CN111150384A

CN111150384A - Wearable device

Info

Publication number: CN111150384A
Application number: CN202010046758.4A
Authority: CN
Inventors: 王世育
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-05-15

Abstract

The invention relates to a wearable device comprising: an apparatus body; the test module is fixedly connected with the equipment body and used for transmitting and receiving optical signals and converting the received optical signals into electric signals; the analysis module is electrically connected with the test module and used for acquiring heart rate data according to the electric signal; the test module comprises a plurality of micron-sized photoelectric sensors and a plurality of light-emitting units, and each light-emitting unit comprises at least one micron-sized light-emitting diode. The invention is based on micron-sized light emitting diodes, can accurately set the number of the light emitting units and the light emitting diodes according to the light intensity requirement of actual test, and can reduce the gap between the adjacent light emitting units by tightly setting the plurality of light emitting units, thereby improving the light emitting uniformity, avoiding the influence of uneven light sources on the test result, and simultaneously combining a plurality of micron-sized photoelectric sensors to realize the wearable equipment with small volume and high precision heart rate test.

Description

Wearable device

Technical Field

The invention relates to the technical field of mobile intelligent equipment, in particular to wearable equipment.

Background

As is well known, the variation of the heart rate is closely related to the health condition of the human body, and the heart rate can directly reflect various cardiovascular and cerebrovascular diseases which may occur or are occurring, so that the monitoring of the heart rate becomes particularly important. In the medical field, an electrocardiograph monitor is generally used for heart rate monitoring, but the monitoring mode needs to provide a professional electrocardiograph monitor and also needs medical personnel with a professional heart rate detection technology, so that the heart rate monitoring efficiency is low and the flexibility is insufficient.

Along with the continuous development of scientific and technological, the rhythm of the heart monitoring function is also integrated gradually in various intelligent wearing equipment, like intelligent wrist-watch, intelligent bracelet etc.. In the field of intelligent wearable equipment, an electrocardiosignal measuring method is a commonly used heart rate monitoring method at present, the electrocardiosignal measuring method is used for testing according to potential changes at different moments in a heartbeat cycle, but when a tester sweats and the like, the conductivity of skin changes, so that a test result is influenced.

In order to reduce the influence of sweat on a test result, some wearable devices adopt a photoelectric transmission measurement method, and a photoelectric projection test method is based on the light absorption characteristic of blood, emits test light to skin through a light source, and obtains the light intensity reflected by the skin to perform a heart rate test. However, one or more light emitting diodes are usually arranged in the light source of the current wearable device, on one hand, the light emitting type of the light emitting diodes is approximately lambertian distribution type, the light intensity obtained at different positions is different, the light emitting uniformity is not good, and the accuracy of the test result is not sufficient; on the other hand, the LED has a large size, occupies the area of other devices, and is difficult to integrate the heart rate monitoring function into small-size wearable equipment.

Disclosure of Invention

Based on this, it is necessary to provide a wearable equipment to current wearing equipment carries out the not enough, the great problem of hardware volume of test precision of heart rate monitoring.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

a wearable device, comprising:

an apparatus body;

the test module is fixedly connected with the equipment body and used for transmitting and receiving optical signals and converting the received optical signals into electric signals;

the analysis module is electrically connected with the test module and used for acquiring heart rate data according to the electric signal;

the test module comprises a plurality of micron-sized photoelectric sensors and a plurality of light-emitting units, and each light-emitting unit comprises at least one micron-sized light-emitting diode.

In one embodiment, the plurality of light emitting units are arranged in a matrix.

In one embodiment, the number of the photoelectric sensors is the same as that of the light emitting units, the photoelectric sensors correspond to the light emitting units one by one, and the photoelectric sensors are embedded in the corresponding light emitting units.

In one embodiment, the test module further comprises an imaging unit disposed between the skin and the plurality of photosensors for imaging light emitted from the skin onto the plurality of photosensors.

In one embodiment, the imaging unit is an imaging template provided with a plurality of light through holes;

the analysis module comprises an image calculation unit, wherein a correction algorithm is preset in the image calculation unit, the correction algorithm corresponds to the imaging template, and the image calculation unit is used for acquiring a blood vessel image according to the electric signals output by the plurality of photoelectric sensors and the correction algorithm.

In one embodiment, the light emitting unit includes a micro-scale green diode.

In one embodiment, the light emitting unit further comprises a micron-sized infrared light diode.

In one embodiment, the light emitting unit further comprises a micron-sized red diode.

In one embodiment, the skin-facing side of the device body is provided with a recess for accommodating the test module and the analysis module.

In one embodiment, the wearable device further comprises a communication module for communicating with an external device.

The wearable device described above, comprising: an apparatus body; the test module is fixedly connected with the equipment body and used for transmitting and receiving optical signals and converting the received optical signals into electric signals; the analysis module is electrically connected with the test module and used for acquiring heart rate data according to the electric signal; the test module comprises a plurality of micron-sized photoelectric sensors and a plurality of light-emitting units, and each light-emitting unit comprises at least one micron-sized light-emitting diode. The invention is based on micron-sized light emitting diodes, can accurately set the number of the light emitting units and the light emitting diodes according to the light intensity requirement of actual test, and can reduce the gap between the adjacent light emitting units by tightly setting the plurality of light emitting units, thereby improving the light emitting uniformity, avoiding the influence of uneven light sources on the test result, and simultaneously combining a plurality of micron-sized photoelectric sensors to realize the wearable equipment with small volume and high precision heart rate test.

Drawings

Fig. 1 is a schematic structural diagram of a wearable device in an embodiment;

FIG. 2 is a diagram illustrating a partial structure of a test module in one embodiment;

FIG. 3 is a schematic diagram of a partial structure of a test module in another embodiment;

FIG. 4 is a schematic illustration of a position of an imaging unit in one embodiment;

FIG. 5 is a diagram illustrating the test results of a photosensor without an imaging unit;

FIG. 6 is a diagram illustrating test results of a photosensor provided with an imaging unit according to an embodiment;

FIG. 7 is a schematic diagram of an imaging template in one embodiment;

FIG. 8 is a block diagram of a test module including a light-emitting band in one embodiment;

FIG. 9 is a block diagram of a test module including two light emission bands according to an embodiment;

FIG. 10 is a block diagram of a test module including three light emission bands according to an embodiment;

FIG. 11 is a block diagram of a test module including four light-emitting bands according to an embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Fig. 1 is a schematic structural diagram of a wearable device in an embodiment, and as shown in fig. 1, the wearable device includes a device body 100, a test module 200, and an analysis module 300.

The device body 100 is ring-shaped and the inner diameter of the device body 100 is comparable to the size of a wearer's finger or wrist. Fig. 2 is a schematic view of a partial structure of the test module 200 in the present embodiment, and the structure of the rest of the test module 200, which is not shown, is similar to that of fig. 2, as shown in fig. 2, the test module 200 includes a plurality of micron-sized photosensors 210 and a plurality of light-emitting units 220, and each of the light-emitting units 220 includes at least one micron-sized light-emitting diode 221. The analysis module 300 is electrically connected to the test module 200 and configured to obtain heart rate data according to the electrical signal, and the analysis module 300 may be integrated in a control chip of a wearable device.

The principle of test heart rate is similar with traditional photoelectric transmission measurement method in this embodiment, through light source to skin transmission test light promptly, because blood has the extinction characteristic, and the blood flow in the different moments blood vessel is different, then the light intensity that is absorbed and is reflected by blood at different moments can produce corresponding fluctuation, through the light intensity that obtains human reflection, can calculate the blood flow and the change condition of heart rate at corresponding moments.

However, the present embodiment achieves smaller volume and test accuracy than the conventional wearable device by a special element configuration. In the prior art, a millimeter-sized light emitting diode is generally used as a test light source, the micron-sized light emitting diode 221 is used as the test light source in the embodiment, and the light intensity of a single micron-sized light emitting diode 221 is smaller than that of a single millimeter-sized light emitting diode, so that the number of the light emitting units 220 and the number of the light emitting diodes 221 can be accurately set according to the light intensity requirement of actual test, thereby avoiding the problems of overflow and overlarge occupied space of the light intensity of the millimeter-sized light emitting diode, and fundamentally reducing the occupied space of the light source.

Further, since each of the light emitting diodes 221 receives the control signal independently of each other, the number of the light emitting diodes 221 to be lit can be specifically adjusted depending on the usage scenario. For example, when the external ambient light is strong, the number of the lit leds 221 may be increased, thereby reducing the influence of the ambient light on the test result; when the external ambient light is weak, the number of the light emitting diodes 221 to be lit may be reduced, thereby reducing the power consumption of the wearable device. Therefore, the light intensity adjustment flexibility of the light emitting unit 220 of the wearable device in the present embodiment is higher, and the reduction of power consumption can achieve longer standby time and smaller battery requirements.

Moreover, based on the led 221 with an extremely small size, the light emitting units 220 can be arranged closely, the gap between adjacent light emitting units 220 can be reduced, the light emitting uniformity of the light source can be improved, and the deviation between the light intensities obtained from different positions can be smaller than the set threshold, thereby reducing the influence of the light source on the test result. Meanwhile, the photoelectric measurement extending from a point to a surface can be realized based on the micron-sized photoelectric sensor 210, and the light intensity distribution conditions of different areas can be acquired more accurately. In one example, the light emitting cells 220 are arranged in a matrix, and compared with other arrangements, the light emitting cells 220 arranged in a matrix have lower manufacturing difficulty and simpler control circuit and control logic.

In one embodiment, the number of the photosensors 210 is the same as the number of the light emitting units 220, and the photosensors 210 correspond to the light emitting units 220 one to one. It can be understood that, on the premise that the total volume occupied by the plurality of photoelectric sensors 210 and the plurality of light-emitting units 220 in the wearable device is not changed, if the number of the photoelectric sensors 210 is large, a higher test resolution can be achieved; if the number of the light emitting units 220 is large, a higher light emitting intensity can be realized, so that the signal to noise ratio is improved, and the influence of stray light on the test result is reduced. Therefore, the number relationship between the photo sensor 210 and the light emitting unit 220 in this embodiment can better balance the test resolution and the signal-to-noise ratio of the wearable device. In one example, as shown in fig. 3, the photosensors 210 are embedded in the corresponding light-emitting units 220.

In another embodiment, as shown in fig. 2, the number of the photosensors 210 is less than the number of the light emitting units 220, a gap with a set width is provided between adjacent light emitting units 220, and the photosensors 210 are provided in the gap.

In one embodiment, the testing module 200 further includes an imaging unit 230, as shown in fig. 4, the imaging unit 230 is disposed between the skin and the plurality of photo sensors 210, and is used for imaging the light emitted from the skin on the plurality of photo sensors 210. Based on the test module 200 without the imaging unit 230, the photo sensors 210 can only obtain the brightness data of the corresponding test area, but cannot obtain a clear blood vessel distribution image, for example, if the test module 200 includes M × N photo sensors 210 arranged in a matrix, according to the test results of the plurality of brightness data, only a brightness distribution diagram as shown in fig. 5 can be obtained, in which each small square in the diagram represents one photo sensor 210, and different filling manners of the small squares represent different brightness test results. In the present embodiment, by providing the imaging unit 230, a blood vessel distribution image as shown in fig. 6 can be obtained according to the light intensity test result of the photosensor 210. Through the blood vessel distribution image, the blood flowing conditions in different blood vessels can be known, and meanwhile, the extended functions such as vein recognition and the like can be realized according to the blood vessel distribution image.

In one embodiment, the imaging unit 230 is an imaging template 231, as shown in fig. 7, the imaging template 231 is provided with a plurality of light passing holes 2311; the analysis module 300 includes an image calculation unit, which is preset with a correction algorithm corresponding to the imaging template 231, and is configured to obtain a blood vessel distribution image according to the electrical signals output by the plurality of photosensors 210 and the correction algorithm. The principle of obtaining the blood vessel distribution image based on the imaging template 231 is that after the reflected light from the skin passes through the imaging template 231 provided with the plurality of light passing holes 2311, a corresponding pattern is projected on the surface of the photoelectric sensor 210, the projected pattern reflects the light emitting position and the light intensity of the reflected light, the projected patterns are different in position, the patterns projected on the surface of the photoelectric sensor 210 are different, the photoelectric sensor 210 receives the superposed patterns, and since the correction algorithm is corresponding to the imaging template 231, the light emitting intensities of the reflected light at different positions can be obtained reversely through the correction algorithm according to the data received by the photoelectric sensor 210, so that the blood vessel distribution image is obtained. The thickness and weight of the imaging template 231 of the embodiment are better than those of other imaging elements such as a lens, and therefore, the imaging template is more suitable for small-size wearable equipment.

In one embodiment, as shown in fig. 8, the light emitting unit 220 includes a micro-scale green diode 2211. The absorption rate of the melanin in the skin and the hemoglobin in the blood to the green light is higher, so that on the premise that the light intensity of incident light is the same, the light intensity fluctuation amplitude of reflected light of the green light is larger after being absorbed by a human body, and moreover, the green light in stray light is easier to be absorbed by the human body, so that green light signals in the stray light are fewer, the corresponding signal-to-noise ratio is higher, and the anti-interference capability of the green light is better than that of test light of other wave bands. In one example, the green diode 2211 emits light in the range of 500nm to 540nm, such as 520 nm.

In one embodiment, as shown in fig. 9, the light emitting unit 220 further includes a micron-sized infrared photodiode 2212. Because the human body has stronger absorption capacity to the green light, the corresponding green light has weaker penetrating capacity in the human body, and the green light is not suitable for people with darker skin colors, because when the proportion of the green light absorbed by the skin is higher than that of the green light absorbed by blood, the test result cannot truly reflect the heart rate change of the human body. The penetration capability of infrared light is superior to that of green light, and when vein recognition and other test items with higher requirements on penetration depth are carried out, the infrared light can obtain better test results, so that the characteristics of human body blood vessel distribution are better reflected. In one example, the light emitting range of the infrared photodiode 2212 is near infrared light, i.e. 770nm to 800 nm. It should be noted that the arrangement and the position of the green light diode 2211 and the infrared light diode 2212 in the light emitting unit 220 are not limited in this embodiment.

In one embodiment, as shown in fig. 10, the light emitting unit 220 further includes a micron-sized red diode 2213. Compare the infrared light, ruddiness' wavelength is shorter, and corresponding degree of depth and the precision of hitting the skin are higher, and are difficult for receiving the interference, consequently when using functions such as vein identification, ruddiness can supplement the infrared light to acquire more accurate test result. In one example, the red diode 2213 emits light in the range of 610nm to 650nm, such as 630 nm. It should be noted that the arrangement and the position of the green light diode 2211, the infrared light diode 2212 and the red light diode 2213 in the light emitting unit 220 are not limited in this embodiment.

In one embodiment, as shown in fig. 11, the light emitting unit 220 further includes a micron-sized blue light diode 2214, so as to improve the aesthetic appearance of the whole structure of the light emitting unit 220. Alternatively, the green diode 2211, the infrared diode 2212, the red diode 2213 and the blue diode 2214 may be different in size, so as to set the light emitting diodes of corresponding sizes according to the actual light intensity requirements for different colors of light. It should be noted that the arrangement and the position of the green diode 2211, the infrared diode 2212, the red diode 2213 and the blue diode 2214 in the light emitting unit 220 are not limited in this embodiment.

In an embodiment, wearable equipment still includes the acceleration module, when the people ran and so on strenuous exercise, wearable equipment can take place regular relative position with skin and change, and this change probably disturbs the result of heart rate test, consequently, in this embodiment the acceleration module can with the heart rate data that test module 200 obtained combine together, reject the interference of limbs and rock to the test result to acquire more accurate heart rate test result.

In one embodiment, the skin-facing side of the device body 100 is provided with a recess for receiving the test module 200 and the analysis module 300. In this embodiment, the testing module 200 and the analyzing module 300 are disposed in the groove of the device body 100, so that the tops of the testing module 200 and the analyzing module 300 are flush with the surface of the device body 100, thereby avoiding the problems of reduced wearing comfort and accidental damage of the modules due to external force caused by the excessively protruding testing module 200 and the analyzing module 300. It is also critical that the gap between the inside of the wearable device and the skin be reduced to avoid the problem of stray light from entering the test module 200 from the gap, thereby ensuring the accuracy of the test. In another embodiment, the test module 200 and the analysis module 300 may also be disposed on the surface of the device body 100 away from the skin of the wearer, so as to be used in the external active touch test scenario.

In an embodiment, the wearable device further includes a communication module for communicating with an external device. The heart rate test result can be sent to other external equipment through the communication module, so that long-time heart rate recording and monitoring are realized; the communication module can also send the vein identification result obtained by the wearable device to other devices, so that the scenes of door lock opening, payment and the like needing safety confirmation are realized, and the rapidness of related operations is improved.

In one embodiment, the wearable device further comprises a bio-impedance module, which is a supplement to the testing module 200, and can test the heart rate by electrocardiographic measurement when the human body does not sweat. In one embodiment, the wearable device further comprises a vibration motor module, so that the wearable device can give an alarm in a vibration mode according to set logic. In one embodiment, the wearable device further comprises a floating touch module, so that the problem that the contact touch easily causes fingerprints and oil stains on the surface of the wearable device is avoided.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A wearable device, comprising:

an apparatus body;

2. The wearable device according to claim 1, wherein the plurality of light emitting cells are arranged in a matrix.

3. The wearable device according to claim 2, wherein the number of the photoelectric sensors is the same as the number of the light-emitting units, the photoelectric sensors are in one-to-one correspondence with the light-emitting units, and the photoelectric sensors are embedded in the corresponding light-emitting units.

4. The wearable device of claim 1, wherein the test module further comprises an imaging unit disposed between the skin and the plurality of photosensors for imaging light emitted by the skin onto the plurality of photosensors.

5. The wearable device according to claim 4, wherein the imaging unit is an imaging template provided with a plurality of light passing holes;

6. The wearable device according to any of claims 1-5, wherein the light emitting unit comprises a micron-sized green diode.

7. The wearable device of claim 6, wherein the light emitting unit further comprises a micro-scale infrared light diode.

8. The wearable device according to any of claims 7, wherein the light emitting unit further comprises a micron-scale red light diode.

9. The wearable device of claim 1, wherein the device body is provided with a recess on a skin-facing side for receiving the testing module and the analysis module.

10. The wearable device of claim 1, further comprising a communication module for communicating with an external device.