KR200267248Y1 - a portable electrocardiograph - Google Patents

Abstract

An electrode attached to the finger, differential amplification means for amplifying the differential signal input from the electrode, gain adjusting means for adjusting the gain of the amplified signal, key input means for inputting a user command, The A / D reference unit for providing the A / D conversion reference value, the low voltage checking means for checking the low voltage state, the battery for supplying power, the electrocardiogram waveform when the measurement start key is input, And control means for calculating the ST level, QRS time, arrhythmia, noise, etc., and transmitting the stored ECG waveform and the calculated value when the communication start key is input, the power adjusting means for adjusting the power supply, And a buzzer for generating sound, a display means for displaying an operation state and a measured value, and a transmission drive means for PC communication.

By capturing and analyzing the biosignal of the ECG waveform from the finger and drawing an electrocardiogram, anyone can conveniently check their own cardiac function without the need for professional knowledge, thereby enhancing convenience and personal health. Provide a portable electrocardiograph that can help with management.

Description

Portable electrocardiograph {a portable electrocardiograph}

The present invention relates to a portable electrocardiograph. More specifically, it captures and analyzes a biosignal signal of an ECG waveform from a finger, and then draws an electrocardiogram so that anyone can conveniently check their own cardiac function without any expert knowledge. The present invention relates to a portable electrocardiograph, which can improve convenience in use and at the same time help personal health care.

The foundation of electrocardiography was established by Dutch physiologist W. Eindhoven describing the heart's active currents for the first time in 1911 using an improved shunt ammeter for submarine telegraphy.

Since then, a winding ammeter and the like have also been used, but the initial ones are recorded directly by an ammeter and are collectively called a current electrocardiograph.

However, since the current electrocardiograph has a large and inconvenient device, a voltage electrocardiograph which indirectly amplifies the change in potential difference by means of an amplifying vacuum tube and draws it in an oscilloscope in accordance with the progress of the technology. Only was used.

Therefore, the current electrocardiograph for measuring the active current of the heart is rarely used, and a voltage electrocardiograph for amplifying and recording the active current of the heart is used. In addition, a CRT using a cathode ray oscilloscope, a vector ECC that curves a vector in two directions on a fluorescent plate by CRT, and a small ECG for a visit are used.

However, since the conventional electrocardiograph takes a method of attaching an electrode to a body, there is a problem in that it is very inconvenient to use it if there is no professional knowledge in use.

The purpose of this invention is to solve such a conventional problem, by capturing and analyzing the biosignal of the ECG waveform from the finger and drawing an electrocardiogram, anyone can conveniently check their own heart function without any professional knowledge. The present invention aims to provide a portable electrocardiograph, which can enhance the convenience of use and to help the individual's health care.

1 is a block diagram of a portable electrocardiograph according to an embodiment of the present invention.

2 is a detailed circuit diagram of a differential amplifier of a portable electrocardiograph according to an embodiment of the present invention.

3 is a flowchart illustrating a method of controlling a portable electrocardiograph according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

20: differential amplifier 30: gain adjuster

40: key input section 50: A / D reference value section

60: low voltage check unit 70: battery

80: microprocessor 90: power control unit

100: buzzer 110: display unit

120: transmission driver

As a means for achieving the above object, the constitution of the present invention includes an electrode attached to a finger, differential amplifying means for amplifying a signal input from the electrode, and a gain adjustment for adjusting the gain of the amplified signal. Means, a key input means for inputting a user command, an A / D reference value portion for providing an A / D conversion reference value, a low voltage check means for checking a low voltage state, a battery for providing a power source, Measures ECG waveform when the measurement start key is input and calculates and stores the pulse, ST level, QRS time, arrhythmia, noise, etc., and transmits the stored ECG waveform and calculated value when the communication start key is input. Means, power supply adjusting means for adjusting a power supply, a buzzer for generating sound, display means for displaying operating states and measured values, and for PC communication It comprise the new drive means.

Hereinafter, in order to explain in detail enough that a person having ordinary skill in the art can easily implement the present invention, the most preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. . Other objects, features, and operational advantages, including the purpose, operation, and effect of this design, will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred examples to help those skilled in the art from the various possible examples, and the technical spirit of the present invention is not necessarily limited or limited only by this embodiment. In addition, various changes, additions and changes are possible within the scope without departing from the technical spirit of the present invention, as well as other embodiments of the present disclosure.

As shown in FIG. 1, the configuration of a portable electrocardiograph according to an embodiment of the present invention is for amplifying a signal input from the electrodes 11 and 12 attached to a finger and the electrodes 11 and 12. The differential amplifier 20, the gain adjuster 30 for adjusting the gain of the amplified signal, the key input unit 40 for inputting a user's command, and the A / D conversion reference value. D reference value unit 50, the low voltage check unit 60 for checking the low voltage state, the battery 70 for providing power, and the electrocardiogram waveform is measured when the measurement start key is input, the pulse, ST level , And calculate and store the QRS time, arrhythmia, noise, and the like, the microprocessor 80 for transmitting the stored ECG waveform and the calculated value when the communication start key is input, and the power adjusting unit 90 for adjusting the power voltage supply. ), The buzzer 100 for generating sound, And a display unit 110 for displaying the operation state and the measured value, and a transmission driver 120 for the PC communication.

The material of the electrodes 11 and 12 is preferably a material containing tin, silver chloride or pure gold to satisfy biocompatibility.

As shown in Figure 3, the configuration of the control method of the portable electrocardiograph according to an embodiment of the present invention, the step of starting the operation (S10), the step of determining whether the measurement start key is input (S20), Measuring an ECG waveform when a measurement start key is input (S30); calculating a pulse rate, an ST level, a QRS time, an arrhythmia, noise, etc .; and displaying the calculated value (S40). S50), storing the measured ECG waveform and the calculated value (S60), determining whether the communication start key is input when the measurement start key is not input (S70), and the communication start key being input. And transmitting the stored ECG waveform and the calculated value (S80).

The operation of the portable electrocardiograph according to the embodiment of the present invention by the above configuration is as follows.

The device is operated by receiving power from the DC power battery 70. The microprocessor (MPU) 80 receives power directly from the battery and operates in a power saving mode, so that the current consumption of the battery is very small. In this state, only the key input can be received from the key input unit 40, and the LCD display unit 110 or other functions are not exhibited. When the power saving mode is terminated from the key input input from the key input unit 40 and enters the operation mode, the microprocessor (MPU) 80 signals the power adjusting unit 90 to supply power to all circuits other than the microprocessor 80. To supply.

After the power is supplied in this way, an operation is started by executing a program programmed and stored in the internal memory of the microprocessor 80 in the operation procedure shown in FIG. 3 (S10).

When the operation is started, the microprocessor 80 determines whether the measurement start key is input from the key input unit 40 (S20).

When the measurement start key is input from the key input unit 40, the microprocessor 80 detects an electrocardiogram through the electrodes 11 and 12 attached to the user's finger, and thus the differential amplifier 20 and the gain adjusting unit 30. Measure the waveform from the input signal is processed while passing (S30).

In the present invention, the electrodes 11 and 12 attached to the right thumb and the thumb of the left hand and the differential amplifier 20 having a high input impedance to receive a small ECG signal input from the electrodes 11 and 12. Use As shown in FIG. 2, when U1, R1, R2, C1, U2, and R3, R4, C2 are configured, an input of a differential amplifier having a high input impedance can be made. Then U3, R5, R6, R7, R8 A differential amplifier with an amplification degree of C3 and C4 are the high frequency cutoff frequencies of this differential amplifier. It is intended to be a low pass filter. U4 and R9 / C5 are the low-pass frequencies of this differential amplifier. This is to be a high pass filter. After all, the differential amplifier used here is a bandpass filter and the band is the band of the ECG signal.

U5, R10, R11, and C6 of the gain adjusting section 30 are for inputting the appropriate voltage level to the A / D input section of the microprocessor 80. C6 is the high cutoff frequency It is intended to be a low pass filter.

The voltage level range of the A / D input unit of the microprocessor 80 is determined by the A / D reference unit 50, and the highest level and range are set differently for each microprocessor.

Next, the microprocessor 80 calculates the pulse, ST level, QRS time, arrhythmia, noise, and the like from the signal input from the gain adjuster 30 (S40), and displays the calculated value as described above. After displaying to the outside through (S50), the measured ECG waveform and the calculated value are stored in the internal memory (S60).

On the other hand, when the measurement start key is not input from the key input unit 40, the microprocessor 80 determines whether the communication start key is input (S70).

When the communication start key is input from the key input unit 40, the microprocessor 80 transmits the stored ECG waveform and the calculated value to a PC (not shown) by using a transmission driver 120 such as an RS232C driver ( S80).

In other words, the ECG signal input to the A / D input unit of the microprocessor 80 is performed inside the microprocessor 80 in which a calculation method is programmed, and accordingly, pulse, ST level, QRS time, arrhythmia, noise, Calculate the digital filtered ECG waveform, and each information pulse, ST level, QRS time, arrhythmia, noise, digital filtered ECG waveform, etc. are calculated according to the necessity of communication within the microprocessor (eg UART, SPI, USB). Etc.) and the transmission driver 120 transmits the data to another device such as a PC.

The buzzer control output of the microprocessor 80 and the buzzer 100 are used as means for producing sound in operating the apparatus.

The low voltage checking unit 60 checks the voltage of the battery 70 because the device uses the power of the battery 70.

Therefore, the user can carry an electrocardiogram for each person to check the physical abnormality, and in general, by capturing and analyzing the biosignal of the ECG waveform and drawing the electrocardiogram, anyone can conveniently use his or her own heart function without any professional knowledge in use. You can check your health status.

As described above, in the embodiment of the present invention, by drawing the electrocardiogram after capturing and analyzing the biosignal of the ECG waveform from the finger, anyone can conveniently check their own cardiac function without the expert knowledge It is possible to provide a portable electrocardiograph with an effect that can improve the convenience of use and help the individual's health care. This effect of the present invention can be used in a variety of applications in the field of electrocardiography without departing from the scope of the technical idea of the present invention.

Claims (1)

Electrodes 11 and 12 attached to the finger, A differential amplifier 20 for amplifying a signal input from the electrodes 11 and 12; A gain adjusting unit 30 for adjusting the gain of the amplified signal; A key input unit 40 for inputting a user command, An A / D reference value unit 50 for providing an A / D conversion reference value, A low voltage checking unit 60 for inspecting a low voltage state; A battery 70 for providing power, It measures the ECG waveform when the measurement start key is input and calculates and stores the pulse, ST level, QRS time, arrhythmia, noise, etc., and transmits the ECG waveform and the calculated value when the communication start key is input. Processor 80, A power adjusting unit 90 for adjusting a power supply voltage; A portable electrocardiograph comprising a buzzer (100) for generating sound, a display (110) for displaying an operation state and a measured value, and a transmission driver (120) for PC communication.