Biometric information measurement apparatus and electronic device

Abstract

A biometric information measurement apparatus, comprising a finger sleeve, a pulse wave sensor, an analog front end, and a microcontroller unit. The finger sleeve comprises a mechanical structure or an air bag. The pulse wave sensor comprises a light emitter and a photodiode. The analog front end is electrically connected to the pulse wave sensor, and the analog front end is used for receiving an electrical signal and outputting an analog front end signal. The microcontroller unit is electrically connected to the analog front end, and the microcontroller unit is used for receiving the analog front end signal and outputting biometric information, said biometric information comprising a blood pressure value. The described biometric information measurement apparatus realizes the miniaturization of blood pressure measurement apparatuses, is convenient for users to carry around, and enables users to monitor blood pressure in a non-home environment.

Description

Biometric information detection device and electronic device Technical Field

[0001] The present application relates to the technical field of wearable devices, and more specifically, to a biometric information detection device and an electronic device. Background Art

[0002] Currently, the mercury sphygmomanometer is the gold standard for blood pressure measurement. It requires professional knowledge and can be dynamically adjusted based on the individual's specific needs, resulting in accurate test results and a wide range of applicability. While electronic sphygmomanometers currently on the market do not require professional operation, their large size generally means they are typically kept at home and cannot be carried around, making them inadequate for real-time blood pressure management for individuals with hypertension.

[0003] Therefore, how to miniaturize the blood pressure measuring device so that users can carry it with them and monitor their blood pressure in non-home environments is a technical problem that needs to be solved urgently.

[0004] Summary of the Invention

[0005] A first aspect of an embodiment of the present application provides a biometric information detection device, comprising:

[0006] A finger cot, the finger cot comprising a mechanical structure or an air bag, the mechanical structure or the air bag being used to secure the finger cot to the user's finger;

[0007] A pulse wave sensor comprising a light emitter and a photodiode, wherein the light emitter is configured to emit a light signal, the light signal being reflected or transmitted by the object to be detected and then reaching the photodiode, and the photodiode is configured to convert the received light signal into an electrical signal;

[0008] an analog front end, the analog front end being electrically connected to the pulse wave sensor and configured to receive the electrical signal and output an analog front end signal;

[0009] A microcontrol unit is electrically connected to the analog front end, and is used to receive the analog front end signal and output biometric information, wherein the biometric information includes a blood pressure value.

[0010] In a possible implementation, the device further includes a pressure detector electrically connected to the analog front end.

[0011] In a possible implementation manner, the finger sleeve is of a through-type with both ends, and the cross-section of the through-type finger sleeve is annular.

[0012] In one possible embodiment, the finger sleeve is of a non-through type;

[0013] The non-through finger cot is provided with an opening only at one end;

[0014] The cross section of the non-through type finger sleeve is one of a rectangle, a circle, an ellipse and a polygon, and the non-through type finger sleeve has an inner space for accommodating the user's finger.

[0015] In a possible implementation manner, the finger cuff further includes an air conduit connected to the air bag.

[0016] In a possible implementation, the mechanical structure includes a spring structure, and the spring structure includes a spring body and a connecting plate;

[0017] The connecting plate is connected to one end of the spring body, the other end of the spring body is connected to the finger sleeve, and the spring structure is arranged on one side of the finger sleeve close to the opening.

[0018] In a possible implementation, the spring body includes a first spring body and a second spring body, and the connecting plate includes a first connecting plate and a second connecting plate;

[0019] The first connecting plate is connected to the first spring body, the second connecting plate is connected to the second spring body, the light emitter is provided on the first connecting plate, and the photodiode is provided on the second connecting plate.

[0020] In a possible implementation, the mechanical structure or the airbag is disposed inside the finger sleeve on a side close to the opening.

[0021] In a possible embodiment, the mechanical structure includes a motor structure, which includes a motor and a connecting plate. The connecting plate is connected to the motor, and the motor is used to control the movement of the connecting plate. The motor structure is arranged on a side of the finger sleeve close to the opening.

[0022] In a possible implementation, the biometric information further includes at least one of a heart rate value and a blood oxygen value.

[0023] An electronic device provided in the second aspect of an embodiment of the present application includes any one of the biometric information detection devices provided in the first aspect of the embodiment of the present application, and a display screen, wherein the display screen is arranged on the outer surface of the device, and the display screen is used to display the biometric information.

[0024] In one possible implementation, the electronic device includes a smart ring, a finger-clip blood pressure meter, a finger-clip blood pressure oximeter, and a finger-clip multi-parameter meter.

[0025] The embodiments of the present application provide a biometric information detection device that can measure blood pressure based on a finger and accurately measure blood pressure with a smaller volume, thereby miniaturizing the blood pressure measurement device and making it convenient for users to carry around.

[0026] The embodiments of the present application also provide an electronic device that can facilitate hypertensive users to quickly and conveniently monitor real-time blood pressure in non-home environments, thereby improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of a finger blood vessel going from dilation to pressurization and then back to dilation.

[0028] FIG2 is a schematic structural diagram of a biometric information detection device provided in an embodiment of the present application.

[0029] FIG3 is a schematic structural diagram of another biometric information detection device provided in an embodiment of the present application.

[0030] FIG4 is a schematic structural diagram of another biometric information detection device provided in an embodiment of the present application.

[0031] FIG5 is a graph showing the amplitude of a PPG waveform during the process of a blood vessel recovering from complete contraction to relaxation.

[0032] FIG6 is a schematic diagram of calculating blood pressure using a double Gaussian fitting method.

[0033] FIG7 is a schematic diagram of blood pressure detection results at the third joint of a finger by a biometric information detection device provided in an embodiment of the present application.

[0034] FIG8 is a schematic diagram of blood pressure detection results at the second joint of a finger by a biometric information detection device provided in an embodiment of the present application.

[0035] FIG9 is a structural block diagram of an electronic device provided in an embodiment of the present application.

[0036] FIG10 is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings.

[0038] The terms used in this application are for the purpose of describing particular embodiments only and are not intended to limit this application. The singular forms "a," "an," "the," and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise.

[0039] In addition, terms such as "first" and "second" are used only to distinguish similar objects and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0040] FIG1 shows a schematic diagram of a finger blood vessel going from dilation to pressurization and then back to dilation.

[0041] As shown in Figure 1(a), a finger 10 includes bones 101 and blood vessels 102. When the finger 10 is in a normal resting state, the blood vessels 102 are in a dilated state. When pressure is applied to the finger 10, the blood vessels 102 on both sides of the finger 10 gradually shift from a dilated state to a compressed state, as shown in Figure 1(b). At this point, blood flow in the blood vessels 102 decreases to a nearly cutoff state. Subsequently, when the pressure applied to the finger 10 is gradually released, as shown in Figure 1(c), the blood vessels 102 gradually return from the compressed state to a dilated state.

[0042] During the process of pressurizing the blood vessel 102 or restoring the blood vessel 102 , the pressure value at that time and the pressure pulse wave or photoelectric pulse wave of the blood vessel 102 are synchronously recorded.

[0043] The waveforms of pressure pulse waves and photoelectric pulse waves have similar morphological characteristics. This is because they are actually two different manifestations of the same periodic arterial pulsation process, and both essentially reflect the functional state of the cardiovascular system. Therefore, by analyzing and studying the characteristics of pressure pulse waves or photoelectric pulse wave signals, the physiological and pathological information contained therein can be extracted, providing assistance for the early diagnosis and prevention of cardiovascular diseases.

[0044] Pressure pulse waves are typically detected and acquired in superficial arteries such as the radial, carotid, or femoral arteries. A pressure detector is used to record the changes in arterial pressure over time, creating a pressure pulse waveform. Photoelectric pulse waves are typically detected and acquired using a photoelectric sensor, often referred to as photoplethysmography (PPG). The resulting curve of blood volume changes over time is called a photoelectric pulse waveform, and will be referred to as a PPG waveform below.

[0045] Based on the waveform of the pressure pulse wave or photoelectric pulse wave during the pressurization or recovery process, relevant features, such as the PPG waveform peak, are extracted and plotted into an envelope curve. According to the principle of oscillometric method, the point with the maximum amplitude is the mean blood pressure (MBP). Then, the systolic blood pressure (SBP) and diastolic blood pressure (DBP) can be obtained through traditional double Gaussian fitting method, envelope inflection point method or deep learning algorithm.

[0046] Specifically, Figure 2 shows a structural schematic diagram of a biometric information detection device provided in an embodiment of the present application, Figure 3 shows a structural schematic diagram of another biometric information detection device provided in an embodiment of the present application, and Figure 4 shows a structural schematic diagram of yet another biometric information detection device provided in an embodiment of the present application.

[0047] As shown in FIG2 , FIG3 and FIG4 , an embodiment of the present application provides a biometric information detection device 20 , the device 20 comprising:

[0048] The finger sleeve 200 includes a mechanical structure 24 or an air bag 25 . The mechanical structure 24 or the air bag 25 is used to fix the finger sleeve 200 on the user's finger 10 .

[0049] Optionally, as shown in FIG4 , the finger cuff 200 is a through-type finger cuff 202. The cross-section of the through-type finger cuff 202 is annular, including circular, triangular, square, elliptical, and wavy shapes. The finger cuff 202 in FIG4 resembles a ring. The user can wear the through-type finger cuff 202 on the third knuckle (as shown in FIG4( a )) or the second knuckle (as shown in FIG4( b )) of the finger 10 to conveniently and quickly perform blood pressure testing.

[0050] Optionally, referring to Figures 2 and 3 , the finger cuff 200 is of a non-through type. That is, the non-through type finger cuff 201 has an opening only at one end. The cross-section of the non-through type finger cuff 201 is one of rectangular, circular, elliptical, and polygonal. The non-through type finger cuff 201 has an internal space for accommodating the user's finger 10. In daily use, the non-through type finger cuff 201 is less affected by ambient light, enabling highly accurate blood pressure measurement while also meeting the requirements of convenience and speed.

[0051] In the embodiment of the present application, both the two-end through-type finger sleeve 202 and the non-through-type finger sleeve 201 may include the mechanical structure 24 or the airbag 25 .

[0052] Optionally, the mechanical structure 24 or the airbag 25 is disposed inside the finger sleeve 200 on a side close to the opening.

[0053] When the non-through finger cover 201 is worn on the user's finger 10, the opening of the non-through finger cover 201 is close to the third joint of the finger 10. The mechanical structure 24 or the airbag 25 is arranged inside the non-through finger cover 201 near the opening, so that the pressure pulse wave or photoelectric pulse wave waveform of the third joint can be collected.

[0054] As an optional embodiment, referring to FIG. 3 and FIG. 4 , the finger cot 200 includes the airbag 25 and an air conduit 270 . The air conduit 270 is connected to the airbag 25 , and the air conduit 270 can inflate and deflate the airbag 25 .

[0055] As another optional embodiment, the finger cot 200 includes a mechanical structure 24, which is used to secure the finger cot 200 to the user's finger 10. The mechanical structure 24 includes a spring structure 240, which includes a spring body 241 and a connecting plate 242. The connecting plate 242 is connected to one end of the spring body 241, and the other end of the spring body 241 is connected to the finger cot 200. The spring structure 240 is disposed inside the finger cot 200 on a side near the opening.

[0056] Specifically, as an optional embodiment, referring to FIG. 2 , the spring body 241 includes a first spring body 2411 and a second spring body 2412 , and the connecting plate 242 includes a first connecting plate 2421 and a second connecting plate 2422 ;

[0057] The first connecting plate 2421 is connected to the first spring body 2411 , and the second connecting plate 2422 is connected to the second spring body 2412 . The light emitter 211 is provided on the first connecting plate 2421 , and the photodiode 212 is provided on the second connecting plate 2422 .

[0058] As another optional embodiment, the mechanical structure 24 includes a motor structure, which includes a motor and a connecting plate. The connecting plate is connected to the motor, and the motor is used to control the movement of the connecting plate. The motor structure is disposed inside the finger cuff 200 on a side near the opening. The motor can control the connecting plate to pressurize and depressurize the blood vessel 102.

[0059] The pulse wave sensor 210 includes the light emitter 211 and the photodiode 212. The light emitter 211 is used to emit a light signal. The light signal is reflected or transmitted by the object to be detected and reaches the photodiode 212. The photodiode 212 is used to convert the received light signal into an electrical signal.

[0060] Specifically, referring to the pulse wave sensor 210 in FIG. 2 , in the transmission-type pulse wave sensor 210 , the light signal emitted by the light emitter 211 passes through the muscles, bones, veins, and other connecting tissues of the finger 10 and is received by the photodiode 212 .

[0061] Specifically, referring to the pulse wave sensor 210 in FIG. 4 , in the reflective pulse wave sensor 210 , the light signal emitted by the light emitter 211 passes through the skin tissue of the finger 10 and is then reflected to the photodiode 212 .

[0062] An analog front end (AFE) 220 is electrically connected to the pulse wave sensor 210 and is used to receive the electrical signal and output an analog front end signal.

[0063] Specifically, the analog front end 220 can amplify, filter, and perform analog-to-digital (AD) conversion on the electrical signal sensed by the pulse wave sensor 210 , and the processed signal is the analog front end signal.

[0064] A microcontroller unit (MCU) 230 is electrically connected to the analog front end 220 and is used to receive the analog front end signal and output biometric information, wherein the biometric information includes a blood pressure value.

[0065] Optionally, when performing blood pressure detection, the microcontroller unit MCU can process the analog front-end signal through the traditional double Gaussian fitting method or envelope inflection point method or deep learning algorithm, and then obtain the blood pressure values ​​including systolic pressure SBP and diastolic pressure DBP.

[0066] As an optional embodiment, the biometric information further includes at least one of a heart rate value and a blood oxygen value. The pulse wave sensor 210 can be used for both blood pressure detection and heart rate and blood oxygen detection, thereby multiplexing the pulse wave sensor 210, simplifying the structure of the device 20 and saving costs.

[0067] Optionally, referring to FIG. 3 and FIG. 4 , the device 20 further includes a pressure detector 260 , and the pressure detector 260 is electrically connected to the analog front end 220 .

[0068] As an optional embodiment, the pressure detector 260 can be used to measure the pressure pulse wave, and then calculate the blood pressure value based on the pressure pulse wave, while the pulse wave sensor 210 will be used to measure the heart rate value and blood oxygen value.

[0069] As another optional embodiment, the pressure detector 260 and the pulse wave sensor 210 can be combined to measure blood pressure. Two initial blood pressure values ​​can be calculated based on the pressure pulse wave measured by the pressure detector 260 and the photoelectric pulse wave measured by the pulse wave sensor 210, respectively. These two initial blood pressure values ​​can then be processed, for example, by taking an average, to obtain a target blood pressure value. In this embodiment, using both the pressure detector 260 and the pulse wave sensor 210 to calculate blood pressure can improve the accuracy of the blood pressure calculation results.

[0070] It is worth noting that, in addition to being used in the devices of FIG. 3 and FIG. 4 , the pressure detector 260 can also be used in the device 20 including FIG. 2 . The embodiment of the present application does not limit the application scope of the pressure detector 260 .

[0071] FIG5 is a graph showing the amplitude of a PPG waveform during the process of a blood vessel recovering from complete contraction to relaxation.

[0072] Specifically, referring to Figures 1 and 5 , using the oscillometric method for measuring blood pressure as an example, pressure is applied to finger 10 to occlude blood vessel 102, thereby obtaining a photoelectric pulse wave amplitude curve. Curve fitting is then used to capture the curve's characteristics in multiple dimensions. Based on the curve fitting parameters (Parameter 1, Parameter 2, Parameter 3, etc. in Figure 5 ), the final blood pressure results, namely the systolic pressure (SBP) and diastolic pressure (DBP) in Figure 5 , are obtained. The PPG waveform amplitude curve is shown in Figure 5 , with pressure on the abscissa and PPG waveform amplitude on the ordinate.

[0073] The general calculation method of the oscillometric method is: the pressure corresponding to the maximum change in vascular volume is the mean blood pressure MBP, and then the intrinsic relationship between systolic pressure SBP, diastolic pressure DBP and mean blood pressure MBP is determined based on the envelope curve characteristics, and finally the blood pressure result is obtained.

[0074] Figure 6 is a schematic diagram of a double Gaussian fitting method for calculating blood pressure. Combining Figures 5 and 6, the method for calculating blood pressure results is as follows:

[0075] First, fit the envelope curve using a double Gaussian function:

[0076] Among them, A1 and B1 are the ordinate and abscissa of the peak point of the envelope curve respectively, A2 is the ordinate of the intersection of the envelope curve and the y-axis, B2 is the difference between the abscissa of the peak point and the point on the envelope curve that is located to the left of the peak point and is half the height of the peak point (which can be called the left half-height width point), and B3 is the difference between the abscissa of the peak point and the point on the envelope curve that is located to the right of the peak point and is half the height of the peak point (which can be called the right half-height width point).

[0077] Then, after obtaining the parameters of the envelope curve, the diastolic blood pressure DBP, systolic blood pressure SBP, and mean blood pressure MBP are calculated using the following formula: SBP=2.5*MBP-1.6*DBP

[0078] In addition to using the above-mentioned double Gaussian fitting method to calculate blood pressure, you can also choose to use the envelope inflection point method to calculate blood pressure.

[0079] Specifically, the envelope inflection point method works as follows: arteries have maximum elasticity under zero transmural pressure. There are two inflection points on either side of the peak of the pressure pulse wave envelope curve. These inflection points correspond to the systolic pressure (SBP) and diastolic pressure (DBP), respectively, in the cuff pressures. These inflection points correspond to the greatest pressure change, so the absolute value of the first derivative of the corresponding envelope curve is maximum, and the second derivative of the corresponding envelope curve should be 0. Therefore, by calculating the first or second derivative of the pressure pulse wave envelope curve, the two inflection points on either side of the envelope curve peak can be found, thereby calculating the systolic pressure (SBP) and diastolic pressure (DBP), respectively.

[0080] FIG7 and FIG8 are schematic diagrams of blood pressure detection results at the third and second joints of a finger by a biometric information detection device provided in an embodiment of the present application.

[0081] In FIG7 and FIG8 , the horizontal axis represents different measured objects, and the vertical axis represents the blood pressure value. The unit of the blood pressure value is millimeter of mercury (mmHg).

[0082] Where SBP0 and DBP0 represent the true values ​​of systolic and diastolic blood pressure recorded using a mercury stethoscope, and SBP1 and DBP1 represent the values ​​of systolic and diastolic blood pressure calculated by collecting pressure pulse waves at the knuckles.

[0083] As can be seen from Figures 7 and 8, the blood pressure test results at the third and second knuckles are very close to the blood pressure test results recorded using a mercury stethoscope, and it is feasible to perform blood pressure testing at the third and second knuckles.

[0084] In Table 1 below, blood pressure was measured on 25 subjects at various locations, including the arm, wrist, third knuckle, and second knuckle. The oscillometric method was used to acquire the pressure pulse wave. The peak of the pressure pulse wave was extracted and envelope fitting was performed. Finally, the correlation coefficients between the envelope peak (EP) and systolic blood pressure (SBP), diastolic blood pressure (DBP), and mean arterial pressure (MAP) were calculated.

[0085] Table 1

[0086] From Table 1, we can see the correlation coefficients of systolic blood pressure SBP, diastolic blood pressure DBP and mean arterial pressure MAP and envelope peak EP measured at the arm, wrist, third knuckle and second knuckle. Regardless of whether it is for subjects with normal blood pressure or for subjects with hypertension, the third knuckle and second knuckle have a strong correlation with blood pressure.

[0087] Table 2 below gives the accuracy evaluation results of blood pressure data measured at the third and second knuckles, respectively.

[0088] Table 2

[0089] Wherein, MD stands for median deviation (MD), and SD stands for standard deviation (SD).

[0090] Table 2 shows the accuracy assessment results of blood pressure data measured on the third and second knuckles. Specifically, the absolute values ​​of the median difference (SBP_MD) of systolic blood pressure (SBP) and the median difference (DBP_MD) of diastolic blood pressure (DBP) are both less than 5, and the absolute values ​​of the standard deviation (SBP_SD) of systolic blood pressure (SBP) and the standard deviation (DBP_SD) of diastolic blood pressure (DBP) are both less than 8, meeting ISO medical standards.

[0091] The biometric information detection device 20 provided in the embodiment of the present application measures blood pressure at the third and second knuckles, and the accuracy of the blood pressure data obtained meets the standards.

[0092] FIG9 is a structural block diagram of an electronic device provided in an embodiment of the present application.

[0093] As shown in Figure 9, an embodiment of the present application also provides an electronic device 40, which includes the biometric information detection device 20 provided in the above-mentioned embodiment of the present application, and a display screen 30, wherein the display screen 30 is arranged on the outer surface of the device 20, and the display screen 30 is used to display the biometric information.

[0094] Specifically, the biometric information displayed on the display screen 30 includes blood pressure value, blood oxygen value and heart rate value. The display screen 30 can display the blood pressure value alone or simultaneously.

[0095] Optionally, the wearable device also includes a smart ring, a finger-clip blood pressure meter, a finger-clip blood pressure oximeter, a finger-clip multi-parameter meter, and other portable blood pressure measuring devices that can be used on the finger.

[0096] FIG10 is a schematic diagram of an electronic device provided in an embodiment of the present application.

[0097] As shown in FIG10 , the electronic device 40 is a multifunctional finger-clip blood pressure and blood oximeter that can measure biometric information including heart rate, blood oxygen level, heart rate variability (HRV), and blood pressure.

[0098] The electronic device 40 in the embodiment of the present application can facilitate hypertensive users to quickly and conveniently monitor real-time blood pressure in a non-home environment, thereby improving user experience.

[0099] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the scope of protection of the present application.

Claims

1. A biometric information detection device, comprising: A finger cot, the finger cot comprising a mechanical structure or an air bag, the mechanical structure or the air bag being used to fix the finger cot on the user's finger; A pulse wave sensor, the pulse wave sensor comprising a light emitter and a photodiode, the light emitter is used to emit a light signal, the light signal is reflected or transmitted by the object to be detected and reaches the photodiode, the photodiode is used to convert the received light signal into an electrical signal; An analog front end, the analog front end is electrically connected to the pulse wave sensor, and the analog front end is used to receive the electrical signal and output an analog front end signal; A micro control unit is electrically connected to the analog front end, and is used to receive the analog front end signal and output biometric information, wherein the biometric information includes a blood pressure value.

2. The device of claim 1, further comprising a pressure detector electrically connected to the analog front end.

3. The device according to claim 1 or 2, wherein the finger sleeve is a finger sleeve with two ends penetrating therethrough, and the cross-section of the finger sleeve with two ends penetrating therethrough is annular.

4. The device according to claim 1 or 2, wherein the finger sleeve is of a non-through type; The non-through finger cot is provided with an opening only at one end; The cross section of the non-through type finger sleeve is one of a rectangular, circular, elliptical and polygonal shape, and the non-through type finger sleeve has an internal space, and the internal space is used to accommodate the user's finger.

5. The device according to claim 3, wherein the finger sleeve further comprises an air conduit connected to the air bag.

6. The device of claim 4, wherein the mechanical structure comprises a spring structure, wherein the spring structure comprises a spring body and a connecting plate; The connecting plate is connected to one end of the spring body, the other end of the spring body is connected to the finger sleeve, and the spring structure is arranged on one side of the finger sleeve close to the opening.

7. The device according to claim 6, wherein the spring body comprises a first spring body and a second spring body, and the connecting plate comprises a first connecting plate and a second connecting plate; The first connecting plate is connected to the first spring body, and the second connecting plate is connected to the second The spring body is connected, the light emitter is arranged on the first connecting plate, and the photodiode is arranged on the second connecting plate.

8. The device according to claim 4, wherein the mechanical structure or the air bag is arranged inside the finger sleeve at a side close to the opening.

9. The device as claimed in claim 4, wherein the mechanical structure comprises a motor structure, the motor structure comprises a motor and a connecting plate, the connecting plate is connected to the motor, the motor is used to control the movement of the connecting plate, and the motor structure is arranged on a side of the finger sleeve close to the opening.

10. The apparatus of claim 1, wherein the biometric information further comprises at least one of a heart rate value and a blood oxygen value.

11. An electronic device, comprising the device as claimed in any one of claims 1 to 10, and a display screen, wherein the display screen is arranged on an outer surface of the device, and the display screen is used to display the biometric information.

12. The electronic device as claimed in claim 11, wherein the electronic device comprises a smart ring, a finger-clip blood pressure measuring instrument, a finger-clip blood pressure oximeter, and a finger-clip multi-parameter measuring instrument.

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