CN210784322U

CN210784322U - Wearable device and physiological parameter monitoring module thereof

Info

Publication number: CN210784322U
Application number: CN201821327641.8U
Authority: CN
Inventors: 何岸; 梁世春; 李红波
Original assignee: DO Technology Co ltd
Current assignee: DO Technology Co ltd
Priority date: 2018-08-17
Filing date: 2018-08-17
Publication date: 2020-06-19
Anticipated expiration: 2028-08-17

Abstract

The embodiment of the utility model discloses wearing formula equipment and physiological parameter monitoring module thereof. This physiological parameter monitoring module includes: the light-emitting device comprises a first light source, light emitted by the first light source forms reflected light through a human body, and the reflected light is utilized to measure physiological parameters of the human body. At least two light detectors are used to detect the reflected light. The light-emitting device and the at least two photodetectors are arranged on the same side face of the carrier plate, and the at least two photodetectors surround the light-emitting device. The distance between the center of each light detector in the at least two light detectors and the center of the first light source is between 3.5mm and 4.5 mm. The utility model provides a physiological parameter monitoring module utilizes a light source of a plurality of optical detection device sharing, has improved the detection accuracy when not increasing the consumption.

Description

Wearable device and physiological parameter monitoring module thereof

Technical Field

The utility model relates to a health monitoring technical field especially relates to a wearable equipment and physiological parameter monitoring module thereof.

Background

Physiological parameter monitoring has become the standard matching function of smart bracelets and smart watches for monitoring or detecting physiological parameters such as user heart rate, pulse, etc. Currently, a commonly used physiological monitoring method is a photoelectric measurement method. The reflection of light is kept constant due to the skin, bones, meat, fat, etc. of the human body. The blood volume in the skin changes pulsively under the action of the heart. When the heart contracts, the peripheral blood volume is at its maximum and the light absorption is at its maximum, the reflection of light is smaller, whereas at the diastole, the opposite is the reflection of light larger. Therefore, the reflection of light by the human body fluctuates, and the frequency of the fluctuation is the pulse, which is consistent with the heart rate of the human body. Thus, the physiological information of the human body can be indirectly detected by monitoring the reflection condition of the visible light (such as green light and red light) in the human body tissue.

The heart rate monitoring structure generally includes a light detector (PD) and a light emitting device. The light of the light emitting means is emitted into the skin of the user and reflected through the skin to the PD. The amount of light captured by the PD may be indicative of the amount of blood within the skin of the user. As the amount of blood varies depending on the heart rate, the light reflected back from the skin of the user also varies. Thus, by the amount of light detected by means of the PD, the heart rate can be determined.

However, the conventional physiological parameter monitoring structure using the photoelectric measurement method generally uses one PD for one light emitting device or a plurality of light emitting devices, and thus, to improve the monitoring performance, the power consumption needs to be increased as a cost.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a physiological parameter detection module and wearing equipment of high accuracy, low-power consumption.

The utility model discloses an aspect provides a physiological parameter monitoring module, it includes:

the light-emitting device comprises a first light source, wherein light emitted by the first light source forms reflected light after passing through a human body, and the reflected light is used for measuring physiological parameters of an object to be measured;

at least two light detectors for detecting the reflected light;

the light-emitting device and the at least two photodetectors are mounted on the same side face of the carrier plate, the at least two photodetectors surround the first light source, and the distance between the center of each photodetector in the at least two photodetectors and the center of the first light source is 3.5 mm-4.5 mm.

Preferably, the at least two light detectors include two light detectors, centers of the two light detectors are located on the same straight line with a center of the first light source, and distances from the two light detectors to the first light source are different.

Preferably, the at least two light detectors include a plurality of the light detectors arranged in a predetermined pattern, a portion of the plurality of light detectors being relatively close to the first light source and a portion of the plurality of light detectors being relatively far from the first light source.

Preferably, the at least two light detectors include a plurality of pairs of the light detectors, the centers of the light detectors of each pair are located on the same line with the center of the first light source, and the two light detectors of each pair are located at different distances from the first light source, a portion of the light detectors are relatively close to the first light source, a portion of the light detectors are relatively far away from the first light source, the portion of the light detectors are spaced adjacently relative to the light detectors close to the first light source, and the portion of the light detectors are spaced adjacently relative to the light detectors far away from the first light source.

Preferably, the at least two light detectors include a plurality of pairs of the light detectors, the centers of the light detectors of each pair are located on the same line with the center of the first light source, and the two light detectors of each pair are located at different distances from the first light source, a part of the light detectors are relatively close to the first light source, a part of the light detectors are relatively far from the first light source, the part of the light detectors are relatively close to the first light source, and the part of the light detectors relatively far from the first light source are alternately arranged.

Preferably, the physiological parameter monitoring module further comprises a processor, and the processor turns off the light detector relatively close to the first light source when the physiological parameter monitoring module is in a motion state.

The utility model discloses another aspect still provides a wearable equipment, wearable equipment includes the host computer and the aforesaid physiological parameter monitoring module, physiological parameter monitoring module set up in the host computer.

Preferably, the wearable device further comprises a tie for tying the main unit to a human body.

Preferably, the host includes a back surface, the back surface is provided with a window area, the first light source emits light outwards through the window area, and the reflected light is incident to the at least two photodetectors through the window area.

Preferably, the window area comprises three windows, and each window corresponds to the first light source and the two light detectors one by one.

The embodiment of the utility model provides a physiological parameter monitoring module and wearable equipment sets up a light source of two at least photo detector sharing, and for the physiological parameter monitoring scheme that a light source or a plurality of light source correspond a photo detector of current, improved physiological parameter monitoring precision and not additionally increased the consumption.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic perspective view of a wearable device provided by an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a physiological parameter monitoring module according to a first embodiment of the present invention.

Fig. 3 is an electrical connection diagram of an exemplary functional module of a physiological parameter monitoring module according to an embodiment of the present invention.

FIGS. 4a to 4c are schematic views illustrating the monitoring results of the physiological parameter monitoring module in this embodiment.

Fig. 5 is a schematic exploded view of a physiological parameter monitoring module according to a second embodiment of the present invention.

Fig. 6 is a schematic diagram of a light detector and a first light source provided by a first embodiment of the present invention.

Fig. 7 is a schematic diagram of a light detector and a first light source provided by a third embodiment of the present invention.

Fig. 8 is a schematic diagram of a photodetector and a first light source provided by a fourth embodiment of the present invention.

Fig. 9 is a schematic diagram of a photodetector and a first light source provided in a fifth embodiment of the present invention.

Fig. 10 is a schematic diagram of a photodetector and a first light source provided by a sixth embodiment of the present invention.

DESCRIPTION OF SYMBOLS IN THE DRAWINGS

Wearable device 200

Host 201

Tie member 202

Carrier plate

40, 40a, 40b

Side surface 41

Back 203

Window 2041

Window area 204

Light emitting device 10

Processor 30

Physiological

parameter monitoring module

100, 300, 400, 500, 600

Light detectors

20, 320, 420, 520, 620

Center of photodetector O₂₁、O_22、O₃₁、O_{32 、}O₃₂₁、O₃₂₂

First light source center O_11、O₃₁₁

First light source

11, 311, 411, 511, 611

Second light source 12

Distance W₁、 W₂、W₃₁、 W_31、

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly. To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

In various exemplary embodiments of the present invention, a physiological parameter monitoring module 100 for optically measuring a physiological condition of a user is provided. The physiological parameter monitoring module 100 measures a physiological parameter of the user and generates a sensor signal corresponding to a property of a subcutaneous substance (e.g., capillaries and veins) of the user. The physiological parameter monitoring module 100 is particularly suitable for a user-wearable device.

Please refer to fig. 1 and fig. 2, which are schematic diagrams of a wearable device 200 and a structural schematic diagram of a physiological parameter monitoring module 100 according to an embodiment of the present invention. The physiological parameter monitoring module 100 is widely applied to the wearable device 200. Wearable device 200 may be in the form of, but not limited to, a bracelet, a watch, a ring, an arm band, and the like wearable product. In this embodiment, the wearable device 200 is configured as a strap bracelet. Wearable device 200 includes a host 201 and a tether 202. The physiological parameter monitoring module 100 is disposed in the host 201. The tie member 202 is in the form of a strap for attaching the host 201 to, but not limited to, the wrist, arm, etc. of the wearer. The main body 201 includes a back surface 203 that contacts the wearer's skin. The back 203 is provided with a window area 204, and the window area 204 is arranged adjacent to the physiological parameter monitoring module 100. The physiological parameter monitoring module 100 irradiates light to the skin of a person through the window area 204, and receives the amount of light reflected by the skin to calculate the physiological parameter of the person.

Referring to fig. 2 and fig. 3, fig. 3 is a schematic diagram of electrical connections of functional modules of the physiological parameter monitoring module 100. The physiological parameter monitoring module 100 includes a light emitting device 10, two Photo Detectors (PDs) 20, a processor 30, and a carrier plate 40. In the present embodiment, the light emitting device 10, the two optical detectors 20, and the processor 30 are all mounted on the carrier 40. The light emitting device 10 and the two photodetectors 20 are disposed on the same side 41 of the carrier plate 40. The side surface 41 faces the back surface 203. Two photodetectors 20 are respectively located on both sides of the light emitting device 10, the center O of the light emitting device 10₁₁Center O of two photodetectors 20₂₁And O₂₂Are located on a straight line. If the wearable device 200 is worn, the light emitting device 10 and the two light detectors (PDs) 20 in the physiological parameter monitoring module 100 are close to the skin of the wearer. Wherein, light is emittedThe light emitted by the device 10 is directed to illuminate the corresponding portion of the human body and is prevented from directly entering the two photodetectors 20 for detection. The light emitted by the light emitting device 10 is reflected by the human body and enters the two light detectors 20. Preferably, the window area 204 is divided into 3 independent windows 2041, each window 2041 is isolated from each other, and the light emitting device 10 and the two light detectors 20 are in one-to-one correspondence with the 3 window areas 2041, so as to prevent light emitted by the light emitting device 10 from directly entering the two light detectors 20.

The light emitting device 10 includes a first light source 11 and a second light source 12. In the present embodiment, the first light source 11 and the second light source 12 are diodes (LEDs). The first light source 11 emits green light. The second light source 12 emits infrared light. Wherein the first light source 11 is utilized to measure a physiological parameter. The second light source 12 is utilized to detect whether the physiological parameter monitoring module 100 is worn. It will be appreciated that the type of light source of the light emitting device 10 may be selected based on the measured physiological parameter. For example, if the light emitting device 10 is required for the purpose of measuring heart rate, the type of light emitting device 10 is preferably an LED that emits green light, since green light may be more visible and less disturbing due to light reflected back from the skin of a person. If used to measure other physiological parameters than heart rate, such as blood oxygen level, the type of light emitting device 10 is preferably a red or infrared light emitting device. In the present embodiment, the physiological parameter monitoring module 100 measures the heart rate of the user by using the Principle of Photoplethysmography (PPG). That is, the physiological parameter monitoring module 100 mainly uses the first light source 11 to measure the heart rate, so the first light source 11 is preferably an LED emitting green light. It will be appreciated that the first light source 11 comprises one or more LEDs emitting green light. In some possible embodiments, the light-emitting device 10 only includes the first light source 11 and does not include the second light source 12 if it is not necessary to monitor whether the wearable device 200 is worn or to otherwise monitor whether the wearable device 200 is worn.

The two photodetectors 20 are phototransistors, such as Photodiodes (PDs). The light emitted by the first light source 11 passes through the human body to form reflected light, which is used to measure physiological parameters of the human body. The light detector 20 is used to detect the reflected light. Light (es)The detector 20 generates a corresponding physiological sensing electrical signal from the detected light. The physiological sensing electrical signal can be used to calculate a physiological parameter measurement. In the present embodiment, the two photodetectors 20 are symmetrically disposed on both sides of the first light source 11. Specifically, the centers O of the two photodetectors 20₂₁And O₂₂To the center O of the first light source 11₁₁Distance W of₁And W₂Are equal. Based on experimental tests, distance W₁And W₂In the range of 3.5mm to 4.5mm, the two photodetectors 20 receive the largest amount of light reflected back through the skin from the first light source 11 (as shown in fig. 4a-4 c). Thus, in the present embodiment, the distance W₁And W₂Is set according to the optimal light quantity range received by the two light detectors 20 and reflected by the human skin, namely W₁And W₂The range of (A) is 3.5mm to 4.5 mm. Preferably, W₁And W₂Set at 3.7 mm. Wherein the center O of the photodetector 20₂₁And O₂₂Is the center of the light sensing area. The light sensing area of the light detector 20 is in a regular pattern. In the present embodiment, the light sensing area of the light detector 20 is square. In some possible embodiments, the light sensing area of the light detector 20 may also be rectangular or other patterns. In the present embodiment, the center O of the first light source 11₁₁Is a luminescent center. If the first light source 11 is only a light emitting device, the center O of the first light source 11₁₁Is the light emission center of the light emitting element. If the first light source 11 includes a plurality of light emitting elements arranged in a predetermined pattern, the center O of the first light source 11₁₁The center of the preset pattern (not shown).

In this embodiment, the two light detectors 20 are further configured to detect infrared light reflected back from the human body, and generate corresponding state sensing electrical signals according to the detected infrared light. The state sensing electrical signal is utilized to detect whether the user has a wearable device 200.

In the present embodiment, the processor 30 is electrically connected to the two light detectors 20 and the light emitting device 10, respectively, and the processor 30 is loaded on the carrier 40. In some possible embodiments, the processor 30 and the two light detectors 20 and the light emitting devices 10 are loaded with

different carriers

40a and 40b, respectively (as shown in fig. 5). The processor 30 is configured to calculate a physiological parameter measurement from the physiological sensing electrical signal. In the present embodiment, the processor 30 is further configured to control the on/off of the two light detectors 20 and the light emitting device 10, and the brightness of the light emitting device 10. Specifically, the processor 30 turns off and starts the wearable device 200 according to the wearing condition of the wearable device 200. If the wearable device 200 is not worn, the processor 30 turns off the two photodetectors 20 and the first light source 11; if the wearable device 200 is worn, the processor 30 turns on the two photodetectors 20 and the first light source 11. Therefore, power consumption is further reduced.

Please refer to fig. 7, which is a simplified diagram of a physiological parameter monitoring module 300 according to a second embodiment of the present invention. The physiological parameter monitoring module 300 provided in the second embodiment includes substantially the same components as the physiological parameter monitoring module 100 provided in the first embodiment, except that the two optical detectors 320 and the first light source 311 are asymmetrically and symmetrically disposed in the physiological parameter monitoring module 300 provided in the second embodiment. Specifically, the centers O of the two photodetectors 320₃₂₁And a center O₃₂₂And the center O of the first light source 311₃₁₁On a straight line, but at the center O of the two photodetectors 320₃₁And a center O₃₂And the center O of the first light source 311₁₂A distance W therebetween₃₁And W₃₁Different. W₃₁And W₃₁The range of (a) is still between 3.5mm and 4.5 mm. That is, in the present embodiment, one of the light detectors 320 is close to the first light source 311, and the other light detector 320 is far from the first light source 311. In addition, there is a difference between the physiological parameter monitoring module 300 provided in the second embodiment and the physiological parameter monitoring module 100 of the first embodiment, in that the processor (not shown) is further configured to turn off one of the light detectors 320 according to the motion state of the user of the wearable device 200. Specifically, if the user is in an exercise state (e.g., swimming, running, etc.), the processor turns off the light detector 320 that is relatively close to the first light source 311 and increases the brightness of the light detector 320. Therefore, the physiological parameter monitoring module 300 can reduce the power consumption as much as possible while maintaining the detection accuracy. In some possible embodimentsThe user motion state may be sensed by adding a motion sensor, such as a three-axis acceleration sensor, a gravity sensor, etc., to the wearable device 100.

Referring to fig. 8-10, fig. 8-10 illustrate a physiological parameter monitoring module having a pair (two) or more photodetectors. In some possible embodiments, the physiological parameter monitoring module includes two or more light detectors disposed about the first light source. The physiological parameter monitoring modules shown in fig. 8 to 10 are all described in pairs. In some possible embodiments, the light detectors may not be present in pairs, and the number of light detectors may be singular. As seen in fig. 8-10, the physiological

parameter monitoring modules

400, 500, 600 each include 3 pairs (6) of

photodetectors

420, 520, 620. Wherein the center line of each pair of

photodetectors

420, 520, 620 passes through the center of the first

light source

411, 511, 611. That is, the center of each pair of

photodetectors

420, 520, 620 is aligned with the first

light source

411, 511, 611.

Specifically, referring to fig. 8, the physiological parameter monitoring module 400 shown in fig. 8 includes a plurality of light detectors 420, and each pair of light detectors 420 is symmetrically disposed with respect to the first light source 411. That is, each of the photodetectors 420 in the pair of photodetectors 420 is equidistant from the first light source 411, respectively.

Referring to fig. 9-10, the physiological parameter monitoring modules 500 and 600 shown in fig. 9 and 10 include a plurality of light detectors. At least one of the photodetectors has different distances from the first light source, and is placed according to a preset placing mode. This predetermined arrangement is schematically shown in fig. 9 and 10, but is not limited thereto.

Referring to fig. 9, fig. 9 shows that each pair of light detectors 520 is asymmetrically disposed with respect to the first light source 511. Wherein a portion of light detector 520 is relatively close to first light source 511 and a portion of light detector 520 is relatively far from first light source 511. In the present embodiment, each pair of photodetectors 520 are spaced apart from first light source 511 at unequal distances, and photodetectors 520 that are relatively close to first light source 511 are arranged in spaced-apart, adjacent arrangement.

Referring to fig. 10, fig. 10 illustrates that each pair of light detectors 620 is asymmetrically positioned with respect to the first light source 611. Wherein a portion of the light detector 620 is relatively close to the first light source 611 and a portion of the light detector 620 is relatively far from the first light source 611. In this embodiment, each pair of photodetectors 620 is at an unequal distance from the first light source 611, and the photodetectors 620 relatively close to the first light source 611 and the photodetectors 620 far from the first light source 611 are alternately arranged.

It is understood that fig. 8 to 10 are merely examples of the physiological parameter monitoring module including two or more photodetectors, and are not limited thereto.

It will be appreciated that the foregoing discussion merely discusses various exemplary embodiments in connection with optical monitoring of heart rate. However, the various embodiments are not limited to only heart rate optical monitoring. Rather, the exemplary embodiments can also be used for optical monitoring of some other physiological parameter. The physiological condition or physiological measurement mentioned in this embodiment may include one or more of the following: heart rate, respiration rate, blood pressure, blood oxygen saturation level, and blood glucose level, or other physiological condition measurements may also be applied.

The above description is for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A physiological parameter monitoring module is characterized in that: the method comprises the following steps:

the light-emitting device comprises a first light source, wherein light emitted by the first light source passes through a human body to form reflected light, and the reflected light is used for measuring physiological parameters of the human body;

at least two light detectors for detecting the reflected light;

2. The physiological parameter monitoring module of claim 1, wherein said at least two light detectors include two of said light detectors, the centers of the two light detectors are located on the same line as the center of said first light source, and the two light detectors are located at different distances from said first light source.

3. The physiological parameter monitoring module of claim 1, wherein the at least two light detectors comprise a plurality of the light detectors, the plurality of light detectors being arranged in a predetermined pattern, a portion of the plurality of light detectors being relatively close to the first light source and a portion of the plurality of light detectors being relatively far from the first light source.

4. The physiological parameter monitoring module of claim 1, wherein said at least two light detectors comprise a plurality of pairs of said light detectors, the centers of said light detectors of each pair being collinear with the center of said first light source, and the two light detectors of each pair being spaced from said first light source differently, a portion of said light detectors being relatively close to said first light source, a portion of said light detectors being relatively far from said first light source, said portion being spaced adjacently relative to the light detectors closer to said first light source, said portion being spaced adjacently relative to the light detectors further from said first light source.

5. The physiological parameter monitoring module of claim 1, wherein the at least two light detectors comprise a plurality of pairs of the light detectors, the centers of the light detectors of each pair being collinear with the center of the first light source, and the two light detectors of each pair being spaced apart from the first light source, wherein a portion of the light detectors are relatively close to the first light source, a portion of the light detectors are relatively far from the first light source, and wherein the portions are spaced apart alternately relatively close to the first light source and relatively far from the first light source.

6. A physiological parameter monitoring module according to any one of claims 2 to 5, further comprising a processor, wherein the processor turns off the light detector relatively close to the first light source when the physiological parameter monitoring module is in motion.

7. A wearable device, the wearable device comprises a host, and the wearable device is characterized by further comprising the physiological parameter monitoring module set according to any one of claims 1-6, and the physiological parameter monitoring module set on the host.

8. The wearable device of claim 7, further comprising a tie for tying the host to a human body.

9. The wearable device of claim 7, wherein the host includes a back surface having a window area through which the first light source emits light outward, the reflected light passing through the window area to the at least two light detectors.

10. The wearable device of claim 9, wherein the window area comprises three windows, each window corresponding to one of the first light source and the two light detectors.