WO2017171228A1

WO2017171228A1 - System for measuring bio-signal including arrhythmia using smart scale

Info

Publication number: WO2017171228A1
Application number: PCT/KR2017/001443
Authority: WO
Inventors: 남윤영; 한태양
Original assignee: 순천향대학교 산학협력단
Priority date: 2016-03-30
Filing date: 2017-02-10
Publication date: 2017-10-05
Also published as: KR20170111855A

Abstract

The present invention relates to a system for measuring a bio-signal including arrhythmia using a smart scale that is capable of measuring bio-information such as PPG, ECG, and arrhythmia of a user who steps on the scale that uses a metal electrode and a camera for photographing the soles of feet.

Description

Bio-signal measurement system including arrhythmia using a smart scale

The present invention relates to a bio-signal measurement system including arrhythmia using a smart scale which can use a camera and the metal electrode for recording the sole of the foot to measure the biological information of the user such as a line of the PPG, and ECG arrhythmia up on the scale.

As recent high interest in healthcare has been studied a lot of techniques to measure vital signs check the health status. PPG wave light (photoplethysmography, PPG) of a number of bio-signal is simply a signal measured by an absorption of light, the change in blood volume, reflection and scattering in the blood vessel in accordance with the heart rate as a signal to monitor bio-signals. In the medical instrumentation field it is used when analyzing the PPG signal to measure the blood oxygen saturation in steady state. PPG is used to measure the oxygen saturation of arterial blood, measuring the number of peaks of the PPG signal per minute, you can calculate the pulse rate.

Non-binding detection research on heart rate and respiration signal by using a reflective PPG sensor so far have been proposed by various researchers. In the respiratory rate measured by the PPG the accuracy improved by the motion artifact, without the discomfort of the surface of the water continues to the respiratory and heart rate signals by attaching a PPG sensor on the back of the lying subject to the air pillow neck to monitor vital signs and extracted.

There measuring the PPG signal, typically using a transmission-type PPG sensor is measured in number of the blood vessels fingers or toes. These sensors when moving a finger or toe to measure because the signal from the finger or toe, it is difficult to measure the correct signal.

An object of the present invention is to provide a bio-signal measurement system including arrhythmia using a smart scale which can use a camera and the metal electrode for recording the sole of the foot to measure the living body information such as line user of PPG, ECG and arrhythmia up on the scale there used.

It is another object of the present invention measures the ECG, the metal electrode and the PPG signal from the user of the foot image taken by the camera, to provide a bio-signal measurement system including arrhythmias using this scale to diagnose the arrhythmia using is.

Measuring living body signals framework including arrhythmia using a smart scale according to the invention, with the sole of the foot to the upper foot is placed footrest 11 is formed scale (10); Composed of a scale 10 and the terminal 20 receives the information of weight measured at the scale (10) in communication,

Scale 10, a camera 12 for photographing the sole of the foot placed on the foot plate (11) of the scale (10) and; Light source 13 to the light source toward the upper to the sole of the foot position in the lower portion of the foot plate (11) of the scale (10) and; A metal electrode 14 which is located in the foot plate (11) of the scale (10) measures the signal electrode and the sole; From the terminal (20) being provided for the control signal of the photographing operating unit a weight information measured by the scale 10, the biological information measured by the image information, the metal electrode 14 with the camera 12 to the terminal 20 providing the communication unit (16) for; including and

Terminal 20, the scale controller 21 to provide an On / Off control signal to the operating unit 15 in the scale 10 and the; Image management section 22 that receives the sole of the foot image taken by the camera 12 of the scale 10 in real time, and; Analyzing the camera image taken in the sole of the foot (12) in real time by PPG (PPG wave light: photolethysmoraphy) PPG signal confirmation section 23 to confirm the signal; RRI calculator 24 for calculating the RRI, which means a time interval between the R peak from the PPG signal of the sole of the foot through the confirmation OK PPG signal portion 23 and; ECG confirmation unit 25 to confirm the ECG measured from the metal electrode 14 of the scale, and; A feature point extraction unit 26 which, using the ECG signal and determine from the RRI ECG confirmation unit 25 of the RRI calculator 24 extracts a feature point for the arrhythmia classification; OK arrhythmias by using the feature points extracted from the feature point extraction section 26 determines the arrhythmia portion 27 and; It characterized in that it comprises a display unit 28 for displaying identifying information for the RRI, ECG, arrhythmias measured on the scale for your review.

Preferably, the scale 10 includes a camera 12, light source 13, a metal electrode functioning section 15 for controlling the On / Off of 14; characterized by further comprising: a.

Preferably, the metal electrode 14 is left foot is characterized in that the position of the heel;; (Right Leg, + LL) (LL Left Leg, +), the right foot.

Preferably, PPG signal confirmation section 23 of convex portion of 17 parts, a concave portion is 27 in detecting the bottom of the convex portion of 20 parts or 17 parts on the bottom of the little toe on the toe portion in the bottom of the big toe in any of the images in the image it is characterized in that to determine the PPG signal.

Preferably, ECG confirmation unit 25 from the original signal to determine the ECG type as ECG IC, via the signal buffer after passing through a pass filters high frequency signals received from the metal electrode 14, a high pass filter noise component is characterized in that removal and extracting the peak component.

Bio-electrical signal measurement including arrhythmia using a smart scale system of the present invention determine the PPG signal from the foot image of the user shot by the camera, view the ECG of a metal electrode, and by using this, to diagnose the living body information such as cardiac arrhythmias that there is an effect.

Figure 1 is a schematic diagram of a bio-signal measurement system including arrhythmia using a smart scale according to the present invention.

Figure 2 is a block diagram of a scale according to the present invention.

3 is a block diagram of a terminal according to the present invention.

4 is an exemplary index of each region of the sole according to the invention.

Figures 5a through 5d are each part Bland-Altman Plot fingertip and the sole according to the invention.

Figure 6 is a graph of the ECG signal measured in the scale with the metal electrode.

With reference to the accompanying drawings, in examine in detail with respect to the bio-signal measurement system including arrhythmia using a smart scale according to the present invention.

Methods of accomplishing the advantages and features of the present invention and reference to the embodiments that are described later in detail in conjunction with the accompanying drawings will be apparent. However, the invention is not limited to the embodiments set forth herein may be embodied in many different forms, but the present embodiments are to complete the disclosure of the present invention, ordinary skill in the art will to those provided to indicate that the full scope of the invention, the present invention will only be defined by the appended claims. Like reference numerals throughout the specification refer to like elements.

The bio-signal measurement system, a platform 11, sole feet placed on the top is formed in the scale 10, which measures the user's weight, including arrhythmia using a smart scale according to an embodiment of the present invention as shown in Figure 1 and .; In communication with the scale (10) it comprises a terminal 20 receives the information of weight measured at the scale (10). In this case, the footrest 11 of the scale 10 is preferably a transparent material such as glass. Or the terminal 20 is preferably a wireless terminal, such as integrally formed with the scale (10) or smart phone. Weight measurement of scale 10. Here it is the same as for a normal scale 10 using the load cell, etc. and the description thereof will be omitted.

The scale 10 as shown in Figure 2 includes the camera 12, light source 13, a metal electrode 14, the operation unit 15, communication unit 16.

Foot-up unit 12 to the user's foot placed on the foot plate (11) of the scale 10 using the camera shot for a certain period of time. The camera 12 is preferably located in the lower portion of the foot plate (11). The camera is preferably shot at 30 frames per second. One side of the camera 12, and the light source 13 to the light source to capture a sharp foot position. At this time, the light source 13 is preferable to use an infrared ray, and it is preferable that the light source toward the upper to the sole of the foot position in the lower portion of the foot plate (11) of the scale (10).

Metal electrodes 14 are located in the footboard 11 of the scale 10 and measures the signal electrode to the sole of the foot. At this time, the metal electrode 14 is left foot preferably located in the heel portion of the;; (Right Leg, + LL) (LL Left Leg, +), the right foot.

Operating unit (15) controls the On / Off of the camera 12, light source 13, the metal electrode 14. At this time, the operation portion 15 is preferred to control the operation while the radio communication with the camera 12, light source 13, the metal electrode 14.

Communication unit 16 includes a weight information measured by the scale (10) being provided for the control signal of recording the operation from the terminal 20, the image information shot by the camera 12, the metal electrode 14, such as the biological information measured by the It provides. In this case, the communication unit 16 are to communicate wirelessly, such as NFC communication, or the terminal 20 and the wire.

3, the terminal 20 is the scale the control unit 21, an image management unit (22), PPG signal identification unit (23), PPI calculation unit (24), ECG check unit 25, a feature point extraction unit 26, it includes an arrhythmia confirmation unit 27 and the display unit 28.

Scale, the control unit 21 provides On / Off control signal to the operating unit 15 in the scale 10. By the scale the control unit 21 of this terminal 20 can control the operation of the camera 12, light source 13, a metal electrode 14 of the scale 10 in the remote.

Image management section 22 is provided with an image taken by the camera 12 of the scale 10 in real time. At this time, the video management unit 22, it is preferable to store the received image.

PPG signal confirmation section 23 PPG analyzes the foot image taken by the camera 12 in real time: confirms the (optical PPG wave photolethysmoraphy) signal. PPG signal by confirming the change in blood volume in the blood vessel in accordance with the heart rate is the intensity value of the RED band and Green band of the video shot by the camera can be checked to be periodically changed, by measuring the number of minute peaks of the PPG signal pulse to be able to evaluate. At this time, the image to determine the PPG signal is a bottom of the convex portion of 20 parts or 17 parts on the bottom of the little toe on the convex portion of 17 parts, detecting the toe at the bottom of the big toe many blood vessels, such as 4 degrees from the foot image that the concave portion of portion 27 preferably in the area, and particularly preferably 17 parts.

PPI and calculator 24 calculates the PPI (Peak to Peak Interval), which means the time between the peak and the peak from the PPG signal of the sole of the foot through the confirmation OK PPG signal section 23. Accordingly, when the heart Park Dongsu increases and decreases the PPI, when relaxed, so heart Park Dongsu reduction will increase the PPI.

ECG confirmation section 25 confirms the ECG measured from the metal electrode 14 of the scale, to detect the R wave. ECG confirmation unit 25 can confirm the input with the ECG electrocardiogram measuring IC, via the signal buffer after passing through a high-pass filter a signal received from the metal electrode 14. At this time, it is a high-pass filter is preferred to use a savitzky-golay filter to the noise component from the original signal is removed and restores the peak component.

ECG confirmation unit 25 of the present invention is to increase SNR by using the AC-Coupling circuit and the filter of the bridge type, and using the phase signal in order to remove respiratory noise and power supply noise by applying savitzky-golay filter motion artifact noise by removing it is desirable to detect the ECG signal. And, it is possible to signal processing to obtain a more stable signal through the process and the common mode LMS application techniques. In this case, the transfer function of the AC-Gdd Coupling circuit is equal to the expression (2) to the Laplace transform of the differential output and differential input Vod Vid.

Gdd = sR2C / (1 + sR2C ) (2)

A feature point extraction unit 26 extracts a feature point for the arrhythmia classification, using the R wave detected by the PPI calculator 24 and the ECG check unit (25). For example, the RR interval, the amplitude of the R wave, to extract the amplitude variation of the R-wave classifying PVC and PAC by and, to classify the VT extracts the continuity of the RR intervals, to extract the QRS width Normal (normal signal), can classify BBB, Paced beat.

Arrhythmia confirmation unit 27 classifies the arrhythmia, such as PVC, PAC, Normal, BBB, Paced beat by using the feature points extracted from the feature point extraction unit (26). Accordingly arrhythmia classification unit may be determined that the ECG signal containing a specific vein pattern.

Display section 28 displays the confirmation information for the PPI, ECG, arrhythmias measured on the scale for your review. At this time, this information is preferably represented by the represented by the character or graph.

A PPG signal of the sole and the index finger end for the five experimenter was measured to confirm that the measured PPG in the region of the sole which is a PPG signal measured at the fingertip match.

First, was taken plantar image from the camera which scaffold is positioned in the scales inside made of a glass plate, and was a smart phone camera for detecting right-hand shot images, and 5 in Figure 17 of the sole, such as 4, 20, 27, 51 measured with the change of the value of the PPG signal and the intensity of the portion the fingertip shown in Table 1 below. At this time, PPG signal was confirmed that the intensity value of the RED band and Green band of an image taken by the camera to be periodically changed. Table 1 shows the change in difference value between the intensity value of the green light in the range 0 to 255.

	Experimenter 1	Experimenter 2	Experimenter 3	Experimenter 4	Experimenters 5	Average
Detection	-0.01	.086	.667	.257	.146	.229
17 sites	.005	.037	-0.315	.174	.113	.014
20 sites	.015	.031	.297	.162	.284	.157
27 sites	.038	.283	.625	.335	.313	.318
51 sites	.278	.081	.415	.377	.253	.280

As shown in Table 1, it was similar to the index finger tip the PPG signal obtained from the region 17, region 20, region 27 of the portion of the sole and the PPG signal. In particular the average of the PPG signal 17 parts, 20 parts and confirmed that similar to the average PPG signal of the index finger tip.

On the other hand, the parts of the PPI index finger tip and the PPI of the PPG signal obtained from the parts of the sole of the foot showed in Figures 5a through 5d compared to analysis using a Bland-Altman Plot, index finger tip and the sole of the foot is a significant range within it was confirmed that distribution.

We measured the biological potential difference based on the left foot and the right foot, the reference signal is measured using the ECG module biopack the finger.

As shown in Figure 6, the ECG signals measured in the scale with the measurement results and confirmed that the metal electrode is similar to the ECG signal of the ECG module measured in the finger.

The present invention is limited only to the preferred embodiment described above, but will capable of performing addition, modification, replacement or in addition to a number of within a range not departing from the gist of the present invention are those of ordinary skill in the art If it will readily understand. If belonging to these improvements, modifications, substitutions, or additional embodiment the appended claims the following categories according to beomui is also considered to belong to the technical spirit of this invention.

Reference Numerals

10: 11 Scale: Scaffolding

12: camera, 13: light source

14: metallic electrode 15: working section

16: communication unit

20: terminal 21: the scale control

22: video management unit 23: PPG signal identification unit

24: PPI calculating section 25: ECG check unit

26: a feature point extraction unit 27: arrhythmia confirmation unit

28: display unit

Claims

Scale 10 foot is formed with a foot plate (11) placed at the top and the foot; Composed of a scale 10 and the terminal 20 receives the information of weight measured at the scale (10) in communication,

Scale 10,

Camera 12 for photographing the sole of the foot placed on the foot plate (11) of the scale (10) and;

Light source 13 to the light source toward the upper to the sole of the foot position in the lower portion of the foot plate (11) of the scale (10) and;

A metal electrode 14 which is located in the foot plate (11) of the scale (10) measures the signal electrode and the sole;

From the terminal (20) being provided for the control signal of the photographing operating unit a weight information measured by the scale 10, the biological information measured by the image information, the metal electrode 14 with the camera 12 to the terminal 20 providing the communication unit (16) for; including and

Terminal 20,

Scale, the control unit 21 to provide an On / Off control signal to the operating unit 15 in the scale 10 and the;

Image management section 22 that receives the sole of the foot image taken by the camera 12 of the scale 10 in real time, and;

Analyzing the camera image taken in the sole of the foot (12) in real time by PPG (PPG wave light: photolethysmoraphy) PPG signal confirmation section 23 to confirm the signal;

PPI calculator 24 for calculating the PPI, which means the time between the peak and the peak from the PPG signal of the sole of the foot through the confirmation OK PPG signal portion 23 and;

ECG confirmation unit 25 to confirm the ECG measured from the metal electrode 14 of the scale, and;

PPI calculating section feature point extraction unit 26 for extracting a feature point for the arrhythmia classification, using the confirmation signal and the ECG in the PPI ECG confirmation unit 25 of the portion 24 and;

OK arrhythmias by using the feature points extracted from the feature point extraction section 26 determines the arrhythmia portion 27 and;

Bio-signal measurement system including arrhythmia using a smart scale which is characterized in that it comprises a display unit 28 for displaying identifying information for the PPI, ECG, arrhythmias measured on the scale for your review.
The method according to claim 1, the scale 10 includes a camera 12, a light source 13, a metal electrode functioning section 15 for controlling the On / Off of 14; using a smart scale which is characterized in that it further comprises a bio-signal measurement system including arrhythmia.
The method according to claim 1, the metal electrode 14 is left leg (LL; Left Leg, +), the right foot; measuring biological signals, including arrhythmia using a smart scale, characterized in that positioned in the heel portion of the (LL Right Leg, +) system.
The method according to claim 1, the scale 10 of the communication unit 16 is bio-signal measurement system including arrhythmia using a smart scale which is characterized in that the communication terminal 20 and the wired or wireless.
The method according to claim 1, the terminal 20 the image management section 22 biological signal measuring system, including arrhythmia using a smart scale, characterized in that for storing the received image.
The method according to claim 1, PPG signal identification unit 23 is the 27 convex portions of 17 parts, a concave portion at the bottom of the convex portion of 20 parts or 17 parts on the bottom of the little toe on the index toe in the bottom of the big toe bio-signal measurement system including arrhythmia using a smart scale, characterized in that to determine the PPG signal in which one image in the image area.
The method according to claim 6, PPG signal confirmation section 23 biological signal measuring system, including arrhythmia using a smart scale, characterized in that to determine the PPG signal from the image 17 of the region.
The method according to claim 1, ECG check unit 25 and input to the ECG IC, via the signal buffer after passing through a pass filters high frequency signals received from the metal electrode 14, determine the ECG, and the source to the high-pass filter noise component in the signal is removed and the physiological signal measuring system, including arrhythmia using a smart scale, characterized in that for extracting the peak component.
The method according to claim 1, the display section 28 biological signal measuring system, including arrhythmia using a smart scale which is characterized in that display to display a character or a graph.