KR101670134B1 - Diagnosis Apparatus For Dizziness - Google Patents

Abstract

According to the present invention, an acceleration sensor unit (110) carried or attached to a body of a subject to measure an acceleration of the body; Calculates the center-of-mass coordinates of the body based on the acceleration information measured through the acceleration sensor unit 110, calculates the area of the extracted Convex Hull by extracting the Convex Hull of the calculated center-of-mass coordinate data, A microcontroller 120 for generating a graph of the area change of the Convex Hull with respect to the center of mass of the sample; And a memory (130) for storing an area change graph of the generated Convex Hull.

Description

{Diagnosis Apparatus For Dizziness}

The present invention relates to a dizziness diagnostic apparatus, and more particularly, to a dizziness diagnostic apparatus capable of providing precise monitoring data necessary for diagnosing dizziness by applying measurement information obtained from an acceleration sensor unit or a pressure plate to a Convex Hull or Ellipse Area analysis method ≪ / RTI >

Human body balance is controlled by three rotational sensors (semicircular canals) and two horizontal-vertical sensors (Maculae) in the vestibule of the Iinner Ear.

Concretely, the body balance signals continuously generated in the vestibular vestibular systems of both nerves are used to maintain VOR (Vestibulo-Ocular Reflex) and VSR (Vestibular-Spinal Reflex) through the brainstem, If an abnormality occurs in a series of vestibular reflex (VOR) and vestibular reflex (VSR), human being feels dizziness and difficult to stand upright.

Therefore, a commonly used dizziness diagnostic device is a device for checking the above-mentioned two reflection paths, and a nystagmus for observing the vestibular reflex, that is, an electroogloss (EOG) Image Vision (VOG, Videooculograph) is used. In addition, temperature or rotational stimulation may be used for the horizontal rotation sensor to observe the evoked nystagmus.

On the other hand, for the vestibular reflex, there is an attitude-checking device that uses the distribution of the pressure applied to the EMG or sole, but it has a small diagnostic value and is often used for monitoring the treatment results.

As described above, all conventional diagnostic apparatuses visit the hospital and evaluate the equilibrium function through spontaneous nystagmus or induced nystagmus within a limited time. Diagnosis is possible in patients with acute or subacute phase There are significant limitations in the diagnosis of dizziness that occurs accidentally in the chronic phase or in daily life.

In other words, even if dizziness occurs intermittently or the frequency of dizziness is high, dizziness may not be induced at the time of medical examination. In such a case, information about the unbalance sensation felt by the patient can not be obtained through the conventional diagnosis device, It has been impossible to objectively diagnose how much it has improved in daily life even after treatment, or to diagnose limitedly in an artificial environment.

"A Study on Equilibrium Strategies and Reaction Times of Elderly and Adolescents Using Dynamic Posture Analyzer," Journal of Korean Society of Sports Medicine, vol. 17 (2), pp. 959-968, 2008.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide measurement information obtained from an acceleration sensor unit or a pressure plate to a Convex Hull or an Ellipse Area Provides a dizziness diagnostic device that can precisely diagnose the occurrence and degree of dizziness caused by accident or chronic dizziness in everyday life by generating and providing accurate monitoring data necessary for diagnosis of dizziness by applying and processing it to analysis method .

According to an aspect of the present invention, there is provided an apparatus for diagnosing dizziness, comprising: an acceleration sensor unit (110) carried or attached to a body of a subject to measure an acceleration of the body; Calculates the center-of-mass coordinates of the body based on the acceleration information measured through the acceleration sensor unit 110, calculates the area of the extracted Convex Hull by extracting the Convex Hull of the calculated center-of-mass coordinate data, A microcontroller 120 for generating a graph of the area change of the Convex Hull with respect to the center of mass of the sample; And a memory 130 for storing an area change graph of the generated Convex Hull.

Here, the microcontroller 120 selects a coordinate point of a condition that all the coordinate points except the coordinate point on the basis of any one coordinate point arranged at the outermost corner among the respective mass center coordinate data can be placed on a straight line Then, Convex Hull, which is the minimum polygon surrounding each selected coordinate point, is extracted by repeating the procedure of selecting the coordinate point of the condition based on the selected coordinate point, and the Convex Hull extracted by applying the following Equation (1) And the area is calculated.

[Equation 1]

(Where Area is the area of the Convex Hull, xn is the x-axis coordinate value obtained by calculating Convex Hull, and yn is the y-axis coordinate value obtained by calculating Convex Hull)

The acceleration sensor unit 110 is a WRC (Wii Remote Controller) of Nintendo Co. The micro controller 120 controls the roll and pitch of the upper remote controller WRC, The center of gravity coordinates can be calculated using the following equation (2) using the concept of the center of mass projected to the bottom from the measured acceleration information.

&Quot; (2) "

,

,

,

,

,

,

Where A is the Euclidean size of the acceleration value of each of the three axes, ax is the x axis acceleration, ay is the y axis acceleration, az is the z axis acceleration, alpha is the angle between A and x axes, Where d is the center of mass projected in the plane, dz is the height from the bottom, dx is the center of mass in the X axis, and dy is the center of mass in the Y axis)

The microcontroller 120 calculates the center-of-gravity coordinates of the body based on the acceleration information measured by the acceleration sensor unit 110, calculates an Ellipse Area of the calculated center-of-gravity coordinate data, The memory 130 generates an area change graph of the Ellipse Area with respect to the center of mass of the Ellipse Area, and the memory 130 may store an area change graph of the generated Ellipse Area.

Also, the microcontroller 120 calculates an Ellipse Area estimated using only data including 95% based on the distribution of the center-of-mass coordinate data, and calculates the Ellipse Area using the following equation (3) can do.

&Quot; (3) "

(Where a is the major axis radius of the ellipse and b is the minor axis radius)

And a pressure plate (140) formed in a horizontally arranged plate shape and arranged so as to be dispersedly arranged with a plurality of pressure sensors, the pressure plate being installed so as to touch the sole of the subject, Calculates pressure center coordinates of the body by receiving pressure information measured through the pressure plate 140, calculates the area of the extracted convex hull by extracting Convex Hull of each of the calculated pressure center coordinate data, A graph of the area change of the Convex Hull with respect to the time of the pressure center of the body is generated and the memory 130 can store a graph of the area change of the generated Convex Hull.

The microcontroller 120 receives the pressure information measured through the pressure plate 140, calculates the pressure center coordinates of the body, calculates an Ellipse Area of each of the calculated pressure center coordinate data, The memory 130 generates an area change graph of the Ellipse Area with respect to the center, and the memory 130 may store an area change graph of the generated Ellipse Area.

The pressure plate 140 is a WBB (WBB) balance board of a Nintendo company. The microcontroller 120 calculates a pressure difference value The pressure center coordinates can be calculated by applying Equation (4).

&Quot; (4) "

(CoPx is the pressure center of the X axis, CoPy is the pressure center of the Y axis, CoPxy is the Euclidian size of the pressure center, Fxo, Fxy, F00 and Foy are the pressures from the pressure sensors disposed at the respective corners of the pressure plate 140 Respectively)

According to another aspect of the present invention, there is provided an apparatus for diagnosing dizziness, comprising: an acceleration sensor unit (110) carried or attached to a body of a subject to measure an acceleration of the body; The center of gravity of the body is calculated by calculating the acceleration information measured by the acceleration sensor unit 110, and the calculated Ellipse Area of each center-of-mass coordinate data is calculated to calculate the Ellipse Area A microcontroller (120) for generating an area change graph of the area; And a memory 130 for storing an area change graph of the generated Ellipse Area.

According to another aspect of the present invention, there is provided a dizziness diagnostic apparatus comprising: a plurality of pressure sensors arranged in a horizontally arranged plate shape and disposed to be in contact with a sole of a subject; (140); Calculates the pressure center coordinates of the body based on the pressure information measured through the pressure plate 140, calculates the area of the extracted Convex Hull by extracting the Convex Hull of each of the calculated pressure center coordinate data, A microcontroller (120) for generating an area change graph of Convex Hull with respect to the center; And a memory 130 for storing an area change graph of the generated Convex Hull.

According to another aspect of the present invention, there is provided a dizziness diagnostic apparatus comprising: a plurality of pressure sensors arranged in a horizontally arranged plate shape and disposed to be in contact with a sole of a subject; (140); Calculating the pressure center coordinates of the body based on the pressure information measured through the pressure plate 140, calculating the calculated Ellipse Area of each pressure center coordinate data, calculating an area of the Ellipse Area A microcontroller (120) for generating a change graph; And a memory 130 for storing an area change graph of the generated Ellipse Area.

According to the dizziness diagnostic apparatus of the present invention, the measurement information obtained from the acceleration sensor unit 110 or the pressure plate 140 is supplemented with the Convex Hull or Ellipse Area analysis method in order to compensate for limitations in diagnosing dizziness occurring in daily life By applying and processing the accurate monitoring data necessary to diagnose dizziness, the observer of the doctor can observe it and accurately diagnose the occurrence or degree of dizziness or dizziness that occurs accidentally in daily life.

1 is a block diagram showing a functional configuration of a dizziness diagnostic apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a photograph of a state in which the acceleration sensor unit and the pressure plate are mounted on the pendulum according to a preferred embodiment of the present invention,
3 is a diagram illustrating a screen in which acceleration information is obtained through an acceleration sensor unit according to a preferred embodiment of the present invention.
4 is an illustration of Convex Hull for any given center-of-mass coordinate data according to a preferred embodiment of the present invention,
5 is a schematic view of the axis of the roll and pitch of the acceleration sensor unit according to the preferred embodiment of the present invention,
6 is a schematic view of the center of mass projected from the acceleration sensor unit to the floor according to a preferred embodiment of the present invention,
Figure 7 is an illustration of an Ellipse Area for any given center of mass coordinate data according to a preferred embodiment of the present invention,
8 is a schematic view showing pressure center coordinate information of a pressure plate according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

The dizziness diagnostic apparatus according to the preferred embodiment of the present invention applies accurate measurement data necessary for diagnosing dizziness by applying measurement information obtained from the acceleration sensor unit 110 or the pressure plate 140 to a Convex Hull or Ellipse Area analysis method And may include an acceleration sensor unit 110, a microcontroller 120, and a memory 130 as shown in FIG.

First, the acceleration sensor unit 110 is a sensor module that is carried or attached to the body of the subject to measure the acceleration of the body. The measured acceleration information is transmitted to the microcontroller 120 through the signal line, And is used as basic data for calculating the center-of-mass coordinates.

Here, as shown in FIG. 2, the user may hold the acceleration sensor unit 110 in a hand in a state in which the acceleration sensor unit 110 is held in close contact with a body part such as the chest or the like, and may be carried by using a mounting means such as a compression plate or an adhesive tape So that the acceleration sensor unit 110 can be attached to a necessary part of the body.

In addition, although the acceleration sensor unit 110 is illustrated only in the chest region, it is also possible to arrange the acceleration sensor unit 110 on the body part for detecting the acceleration change due to the shaking of the body, such as the head, arms, legs, have.

In addition, the acceleration sensor unit 110 can selectively use various sensors used for measuring the acceleration of the body in the technical field of the present invention. The acceleration sensor unit 110 can be easily obtained, and the Nintendo's upper remote controller (WRC, Wii Remote Controller), it is possible to reduce the construction cost of the dizziness diagnostic device.

Here, FIG. 3 shows an example of a screen in which acceleration information is acquired through the acceleration sensor unit 110 such as the upper remote controller (WRC). In FIG. 3, the target black circle represents the position of the center of mass estimated by the acceleration information of the acceleration sensor unit 110.

The microcontroller 120 is an operation unit that receives and analyzes the acceleration information of the acceleration sensor unit 110 and generates monitoring data that can be observed by an observer of a doctor or the like. The acceleration sensor unit 110 The center of gravity of the body is calculated, and the area of the extracted convex hull is extracted by extracting the Convex Hull of the calculated center-of-gravity coordinate data. Convex Hull area change graph.

Here, an example of Convex Hull for any given center-of-gravity coordinate data is shown in Fig. 4, and a small circle in the figure is the center-of-mass coordinate point of each unit over time.

Referring to FIG. 4, the microcontroller 120 extracts Convex Hull. In the extraction of the Convex Hull, all the coordinate points except for the coordinate point are arranged in a straight line And selecting a coordinate point of the condition based on the selected coordinate point is repeated to extract Convex Hull which is the minimum polygon surrounding each selected coordinate point.

In calculating the area of the convex hull, the microcontroller 120 can calculate the area of the convex hull extracted by applying Equation (1) below.

[Equation 1]

(Where Area is the area of the Convex Hull, xn is the x-axis coordinate value obtained by calculating Convex Hull, and yn is the y-axis coordinate value obtained by calculating Convex Hull)

Thus, the area of the calculated Convex Hull reflects the degree of body motion of the subject, and the observer can diagnose the dizziness symptom of the subject through the size, the degree of change, and the change rate of the area of the Convex Hull And can be used as monitoring data.

5 shows a schematic diagram of the roll and pitch axes of the acceleration sensor unit 110 such as the upper remote controller WRC. In FIG. 6, the center of the mass projected from the acceleration sensor unit 110 to the floor Is schematically illustrated.

5 and 6, in calculating the center of gravity of the body using the acceleration information of the acceleration sensor unit 110, the microcontroller 120 calculates the center of gravity of the body based on the acceleration information of the acceleration sensor unit 110 such as the upper remote controller (WRC) The center of gravity of the mass can be calculated using the following equation (2) using the concept of the center of mass projected from the measured acceleration information to the bottom, have.

&Quot; (2) "

,

,

,

,

,

,

Where A is the Euclidean size of the acceleration value of each of the three axes, ax is the x axis acceleration, ay is the y axis acceleration, az is the z axis acceleration, alpha is the angle between A and x axes, Where d is the center of mass projected in the plane, dz is the height from the bottom, dx is the center of mass in the X axis, and dy is the center of mass in the Y axis)

That is, given a height dz spaced from the floor of the acceleration sensor unit 110, the mass centers dx and dy can be estimated by substituting? And? Calculated from the acceleration sensor unit 110 into Equation (2) have.

The memory 130 is a data storage medium for receiving and storing the area change graph of the Convex Hull generated through the microcontroller 120. The memory 130 may be a secure digital (SD) memory card, an extreme digital (XD) Or a hard disk used in a general PC or a notebook computer.

In addition, the dizziness diagnostic apparatus according to the preferred embodiment of the present invention may include a display 150 for displaying an area change graph of the Convex Hull stored in the memory 130 on a screen window as shown in FIG. The observer observes the area change graph of the Convex Hull through the display 150 to visually diagnose the symptom of dizziness of the subject.

Here, the reference area change graph data of Convex Hull for a normal person or a corresponding person is stored in the memory 130, and the display 150 displays the reference area change graph of the newly calculated Convex Hull and the reference area change By displaying the graph simultaneously, it is possible to more intuitively observe dizziness symptoms of the subject.

Meanwhile, the dizziness diagnostic apparatus according to the preferred embodiment of the present invention may further provide other monitoring data to which the Ellipse Area analysis method is applied, in addition to the monitoring data according to the reference area change graph of the Convex Hull.

For this, the microcontroller 120 receives the acceleration information measured by the acceleration sensor unit 110, calculates the center-of-mass coordinates of the body, calculates the calculated Ellipse Area of each center-of-mass coordinate data, The memory 130 generates an area change graph of the Ellipse Area with respect to the center of mass and the memory 130 operates to store the area change graph of the Ellipse Area generated by the microcontroller 120. [

Here, an example of an Ellipse Area for any given center-of-gravity coordinate data is shown in Fig. 7, and a small circle in the figure is a center-of-gravity coordinate point of each unit over time.

7, in calculating the area of the Ellipse Area, the microcontroller 120 calculates an Ellipse Area estimated using only 95% of data based on the distribution of the center-of-gravity coordinates data, The Ellipse Area is calculated using Equation (3).

&Quot; (3) "

(Where a is the major axis radius of the ellipse and b is the minor axis radius)

Thus, the area of the calculated Ellipse Area reflects the degree of body motion of the subject, and the observer can diagnose dizziness symptoms of the subject through the size of the Ellipse Area, the degree of change, and the change rate state And can be used as monitoring data.

In addition, by observing the area change graph of the Convex Hull area with respect to the center of mass of the body described above and observing the area change graph of the Ellipse Area, it is possible to diagnose dizziness more accurately by estimating the organic relation by compensating the measured value of each data .

On the other hand, when the posture is changed normally, not only the center of mass of the body but also the pressure center at which the body presses the floor is also changed. Accordingly, the dizziness diagnostic apparatus according to the preferred embodiment of the present invention can be provided to provide monitoring data on the pressure center of the body.

To this end, the dizziness diagnostic apparatus according to the preferred embodiment of the present invention is formed as a horizontally arranged plate shape as shown in Figs. 1 and 2, and a plurality of pressure sensors are dispersedly arranged, And a pressure plate 140 installed to measure pressure according to the pressure.

The microcontroller 120 receives the pressure information measured through the pressure plate 140 in the same manner as the above-described processing of the acceleration information, calculates the pressure center coordinates of the body, The area of the Convex Hull is calculated by extracting the Convex Hull of the body.

In addition, the memory 130 stores an area change graph of the Convex Hull generated from the microcontroller 120.

Here, the method of extracting the convex hull with respect to the pressure center through the microcontroller 120 and calculating the area is performed by comparing the acceleration sensor unit 110 with the method of extracting the Convex Hull with respect to the center of mass and calculating the area, The pressure information of the pressure plate 140 is used instead of the acceleration information of the pressure plate 140. The detailed extraction and calculation schemes are the same, and a duplicate description will be omitted.

The pressure plate 140 can selectively use various pressure sensors used for pressure measurement according to the pressure of the body in the technical field of the present invention. The pressure plate 140 can be easily obtained at a relatively low cost Nintendo's upper balance board (WBB, Wii Balance Board), it is possible to further reduce the construction cost of the dizziness diagnostic device.

3 shows an example of a screen in which pressure information is obtained through the pressure plate 140 such as the upper balance board WBB together with the position of the center of mass by the acceleration sensor unit 110. [ In FIG. 3, the target white circle represents the position of the pressure center obtained by the pressure information of the pressure plate 140.

8, pressure center coordinate information of the upper balance board WBB is disclosed. 8, in calculating the pressure center coordinates of the body using the pressure information of the pressure plate 140, the microcontroller 120 calculates the center of pressure of the body using four pressure sensors 140 measured from the pressure plate 140 such as the upper balance board WBB From the pressure information, the following formula (4) can be applied to calculate the pressure center coordinates.

&Quot; (4) "

(CoPx is the pressure center of the X axis, CoPy is the pressure center of the Y axis, CoPxy is the Euclidian size of the pressure center, Fxo, Fxy, F00 and Foy are the pressures from the pressure sensors disposed at the respective corners of the pressure plate 140 Respectively)

Meanwhile, the dizziness diagnostic apparatus according to the preferred embodiment of the present invention may further provide other monitoring data to which the Ellipse Area analysis is applied for the mass center, in addition to the area change graph of the Convex Hull using the pressure center coordinate data.

To this end, the microcontroller 120 receives the pressure information measured through the pressure plate 140, calculates the pressure center coordinates of the body, calculates an Ellipse Area of each of the calculated pressure center coordinate data, The memory 130 generates an area change graph of the Ellipse Area according to time with respect to the center, and the memory 130 operates to store the area change graph of the Ellipse Area generated through the microcontroller 120.

The method of calculating the Ellipse Area with respect to the pressure center through the microcontroller 120 differs from the method of calculating the Ellipse Area with respect to the center of mass described above in that the pressure information is used instead of the acceleration information Since the specific calculation methods are the same, a duplicate description will be omitted.

The measured data can be used as a monitoring data for the diagnosis of dizziness symptom of the subject through the size of the area of the Convex Hull with respect to the calculated pressure center of the body, the size of the area of the Ellipse Area, the degree of change, And the subject observes the area change graph of the Convex Hull and Ellipse Area with respect to the pressure center of the body together with the area change graph of the Convex Hull and Ellipse Area according to the time to the center of mass of the body mentioned above, And thus it is possible to diagnose dizziness more precisely.

In the above description, the acceleration sensor unit 110 and the pressure plate 140 are simultaneously used to receive the monitoring data according to each of the convex hull and the ellipse area with respect to the center of mass and the pressure center of the body. However, the present invention is not limited thereto The dizziness diagnostic apparatus according to the preferred embodiment of the present invention can provide only a graph of the area change of Convex Hull with respect to the center of mass of the body alone using only the acceleration sensor unit 110, 110) alone, it is possible to provide only the graph of the area change of the Ellipse Area over time with respect to the center of mass of the body, and it is also possible to provide only the graph of the area of the Convex Hull Only an area change graph or only an area change graph of the Ellipse Area according to time with respect to the pressure center of the body alone .

Meanwhile, the microcontroller 120 according to the preferred embodiment of the present invention calculates the center-of-mass movement distance between the calculated center-of-mass coordinate data to generate a graph of the center-of-mass movement change with time, Lt; RTI ID = 0.0 > a < / RTI > Also, it is possible to calculate the pressure center shift distance between the calculated pressure center coordinate data, and to generate and store the pressure center shift change graph over time.

Here, the movement distance of the center of mass or the distance of movement of the pressure center can be calculated by separating the X-axis and the Y-axis, respectively, by the moving distance of the pressure center and the center of mass with respect to time.

In addition to the movement distance data of the center of mass or the center of pressure, it may also be operated to generate and store the center change rate graph by calculating the center change rate of the center of mass and the center of pressure.

The accuracy of the diagnosis can be further increased by using data such as the center of mass, the shift of the center of pressure, and the rate of change of the center as additional monitoring data necessary for diagnosing dizziness of the subject.

The configuration and function of the dizziness diagnostic apparatus according to the preferred embodiment of the present invention can be applied to the measurement obtained from the acceleration sensor unit 110 or the pressure plate 140 in order to compensate for limitations in diagnosing dizziness in daily life By applying and processing the information to the Convex Hull or Ellipse Area analysis method, precise monitoring data needed to diagnose dizziness is generated and provided, so that observers such as doctors can observe it to determine whether dizziness or dizziness occurs accidentally in daily life Can be accurately diagnosed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various modifications and changes may be made without departing from the scope of the appended claims.

110 ... acceleration sensor unit 120 ... microcontroller
130 ... memory 140 ... pressure plate
150 ... display

Claims (11)

An acceleration sensor unit 110 carried or attached to the body of the subject to measure the acceleration of the body;
Calculates the center-of-mass coordinates of the body based on the acceleration information measured through the acceleration sensor unit 110, calculates the area of the extracted Convex Hull by extracting the Convex Hull of the calculated center-of-mass coordinate data, A microcontroller 120 for generating a graph of the area change of the Convex Hull with respect to the center of mass of the sample; And
And a memory (130) for storing an area change graph of the generated Convex Hull,
The microcontroller (120)
A coordinate point of a condition that all the coordinate points except for the corresponding coordinate point can be placed on a straight line based on any one coordinate point arranged at the outermost one of the respective center-of-mass coordinate data is selected, and based on the selected coordinate point, The Convex Hull which is the minimum polygon surrounding each selected coordinate point is extracted,
Wherein the area of the Convex Hull extracted by applying the following equation (1) is calculated.
[Equation 1]

(Where Area is the area of the Convex Hull, xn is the x-axis coordinate value obtained by calculating Convex Hull, and yn is the y-axis coordinate value obtained by calculating Convex Hull)
delete The method according to claim 1,
The acceleration sensor unit 110 is a WRC (Wii Remote Controller) of Nintendo Co.,
The microcontroller 120 defines the roll and pitch axes of the upper remote controller WRC and calculates the center of gravity of the upper remote controller WRC using the following equation 2] to calculate the center of mass coordinates.
&Quot; (2) "

,

,

,

Where A is the Euclidean size of the acceleration value of each of the three axes, ax is the x axis acceleration, ay is the y axis acceleration, az is the z axis acceleration, alpha is the angle between A and x axes, Where d is the center of mass projected in the plane, dz is the height from the bottom, dx is the center of mass in the X axis, and dy is the center of mass in the Y axis)
The method according to claim 1,
The microcontroller 120 receives the acceleration information measured by the acceleration sensor unit 110, calculates the center-of-mass coordinates of the body, calculates an Ellipse Area of the calculated center-of-mass coordinate data, Generates an area change graph of the Ellipse Area over time for the center,
Wherein the memory (130) stores an area change graph of the generated Ellipse Area.
5. The method of claim 4,
The microcontroller (120)
Calculating the Ellipse Area using only the data including 95% based on the distribution of the center-of-mass coordinate data, and calculating the Ellipse Area using Equation (3).
&Quot; (3) "

(Where a is the major axis radius of the ellipse and b is the minor axis radius)
The method according to claim 1,
And a pressure plate (140) formed in a horizontally arranged plate shape and dispersedly arranged with a plurality of pressure sensors, the pressure plate (140) being installed so as to touch the soles of the feet and measuring pressure according to pressure,
The microcontroller 120 receives the pressure information measured through the pressure plate 140, calculates the pressure center coordinates of the body, extracts the Convex Hull of the calculated pressure center coordinate data, Calculate the area, generate a graph of the area change of the Convex Hull with respect to the time of the pressure center of the body,
Wherein the memory (130) stores a graph of the area change of the generated Convex Hull.
The method according to claim 6,
The microcontroller 120 calculates pressure center coordinates of the body by receiving the pressure information measured through the pressure plate 140, calculates an Ellipse Area of each of the calculated pressure center coordinate data, The area change graph of the Ellipse Area according to the time is generated,
Wherein the memory (130) stores an area change graph of the generated Ellipse Area.
The method according to claim 6,
The pressure plate 140 is a WBB (Wii Balance Board) manufactured by Nintendo Co.,
Wherein the microcontroller (120) calculates the pressure center coordinates by applying Equation (4) from the four pressure information measured from the upper balance board (WBB).
&Quot; (4) "

(CoPx is the pressure center of the X axis, CoPy is the pressure center of the Y axis, CoPxy is the Euclidian size of the pressure center, Fxo, Fxy, F00 and Foy are the pressures from the pressure sensors disposed at the respective corners of the pressure plate 140 Respectively)
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