KR101041943B1 - Body surface potential measurement device using electric non-contact ECG - Google Patents

Abstract

The present invention relates to a body surface potential measurement device using an electrical non-contact electrocardiogram, the technical problem to be solved is to remove the electrical distortion generated during the electrical non-contact electrocardiogram measurement and to measure the body surface potential by using a precise ECG obtained through this It is to provide a device.

To this end, the body surface potential measurement device using the electrical non-contact electrocardiogram according to the present invention is an electrocardiogram of a plurality of amplifier-attached electrodes arranged in close proximity to a place of clothing without direct contact with an examinee's body in a lattice structure consisting of horizontally and vertically A measurement unit, a signal processor electrically connected to one side of the ECG measuring unit to filter external noise, and amplify the filtered signal, an A / D converter electrically connected to one side of the signal processor, and A A computer that is electrically connected to one side of the / D converter and analyzes the applied signals, a power supply that supplies power to the body surface potential measuring device according to the present invention, and is placed in close proximity to the garment without direct contact with the body of the subject. A ground plane installed therein, wherein the computer is configured to Discloses a body surface potential measuring apparatus using the electric non-contact ECG characterized in that the analysis of the examinee body surface potential distribution by mapping on.

Electrocardiogram, Body Potential, Non-Contact, Amplifier Attached Electrode, Bias Resistor

Description

Apparatus for Measuring Body Surface Potential Mapping Using Electric Non-Contact Electrocardiogram

The present invention relates to an apparatus for measuring body surface potential using an electro-contact electrocardiogram (ECG).

Electrocardiogram is the abbreviation for cardiac electrical conductivity, which is a curve recording the active current according to the contraction of the heart.

The excitation of the myocardium occurs in the sinus sinus and leads to the atrium and ventricular direction. Therefore, when the excitation is induced on an ammeter (electrocardiograph) at any two points, the heart's active current is depicted graphically.

Using this method, the electrocardiogram generated by the electrical excitation generated by the myocardial activity is transmitted to the surface of the body and recorded as an electric wave, which is very important in diagnosing heart disease.

Here, when the base of the heart is excited and electrically negative with respect to the appendage, when the guide of the ammeter is curved upwards, it protrudes from the equipotential line. The place is called P wave, Q wave, R wave, S wave, T wave and U wave according to the name of W. Eindhoven.

As a method of obtaining an electrocardiogram for diagnosing a heart disease, electrocardiogram measuring method using standard guidance of both hands, right hand and left foot, left hand and left foot is used. In addition, unipolar induction and chest Induction, etc.

Electrocardiogram measurements are used to diagnose coronary artery disease such as angina pectoris and myocardial infarction, as well as to diagnose various arrhythmias and electrolyte abnormalities, or to investigate and confirm the presence of cardiac abnormalities during surgery. It is broad and very important for the diagnosis of heart disease.

The electrocardiogram is a representative bioelectric signal along with EMG, EEG, and bioimpedance signals, and is the most basic signal for diagnosing a subject's health in a non-invasive manner. It is a vital vital signal and is widely used in clinical practice.

However, ECG measuring equipment, which is commercially available and widely used in hospitals, measures 12 leads by attaching 1 electrode to each limb and 6 electrodes on the chest, but does not measure many diseases including myocardial infarction. I have a problem

On the other hand, the body surface potential distribution can be determined by directly attaching about 64 to 128 electrodes to the skin, measuring ECG of all parts of the chest, mapping them to a two-dimensional plane, and monitoring the activity of the heart. have.

Since the body surface potential distribution is measured with the difference in the potential of the upper body, the ECG measured at each electrode should be accurate and free of distortion.

As described above, the method for determining the body surface potential distribution is described by Simon D. Carley (Simon D. Carley, Michelle Jenkins, Kevin Mackway Jones, 'Body surface mapping versus the standard 12 lead ECG in the detection of myocardial infraction amongst Emergency Department) patiens: a Bayesian approach ', Resuscitation Volume 64, Issue 3, March 2005, pages 309-314), compared to 12-induced ECG devices used in myocardial infarction or other heart diseases. It is known to be excellent.

However, when measuring this, the inspector must attach the electrode to the skin of the examinee one by one, and the examinee is restricted from movement from the preparation of the measurement until the electrode is removed after the measurement, and it causes a lot of time loss for one test. There is this.

In addition, there is a problem that a large number of electrodes are wasted for one inspection because the electrodes are disposable.

In recent years, the electrical non-contact electrocardiogram measuring device forms a capacitance between the skin and the electrode and can measure the electrocardiogram even when dressed.

Due to the characteristics of the electrical non-contact electrocardiogram, the body surface displacement measurement using this electrode does not require attaching the electrodes one by one, and it is expected that the inspection time can be significantly reduced, and the waste of the skin-contact electrode will not be generated.

1 is a conceptual diagram of non-contact ECG measurement. The technique of the non-contact ECG measuring device has been published in the paper by Yong-Gyu Lim (Yong Gyu Lim, Ko Keun Kim, Suk Park 'ECG measurement on a chair without conductive contact', IEEE Transactions on Biomedical Engineering, Volume: 53, Issue: 5 on page (s): 956-959, 2006-04-18).

In the above paper, the amplifier type electrode used OPA124 with 10 ¹³ [Ω] input resistance and 1 [pF] as an op amp, but it was used by connecting bias impedance 3 [GΩ] to the ground of the op amp It was. However, when measuring ECG through this system, clothing between skin and electrode forms a kind of high-band filter, which causes distortion in low-frequency signal, which can not be used for non-contact ECG measurement except heart rate. There is this.

Since the measurement of the non-contact body surface potential distribution is performed with the difference of the potential of the upper body, the electrocardiogram measured at each electrode should be precise and free from distortion in both P wave Q wave R wave S wave T wave.

The present invention has been made to solve the above problems, by removing the electrical distortion generated during the electrical non-contact electrocardiogram measurement and using the precise electrocardiogram obtained through the body surface so that the subject does not feel rejection in a simple and short time It is an object of the present invention to provide a device capable of measuring a potential.

In order to achieve the object as described above, the body surface dislocation measuring device using the non-contact electrocardiogram according to the present invention comprises a plurality of amplifier-attached electrodes horizontally and vertically installed close to the right place of the garment without direct contact with the body of the examinee. An electrocardiogram measuring unit arranged in a lattice form, a signal processor electrically connected to one side of the electrocardiogram measuring unit to filter external noise, and amplify the filtered signal, and an A / electric unit electrically connected to one side of the signal processing unit A D conversion unit, a computer electrically connected to one side of the A / D conversion unit, a computer for analyzing the applied signals, a power supply unit for supplying power to the body surface potential measuring apparatus according to the present invention, and a direct contact with the body of the examinee A ground plane installed in close proximity to the garment, without the need for a plurality of authorized A method for mapping electrocardiographic signals on a two-dimensional plane can be analyzed examinee body surface potential distribution.

The electrocardiogram measuring unit may include a total of 49 amplifier-attached electrodes arranged in seven horizontally and seven vertically.

The electrode with an amplifier may include an electrode surface provided at one side, a preamplifier for amplifying and impedance converting a biosignal input through the electrode surface, and a shield provided outside the preamplifier.

A bias resistor may be electrically connected to the non-inverting input terminal of the preamplifier, and the value of the bias resistor may be 100 gigaohms.

The signal processor is electrically connected to each of the amplifier-attached electrodes, and the ECG signal applied to the signal processor may sequentially pass through the high pass filter, the signal amplifier, and the low pass filter.

The high pass filter may be a second high pass filter for passing a signal of 0.05 Hz or more.

The amplifier may be a voltage amplifier that is 500 V / V.

The low pass filter may be a secondary low pass filter for passing a signal of 250 Hz or less.

The A / D converter may convert an analog electrocardiogram signal input through the signal processor into a digital signal.

The computer may ensemble a plurality of electrocardiogram signals received from the A / D converter, and analyze the subject surface potential distribution from the plurality of electrocardiogram signals by mapping them on a two-dimensional plane.

The computer may be a desktop computer or a laptop computer.

The power supply unit may be a DC voltage source or an AC voltage source.

When the body surface potential measuring apparatus according to the present invention is applied to a chair, the ECG measuring unit is installed at the back of the chair, and the ground plate may be installed at the position of the buttocks of the examinee among the seats of the chair.

When the body surface potential measuring device according to the present invention is applied to a bed, the ECG measurement unit is installed on one side of the upper surface of the bed sheet where the shoulder of the examinee is positioned, and the ground plate is installed on the other side of the upper surface of the bed sheet where the hip of the examinee is located. Can be.

When the body surface potential measuring device according to the present invention is applied to a driver's seat, the ECG measuring part is installed at a position where the driver's thigh is located among the seats of the driver's seat, and is provided in front of the driver's seat to directly adjust the steering wheel to adjust the steering of the vehicle. Ground plates may be installed to allow contact.

As described above, according to the body surface potential measurement apparatus using the non-contact electrocardiogram according to the present invention, the signal of the P, T, and ST segments of the ECG by removing the signal distortion in the low frequency band generated during the measurement of the non-contact ECG By obtaining accurate ECG, it is effective to accurately detect mental and physical activity of the examinee.

In addition, in examining the body surface potential distribution by using the measured accurate electrocardiogram, it is possible to easily measure the accurate body surface potential distribution without attaching the electrodes one by one, and it is possible to solve the constraint and discomfort felt by the examinee.

In addition, the measured body surface potential distribution mapping can accurately see mapping from P, T, and ST segments belonging to low frequencies in addition to high frequencies such as QRS waves. It is easier, faster, and more accurate than the distribution measurement, and there is an effect that the subjects do not feel the constraints, so the body surface displacement can be measured in everyday life, and thus the presence of more accurate disease than ECG will be known.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that the same components or parts in the drawings represent the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the gist of the present invention.

2 is a block diagram of an apparatus for measuring body surface potential using an electrical non-contact ECG according to the present invention. As shown in FIG. 2, the body surface potential measuring device 1 using the non-contact electrocardiogram according to the present invention includes an electrocardiogram measuring unit 100, a signal processing unit 200, an A / D converter 300, and a computer 400. It is configured to include a power supply unit 500 and the ground plate 600.

The electrocardiogram measuring unit 100 includes a plurality of amplifier-attached electrodes 110 installed in close proximity to a place of clothing without direct contact with the body of the examinee. In FIG. 2, seven amplifier-attachable electrodes 110 are arranged in a horizontal direction and seven in a vertical direction, so that a total of 49 amplifier-attached electrodes 110 are installed in the electrocardiogram measuring unit 100. As long as the amplifier-attached electrode 110 is installed to obtain a plurality of electrocardiograms, any one may be used, and the number or arrangement of the amplifier-attached electrodes 110 is not limited thereto.

As shown in FIG. 3, the electrode attachment electrode 110 has an electrode face 111 at one side, and amplifies a minute biosignal input through a displacement current without direct body contact. A pre-amp (112, pre-amp) for converting to the preamplifier 112, the preamplifier 112 is made to be shielded by a shield (113. shield) provided on the outside.

On the other hand, the measurement of the biopotential in a system that is not in electrical contact with the surface of the body is achieved by the displacement current. Here, the displacement current is a transmission method of an electrical signal between the skin and the electrode surface of the human body, and as the potential changes in the body, a change in voltage is generated on an electrode sandwiched between a non-conductive material such as clothes, blankets, and leather. , The current generated accordingly.

For example, when the capacitor is discharged, the electric charge on the top of the pole plate flows to the conduction current through an external conductor, and at the same time, the electric force density is changed between the pole plates of the capacitor so that the displacement current becomes one electric circuit as a whole. Is formed and a magnetic field that changes in time by these currents is generated and propagated in space in the form of electromagnetic waves.

 In the present invention, after the bio-signal generated on the surface of the subject (B) of the subject is input to the amplifier-attached electrode 110 through the displacement current, the signal generated by the amplification and impedance conversion is measured, and the measured minute bio-signal In order to convert the voltage into a high gain voltage, the amplifier-attached electrode 110 is configured to generate a high input impedance.

The signal processor 200 is electrically connected to one side of the ECG measuring unit 100 to filter external noise and amplify the filtered signal.

In more detail, the signal processor 200 is electrically connected to each of the preamplifiers 112 of the amplifier-attached electrode 110, and thus the biosignal generated by the ECG detected by the amplifier-attached electrode 110. Is changed to a voltage.

The signal processor 200 prevents a base line from swaying in the biosignal that has passed through the preamplifier 112, and removes a change in the residual offset according to the biosignal when converting the biosignal into a voltage. A high pass filter 210 for filtering, an amplifier 220 for amplifying a minute bio signal at a constant magnification, and a low pass filter 230 for outputting an analog signal of a low pass signal band after being amplified by the amplifier 220. It includes.

Here, the high pass filter 210 preferably uses a second sallen-key high pass filter through which a signal having a frequency of 0.05 Hz or higher is used, and the amplifier 220 uses a voltage amplifier of 500 V / V. It is preferable to use, and the low pass filter 230 is preferably a low pass filter for passing a signal having a frequency of 250 Hz or less. Because the electrocardiogram sees a signal of 100 Hz or less, since the phase changes at a cut-off frequency, it is preferable to set it to about 250 Hz considering that the electrocardiogram frequency is less than about 50 Hz.

The A / D converter 300 converts the analog ECG signal input through the signal processor 200 into a digital signal. The A / D converter 300 may be any device as long as it is a device capable of converting an analog signal into a digital signal, and the type of the A / D converter 300 is not limited thereto.

The computer 400 is electrically connected to one side of the A / D converter 300, and analyzes the body surface potential distribution by analyzing the applied signals.

In more detail, the computer 400 first ensemble a plurality of ECG signals received from the A / D converter 300 based on an R peak.

Here, an ensemble average is a method of effectively removing noise by obtaining an average of waveforms for a predetermined time when a periodic waveform comes out in one experiment. Here, the ensemble average was taken around the R peak.

Next, the body surface potential distribution of the examinee may be analyzed by mapping onto the two-dimensional plane by using the ensemble average values of the ECG signals thus obtained.

Meanwhile, the computer 400 may use a personal computer (PC), and a desktop computer or a laptop computer may be used in relation to the type, but the type of the computer is not limited thereto.

The power supply unit 500 supplies power to the body surface potential measuring device according to the present invention. The power supply unit 500 may be a DC voltage source or an AC voltage source. As long as it is possible to supply power to the body surface potential measurement apparatus according to the present invention, any one may be used, and the type of the power supply unit 500 is not limited thereto.

The ground plate 600 is installed close to the place of the garment without direct contact with the body of the examinee, so that the ground plate 600 can be grounded in relation to the amplifier-attached electrode 110.

FIG. 3 is a schematic diagram illustrating a contact relationship between a test subject and an amplifier-attached electrode, FIG. 4 is a configuration diagram of an amplifier-attached electrode, FIG. 5 is a conceptual diagram of a model of an amplifier-attached electrode, and FIG. Fig. 7 is a graph showing the frequency characteristics, and Fig. 7 is a graph comparing the electrocardiogram waveforms measured when the non-contact ECG was measured at 3 giga ohms and the input bias resistance was 100 giga ohms.

On the other hand, since the electrode surface 111 and the electrical path to the electrode surface 111 and the preamplifier 112 maintain a very high impedance with respect to the ground is greatly affected by external noise. Accordingly, in order to minimize the high impedance portion from the electrode surface 111 to the amplifier 220 (refer to FIG. 2), the amplifier amplifier type to which the preamplifier 112 is attached to the electrode surface 111 to reduce external input noise. Electrode 110 is used.

In the present invention, the electrode used in the conventional non-contact electrocardiogram measuring apparatus is improved. That is, the electrode attachment type electrode 110 used in the present invention is a high input impedance amplifier attachment type electrode. As shown in FIG. 4, copper foil was coated on one side of the PCB and gold-plated, and the OPA124 was used as the preamplifier 112. Was used. The OPA124 is a low noise, low bias current, high input impedance semiconductor IC amplifier.

At this time, the bias resistor is engaged with the ground so that the offset of the ECG signal does not fluctuate at the input terminal of the electrode. In the past, a resistor having a size of about 3 gigaohms was used as the resistor.

Referring to FIG. 5, a conceptual diagram of an amplifier-attached electrode is shown. Where Rs is the skin and clothing resistance, Rc and Cc the clothing resistance and capacitance, Cs is the parasitic capacitance of the electrode, Rb is the bias resistance, and Ra and Ca are the input resistance and input capacitance of the OPA124 amplifier. On the other hand, since Rc and Cc form a high band filter, the non-contact ECG electrode exhibits distortion in the low frequency band.

If the value of the bias resistor Rb decreases, the influence of Rc and Cc is relatively large, and the degree of influence of the Rb value is calculated as shown in FIG. 6.

Referring to FIG. 6, the blue solid line is a frequency characteristic curve corresponding to a bias resistance of 1 gigaohm, and the red color becomes a frequency characteristic curve corresponding to a bias resistance of 100 gigaohms toward red.

As shown in FIG. 6, when the bias resistance is small, signal distortion may occur in a low frequency band of 10 Hz or less. Therefore, if a bias resistor of about 100 giga ohms is used instead of the conventional bias resistance of about 3 gigaohms, a signal having the same voltage gain can be obtained evenly from the low frequency region to the high frequency region. The same electrocardiogram as that of the electrocardiogram device can be obtained.

FIG. 7 is a graph illustrating a comparison of the electrocardiogram waveform measured by the non-contact electrocardiogram measuring apparatus having a conventional 3 gigaohm input bias and the apparatus according to the present invention.

That is, referring to FIG. 7, an electrocardiogram when a resistor having a resistance value of about 3 gigaohms is used as an electrocardiogram and a bias resistance measured in contact with the skin, and a bias resistor having a resistance value of about 100 gigaohms is used. You can see a graph comparing the ECG when used. The graph measured using 3 gigaohms has distortion in the low frequency band with ST segment, but the graph measured using 100 gigaohms shows no such distortion.

Therefore, in the body surface potential measurement apparatus according to the present invention, it is preferable to configure the bias resistance of the non-contact ECG electrode to 100 gigaohms.

8 is a block diagram of a signal processing unit of a body surface potential measurement apparatus using an electrical non-contact electrocardiogram according to the present invention, and FIGS. 9A to 9C illustrate measured waveforms, waveforms after passing through a high pass filter, and after passing through a low pass filter. It is a graph showing a waveform.

As illustrated in FIG. 8, when the examinee's electrocardiogram is applied through the amplifier-attached electrode 111, after passing through the preamplifier 112, the high pass filter 210 and the amplifier 220 of the signal processing unit 200. ) And the low pass filter 230 in order. A schematic view of the waveform is shown in FIGS. 9A-9C.

FIG. 10 is a graph showing an ensemble-averaged waveform of the electrocardiogram measured at each electrode, and FIGS. 11A and 11B are diagrams illustrating the distribution of body surface potential in P waves, and FIGS. 12A and 12B are diagrams illustrating Q waves. 13A and 13B are diagrams showing the body surface potential distribution in the R wave, and FIGS. 14A and 14B are diagrams showing the body surface potential distribution in the ST segment.

The body surface dislocation measuring device using the non-contact electrocardiogram according to the present invention can be immediately measured by the test subject is in close contact with the clothes to the ECG measurement unit. In this way, a total of 49 electrocardiograms can be obtained. The electrocardiograms are passed through a high pass filter, an amplifier, and a low pass filter of the signal processor, and are converted into analog and digital signals. The information thus obtained is ensemble averaged in a computer and maps it to a two-dimensional plane. In this way, body surface potential distribution can be observed and disease can be inferred from P wave, Q wave, R wave, S wave, ST segment, and T wave.

That is, each wave such as the P wave and the Q wave represents information about the state of the heart (shrinkage, diastolic, etc.), but at this time, the ECG distribution spreading through the body can accurately infer the disease and measure it. It is an advantage of the body surface dislocation measuring device according to the present invention that the time to be significantly reduced and no electrode waste is generated.

15 is a conceptual diagram illustrating a first embodiment of a body surface dislocation measuring apparatus using an electrical non-contact ECG according to the present invention.

As shown in FIG. 15, when the body surface dislocation measuring device 1 using the electrical non-contact electrocardiogram according to the present invention is applied to the chair 50, the electrocardiogram measuring unit 100 is used to determine the chairs on which both shoulders of the examinee are located. The back plate 51 is provided, and the ground plate 600 is installed in the seat 52 of the chair in which the hip of the examinee is located, thereby measuring the electrocardiogram of the examinee. Here, when the body surface dislocation measuring device 1 using the non-contact electrocardiogram according to the present invention is installed on the chair 50, the ground plate 600 installed on the seat 52 of the chair is used as a reference voltage. By installing the electrical non-contact electrocardiogram measuring apparatus 1 according to the present invention on the chair 50 which can be easily contacted in everyday life, the examinee can measure the body surface potential distribution more comfortably without recognizing the measurement of the body surface potential distribution. Will be.

Meanwhile, in the present embodiment, the ECG measuring unit 100 and the ground plate 600 installed in the chair 50 are respectively exposed to the chair 50, but the ECG measuring unit 100 and the ground plate ( 600 may be installed embedded in the chair (50).

In addition, in the present embodiment, the ECG measuring unit 100 and the ground plate 600 are installed in the seat 52 or the back 51 of the chair, respectively, but the seat 52 and the back of the chair ( 51, the ECG measuring unit 100 and the ground plate 600 may be installed to perform a role as described above.

16 is a conceptual diagram illustrating a second embodiment of a body surface dislocation measuring apparatus using an electrical non-contact ECG according to the present invention.

As shown in FIG. 16, when the body surface dislocation measuring device 1 using the electrical non-contact electrocardiogram according to the present invention is applied to the bed 60, the ECG measuring unit 100 is located at both shoulders or the back of the examinee. The ground plate 600 is installed at one side of the seat upper surface of the bed 60, and the ground plate 600 is installed at the other side of the seat upper surface of the bed 60 where the hip of the subject is located, thereby measuring the distribution of the body surface potential of the subject.

Thus, by installing the body surface dislocation measuring device 1 using the electrical non-contact ECG according to the present invention in the bed 60 which can sleep, the examinee does not recognize the measurement of the body surface potential distribution, and measures the body surface potential distribution more comfortably. You can do it.

17 is a conceptual diagram illustrating a third embodiment of a body surface dislocation measuring apparatus using an electrical non-contact ECG according to the present invention.

As shown in FIG. 17, when the body surface dislocation measuring device 1 using the electrical non-contact ECG according to the present invention is applied to the driver's seat 70, the driver's thigh is located in the seat 71 of the driver's seat. The electrocardiogram measuring unit 100 is installed at the place, and the ground plate 600 is installed to allow direct contact with the steering wheel 80 provided on the front of the driver's seat to control the steering of the vehicle, thereby measuring the distribution of the body surface potential of the driver. Done.

As described above with reference to the drawings illustrating a body surface dislocation measuring device using an electrical non-contact ECG according to the present invention, the present invention is not limited by the embodiments and drawings disclosed herein, the scope of the technical spirit of the present invention Of course, various modifications can be made by those skilled in the art.

1 is a conceptual diagram of non-contact ECG measurement.

2 is a block diagram of an apparatus for measuring body surface potential using an electrical non-contact ECG according to the present invention.

3 is a schematic diagram showing the contact relationship between the test subject and the amplifier-attached electrode.

4 is a configuration diagram of an electrode with an amplifier.

5 is a conceptual diagram modeling an amplifier-attached electrode.

6 is a graph showing frequency characteristics according to a bias resistance value.

7 is a graph comparing the electrocardiogram waveforms measured when the non-contact electrocardiogram is measured with a conventional input bias resistor of 3 giga ohms and when the input bias resistance is set to 100 gigaohms.

8 is a block diagram of a signal processing unit of a body surface dislocation measuring apparatus using an electrical non-contact ECG according to the present invention.

9A to 9C are graphs showing measured waveforms, waveforms after passing the high pass filter, and waveforms after passing the low pass filter.

10 is a graph showing waveforms of ensemble averaged ECGs measured at each electrode.

11A and 11B are diagrams showing body surface potential distribution in P waves.

12A and 12B show body surface potential distribution in Q waves.

13A and 13B are diagrams showing the body surface potential distribution in the R wave.

14A and 14B are diagrams showing the body surface potential distribution in the ST segment.

15 is a conceptual diagram illustrating a first embodiment of a body surface dislocation measuring apparatus using an electrical non-contact ECG according to the present invention.

16 is a conceptual diagram illustrating a second embodiment of a body surface dislocation measuring apparatus using an electrical non-contact ECG according to the present invention.

17 is a conceptual diagram illustrating a third embodiment of a body surface dislocation measuring apparatus using an electrical non-contact ECG according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1: Body surface potential measurement device using an electrical non-contact ECG according to the present invention

100: electrocardiogram measuring unit 110: amplifier attached electrode

111: electrode surface 112: preamplifier

113: shield 200: signal processing unit

210: high pass filter 220: amplifier

230: low pass filter 300: A / D conversion unit

400: computer 500: power supply

600: ground plate B: the body of the subject

C: garment 50: chair

51: back of the chair 52: seat of the chair

60: Bed 70: car driver seat

71: seat of the driver's seat 80: steering wheel

Claims (15)

An electrocardiogram measuring unit arranged in a lattice structure consisting of a plurality of amplifier-attached electrodes arranged in close proximity to a place of clothing without direct contact with the body of the examinee in a horizontal and vertical manner; A signal processor electrically connected to one side of the ECG measuring unit to filter external noise and to amplify the filtered signal; An A / D converter electrically connected to one side of the signal processor; A computer that is electrically connected to one side of the A / D converter and analyzes the received signals; A power supply for supplying power to the body surface potential measurement apparatus according to the present invention; And A ground plate installed in close proximity to the garment without direct contact with the subject's body; The computer includes an ensemble averaging of a plurality of electrocardiogram signals received from the A / D converter, and analyzes the body surface potential distribution of the subject from the plurality of electrocardiogram signals by mapping them on a two-dimensional plane. Body surface potential measurement device using an electrical non-contact ECG. The method according to claim 1, The electrocardiogram measuring unit body electrostatic potential measurement device using a non-contact electrocardiogram, characterized in that a total of 49 amplifier-attached electrodes are arranged in seven horizontally, seven vertically. The method according to claim 1, The amplifier attached electrode, An electrode surface provided on one side; A preamplifier for amplifying and impedance converting a biological signal input through the electrode surface; And A shield provided outside the preamplifier; Body surface potential measurement device using an electrical non-contact ECG, characterized in that it comprises a. The method of claim 3, A bias resistance is electrically connected to a non-inverting input terminal of the preamplifier, and the value of the bias resistance is 100 gigaohms. The method according to claim 1, The signal processing unit is electrically connected to each of the amplifier-attached electrodes, and the electrocardiogram signal applied to the signal processing unit sequentially passes through the high pass filter, the signal amplifier, and the low pass filter. Body surface potential measuring device. The method according to claim 5, The high pass filter is a body surface potential measurement device using an electrical non-contact ECG, characterized in that the second high pass filter for passing a signal of 0.05 Hz or more. The method according to claim 5, The amplifier is a body surface potential measurement device using an electrical non-contact ECG, characterized in that the voltage amplifier is 500 V / V. The method according to claim 5, The low pass filter is a body surface potential measurement device using an electrical non-contact ECG, characterized in that the second low pass filter for passing a signal of 250 Hz or less. The method according to claim 1, And the A / D converter converts the analog ECG signal input through the signal processor into a digital signal. delete The method according to claim 1, And said computer is a desktop computer or a laptop computer. The method according to claim 1, The power supply unit is a body surface potential measurement device using an electrical non-contact ECG, characterized in that the DC voltage source or AC voltage source. The method according to claim 1, When the body surface potential measuring device according to the present invention is applied to a chair, The electrocardiogram measuring unit is installed in the back of the chair, and the ground plate is installed in the seat portion of the chair where the ground plate of the subject is located, characterized in that the body surface potential measurement apparatus using the non-contact electrocardiogram. The method according to claim 1, When the body surface potential measuring device according to the invention is applied to the bed, The electrocardiogram measuring unit is installed on one side of the upper surface of the bed sheet in which the subject's shoulder is located, and the ground plate is installed on the other side of the upper surface of the bed sheet in which the hips of the subject is located. The method according to claim 1, When the body surface potential measuring device according to the invention is applied to the driver's seat, The non-electrocardiogram of the seat seat of the driver's seat is installed in the position where the driver's thigh is located, the ground plate is installed on the front of the driver's seat to allow direct contact with the steering wheel to adjust the steering of the vehicle Body surface potential measurement device using.

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