KR20120057797A - Heart rate measurement device using optical pulse wave - Google Patents
Heart rate measurement device using optical pulse wave Download PDFInfo
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- KR20120057797A KR20120057797A KR1020100119300A KR20100119300A KR20120057797A KR 20120057797 A KR20120057797 A KR 20120057797A KR 1020100119300 A KR1020100119300 A KR 1020100119300A KR 20100119300 A KR20100119300 A KR 20100119300A KR 20120057797 A KR20120057797 A KR 20120057797A
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- Prior art keywords
- pulse wave
- heart rate
- dynamic noise
- volume pulse
- optical
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- 238000009532 heart rate measurement Methods 0.000 title claims abstract description 24
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- 238000000034 method Methods 0.000 claims abstract description 35
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- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 9
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- 238000004891 communication Methods 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 7
- 230000010349 pulsation Effects 0.000 description 5
- 230000036772 blood pressure Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
Abstract
The present invention relates to a portable heart rate measurement device that can be structurally simple and convenient heart rate measurement using light volume pulse wave in the heart rate measuring device using light volume pulse wave that can be worn at all times during daily life or exercise The present invention relates to a method and apparatus for minimizing heart rate measurement data distortion due to dynamic noise (dynamic noise) generated during exercise, which is a disadvantage of the heart rate measurement method using pulse wave.
The present invention also relates to an interface between the heart rate measuring device and a mobile device to measure and monitor the heart rate of a user in real time.
[Index]
PPG (photo-plethysmograph), light source, light-receiving part, dynamic noise, invasive method, non-invasive method, BPF (Band Pass Filtering), MIC terminal and cable, light source (Laser Diode, Photo Diode
Description
Recently, apnea during sleep due to atherosclerosis, hypertension, and sudden death due to stroke due to high protein and high fat food intake accumulate more frequently than in the past. Accordingly, the necessity of a device for continuously monitoring the health condition in daily life is increasing, and according to the development of the electronic medical device industry, devices for monitoring the health in daily life are continuously appearing one after another.
Biosignal measurement techniques for diagnosing abnormalities in the circulatory system can be classified into invasive and non-invasive methods. Invasive methods are to penetrate the skin, or insert measurement sensors and probes such as the esophagus, airways, urethra, and blood vessels to measure signals to be measured. These methods are inconvenient to the subject by inserting several probes into the human body of the subject. On the other hand, non-invasive method is a method that can minimize the discomfort and pain of the patient to measure by using a sensor instead of the probe to the human body such as electrodes, sensors, ultrasound. Through the development of non-invasive methods, the development of measurement technology, signal processing technology, wired / wireless communication, and multimedia technology, as well as the development of health-related bio signals only in a limited area, such as a hospital, are available in areas where there are no medical personnel such as doctors and nurses. Several methods are being introduced to enable continuous medical instrumentation through measurement, transmission and storage in space.
The waveform of the general light volume pulse wave generated by the heartbeat is divided into the DC component caused by skin, bone, tissue, venous and non-pulsated arterial blood, and the AC component changed by the pulsation of arterial blood, where the blood flow of blood vessels in the tissue Since the volume change is the same as the heart rate change, the heartbeat can be detected by extracting the AC signal caused by the pulsation of arterial blood. Non-invasive methods for detecting heart rhythm by extracting AC signals caused by pulsation of arterial blood include optical detection methods, electrical detection methods, and mechanical detection methods.
The electrical detection method is to measure the heart rate by attaching an electrode on the skin to measure the change in tissue electrical impedance or admittance. The heart rate measurement using the electrical detection method is performed for ischemic heart disease such as arrhythmias, angina pectoris, myocardial infarction, and atrium. Diagnosis of hypertrophy and enlargement of the ventricles is possible, but due to the nature of the device, it is inconvenient to constantly measure the heartbeat of an individual.
The mechanical pulsation method detects heart pulsation through pressure transducers such as piezoelectric elements, rossel salt application sensors, and semiconductor pressure sensors. Since the mounting position is limited to a specific part of the body (wrist, chest, etc.), there are disadvantages in that it is difficult to use variously. In addition, there is a disadvantage in that a constant sensor position must be corrected during an active exercise.
On the other hand, the optical detection method is a method that detects light having good correlation with hemoglobin in blood by irradiating arterial blood close to the skin, which is simple and convenient in structure but difficult to distinguish from dynamic noise generated during exercise or movement. There is this.
One of the non-invasiv methods for measuring heart rate is the method of measuring heart rate using optical volume pulse waves to limit the errors that can occur by estimating blood pressure as a single component of the extension of the vessel wall. It is possible to measure blood pressure more precisely by defining the blood pressure according to the signal, and studies on blood pressure estimation using only volume pulse using the reflected wave arrival time (ΔTDVP) without acquiring an ECG signal It's going on.
The present invention relates to a heart rate measurement device that is simple in structure and simple and convenient heart rate measurement using light volume pulse wave.
In addition, the present invention relates to a heart rate measuring apparatus utilizing light volume pulse wave that can be worn at all times during daily life or exercise.
The present invention also relates to a method and apparatus for minimizing heart rate measurement data distortion due to dynamic noise (dynamic noise) generated during movement, which is a disadvantage of the optical detection method.
The present invention also relates to a sensor utilizing a light volume pulse wave that can be worn at all times during daily life or exercise.
The present invention is a bio-signal measurement, transmission and storage for enabling the measurement of health-related bio-signal available only in a limited area such as a hospital, doctors, nurses, etc. A method and apparatus for storage.
The present invention is a control unit for selectively activating the signal input unit (sensor) and the comparison unit for removing the noise and the dynamic noise DB and the light source of the signal input unit and transmits the measured heart rate data to the interlocked mobile device The present invention relates to a heart rate measuring apparatus using a portable light volume pulse wave configured.
The present invention can be worn on a variety of body parts by a combination of a small sized light source (Laser Diode) and a light-receiving portion (Photo Diode), and also utilizes a portable light volume pulse wave that minimizes the noise to be used during exercise as well as daily life. It relates to a heart rate measuring device.
In addition, the present invention by setting and storing the dynamic noise generated by each exercise type to minimize the dynamic noise so that it can be used during exercise by separating the optical volume pulse wave and the dynamic noise measured during exercise to extract the optical volume pulse wave dynamic noise DB The present invention relates to a heart rate measurement device using a portable light volume pulse wave.
In addition, the present invention is to set the optical volumetric pulse wave measurement cycle (number of optical volumetric pulse waves to be measured before transmitting to the mobile device interlocked) and transmission period for each exercise type, and set the mixed signal mixed with the optical volume pulse wave and the dynamic noise If each BPF is performed while measuring a predetermined number of cycles, and the optical volume pulse wave cannot be extracted from the mixed signal on which the BPF is performed, the mixed signal on which the BPF is performed is deleted and the optical volume pulse wave is removed from the mixed signal on which the BPF is performed. The apparatus relates to a heart rate measuring apparatus using optical volume pulse wave, characterized in that after storing the extracted optical volume pulse wave, if it can be evicted, performing the above process by a predetermined period and quantity, and transmitting the averaged amount to the linked mobile device. .
It is possible to use in real-time telemedicine or u-Health field without the inconvenience or pain by utilizing the heart rate measuring device using optical volume pulse wave, a non-invasiv method that can be worn at all times during daily life or exercise. Do.
In addition, the present invention can be implemented at low cost by using a heart rate measurement method using a non-invasiv method of light volume pulse wave can provide a popular real-time health care system that can be used by everyone.
In addition, by linking the heart rate measurement device with a personal mobile device, it is possible to transmit real-time heart rate measurement data to a desired place, and can be used in parallel with not only the personal fitness field such as exercise but also the remote medical field.
1 is a block diagram of a heart rate measuring apparatus using a photo-plethysmograph (PPG)
2 is a block diagram of an example of a signal input unit of a heart rate measuring apparatus using a photo-plethysmograph (PPG)
Figure 3 is a flow chart for the function of the heart rate measurement device using a photo-plethysmograph (PPG)
[Figure 4] Flow chart for the heart rate measuring device function without using the DB
Hereinafter, with reference to the accompanying drawings and description will be described in detail the operating principle of the preferred embodiment of the present invention. However, the drawings and the following description shown below are for the preferred method among various methods for effectively explaining the features of the present invention, the present invention is not limited only to the drawings and description below.
In addition, preferred embodiments of the present invention to be carried out below are provided in each system functional configuration to efficiently describe the technical components constituting the present invention, or system functions that are commonly provided in the technical field to which the present invention belongs. The configuration will be omitted, and described mainly on the functional configuration to be additionally provided for the present invention.
1 is a block diagram of an apparatus 100 for measuring heart rate using a photo-plethysmograph (PPG).
The controller 105 stores information about an exercise type (walking, jogging, biking, skiing, etc.) in advance and allows a user to select and use an exercise type previously stored in the heart rate measuring apparatus 100. When the user selects a pre-stored exercise type from the mobile device 125 linked with the heart rate measuring apparatus 100 and transmits the pre-stored exercise type to the control unit 105, the control unit 105 uses the
The
FIG. 2 is a block diagram of an example of the
An exercise type such as walking does not include much noise in the light volume pulse wave compared to an exercise type having a lot of movement such as jogging or skiing. In addition, wearing the heart rate measuring device 100 on the ear or forehead portion is significantly less affected by the noise than wearing on the wrist or ankle. If the movement type or the heart rate monitor wearing position is not much movement as described above, the controller 105 uses the quantity of the
Figure 3 is a flow chart of the function of the heart rate measurement device using a photo-plethysmograph (PPG).
When the user selects an exercise type in a mobile device that is linked with the heart rate measuring device (300), the mobile device transmits information about the exercise type selected by the user to the heart rate measuring device controller and transmits the information about the exercise type. The received control unit completes the exercise preparation by supplying power to the light sources to be used among the light sources of the signal input unit (305). The heart rate measuring device measures the optical volume pulse wave at a predetermined period (310). It is determined whether the volumetric pulse wave is a general heartbeat signal without dynamic noise or a mixed signal containing dynamic noise but recognizable signal and whether the volumetric pulse wave includes dynamic noise (315). If the normal heartbeat signal is missing or if the noise is included but the signal is recognizable, the measured optical volume pulse wave is stored and (325) If the measured optical volume pulse wave is a mixed signal that is difficult to recognize due to dynamic noise, the pre-stored dynamic noise in the dynamic noise DB is stored. In comparison with the sample (355), the dynamic noise signal is removed from the mixed signal that is difficult to recognize, and converted into a recognizable optical pulse wave signal (360), and then stored in the control unit or transmitted to a pre-set mobile device. (325) Check whether there is an exercise end command in the mobile device linked with the heart rate measuring device (330) If the exercise end command is received (335) and ends the operation of the heart rate measuring device (345) If the exercise end command received If there is no (340), the optical volume pulse wave measurement process is repeatedly performed at each preset time period (310).
4 is a flow chart of a heart rate measurement device function without using a congested DB.
When the user selects an exercise type in the mobile device that is linked with the heart rate measuring device (400), the mobile device transmits information on the exercise type selected by the user to the heart rate control unit and transmits the information about the exercise type. The received control unit selects light sources to be used among the light sources of the signal input unit (405), and also calculates the optical volume pulse wave measurement period (the number of optical volume pulse waves to be measured before transmitting to the linked mobile device) and transmission period by motion type. (410) The heart rate measuring apparatus performs BPF while measuring the mixed signal of the optical volume pulse wave and the dynamic noise by a predetermined amount in a predetermined period (415), and the optical signal from the mixed signal that performs the BPF If the volumetric pulse wave cannot be evicted, the mixed signal on which the BPF is performed is discarded. If the optical volume pulse wave can be extracted from the mixed signal on which the BPF has been performed, the extracted optical volume pulse wave is stored, and the above-described procedure is performed by the final period and quantity, and averaged and transmitted to the interlocked mobile device.
Claims (5)
A comparator for removing the dynamic noise from the optical volume pulse wave acquired by the signal input unit and transmitting the same to the controller; And
According to the motion type selected by the user, the light source (signal of light source 1 or light source 2 or light source 3 or light source 1 to 3) that is optimal for the motion type among the light sources of the signal input unit is used. A control unit for transmitting the data from the storage and transmission unit to a mobile device that is interlocked in a storage or wired / wireless manner; And
Apparatus for measuring heart rate using optical pulse wave comprising a storage and transmission unit for wired / wireless communication with the mobile device linked to the heart rate measurement device
It stores and manages the data for the pre-set dynamic noise by exercise type or heart rate wearing position, and further comprises a dynamic noise DB for transmitting the pre-stored dynamic noise data according to the exercise type or heart rate wearing position to the comparator Heart rate measurement device using optical pulse wave
If the optical volume pulse wave is a mixed signal that is difficult to recognize because it contains dynamic noise, the optical volume pulse wave can be recognized by removing the dynamic noise signal from the mixed signal that is difficult to recognize in comparison with the previously stored dynamic noise samples in the dynamic noise DB. An apparatus for measuring heart rate using optical pulse wave, characterized in that it further comprises a comparator for converting the signal to a control unit and transmitting the signal to the control unit.
In order to realize heart rate measurement by various exercise types without using DB, the preliminary pulse wave pulse measurement period (number of optical pulse wave pulses to be measured before transmitting to linked mobile device) and transmission period are preset. The measuring apparatus performs BPF while measuring the mixed signal mixed with the optical volume pulse wave and the dynamic noise by a predetermined quantity in a predetermined period, and performs the BPF if the optical volume pulse wave cannot be extracted from the mixed signal on which the BPF is performed. If one mixed signal is deleted and the optical volume pulse wave can be extracted from the mixed signal which has been subjected to the BPF, the extracted optical volume pulse wave is stored, and the optical volume pulse wave measurement process is performed for a predetermined period and quantity, and then averaged. Heart rate measurement device using optical pulse wave, characterized in that for transmitting to the mobile device
The wired / wireless transmission method of the heart rate measurement device and the mobile device linked with the device includes Bluetooth, Wi-Fi, Zigbee wireless communication method and communication using MIC (Microphone) terminal and cable, serial communication, Ethernet, and USB. Heart rate measurement apparatus using optical volume pulse wave, characterized in that further comprising a storage and transmission unit including a wired communication method
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100119300A KR20120057797A (en) | 2010-11-29 | 2010-11-29 | Heart rate measurement device using optical pulse wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100119300A KR20120057797A (en) | 2010-11-29 | 2010-11-29 | Heart rate measurement device using optical pulse wave |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020100119324A Division KR20120057813A (en) | 2010-11-29 | 2010-11-29 | Heart rate measurement method using optical pulse wave |
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| Publication Number | Publication Date |
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| KR20120057797A true KR20120057797A (en) | 2012-06-07 |
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| KR1020100119300A KR20120057797A (en) | 2010-11-29 | 2010-11-29 | Heart rate measurement device using optical pulse wave |
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| KR (1) | KR20120057797A (en) |
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2010
- 2010-11-29 KR KR1020100119300A patent/KR20120057797A/en not_active Application Discontinuation
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