KR101702462B1 - Device and method for measuring body posture - Google Patents

Abstract

A body balance measuring apparatus and a measuring method are disclosed. According to the apparatus for measuring and measuring a balance of a body according to the present invention, a sensing unit for sensing a three-axis acceleration signal in the X axis, a Y axis, and a Z axis and a triaxial gyro signal attached to the left and right shoes or feet of a pedestrian according to the movement of a pedestrian, A support time calculating unit for calculating a left foot support time and a right foot support time from the three-axis acceleration signal and the three-axis gyro signal of the whole cycle sensed by the sensing unit, And a balance determining unit for determining a difference between the left and right balances of the body by calculating the difference between the supporting time and the right foot supporting time. According to the present invention, the balance difference can be objectively expressed using the left and right support times of the body.

Description

TECHNICAL FIELD [0001] The present invention relates to a device for measuring a physical condition,

The present invention relates to a body condition measuring apparatus and a measuring method for measuring a body condition including a walking balance by using a walking information to determine a unit stride of a pedestrian and using the walking as a reference point.

In many cases, the balance between the left foot and the right foot does not match due to the habit or disease of the pedestrian when the pedestrian is walking.

As this balance is destroyed, it can cause pain like a back disk or various muscular pain. In addition, such pain can be alleviated sufficiently by paying attention to maintain correct posture in daily life.

However, it is very difficult to pay attention to maintain the correct attitude in the modern society where the life pattern is complicated, and there is a problem that it is difficult to acquire basic information about correct posture or to set a proper posture standard suited to his / her body shape.

In order to determine the balance between the left foot and the right foot, each foot should be in the same state, that is, by determining the unit stride and comparing the states in each unit stride cycle.

However, there are many difficulties in determining the unit stride of the left foot and the right foot, and there is a problem that it is impossible to judge such a unit stride and match the state of other body parts of the pedestrian based on this.

For example, in order to judge the left-right balance, it is necessary to judge the time when the feet are in the same state, such as judging the time when the feet contact the floor or judging the time when the feet are floating in the air. I can not judge the balance.

Also, in the absence of a reference point, it is impossible to judge information such as the state of the other parts of the pedestrian, that is, the state of the pelvis in a state where the right foot touches the ground, and the state of the shoulders.

That is, in a state in which there is no reference point, the individual states are not judged only on their own, and they can not confirm information that is organically combined.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system capable of easily determining a pedestrian's foot width when a pedestrian is walking and judging a pedestrian's pedestrian width as a reference point when determining the overall state and balance of the pedestrian's body, A method is provided.

According to an aspect of the present invention, there is provided a method for detecting a three-axis acceleration signal and a three-axis gyro signal in an X-axis, a Y-axis, and a Z-axis in accordance with a movement of a pedestrian attached to left and right shoes or feet of a pedestrian, A sensing unit for sensing the first and third lowest peak points of the left or right Y-axis gyro signal of the entire cycle sensed by the sensing unit and the first and third peak points of the Z-axis acceleration signal to a Toe-off point Defining a second minimum peak point of the left or right Y-axis gyro signal as a Heel strike point and determining a section from a first Toe-off point to a second Toe-off point as a unit step width section, And a support time calculating unit for calculating the left foot support time and the right foot support time of the pedestrian using the unit stride determined by the unit stride width calculating unit and each point, All.

The support time calculating unit determines the time from the first left Toe-off point to the first heel strike point as the right foot support time, and the time from the first right Toe-off point to the first heel strike point as the left foot support time And the cycle between the right foot support time and the left foot support time may be determined as a bipod support time.

The body balance measuring apparatus may further include a balance determining unit for calculating a difference between the left foot support time and the right foot support time calculated by the support time calculating unit and determining a difference between the left and right balances of the body.

The body balance measuring apparatus may further include an accumulation balance determining unit for accumulating the balance difference for the entire cycle, and for determining the difference between the time when the cumulative value exceeds the second threshold value and the cumulative balance difference.

The body balance measuring apparatus may further include a monitoring unit for outputting the notification of the excess of the first threshold value visually, audibly, and tactually when the left-right balance difference determined by the balance determining unit exceeds the first threshold value .

The support time calculating unit calculates the left foot support time and the right foot support time of each body part using the three-axis acceleration signal and the three-axis gyro signal sensed further from at least one of the left, right, back, pelvis, shoulder and head of the pedestrian , And the balance determining unit can determine the left and right balance of the body by further utilizing the difference between the left foot supporting time and the right foot supporting time of each body part.

The balance determining unit may determine left and right balances of the body by assigning different weights to the difference between the left foot supporting time and the right foot supporting time depending on the parts of the body.

The sensing unit can further sense at least one of the X-axis, Y-axis, and Z-axis three-axis acceleration signals and three-axis gyro signals of the left, right, back, pelvis, shoulder, and head of the pedestrian.

According to another aspect of the present invention, in a body balance measuring apparatus, a three-axis acceleration signal and a three-axis gyro signal, which are attached to a left or right foot or foot of a pedestrian and are X-, Y-, and Z- Axis, the first and third lowest peak points of the left or right Y-axis gyro signal of the detected whole cycle and the first and third peak points of the Z-axis acceleration signal are defined as Toe-off points, Determining a second minimum peak point of the left or right Y axis gyro signal as a Heel strike point and determining a section from a first Toe-off point to a second Toe-off point as a unit step width segment, And calculating a left foot support time and a right foot support time from the three-axis acceleration signal and the three-axis gyro signal of the three-axis acceleration signal and the three-axis acceleration signal, respectively.

The body balance measuring method may further include a step of calculating a difference between the left and right balance of the body by calculating a difference between the calculated left foot supporting time and the right foot supporting time.

The step of determining the difference between the left and right balances of the body may accumulate the balance difference for the whole cycle and determine the difference between the time when the cumulative value exceeds the second threshold and the cumulative balance difference.

The step of calculating the left foot support time and the right foot support time may include calculating the left foot support time and the right foot support time based on the three-axis acceleration signal and the three-axis gyro signal further sensed from at least one of the left, right, The step of calculating the foot support time and the right foot support time and determining the difference of the left and right balance of the body may determine the balance of the body by further utilizing the difference between the left foot support time and the right foot support time of each body part .

The step of sensing the three-axis acceleration signal and the three-axis gyro signal further detects the three-axis acceleration signal and the three-axis gyro signal of at least one of the X, Y, and Z axes of the left, right, back, pelvis, shoulder and head of the pedestrian .

The body balance measuring method may further include outputting the notification of the excess of the first threshold value in a visual, audible, and tactile manner when the determined left-right balance difference exceeds the first threshold value.

Effects of the body balance measuring apparatus and measuring method according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, it is possible to calculate a unit stride that clearly forms one period when walking a pedestrian.

In addition, it is possible to judge the balance of the left and right feet based on this, or judge the physical condition or posture such as the pelvis or the shoulder by organically combining with other overall parts, for example.

1 is a schematic block diagram of a body balance measuring apparatus according to the present invention.
2 to 4 are views for explaining a method of measuring balance in a body balance measuring apparatus according to the present invention.
5 to 7 are schematic flow charts of a body balance measurement method related to the present invention.
8 is a use state diagram of a body balance measuring apparatus according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments related to a body balance measuring apparatus and a measuring method constructed as above will be described with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

FIG. 1 is a schematic configuration diagram of a physical condition measuring apparatus related to the present invention, and FIGS. 2 to 4 are views for explaining a method of measuring a physical condition in a physical condition measuring apparatus related to the present invention.

Referring to FIG. 1, the physical condition measuring apparatus 100 may include a sensing unit 110, a unitary stride computing unit 120, and a supporting time calculating unit 130. The physical condition measuring apparatus 100 may further include a balance determining unit 140, a monitoring unit 150, or an accumulated balance determining unit 160.

Specifically, the sensing unit 110 is attached to the left and right shoes or feet of the pedestrian, and can sense the three-axis acceleration signals of the X axis, the Y axis, and the Z axis and the triaxial gyro signals according to the movement of the pedestrian.

The sensing unit 110 includes at least one sensor attached to a foot of a shoe or a pedestrian, and can sense an acceleration signal and a gyro signal according to the motion of the pedestrian. Preferably, the plurality of sensors may be embedded in the lower surface of the footwear of the pedestrian, and the sensing signal may be transmitted to other components by sensing the movement of the pedestrian.

The sensing unit 110 is attached to at least one of the left and right waist, pelvis, shoulder, and head of the pedestrian, and detects at least one X-axis, Y-axis, and Z- And three-axis gyro signals.

The unit bandwidth calculator 120 calculates the unit bandwidth of the Z axis acceleration signal based on the first and third lowest peak points of the left or right Y axis gyro signals of the whole cycle sensed by the sensing unit 110 and the first and third highest peak points of the Z axis acceleration signal Point is defined as a Toe-off point, and a second lowest peak point of the left or right Y-axis gyro signal is defined as a Heel strike point, and the section from the first Toe-off point to the second Toe- .

As a result, the unit stride signal calculating unit 120 may divide the whole cycle into unit stride units and calculate the detected 3-axis acceleration signal and 3-axis gyro signal for each unit stride.

The thus measured unit stride becomes a reference point for judging the balance of the feet and the state of other parts of the body when walking on the pedestrian, and thus the state of the pedestrian can be accurately grasped.

That is, it is possible to clearly extract the period of the unit stride, and based on this, when the foot is in a certain state, it is possible to accurately determine the state of the other body part or the balance of both feet.

In the case where the cycle of the unit stride can not be extracted, even if the sensor is installed in another body part, the signals detected from the sensor can only have different meanings, and can be combined organically with other body parts, Could not be derived.

The support time calculating unit 130 may calculate the left foot support time and the right foot support time in the three-axis acceleration signal and the three-axis gyro signal of the whole cycle sensed by the sensing unit 110, respectively.

The support time calculating unit 130 calculates the support time of each of the body parts using the three-axis acceleration signal and the three-axis gyro signal sensed from at least one of the left, right, back, Can be calculated.

The balance determining unit 140 may determine the difference between the left and right balances of the body by calculating the difference between the left foot support time and the right foot support time calculated by the support time calculator 130. [ At this time, the difference between the left and right balance of the body can be expressed by the value based on the difference of the support time.

The balance determining unit 140 can determine the left and right balance of the body by further using the difference between the left foot supporting time and the right foot supporting time of each body part. For example, when the left foot supporting time is 20 seconds and the right foot supporting time is 18 seconds, the balance determining unit 140 can determine that the left and right balance of the body is different by two seconds. In other words, it can be judged that 2 seconds / (20 seconds + 18 seconds) = 5 points the left side of the center.

Balance Determination Unit 140 The right and left balance of the body can be determined by giving different weights to the difference between the left foot support time and the right foot support time according to each part of the body.

The monitoring unit 150 may output visual notification, auditory alarm, and tactual warning of the excess of the first threshold value when the left-right balance difference determined by the balance determining unit 140 exceeds the first threshold value. The monitoring unit 150 may include a display module, an output module, and a haptic module.

The cumulative balance determining unit 160 may accumulate and calculate the balance difference for the entire cycle, and may determine the difference between the time when the cumulative calculated value exceeds the second threshold value and the cumulative balance difference.

2 to 3, the sensing unit senses the three-axis acceleration signal, the three-axis gyro signals ll to l6 and the three-axis acceleration signal and the three-axis gyro signals m1 to m6 at the left foot, respectively .

Although only the acceleration signal and the gyro signal of the unit stride width are shown in the above figure, the continuous acceleration signal and the gyro signal can be detected as the walking continues.

Referring to FIG. 4, the support time calculator can calculate the support times of the left and right feet using the Y-axis gyro signal and the Z-axis acceleration signal.

Specifically, the support time calculating section defines the first and third lowest peak points of the left or right Z-axis gyro signal and the first and third peak points of the Z-axis acceleration signal as a Toe-off point, The second lowest peak point of the Y-axis gyro signal is defined as the Heel strike point, the time from the first left Toe-off point to the first heel strike point is determined as the right foot support time, and the right first toe- The time to the first heel strike point can be determined as the left foot support time. At this time, the support time calculating unit may determine the period from the first heel strike point to the first toe-off point, and the period from the second heel strike point to the second toe-off point as the bipod support time.

The support time calculating unit may calculate the time (e.g., Left single stance or Right single stance) supported by each foot on one side of the foot and determine the balance difference using the difference.

The support time calculator can calculate the left foot support time and the right foot support time of each body part using the three-axis acceleration signal and the three-axis gyro signal detected from at least one of the left, right, back, pelvis, shoulder and head of the pedestrian have.

5 to 7 are schematic flow charts of a method of measuring a physical condition related to the present invention.

Referring to FIG. 5, the body condition measuring method of the physical condition measuring apparatus is attached to the left and right shoes or feet of the pedestrian and detects three axis acceleration signals and three axis gyro signals of X axis, Y axis and Z axis according to the movement of the pedestrian (S510).

At this time, the three-axis acceleration signal and the three-axis gyro signal of at least one of the X, Y, and Z axes of the left, right, back, pelvis, shoulder, and head of the pedestrian can be further sensed.

Next, the body balance measuring method can calculate the left foot support time and the right foot support time in the sensed three-axis acceleration signal and the three-axis gyro signal, respectively (S520).

The step S520 of calculating the left foot support time and the right foot support time may be performed by using the three-axis acceleration signal and the three-axis gyro signal, which are further sensed from at least one of the left and right waist of the pedestrian, the pelvis, the shoulder, The left foot support time and the right foot support time of the part can be calculated.

Finally, the body condition measuring method may calculate the difference between the left and right balances of the body by calculating the difference between the calculated left foot supporting time and the right foot supporting time (S530).

In step S530 of determining the difference between the left and right balances of the body, the left and right balances of the body can be determined by further using the difference between the left foot support time and the right foot support time of each body part. In addition, it is possible to determine the left-right balance of the body by assigning priority or weight to the difference between the left-foot support time and the right-foot support time of each body part.

Specifically, a lower weight can be gradually given from the foot to the head. For example, a weight "1" is given to the difference between the left and right foot support times measured on both feet, a weight "0.8" is assigned to the difference between the left and right foot support times measured on the left and right pelvis, The weight difference "0.7" is assigned to the difference in the support time of the foot, and the weight "0.3" is assigned to the difference in the support time between the left and right feet measured on the left and right shoulders, respectively.

Referring to FIG. 6, when the determined left and right balance difference exceeds the first threshold value, the body condition measuring method may output the excessive notification of the first threshold value visually, audibly, and tactually (S540) .

Referring to FIG. 7, in step S530 of determining the difference between the left and right balances of the body, a unit balance difference is calculated for all the cycles (S532), and the cumulative calculated value is calculated as a second threshold And the cumulative balance difference may be determined (S534).

8 is a use state diagram of a physical condition measuring apparatus related to the present invention.

Referring to FIG. 8, the physical condition measuring device can be used as a rehabilitation exercise monitoring device.

Specifically, a body posture measuring device 100 is attached to one side of a fitness device for gait rehabilitation exercise, and a sensor is attached to a foot or foot of a pedestrian, and a three-axis acceleration signal and a three-axis gyro signal So that the balance difference of the pedestrian can be displayed on the display unit.

In addition, when the balance difference of the pedestrian increases by more than the set threshold value, a warning sound is output to correct the walking method, and the target exercise time and current fatigue information can be provided through the display unit.

Therefore, according to the present invention, it is possible to objectively display a body part having a large balance difference and a balance difference according to the walking habits of a pedestrian, and to determine or display the state of another body part with reference to a unit step width, And can be used for medical instruments and the like.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: physical condition measuring device 110: sensing part
130: support time calculating unit 140: balance determining unit
150: monitoring unit 160: cumulative balance determining unit

Claims (15)

A sensing unit attached to the left and right shoes or feet of a pedestrian and sensing a three-axis acceleration signal and a three-axis gyro signal in the X-axis, the Y-axis, and the Z-axis in accordance with the movement of the pedestrian;
The first and third lowest peak points of the left or right Y-axis gyro signals of the entire cycle sensed by the sensing unit and the first and third peak points of the Z-axis acceleration signal are defined as Toe-off points, Defining a second minimum peak point of the left or right Y-axis gyro signal as a Heel strike point and determining a section from a first Toe-off point to a second Toe-off point as a unit step width section;
A support time calculator for calculating the left foot support time and the right foot support time of the pedestrian using the unit stride width and the respective points determined by the unit stride calculation unit; And
And a balance determining unit for determining a difference between the left and right balances of the body by calculating a difference between the left foot supporting time and the right foot supporting time calculated by the supporting time calculating unit,
The support time calculating unit calculates the support time of the left foot and the support time of the right foot of each body part using the three-axis acceleration signal and the three-axis gyro signal sensed from at least one of the left, right and left waist of the pedestrian, Respectively,
Wherein the balance determining unit determines the balance between the left and right sides of the body by further using the difference between the left foot support time and the right foot support time of each of the body parts and determines the balance between the left foot support time and the right foot support time And the left and right balances of the body are determined by giving different weights to the differences.
delete The method according to claim 1,
The support time calculating unit calculates,
The time from the first toe-off point of the left foot to the first heel strike point is determined as the right foot support time, the time from the first toe-off point of the right foot to the first heel strike point is determined as the left foot support time, And a cycle between the right foot supporting time and the left foot supporting time is determined as a leg support time.
delete The method according to claim 1,
And an accumulation balance determining unit for accumulating the balance differences for the entire cycle and determining an accumulation balance difference between a time when the value calculated by accumulating the balance difference exceeds a second threshold value and a cumulative balance difference A body condition measuring device.
The method according to claim 1,
A monitoring unit for visually, audibly, and tactually outputting an excess notification of the first threshold value when the left-right balance difference determined by the balance determining unit exceeds a first threshold value;
Further comprising: a body position measuring device for measuring a body position of the user.
delete delete delete Sensing a three-axis acceleration signal and a three-axis gyro signal of an X-axis, a Y-axis, and a Z-axis in accordance with the movement of a pedestrian attached to the left and right shoes or feet of a pedestrian in a body balance measuring apparatus;
The first and third lowest peak points of the left or right Y-axis gyro signals of the detected whole cycle and the first and third peak points of the Z-axis acceleration signal are defined as Toe-off points, Determining a second minimum peak point of the right Y-axis gyro signal as a Heel strike point and determining a section from a first Toe-off point to a second Toe-off point as a unit step width;
Calculating a left foot support time and a right foot support time from the three-axis acceleration signal and the three-axis gyro signal of the detected whole cycle; And
Calculating a difference between the calculated left foot support time and the right foot support time to determine a left / right balance difference of the body,
Wherein the step of calculating the left foot support time and the right foot support time comprises:
The left foot support time and the right foot support time of each body part are calculated using the three-axis acceleration signal and the three-axis gyro signal further sensed from at least one of the left, right, back, pelvis, shoulder and head of the pedestrian,
Wherein the step of determining the left-
The left and right balance of the body is determined by further using the difference between the left foot support time and the right foot support time of each of the body parts, and the weight difference between the left foot support time and the right foot support time, To determine the left-right balance of the body.
delete 11. The method of claim 10,
Wherein the step of determining the left-
Accumulating the balance differences for the whole cycle, and determining a difference between a time point at which the value calculated by accumulating the balance difference exceeds a second threshold value and an accumulated balance difference.
delete delete 11. The method of claim 10,
Further comprising the step of visually, audibly, and tactually outputting the excess notification of the first threshold value when the determined left-right balance difference exceeds the first threshold value.

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