KR102155911B1 - Body composition analyzer having correction function against imbalance of measurement posture - Google Patents

Abstract

The present invention relates to a footrest-type body composition analysis device capable of analyzing body composition by measuring a living body impedance through a current applied to the sole while standing in an upright position.
In order to implement this, the body composition analysis device having a function of correcting body imbalance according to the present invention detects a plurality of loads carried by the left and right feet by arranging a key matrix type decompression sensor at the center of both soles. The body composition is measured by dividing into regions and measuring the order of the amount of decompression detected in each sensing region, and reflecting the measured body composition value by referring to the previously stored correction table corresponding to the order of the decompression size of the sensing region. It is constructed to correct measurement errors due to unbalanced balance.

Description

Body composition analysis device with correction function for body imbalance {BODY COMPOSITION ANALYZER HAVING CORRECTION FUNCTION AGAINST IMBALANCE OF MEASUREMENT POSTURE}

The present invention relates to a footrest-type body composition analysis device capable of analyzing body composition by measuring a living body impedance through an electric current applied to the sole of the foot while standing in an upright position, and more particularly, to a body by sensing weight distributed to both left and right feet. The present invention relates to a body composition analysis apparatus having a function of correcting a body imbalance that enables a more accurate body composition measurement by correcting a measurement error due to an imbalance in balance.

Recently, as interest in health management has increased, research on devices capable of measuring and analyzing health functions is being actively conducted.

As a kind of health function measurement and analysis device, there is a body composition analysis device. The components that make up the human body are largely divided into four categories: body moisture and body fat, and proteins and minerals. Body composition analysis equipment is various, such as underwater body density method, DEXA, skin double layer method, etc., mainly by using the difference in electrical resistance between non-fat tissue and fat tissue to send low-energy high AC waves to the human body, resulting in the ratio of fat and moisture in the human body. And the bioelectrical impedance analysis (BIA), which is a method of obtaining a quantity, is widely used because it is easy to measure, does not infringe on the human body, and is simple to measure. In the bioelectrical resistance analysis method, the human body is regarded as a combination of impedance, current is passed through the human body, and a voltage generated by the current is measured to measure the impedance of the human body from the current and voltage.

In addition, various body components are analyzed by substituting information on the body composition calculation formula with the bio-impedance measured from the subject's body and the subject's personal information, that is, the subject's height, weight, sex, and age.

The general formula for calculating body water among body composition is as follows.

Here, A, B, C, D, and E are constants according to the device characteristics of the body composition analyzer.

In general, the biological impedance, which is used as an important item for body composition analysis in a body composition analyzer, can vary greatly depending on the position at which the subject measures the impedance or the measurement posture of the subject, so it must be measured according to the posture required by the body composition analyzer.

According to the human body component analysis device disclosed in Patent Document 1, each load measurement sensor is attached to both foot positions of the subject, and the load applied to each foot is measured to measure the balance of posture, and the subject's right palm, right thumb, and Hand electrodes (3,4,5,6) for contacting the left palm and left thumb, respectively, and the development pole (7, for contacting the subject's right front sole, right rear sole, left front sole, and left rear sole, respectively) 8, 9, 10) is a technology to measure the human body component by measuring the impedance of each body part is disclosed.

Such a conventional device calculates the left and right deviation of the center of body weight over time through a load measurement sensor disposed at both foot positions of the subject, and measures the impedance of each part of the body, thereby moving the center of gravity of the body weight and Since the amount of components can only be compared at the same time, the body composition measurement value displayed as a measurement result itself still contains measurement errors for postural imbalance.

Korean Patent Publication No. 10-2001-0011583 (published on February 15, 2001)

The present invention was invented in view of the above circumstances, by disposing a key matrix-type decompression sensor at the center of both soles, dividing the load carried by the left foot and the right foot into a plurality of sensing areas, and measuring it. In addition, by determining the order of the amount of decompression detected in each sensing region, and reflecting it in the measured body composition value by referring to the previously stored correction table corresponding to the order of the decompression size of the sensing region, the measurement error due to the imbalance of the body balance is It is a technical task to provide a body composition analysis device having a correction function for body imbalance that can be corrected.

In order to solve the above problems, the body composition analysis apparatus having a correction function for body imbalance according to an embodiment of the present invention is capable of analyzing body composition by measuring a living body impedance through a current applied to the sole of the foot while standing in an upright position. An apparatus for analyzing body composition comprising: an electrode unit installed on an upper surface of the body so as to be in contact with each of the front and rear portions of the left sole and the front and rear portions of the right sole to measure the biological impedance for body composition analysis; A load detection sensor installed at the bottom of the four corners of the body to measure the weight; A decompression sensor installed to detect body balance by subdividing and measuring pressure applied to the center of the left sole and the center of the right sole from the upper surface of the body to the detection area of the quadrant; An input unit installed on one side of the body to input information on height, age, and gender as personal information of the subject required for body composition analysis; A lookup table in which correction values corresponding to the order of the decompression magnitude detected by the decompression sensor are stored in the detection area of the quadrant; Analyze the body composition of the subject by reflecting the biological impedance sensed through the electrode part, the subject's body weight sensed through the load sensing sensor, the correction value referenced in the lookup table and personal information input through the input part according to the body balance Consists of including;

In the pressure-sensitive sensor, a plurality of first detection wires are attached in a horizontal direction to one side of the pressure-sensitive film, while a plurality of second detection wires are attached in a vertical direction to the other side of the pressure-sensitive film. It is characterized in that the resistance value is changed in response to the pressure applied to the film at each intersection point where the and the second sensing wire intersect.

The correction value of the lookup table is characterized in that it is made by measuring a plurality of experimenters as samples.

The control unit obtains the average value of the decompression size of the left foot and the decompression size of the right foot detected by the decompression sensor, and then the difference α between the decompression size of the left foot and the average value, and the difference β between the decompression size of the left foot and the average value, After receiving the correction value x according to the decompression size of the quadrant sensing region and the correction value y according to the decompression size of the quadrant sensing region of the right foot, calculating the corrected impedance based on the formula αx+βy, and then adding it to the impedance measured through the electrode unit. It is characterized in that it is made to derive the impedance after correction.

A communication module for wirelessly transmitting body composition information analyzed by the control unit to an external device is connected to the output terminal of the control unit.

In the present invention described above, when the body composition is measured according to the bioelectrical resistance analysis method, when the body weights distributed to both feet are different, the impedance varies according to the difference between the distributed body weights, so that an error occurs in the body composition measurement result. There is an advantage in that a more accurate body composition index can be derived by subdividing and measuring the load distribution applied by this, and correcting the measured biological impedance by referring to the impedance correction value of a pre-set lookup table based on this.

1 is a use state diagram of a conventional human body component analysis device,
2 is a plan view and a side view of a body composition analysis apparatus according to the present invention,
Figure 3 is a state diagram of the installation of the pressure sensor according to the present invention.
4 is a block diagram of a body composition analysis apparatus according to the present invention,
5 is a diagram showing an impedance distribution diagram according to body balance.

In order to fully understand the present invention, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. This embodiment is provided to more completely describe the present invention to those with average knowledge in the art, and detailed descriptions of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted. .

2 shows a plan view and a side view of a body composition analyzer according to the present invention.

The body 10 forming the outer shape of the body composition analyzer according to the present invention is formed in a rectangular parallelepiped shape with a relatively low height.

When the subject stands on the body 10, the bio-impedance is measured for body composition analysis at the positions where the front and rear portions of the left sole of the left foot contact each other, and the positions where the front and rear portions of the right soles contact each other on the upper surface of the body 10. The electrode unit 12 for applying current and sensing voltage is installed so that it can be performed.

In addition, a load detection sensor 14 is installed at the bottom of the four corners of the body 10 to detect the weight required for body composition analysis of the subject. The load detection sensor 14 may be implemented by applying a load cell.

In particular, on the upper surface of the body 10, a decompression sensor 16 is installed at the central portion of the left sole and the central portion of the right sole. The decompression sensor 16 is installed to detect a body balance by subdividing and measuring the pressure by the weight of the subject applied through the sole of the foot into a sensing area of a quadrant.

As shown in FIG. 3, the pressure-sensitive sensor 16 has a plurality of first sensing wires 16b attached horizontally to one side of the pressure-sensitive film 16a in parallel while the pressure-sensitive film 16a A plurality of second sensing conductors 16c and 16d are attached in parallel in the vertical direction to the other side of the device. In the drawing, the first sensing conductor 16b and the second sensing conductor 16c and 16d appear to be disposed on the same plane, but the first sensing conductor 16b is attached to the bottom of the pressure-sensitive film 16a. Meanwhile, the second sensing conductors 16c and 16d are attached to the upper surface of the pressure-sensitive film 16a. Alternatively, the first sensing conductor 16b may be attached to the upper surface of the pressure-sensitive film 16a, while the second sensing conductor 16c and 16d may be configured to be attached to the lower surface of the pressure-sensitive film 16a.

The second sensing wire 16c is for measuring the decompression of the left foot, for example, the second sensing wire 16d is for measuring the decompression of the right foot, and in the illustrated example, the first sensing wire 16b is the left foot contact Although shown in a structure extending from (18a) to the right foot contact portion 18b, it may be configured by separating between the left foot contact portion 18a and the right foot contact portion 18b.

The first sensing conductor 16b and the second sensing conductor 16c, 16d may be formed of copper, for example, and the pressure-sensitive film 16a is made to change its resistance value when its thickness changes according to a change in pressure, Since the first detection wire 16b and the second detection wire 16c and 16d are orthogonal to each other in a grid shape, the pressure change is detected at the intersection between the first detection wire 16b and the second detection wire 16c and 16d. It is made to be able to do.

The pressure-sensitive sensor 16 sequentially scans the first detection wire 16b and the second detection wire 16c, 16d, and the first detection wire 16b and the second detection wire 16c, 16d. The pressure change at the intersection point is sensed. If the pressure change at all the intersection points between the first sensing conductor 16b and the second sensing conductor 16c is detected and summed, the pressure of the left foot can be measured, and the first sensing conductor ( The pressure of the right foot can be measured by detecting and adding pressure changes at all intersection points between 16b) and the second sensing conductor 16d.

In particular, the pressure-sensitive sensor 16 includes a first sensing region 16e, a second sensing region 16f, a third sensing region 16g, and a fourth sensing region in the left foot contact 18a and the right foot contact 18b. Like the sensing region 16h, it is divided into four quadrants and sensed. This is to correct the measurement error of the measured body impedance according to the degree to which the subject's body balance is skewed in any direction. Of course, it can be configured to be subdivided into more than 4 quadrants and detected, but considering the cost-effectiveness ratio, the 4 quadrant may be preferable.

4 shows a configuration diagram of the body composition analysis apparatus according to the present invention, so that each detection signal of the electrode unit 12, the load detection sensor 14, and the pressure reduction sensor 16 is input to the control unit 20 It is connected.

Another input terminal of the control unit 20 is connected to an input unit 30 through which the subject can directly manually input personal information such as height, age, and gender as information necessary for body composition analysis. The input unit 30 may be configured in the form of a keypad or a touch screen.

In particular, the control unit 20 is connected to a lookup table 40 in which a correction value corresponding to the order of the decompression magnitude sensed by the decompression sensor 16 is stored.

The look-up table 40 includes a region detected by the pressure-sensitive sensor 16 as the first sensing region 16e, the second sensing region 16f, the third sensing region 16g, and the fourth sensing region 16h. It is divided into four quadrants, and the set check table values are stored in correspondence with the order of the strongly pressed detection areas. For example, suppose that the first sensing region 16e, the second sensing region 16f, the fourth sensing region 16h, and the third sensing region 16g are pressed strongly in this order, 0.47 is stored as a corresponding correction value. , If the first sensing region 16e, the second sensing region 16f, the third sensing region 16g, and the fourth sensing region 16h are pressed strongly in this order, another correction value corresponding thereto is stored, As described above, correction values corresponding to all cases in which the sensing regions can be strongly pressed are stored.

Accordingly, the control unit 20 corrects referenced in the look-up table 40 according to the body impedance sensed through the electrode part 12, the body weight of the subject sensed through the load sensor 14, and the body balance. The body composition of the subject is analyzed by reflecting the value and personal information input through the input unit 30 and the analysis result is output.

The communication module 60 connected to the output side of the control unit 20 is a means for transmitting the results analyzed by the body composition analysis apparatus according to the present invention to an external device, and in particular, as a short-range communication means, it is configured to transmit using Bluetooth communication. May be.

The display unit 50 is a means for displaying the body composition result analyzed by the control unit so that a subject or an examiner can visually confirm the result, and the display unit 50 may be configured by being connected to the control unit 20 by wire, or the communication module ( 60) may be configured to be transmitted to the outside and displayed, and may be configured to be displayed by transmitting wired or wirelessly to a separate terminal device.

The operation of the body composition analysis apparatus having the function of correcting the body imbalance of the present invention configured as described above will be described in detail.

When measuring the biological impedance to measure the body composition using the bioelectrical resistance analysis (BIA), the measured impedance represents a different value depending on the measured posture of the subject, which affects the body fat index derived using the measured impedance.

FIG. 5 is a diagram showing an impedance distribution diagram according to body balance for four subjects, and FIGS. 5A to 5D are diagrams showing a distribution diagram of a result of measuring a living body impedance by varying the subject's measurement posture.

Here, the horizontal axis is a value representing balance, and the closer to 0, which is the center of the horizontal axis, the left and right body balance is in place, and as the center of the horizontal axis goes to the left (-1, -2, -3, -4), the body balance goes to the left. It can be seen that the measured impedance value is not uniformly displayed at this time, and the body balance is inclined to the right from the center of the horizontal axis to the right (1, 2, 3, 4). It can be seen that the values are not uniformly displayed. That is, as the body balance collapses, the body impedance changes and an accurate value cannot be derived. Therefore, the measured impedance according to the body balance needs to be corrected so that a more accurate body composition can be analyzed.

Meanwhile, in FIG. 5, the vertical axis represents the impedance value measured using the bioelectrical resistance analysis (BIA). When the balance value is located between -1 and 1, it can be seen that the body balance is relatively balanced. The measured impedance value of 690 to 710 can be viewed as a normal impedance.

Hereinafter, a method for correcting impedance according to body balance will be described.

According to the present invention, the impedance after correction reflecting the impedance error due to the imbalance of the body balance becomes the impedance obtained by summing the measured impedance measured through the electrode unit 12 and the preset correction impedance.

The correction impedance may be expressed as αx+βy.

Here, α is the decompression size of the sum of all decompression by the left foot, and β is the decompression size of the sum of decompression by the right foot.

The α is calculated by summing the decompression values of the decompression sensor 16 detected at all intersections of the first sensing region 16e to the fourth sensing region 16h located in the left foot contact part 18a, and β is the right It is calculated by summing the decompression values of the decompression sensor 16 sensed at all intersections of the first to fourth sensing regions 16e to 16h located on the foot contact portion 18b.

x and y are correction values referenced in the look-up table 40, respectively, and as described above, the regions detected by the pressure-sensitive sensor 16 are the first sensing region 16e, the second sensing region 16f, and the third It is subdivided into four quadrants, such as the sensing region 16g and the fourth sensing region 16h, and is a check table value set in correspondence with the order of the strongly pressed sensing regions, corresponding to all cases that can be strongly pressed against the sensing regions. This is the correction value. These corrections can be made to give confidence in statistics, for example, by measuring samples of a large number of subjects of 100 or more.

In this way, a more accurate impedance is measured by reflecting the error according to the change in the body balance of the subject, and the measured impedance is separately measured along with the weight measured by the load sensor 14 and the subject personal information input through the input unit 30. When responding to a widely known body composition analysis formula such as the above-described body moisture formula, the controller 20 can more accurately analyze the body composition.

In addition, the body composition information analyzed by the controller 20 may be transmitted to the display unit 50 and displayed, or may be wirelessly transmitted to a separate terminal through the communication module 60 and displayed.

10 - body, 12 - electrode,
14 - load detection sensor, 16 - pressure reduction sensor,
16a-pressure-sensitive film, 16b-first sensing wire,
16c,16d - 2nd sensing wire, 16e~16h - sensing area,
18a-left foot contact, 18b-right foot contact,
20 - control, 30 - input,
40-lookup table, 50-display,
60 - Communication module.

Claims (5)

In a body composition analysis device capable of analyzing body composition by measuring a living body impedance through a current applied to the sole of the foot while standing in an upright position,
Electrodes installed on the upper surface of the body so as to contact each of the front and rear portions of the left sole and the front and rear portions of the right sole to measure the biological impedance for body composition analysis;
A load detection sensor installed at the bottom of the four corners of the body to measure the weight;
A decompression sensor installed to detect body balance by subdividing and measuring pressure applied to the center of the left sole and the center of the right sole from the upper surface of the body to the detection area of the quadrant;
An input unit installed on one side of the body to input information on height, age, and gender as personal information of the subject required for body composition analysis;
A lookup table in which a correction value corresponding to an order of the decompression magnitude detected by the decompression sensor is stored in the detection area of the quadrant, the correction value being made by measuring a plurality of experimenters as samples;
Analyze the body composition of the subject by reflecting the biological impedance sensed through the electrode part, the subject's body weight sensed through the load sensor, the correction value referenced in the lookup table and personal information input through the input part according to the body balance Body composition analysis device having a correction function for the body imbalance, characterized in that consisting of;
The method of claim 1, wherein the pressure-sensitive sensor has a plurality of first sensing wires attached in a horizontal direction to one side of the pressure-sensitive film while a plurality of second sensing wires are attached in a vertical direction to the other side of the pressure-sensitive film. Thus, the body composition analysis apparatus having a correction function for the body imbalance, characterized in that the resistance value is made to change in response to the pressure applied to the film at each intersection of the first detection wire and the second detection wire crossing.
delete The method of claim 1, wherein the control unit calculates an average value of the decompression size of the left foot and the decompression size of the right foot detected by the decompression sensor, and then the difference α between the decompression size of the left foot and the average value, and the decompression size and the average value of the left foot. After receiving the difference β, the correction value x according to the decompression size of the quadrant sensing region of the left foot, and the correction value y according to the decompression size of the quadrant sensing region of the right foot, calculate the corrected impedance based on the equation αx+βy, and then through the electrode unit. Body composition analysis apparatus having a correction function for the body imbalance, characterized in that made to derive the impedance after correction by summing the measured impedance.
The apparatus of claim 1, wherein a communication module for wirelessly transmitting body composition information analyzed by the control unit to an external device is connected to the output terminal of the control unit.

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