CN111616694A - Heart rate frequency measuring device and method based on multi-wavelength light source combination - Google Patents
Heart rate frequency measuring device and method based on multi-wavelength light source combination Download PDFInfo
- Publication number
- CN111616694A CN111616694A CN202010022485.XA CN202010022485A CN111616694A CN 111616694 A CN111616694 A CN 111616694A CN 202010022485 A CN202010022485 A CN 202010022485A CN 111616694 A CN111616694 A CN 111616694A
- Authority
- CN
- China
- Prior art keywords
- heart rate
- light source
- combination
- physiological signal
- processing circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000001678 irradiating effect Effects 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims description 3
- 238000009532 heart rate measurement Methods 0.000 claims 2
- 238000013186 photoplethysmography Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
- A61B5/02427—Details of sensor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
-
- 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
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
Abstract
The invention discloses a heart rate measuring device and method based on combination of multi-wavelength light sources. The heart rate measuring device can measure the heart rate by only using the reflection signals of various light sources irradiating the human body, saves the cost, and is convenient and practical.
Description
Technical Field
The invention belongs to the field of photoelectric sensors, and particularly relates to a heart rate measuring device and method based on combination of multiple wavelength light sources.
Background
Most photoelectric heart rate sensors on the market today measure the PPG (photoplethysmography) signal of the user using a single light source, such as green or infrared, and then, in combination with a G-sensor (three-axis accelerometer) or motion sensor, etc., estimate the dynamic or static heart rate of the user. The existing photoelectric heart rate sensor has the following problems:
1) the heart rate is calculated mainly by the measuring signal provided by the monochromatic light source;
2) the need to estimate the motion state with reference to the data provided by the motion sensor increases the overall cost of the heart rate sensor.
Disclosure of Invention
The invention aims to provide a heart rate measuring device and method based on combination of multi-wavelength light sources, aiming at the defects of the prior art.
A heart rate measuring device based on combination of multi-wavelength light sources comprises a shell, a memory arranged in the shell, two or more light sources with the same light emitting frequency, a photosensitive component, a display module and a physiological signal processing circuit; the light source and the photosensitive surface of the photosensitive part are positioned on the same plane, the photosensitive part is connected with the physiological signal processing circuit and the memory, and the display module is connected with the physiological signal processing circuit; the photosensitive component is used for collecting a reflection signal of the light source after passing through human tissue; the memory is used for storing the reflected signal collected by the photosensitive component; the physiological signal processing circuit is used for calculating the heart rate according to the reflection signals collected by the photosensitive component, and the display module is used for displaying the heart rate calculated by the physiological signal processing circuit.
Furthermore, the device also comprises a power supply which is used for supplying power to the memory, the light source, the photosensitive component, the display module and the physiological signal processing circuit.
Further, the photosensitive member is a photodiode.
Furthermore, the sampling frequency at the rear end of the photodiode is consistent with the light emitting frequency of the light source.
Further, the photosensitive member is covered with a transparent light-transmitting layer.
Further, the reflected signal comprises a PPG signal.
A heart rate measuring method based on combination of multi-wavelength light sources comprises the following steps:
s1: irradiating human tissues by two or more light sources with consistent light emitting frequency, wherein the light emitting time is far shorter than the interval between two times of light-on, so that each light source emits light on the same frequency and different time slots;
s2: collecting signals of each light source after being reflected by human tissues at corresponding time slots by using a photosensitive component;
s3: completely stripping out the motion interference signal and the physiological signal in a time domain or a frequency domain;
s4: the heart rate is derived from the physiological signal.
The invention has the beneficial effects that: the heart rate can be measured by only using the reflection signals of various light sources to irradiate the human body, so that the cost is saved, and the device is convenient and practical.
Drawings
FIG. 1 is a block diagram of an embodiment of the apparatus of the present invention.
Fig. 2 is a block flow diagram of the present invention.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1-2, a heart rate measuring device based on combination of multi-wavelength light sources comprises a housing, and a power supply, a memory, a light source 1 and a light source 2 with the same light emitting frequency, a photosensitive component, a display module and a physiological signal processing circuit which are arranged inside the housing; the power supply is connected with the memory, the light source, the photodiode, the display module and the physiological signal processing circuit for supplying power, the light source and the photosensitive surface of the photosensitive part are positioned on the same plane, the photosensitive part is connected with the physiological signal processing circuit and the memory, and the display module is connected with the physiological signal processing circuit; the photosensitive component is used for collecting PPG signals of a light source after passing through human tissues; the memory is used for storing the reflected signal collected by the photosensitive component; the physiological signal processing circuit is used for calculating the heart rate according to the reflection signals collected by the photosensitive component, and the display module is used for displaying the heart rate calculated by the physiological signal processing circuit.
The physiological signal processing circuit filters the acquired signal A, B through a band-pass filter with a pass-band frequency of 0.5 Hz-4 Hz, the CPU is used for solving a correlation coefficient of the signal A, B in a period of time, then the signal A, B is subjected to normalization processing, and after the signals A, B subjected to normalization processing are mutually deducted, the heart rate is obtained through zero-crossing detection processing.
The sampling frequency at the rear end of the photodiode is consistent with the light emitting frequency of the light source, and the photodiode is covered with a transparent euphotic layer.
A heart rate measuring method based on combination of multi-wavelength light sources comprises the following steps:
s1: irradiating human tissues by two light sources with consistent light emitting frequency, wherein the light emitting time is far shorter than the interval between two times of light-on, so that the two light sources emit light on the same frequency and different time slots; wherein, the light source 1 is green light, and the light source 2 is red light;
s2: collecting PPG (photoplethysmography) signals of two light sources after being reflected by human tissues at corresponding time slots by using a photosensitive component, and enabling the PPG signals to be a signal A and a signal B respectively; the acquired signals can be directly sent to a memory for storage for calculation and storage, and can also be directly transmitted to a physiological signal processing circuit for calculating the heart rate;
s3: the signal A, B is filtered by a band-pass filter, the pass-band frequency of the filter is 0.5 Hz-4 Hz, and the frequency comprises the motion frequency and the heart rate frequency of the human; solving for the correlation coefficient of the signal A, B over a length of time to be a; normalizing the signals A and B respectively according to the maximum value and the minimum value of the signals A and B in a period of time by A/(max (A) -min (A)), wherein max and min respectively represent the operation of taking the maximum value and the minimum value of the signal A, and the normalized signals are marked as A1 and B1; obtaining a subtracted signal C using a formula a 1-a × B1 = C, and obtaining a subtracted signal D using a1-C = D;
s4: in the signal C, the heart rate frequency power occupies a main component, and the heart rate frequency can be obtained by a zero-crossing detection method.
The heart rate measuring device can measure the heart rate by only using the reflection signals of various light sources irradiating the human body, saves the cost, and is convenient and practical.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A heart rate measuring device based on combination of multi-wavelength light sources is characterized by comprising a shell, a memory arranged in the shell, two or more light sources with the same light emitting frequency, a photosensitive component, a display module and a physiological signal processing circuit; the light source and the photosensitive surface of the photosensitive part are positioned on the same plane, the photosensitive part is connected with the physiological signal processing circuit and the memory, and the display module is connected with the physiological signal processing circuit; the photosensitive component is used for collecting a reflection signal of the light source after passing through human tissue; the memory is used for storing the reflected signal collected by the photosensitive component; the physiological signal processing circuit is used for calculating the heart rate according to the reflection signals collected by the photosensitive component, and the display module is used for displaying the heart rate calculated by the physiological signal processing circuit.
2. The multi-wavelength light source combination-based heart rate measurement device of claim 1, further comprising a power supply for powering the memory, the light source, the photosensitive member, the display module and the physiological signal processing circuit.
3. The device for measuring the heart rate based on the combination of the multiple wavelength light sources as claimed in claim 1, wherein the photosensitive member is a photodiode.
4. The device for measuring the heart rate based on the combination of the multiple wavelength light sources as claimed in claim 3, wherein the sampling frequency of the rear end of the photodiode is consistent with the light emitting frequency of the light source.
5. The device for measuring the heart rate based on the combination of the multiple wavelength light sources as claimed in claim 1, wherein the photosensitive member is covered with a transparent light-transmitting layer.
6. The multi-wavelength light source combination-based heart rate measurement device of claim 1, wherein the reflected signal comprises a PPG signal.
7. A heart rate measuring method based on combination of multi-wavelength light sources is characterized by comprising the following steps:
s1: irradiating human tissues by two or more light sources with consistent light emitting frequency, wherein the light emitting time is far shorter than the interval between two times of light-on, so that each light source emits light on the same frequency and different time slots;
s2: collecting signals of each light source after being reflected by human tissues at corresponding time slots by using a photosensitive component;
s3: completely stripping out the motion interference signal and the physiological signal in a time domain or a frequency domain;
s4: the heart rate is derived from the physiological signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022485.XA CN111616694B (en) | 2020-01-09 | 2020-01-09 | Heart rate frequency measuring device and method based on multi-wavelength light source combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022485.XA CN111616694B (en) | 2020-01-09 | 2020-01-09 | Heart rate frequency measuring device and method based on multi-wavelength light source combination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111616694A true CN111616694A (en) | 2020-09-04 |
| CN111616694B CN111616694B (en) | 2024-01-30 |
Family
ID=72255113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010022485.XA Active CN111616694B (en) | 2020-01-09 | 2020-01-09 | Heart rate frequency measuring device and method based on multi-wavelength light source combination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111616694B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112587111A (en) * | 2020-12-01 | 2021-04-02 | 清华大学 | Physiological signal acquisition method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120271121A1 (en) * | 2010-12-29 | 2012-10-25 | Basis Science, Inc. | Integrated Biometric Sensing and Display Device |
| CN203943664U (en) * | 2013-08-14 | 2014-11-19 | 深圳市西微数字技术有限公司 | Wearable detection heart rate device |
| CN109645972A (en) * | 2019-01-08 | 2019-04-19 | 研和智能科技(杭州)有限公司 | It is a kind of for measuring the array arrangement circuit of heart rate and blood oxygen |
| CN212489879U (en) * | 2020-01-09 | 2021-02-09 | 成都维客昕微电子有限公司 | Heart rate frequency measuring device based on combination of multi-wavelength light sources |
-
2020
- 2020-01-09 CN CN202010022485.XA patent/CN111616694B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120271121A1 (en) * | 2010-12-29 | 2012-10-25 | Basis Science, Inc. | Integrated Biometric Sensing and Display Device |
| CN203943664U (en) * | 2013-08-14 | 2014-11-19 | 深圳市西微数字技术有限公司 | Wearable detection heart rate device |
| CN109645972A (en) * | 2019-01-08 | 2019-04-19 | 研和智能科技(杭州)有限公司 | It is a kind of for measuring the array arrangement circuit of heart rate and blood oxygen |
| CN212489879U (en) * | 2020-01-09 | 2021-02-09 | 成都维客昕微电子有限公司 | Heart rate frequency measuring device based on combination of multi-wavelength light sources |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112587111A (en) * | 2020-12-01 | 2021-04-02 | 清华大学 | Physiological signal acquisition method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111616694B (en) | 2024-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9560995B2 (en) | Methods and systems for determining a probe-off condition in a medical device | |
| US10881310B2 (en) | Motion artifact mitigation methods and devices for pulse photoplethysmography | |
| JP6688877B2 (en) | Device and system for monitoring heartbeat related information of a subject | |
| CN104224144A (en) | Photoelectric plethysmography photoelectric detection sensor | |
| US20180303358A1 (en) | Vital signs sensor and method of measuring vital signs of a user | |
| JP2018519889A (en) | Photoelectric volume pulse wave recording device | |
| US20220142584A1 (en) | Low frequency noise improvement in plethysmography measurement systems | |
| Stojanovic et al. | A LED–LED-based photoplethysmography sensor | |
| KR102360034B1 (en) | Blood pressure measuring apparatus, wrist watch type terminal having the same, and method of measuring blood pressure | |
| US20200359941A1 (en) | Systems, devices, and methods for performing trans-abdominal fetal oximetry and/or trans-abdominal fetal pulse oximetry using independent component analysis | |
| CN111616694B (en) | Heart rate frequency measuring device and method based on multi-wavelength light source combination | |
| KR102360073B1 (en) | Blood pressure measuring apparatus, wrist watch type terminal having the same, and method of measuring blood pressure | |
| CN212489879U (en) | Heart rate frequency measuring device based on combination of multi-wavelength light sources | |
| CN103271744A (en) | Non-contact oxyhemoglobin saturation measuring method based on imaging device | |
| CN212592122U (en) | Step frequency measuring device based on combination of multi-wavelength light sources | |
| EP3110318A1 (en) | Optical vital signs sensor | |
| WO2014141293A2 (en) | A method and system for estimation of blood anylates | |
| CN111616716B (en) | Step frequency measuring device and method based on multi-wavelength light source combination | |
| JP6606965B2 (en) | Respiration measurement device, respiration measurement method, and program | |
| CN109009050B (en) | Anti-motion interference reflective pulse rate signal detection device based on optical method | |
| WO2017089479A1 (en) | Non-invasive human condition monitoring device | |
| CN103200858B (en) | Optical measurement device | |
| CN111166314A (en) | Heart rate measuring device and method based on combination of multi-wavelength light source and accelerometer | |
| KR101030442B1 (en) | Apparatus for measuring heart rate based earphone | |
| EP3716841B1 (en) | Cardiovascular monitoring using multiple sensors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |