CN114271802B - Biological information measuring apparatus - Google Patents
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- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims description 15
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- 238000005259 measurement Methods 0.000 claims description 8
- 238000010606 normalization Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 14
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- 238000000034 method Methods 0.000 description 4
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- 210000001519 tissue Anatomy 0.000 description 2
- 210000000707 wrist Anatomy 0.000 description 2
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 206010020772 Hypertension Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 208000026106 cerebrovascular disease Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000000378 dietary effect Effects 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
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- 238000013186 photoplethysmography Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
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 light with a first wavelength and light with a second wavelength are irradiated to the finger; a pressure detector for acquiring a pressure signal; and a processor 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 using the first envelope signal as a noise signal to obtain a desired signal, obtaining the product of the maximum value and the minimum value of the desired signal, and obtaining the contact part of the finger 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
The more and more people at present notice the health problem of the people, the dietary structure is changed greatly along with the continuous improvement of the living standard of the people, the occurrence of cardiovascular and cerebrovascular diseases and the death number of China are also increased continuously, wherein the death number accounts for about 40% of the total death rate of China, and the hypertension becomes a worry problem of people. Therefore, wearable blood pressure detection devices have become an urgent application product in the market. At present, devices which can be measured personally by users without assistance of doctors are basically electronic sphygmomanometers, and along with popularization of wearable health equipment, more and more health products are added with blood pressure measurement functions. Typically, the pulse wave detector is pressed by a finger to detect the blood pressure value of the user. Because the distribution of capillary vessels at different parts of the finger is different, after the pulse wave detector is pressed at different parts of the finger, the signal quantity of the finger acquired by the pulse wave detector is different, and the key characteristics of the acquired signals have larger difference, so that the final biological information measured value is influenced.
Disclosure of Invention
The embodiment of the application provides a biological information measuring device, which aims to improve the pressing habit of a user and improve the accuracy and convenience of biological information measurement through different algorithm models based on the contact part of the finger of the user with the biological information measuring device.
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 are irradiated to the finger;
a pressure detector for acquiring a pressure signal of the pressing between the finger and the pulse wave detector; and
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 a desired signal, obtaining the product of the maximum value and the minimum value of the desired signal, and obtaining the contact part of the finger 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 660nm.
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 device further comprises a display module for displaying the position of the finger of the user, which is contacted with the pulse wave detector.
And respectively carrying out normalization processing on the first envelope signal and the second envelope signal before the first envelope signal is used as a noise signal and the second envelope signal is filtered, and carrying out filtering processing on the normalized second envelope signal by using the normalized first envelope signal as the noise signal.
The maximum value of the normalized first envelope signal is K, the maximum value of the normalized second envelope signal is K, and the absolute value of the product is greater than or equal to K 2 10 and less than or equal to 3K 2 And/10, confirming that the contact part of the finger with the pulse wave detector is the middle part of the finger.
When the contact part of the finger with 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 K 2 At/10, the contact part of the finger with the pulse wave detector is determined to be the upper part of the finger, and the absolute value of the product is greater than 3K 2 And/10, confirming that the contact part of the finger with 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 the processor 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 an upper algorithm model;
when the middle part of the finger is contacted with the pulse wave detector, the processor acquires biological information of the user according to a middle part 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 the lower algorithm model.
The biological information measuring equipment also comprises a display module and a prompt module, wherein the display module is used for prompting the position of the finger, which is contacted with the pulse wave detector, of the user, and when the display module displays that the position of the finger, which is contacted with the pulse wave detector, is the upper part of the finger or the lower part of the finger, the prompt module prompts the user to press 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 contact part of the finger of the user with the pulse wave detector to correct and improve the pressing habit of the user, and further, the pulse wave detector is pressed by the middle part of the finger to acquire biological information, because the biological information acquired by the middle part of the finger is accurate and has high stability; in addition, based on the product obtained by the processor, the contact part of the finger of the user with the pulse wave detector is determined, 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 application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a biological information measuring apparatus according to 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 application;
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 of a contact between the upper part of a human finger and a pulse wave detector according to an embodiment of the present application;
fig. 5 is a schematic diagram showing a contact between the middle part of a finger of a human body and a pulse wave detector according to an embodiment of the present application;
fig. 6 is a schematic diagram of a contact between the lower part of a human finger and a pulse wave detector according to an embodiment of the present application;
fig. 7 is a schematic diagram of a normalized first envelope signal according to an embodiment of the present application;
FIG. 8 is a diagram of a normalized second envelope signal according to an embodiment of the present application;
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 by an embodiment of the present application;
fig. 11 is a schematic diagram of a wearable device to which a biological information measuring apparatus is applied according to an embodiment of the present application;
fig. 12 is a schematic diagram of another intelligent device to which the biological information measuring apparatus is applied according to the embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described 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 specification 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 the present application, the terms of orientation such as "upper", "lower", "front", "rear", etc. are defined with respect to the orientation in which the components are schematically disposed in the drawings, and it should be understood that these directional terms are relative concepts, which are used for the description and clarity of the drawings, and which may be correspondingly varied according to the variation in 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 a specified order, substantially concurrently, in reverse order, or in a different order.
Technical terms mentioned in the embodiments of the present application will be exemplarily described below:
an embodiment of the present application provides a biological information measuring apparatus.
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 detector 11 may measure a photoplethysmography pulse wave (PPG) signal (hereinafter, referred to as a "pulse wave signal") from a finger. In this case, the finger may be the upper part of the wrist or all or part of the finger.
The pressure detector 12 may acquire a pressure signal of the pressing between the finger and the pulse wave detector 11 while the pulse wave detector 11 measures the pulse wave for the user. The pressure detector 12 may include an area sensor (area sensor), a force sensor, a pressure sensor using an air bag, a strain type pressure sensor, a photo-electric pressure sensor, a moment array 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 a photodetector 112, and the light sources 111 can emit light of different wavelengths onto 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 of a first wavelength, and the second light source 1112 emits light of a second wavelength, wherein the first wavelength is different from the second wavelength. Further, the light emitted from the second light source 1112 has a second wavelength larger than the first wavelength of the light emitted from the first light source 1111. Further, the light emitted from the first light source 1111 has a first wavelength of 560nm or less, and the light emitted from the second light source 1112 has a second wavelength of 660nm or more. In the present embodiment, the first light source 1111 is a green light source which emits green light having a first wavelength, and the second light source is an infrared light source which emits infrared light having a second wavelength. Because the penetration characteristics of the infrared light and the green light are different, the penetration distance of the infrared light is larger than the penetration distance of the green light, and the infrared light and the green light have more obvious distinction degree on the key characteristics of the collected finger signals, the first pulse wave signal obtained based on the light with the first wavelength and the second pulse wave signal obtained based on the light with the second wavelength have larger difference, so that the subsequent processor 13 is convenient for processing the signals. It is understood that in other embodiments, the first light source 1111 may be other light sources, and preferably, the first wavelength range emitted by the first light source satisfies 500nm to 560nm. The second light source 1112 may be another light source, and preferably emits a second wavelength range of 750nm to 1mm.
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 the same distance from the light detector 112. It is understood that the first light source 1111 and the second light source 1112 may be disposed on different sides of the light detector 112, and the distance from the light detector 112 may be different. The photodetector 112 is used to obtain a pulse wave signal by detecting light emitted from 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 photodetector 112 is used to obtain a pulse wave signal by detecting light emitted from the light source and scattered or reflected from the finger. In this embodiment, the photodetector 112 is used to obtain a first pulse wave signal generated after the finger is irradiated with the light of the first wavelength emitted by the first light source 1111, and the photodetector 112 is used to obtain a second pulse wave signal generated after the finger is irradiated with the light of the second wavelength emitted by the second light source 1112. 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 bio-information from a user or a connected external device. When a request for measuring biological information is received, the processor 13 may generate a control signal and may control the pulse wave detector 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 from the first pulse wave signal and the pressure signal, and obtains a second envelope signal from 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 a desired signal, a product of a maximum value and a minimum value of the desired 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, light of different wavelengths has different transmission characteristics (e.g., transmission depth) from each other. The skin layer 31 is typically 0-80 μm thick, has a dense capillary distribution, contains substantially no arteries, and can absorb mainly blue light (e.g., 400-490nm wavelength) through most of the light. The dermal artery layer 32 contains a large number of arterioles, and generally, light having a wavelength greater than 500nm can reach. The reticular dermis 33 is in the middle layer of the dermis and absorbs a substantial portion of green light (e.g., 500-560nm wavelength) and yellow light (e.g., 580-595nm wavelength). The deep dermis 34 contains vascular plexus and large blood vessels, red light (e.g., with a wavelength of 605-700 nm) and infrared light (e.g., with a wavelength of 750-1 mm). The aorta layer 35 is subcutaneous tissue, contains the aorta, and is only minimally reachable by infrared light (e.g., 750nm to 1mm wavelength).
Referring to fig. 4, when the lowest part of the finger nail contour is on the same vertical line as the right edge line of the pulse wave detector 11 and the finger is laid flat on the pulse wave detector 11, it is determined that the part of the finger contacting the pulse wave detector 11 is the upper part of the finger in this state. Because the upper skin layer of the finger is thinner and mainly comprises capillaries and arterioles on the skin surface layer and the arterioles are mainly distributed on the dermal artery layer 32, the light emitted by the light source 111 reaches the optical path of the target blood vessel to be shorter, therefore, the pulse wave signals of the dermal artery layer 32 and the aortic artery layer 35 can be obtained both by infrared light with stronger penetrability (for example, the wavelength is 750 nm-1 mm) and by green light with weaker penetrability (for example, the wavelength is 500-560 nm), and after the pressure signals are combined, the obtained envelope signals are basically similar, in other words, the envelope signals obtained based on the green pulse wave signals and the pressure signals are taken as the original signals, in other words, the envelope signals obtained based on the infrared pulse wave signals and the pressure signals are taken as the noise signals, and the envelope signals obtained based on the infrared pulse wave signals and the pressure signals are filteredThe absolute value of the maximum and minimum values of the desired signal obtained is small, and therefore the absolute value of the product of the two is also small. Thus, in the present embodiment, when the absolute value of the product is smaller than K 2 At the time of/10, the contact part of the finger with the pulse wave detector was confirmed to be the upper part of the finger.
Referring to fig. 5, when the lowest part of the finger nail contour is on the same vertical line with the center line of the pulse wave detector 11 and the finger is laid flat on the pulse wave detector 11, it is determined that the part of the finger contacting 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 layer of skin tissue is higher, such as the dermal artery layer in the middle of the finger is increased compared to the thickness of the dermal artery layer in the upper part of the finger, and the deep dermis 34 has large blood vessels with a greater distribution density. Therefore, light having weak penetrability, such as green light having a first wavelength, is largely absorbed while passing through the reticular dermis 33, and does not reach the deep dermis 34, and thus pulse wave signals of large blood vessels cannot be detected. In contrast, light having a strong penetrating power, such as infrared light having a second wavelength, can reach the deep dermis 34 and even the aortic layer 35, and thus, pulse wave signals of the great vessels and even the great arteries can be acquired, thereby acquiring the envelope of the target vessel. In summary, when the biological information measuring device is pressed in the middle of the finger, the green light can only detect the pulse wave signal of the shallow blood vessel (for example, arteriole), and the infrared light can detect the pulse wave signal of the deep blood vessel (for example, macrovascular). For the above reasons, the envelope signals generated by the processor 11 based on the pulse wave signal and the pressure signal are greatly different from the finger upper part, in other words, the envelope signals obtained based on the green pulse wave signal and the pressure signal are used as noise signals, and the absolute value of the maximum value and the minimum value of the desired signals obtained after the envelope signals obtained based on the infrared pulse wave signal and the pressure signal are subjected to the filter processing is large, so the absolute value of the product of the two is also large. That is, the absolute value of the product when pressed in the middle of the finger is larger than the absolute value of the product when pressed in the upper part of the finger. In particular, the method comprises the steps of,when the absolute value of the product is greater than or equal to K 2 10 and less than or equal to 3K 2 At the time of/10, the contact part of the finger with the pulse wave detector was confirmed to be the middle part of the finger.
Referring to fig. 6, when the lowest part of the finger nail contour is on the same vertical line as the left edge line of the pulse wave detector 11 and the finger is laid flat on the pulse wave detector 11, it is determined that the part of the finger contacting the pulse wave detector 11 is the lower part of the finger in this state. Because the cortex of the lower part of the finger is thicker than the middle part of the finger and the arterial blood vessel distribution is less, compared with the middle part, light with strong penetrability, such as infrared light with a second wavelength, needs to propagate 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 signals generated by the processor 11 based on the pulse wave signal and the pressure signal have a larger difference than the finger middle, the envelope signals obtained based on the green pulse wave signal and the pressure signal are used as noise signals, and the absolute values of the maximum value and the minimum value of the expected signals obtained after the envelope signals obtained based on the infrared pulse wave signal and the pressure signal are subjected to the filter processing are larger, in other words, the absolute value of the product when the finger lower part is pressed is larger than the absolute value of the product when the finger middle is pressed. Specifically, when the absolute value of the product is greater than 3K 2 And/10, confirming that the contact part of the finger with the pulse wave detector is the lower part of the finger.
Referring to fig. 7, 8 and 9, using the biological information measuring apparatus 10, a finger presses the pulse wave detector 11, and the processor 13 obtains 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, filters the second envelope signal with the first envelope signal as a noise signal to obtain a desired signal, obtains the product of the maximum value and the minimum value of the desired signal, and obtains the contact part of the finger with the pulse wave detector according to the product.
In this embodiment, in order to further improve the filtering effect, before "filtering the second envelope signal with the first envelope signal as the noise 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 with the normalized first envelope signal as the noise signal. And obtaining a desired signal, obtaining the product of the maximum value and the minimum value of the desired signal, and obtaining the contact part of the finger with the pulse wave detector according to the product.
Specifically, the normalization processing is performed on the first envelope signal, that is, scaling the ordinate maximum value M of the first envelope signal to K, where the scaling ratio of the ordinate maximum value M of the first envelope signal is K/M, and scaling all the ordinate values of the first envelope signal except for the maximum value M by K/M times, respectively, to obtain a normalized first envelope signal, as shown in fig. 7. The normalization processing is performed on the second envelope signal, that is, scaling the maximum value N of the ordinate of the second envelope signal to K, where 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 for the maximum value N are respectively scaled by K/N times, so as to obtain a 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 (Least Mean Square, LMS), a low-pass filtering algorithm, or other algorithm, which is understood to be also possible, and the present application is not limited thereto. The processor 13 obtains the maximum value M of the desired signal 1 And a minimum value M 2 Is the absolute value of the product of (c). Specifically, in the present embodiment, the maximum value M of the desired signal 1 40, minimum value M 2 From this it can be derived that M is-27 1 And M is as follows 2 Is multiplied by (a)The absolute value of the product is |M 1 ×M 2 |= |40× (-27) |=1080. Due to K 2 /10＝100 2 /10＝1000，3K 2 /10＝3×100 2 /10＝3000。M 2 And M is as follows 1 The absolute value of the product of (c) is in a range of 1000 or more and 3000 or less, thereby confirming 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 remaining ordinate values are normalized by scaling, so that the desired signal obtained after the filtering operation contains 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 in the ordinate values of the two envelope signals 1 And a minimum value M 2 Is greatly affected by a certain envelope signal. Therefore, the present embodiment can improve the accuracy of the processor 13 to acquire the position of the finger in contact with the pulse wave detector.
By the scheme provided by the embodiment, the specific part of the finger in contact with the pulse wave detector 11 can be accurately and efficiently determined, so that the biological information data of the user can be obtained by obtaining the information of the preset contact part, and the accuracy and the reliability of the biological information data can be improved. Further, the middle part of the finger is a target area (preferred area) for collecting biological information, so that the biological information is more accurately collected in the middle part of the finger, and the obtained data is stable, thereby being beneficial to the processor 13 to calculate the biological information. When the processor 13 obtains that the portion of the finger in contact with the pulse wave detector 11 is the middle portion according to the absolute value of the product, the biological information data of the user, for example, blood pressure, heart rate, etc., can be calculated according to the first pulse wave signal, the second pulse wave signal, and the pressure signal of the compression.
When the absolute value of the product of the maximum value and the minimum value of the desired signal obtained by the processor 13 is smaller than K 2 And/10, confirming that the contact part of the finger with the pulse wave detector is the upper part of the finger, when the maximum value and the minimum value of the expected signal obtained by the processor 13 are multipliedThe absolute value of the product is greater than 3K 2 And/10, confirming that the contact part of the finger with 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 that of the previous embodiment, and will not be described here again.
Referring also to fig. 10, 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 not limited thereto.
The display module 16 may be a screen of a mobile terminal; prompt module 14 may be visually based, aurally based, or haptic based. The display module 16 is used for displaying a specific part of the finger of the user, which is in contact with the pulse wave detector 11. For example, when the display module 16 displays that the portion of the user contacting the pulse wave detector 11 is the upper portion of the finger, the prompting module 14 may prompt the user that the upper portion of the finger is contacting the pulse wave detector 11 at this time, prompt the user to make an adjustment, and press again to perform measurement until the user contacts the pulse wave detector 11 through the middle portion of the finger to accurately obtain biological information.
In this 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 portion information, and at the same time, the processor 13 calculates the biological information data of the user, such as blood pressure, heart rate, etc., from the first pulse wave signal, the second pulse wave signal, and the pressure signal of the pressing. When the specific portion of the user's finger contacting the pulse wave detector 11 is the upper portion or the lower portion of the finger, the display module 16 displays that the portion of the user contacting the pulse wave detector 11 is the upper portion or the lower portion 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: removing the finger, adjusting the position, and pressing again; the prompt module 14 vibrates nearly synchronously to prompt the user to press again or the prompt module 14 emits a specific sound effect nearly synchronously to prompt the user to press again. If the user removes his/her finger from the surface of the pulse wave detector 11 for a certain time (for example, 3 seconds), the display module 16 displays the text synchronously, for example: please press again. The user re-presses the pulse wave detector 11 after adjustment; if the user does not remove his finger from the surface of the pulse wave detector 11 within a certain time (for example, 3 seconds), the display module displays the text: for example: when the measurement fails and the measurement is repeated 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, etc., according to the first pulse wave signal, the second pulse wave signal and the pressed pressure signal. When the specific portion of the user's finger in contact with the pulse wave detector 11 is the upper or lower portion of the finger. It will be appreciated that, in other embodiments, the display manner of the display module 16 and the prompting manner of the prompting module 14 are not limited to the above manner, and other manners of displaying and prompting the user may be used, and the user may also customize according to his own preference.
It can be understood that, in other embodiments, in order to match with the pressing habit, the individuation difference, etc. of the user, after the processor 13 obtains the specific part of the finger contacting the pulse wave detector according to the absolute value of the product, the processor 13 directly forms three different data based on the absolute value of the product of the upper part, the middle part and the lower part of the finger of the tester according to the specific part of the finger contacting the pulse wave detector 11, and then processes the three different data through three different algorithm models, so as to obtain the biological information of the user. Specifically, when the portion of the user's finger in contact with the pulse wave detector 11 is the upper portion of the finger, the processor 13 acquires the biological information of the user based on the upper algorithm model; when the part of the finger of the user, which is 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 part 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. And, the performance of the built model is evaluated by using the test data set with the accurate blood pressure or heart rate of the tester, etc. as the test data. Finally, algorithm models applicable to 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 touches the pulse wave detector through the upper and lower parts of the finger, the processor 13 can accurately calculate the biological information data of the user, such as blood pressure, heart rate, etc., according to 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 rapidly and accurately judge the pressing position of the finger of the user, so that the biological information data of the user is obtained by obtaining the predetermined contact position information, and the accuracy and the reliability of the biological information data are improved. Further, 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 can be optimized.
Fig. 11 is a schematic diagram of a wearable 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 biometric information measurement device may be installed in a smart watch or smart band wearable device that may be worn on the wrist as shown herein. However, the wearable device is only an example used for ease of explanation, and should not be construed as application of the embodiments to smart watches or smart band wearable devices.
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 for measuring the biological information of the user, and may obtain an envelope through the biological information of the subject. The processor 13 may manage various types of information stored in advance in the memory 15, for example, user information such as 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 the biological information measuring apparatus is applied according to the embodiment of the present application. The various embodiments of the above-described biometric information measurement apparatus may be applied to a smart device (such as a smart phone or 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 the rear surface, the measuring surface, etc. of the main body, the present application is not particularly limited.
The pulse wave detector 11 may be exposed to the outside or embedded in the body, while the pressure detector 12 may be embedded in the body, and the processor 13 may be embedded in the body of the smart device 120. Wherein the screen of the smart device 120 can be used as the prompting module 14 for displaying prompting information to prompt the user for the pressing position. In addition, various other modules for performing many functions of the above-described bio-information measurement apparatus may be installed in the smart device 120, and a detailed description thereof will be omitted herein.
The implementation form of the biological information measuring device in the embodiment of the application can be a device, a component in a terminal, an integrated circuit or a chip. The device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a camera, a mobile phone, a tablet, a notebook, a palmtop, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and the non-mobile electronic device may be a server, a network attached storage (NetworK Attached Storage, NAS), a personal computer (personal computer, PC), a Television (TV), a teller machine, a self-service machine, etc., and the embodiments of the present application are not limited in particular.
The foregoing is merely illustrative of specific embodiments of the present application, and the present application is not limited to these embodiments, but any changes or substitutions within the technical scope of the present application should be construed as falling within 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 (9)
1. A biological information measuring apparatus, characterized in that the biological information measuring apparatus comprises:
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 irradiates the finger;
a pressure detector for acquiring a pressure signal of the pressing between the finger and the pulse wave detector; 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, respectively carrying out normalization processing on the first envelope signal and the second envelope signal, scaling a maximum value M of an ordinate of the first envelope signal to K, respectively scaling all coordinate values of the first envelope signal except the maximum value M by K/M times to obtain a normalized first envelope signal, scaling a maximum value N of an ordinate of the second envelope signal to K, respectively scaling all coordinate values of the second envelope signal except the maximum value N by K/N times to obtain a normalized second envelope signal;
taking the normalized first envelope signal as a noise signal, filtering the normalized second envelope signal to obtain a desired signal, obtaining the product of the maximum value and the minimum value of the desired signal, and obtaining the contact part of the finger with the pulse wave detector according to the product;
the absolute value of the product is greater than or equal to K 2 10 and less than or equal to 3K 2 When/10, confirming that the contact part of the finger with the pulse wave detector is the middle part of the finger;
the absolute value of the product is smaller than K 2 At/10, confirming that the contact part of the finger with the pulse wave detector is the upper part of the finger, the absolute value of the product is greater than 3K 2 When/10, confirming that the contact part of the finger with the pulse wave detector is the lower part of the finger;
the processor determines a specific part of the finger in contact with the pulse wave detector, so that biological information data of a user is obtained by obtaining predetermined contact part information.
2. The apparatus according to claim 1, wherein the light emitted from the second light source has a second wavelength that is greater than the first wavelength of the light emitted from the first light source.
3. The apparatus according to claim 1 or 2, wherein the light emitted from the first light source has a first wavelength of 560nm or less and the light emitted from the second light source has 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 bioinformation measurement device of claim 4, wherein the first wavelength range is: 500 nm-560 nm; the second wavelength range is: 750 nm-1 mm.
6. The apparatus according to claim 1, further comprising a display module for displaying a portion of the finger of the user in contact with the pulse wave detector.
7. The biological information measuring apparatus according to claim 1, wherein: when the contact part of the finger with 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.
8. The biological information measuring apparatus according to claim 1, wherein: 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 the processor 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 an upper algorithm model;
when the middle part of the finger is contacted with the pulse wave detector, the processor acquires biological information of the user according to a middle part 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;
and the upper, middle and lower algorithm models are obtained by taking the accurate blood pressure or heart rate of a tester as test data, evaluating the performance of the algorithm models by using the test data, and finally training.
9. The apparatus according to claim 7, further comprising a display module for prompting a user of a portion of the finger in contact with the pulse wave detector, and a prompting module for prompting the user to press again 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 until the apparatus obtains biological information when the middle portion of the finger presses the pulse wave detector.
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