Blood oxygen value determination method and device, equipment, storage medium and program product

Abstract

The invention relates to a blood oxygen value determination method and device, equipment, a storage medium and a program product. The method comprises the following steps: acquiring a first light intensity signal received by a light signal receiver; when the signal quality of the first light intensity signal does not meet the preset condition, increasing the number of opened optical signal transmitters and / or optical signal receivers; second light intensity signals obtained after signal enhancement and received by the light signal receiver are obtained, the first light intensity signals and the second light intensity signals are in a time sequence, and the second light intensity signals comprise received red light signals or infrared light signals emitted by different light signal emitters; and determining a blood oxygen value according to the second light intensity signal. By adopting the method, the accuracy of determining the blood oxygen value can be improved.

Description

Technical Field

[0001] The present application relates to the field of pulse oximeter technology, and in particular to a method, apparatus, device, storage medium, and program product for determining a blood oxygen value. Background Art

[0002] Blood oxygen value, also known as blood oxygen saturation, is one of the important basic data in clinical medicine. The blood oxygen value refers to the percentage of the combined O2 capacity in the total blood volume to the total available O2 capacity. The normal blood oxygen value of the human body should be between 94% and 98%. The blood oxygen value can be tested by a pulse oximeter.

[0003] Currently, existing pulse oximeters are usually of the finger-clip contact type. Due to the consideration of detection accuracy, blood oxygen saturation is most often measured on the finger.

[0004] However, the accuracy of blood oxygen values ​​measured by existing pulse oximeters is low. Summary of the Invention

[0005] Based on this, it is necessary to provide a blood oxygen value determination method, device, equipment, storage medium and program product that can accurately determine the blood oxygen value to address the above technical problems.

[0006] In a first aspect, the present application provides a method for determining a blood oxygen value, which is used in a ring-type pulse oximeter. The inner ring of the ring-type pulse oximeter is provided with two optical signal transmitter installation areas and one receiver installation area. The optical signal transmitter installation area includes at least one optical signal transmitter, and the receiver installation area includes at least one optical signal receiver. The method includes:

[0007] Acquire a first light intensity signal received by the optical signal receiver;

[0008] When the signal quality of the first light intensity signal does not meet a preset condition, increasing the number of optical signal transmitters and / or optical signal receivers that are turned on;

[0009] Acquire a second light intensity signal after the signal is enhanced and received by the optical signal receiver, wherein the first light intensity signal and the second light intensity signal are a time series, and the second light intensity signal includes red light signals or infrared light signals received from different optical signal transmitters;

[0010] The blood oxygen value is determined according to the second light intensity signal.

[0011] In one embodiment, determining the blood oxygen value according to the second light intensity signal includes:

[0012] determining an AC component and a DC component corresponding to each optical signal transmitter according to the second light intensity signal;

[0013] Determine the target AC component and target DC component respectively according to the AC component and DC component corresponding to each optical signal transmitter;

[0014] The blood oxygen value is determined based on the target AC component and the target DC component.

[0015] In one embodiment, the AC component includes an AC red light component and an AC infrared component, and determining the AC component and the DC component corresponding to each optical signal transmitter according to the second light intensity signal includes:

[0016] Obtaining the acceleration signal of the object under test;

[0017] Determine the AC red light component corresponding to each optical signal transmitter according to the red light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal;

[0018] The AC infrared component corresponding to each optical signal transmitter is determined according to the infrared light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal.

[0019] In one embodiment, the DC component includes a DC red light component and a DC infrared component, and the AC component and the DC component corresponding to each optical signal transmitter are determined according to the second light intensity signal, further comprising:

[0020] Determining a first voltage signal corresponding to each optical signal transmitter according to the red light signal corresponding to each optical signal transmitter in the light intensity signal;

[0021] determining a second voltage signal corresponding to each optical signal transmitter according to the infrared light signal corresponding to each optical signal transmitter in the light intensity signal;

[0022] For each optical signal transmitter, determining a corresponding DC red light component according to the average value of the first voltage signal;

[0023] For each optical signal transmitter, the corresponding direct current infrared component is determined according to the average value of the second voltage signal.

[0024] In one embodiment, the target AC component includes a target AC red light component and a target AC infrared component, and the target DC component includes a target DC red light component and a target DC infrared component. The target AC component and the target DC component are determined based on the AC component and the DC component corresponding to each optical signal transmitter, respectively, including:

[0025] Performing weighted processing on the AC red light components corresponding to each optical signal transmitter to determine the target AC red light component;

[0026] Perform weighted processing on the AC infrared components corresponding to each optical signal transmitter to determine the target AC infrared component;

[0027] Performing weighted processing on the DC red light components corresponding to each optical signal transmitter to determine the target DC red light component;

[0028] The DC infrared components corresponding to each optical signal transmitter are weighted to determine the target DC infrared component.

[0029] In one embodiment, determining a blood oxygen value based on a target AC component and a target DC component includes:

[0030] determining a calculation factor according to a target AC red light component, a target AC infrared component, a target DC red light component, and a target DC infrared component;

[0031] The blood oxygen value is determined based on the square of the calculation factor and the calculation factor.

[0032] In one embodiment, a deviation between an interval angle of each installation area on the inner circle of the ring-type pulse oximeter and a preset interval angle satisfies a preset deviation range, wherein the preset interval angle is 120°.

[0033] In a second aspect, the present application further provides a blood oxygen value determination device, which is provided in a finger-ring pulse oximeter. The inner ring of the finger-ring pulse oximeter is provided with two optical signal transmitter installation areas and one receiver installation area. The optical signal transmitter installation area includes at least one optical signal transmitter, and the receiver installation area includes at least one optical signal receiver. The device includes:

[0034] A first acquisition module, configured to acquire a first light intensity signal received by the optical signal receiver;

[0035] an enhancement module, configured to increase the number of activated optical signal transmitters and / or optical signal receivers when the signal quality of the first optical intensity signal does not meet a preset condition;

[0036] A second acquisition module is used to acquire a second light intensity signal after the signal received by the optical signal receiver is enhanced, the first light intensity signal and the second light intensity signal are a time series, and the second light intensity signal includes red light signals or infrared light signals received from different optical signal transmitters;

[0037] The determination module is used to determine the blood oxygen value according to the enhanced light intensity signal.

[0038] In one embodiment, the determination module is specifically used to determine the AC component and DC component corresponding to each optical signal transmitter based on the second light intensity signal; determine the target AC component and target DC component respectively based on the AC component and DC component corresponding to each optical signal transmitter; and determine the blood oxygen value based on the target AC component and target DC component.

[0039] In one embodiment, the AC component includes an AC red light component and an AC infrared component, and the determination module is specifically used to obtain the acceleration signal of the object under test; determine the AC red light component corresponding to each optical signal transmitter based on the red light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal; and determine the AC infrared component corresponding to each optical signal transmitter based on the infrared light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal.

[0040] In one embodiment, the DC component includes a DC red light component and a DC infrared component, and the determination module is specifically used to determine the first voltage signal corresponding to each optical signal transmitter based on the red light signal corresponding to each optical signal transmitter in the light intensity signal; determine the second voltage signal corresponding to each optical signal transmitter based on the infrared light signal corresponding to each optical signal transmitter in the light intensity signal; for each optical signal transmitter, determine the corresponding DC red light component based on the average value of the first voltage signal; for each optical signal transmitter, determine the corresponding DC infrared component based on the average value of the second voltage signal.

[0041] In one embodiment, the target AC component includes a target AC red light component and a target AC infrared component, and the target DC component includes a target DC red light component and a target DC infrared component. The determination module is specifically used to perform weighted processing on the AC red light components corresponding to each optical signal transmitter to determine the target AC red light component; perform weighted processing on the AC infrared components corresponding to each optical signal transmitter to determine the target AC infrared component; perform weighted processing on the DC red light components corresponding to each optical signal transmitter to determine the target DC red light component; and perform weighted processing on the DC infrared components corresponding to each optical signal transmitter to determine the target DC infrared component.

[0042] In one embodiment, the determination module is specifically configured to determine a calculation factor based on a target AC red light component, a target AC infrared component, a target DC red light component, and a target DC infrared component; and determine a blood oxygen value based on the square of the calculation factor and the calculation factor.

[0043] In one embodiment, a deviation between an interval angle of each installation area on the inner circle of the ring-type pulse oximeter and a preset interval angle satisfies a preset deviation range, wherein the preset interval angle is 120°.

[0044] In a third aspect, the present application further provides a finger-ring pulse oximeter device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements any of the methods described in the first aspect when executing the computer program.

[0045] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the methods described in the first aspect above.

[0046] In a fifth aspect, the present application also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the methods described in the first aspect above.

[0047] The above-mentioned blood oxygen value determination method, device, equipment, storage medium and program product obtain a first light intensity signal received by an optical signal receiver; when the signal quality of the first light intensity signal does not meet a preset condition, increase the number of optical signal transmitters and / or optical signal receivers that are turned on; obtain a second light intensity signal received by the optical signal receiver after signal enhancement, the first light intensity signal and the second light intensity signal are a time series, and the second light intensity signal includes red light signals or infrared light signals received from different optical signal transmitters; and determine the blood oxygen value based on the second light intensity signal. In the above-mentioned method, by judging the signal quality of the received light intensity signal, when the signal quality does not meet the preset condition, the signal is enhanced to improve the signal quality, thereby improving the accuracy of the blood oxygen value determination. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 A schematic structural diagram of a ring-type pulse oximeter according to an embodiment;

[0050] Figure 2 A schematic diagram of a flow chart of a ring-type pulse oximeter method in one embodiment;

[0051] Figure 3 FIG1 is a flow chart of a step of determining a blood oxygen value according to a second light intensity signal in one embodiment;

[0052] Figure 4 A schematic flow chart of the steps of determining the AC component and DC component corresponding to each optical signal transmitter in one embodiment;

[0053] Figure 5 FIG1 is a flow chart of the steps of determining the AC component and DC component corresponding to each optical signal transmitter in another embodiment;

[0054] Figure 6 FIG1 is a flow chart of the steps of determining the AC component and DC component corresponding to each optical signal transmitter in another embodiment;

[0055] Figure 7FIG1 is a flow chart of the step of determining the blood oxygen value in one embodiment;

[0056] Figure 8 A schematic diagram of a flow chart of a finger ring type pulse oximeter method in another embodiment;

[0057] Figure 9 FIG. 1 is a structural block diagram of a device for determining a blood oxygen value in one embodiment. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0059] The blood oxygen value determination method provided in the embodiment of the present application can be applied to Figure 1 In the finger ring type pulse oximeter shown in FIG. , the inner circle of the finger ring type pulse oximeter 10 is provided with two optical signal transmitter installation areas 101 and a receiver installation area 102 , the optical signal transmitter installation area 110 includes at least one optical signal transmitter, and the receiver installation area 120 includes at least one optical signal receiver.

[0060] In an exemplary embodiment, Figure 2 As shown, a method for determining blood oxygen value is provided, which is applied to Figure 1 Taking the finger ring type pulse oximeter in FIG. 1 as an example, the method includes the following steps 201 to 204. Among them:

[0061] Step 201: Acquire a first light intensity signal received by an optical signal receiver.

[0062] Optionally, in the inner ring of the ring-type pulse oximeter, the angle between the two optical signal transmitter installation areas and the receiver installation area can be an obtuse angle, and the deviation between the interval angle of each installation area in the inner ring of the ring-type pulse oximeter and the preset interval angle meets the preset deviation range, where the preset interval angle is 120°.

[0063] For example, Figure 1As shown, the interval angle of each installation area on the inner circle of the ring-type pulse oximeter can be 120°, or the interval angle of each installation area can also fluctuate around 120°, and the preset deviation range can be [0, 36°], that is, the interval angle can be any angle within the range of [84°, 156°]. It can be understood that the sum of the interval angles of each installation area is 360°. For example, the interval angle between an optical signal transmitter installation area and a receiver installation area is 117°, the interval angle between another optical signal transmitter installation area and the receiver installation area is 125°, and the interval angle between the two optical signal transmitter installation areas is 118°.

[0064] Optionally, the optical signal receiver may be a photodiode, and the optical signal transmitter may be an LED transmitter.

[0065] Optionally, the ring-type pulse oximeter obtains a first light intensity signal received by the optical signal receiver, where the first light intensity signal is a signal received when the number of on-states of the optical signal transmitter and / or the optical signal receiver is not adjusted, that is, the number of on-states is the number of on-states at the last measurement or the number of on-states set initially.

[0066] It is understandable that the optical signal transmitter installation area and the receiver installation area may be respectively provided with a plurality of LED transmitters and photodiodes, and during use, some of the LED transmitters and photodiodes are not turned on.

[0067] Step 202 : When the signal quality of the first light intensity signal does not meet a preset condition, increase the number of activated optical signal transmitters and / or optical signal receivers.

[0068] In one possible implementation, whether the signal quality of the first light intensity signal meets a preset condition can be determined based on an evaluation method of machine learning or deep learning.

[0069] Exemplarily, the features of the first light intensity signal may be extracted, and then a machine learning algorithm such as a support vector machine or a random forest may be used to perform signal quality classification, and whether a preset condition is met is determined based on the classification result.

[0070] In another possible implementation manner, whether the signal quality of the first light intensity signal meets a preset condition may be determined based on the signal-to-noise ratio or signal amplitude of the first light intensity signal.

[0071] Exemplarily, the signal-to-noise ratio of the first light intensity signal can be determined, that is, the ratio of signal power to noise power. A higher signal-to-noise ratio indicates better signal quality. Therefore, when the signal-to-noise ratio of the first light intensity signal is less than a preset signal-to-noise ratio, it can be determined that the signal quality of the first light intensity signal does not meet the preset conditions.

[0072] Exemplarily, the first light intensity signal can be segmented to obtain several waveform segments of preset length, and the average amplitude difference of each waveform segment can be calculated. When the average amplitude difference is within a preset range, it can be determined that the signal quality of the first light intensity signal meets the preset conditions. When the average amplitude difference is not within the preset range, it can be determined that the signal quality of the first light intensity signal does not meet the preset conditions.

[0073] Optionally, when it is determined that the signal quality of the first light intensity signal does not meet a preset condition, the number of activated optical signal transmitters and / or optical signal receivers may be increased.

[0074] In one possible implementation, the number and type that need to be increased can be determined based on the first light intensity signal, the number of currently turned on optical signal transmitters and / or optical signal receivers, and the prediction model. The first light intensity signal and the number of currently turned on optical signal transmitters and / or optical signal receivers can be input into the prediction model. The prediction model can output the number of turned-on optical signal transmitters and / or optical signal receivers that need to be increased based on the first light intensity signal. The prediction model can be trained based on historical light intensity signals and the number of turned-on optical signal transmitters and / or optical signal receivers.

[0075] In another possible implementation, the increased quantity and type can be determined based on the signal quality of the first light intensity signal and a preset mapping table, where the preset mapping table is used to characterize the correspondence between different signal quality ranges and the total number of optical signal transmitters and / or optical signal receivers that are turned on.

[0076] For example, the total number of optical signal transmitters and / or optical signal receivers corresponding to the preset mapping table that are turned on can be determined based on the signal quality, and then the number of optical signal transmitters and / or optical signal receivers that need to be increased can be determined based on the number of optical signal transmitters and / or optical signal receivers that are currently turned on.

[0077] Step 203: Acquire a second light intensity signal after the signal is enhanced and received by the optical signal receiver.

[0078] The first light intensity signal and the second light intensity signal are time series, and the second light intensity signal includes red light signals or infrared light signals received from different light signal transmitters.

[0079] Optionally, the first light intensity signal and the second light intensity signal may be photoplethysmography signals.

[0080] Optionally, after increasing the number of LED emitters or photodiodes turned on, the second light intensity signal received by the optical signal receiver can be reacquired, wherein the signal quality of the second light intensity signal meets a preset condition.

[0081] Optionally, the signals corresponding to different time points in the second light intensity signal are red light signals or infrared light signals emitted by different optical signal transmitters, which can be determined according to the transmission frequency of each optical signal transmitter or the sampling frequency of the optical signal receiver. For example, taking two optical signal transmitters and one optical signal receiver as an example, 1ns in the second light intensity signal is the red light signal emitted by the first optical signal transmitter, the 2ns is the red light signal emitted by the second optical signal transmitter, the ins is the infrared light signal emitted by the first optical signal transmitter, and so on.

[0082] Step 204: Determine the blood oxygen value according to the second light intensity signal.

[0083] Optionally, the infrared / red light DC component and the infrared / red light AC component can be determined based on the second light intensity signal, and then the blood oxygen value can be determined based on the above DC component and AC component. The embodiment of the present application does not limit the method of determining the blood oxygen value based on the second light intensity signal.

[0084] The above-mentioned method for determining the blood oxygen value obtains a first light intensity signal received by an optical signal receiver; when the signal quality of the first light intensity signal does not meet a preset condition, increases the number of optical signal transmitters and / or optical signal receivers that are turned on; obtains a second light intensity signal received by the optical signal receiver after signal enhancement, wherein the first light intensity signal and the second light intensity signal are a time series, and the second light intensity signal includes red light signals or infrared light signals received from different optical signal transmitters; and determines the blood oxygen value based on the second light intensity signal. In the above-mentioned method, by judging the signal quality of the received light intensity signal, when the signal quality does not meet the preset condition, the signal is enhanced to improve the signal quality, thereby improving the accuracy of the blood oxygen value determination. At the same time, since the spacing between the installation areas on the inner circle of the ring-type pulse oximeter in the ring-type pulse oximeter can be an obtuse angle, the influence of the finger bones on the light intensity signal can be avoided through transmission reception, further improving the accuracy of the blood oxygen value determination.

[0085] In an exemplary embodiment, Figure 3 As shown, optionally, determining the blood oxygen value according to the second light intensity signal includes the following steps 301 to 302. In which:

[0086] Step 301: Determine the AC component and DC component corresponding to each optical signal transmitter according to the second optical intensity signal.

[0087] Optionally, since the second light intensity signal includes signals sent by multiple optical signal transmitters, the signal corresponding to each optical signal transmitter can be determined according to the transmission frequency of each optical signal transmitter or the sampling frequency of the optical signal receiver, and then the corresponding AC component and DC component can be determined based on each signal.

[0088] The DC component can be the constant part of the signal, indicating the average value or baseline level of the signal; the AC component is the fluctuating part of the signal.

[0089] In one possible implementation, the DC component may be extracted by a low-pass filter, and the AC component may be extracted by a high-pass filter; or the DC component may be extracted by a moving average method, and the AC component may be extracted by a differential method.

[0090] Step 302 : Determine a target AC component and a target DC component according to the AC component and DC component corresponding to each optical signal transmitter.

[0091] Optionally, a weighted summation may be performed on the AC components corresponding to the optical signal transmitters to determine the target AC component, and a weighted summation may be performed on the DC components corresponding to the optical signal transmitters to determine the target DC component.

[0092] Step 303: Determine the blood oxygen value according to the target AC component and the target DC component.

[0093] Optionally, the target AC component includes a target infrared AC component and a target red light AC component, and the target DC component includes a target infrared DC component and a target red light DC component.

[0094] In one possible implementation, the R value can be determined based on the target AC component and the target DC component, and then the blood oxygen value is calculated based on R and a calibration curve, where the calibration curve is obtained through experiments and describes the relationship between the R value and the blood oxygen value.

[0095] The above method determines the AC component and DC component corresponding to each optical signal transmitter according to the second light intensity signal, determines the target AC component and target DC component according to the AC component and DC component corresponding to each optical signal transmitter, and determines the blood oxygen value according to the target AC component and target DC component. In this way, the blood oxygen value of the second light intensity signal that meets the preset requirements can be determined based on the signal quality, which can improve the accuracy of the blood oxygen value determination.

[0096] In an exemplary embodiment, the AC component includes an AC red component and an AC infrared component, such as Figure 4 As shown, optionally, determining the AC component and DC component corresponding to each optical signal transmitter according to the second light intensity signal includes the following steps 401 to 402. In which:

[0097] Step 401: Acquire the acceleration signal of the object under test.

[0098] Optionally, an acceleration signal of the measured object may be acquired using an acceleration sensor, wherein the acceleration signal is a time series, and the acquisition time of the acceleration signal is the same as the acquisition time of the second light intensity signal.

[0099] Optionally, the embodiment of the present application does not limit the type of acceleration sensor in the ring-type pulse oximeter.

[0100] Step 402 : Determine the AC red light component corresponding to each optical signal transmitter based on the acceleration signal and the red light signal corresponding to each optical signal transmitter in the light intensity signal.

[0101] Optionally, for each optical signal transmitter, the AC red light component can be determined based on the acceleration signal and the corresponding red light signal, and can be determined by multiplying the acceleration signal and the red light signal in the same time period. Specifically, the AC red light component LEDiAC corresponding to the i-th optical signal transmitter is 红光 It can be expressed by the following formula:

[0102] LEDiAC 红光 =(aK n+m ×bS 1 n+m +C)-(dK n+m ×eS 1 n+m +F).

[0103] Among them, K is the acceleration signal, S 1 is the red light signal, n and m are the subscripts of the corresponding time series, a, b, c and d are the preset proportional coefficients, and C and F are constants.

[0104] Step 403 : determining the AC infrared component corresponding to each optical signal transmitter based on the infrared light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal.

[0105] Optionally, for each optical signal transmitter, the AC infrared component can be determined based on the acceleration signal and the corresponding infrared light signal, which can be determined by multiplying the acceleration signal and the infrared light signal in the same time period. Specifically, the AC infrared component LEDiAC corresponding to the i-th optical signal transmitter is 红外 It can be expressed by the following formula:

[0106] LEDiAC 红外 =(aK n+m ×bS 2 n+m +C)-(dK n+m ×eS 2 n+m +F).

[0107] Among them, K is the acceleration signal, S 2 is the infrared light signal, n+m is the subscript of the time series corresponding to it, a, b, c and d are preset proportional coefficients, and C and F are constants.

[0108] In an exemplary embodiment, the DC component includes a DC red component and a DC infrared component, such as Figure 5 As shown, optionally, determining the AC component and DC component corresponding to each optical signal transmitter according to the second light intensity signal further includes the following steps 501 to 504. In which:

[0109] Step 501 : determining a first voltage signal corresponding to each optical signal transmitter according to the red light signal corresponding to each optical signal transmitter in the light intensity signal.

[0110] Step 502: Determine a second voltage signal corresponding to each optical signal transmitter according to the infrared light signal corresponding to each optical signal transmitter in the light intensity signal.

[0111] Optionally, after determining the red light signal and the infrared light signal, since the optical signal receiver can convert the red light signal and the infrared light signal into corresponding current signals, the first voltage signal and the second voltage signal can be determined according to the corresponding current signals and the feedback resistor.

[0112] Step 503: For each optical signal transmitter, determine the corresponding DC red light component according to the average value of the first voltage signal.

[0113] Step 504: For each optical signal transmitter, determine the corresponding direct current infrared component according to the average value of the second voltage signal.

[0114] Optionally, for each optical signal transmitter, the corresponding first voltage signal can be averaged and the average value can be determined as the DC red light component. The second voltage signal can be averaged and the corresponding average value can be determined as the DC infrared component. The DC red light component corresponding to the i-th optical signal transmitter is LEDiDC 红光 and DC infrared component LEDiDC 红外 The specific formula can be determined:

[0115] LEDiDC 红光 =Mean(V 1 n ,V 1 m ).

[0116] LEDiDC 红外 =Mean(V 2 n ,V 2 m ).

[0117] Among them, V 1 is the first voltage signal, V 2 is the second voltage signal, and n and m are the subscripts of the corresponding time series.

[0118] In an exemplary embodiment, the target AC component includes a target AC red light component and a target AC infrared component, and the target DC component includes a target DC red light component and a target DC infrared component. Figure 6 As shown, optionally, determining the target AC component and the target DC component respectively according to the AC component and the DC component corresponding to each optical signal transmitter includes the following steps 601 to 604:

[0119] Step 601 : performing weighted processing on the AC red light components corresponding to each optical signal transmitter to determine a target AC red light component.

[0120] Optionally, an AC weighting coefficient corresponding to each optical signal transmitter is obtained, and then weighted processing is performed on the AC red light component corresponding to each optical signal transmitter, thereby determining the target AC red light component.

[0121] For example, taking the optical signal transmitter as two LEDs 1 and LED 2, the target AC red light component AC 红光 It can be expressed by the following formula:

[0122] AC 红光 =g×LED1AC 红光+ h×LED2AC 红光 +i.

[0123] Among them, g is the AC weighting coefficient corresponding to LED1, h is the AC weighting coefficient corresponding to LED2, and i is the preset proportional coefficient.

[0124] Step 603: Perform weighted processing on the AC infrared components corresponding to each optical signal transmitter to determine the target AC infrared component.

[0125] Optionally, an AC weighting coefficient corresponding to each optical signal transmitter is obtained, and then weighted processing is performed on the AC infrared components corresponding to each optical signal transmitter, thereby determining the target AC infrared component.

[0126] For example, taking the optical signal transmitter as two LEDs 1 and LED 2, the target AC infrared component AC 红外 It can be expressed by the following formula:

[0127] AC 红外 =g×LED1AC 红外+ h×LED2AC 红外 +i.

[0128] Step 603 : Perform weighted processing on the DC red light components corresponding to each optical signal transmitter to determine a target DC red light component.

[0129] Optionally, a DC weighting coefficient corresponding to each optical signal transmitter is obtained, and then weighted processing is performed on the DC red light component corresponding to each optical signal transmitter, thereby determining a target DC red light component.

[0130] For example, taking the optical signal transmitter as two LEDs 1 and LED 2 as an example, the target DC red light component DC 红光 It can be expressed by the following formula:

[0131] DC 红光 =j×LED1DC 红光+ k×LED2DC 红光 +l.

[0132] Among them, j is the DC weighting coefficient corresponding to LED1, k is the DC weighting coefficient corresponding to LED2, and l is the preset proportional coefficient.

[0133] Step 604 : Perform weighted processing on the DC infrared components corresponding to each optical signal transmitter to determine a target DC infrared component.

[0134] Optionally, a DC weighting coefficient corresponding to each optical signal transmitter is obtained, and then weighted processing is performed on the DC infrared component corresponding to each optical signal transmitter, thereby determining the target DC infrared component.

[0135] For example, taking the optical signal transmitter as two LEDs 1 and LED 2, the target DC infrared component DC 红外 It can be expressed by the following formula:

[0136] DC 红外 =j×LED1DC 红外+ k×LED2DC 红外 +l.

[0137] The above method can accurately determine the enhanced target AC red light component, target AC infrared component, target DC red light component and target DC infrared component, thereby accurately determining the blood oxygen value.

[0138] In an exemplary embodiment, Figure 7 As shown, optionally, determining the blood oxygen value according to the target AC component and the target DC component includes the following steps 701 to 702. In which:

[0139] Step 701 : determining a calculation factor according to a target AC red light component, a target AC infrared component, a target DC red light component, and a target DC infrared component.

[0140] Optionally, a first ratio may be determined based on the ratio of the target AC red light component to the target DC red light component, and then a second ratio may be determined based on the ratio of the target AC infrared component to the target DC infrared component. Then, a calculation factor R may be determined based on the first ratio and the second ratio, which may be expressed by the following formula:

[0141] R=AC 红光 ÷DC 红光 ÷(AC 红外 ÷DC 红外 ).

[0142] Step 702: Determine the blood oxygen value based on the square of the calculation factor and the calculation factor.

[0143] Optionally, the blood oxygen value SpO2 can be determined by the following formula:

[0144] SpO2=xR 2 +yR+z.

[0145] Among them, x, y and z are preset scale factors.

[0146] In the above method, the calculation factor is determined based on the target AC red light component, the target AC infrared component, the target DC red light component and the target DC infrared component, and the blood oxygen value is determined based on the square of the calculation factor and the calculation factor. The blood oxygen value can be determined by the second light signal with enhanced signal quality, which can improve the accuracy of the determination of the blood oxygen value.

[0147] As an optional implementation, Figure 8 As shown, the method for determining the blood oxygen value provided in the embodiment of the present application may include the following specific steps:

[0148] Step 801: Acquire a first light intensity signal received by an optical signal receiver.

[0149] Step 802 : When the signal quality of the first light intensity signal does not meet a preset condition, increase the number of activated optical signal transmitters and / or optical signal receivers.

[0150] Step 803: Acquire a second light intensity signal after the signal is enhanced and received by the optical signal receiver.

[0151] The first light intensity signal and the second light intensity signal are time series, and the second light intensity signal includes red light signals or infrared light signals received from different light signal transmitters.

[0152] Step 804: Acquire the acceleration signal of the object under test.

[0153] Step 805 : Determine the AC red light component corresponding to each optical signal transmitter based on the red light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal.

[0154] Step 806 : Determine the AC infrared component corresponding to each optical signal transmitter based on the infrared light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal.

[0155] Step 807 : Determine the first voltage signal corresponding to each optical signal transmitter according to the red light signal corresponding to each optical signal transmitter in the light intensity signal.

[0156] Step 808 : Determine a second voltage signal corresponding to each optical signal transmitter according to the infrared light signal corresponding to each optical signal transmitter in the light intensity signal.

[0157] Step 809 : For each optical signal transmitter, determine the corresponding DC red light component according to the average value of the first voltage signal.

[0158] Step 810: For each optical signal transmitter, determine the corresponding direct current infrared component according to the average value of the second voltage signal.

[0159] Step 811 : performing weighted processing on the AC red light components corresponding to the optical signal transmitters to determine a target AC red light component.

[0160] Step 812: Perform weighted processing on the AC infrared components corresponding to each optical signal transmitter to determine the target AC infrared component.

[0161] Step 813 : Perform weighted processing on the DC red light components corresponding to each optical signal transmitter to determine a target DC red light component.

[0162] Step 814 , performing weighted processing on the DC infrared components corresponding to each optical signal transmitter to determine a target DC infrared component.

[0163] Step 815 , determining a calculation factor according to the target AC red light component, the target AC infrared component, the target DC red light component, and the target DC infrared component.

[0164] Step 816: Determine the blood oxygen value based on the square of the calculation factor and the calculation factor.

[0165] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0166] Based on the same inventive concept, embodiments of the present application also provide a blood oxygen level determination device for implementing the aforementioned blood oxygen level determination method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more blood oxygen level determination device embodiments provided below can be found in the aforementioned limitations of the blood oxygen level determination method and are not further elaborated here.

[0167] In an exemplary embodiment, Figure 9 As shown, a blood oxygen value determination device 900 is provided, comprising: a first acquisition module 901, an enhancement module 902, a second acquisition module 903 and a determination module 904, wherein:

[0168] A first acquisition module 901 is configured to acquire a first light intensity signal received by an optical signal receiver;

[0169] The enhancement module 902 is configured to increase the number of optical signal transmitters and / or optical signal receivers that are turned on when the signal quality of the first optical intensity signal does not meet a preset condition;

[0170] A second acquisition module 903 is configured to acquire a second light intensity signal after the signal is enhanced and received by the optical signal receiver, wherein the first light intensity signal and the second light intensity signal are in a time series, and the second light intensity signal includes red light signals or infrared light signals received from different optical signal transmitters;

[0171] The determination module 904 is configured to determine the blood oxygen value according to the enhanced light intensity signal.

[0172] In one embodiment, the determination module 904 is specifically used to determine the AC component and DC component corresponding to each optical signal transmitter based on the second light intensity signal; determine the target AC component and target DC component respectively based on the AC component and DC component corresponding to each optical signal transmitter; and determine the blood oxygen value based on the target AC component and target DC component.

[0173] In one embodiment, the AC component includes an AC red light component and an AC infrared component, and the determination module 904 is specifically used to obtain the acceleration signal of the object under test; determine the AC red light component corresponding to each optical signal emitter based on the red light signal corresponding to each optical signal emitter in the acceleration signal and the light intensity signal; and determine the AC infrared component corresponding to each optical signal emitter based on the infrared light signal corresponding to each optical signal emitter in the acceleration signal and the light intensity signal.

[0174] In one embodiment, the DC component includes a DC red light component and a DC infrared component, and the determination module 904 is specifically used to determine the first voltage signal corresponding to each optical signal transmitter based on the red light signal corresponding to each optical signal transmitter in the light intensity signal; determine the second voltage signal corresponding to each optical signal transmitter based on the infrared light signal corresponding to each optical signal transmitter in the light intensity signal; for each optical signal transmitter, determine the corresponding DC red light component based on the average value of the first voltage signal; for each optical signal transmitter, determine the corresponding DC infrared component based on the average value of the second voltage signal.

[0175] In one embodiment, the target AC component includes a target AC red light component and a target AC infrared component, and the target DC component includes a target DC red light component and a target DC infrared component. The determination module 904 is specifically used to perform weighted processing on the AC red light components corresponding to each optical signal transmitter to determine the target AC red light component; perform weighted processing on the AC infrared components corresponding to each optical signal transmitter to determine the target AC infrared component; perform weighted processing on the DC red light components corresponding to each optical signal transmitter to determine the target DC red light component; and perform weighted processing on the DC infrared components corresponding to each optical signal transmitter to determine the target DC infrared component.

[0176] In one embodiment, the determination module 904 is specifically configured to determine a calculation factor based on the target AC red light component, the target AC infrared component, the target DC red light component, and the target DC infrared component; and determine the blood oxygen value based on the square of the calculation factor and the calculation factor.

[0177] In one embodiment, a deviation between an interval angle of each installation area on the inner circle of the ring-type pulse oximeter and a preset interval angle satisfies a preset deviation range, wherein the preset interval angle is 120°.

[0178] Each module in the aforementioned blood oxygen value determination device may be implemented in whole or in part via software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor within the ring-type pulse oximeter device in hardware form, or may be stored in a memory within the ring-type pulse oximeter device in software form, allowing the processor to call and execute corresponding operations of each module.

[0179] In an exemplary embodiment, a finger ring pulse oximeter is provided, the internal structure of which can be as follows: Figure 1 The inner ring of the ring-type pulse oximeter 10 is provided with two optical signal transmitter installation areas 110 and one receiver installation area 120. The optical signal transmitter installation area 110 includes at least one optical signal transmitter, and the receiver installation area 120 includes at least one optical signal receiver.

[0180] In an exemplary embodiment, a finger-ring pulse oximeter is provided, comprising a memory and a processor. The memory stores a computer program, and the processor implements the steps described in any of the above method embodiments when executing the computer program.

[0181] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps described in any of the above method embodiments are implemented.

[0182] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of any of the above method embodiments when executed by a processor.

[0183] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0184] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0185] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for determining a blood oxygen value, characterized in that: Used in a finger-ring pulse oximeter, wherein the inner ring of the finger-ring pulse oximeter is provided with two optical signal transmitter installation areas and one receiver installation area, wherein the optical signal transmitter installation area includes at least one optical signal transmitter, and the receiver installation area includes at least one optical signal receiver, and the method includes: Acquiring a first light intensity signal received by the optical signal receiver; When the signal quality of the first light intensity signal does not meet a preset condition, increasing the number of the optical signal transmitters and / or optical signal receivers that are turned on; Acquire a second light intensity signal after the signal is enhanced and received by the optical signal receiver, wherein the first light intensity signal and the second light intensity signal are a time series, and the second light intensity signal includes red light signals or infrared light signals received from different optical signal transmitters; The blood oxygen value is determined according to the second light intensity signal.

2. The method according to claim 1, characterized in that The determining of the blood oxygen value according to the second light intensity signal includes: Determine the AC component and DC component corresponding to each of the optical signal transmitters according to the second light intensity signal; Determine the target AC component and the target DC component respectively according to the AC component and the DC component corresponding to each of the optical signal transmitters; The blood oxygen value is determined according to the target AC component and the target DC component.

3. The method according to claim 2, characterized in that The AC component includes an AC red light component and an AC infrared component, and determining the AC component and the DC component corresponding to each of the optical signal transmitters according to the second light intensity signal includes: Obtaining the acceleration signal of the object under test; Determining the AC red light component corresponding to each optical signal transmitter according to the acceleration signal and the red light signal corresponding to each optical signal transmitter in the light intensity signal; The AC infrared component corresponding to each optical signal transmitter is determined according to the infrared light signal corresponding to each optical signal transmitter in the acceleration signal and the light intensity signal.

4. The method according to claim 3, characterized in that The DC component includes a DC red light component and a DC infrared component, and the determining of the AC component and the DC component corresponding to each of the optical signal transmitters according to the second light intensity signal further includes: determining a first voltage signal corresponding to each optical signal transmitter according to the red light signal corresponding to each optical signal transmitter in the light intensity signal; determining a second voltage signal corresponding to each optical signal transmitter according to the infrared light signal corresponding to each optical signal transmitter in the light intensity signal; For each of the optical signal transmitters, determining a corresponding DC red light component according to the average value of the first voltage signal; For each of the optical signal transmitters, a corresponding direct current infrared component is determined according to the average value of the second voltage signal.

5. The method according to any one of claims 2 to 4, characterized in that: The target AC component includes a target AC red light component and a target AC infrared component, and the target DC component includes a target DC red light component and a target DC infrared component. The target AC component and the target DC component are determined according to the AC component and the DC component corresponding to each of the optical signal transmitters, respectively, including: performing weighted processing on the AC red light components corresponding to the optical signal transmitters to determine a target AC red light component; performing weighted processing on the AC infrared components corresponding to the optical signal transmitters to determine the target AC infrared component; performing weighted processing on the DC red light components corresponding to the optical signal transmitters to determine a target DC red light component; Weighted processing is performed on the DC infrared components corresponding to the optical signal transmitters to determine the target DC infrared component.

6. The method according to claim 5, characterized in that The determining of the blood oxygen value according to the target AC component and the target DC component includes: determining a calculation factor according to the target AC red light component, the target AC infrared component, the target DC red light component, and the target DC infrared component; The blood oxygen value is determined according to the square of the calculation factor and the calculation factor.

7. The method according to claim 1, characterized in that The deviation between the interval angle of each installation area on the inner circle of the ring-type pulse oximeter and the preset interval angle meets the preset deviation range, wherein the preset interval angle is 120°.

8. A device for determining a blood oxygen value, characterized in that: The device is provided in a finger-ring pulse oximeter, wherein the inner ring of the finger-ring pulse oximeter is provided with two optical signal transmitter installation areas and one receiver installation area, wherein the optical signal transmitter installation area includes at least one optical signal transmitter, and the receiver installation area includes at least one optical signal receiver. The device comprises: A first acquisition module, configured to acquire a first light intensity signal received by the optical signal receiver; an enhancement module, configured to increase the number of activated optical signal transmitters and / or optical signal receivers when the signal quality of the first optical intensity signal does not meet a preset condition; A second acquisition module is used to acquire a second light intensity signal after the signal received by the optical signal receiver is enhanced, the first light intensity signal and the second light intensity signal are a time series, and the second light intensity signal includes a red light signal or an infrared light signal received from different optical signal transmitters; A determination module is used to determine the blood oxygen value according to the enhanced light intensity signal.

9. A finger-ring pulse oximeter comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

Images