Wearable device and method for detecting human physiological information

Abstract

The present application discloses a wearable device and a method for detecting human physiological information, wherein the wearable device includes a wearable device body, a fixing belt detachably connected to the wearable device body, a light receiver, a microprocessor and a light-emitting component, wherein the light-emitting component is arranged on the surface of the side of the fixing belt in contact with human skin in a specified manner, and is used to generate one or more light signals; the light receiver is arranged at the bottom of the wearable device body, and is used to receive one or more light signals after being transmitted through human skin, and output electrical signals to the microprocessor. The wearable device can realize transmissive optical detection.

Description

Technical Field

[0001] The present application relates to the technical field of wearable devices, and in particular to a wearable device and a method for detecting human physiological information thereof. Background Art

[0002] Due to the positional layout of the light emitting device and the light receiving device, the vast majority of wearable devices on the market (such as smart bracelets) currently use reflective photoelectric methods (i.e. reflective optical detection) to monitor human physiological information (such as heart rate), while transmissive optical detection (such as blood oxygen detection) is more difficult to implement on wearable devices.

[0003] Therefore, how to realize transmissive optical detection on wearable devices is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The main purpose of this application is to provide a wearable device and a method for detecting human physiological information, aiming to solve the problem in the prior art that it is difficult to implement transmissive optical detection on wearable devices.

[0005] The present application proposes a wearable device, comprising a wearable device body, a fixing belt detachably connected to the wearable device body, a light receiver, a microprocessor and a light-emitting component, wherein:

[0006] The light emitting component is arranged on the surface of the side of the fixing belt that contacts the human skin in a specified manner, and is used to generate one or more light signals;

[0007] The optical receiver is disposed at the bottom of the wearable device body, and is used to receive one or more optical signals after being transmitted through human skin, and output electrical signals to a microprocessor.

[0008] Furthermore, the light emitting assembly includes at least two light emitters with different fixed light emitting angles, and the light emitters are arranged in sequence along the length direction of the fixing belt and there are specified intervals between the light emitters.

[0009] Furthermore, the light emitting angle of the light emitter includes 5° to 20°.

[0010] Furthermore, the aforementioned wearable device also includes a controller, which is connected to the light-emitting component and is used to control the light-emitting operation of the light-emitting component.

[0011] Furthermore, the light emitting assembly includes at least one first light emitter having a variable light emitting angle.

[0012] Furthermore, the light-emitting component includes at least one first light emitter and at least one second light emitter with a fixed light-emitting angle, the first light emitter and the second light emitter are arranged in sequence along the length direction of the fixed belt, and there is a specified interval between the first light emitter and the second light emitter.

[0013] Furthermore, the first light emitter includes a light source and an angle adjuster, and the controller is connected to the light source and the angle adjuster respectively; the angle adjuster is arranged opposite to the light source and is used to adjust the light emitting angle of the light source.

[0014] Furthermore, the angle adjuster includes one of a liquid lens and a variable focal length microlens.

[0015] Furthermore, the fixing strap includes a first fixing strap and a second fixing strap, the wearable device body is detachably connected to one end of the first fixing strap and one end of the second fixing strap respectively, the light receiver is arranged near the connection between the wearable device body and the first fixing strap, and the light-emitting component is arranged on the side surface of the first fixing strap that contacts the human skin.

[0016] Furthermore, the wearable device is a smart watch or a smart bracelet, the wearable device body is a watch dial, and the fixing band is a watch strap.

[0017] Furthermore, the aforementioned wearable device also includes a pressure sensor, which is connected to the controller and is used to detect the pressure between the wearable device and human skin.

[0018] Furthermore, the aforementioned wearable device also includes an operational amplifier, an analog-to-digital converter and a display, the optical receiver is connected to the operational amplifier through a controller, the operational amplifier is connected to the microprocessor through the analog-to-digital converter, and the display is connected to the microprocessor.

[0019] The present application also proposes a method for detecting physiological information of the human body, which is applied to a wearable device, wherein the wearable device includes a wearable device body, a fixing belt detachably connected to the wearable device body, a light receiver, a microprocessor, a controller, and a light emitting component, wherein the light emitting component is arranged on a surface of a side of the fixing belt in contact with human skin in a specified manner, and is used to generate one or more light signals; the light receiver is arranged at the bottom of the wearable device body, and is used to receive one or more light signals after being transmitted through human skin, and output an electrical signal to the microprocessor; the controller is connected to the light emitting component, and is used to control the light emitting operation of the light emitting component; the method includes:

[0020] The controller starts the light-emitting component in a predetermined manner to illuminate human skin with one or more light signals emitted by the light-emitting component;

[0021] Receiving one or more optical signals after being transmitted through human skin through an optical receiver, and converting the optical signals into electrical signals;

[0022] The electrical signals are processed by a microprocessor to obtain physiological information of the human body.

[0023] Furthermore, the light-emitting assembly includes at least two light emitters with different fixed light-emitting angles, each light emitter is arranged in sequence along the length direction of the fixed belt and there is a specified interval between each light emitter, and the step of starting the light-emitting assembly in a predetermined manner by the controller includes:

[0024] The controller turns on each light emitter in sequence at predetermined intervals.

[0025] Furthermore, the optical receiver is connected to the controller, and after the step of receiving one or more optical signals transmitted through human skin by the optical receiver and converting the optical signals into electrical signals, the method further includes:

[0026] The controller receives a plurality of electrical signals output by the optical receiver, and selects the electrical signal with the highest signal strength from the plurality of electrical signals;

[0027] The electrical signal with the highest signal strength is transmitted to the microprocessor.

[0028] Furthermore, the optical receiver is connected to the controller, and after the step of receiving one or more optical signals transmitted through human skin by the optical receiver and converting the optical signals into electrical signals, the method further includes:

[0029] The controller receives an electrical signal output by the optical receiver, and determines whether the signal strength of the current electrical signal reaches a preset threshold;

[0030] If the signal strength of the current electrical signal reaches a preset threshold, the current electrical signal is transmitted to the microprocessor, and the remaining light emitters are stopped from turning on through the controller.

[0031] Furthermore, after the step of receiving an electrical signal output by the optical receiver through the controller and determining whether the signal strength of the current electrical signal reaches a preset threshold, the method further includes:

[0032] If the signal strength of the current electrical signal does not reach the preset threshold, the controller turns off the light emitter that is currently on, and turns on the remaining light emitters in sequence until the signal strength of the electrical signal corresponding to one of the light emitters reaches the preset threshold.

[0033] Furthermore, the light emitting assembly includes at least one first light emitter with a variable light emitting angle, and the light receiver is connected to the controller. After the light receiver receives one or more light signals transmitted through human skin and converts the light signals into electrical signals, the method further includes:

[0034] The controller receives an electrical signal output by the optical receiver, and determines whether the signal strength of the electrical signal reaches a preset threshold, wherein the electrical signal corresponds to the first light emitter that is turned on earliest;

[0035] If the signal strength of the electrical signal does not reach the preset threshold, the light emitting angle of the first light emitter is controlled by the controller until the signal strength of the electrical signal reaches the preset threshold.

[0036] Furthermore, the light-emitting assembly includes at least one first light emitter and at least one second light emitter with a fixed light-emitting angle, the first light emitter and the second light emitter are arranged in sequence along the length direction of the fixed belt, and there is a specified interval between the first light emitter and the second light emitter, and after the step of controlling the light-emitting angle of the first light emitter by the controller until the signal strength of the electrical signal reaches a preset threshold, it also includes:

[0037] Determine by the controller whether the signal strength of the electrical signal within a preset time period reaches a preset threshold;

[0038] If the signal strength of the electrical signal does not reach the preset threshold within the preset time period, the controller turns off the first light emitter that was turned on earliest, and turns on the second light emitter or the remaining first light emitters in turn until the signal strength of the electrical signal corresponding to one of the first light emitters or the second light emitters reaches the preset threshold.

[0039] Further, the physiological information includes one or more of heart rate, blood pressure, blood oxygen saturation, red blood cell mass and blood flow rate.

[0040] Furthermore, the aforementioned method for detecting human physiological information further includes:

[0041] The controller receives a start instruction input by a user, and executes the step of starting the light-emitting component in a predetermined manner according to the start instruction.

[0042] Furthermore, the wearable device further includes a pressure sensor, which is connected to the controller and is used to detect the pressure between the wearable device and human skin; the aforementioned method for detecting human physiological information also includes:

[0043] The controller obtains the pressure value detected by the pressure sensor and determines whether the pressure value exceeds a preset pressure threshold;

[0044] If the pressure value exceeds the preset pressure threshold, the step of starting the light emitting component in a predetermined manner is executed.

[0045] The beneficial effect of the present application is that the wearable device proposed in the present application arranges a light-emitting component that can emit one or more light signals on a fixed belt, and arranges a light receiver on the bottom of the wearable device body, so that the position layout of the light-emitting component and the light receiver can adapt to different users, ensuring that the light signal emitted by the light-emitting component can reach the light receiver through the hand muscles, and then optical detection can be performed based on the received light signal, thereby realizing transmissive optical detection on the wearable device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the structural principle of a wearable device in an implementation of the present application;

[0047] Figure 2 is a schematic diagram of the structural principle of a wearable device in another embodiment of the present application;

[0048] Figure 3 is a schematic diagram of the use of the wearable device when the wrist is large or worn loosely in an implementation of the present application;

[0049] Figure 4 is a schematic diagram of the use of the wearable device when the wrist is small or worn tightly in another embodiment of the present application;

[0050] Figure 5 is a schematic diagram of the structure of the wearable device after it is unfolded in the first embodiment of the present application;

[0051] Figure 6 It is a flowchart of a method for detecting human physiological information using a wearable device in an embodiment of the present application.

[0052] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] Reference Figure 1 , an embodiment of the present application proposes a wearable device, comprising a wearable device body 1, a fixing strap 2 detachably connected to the wearable device body 1, a light receiver 4, a microprocessor 5 and a light emitting component 3, wherein the light emitting component 3 is arranged on a surface of a side of the fixing strap 2 in contact with human skin in a specified manner, for generating one or more light signals; the light receiver 4 is arranged at the bottom of the wearable device body 1, for receiving one or more light signals after being transmitted through human skin, and outputting electrical signals to the microprocessor 5.

[0055] In this embodiment, the wearable device is a smart watch or a smart bracelet, the wearable device body is a dial, the fixing strap is a strap, and the light signal generated by the light emitting component 3 is one or more of a red light signal, a green light signal and an infrared light signal. The type of light signal depends on the actual use requirements. For example, for the detection of heart rate, a green light signal is required, while for the detection of blood oxygen saturation, a red light signal and an infrared light signal are required. Therefore, generally, in order to meet different use requirements and obtain more physiological information, the light emitting component 3 can integrate light emitting diodes of multiple colors, such as green light LED, red light LED, infrared light LED, etc.; the light receiver 4 is an electronic device such as a photodiode, a phototransistor, etc. that can convert light signals into electrical signals; the specific position of the light emitting component 3 on the fixing strap 2 and the specific position of the light receiver 4 on the bottom of the wearable device body 1 are not specifically limited, as long as it can be ensured that at least one of the light signals generated by the light emitting component 3 can reach the light receiver 4; specifically, the working principle of the wearable device is as follows:

[0056] After the light emitting component 3 is started, the light emitting component 3 generates one or more light signals, which are transmitted through the human skin and then scattered to the light receiver 4. Since the wrist size of each user is different and the tightness of the wearer is different, the intensity and quantity of the light signals received by the light receiver 4 will also be different. For example, some light signals cannot reach the light receiver 4 or only partially reach the light receiver 4 due to the obstruction of the arm bone 12. When the light receiver 4 receives the light signal from the light emitting component 3, the light receiver 4 converts the light signal into an electrical signal and transmits it to the microprocessor 5 for processing, thereby realizing transmissive optical detection and obtaining heart rate, blood pressure, blood oxygen saturation It should be noted here that for the microprocessor 5, mature products currently on the market can be used, and the common programs that come with these mature products can be used to implement its data processing process, and there is no need to rely on new programs to implement it. For example, when the microprocessor 5 receives multiple electrical signals, in order to improve the accuracy and reliability of the detection, the microprocessor 5 can select the electrical signal with the highest signal-to-noise ratio from the multiple electrical signals, and select the electrical signal with the highest signal-to-noise ratio to extract and analyze the physiological information of the human body; in the specific implementation, microprocessors 5 of models such as STM32 series and MTK series can be used.

[0057] In this embodiment, the wearable device arranges a light-emitting component 3 that can emit one or more light signals on a fixing belt 2, and arranges a light receiver 4 on the bottom of the wearable device body 1, so that the position layout of the light-emitting component 3 and the light receiver 4 can adapt to different users, ensuring that the light signal emitted by the light-emitting component 3 can pass through the hand muscles 11 to reach the light receiver 4, and then optical detection can be performed based on the received light signal, thereby realizing transmissive optical detection on the wearable device.

[0058] Reference Figures 2 to 4 In an optional embodiment, the light emitting assembly 3 includes at least two light emitters with different fixed light emitting angles, and the light emitters are arranged in sequence along the length direction of the fixing belt 2 and there are specified intervals between the light emitters.

[0059] In this embodiment, a general light-emitting diode can be used as a light emitter, wherein the light-emitting angle of the light emitter includes 5° to 20°. For example, the light-emitting angle of some light emitters can be 5°, the light-emitting angle of some light emitters can be 10°, the light-emitting angle of some light emitters can be 15°, and so on. Since the fixing belt 2 is in a bent state when the wearable device is worn, in order to adapt to wrists of different sizes and wearing conditions of different tightnesses, it is ensured that light signals can be scattered to the light receiver 4. Therefore, light emitters with different light-emitting angles can be arranged in sequence along the length direction of the fixing belt 2. In this way, when the size of the wrist changes or the wearing tightness changes, causing some light signals that could have been received by the light receiver 4 to fail to reach the light receiver 4, the light signals generated by other light emitters can be used as "compensation", thereby ensuring that the transmission-type optical detection will not be unavailable due to the unavailability of light signals generated by some light emitters. In addition, there is a specified interval between each light emitter, which can avoid large interference between light signals and affect the accuracy and reliability of detection.

[0060] Reference Figure 2In a preferred embodiment, the wearable device further comprises a controller 6, which is connected to the light emitting component 3 and is used to control the light emitting operation of the light emitting component 3, wherein the controller 6 and the light emitting component 3 can be communicated with each other by wired or wireless means (such as Bluetooth). Thus, by adding the controller 6, the light emitting operation of the light emitting component 3 can be intelligently controlled. For example, generally, after the wearable device is worn on the wrist, the user can select the physiological information to be measured by performing relevant touch operations on the wearable device. When the controller 6 receives the relevant instructions generated by the user through the touch operation, the controller 6 controls the light emitting component 3 to start. Thus, the user can start the light emitting component 3 at any time according to the actual use needs to perform transmissive optical detection and obtain his own physiological information, thereby improving the flexibility of the use of the wearable device. The controller 6 can adopt a microcontroller of the STM32L series (specific models such as STM32L496AG I 6, etc.), and of course, other types of microcontrollers can also be used as the controller 6, as long as they can meet the use requirements, and there is no specific restriction on this.

[0061] Reference Figures 2 to 4 In another optional embodiment, the light-emitting component 3 includes at least one first light emitter with a variable light-emitting angle, and the light receiver 4 is connected to the microprocessor 5 through the controller 6. The controller 6 is specifically used to control the light-emitting angle of the first light emitter when it is detected that one or more electrical signals output by the light receiver 4 do not meet the detection requirements (such as the intensity of the electrical signal is too weak, or the signal-to-noise ratio of the electrical signal is too low). In this way, when the light signal initially emitted by the first light emitter cannot reach the light receiver 4 or only partially reaches the light receiver 4 due to the obstruction of the arm bone 12, it can be improved by changing the light-emitting angle of the first light emitter. Therefore, a first light emitter with a variable light-emitting angle can play the same role as a plurality of light emitters with fixed light-emitting angles, which is beneficial to reduce hardware investment and reduce the processing cost of the fixing belt 2. Here, those skilled in the art can understand that as long as the position of the light receiver 4 on the wearable device body 1 and the position of the first light emitter are arranged appropriately enough, only one first light emitter needs to be set, and the light-emitting angle can be changed to ensure that the generated light signal reaches the light receiver 4.

[0062] Reference Figures 2 to 4 In another optional embodiment, the light-emitting component 3 includes at least one first light emitter and at least one second light emitter having a fixed light-emitting angle. The first light emitter and the second light emitter are arranged in sequence along the length direction of the fixing belt 2, and there is a specified interval between the first light emitter and the second light emitter.

[0063] In this embodiment, a general light-emitting diode can be used as the second light emitter, wherein the light-emitting angle of the second light emitter includes 5° to 20°. Since the fixing belt 2 is in a bent state when the wearable device is worn, in order to adapt to wrists of different sizes and wearing conditions of different tightness, to ensure that the light signal can be scattered to the light receiver 4, the first light emitter and the second light emitter can be arranged in sequence along the length direction of the fixing belt 2. In this way, when the size of the wrist changes or the wearing tightness changes, resulting in the light signal generated by the first light emitter or the second light emitter failing to reach the light receiver 4, the first light emitter The first light emitter and the second light emitter can "compensate" for each other with light, thereby ensuring that transmissive optical detection is not impossible to achieve due to the unavailability of the light signal generated by the first light emitter or the second light emitter. Moreover, there is a specified interval between the first light emitter and the second light emitter, which can avoid large interference between the light signals and affect the accuracy and reliability of the detection. In addition, since the hardware cost of the first light emitter is generally higher than the hardware cost of the second light emitter, in this embodiment, transmissive optical detection is achieved by matching the first light emitter with the second light emitter, while taking into account the hardware investment cost and the processing cost of the fixing belt 2.

[0064] In an optional embodiment, the first light emitter includes a light source (not shown in the figure) and an angle adjuster (not shown in the figure), and the controller 6 is connected to the light source and the angle adjuster respectively; the angle adjuster is arranged opposite to the light source, and is used to adjust the light-emitting angle of the light source; wherein the angle adjuster includes one of a liquid lens using an electrowetting unit and a variable-focus microlens of a liquid crystal. Since the structures of the liquid lens and the variable-focus microlens are well known, their detailed descriptions are omitted.

[0065] In this embodiment, specifically, when one or more electrical signals output by the optical receiver 4 do not meet the detection requirements (such as the intensity of the electrical signal is too weak, or the signal-to-noise ratio of the electrical signal is too low), the controller 6 adjusts the light-emitting angle of the light source by controlling the angle adjuster, thereby making the light-emitting angle of the first light emitter variable.

[0066] Reference Figure 1 and Figure 5 In an optional embodiment, the fixing strap 2 includes a first fixing strap 212 and a second fixing strap 222, the wearable device body 1 is detachably connected to one end of the first fixing strap 212 and one end of the second fixing strap 222, respectively, the light receiver 4 is arranged near the connection between the wearable device body 1 and the first fixing strap 212, and the light-emitting component 3 is arranged on the surface of the side of the first fixing strap 212 that contacts the human skin.

[0067] In this embodiment, since each user's wrist size is different and the tightness of wearing is also different, if the position of the light-emitting component 3 on the fixing strap 2 is too centered, the light signal generated by the light-emitting component 3 may encounter the arm bone 12 and fail to penetrate. Therefore, the light receiver 4 can be arranged close to the connection between the wearable device body 1 and the first fixing strap 212, and the light-emitting component 3 is arranged on the surface of the side of the first fixing strap 212 that contacts the human skin. In this way, one or more light signals generated by the light-emitting component 3 can avoid the arm bone 12 to the greatest extent and reach the light receiver 4, which is beneficial to reduce the number of light emitters on the light-emitting component 3 and save hardware investment costs.

[0068] Reference Figure 2 In an optional embodiment, the aforementioned wearable device further includes a pressure sensor 7, which is connected to the controller 6 and is used to detect the pressure between the wearable device and human skin.

[0069] In this embodiment, preferably, the pressure sensor 7 is arranged on the bottom of the wearable device body 1, which is conducive to detecting the pressure between the wearable device and the human skin. Specifically, when the pressure value detected by the pressure sensor 7 reaches a preset pressure threshold, it indicates that the wearable device is in a wearing state. At this time, the light-emitting component 3 can be started by the controller 6, and then a transmissive optical detection can be performed to obtain the physiological information of the human body, thereby avoiding the trouble of manual operation and improving the user experience.

[0070] Reference Figure 2 In an optional embodiment, the wearable device further includes an operational amplifier 8, an analog-to-digital converter 9 and a display 10, the optical receiver 4 is connected to the operational amplifier 8 through the controller 6, the operational amplifier 8 is connected to the microprocessor 5 through the analog-to-digital converter 9, and the display 10 is connected to the microprocessor 5 operational amplifier 8 analog-to-digital converter 9 display 10 optical receiver 4 operational amplifier 8 analog-to-digital converter 9 display 10 microprocessor 5 analog-to-digital converter 9.

[0071] In this embodiment, specifically, the optical connector converts the optical signal from the light-emitting component 3 into an electrical signal and transmits it to the controller 6. The controller 6 transmits the electrical signal that meets the detection requirements to the operational amplifier 8 for amplification. The analog-to-digital converter 9 then converts the amplified electrical signal into a digital signal. The microprocessor 5 then processes the digital signal and transmits it to the display 10 for display, so that the user can obtain his or her own physiological information.

[0072] Reference Figure 2 and Figure 6 The embodiment of the present application also proposes a method for detecting human physiological information, which is applied to the aforementioned wearable device, and the method includes:

[0073] S1, starting the light-emitting component 3 in a predetermined manner through the controller 6, so as to illuminate the human skin with one or more light signals emitted by the light-emitting component 3;

[0074] S2, receiving one or more optical signals after being transmitted through human skin through the optical receiver 4, and converting the optical signals into electrical signals;

[0075] S3, the electrical signal is processed by the microprocessor 5 to obtain physiological information of the human body.

[0076] In the above S1, when in use, the light emitting component 3 can be started by the controller 6, and then the light emitting component 3 can be controlled to emit one or more light signals in a predetermined manner.

[0077] In the above S2, specifically, after the light-emitting component 3 is started by the controller 6, one or more light signals that are transmitted through the human skin can be received by the light receiver 4. Since each user has a different wrist size and wears the light differently, the intensity and quantity of the light signals received by the light receiver 4 will also vary. For example, some light signals cannot reach the light receiver 4 or only partially reach the light receiver 4 due to being blocked by the arm bone 12. After the light receiver 4 receives the light signal from the light-emitting component 3, the light receiver 4 converts the light signal into an electrical signal and transmits it to the microprocessor 5.

[0078] In the above S3, the above physiological information includes one or more of heart rate, blood pressure, blood oxygen saturation, red blood cell count and blood flow rate. The process of obtaining the physiological information of the human body by processing the electrical signal through the microprocessor 5 is a very mature and well-known technology in the art, which will not be described in detail.

[0079] In this embodiment, the method for detecting human physiological information controls the light-emitting component 3 arranged on the fixing belt 2 through the controller 6 to generate one or more light signals to illuminate the human skin, and then receives the one or more light signals after passing through the human skin through the light receiver 4 arranged at the bottom of the wearable device body 1, and converts the light signal into an electrical signal, and then processes the electrical signal by the microprocessor 5 to obtain the physiological information of the human body, thereby realizing the wearable device's detection of the human physiological information in a transmission manner.

[0080] In an optional embodiment, when the light emitting assembly 3 includes at least two light emitters with different fixed light emitting angles, the step of starting the light emitting assembly 3 in a predetermined manner by the controller 6 includes:

[0081] S11, the controller 6 turns on each light emitter in sequence at a predetermined time interval.

[0082] In this embodiment, the predetermined time can be 0.5 seconds, 1 second, 1.5 seconds, etc., and there is no specific limitation on this. Each light emitter is turned on in turn at predetermined intervals, so that the time for each light signal to reach the light receiver 4 is different. This can avoid mutual interference between light signals and affect the accuracy of optical detection, which is beneficial to improving the accuracy of human physiological information detection.

[0083] Reference Figure 2 and Figure 6 In an optional embodiment, when the light emitting assembly 3 includes at least two light emitters with different fixed light emitting angles, after the step of receiving one or more light signals transmitted through human skin by the light receiver 4 and converting the light signals into electrical signals, the method further includes:

[0084] S201, receiving multiple electrical signals output by the optical receiver 4 through the controller 6, and selecting the electrical signal optical receiver 4 with the highest signal strength from the multiple electrical signals;

[0085] S202, transmitting the electrical signal with the highest signal strength to the microprocessor 5.

[0086] In this embodiment, since the light emitters are close to each other, the signal noise factor can be ignored. Therefore, the electrical signal with the highest signal strength is selected from multiple electrical signals. This will not affect the accuracy of optical detection, but also omit the process of calculating the signal-to-noise ratio in the prior art, which is beneficial to improving the efficiency of optical detection of the optical receiver 4.

[0087] Reference Figure 2 , Figure 3 , Figure 4 and Figure 6 In another optional embodiment, when the light emitting assembly 3 includes at least two light emitters with different fixed light emitting angles, after the step of receiving one or more light signals transmitted through human skin by the light receiver 4 and converting the light signals into electrical signals, the method further includes:

[0088] S211, receiving an electrical signal output by the optical receiver 4 through the controller 6, and determining whether the signal strength of the current electrical signal reaches a preset threshold value of the optical receiver 4;

[0089] If the signal strength of the current electrical signal reaches the preset threshold, S212 is executed to transmit the current electrical signal to the microprocessor 5 , and the controller 6 stops turning on the remaining light emitter controllers 6 .

[0090] If the signal strength of the current electrical signal does not reach the preset threshold, execute S213, turn off the light emitter that is currently in the on state through the controller 6, and turn on the remaining light emitters in turn until the signal strength of the electrical signal corresponding to one of the light emitters reaches the preset threshold.

[0091] In the above S211, specifically, the light receiver 4 controller 6 controls each light emitter to turn on in sequence at a predetermined interval. When the controller 6 receives an electrical signal corresponding to a certain light emitter (that is, the light signal emitted by a certain light emitter is received by the light receiver 4 and converted into an electrical signal, and then transmitted to the controller 6 by the light receiver 4), the controller 6 first determines whether the signal strength of the electrical signal reaches a preset threshold. If the signal strength of the electrical signal reaches the preset threshold, it indicates that the electrical signal meets the detection requirements, and the electrical signal can be transmitted to the microprocessor 5 for processing.

[0092] In the above S212, when the signal strength of the electrical signal corresponding to a certain light emitting device reaches a preset threshold, the electrical signal can be directly transmitted to the microprocessor 5 for processing, and there is no need to turn on the remaining light emitting devices. For example, assuming that three light emitting devices are arranged on the fixing belt 2, when the second light emitting device is turned on, the signal strength of the electrical signal corresponding to the second light emitting device reaches the preset threshold, then there is no need to turn on the third light emitting device at this time, thereby ensuring the accuracy of optical detection and achieving the purpose of saving power.

[0093] In the above S213, if the signal strength of the electrical signal corresponding to a certain light emitter does not reach the preset threshold, it indicates that the electrical signal does not meet the detection requirements. At this time, the controller 6 can turn off the light emitter that is currently in the turned-on state, and turn on the remaining light emitters in turn until the signal strength of the electrical signal corresponding to one of the light emitters reaches the preset threshold. For example, assuming that three light emitters are arranged on the fixing belt 2, the three light emitters are turned on in turn at a predetermined interval. When the first light emitter is turned on, if the signal strength of the electrical signal corresponding to the first light emitter does not reach the preset threshold, the first light emitter is turned off while the second light emitter is turned on. If the signal strength of the electrical signal corresponding to the second light emitter still does not reach the preset threshold, the second light emitter is turned off while the third light emitter is turned on. Assuming that the signal strength of the electrical signal corresponding to the third light emitter reaches the preset threshold, the controller 6 keeps the third light emitter turned on at this time, and transmits the electrical signal corresponding to the third light emitter to the microprocessor 5 for processing, thereby ensuring the accuracy of optical detection and achieving the purpose of power saving.

[0094] Reference Figure 2 , Figure 3 and Figure 6 In another optional embodiment, when the light emitting assembly 3 includes at least one first light emitter with a variable light emitting angle, after the step of receiving one or more light signals transmitted through human skin by the light receiver 4 and converting the light signals into electrical signals, the method further includes:

[0095] S221, receiving an electrical signal output by the light receiver 4 through the controller 6, and determining whether the signal strength of the electrical signal reaches a preset threshold, wherein the electrical signal corresponds to the first light emitter light receiver 4 that is turned on earliest;

[0096] If the signal strength of the electrical signal does not reach the preset threshold, S222 is executed to control the light-emitting angle of the first light emitter through the controller 6 until the signal strength of the electrical signal reaches the preset threshold.

[0097] If the signal strength of the electrical signal reaches the preset threshold, S223 is executed to transmit the electrical signal to the microprocessor 5 .

[0098] In the present embodiment, specifically, it is assumed that three first light emitters are provided on the fixing belt 2, and the three first light emitters are turned on in sequence at a predetermined interval. When the first first light emitter (i.e., the first light emitter turned on earliest) is turned on, if the signal strength of the electrical signal corresponding to the first first light emitter reaches a preset threshold at the initial time, the electrical signal can be directly transmitted to the microprocessor 5 for processing without turning on the remaining first light emitters. If the signal strength of the electrical signal corresponding to the first first light emitter does not reach the preset threshold at the initial time, the light-emitting angle of the first light emitter can be controlled by the controller 6 until the signal strength of the electrical signal corresponding to the first light emitter reaches the preset threshold, thereby also eliminating the need to turn on the remaining first light emitters. To achieve the purpose of saving power, when the light signal initially emitted by the first light emitter that is turned on earliest cannot reach the light receiver 4 or only partially reaches the light receiver 4 due to being blocked by the arm bone 12, it can be improved by changing the light emission angle of the first light emitter. Therefore, a first light emitter with a variable light emission angle can play the same role as a plurality of light emitters with fixed light emission angles, which is beneficial to reduce hardware investment and reduce the processing cost of the fixing belt 2. Here, those skilled in the art can understand that as long as the position of the light receiver 4 on the wearable device body 1 and the position of the first light emitter are arranged appropriately, only one first light emitter needs to be set, and the light emission angle can be changed to ensure that the generated light signal reaches the light receiver 4.

[0099] Reference Figure 2 , Figure 3 , Figure 4 and Figure 6 In another optional embodiment, when the light emitting assembly 3 includes at least one first light emitter and at least one second light emitter with a fixed light emitting angle, after the step of controlling the light emitting angle of the first light emitter by the controller 6 until the signal strength of the electrical signal reaches a preset threshold, the step further includes:

[0100] S224, determining, by the controller 6, whether the signal strength of the electrical signal within a preset time period reaches a preset threshold;

[0101] If the signal strength of the electrical signal does not reach the preset threshold within the preset time period, S225 is executed, and the first light emitter that was turned on earliest is turned off through the controller 6, and the second light emitter or the remaining first light emitters are turned on in turn until the signal strength of the electrical signal corresponding to one of the first light emitters or the second light emitters reaches the preset threshold.

[0102] In the present embodiment, specifically, it is assumed that a first light emitter and two second light emitters are provided on the fixing belt 2, and there is a gap between the first light emitter and the second light emitter and between the two second light emitters. It is assumed that the first light emitter and the second light emitter are turned on in sequence at a predetermined interval (assuming that the predetermined time is 1 second). When the first light emitter is turned on, if the signal strength of the electrical signal corresponding to the first light emitter reaches a preset threshold value at the beginning, the electrical signal can be directly transmitted to the microprocessor 5 for processing without turning on the remaining second light emitters. If the signal strength of the electrical signal corresponding to the first light emitter does not reach the preset threshold value at the beginning, the light-emitting angle of the first light emitter can be controlled by the controller 6 until the signal strength of the electrical signal corresponding to the first light emitter reaches the preset threshold value, thereby eliminating the need to turn on the remaining second light emitters, thereby achieving energy saving. For the purpose of electricity, if the first light emitter cannot make the signal strength of the corresponding electrical signal reach the preset threshold value by changing the light-emitting angle within the preset time period (such as within 1 second), the first light emitter can be turned off by the controller 6 at this time, and the other two second light emitters can be turned on in turn until the signal strength of the electrical signal corresponding to one of the second light emitters reaches the preset threshold value, so that the first light emitter and the second light emitter can "compensate" for each other with light, ensuring that the transmission-type optical detection will not be unavailable due to the unavailability of the light signal generated by the second light emitter. In addition, since the hardware cost of the first light emitter is generally higher than the hardware cost of the second light emitter, in this embodiment, the transmission-type optical detection is achieved by matching the first light emitter with the second light emitter, while taking into account the hardware investment cost and the processing cost of the fixing belt 2.

[0103] In an optional embodiment, the aforementioned method for detecting human physiological information further includes:

[0104] S101, receiving a start instruction input by a user through the controller 6, and executing a step of starting the light emitting component 3 in a predetermined manner according to the start instruction.

[0105] In this embodiment, after wearing the wearable device on the wrist, the user can select the physiological information to be measured by performing relevant touch operations on the wearable device. When the controller 6 receives the start instruction generated by the user through the touch operation, the controller 6 controls the light-emitting component 3 to start. In this way, the user can perform transmissive optical detection at any time according to actual use needs to obtain his own physiological information, thereby improving the flexibility of the use of the wearable device.

[0106] Reference Figure 2 and Figure 6 In another optional embodiment, the aforementioned method for detecting human physiological information further includes:

[0107] S111, obtaining the pressure value detected by the pressure sensor 7 through the controller 6, and determining whether the pressure value exceeds a preset pressure threshold;

[0108] If the pressure value exceeds the preset pressure threshold, the above step S1 is executed to start the light emitting component 3 in a predetermined manner.

[0109] In this embodiment, preferably, the pressure sensor 7 is arranged on the bottom of the wearable device body 1, which is conducive to detecting the pressure between the wearable device and the human skin. Specifically, when the pressure value detected by the pressure sensor 7 reaches a preset pressure threshold, it indicates that the wearable device is in a wearing state. At this time, the light-emitting component 3 can be started by the controller 6, and then a transmissive optical detection can be performed to obtain the physiological information of the human body, thereby avoiding the trouble of manual operation and improving the user experience.

[0110] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for detecting human physiological information, characterized in that: Applied to a wearable device, the wearable device comprises a wearable device body, a fixing belt detachably connected to the wearable device body, a light receiver, a microprocessor, a controller and a light emitting component, wherein the light emitting component is arranged on a surface of a side of the fixing belt in contact with human skin in a specified manner, and is used to generate one or more light signals; the light receiver is arranged at the bottom of the wearable device body, and is used to receive one or more light signals after being transmitted through the human skin, and output an electrical signal to the microprocessor; the controller is connected to the light emitting component, and is used to control the light emitting operation of the light emitting component; the method comprises: The controller starts the light-emitting component in a predetermined manner to illuminate human skin with one or more light signals emitted by the light-emitting component; Receiving one or more optical signals transmitted through the human skin through the optical receiver, and converting the optical signals into electrical signals; Processing the electrical signal by the microprocessor to obtain physiological information of the human body; The light-emitting assembly includes at least two light emitters with different fixed light-emitting angles, each of the light emitters is arranged in sequence along the length direction of the fixed belt and there is a specified interval between each of the light emitters, and the step of starting the light-emitting assembly in a predetermined manner by the controller includes: Turning on each of the light emitters in sequence at predetermined intervals by the controller; The optical receiver is connected to the controller, and after the step of receiving one or more optical signals transmitted through the human skin by the optical receiver and converting the optical signals into electrical signals, the method further includes: Receiving, by the controller, one of the electrical signals output by the optical receiver, and determining whether the signal strength of the current electrical signal reaches a preset threshold; If the signal strength of the current electrical signal reaches a preset threshold, the current electrical signal is transmitted to the microprocessor, and the remaining light emitters are stopped from turning on through the controller.

2. The method for detecting human physiological information according to claim 1, characterized in that: The optical receiver is connected to the controller, and after the step of receiving one or more optical signals transmitted through the human skin by the optical receiver and converting the optical signals into electrical signals, the method further includes: receiving, by the controller, a plurality of the electrical signals output by the optical receiver, and selecting the electrical signal with the highest signal strength from the plurality of the electrical signals; The electrical signal with the highest signal strength is transmitted to the microprocessor.

3. The method for detecting human physiological information according to claim 1, characterized in that: After the step of receiving, by the controller, one of the electrical signals output by the optical receiver and determining whether the signal strength of the current electrical signal reaches a preset threshold, the method further includes: If the signal strength of the current electrical signal does not reach the preset threshold, the controller turns off the light emitter that is currently on, and turns on the remaining light emitters in sequence until the signal strength of the electrical signal corresponding to one of the light emitters reaches the preset threshold.

4. The method for detecting human physiological information according to claim 1, characterized in that: The light emitting assembly includes at least one first light emitter with a variable light emitting angle, the light receiver is connected to the controller, and after the step of receiving one or more light signals transmitted through the human skin by the light receiver and converting the light signals into electrical signals, the step further includes: Receiving, by the controller, one of the electrical signals output by the optical receiver, and determining whether the signal strength of the electrical signal reaches a preset threshold, wherein the electrical signal corresponds to the first light emitter that is turned on earliest; If the signal strength of the electrical signal does not reach the preset threshold, the light emitting angle of the first light emitter is controlled by the controller until the signal strength of the electrical signal reaches the preset threshold.

5. The method for detecting human physiological information according to claim 4, characterized in that: The light-emitting assembly includes at least one of the first light emitters and at least one second light emitter with a fixed light-emitting angle, the first light emitter and the second light emitter are arranged in sequence along the length direction of the fixed belt, and there is a specified interval between the first light emitter and the second light emitter, and after the step of controlling the light-emitting angle of the first light emitter by the controller until the signal strength of the electrical signal reaches a preset threshold, it also includes: Determining by the controller whether the signal strength of the electrical signal reaches a preset threshold within a preset time period; If the signal strength of the electrical signal does not reach the preset threshold within the preset time period, the controller turns off the first light emitter that was turned on earliest, and turns on the second light emitter or the remaining first light emitters in turn until the signal strength of the electrical signal corresponding to one of the first light emitters or the second light emitters reaches the preset threshold.

6. The method for detecting human physiological information according to any one of claims 1 to 5, characterized in that: The physiological information includes one or more of heart rate, blood pressure, blood oxygen saturation, red blood cell mass and blood flow rate.

7. The method for detecting human physiological information according to any one of claims 1 to 5, characterized in that: The method further comprises: The controller receives a start-up instruction input by a user, and executes the step of starting the light-emitting component in a predetermined manner according to the start-up instruction.

8. The method for detecting human physiological information according to any one of claims 1 to 5, characterized in that: The wearable device further includes a pressure sensor, which is connected to the controller and is used to detect the pressure between the wearable device and the human skin; the method further includes: Acquiring the pressure value detected by the pressure sensor through the controller, and determining whether the pressure value exceeds a preset pressure threshold; If the pressure value exceeds the preset pressure threshold, the step of starting the light-emitting component in a predetermined manner is performed.

9. A wearable device, used to implement the method according to any one of claims 1 to 8, characterized in that: The invention comprises a wearable device body, a fixing belt detachably connected to the wearable device body, a light receiver, a microprocessor and a light emitting component, wherein: The light emitting component is arranged on the surface of the side of the fixing belt that contacts the human skin in a specified manner, and is used to generate one or more light signals; The optical receiver is arranged at the bottom of the wearable device body, and is used to receive one or more optical signals after being transmitted through the human skin, and output electrical signals to the microprocessor.

10. The wearable device according to claim 9, characterized in that: The light emitting assembly includes at least two light emitters with different fixed light emitting angles, and each of the light emitters is arranged in sequence along the length direction of the fixing belt and there is a specified interval between each of the light emitters.

11. The wearable device according to claim 10, characterized in that: The light emitting angle of the light emitter is within a range of 5° to 20°.

12. The wearable device according to claim 9, characterized in that: It also includes a controller, which is connected to the light-emitting component and is used to control the light-emitting operation of the light-emitting component.

13. The wearable device according to claim 12, characterized in that: The light emitting assembly includes at least one first light emitter with a variable light emitting angle.

14. The wearable device according to claim 13, characterized in that: The light-emitting assembly includes at least one of the first light emitters and at least one second light emitter with a fixed light-emitting angle. The first light emitter and the second light emitter are arranged in sequence along the length direction of the fixing belt, and there is a specified interval between the first light emitter and the second light emitter.

15. The wearable device according to claim 13, characterized in that: The first light emitter includes a light source and an angle adjuster, and the controller is connected to the light source and the angle adjuster respectively; the angle adjuster is arranged opposite to the light source and is used to adjust the light emitting angle of the light source.

16. The wearable device according to claim 15, characterized in that: The angle adjuster includes one of a liquid lens and a variable focal length micro lens.

17. The wearable device according to any one of claims 9 to 16, characterized in that: The fixing strap includes a first fixing strap and a second fixing strap, the wearable device body is detachably connected to one end of the first fixing strap and one end of the second fixing strap respectively, the light receiver is arranged near the connection between the wearable device body and the first fixing strap, and the light-emitting component is arranged on the surface of one side of the first fixing strap that contacts human skin.

18. The wearable device according to any one of claims 9 to 16, characterized in that: The wearable device is a smart watch or a smart bracelet, the wearable device body is a watch face, and the fixing belt is a watch strap.

19. The wearable device according to any one of claims 12 to 16, characterized in that: It also includes a pressure sensor, which is connected to the controller and is used to detect the pressure between the wearable device and the human skin.

20. The wearable device according to any one of claims 12 to 16, characterized in that: It also includes an operational amplifier, an analog-to-digital converter and a display. The optical receiver is connected to the operational amplifier through the controller, the operational amplifier is connected to the microprocessor through the analog-to-digital converter, and the display is connected to the microprocessor.

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