KR20200069402A - Body composition analyzer having correction function against imbalance of measurement posture - Google Patents

Abstract

The present invention relates to a foodhold type body composition analysis device capable of analyzing body composition by measuring bioimpedance through currents applied to soles of a user standing in an upright posture. To implement this, the body composition analysis device having function of correcting imbalance of body according to the present invention has a key matrix type decompression sensor in central parts of both soles to measure the loads applied from a left foot and a right foot by subdividing the same into a plurality of detection areas, determine the order of the decompression size detected in each detection area, and reflect the same to measured body composition values by referring to a pre-stored correction table according to the order of the decompression size of the detection area, thereby correcting measured errors due to imbalance of body balance.

Description

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

The present invention relates to a scaffold-type body composition analyzer that allows the body composition to be analyzed by measuring the bioimpedance through an electric current applied to the sole, standing in an upright position, and more specifically, detecting a body weight distributed in both right and left feet. The present invention relates to a body composition analyzer having a correction function for a body imbalance that corrects a measurement error caused by an imbalance of balance, so that a body composition can be more accurately measured.

Recently, as interest in health care increases, research on devices capable of measuring and analyzing health functions has been actively conducted.

A body composition analyzer is a type of health function measurement and analysis device. The components that make up the human body are largely divided into body moisture, body fat, and protein and minerals. Body composition analysis devices include various methods such as underwater density, DEXA, and skin-folding techniques. The ratio of fat and moisture in the human body is caused by flowing a high-energy, low-current alternating wave through the body using the difference in electrical resistance between non-fat tissue and fat tissue. And bioelectrical impedance analysis (BIA), which is a method of obtaining a quantity, is widely used because it is easy to measure, no harm to the human body, and a simple method of measurement. The bioelectrical resistance analysis method considers the human body as a combination of impedances, and flows a current through the human body, and measures the voltage by the current to measure the impedance of the human body from the current and voltage.

In addition, various body components are analyzed by substituting the body impedance calculation formula for information about the body impedance and body information measured by the body impedance of the subject and personal information of the subject, such as height, weight, sex, and age of the subject.

The general formula for calculating body moisture among body components 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 bioimpedance used as an important item in body composition analysis in the body composition analyzer can vary greatly depending on the position of the subject to measure impedance or the measurement posture of the subject, so it should be measured according to the attitude required by the body composition analyzer.

According to the human body composition analyzer disclosed in Patent Document 1, each load measurement sensor is attached to both foot positions of the subject to measure the load applied to each foot to measure posture balance, the right palm of the subject, the right thumb, Hand electrodes (3,4,5,6) for contacting the left palm and left thumb, respectively, and power generation poles (7, for contacting the subject's right forefoot, right hindfoot, left forefoot and left hindfoot, respectively) 8,9,10) to measure the impedance of each human body part to measure the human body composition.

Such a conventional device calculates the left and right deviations of the center of gravity during the measurement time according to the time and measures the impedance of each part of the body through the load measurement sensors arranged at both foot positions of the subject, thereby moving the center of gravity of the body weight and the human body for each part. Since only the component amounts can be compared at the same time, the body composition measurement value itself, which is displayed as the measurement result, still contains a measurement error for posture imbalance.

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

The present invention was devised in view of the above circumstances, and a key matrix type decompression sensor is disposed at the center of both soles to divide the load carried by the left foot and the right foot into a plurality of sensing areas, and to measure it in detail. In addition, by determining the order of the decompression size detected in each detection area, and reflecting the measured body composition value by referring to the pre-stored correction table corresponding to the decompression size order of the detection area, measurement errors due to imbalance of body balance are determined. It is a technical task to provide a body composition analyzer having a correction function for a body imbalance that can be corrected.

A body composition analyzer having a function for correcting body imbalance according to an embodiment of the present invention for solving the above-described problems, stands in an upright position and measures body impedance by measuring bioimpedance through a current applied to the sole of the foot so as to analyze the body composition. An apparatus for analyzing body composition, comprising: an electrode unit installed on an upper surface of a body to measure bioimpedance for body composition analysis in contact with the front and rear portions of the left sole and the front and rear portions of the right sole; A load sensing sensor installed on the bottom of the four corners of the body to measure weight; A decompression sensor installed to detect body balance by subdividing and measuring the pressure applied to the central part of the left sole and the central part of the right sole from the upper surface of the body into the sensing area of the quadrant; An input unit installed on one side of the body and configured to input information regarding height, age, and gender as personal information of a subject required for body composition analysis; A look-up table in which correction values corresponding to the order of the decompression size detected by the decompression sensor are stored in the sensing area of the quadrant; Analyze the body composition of the subject by reflecting the bioimpedance sensed through the electrode part, the weight of the subject sensed through the load sensor, the correction value referenced in the lookup table according to the body balance, and personal information input through the input part It includes; a control unit.

The pressure reducing sensor has a plurality of first sensing wires attached in a horizontal direction to one side of the pressure reducing film while a plurality of second sensing leads are attached in a vertical direction to the other side of the pressure reducing film, a first sensing lead. It is characterized in that the resistance value is changed to correspond to the pressure applied to the film at each intersection where the second sensing wire intersects.

The correction value of the look-up table is characterized by being made by measuring a number of experimenters as samples.

The control unit calculates the average value of the decompression size of the left foot and the decompression size of the right foot, which is sensed by the decompression sensor, and the difference between the decompression size of the left foot and the average value α and the difference between the decompression size of the left foot and the average value β, of the left foot After receiving the correction value x according to the decompression size of the quadrant detection area and the correction value y according to the decompression size of the quadrant detection area of the right foot, calculate the correction impedance according to the formula αx+βy and add it to the impedance measured through the electrode part. 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 an output terminal of the control unit.

In the present invention, when measuring body composition according to the bioelectrical resistance analysis method, when the body weights distributed to both feet are different, the impedance is changed according to the difference in the body weights to be distributed. There is an advantage in that a more accurate body composition index can be derived by measuring the load distribution applied by subdividing and correcting the measured bioimpedance by referring to the impedance correction value of a preset lookup table based on this.

1 is a state diagram of a conventional human body component analysis device,
2 is a plan view and a side view of a body composition analyzer according to the present invention,
Figure 3 is an installation state of the pressure sensor according to the present invention.
4 is a block diagram of a body composition analyzer 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 fully describe the present invention to those of ordinary skill in the art, and detailed descriptions of well-known functions and configurations determined to unnecessarily obscure the subject matter of the present invention are omitted. .

2 is a plan view and a side view of the 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 cuboid shape having a relatively low height.

When the subject is placed on the body 10, bioimpedance is measured for body composition analysis at a position where the front and rear parts of the left foot contact each on the upper surface of the body 10, and the position where the front and rear parts of the right foot contact, respectively. In order to do so, an electrode unit 12 for applying a current and sensing a voltage is installed.

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

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

The pressure-sensitive sensor 16, as shown in Figure 3, a plurality of first sensing leads (16b) are attached in parallel in the horizontal direction on one side of the pressure-sensitive film (16a) while the pressure-sensitive film (16a) A plurality of second sensing wires 16c and 16d are attached to the other side in parallel in the vertical direction. In the drawing, the first sensing lead 16b and the second sensing lead 16c and 16d appear to be disposed on the same plane, but the first sensing lead 16b is attached to the bottom surface of the pressure-sensitive film 16a. Meanwhile, the second sensing leads 16c and 16d are attached to the upper surface of the pressure-sensitive film 16a. Alternatively, the first sensing leads 16b may be attached to the top surface of the pressure-sensitive film 16a while the second sensing leads 16c and 16d may be configured to be attached to the bottom surface of the pressure-sensitive film 16a.

The second sensing lead 16c is for example for measuring the depressurization of the left foot, the second sensing lead 16d is for measuring the depressurization of the right foot, and in the illustrated example, the first sensing lead 16b is the left foot contact Although shown as 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, for example, copper, and the pressure-sensitive film 16a is configured to change a resistance value when a thickness changes according to a pressure change. Since the first sensing lead 16b and the second sensing lead 16c, 16d are orthogonal to the grid, the pressure change is sensed at the intersection between the first sensing lead 16b and the second sensing lead 16c, 16d. It is made to do.

The decompression sensor 16 sequentially scans the first sensing lead 16b and the second sensing lead 16c, 16d, thereby making all of the first sensing lead 16b and the second sensing lead 16b 16c. The pressure change at the intersection is sensed. By detecting and summing the pressure change for all intersections between the first sensing lead 16b and the second sensing lead 16c, the pressure of the left foot can be measured and the first sensing lead ( The pressure of the right foot can be measured by sensing and summing the pressure change at all intersections between 16b) and the second sensing lead 16d.

In particular, the pressure-sensitive sensor 16 is the first detection area 16e, the second detection area 16f, the third detection area 16g and the fourth detection area in the left foot contact portion 18a and the right foot contact portion 18b. Like the detection area 16h, it is configured to be subdivided into four quadrants. This is to correct the measurement error of the bioimpedance measured according to the degree to which the subject's body balance is biased in either direction, front, rear, left or right. Of course, it can be configured to be subdivided into four or more quadrants, but considering the cost ratio, the fourth quadrant may be preferable.

4 is a block diagram of a body composition analyzer according to the present invention, wherein each of the detection signals of the electrode unit 12, the load sensor 14 and the pressure sensor 16 is input to the control unit 20 connected.

Another input terminal of the control unit 20 is connected to an input unit 30 that allows a subject to directly 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 correction values corresponding to the order of the decompression size detected by the decompression sensor 16 are stored.

The look-up table 40 is the first sensing area 16e, the second sensing area 16f, the third sensing area 16g, and the fourth sensing area 16h as the areas detected by the decompression sensor 16. It is subdivided into four quadrants, and the reference table value set corresponding to the order of the strongly pressed detection area is stored. For example, if the first sensing region 16e, the second sensing region 16f, the fourth sensing region 16h, and the third sensing region 16g are pressed in order, 0.47 is stored as a correction value corresponding thereto. When the first sensing region 16e, the second sensing region 16f, the third sensing region 16g, and the fourth sensing region 16h are pressed in order, another correction value corresponding thereto is stored. In this way, correction values corresponding to all cases that can be strongly pressed against the sensing regions are stored.

Accordingly, the control unit 20 compensates for the bioimpedance sensed through the electrode unit 12 and the weight of the subject sensed through the load detection sensor 14 and the reference to the lookup table 40 according to the body balance. It is configured to analyze the subject's body composition and output the analysis result by reflecting the value and personal information input through the input unit 30.

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 analyzer according to the present invention to an external device, and particularly configured to transmit using Bluetooth communication as a short-range communication means. It might be.

The display unit 50 is a means for displaying the analyzed body composition results of 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, and the communication module ( 60) may be configured to be transmitted and displayed to the outside, and may be configured to be transmitted and displayed in a separate terminal device through wired or wireless.

The operation of the body composition analyzer having the correction function for the body imbalance of the present invention configured as described above will be described in detail.

When measuring the bioimpedance to measure body composition using the BIA, the measured impedance represents a different value depending on the subject's measurement posture, which affects the body fat index derived using the measured impedance.

5 is a diagram showing an impedance distribution diagram according to body balance for four subjects, and FIGS. 5(a) to 5(d) are diagrams showing distributions as a result of measuring the bioimpedance by varying the measurement posture of each subject.

Here, the horizontal axis indicates the balance, and the closer to 0, the center of the horizontal axis, indicates that the left and right body balance is held, and the more balanced the left (-1, -2, -3, -4) from the center of the horizontal axis, the left. This indicates that the measured impedance value is not uniform, but indicates that 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 uniform. In other words, as the body balance collapses, the bioimpedance changes, so that an accurate value cannot be derived. Therefore, it is necessary to correct the measurement impedance according to the body balance so that more accurate body composition can be analyzed.

On the other hand, in FIG. 5, the vertical axis represents the impedance value measured using the bioelectrical resistance analysis method (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 values 690 to 710 can be viewed as normal impedance.

Hereinafter, an impedance correction method 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 an impedance obtained by adding a preset impedance to the measurement impedance measured through the electrode unit 12.

The correction impedance may be expressed as αx+βy.

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

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

x and y are correction values referenced in the look-up table 40, respectively, as described above, the first sensing area 16e, the second sensing area 16f, and the third sensing area of the decompression sensor 16 are detected. It is subdivided into four quadrants, such as the sensing area 16g and the fourth sensing area 16h, and is set as a matching table value corresponding to the order of the strongly pressed sensing area, corresponding to all cases where the strong sensing area can be pressed. This is the correction value. These corrections can be used to make statistics reliable, for example, by measuring a large number of 100 or more experimenters.

As described above, the more accurate impedance is measured by reflecting the error according to the change in the subject's body balance, and the measured impedance is separately measured with the weight measured by the load sensor 14 and personal information input through the input unit 30. If it corresponds to the well-known body composition analysis formula, such as the body moisture formula described above, the control unit 20 can analyze the body composition more accurately.

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

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

Claims (5)

In the body composition analysis device that can stand in an upright position and analyze the body composition by measuring the bioimpedance through the current applied to the sole of the foot,
An electrode unit installed on an upper surface of the body to measure bioimpedance for body composition analysis in contact with the front and rear portions of the left sole and the front and rear portions of the right sole;
A load sensing sensor installed on the bottom of the four corners of the body to measure weight;
A decompression sensor installed to detect body balance by subdividing and measuring the pressure applied to the central part of the left sole and the central part of the right sole from the upper surface of the body into the sensing area of the quadrant;
An input unit installed on one side of the body and configured to input information regarding height, age, and gender as personal information of a subject required for body composition analysis;
A look-up table in which correction values corresponding to the order of the decompression size detected by the decompression sensor are stored in the sensing area of the quadrant;
Analyze the body composition of the subject by reflecting the bioimpedance sensed through the electrode part, the weight of the subject sensed through the load sensor, the correction value referenced in the lookup table according to the body balance, and personal information input through the input part Body composition analysis device having a correction function for the body imbalance, characterized in that comprises a.
According to claim 1, In the pressure sensor, a plurality of first sensing wires are attached in a horizontal direction to one side of the pressure-sensitive film, while a plurality of second sensing conductors are attached in a vertical direction to the other side of the pressure-sensitive film. The body composition analysis device having a correction function for body imbalance, characterized in that the resistance value is changed in response to the pressure applied to the film at each intersection where the first and second sensing leads cross.
According to claim 1, The correction value of the look-up table is a body composition analyzer having a correction function for body imbalance, characterized in that made by measuring a number of experimenters with a sample.
The method of claim 1, wherein the control unit calculates the average value of the depressurization size of the left foot and the depressurization size of the right foot detected by the decompression sensor, and then the difference between the decompression size of the left foot and the average value α and the depressurization size of the left foot and the average value After receiving the difference β, the correction value according to the decompression size of the quadrant detection area of the left foot, and the correction value y according to the decompression size of the quadrant detection area of the right foot, calculate the correction impedance according to the formula αx+βy, and then through the electrode part. Body composition analyzer having a correction function for body imbalance, characterized in that it is made to derive the impedance after correction by adding to the measured impedance.
The body composition analyzer having a correction function for body imbalance, according to claim 1, wherein a communication module for wirelessly transmitting body composition information analyzed by the control unit to an external device is connected to an output terminal of the control unit.

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