KR101963624B1 - System and method for evaluation of exercise capacity of knee - Google Patents

Abstract

An inertial measurement device including a first inertial sensor fixed to the upper side of the knee joint and a second inertial sensor fixed to the lower side of the knee joint, and a second inertial sensor fixed to the first inertial sensor and the second inertial sensor, And data processing apparatus for calculating kinetic state data of the knee including translational motion data of the knee, bending motion data, and twist motion data through the data measured by the knee.

Description

[0001] SYSTEM AND METHOD FOR EVALUATING EXERCISE CAPACITY OF KNEE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and a method for evaluating a knee motion performance, and more particularly, to a system and a method for evaluating a knee motion performance for a knee restoration test of a knee.

Patients who underwent knee surgery, such as ACL reconstruction, should undergo continuous knee functional testing for rehabilitation and should be prescribed rehabilitation or exercise therapy depending on the results of the examination

Through various studies, the method for functional performance test (FPT) of the knee through specific sports items has been formalized.

Typical FPT evaluation items include a shuttle run test, a one leg hop test, a vertical jump test, and a Gait test.

The round trip test is an exercise item in which a turning point is designated at a predetermined distance and the patient evaluates the condition of the patient by allowing the patient to run the return point a predetermined number of times. The leg run test is an exercise sport that evaluates the condition of the patient by performing one leg run with the other leg in place. The vertical jump test is an exercise item that evaluates the condition of the patient by leaping the ground with a pair of legs and performing a jumping. Finally, the walking test is an exercise item that evaluates the condition of the patient by allowing the patient to walk a predetermined distance naturally.

Conventionally, the patient visits the medical institution periodically to perform evaluation items of the FPT in front of the medical staff, and the medical staff evaluates the knee condition of the patient by observing the motion of the patient visually.

In fact, if numerical information related to the joint state, such as an angle change of the knee joint, is presented, it is possible to provide intuitive and objective information to the evaluation of the medical staff, but there is no means to provide such information. At present, the objective data that the patient can obtain while performing the evaluation items of the FPT are merely data that do not directly relate to the kinetic state of the knee, such as the execution time of the exercise.

As shown in Patent Document 1, there is an example of automating the evaluation items of the FPT. However, it is not intended to provide numerical information related to the joint state such as an angle change of the knee joint, but merely for automating the measurement of the exercise time.

The evaluation of the knee joint condition is mainly based on the experience of the medical staff. Therefore, the patient must visit the medical institution and perform the FPT evaluation. Therefore, the evaluation site is limited, and the evaluation result may vary depending on the condition of the patient on the day of visit, so it may be difficult to obtain an objective prescription.

For medical practitioners, more and more direct and objective data are needed to assess the condition of the knee joint.

Patent Publication No. 10-2010-071198

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a method and apparatus for extracting objective data related to a motion of a knee, thereby improving diagnosis convenience of a medical staff, And a knee functional evaluation system and method that can be reflected in an examination environment.

According to an aspect of the present invention, there is provided an inertial measurement apparatus including an inertial measurement device including a first inertial sensor fixed to an upper side of a knee joint and a second inertial sensor fixed to a lower side of the knee joint, And a data processing device for calculating kinetic state data of the knee including translational motion data of the knee, bending motion data and twist motion data through the data measured by the inertial sensor and the second inertial sensor, System.

According to an embodiment, the data processing apparatus may further include: a menu for a plurality of sports items using a knee to a user; and an exercise ability evaluation item Is calculated.

According to one embodiment, the data processing apparatus processes data measured by the first inertial sensor and the second inertial sensor according to a data operation criterion designated for each exercise item selected by the user, Calculate the data.

According to one embodiment, the plurality of sports items may include an evaluation item for a functional performance test (FPT) of a knee through a designated operation, a shuttle run test, a one leg hop test test, a vertical jump test, and a Gait test.

According to one embodiment, the reciprocating running test may include an average travel time per round trip, an average travel distance per round trip, an average speed, a total travel distance, a total travel time, an average acceleration, a maximum twist angle of the knee at the redirection, The angle of inclination is included as an evaluation item, and the outward run test includes the maximum jump height, the jump time, the jump distance, the twist angle of the knee when treading and the bending angle of the knee at the jump, The height, the jump time, the twist angle of the knee at the time of jumping, and the bending angle of the knee at the jump are included as evaluation items, and the walking test may include the total moving distance, the total number of steps and the average stride.

According to one embodiment, the data processing apparatus provides an alarm for allowing the user to periodically perform the evaluation item.

According to one embodiment, the data processing apparatus records a change in the numerical value of the exercise ability evaluation item calculated each time the exercise item is performed.

According to one embodiment, the data processing criterion is a selection criterion of a stop section required for correction that minimizes an integration error generated in the process of calculating motion state data of the knee.

According to one embodiment, the stopping section may be a section where the foot is separated from the ground during exercise and the bending motion and the twisting motion of the knee are minimized.

According to one embodiment, the data processing apparatus is a portable terminal that communicates wirelessly with the inertial measurement apparatus.

According to another aspect of the present invention, there is provided a method for providing a user with a menu for a plurality of sports items using a knee, Speed, bending angle, and the like of the knee through the data measured and transmitted by the second inertial sensor fixed to the lower side of the knee joint, and a second inertial sensor fixed to the lower side of the knee joint, Calculating movement state data of a knee including a twist angle change; and calculating a value for the selected motion evaluation item using the knee motion state data.

According to one embodiment, the method of evaluating exercise capacity of the knee may further include extracting a data operation criterion ("selected exercise data calculation standard") for a sports item selected by the user among the information processing standards specified for each sport item have.

According to another aspect of the present invention, there is provided a computer program for executing a method of evaluating the kinematic ability of the knee.

According to another aspect of the present invention, there is provided a computer-readable recording medium on which a computer program for executing the method for evaluating the kinematic ability of the knee is recorded.

FIG. 1 illustrates a system for evaluating a knee's athletic performance according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram of a knee motion ability evaluation system according to an embodiment of the present invention.
FIG. 3 is a block diagram showing a data processing flow according to an event in the data processing apparatus of the knee motion ability evaluation system of FIG. 2; FIG.
FIG. 4 is a flow chart for performing exercise performance evaluation using a method of evaluating exercise capacity of a knee.
5 is a view showing a UI provided in evaluating the exercise capacity of the knee.
FIGS. 6 to 8 show kinetic state data of a knee when a user performs an evaluation item for evaluation of knee function.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited by the embodiments.

FIG. 1 illustrates a system for evaluating a knee's athletic performance according to an embodiment of the present invention.

The exercise capacity evaluation system includes an inertial measurement device 10 for measuring knee motion information and a data processing device 20 for calculating kinetic state data of the knee based on data measured by the inertial measurement device 10. Further, the athletic performance system may be a computer ("administrator computer") (e.g., a computer that is capable of communicating with the data processing apparatus 20 to view the exercise state data of the data processing apparatus 20 or update the data of the data processing apparatus 20 30). The administrator computer may be a server of a medical institution used by a medical staff or the like or a server of an administrator managing a data processing program of the data processing apparatus 20. [

The data processing apparatus 20 according to the present embodiment is a portable terminal ("user computer") such as a smart phone for wirelessly communicating with the inertial measurement apparatus 10 to receive information.

The exercise performance evaluation system does not include a user computer but may be configured as a data processing apparatus for a manager computer. However, by using the portable terminal as the data processing apparatus 20, So that it is possible to reflect the daily living conditions in the inspection environment.

1, the inertial measurement device 10 includes a first inertial sensor 11 fixed to the upper side (thigh) of the knee joint, a second inertial sensor 12 fixed to the lower side (calf) of the knee joint, .

The first inertial sensor 11 and the second inertial sensor 12 are coupled to a band 14, which is a functional material for pressing the calf in the user's thighs, so that the posture corresponding to the movement of the thighs and calves .

The first inertial sensor (IMU sensor) (11) and the second inertial sensor (12) may include an acceleration sensor and a gyro sensor, each of which outputs at least an acceleration and an angular velocity value.

The inertial measurement apparatus 10 includes a wireless transmission unit 13 for transmitting the measured values of the first inertial sensor 11 and the second inertial sensor 12 to the data processing apparatus 20. [ Although the wire connection between the inertial measurement device 10 and the data processing device 20 is not limited, according to the present embodiment, by transmitting the measured value of the sensor through wireless communication, have.

2 is a conceptual diagram of a system for evaluating the performance of the knee in accordance with the present embodiment.

2, the data processing apparatus 20 includes a communication unit 210 capable of communicating with the wireless transmission unit 13 of the inertial measurement apparatus 10, a processor 220 capable of processing various data, And a UI unit 240 for providing a user interface.

The UI unit 240 includes various devices capable of receiving information from a user such as a touch screen, a display and a key, a speaker and a microphone, and outputting information.

A first eigenframe (xyz coordinate system) is defined in the first inertial sensor 11 of the inertial measurement apparatus 10 and a second eigenframe (x'-y'-z ' Is defined.

The first inertial sensor 11 and the second inertial sensor 12 use acceleration and angular velocity information for the respective inherent coordinate system as output data. The data collected by the first inertial sensor 11 and the second inertial sensor 12 are transmitted to the data processing apparatus 20 through the wireless communication modules 13 and 13 '. As shown in FIG. 2, the bus communication modules 13 and 13 'are not integrated into one but two and may operate in association with the first inertial sensor 11 and the second inertial sensor 12, respectively.

The processor 220 of the data processing apparatus 20 calculates the motion state data of the knee by calculating the collected data of the inertial sensor.

According to the present embodiment, the kinetic state data of the knee includes translational motion data on the movement acceleration, the movement speed and the position of the knee, the bending motion data on the bending acceleration, the bending velocity and the bending angle of the knee joint, Torsional motions of acceleration, torsional velocity and twist angle (i. E. Relative motion of the thigh and calf relative to the knee joint) data.

Using the angular acceleration information of each inertial sensor 11 and 12 and the integration value according to the time, an angle? (Bending angle of the knee) between the z axis and the z 'axis and the change (acceleration, speed) . Using the angular acceleration information of the inertial sensors 11 and 12 and their integral values, the rotation state data (i.e., the twist motion data of the knee) of each of the inertial sensors 11 and 12 based on the z axis and the z 'axis, Can be calculated.

Using the acceleration information of each of the inertial sensors 11 and 12 and the integration value according to the time, and the bending motion data and the twist motion data of the knee joint, the translational motion data for the acceleration, the velocity and the position movement of the knee joint are calculated .

In addition to the translational and bending movements of the knee, the knee's torsional motion has a direct relationship with the joint state, such as the strength and flexibility of the knee joint.

The system for analyzing the motion state using the conventional inertial sensor is limited to the translational motion and the bending angle of the wearer of the inertial sensor, and the twisting motion of the joint is overlooked.

According to the present embodiment, an evaluation system optimized for evaluating the kinematic performance of the knee is provided by considering the translational motion data and the bending motion data of the knee as well as the knee warp motion data as the exercise state data for evaluation.

However, data that a medical staff needs to refer to may be only a part of the exercise items performed by the user, in particular, the evaluation items of the FPT, and specific items may be different for each exercise.

According to an embodiment of the present invention, a system for evaluating a kinematic performance of a knee can be used to selectively extract items only when considering the exercise capacity of the knee according to the exercise type among the kinetic state data of the knee.

FIG. 3 is a block diagram showing a data processing flow according to an event in the data processing apparatus 20, and FIG. 4 is a flowchart for performing exercise performance evaluation. FIG. 5 is a diagram illustrating a user interface (UI) provided when evaluating the exercise ability of the knee.

Referring to FIG. 3, the memory 230 stores data 231 for a plurality of sports items that can use the knee. In addition, in the memory 230, the athletic performance evaluation item data 232 designated for each sports item is stored, and the data calculation reference data 233 specified for each sports item is also stored.

5, when a program for evaluating the initial exercise capacity is executed, a start screen 21 is provided on the display of the data processing apparatus 20. [

The start screen 21 is provided with a function key for browsing the user profile setting (My profile setting), test start and exercise state data, or selecting a health mointing menu for executing the rehabilitation exercise protocol Is displayed.

When the user selects the profile entry function, a profile entry window 22 is provided and the user can enter a name, age, sex, weight, length of the thigh the upper leg, and the length of the lower leg.

The profile information may be stored in the memory 230 to identify a user, calculate a load applied to the knee, or be used as detailed correction data on the movement of the knee.

When the user finishes inputting the profile, it is provided on the restart screen 21, and when the user executes the test start function, a test for exercise performance evaluation is executed.

As described above, the memory 230 stores a plurality of exercise item data 231 using the knee, and a functional performance test (FPT) of the knee is performed for a plurality of sports items through a standardized designation operation The data of the evaluation item for the evaluation is included.

When the user executes the test start function, the event processing module 221 of the processor 220 reads the evaluation item data among the item data 231 of the memory 230 through the data management module 223, And provides a menu 23 for data to the user.

According to the present embodiment, the evaluation items for FPT evaluation include a shuttle run test, a one leg hop test, a vertical jump test, and a Gait test .

When the input event selected by one of the evaluation items by the user is inputted through the UI unit 240, the event processing module 221 reads the description data of the evaluation item selected by the user stored in the memory via the data management module 223 And provides it to the user through the UI unit 240. [

As shown in FIG. 5, the explanatory data may be a demonstration image 24 that demonstrates the selected exercise item, and the posture, condition, or rule of the exercise may be described through the demonstration image 24.

On the other hand, the event processing module 221 reads the athletic performance evaluation item data 232 through the data management module 223, and acquires an athletic performance evaluation item ("selected athletic performance evaluation item "). The data on the extracted selected athletic performance evaluation item is transmitted to the data processing module 222.

The data processing module 222 calculates the kinetic state data of the knee which changes over time based on the data measured by the first inertial sensor 11 and the second inertial sensor 12. [

Then, the data processing module 222 extracts numerical values corresponding to the selection exercise ability evaluation item from the knee motion state data. The extraction result for the selected athletic performance evaluation item can be displayed to the user through the result window 25.

According to this embodiment, in the case of the round running test, the average movement time per one round trip, the average movement distance per one round trip, the average speed until the completion of the exercise, the total travel distance, the total travel time, the average acceleration, The angle and the maximum bending angle of the knee are included as an evaluation item.

In the outward run test, the maximum jump height, the jump time, the jump distance, the twist angle of the knee at the stance and the bend angle of the knee at the jump are included as the evaluation items, and the vertical jump test includes the maximum jump height, And the bending angle of the knee at the time of the jump are included as evaluation items. In the case of a walking test, the total travel distance, the total number of steps and the average stride are included as an evaluation item.

Items such as evaluation items and athletic performance items according to sports events may be modified or added under the authority of the medical staff or the manager, depending on the needs of the medical staff or the needs of the manager.

On the other hand, unlike the case of obtaining information about uniform motion such as a mere walking condition of an inertial sensor, various types of exercise should be considered for evaluation of a comprehensive knee's athletic ability. At this time, various patterns of data are displayed for each type of motion.

Figs. 6 to 8 show the kinetic state data of the knee (the angle of the knee among them) appearing when performing the evaluation item.

Figure 6 relates to a vertical jump test, Figure 7 relates to an outrigger run test, and Figure 8 relates to a walk test.

As shown in FIGS. 6 to 8, the operation can be divided into a plurality of sections during the operation of one cycle, and the pattern in which the kinetic state data of the knee changes according to the section is completely different depending on the type of exercise .

In the method of calculating the measured value of the inertial sensor and extracting the data, the cumulative error (integration error) inevitably occurs according to the integral calculation.

As a method for correcting this, a stop section in which the inertial sensor is regarded as a stop state is determined, and the measurement value of the inertial sensor is zeroed at one point of the stop section so as not to be included in the integral operation, A correction technique for minimizing the cumulative error is used.

According to the present embodiment, the data calculation reference for the calculation processing of the measurement data of the inertial sensor, in particular, the correction calculation criterion for minimizing the integration error through the selection of the stationary interval, .

According to the present embodiment, a stopping period is specified as a period in which the bending motion of the knee and the change in the backward rim motion, which have a great effect on the knee joint motion, are minimized.

The above-mentioned stopping zones are different according to the sports events, and therefore the selection conditions are different.

For example, as shown in Fig. 6, in the case of the vertical jump test, the point of time of approximately step 6 in which the height of the knee reaches the highest point within the range of 4 to 7 in which the jump takes place is suitable for the zero ignition calculation standard.

Therefore, in the case of the vertical jump test, the condition for performing the zero-ignition correction at conditions for extracting the point reaching the peak point of Step 6 (for example, the velocity is the lowest, the acceleration maximum, the maximum joint angle, Data basis.

As shown in Fig. 7, in the case of the outrigger run test, the point of time of approximately step 5 in which the height of the knee reaches the highest point is suitable for the zero ignition calculation standard within the fourth to sixth steps in which the jump is likewise performed.

However, it is different from the vertical jump test in that, in the case of the outer leg run test, a peak at which the angle of the knee is instantaneously observed is observed in correspondence with the steps 3 and 7 of preparing or finishing the jump even if only the knee angle is observed.

In the case of the outrigger run test, conditions different from the vertical jump test to perform the zero-ignition correction at the highest joint angles, the presence of a sharp inflection point of the joint angles before and after, the twist angle minimum, etc.) .

As shown in Fig. 8, in the case of the walking test, the point of the step 1 in which the foot contacts the ground surface is also suitable for the zero ignition calculation standard.

However, in the case of the walking test, for example, the joint angle minimum, the speed minimum, and the like may be given based on the data calculation standard.

Here, although the data operation reference is described using the joint angles in Figs. 6 to 8, the data operation reference for the zero ignition correction operation can be set in consideration of the knee's translational motion data, the bending motion data, and the twist motion data collectively . Particularly, it may be preferable to select a stop period in which the change of the speed, the acceleration, and the angle (position) with respect to each exercise event is abruptly changed.

However, the data operation criterion is not limited only to the calculation criterion required for data correction, and may be considered in various forms according to various algorithms for processing the data of the inertial sensor.

According to the present embodiment, since the data operation criterion is previously provided for each exercise item, it is possible to effectively reduce errors and improve the data processing speed in data processing of the exercise items of different patterns.

3 to 5, when an input event selected by one of the evaluation items by the user is inputted through the UI unit 240, the event processing module 221 transmits the input event via the data management module 223 The calculation reference data 233 is browsed to extract data for a data calculation criterion ("selected data calculation criterion") designated for the user selected sports item.

Data for the extracted selected data operation criterion is transmitted to the data processing module 222. [

The data processing module 222 calculates the kinetic state data of the knee by applying a selected data operation criterion to the data measured by the first inertial sensor 11 and the second inertial sensor 12.

Through the above-described process, numerical values corresponding to the selected exercise ability evaluation items are extracted from the knee motion state data, and the extracted results are transmitted to the data management module 223.

The data management module 223 stores the extraction result data 234 in the memory 230 and transfers the extracted result data 234 to the event processing module 221. The event processing module 221 analyzes the extracted result data 234, To the user.

According to the exercise performance evaluation system according to the present embodiment, the user can perform an evaluation item for knee function evaluation at a desired place such as a house or a park without having to directly visit a medical institution.

Therefore, the user can repeatedly perform the evaluation item at a desired point in time. To help this, the athletic performance assessment system can periodically alert the user to perform the evaluation item.

In addition, when the exercise item is repeatedly performed in the memory 230, all the results of the exercise ability evaluation items calculated at each exercise are recorded. The recorded result values can be recorded as change trend data that can be expressed in the form of a graph, and the results obtained by averaging the repeated result values can also be recorded.

In response to the user's request, the data management module 223 may provide the change in the result values via the UI unit 240 in graph form or the like.

On the other hand, the medical staff or the administrator can request the data processing apparatus 20 to view the numerical data of the result of the exercise performance evaluation performed by the user through the administrator computer 30.

The event processing module 221 may inquire of the user through the UI unit 240 whether the user requests approval or not, and when granted, the data management module 223 requests the administrator And provides the manager computer 30 with the numerical data, the result transition data, and the result average data requested by the client computer 30.

The medical staff at the medical institution will be able to review the resulting numerical data, evaluate the athletic performance of the knee, and make appropriate prescriptions.

In this embodiment, the evaluation items for FPT are exemplified as a plurality of sports items to be provided to the user, but the present invention is not limited thereto.

The medical institution or the like may input a rehabilitation item for assisting the user's knee rehabilitation into the memory 230 of the data processing apparatus 20 by using the rehabilitation protocol through the administrator computer 30. [ At this time, a unique exercise ability evaluation item and a data operation criterion may be specified for each rehabilitation exercise item. Examples of rehabilitation items include stair climbing and squad exercises that can use the knee.

The user can perform rehabilitation exercise after selecting the rehabilitation exercise item through the health monitoring function, and the numerical value of the exercise ability evaluation item for the exercise can be calculated so that the exercise performance can be referred to.

According to the exercise capacity assessment system and method of the present invention, it is possible to directly reflect the state of daily life to the test environment without the involvement of a specialist such as a medical institution, and to provide accurate knee motion information to the medical staff. .

In addition, since direct data on the knee is provided, the medical staff can appropriately suggest a personalized exercise or physiotherapy, thereby greatly improving the convenience of diagnosis.

The above-described exercise capacity evaluation method of the knee is programmed and stored in a user's computer or an administrator's computer through communication or a recording medium, and can be executed by the corresponding computer.

According to the present embodiment, the data processing apparatus 20 is provided with the memory 230 and stores the exercise item data, the athletic performance evaluation item data, the data calculation reference data, the evaluation result data, and the like in the memory, The data may be stored in an administrator's computer or other server, and the data processing apparatus 20 may execute the program in a form of downloading the data.

Claims (14)

An inertial measurement device including a first inertial sensor fixed to the upper side of the knee joint and a second inertial sensor fixed to the lower side of the knee joint;
Providing a menu for a plurality of sports items using the knees and processing data measured by the first inertial sensor and the second inertial sensor according to a data operation criterion specified for each sports item selected by the user, A data processing device for calculating kinetic state data of the knee including translational motion data of the knee, bending motion data and warping motion data,
Wherein the data calculation criterion is a correction coefficient for correcting an integration error generated in the process of calculating the kinetic state data of the knee in order to correct a part of the data measured by the first inertial sensor and the second inertial sensor Wherein the stopping section is a selection criterion of a stopping section. The method according to claim 1,
The data processing apparatus includes:
And calculating a numerical value of the athletic performance evaluation item designated for the selected athletic item by the user using the athletic state data of the knee. delete 3. The method of claim 2,
The plurality of sports items may include:
One of the evaluation items for the Functional Performance Test (FPT) of the knee is the Shuttle run test, the One leg hop test, the Vertical jump test, And a test (Gait test). 5. The method of claim 4,
The reciprocating running test includes an average moving time per round trip, an average moving distance per round trip, an average speed, a total moving distance, a total moving time, an average acceleration, a maximum twist angle of the knee at the time of turning and a maximum bending angle of the knee And,
The outward run test includes the maximum jump height, the jump time, the jump distance, the twist angle of the knee when treading, and the bending angle of the knee at the jump,
In the vertical jump test, the maximum jump height, the jump time, the twist angle of the knee at the time of stepping, and the bend angle of the knee at the jump are included as evaluation items,
Wherein the walking test includes a total movement distance, a total number of steps, and an average stride as evaluation items. 5. The method of claim 4,
The data processing apparatus includes:
And an alarm is provided to allow the user to periodically perform the evaluation item. The method according to claim 6,
The data processing apparatus includes:
And records a change in the numerical value of the exercise performance evaluation item calculated for each exercise sport event. The method according to claim 1,
Wherein the data processing device does not include the data measured by the first inertial sensor and the second inertial sensor at zero point in the stop section in the zero integration and does not include the data in the integral calculation, And calculating the kinetic state data of the knee by performing integral calculation using the sensor and the data measured by the second inertial sensor. The method according to claim 1,
Wherein the stopping interval is a period in which a foot is separated from the ground during a movement and a change in a bending motion and a twisting motion of the knee is minimized. The method according to claim 1,
Wherein the data processing apparatus is a portable terminal that wirelessly communicates with the inertial measurement device. Providing a menu for a plurality of sports items using a knee to a user;
Extracting an evaluation item ("selection exercise evaluation item") for an exercise item selected by the user out of the athletic performance evaluation items designated for each exercise item;
A first inertial sensor fixed to the upper side of the knee joint according to a data operation criterion specified for each exercise item selected by the user, and a second inertial sensor fixed to the lower side of the knee joint, Calculating movement state data of the knee including acceleration, velocity, bending angle and twist angle change of the knee;
And calculating a value for the selected exercise evaluation item using the knee motion state data,
Wherein the data calculation criterion is a correction coefficient for correcting an integration error generated in the process of calculating the kinetic state data of the knee in order to correct a part of the data measured by the first inertial sensor and the second inertial sensor And a stopping period of the knee. 12. The method of claim 11,
Wherein calculating the kinetic state data of the knee comprises:
Wherein the first inertia sensor and the second inertial sensor zero-ignite the data measured at one point in time of the stop period and do not include the measured data in the integral calculation, And calculating the kinetic state data of the knee by performing integral calculation using data measured by the inertial sensor,
Wherein the stopping interval is a period in which a foot is spaced apart from the ground during a movement and a change in a bending motion and a twisting motion of the knee is minimized. delete A computer-readable recording medium having recorded thereon a computer program for executing the method of evaluating a kinematic ability of a knee according to claim 11 or 12.

Images