CN212489879U - Heart rate frequency measuring device based on combination of multi-wavelength light sources - Google Patents
Heart rate frequency measuring device based on combination of multi-wavelength light sources Download PDFInfo
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- CN212489879U CN212489879U CN202020043167.7U CN202020043167U CN212489879U CN 212489879 U CN212489879 U CN 212489879U CN 202020043167 U CN202020043167 U CN 202020043167U CN 212489879 U CN212489879 U CN 212489879U
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Abstract
The utility model discloses a rhythm of heart is measuring device frequently based on multi-wavelength light source is united, the device include the shell with set up in inside memory of shell, the same light source of two or more than two luminous frequency, photosensitive member, display module and physiological signal processing circuit. The utility model discloses can only use multiple light source to shine human reflection signal measurement rhythm of the heart, practice thrift the cost, convenient and practical.
Description
Technical Field
The invention belongs to the field of photoelectric sensors, and particularly relates to a heart rate measuring device 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.
SUMMERY OF THE UTILITY MODEL
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.
The invention has the beneficial effects that: the utility model discloses can only use multiple light source to shine human reflection signal measurement rhythm of the heart, practice thrift the cost, convenient and practical.
Drawings
Fig. 1 is a block diagram of an embodiment of the apparatus of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, 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.
The heart rate measurement steps using the device are as follows:
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;
s2: collecting PPG (photoplethysmography) signals of two light sources after being reflected by human tissues at corresponding time slots by using a photosensitive component, wherein different proportions exist for motion interference and physiological signal components in the PPG signals measured by the light sources with different wavelengths; 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: 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 utility model discloses can only use multiple light source to shine human reflection signal measurement rhythm of the heart, practice thrift the cost, 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 (6)
1. A heart rate frequency measuring device based on combination of multi-wavelength light sources is characterized by comprising a shell, a memory, two or more light sources with the same light emitting frequency, a photosensitive component, a display module and a physiological signal processing circuit, wherein the memory, the two or more light sources, the photosensitive component, the display module and the physiological signal processing circuit are arranged in the shell; 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 frequency measurement device as claimed in claim 1, further comprising a power supply for supplying power to the memory, the light source, the photosensitive member, the display module and the physiological signal processing circuit.
3. The device for measuring heart rate and frequency based on combination of multiple wavelength light sources as claimed in claim 1, wherein the photosensitive member is a photodiode.
4. The device for measuring heart rate and frequency based on combination of multiple wavelength light sources as claimed in claim 3, wherein the sampling frequency of the back end of the photodiode is consistent with the light emitting frequency of the light source.
5. The device for measuring the heart rate and the frequency based on the combination of the multi-wavelength light sources as claimed in claim 1, wherein the photosensitive member is covered with a transparent light-transmitting layer.
6. The device of claim 1, wherein the reflected signal comprises a PPG signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020043167.7U CN212489879U (en) | 2020-01-09 | 2020-01-09 | Heart rate frequency measuring device based on combination of multi-wavelength light sources |
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| CN202020043167.7U CN212489879U (en) | 2020-01-09 | 2020-01-09 | Heart rate frequency measuring device based on combination of multi-wavelength light sources |
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| CN212489879U true CN212489879U (en) | 2021-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111616694A (en) * | 2020-01-09 | 2020-09-04 | 成都维客昕微电子有限公司 | Heart rate frequency measuring device and method based on multi-wavelength light source combination |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111616694A (en) * | 2020-01-09 | 2020-09-04 | 成都维客昕微电子有限公司 | Heart rate frequency measuring device and method based on multi-wavelength light source combination |
| CN111616694B (en) * | 2020-01-09 | 2024-01-30 | 成都维客昕微电子有限公司 | Heart rate frequency measuring device and method based on multi-wavelength light source combination |
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