CN114271802A - Biological information measuring apparatus - Google Patents
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Abstract
The embodiment of the application discloses biological information measuring equipment, and belongs to the technical field of electronic equipment. In the present application, a biological information measuring apparatus includes: pulse wave detector, pulse wave detector includes: the light source and the light detector are used for acquiring a first pulse wave signal and a second pulse wave signal generated after the light with the first wavelength and the light with the second wavelength irradiate the finger; a pressure detector for acquiring a pressure signal; and the processor is used for obtaining a first envelope signal according to the first pulse wave signal and the pressure signal, obtaining a second envelope signal according to the second pulse wave signal and the pressure signal, filtering the second envelope signal by taking the first envelope signal as a noise signal to obtain an expected signal, obtaining a product of a maximum value and a minimum value of the expected signal, and obtaining a part of the finger, which is in contact with the pulse wave detector, according to the product.
Description
Technical Field
The embodiment of the application relates to the technical field of electronic equipment, in particular to biological information measuring equipment.
Background
At present, more and more people pay attention to the health problem of the people, along with the continuous improvement of the living standard of the people, the dietary structure is greatly changed, the occurrence of cardiovascular and cerebrovascular diseases and the number of deaths in China are also continuously increased, wherein the proportion of the deaths to the total death rate in China even reaches about 40%, and hypertension becomes a problem which is worried about. Therefore, wearable blood pressure detecting devices have become an urgent application product in the market. At present, devices which can realize the in-person measurement of a user without the assistance of a doctor are basically electronic sphygmomanometers, and with the popularization of wearable health equipment, the function of measuring the blood pressure is added to more and more health products. Generally, the pulse wave detector is pressed by a finger to detect a blood pressure value of the user. Due to the fact that capillary vessels at different parts of the finger are distributed differently, after the pulse wave detector is pressed by the different parts of the finger, the signal quantity of the finger collected by the pulse wave detector is different, key characteristics of the obtained signals are greatly different, and therefore the final measured value of the biological information is influenced.
Disclosure of Invention
The embodiment of the application provides biological information measuring equipment, which aims to improve the pressing habit of a user, and improves the accuracy and convenience of biological information measurement through different algorithm models based on the contact part of the finger of the user and the biological information measuring equipment.
The measuring apparatus includes: a pulse wave detector comprising: the light source comprises a first light source and a second light source, the first light source emits light with a first wavelength, the second light source emits light with a second wavelength, the second wavelength is different from the first wavelength, and the light detector is used for acquiring a first pulse wave signal and a second pulse wave signal generated after the light with the first wavelength and the light with the second wavelength irradiate the finger;
a pressure detector for acquiring a pressure signal of the pressing between the finger and the pulse wave detector; and
the processor obtains a first envelope signal according to the first pulse wave signal and the pressure signal, obtains a second envelope signal according to the second pulse wave signal and the pressure signal, takes the first envelope signal as a noise signal, carries out filtering processing on the second envelope signal to obtain an expected signal, obtains a product of a maximum value and a minimum value of the expected signal, and obtains a part of the finger, which is in contact with the pulse wave detector, according to the product.
The second wavelength emitted by the second light source is greater than the first wavelength emitted by the first light source.
The first wavelength emitted by the first light source is less than or equal to 560nm, and the second wavelength emitted by the second light source is greater than or equal to 660 nm.
The first light source is green light; the second light source is infrared light.
The first wavelength range is: 500 nm-560 nm; the second wavelength range is: 750 nm-1 mm.
The biological information measuring apparatus further includes a display module for displaying a portion of the finger of the user in contact with the pulse wave detector.
Before the first envelope signal is used as a noise signal and the second envelope signal is filtered, the first envelope signal and the second envelope signal are respectively normalized, and the normalized first envelope signal is used as a noise signal and the normalized second envelope signal is filtered.
The maximum value of the normalized first envelope signal is K, the maximum value of the normalized second envelope signal is K, and the range of the absolute value of the product is greater than or equal to K 210 and 3K or less2And/10, confirming that the contact part of the finger and the pulse wave detector is the middle part of the finger.
When the contact part of the finger and the pulse wave detector is the middle part of the finger, the processor acquires the biological information data of the user according to the first pulse wave signal, the second pulse wave signal and the pressed pressure signal.
The absolute value of the product is less than K2When/10, the contact part of the finger and the pulse wave detector is confirmed to be the upper part of the finger, and the absolute value of the product is more than 3K2And/10, confirming that the contact part of the finger and the pulse wave detector is the lower part of the finger.
The processor acquires biological information of a user according to an upper part, a middle part and a lower part of the finger, which are in contact with the pulse wave detector, and comprises:
when the upper part of the finger is contacted with the pulse wave detector, the processor acquires biological information of the user according to the upper algorithm model;
when the middle part of the finger is contacted with the pulse wave detector, the processor acquires the biological information of the user according to a middle algorithm model;
when the lower part of the finger is in contact with the pulse wave detector, the processor acquires the biological information of the user according to a lower algorithm model.
The biological information measuring equipment further comprises a display module and a prompting module, wherein the display module is used for prompting the part of the finger of the user, which is contacted with the pulse wave detector, when the display module displays that the part of the user, which is contacted with the pulse wave detector, is the upper part of the finger or the lower part of the finger, the prompting module prompts the user to press the finger again until the biological information measuring equipment obtains the biological information when the middle part of the finger presses the pulse wave detector.
In the embodiment of the application, based on the product of the maximum value and the minimum value of the expected signal acquired by the processor, the prompting module prompts the part of the finger of the user, which is in contact with the pulse wave detector, to correct and improve the pressing habit of the user, so that the pulse wave detector is pressed by the middle part of the finger more to acquire biological information, because the biological information acquired by the middle part of the finger is accurate and has high stability; in addition, the part of the finger of the user, which is in contact with the pulse wave detector, is determined based on the magnitude of the product obtained by the processor, and the biological information of the user can be accurately and conveniently obtained by obtaining the biological information based on different algorithm models of the upper part, the middle part and the lower part of the finger.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of a biological information measuring apparatus provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a pulse wave detector according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a human tissue vascularity provided by an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a contact between an upper portion of a human finger and a pulse wave detector according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating a middle portion of a human finger in contact with a pulse wave detector according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating a contact between a lower portion of a human finger and a pulse wave detector according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a normalized first envelope signal according to an embodiment of the present application;
fig. 8 is a schematic diagram of a normalized second envelope signal according to an embodiment of the present disclosure;
FIG. 9 is a diagram of a desired signal provided by an embodiment of the present application;
fig. 10 is a block diagram of another biological information measuring apparatus provided in an embodiment of the present application;
fig. 11 is a schematic diagram of a wearable device to which a biological information measurement apparatus is applied according to an embodiment of the present application;
fig. 12 is a schematic diagram of another intelligent device to which a biological information measuring apparatus is applied according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In this application, the directional terms "upper", "lower", "front", "rear", and the like are defined with respect to the schematically-disposed orientation of the components in the drawings, and it is to be understood that these directional terms are relative concepts that are used for descriptive and clarity purposes and that will vary accordingly depending on the orientation in which the components are disposed in the drawings.
In addition, unless a specified order is explicitly stated in the context of the present application, the process steps described herein may be performed in a different order than specified, i.e., each step may be performed in the specified order, substantially simultaneously, in a reverse order, or in a different order.
Technical terms mentioned in the embodiments of the present application will be exemplified below:
a first aspect of embodiments of the present application provides a biological information measurement device.
Referring to fig. 1 and 2, a biological information measuring apparatus 10 includes a pulse wave detector 11, a pressure detector 12, and a processor 13.
The pulse wave measurer 11 may measure a photoplethysmography (PPG) signal (hereinafter, referred to as "pulse wave signal") from a finger. In this case, the finger may be an upper part of the wrist or all or part of the finger.
The pressure detector 12 can acquire a pressure signal of the pressing between the finger and the pulse wave detector 11 while the pulse wave measurer 11 measures the pulse wave to the user. The pressure detector 12 may include an area sensor (area sensor), a force sensor, a pressure sensor using a balloon, a strain gauge pressure sensor, a photoelectric pressure sensor, a moment matrix sensor, a strain gauge, or the like, but the pressure detector 12 is not limited thereto.
In the present embodiment, the pulse wave detector 11 includes two or more light sources 111 and light detectors 112, and the light sources 111 can emit light with different wavelengths to a pressing object (not shown), such as a finger. In the present embodiment, the light source 111 includes a first light source 1111 and a second light source 1112. The first light source 1111 emits light at a first wavelength and the second light source 1112 emits light at a second wavelength, wherein the first wavelength is different from the second wavelength. Further, the second light source 1112 emits light having a second wavelength that is greater than the first wavelength of the light emitted by the first light source 1111. Further, the first light source 1111 emits light having a first wavelength of 560nm or less, and the second light source 1112 emits light having a second wavelength of 660nm or more. In the present embodiment, the first light source 111 is a green light source that emits green light having a first wavelength, and the second light source is an infrared light source that emits infrared light having a second wavelength. Because the infrared light and the green light have different penetration characteristics, the penetration distance of the infrared light is greater than that of the green light, and the infrared light and the green light have more obvious discrimination on key features for collecting finger signals, a first pulse wave signal acquired based on the light with the first wavelength and a second pulse wave signal acquired based on the light with the second wavelength have larger difference, so that the subsequent processor 13 can conveniently process the signals. It is understood that in other embodiments, the first light source 1111 may be other light sources, and preferably emits the first wavelength range satisfying 500nm to 560 nm. The second light source 1112 may be other light sources, and preferably emits light having a second wavelength ranging from 750nm to 1 mm.
In the present embodiment, the first light source 1111 and the second light source 1112 are disposed on the same side of the light detector 112, which is at the same distance from the light detector 112. It is to be understood that the first light source 1111 and the second light source 1112 may also be disposed on different sides of the light detector 112, and may also be at different distances from the light detector 112. The light detector 112 is used to obtain a pulse wave signal by detecting light emitted by the light source and scattered or reflected from the finger. The photodetector 112 may be a photoelectric conversion element such as a Photodiode (PD), a phototransistor, an avalanche photodiode, or a photomultiplier tube. The light detector 112 is used to obtain a pulse wave signal by detecting light emitted by the light source and scattered or reflected from the finger. In this embodiment, the light detector 112 is used to obtain a first pulse wave signal generated after the light with the first wavelength emitted by the first light source 1111 is irradiated to the finger, and the light detector 112 is used to obtain a second pulse wave signal generated after the light with the second wavelength emitted by the second light source 1112 is irradiated to the finger. The photodetector 112 may be a photoelectric conversion element such as a Photodiode (PD), a phototransistor, an avalanche photodiode, or a photomultiplier tube.
The processor 13 may receive a request for measuring biometric information from a user or a connected external device. When receiving a request for measuring the biological information, the processor 13 may generate a control signal and may control the pulse wave measurer 11 and the pressure detector 12. The processor 13 may be electrically connected to the pulse wave detector 11 and the pressure detector 12.
Specifically, the processor 13 obtains a first envelope signal according to the first pulse wave signal and the pressure signal, and obtains a second envelope signal according to the second pulse wave signal and the pressure signal. In this embodiment, the first envelope signal is used as a noise signal, the second envelope signal is filtered to obtain an expected signal, a product of a maximum value and a minimum value of the expected signal is obtained, and a portion of the finger in contact with the pulse wave detector is obtained according to the product.
Referring to fig. 3, the different wavelengths of light have different penetration characteristics (e.g., penetration depths) from each other. The epidermal layer 31 is typically 0-80 μm thick, has a dense distribution of capillaries, is substantially free of arteries, and can pass most light while absorbing primarily blue light (e.g., 400-490nm wavelength). The dermal artery layer 32 contains a large number of arterioles, generally, accessible to light having a wavelength of greater than 500 nm. The reticular dermis 33 is located in the middle of the dermis and can absorb most of the green light (e.g., wavelength of 500-560nm) and yellow light (e.g., wavelength of 580-595 nm). The deep dermis 34, which contains the plexus of blood vessels and large blood vessels, red light (e.g., wavelength of 605-700 nm) and infrared light (e.g., wavelength of 750-1 mm). The aortic layer 35 is subcutaneous tissue, containing the aorta, and only a small amount of infrared light (e.g., 750nm to 1mm in wavelength) can reach.
Referring to fig. 4, when the lowest portion of the finger nail is on the same vertical line as the right edge line of the pulse wave detector 11 and the finger is laid on the pulse wave detector 11, it is determined that the portion of the finger contacting the pulse wave detector 11 is the upper portion of the finger in this state. Since the skin layer on the upper portion of the finger is thin, mainly capillary vessels and arterioles on the skin surface layer are used, the arterioles are mainly distributed on the dermal artery layer 32, and the optical path of light emitted by the light source 111 reaching the target blood vessel is short, so that pulse wave signals of the dermal artery layer 32 and the aortic layer 35 can be obtained no matter infrared light with strong penetration capacity (for example, the wavelength is 750 nm-1 mm) or green light with weak penetration capacity (for example, the wavelength is 500-560nm), and after the envelope signals obtained by combining the pressure signals are basically similar, in other words, as original signals, envelope signals obtained based on the green pulse wave signals and the pressure signals are used as noise signals, and after the envelope signals obtained based on the infrared pulse wave signals and the pressure signals are subjected to filtering processing, the absolute values of the maximum value and the minimum value of the obtained desired signals are small, therefore, the absolute value of the product of the two is also small. Therefore, in this embodiment, when the absolute value of the product is less than K2And/10, confirming that the contact part of the finger and the pulse wave detector is the upper part of the finger.
Referring to fig. 5, when the lowest part of the outline of the finger nail is on the same vertical line as the center line of the pulse wave detector 11 and the finger is laid on the pulse wave detector 11, it is determined that the contact part of the finger and the pulse wave detector 11 is the middle part of the finger in this state. Since the skin layer in the middle of the finger is thicker than the skin layer in the upper part of the finger, the thickness of each skin tissue layer is higher, such as the dermal artery layer in the middle of the finger is increased compared to the dermal artery layer in the upper part of the finger, and the deep dermis 34 has a larger distribution density of large blood vessels. Therefore, light with weak penetration ability, such as green light with the first wavelength, is absorbed in a large amount while passing through the reticular dermis 33, and cannot reach the deep dermis 34, and a pulse wave signal of a large blood vessel cannot be detected. In contrast, the light with stronger penetration ability, such as the infrared light with the second wavelength, can reach the deep dermis 34, and even reach the aorta layer 35, so that the pulse wave signal of the great vessels, even the great arteries, can be collected, and the envelope of the target vessels can be obtained. In summary, when the biological information measuring device is pressed at the middle of the finger, the green light can only detect the lightPulse wave signals of superficial vessels (e.g., arterioles), while pulse wave signals of deep vessels (e.g., great vessels) can be detected by infrared light. For the above reasons, the envelope signal generated by the processor 11 based on the pulse wave signal and the pressure signal has a larger difference from the upper part of the finger, in other words, the envelope signal obtained based on the green pulse wave signal and the pressure signal is used as the noise signal, and after the envelope signal obtained based on the infrared pulse wave signal and the pressure signal is filtered, the absolute value of the maximum value and the minimum value of the desired signal is larger, and therefore, the absolute value of the product of the two is also larger. That is, the absolute value of the product when the middle of the finger is pressed is larger than the absolute value of the product when the upper of the finger is pressed. Specifically, when the range of the absolute value of the product is equal to or greater than K 210 and 3K or less2And 10, confirming that the contact part of the finger and the pulse wave detector is the middle part of the finger.
Referring to fig. 6, when the lowest part of the outline of the finger nail is on the same vertical line as the left edge line of the pulse wave detector 11 and the finger is laid on the pulse wave detector 11, it is determined that the part of the finger in contact with the pulse wave detector 11 in this state is the lower part of the finger. Because the cortex of the lower part of the finger is thicker than the middle part of the finger and the artery blood vessels are less distributed, compared with the middle part, the light with strong penetrating power, such as infrared light with a second wavelength, needs to spread a longer optical path to reach the target blood vessel, and simultaneously, the pressing force required for blocking the blood vessel is greatly enhanced. For the above reasons, the envelope signal generated by the processor 11 based on the pulse wave signal and the pressure signal has a larger difference compared to the middle of the finger, and after the envelope signal obtained based on the green light pulse wave signal and the pressure signal is used as the noise signal and the envelope signal obtained based on the infrared light pulse wave signal and the pressure signal is filtered, the absolute value of the maximum value and the minimum value of the desired signal is larger, in other words, the absolute value of the product when the lower part of the finger is pressed is larger than the absolute value of the product when the middle part of the finger is pressed. In particular, when the absolute value of the product is greater than 3K2/10 confirmation of finger and pulse wave detectionThe contact part of the detector is the lower part of the finger.
Referring to fig. 7, 8 and 9, with the biological information measuring device 10, the pulse wave detector 11 is pressed by a finger, and the processor 13 acquires a portion of the finger in contact with the pulse wave detector 11 based on information detected by the pulse wave detector 11 and the pressure detector 12. The first light source 1111 is a green light source, and the second light source 1112 is an infrared light source. Specifically, the processor 13 obtains a first envelope signal according to the first pulse wave signal and the pressure signal, the processor 13 obtains a second envelope signal according to the first pulse wave signal and the pressure signal, the first envelope signal is used as a noise signal, the second envelope signal is subjected to filtering processing to obtain an expected signal, a product of a maximum value and a minimum value of the expected signal is obtained, and a part of the finger contacting the pulse wave detector is obtained according to the product.
In this embodiment, in order to further improve the filtering effect, before "taking the first envelope signal as the noise signal and performing filtering processing on the second envelope signal", normalization processing is performed on the first envelope signal and the second envelope signal respectively, and filtering processing is performed on the normalized second envelope signal by taking the normalized first envelope signal as the noise signal. Obtaining an expected signal, obtaining the product of the maximum value and the minimum value of the expected signal, and obtaining the contact part of the finger and the pulse wave detector according to the product.
Specifically, the normalization processing on the first envelope signal means that the maximum value M of the ordinate of the first envelope signal is scaled to K, the scaling ratio of the maximum value M of the ordinate of the first envelope signal is K/M, and all the ordinate values of the first envelope signal except the maximum value M are scaled by K/M times, respectively, so as to obtain the normalized first envelope signal, as shown in fig. 7. The normalization processing of the second envelope signal means that the maximum value N of the ordinate of the second envelope signal is scaled to K, the scaling ratio of the maximum value N of the ordinate of the second envelope signal is K/N, and all the ordinate values of the second envelope signal except the maximum value N are scaled by K/N times, respectively, so as to obtain the normalized second envelope signal, as shown in fig. 8.
Referring to fig. 9, the processor 13 uses the normalized first envelope signal as a noise signal, and performs filtering processing on the normalized second envelope signal to obtain a desired signal. The filtering algorithm may be an adaptive filtering algorithm (LMS), a low-pass filtering algorithm, or other filtering algorithms, and it should be understood that the present application is not limited thereto. The processor 13 obtains the maximum value M of the desired signal1And minimum value M2Absolute value of the product of (a). Specifically, in the present embodiment, the maximum value M of the desired signal1Is 40, the minimum value M2Is-27, from which it can be derived that M1And M2Absolute value of the product of1×M2I 40 × (-27) | 1080. Due to K2/10＝1002/10＝1000，3K2/10＝3×1002/10＝3000。M2And M1The absolute value range of the product of (a) and (b) is 1000 to 3000 inclusive, and it is confirmed that the contact portion of the finger with the pulse wave detector is the middle portion of the finger.
In this embodiment, the maximum value M of the first envelope signal and the maximum value N of the second envelope signal are scaled to the same maximum value K, and the normalization processing of scaling the remaining ordinate values makes it possible to make the desired signal obtained after the filtering operation include the waveform information of the first envelope signal and the second envelope signal at the same time, without causing the maximum value M of the desired signal obtained after the filtering operation due to an excessively large difference between the ordinate values of the two envelope signals1And minimum value M2Affected by the fact that some of the envelope signals are too large. Therefore, the present embodiment can improve the accuracy of the processor 13 in acquiring the portion of the finger in contact with the pulse wave detector.
Through the scheme provided by the embodiment, the specific contact part of the finger and the pulse wave detector 11 can be accurately and efficiently determined, so that the biological information data of the user can be acquired by acquiring the preset contact part information, and the accuracy and reliability of the biological information data are improved. Further, the middle part of the finger is a target area (preferred area) for acquiring the biological information, the acquisition of the biological information in the middle part of the finger is more accurate, and the acquired data is stable, which is beneficial for the processor 13 to calculate the biological information. When the processor 13 obtains that the portion of the finger contacting the pulse wave detector 11 is the middle portion according to the absolute value of the product, the biological information data of the user, such as blood pressure, heart rate, etc., can be calculated according to the first pulse wave signal, the second pulse wave signal, and the pressed pressure signal.
When the absolute value of the product of the maximum value and the minimum value of the desired signal acquired by the processor 13 is less than K2And/10, confirming that the contact part of the finger and the pulse wave detector is the upper part of the finger, and when the absolute value of the product of the maximum value and the minimum value of the expected signal acquired by the processor 13 is more than 3K2And/10, confirming that the contact part of the finger and the pulse wave detector is the lower part of the finger. The process of obtaining the absolute value of the product is the same as the previous embodiment, and is not described herein again.
Referring to fig. 10 together, the biological information measuring apparatus 10 further includes a prompt module 14, a memory 15, and a display module 16. The memory 15 is used for storing data, and may include at least one of the following storage media: flash memory type memory, hard disk type memory, multimedia card micro memory, card type memory (e.g., SD memory, XD memory, etc.), Random Access Memory (RAM), Static Random Access Memory (SRAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Programmable Read Only Memory (PROM), magnetic memory, magnetic disk, and optical disk, but are not limited thereto.
The display module 16 may be a screen of the mobile terminal; the prompting module 14 may be visually, audibly, or haptically based. The display module 16 is used for displaying the specific part of the user's finger contacting the pulse wave detector 11. For example, when the display module 16 displays that the part of the user contacting the pulse wave detector 11 is the upper part of the finger, the prompt module 14 may prompt the user that the upper part of the finger is contacting the pulse wave detector 11 and prompt the user to make an adjustment and to press again for measurement until the user contacts the pulse wave detector 11 through the middle part of the finger to accurately obtain the biological information.
In the present embodiment, specifically, when the specific portion of the finger of the user contacting the pulse wave detector 11 is the middle portion of the finger, the display module 16 displays middle information, and the processor 13 calculates biological information data of the user, such as blood pressure, heart rate, and the like, according to the first pulse wave signal, the second pulse wave signal, and the pressed pressure signal. When the specific part of the user's finger contacting the pulse wave detector 11 is the upper part or the lower part of the finger, the display module 16 displays that the part of the user contacting the pulse wave detector 11 is the upper part or the lower part of the finger, respectively, and the specific icon on the screen of the display module 16 swings left and right and displays characters, for example: please remove the finger, adjust the position and press again; the module 14 is prompted to vibrate approximately synchronously, prompting the user to press again or the module 14 is prompted to sound a particular sound effect approximately synchronously, prompting the user to press again. If the user removes the finger from the surface of the pulse wave detector 11 within a specific time (e.g., 3 seconds), the display module 16 synchronously displays text, such as: please press again. The user presses the pulse wave detector 11 again after adjustment; if the user does not remove the finger from the surface of the pulse wave detector 11 within a certain time (e.g., 3 seconds), the display module displays the text: for example: when the measurement fails, please re-measure until the specific part of the finger of the user contacting the pulse wave detector 11 is the middle part of the finger, the prompting module 14 does not prompt any more, and the processor 13 calculates the biological information data of the user, such as blood pressure, heart rate and the like, according to the first pulse wave signal, the second pulse wave signal and the pressing pressure signal. When the specific portion of the user's finger that is in contact with the pulse wave detector 11 is the upper or lower portion of the finger. It should be understood that, in other embodiments, the display mode of the display module 16 and the prompt mode of the prompt module 14 are not limited to the above modes, and other modes may be used to display and prompt the user, and the user may also perform personalized customization according to his/her preference.
It is understood that, in other embodiments, in order to match the pressing habits, individualization differences, etc. of the user, after the processor 13 obtains the specific portion of the finger contacting the pulse wave detector according to the absolute value of the product, the processor 13 forms three different data respectively directly based on the absolute values of the products of the upper portion, the middle portion, and the lower portion of the finger of the tester according to the specific portion of the finger contacting the pulse wave detector 11, and then processes the three different data respectively through three different algorithm models, thereby obtaining the biological information of the user. Specifically, when the part of the user's finger in contact with the pulse wave detector 11 is the upper part of the finger, the processor 13 acquires the biological information of the user based on the upper algorithm model; when the part of the user's finger in contact with the pulse wave detector 11 is the middle part of the finger, the processor 13 acquires the biological information of the user based on the middle algorithm model; when the portion of the user's finger in contact with the pulse wave detector 11 is the lower portion of the finger, the processor 13 acquires the biological information of the user based on the lower algorithm model. The performance of the constructed model is evaluated by using the test data set with the accurate blood pressure or heart rate of the tester as test data. Finally, an algorithm model for the upper, middle and lower parts of the finger can be trained for obtaining the blood pressure or heart rate of the user. Thus, even if the user contacts the pulse wave detector through the upper and lower portions of the finger, the processor 13 can accurately calculate the biological information data of the user, such as blood pressure, heart rate, etc., from the stored algorithm model. The embodiment can further improve the accuracy and convenience of biological information acquisition.
The biological information measuring equipment provided by the embodiment of the application can quickly and accurately judge the pressing position of the finger of the user, so that the biological information data of the user can be acquired by acquiring the preset contact part information, and the accuracy and the reliability of the biological information data are improved. Furthermore, by judging the pressing position of the finger of the user, the bad pressing habit of the user can be corrected, and finally the pressing condition of the user is optimal.
Fig. 11 is a schematic diagram of a wearable device to which a biological information measurement apparatus is applied according to an embodiment of the present application. The various embodiments of the biological information measuring apparatus described above may be installed in a smart watch or a smart band type wearable device wearable on a wrist as shown here. However, the wearable device is only an example used for convenience of explanation, and should not be construed that the application of the embodiments is limited to a smart watch or a smart band type wearable device.
Referring to fig. 11, the wearable device 110 includes a key 111, and the pulse wave detector 11 and the pressure detector 12 may be integrated in the key 111, for example, the pulse wave detector 11 and the pressure detector 12 are stacked. The processor 13 may control the pulse wave detector 11 and the pressure detector 12 to acquire biological information of the subject by generating a control signal according to a request to measure the biological information of the user, and may obtain the envelope through the biological information of the subject. The processor 13 may manage various types of information pre-stored in the memory 15, for example, user information such as the age, sex, height, weight, and/or health status of the subject. Also, the processor 13 may manage the generated information in the memory 15.
Fig. 12 is a schematic diagram of another intelligent device to which a biological information measuring apparatus is applied according to an embodiment of the present application. The various embodiments of the above-described biological information measuring apparatus may be applied to a smart device (such as a smart phone or a tablet PC).
Referring to fig. 12, the smart device 120 includes a module 121 mounted on a main body of the smart device 120. The module 121 may be exposed on the surface of the screen, or may be under the screen, or on the rear surface and the side surface of the main body, etc., and the present application is not particularly limited.
The pulse wave detector 11 may be exposed to the outside or embedded in the main body, while the pressure detector 12 may be embedded in the main body, and the processor 13 may be embedded in the main body of the smart device 120. Wherein the screen of the smart device 120 can be used as the prompt module 14 for displaying prompt information to prompt the user of the pressing position. In addition, various other modules for performing many functions of the above-described biological information measuring apparatus may be installed in the smart device 120, and a detailed description thereof is omitted herein.
The biological information measuring device in the embodiment of the present application may be implemented as a device, or may be a component, an integrated circuit, or a chip in a terminal. The device can be mobile electronic equipment or non-mobile electronic equipment. Illustratively, the mobile electronic device may be a camera, a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a NetworK Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
The above is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (12)
1. A biological information measuring apparatus characterized by comprising:
a pulse wave detector comprising: the light source comprises a first light source and a second light source, the first light source emits light with a first wavelength, the second light source emits light with a second wavelength, the second wavelength is different from the first wavelength, and the light detector is used for acquiring a first pulse wave signal and a second pulse wave signal generated after the light with the first wavelength and the light with the second wavelength irradiate the finger;
a pressure detector for acquiring a pressure signal of a press between the finger and the pulse wave detector; and
the processor obtains a first envelope signal according to the first pulse wave signal and the pressure signal, obtains a second envelope signal according to the second pulse wave signal and the pressure signal, performs filtering processing on the second envelope signal by taking the first envelope signal as a noise signal to obtain an expected signal, obtains a product of a maximum value and a minimum value of the expected signal, and obtains a part of the finger, which is in contact with the pulse wave detector, according to the product.
2. The biological information measuring apparatus according to claim 1, wherein the second light source emits light having a second wavelength that is larger than a first wavelength of the light emitted by the first light source.
3. The biological information measuring apparatus according to claim 1 or 2, wherein the first light source emits light having a first wavelength of 560nm or less, and the second light source emits light having a second wavelength of 660nm or more.
4. The biological information measuring apparatus according to claim 1 or 2, wherein the first light source is a green light source; the second light source is an infrared light source.
5. The biological information measuring apparatus according to claim 4, wherein the first wavelength range is: 500 nm-560 nm; the second wavelength range is: 750 nm-1 mm.
6. The biological information measuring apparatus according to claim 1, further comprising a display module for displaying a portion of the finger of the user which is in contact with the pulse wave detector.
7. The biological information measuring apparatus according to claim 1, wherein the first envelope signal and the second envelope signal are normalized before the first envelope signal is used as the noise signal and the second envelope signal is subjected to the filter processing, respectively, and the normalized first envelope signal is used as the noise signal and the normalized second envelope signal is subjected to the filter processing.
8. The biological information measuring apparatus according to claim 7, characterized in that: the maximum value of the normalized first envelope signal is K, the maximum value of the normalized second envelope signal is K, and the range of the absolute value of the product is greater than or equal to K210 and 3K or less2And/10, confirming that the contact part of the finger and the pulse wave detector is the middle part of the finger.
9. The biological information measuring apparatus according to claim 8, characterized in that: and when the contact part of the finger and the pulse wave detector is the middle part of the finger, the processor acquires biological information data of the user according to the first pulse wave signal, the second pulse wave signal and the pressed pressure signal.
10. The biological information measuring apparatus according to claim 8, characterized in that: the absolute value of the product is less than K2And/10, confirming that the contact part of the finger and the pulse wave detector is the upper part of the finger, wherein the absolute value of the product is more than 3K2And/10, confirming that the contact part of the finger and the pulse wave detector is the lower part of the finger.
11. The biological information measuring apparatus according to claim 10, characterized in that: the processor acquires biological information of a user according to an upper part, a middle part and a lower part of the finger, which are in contact with the pulse wave detector, and includes:
when the upper part of the finger is in contact with the pulse wave detector, the processor acquires biological information of the user according to an upper algorithm model;
when the middle part of the finger is in contact with the pulse wave detector, the processor acquires biological information of the user according to a middle algorithm model;
when the lower part of the finger is in contact with the pulse wave detector, the processor acquires biological information of the user according to a lower algorithm model.
12. The biological information measuring apparatus according to claim 10, further comprising a display module and a prompting module, wherein the display module is configured to prompt a user of a portion of the finger in contact with the pulse wave detector, and when the display module displays that the portion of the user in contact with the pulse wave detector is an upper portion of the finger or a lower portion of the finger, the prompting module prompts the user to press again until the biological information measuring apparatus obtains biological information when the middle portion of the finger presses the pulse wave detector.
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