WO2019213874A1

WO2019213874A1 - Blood oxygen saturation measurement method and device, smart wearable device

Info

Publication number: WO2019213874A1
Application number: PCT/CN2018/086189
Authority: WO
Inventors: 王晓虎
Original assignee: 高驰运动科技(深圳)有限公司
Priority date: 2018-05-09
Filing date: 2018-05-09
Publication date: 2019-11-14

Abstract

A blood oxygen saturation measurement method and device, and a smart wearable device (10), the smart wearable device (10) comprising a pressure sensor (200) which is provide on the smart wearable device (10) and can be used for measuring a wearing pressure value of the smart wearable device (10) during wearing. Said measurement method comprises: acquiring, by means of a blood oxygen sensor (100), an initial blood oxygen saturation value corresponding to a detected photoelectric signal (S1); measuring, by means of a pressure sensor (200), a wearing pressure value of the smart wearable device (10) during wearing, and using same as a target pressure value (S2); and performing filtering processing on the initial blood oxygen saturation value according to a preset pressure calibration data model and the target pressure value, so as to obtain a corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value (S3). The present invention improves the accuracy of blood oxygen saturation measurement based on the smart wearable device (10).

Description

Method and device for detecting blood oxygen saturation, intelligent wearable device

Technical field

The present invention relates to the field of medical monitoring technology and the field of smart wearable devices, and in particular, to a method and device for detecting blood oxygen saturation and a smart wearable device.

Background technique

In current smart wearable devices (such as head-mounted wearable devices or smart watches, etc.), some physiological data monitoring functions of the human body are integrated, such as monitoring of physiological data such as blood pressure, blood oxygen, heartbeat, etc., which can be worn by the wearer. Relevant physiological data for monitoring and feedback can improve the wearer's experience in using the wearable device.

The blood oxygen sensor detects the blood oxygen saturation (SpO ₂₎ by the reflective photoelectric principle, and is irradiated by the photoelectric receiver after the two different wavelengths of red light 600-700 nm and infrared light 800-1000 nm respectively. The electrical signal is calculated by calculating the ratio of the alternating current amplitude to the direct current amplitude of the red light signal and the ratio of the alternating current amplitude to the direct current amplitude of the infrared light signal, and then calculating the ratio of the two, and the correlation between the ratio and the blood oxygen saturation can be calculated. Bleeding oxygen saturation value. However, the DC signal is mainly the intrinsic reflection of human skin, blood vessels and other tissues. When the tissue is pressed, the reflectivity changes. Because the signal intensity detected by the reflective oxygen saturation is low, the DC ratio in the photoelectric signal is high. . This can cause minor oppressions that have a large impact on the end result.

technical problem

That is to say, when the blood oxygen sensor is applied to a device such as a wearable smart watch or a wearable wearable device, the wearer wears the strap during the wearing process or the wear of the wearable device to the blood oxygen The saturation value has a significant effect, which reduces the accuracy of the oxygen saturation measurement.

Technical solution

Based on this, in order to solve the conventional technology in applying the blood oxygen sensor to a device such as a wearable smart watch or a wearable wearable device, the wearer wears the strap during the wearing process or the wearable device of the wearable device. The technical problem of insufficient accuracy of oxygen saturation measurement caused by the obvious influence of the oxygen saturation value, and a method and device for detecting blood oxygen saturation, intelligent wearable device, and computer readable medium.

In a first aspect of the invention, a method of detecting blood oxygen saturation is presented.

A method of detecting blood oxygen saturation, the method being based on a smart wearable device including a blood oxygen sensor, the wearable device further comprising a pressure sensor disposed on the smart wearable device, the pressure sensor being available And detecting a wearing pressure value of the smart wearable device during wearing;

The method includes:

Acquiring an initial blood oxygen saturation value corresponding to the detected photoelectric signal by the blood oxygen sensor;

Detecting, by the pressure sensor, a wearing pressure value of the smart wearable device during wearing as a target pressure value;

The initial blood oxygen saturation value is filtered according to the preset pressure calibration data model and the target pressure value to obtain a corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.

Optionally, in one embodiment, the blood oxygen sensor further includes an infrared light emitting unit, a red light emitting unit, and a light detecting unit;

And the step of obtaining, by the blood oxygen sensor, an initial blood oxygen saturation value corresponding to the detected photoelectric signal, further comprising:

The infrared light emitting unit emits infrared light to the object to be measured, and the red light emitting unit emits red light to the object to be tested;

Receiving, by the light detecting unit, an optical signal corresponding to the infrared light and the red light reflected by the measured object, and converting the optical signal into an electrical signal by using a photoelectric receiver;

Calculating a first ratio of an alternating current amplitude and a direct current amplitude of the red light signal received by the light detecting unit, and calculating a second ratio of an alternating current amplitude and a direct current amplitude of the infrared light signal received by the light detecting unit, by calculating the first The ratio of the ratio to the second ratio determines the initial blood oxygen saturation value.

Optionally, in one embodiment, the step of determining the initial blood oxygen saturation value by calculating a ratio of the first ratio to the second ratio further includes:

The initial blood oxygen saturation value is calculated according to a preset physiological data model and a ratio of the first ratio to the second ratio.

Optionally, after the step of detecting, by the pressure sensor, the wearing pressure value of the smart wearable device as the target pressure value during the wearing process, the method further includes:

Determining whether the target pressure value exceeds a preset pressure value threshold interval;

When the target pressure value exceeds a preset pressure value threshold interval, generating prompt information and prompting to prompt the user to wear too loose or too tight;

And performing the filtering process on the initial blood oxygen saturation value according to the preset pressure calibration data model and the target pressure value, if the target pressure value does not exceed the preset pressure value threshold interval A step of correcting the blood oxygen saturation value corresponding to the initial blood oxygen saturation value.

Optionally, in one embodiment, the initial blood oxygen saturation value is filtered according to the preset pressure calibration data model and the target pressure value to obtain a value corresponding to the initial blood oxygen saturation value. The steps of correcting the oxygen saturation value further include:

And acquiring, in a database corresponding to the preset pressure calibration data model, a target pressure calibration data model corresponding to the target pressure value, and filtering the initial blood oxygen saturation value according to the target pressure calibration data model And obtaining the corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.

Optionally, in one embodiment, the pressure sensor is a resistive pressure sensor or an inductive pressure sensor.

In a second aspect of the invention, a blood oxygen saturation detecting device is proposed.

A blood oxygen saturation detecting device based on a smart wearable device including a blood oxygen sensor, the wearable device further comprising a pressure sensor disposed on the smart wearable device, the pressure sensor being available And detecting a wearing pressure value of the smart wearable device during wearing;

The device includes:

a blood oxygen saturation value detecting module, configured to acquire, by the blood oxygen sensor, an initial blood oxygen saturation value corresponding to the detected photoelectric signal;

a pressure detecting module, configured to detect, by the pressure sensor, a wearing pressure value of the smart wearable device during wearing as a target pressure value;

a data correction module, configured to filter the initial blood oxygen saturation value according to a preset pressure calibration data model and the target pressure value, to obtain a corrected blood oxygen saturation corresponding to the initial blood oxygen saturation value value.

The blood oxygen saturation value detecting module is further configured to emit infrared light to the object to be measured by the infrared light emitting unit, and emit red light to the object to be measured by the red light emitting unit; and pass the light detecting unit Receiving an optical signal corresponding to the infrared light and the red light reflected by the measured object, and converting the optical signal into an electrical signal by a photoreceiver; calculating a red light signal received by the light detecting unit Calculating a second ratio of an alternating current amplitude of the infrared light signal received by the light detecting unit to a direct current amplitude, and calculating a ratio of the first ratio to the second ratio by determining a first ratio of the amplitude of the alternating current to the direct current amplitude The initial oxygen saturation value is described.

Optionally, in an embodiment, the blood oxygen saturation value detecting module is further configured to calculate the initial according to a preset physiological data model and a ratio of the first ratio to the second ratio Blood oxygen saturation value.

Optionally, in an embodiment, the device further includes a pressure determining module, configured to determine whether the target pressure value exceeds a preset pressure value threshold interval; and the target pressure value exceeds a preset pressure value threshold In the case of the interval, the prompt information is generated and prompted to prompt the user to wear too loose or too tight; and the data correction module is invoked if the target pressure value does not exceed the preset pressure value threshold interval.

Optionally, in an embodiment, the data correction module is further configured to acquire, in a database corresponding to the preset pressure calibration data model, a target pressure calibration data model corresponding to the target pressure value, according to the The target pressure calibration data model filters the initial blood oxygen saturation value to obtain the corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.

In a third aspect of the invention, a smart wearable device is presented.

A smart wearable device comprising a blood oxygen saturation detecting device as described above.

Optionally, in an embodiment, the smart wearable device comprises a housing, the blood oxygen sensor is disposed inside the housing, and the pressure sensor is disposed inside or outside the housing.

Optionally, in an embodiment, the housing is provided with an aperture through which light passes, and infrared light emitted by the infrared light emitting unit emits infrared light through the aperture, and the red light emitting unit emits The red light emits infrared light through the aperture in the radial direction, and the light detecting unit receives the optical signal returned by the measured object through the aperture.

Optionally, in one embodiment, the number of the apertures is one or three.

In a fourth aspect of the invention, a computer readable medium is presented.

A computer readable storage medium comprising computer instructions that, when executed on a computer, cause the computer to perform a method of detecting blood oxygen saturation as previously described.

Beneficial effect

Implementation of the embodiments of the present invention will have the following beneficial effects:

After the above blood oxygen saturation detecting method and device and the smart wearable device are used, in the process of detecting the blood oxygen saturation of the wearer by the blood oxygen sensor disposed on the smart wearable device, considering the wearing pressure for the blood The influence of the accuracy of the oxygen saturation value, the pressure sensor is set at the wearing position of the smart wearable device, the wearing pressure during the wearing process is detected, and the detected blood oxygen saturation value is performed by the preset pressure calibration data model. Filter calibration to improve the accuracy of blood oxygen saturation detection.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

among them:

1 is a schematic structural diagram of an intelligent wearable device in an embodiment;

2 is a schematic flow chart of a method for detecting blood oxygen saturation in an embodiment;

3 is a schematic structural view of a blood oxygen sensor in an embodiment;

4 is a schematic flow chart of a method for calculating an initial blood oxygen saturation value in one embodiment;

Figure 5 is a schematic view showing the structure of a blood oxygen sensor in an embodiment;

6 is a schematic structural view of a blood oxygen sensor in an embodiment;

7 is a schematic flow chart of a pressure judging process in an embodiment;

FIG. 8 is a schematic flow chart of a method for detecting blood oxygen saturation in an embodiment; FIG.

Figure 9 is a schematic structural view of a blood oxygen saturation detecting device in an embodiment;

Figure 10 is a block diagram showing the construction of a computer apparatus for operating the aforementioned method for detecting blood oxygen saturation in one embodiment.

Embodiments of the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to solve the traditional technology in the application of the blood oxygen sensor on a wearable smart watch or a wearable device such as a wearable wearable device, the wearer wears the strap during the wearing process or the wearable wearable device of the wearable device. The oxygen saturation value may have a significant influence on the technical problem of insufficient accuracy of blood oxygen saturation measurement. In the present embodiment, a method for detecting blood oxygen saturation is proposed, and the implementation of the method may depend on A computer program executable on a von Neumann system-based computer system, which may be a data-corrected application based on blood oxygen saturation detection, or a control program for blood oxygen saturation measurement. The computer system may be a computer device such as a smartphone, tablet, personal computer or the like running the above computer program or a smart wearable device running the above computer program.

It should be noted that, in this embodiment, the foregoing method for detecting blood oxygen saturation may be performed based on a smart wearable device provided with a blood oxygen sensor capable of detecting blood oxygen saturation, or with the wearable device. Connected computer equipment.

The above method for detecting blood oxygen saturation is performed based on the smart wearable device 10 including the blood oxygen sensor 100 and the pressure sensor 200 as shown in FIG. 1, that is, the blood oxygen sensor and the pressure sensor are disposed, for example, in intelligence. On a device such as a watch or a wearable device; wherein the blood oxygen sensor can be used to detect the oxygen saturation of the wearer, and the pressure sensor can be used to detect the wear pressure of the wearer during the wearing of the wearable device, for example Detecting the magnitude of the pressure value of the wristband on the wrist during the wearing of the smart watch, and detecting, for example, the pressure of the wearable device on the head during wear of the wearable wearable device by the wearer The size of the value.

Specifically, as shown in FIG. 2, the above method for detecting blood oxygen saturation includes the following steps S1-S3:

Step S1: Acquire an initial blood oxygen saturation value corresponding to the detected photoelectric signal by the blood oxygen sensor.

The blood oxygen sensor adopts the reflective photoelectric principle. After two different wavelengths of red light 600~700nm and infrared light 800~1000nm respectively, the irradiated tissue is reflected and converted into an electrical signal by the photoelectric receiver, and the red light signal is exchanged. The ratio of the amplitude to the DC amplitude and the ratio of the amplitude of the infrared light signal to the DC amplitude are calculated, and the ratio of the ratio is correlated with the oxygen saturation to calculate the blood oxygen saturation value. That is to say, the blood oxygen sensor can detect the parameter corresponding to the oxygen saturation of the wearer wearing the corresponding smart wearable device and the specific value, that is, the blood oxygen saturation value. As mentioned above, because the wearer wears a smart wearable device, the wearing pressure may cause the corresponding wearing pressure to be different, that is, the skin measured by the blood oxygen sensor may be subjected to different pressures, thereby There is a certain deviation in the blood oxygen saturation value. Therefore, in the present embodiment, the blood oxygen saturation value detected in this step is the initial blood oxygen saturation value.

In a specific embodiment, as shown in FIG. 3, the blood oxygen sensor 100 further includes an infrared light emitting unit 101, a red light emitting unit 102, and a light detecting unit 103, wherein the infrared light emitting unit is used for the object to be tested. The skin tissue transmits infrared light, and wherein the infrared light corresponds to a wavelength of 800 to 1000 nm, the red light emitting unit is configured to send red light to the skin tissue of the object to be tested, wherein the red light corresponds to a wavelength of 600 to 700 nm, and the light detecting unit It is used to receive an optical signal reflected back from the skin tissue of the subject and convert it into an electrical signal to determine blood oxygen saturation.

Specifically, in a specific embodiment, as shown in step S1 of FIG. 4, the initial blood oxygen saturation value corresponding to the detected photoelectric signal is obtained by the blood oxygen sensor, and further includes the following steps S11-S14:

Step S11: emitting infrared light to the object to be measured by the infrared light emitting unit, and emitting red light to the object to be measured by the red light emitting unit;

Step S12: receiving, by the light detecting unit, an optical signal corresponding to the infrared light and the red light reflected by the measured object, and converting the optical signal into an electrical signal by using a photoelectric receiver;

Step S13: calculating a first ratio of an alternating current amplitude and a direct current amplitude of the red light signal received by the light detecting unit, and calculating a second ratio of an alternating current amplitude and a direct current amplitude of the infrared light signal received by the light detecting unit;

Step S14: determining the initial blood oxygen saturation value by calculating a ratio of the first ratio to the second ratio.

That is to say, the infrared light emitting unit and the red light emitting unit respectively generate infrared light and red light to the skin tissue of the object to be measured, and then the light detecting unit detects and receives the light signal reflected by the skin tissue, and converts it through the photoelectric receiver. Into the electrical signal. Then, for the infrared light and the red light, respectively calculate the ratio between the AC amplitude and the DC amplitude in the electrical signal converted by the reflected optical signal, that is, the first ratio corresponding to the red light and the second ratio corresponding to the infrared light . Finally, the corresponding blood oxygen saturation value, ie the initial blood oxygen saturation value, is calculated by calculating the ratio between the first ratio and the second ratio.

It should be noted that, in this embodiment, the ratio between the first ratio and the second ratio is not directly equal to the blood oxygen saturation value, but needs to be based on the correspondence between the ratio and the blood oxygen saturation value. To determine the oxygen saturation value.

Specifically, the foregoing step S14 is: determining the initial blood oxygen saturation value by calculating a ratio of the first ratio to the second ratio, further comprising step S141:

Step S141: Calculate the initial blood oxygen saturation value according to a preset physiological data model and a ratio of the first ratio to the second ratio.

That is to say, for the current blood oxygen sensor, the corresponding data comparison table or calculation coefficient is obtained in advance, for example, a reference blood glucose saturation tester is used to obtain a comparison relationship between the above ratio and the blood oxygen saturation value. Or calculating a coefficient as the preset physiological data model for calculating an initial blood oxygen saturation value based on the ratio. That is, the blood oxygen saturation value corresponding to the ratio, that is, the initial blood oxygen saturation value, is calculated by the ratio of the first ratio to the second ratio, and the data comparison table and the calculation coefficient included in the physiological data model.

Step S2: detecting, by the pressure sensor, a wearing pressure value of the smart wearable device during wearing as a target pressure value.

In the present embodiment, a pressure sensor is installed inside or outside the housing of the device in which the blood oxygen sensor is located for detecting the wearing pressure of the wearer during the wearing of the smart wearable device. Moreover, in an alternative implementation, the pressure sensor is an inductive pressure sensor when the pressure sensor is mounted inside the housing, and the pressure sensor is a resistive pressure sensor when the pressure sensor is mounted outside the housing. During the wearing process, the pressure sensor is attached to the skin of the subject to monitor the wearing pressure.

In a specific embodiment, as shown in Figures 5 and 6, an example of the mounting of the pressure sensor 200 in a particular embodiment is shown. The pressure sensor 200 is secured to the housing 300 by deformation of the housing 300. The pressure is detected and the housing 300 has an aperture for light to pass through. Specifically, as shown in FIG. 5, the pressure sensor 200 is circular, the blood oxygen sensor 100 is disposed on a mounting plate 400, and then the mounting plate 400, the pressure sensor 200, and the housing 300 are fixed together; as shown in FIG. The pressure sensor is a rectangle 200, and the pressure sensor is fixed to the blood oxygen sensor 100 and the housing 300.

In the present embodiment, the execution of step S2 is triggered in the case where the smart wearable device is worn and the related operation of the blood oxygen saturation detection is initiated. It should be noted that, in this embodiment, the steps S1 and S2 may be performed sequentially, or may be performed in reverse order, or may be performed synchronously. In this embodiment, the execution order of the steps S1 and S2 is not limited. .

Step S3: Filtering the initial blood oxygen saturation value according to the preset pressure calibration data model and the target pressure value to obtain a corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.

In this embodiment, the blood oxygen saturation of the same object is tested according to a standard blood oxygen saturation tester and a current blood oxygen sensor or a smart wearable device including a blood oxygen sensor, and the corresponding measurement is performed synchronously. The pressure value establishes a correlation between the pressure value, the standard oxygen saturation value, and the initial blood oxygen saturation value detected by the blood oxygen sensor. Based on the sample number, the pressure calibration data model can be used to calibrate the blood oxygen data detected by the blood oxygen sensor to obtain more accurate blood oxygen data.

That is, the initial blood oxygen saturation value is filtered according to the pressure calibration data model and the detected target pressure value, thereby correcting the influence of the wearing pressure on the blood oxygen saturation value, and obtaining a more accurate blood oxygen saturation. value.

Generally speaking, the influence of the different wearing pressure values on the blood oxygen saturation value is also different, that is, the influence of the pressure value change and the blood oxygen saturation value error has more than a simple linear influence, therefore, In order to improve the accuracy of filtering the initial blood oxygen saturation value, in the present embodiment, different filter calibration modes can also be set for different pressure values.

Specifically, in the above step S3, the initial blood oxygen saturation value is filtered according to the preset pressure calibration data model and the target pressure value, and the corrected blood oxygen saturation corresponding to the initial blood oxygen saturation value is obtained. And the method further includes: acquiring, in a database corresponding to the preset pressure calibration data model, a target pressure calibration data model corresponding to the target pressure value, and calibrating the data model to the initial blood oxygen according to the target pressure The saturation value is subjected to a filtering process to obtain the corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.

That is, the pressure calibration data model is a set of multiple pressure calibration data models for different pressure values, and after determining the target pressure value, determining a target pressure calibration data model corresponding to the pressure value, and determining according to the determination The target pressure calibration data model performs a filter calibration process on the initial blood oxygen saturation value, and finally corrects the blood oxygen saturation value after the correction, thereby further improving the accuracy of the blood oxygen saturation value measurement.

In this embodiment, if the smart wearable device is worn too loose or too tight, the blood oxygen saturation value may be greatly deviated, and the filter correction may be greatly degraded in the latter case. It is not necessary to perform subsequent filtering correction, and the user is directly prompted to correct the wearing mode.

Specifically, in the above step S2, after the pressure sensor detects the wearing pressure value of the smart wearable device as the target pressure value, as shown in FIG. 7, the following steps S22-S3 are further included:

Step S21: determining whether the target pressure value exceeds a preset pressure value threshold interval;

If the target pressure value exceeds the preset pressure value threshold interval, step S22 is performed: generating prompt information and prompting to prompt the user to wear too loose or too tight;

If the target pressure value does not exceed the preset pressure value threshold interval, step S3 is performed: filtering the initial blood oxygen saturation value according to the preset pressure calibration data model and the target pressure value, A corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value is obtained.

In this embodiment, a maximum wearing pressure value and a minimum wearing pressure value are preset, and in a case where the detected target pressure value is greater than the maximum wearing pressure value or less than the minimum wearing pressure value, step S3 is not performed. The filter calibration step for the initial oxygen saturation value directly prompts the user to wear too loose or too tight. For example, prompting by voice, vibration, screen, etc.

In a specific embodiment, as shown in FIG. 8, FIG. 8 shows a schematic flow chart of the above method for detecting blood oxygen saturation.

In another embodiment of the present invention, there is also provided a blood oxygen saturation detecting device based on a smart wearable device including a blood oxygen sensor, the wearable device further comprising being disposed in the smart A pressure sensor on the wearable device, the pressure sensor being operative to detect a wear pressure value of the smart wearable device during wearing.

Specifically, as shown in FIG. 9, the device includes a blood oxygen saturation value detecting module 11, a pressure detecting module 12, and a data correcting module 13, wherein:

The blood oxygen saturation value detecting module 11 is configured to obtain, by the blood oxygen sensor, an initial blood oxygen saturation value corresponding to the detected photoelectric signal;

a pressure detecting module 12, configured to detect, by the pressure sensor, a wearing pressure value of the smart wearable device during wearing as a target pressure value;

The data correction module 13 is configured to filter the initial blood oxygen saturation value according to a preset pressure calibration data model and the target pressure value, to obtain a corrected blood oxygen saturation corresponding to the initial blood oxygen saturation value. Degree value.

Optionally, in one embodiment, the blood oxygen sensor further includes an infrared light emitting unit, a red light emitting unit, and a light detecting unit; and the blood oxygen saturation value detecting module 11 is further configured to pass the infrared light emitting unit. Generating infrared light to the object to be measured, and transmitting red light to the object to be measured by the red light emitting unit; receiving, by the light detecting unit, the infrared light reflected by the object to be measured, and the red light Corresponding optical signal, and converting the optical signal into an electrical signal through a photoreceiver; calculating a first ratio of an alternating current amplitude and a direct current amplitude of the red light signal received by the light detecting unit, and calculating the received by the light detecting unit a second ratio of an amplitude of the infrared light signal to a magnitude of the direct current, the initial blood oxygen saturation value being determined by calculating a ratio of the first ratio to the second ratio.

Optionally, in an embodiment, the blood oxygen saturation value detecting module 11 is further configured to calculate the ratio according to a preset physiological data model and a ratio of the first ratio to the second ratio. Initial oxygen saturation value.

Optionally, in an embodiment, as shown in FIG. 9, the apparatus further includes a pressure determining module 14 configured to determine whether the target pressure value exceeds a preset pressure value threshold interval; and the target pressure value exceeds In the case of a preset pressure value threshold interval, the prompt information is generated and prompted to prompt the user to wear too loose or too tight; if the target pressure value does not exceed the preset pressure value threshold interval, the call is invoked. Data correction module.

Optionally, in an embodiment, the data correction module 13 is further configured to acquire, in a database corresponding to the preset pressure calibration data model, a target pressure calibration data model corresponding to the target pressure value, according to The target pressure calibration data model filters the initial blood oxygen saturation value to obtain the corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.

In another embodiment of the present invention, there is also provided a smart wearable device comprising the blood oxygen saturation detecting device as described above, that is, including in the smart wearable device A pressure sensor is provided, and a blood oxygen sensor, wherein the pressure sensor can be used to detect a wearing pressure value of the smart wearable device during wearing, and the blood oxygen sensor can be used to monitor a wearer's blood oxygen saturation value.

Specifically, in an optional embodiment, the smart wearable device includes a housing, the blood oxygen sensor is disposed inside the housing, and the pressure sensor is disposed inside or outside the housing, and The pressure sensor is an inductive pressure sensor when the pressure sensor is mounted inside the housing, and the pressure sensor is a resistive pressure sensor when the pressure sensor is mounted outside the housing. During the wearing process, the pressure sensor is attached to the skin of the subject to monitor the wearing pressure.

As shown in FIGS. 5 and 6, the housing is provided with an aperture through which light can pass, and infrared light emitted from the infrared light emitting unit transmits infrared light through the aperture, and the red light emitted by the red light emitting unit passes through The object in the radial direction emits infrared light, and the light detecting unit receives the optical signal returned by the object to be measured through the aperture. Moreover, the number of the apertures is one or three, that is, in the case where the number of the apertures is one, the infrared light emitting unit, the red light emitting unit, and the light receiving unit receive and transmit through the aperture. The optical signal, in the case where the number of apertures is three, may be provided for the sub-apertures of the infrared light emitting unit, the red light emitting unit, and the light receiving unit, respectively, as shown in FIG. 5 or 6.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.

In one embodiment, as shown in FIG. 10, FIG. 10 illustrates a terminal of a von Neumann system-based computer system that operates the above-described method of detecting blood oxygen saturation. The computer system can be a terminal device such as a smartphone, a tablet, a palmtop, a laptop, or a personal computer. Specifically, an external input interface 1001, a processor 1002, a memory 1003, and an output interface 1004 connected through a system bus may be included. The external input interface 1001 can optionally include at least a network interface 10012. The memory 1003 may include an external memory 10032 (eg, a hard disk, an optical disk, or a floppy disk, etc.) and an internal memory 10034. The output interface 1004 can include at least a device such as a display 10042.

In this embodiment, the operation of the method is based on a computer program whose program file is stored in the external memory 10032 of the aforementioned von Neumann system-based computer system, loaded into the internal memory 10034 at runtime, and then After being compiled into a machine code, it is passed to the processor 1002 for execution, so that the logical target message receiving module 102, the risk determining module 104, the first answer information acquiring module 106, and the first are formed in the von Neumann system-based computer system. The two answer information obtaining module 108, the answer information matching module 110, and the risk prompting module 112. And during the execution of the above-mentioned blood oxygen saturation detecting method, the input parameters are all received through the external input interface 1001, and transferred to the buffer in the memory 1003, and then input to the processor 1002 for processing, and the processed result data or cached in Subsequent processing is performed in the memory 1003 or passed to the output interface 1004 for output.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

A method for detecting blood oxygen saturation, characterized in that the method is based on a smart wearable device including a blood oxygen sensor, the wearable device further comprising a pressure sensor disposed on the smart wearable device, The pressure sensor can be used to detect a wearing pressure value of the smart wearable device during wearing;

The method includes:

Acquiring an initial blood oxygen saturation value corresponding to the detected photoelectric signal by the blood oxygen sensor;

Detecting, by the pressure sensor, a wearing pressure value of the smart wearable device during wearing as a target pressure value;

The initial blood oxygen saturation value is filtered according to the preset pressure calibration data model and the target pressure value to obtain a corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.
The method according to claim 1, wherein the blood oxygen sensor further comprises an infrared light emitting unit, a red light emitting unit, and a light detecting unit;

And the step of obtaining, by the blood oxygen sensor, an initial blood oxygen saturation value corresponding to the detected photoelectric signal, further comprising:

The infrared light emitting unit emits infrared light to the object to be measured, and the red light emitting unit emits red light to the object to be tested;

Receiving, by the light detecting unit, an optical signal corresponding to the infrared light and the red light reflected by the measured object, and converting the optical signal into an electrical signal by using a photoelectric receiver;

Calculating a first ratio of an alternating current amplitude and a direct current amplitude of the red light signal received by the light detecting unit, and calculating a second ratio of an alternating current amplitude and a direct current amplitude of the infrared light signal received by the light detecting unit, by calculating the first The ratio of the ratio to the second ratio determines the initial blood oxygen saturation value.
The method according to claim 2, wherein the step of determining the initial blood oxygen saturation value by calculating a ratio of the first ratio to the second ratio further comprises:

The initial blood oxygen saturation value is calculated according to a preset physiological data model and a ratio of the first ratio to the second ratio.
The method according to any one of claims 1 to 3, further comprising: after the step of detecting, by the pressure sensor, a wearing pressure value of the smart wearable device as a target pressure value during the wearing process, further comprising:

Determining whether the target pressure value exceeds a preset pressure value threshold interval;

When the target pressure value exceeds a preset pressure value threshold interval, generating prompt information and prompting to prompt the user to wear too loose or too tight;

And performing the filtering process on the initial blood oxygen saturation value according to the preset pressure calibration data model and the target pressure value, if the target pressure value does not exceed the preset pressure value threshold interval A step of correcting the blood oxygen saturation value corresponding to the initial blood oxygen saturation value.
The method according to claim 1, wherein the initial blood oxygen saturation value is filtered according to a preset pressure calibration data model and the target pressure value, and the initial blood oxygen saturation value is obtained. The corresponding steps of correcting the oxygen saturation value further include:

And acquiring, in a database corresponding to the preset pressure calibration data model, a target pressure calibration data model corresponding to the target pressure value, and filtering the initial blood oxygen saturation value according to the target pressure calibration data model And obtaining a corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.
The method according to any one of claims 1 to 5, characterized in that the pressure sensor is a resistive pressure sensor or an inductive pressure sensor.
A blood oxygen saturation detecting device, characterized in that the device is based on a smart wearable device including a blood oxygen sensor, the wearable device further comprising a pressure sensor disposed on the smart wearable device, The pressure sensor can be used to detect a wearing pressure value of the smart wearable device during wearing;

The device includes:

a blood oxygen saturation value detecting module, configured to acquire, by the blood oxygen sensor, an initial blood oxygen saturation value corresponding to the detected photoelectric signal;

a pressure detecting module, configured to detect, by the pressure sensor, a wearing pressure value of the smart wearable device during wearing as a target pressure value;

a data correction module, configured to filter the initial blood oxygen saturation value according to a preset pressure calibration data model and the target pressure value, to obtain a corrected blood oxygen saturation corresponding to the initial blood oxygen saturation value value.
The device according to claim 7, wherein the blood oxygen sensor further comprises an infrared light emitting unit, a red light emitting unit, and a light detecting unit;

The blood oxygen saturation value detecting module is further configured to emit infrared light to the object to be measured by the infrared light emitting unit, and emit red light to the object to be measured by the red light emitting unit; and pass the light detecting unit Receiving an optical signal corresponding to the infrared light and the red light reflected by the measured object, and converting the optical signal into an electrical signal by a photoreceiver; calculating a red light signal received by the light detecting unit Calculating a second ratio of an alternating current amplitude of the infrared light signal received by the light detecting unit to a direct current amplitude, and calculating a ratio of the first ratio to the second ratio by determining a first ratio of the amplitude of the alternating current to the direct current amplitude The initial oxygen saturation value is described.
The apparatus according to claim 8, wherein the blood oxygen saturation value detecting module is further configured to calculate according to a preset physiological data model and a ratio of the first ratio to the second ratio The initial blood oxygen saturation value.
The device according to any one of claims 7 to 9, wherein the device further comprises a pressure judging module, configured to determine whether the target pressure value exceeds a preset pressure value threshold interval; and the target pressure value When the preset pressure value threshold interval is exceeded, the prompt information is generated and prompted to prompt the user to wear too loose or too tight; if the target pressure value does not exceed the preset pressure value threshold interval, the call is performed. The data correction module.
The device according to claim 7, wherein the data correction module is further configured to acquire a target pressure calibration data model corresponding to the target pressure value in a database corresponding to the preset pressure calibration data model And filtering the initial blood oxygen saturation value according to the target pressure calibration data model to obtain the corrected blood oxygen saturation value corresponding to the initial blood oxygen saturation value.
The device according to any one of claims 7 to 11, wherein the pressure sensor is a resistive pressure sensor or an inductive pressure sensor.
A smart wearable device, characterized in that the smart wearable device comprises the blood oxygen saturation detecting device according to claims 7-12.
The smart wearable device according to claim 13, wherein the smart wearable device comprises a housing, the blood oxygen sensor is disposed inside the housing, and the pressure sensor is disposed inside the housing Or external.
The smart wearable device according to claim 13, wherein the housing is provided with an aperture through which light passes, and infrared light emitted from the infrared light emitting unit emits infrared light through the aperture. The red light emitted by the red light emitting unit emits infrared light through the hole in the radial direction, and the light detecting unit receives the light signal returned by the measured object through the aperture.
The smart wearable device according to claim 13, wherein the number of the apertures is one or three.
A computer readable storage medium comprising computer instructions that, when executed on a computer, cause the computer to perform the method of detecting blood oxygen saturation as set forth in claims 1-6.