Sensor Contact Pressure Determination Method, Device, Equipment and Storage Medium

Abstract

An embodiment of the present invention discloses a method, device, equipment and storage medium for determining the contact pressure of a sensor. The method includes acquiring a reflected light signal collected by the sensor and corresponding time information; calculating a slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information; and determining the contact pressure information of the sensor according to the magnitude of the slope. In this solution, without additional hardware settings, the pressure condition when the sensor contacts the human body can be determined, which has strong usability and reduces the total product cost.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of computer technology, and in particular, to a method, device, equipment, and storage medium for determining the contact pressure of a sensor. Background Art

[0002] With the popularization of electronic devices, their functions have become increasingly rich. Electronic devices can collect more complex information by integrating sensors for relevant parameters and provide it to users. For the measurement of parameters such as heart rate, blood oxygen, blood pressure, and respiratory rate, it can be achieved based on photoelectric sensors using photoplethysmography. Photoplethysmography is a technology for measuring human pulse waves using photoelectric signals.

[0003] During the process of measurement using a photoelectric sensor, since the force relationship between the sensor and the human skin has a great influence on the collected signal, especially for the reflective sensor commonly used in wearable devices that requires finger pressing for collection. When the finger pressing force is too large, the blood vessels are squeezed and deformed, resulting in distortion of the measured pulse wave signal and affecting the measurement result. In related technologies, a finger clip method is adopted, and the contact force between the finger and the sensor is controlled by a spring built into the finger clip. However, for wearable devices such as watches and bracelets, the sensor in the form of a finger clip is too large in volume, affecting the product experience. Or, an internal pressure sensor is used to detect the force relationship between the finger and the contact surface of the device during the measurement process to feedback and remind the user to adjust the pressing force. However, since the outer shell of wearable devices usually uses metal or relatively hard plastic materials, the deformation caused by the user's pressing is slight, so a very precise pressure sensor is required, thus increasing the product cost. Summary of the Invention

[0004] Embodiments of the present invention provide a method, device, equipment, and storage medium for determining the contact pressure of a sensor, which can determine the pressure situation when the sensor contacts the human body without additional hardware settings, has strong usability, and reduces the total product cost.

[0005] In a first aspect, embodiments of the present invention provide a method for determining the contact pressure of a sensor, the method comprising:

[0006] Obtain the reflected light signal collected by the sensor and the corresponding time information;

[0007] Calculate the slope of the change in the intensity of the reflected light signal over time according to the amplitude value of the reflected light signal and the corresponding time information;

[0008] Determine the contact pressure information of the sensor according to the magnitude of the slope.

[0009] Second aspect, an embodiment of the present invention further provides a sensor contact pressure determination device, which includes:

[0010] A data acquisition module, configured to acquire the reflected light signal collected by the sensor and the corresponding time information;

[0011] A slope determination module, configured to calculate the slope of the change of the intensity of the reflected light signal with time according to the amplitude value of the reflected light signal and the corresponding time information;

[0012] A pressure information generation module, configured to determine the contact pressure information of the sensor according to the magnitude of the slope.

[0013] Third aspect, an embodiment of the present invention further provides a sensor contact pressure determination device, which includes:

[0014] One or more processors;

[0015] A storage device for storing one or more programs,

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement the sensor contact pressure determination method according to the embodiment of the present invention.

[0017] Fourth aspect, an embodiment of the present invention further provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute the sensor contact pressure determination method according to the embodiment of the present invention when executed by a computer processor.

[0018] In the embodiment of the present invention, the reflected light signal collected by the sensor and the corresponding time information are acquired, the slope of the change of the intensity of the reflected light signal with time is calculated according to the amplitude value of the reflected light signal and the corresponding time information, and then the contact pressure information of the sensor is determined according to the magnitude of the slope. In this solution, without additional hardware settings, the pressure condition when the sensor contacts the human body is determined, which has strong usability and reduces the total product cost. Description of the Drawings

[0019] Figure 1 Is a flowchart of a sensor contact pressure determination method provided by an embodiment of the present invention;

[0020] Figure 2 Is a flowchart of a method for determining contact pressure information according to a green light signal provided by an embodiment of the present invention;

[0021] Figure 3 Is a flowchart of a method for determining contact pressure information according to a red light signal and infrared light provided by an embodiment of the present invention;

[0022] Figure 4 Flow chart of a method for determining contact pressure information based on three optical signals provided by an embodiment of the present invention;

[0023] Figure 5 Flow chart of a method for parameter determination by a sensor provided by an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of a slope determined based on the reflected light signal of green light provided by an embodiment of the present invention;

[0025] Figure 7 Schematic diagram of a slope determined based on the reflected light signal of red light provided by an embodiment of the present invention;

[0026] Figure 8 Schematic diagram of a slope determined based on the reflected light signal of infrared light provided by an embodiment of the present invention;

[0027] Figure 9 Structural block diagram of a sensor contact pressure determination device provided by an embodiment of the present invention;

[0028] Figure 10 Structural schematic diagram of a device provided by an embodiment of the present invention. Detailed implementation manners

[0029] The following further elaborates on the embodiments of the present invention in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the embodiments of the present invention, rather than limiting the embodiments of the present invention. Additionally, it should be noted that for the sake of description, only parts related to the embodiments of the present invention rather than all structures are shown in the accompanying drawings.

[0030] Figure 1 Flow chart of a method for determining sensor contact pressure provided by an embodiment of the present invention. This embodiment is applicable to determining the contact pressure of a sensor and can be executed by an intelligent device integrated with a sensor, such as a smartwatch, smartphone, tablet computer, smart glasses, smart bracelet, etc. The specific steps are as follows:

[0031] Step S101: Obtain the reflected light signal collected by the sensor and the corresponding time information.

[0032] In one embodiment, the intelligent device is integrated with a sensor that can be used to detect human parameters such as the user's heart rate, blood oxygen, blood pressure, and respiratory rate. Exemplarily, the user can press the surface of the sensor with a hand or other limb to measure human parameters. During use, insufficient or excessive pressing force will significantly reduce the reliability of the measurement results. Therefore, it is necessary to determine the sensor contact pressure.

[0033] Among them, when determining the contact pressure information, first obtain the reflected light signal collected by the sensor and the corresponding time information. Among them, taking the sensor as a photoelectric sensor and using the photoplethysmography method as the measurement method, the sensor is integrated with an LED light source, and the reflected light signal can be collected through the used reflected light signal receiving module. Among them, this time information is the time corresponding to the collection of the reflected light signal, which can specifically be a moment or a sequence associated with the moment, and it is used to characterize the time relationship before and after the collection of the reflected light signal.

[0034] Step S102: Calculate the slope of the change of the intensity of the reflected light signal with time according to the amplitude value of the reflected light signal and the corresponding time information.

[0035] In one embodiment, after obtaining the reflected light signals at different moments, calculate the slope of the change of the intensity of the reflected light signal with time. Optionally, taking the horizontal axis of the coordinate as the sampling point number corresponding to time and the vertical axis as the amplitude value of the reflected signal as an example, calculate the slope of the curve. Optionally, the calculation method of the slope can be to calculate the slope of the change of the intensity of the reflected light signal with time according to the amplitude value of the reflected light signal and the corresponding time information through the least squares method. Exemplarily, taking the value of the horizontal axis x to represent the time information corresponding to the process of collecting the reflected signal and the value of the vertical axis y to represent the amplitude value of the reflected signal, the slope calculation method is:

[0036]

[0037] Among them, are the average values of the variables x and y respectively. Optionally, the values of x and y are all the data within a continuous period of time after the sensor starts to collect valid information, such as the data within a time range of 5 seconds or 10 seconds. Of course, the above-mentioned least squares method is used to perform curve fitting to obtain the corresponding slope. In the specific calculation process, other algorithms can also be used for calculation.

[0038] Step S103: Determine the contact pressure information of the sensor according to the magnitude of the slope.

[0039] In one embodiment, after calculating the slope, determine the contact pressure information of the sensor based on the magnitude of the slope. Among them, different slope values reflect different degrees of sensor contact pressure.

[0040] Among them, for the human skin tissue, light of different wavelengths has different detection depths. Taking the green light (central wavelength 530nm), red light (central wavelength 655nm), and infrared light (central wavelength 940nm) commonly used in photoelectric sensors as examples. The green light can only detect the skin surface layer. Due to the transmission of the pulse wave in the arterial blood vessels, it causes slight fluctuations in the skin tissue, resulting in a change in the position of the blood in the skin surface layer relative to the sensor, thereby causing a change in the reflected signal received by the sensor. The detection depths of the red light and the infrared light are relatively deep, and the signals they emit can detect the change in the blood volume in the blood vessels in the deep layer of the skin. When there is a slight contact between the skin and the sensor surface, the blood flow in the skin surface layer is hardly affected. The sensor using the green light source can detect the change in the position of the blood in the shallow layer of the skin caused by the pulse wave relative to the sensor. Therefore, the signal baseline measured by the sensor is relatively stable. The blood vessels in the deep layer of the skin are not affected by external forces either, and the pulse wave is transmitted normally. The reflected signal baselines of the red light and the infrared light detected by the receiving part of the sensor are also relatively stable. When the contact force between the skin and the sensor surface is greater than 150g, the blood in the skin surface layer is squeezed and flows back, resulting in local ischemia and whitening of the skin at the stressed position. Less green light is absorbed after entering the skin, and the reflection increases. Moreover, as time goes by, the blood volume in the skin surface layer becomes less and less, and the absorption of green light becomes less and less. Therefore, the AC amplitude of the green light reflected signal received by the sensor becomes smaller and smaller, the signal baseline drifts upward, and the slope increases. For the red light and infrared reflected signals, since less blood is absorbed in the skin surface layer, the blood vessels in the deep layer of the skin receive more red light and infrared energy, and the absorption increases, thereby reducing the energy of the red light and infrared light reflected back to the sensor receiving module, and the signal baseline drifts downward, and the slope becomes negative. For different pressing forces, the slopes of the baseline changes of the different reflected signals of the green light, red light, and infrared light of the sensor are different. Therefore, by calculating the slope value, the contact force between the sensor and the skin can be judged.

[0041] In one embodiment, through testing and quantitative analysis, the relationship between the slope corresponding to the reflected signal of different light sources and the contact pressure can be recorded, that is, the corresponding pressure value is obtained according to the specific different slope values as the contact pressure information. In another embodiment, the contact pressure information may be information reflecting the contact force situation, such as light contact force, moderate contact force, and excessive contact force, etc.

[0042] As can be seen from the above solution, by obtaining the reflected light signal collected by the sensor and the corresponding time information, calculating the slope of the change in the intensity of the reflected light signal over time based on the amplitude value of the reflected light signal and the corresponding time information, and then determining the contact pressure information of the sensor according to the magnitude of the slope. In this solution, by calculating the slope value of the reflected light signal, the pressure condition when the sensor contacts the human body can be determined without additional hardware settings, which has strong usability and reduces the total cost of the product.

[0043] Figure 2 It is a flowchart of a method for determining contact pressure information according to a green light signal provided by an embodiment of the present invention. As Figure 2 shown, it specifically includes:

[0044] Step S201, obtain the green light reflection signal collected by the sensor and the corresponding time information.

[0045] Step S202, calculate the green light slope of the change in the intensity of the green light reflection signal over time according to the amplitude value of the green light reflection signal and the corresponding time information.

[0046] Step S203, when the green light slope is less than or equal to 0, determine that the contact pressure information is the first preset information, and when the green light slope is greater than 0, determine that the contact pressure information is the second preset information.

[0047] In one embodiment, the green light slope is calculated with the green light source integrated in the sensor as the processing object, and the contact pressure information is determined based on this green light slope. Based on the foregoing principle analysis, here when the calculated value of the green light slope is less than or equal to 0, the first preset information is used as the contact pressure information, and the first preset information can optionally be that the contact force is moderate; when the green light slope is greater than 0, the second preset information is used as the contact pressure information, and the second preset information can optionally be that the contact force is too large.

[0048] As can be seen from the above, by calculating the slope using the green light signal to determine the magnitude of the contact force between the user and the sensor, the pressure condition when the sensor contacts the human body can be determined without additional hardware settings, which has strong usability and reduces the total cost of the product.

[0049] Figure 3 It is a flowchart of a method for determining contact pressure information according to a red light signal and an infrared light provided by an embodiment of the present invention. As Figure 3 shown, it specifically includes:

[0050] Step S301, obtain the red light reflection signal and the infrared light reflection signal collected by the sensor and the corresponding time information.

[0051] Step S302: Calculate the red light slope and the infrared light slope of the intensity of the red light reflection signal and the infrared light reflection signal changing with time according to the amplitude values of the red light reflection signal and the infrared light reflection signal and the corresponding time information.

[0052] Step S303: when the red light slope and the infrared light slope are both less than or equal to 0, determining that the contact pressure information is the first preset information; otherwise, determining that the contact pressure information is the second preset information.

[0053] In one embodiment, the red light source and the infrared light source integrated by the sensor are used as processing objects to calculate the red light slope and the infrared light slope, and the contact pressure information is determined based on the red light slope and the infrared light slope. Based on the above principle analysis, when the red light slope and the infrared light slope are both less than or equal to 0, the contact pressure information is determined to be the first preset information, and the first preset information can be a moderate contact force; if the red light slope or the infrared light slope is greater than 0, the second preset information is used as the contact pressure information, and the second preset information can be a large contact force.

[0054] From the above, it can be seen that by using red light signals and infrared light signals to calculate the slope and then determine the size of the contact force between the user and the sensor, the pressure situation when the sensor and the human body are in contact can be determined without the need for additional hardware settings, which has strong usability and reduces the total cost of the product.

[0055] Figure 4 A flow chart of a method for determining contact pressure information according to three optical signals provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, specifically including:

[0056] Step S401: Acquire a green light reflection signal, a red light reflection signal and an infrared light reflection signal collected by a sensor, and corresponding time information.

[0057] Step S402: Calculate the slopes of the intensity changes of the three reflected light signals over time according to the amplitude values of the green light reflected signal, the red light reflected signal and the infrared light reflected signal and the corresponding time information.

[0058] Step S403: when the green light slope is greater than 0, and the red light slope and the infrared light slope are both less than or equal to 0, the contact pressure information is determined to be the first preset information; when the infrared slope is greater than 0, the contact pressure information is determined to be the second preset information; when the green light slope, the red light slope and the infrared light slope are all less than or equal to 0, the contact pressure information is determined to be the third preset information.

[0059] In one embodiment, the green light slope, the red light slope and the infrared light slope are calculated by taking the three light sources integrated by the sensor as processing objects, and the contact pressure information is determined based on the green light slope, the red light slope and the infrared light slope.

[0060] Specifically, when the green light slope is greater than 0, and the red light slope and the infrared light slope are both less than or equal to 0, the contact pressure information is determined to be the first preset information, and the first preset information may be that the contact force is moderate; when the infrared slope is greater than 0, the contact pressure information is determined to be the second preset information, and the second preset information may be that the contact force is relatively large; when the green light slope, the red light slope, and the infrared light slope are all less than or equal to 0, the contact pressure information is determined to be the third preset information, and the third preset information may be that the contact force is relatively small.

[0061] From the above, it can be seen that by using green light signals, red light signals and infrared light signals to calculate the slope and then determine the size of the contact force between the user and the sensor, the pressure situation when the sensor and the human body are in contact can be determined without additional hardware settings, which has strong usability and reduces the total cost of the product. At the same time, the pressure information provided has more dimensions and the information is more accurate and comprehensive.

[0062] Figure 5 A flow chart of a method for determining parameters by using a sensor provided by an embodiment of the present invention, such as Figure 5 As shown, specifically including:

[0063] Step S501: determine the function parameters used for calculation by the sensor, and obtain the reflected light signal of the corresponding light source type and the corresponding time information according to the function parameters.

[0064] For example, a sensor used to measure changes in human pulse waves can be used to calculate different functional parameters, such as heart rate, heart rate variability, and respiratory rate; or blood oxygen concentration information or blood pressure information. Different functional parameters have different requirements for pulse wave signals.

[0065] In one embodiment, the contact pressure information is determined using reflected signals of different light source types according to different calculated functional parameters. Optionally, when calculating heart rate, heart rate variability, and respiratory rate, a green light signal is used. When pulse wave measurement is only used to calculate parameters such as heart rate, heart rate variability, and respiratory rate, for the pulse wave signal, it is only necessary to extract the signal peak to calculate the required parameters. Therefore, in terms of the pressure requirement, it is only necessary to avoid excessive pressure causing severe distortion of the waveform.

[0066] When calculating the blood oxygen concentration information, for the pulse wave signal, it is necessary to ensure that the amplitude information of the red light signal and the infrared signal is relatively accurate. Therefore, it is necessary to determine whether the pressing force causes the amplitude distortion of the red light measurement signal and the infrared measurement signal. At this time, the red light signal and the infrared light signal are used.

[0067] In the case of calculating blood pressure and other conditions that require the characteristics of the dicrotic wave signal, it is necessary to be able to accurately obtain the position and amplitude of the dicrotic wave signal, so it is necessary to control the pressing force within an appropriate range, which is generally between 150g and 180g after experimental measurement. If the pressing force is too small, the superficial reflection signal of the skin is superimposed, resulting in an unclear dicrotic wave. When the pressing force is too large, the elasticity of the blood vessels is blocked, resulting in signal distortion. Therefore, three signals, green light, red light and infrared light, are used to determine the contact pressure information.

[0068] Step S502: Calculate the slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information.

[0069] Step S503: Determine contact pressure information of the sensor according to the slope.

[0070] Among them, when green light, red light, infrared light, and green light, red light, infrared light are used to determine the contact pressure information respectively, the specific method of determining the contact pressure information according to the slope is shown in the above example and will not be repeated here.

[0071] Step S504: Prompt information according to the contact pressure information to indicate maintaining or adjusting the contact force on the sensor.

[0072] In one embodiment, after the contact pressure information is determined, an information prompt is given according to the contact pressure information. For example, when the contact pressure information is the first preset information, that is, the pressure is moderate, no reminder may be given or a sound prompt may be given, and an exemplary prompt tone may be "please continue to hold"; when the contact pressure information is the second preset information, that is, the pressure is too high, a sound prompt or a vibration prompt may be given, and an exemplary prompt tone may be "please reduce the pressing force"; when the contact pressure information is the third preset information, that is, the pressure is too low, a sound prompt may be given, and an exemplary prompt tone may be "please increase the pressing force".

[0073] Figure 6 A schematic diagram of a slope determined based on a reflected light signal of green light provided in an embodiment of the present invention. Figure 7 A schematic diagram of a slope determined based on a reflected light signal of red light provided in an embodiment of the present invention. Figure 8 A schematic diagram of a slope determined based on a reflected light signal of infrared light provided by an embodiment of the present invention. Figures 6 to 8As shown, the slope of the green light can be obtained as greater than 0, and the slopes of the red light and the infrared light are less than 0. Correspondingly, in this case, the contact force between the finger pulp and the sensor is about 170 g, and its magnitude is relatively moderate. During the process of calculating blood pressure, if the identified slope is as Figures 6 to 8 shown, it indicates that the pressure is moderate in this blood pressure measurement.

[0074] As can be seen from the above, by using the reflected signals of different light sources for different sensor measurement parameters to determine the contact pressure information, it can more precisely adapt to different usage scenarios and be more in line with the actual usage situation.

[0075] Figure 9 The following is a structural block diagram of a sensor contact pressure determination device provided by an embodiment of the present invention. This device is used to execute the sensor contact pressure determination method provided by the above embodiment and has corresponding functional modules and beneficial effects for executing the method. As Figure 9 shown, the device specifically includes: a data acquisition module 101, a slope determination module 102, and a pressure information generation module 103. Among them,

[0076] The data acquisition module 101 is configured to acquire the reflected light signal collected by the sensor and the corresponding time information;

[0077] The slope determination module 102 is configured to calculate the slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information;

[0078] The pressure information generation module 103 is configured to determine the contact pressure information of the sensor according to the magnitude of the slope.

[0079] As can be seen from the above solution, by acquiring the reflected light signal collected by the sensor and the corresponding time information, calculating the slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information, and then determining the contact pressure information of the sensor according to the magnitude of the slope. This solution can determine the pressure situation when the sensor contacts the human body without additional hardware settings, has strong usability, and reduces the total cost of the product.

[0080] In a possible embodiment, the slope determination module 102 is configured to:

[0081] Calculate the slope of the intensity of the reflected light signal changing with time by the least squares method according to the amplitude value of the reflected light signal and the corresponding time information.

[0082] In a possible embodiment, the reflected optical signal includes a green light reflected signal, and the slope of the intensity of the reflected optical signal changing with time includes a green light slope. The pressure information generation module 103 is configured to:

[0083] When the green light slope is less than or equal to 0, determine that the contact pressure information is first preset information;

[0084] When the green light slope is greater than 0, determine that the touch pressure information is second preset information.

[0085] In a possible embodiment, the reflected optical signal includes a red light reflected signal and an infrared light reflected signal, and the slope of the intensity of the reflected optical signal changing with time includes a red light slope and an infrared light slope. The pressure information generation module 103 is configured to:

[0086] When both the red light slope and the infrared light slope are less than or equal to 0, determine that the contact pressure information is first preset information; otherwise, determine that the contact pressure information is second preset information.

[0087] In a possible embodiment, the reflected optical signal includes a green light reflected signal, a red light reflected signal and an infrared light reflected signal, and the slope of the intensity of the reflected optical signal changing with time includes a green light slope, a red light slope and an infrared light slope. The pressure information generation module 103 is configured to:

[0088] When the green light slope is greater than 0, and both the red light slope and the infrared light slope are less than or equal to 0, determine that the contact pressure information is first preset information;

[0089] When the infrared slope is greater than 0, determine that the contact pressure information is second preset information;

[0090] When the green light slope, the red light slope and the infrared light slope are all less than or equal to 0, determine that the contact pressure information is third preset information.

[0091] In a possible embodiment, the data acquisition module 101 is further configured to:

[0092] Before acquiring the reflected optical signal collected by the sensor, determine the functional parameters used for calculation by the sensor;

[0093] The acquisition of the reflected optical signal collected by the sensor includes:

[0094] Acquire the reflected optical signal of the corresponding light source type according to the functional parameters to determine the contact pressure information.

[0095] In a possible embodiment, the device further includes an information prompt module, configured to:

[0096] After determining the contact pressure information of the sensor according to the magnitude of the slope, information prompting is performed according to the contact pressure information to indicate to maintain or adjust the contact force on the sensor.

[0097] Figure 10 The following is a schematic structural diagram of an equipment electronic tuning identification device provided by an embodiment of the present invention, as Figure 10 shown, the device includes a processor 201 and a memory 202. The number of processors 201 in the device can be one or more, Figure 10 taking one processor 201 as an example; the processor 201 and the memory 202 in the device can be connected through a bus or other means, Figure 10 taking connection through a bus as an example. The memory 202, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the sensor contact pressure determination method in the embodiment of the present invention. The processor 201 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory 202, that is, implementing the above-mentioned sensor contact pressure determination method.

[0098] The embodiment of the present invention further provides a storage medium containing computer-executable instructions, which can be stored in the form of a server application. The computer-executable instructions are used to execute a sensor contact pressure determination method when executed by a computer processor. The method includes:

[0099] Obtain the reflected light signal collected by the sensor and the corresponding time information;

[0100] Calculate the slope of the change in the intensity of the reflected light signal over time according to the amplitude value of the reflected light signal and the corresponding time information;

[0101] Determine the contact pressure information of the sensor according to the magnitude of the slope.

[0102] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0103] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal (which can be a mobile device, mobile phone, computer, server or network device, etc.) to execute the methods described in the various embodiments of the present application.

[0104] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. Method for determining sensor contact pressure, wherein the sensor is used to detect the heart rate, blood oxygen, blood pressure or respiratory rate of a human body, characterized in that, include: Acquire a human body reflected light signal collected by a sensor and corresponding time information, wherein the reflected light signal includes a green light reflected signal; Calculating a slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information, wherein the slope of the intensity of the reflected light signal changing with time includes a green light slope; Determining the contact pressure information of the sensor according to the magnitude of the slope, including: When the green light slope is less than or equal to 0, the contact pressure information is determined to be the first preset information, and when the green light slope is greater than 0, the contact pressure information is determined to be the second preset information. The first preset information is that the contact force is moderate, and the second preset information is that the contact force is too large.

2. The method for determining the sensor contact pressure according to claim 1, wherein The step of calculating the slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information comprises: According to the amplitude value of the reflected light signal and the corresponding time information, the slope of the intensity change of the reflected light signal over time is calculated by the least square method.

3. Method for determining sensor contact pressure, where the sensor is used to detect the heart rate, blood oxygen, blood pressure or respiratory rate of a human body, characterized in that, include: Acquire a human body reflected light signal collected by a sensor and corresponding time information, wherein the reflected light signal includes a red light reflected signal and an infrared light reflected signal; Calculating a slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information, wherein the slope of the intensity of the reflected light signal changing with time includes a red light slope and an infrared light slope; Determining the contact pressure information of the sensor according to the magnitude of the slope, including: When the red light slope and the infrared light slope are both less than or equal to 0, the contact pressure information is determined to be the first preset information, otherwise, the contact pressure information is determined to be the second preset information, the first preset information is that the contact force is moderate, and the second preset information is that the contact force is too large.

4. Method for determining sensor contact pressure, where the sensor is used to detect the heart rate, blood oxygen, blood pressure or respiratory rate of a human body, characterized in that, include: Acquire a human body reflected light signal collected by a sensor and corresponding time information, wherein the reflected light signal includes a green light reflected signal, a red light reflected signal and an infrared light reflected signal; Calculating a slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and the corresponding time information, wherein the slope of the intensity of the reflected light signal changing with time includes a green light slope, a red light slope and an infrared light slope; Determining the contact pressure information of the sensor according to the magnitude of the slope, including: When the green light slope is greater than 0, and the red light slope and the infrared light slope are both less than or equal to 0, the contact pressure information is determined to be the first preset information; when the infrared light slope is greater than 0, the contact pressure information is determined to be the second preset information; when the green light slope, the red light slope and the infrared light slope are all less than or equal to 0, the contact pressure information is determined to be the third preset information; the first preset information is that the contact force is moderate, the second preset information is that the contact force is too large, and the third preset information is that the contact force is too small.

5. The method for determining the sensor contact pressure according to any one of claims 1-4, characterized in that Before acquiring the reflected light signal collected by the sensor, the method further includes: determining a functional parameter for calculation by the sensor; The step of acquiring the reflected light signal collected by the sensor comprises: A reflected light signal corresponding to the light source type is acquired according to the functional parameter to determine contact pressure information.

6. The method for determining the sensor contact pressure according to any one of claims 1-4, characterized in that, After determining the contact pressure information of the sensor according to the size of the slope, the method further includes: An information prompt is provided according to the contact pressure information to indicate maintaining or adjusting the contact force on the sensor.

7. Sensor contact pressure determination device, wherein the sensor is used to detect the heart rate, blood oxygen, blood pressure or respiratory rate of a human body, characterized in that include: A data acquisition module, configured to acquire a human body reflected light signal collected by a sensor and corresponding time information, wherein the reflected light signal includes a green light reflected signal; a slope determination module, configured to calculate a slope of the intensity of the reflected light signal changing with time according to the amplitude value of the reflected light signal and corresponding time information, wherein the slope of the intensity of the reflected light signal changing with time includes a green light slope; A pressure information generating module is configured to determine the contact pressure information of the sensor according to the magnitude of the slope, including: When the green light slope is less than or equal to 0, the contact pressure information is determined to be the first preset information, and when the green light slope is greater than 0, the contact pressure information is determined to be the second preset information. The first preset information is that the contact force is moderate, and the second preset information is that the contact force is too large.

8. A sensor contact pressure determination device, the device comprising: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the sensor contact pressure determination method according to any one of claims 1-6.

9. A storage medium comprising computer executable instructions, which, when executed by a computer processor, are used to perform the sensor contact pressure determination method according to any one of claims 1 to 6.

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