit 40 also receives the first evaluation result output from the first acquisition unit 10 , the second evaluation result output from the second acquisition unit 20 , and the output from the third acquisition unit 30 . The content of the lesson may be presented to the user according to the third evaluation result.

Next, a method for evaluating the first motion 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 calculates the joint torque of each joint of the user, the joint power of each joint, and the contribution of each joint to the first movement in the first movement performed by the user. a first acquisition step of acquiring a first evaluation result obtained by evaluating at least one of the sizes of , a second obtaining step of obtaining a second evaluation result of evaluating the motor function of a body part including each joint of the user. Here, the contribution of each joint to the first motion is, for example, at least one of the contribution of each joint to the moving speed of the sports equipment used in the first motion, and the contribution of each joint to the kinetic energy of the sports equipment. It is. Further, the first motion is, for example, a golf swing. Further, the moving speed of the exercise equipment is, for example, the head speed of a golf club. Furthermore, the kinetic energy of the sports equipment is the kinetic energy of the head of the golf club. Further, the contribution of each joint to the first motion is, for example, at least one of the contribution of each joint to the head speed of the club and the contribution of each joint to the kinetic energy of the head of the club.

Further, the motor function is, for example, at least one of flexibility and range of motion of the user's body part. Further, the second operation is, for example, composed of a plurality of operations. Each of the plurality of motions is a motion associated with one or more joints of the user.

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

Further, in the evaluation method according to the present embodiment, the third acquisition unit 30 acquires the user's actions accompanying the first action, the user's thoughts accompanying the first action, and the results of the first action. The method may further include a third obtaining step of obtaining a third evaluation result obtained by evaluating at least one of the evaluation results.

Furthermore, the evaluation method according to the present embodiment may further include a presentation step of presenting the lesson content 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 content by the presentation unit 40 will be described.

For example, assume that the first evaluation result of the user's golf swing reveals a problem that "the joint power of the hip joint is low." In this case, if the lesson content is presented based only on the first evaluation result, the uniform lesson content will be presented regardless of the state of the user's body parts. However, in the present embodiment, by acquiring the second evaluation result (evaluation result of the motor function of the user's body part), it is possible to analyze the cause of the above problem in more detail.

For example, even among users who have the problem of "low joint power in the hip joint," there are users who have problems with the motor function of the shoulder joint and users who have problems with the motor function of the hip joint. Even if a uniform lesson content is presented to such users, it may not be possible to provide an effective lesson. On the other hand, in this embodiment, by presenting the lesson content according to the first evaluation result and the second evaluation result, it is possible to present the lesson content more suitable for each user.

For example, a user with low joint power in the hip joint due to the motor function of the shoulder joint will not be able to rotate or twist the upper body sufficiently, so they will backswing with only their arms, and as a result, they will have to use the arm to prevent overswing. It can be inferred that the movement of the lower body is suppressed. For such users, in order to improve the motor function of the shoulder joints, lesson content is presented that, for example, increases rotation of the thoracic vertebrae.

In addition, users who have low joint power in the hip joint due to the movement function of the hip joint will not have sufficient extensibility of the hip joint and tensor fasciae latae, so they will use their right foot (or left foot in the case of left-handed players) during the backswing. It can be inferred that the joint power of the hip joint is reduced because the player cannot maintain his footing and swings with his hips pulled back. For such users, lesson content is presented to improve the motor function of areas caused by hip joint movement, such as the tensor fasciae latae.

Moreover, by acquiring the third evaluation result, it is possible to evaluate the golf swing more appropriately. For example, suppose that the third evaluation result for the above-mentioned user who has low joint power in the hip joint due to the movement function of the hip joint is that the directionality of the ball launched is poor. In this case, in addition to the wrong direction of address, it can be assumed that the cause is that the center of gravity shifts and the axis shakes during the swing due to the inability to press firmly with the right foot during the backswing. . From this estimation result, it can be inferred that there is a problem with the motor function of the hip joint, and lesson content suitable for the user can be presented more accurately.

As described above, the evaluation method according to the present embodiment is able to evaluate the joint torque of each joint of the user, the joint power of each joint, and the magnitude of the contribution of each joint to the first movement of the user in the first movement performed by the user. A first acquisition step of acquiring a first evaluation result of at least one evaluation, and a second operation different from the first operation performed by the user, to evaluate the motor function of the body part including each joint of the user. A second obtaining step of obtaining the second evaluated evaluation result is included.

The evaluation device according to the present embodiment also evaluates at least one of the joint torque of each joint of the user, the joint power of each joint, and the magnitude of contribution of each joint to the first motion of the user in the first motion performed by the user. The first acquisition unit 10 acquires the first evaluation result obtained by evaluating the first evaluation result, and the second operation performed by the user, which is different from the first operation, evaluates the motor function of the user's body parts including each joint. It includes a second acquisition unit 20 that acquires the second evaluated result.

In the first movement, evaluation results of how the user uses the body, such as joint torque, joint power, and the contribution of each joint to the first movement, and body parts, which are the motor functions of the user's body parts including each joint. By acquiring the evaluation results of the state of , it is possible to appropriately evaluate the actions performed by the user based on these evaluation results.

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

1 Evaluation System 10 First Acquisition Unit 11 Position Coordinate Data Acquisition Unit 12 Ground Reaction Force Data Acquisition Unit 13 First Calculation Unit 14 Second Calculation Unit 15 Movement Data Acquisition Unit 20 Second Acquisition Unit 30 Third Acquisition Part 40 Presentation part

Claims (7)

An evaluation method for evaluating a first action performed by a user, the method comprising:
Obtaining a first evaluation result in which a magnitude of contribution of each joint of the user to the first movement performed by the user is evaluated using either motion capture or an inertial sensor. a first acquisition step of
a second acquisition step of acquiring a second evaluation result of evaluating the motor function of a body part of the user including each joint by a second movement different from the first movement performed by the user;
a third obtaining step of obtaining a third evaluation result obtained by evaluating at least one of the user's action accompanying the first action and the user's thoughts accompanying the first action; and,
a presenting step of presenting lesson content to the user according to the first evaluation result, the second evaluation result, and the third evaluation result;
including;
The first motion is a motion of shaking the exercise equipment,
The second operation is an operation that evaluates the motor function of a body part including each joint of the user,
The third evaluation results include the user's actions accompanying the first action performed by the user on a golf course or a simulator imitating a golf course, and the user's actions accompanying the first action. is an evaluation of at least one of the thoughts ,
In the presenting step, based on the second evaluation result and the third evaluation result, infer the cause of the problem in the first action by the user obtained from the first evaluation result, and An evaluation method characterized by presenting lesson content to the user according to a result of the estimation . In the evaluation method according to claim 1,
The contribution of each joint to the first motion is at least one of 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. , evaluation method. In the evaluation method according to claim 2,
The evaluation method, wherein the first motion is a golf swing. In the evaluation method according to claim 3,
The movement speed of the exercise equipment is the head speed of a golf club,
The kinetic energy of the exercise equipment is the kinetic energy of the head of a golf club. In the evaluation method according to any one of claims 1 to 4,
The evaluation method, wherein the motor function is at least one of flexibility of the body part and range of motion of the body part. In the evaluation method according to any one of claims 1 to 5,
The second operation consists of a plurality of operations,
The evaluation method, wherein each of the plurality of motions is a motion related to one or more joints of the user. An evaluation system that evaluates a first action performed by a user,
Obtaining a first evaluation result in which a magnitude of contribution of each joint of the user to the first movement performed by the user is evaluated using either motion capture or an inertial sensor. a first acquisition unit,
a second acquisition unit that acquires a second evaluation result of evaluating a motor function of a body part of the user including each joint by a second movement different from the first movement performed by the user;
a third acquisition unit that acquires a third evaluation result obtained by evaluating at least one of the user's action accompanying the first action and the user's thoughts accompanying the first action; and,
a presentation unit that presents lesson content to the user according to the first evaluation result, the second evaluation result, and the third evaluation result;
Equipped with
The first motion is a motion of shaking the exercise equipment,
The second operation is an operation that evaluates the motor function of a body part including each joint of the user,
The third evaluation results include the user's actions accompanying the first action performed by the user on a golf course or a simulator imitating a golf course, and the user's actions accompanying the first action. is an evaluation of at least one of the thoughts ,
The presentation unit estimates the cause of the problem in the first action by the user obtained from the first evaluation result, based on the second evaluation result and the third evaluation result, and An evaluation system characterized by presenting lesson content to the user according to a guess result .

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