CN213551804U - Blood oxygen detection device and intelligent wearable equipment - Google Patents
Blood oxygen detection device and intelligent wearable equipment Download PDFInfo
- Publication number
- CN213551804U CN213551804U CN202021162566.1U CN202021162566U CN213551804U CN 213551804 U CN213551804 U CN 213551804U CN 202021162566 U CN202021162566 U CN 202021162566U CN 213551804 U CN213551804 U CN 213551804U
- Authority
- CN
- China
- Prior art keywords
- light
- light emitting
- emitting
- emitting unit
- emitting units
- 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.)
- Active
Links
Images
Abstract
The application provides a blood oxygen detection device and intelligent wearable equipment, wherein the blood oxygen detection device comprises a light emitting component and a light receiving component; the light-emitting assembly comprises a plurality of light-emitting units which jointly form a light-emitting array; the plurality of light-emitting units comprise at least one first light-emitting unit and at least two second light-emitting units, the at least one first light-emitting unit is of a central symmetrical structure or is symmetrically distributed by taking one first light-emitting unit as a center, the center of the whole at least one first light-emitting unit is superposed with the center of the light-emitting array, the at least two second light-emitting units are symmetrically arranged relative to the center of the light-emitting array, and the first light-emitting unit and the second light-emitting units are arranged at intervals; the light beam emitted by the light-emitting unit is vertically or approximately vertically emitted to a user; the light receiving part is used for receiving the emergent light and converting an optical signal of the emergent light into an electric signal. The application can improve the accuracy of the blood oxygen detection result.
Description
Technical Field
The application relates to the technical field of biological identification, especially, relate to a blood oxygen detection device and intelligent wearing equipment.
Background
Blood oxygen refers to the oxygen content in the blood, which is an important physiological parameter of the respiratory cycle.
The existing blood oxygen detection device comprises a light source and a photoelectric receiver, wherein the light source adopts two light emitting diodes which are arranged side by side and emit light with different wavelengths, the two light emitting diodes respectively and directly emit light beams to different positions of skin, the emitted light beams are reflected, absorbed and scattered in skin tissues and blood, optical signals reaching the photoelectric receiver are converted into electric signals, and the electric signals are processed to obtain the blood oxygen saturation.
However, the inventor found that the conventional blood oxygen detecting device has high requirements for the use environment, and not only needs to be in close contact with the skin of the user, but also requires that the skin tissue of the user is not too thick, and when the blood oxygen detecting device is in poor contact with the skin of the user or the skin tissue of the user is too thick, the detection result is easily inaccurate.
SUMMERY OF THE UTILITY MODEL
The application provides a blood oxygen detection device and intelligent wearing equipment can improve the accuracy of blood oxygen testing result.
In a first aspect, an embodiment of the present application provides a blood oxygen detection device, including:
a light emitting assembly and a light receiving part;
the light-emitting assembly comprises a plurality of light-emitting units which jointly form a light-emitting array; the plurality of light emitting units include at least one first light emitting unit and at least two second light emitting units;
the at least one first light-emitting unit is of a central symmetrical structure or is symmetrically distributed by taking one of the first light-emitting units as a center, the center of the whole at least one first light-emitting unit is coincided with the center of the light-emitting array, the at least two second light-emitting units are symmetrically arranged relative to the center of the light-emitting array, and the first light-emitting unit and the second light-emitting units are arranged at intervals, wherein the first light-emitting unit is used for emitting a first light beam with a first wavelength, the second light-emitting unit is used for emitting a second light beam with a second wavelength, and the first wavelength is different from the second wavelength;
the light emitting unit is a laser, or the light emitting unit comprises a light emitting diode and a collimating piece arranged on the side of the light emitting diode close to the user, so that the light beam emitted by the light emitting unit is emitted to the user in a direction perpendicular or approximately perpendicular to the skin of the user;
the light receiving part is used for receiving the first light beam passing through first emergent light behind the user and receiving the second light beam passing through second emergent light behind the user and receiving the light signal of the first emergent light and the light signal of the second emergent light are converted into electric signals for blood oxygen detection.
In a possible implementation manner, the first light emitting unit and the second light emitting unit are arranged at intervals along at least one arrangement direction, and the arrangement direction and the light emitting direction of the light emitting unit are perpendicular to each other.
In a possible implementation manner, the first light emitting unit and the second light emitting unit are arranged at intervals along a first arrangement direction and a second arrangement direction that are orthogonal to each other, and both the first arrangement direction and the second arrangement direction are perpendicular to the light emitting direction of the light emitting unit.
In one possible implementation manner, the first light emitting units and the second light emitting units are arranged in a matrix.
In a possible implementation manner, the light receiving part is disposed at one side of the light emitting assembly;
alternatively, the light receiving element is surrounded at the periphery of the light emitting assembly.
In a possible implementation manner, the device further comprises a light gathering piece; the light gathering piece is arranged on the light incidence side of the light receiving piece and used for gathering the first emergent light and the second emergent light at the position of the light receiving piece.
In a possible implementation manner, the light condensing element includes a lens, the lens faces the light receiving element, the light incident surface of the lens is a convex surface, and the light emergent surface is a plane.
In a possible implementation manner, the light gathering part includes a microlens array, and a side of the microlens array facing away from the light receiving part is a plane.
In a possible implementation manner, the microlens array and the light receiving part are of an integral structure.
In a possible implementation manner, the distance from the light emitting assembly to the light receiving element is greater than 4 mm and less than 20 mm.
In a second aspect, the present application provides an intelligent wearable device, including the blood oxygen detection apparatus described in the first aspect and any one of the possible implementation manners of the present application.
The application provides a blood oxygen detection device and intelligent wearing equipment, the blood oxygen detection device comprises a light emitting component and a light receiving component, the light emitting component comprises a plurality of light emitting units, light beams emitted by the light emitting units are emitted to a user in a direction vertical to or approximately vertical to the skin of the user, the transmission depth of the light beams emitted by the light emitting units in the skin is deeper, and the perfusion index of light signals received by the light receiving component is improved, so that the accuracy of blood oxygen detection results can be improved, furthermore, the plurality of light emitting units comprise at least one first light emitting unit and at least two second light emitting units, at least one first light emitting unit is in a central symmetrical structure or is distributed symmetrically by taking one first light emitting unit as a center, the whole center of the at least one first light emitting unit is coincided with the center of a light emitting array, and the first light emitting unit and the second light emitting units are arranged at intervals, the first light beams emitted by the first light emitting units and the second light beams emitted by the second light emitting units are uniformly distributed in space, so that the whole light beams emitted by all the first light emitting units and the whole light beams emitted by all the second light emitting units can emit to the positions, which are approximately the same as the skin of a user, and the first emergent light and the second emergent light are obtained after tissue processing at the positions, which are approximately the same as the human body, of the user. The blood oxygen detection device can reduce the requirement of the blood oxygen detection device on the use environment, and can still obtain an accurate blood oxygen detection result even under the condition that the skin contact of the blood oxygen detection device and a user is not good enough or the skin tissue of the user is too thick.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a first schematic structural diagram of an blood oxygen detection device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a blood oxygen detection device according to an embodiment of the present application;
fig. 3 is a first schematic structural diagram of a light emitting device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a light emitting device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a light emitting device according to an embodiment of the present disclosure;
fig. 6 is a third schematic structural diagram of an blood oxygen detection device according to an embodiment of the present application;
FIG. 7 is a top view of a blood oxygen detection device according to an embodiment of the present application;
FIG. 8 is a first schematic structural diagram of a light-collecting element according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a light collecting member according to an embodiment of the present application;
fig. 10 is a fourth schematic structural diagram of an blood oxygen detection device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of exemplary embodiments. As used herein, the singular forms "a", "an" and "the" include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Blood oxygen refers to the oxygen content in the blood, which is an important physiological parameter of the respiratory cycle. The existing blood oxygen detection device comprises a light source and a photoelectric receiver, wherein the light source adopts two light emitting diodes which are arranged side by side and emit different wavelengths, the two light emitting diodes respectively and directly emit light beams to different positions of skin, and the emitted light beams are received by the photoelectric receiver after being reflected, absorbed and scattered in skin tissues and blood. The existing blood oxygen detection device has high requirements on the use environment, needs to be in close contact with a wearer, can obtain an accurate measurement result under the condition that skin tissues cannot be too thick, and can cause inaccurate detection results when being worn loose or too thick, for example, when a user moves, the loose condition of the blood oxygen detection device is often caused, so that the inaccurate detection results are caused, and the user experience is influenced.
The technical scheme of the application aims to solve the problems in the prior art.
Fig. 1 is a schematic structural diagram of an blood oxygen detecting device according to an embodiment of the present invention, as shown in fig. 1, the blood oxygen detecting device 10 of the present invention includes: a light emitting assembly 101 and a light receiving part 102. The light emitting assembly 101 includes a plurality of light emitting units, which collectively form a light emitting array; the plurality of light emitting units include at least one first light emitting unit 1011 and at least two second light emitting units 1012, the at least one first light emitting unit 1011 is a central symmetric structure or is symmetrically distributed by taking one of the first light emitting units as a center, the center of the whole at least one first light emitting unit 1011 coincides with the center of the light emitting array, the at least two second light emitting units 1012 are symmetrically arranged relative to the center of the light emitting array, and the first light emitting unit 1011 and the second light emitting units 1012 are arranged at intervals, wherein the first light emitting unit 1011 is used for emitting a first light beam with a first wavelength, the second light emitting unit 1012 is used for emitting a second light beam with a second wavelength, and the first wavelength is different from the second wavelength. The light emitting unit is a laser, or the light emitting unit comprises a light emitting diode and a collimating element arranged on the side of the light emitting diode close to the user, so that the light beam emitted by the light emitting unit is emitted to the user in a direction perpendicular or approximately perpendicular to the skin of the user. The light receiving element 102 is configured to receive a first outgoing light of a first light beam after passing through a user, receive a second outgoing light of a second light beam after passing through the user, and convert an optical signal of the received first outgoing light and an optical signal of the received second outgoing light into an electrical signal for performing blood oxygen detection.
In the embodiment of the present application, the number of the first light emitting units 1011 is n, the number of the second light emitting units 1012 is m, n is a positive integer greater than or equal to 1, and m is a positive integer greater than 1. The n first light emitting units 1011 and the m second light emitting units 1012 together form a light emitting array. When the number of the first light emitting units 1011 is one, one first light emitting unit 1011 itself has a central symmetrical structure, and the center of one first light emitting unit coincides with the center of the light emitting array. When the number of the first light-emitting units 1011 is plural, the plural first light-emitting units 1011 are symmetrically distributed with one of the plural first light-emitting units as a center, and the center of the whole plural first light-emitting units 1011 coincides with the center of the light-emitting array. The m second light emitting units 1012 are symmetrically disposed with respect to the center of the light emitting array.
The first light emitting units 1011 and the second light emitting units 1012 are arranged at intervals, that is, n first light emitting units 1011 and m second light emitting units 1012 are arranged at intervals, specifically, in the preset arrangement direction, the first light emitting units 1011 and the second light emitting units 1012 are arranged adjacent to each other in sequence. For example, a first light-emitting unit, a second light-emitting unit, and so on are alternately arranged.
Under the arrangement mode, the plurality of light emitting units can enable first light beams emitted by the first light emitting units and second light beams emitted by the second light emitting units to be uniformly distributed in space, so that the whole light beams emitted by all the first light emitting units and the whole light beams emitted by all the second light emitting units can emit to the skin of a user at approximately the same position, and first emergent light and second emergent light are obtained after tissue treatment at the approximately same position of a human body.
In this embodiment, as shown in fig. 2, the first light emitting unit 1011 includes first light emitting diodes 201 and first collimating elements 202 disposed on the first light emitting diodes, where each first light emitting diode 201 is disposed adjacent to the user side, and one first collimating element 202 is disposed on the first light emitting diode 201. The second light emitting unit 1012 comprises second light emitting diodes 203 and second collimating elements 204 arranged on the user side of the second light emitting diodes, and one second collimating element 204 is correspondingly arranged on each second light emitting diode 203 close to the user side. The divergence angle of the first light beam emitted by the first light emitting diode 201 is reduced by the first collimating element 202 so that the first light beam is directed towards the user in a direction perpendicular or approximately perpendicular to the skin surface of the user, and the divergence angle of the second light beam emitted by the second light emitting diode 203 is reduced by the second collimating element 204 so that the second light beam is directed towards the user in a direction perpendicular or approximately perpendicular to the skin surface of the user. The first collimating element 202 and the second collimating element 204 may both be collimating lenses.
In another possible structure, the first light emitting unit 1011 is a first laser emitting a first light beam, and the second light emitting unit 1012 is a second laser emitting a second light beam. The light beam emitted by the laser can be directed towards the user in a direction perpendicular or approximately perpendicular to the skin surface of the user.
In another possible structure, the first light emitting unit 1011 includes a first light emitting diode 201 and a first collimating element 202 disposed on the user side of the first light emitting diode 201, and the second light emitting unit 1012 is a second laser.
In another possible configuration, the first light emitting unit 1011 is a first laser, and the second light emitting unit 1012 includes a second light emitting diode 203 and a second collimating element 204 disposed on the user side of the second light emitting diode 203.
The optical signal received by the light receiving element 102 is related to the volume change of the skin blood flow, and includes a direct current component and an alternating current component, wherein the alternating current component mainly reflects the absorption of the arterial blood. The ratio of the alternating current component to the direct current component is a perfusion index, and the larger the perfusion index is, the more accurate the detected blood oxygen result is. When the first and second light beams are directed toward the user in a direction perpendicular or approximately perpendicular to the skin surface of the user, the light travels deeper in the human tissue, the light more easily penetrates the region including the arterial blood vessels, and the light receiving element 102 receives more ac components, so that the perfusion index increases. When θ is equal to 0, the perfusion index is maximal, i.e. when the first and second light beams are directed towards the user in a direction perpendicular to the skin surface of the user.
The light emitting assembly 101 is connected to a control circuit, and the control circuit controls the n first light emitting units 1011 and the m second light emitting units 1012 to make the n first light emitting units 1011 and the m second light emitting units 1012 illuminate in a time-sharing manner. For example, in a first time period, the control circuit controls n first light emitting units 1011 to be turned on and controls m second light emitting units 1012 to be turned off; in the second time period, the control circuit controls the m second light emitting units 1012 to be turned on and controls the n first light emitting units 1011 to be turned off. The first time period and the second time period may be the same or different, and the embodiment of the present application is not particularly limited. For example, the first time period and the second time period are each 10 milliseconds.
The blood oxygen saturation is an important index of blood oxygen, and the blood oxygen saturation refers to oxyhemoglobin (HbO) in blood2) The ratio of the capacity of (c) to the capacity of deoxyhemoglobin (Hb). Oxygenated hemoglobin (HbO) in blood2) And deoxyhemoglobin (Hb) has unique absorption spectra in red and near infrared regions, has a higher absorption coefficient in the red region having a wavelength of 600nm to 800nm, and has a HbO in the near infrared region having a wavelength of 800nm to 1000nm2Due to oxygenated hemoglobin (HbO) in the blood2) And the absorption coefficient of the deoxyhemoglobin (Hb) to red light and near infrared light is different, so that the blood oxygen can be detected by the red light and the near infrared light. The first light beam may be red light and the second light beam may be near infrared light, or the first light beam may be near infrared light and the second light beam may be red light. For example, the first wavelength of the first light beam is 650nm and the second wavelength of the second light beam is 940 nm. It should be understood that the first light beam and the second light beam may also be light beams with other wavelengths, and the embodiments of the present application are not particularly limited.
The first light beam emitted to the skin is reflected, absorbed and scattered by human tissues and then emitted by the skin to obtain first emergent light, the second light beam emitted to the skin is reflected, absorbed and scattered by the human tissues and then emitted by the skin to obtain second emergent light, the first emergent light and the second emergent light are received by the light receiving part 102, the received optical signals of the first emergent light and the second emergent light are converted into electric signals for blood oxygen detection by the light receiving part 102, and the electric signals are processed by the processor to obtain blood oxygen.
The light emitting assembly in the embodiment of the application comprises a plurality of light emitting units, light beams emitted by the light emitting units are emitted to a user in a direction perpendicular or approximately perpendicular to the skin of the user, the light beams emitted by the light emitting units are transmitted to a deeper depth in the skin, the perfusion index of light signals received by the light receiving part is improved, and therefore the accuracy of blood oxygen detection results can be improved, furthermore, the plurality of light emitting units comprise at least one first light emitting unit and at least two second light emitting units, at least one first light emitting unit is of a central symmetrical structure or is symmetrically distributed by taking one first light emitting unit as a center, the center of the whole at least one first light emitting unit is coincided with the center of the light emitting array, and the first light emitting unit and the second light emitting units are arranged at intervals, so that the first light beams emitted by the first light emitting units and the second light beams emitted by the second light emitting units are evenly distributed in space, and then the whole light beams emitted by all the first light-emitting units and the whole light beams emitted by all the second light-emitting units can be emitted to the positions, which are approximately the same as the skin of the user, and the first emergent light and the second emergent light are obtained after the tissue processing at the positions, which are approximately the same as the human body, of the user. The blood oxygen detection device can reduce the requirement of the blood oxygen detection device on the use environment, and can still obtain an accurate blood oxygen detection result even under the condition that the skin contact of the blood oxygen detection device and a user is not good enough or the skin tissue of the user is too thick.
Next, a method of detecting blood oxygen saturation will be described in detail, taking blood oxygen saturation as an example.
The n first light emitting units 1011 may all be red lasers with a light emitting wavelength of 660nm, the first light beams are red light beams with a wavelength of 660nm, the m second light emitting units 1012 may all be near-infrared lasers with a light emitting wavelength of 940nm, and the second light beams are near-infrared light beams with a wavelength of 940 nm. In a first time period, the control circuit controls the n first light emitting units 1011 to be turned on and controls the m second light emitting units 1012 to be turned off, and the n first light emitting units 1011 emit a first light beam to the userThe receiving member 102 receives first outgoing light of the first light beam after passing through a user; in a second time period, the control circuit controls the m second light emitting units 1012 to be turned on and controls the n first light emitting units 1011 to be turned off, the m second light emitting units 1012 emit a second light beam to the user, and the light receiving part 102 receives a second emergent light of the second light beam after passing through the user. The light receiving element 102 photoelectrically converts the received first outgoing light and second outgoing light, generates an electric signal for performing blood oxygen saturation detection, the electric signal including a direct current component and an alternating current component, respectively, and the processor determines the blood oxygen saturation based on the electric signal. Specifically, the processor determines the blood oxygen saturation level SpO according to the following formula2：
SpO2＝A+BR，
Wherein A and B are both calibration constants, RedACAn alternating component, Red, of an electrical signal generated for the light receiving element from the received optical signal of the first outgoing lightDCFor the direct component of the electrical signal generated by the light receiving element according to the received optical signal of the first outgoing light, IRACAC component of electric signal generated for light receiving element according to received light signal of second emergent light, IRDCR is a characteristic value of blood oxygen saturation, and is a direct current component of an electric signal generated by the light receiving element according to the received optical signal of the second emergent light.
In general, the light absorption characteristics of bones, skins, and veins of the human body rarely change, and therefore the ratio IR of the direct current componentsAC/IRDCCan be considered as constant, the magnitude of the R value depends on the ratio Red of the AC componentsAC/RedDCThe size of (2).
In one possible implementation, the method for determining the ratio of the alternating current components includes the following steps:
step 1, filtering an original electric signal generated according to a received optical signal of first emergent light and an original electric signal generated according to a received optical signal of second emergent light;
step 2, determining a direct current component of an electrical signal generated by the received optical signal of the first emergent light, an alternating current component of the electrical signal generated by the received optical signal of the first emergent light, a direct current component of an electrical signal generated by the received optical signal of the second emergent light and an alternating current component of an electrical signal generated by the received optical signal of the second emergent light;
step 3, respectively carrying out frequency spectrum analysis on the alternating current component of the electric signal generated by the received optical signal of the first emergent light and the alternating current component of the electric signal generated by the received optical signal of the second emergent light to obtain corresponding first frequency energy distribution and second frequency energy distribution;
step 4, extracting the signal corresponding to the frequency with the maximum energy value from the first frequency energy distribution as the first pulse wave base signal, extracting the signal corresponding to the frequency with the maximum energy value from the second frequency energy distribution as the second pulse wave base signal,
step 5, the energy ratio of the first pulse base signal and the second pulse base signal is the ratio Red of the alternating current componentAC/RedDC。
The blood oxygen saturation can be obtained by the method.
As an embodiment of the present application, the light receiving element 102 may be a photoelectric conversion element, and specifically, the light receiving element 102 may be a photodiode, and may also include a plurality of photodiodes, and the plurality of photodiodes are arranged in an array. The plurality of photodiodes may be uniformly arranged in a rectangular shape, a circular shape, a diamond shape, an irregular shape, and the like. Compared with one photodiode, the photodiodes can receive more optical signals, so that the accuracy of the detection result of the hematogenous oxygen is further improved.
Due to oxygenated hemoglobin (HbO) in blood2) And the absorption coefficients of the deoxyhemoglobin (Hb) to red light and near infrared light are different, the first light emitting unit 1011 and the second light emitting unit 1012 respectively emit red light and near infrared light, and the blood oxygen is detected by the red light and the near infrared light.
Several possible arrangements of the first and second light emitting units are described in detail below.
As an embodiment of the present application, in an alternative structure, the first light emitting unit 1011 and the second light emitting unit 1012 are arranged at intervals along at least one arrangement direction, and the arrangement direction and the light emitting direction of the light emitting units are perpendicular to each other.
For example, as shown in fig. 3, the number of the first light emitting units 1011 is 3, the number of the second light emitting units 1012 is 2, and the first light emitting units 1011 and the second light emitting units 1012 are sequentially spaced from left to right in a direction perpendicular to the light emitting direction of the light emitting units.
In the embodiment of the application, the arrangement of the first light-emitting units and the second light-emitting units in one direction is more compact, so that the spatial distribution of the overall light beams emitted by all the first light-emitting units and the overall light beams emitted by all the second light-emitting units arranged in one direction is more uniform, the positions of the light beams emitted to the skin of a user are closer, and the arrangement direction is perpendicular to the light emitting direction of the light-emitting units, so that the accuracy of the blood oxygen detection result is further improved.
As an embodiment of the present application, in another alternative structure, the first light emitting unit 1011 and the second light emitting unit 1012 are arranged at intervals along a first arrangement direction and a second arrangement direction orthogonal to each other, and both the first arrangement direction and the second arrangement direction are perpendicular to a light emitting direction of the light emitting units. The first arrangement direction may be a transverse direction and the second arrangement direction may be a longitudinal direction; alternatively, the first alignment direction may be a longitudinal direction and the second alignment direction may be a transverse direction.
For example, as shown in fig. 4, the number of the first light emitting units 1011 is 1, the number of the second light emitting units 1012 is 4, and the 4 second light emitting units 1012 are respectively disposed outside the first light emitting units 1011 in the circumferential direction with the first light emitting units 1011 as the center, that is, the second light emitting units 1012 are respectively disposed on both sides of the first light emitting units 1011 in the first arrangement direction, and the second light emitting units 1012 are respectively disposed on both sides of the first light emitting units 1011 in the second arrangement direction.
In the embodiment of the application, in the area defined by the first arrangement direction and the second arrangement direction which are orthogonal to each other, the first light-emitting units and the second light-emitting units are arranged more compactly, so that the positions of the whole light beams emitted by all the first light-emitting units and the whole light beams emitted by all the second light-emitting units in the defined area, which are emitted to the skin of the user, are closer, and the accuracy of the blood oxygen detection result is further improved.
As an embodiment of the present application, in another alternative structure, the first light emitting units and the second light emitting units are arranged in a matrix.
For example, as shown in fig. 5, the number of the first light emitting units 1011 is 5, the number of the second light emitting units 1012 is 4, and the remaining 4 first light emitting units 1011 and 4 second light emitting units 1012 are sequentially arranged at intervals in the circumferential direction of the first light emitting units 1011 in a circumferential array with one of the first light emitting units 1011 as the center C.
In the embodiment of the application, the first light-emitting units and the second light-emitting units are arranged in an array mode, so that the positions of the first light-emitting units and the second light-emitting units are closer to each other in an area determined by a first arrangement direction and a second arrangement direction which are orthogonal to each other, the size of the whole light beams emitted by all the first light-emitting units is close to the size of the whole light beams emitted by all the second light-emitting units, and the light beams are emitted to the close positions of the skin of a user, and the accuracy of a blood oxygen detection result is further improved.
It should be understood that the distribution pattern of the first and second light emitting units 1011 and 1012 is not limited to the above.
Fig. 6 is a schematic structural diagram of a blood oxygen detecting device provided in the embodiment of the present application, and as shown in fig. 6, the device of the embodiment of the present application further includes a light blocking member 103, the light blocking member 103 is disposed between the light emitting assembly 101 and the light receiving element 102, and is used for blocking the light receiving element 102 from receiving the light beam without user processing, that is, the light blocking member 103 blocks the light receiving element 102 from receiving the light beam emitted from the light emitting assembly 101 to the light receiving element 102, so as to prevent the light beam without user processing from entering the light receiving element 102 and causing interference on the detection result.
In the embodiment of the present application, the light blocking member 103 may be implemented by using a light-impermeable material, and the light blocking member 103 has light absorption property and can absorb light beams irradiated onto the light blocking member 103. The cross-sectional shape of the light blocking member 103 may be a bar shape, a circle shape, a diamond shape, an irregular shape, and the like.
The embodiment of the application can reduce the intensity of the interference signal received by the light receiving part 102 by arranging the light blocking part 103, thereby further improving the accuracy of the blood oxygen detection result.
As an embodiment of the present application, the light receiving part 102 may be disposed at one side of the light emitting assembly 101, and accordingly, the light blocking member 103 is also disposed at one side of the light emitting assembly 101 and between the light emitting assembly 101 and the light receiving part 102. As shown in fig. 6, the light blocking member 103 and the light receiving member 102 are disposed in order from a side close to the light emitting assembly 101 to a side far from the light emitting assembly 101. The light receiving element 102 is disposed at one side of the light emitting module 101, which enables the reduction in size of the blood oxygen detecting apparatus.
The light receiving element 102 may also be arranged around the light emitting assembly 101, and correspondingly, the light blocking element 103 is also arranged around the light emitting assembly 101. As shown in fig. 7, the light emitting assembly 101 is surrounded by the light blocking member 103 and the light receiving member 102 in this order. The light receiving element 102 and the light blocking element 103 may be in the shape of a ring or a square around the light emitting assembly 101.
The light receiving element 102 is arranged around the light emitting component 101, so that the area of the light receiving signal received by the light receiving element 102 can be increased, and the light receiving element 102 can receive more light signals, thereby further improving the accuracy of the blood oxygen detection result.
With continued reference to fig. 6, the apparatus of the present embodiment of the application further includes a light collector 104. The light converging member 104 is disposed at the light incident side of the light receiving element 102, and converges the first outgoing light and the second outgoing light at the light receiving element 102. The light concentrating element 104 completely covers the light receiving element 102. The embodiment of the application can enable the light receiving part 102 to receive more light signals through the light gathering effect of the light gathering part 104, and improve the anti-interference capability of the blood oxygen detection device.
The installation mode of the light gathering part 104 may be direct attachment, injection molding, nanoimprint, casting, etc., and the specific installation mode is not taken as an improvement of the embodiment of the present application, which is not described again in the embodiment of the present application.
Fig. 8 is a first structural schematic diagram of the light concentrating element provided in the embodiment of the present application, and as shown in fig. 8, the light concentrating element 104 in the embodiment of the present application includes a lens, the lens faces the light receiving element 102, a light incident surface of the lens is a convex surface, and a light emitting surface of the lens is a plane surface. The lens may be a collimating microlens. The light incident surface of the lens, namely one surface facing the outside of the blood oxygen detection device, is set to be a convex surface, and the shape of the light incident surface cannot be limited by the inner space of the device, so that the convex surface can have a large radian to achieve a better light gathering effect and improve the anti-interference capability of the blood oxygen detection device.
As an embodiment of the present application, with continuing reference to fig. 8, the focal point f of the lens coincides with the central point c of the upper surface of the light receiving element 102, that is, the light receiving element 102 is disposed at the focal point of the lens, so as to further improve the light gathering effect of the light gathering element 104 and further improve the anti-interference capability of the blood oxygen detecting device.
Fig. 9 is a second structural schematic diagram of the light concentrating element according to an embodiment of the present application, and as shown in fig. 9, the light concentrating element 104 includes a microlens array, and a side of the microlens array facing away from the light receiving element 102 is a plane.
The microlens array has a plurality of microlenses protruding toward the light receiving element 102, and the light condensing effect of the microlens array is better than that of the lens. The side of the microlens array facing away from the light receiving element 102 is planar, i.e. the side of the microlens array facing the skin of the user is planar, so that soiling and dirt can be avoided and the cleaning of the microlens array can be maintained.
The microlens array and the light receiving element may be an integral structure. In some embodiments, the microlens array and the light receiving element 102 may be formed simultaneously by injection molding, for example, a polymethyl methacrylate (PMMA) or Polycarbonate (PC) is used to directly form the integrated microlens array and light receiving element 102 for installation.
As an embodiment of the present application, the distance between the light emitting assembly 101 and the light receiving element 102 is greater than 4 mm and less than 20 mm. As shown in fig. 10, the distance d between the light emitting element 101 and the light receiving element 102 refers to the distance between the edge of the light emitting element 101 close to the light receiving element 102 and the edge of the light receiving element 102 close to the light emitting element 101, and if the distance between the light emitting element 101 and the light receiving element 102 is less than or equal to 4 mm, the light receiving element 102 will receive more light transmitted from the skin surface layer; if the distance between the light emitting element 101 and the light receiving element 102 is greater than or equal to 20 mm, the intensity of the light signal received by the light receiving element 102 is reduced. By adjusting the position relationship between the light emitting component 101 and the light receiving element 102, the distance between the light emitting component 101 and the light receiving element 102 is larger than 4 mm and smaller than 20 mm, so that the light transmitted by the skin surface layer received by the light receiving element 102 is reduced, and the light receiving element 102 is ensured to receive more emergent light after skin treatment.
The embodiment of the application further provides intelligent wearable equipment, which comprises the blood oxygen detection device in any one of the above embodiments, and has the beneficial effects of any one of the above embodiments.
In the embodiment of the present application, the smart wearable device includes, but is not limited to, a bracelet and a smart watch.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (11)
1. A blood oxygen detection device, comprising:
a light emitting assembly and a light receiving part;
the light-emitting assembly comprises a plurality of light-emitting units which jointly form a light-emitting array; the plurality of light emitting units include at least one first light emitting unit and at least two second light emitting units;
the at least one first light-emitting unit is of a central symmetrical structure or is symmetrically distributed by taking one of the first light-emitting units as a center, the center of the whole at least one first light-emitting unit is coincided with the center of the light-emitting array, the at least two second light-emitting units are symmetrically arranged relative to the center of the light-emitting array, and the first light-emitting unit and the second light-emitting units are arranged at intervals, wherein the first light-emitting unit is used for emitting a first light beam with a first wavelength, the second light-emitting unit is used for emitting a second light beam with a second wavelength, and the first wavelength is different from the second wavelength;
the light emitting unit is a laser, or the light emitting unit comprises a light emitting diode and a collimating piece arranged on the side of the light emitting diode close to the user, so that the light beam emitted by the light emitting unit is emitted to the user in a direction perpendicular or approximately perpendicular to the skin of the user;
the light receiving part is used for receiving the first light beam passing through first emergent light behind the user and receiving the second light beam passing through second emergent light behind the user and receiving the light signal of the first emergent light and the light signal of the second emergent light are converted into electric signals for blood oxygen detection.
2. The device of claim 1, wherein the first light emitting unit and the second light emitting unit are arranged at intervals along at least one arrangement direction, and the arrangement direction and the light emitting direction of the light emitting units are perpendicular to each other.
3. The device of claim 2, wherein the first light emitting unit and the second light emitting unit are arranged at intervals along a first arrangement direction and a second arrangement direction orthogonal to each other, and the first arrangement direction and the second arrangement direction are both perpendicular to a light emitting direction of the light emitting unit.
4. The device of claim 3, wherein the first and second light emitting units are arranged in a matrix.
5. The apparatus of claim 1, wherein the light receiving part is disposed at one side of the light emitting assembly; alternatively, the light receiving element is surrounded at the periphery of the light emitting assembly.
6. The device of claim 1, further comprising a light gathering member; the light gathering piece is arranged on the light incidence side of the light receiving piece and used for gathering the first emergent light and the second emergent light at the position of the light receiving piece.
7. The apparatus of claim 6, wherein the light converging element comprises a lens facing the light receiving element, the light incident surface of the lens is convex, and the light emergent surface is planar.
8. The apparatus of claim 6, wherein the light gathering element comprises a micro lens array, and a side of the micro lens array facing away from the light receiving element is a plane.
9. The apparatus of claim 8, wherein the micro-lens array and the light receiving element are a unitary structure.
10. The apparatus according to any one of claims 1 to 9, wherein the distance from the light emitting assembly to the light receiving element is greater than 4 mm and less than 20 mm.
11. An intelligent wearable device, characterized by comprising the blood oxygen detection device according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021162566.1U CN213551804U (en) | 2020-06-19 | 2020-06-19 | Blood oxygen detection device and intelligent wearable equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021162566.1U CN213551804U (en) | 2020-06-19 | 2020-06-19 | Blood oxygen detection device and intelligent wearable equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213551804U true CN213551804U (en) | 2021-06-29 |
Family
ID=76522677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021162566.1U Active CN213551804U (en) | 2020-06-19 | 2020-06-19 | Blood oxygen detection device and intelligent wearable equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213551804U (en) |
-
2020
- 2020-06-19 CN CN202021162566.1U patent/CN213551804U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3964127A1 (en) | Wearable device and photoelectric pulse sensor component | |
| TWI594445B (en) | Opto-electronic modules including features to help reduce stray light and/or optical cross-talk | |
| US9883824B2 (en) | Detecting device | |
| EP2326239B1 (en) | Protrusion for improving spectroscopic measurement of blood constituents | |
| KR102033914B1 (en) | method for measuring blood glucose and wearable type apparatus for the same | |
| US11690513B2 (en) | Methods and system for multi-channel bio-optical sensing | |
| KR101717060B1 (en) | Mobile flash module device having healthcare function | |
| CN106993117A (en) | A kind of auxiliary lens of Intelligent mobile equipment and illumination adjustment system | |
| CN106999117A (en) | Pulse oximetry device and the method for operating pulse oximetry device | |
| WO2019232042A1 (en) | Biometric sensor head assembly | |
| US20180103857A1 (en) | Sensor for sensing a biometric function | |
| CN213551804U (en) | Blood oxygen detection device and intelligent wearable equipment | |
| KR101919229B1 (en) | Apparatus and method for measuring a biometrics information | |
| CN205545531U (en) | Intelligent mobile device's auxiliary lens and illumination adjustment system | |
| WO2021253445A1 (en) | Biological feature detection device and smart wearable apparatus | |
| CN210871603U (en) | Blood oxygen parameter detection module and electronic equipment thereof | |
| WO2021253446A1 (en) | Blood oxygen detection apparatus and intelligent wearable device | |
| Gan et al. | Investigation of optical detection strategies for transabdominal fetal heart rate detection using three-layered tissue model and Monte Carlo simulation | |
| CN210408435U (en) | Near-infrared brain oxygen detection system | |
| CN213551774U (en) | Biological characteristic detection device and intelligent wearable equipment | |
| CN213551703U (en) | Biological characteristic detection device and intelligent wearable equipment | |
| CN112842365A (en) | Detection device and manufacturing method thereof | |
| WO2021253451A1 (en) | Biological characteristic detection apparatus and smart wearable device | |
| WO2019000372A1 (en) | Biological feature detection device and electronic terminal | |
| US20220015673A1 (en) | Integrated optical biosensors including molded beam shaping elements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |