CN214073288U

CN214073288U - Photoelectric detection assembly and wearable equipment

Info

Publication number: CN214073288U
Application number: CN202022295761.8U
Authority: CN
Inventors: 杨金果
Original assignee: Anhui Huami Information Technology Co Ltd
Current assignee: Anhui Huami Information Technology Co Ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-08-31
Anticipated expiration: 2030-10-15

Abstract

The utility model relates to an electronic equipment technical field specifically provides a photoelectric detection subassembly and wearable equipment. The photoelectric detection component is applied to wearable equipment, and the photoelectric detection component comprises: at least one light source; and a plurality of sensors, the sensors including a detection end adapted to receive light; the detection ends of the sensors are sequentially and adjacently connected in a side-by-side manner to form a complete annular structure, and the at least one light source is arranged in the middle space of the annular structure. The detection ends of the plurality of sensors are closely adjacent to each other in the same side to form an annular structure, so that the equipment space is utilized to the maximum extent, namely the detection area of the detection ends is greatly increased under the condition that the same space is occupied, the light incoming amount of reflected light is increased, and the detection precision of the detection assembly is improved.

Description

Photoelectric detection assembly and wearable equipment

Technical Field

The utility model relates to an electronic equipment technical field, concretely relates to photoelectric detection subassembly and wearable equipment.

Background

The method for detecting human physiological parameters by utilizing a photoplethysmography (PPG) is one of the most common modes of the current intelligent wearable equipment, and the basic principle is that light is emitted into human tissues, and various human physiological parameters including heart rate are calculated through the light intensity change reflected or transmitted by the human tissues. The photoelectric detection subassembly of intelligence wearing equipment generally includes light source and photoelectric sensor, and light source emission light pierces through human skin tissue, and partial light is worn out after human tissue vascular reflection, and photoelectric sensor receives and detects the light signal of wearing out to obtain human physiological parameters such as rhythm of the heart.

In the correlation technique, in order to improve detection effect, set up a plurality of sensors that are used for detecting human physiological parameter in the intelligence wearing equipment meeting. However, in the related art, the area utilization rate of the multiple sensor arrays to the detection end of the device is low, and the accuracy of the detection result is limited.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem that wearing equipment testing result precision is limited, this disclosed embodiment provides a photoelectric detection subassembly and wearable equipment.

In a first aspect, the present disclosure provides a photoelectric detection assembly applied to a wearable device, the photoelectric detection assembly including:

at least one light source; and

a plurality of sensors, the sensors comprising a detection end adapted to receive light; the detection ends of the sensors are sequentially and adjacently connected in a side-by-side manner to form a complete annular structure, and the at least one light source is arranged in the middle space of the annular structure.

In some embodiments, the photodetection assembly comprises a light source, which is located at the centroid of the ring-shaped structure.

In some embodiments, the photodetection assembly comprises the same number of light sources as the plurality of sensors, and the plurality of light sources are disposed in a one-to-one correspondence along the ring-shaped structure at a position near the detection end.

In some embodiments, a light blocking structure is disposed between the at least one light source and each sensor.

In some embodiments, the detecting end of the sensor is an isosceles trapezoid, and the isosceles trapezoids of the detecting ends are sequentially spliced to form the annular structure.

In some embodiments, the detecting end of the sensor has a sector ring shape, and straight sides of the sector ring shapes of the plurality of detecting ends are sequentially spliced to form the ring-shaped structure.

In some embodiments, the annular structure is one of:

circular, oval or polygonal rings.

In a second aspect, embodiments of the present disclosure provide a wearable device, including:

a housing having a detection portion adapted to be brought into close proximity to an object to be measured;

in the photodetection assembly according to any one of the first aspect to the embodiment, the detection ends of the plurality of sensors are provided in the detection portion of the housing, and the light source is adapted to emit light toward the object to be measured.

In some embodiments, a light shielding portion is provided between the light source and the sensor on the detection portion.

In some embodiments, the wearable device is a smart watch or a smart bracelet, and the detection portion is located on the back of the smart watch or the smart bracelet.

The photoelectric detection assembly of the embodiment of the disclosure is applied to wearable equipment, and the photoelectric detection assembly comprises at least one light source and a plurality of sensors, and the detection ends of the plurality of sensors are sequentially connected in a side-by-side adjacent manner, so that a complete annular structure is formed, and the at least one light source is arranged in the middle space of the annular structure. Through a plurality of sensor detected signal, improve signal detection precision to the sense terminal of a plurality of sensors is connected and is formed complete annular, thereby furthest utilizes equipment space, improves the detection area of sense terminal under the same space, improves detection precision greatly.

The photoelectric detection assembly comprises a light source, wherein the light source is arranged at the centroid position of the annular structure, namely the plurality of sensors receive the reflection signals of the same light source, so that the plurality of sensors can be utilized to work cooperatively to detect the reflection signals of different limb positions, the detection result is obtained according to the plurality of signals, and the detection accuracy is improved.

The photoelectric detection assembly comprises the light sources with the same number as the sensors, and each light source is correspondingly arranged at a position close to one detection end, so that in the signal detection process, each sensor and the corresponding light source can work independently, and the best signal or signals can be obtained according to sensing signals of different limb positions, so that the sensors at the best positions work, and the accuracy of detection results is improved.

The photoelectric detection assembly of the embodiment of the present disclosure, the detection end of the sensor is an isosceles trapezoid, the isosceles trapezoid waists of the plurality of detection ends are sequentially spliced to form an annular structure, and the isosceles trapezoid is in a straight-side shape, so that the sensor can be conveniently processed, and the processing cost is reduced.

The photoelectric detection subassembly of this disclosure embodiment, the sense terminal of sensor is fan-shaped annular, and the fan-shaped annular straight flange of a plurality of sense terminals splices in proper order and forms annular structure, and fan-shaped annular concatenation forms annular structure to maximize the detection area of sense terminal under the same space, improve and detect the precision.

The wearable device of the embodiment of the present disclosure includes the housing and the above-mentioned photoelectric detection assembly, and the photoelectric detection assembly is disposed in the detection portion of the housing, so as to have the above-mentioned beneficial effects, which are not repeated herein.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure 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 described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a structure of a photodetecting assembly according to some embodiments of the present disclosure.

FIG. 2 is a schematic diagram of a structure of a photodetecting assembly according to further embodiments of the present disclosure.

FIG. 3 is a schematic diagram of a structure of a photodetecting assembly according to further embodiments of the present disclosure.

FIG. 4 is a schematic diagram of a structure of a photodetecting assembly according to further embodiments of the present disclosure.

FIG. 5 is a schematic diagram of a structure of a photodetecting assembly according to further embodiments of the present disclosure.

FIG. 6 is a schematic diagram of a structure of a photodetecting assembly according to further embodiments of the present disclosure.

Fig. 7 is a schematic structural diagram of a wearable device according to some embodiments of the present disclosure.

Description of reference numerals:

110-a detection end; 120-a light source; 210-a detection section; 211-light transmission holes; 212-light blocking portion.

Detailed Description

The technical solutions of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure. In addition, technical features involved in different embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

Increasingly, intelligent wearable devices integrate human physiological parameter detection functions, such as heart rate detection, blood oxygen detection and the like. To human heart rate detection, intelligence wearing equipment generally adopts the photoplethysmography (PPG) principle to detect, for example intelligent wrist-watch, bracelet etc. when carrying out heart rate detection, the photoelectric detection subassembly of requirement equipment hugs closely human skin, and light source emission light pierces through human skin tissue, and partial light wears out after human tissue vascular reflection to the sense terminal of sensor can receive the light signal of wearing out, obtains human physiological parameters such as heart rate through subsequent circuit demodulation.

Use intelligent wrist-watch as an example, the back of wrist-watch is often located to rhythm of the heart determine module to human wrist skin is hugged closely to rhythm of the heart determine module's sense terminal after wrist-watch wears, can carry out rhythm of the heart to the human body at any time and detect. For photoelectric detection, blood vessel tissues at different parts of a human body are distributed differently, and in order to improve detection accuracy as much as possible, a user needs to wear a watch at an optimal wearing position, for example, wear the watch at a distance of 2cm to 3cm from a wrist to obtain an optimal detection result. This undoubtedly increases the learning cost and redundant operations of the user wearing the watch, greatly reducing the user experience.

In order to avoid increasing the learning cost of a user, in the related art, a part of smart watches adopt a plurality of sensors to work in a cooperative manner, and the plurality of sensors are arranged at different positions on the back of the watch, so that a relatively accurate detection result can be obtained according to detection signals of the plurality of sensors, for example, an average value of the plurality of signals is obtained, or an optimal signal is determined according to the plurality of signals. However, in the related art, the space utilization rate of the back of the watch by the plurality of sensors is low, which results in a small detection area of the sensors, so that the light incident amount of the detection end is small, which causes limitation of detection accuracy, and thus, the detection accuracy requirement of a professional scene is difficult to meet.

In order to solve the above-mentioned drawbacks in the related art, embodiments of the present disclosure provide a photodetection assembly, which may be applied to a wearable device.

Specifically, in some embodiments, the optoelectronic sensing assembly of the present disclosure includes at least one light source and a plurality of sensors, each having a sensing end, i.e., a sensing end that receives light reflected from human tissue, and is generally positioned in a location suitable for placement against human skin. The detection ends of the sensors are sequentially and adjacently connected in a side-by-side manner, so that a complete annular structure is formed, and at least one light source is arranged in the middle space of the annular structure.

In one example, the detection ends of the sensors are sequentially connected in a close-proximity manner in a common-edge manner to form a circular ring structure, and one light source is arranged at the center of the circular ring.

In another example, the detection ends of the sensors are sequentially connected in a side-by-side adjacent manner to form a rectangular ring structure, and one light source is arranged at the centroid position of the rectangular ring.

According to the photoelectric detection assembly, the detection ends of the plurality of sensors are in close proximity to each other on the same side to form the annular structure, so that the equipment space is utilized to the maximum extent, namely, the detection area of the detection ends is greatly increased under the condition that the same space occupies, the light incoming amount of reflected light is increased, and the detection precision of the detection assembly is improved. In addition, in the annular structure formed by the plurality of sensors, different sensors can detect human tissue signals at different positions, so that the plurality of sensors cooperatively work to obtain a more accurate detection result.

It should be noted that, as can be seen from the above description, at least one inventive concept of the photodetecting assembly of the present disclosure is: the detection ends of the sensors are closely adjacent to each other in the same side to form an annular structure, so that the space of the wearable equipment is utilized to the maximum extent, and the detection precision is improved. It can be seen that the type of wearable device in the embodiments of the present disclosure need not be limited, and may be any device type suitable for implementation, such as watch-type devices, smart wristbands, and the like; glass equipment such as intelligent glasses, VR glasses and AR glasses; for example, wearing equipment such as intelligent clothes and wearing pieces; and the like. Meanwhile, the shape of the ring-shaped structure in the embodiments of the present disclosure is not limited, and for example, the ring-shaped structure may be a circular ring, a rectangular ring, an elliptical ring, a rounded rectangular ring, a polygonal ring of any other shape, or a ring of any other irregular shape, which is not limited in the present disclosure. The following detailed description is to be read in connection with specific embodiments.

FIG. 1 illustrates one embodiment of a photodetecting assembly according to the present disclosure. As shown in fig. 1, in the present embodiment, the photo detection assembly includes one light source 120 and six sensors, one for each detection terminal 110. For clarity, only the detecting end 110 of the sensor is shown in the drawings, and for the electrical part of the sensor which is not shown, the implementation can be realized by those skilled in the art with reference to the related art, and the details are not repeated herein.

Each detection end 110 is in the shape of an isosceles trapezoid, and when six detection ends 110 are sequentially connected in a side-by-side adjacent manner, the isosceles trapezoids of two adjacent detection ends 110 are sequentially spliced, so that the six detection ends 110 are connected to form a hexagonal ring structure as shown in the figure. The light source 120 is disposed at the centroid of the hexagonal ring structure, i.e., the center of the hexagonal ring structure, so that the distance from the light source 120 to each of the detecting ends 110 is the same.

In this embodiment, the photoelectric detection module may have the following two operation modes when detecting signals:

1) the detection ends 110 of the six sensors continuously acquire signals, and the processor integrates the signals of the six sensors to obtain related physiological parameters.

In one example, the signals of the six sensors may be averaged, and the average value may be used as the physiological parameter signal from which the relevant physiological parameter is derived.

In another example, each sensor may be given a different weight, the signals from the six sensors are weighted and summed, the sum is taken as the physiological parameter signal, and the relevant physiological parameter is derived from the weighted and summed signal.

Under this mode of operation, take the intelligent wrist-watch as an example, because the position that each sense terminal 110 corresponds human wrist is different, the signal that its detected also can have the difference, through integrating a plurality of signals, eliminates the error that different positions brought to improve the accuracy of detected signal greatly.

2) The detection terminals 110 of the six sensors sequentially poll to acquire signals, and the processor obtains the optimal one or more signals according to the six detection signals, so that the one or more sensors are selected as working sensors.

In one example, signals of six sensors are periodically polled, and the best one of the six sensor signals is determined according to the quality of the detection signals, so that the sensor corresponding to the best detection signal is used as an operating sensor, and other sensors are in a non-operating state.

In the working mode, detection signals of six sensors are obtained through polling, and the best working sensor is determined, so that the power consumption of the equipment is reduced and the endurance time of the equipment is prolonged under the condition of ensuring the high precision of the detection signals.

Therefore, in the embodiment, the plurality of sensors work cooperatively to detect the reflection signals of different limb positions, and the detection result is obtained according to the integration of the plurality of signals, so that the detection accuracy is improved, the power consumption of the equipment is reduced, and the endurance time is prolonged.

Fig. 2 illustrates another embodiment of a photodetecting assembly according to the present disclosure. As shown in fig. 2, in the present embodiment, the photo-detection assembly includes 8 sensors, so that the detection ends 110 of the 8 sensors are sequentially connected in close proximity to each other on the same side to form an octagonal ring structure. The rest of the structure is the same as the embodiment of fig. 1, and the working principle is only needed by referring to the embodiment of fig. 1, which is not described herein again.

It can be seen that the inventive concept of the embodiments of the present disclosure is that the detecting ends of a plurality of sensors are sequentially and closely connected together to form a complete ring structure, and therefore, there is no need to limit the number of the sensors, for example, the number of the sensors may be any number suitable for implementation, such as 4, 8, 10, and the like, and the present disclosure does not limit this.

It is worth to be noted that, in the embodiment shown in fig. 1 and 2, the detection end 110 of the sensor is in the shape of an isosceles trapezoid, and all sides of the isosceles trapezoid are straight sides, so that the detection end 110 is easier to cut during processing, the processing difficulty is reduced, and the isosceles trapezoid has almost no waste during processing, thereby greatly improving the material utilization rate and reducing the processing cost.

Of course, in other embodiments of the present disclosure, the detecting end 110 may have any other shape suitable for implementation, so as to form a ring structure with other shapes, for example, two exemplary embodiments are shown in fig. 3 and 4.

In the embodiment of fig. 3 and 4, the difference from the embodiment of fig. 1 and 2 is that: the sensing tip 110 is shaped differently to form a different loop configuration.

As shown in fig. 3, in the present embodiment, the detecting end 110 has a fan-shaped ring structure, and the angle of each fan-shaped ring is 60 °, so that the straight edges of the detecting ends 110 of the 6 sensors are spliced to form a complete ring structure. In the same occupied space, the circular ring has a larger area utilization ratio, so that the embodiment can maximize the detection area of the detection end 110 compared with the embodiments of fig. 1 and 2.

As shown in fig. 4, in the present embodiment, the detecting end has an elliptical fan-ring structure, and the angle of each elliptical fan-ring is 90 °, so that the straight edges of the detecting ends 110 of the 4 sensors are spliced to form a complete elliptical structure.

In the embodiment of the present disclosure, the detecting end 110 is not limited to the shape in the above embodiment, and may also be any other shape suitable for implementation, so as to form an annular structure with other shapes by splicing, for example, a rectangular ring, a rounded rectangular ring, other polygonal rings, even an irregular ring, etc., which cannot be exhaustive by the present disclosure, but it should be understood by those skilled in the art that the detailed description is omitted.

In the above embodiment, the light source 120 is used by a plurality of sensors, that is, the detecting ends 110 of the plurality of sensors receive the reflected light from the same light source 120. In other embodiments, the detection assembly of the present disclosure may have other numbers of light sources 120. An exemplary embodiment is shown in fig. 5.

As shown in fig. 5, in the present embodiment, the structure of the detecting end 110 may be as in the embodiment of fig. 1, and is not described herein again. The present embodiment differs from the embodiment of fig. 1 in that: each detection end 110 is correspondingly provided with one light source 120, that is, the photoelectric detection assembly comprises the light sources 120 with the same data as the sensor, and the plurality of light sources 120 are correspondingly arranged at positions close to the detection ends 110 along the annular structure.

In this embodiment, when the photodetecting module performs signal detection, the following two operation modes are also possible:

1) each group of light source and sensor work independently, the six groups of sensors and light sources continuously acquire signals, and the processor integrates the signals of the six sensors to obtain related physiological parameters.

2) Each group of light source and sensor works independently, six groups of sensors and light sources poll in sequence to acquire signals, and the processor obtains the optimal one or more signals according to the six detection signals, so that the one or more sensors are selected as working sensors.

As can be seen from the above, in the present embodiment, the plurality of light sources and the plurality of sensors are in one-to-one correspondence, so that each group of light sources and the plurality of sensors keep an appropriate distance to obtain an optimal sensing signal, thereby improving the accuracy of the detection result.

It is understood that, based on the example shown in fig. 5, in other embodiments, the number of the light sources 120 may be any other suitable number, may be the same as or different from the number of the detection ends, and the shape of the detection end may also be any other suitable shape, which is not described herein again.

It should be noted that, for the photoelectric sensor, the crosstalk problem refers to that light emitted from the light source directly enters the sensor detection end before entering human tissue, thereby interfering with the sensor receiving signal.

Therefore, in some embodiments, in order to reduce the crosstalk problem, a light blocking structure (not shown in the drawings), such as a light blocking plate, a crosstalk-proof block, a crosstalk-proof silk screen, or the like, is disposed between the light source 120 and each sensor, so as to prevent light emitted from the light source 120 from directly entering the detection end 110, and improve accuracy of a detection result.

In other embodiments, when the photodetection assembly has only one light source 120, the light source 120 can be disposed at any position in the inner space of the ring structure. For example, in the embodiment of fig. 3, the light source 120 is located at the center of the circular ring structure, while in the embodiment of fig. 6, the light source 120 is located at a position close to the detection end a 111 and the detection end B112, that is, the distance between the detection end a 111 and the detection end B112 and the light source 120 is smaller than the distance between the detection end C113, the detection end D114, the detection end E115, and the detection end F116 and the light source 120, which is not limited by the disclosure.

In some embodiments, the light source 120 can be a light source capable of emitting light of a plurality of different wavelengths, such that detection of different physiological parameters can be achieved by emitting light of different wavelengths. In one example, the light source 120 emits light at 660nm and 940nm wavelengths when detecting the blood oxygen saturation level of a human body.

The structure and the principle of the photoelectric detection assembly of the present disclosure are described in detail above, and on the basis of the above embodiment, the present disclosure further provides a wearable device, which may be any type of device described above, and is not repeated here. The structure of the wearable device of the present disclosure is described below with reference to fig. 7.

As shown in fig. 7, in the present embodiment, the wearable device is exemplified by a smart watch, the smart watch includes a housing, a detection portion 210 is formed at a portion of the back of the housing, which is tightly attached to the wrist of the human body, so that the above-mentioned photoelectric detection component is disposed on the detection portion 210, and the detection end 110 is located on the surface of the detection portion 210, so that the detection end 110 can be tightly attached to the skin of the human body when the watch is worn.

The middle portion of the detecting portion 210 is opened with a light transmitting hole 211 so that the light emitted from the light source 120 can be emitted through the light transmitting hole 211. Since the detecting end 110 receives the light penetrating from the skin of the human body, in order to prevent the light from being mixed before entering the tissue of the human body, a light shielding part 212 is disposed at the detecting part between the light-transmitting hole 211 and the detecting end 110. In one example, the opaque material is used to form the opaque portion 212, so as to ensure that the light is scattered before entering the human tissue, and directly enters the detecting end 110, thereby improving the accuracy of the detection result.

For the working principle of the detection component in this embodiment, reference may be made to the foregoing embodiments, and it should be understood by those skilled in the art that the description is not repeated here.

According to the wearable device, the detection ends of the sensors are in close proximity to each other to form the annular structure, so that the device space is utilized to the maximum extent, namely, the detection area of the detection ends is greatly increased under the condition that the same space occupies, the light incoming amount of the reflected light is increased, and the detection precision of the detection assembly is improved. In addition, in the annular structure formed by the plurality of sensors, different sensors can detect human tissue signals at different positions, so that the plurality of sensors cooperatively work to obtain a more accurate detection result.

It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the present disclosure may be made without departing from the scope of the present disclosure.

Claims

1. A photoelectric detection component is applied to wearable equipment, and is characterized by comprising:

at least one light source; and

2. The photodetection assembly according to claim 1,

the photoelectric detection assembly comprises a light source, and the light source is arranged at the centroid position of the annular structure.

3. The photodetection assembly according to claim 1,

the photoelectric detection assembly comprises a plurality of light sources which are the same as the plurality of sensors in number, and the plurality of light sources are correspondingly arranged at positions close to the detection ends one by one along the annular structure.

4. The photodetection assembly according to claim 3,

and a light blocking structure is arranged between the at least one light source and each sensor.

5. The photodetecting assembly according to any one of claims 1 to 4, characterized in that,

the detection ends of the sensor are isosceles trapezoids, and the isosceles trapezoids of the detection ends are sequentially spliced to form the annular structure.

6. The photodetecting assembly according to any one of claims 1 to 4, characterized in that,

the detection ends of the sensor are fan-shaped annular, and fan-shaped annular straight edges of the plurality of detection ends are sequentially spliced to form the annular structure.

7. The photodetecting assembly according to any one of claims 1 to 4, characterized in that the ring-shaped structure is one of:

circular, oval or polygonal rings.

8. A wearable device, comprising:

the assembly according to any one of claims 1 to 7, wherein the detection ends of the plurality of sensors are disposed on the detection portion of the housing, and the light source is adapted to emit light toward the object to be measured.

9. The wearable device of claim 8,

in the detection portion, a light shielding portion is provided between the light source and the sensor.

10. Wearable device according to claim 8 or 9,

wearable equipment is intelligent wrist-watch or intelligent bracelet, the detection portion is located intelligent wrist-watch or intelligent bracelet back.