KR100868073B1 - Armband type measurment unit of bio-signal - Google Patents

Abstract

The present invention relates to an embedded-based armband biometric terminal that can be easily worn on the upper arm to measure electrical activity of the heart, which is an important organ of the human body, and can be transmitted wirelessly.

The present invention, armband type biometric terminal having a brachial wireless electrocardiograph to measure the electrocardiogram through the ECG electrode 110 in the upper arm (top of the arm), and outputs through the Bluetooth transmission module unit 500; A wrist-type display device 850 having a Bluetooth reception module 840 for receiving and displaying an output signal of the Bluetooth transmission module 500 of the armband type biometric terminal; A computer or an Ultura mobile personal computer (PC / ultra mobile PC) for receiving the output signal of the Bluetooth transmission module unit 500 of the armband type biometric terminal via USB or RS232C; A CDMA EVDO USB modem for transmitting a signal transmitted to the computer or a PC / ultra mobile PC to a remote computer (doctor's computer); Armband type biometric terminal in the biometric system consisting of an ECG analog circuit unit 200 for amplifying and filtering the signal detected from the ECG electrode 110 and converting it into a digital signal; And a digital control unit 400 which removes 60 Hz noise and high frequency components from the signal received by the ECG analog circuit unit 200.

The digital control unit 400 includes an adaptive notch filter, and a 60Hz notch filter 410 for removing 60Hz noise, which is power noise, from a signal output from the ECG analog circuit unit 200; A high frequency component removing unit 420 configured to include a moving average filter and to output a smoothed signal by removing a high frequency component from a signal received from the 60 Hz notch filter 410; And a serial communication module (USART) 430 for converting the output signal of the high frequency component removing unit 420 into a serial signal and transmitting the converted signal to the Bluetooth transmission module unit 500.

Upper arm, electrocardiogram, 60 Hz, notch filter (410), moving average filter, blue, high frequency component removal, Ag / AgCl electrode

Description

Armband type measurment unit of bio-signal

1 is an explanatory diagram for schematically illustrating an armband biometric terminal according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram for schematically illustrating an example of use of the armband biometric terminal of FIG. 1.

3 is a schematic configuration diagram of the armband biometric terminal of FIG.

4 is a configuration diagram of the analog preprocessor of FIG. 3.

FIG. 5 is an explanatory diagram schematically illustrating a transmission process of an armband biometric terminal of the present invention to FIG. 2 to a computer and a wrist display device using Bluetooth wireless communication.

6 is a configuration diagram of the digital control unit of FIG. 3.

7 is a configuration diagram of the ECG electrode of FIG. 3.

8 is a block diagram of the 60 Hz notch filter of FIG. 6.

9 is a block diagram of a moving average filter of the high frequency component removing unit.

10 is an example of the measurement results of the 60 Hz notch filter and the high frequency component removing unit of FIG. 6.

FIG. 11 is an example in which the measurement result of FIG. 10 is enlarged.

FIG. 12 illustrates an example of obtaining an ECG signal with the ultra mobile PC of FIG. 2.

FIG. 13 is an example of communication using the CDMA modem of FIG. 2.

It is explanatory drawing which shows the position of a standard limb induction electrode.

FIG. 15 is an example of a coated Ag / AgCl electrode and a general adhesive electrode of the ECG electrode of FIG. 3.

<Description of Major Symbols in Drawing>

100: wireless electrocardiograph 110: ECG electrode

200: ECG analog circuit unit 210: analog preprocessor

220: protection circuit 230: induction circuit

240: high pass filter 250: amplification unit

260: low pass filter 270: offset circuit

300: A / D conversion unit 400: digital control unit

410: 60 Hz notch filter 420: high frequency component remover

430: serial communication module (USART) 500: Bluetooth transmission module

700: fixed band portion 810: CDMA EVDO USB modem

820: PC / Ultra mobile PC 830: USB / RS232C

840: Bluetooth receiving module 850: wrist display device

The present invention relates to an embedded-based armband biometric terminal that can be easily worn on the arm to measure the electrical activity of the heart, which is an important organ of the human body, and can be transmitted wirelessly.

More specifically, when a heart disease patient or an emergency situation occurs, rather than attaching an electrode to the chest as in the prior art, an armband type biometric terminal that is attached to the upper arm of the patient to quickly transmit the patient's condition to the medical staff for immediate diagnosis and treatment. It is about.

In the conventional electrocardiograph, since an electrocardiogram signal is acquired through an electrode attached to the chest, it may take a long time to mount the electrode, thereby delaying the treatment of the patient. In addition, conventional measuring instruments attach electrodes to the chest during patient transfer or during exercise, and there is a great inconvenience in exercise or transfer when measuring ECG (hereinafter referred to as ECG). It was difficult to monitor in real time.

Therefore, in the event of an emergency, an instrument that can measure ECG signals in a minimum amount of time is required.In addition, ECG can be measured and monitored in real time during patient transport or exercise, and data can be transmitted to a remote doctor as needed. There is a need for a biometric terminal that can.

In other words, in the event of heart disease or emergency situation, it is possible to measure and transmit bio signals easily and accurately, regardless of location, and send them to the medical staff for immediate diagnosis and treatment. If you want to check your health, or at home, a system that allows you to easily monitor your heart condition is desired.

Therefore, to solve this problem, the present invention provides an armband type biometric terminal.

The armband biometric terminal of the present invention obtains an electrocardiogram by attaching the system of the present invention to the upper arm of a patient to measure an electrocardiogram signal in a minimum time during an emergency, and for this purpose, an electrode coated with Ag / AgCl is seen. It is inserted into the system of the present invention, and also wirelessly acquires signals obtained by using a Bluetooth to enable electrocardiogram measurement during patient transport or exercise, such as a computer (PC) or an ultra mobile PC or wrist-type display device ( It is configured to monitor in real time on LCD, and it is configured to transmit data to remote doctors as needed. Therefore, the armband biometric terminal of the present invention can be easily and conveniently monitor the heart state of the patient in the hospital or out of the hospital, exercise in the gym, checking the health status of the athletes, or at home, If necessary, the CMDA EVDO transmits the patient's biosignal to doctors at remote emergency medical centers for immediate diagnosis and treatment.

In addition, since the armband type biometric terminal is worn on the upper arm, small size and light weight are required.

Therefore, the armband type biometric terminal of the present invention was made to be small and lightweight to be worn on the arm, and is made to be fixed to the upper arm using a fixing band.

In particular, in the conventional electrocardiograph, the electrocardiogram is acquired by directly attaching the electrode to the chest of the patient or using a forceps electrode coated with a gel on the wrist and the ankle. In such a case, in case of emergency, the ECG signal of the patient may not be obtained quickly, and the gel may cause discomfort to the patient.

The armband biometric terminal of the present invention can quickly and neatly obtain an electrocardiogram signal by contacting the upper arm of a patient using a coated Ag / AgCl electrode attached directly to the system.

 In addition, the patient can easily and conveniently monitor the state of the heart during the transfer of the patient in or out of the hospital, exercise in the gym, checking the health of the athletes, or even at home. The ECG signal obtained through the proposed system can be monitored in real time on a computer, a PC / ultra mobile PC or a LCD using Bluetooth wireless communication. In addition, if necessary, the CMDA EVDO transmits the patient's vital signals to doctors at remote emergency medical centers for immediate diagnosis and treatment.

In addition, the present invention provides a biometric terminal capable of measuring a bio-signal without being affected by a strong magnetic field generated during Magnetic Resonance Imaging (hereinafter referred to as MRI).

The technical problem to be achieved by the present invention is to provide an embedded-based armband biometric terminal that can be easily worn on the arm to measure the electrical activity of the heart, and transmit wirelessly.

Another technical problem to be achieved by the present invention is to measure the ECG signal in a minimum amount of time during an emergency, and also to monitor the ECG during patient transport or exercise, and to monitor in real time, if necessary The present invention provides a biometric terminal capable of transmitting data to a doctor.

Another technical problem to be achieved by the present invention is to enable immediate diagnosis and treatment by measuring the bio-signal quickly and easily by accurately and accurately measuring the bio-signals regardless of the place in case of heart disease patients or emergencies, small and lightweight armband type The present invention provides a biometric terminal.

Another technical problem to be achieved by the present invention is to provide an armband biometric terminal using a directly attached coated Ag / AgCl electrode without the need for a gel.

 Another technical problem to be achieved by the present invention is to provide a biometric terminal capable of measuring a bio-signal without being affected by a strong magnetic field generated during MRI work.

Hereinafter, the configuration and operation of the armband type biometric terminal according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an explanatory diagram for schematically illustrating an armband type biometric terminal according to an exemplary embodiment of the present invention, which includes a wireless electrocardiograph unit 100 and a fixed band unit 700.

The wireless electrocardiograph 100 is equipped with an Ag / AgCl electrode coated with a compact system for measuring electrocardiogram on the upper arm (top of the arm). The wireless electrocardiograph 100 is mounted in the middle of the fixed band.

The fixed band unit 700 is fixedly mounted in the middle of the wireless electrocardiograph 100, and is made to wind around the upper arm (top of the arm). That is, the wireless electrocardiograph 100 is completely in contact with the arm using the fixing band 700.

Armband biometric terminal of the present invention is attached to the upper part of the arm to measure the electrocardiogram, it is possible to apply the system quickly in an emergency situation, and also possible to exercise or daily life while wearing the armband biometric terminal of the present invention There is an advantage.

FIG. 2 is an explanatory diagram for schematically illustrating an example of use of the armband biometric terminal of FIG. 1.

The electrocardiogram signal obtained through the armband biometric terminal of the present invention can be monitored in real time on a computer or a PC / ultra mobile PC or wrist type display device (LCD) using Bluetooth wireless communication. In addition, if necessary, the patient's vital signs can be transmitted to the central emergency medical center remotely via a wireless communication network (CMDA EVDO) for immediate diagnosis and treatment.

3 is a schematic configuration diagram of the armband type biometric terminal of FIG. 1, which includes an ECG electrode 110, an ECG analog circuit unit 200, a digital control unit 400, and a Bluetooth transmission module unit 500.

The ECG electrode 110 is an electrode for detecting ECG signals at the upper arm, and is composed of two signal electrodes RA and LA and one reference electrode LL, and these electrodes are coated Ag / AgCl electrodes. It is composed.

The ECG analog circuit unit 200 amplifies and filters the ECG signal received from the ECG electrode 110, converts it into a digital signal, and transmits the digital signal to the digital control unit 400. The ECG analog circuit unit 200 includes an analog preprocessor 210 and an A / D converter 300.

The analog preprocessor 210 amplifies, filters, and converts the ECG signals received from the ECG electrode 110 into digital signals. The analog preprocessor 210 includes a protection circuit 220, an induction circuit 230, a high pass filter 240, an amplifier 250, a low pass filter 260, and an offset circuit 270.

The A / D converter 300 converts the ECG received from the analog preprocessor 210 into a digital signal and transmits the digital signal to the digital controller 400. The A / D converter 300 may be configured as a 12-bit A / D converter.

The digital controller 400 removes 60 Hz noise, which is power supply noise, and high frequency components from the signal received from the A / D converter 300. The digital controller 400 may be configured as a microprocessor. The digital controller 400 includes a 60 Hz notch filter 410, a high frequency component remover 420, and a serial communication module (USART) 430.

The Bluetooth transmission module unit 500 transmits the signal received from the digital control unit 400 to a computer, a PC / ultra mobile PC, or a wrist type display device.

4 is a configuration diagram of the analog preprocessor of FIG. 3, wherein the analog preprocessor 210 includes a protection circuit 220, an induction circuit 230, a high pass filter 240, an amplifier 250, and a low pass filter 260. And an offset circuit 270.

The protection circuit 220 is a circuit that protects the electrocardiograph from being damaged even if a high voltage is applied to the input terminal of the electrocardiograph under certain conditions. The protection circuit 220 includes a gas discharge tube (neon tube) voltage limiting circuit element. A gas discharge tube is a device with a higher breakdown voltage and is considered an open circuit until the breakdown voltage is reached. Thereafter, i.e., when the voltage across the device is increased above the breakdown voltage, the device switches to a conducting state and maintains a voltage several V lower than the total breakdown voltage. Typical breakdown voltages for this device range from 50V to 90V, which is a very high input for most ECG amplifiers. In the present invention, one small neon tube is used for each electrode, and the resistance in the non-conducting state of the small neon tube is almost infinite so that it does not have a load effect on the electrode. In addition, the protection circuit 220 performs impedance matching and isolation between the ECG electrode 110 and the human body.

The induction circuit 230 is configured as a differential amplifier, and detects the ECG signal from the biosignal input through the protection circuit 220 from the two signal electrodes of the ECG electrode 110.

The high pass filter 240 removes low frequency noise due to movement (operation), base line drift, and the like from the ECG signal output from the induction circuit 230. The high pass filter 240 may constitute a high pass filter having a cutoff frequency of about 0.7 Hz.

The amplifier 250 amplifies the signal output from the high pass filter 240.

The low pass filter 260 removes high frequency noise from the signal output from the amplifier 250. As the low pass filter 260, a low pass filter having a cutoff frequency of about 45 Hz may be used.

The high pass filter 240 and the low pass filter 260 may remove high frequency noise such as EMG and low frequency noise such as baseline variation and 60 Hz power supply noise.

The offset circuit 270 is adjusted so as not to be offset from the signal output from the low pass filter 260.

FIG. 5 is an explanatory diagram schematically illustrating a transmission process of an armband biometric terminal of the present invention to FIG. 2 to a computer and a wrist display device using Bluetooth wireless communication.

The signal transmitted through the Bluetooth transmission module unit 500 of the armband type biometric terminal is received by the Bluetooth reception module 840 and transmitted to the wrist display device 850, or via a USB or RS232C (830) computer or wool. Transmitted to the PC / ultra mobile PC 820. The signal transmitted to the computer or the PC / ultra mobile PC 820 may be transmitted to a remote computer (doctor's computer) or the like through the CDMA EVDO USB modem 810. The CDMA-based wireless transmit / receive interface can be achieved through a tablet PC or an ultra mobile PC.

That is, the ECG signal measured at the upper arm is transmitted to the wrist display device via Bluetooth, so that the user can confirm the data acquired in real time. Alternatively, data can be saved and analyzed by transferring it to a Tablet PC or Ultra Mobile PC, and if necessary, CDMA 1X EV-DO transmits the patient's vital signs to a doctor at a remote emergency medical center for immediate diagnosis. And help to make it possible. The telecommunications transmitter sends a patient's ECG signal by connecting a USB-type CDMA modem or EV-DO mobile phone to the Ultra Mobile PC or PC. The receiving end (not shown) receives data transmitted by the transmitting end using ADSL.

6 is a block diagram of the digital control unit of FIG. 3 and includes a 60 Hz notch filter 410, a high frequency component removing unit 420, and a serial communication module (USART) 430.

The 60 Hz notch filter 410 removes 60 Hz noise, which is power supply noise, from the signal output from the A / D converter 300. The 60 Hz notch filter 410 uses an adaptive notch filter. The adaptive notch filter uses a sine wave and a cosine wave as reference signals, and 60 Hz power noise from an ECG signal including measured noise. Remove it.

The high frequency component remover 420 removes the high frequency component from the signal output from the 60 Hz notch filter 410 and outputs a smoothed signal. The high frequency component remover 420 may be configured as a moving average filter. In particular, the high frequency component removing unit 420 may be configured as an eight-point moving average filter, and the eight-point moving average filter is a method of setting the current sample value to an average value of eight points of the sample.

The serial communication module (USART) 430 converts the output signal of the high frequency component removing unit 420 into a serial signal so that the signal can be transmitted in series from the Bluetooth transmission module unit 500. To pass).

7 is a configuration diagram of the ECG electrode of FIG. 3.

The ECG electrode 110 is an electrode for detecting ECG signals at the upper arm, and is composed of two signal electrodes RA and LA and one reference electrode LL, and these electrodes are coated Ag / AgCl electrodes. It is composed. The ECG electrode 110 arranges the electrodes in a triangle, and the electrode in the middle becomes a reference electrode. In the present invention, the ECG signal can be obtained quickly and neatly by directly contacting the system with the upper arm of the patient using a directly attached coated Ag / AgCl electrode.

In general, when measuring ECG, electrode location includes standard bipolar limb leads, augmented unipolar limb leads, chest leads or Precordial leads. The standard limb induction is mainly used, which is obtained from electrodes attached to the left arm (LA), right arm (RA), and left leg (LL) based on the right leg (RL) as Lead I, II, and III as shown in FIG. It is the most basic ECG signal that can be. However, if more precise diagnosis is needed, use chest induction as well.

 In the present invention, the lead I was measured by attaching a triangular electrode to the upper arm as shown in FIG.

8 is a block diagram of the 60 Hz notch filter of FIG. 6.

In order to remove only 60Hz noise from the measured ECG signals, sine and cosine waves having a 60Hz frequency were used as reference signals, and a weight W ₁ (k) = [W _1,1 (k), W ₁ was applied to the reference signal. _{, 2} (k), W _{1, L-1} (k) ...], W ₂ (k) = [W _2,1 (k), W _2,2 (k), W _{2, L-1} ( k), ...] and subtract the reference signal from the measured ECG signal to calculate the error as shown in Equation (1).

Where d (k) is the measured ECG signal, W _i is the weight and X _i is the reference signal. e (k) is equal to the measured ECG signal minus the product of the weight and the acceleration signal. The adaptive algorithm compensates the weight until the error is the smallest, and the weight compensation equation is as shown in Equation 2.

은 μ (mu)값으로 스텝사이즈(step size)를 나타내는 상수이며, 이 값에 따라서 수렴속도가 결정된다. 본 발명에서는 μ값을 1/64 = 0.015625로 설정할 수 있다.here

Is a constant representing the step size in μ (mu), and the convergence speed is determined according to this value. In the present invention, the mu value can be set to 1/64 = 0.015625.

9 is a block diagram of a moving average filter of the high frequency component removing unit.

In order to remove the high frequency component noise in the high frequency component remover, an 8-point moving average filter as shown in FIG. 9 was used.

As shown in FIG. 9, the 8-point moving average filter is a filter having a non-recursive characteristic that performs filtering with only finite values of an input signal, as shown in Equation 3 below.

The FIR filter has a disadvantage in that the higher the order, the larger the time delay, but since it does not have a feedback component, the linear phase characteristic, that is, the waveform shape between the input and the output is well maintained and always stable.

FIG. 10 is an example of the measurement results of the 60 Hz notch filter and the high frequency component removing unit of FIG. 6, and FIG. 11 is an example of an enlarged measurement result of FIG. 10.

10A and 11A show an original signal graph of the A / D converter 300, and FIGS. 10B and 11B show a 60 Hz notch filter. An output signal graph of the filter 410, FIGS. 10C and 11C are graphs of output signals of a moving average filter of the high frequency component removing unit.

 10B and 11B show that the 60 Hz power supply noise is almost removed from the output ECG signal of the A / D converter 300 of FIGS. 10A and 11A. Able to know.

10C and 11C apply a moving average filter to the output signal of the 60 Hz notch filter 410 of FIGS. 10B and 11B, It can be seen that the signal is smoother because the high frequency noise is reduced than the signals of FIGS. 10B and 11B.

FIG. 12 is an example of obtaining an ECG signal with the ultra mobile PC of FIG. 2, and FIG. 13 is an example of communication using the CDMA modem of FIG. 2.

 CDMA-based wireless transmit / receive interfaces are available via Tablet PCs or Ultra Mobile PCs.

FIG. 15 is an example of a coated Ag / AgCl electrode and a general adhesive electrode of the ECG electrode of FIG. 3.

The coated Ag / AgCl electrode is smaller than the general adhesive electrode, and it is convenient because there is no need to use gel separately when mounting the electrode.

In addition, the present invention provides a biometric terminal capable of measuring a bio-signal without being affected by a strong magnetic field generated during magnetic resonance imaging (MRI).

Magnetic Resonance Image (MRI) devices are non-invasive devices that can acquire images of internal organs. However, the MRI of organs that move with the heart can cause poor image quality due to movement. The MRI acquires a single image by repeating several acquisitions. At this time, if the object of the image acquisition is not fixed and moves, noise occurs in the MR image. Therefore, gating imaging is generally used as a way to improve the quality of MRI. The gating imaging method is to acquire an image using a periodic pulse, that is, a gating pulse obtained mainly by an ECG signal or a blood flow waveform. If the image is acquired after a certain time after the pulse is applied, it is possible to remove the noise of the MR image generated from the movement of the organ. However, in the MRI room, not only a strong magnetic field but also a severe magnetic field change is caused by a strong high frequency pulse or a gradient magnetic field radiating to acquire an image from the MRI apparatus. This magnetic field change causes severe distortion in the ECG signal or blood flow signal measured for the gating imaging method, and as a result, accurate gating pulses are difficult to generate. In addition, when a general biosignal measurement system (commercial electrocardiograph) is used, noise is generated in the MR image by minute electromagnetic waves emitted from the system.

 Therefore, the armband type biometric terminal of the present invention described above includes an analog preprocessor 210, a digital controller 400, and the like, which minimizes distortion of the biosignal due to the magnetic field to generate an accurate gating pulse and affects the MR image. Can be minimized. In addition, in the armband type biometric terminal of the present invention, unlike a commercial system (electrocardiograph), an electrocardiogram measuring electrode (Ag / AgCl coated electrode) is inserted into the system to minimize distortion that may occur through the electrocardiograph lead. In the case of using a common electrode (adhesive electrode), the iron contained in the electrode may cause static magnetic field distortion, which may adversely affect the image, and the patient may be burned by a strong magnetic field. In addition, the armband biometric terminal of the present invention is a compact, lightweight system when used in the MRI device, it is attached to the upper arm of the patient to measure the ECG can be used simply and conveniently than conventional commercial systems.

 The present invention is not limited to the above described and illustrated in the drawings, and of course, more modifications and variations are possible to those skilled in the art within the scope of the following claims.

As described above, the present invention provides an embedded-based armband biometric terminal that can be easily worn on the arm to measure the electrical activity of the heart and can be transmitted wirelessly, and can measure the ECG signal in a minimum time during an emergency. In addition, electrocardiograms can be measured during patient transport or exercise, and can be monitored in real time, and data can be transmitted to a remote doctor as needed.

In addition, the armband type biometric terminal of the present invention can be immediately and accurately measured and transmitted from the medical staff quickly and accurately, regardless of the place in the event of heart disease patients or emergencies, it is small and light.

In addition, the armband biometric terminal of the present invention does not need to use a gel, and is convenient using a directly attached coated Ag / AgCl electrode.

 In addition, the armband biometric terminal of the present invention provides a biometric terminal capable of measuring a bio-signal without being affected by the strong magnetic field generated during the MRI operation.

Claims (14)

An ECG electrode 110 consisting of coated Ag / AgCl electrodes to detect an ECG signal at the upper arm; An ECG analog circuit unit 200 which amplifies, filters, and converts the signal detected from the ECG electrode 110 into a digital signal; A 60Hz notch filter 410, which is a power source noise and a high frequency component, is removed from the signal received by the ECG analog circuit unit 200, and includes at least a 60Hz notch filter 410 including an adaptive notch filter, wherein the adaptive notch filter is a sine wave. A digital control unit 400 configured to remove 60 Hz power supply noise from an electrocardiogram signal including noise using a cosine wave as a reference signal; In the armband-type biometric terminal consisting of; Bluetooth transmission module unit 500 for transmitting a signal received from the digital control unit 400 to a computer, a PC (ultra mobile PC) or a wrist-type display device; , The 60 Hz notch filter 410 weights the reference signal (W ₁ (k) = [W _1,1 (k), W _1,2 (k), W _{1, L-1} (k) ...] , W ₂ (k) = [W _2,1 (k), W _2,2 (k), W _{2, L-1} (k), ...]) and subtract the reference signal from the measured ECG signal. Given error (e (k))

Where d (k) is the measured ECG signal, W _i is the weight and X _i is the reference signal To obtain, Compensate for the weights until the error is the smallest

(here

Is a constant representing the step size in μ (mu), and the convergence speed is determined according to this value, where μ is set to 1/64 = 0.015625. Armband biometric terminal, characterized in that for compensation according to. delete Armband-type biometric terminal having a brachial wireless electrocardiograph to measure the electrocardiogram through the ECG electrode 110 in the upper arm (top of the arm), and outputs through the Bluetooth transmission module unit 500; A wrist-type display device 850 having a Bluetooth reception module 840 for receiving and displaying an output signal of the Bluetooth transmission module 500 of the armband type biometric terminal; A computer or an Ultura mobile personal computer (PC / ultra mobile PC) for receiving the output signal of the Bluetooth transmission module unit 500 of the armband type biometric terminal via USB or RS232C; Armband type biometric terminal in a biometric system consisting of; CDMA EVDO USB modem for transmitting a signal transmitted to the computer or Ultura mobile personal computer to a remote computer (doctor's computer) An ECG analog circuit unit 200 which amplifies, filters, and converts the signal detected from the ECG electrode 110 into a digital signal; A 60Hz notch filter 410, which is a power source noise and a high frequency component, is removed from the signal received by the ECG analog circuit unit 200, and includes at least a 60Hz notch filter 410 including an adaptive notch filter, wherein the adaptive notch filter is a sine wave. A digital control unit 400 configured to remove 60 Hz power supply noise from an electrocardiogram signal including noise using a cosine wave as a reference signal; Equipped with The 60 Hz notch filter 410 weights the reference signal (W ₁ (k) = [W _1,1 (k), W _1,2 (k), W _{1, L-1} (k) ...] , W ₂ (k) = [W _2,1 (k), W _2,2 (k), W _{2, L-1} (k), ...]) and subtract the reference signal from the measured ECG signal. Given error (e (k))

Where d (k) is the measured ECG signal, W _i is the weight and X _i is the reference signal To obtain, Compensate for the weights until the error is the smallest

(here

Is a constant representing the step size in μ (mu), and the convergence speed is determined according to this value, where μ is set to 1/64 = 0.015625. Armband biometric terminal, characterized in that for compensation according to. The method according to any one of claims 1 to 3, The digital control unit 400, A high frequency component removing unit 420 configured to include a moving average filter and to output a smoothed signal by removing a high frequency component from a signal received from the 60 Hz notch filter 410; A serial communication module (USART) 430 for converting the output signal of the high frequency component removing unit 420 into a serial signal and transmitting the converted signal to the Bluetooth transmission module unit 500; Armband biometric terminal, characterized in that it further comprises. delete The method of claim 4, wherein The moving average filter is an arm point type biometric terminal, characterized in that an eight point moving average filter. The method according to any one of claims 1 to 3, The ECG electrode 110 is armband type biometric terminal, characterized in that consisting of two signal electrodes (RA, LA) and one reference electrode (LL). The method of claim 7, wherein The position of the two signal electrodes (RA, LA) and one reference electrode (LL) is located at each vertex of the triangle armband type biometric terminal. The method according to any one of claims 1 to 3, The ECG analog circuit unit 200, An analog preprocessor 210 for amplifying and filtering ECG signals received from the ECG electrode 110 and converting the ECG signals into digital signals; Armband type biometric terminal characterized in that it comprises an A / D conversion unit 300 for converting the ECG received from the analog pre-processing unit 210 to a digital signal transmitted to the digital control unit (400). The method of claim 9, The analog preprocessor 210 A gas discharge tube (neon tube) having a voltage limiting circuit element, a protection circuit 220 which protects the electrocardiograph from being damaged due to high voltage being applied to the input terminal of the electrocardiograph; An induction circuit 230 configured to detect an ECG signal from a biosignal input through the protection circuit 220 from two signal electrodes of the ECG electrode 110; A high pass filter 240 for removing low frequency noise from the ECG signal output from the induction circuit 230; An amplifier 250 for amplifying the signal output from the high pass filter 240; A low pass filter 260 for removing high frequency noise from the signal output from the amplifier 250; An offset circuit 270 which is adjusted so as not to be offset from a signal output from the low pass filter 260; Armband biometric terminal, characterized in that it comprises a. The method of claim 10, The high pass filter 240 is a high pass filter having a cutoff frequency of 0.7 Hz, The low pass filter 260 is an armband biometric terminal, characterized in that the low pass filter having a cutoff frequency of 45Hz. delete The method of claim 6, The eight point moving average filter is a armband biometric terminal, characterized in that the filter having a non-recursive characteristic that performs filtering with only finite values of the input signal. The method according to claim 1 or 3. The armband biometric terminal is an armband biometric terminal, characterized in that used for gating imaging method.

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