Disclosure of Invention
The application mainly aims to provide a wearable device and a method for detecting human physiological information thereof, and aims to solve the problem that transmission type optical detection is difficult to realize on the wearable device in the prior art.
The application provides a wearable device, which comprises a wearable device body, a fixing belt detachably connected with the wearable device body, a light receiver, a microprocessor and a light-emitting component, wherein,
The luminous component is arranged on the surface of one side of the fixing belt, which is contacted with the skin of the human body, in a specified mode and is used for generating one or more optical signals;
The light receiver is arranged at the bottom of the wearable equipment body and is used for receiving one or more light signals transmitted through the skin of a human body and outputting the electric signals to the microprocessor.
Further, the light emitting assembly includes at least two light emitters having different fixed light emitting angles, each of the light emitters being sequentially arranged along a length direction of the fixing belt with a designated interval therebetween.
Further, the light emitting angle of the light emitter comprises 5-20 degrees.
Further, the wearable device further comprises a controller, wherein the controller is connected with the light emitting assembly and used for controlling the light emitting operation of the light emitting assembly.
Further, the light emitting assembly includes at least one first light emitter having a variable light emitting angle.
Further, the light emitting assembly comprises 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 sequentially arranged along the length direction of the fixing belt, and a designated interval exists between the first light emitter and the second light emitter.
Further, the first illuminator comprises a light source and an angle adjuster, wherein the controller is respectively connected with the light source and the angle adjuster, and the angle adjuster is arranged opposite to the light source and is used for adjusting the luminous angle of the light source.
Further, the angle adjuster includes one of a liquid lens and a variable focal length microlens.
Further, the fixed band includes first fixed band and second fixed band, and the wearable equipment body can be dismantled with the one end of first fixed band and the one end of second fixed band respectively and be connected, and the optical receiver is close to the junction setting of wearable equipment body and first fixed band, and luminous component sets up on the one side surface of first fixed band and human skin contact.
Further, the wearable device is an intelligent watch or an intelligent bracelet, the wearable device body is a dial plate, and the fixing strap is a watchband.
Further, the wearable device further comprises a pressure sensor connected with the controller and used for detecting the pressure between the wearable device and the skin of the human body.
Further, the wearable device further comprises an operational amplifier, an analog-to-digital converter and a display, the optical receiver is connected with the operational amplifier through the controller, the operational amplifier is connected with the microprocessor through the analog-to-digital converter, and the display is connected with the microprocessor.
The application also provides a method for detecting physiological information of a human body, which is applied to the wearable device, and the wearable device comprises a wearable device body, a fixing belt detachably connected with the wearable device body, a light receiver, a microprocessor, a controller and a light emitting component, wherein the light emitting component is arranged on the surface of one side of the fixing belt, which is contacted with the skin of the human body, in a specified mode and is used for generating one or more light signals, the light receiver is arranged at the bottom of the wearable device body and is used for receiving the one or more light signals transmitted through the skin of the human body and outputting the electric signals to the microprocessor, the controller is connected with the light emitting component and is used for controlling the light emitting operation of the light emitting component, and the method comprises the following steps:
activating, by the controller, the light emitting assembly in a predetermined manner to illuminate the human skin with one or more light signals emitted by the light emitting assembly;
Receiving one or more optical signals transmitted through the skin of the human body by the optical receiver and converting the optical signals into electrical signals;
the electric signal is processed by the microprocessor to obtain the physiological information of the human body.
Further, the light emitting assembly includes at least two light emitters having different fixed light emitting angles, each of the light emitters being sequentially arranged along a length direction of the fixing belt with a designated interval therebetween, the step of starting the light emitting assembly in a predetermined manner by the controller, comprising:
Each light emitter is turned on sequentially at predetermined intervals by the controller.
Further, the light receiver is connected to the controller, and after the step of receiving one or more optical signals transmitted through the skin of the human body by the light receiver and converting the optical signals into electrical signals, the method further comprises:
Receiving a plurality of electric signals output by the light receiver through the controller, and selecting the electric signal with the highest signal intensity from the plurality of electric signals;
And transmitting the electric signal with the highest signal strength to the microprocessor.
Further, the light receiver is connected to the controller, and after the step of receiving one or more optical signals transmitted through the skin of the human body by the light receiver and converting the optical signals into electrical signals, the method further comprises:
receiving an electric signal output by the light receiver through the controller, and judging whether the signal intensity of the current electric signal reaches a preset threshold value or not;
If the signal strength of the current electric signal reaches the preset threshold value, the current electric signal is transmitted to the microprocessor, and the other light emitters are stopped being started through the controller.
Further, after the step of receiving, by the controller, an electrical signal output by the optical receiver and determining whether the signal strength of the current electrical signal reaches the preset threshold, the method further includes:
If the signal intensity of the current electric signal does not reach the preset threshold value, the current light emitters in the on state are turned off through the controller, and the rest light emitters are turned on in sequence until the signal intensity of the electric signal corresponding to one of the light emitters reaches the preset threshold value.
Further, the light emitting assembly includes at least one first light emitter having 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 skin of the human body by the light receiver and converting the light signals into electrical signals, the light emitting assembly further includes:
Receiving an electric signal output by the light receiver through the controller, and judging whether the signal intensity of the electric signal reaches a preset threshold value, wherein the electric signal corresponds to the first light emitter which is started earliest;
if the signal intensity of the electric signal does not reach the preset threshold value, the controller is used for controlling the light emitting angle of the first light emitter until the signal intensity of the electric signal reaches the preset threshold value.
Further, 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 sequentially arranged along the length direction of the fixing belt, a designated interval exists between the first light emitter and the second light emitter, the light emitting angle of the first light emitter is controlled by the controller until the signal intensity of the electric signal reaches a preset threshold value, and after the step of:
Judging whether the signal strength of the electric signal in a preset time period reaches a preset threshold value or not by a controller;
If the signal intensity of the electric signal in the preset time period does not reach the preset threshold value, the first illuminator which is started earliest is closed by the controller, and the second illuminator or the rest first illuminators are sequentially started until the signal intensity of the electric signal corresponding to one of the first illuminators or the second illuminator reaches the preset threshold value.
Further, the physiological information includes one or more of heart rate, blood pressure, blood oxygen saturation, red blood cell quantity, and blood flow rate.
Further, the method for detecting physiological information of a human body further includes:
and receiving a starting instruction input by a user through the controller, and executing the step of starting the light emitting component according to a preset mode according to the starting instruction.
Further, the wearable device further comprises a pressure sensor connected with the controller and used for detecting the pressure between the wearable device and the skin of the human body, and the method for detecting the physiological information of the human body further comprises the following steps:
The method comprises the steps that a controller obtains a pressure value detected by a pressure sensor and judges whether the pressure value exceeds a preset pressure threshold value;
And if the pressure value exceeds the preset pressure threshold value, executing the step of starting the light emitting assembly according to a preset mode.
The wearable device has the beneficial effects that the light emitting assembly capable of emitting one or more light signals is arranged on the fixed belt, and the light receiver is arranged on the bottom of the wearable device body, so that the position arrangement of the light emitting assembly and the light receiver can be adapted to different users, the light signals emitted by the light emitting assembly can reach the light receiver through hand muscles, and further, the light signals can be optically detected according to the received light signals, and the transmission type optical detection is realized on the wearable device.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Referring to fig. 1, an embodiment of the present application proposes a wearable device, which includes a wearable device body 1, a fixing band 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 disposed on a surface of one side of the fixing band 2, which contacts with human skin, in a designated manner, for generating one or more optical signals, and the light receiver 4 is disposed at a bottom of the wearable device body 1, for receiving the one or more optical signals transmitted through the human skin, and outputting an electrical signal to the microprocessor 5.
In this embodiment, the wearable device is a smart watch or a smart bracelet, the wearable device body is a dial, the fixing band is a watchband, 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 the light signal is determined according to practical use requirements, for example, for detecting heart rate, the green light signal is needed, and for detecting blood oxygen saturation, the red light signal and the infrared light signal are needed, so in general, in order to meet different use requirements, more physiological information is obtained, the light emitting component 3 can integrate light emitting diodes of multiple color types, such as green light LEDs, red light LEDs, infrared light LEDs, and the like, the light receiving component 4 is an electronic device capable of converting the light signal into an electrical signal, such as a photodiode, a phototransistor, and the like, the specific position of the light emitting component 3 on the fixing band 2 and the specific position of the light receiving component 4 on the bottom of the wearable device body 1 are not particularly limited, as long as at least one light signal generated by the light emitting component 3 can reach the light receiving component 4, and the following wearable device can be specifically carried out according to the following working principle:
After the light emitting component 3 is started, the light emitting component 3 generates one or more light signals, the light signals are scattered to the light receiver 4 after being transmitted through the skin of a human body, wherein, as the wrist size of each user is different and the wearing tightness is also different, the intensity and the quantity of the light signals received by the light receiver 4 are also different, for example, some light signals can not reach the light receiver 4 or only partially reach the light receiver 4 due to the blocking of the arm bones 12, when the light receiver 4 receives the light signals from the light emitting component 3, the light receiver 4 converts the light signals into electric signals and transmits the electric signals to the microprocessor 5 for processing, thereby realizing the transmission type optical detection, obtaining the physiological information such as heart rate, blood pressure, blood oxygen saturation, red blood cell quantity, blood flow rate and the like, and for the microprocessor 5, the data processing process of the human body can be realized by using the conventional programs of the mature products on the market at present, and the data processing process can be realized without depending on new programs, for example, when the microprocessor 5 receives a plurality of electric signals, the electric signals can be converted into the electric signals, and the electric signals can be extracted from the plurality of the most high signals, and the highest signal to noise ratio can be selected and the physiological information can be extracted from the human body; in particular implementations, the microprocessor 5 may be of the STM32 series, MTK series, or the like.
In this embodiment, the wearable device lays out the light emitting component 3 capable of emitting one or more light signals on the fixing belt 2, and lays out the 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, the light signals emitted by the light emitting component 3 can reach the light receiver 4 through the hand muscle 11, and further optical detection can be performed according to the received light signals, and transmission type optical detection is realized on the wearable device.
Referring to fig. 2 to 4, in an alternative embodiment, the light emitting assembly 3 includes at least two light emitters having different fixed light emitting angles, each of the light emitters being sequentially arranged along the length direction of the fixing belt 2 with a designated interval therebetween.
In this embodiment, a general light emitting diode may be used as the light emitter, where the light emitting angle of the light emitter includes 5 ° to 20 °, for example, the light emitting angle of some light emitters may be 5 °, the light emitting angle of some light emitters may be 10 °, the light emitting angle of some light emitters may be 15 °, and so on, and since the fixing band 2 is in a curved state when the wearable device is worn, in order to adapt to the wearing conditions of wrists with different sizes and different tightness degrees, it is ensured that light signals may scatter to the light receiver 4, and therefore, light emitters with different light emitting angles may be sequentially arranged along the length direction of the fixing band 2, and when the size of the wrists changes or the tightness of the wearing changes, so that some light signals that may be received by the light receiver 4 may not reach 4, the light signals generated by other light emitters may also be used as "compensation", so that the optical detection of the transmission type may not be unrealized because the light signals generated by some light emitters may not be available, and in addition, a specified interval exists between the light emitters may be avoided, so that interference and reliability of detection between the light signals may occur greatly.
Referring to fig. 2, in a preferred embodiment, the wearable device further includes a controller 6, where the controller 6 is connected to the light emitting component 3 and is used to control the light emitting operation of the light emitting component 3, where the controller 6and the light emitting component 3 may be connected in a wired or wireless manner (such as bluetooth) to implement communication connection, so that by adding the controller 6, intelligent control over the light emitting operation of the light emitting component 3 may be implemented, for example, after the wearable device is worn on a wrist, a user may select physiological information to be measured by performing a relevant touch operation on the wearable device, and when the controller 6 receives a relevant instruction generated by the user through the touch operation, the controller 6 controls the light emitting component 3 to be started, so that the user may perform transmission optical detection by starting the light emitting component 3 at any time according to actual use needs, thereby improving flexibility of use of the wearable device, where the controller 6 may use a microcontroller with a model number of STM32L series (such as STM32L 496I 6 or the like) or may use a microcontroller with other model numbers as long as the controller 6 may not meet specific requirements.
Referring to fig. 2 to 4, in another alternative embodiment, the light emitting assembly 3 includes at least one first light emitter with a variable light emitting angle, the light receiver 4 is connected to the microprocessor 5 through the controller 6, and the controller 6 is specifically configured 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 requirement of detection (such as the strength of the electrical signals is too weak or the signal to noise ratio of the electrical signals is too low), so that when the light signal originally emitted by the first light emitter cannot reach the light receiver 4 due to the obstruction of the arm bone 12 or only partially reach the light receiver 4, the light emitting angle of the first light emitter can be changed, so that one first light emitter with a variable light emitting angle can perform the same function as a plurality of light emitters with a fixed light emitting angle, thereby being beneficial to reduce the investment of hardware and reduce the processing cost of the fixing band 2, where 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 sufficiently laid out, the first light emitter can also be set in a manner that the light emitting angle can be ensured by only changing the light emitting angle.
Referring to fig. 2 to 4, in another alternative embodiment, the light emitting assembly 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 being sequentially arranged along the length direction of the fixing belt 2 with a designated interval therebetween.
In this embodiment, a general light emitting diode may be used as the second light emitter, where the light emitting angle of the second light emitter includes 5 ° to 20 °, and when the wearable device is worn, the fixing strap 2 is in a curved state, so that in order to adapt to the wearing conditions of wrists with different sizes and different degrees of tightness, it is ensured that the light signals can be scattered to the light receiver 4, so that the first light emitter and the second light emitter can be sequentially arranged along the length direction of the fixing strap 2, and when the size of the wrists changes or the wearing tightness changes, so that the light signals generated by the first light emitter or the second light emitter cannot reach the light receiver 4, the first light emitter and the second light emitter can mutually perform "compensation" of light, so that the optical detection of transmission type cannot be achieved because the light signals generated by the first light emitter or the second light emitter are not available, and the specific interval exists between the first light emitter and the second light emitter, so that the accuracy and the reliability of the detection can be prevented from being affected due to the larger interference between the light signals, and the other hardware implementation cost of the first light emitter and the second light emitter is higher than that the hardware implementation cost of the first light emitter and the second light emitter is matched with the hardware.
In an alternative embodiment, the first light emitter includes a light source (not shown) and an angle adjuster (not shown) connected to the light source and the angle adjuster, respectively, the angle adjuster being disposed opposite to the light source for adjusting a light emitting angle of the light source, wherein the angle adjuster includes one of a liquid lens using an electrowetting cell and a variable focal length microlens of a liquid crystal, and detailed description thereof is omitted since structures of the liquid lens and the variable focal length microlens are well known.
In this embodiment, specifically, when one or more electrical signals output by the optical receiver 4 do not meet the requirement of detection (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 emission angle of the light source by controlling the angle adjuster, so that the light emission angle of the first light emitter is variable.
Referring to fig. 1 and 5, in an alternative 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 disposed near a junction of the wearable device body 1 and the first fixing strap 212, and the light emitting assembly 3 is disposed on a surface of the first fixing strap 212 contacting with human skin.
In this embodiment, since the wrist size of each user is different and the wearing tightness is 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 cannot penetrate, so the light receiver 4 may be disposed near the connection between the wearable device body 1 and the first fixing strap 212, and the light emitting component 3 is disposed on the surface of the first fixing strap 212 contacting with the skin of the human body, so that one or more light signals generated by the light emitting component 3 may avoid the arm bone 12 to reach the light receiver 4 to the greatest extent, thereby being beneficial to reducing the number of light emitters on the light emitting component 3 and saving the input cost of hardware.
Referring to fig. 2, in an alternative embodiment, the aforementioned wearable device further comprises a pressure sensor 7, the pressure sensor 7 being connected to the controller 6 for detecting the pressure between the wearable device and the skin of the human body.
In this embodiment, preferably, the pressure sensor 7 is disposed on the bottom of the wearable device body 1, so that it is beneficial to detect the pressure between the wearable device and the skin of the human body, specifically, when the pressure value detected by the pressure sensor 7 reaches the preset pressure threshold, it indicates that the wearable device is in a wearing state, at this time, the light emitting component 3 is controlled by the controller 6 to be started, and then the transmissive optical detection is performed, so as to obtain the physiological information of the human body, thereby avoiding the trouble of manual operation and improving the user experience.
Referring to fig. 2, in an alternative embodiment, the wearable device further includes an operational amplifier 8, an analog-to-digital converter 9, and a display 10, where 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, where the analog-to-digital converter 9 of the operational amplifier 8 and the display 10 the analog-to-digital converter 9 of the optical receiver 4 and the analog-to-digital converter 9 of the optical receiver 8 display 10 the analog-to-digital converter 9 of the microprocessor 5.
In this embodiment, specifically, the optical connector converts the optical signal from the optical component 3 into an electrical signal and transmits the electrical signal to the controller 6, the controller 6 transmits the electrical signal meeting the detection requirement to the operational amplifier 8 for amplification, the analog-to-digital converter 9 converts the amplified electrical signal into a digital signal, and the microprocessor 5 processes the digital signal and transmits the digital signal to the display 10 for display, so that the user can obtain the physiological information of the user.
Referring to fig. 2 and 6, an embodiment of the present application further proposes a method for detecting physiological information of a human body, which is applied to the wearable device, and the method includes:
s1, starting the light emitting assembly 3 through the controller 6 according to a preset mode to irradiate human skin by one or more light signals emitted by the light emitting assembly 3;
s2, receiving one or more optical signals transmitted through the skin of the human body through the optical receiver 4 and converting the optical signals into electrical signals;
s3, processing the electric signals through the microprocessor 5 to obtain physiological information of the human body.
In S1, in use, the controller 6 may activate the light emitting assembly 3, thereby controlling the light emitting assembly 3 to emit one or more light signals in a predetermined manner.
In the above S2, specifically, after the light emitting assembly 3 is started by the controller 6, one or more optical signals transmitted through the skin of the human body may be received by the optical receiver 4, where, because the wrist size of each user is different and the wearing tightness is different, the intensity and the number of the optical signals received by the optical receiver 4 are also different, for example, some optical signals cannot reach the optical receiver 4 or only partially reach the optical receiver 4 due to the obstruction of the arm bone 12, and when the optical receiver 4 receives the optical signals from the light emitting assembly 3, the optical receiver 4 converts the optical signals into electrical signals and transmits the electrical signals to the microprocessor 5.
In the step S3, the physiological information includes one or more of heart rate, blood pressure, blood oxygen saturation, red blood cell amount and blood flow rate, wherein the process of obtaining the physiological information of the human body by processing the electrical signal by the microprocessor 5 is well known in the art and will not be described herein.
In this embodiment, the method for detecting physiological information of a human body controls the light emitting component 3 arranged on the fixing belt 2 through the controller 6 to generate one or more light signals to irradiate the skin of the human body, further receives the one or more light signals transmitted through the skin of the human body through the light receiver 4 arranged on the bottom of the wearable device body 1, converts the light signals into electrical signals, and then processes the electrical signals through the microprocessor 5 to obtain physiological information of the human body, so that the detection of the physiological information of the human body by the wearable device is realized in a transmission mode.
In an alternative embodiment, when the lighting assembly 3 comprises at least two light emitters having different fixed lighting angles, the step of activating the lighting assembly 3 by the controller 6 in a predetermined manner comprises:
S11, sequentially turning on the respective light emitters at predetermined intervals by the controller 6.
In this embodiment, the predetermined time may be 0.5 seconds, 1 second, 1.5 seconds, etc., which is not limited in particular, and the light emitters are turned on sequentially by means of spacing the predetermined time, so that the time when each light signal arrives at the light receiver 4 is different, and thus the accuracy of optical detection is prevented from being affected by mutual interference between the light signals, which is beneficial to improving the accuracy of human physiological information detection.
Referring to fig. 2 and 6, in an alternative embodiment, when the light emitting assembly 3 includes at least two light emitters having different fixed light emitting angles, the step of receiving one or more light signals transmitted through the skin of the human body by the light receiver 4 and converting the light signals into electrical signals further includes:
s201, receiving a plurality of electric signals output by the optical receiver 4 through the controller 6, and selecting the electric signal optical receiver 4 with the highest signal intensity from the plurality of electric signals;
s202, transmitting the electric signal with the highest signal intensity to the microprocessor 5.
In this embodiment, because the light emitters are relatively close to each other, the signal noise factor is negligible, and therefore, the electrical signal with the highest signal intensity is selected from the plurality of electrical signals, so that the accuracy of optical detection is not affected, and the process of calculating the signal-to-noise ratio in the prior art can be omitted, thereby being beneficial to improving the efficiency of optical detection of the light receiver 4.
Referring to fig. 2, 3, 4 and 6, in another alternative embodiment, when the light emitting assembly 3 includes at least two light emitters having different fixed light emitting angles, the step of receiving one or more light signals transmitted through the skin of the human body by the light receiver 4 and converting the light signals into electrical signals further includes:
s211, receiving an electric signal output by the optical receiver 4 through the controller 6, and judging whether the signal intensity of the current electric signal reaches a preset threshold value of the optical receiver 4;
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 rest of the light emitter controllers 6.
If the signal intensity of the current electrical signal does not reach the preset threshold, S213 is executed, where the current light emitter in the on state is turned off by the controller 6, and the rest light emitters are turned on sequentially until the signal intensity of the electrical signal corresponding to one of the light emitters reaches the preset threshold.
In the above S211, specifically, the controller 6 of the light receiver 4 controls each light emitter to be turned on sequentially at predetermined intervals, when the controller 6 receives an electrical signal corresponding to a certain light emitter (that is, an optical signal sent 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 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 requirement of detection, and the electrical signal can be transmitted to the microprocessor 5 for processing.
In the above S212, when the signal intensity of the electrical signal corresponding to one light emitter reaches the preset threshold, the electrical signal can be directly transmitted to the microprocessor 5 for processing, and the other light emitters are not required to be turned on, for example, if three light emitters are provided on the fixing belt 2, when the second light emitter is turned on, the signal intensity of the electrical signal corresponding to the second light emitter reaches the preset threshold, the third light emitter is not required to be turned on at this time, so that the accuracy of optical detection can be ensured, and the purpose of saving electricity can be achieved.
In S213, if the signal intensity of the electrical signal corresponding to one of the light emitters does not reach the preset threshold, the controller 6 may turn off the light emitters currently in the on state, and sequentially turn on the remaining light emitters until the signal intensity of the electrical signal corresponding to one of the light emitters reaches the preset threshold, for example, if three light emitters are provided on the fixing belt 2, the three light emitters are sequentially turned on at predetermined intervals, when the signal intensity 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, and if the signal intensity 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, and if the signal intensity of the electrical signal corresponding to the third light emitter reaches the preset threshold, the controller 6 keeps the third light emitter on, and transmits the electrical signal corresponding to the third light emitter to the microprocessor 5 for processing, thereby ensuring the optical detection accuracy and saving electricity.
Referring to fig. 2,3 and 6, in another alternative embodiment, when the light emitting assembly 3 includes at least one first light emitter having a variable light emitting angle, the step of receiving one or more light signals transmitted through the skin of the human body by the light receiver 4 and converting the light signals into electrical signals further includes:
s221, receiving an electric signal output by the light receiver 4 through the controller 6, and judging whether the signal intensity of the electric signal reaches a preset threshold value, wherein the electric signal corresponds to the first light receiver 4 of the earliest opening;
if the signal strength of the electrical signal does not reach the preset threshold, S222 is executed, and the controller 6 controls the light emitting angle of the first light emitter until the signal strength of the electrical signal reaches the preset threshold.
If the signal strength of the electrical signal reaches the preset threshold, S223 is performed to transmit the electrical signal to the microprocessor 5.
In this embodiment, specifically, it is assumed that three first light emitters are provided on the fixing belt 2, and the three first light emitters are sequentially turned on at intervals of a predetermined time, when the first light emitter (i.e., the first light emitter turned on earliest) is turned on, if the signal intensity of the electric signal corresponding to the first light emitter initially reaches a preset threshold value, the electric signal can be directly transmitted to the microprocessor 5 for processing without turning on the rest of the first light emitters, and if the signal intensity of the electric signal corresponding to the first light emitter initially does not reach the preset threshold value, the controller 6 can control the light emitting angle of the first light emitter until the signal intensity of the electric signal corresponding to the first light emitter reaches the preset threshold value, so that the rest of the first light emitter can be not turned on again, thereby achieving the purpose of saving electricity.
Referring to fig. 2, 3, 4 and 6, in another alternative embodiment, when the light emitting assembly 3 includes at least one first light emitter and at least one second light emitter having a fixed light emitting angle, the step of controlling the light emitting angle of the first light emitter by the controller 6 until the signal intensity of the electrical signal reaches a preset threshold value further includes:
S224, judging whether the signal strength of the electric signal in the preset time period reaches a preset threshold value or not through the controller 6;
If the signal strength of the electrical signal does not reach the preset threshold value within the preset time period, S225 is executed, the earliest first light emitter is turned off by the controller 6, and the second light emitter or the rest of the first light emitters are turned on in sequence until the signal strength of the electrical signal corresponding to one of the first light emitters or the second light emitter reaches the preset threshold value.
In this embodiment, specifically, it is assumed that a first light emitter and two second light emitters are disposed on the fixing belt 2, there is an interval between the first light emitter and the second light emitter, and the first light emitter and the second light emitter are sequentially turned on under the assumption that there is a predetermined interval (1 second for a predetermined time), when the first light emitter is turned on, if the signal intensity of the electric signal corresponding to the first light emitter reaches a preset threshold value in the initial period, the electric signal can be directly transmitted to the microprocessor 5 for processing without turning on the rest of the second light emitters, and if the signal intensity of the electric signal corresponding to the first light emitter does not reach the preset threshold value in the initial period, the controller 6 can control the light emitting angle of the first light emitter until the signal intensity of the electric signal corresponding to the first light emitter reaches the preset threshold value, so that the rest of the second light emitter is not turned on, and the second light emitter can not be turned off until the signal intensity of the first light emitter reaches the preset threshold value in the initial period (1 second) is not reached, and the first light emitter can not reach the preset threshold value by the first light emitter, so that the first light emitter can not be turned on by the first light emitter, and the second light emitter can not reach the preset threshold value, and the first light emitter can not be sequentially turned off due to the first light emitter, and the second light emitter can not reach the first light emitter, and the first light emitter can not reach the threshold value, and the first light emitter can be sequentially turned on due to the hardware, the first light emitter and the second light emitter are matched to realize transmission type optical detection, and meanwhile, the input cost of hardware and the processing cost of the fixing belt 2 are considered.
In an alternative embodiment, the method for detecting physiological information of a human body further includes:
S101, receiving a start instruction input by a user through the controller 6, and executing a step of starting the light emitting assembly 3 in a predetermined manner according to the start instruction.
In this embodiment, after the wearable device is worn on the wrist, the user can select the physiological information to be measured by performing related touch operation on the wearable device, and when the controller 6 receives a start instruction generated by the user through the touch operation, the controller 6 controls the light emitting component 3 to start, so that the user can perform transmission type optical detection by starting the light emitting component 3 at any time according to actual use requirements to obtain own physiological information, thereby improving the use flexibility of the wearable device.
Referring to fig. 2 and 6, in another alternative embodiment, the method for detecting physiological information of a human body further includes:
S111, acquiring a pressure value detected by the pressure sensor 7 through the controller 6, and judging whether the pressure value exceeds a preset pressure threshold value;
If the pressure value exceeds the preset pressure threshold, the above step S1 is performed to activate the light emitting assembly 3 in a predetermined manner.
In this embodiment, preferably, the pressure sensor 7 is disposed on the bottom of the wearable device body 1, so that it is beneficial to detect the pressure between the wearable device and the skin of the human body, specifically, when the pressure value detected by the pressure sensor 7 reaches the preset pressure threshold, it indicates that the wearable device is in a wearing state, at this time, the light emitting component 3 is controlled by the controller 6 to be started, and then the transmissive optical detection is performed, so as to obtain the physiological information of the human body, thereby avoiding the trouble of manual operation and improving the user experience.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the application.