KR102458280B1 - Portable artery’s heart rate measurement system based on Acoustic sensor - Google Patents

Abstract

The present invention relates to a portable pulse meter that measures the pulse with high accuracy even during activity based on the beating sound generated in the artery. It relates to a pulse meter for measuring accurate pulse in daily life by designing an instrument capable of collecting sound and removing noise through frequency filtering on hardware and firmware based on the measured signal.

Description

Portable artery's heart rate measurement system based on Acoustic sensor }

The present invention is based on the basic principle that a sound is generated by the pressure applied to the blood vessel when blood passes through the arterial blood vessel such as the radial artery of the wrist. It relates to a device that detects a pulse with high accuracy in real time even during activity by using a separate device design to prevent reception and loss of pulsatile sound.

Pulse means a change in intra-arterial pressure caused by contraction of the left ventricle of the heart and a wave generated in the artery wall due to this. (arrhythmia) can be regarded as a precursor of cardiovascular disease. In order to detect such abnormal symptoms of the pulse, the importance of real-time pulse measurement in daily life has emerged, and event-type (one-time) portable pulse measurement devices are being developed based on blood pressure measurement or oxygen saturation measurement methods. In the case of the existing pulse measuring device, 1. A handheld blood pressure monitor with a miniaturized cuff blood pressure monitor, or 2. PPG (Photoplethysmogram) method is used in most cases. However, 1. In the case of a cuff sphygmomanometer, artificial pressure is applied, which causes discomfort to the wearer, and the measured value is often higher than the actual pulse because the wearer recognizes the artificial pressure. 2. In the case of the PPG method, the LED uses the reflective properties of light in a specific wavelength band to detect blood passing through the blood vessels, so it is highly affected by the position of the sensor and the movement of the wearer. Due to this problem, it is very difficult for the existing portable pulse measuring devices to accurately measure a periodic pulse in real time during daily life, and it is difficult to trust the measured value.

The problem of such a portable pulse meter can be surprisingly easily solved, and it can be approached by the principle of pulse, which is performed for basic examination of patients in oriental medicine. In oriental medicine, the pulse is measured by detecting the wave generated when the blood flow generated by the heartbeat passes through the radial artery of the wrist. This vibration generates a beating sound for blood flow in the blood vessel, and when it is sensed, it is possible to secure the same accuracy as making a pulse. However, in the case of pulsating sound, it is very subtle, so it cannot be measured by a general method, and it can be used as a portable pulse measuring device that can measure pulsating sound by designing an acoustic sensor that has undergone a separate signal processing and a suitable instrument.

Patent Publication No. 10-2013-0016835 (February 19, 2013)

delete

An object of the present invention is to improve the problems in the prior art, and to measure the heartbeat generated in the arteries of the human body using an acoustic sensor to remove external noise and motion noise, thereby measuring the pulse in real time even during activity. The goal is to provide a portable arterial pulse meter that can detect tachycardia, bradycardia, and arrhythmias, which can be treated with a pulse by improving the accuracy of the heart rate.

The heartbeat sound-based portable pulse meter includes a measuring unit 400 composed of a plurality of acoustic sensors to improve signal accuracy and reception sensitivity, and the pulse sound measured simultaneously with the electrical insulation of the sensor and the upper skin of the artery (eg, wrist radial artery). The sensor fixing unit 500 for smooth signal measurement, the band 600 as a fixing device for wearing the device, and the sensor receive the measurement signal and wirelessly communicate with the main body and external terminals (smartphone, tablet, PC, etc.) It is composed of a main body circuit part (pulse measuring module: 200, 210) capable of this, a power supply part 300 for supplying power, and a display part 100 indicating the measured signal, and the main body circuit part is based on the measured arterial beating sound. It includes a filter for removing external noise and motion noise, and the acoustic sensor can arbitrarily adjust the distance between each sensor for accurate measurement, so that the vibration generated in the arteries can be detected more smoothly without being affected by the surrounding environment. It is characterized in that it is possible to measure in real time.

The heartbeat-based portable pulse meter of the present invention can selectively measure only a signal of a specific frequency by detecting a beating sound generated when blood passes through an artery of the body with an acoustic sensor, thereby eliminating external noise and motion noise generated from movement. Not only that, but also, the design of the sensor fixing part that can concentrate the sound improves the accuracy of real-time pulse measurement during activity, which has the effect of detecting tachycardia, bradycardia, and arrhythmia, which can be treated with a pulse.

1 is an exploded view of a portable pulse meter according to the present invention.
Figure 2 is a view of the various fixing mechanism and display form of the measuring device according to the present invention.
3 is a signal processing block diagram of the present invention.
4 is an actual measurement of a received signal according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the embodiments are for a clear understanding of the present invention, and the present invention is not limited thereto.

In order to improve the accuracy and reception sensitivity of the heartbeat sound-based portable pulse meter, the measuring unit 400 composed of a plurality of acoustic sensors (acoustic sensors) and the skin above the artery (eg wrist radial artery) and the sensor are electrically insulated and at the same time Acoustic sensor fixing unit 500 for smooth signal measurement by collecting measured beating sounds, band 600 as a fixing device for wearing the device, and receiving the measurement signal of the acoustic sensor, and receiving the measurement signal from the main body and external terminals (smartphone, tablet, PC, etc.) and a main body circuit (pulse measuring module: 200, 210) capable of wireless communication, a power supply unit 300 for supplying power, and a display unit 100 showing the measured signal, and the main body circuit unit is the measured signal. It includes a filter for removing external noise and motion noise based on the arterial beating sound, and the acoustic sensor can arbitrarily adjust the distance between each sensor for accurate measurement, so that the vibration occurring in the artery can be more smoothly detected, The portable pulse meter can be fixed and used not only on the wrist (radial artery) but also on all measurement sites (eg, chest heart, carotid artery, femoral artery, popliteal artery, posterior tibial artery, ulnar artery, peroneal artery, etc.) In addition, by using the acoustic sensor that measures the basic pulse and the pulse measurement module included in the main body circuit part, it can be made or linked to a generally used smart watch, and it is independent of the surrounding environment and is accurate in real time even during movement. You can measure your pulse.

1 is a diagram showing the shape of the portable pulse meter of the present invention, and since it measures the signal from the human artery, it is configured in the form of a band, watch, or belt that is easy to wear on the body. A number of acoustic sensors are included for this purpose, and through the combination of each acoustic sensor, it is possible to optimize the measurement signal even if the fixing mechanism of the sensor is not in the correct position due to the activity.

In addition, the measured signal can be stored in a separate storage device (internal memory, storage space of the external terminal), and through this, daily, weekly, monthly, etc. signal changes can be visualized in graphs, etc. to visualize tachycardia, bradycardia Various analyzes are possible by diversifying and comparing diseases that can be detected as abnormalities in the pulse signal, such as , arrhythmias.

The sensor unit including the acoustic sensor is located inside the sensor fixing unit manufactured separately within the device, so it does not cause inconvenience to wear. It is a form that can be removed, and a separate space is designed for the sensor to be located at the entrance of the sensor fixing part, so that loss of the received signal can be minimized by designing a vibration plate that is easy to transmit sound waves. And in the case of a fixing device for fixing the acoustic sensor to the wearing part, the material of the band is made of non-metal (plastic, rubber, etc.) Since it is not limited, it has the advantage of being able to use a band of various approaches.

In addition, this device has a circuit for wireless communication inside the main body, so it can communicate by itself with external devices (smartphone, tablet, PC, etc.) as well as its own monitor display. It is possible to use both personal and ubiquitous wireless communication methods such as Z-wave, and based on these functions, it is possible to display the measured signal using only an external device by maximizing the wearability without a monitor display on its own.

Both fixed and rechargeable batteries (battery) can be used for the internal power source of this device. The batteries used are alkaline batteries, manganese batteries, carbon zinc batteries, sodium sulfur batteries, lead storage batteries, nickel cadmium batteries, nickel hydride batteries, It may include any battery that can be used as a battery, such as a lithium ion battery and a lithium polymer battery.

In addition, the measuring device of the present invention is connected to the dedicated sunburst through wireless communication and based on the stored information, not only the pulse measurement but also the body temperature measurement through the temperature sensor, the electrocardiogram measurement through the ECG sensor, the respiratory rate measurement, etc. ECG sensor, temperature sensor, respiration sensor, etc.) can be added to measure biosignals, and by using the measured data, it is possible to observe the before and after symptoms of various diseases by diagnosing and analyzing diseases.

In addition, this measuring device is equipped with a charging terminal (eg C type USB) that can charge the power, so it can be charged and used when discharging. It can be used as big data because it can be used as big data because it can be combined with a biosignal indicating the state of a disease or combined with a device that measures various other biosignals to infer a correlation.

In addition, the pulse data transmitted to and stored in the server may further include an interface unit that can transmit data to an external medical institution or guardian, etc. through a wireless communication network.

100: monitoring display
200: main body circuit part (pulse measuring module)
210: wireless communication module
300: battery (power)
400: acoustic sensor (acoustic sensor)
500: acoustic sensor fixing part

Claims (6)

In the device for measuring biosignals,
Two or more acoustic sensors 400 that can receive a beating sound from an arterial blood vessel and can adjust the interval between each sensor; and
The sensor fixing part 500 which can collect the pulsation sound measured by the acoustic sensor 400 by electrical insulation of the upper artery skin and the sensor and is designed with a vibration plate; and
The acoustic sensor 400, the main body circuit parts 200 and 210 that can communicate and remove the noise; and the display unit 100 for displaying the measurement signal; and the power supply unit 300 for supplying power; and
An arterial beating sound-based portable pulse meter, comprising: a fixing mechanism 600 that can be fixed to the body;
The method of claim 1,
The portable pulse meter is an arterial beating sound-based portable pulse meter, characterized in that it can be used by fixing the acoustic sensor 400 to a measurement site through which an artery passes in the human body.
The method of claim 1,
The pulse meter can measure in real time and can be manufactured or linked to a smart watch.
3. The method of claim 1 or 2,
Arterial beating sound-based portable pulse meter, characterized in that it is possible to provide a tachycardia/bradycardia/arrhythmia signal by comparing and analyzing the signals measured from the acoustic sensor (400).
delete 3. The method of claim 1 or 2,
The portable pulse meter compares and analyzes the measured body temperature, electrocardiogram, and respiration rate bio-signals based on the pulse information stored in the dedicated server, thereby enabling observation and external transmission of diseases.

Images