CN210185571U - Parallel type signal detection structure of PPG sensor - Google Patents
Parallel type signal detection structure of PPG sensor Download PDFInfo
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- CN210185571U CN210185571U CN201920578417.4U CN201920578417U CN210185571U CN 210185571 U CN210185571 U CN 210185571U CN 201920578417 U CN201920578417 U CN 201920578417U CN 210185571 U CN210185571 U CN 210185571U
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Abstract
The utility model discloses a parallel signal detection structure of PPG sensor, which comprises a basal disc, a plurality of luminous elements and a plurality of photosensitive elements, wherein the luminous elements and the photosensitive elements are arranged on the basal disc; the plurality of light emitting members are linearly arranged to form a light emitting group, the plurality of light sensing members are linearly arranged to form a light sensing group, the light sensing group and the light emitting group are arranged in parallel, and the light sensing members receive light emitted by the light emitting members. The received PPG signal is effectively enhanced, the signal-to-noise ratio of the PPG signal is improved, and the utilization efficiency of light is improved.
Description
Technical Field
The utility model relates to a bio-signal sensor field especially relates to a PPG sensor's side by side type signal detection structure.
Background
The detection of human body motion heart rate by using a photoplethysmography (PPG) technology is an application of an infrared nondestructive detection technology in biomedicine. The heart rate is calculated from the obtained pulse waveform by utilizing a photoelectric sensor to detect the difference of the reflected light intensity after the absorption of blood and tissues of a human body, tracing the change of the volume of a blood vessel in a cardiac cycle.
Currently, photoelectric structures with single wavelength are mature in the market, for example, most heart rate photoelectric detection sensors adopt a single 520nm LED and photoelectric receiving tube combined structure, blood oxygen photoelectric detection sensors adopt a single 650nm LED and photoelectric receiving tube combined structure, and other wavelength photoelectric monitoring is still under search. The current technical means is difficult to realize the integration of the multi-wavelength photoelectric transceiving module at the chip level, and under the limitation of the condition, the correlation among various human physiological indexes has to be ignored, so that the medical value of the monitored physiological signals is limited, and the monitoring object range of the photoelectric sensor is also limited.
Meanwhile, the combined structure of the LED lamp and the photoelectric receiving tube of most of PPG photoelectric detection sensors in the current market has the problems of unreasonable optical structure design and low light energy utilization efficiency, so that the PPG signal intensity and effective signal components in the PPG signals received by the photoelectric receiving tube are low.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a parallel signal detection structure of a PPG sensor, which includes a base plate, and a plurality of light emitting elements and a plurality of light sensing elements disposed on the base plate; the plurality of light emitting members are linearly arranged to form a light emitting group, the plurality of light sensing members are linearly arranged to form a light sensing group, the light sensing group and the light emitting group are arranged in parallel, and the light sensing members receive light emitted by the light emitting members.
Each light emitting member emits light with a different wavelength, and each light sensing member is provided with a filter device for the different wavelength.
The light emitting piece is an LED lamp, and the light sensing piece is a photoelectric receiving tube.
Preferably, the plurality of photosensitive members are 2 photoelectric receiving tubes, the plurality of light-emitting members are 1 LED lamp, and the two photoelectric receiving tubes are arranged on one side of the LED lamp in a row.
The beneficial effects of the utility model reside in that: the structure can enhance the received PPG signal, improve the signal to noise ratio of the PPG signal and improve the utilization efficiency of light.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present solution.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
A parallel signal detection structure of a PPG sensor comprises a base plate, a plurality of light emitting parts and a plurality of light sensitive parts, wherein the light emitting parts and the light sensitive parts are arranged on the base plate; the plurality of light emitting members are linearly arranged to form a light emitting group, the plurality of light sensing members are linearly arranged to form a light sensing group, the light sensing group and the light emitting group are arranged in parallel, and the light sensing members receive light emitted by the light emitting members.
The photosensitive element group and the luminous element group are arranged in parallel at a certain distance, and the illumination intensity received by each photosensitive element in the photosensitive element group is the same, so that the subsequent analysis of photocurrent signals is facilitated, and more accurate human body physiological characteristic parameters are obtained.
Further, each of the light emitting members emits light at a different wavelength, and each of the light sensing members is provided with a filter device for the different wavelength. Aiming at the requirement of an acquisition scheme, the components of the luminous piece and the photosensitive piece under different wavelengths are configured.
Based on a multi-wavelength photoelectric integrated structure, a plurality of wavelength light sources and a photosensitive part with a plurality of wavelength filtering devices are integrated inside the photoelectric integrated structure, a plurality of physiological characteristics are synchronously monitored by utilizing the multi-wavelength photoelectric integrated structure, and the monitoring results are integrated to give a human physiological characteristic value with more medical value.
Preferably, the light emitting member is an LED lamp, and the light sensing member is a photo-receiving tube.
As shown in fig. 1, preferably, the plurality of photosensitive members are 2 photo-receiving tubes, the plurality of light-emitting members are 1 LED lamp, and the two photo-receiving tubes are arranged in a row at one side of the LED lamp. The LED lamp keeps a certain distance from the central position of the photoelectric receiving tube. The method can efficiently receive the skin reflected light signal and provide a better quality PPG signal.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (4)
1. A parallel signal detection structure of a PPG sensor is characterized by comprising a base plate, a plurality of light emitting parts and a plurality of light sensitive parts, wherein the plurality of light emitting parts and the plurality of light sensitive parts are arranged on the base plate; the plurality of light emitting members are linearly arranged to form a light emitting group, the plurality of light sensing members are linearly arranged to form a light sensing group, the light sensing group and the light emitting group are arranged in parallel, and the light sensing members receive light emitted by the light emitting members.
2. The PPG sensor parallel signal detection structure according to claim 1, wherein each light emitting element emits light with different wavelength, and each light sensing element is provided with a filter for different wavelength.
3. The PPG sensor parallel signal detection structure according to claim 1, wherein said light emitting element is an LED lamp and said light sensing element is a photo-receiver tube.
4. The parallel signal detection structure of the PPG sensor according to claim 1, wherein the set of photosensitive elements is 2 photo-electric receiving tubes, the set of luminous elements is 1 LED lamp, and the two photo-electric receiving tubes are arranged in a row at one side of the LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920578417.4U CN210185571U (en) | 2019-04-25 | 2019-04-25 | Parallel type signal detection structure of PPG sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920578417.4U CN210185571U (en) | 2019-04-25 | 2019-04-25 | Parallel type signal detection structure of PPG sensor |
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| Publication Number | Publication Date |
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| CN210185571U true CN210185571U (en) | 2020-03-27 |
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| CN201920578417.4U Active CN210185571U (en) | 2019-04-25 | 2019-04-25 | Parallel type signal detection structure of PPG sensor |
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- 2019-04-25 CN CN201920578417.4U patent/CN210185571U/en active Active
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Address after: No. 527, unit 1, building 10, poly champagne international, No. 77, Tianmu Road, hi tech Zone (West), Chengdu, Sichuan 610000 Patentee after: Chengdu weikexin Microelectronics Co.,Ltd. Address before: 610000, No. 6, 1, 1, Renhe street, 39 hi tech Zone, Sichuan, Chengdu Patentee before: Chengdu weikexin Microelectronics Co.,Ltd. |