A physiological parameter detection method and wearable device

Abstract

The present application provides a physiological parameter detection method and a wearable device, and relates to the technical field of wearable devices. The wearable device measures PPG data at different wearing pressures. Then, the wearable device can use the signal quality of the PPG data at different wearing pressures to determine the target wearing pressure that matches the wearer of the wearable device. Afterwards, when detecting physiological parameters, the wearable device can prompt the wearer to adjust the wearable device so that the wearing pressure of the wearable device is the target wearing pressure. Afterwards, the wearable device can collect PPG data under the target wearing pressure to ensure that the signal quality of the PPG data is high, thereby ensuring the accuracy of the PPG data. Afterwards, the wearable device can use the PPG data under the target wearing pressure to determine the physiological parameters of the wearer to ensure the accuracy of the determination of the physiological parameters.

Description

Technical Field

[0001] The present application relates to the technical field of wearable devices, and in particular to a physiological parameter detection method and a wearable device. Background Art

[0002] Wearable devices such as smart watches can detect the wearer's physiological parameters (such as heart rate, blood oxygen, blood pressure, blood sugar, etc.). At present, when detecting the wearer's physiological parameters, the photoplethysmographic (PPG) module in the wearable device, such as light-emitting diode (LED), photodiode (PD), measures the attenuated light reflected and absorbed by human blood vessels and tissues, records the pulsation state of the blood vessels and measures the pulse wave, and realizes the collection of PPG data, so that the wearable device can use the PPG data to obtain the corresponding physiological parameters.

[0003] However, the accuracy of the collected PPG data is related to the tightness of the wearable device. Therefore, how to achieve the reasonable wearing of the wearable device to ensure the accuracy of the collected PPG data, thereby ensuring the accuracy of the wearer's physiological parameters calculated by the collected PPG data, has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] In view of this, the present application provides a physiological parameter detection method and a wearable device to ensure the accuracy of the PPG signal collected by the PPG sensor, thereby improving the detection accuracy of the physiological parameters.

[0005] In a first aspect, the present application provides a physiological detection method, which is applied to a wearable device, and the wearable device supports detecting physiological parameters of a wearer. The wearable device receives a first operation; the first operation is used to trigger the wearable device to enter a first physiological parameter detection mode (such as measurement mode 1, measurement mode 2, or measurement mode 3);

[0006] In response to the first operation, the wearable device outputs at least one prompt message, prompting the wearer to adjust the wearing pressure.

[0007] The wearable device receives at least one wearing operation of the wearer and obtains at least one set of measurement data; the prompt information is used to instruct the wearer to adjust the wearing pressure of the wearable device; the measurement data includes the wearing pressure and the physiological characteristic data under the wearing pressure, one wearing operation corresponds to one prompt information, and different wearing operations correspond to different wearing pressures;

[0008] Based on at least one set of measurement data, a first interface is displayed, where the first interface includes a first physiological parameter under a target wearing pressure, and the target wearing pressure includes a wearing pressure corresponding to physiological characteristic data whose data quality (or signal quality) in at least one set of measurement data is greater than a first preset quality threshold.

[0009] In the present application, the wearable device can measure physiological characteristic data under different wearing pressures, so as to determine the wearer's physiological parameters using physiological characteristic data with better data signal quality, thereby ensuring the accuracy of the physiological characteristic data used to determine the physiological parameters, thereby achieving accurate detection of physiological parameters and avoiding the situation where the data quality of the collected physiological characteristic data is poor due to the wearable device being worn too loosely or too tightly.

[0010] In a possible design, the wearable device can output at least one prompt message in the order of the wearing pressure of the wearable device from small to large, receive at least one wearing operation of the wearer, until the wearing pressure reaches a preset condition, and obtain at least one set of measurement data. Based on this, the wearable device can accurately measure the physiological characteristic data under different wearing pressures by prompting the wearer to continuously increase the wearing pressure.

[0011] In a possible design, the wearable device includes a watchband, the wearing pressure is related to the wearing tightness of the watchband, and accordingly, the wearing operation includes adjusting the wearing tightness of the watchband. The prompt information each time is used to indicate the adjustment of the wearing tightness of the watchband; the preset condition includes that the wearing tightness of the watchband cannot be further adjusted. Based on this, the wearing pressure is adjusted by adjusting the wearing tightness of the watchband, which is convenient for the wearer to adjust.

[0012] In a possible design, the watchband includes a plurality of watchband holes and a watch buckle, the wearing pressure is related to the watchband hole into which the watch buckle is inserted, and the wearing operation includes inserting the watch buckle into the watchband hole. Accordingly, the process of prompting the wearer to increase the wearing pressure may include:

[0013] The wearable device outputs a first prompt message, and the first prompt message indicates to reduce the number of strap holes into which the buckle is inserted, that is, to tighten the strap.

[0014] In response to the wearer's tightening operation on the strap, the wearable device displays a second interface, where the second interface includes a second prompt message and a first control; the second prompt message indicates whether the wearing position cannot be further adjusted, that is, whether the adjustment is too tight.

[0015] In response to the triggering operation on the first control, the wearable device collects physiological characteristic data under the current wearing pressure;

[0016] In response to the operation of continuing to adjust the wearing position, the wearable device outputs the first prompt information again, and the number of strap holes into which the clasp is inserted indicated by the first prompt information output again is less than the number of strap holes into which the clasp is inserted indicated by the first prompt information output last time;

[0017] In response to the operation of being unable to continue adjusting the wearing position, at least one set of measurement data is obtained, wherein the at least one set of measurement data may include physiological characteristic data under the current wearing pressure.

[0018] In the present application, the wearable device can increase the wearing pressure by prompting the wearer to tighten the strap. When the wearer tightens the strap, the wearable device can measure the physiological characteristic data under the current wearing pressure. After that, the wearable device can continue to prompt the wearer to tighten the strap and continue to collect the physiological characteristic data under the next wearing pressure until the strap is adjusted too tight, thereby obtaining the physiological characteristic data under different wearing pressures.

[0019] Optionally, the second interface may include a confirmation control. The triggering operation of the confirmation control may be the above-mentioned operation of being unable to continue adjusting the wearing position, which intuitively prompts the wearer how to trigger the wearable device to stop tightening the strap.

[0020] In a possible design, before outputting the first prompt information, a third interface is displayed, and the third interface includes a second control;

[0021] Receive the number of strap holes that the initial clasp is snapped into entered in the second control.

[0022] In response to the second operation, the physiological characteristic data under the current wearing pressure is collected. Accordingly, the at least one set of measurement data may include the physiological characteristic data under the current wearing pressure.

[0023] In one possible design, the number of strap holes into which the target buckle is inserted is output, wherein the number of strap holes into which the target buckle is inserted is the number of strap holes corresponding to the target wearing pressure, so as to recommend a wearing position suitable for the wearer, thereby ensuring the wearing accuracy of the wearable device, and further ensuring that physiological characteristic data with high signal quality can be collected.

[0024] In a possible design, after receiving the first operation, in response to the first operation, the wearable device may detect a wearing state of the wearable device; the wearing state includes whether the wearable device is worn correctly;

[0025] When the wearing state is detected as incorrect wearing, a third prompt information is output, and the third prompt information is used to prompt the wearable device to be worn correctly; when the wearing state is detected as correct wearing, at least one set of measurement data is obtained in response to at least one wearing operation of the wearer. Based on this, the wearable device can ensure that the physiological parameters are determined when the wearer wears the wearable device correctly, and ensure the accuracy of the determination of the physiological parameters.

[0026] In a possible design, the process of detecting the wearing state of the wearable device may include:

[0027] When the data quality of the first physiological characteristic data obtained by the initial measurement is less than the second preset quality threshold, the wearing state is incorrectly worn;

[0028] When the data quality of the first physiological characteristic data obtained by the initial measurement is greater than or equal to the second preset quality threshold, the wearing state is correct wearing. Based on this, by determining whether the data quality of the physiological characteristic data is greater than a certain threshold to determine the wearing state of the wearable device, the accuracy of the physiological parameter determination can be guaranteed to a certain extent.

[0029] In a possible design, the physiological parameter detection method is used for a wearable device to detect physiological parameters in a preset scene, and the preset scene includes a static scene, that is, the above physiological parameter detection mode represents the detection mode of physiological parameters in a static state (such as measurement mode 1 and measurement mode 2), that is, it is used to detect physiological parameters in a static state.

[0030] When the preset scene is a static scene, if the first motion data of the wearable device is less than the first preset motion threshold, and the first wearing pressure of the wearable device is less than the first preset pressure threshold, the third prompt information indicates to tighten the wearing degree;

[0031] If the first motion data is greater than or equal to the first preset motion threshold, and the first wearing pressure is greater than or equal to the first preset pressure threshold, the third prompt information indicates to remain still;

[0032] If the first motion data is greater than or equal to the first preset motion threshold, and the first wearing pressure is less than the first preset pressure threshold, the third prompt information indicates to tighten the wearing degree and keep still. Based on this, when the physiological parameter detection mode is a measurement mode in a static state, the wearable device can provide targeted prompts based on the motion data and wearing pressure of the wearable device, so that the wearer can effectively adjust the wearing state.

[0033] In a possible design, the above-mentioned preset scene is a sports scene; that is, the above-mentioned physiological parameter detection mode can represent a sports mode, such as measurement mode 3.

[0034] When the preset scene is a sports scene, if the first motion data is greater than or equal to the second preset motion threshold, and the first wearing pressure is less than the second preset pressure threshold, the third prompt information indicates to tighten the wearing degree;

[0035] If the first motion data is less than the second preset motion threshold, and the first wearing pressure is greater than or equal to the second preset wearing pressure threshold, the third prompt information indicates to exercise;

[0036] If the second motion data is less than the second preset motion threshold, and the second wearing pressure is less than the second preset pressure threshold, the third prompt information indicates to tighten the wearing degree and exercise. Based on this, when the physiological parameter detection mode is the exercise mode, the wearable device can provide targeted prompts based on the motion data and wearing pressure of the wearable device, so that the wearer can effectively adjust the wearing state.

[0037] In a possible design, the wearing pressure is related to the force with which the wearer presses the wearable device; the wearing operation includes pressing the wearable device. At least one set of measurement data includes the wearing pressure corresponding to each preset stage and the PPG data under the wearing pressure corresponding to each preset stage; the characteristic data under the wearing pressure corresponding to the preset stage represents the characteristic data collected when the wearing pressure reaches the preset wearing pressure corresponding to the preset stage;

[0038] The prompt information is used to instruct the wearer to press the wearable device;

[0039] The preset condition includes that physiological characteristic data under wearing pressure corresponding to N preset stages have been obtained, or the data quality of the physiological characteristic data under wearing pressure is less than a third preset quality threshold.

[0040] Optionally, the wearable device can increase the wearing pressure by displaying a pressure curve, where the pressure curve is used to guide the wearer to continuously press downward with a force from small to large.

[0041] During the compression process of the wearer, the wearable device can also display a specific control on the interface displaying the pressure curve, where the specific control indicates the current compression pressure, so that the wearer can intuitively know whether the current compression pressure is too large or too small.

[0042] In one possible design method, the process of determining the target wearing pressure may include: obtaining a mapping relationship between the wearing pressure and the signal quality of the physiological characteristic data based on the wearing pressure corresponding to the preset stage and the data quality of the physiological characteristic data under the wearing pressure corresponding to the preset stage; determining the target wearing pressure according to the mapping relationship, thereby determining the target wearing pressure suitable for the wearer, and ensuring that the wearable device can accurately detect the wearer's physiological parameters at the target wearing pressure.

[0043] In a possible design manner, after determining the target wearing pressure, the wearable device can save the target wearing pressure.

[0044] In a possible design, after the target wearing pressure is determined, a third operation is received, and the third operation is used to trigger the wearable device to enter a second physiological parameter detection mode;

[0045] In response to the third operation, during the physiological parameter detection process of the wearable device, outputting fourth prompt information, the fourth prompt information being used to instruct to adjust the wearing pressure of the wearable device between the detection parts to the target wearing pressure;

[0046] When it is detected that the wearing pressure of the wearable device reaches the target wearing pressure, collecting second physiological characteristic data;

[0047] A fourth interface is displayed, wherein the fourth interface includes a second physiological parameter, and the second physiological parameter is determined based on the second physiological characteristic data.

[0048] Among them, optionally, the fourth prompt information may be a prompt to press the wearable device downward, or to adjust the strap of the wearable device to the target wearing position (such as the number of strap holes into which the target buckle is inserted).

[0049] In this application, when it is necessary to measure physiological parameters, the wearable device prompts to adjust the wearing pressure of the wearable device to a target wearing pressure suitable for the wearer of the wearable device, thereby ensuring that the wearable device can collect physiological characteristic data with data quality greater than a specific threshold. When the wearing pressure of the wearable device reaches the target wearing pressure, the wearable device can collect physiological characteristic data with higher data quality, ensuring the accuracy of physiological data collection. Afterwards, the wearable device can directly use the physiological characteristic data to determine the physiological parameters, ensuring the accuracy of the physiological parameters, so that the physiological parameters can accurately reflect the physiological condition of the wearer.

[0050] In a possible design, the above physiological characteristic data may be PPG data.

[0051] In a second aspect, the present application provides a wearable device, the wearable device comprising a watch body and a watch strap connected to each other, the watch body comprising a photoplethysmography (PPG) module, a pressure sensor, a material part and a circuit board; the PPG module and the pressure sensor are electrically connected to the circuit board respectively;

[0052] The pressure sensor is located in the watch body shell, the material piece contacts the pressure sensor, the end face of the material piece facing away from the pressure sensor protrudes from the outer surface of the shell, or the end face of the material piece facing away from the pressure sensor is coplanar with the outer surface of the shell. Based on this, the pressure sensor can accurately detect the wearing pressure of the wearable device.

[0053] In a possible design, the PPG module includes an LED and a PD;

[0054] A plurality of first devices and a plurality of second devices are arranged at intervals in a circumferential direction of the third device;

[0055] Wherein, the first device is an LED, the second device is a PD, and the third device is a pressure sensor;

[0056] Alternatively, the first device is a pressure sensor, the second device is an LED, and the third device is a PD;

[0057] Alternatively, the first device is a pressure sensor, the second device is a PD, and the third device is an LED.

[0058] Optionally, the first device and the second device are spaced apart and arranged alternately.

[0059] In a possible design, the plurality of first devices and the plurality of second devices are spaced and alternately arranged in the circumferential direction of the third device, so as to ensure a larger range of data collection, thereby ensuring the accuracy of data collection.

[0060] In a possible design, a plurality of first components are arranged at intervals in the circumferential direction of the watch body;

[0061] The plurality of second components and the plurality of third components are arranged at intervals in the circumferential direction of the watch body, and the plurality of second components and the plurality of third components are located on the circumferential inner side of the plurality of first components.

[0062] Wherein, the first device is an LED, the second device is a PD, and the third device is a pressure sensor;

[0063] Alternatively, the first device is a pressure sensor, the second device is an LED, and the third device is a PD;

[0064] Alternatively, the first device is a pressure sensor, the second device is a PD, and the third device is an LED.

[0065] Optionally, the second device and the third device are spaced apart and arranged alternately.

[0066] In a possible design, a first space is defined between the plurality of second components and the plurality of third components, and at least one fourth component is disposed in the first space; the fourth component is the first component, the second component or the third component.

[0067] Optionally, the material piece is a flexible material piece.

[0068] In a third aspect, the present application provides a wearable device, the wearable device comprising a watch body and a watch strap connected to each other, the watch body comprising a PPG module, a pressure sensor and a circuit board; the PPG module and the pressure sensor are electrically connected to the circuit board respectively; the pressure sensor is located on the inner surface of the back cover of the bottom shell of the watch body. Based on this, the pressure sensor can detect the wearing pressure by sensing the strain of the back cover.

[0069] In a possible design, the pressure sensor is located on the inner side of the connection between the back cover and the frame of the bottom shell of the watch body.

[0070] In a possible design, the pressure sensor includes a thin film sensor.

[0071] In a fourth aspect, the present application provides a wearable device, the wearable device comprising a PPG module, a pressure sensor, a display screen, a memory, and one or more processors; the PPG module, the pressure sensor, the display screen, the memory, and the processor are coupled;

[0072] The PPG module is used to collect PPG data, and the pressure sensor is used to collect wearing pressure;

[0073] The display screen is used to display the image generated by the processor, and the memory is used to store computer program code, wherein the computer program code includes computer instructions; when the processor executes the computer instructions, the wearable device executes the method described above.

[0074] In a fifth aspect, the present application provides a computer program product, which, when executed on a wearable device, enables the wearable device to execute the method described above.

[0075] It can be understood that the beneficial effects that can be achieved by the wearable device described in the second aspect, the wearable device described in the third aspect, the computer storage medium described in the fourth aspect, and the computer program product described in the fifth aspect provided above can refer to the beneficial effects in the first aspect and any possible design method thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 A schematic diagram of wearing a wearable device provided in an embodiment of the present application;

[0077] Figure 2 A schematic diagram of a mode provided for an embodiment of the present application;

[0078] Figure 3 A schematic diagram of displaying physiological parameters provided in an embodiment of the present application;

[0079] Figure 4 A waveform diagram of a photoplethysmography signal provided in an embodiment of the present application Figure 1 ;

[0080] Figure 5 A schematic diagram of physiological parameter measurement provided in an embodiment of the present application;

[0081] Figure 6 A waveform diagram of a photoplethysmography signal provided in an embodiment of the present application Figure 2 ;

[0082] Figure 7 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 1 ;

[0083] Figure 8 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 2 ;

[0084] Fig. 9 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 3 ;

[0085] Fig.10 A schematic diagram of a physiological parameter measurement method provided in an embodiment of the present application Figure 1 ;

[0086] Fig.11 A prompt provided for the embodiment of the present application Figure 1 ;

[0087] Fig.12 A prompt provided for the embodiment of the present application Figure 2 ;

[0088] Fig.13 A prompt provided for the embodiment of the present application Figure 3 ;

[0089] Fig.14 A prompt provided for the embodiment of the present application Figure 4 ;

[0090] Fig.15 A prompt provided for the embodiment of the present application Figure 5 ;

[0091] Fig.16 A pressing diagram provided in an embodiment of the present application Figure 1 ;

[0092] Fig.17 A pressing guide diagram provided in an embodiment of the present application Figure 1 ;

[0093] Fig.18 A pressing guide diagram provided in an embodiment of the present application Figure 2 ;

[0094] Fig.19 A pressing diagram provided in an embodiment of the present application Figure 2 ;

[0095] Fig. 20 A pressing guide diagram provided in an embodiment of the present application Figure 3 ;

[0096] Fig.21 A schematic diagram of a physiological parameter measurement method provided in an embodiment of the present application Figure 2 ;

[0097] Fig. 22 A schematic diagram of a smart watch provided in an embodiment of the present application;

[0098] Fig.23 A prompt provided for the embodiment of the present application Figure 6 ;

[0099] Fig.24 A schematic diagram of a physiological parameter measurement method provided in an embodiment of the present application Figure 3 ;

[0100] Fig.25 A schematic diagram of sending physiological parameters provided in an embodiment of the present application;

[0101] Fig.26 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 4 ;

[0102] Fig. 27A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 5 ;

[0103] Fig.28 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 6 ;

[0104] Fig.29 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 7 ;

[0105] Fig.30 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 8 ;

[0106] Fig.31 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 9 ;

[0107] Fig.32 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 10 ;

[0108] Fig.33 A schematic diagram of the hardware structure of a smart watch provided in an embodiment of the present application Figure 10 one. DETAILED DESCRIPTION

[0109] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0110] Wearable devices (such as smart watches) are generally worn on the wearer's wrist and can detect and display the wearer's physiological parameters. Figure 1 As shown, the wearer wears the wearable device 200 on his wrist. Then, when the user wants to measure the heart rate, the user can click on Figure 2 In response to the user clicking the heart rate measurement mode control 20, the wearable device 100 can collect a PPG signal to determine the wearer's heart rate using the PPG signal and display the wearer's heart rate (e.g., Figure 3 As shown), the user can know the current heart rate status.

[0111] Exemplarily, the above-mentioned PPG signal can be collected by a PPG module in a wearable device. The wearable device can transmit a light signal into the wearer's skin tissue (or can be understood as blood, blood vessels, etc. in the skin tissue) through a PPG module (such as an LED in the PPG module). The PPG module (such as a PD in the PPG module) can receive the light signal reflected back through the skin tissue. The light signal includes the pulsation information of the wearer's blood vessels, and the pulsation information is used as a PPG signal (or called PPG data). Afterwards, the wearable device can determine physiological parameters such as heart rate by processing the PPG signal. It should be understood that after the PD receives the reflected light signal, it can convert the light signal into an electrical signal, and after analog-to-digital conversion, convert the electrical signal into a digital signal that can be used by the wearable device. The above-mentioned PPG signal may actually refer to the digital signal.

[0112] It should be noted that the waveform of the PPG signal can reflect the physiological characteristics of the wearer. Figure 4 A complete pulse waveform cycle is shown. Figure 4 Point O in the diagram can be the starting point of the cardiac ejection phase, and point A can be the highest point of aortic pressure, reflecting the maximum value of intra-arterial pressure and volume. Point B can be the point where left ventricular ejection stops, which is the peak of the tidal wave (or the peak of the reflected wave), reflecting the tension, compliance and peripheral resistance of the arterial blood vessels. Point D can be the trough of the tidal wave, i.e. the dividing point between cardiac contraction and diastole, mainly reflecting the size of peripheral resistance.

[0113] The OA' segment can be the ascending branch of the pulse waveform. When the arterial wall suddenly expands, the left ventricle ejects blood, the arterial blood pressure rises rapidly, and the wall expands. Cardiac output, ejection velocity, and resistance are the main factors affecting the amplitude and slope of the ascending branch. The greater the cardiac output, the faster the ejection velocity, the better the elasticity of the aorta, and the smaller the resistance, the greater the slope and the higher the amplitude. On the contrary, the slope is smaller and the amplitude is lower.

[0114] The A'D' segment can be the front segment of the descending branch of the pulse waveform. The A'D' segment is mainly formed because after a period of ventricular ejection, the ejection velocity begins to decrease, causing the amount of blood flowing to the periphery of the aorta to be greater than the amount of blood flowing into the aorta, the large artery changes from expansion to contraction, and the arterial blood pressure gradually decreases.

[0115] The D'O' segment can be the posterior segment of the descending branch of the pulse waveform, and can also be called the dicrotic wave. The D'O' segment is mainly formed by the ventricular dilation, the continuous decrease in arterial blood pressure, and the reflux of blood in the aorta toward the ventricle. The D'O' segment can reflect the functional status of the aorta, vascular elasticity and blood flow status.

[0116] Since physiological parameters are calculated based on PPG signals, the quality of PPG signals affects the accuracy of the determined physiological parameters. The quality of PPG signals is related to the tightness of the wearer's wearing of the wearable device. In other words, the fit pressure (or wearing pressure) between the wearable device and the wearer directly affects the quality of the PPG signal. When the wearer wears the wearable device tightly, the wearable device fits tightly against the wearer's skin and maintains a certain fit pressure, so that the light signal emitted by the PPG module in the wearable device can better penetrate the wearer's skin tissue, thereby obtaining an effective PPG signal and avoiding the interference light on the surface or shallow layer of the skin being detected by the PD in the wearable device due to the large air gap between the wearable device and the skin tissue, forming noise data. It also helps to improve the wearing stability of the wearable device, reduce the motion noise data caused by the mutual displacement between the wearable device and the skin in sports scenes, and ensure the accuracy of physiological parameter detection.

[0117] In some embodiments, a user can measure physiological parameters (such as blood pressure) by pressing a finger on a measurement device. Figure 5 As shown, the user's finger is placed on the measuring device and the measuring device is pressed downward. During the downward pressing process, the PPG module in the measuring device can emit a light signal and receive a light signal reflected back through the blood vessels in the finger to obtain a corresponding PPG signal. In addition, the pressure sensor in the measuring device can collect the pressing pressure for the PPG signal and pressing pressure collected by the PPG module, so as to determine the user's physiological parameters using the pressing pressure and PPG signal. However, during the downward pressing process of the finger, the finger will exert force, causing the internal tissue of the finger (such as muscle group meat) to change, and this change will affect the flow of blood in the blood vessels in the finger, thereby affecting the propagation of the light signal, and further affecting the PPG signal waveform. In addition, when the finger presses the measuring device downward, there is pressure between the measuring device and the finger, and this pressure will also affect the PPG signal waveform. It can be seen that the two factors will affect the PPG signal waveform at the same time, and the influence of these two factors cannot be decoupled, and the pressing pressure suitable for the user cannot be well determined, so it is impossible to ensure that the collected PPG signal can reflect the actual physical state of the user.

[0118] In view of the above problems, in order to avoid the two factors of pressing pressure (or wearing pressure) and changes in the internal tissue of the wearer's finger from affecting the waveform of the PPG signal at the same time, the wearable device in this application cannot measure physiological parameters only after the wearer presses the wearable device. The wearable device can directly emit light signals into the wrist wearing the wearable device to measure physiological parameters. And considering that the wearing pressure directly affects the waveform of the PPG signal, thereby affecting the signal quality of the PPG signal, under different wearing pressures, the waveform of the PPG signal collected by the wearable device is different, and the signal quality is different. When the PPG module is not fitted to the wearer's skin tissue, or the fitting pressure is small, the PPG signal collected by the PPG module is weak, the waveform amplitude of the PPG signal is small (that is, the pulse pulsation amplitude is small), and the signal quality of the PPG signal is low. As the fitting pressure gradually increases, that is, the wearing pressure gradually increases, the light emitted by the PPG module can effectively penetrate the wearer's skin tissue and be reflected back and received by the PPG module, so that the waveform of the PPG signal collected by the PPG module is better (such as a larger waveform amplitude), thereby making the signal quality of the PPG signal higher. As the wearing pressure continues to increase, the pressure affects the pulsation of the blood vessels in the skin, causing the pulsation volume to be continuously limited and leading to vascular occlusion. The waveform amplitude of the PPG signal gradually decreases, and the waveform of the PPG signal becomes worse again, resulting in lower signal quality of the PPG signal. For example, Figure 6 As shown, when the wearing pressure is small, the waveform amplitude of the PPG signal is small, and the waveform of the PPG signal is similar to a straight line. When the wearing pressure is large, the waveform amplitude of the PPG signal is large, and the waveform of the PPG signal is a curve. When the wearing pressure is too large, the waveform amplitude of the PPG signal becomes smaller again, and the waveform of the PPG signal is similar to a straight line. It can be seen that there is an optimal wearing pressure. When the wearing pressure between the wearer and the wearable device is the optimal wearing pressure, the waveform morphology of the PPG signal collected by the wearable device is better and the signal quality is higher.

[0119] And considering the differences in physical conditions between different users, the wearing pressure suitable for different users (that is, the optimal wearing pressure corresponding to different users) is different, that is to say, the tightness of wearable devices suitable for different users is different. Therefore, the present application proposes a scheme for determining the optimal wearing pressure corresponding to the wearer of a wearable device. The wearable device can guide the wearer to change the tightness of wearing the wearable device to change the wearing pressure of the wearable device. Among them, the wearable device can detect the wearing pressure of the wearable device using a pressure sensor. In addition, the wearable device can detect the PPG signal under different wearing pressures through the PPG module in the wearable device, and calculate the signal quality of the PPG signal under different wearing pressures. Afterwards, the wearable device can generate a mapping curve between wearing pressure and signal quality based on different wearing pressures and the signal quality of the PPG signal under different wearing pressures. Afterwards, the wearable device can determine a higher signal quality based on the mapping curve, and use the wearing pressure corresponding to the higher signal quality as the target wearing pressure, so that the wearable device can prompt the user to use the target wearing pressure to measure physiological parameters, thereby ensuring the accuracy of the physiological parameter measurement, avoiding the poor signal quality of the PPG signal collected by the wearable device due to the small wearing pressure between the wearer and the wearable device, thereby avoiding a large error between the physiological parameters determined based on the PPG signal and the actual physiological parameters of the wearer, and improving the user experience.

[0120] Exemplarily, the wearable device is a device such as a smart watch or a smart bracelet that can collect physiological parameters of the wearer of the wearable device. Figure 7 , taking the wearable device as a smart watch as an example, the hardware structure of the wearable device is described.

[0121] like Figure 7 As shown, the smart watch 200 includes: a watch body and a wristband (or watch strap) connected to each other, wherein the watch body may include a front shell ( Figure 7 (not shown), touch screen 210 (also called touch panel), display screen 220, bottom case ( Figure 7 The smartwatch may include a processor 230, a PPG module 240, a memory 250, a microphone (MIC) 260, a communication module 270, a pressure sensor 281, an acceleration (acceleration, acc) sensor 282, and an ambient light sensor 283. Although not shown, the smartwatch may also include a power supply, a power management system, an antenna, a speaker, an accelerometer, a gyroscope, etc. It will be appreciated by those skilled in the art that Figure 7 The smart watch structure shown in the figure does not constitute a limitation on the smart watch, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0122] The functional components of the smart watch 200 are introduced below:

[0123] The touch panel 210, also known as the touchpad, can collect touch operations performed by the watch user (such as operations performed by the user using fingers, stylus, or any other suitable object or accessory on or near the touch panel) and drive a corresponding connected device according to a pre-set program.

[0124] The display screen 220 can be used to display information input by the user or information provided to the user and various menus of the watch. Optionally, the display screen 220 can be configured in the form of LCD, OLED, etc. Further, the touch panel 210 can cover the display screen 220. When the touch panel 210 detects a touch operation on or near it, it is transmitted to the processor 230 to determine the type of touch event, and then the processor 230 provides corresponding visual output on the display screen 220 according to the type of touch event. Although in Figure 7 In the embodiment, the touch panel 210 and the display screen 220 are used as two independent components to realize the input and output functions of the watch, but in some embodiments, the touch panel 210 and the display screen 220 can be integrated to realize the input and output functions of the watch.

[0125] The processor 230 is used to perform system scheduling, control the display screen, touch screen, process data sent by the PPG module 240 and sensors (such as the pressure sensor 281, acceleration sensor 282, ambient light sensor 283), etc. The processor 230 can also be called a main control unit, which can include a computing unit that can process data, etc.

[0126] The PPG module 240 is used for collecting PPG signals. The PPG module may include an LED and a PD. The number of the LED may be at least one group, and the number of the PD may be at least one. Optionally, the LED and the PD may be integrated on a printed circuit board (PCB) of the smart watch 200.

[0127] The pressure sensor 281 is used to detect wearing pressure. For example, when the wearer wears the smart watch, the pressure sensor can detect the fit pressure between the smart watch and the wearer (such as the wearer's wrist), that is, measure the wearing pressure of the smart watch.

[0128] In some embodiments, the data collected by the PPG module and the pressure sensor are electrical signals. Before sending the electrical signals to the processor 230, analog-to-digital conversion is required to convert the electrical signals into analog signals so that the processor 230 can directly process the analog signals. Figure 8As shown, the PPG module and the pressure sensor are connected to different analog front ends (AFEs) respectively. The PPG module can perform analog-to-digital conversion on the PPG signal through the connected AFE. The pressure sensor can perform analog-to-digital conversion on the pressure value through the connected AFE, thereby improving the efficiency of analog-to-digital conversion of different devices. Among them, the PPG module and the AFE connected thereto can be integrated together, and the pressure sensor can be integrated together with the AFE connected thereto.

[0129] In another case, if Fig. 9 As shown, the pressure sensor can reuse the analog front end connected to the PPG module, and the PPG module can perform analog-to-digital conversion on the PPG signal through the connected AFE. The pressure sensor can also perform analog-to-digital conversion on the pressure value through the AFE connected to the PPG module, reducing the space occupied by the device in the smart watch and reducing costs.

[0130] The acceleration sensor 282 is used to detect the acceleration of the smart watch. Optionally, the acceleration can be used to determine the scene in which the smart watch is located, such as whether it is in a sports scene, a static scene, etc.

[0131] The ambient light sensor 283 is used to detect the lighting conditions of the environment in which the smart watch is located.

[0132] Communication module 270, the smart watch can exchange information with other electronic devices (such as mobile phones, tablet computers, etc.) through the communication module 270. Exemplarily, the communication module 270 may include a wireless communication module and a mobile communication module. Optionally, the wireless communication module may include a Bluetooth (BT) module, a global navigation satellite system (GNSS), and a wireless local area network (WLAN) (such as a wireless fidelity (Wi-Fi) network). The mobile communication module can provide solutions for wireless communications such as 2G / 3G / 4G / 5G applied to smart watches.

[0133] The memory 250 is used to store software programs and data. The processor 230 executes various functional applications and data processing of the watch by running the software programs and data stored in the memory. The memory 250 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created by using the watch (such as audio data, a phone book, etc.). In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as a disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0134] It should be understood that the illustrated smart watch 200 is merely one example of a wearable device, and that the smart watch 200 may have more or fewer components than shown, may combine two or more components, or may have a different configuration of components. Figure 7 The various components shown in the EMBODIMENTS 2000 may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0135] The present application provides a physiological parameter detection scheme. The wearable device can measure the physiological parameters of the wearer in different measurement modes (measurement mode in a static state, exercise mode, etc.). In order to improve the accuracy of physiological parameter measurement, the wearable device can prompt the wearer to adjust the smart watch to a suitable tightness, so that the wearable device can collect PPG signals under the wearing pressure suitable for the wearer, ensure that the collected PPG signals can reflect the actual physiological condition of the wearer, ensure the accuracy of PPG signal collection, and thus ensure the accuracy of the determined physiological parameters.

[0136] Since the wearing pressure suitable for different wearers may be different, the wearable device needs to determine the wearing pressure suitable for the wearer of the wearable device (i.e., the target wearing pressure). The wearable device can prompt the wearer to adjust the tightness of the wearable device. Different tightnesses correspond to different wearing pressures. The wearable device can detect the wearing pressure using the pressure sensor at the bottom of the wearable device, and detect the PPG signal under different wearing pressures through the PPG signal at the bottom, so as to obtain the signal quality of the PPG signal under different wearing pressures. Afterwards, the wearable device can use the signal quality of the PPG signal under different wearing pressures to establish a mapping relationship between the wearing pressure and the signal quality of the PPG signal. Afterwards, the wearable device can use the mapping relationship to determine the wearing pressure corresponding to the higher signal quality, and obtain the target wearing pressure corresponding to the wearer.

[0137] Furthermore, considering that the target wearing pressures in different measurement modes are different, for example, compared with the measurement mode in the static mode, when the wearable device is in the sports mode, the wearer (such as the wearer's wrist) has a larger range of movement. In order to maintain the stability of the wearable device, the fitting pressure between the wearable device and the wearer is larger. Accordingly, the target wearing pressure in the sports mode may be greater than the target wearing pressure in the static mode. For another example, the target wearing pressures suitable for different measurement modes in the static mode may be different, such as the target wearing pressure in the blood pressure measurement mode may be the wearing pressure corresponding to the PPG signal with a higher amplitude, and the target wearing pressure in the heart rate measurement mode may be the wearing pressure corresponding to the PPG signal with a more stable amplitude. Therefore, the wearable device can use a motion sensor (such as an accelerometer) to determine whether the wearable device is in the measurement mode triggered by the user, so that when in the measurement mode, a mapping relationship between the wearing pressure and the signal quality of the PPG signal can be established, so as to use the mapping relationship to determine the target wearing pressure corresponding to the measurement mode.

[0138] The following will take the above-mentioned wearable device as a smart watch as an example, and combine the accompanying drawings to describe in detail the physiological parameter detection method provided in the embodiment of the present application. Fig.10 As shown, the method comprises the following steps:

[0139] S401: The smart watch receives operation 1, where operation 1 is used to trigger the smart watch to enter measurement mode 1.

[0140] The measurement mode 1 indicates detecting the physiological parameter 1 in a static state.

[0141] Exemplarily, the physiological parameter 1 includes one or more of heart rate, blood oxygen, blood pressure and blood sugar. Among them, the blood oxygen physiological parameter can be blood oxygen saturation. Of course, the physiological parameter 1 can also include other types of physiological parameters, which are not limited by the present application.

[0142] For example, when a user wants the smartwatch to measure a certain physiological parameter, the user can click on the relevant measurement mode control on the interface displayed by the smartwatch. In response to the click operation on the measurement mode control, the smartwatch can enter the corresponding measurement mode. When the measurement mode belongs to the measurement mode in a static state, but not to the exercise mode, it indicates that the smartwatch needs to remain static to measure the physiological parameter corresponding to the measurement mode. For example, when the user clicks on the above-mentioned measurement mode control, the smartwatch can enter the corresponding measurement mode. Figure 2 The heart rate measurement mode control 20 is shown. In response to the click operation on the heart rate measurement mode control 20, the smart watch needs to detect the heart rate in a stationary state, and the smart watch enters the heart rate measurement mode. Here, the user's click operation on the heart rate measurement mode control 20 can be the above-mentioned operation 1, and the heart rate measurement mode can refer to the above-mentioned measurement mode 1.

[0143] It should be understood that the operation 1 listed above is only an example, and the operation may also be other types of operations, such as a user triggering specific hardware on a smart watch to trigger the smart watch to enter measurement mode 1. This application does not limit the type of operation 1, as long as it can trigger the smart watch to detect the physiological parameters of the wearer of the smart watch.

[0144] S402: In response to the above operation 1, the smart watch collects acceleration 1 of the smart watch through an acceleration sensor.

[0145] In some embodiments, in response to the above operation 1, the smart watch may first display an interface, which may include a start measurement control 1. In response to the user clicking the start measurement control 1, indicating that the measurement needs to be started, the smart watch may collect the acceleration 1 of the smart watch through the acceleration sensor.

[0146] S403. The smart watch collects photoplethysmography data 1 through the photoplethysmography module and collects wearing pressure 1 through the pressure sensor.

[0147] The wearing pressure (such as wearing pressure 1) indicates the fitting pressure between the smart watch and the wearer's wrist. When the wearer wears the smart watch on the wrist, the smart watch contacts the wearer's skin tissue and generates corresponding strain. The pressure sensor can sense the strain and obtain the corresponding fitting pressure.

[0148] S404 . The smart watch calculates signal quality 1 of the photoplethysmography data 1 .

[0149] In some embodiments, the signal quality of the PPG data (such as the above-mentioned signal quality 1) may include time domain feature quality and / or frequency domain feature quality. The time domain feature quality may include at least one feature of signal-to-noise ratio, spectrum energy ratio, amplitude, standard deviation, etc. Of course, the time domain feature quality may also include other time domain features, such as maximum value, minimum value, etc., which are not limited in the present application.

[0150] The frequency domain feature quality may include at least one of the following features: frequency spectrum distribution (such as represented by power spectrum density or energy spectrum density), frequency mean, and frequency kurtosis. Of course, the time domain feature quality may also include other frequency domain features, such as frequency range, etc., which are not limited in this application.

[0151] It should be noted that the signal qualities 1 corresponding to the measurement mode in the stationary state and the motion mode are different. For example, the signal quality 1 corresponding to the measurement mode in the stationary state may include features in the time domain features, and the signal quality 1 corresponding to the motion mode may include features in the frequency domain features. Alternatively, the signal qualities 1 corresponding to the measurement mode in the stationary state and the motion mode are the same.

[0152] The signal qualities 1 corresponding to the various measurement modes in the static state are different. For example, the signal quality 1 corresponding to the heart rate measurement mode is the signal-to-noise ratio, and the signal quality 1 corresponding to the blood pressure measurement mode is the amplitude. Alternatively, the signal qualities 1 corresponding to the various measurement modes in the static state are the same. For example, the signal quality 1 corresponding to the heart rate measurement mode is the amplitude, and the signal quality 1 corresponding to the blood pressure measurement mode is also the amplitude.

[0153] S405 : The smart watch determines whether the signal quality 1 is greater than or equal to the quality threshold 1 .

[0154] In the embodiment of the present application, when the signal quality 1 is less than the quality threshold 1, it indicates that the signal quality of the PPG data collected by the smart watch is poor, and the smart watch can output (such as voice output, and / or display) corresponding prompt information to prompt the user to wear the smart watch correctly, and the smart watch can return to the above S402 to restart data collection. Exemplarily, in order to achieve the output of targeted prompt information, the smart watch can output corresponding prompt information according to the above acceleration 1 and wearing pressure 1 to meet the measurement requirements of the above physiological parameter 1, and the smart watch can execute S406-S408.

[0155] When the signal quality 1 is greater than or equal to the quality threshold 1, it indicates that the signal quality of the PPG data collected by the smart watch is good. The smart watch can start to determine the target wearing pressure suitable for the wearer in the measurement mode 1, and the smart watch can start to execute S409.

[0156] In some embodiments, the signal quality 1 includes a feature. Accordingly, the smart watch can determine whether the feature is greater than or equal to threshold 1. In the case where the feature is greater than or equal to the quality threshold 1 corresponding to the feature, the smart watch determines that the signal quality 1 is greater than or equal to the quality threshold 1. In the case where the feature is less than the quality threshold 1 corresponding to the feature, the smart watch determines that the signal quality 1 is less than the quality threshold 1. For example, the signal quality 1 may include an amplitude. In the case where the amplitude is less than the amplitude threshold 1, the smart watch can determine that the signal quality 1 is less than the quality threshold 1, otherwise, the smart watch can determine that the signal quality 1 is greater than or equal to the quality threshold 1.

[0157] In other embodiments, the signal quality 1 includes multiple features. Accordingly, for each feature, the smart watch can determine whether the feature is greater than or equal to the threshold 1 corresponding to the feature. In the case that at least one feature is greater than or equal to the threshold 1 corresponding to the feature, the smart watch can determine that the signal quality 1 is greater than or equal to the quality threshold 1. In the case that each feature is less than the corresponding threshold 1, the smart watch can determine that the signal quality 1 is less than the quality threshold 1.

[0158] For example, signal quality 1 includes a signal-to-noise ratio and a spectrum energy ratio. When the signal-to-noise ratio is greater than or equal to a signal-to-noise ratio threshold 1, or the spectrum energy ratio is greater than or equal to a spectrum energy ratio threshold, the smart watch determines that signal quality 1 is greater than or equal to quality threshold 1. When the signal-to-noise ratio is less than the signal-to-noise ratio threshold 1, and the spectrum energy ratio is less than the spectrum energy ratio threshold, the smart watch determines that signal quality 1 is less than quality threshold 1.

[0159] Alternatively, the signal quality 1 includes multiple features. When each feature is greater than or equal to the corresponding threshold 1, the smart watch can determine that the signal quality 1 is greater than or equal to the quality threshold 1, otherwise, the smart watch determines that the signal quality 1 is less than the quality threshold 1. Still taking the example that the signal quality 1 includes the signal-to-noise ratio and the spectrum energy ratio, when the signal-to-noise ratio is greater than or equal to the signal-to-noise ratio threshold 1, and the spectrum energy ratio is greater than or equal to the spectrum energy ratio threshold, the smart watch determines that the signal quality 1 is greater than or equal to the quality threshold 1. When the signal-to-noise ratio is less than the signal-to-noise ratio threshold 1, or the spectrum energy ratio is less than the spectrum energy ratio threshold, the smart watch determines that the signal quality 1 is less than the quality threshold 1.

[0160] S406: When the wearing pressure 1 is less than the pressure threshold 1 and the acceleration 1 is less than the acceleration threshold 1, the smart watch outputs a prompt message 1, which prompts the watch to be worn tighter.

[0161] In the embodiment of the present application, the smart watch can determine whether the wearing pressure 1 is less than the pressure threshold 1, and determine whether the acceleration 1 is less than the acceleration threshold 1. When the wearing pressure 1 is less than the pressure threshold 1, it indicates that the fit pressure between the smart watch and the wearer's skin is small, and the smart watch is worn loosely. The smart watch can output the above prompt information 1 to prompt the user that the wearing degree is loose and needs to be worn tighter. Exemplarily, the prompt information 1 output by the smart watch can be a voice output prompt information 1 (such as Fig.11 As shown, the smart watch outputs a voice prompt message that the wearing degree is loose, please wear it tighter 1), and / or the smart watch displays a prompt message, such as Fig.12 As shown, the smart watch displays a message 1 indicating that the wearing degree is loose and that you should wear it tighter.

[0162] When acceleration 1 is less than acceleration threshold 1, it indicates that the smart watch is in a stationary state, which meets the requirement of measurement mode 1 for the motion state. Therefore, the smart watch does not need to output a prompt message about keeping still.

[0163] Of course, there is also a situation where the fit pressure between the smart watch and the wearer is relatively high and the smart watch is in motion. This situation will be described below in conjunction with S407.

[0164] S407: When the wearing pressure 1 is greater than or equal to the pressure threshold 1 and the acceleration 1 is greater than or equal to the acceleration threshold 1, the smart watch outputs a prompt message 2, which prompts you to keep still.

[0165] In the embodiment of the present application, when the wearing pressure 1 is greater than or equal to the pressure threshold 1, it indicates that the smart watch is worn tightly and the wearing degree of the smart watch is appropriate. Therefore, the smart watch does not need to output prompt information about the wearing tightness.

[0166] When the acceleration 1 is greater than or equal to the acceleration threshold, it indicates that the smart watch is in a large degree of motion and is in a non-static state, which does not meet the requirements of the measurement mode 1 for the motion state. Therefore, the smart watch can output a prompt message 2 to remind the wearer to remain still when measuring the above physiological parameter 1. Optionally, the smart watch can output and / or display the prompt message 2. Fig.13 As shown, the smart watch displays prompt information 2.

[0167] Of course, there is also a situation where the fitting pressure between the smart watch and the wearer is relatively small and the smart watch is in motion. This situation will be described below in conjunction with S408.

[0168] S408. When the wearing pressure 1 is less than the pressure threshold 1 and the acceleration 1 is greater than or equal to the acceleration threshold 1, the smart watch outputs a prompt message 3, which prompts the user to wear the watch tighter and keep still.

[0169] In an embodiment of the present application, when the wearing pressure 1 is less than the pressure threshold 1 and the acceleration 1 is greater than or equal to the acceleration threshold 1, it indicates that the fitting pressure between the smart watch and the wearer's skin is small and the smart watch is in motion. The smart watch can output prompt information 3 to prompt the wearer to wear it tighter and keep still.

[0170] Optionally, the smart watch can output and / or display the prompt information 3 by voice. Fig.14 As shown, the smart watch displays prompt information 3.

[0171] In the embodiment of the present application, after entering measurement mode 1, if the smart watch determines that the signal quality 1 of the collected PPG data 1 is poor, indicating that the wearing tightness and movement state of the smart watch may not meet the requirements, the smart watch can further use the acceleration collected by the acceleration sensor and the wearing pressure collected by the pressure sensor to determine the specific reasons for not meeting the requirements, thereby prompting the user to make adjustments. For example, when the wearing pressure is small, the user is prompted to wear it tighter, thereby achieving targeted prompts and enabling the wearer to make targeted adjustments, so that the wearing tightness and movement state of the smart watch meet the requirements, thereby ensuring the accuracy of PPG data collection.

[0172] In some embodiments, when it is determined that the signal quality is less than the quality threshold 1, the smart watch can re-acquire the acceleration 1, the wearing pressure 1 and the PPG data 1 to determine whether the signal quality 1 of the re-acquired PPG data 1 meets the requirements. After the requirements are met, the smart watch can start S409 described below. For example, as described above Fig.10 As shown, after executing any step in S406-S408, the smart watch returns to S402.

[0173] In some embodiments, the above-mentioned judgment of whether the smart watch is in a stationary state by the acceleration collected by the acceleration sensor is only an exemplary one, and the smart watch can also judge whether the smart watch is in a stationary state by motion data collected by other types of motion sensors. For example, the smart watch can judge whether the smart watch is in a stationary state by the angular velocity collected by the gyroscope being larger. In addition, the smart watch can also judge whether the smart watch is in a stationary state by whether the motion data collected by a variety of motion sensors is greater than the motion threshold, so as to achieve accurate judgment of the state of the smart watch. For example, the smart watch can determine that the smart watch is in motion when it is determined that the acceleration 1 collected by the acceleration sensor is greater than the acceleration threshold 1, or the angular velocity 1 collected by the gyroscope is greater than the angular velocity threshold 1.

[0174] The above introduces the case where the signal quality 1 of the PPG data 1 is poor. The following will continue to introduce the case where the signal quality 1 of the PPG data is good.

[0175] S409, the smart watch displays an interface 1, the interface 1 including a pressure curve, a control 1 and a guide prompt information 1. The pressure curve corresponds to multiple pressure stages.

[0176] The pressure curve guides the wearer to continuously increase the pressing pressure. The control 1 is used to indicate the pressing pressure currently applied by the wearer. The guiding prompt information 1 can be used to instruct the wearer to press the smart watch downward according to the pressure curve.

[0177] Pressure curve (such as Fig.15 ) is an ascending curve, which includes the pressing pressure, that is, the upper and lower limits of the wearing pressure. In order to make the wearer know more clearly how to press, the smart watch can also provide guidance prompt information 1 (such as Fig.15 to effectively guide the user to control the pressing pressure according to the pressure curve.

[0178] In the embodiment of the present application, considering that too high or too low wearing pressure will affect the wearing comfort and the waveform of the PPG data will also become worse, the smart watch uses the pressure curve to keep the pressing pressure applied by the wearer within a certain range, and makes the pressing pressure applied by the wearer continuously increase to avoid excessive or insufficient increase, thereby ensuring the precision of the wearing pressure, and thus being able to measure the PPG data under different wearing pressures more accurately.

[0179] Among them, optionally, when the above-mentioned interface is initially displayed, the above-mentioned control 1 may not be included, but after detecting that the wearer presses the wearable device, the above-mentioned control 1 is displayed according to the current pressing pressure.

[0180] S410. The smart watch obtains photoplethysmography data 2 corresponding to each pressure stage.

[0181] Among them, the PPG data 2 corresponding to the pressure stage indicates the PPG data 2 collected when the wearing pressure 2 collected by the pressure sensor belongs to the preset wearing pressure 1 corresponding to the pressure stage.

[0182] Optionally, the control 1 may be a red dot (as shown above Fig.15 The wearer presses down on the smartwatch, i.e. applies pressure perpendicular to the bottom of the smartwatch (as shown in Fig.16 As shown in the figure, when the pressing pressure applied by the wearer belongs to the wearing pressure range corresponding to the pressure curve, the smart watch can move the control 1 to the position corresponding to the pressing pressure applied by the wearer on the pressure curve, so as to intuitively show whether the pressing pressure currently applied by the user meets the requirements. Fig.15 Move the position shown to Fig.17 Position shown.

[0183] In some embodiments, during the pressing process, when the control 1 is below the pressure curve, it indicates that the pressing pressure applied by the user is small, and a pressure increase prompt message may be displayed, or a voice output may be used to increase the pressure prompt message (such as Fig.18 As shown, the smart watch voice outputs "Please increase the pressing pressure"). When the control 1 is above the pressure curve, it indicates that the pressing pressure applied by the user is too large, and a prompt message to reduce the pressure can be displayed, or a voice prompt message to reduce the pressure can be output to achieve correct guidance on the pressing pressure.

[0184] Optionally, the control 1 being a red dot is only an example, and the color of the control 1 may also be other colors, or other graphics, such as a square, etc. In addition, the control 1 and the pressure curve may be different colors, for example, the control 1 is red, and the pressure curve is green, so that the user can be clearly and intuitively prompted with the required pressing pressure and the currently applied pressing pressure, thereby guiding the user to apply pressure correctly.

[0185] In some embodiments, in order to better guide the wearer to press the smart watch, the above interface 1 may also include press position indication information, which indicates the position where the user's finger is placed. For example, the press position indication information may include the index finger placement position (such as the above Fig.15 "index finger" shown) and thumb placement (as above Fig.15 ) to indicate where the wearer's finger should be placed when pressing the smartwatch, such as Fig.19 As shown, the wearer's thumb is placed at the thumb placement position, and the wearer's index finger is placed at the index finger placement position. Based on this, the body of the smart watch is stabilized by the fingers, the stability of the applied pressure during the measurement process is maintained, and the measurement error caused by the skewness and warping of the watch body is avoided.

[0186] In some embodiments, the content included in the above interface 1 is only an example, and the present application does not limit it. For example, the above interface 1 may not include the guidance prompt information 1, and the smart watch may display the guidance prompt information 1, and then display the interface 1 including the pressure curve and the control 1.

[0187] In the embodiment of the present application, since it is necessary to determine the target wearing pressure suitable for the wearer of the smart watch, the smart watch needs to record the PPG signals collected under different wearing pressures. The smart watch can guide the wearer to continuously increase the pressing pressure according to the 1st to Nth pressure stages. When the pressing pressure (or wearing pressure 2) belongs to the preset wearing pressure 1 corresponding to a certain pressure stage, it indicates that the smart watch has entered the measurement of the pressure stage. The smart watch can use the wearing pressure 2 as the wearing pressure 2 corresponding to the pressure stage, and can output a prompt message to maintain the current pressing degree to prompt the wearer to stop pressing, so that the smart watch can measure the PPG data under the wearing pressure 2.

[0188] Specifically, the smart watch emits a light signal through the light-emitting diode in the PPG module (as mentioned above Fig.16 As shown in Figure 2), the light signal enters the blood vessels in the wearer's skin and, after reflection, is received by the photodiode in the PPG module (as shown above). Fig.16After time 1 has passed, it indicates that the pressure stage can be ended and the next pressure stage can be entered. The smart watch can use the PPG data collected during time 1 as the PPG data corresponding to the pressure stage, that is, as the PPG data corresponding to the wearing pressure 2 corresponding to the pressure stage. After the PPG data corresponding to the Nth pressure stage is measured, the smart watch can output a prompt message to end the measurement.

[0189] For example, the above time 1 is 3 seconds, N is 2, the preset wearing pressure 1 corresponding to the first pressure stage is 0.2N, and the preset wearing pressure corresponding to the second pressure stage is 0.5N. The smart watch begins to guide the user to continuously increase the pressing pressure. When the pressing pressure (i.e., wearing pressure 2) collected by the pressure sensor reaches 0.2N, the smart watch can prompt the user to stay still and stop pressing. The smart watch collects PPG data. After 3 seconds, the smart watch can use the PPG data collected within these 3 seconds as the PPG data 2 corresponding to the first pressure stage, that is, as the PPG data 2 corresponding to 0.2N.

[0190] In addition, the smartwatch can continue to output the next stage measurement prompt information to prompt the wearer to start the second pressure stage and continue to increase the pressing pressure. When the pressing pressure collected by the pressure sensor reaches 0.5N, the smartwatch can prompt the user to stay still and stop pressing. The smartwatch collects PPG data. After 3 seconds, the smartwatch can use the PPG data collected in these 3 seconds as PPG data 2 corresponding to the second pressure stage, that is, as PPG data 2 corresponding to 0.5N.

[0191] It should be noted that the preset wearing pressure 1 corresponding to the above pressure stage is a numerical value which is only an example, and the preset wearing pressure 1 may also be multiple numerical values ​​or an interval.

[0192] In some embodiments, the above interface 1 can also display PPG data corresponding to the pressure stage, such as Fig.15 The PPG waveform shown.

[0193] In some embodiments, the above interface 1 may also display the wearing pressure 2 corresponding to the pressure stage, such as Fig.15 0.2N shown.

[0194] S411. For each pressure stage, the smart watch calculates the signal quality 2 corresponding to the pressure stage according to the photoplethysmography data 2 corresponding to the pressure stage.

[0195] The calculation process of signal quality 2 can refer to the calculation process of signal quality 1, which will not be described in detail. In addition, the features included in signal quality 2 can be the same as or different from the features included in signal quality 1, and this application does not limit them.

[0196] In some embodiments, after determining the signal quality 2 corresponding to the pressure stage, the signal quality 2 may also be displayed. Fig.15 As shown, the smart watch can display the signal quality index (or signal quality score) corresponding to the signal quality 2, so that the wearer can clearly obtain the quality of the PPG data collected by the smart watch.

[0197] Optionally, the smart watch may search for a quality range corresponding to signal quality 2 , and use the signal quality index corresponding to the quality range as the signal quality index corresponding to signal quality 2 .

[0198] S412: The smart watch generates a mapping curve 1 between the signal quality and the wearing pressure based on the signal quality 2 corresponding to each pressing stage and the wearing pressure 2 corresponding to each pressing stage.

[0199] Among them, referring to the above content, it can be known that the wearing pressure 2 corresponding to the pressing stage and the wearing pressure 2 corresponding to the pressing stage are in a corresponding relationship. Therefore, the smart watch can obtain the signal quality 2 corresponding to different wearing pressures 2. Afterwards, the smart watch can use each wearing pressure 2 and its corresponding signal quality 2 as a coordinate. Then, the smart watch can map multiple coordinates in the XY coordinate system. Axis 1 in the XY coordinate system is the wearing pressure, axis 2 is the signal quality, and axis 1 and axis 2 are different coordinate axes in the X-axis and Y-axis. For example, axis 1 is the horizontal axis and axis 2 is the vertical axis.

[0200] Afterwards, the smart watch can perform curve fitting on multiple coordinates in the XY coordinate system to obtain a mapping curve 1, which can reflect the mapping relationship between wearing pressure and signal quality.

[0201] In some embodiments, after measuring and obtaining the PPG data corresponding to the i-th stage, if the waveform feature of the PPG data disappears, it indicates that the wearing pressure is too high, so the smart watch can end the measurement and output a prompt message to end the measurement. Afterwards, the smart watch can generate a mapping curve 1 using the wearing pressure corresponding to the 1st to i-th stages and the signal quality 2.

[0202] Optionally, the smart watch can determine whether the waveform feature of the PPG data corresponding to the pressure stage disappears by judging whether the signal quality 2 corresponding to the pressure stage is less than the quality threshold 2. Specifically, when the signal quality 2 corresponding to the pressure stage is less than the quality threshold 2, it indicates that the signal quality of the PPG data is too poor, and the smart watch can determine that the waveform feature of the PPG data corresponding to the pressure stage disappears.

[0203] When the signal quality 2 corresponding to the pressure stage is greater than or equal to the quality threshold 2, it indicates that the waveform shape of the PPG data is good (such as a larger waveform amplitude), and the smart watch can determine that the waveform characteristics of the PPG data corresponding to the pressure stage have not disappeared.

[0204] In some embodiments, the above mapping curve 1 is only a possible representation of the mapping relationship between signal quality and wearing pressure (herein referred to as mapping relationship 1), and the mapping relationship 1 can also be represented in other forms, such as by a file, and the file (such as a table) can include multiple wearing pressures 2 and the signal quality corresponding to each wearing pressure 2. Accordingly, the smart watch can use the data in the table to determine the target wearing pressure.

[0205] Optionally, after the mapping relationship (such as a mapping curve) is obtained, the mapping curve may also be displayed in the form of an interface.

[0206] S413 : The smart watch uses the wearing pressure corresponding to the signal quality on mapping curve 1 that is greater than or equal to quality threshold 3 as the target wearing pressure corresponding to measurement mode 1 .

[0207] Optionally, the target wearing pressure may be a pressure interval or one or more pressures.

[0208] It should be noted that the above S413 is only a possible implementation method for the smart watch to determine the target wearing pressure according to the mapping curve 1. In other words, the above S413 is only a possible implementation method for the smart watch to determine the target wearing pressure according to the mapping relationship 1. The smart watch can also use the wearing pressure corresponding to the highest signal quality as the target wearing pressure based on the mapping relationship 1. For example, the signal quality is the amplitude, and the mapping relationship 1 is the mapping curve 1. The smart watch can use the wearing pressure corresponding to the maximum amplitude on the mapping curve 1 as the target wearing pressure. It can be understood that the highest signal quality is greater than the above quality threshold 3.

[0209] In some embodiments, the smartwatch may save the target wearing pressure after determining the target wearing pressure corresponding to measurement mode 1. Optionally, the smartwatch may also display the target wearing pressure so that the wearer can know the appropriate wearing pressure.

[0210] The above describes the process of determining the target wearing pressure corresponding to the measurement mode 1 suitable for the wearer. Since the wearer enters the above measurement mode 1, he ultimately wants to measure the physiological parameter 1. Therefore, in one case, the smart watch can output a target wearing pressure prompt, which is used to prompt the wearing pressure to reach the target wearing pressure. In the case where the wearing pressure collected by the pressure sensor belongs to the target wearing pressure, the smart watch can collect PPG data, thereby using the PPG data to determine the physiological parameter 1, and output the physiological parameter 1. In another case, generally speaking, there is a wearing pressure 2 belonging to the target wearing pressure among the wearing pressures 2 corresponding to the above multiple pressure stages. Therefore, the smart watch can directly use the PPG data corresponding to the wearing pressure 2 belonging to the target wearing pressure to determine the physiological parameter 1, and this situation will be described in detail below.

[0211] S414. The smart watch calculates the physiological parameter 1 corresponding to the measurement mode 1 based on the photoplethysmography data 2 corresponding to the target wearing pressure.

[0212] S415 . The smart watch displays an interface 2 , which includes a physiological parameter 1 .

[0213] For example, if measurement mode 1 is a heart rate measurement mode and physiological parameter 1 is a heart rate, then the smartwatch may display the following information: Figure 3 The interface shown (i.e., interface 2).

[0214] In some embodiments, after receiving the above operation 1, in response to the operation 1, the smart watch may first determine whether there is a target wearing pressure corresponding to measurement mode 1. If not, the smart watch may execute the above S401-S415 to determine the target wearing pressure corresponding to measurement mode 1.

[0215] If there is a target wearing pressure corresponding to measurement mode 1, the smart watch does not need to execute the above S401-S415, and can output a target wearing pressure prompt, which is used to prompt the wearing pressure to reach the target wearing pressure. For example, the target wearing pressure prompt may include: Fig. 20 The guide pressure curve, control 2 and guide prompt information 2 shown, the guide pressure curve corresponds to the target wearing pressure, and control 2 is used to indicate the pressing pressure currently applied by the wearer. The guide prompt information 2 is used to press the smart watch downward according to the pressure curve.

[0216] Afterwards, when the collected wearing pressure belongs to the target wearing pressure, the smart watch starts to collect PPG data to ensure the accuracy of the collection of PPG data. Then, the smart watch can use the PPG data to calculate the wearer's physiological parameter 1 to ensure the accuracy of the determination of the physiological parameter 1. Optionally, when the collected wearing pressure belongs to the target wearing pressure, the smart watch can tell the wearer to stay still, that is, keep the current pressing state, and stop pressing. Then, under the wearing pressure, start collecting PPG data. After the set time, stop collecting, so as to obtain the PPG data under the wearing pressure.

[0217] Optionally, when the collected wearing pressure is within the target wearing pressure, the smart watch can output corresponding prompt information for maintaining the current pressing degree to prompt the user to remain still so that the wearing pressure of the smart watch remains unchanged. For example, the prompt information for maintaining the current pressing degree can be "please maintain for 4 seconds" so that the smart device can collect PPG data within these 4 seconds under the target wearing pressure.

[0218] Optionally, if there is a target wearing pressure corresponding to measurement mode 1, the smart watch can determine whether the currently collected wearing pressure belongs to the target wearing pressure corresponding to measurement mode 1. If it belongs to the target wearing pressure, it means that under this wearing pressure, the waveform of the PPG data collected by the smart watch is good, and the smart watch can start collecting PPG data. If it does not belong to the target wearing pressure, the smart watch can output a target wearing pressure prompt.

[0219] In the embodiment of the present application, the wearer presses the body of the smart watch to change the wearing pressure of the smart watch, so that the smart watch can measure the PPG data under different wearing pressures. And because the smart watch determines the PPG data by emitting light to the wrist wearing the smart watch, the PPG data is only affected by the wearing pressure, that is, the pressing pressure, and is not affected by other factors, so the accuracy of the PPG data measurement can be guaranteed.

[0220] In some embodiments, since the signal quality of the PPG data under different wearing pressures needs to be determined, after receiving the above operation 1, the smart watch may not need to collect the wearing pressure 1 and the PPG data 1, and does not need to determine whether the signal quality 1 is greater than or equal to the quality threshold 1, but may directly use the acceleration 1 to determine whether the smart watch is in a stationary state. If it is in a stationary state, the smart watch may directly execute the above S409. If it is not in a stationary state, the smart watch may directly prompt to keep still.

[0221] The above describes a method of guiding the wearer to increase the pressing pressure of the smart watch body to change the wearing pressure of the smart watch to measure the PPG data under different wearing pressures, and then use the PPG data under different wearing pressures to determine the target wearing pressure corresponding to the measurement mode. However, this method requires the wearer to have good control over the pressure application process and has low operability. Fig.21 , we will continue to introduce another method for determining the target wearing pressure. Fig.21 As shown, the process of this method is as follows:

[0222] S501: The smart watch receives operation 2, where operation 2 is used to trigger the smart watch to enter measurement mode 2. Measurement mode 2 indicates detecting physiological parameter 2 in a static state.

[0223] The implementation process of S501 may refer to the implementation process of S401, which will not be described in detail here. The measurement mode 2 may be the same as the measurement mode 1, or may be different.

[0224] S502, the smart watch displays an interface 3, which includes an input control 1 and a start measurement control 2, wherein the input control 1 is used to input the number of the currently buckled strap holes.

[0225] The number of strap holes currently buckled indicates the number of buckles of the current smart watch (e.g. Fig. 22 The position of the strap hole where the smart watch is buckled (as shown in the figure) indicates the current wearing position of the smart watch. Fig. 22 As shown, the strap of the smart watch includes a plurality of strap holes. When the wearer wears the smart watch, the strap hole of the smart watch is buckled to the fourth strap hole on the strap. Afterwards, the wearer inputs the above operation 2, the smart watch can display interface 3, and the wearer can input 4 in the input control 1 on interface 3.

[0226] It should be understood that the fourth strap hole is based on the order from close to the watch body to far from the watch body. If it is based on the order from far to close to the watch body, the wearer can enter 2 in the input control 1 (or the second control). In order to ensure the accuracy of the measurement, the above interface 3 can include sequential prompt information to prompt the user to determine the number of strap holes currently buckled based on that order.

[0227] In some embodiments, the input control 1 refers to a control capable of inputting characters, such as a text box.

[0228] S503: In response to a click operation on the start measurement control 2, the smart watch obtains the number of currently buckled strap holes.

[0229] S504: The smart watch collects acceleration 2 of the smart watch through an acceleration sensor.

[0230] S505. The smart watch collects photoplethysmography data 3 through the photoplethysmography module, and collects wearing pressure 3 corresponding to the number of currently buckled strap holes through the pressure sensor.

[0231] Among them, the wearing pressure 3 corresponding to the number of strap holes currently buckled represents the wearing pressure of the smart watch when the wearing position of the smart watch is the position corresponding to the number of strap holes currently buckled.

[0232] S506 . The smart watch calculates the signal quality 3 of the photoplethysmography data 3 .

[0233] S507 : The smart watch determines whether the signal quality 3 is greater than or equal to the quality threshold 4 .

[0234] In the embodiment of the present application, when the signal quality 3 is less than the quality threshold 4, it indicates that the signal quality of the PPG data collected by the smart watch is poor in the current wearing state, and the smart watch can output corresponding prompt information to prompt the user to wear the smart watch correctly. Exemplarily, in order to achieve the output of targeted prompt information, the smart watch can output corresponding prompt information according to the above acceleration 2 and wearing pressure 3 to meet the measurement requirements of the above physiological parameter 2, and the smart watch can execute S508-S510.

[0235] When the signal quality 3 is greater than or equal to the quality threshold 4 , the smart watch may start to determine a target wearing pressure suitable for the wearer in the measurement mode 2 , and the smart watch may start to execute S511 .

[0236] The implementation process of the above S503-S507 may refer to the implementation process of the above S402-S405.

[0237] S508. When the wearing pressure 3 is less than the pressure threshold 2 and the acceleration 2 is less than the acceleration threshold 2, the smart watch outputs a prompt message 4, which prompts the watch to be worn tighter.

[0238] S509: When the wearing pressure 3 is greater than or equal to the pressure threshold 2, and the acceleration 2 is greater than or equal to the acceleration threshold 2, the smart watch outputs a prompt message 5, which prompts you to keep still.

[0239] S510: When the wearing pressure 3 is less than the pressure threshold 2 and the acceleration 2 is greater than or equal to the acceleration threshold 2, the smart watch outputs a prompt message 6, which prompts the watch to be worn more tightly and to remain still.

[0240] In some embodiments, when it is determined that the signal quality 3 is less than the quality threshold 4, the smart watch can re-acquire the acceleration 2, the wearing pressure 2 and the PPG data 3 to determine whether the signal quality 3 of the re-acquired PPG data 3 meets the requirements. After the requirements are met, the smart watch can start S511 described below. For example, as described above Fig.21 As shown, after executing any step in S508-S510, the smart watch returns to S504.

[0241] The implementation process of the above S507-S510 may refer to the above S406-S408, which will not be described in detail here.

[0242] S511. The smart watch outputs a reminder message to keep still.

[0243] In the embodiment of the present application, when the signal quality 3 meets the requirement, the smart watch can start measuring the PPG data 4 under the current wearing pressure. In order to ensure the accuracy of the PPG data measurement, the smart watch can prompt the wearer to stay still.

[0244] S512. The smart watch collects photoplethysmography data 4 through the photoplethysmography data module, and collects wearing pressure 4 corresponding to the number of strap holes currently buckled through the pressure sensor.

[0245] The wearing pressure 4 represents the wearing pressure of the smart watch when the wearing position of the smart watch is the position corresponding to the number of the currently buckled strap holes. Optionally, after executing the above S505, the smart watch may not collect the wearing pressure 4 through the pressure sensor, but may directly use the above wearing pressure 3 as the wearing pressure 4.

[0246] Optionally, the smart watch may not execute the above S511, but may directly execute S512.

[0247] S513. After time 2 has passed, the smart watch calculates the signal quality 4 of the photoplethysmography data 4 collected during the time 2, and obtains the signal quality 4 corresponding to the number of strap holes currently buckled.

[0248] Optionally, during time 2, the smart watch can determine whether the smart watch is in a stationary state according to the acceleration collected by the acceleration sensor. If it is in a stationary state, the measurement can continue. If it is not in a stationary state, the smart watch can return to the above S511.

[0249] In some embodiments, since the signal quality 3 is good, it indicates that the movement amplitude of the smart watch is small, the wearing pressure is relatively large, and the time 2 is relatively short. Therefore, when the smart watch is not sure that the signal quality 3 is greater than or equal to the quality threshold 4, there is no need to execute S511, but directly execute S512.

[0250] S514, the smart watch displays an interface 4, which includes a prompt message 7 and a start measurement control 3. The prompt message 7 is used to prompt to tighten one grid.

[0251] Among them, the start measurement control 3 indicates that one grid has been tightened.

[0252] For example, after time 2 has passed, the smart watch can output a prompt message 7 (or referred to as the first prompt message) to prompt the wearer that the current measurement is completed and that a strap hole needs to be fastened to prompt the measurement of the PPG data under the next wearing pressure. Afterwards, when the wearer has fastened the strap, he can click the above-mentioned start measurement control 3 to let the smart watch know that the wearing pressure has changed and continue to measure the PPG data and wearing pressure.

[0253] Optionally, the outputting of the prompt information 7 means that the smart watch can output the prompt information 7 by voice or display the prompt information 7 (such as Fig.23 The “Please fasten one grid” shown is the prompt message 7).

[0254] It should be noted that the smart watch may not prompt the wearer to adjust the strap through the display interface 4, but may output the prompt information 7 through voice. After the wearer fastens the strap one notch, he may input a specific operation, which is used to trigger the smart watch to start measuring the PPG data after fastening the strap one notch. The specific operation may be pre-set by the smart watch or customized by the wearer.

[0255] In some embodiments, the smartwatch can determine whether the wearer has buckled one notch by wearing pressure collected by the pressure sensor. After the collected wearing pressure increases, the smartwatch can determine that the wearer has buckled one notch. Based on this, the smartwatch may not display the above interface 4. After determining that the wearer has buckled one notch, the smartwatch display interface 5 in S515 below can be executed.

[0256] S515. In response to a click operation on the start measurement control 3, the smart watch displays an interface 5, which includes a prompt message 8, a confirmation control, and a rejection control. The prompt message 8 indicates whether the wearing is too tight.

[0257] The confirmation control indicates that the wearer is wearing too tight. The confirmation control is used to trigger the smart watch to end the measurement.

[0258] The reject control indicates that the wearing is not too tight. The reject control is used to trigger the smart watch to continue to obtain PPG data and wearing pressure. In order to ensure wearing comfort, the smart watch can determine whether the wearing is too tight for the wearer. If it is not too tight, the smart watch can continue to measure PPG data and wearing pressure, and then S516 can be executed.

[0259] If it is too tight, the measurement can be ended, and the smart watch can determine the target wearing pressure, and then S517 can be executed.

[0260] Optionally, the prompt information 8 may also be referred to as second prompt information, and the rejection control may be referred to as a first control.

[0261] In addition, the functions of the above-mentioned rejection control or confirmation control may also be executed through other operations.

[0262] S516: In response to the click operation on the reject control, the smart watch returns to the above S504.

[0263] For example, after measuring the wearing pressure 4 and PPG data 4 when the number of holes of the currently buckled watchband is 4, the smart watch tightens the watchband by one notch. After the wearer clicks the reject control, indicating that the wearer has tightened the watchband by one notch, the smart watch responds to the click operation of the reject control and continues to measure the wearing pressure 4 and PPG data 4 when the number of holes of the currently buckled watchband is 3.

[0264] S517. In response to a click operation on the confirmation control, the smart watch generates a mapping curve 2 between signal quality and wearing pressure based on the wearing pressure 4 corresponding to the number of each strap hole and the signal quality 4 corresponding to the number of each strap hole that have been measured.

[0265] Optionally, in response to a click operation on the confirmation control, the smart watch may also directly return to the above S514 to achieve rapid determination of the target wearing pressure.

[0266] S518 . The smart watch uses the wearing pressure corresponding to the signal quality on mapping curve 2 that is greater than or equal to quality threshold 5 as the target wearing pressure corresponding to measurement mode 2 .

[0267] The implementation process of the above S517-S518 can refer to the description of the above S412-S413, which will not be repeated here. For the convenience of understanding, the number of strap holes can be equivalent to the above pressure stage, the wearing pressure 4 corresponding to the number of strap holes can be equivalent to the wearing pressure 2 corresponding to the above pressure stage, and the PPG data corresponding to the number of strap holes can be equivalent to the PPG data 2 corresponding to the above pressure stage.

[0268] S519. The smart watch outputs the number of strap holes corresponding to the target wearing pressure.

[0269] Optionally, the target wearing pressure may be a pressure interval or one or more pressures. When the target wearing pressure is a single pressure, the number of strap holes corresponding to the target wearing pressure (or the number of strap holes into which the target buckle is inserted) may be the number of strap holes corresponding to the wearing pressure 4 that is the smallest difference from the target wearing pressure. When the target wearing pressure is multiple pressures, for each target wearing pressure, the number of strap holes corresponding to the target wearing pressure may be the number of strap holes corresponding to the wearing pressure 4 that is the smallest difference from the target wearing pressure.

[0270] When the target wearing pressure is a pressure interval, the number of strap holes corresponding to the target wearing pressure may be the number of strap holes corresponding to the pressure in the pressure interval. For example, the pressure interval includes pressure A, which is the same as a wearing pressure 4, and therefore, the number of strap holes corresponding to the pressure A actually refers to the number of strap holes corresponding to the wearing pressure 4.

[0271] In the present application, the smart watch voice outputs or displays the number of strap holes corresponding to the target wearing pressure, prompting the wearer to measure physiological parameter 2. The watch buckle can be fastened to the strap hole corresponding to the number of strap holes corresponding to the target wearing pressure, so that the wearing pressure of the smart watch is suitable for the wearer, thereby making the signal quality of the PPG data collected under the wearing pressure higher, which can effectively reflect the actual physical condition of the wearer and ensure the accuracy of the PPG data.

[0272] S520. The smart watch calculates physiological parameter 2 corresponding to measurement mode 2 based on photoplethysmography data 4 corresponding to the target wearing pressure.

[0273] S521 . The smart watch displays an interface 6 , which includes a physiological parameter 2 .

[0274] The implementation process of the above S520-S521 may refer to the description of the above S414-S415.

[0275] In some embodiments, after receiving the above operation 2, in response to the operation 2, the smart watch may first determine whether there is a target wearing pressure corresponding to measurement mode 2. If not, the smart watch may execute the above S520-S521 to determine the target wearing pressure corresponding to measurement mode 2.

[0276] If there is a target wearing pressure corresponding to measurement mode 2, the smart watch directly outputs the number of strap holes corresponding to the target wearing pressure to prompt the user to fasten the clasp to the strap hole corresponding to the number of strap holes corresponding to the target wearing pressure.

[0277] When the wearing pressure collected by the smart watch belongs to the target wearing pressure, the wearer has adjusted the wearing position of the watchband and started to collect PPG data to ensure the accuracy of the collection of PPG data. Then, the smart watch can use the PPG data to calculate the wearer's physiological parameter 2 to ensure the accuracy of the determination of the physiological parameter 2.

[0278] Optionally, when the collected wearing pressure belongs to the target wearing pressure, the smart watch can output a reminder message to keep still. After a certain period of time, the smart watch can determine the physiological parameter 2 using the PPG data collected during this period of time.

[0279] Optionally, if there is a target wearing pressure corresponding to measurement mode 2, the smart watch can determine whether the currently collected wearing pressure belongs to the target wearing pressure corresponding to measurement mode 2. If it belongs to the target wearing pressure, it means that under this wearing pressure, the waveform of the PPG data collected by the smart watch is good, and the smart watch can start collecting PPG data. If it does not belong to the target wearing pressure, the smart watch can output the number of strap holes corresponding to the above target wearing pressure.

[0280] In some embodiments, the above S501-S519 introduces that when there are strap holes on the strap, the wearing position of the smart watch can be represented by the number of strap holes buckled by the smart watch, so as to determine the target wearing pressure by adjusting the number of strap holes. Of course, there are also cases where there are no strap holes on the strap. In this case, the smart watch can measure the PPG data and wearing pressure corresponding to the current wearing position. After that, the smart watch can prompt the wearer to fasten the strap. After the wearer fastens the strap, the smart watch determines whether it is worn too tight. When it is not worn too tight, the smart watch can continue to measure the PPG data and wearing pressure corresponding to the current wearing position. When it is worn too tight, the smart watch can end the measurement, and use the wearing pressure corresponding to the measured wearing position and the PPG data corresponding to the measured wearing position to determine the mapping curve between the signal quality and the wearing pressure, so that the smart watch uses the mapping curve to determine the target wearing pressure. Specifically, when there are no strap holes on the strap, the process of the smart watch determining the target wearing pressure can refer to the relevant contents of S501-S519.

[0281] The above introduces the measurement of physiological parameters in static scenes. Of course, the wearer often uses smart watches to detect physiological parameters in sports scenes. In order to ensure the accuracy of physiological parameter detection in sports scenes, smart watches also need to determine the target wearing pressure suitable for the wearer in sports scenes. Fig.24 , the process of determining the target wearing pressure in sports scenarios is introduced.

[0282] S601: The smart watch receives operation 3, where operation 3 is used to trigger the smart watch to enter measurement mode 3. Measurement mode 3 indicates detecting physiological parameter 3 in a motion state.

[0283] Exemplarily, measurement mode 3 represents a sports mode, for example, a running mode (such as an indoor running mode, an outdoor running mode), a walking mode, a yoga mode, a mountain climbing mode, a sailing mode, a swimming mode, and the like.

[0284] The above-mentioned physiological parameter 3 may include heart rate or other physiological parameters.

[0285] S602, the smart watch displays an interface 7, which includes an input control 2 and a start measurement control 4, wherein the input control 2 is used to input the number of the currently buckled strap holes.

[0286] S603: In response to a click operation on the start measurement control 4, the smart watch obtains the number of currently buckled strap holes.

[0287] S604: The smart watch collects acceleration 3 of the smart watch through an acceleration sensor.

[0288] S605. The smart watch collects photoplethysmography data 5 through the photoplethysmography module, and collects wearing pressure 5 corresponding to the number of strap holes currently buckled through the pressure sensor.

[0289] S606 . The smart watch calculates the signal quality 5 of the photoplethysmography data 5 .

[0290] S607 : The smart watch determines whether the signal quality 5 is greater than or equal to the quality threshold 6 .

[0291] In the embodiment of the present application, when the signal quality 6 is less than the quality threshold 4, it indicates that the signal quality of the PPG data collected by the smart watch is poor in the current wearing state, and the smart watch can output corresponding prompt information to prompt the user to wear the smart watch correctly. Exemplarily, in order to achieve the output of targeted prompt information, the smart watch can output corresponding prompt information according to the above acceleration 3 and wearing pressure 5 to meet the measurement requirements of the above physiological parameter 3, and the smart watch can execute S608-S610.

[0292] When the signal quality 5 is greater than or equal to the quality threshold 6 , the smart watch may start to determine a target wearing pressure suitable for the wearer in the measurement mode 3 , and the smart watch may start to execute S611 .

[0293] S608. When the wearing pressure 5 is less than the pressure threshold 3 and the acceleration 3 is greater than or equal to the acceleration threshold 3, the smart watch outputs a prompt message 9, which prompts the watch to be worn tighter.

[0294] S609: When the wearing pressure 5 is greater than or equal to the pressure threshold 3 and the acceleration 3 is less than the acceleration threshold 3, the smart watch outputs a prompt message 10, which prompts you to perform corresponding exercise.

[0295] For example, the measurement mode 3 is a running mode, and the prompt message 10 may be "please start running".

[0296] S610: When the wearing pressure 5 is less than the pressure threshold 3 and the acceleration 3 is less than the acceleration threshold 3, the smart watch outputs a prompt message 11, which prompts the smart watch to wear the watch tighter and perform corresponding exercises.

[0297] Among them, the implementation process of the above S608-S610 can refer to the above S406-S408, except that since S406-S408 correspond to a static state, and S608-S610 correspond to a moving state, acceleration 3 is used to determine whether the smart watch is in a moving state.

[0298] S611. The smart watch outputs a reminder message to keep exercising.

[0299] S612. The smart watch collects photoplethysmography data 6 through the PPG module, and collects wearing pressure 6 corresponding to the number of strap holes currently buckled through the pressure sensor.

[0300] Optionally, the smart watch may not execute the above S611, but may directly execute S612.

[0301] S613. After time 3 has passed, the smart watch calculates the signal quality 6 of the photoplethysmography data 6 collected during the time 3, and obtains the signal quality 6 corresponding to the number of strap holes currently buckled.

[0302] S614, the smart watch displays an interface 8, which includes a prompt message 12 and a start measurement control 5. The prompt message 12 is used to prompt to tighten one grid.

[0303] S615. In response to a click operation on the start measurement control 5, the smart watch displays an interface 9, which includes a prompt message 13, a confirmation control, and a rejection control. The prompt message 13 indicates whether the wearing is too tight.

[0304] The confirmation control indicates that the wear is too tight. The confirmation control is used to trigger the smart watch to end the measurement. The rejection control indicates that the wear is not too tight.

[0305] The rejection control is used to trigger the smartwatch to continue acquiring PPG data and wearing pressure.

[0306] S616: In response to the click operation on the reject control, the smart watch returns to the above S604.

[0307] For example, after measuring the wearing pressure 4 and PPG data 4 when the number of holes of the currently buckled watchband is 4, the smart watch tightens the watchband by one notch. After the wearer clicks the confirmation control, indicating that the wearer has tightened the watchband by one notch, the smart watch continues to measure the wearing pressure 4 and PPG data 4 when the number of holes of the currently buckled watchband is 3 in response to the click operation of the confirmation control.

[0308] S617. In response to a click operation on the confirmation control, the smart watch generates a mapping curve 3 between signal quality and wearing pressure based on the wearing pressure 6 corresponding to the number of each strap hole and the signal quality 6 corresponding to the number of each strap hole that have been measured.

[0309] S618 . The smart watch uses the wearing pressure corresponding to the signal quality on mapping curve 3 that is greater than or equal to quality threshold 7 as the target wearing pressure corresponding to measurement mode 3 .

[0310] S619. The smart watch outputs the number of strap holes corresponding to the target wearing pressure.

[0311] S620. The smart watch calculates the physiological parameter 2 corresponding to the measurement mode 3 based on the PPG data 6 corresponding to the target wearing pressure.

[0312] S621 . The smart watch displays an interface 10 , which includes physiological parameters 3 .

[0313] Exemplarily, the above interface 10 may also include exercise time and / or exercise calories, etc.

[0314] Among them, the determination of the target wearing pressure and the measurement of physiological parameters in the sports scene can refer to the determination of the target wearing pressure and the measurement of physiological parameters in the above-mentioned static scene.

[0315] In some embodiments, it is described above that different measurement modes have corresponding target wearing pressures. Of course, the measurement modes in the static state can be set to the same target wearing pressure. After measuring a measurement mode in the static state, when the wearer triggers another measurement mode in the static state, the wearer can be directly prompted to adjust the wearing pressure to the target wearing pressure. For example, the above-mentioned measurement mode 2 is different from the above-mentioned measurement mode 1. After determining the target wearing pressure corresponding to measurement mode 1, when the wearer enters the above-mentioned operation 2, the smart watch can directly prompt to adjust the wearing pressure to the target wearing pressure (such as prompting the wearer to buckle the watch to the number of watch strap buckles corresponding to the target wearing pressure).

[0316] Alternatively, the target wearing pressures corresponding to the various measurement modes are the same. For example, the target wearing pressures corresponding to the measurement mode in the static state and the movement mode are the same.

[0317] In some embodiments, after obtaining the physiological parameters, the smart watch can save the physiological parameters locally on the smart watch through the communication module, or send them to other devices. Fig.25 As shown, the smart watch sends the blood pressure to the mobile phone through the communication module in the smart watch. After that, the communication module in the mobile phone can send the blood pressure to the control module in the mobile phone after receiving the blood pressure. After that, the control module can save the blood pressure to the storage module in the mobile phone and / or display the blood pressure through the display module. The mobile phone can also include other modules, such as Fig.25 The touch module shown.

[0318] The above describes the process of determining the target wearing pressure suitable for the wearer by the smart watch and the process of measuring the physiological parameters. The following will continue to introduce the possible structural design of the above smart watch.

[0319] In some embodiments, the PPG module can be integrated with the pressure sensor on a PCB circuit board. The PPG module can include at least one PD and at least one group of LEDs. The PD and the LED have optical windows, and the light emitted by the LED can pass through the optical window and enter the wearer's skin. After the light enters the skin and is scattered, part of it is reflected out of the skin, and the reflected light enters the PD optical window and is received by the PD to form an electrical signal to obtain a PPG signal.

[0320] Among them, optionally, each group of LEDs may include three types of light sources: green light, red light, and infrared light, or each group of LEDs may include at least one LED capable of emitting three-color combinations of red light, green light, and infrared light. Of course, the present application does not limit the wavelength range of light emitted by the LED, and the wavelength range for collecting PPG signals may include a visible light wavelength range and an invisible light wavelength range. In addition, the present application does not limit the number of light sources included in each group of LEDs.

[0321] The optical window may be a transparent window. The material of the optical window may include, but is not limited to, optically transparent materials such as PC, PMMA, glass, and sapphire. Alternatively, for invisible light (such as near-infrared light), a non-transparent optical material that can transmit invisible light may also be used. For example, if the light emitted by an LED includes near-infrared light, the material of the optical window may be a non-transparent optical material that can transmit near-infrared light.

[0322] The number and position of the PD, LED and pressure sensor on the PCB can be flexibly set. The following will introduce the possible positions and numbers of the PD, LED and pressure sensor in combination with several possible examples.

[0323] In one example, if Fig.26 or Fig. 27 As shown, the number of the above-mentioned photodiodes (i.e., PDs) can be 3, the number of light-emitting diodes (i.e., LEDs) can be the same as the photodiodes, which is also 3 groups, and the number of pressure sensors is 1. The LEDs and PDs are arranged alternately, forming a circle. The pressure sensor can be located in the middle of the circle, such as the center. Optionally, the LEDs and PDs can be arranged alternately. Fig. 27 The structure shown can be Fig.26 A portion of the structure is shown.

[0324] like Fig.28 As shown, a soft material piece is arranged above the pressure sensor, and the back shell of the watch body (or called the bottom shell of the watch body) is provided with an opening, and the soft material piece passes through the opening. When the wearer wears the smart watch, the back shell of the watch body contacts the wearer's skin to generate pressure, and the pressure is transmitted to the pressure sensor through the soft material piece, so that the pressure sensor obtains the current wearing pressure. In one case, the first surface of the back shell of the watch body is convex, and the first surface contacts the wearer's skin, and the opening is located at the center of the first surface (i.e., the center of the protrusion). Accordingly, the pressure sensor can be located below the center, so that the pressure generated when the back shell of the watch body contacts the wearer's skin can be effectively transmitted to the pressure sensor through the soft material piece, thereby ensuring the accuracy of the pressure detected by the pressure sensor.

[0325] In another case, the first surface (i.e., the outer surface) of the watch body rear shell is flat, and the software material piece can be appropriately higher than the first surface, so that the pressure generated when the watch body rear shell contacts the wearer's skin can be effectively transmitted to the pressure sensor through the software material piece, thereby ensuring the accuracy of the pressure detected by the pressure sensor. The height difference between the software material piece and the first surface can be set according to actual conditions, and this application does not limit it.

[0326] Among them, optionally, the material of the above-mentioned soft material piece refers to a material that can transmit force, for example, the material of the soft material piece can be flexible resin, rubber, silicone, etc.

[0327] Optionally, as above Fig.28 As shown, a light-blocking wall may be provided between the photodiode and the light-emitting diode to prevent the light emitted by the LED from being directly detected by the PD and affecting the detection of physiological parameters.

[0328] In this example, the pressure sensor is located at the center of the PPG module arranged in a circle, which can ensure the accuracy of the pressure value determination, thereby ensuring the accuracy of the target wearing pressure determination, and can reduce costs.

[0329] In addition, in this example, the number of the pressure sensor, LED and PD is only an example. The number of the pressure sensor, LED and PD can also be other numbers, which are not limited by the present application, as long as they are all greater than 1.

[0330] In another example, Fig.29 As shown, the number of the above-mentioned pressure sensors can be 3, the number of light-emitting diodes can be 3 groups, and the number of photodiodes can be 1. The pressure sensors are distributed on the PCB in a circular array, and the LEDs are also distributed on the PCB in a circular array. The pressure sensors and LEDs are located on the same circumference and arranged at intervals. The PD device is placed at the center of the circumference. Correspondingly, three openings are provided on the back shell of the watch body, and a soft material piece is placed above each pressure sensor, and the soft material piece corresponds to the opening one by one, and each soft material piece passes through the corresponding opening. When the wearer wears the smart watch, the three pressure sensors can detect the pressure value respectively. The smart watch can determine whether the pressure on the smart watch is balanced according to the distribution of the pressure value, and determine whether the smart watch is worn abnormally (such as distortion), so as to output corresponding prompt information, ensure the wearing accuracy, and thus improve the measurement accuracy. Exemplarily, the smart watch calculates the difference between the pressure values. In the case where the difference is less than the preset difference 1, it indicates that the pressure on the smart watch is uneven, and the smart watch can output corresponding prompt information, which prompts you to wear the smart watch correctly.

[0331] Optionally, the pressure sensors and LEDs may be spaced apart and arranged alternately.

[0332] In addition, the above-mentioned pressure sensor and LED are arranged at intervals and located on the same circumference, which is only an example. The LED can also be located on the outside of the pressure sensor, or the LED can be located on the inside of the pressure sensor.

[0333] It should be noted that, in this example, the number of the pressure sensor, LED and PD is only an example, and the number of the pressure sensor, LED and PD may also be other numbers, which is not limited in the present application.

[0334] In another example, Fig.30 As shown, the number of the pressure sensors can be 6, the number of light emitting diodes can be 3 groups, and the number of PDs can be 4. The 6 pressure sensors are distributed on the PCB in a circular array, and the 3 PDs and the 3 groups of LEDs are located on the same circumference and arranged at intervals. The pressure sensor is located outside the LEDs and PDs.

[0335] Optionally, the inner part of the circle where the PDs and LEDs are distributed (as described above) Fig.30 A PD may also be provided at the center of the circle shown in the figure to better receive the reflected light.

[0336] Correspondingly, six openings are arranged on the rear shell of the watch body, a soft material piece is placed above each pressure sensor, the soft material pieces correspond to the openings one by one, and each soft material piece passes through the corresponding opening.

[0337] Optionally, PDs and LEDs may be spaced apart and arranged alternately.

[0338] It should be noted that in this example, the number of the pressure sensor, LED and PD is only an example. The pressure sensor, LED and PD may also be other numbers, which are not limited in this application, as long as they are all greater than 1. In addition, the pressure sensor is located outside the LED and PD is only an example, and the LED may also be located inside the LED and PD.

[0339] In this example, the pressure sensor is located outside the measurement area of ​​the PPG module, and the PPG module is located in the inner circle. The number of PDs and LEDs in the PPG module is not limited. The outer space is large, and the pressure sensor is more convenient to arrange. When there are multiple pressure sensors, it can effectively measure whether the smart watch is under balanced pressure. In addition, the position of the center of the circle can realize effective measurement of data. Therefore, the device in the PPG module, such as the above-mentioned PD, can be placed at the center of the circle.

[0340] In another example, Fig.31 As shown, the number of the pressure sensor can be 1, the number of light emitting diodes can be 4 groups, and the number of photodiodes can be 4. The 4 PDs and 4 groups of LEDs are located on the same circumference and arranged at intervals. The pressure sensor can be located at the center of the circumference.

[0341] A soft material piece is arranged above the pressure sensor, and an opening is arranged on the rear shell of the meter body, through which the soft material piece passes.

[0342] It should be understood that the location of the pressure sensor at the center of the circle is only an example, and the pressure sensor may be located at other locations on the circle, which is not limited in the present application.

[0343] In this example, compared to Fig. 27 The number of LEDs and PDs shown increases the number of PPG signal channels by setting more LEDs, and by setting more PDs, the PDs can collect more PPG signals in the same optical path, thereby improving the collection quality of the PPG signal.

[0344] Optionally, PDs and LEDs may be spaced apart and arranged alternately.

[0345] It should be noted that the above Figure 26-Figure 31 The number and distribution position of the LED, PD and pressure sensor shown are only examples, and the positions and numbers of the three can be interchanged, and the present application does not limit them. In addition, the circumference described above is only an example, and it only needs to be distributed in a circumferential form.

[0346] In one of the above embodiments, the pressure sensors are all connected to the pressure sensors through the soft material parts located at the pressure sensors to achieve mechanical transmission. Therefore, it is necessary to install a structural part that is bonded to the soft material parts passing through the opening after the opening is opened on the back shell of the watch body of the smart watch, or to connect the soft material parts passing through the opening with the back shell of the watch body through an integrated injection molding process to achieve the fixation of the soft material parts and ensure that the waterproof function of the smart watch is not affected. It can be seen that the design method of this embodiment has high requirements on the structural design of the smart watch. Therefore, the pressure sensor can be directly set under the back shell of the watch body. When the back shell of the watch body contacts the wearer's skin, the pressure sensor can detect the wearing pressure through the strain of the back shell of the watch body. Two possible design methods of setting the pressure sensor on the back shell of the watch body are introduced below.

[0347] In one possible design, Fig.32 As shown, the photodiode and the light emitting diode can be arranged on a printed circuit board, and the pressure sensor is arranged on the second surface of the rear shell of the watch body, the second surface and the first surface are two different surfaces of the rear shell of the watch body, the second surface is the inner surface of the rear shell of the watch body, and the first surface is the outer surface of the rear shell of the watch body. The first surface contacts the skin of the wearer. The pressure sensor can be electrically connected to the printed circuit board.

[0348] Exemplarily, the rear shell of the watch body includes a lens (or PPG lens). The pressure sensor and the lens of the rear shell of the watch body can be bonded by colloid, which can sense the strain of the rear shell of the watch body and identify the pressure value.

[0349] Optionally, as above Fig.32 As shown, the pressure sensor is connected to the printed circuit board through a flexible printed circuit (FPC).

[0350] Optionally, as above Fig.32 As shown, optionally, as described above Fig.32As shown, the rear shell of the watch body may further include a frame and a lens. The pressure sensor may be located on the inner side of the connection between the frame and the lens. For example, the distance between the pressure sensor and the connection is less than the set distance. When the lens is strained, the degree of strain at the connection between the frame and the lens is greater than that at other positions on the lens. Therefore, when the pressure sensor is installed near the connection, it can effectively sense the strain of the PPG lens and ensure the accuracy of wearing pressure detection.

[0351] Wherein, optionally, as described above Fig.32 As shown, the above-mentioned lens can be located on the step groove of the frame.

[0352] In another possible design, the pressure sensor is a thin film pressure sensor. Fig.33 As shown, the photodiode and the light emitting diode can be arranged on a printed circuit board, and the thin film pressure sensor is arranged on the second surface of the rear shell of the watch body. The second surface and the first surface are two different surfaces of the rear shell of the watch body, the second surface is the inner side of the rear shell of the watch body, and the first surface is the outer side of the rear shell of the watch body. The first surface contacts the skin of the wearer. The thin film pressure sensor can be electrically connected to the printed circuit board.

[0353] The thin film pressure sensor is located above the photodiode and the light emitting diode. In order to reduce the influence of the thin film pressure sensor on the optical signal receiving and transmitting function of the PPG module, the thin film pressure sensor can be made of a fully transparent material.

[0354] Alternatively, the thin film pressure sensor can adopt a customized window design, where the position on the thin film pressure sensor located above the PPG module is an open design, but the process requirements are higher.

[0355] Optionally, the above-mentioned lens (or PPG lens) is only a possible design of the back cover, and the back cover may also be made of other transparent materials.

[0356] In some embodiments, the present application provides a computer storage medium including computer instructions. When the computer instructions are executed on a wearable device, the wearable device executes the method described above.

[0357] In some embodiments, the present application provides a computer program product, which, when executed on a wearable device, enables the wearable device to execute the method described above.

[0358] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0359] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0360] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0361] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0362] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0363] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A wearable device, characterized in that: The wearable device comprises a watch body and a watch strap connected to each other, wherein the watch body comprises a photoplethysmography (PPG) module, a pressure sensor, a soft material part and a circuit board; The PPG module and the pressure sensor are electrically connected to the circuit board respectively; The pressure sensor is located in the watch body shell, the soft material piece is in contact with the pressure sensor, and the watch body shell is provided with a plurality of openings; wherein the number of the soft material piece and the pressure sensor is multiple, the soft material piece is placed above each pressure sensor, the soft material piece corresponds to the opening one by one, and each soft material piece passes through the corresponding opening; the soft material piece is used to transmit the pressure generated when the shell contacts the wearer's skin to the pressure sensor in contact with the soft material piece; The end surface of the soft material piece facing away from the pressure sensor protrudes from the outer surface of the housing; Wherein, the PPG module includes a light emitting diode LED and a photodiode PD, and a light blocking wall is arranged between the LED and the PD, and the light blocking wall is used to prevent the light emitted by the LED from being detected by the PD; The wearable device is used to determine whether the wearable device is under balanced pressure and whether the wearable device is worn abnormally according to the distribution of pressure values ​​detected by the pressure sensor, thereby outputting corresponding prompt information.

2. The wearable device according to claim 1, characterized in that: A plurality of first devices and a plurality of second devices are arranged at intervals in a circumferential direction of the third device; The first device is a pressure sensor, the second device is an LED, and the third device is a PD; Alternatively, the first device is a pressure sensor, the second device is a PD, and the third device is an LED.

3. The wearable device according to claim 2, characterized in that: The plurality of first components and the plurality of second components are spaced apart and alternately arranged in a circumferential direction of the third component.

4. The wearable device according to claim 1, characterized in that: A plurality of first components are arranged at intervals in the circumferential direction of the watch body; A plurality of second components and a plurality of third components are arranged at intervals in the circumferential direction of the watch body, and the plurality of second components and the plurality of third components are located on the circumferential inner side of the plurality of first components; Wherein, the first device is an LED, the second device is a PD, and the third device is a pressure sensor; Alternatively, the first device is a pressure sensor, the second device is an LED, and the third device is a PD; Alternatively, the first device is a pressure sensor, the second device is a PD, and the third device is an LED.

5. The wearable device according to claim 4, characterized in that: A first space is defined between the plurality of second components and the plurality of third components, and at least one fourth component is disposed in the first space; the fourth component is the first component, the second component or the third component.

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