CN116491940A - Cerebral blood oxygen saturation and frontal temperature integrated gun type detection method - Google Patents
Cerebral blood oxygen saturation and frontal temperature integrated gun type detection method Download PDFInfo
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 107
- 239000001301 oxygen Substances 0.000 title claims abstract description 107
- 239000008280 blood Substances 0.000 title claims abstract description 101
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- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 230000002490 cerebral effect Effects 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 51
- 238000012544 monitoring process Methods 0.000 claims abstract description 48
- 210000001061 forehead Anatomy 0.000 claims abstract description 36
- 230000036760 body temperature Effects 0.000 claims abstract description 31
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- 238000004364 calculation method Methods 0.000 claims abstract description 7
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- 108010054147 Hemoglobins Proteins 0.000 claims description 10
- 102000001554 Hemoglobins Human genes 0.000 claims description 10
- 210000004556 brain Anatomy 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 claims description 7
- 101100366935 Caenorhabditis elegans sto-2 gene Proteins 0.000 claims description 6
- 108010064719 Oxyhemoglobins Proteins 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- INGWEZCOABYORO-UHFFFAOYSA-N 2-(furan-2-yl)-7-methyl-1h-1,8-naphthyridin-4-one Chemical compound N=1C2=NC(C)=CC=C2C(O)=CC=1C1=CC=CO1 INGWEZCOABYORO-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 108010002255 deoxyhemoglobin Proteins 0.000 claims description 4
- 230000005678 Seebeck effect Effects 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 3
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
- A61B5/14553—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases specially adapted for cerebral tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
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- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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Abstract
The invention provides a cerebral blood oxygen saturation and frontal temperature integrated gun type detection method, which comprises a micro-processing unit, an infrared temperature detection unit and a cerebral blood oxygen detection unit, wherein the infrared temperature detection unit and the cerebral blood oxygen detection unit are connected with the micro-processing unit; the infrared temperature detection unit comprises an infrared temperature sensor and is used for detecting the temperature of a part to be detected; the blood oxygen detection unit is a core module of the invention, and specifically comprises a photosensitive detector and a near infrared light source, and is used for detecting the blood oxygen concentration of a part to be detected; the micro-processing unit is used for receiving physiological parameter signals of the part to be detected transmitted by the infrared temperature sensor or the photosensitive detector. The invention has the beneficial effects that: the near infrared noninvasive monitoring method is adopted to monitor the cerebral blood oxygen saturation in real time, combines self-created two-channel and multi-channel algorithm measurement and calculation which are tightly overlapped, is integrated with the forehead temperature monitoring module, solves the problem of single function of the monitoring equipment such as the forehead temperature gun and the like, and meets the urgent requirements of the current market on high-sensitivity monitoring of physiological parameters such as the body temperature, the cerebral blood oxygen saturation and the like.
Description
Technical Field
The invention belongs to the field of medical equipment, and particularly relates to a cerebral blood oxygen saturation and frontal temperature integrated gun type detection method.
Background
The disease has triggered people to the attention of physiological parameter index monitoring such as body temperature, blood oxygen saturation, etc. an urgent need in the market is a body temperature and blood oxygen monitoring instrument that quick measurement, convenient reading, suitability are strong, the current common body temperature monitoring instrument in domestic market such as forehead temperature rifle etc. can satisfy people's basic demand to body temperature monitoring, blood oxygen saturation monitoring also can be monitored through some special medical instrument, cell-phone APP, intelligent bracelet etc. but for the monitoring demand of body temperature and blood oxygen in a large number at present, an integrated monitoring instrument that can satisfy body temperature and blood oxygen simultaneously is urgently needed to the requirement cost is lower relatively, small can satisfy people daily carry demand, convenient to use is quick, be applicable to family monitoring version etc..
At present, some patents can realize simultaneous measurement of blood oxygen saturation and body temperature, but the applicability of the technology is uneven, most of the technologies are relatively large and inconvenient to carry, or industrialization popularization is not achieved because some technologies are not mature, or the measurement precision and the measurement of the sensitivity to the change of related physiological parameter indexes lack strict algorithm support, and only the measured data of a human body can be roughly displayed.
The blood oxygen saturation (StO 2) of brain tissue can well reflect the health condition of a human body, and some researches show that near infrared spectroscopy (NIRS) calculates molecular composition information of local tissues by obtaining signals of near infrared light after diffuse reflection and absorption of the near infrared light through superficial tissues of the human body, so that the method is very effective in measuring the concentration of hemoglobin of the human body, and the technology can realize noninvasive and rapid measurement.
Disclosure of Invention
In view of the above, the present invention aims to provide a cerebral blood oxygen saturation and forehead temperature integrated gun type detection method and apparatus, which can simultaneously realize two functions on one apparatus, and provide various mode selections such as oxygen-containing hemoglobin concentration measurement, blood oxygen saturation measurement, forehead body temperature measurement, etc., and eliminate environmental factors and relative errors measured at different positions through algorithms; the instrument has the advantages of simple structure, low cost and convenience for household operation.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the cerebral blood oxygen saturation and forehead temperature integrated gun type detecting instrument comprises a micro-processing unit, an infrared temperature detecting unit and a blood oxygen detecting unit, wherein the infrared temperature detecting unit and the blood oxygen detecting unit are connected with the micro-processing unit;
the infrared temperature detection unit comprises an infrared temperature sensor and is used for detecting the temperature of a part to be detected;
the blood oxygen detection unit comprises a photosensitive detector and a near infrared light source and is used for detecting the blood oxygen concentration of a part to be detected;
the micro-processing unit is used for receiving physiological parameter signals of the part to be detected transmitted by the infrared temperature sensor or the photosensitive detector.
Further, the micro-processing unit integrates an A/D conversion circuit to convert the received analog signal into a digital signal;
the micro-processing unit integrates a precise operational amplifier circuit to realize temperature sensitive induction of millivolt level and accurate blood oxygen change monitoring.
Further, the infrared temperature sensor adopts a thermopile pyroelectric infrared sensor, the measured local temperature value is captured by utilizing the Seebeck effect, the measuring temperature range is required to be 32-42 ℃, and the measuring voltage sensitivity is not lower than 50 mV/DEG C.
Furthermore, the photosensitive detector is a photosensitive detector sensitive to 700-900nm wave band, a pre-signal amplifier is integrated in the photosensitive detector, the photoelectric sensitivity of the detector circuit is adjusted by changing the gain of the amplifier, and the same function can be realized by a signal amplifying circuit;
the light source is a two-wavelength LED light source, one wavelength range is 650nm-800nm, the other wavelength range is 800nm-900nm, and the preferable ranges of the two wavelengths are 730nm-780nm and 810nm-860nm respectively;
the installation distance between the light source and the blood oxygen photosensitive detector and the infrared temperature sensor is 2.5-3.0cm.
Furthermore, during measurement, the front ends of the infrared temperature sensor and the photosensitive detector of blood oxygen are in contact measurement or non-contact measurement with the part to be measured.
Further, a control panel is also arranged, and a plurality of function selection button groups are embedded in the key panel, wherein the function selection button groups comprise a blood oxygen selection button group and a body temperature selection button group;
the function selection button is used for realizing function switching of blood oxygen saturation monitoring or body temperature monitoring, and single measurement realizes a single function, so that mutual interference caused by light with different wavelengths is avoided;
the monitoring of the blood oxygen saturation can select the measurement of parameters such as the concentration of oxyhemoglobin or the blood oxygen saturation, the emission wavelength of a corresponding light source of the oxyhemoglobin measurement is 750nm, and the corresponding wavelength of the deoxyhemoglobin measurement is 900nm;
the body temperature monitoring can be carried out by selecting the temperature of celsius degrees/Fahrenheit degrees according to the requirement, and the error value is compensated by different parts through an algorithm.
Further, the scheme discloses a cerebral blood oxygen saturation and frontal temperature integrated gun type detection method, and the blood oxygen saturation measurement method is as follows:
with one light source and two or more photosensitive detectors,
or (b)
Two or more light sources and a photosensitive detector are used,
analyzing the optical measurement physical quantity of continuous wave based on the principle of micro-differentiation by utilizing the outgoing light intensity of forehead tissue detected by two or more detection channels to obtain the absolute concentration value measurement and calculation of forehead oxygen-containing or deoxidized hemoglobin, and converting the absolute concentration value measurement and calculation into the blood oxygen saturation (StO) 2 ) As a final reading result, a blood oxygen saturation (StO 2 ) The calculation algorithm is as follows:
wherein HbO is 2 And Hb are the oxygenated and deoxygenated hemoglobin concentrations, respectively.
Further, the scheme discloses electronic equipment, which comprises a processor and a memory which is in communication connection with the processor and is used for storing executable instructions of the processor, wherein the processor is used for executing the cerebral blood oxygen saturation and frontal temperature integrated gun type detection method.
Further, the present solution discloses a computer readable storage medium storing a computer program, which when executed by a processor, implements a cerebral blood oxygen saturation and frontal temperature integrated gun type detection method.
Compared with the prior art, the cerebral blood oxygen saturation and frontal temperature integrated gun type detection method and instrument have the following beneficial effects:
the brain blood oxygen saturation and forehead temperature integrated gun type detection method and instrument integrate the forehead temperature gun temperature monitor and forehead lobe brain tissue blood oxygen saturation monitoring function, innovatively adopts a double-channel and multi-channel algorithm with tightly overlapped near infrared spectrums, analyzes the optical measurement physical quantity of continuous waves based on a micro-differential principle to obtain absolute concentration value measurement and calculation of forehead oxygen-containing or deoxidized hemoglobin, and is integrated with a forehead temperature monitoring module, thereby solving the problem of single function of the conventional forehead temperature gun and other temperature monitoring equipment, and meeting the urgent requirements of the current market on high-sensitivity monitoring of physiological parameters such as body temperature, brain blood oxygen saturation and the like; the blood oxygen saturation of the forehead measured part is accurately calculated through an algorithm, and the measurement error signal can be subjected to optical modulation compensation through a front lens light path; the operation is simple, the household rapid monitoring device is suitable for household rapid monitoring, the carrying is convenient, and the cost is low.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of a detector according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of hardware components of a detector according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a hardware structure of a detector according to an embodiment of the invention.
Reference numerals illustrate:
1. a housing; 2. an infrared temperature sensor; 3. a light source; 4. a blood oxygen photosensitive detector; 5. a microprocessor unit; 6. a key panel; 7. a function selection button; 8. a blood oxygen selection button group; 9. a body temperature selecting and measuring button group; 10. a display panel; 11. pressing the switch; 12. a power supply; 13. and a voice prompt module.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The invention aims at: provides a cerebral blood oxygen saturation and forehead temperature integrated gun type detection method and instrument, which can rapidly and accurately measure the body temperature of forehead parts of human bodies and the cerebral tissue blood oxygen saturation.
The technical scheme of the invention is as follows: a cerebral blood oxygen saturation and forehead temperature integrated gun type detection method and instrument comprise a shell 1, an infrared temperature sensor 2, a light source 3, a blood oxygen photosensitive detector 4, a micro-processing unit 5, a key panel 6, function selection buttons 7, blood oxygen selection button groups 8, a body temperature selection button group 9, a display panel 10, a press switch 11, a power supply 12 and a voice prompt module 13, wherein the circuit design of each part is shown in figure 3.
The micro processing unit 5 (MCU) is a core device of the whole circuit system and is used for receiving the local physiological parameter signals of the forehead of the human body transmitted by the infrared temperature sensor 2 or the near infrared photosensitive detector, and an A/D conversion circuit can be integrated at the same time to convert the received analog signals into digital signals; the MCU can be made as two separate units: the near infrared blood oxygen monitoring unit and the infrared body temperature monitoring unit are integrated, and the two relatively independent units can be integrated on the same chip through matched lower computer software programs and PCB circuit design; in order to simplify the hardware circuit structure of the instrument, the MCU can integrate a precise operational amplifier circuit to realize temperature sensitive induction of millivolt level and accurate blood oxygen change monitoring.
The blood oxygen saturation/body temperature monitoring module consists of a light path, a detector, a signal amplifying current, a signal processing, a display output and the like; the optical path system can collect and reflect infrared radiation energy on the superficial surface of local tissues, infrared light or near infrared light radiated or reflected by the forehead tissues to be tested enters an optical system of the instrument, the infrared light collected and injected by the optical system is input into the photoelectric detector, the key components of the detector are an infrared temperature sensor 2 and a photosensitive detector, detected optical signals are converted into electric signals, the signals are processed through an amplifying circuit, and the electric signals are converted into temperature values/blood oxygen saturation values of the targets to be tested after being corrected through a front lens modulation optical path according to a set algorithm and target emissivity.
The infrared temperature sensor 2 adopts a thermopile pyroelectric infrared sensor, the measured local temperature value is accurately captured by utilizing the Seebeck effect, the measurement temperature range is required to be 32-42 ℃, and the measurement voltage sensitivity is not lower than 50mV/°C; the temperature sensor can be adapted to various types of optical lenses, so that optical modulation compensation can be realized for measuring the oxygen saturation of forehead blood of the brain, and the temperature sensor has good penetrability for 700-900nm wavelength light; meanwhile, the integrated circuit module is matched for use, and the integrated circuit module has the functions of comprehensive calibration and real-time work, namely, the integrated circuit module can eliminate the influence of the ambient temperature on the use of the integrated circuit module and can also reach the measurement function within the error standard range in time.
The blood oxygen photosensitive detector 4 is a photosensitive detector sensitive to 700-900nm wave band, can integrate a pre-signal amplifier, adjusts the photoelectric sensitivity of a detector circuit by changing the gain of the amplifier, and can realize the same function by a signal amplifying circuit; the light source 3 is a two-wavelength LED light source 3, one wavelength range is 650nm-800nm, the other wavelength range is 800nm-900nm, and the preferable ranges of the two wavelengths are 730nm-780nm and 810nm-860nm respectively; the installation distance between the light source 3 and the blood oxygen photosensitive detector 4 and the infrared temperature sensor 2 is 2.5 cm to 3.0cm.
The front ends of the infrared temperature sensor 2 and the blood oxygen photosensitive detector 4 are provided with optical modulation systems, and contact type or non-contact type measurement can be adopted according to the requirements; the optical modulation system can modulate the light intensity, amplitude, frequency, phase and the like of the photon transmission, change the propagation direction, polarization direction and the like, and the main devices of the optical modulation system comprise an objective lens, a semi-transparent reflector, a condenser, a beam expander and the like, and the circuit mainly comprises an input interface, a driving circuit, an amplifier, a distinguishing circuit, an output interface and the like, so that the methods of radiation source intensity modulation, photoelectron intensity modulation, magneto-optical polarization modulation and the like can be selected according to specific design requirements; the contact measurement is to directly attach the instrument probe to the surface of the forehead skin for measurement; the non-contact measurement can avoid cross infection of bacteria and viruses on the surface of the skin, and the like, and the instrument probe is 1 cm to 3cm away from the forehead surface during measurement, a modulation light path is designed, and the center of the light path is converged to the forehead skin of the human body through a lens and an algorithm.
The key panel 6 is embedded with a plurality of function selection button 7 groups, including a function selection button 7, a blood oxygen selection button group 8 and a body temperature selection button group 9; the function selection button 7 can realize the function switching of blood oxygen saturation monitoring or body temperature monitoring, and single measurement realizes a single function, so that the mutual interference of light with different wavelengths is avoided; the monitoring of the blood oxygen saturation can select the measurement of parameters such as the concentration of oxyhemoglobin or the blood oxygen saturation, the emission wavelength of the corresponding light source 3 of the oxyhemoglobin measurement is 750nm, and the corresponding wavelength of the deoxyhemoglobin measurement is 900nm; body temperature monitoring may be measured in degrees celsius/degrees fahrenheit as desired.
The push switch 11 can realize the whole circuit inching on-off function, the circuit is designed to be in a normally-off state, and when the push switch 11 is pushed down, the body temperature monitoring or blood oxygen saturation monitoring circuit is turned on once, so that the normal function is realized.
In order to increase the user experience, the invention can selectively design the following functions: the result display panel 10 is controlled by the MCU to display the measured body temperature or blood oxygen saturation value; meanwhile, the result reading is convenient in the working process, the panel background is automatically lightened, when the measured result value is in the normal range, the background light is green, and when the measured result value exceeds the normal range, the background light is red.
In order to increase the user experience, the invention can selectively design the following functions: the voice prompt module 13 is used for prompting a user, and when the selected blood oxygen saturation/body temperature monitoring function is completed, the module sounds a dripping sound to prompt the user to complete measurement; when the measured value exceeds the normal value range of the human body, continuous dripping sound is emitted.
The measuring method of the blood oxygen saturation monitoring module comprises the following steps: non-invasive measurement is carried out on a part of a human body by adopting near infrared spectrum, calculation is carried out by adopting a self-invasive continuous wave blood oxygen absolute quantity monitoring method, a tightly overlapped two-channel and multi-channel measuring and calculating method is adopted, one light source 3 and two or more photosensitive detectors are designed, or two or more light sources 3 and one photosensitive detector are adopted, forehead tissue emergent light intensity detected by two or more detection channels is utilized, analysis is carried out on optical measurement physical quantity of continuous waves based on a micro-differential principle to obtain absolute concentration value measurement of forehead oxygen or deoxyhemoglobin, the absolute concentration value measurement is converted into blood oxygen saturation (StO 2), the blood oxygen saturation is displayed as a final reading result, and a calculation algorithm of the blood oxygen saturation (StO 2) is as follows:
\mathrm{St}\mathrm{O}_\mathrm{2}\mathrm{＝}[HbO2]HbO2+[Hb]×100％
wherein HbO2 and Hb are the oxygenated hemoglobin and deoxygenated hemoglobin concentrations, respectively.
The innovation point of the invention is that: the gun type near infrared spectrum cerebral blood oxygen and forehead temperature monitoring instrument integrates two physiological parameter monitoring which are urgent attention of people at present, namely body temperature monitoring and hemoglobin concentration detection, so that the problem of single function of the existing instrument is solved; the real-time accurate monitoring and reading functions of the body temperature/blood oxygen concentration are realized, and errors caused by manual operations can be compensated by modulating the light path; time is saved; the handheld shape design is convenient for a user to carry and use; simple structure, low cost and convenient market industrialization popularization.
The probe part of the detector can have various variations, as shown in the drawing, a plurality of light sources 3 or detectors which are arranged in a space lattice mode are distributed in a staggered mode in space, and a double-channel mode is generally used for measuring and calculating, namely two light sources 3 or photosensitive detectors are used, and a three-channel or multi-channel mode is used for auxiliary calibration of the precision of the measured physical quantity.
The internal layout and the shell design of the detector adopt gun-like shapes, can also adopt flashlight type, handle type and other layout designs, and any equivalent replacement mode without deviating from the technical scheme of the detector is within the protection scope of the detector.
In order to accurately measure data, the invention adopts the design of measuring the forehead temperature and then measuring the cerebral blood oxygen; the method can also select forehead and brain oxygen saturation synchronous measurement according to the requirements of users, perform necessary signal crosstalk prevention design, intervene forehead micro-heat phenomenon generated by an optical path system and infrared irradiation during two physical quantity collection, and design a false signal preprocessing algorithm and a physical quantity measurement calibration algorithm.
The physical quantities such as the user forehead temperature and the cerebral blood oxygen saturation and the like collected by the invention can be selected to be not saved according to the privacy protection requirement of the user, can also be selected to collect data to be shared, and can be selected to be uploaded to a personal server or used for the crowd artificial intelligent analysis of the data, and the physiological pathological change reminding is carried out on the user according to the physiological parameters measured by the user.
The microcontroller of the body temperature monitoring module of the instrument adopts ST series DSP single chip, LQFP64pin package is adopted, CPU is High performance 32Bit RISC, main frequency is 120MHz, ADC is 24Bit High precision processor, working voltage: 2.2-5.5V wide voltage; the built-in RTC clock is selected by a crystal circuit without an operational amplifier IC, a screen driving IC and a boosting IC, various analog/digital sensors are supported, various dot matrix screens are supported, a code breaking screen and a nixie tube are not needed, an external driving IC is not needed, and the temperature degree/Fahrenheit degree F can be switched.
The light source 3 is a L735.805.850-40C32P type LED light source 3 produced by USHIO EPITEX company, the emission dual wavelength is 735nm and 850nm respectively, the working current is 50mA, the forward voltage is 2V, the power is 9mW, and the wavelength bandwidth error is +/-10 nm; preferably, the photosensitive detector is of the type OPT101, integrated pre-amplifier and integrated feedback resistor of 1mΩ.
The microcontroller is preferably an STM32F103ZET6 chip produced by STMicroelectronics company, is provided with a 32-bit RISC high-performance core, has a main frequency of 72MHz and has 112 general I/O interfaces; the light source 3 constant current driving module is preferably a TLC5916 chip of TI company, the applicable voltage is 3.3V/5V, the working current is 3Ma-120mA, the working frequency is 30MHz, and the light source can rapidly respond to input and output.
The power supply management system of the instrument can select a 5V dry battery/220V alternating current storage power supply 12 mode, and can simultaneously provide a plurality of different power supply modes; preferably, a LT1763-3.3V voltage stabilizing chip developed by Linear Technology Corporation is adopted for supplying power to the micro-processing unit 5 for body temperature/blood oxygen monitoring, and a LT1763-5V voltage stabilizing chip is adopted for supplying 5V voltage for supplying power to the LED light source 3 and part of digital devices; a REF5040-4.096V voltage stabilizing chip is used to provide a reference voltage to the digital-to-analog conversion chip of the micro-processing unit 5.
The probe part of the invention adopts black opaque soft rubber material, and is internally embedded with an infrared temperature sensor 2, a light source 3, a blood oxygen photosensitive detector 4 and the like; when the body temperature is monitored, the distance between the probe and the human tissue is 1-3cm, and when the blood oxygen saturation is monitored, the probe is ensured to be clung to the surface of the tissue to be measured; in order to avoid the influence of tiny temperature change generated in the forehead temperature monitoring process on blood oxygen monitoring, the two functions are staggered for 5-10s as much as possible, so that the measurement result is more accurate.
Those of ordinary skill in the art will appreciate that the elements and method steps of each example described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the elements and steps of each example have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in this application, it should be understood that the disclosed methods and systems may be implemented in other ways. For example, the above-described division of units is merely a logical function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. The units may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. Cerebral blood oxygen saturation and forehead temperature integrated gun type detecting instrument, its characterized in that: comprises a micro-processing unit (5), an infrared temperature detection unit and a blood oxygen detection unit which are connected with the micro-processing unit (5);
the infrared temperature detection unit comprises an infrared temperature sensor (2) and is used for detecting the temperature of a part to be detected;
the blood oxygen detection unit comprises a photosensitive detector (4) and a near infrared light source (3) and is used for detecting the blood oxygen concentration of a part to be detected;
the micro-processing unit (5) is used for receiving physiological parameter signals of the part to be detected transmitted by the infrared temperature sensor (2) or the photosensitive detector (4).
2. The brain blood oxygen saturation and frontal temperature integrated gun-type detection instrument according to claim 1, wherein: the micro-processing unit (5) integrates an A/D conversion circuit and converts the received analog signals into digital signals;
the micro-processing unit (5) integrates a precise operational amplifier circuit to realize temperature sensitive induction of millivolt level and accurate blood oxygen change monitoring.
3. The brain blood oxygen saturation and frontal temperature integrated gun-type detection instrument according to claim 1, wherein: the infrared temperature sensor (2) adopts a thermopile pyroelectric infrared sensor, the measured local temperature value is captured by utilizing the Seebeck effect, the measuring temperature range is required to be 32-42 ℃, and the measuring voltage sensitivity is not lower than 50 mV/DEG C.
4. The brain blood oxygen saturation and frontal temperature integrated gun-type detection instrument according to claim 1, wherein: the photosensitive detector is a photosensitive detector sensitive to 700-900nm wave band, a pre-signal amplifier is integrated in the photosensitive detector, the photoelectric sensitivity of the detector circuit is adjusted by changing the gain of the amplifier, and the same function can be realized by a signal amplifying circuit;
the light source (3) is a two-wavelength LED light source (3), one wavelength range is 650nm-800nm, the other wavelength range is 800nm-900nm, and the preferable ranges of the two wavelengths are 730nm-780nm and 810nm-860nm respectively;
the installation distance between the light source (3) and the blood oxygen photosensitive detector (4) and the infrared temperature sensor (2) is 2.5 cm to 3.0cm.
5. The brain blood oxygen saturation and frontal temperature integrated gun-type detection instrument according to claim 1, wherein: during measurement, the infrared temperature sensor (2) and the front end of the photosensitive detector of blood oxygen are in contact measurement or non-contact measurement with the part to be measured.
6. The brain blood oxygen saturation and frontal temperature integrated gun-type detection instrument according to claim 1, wherein: the blood oxygen measuring device is also provided with a control panel, and a plurality of function selection button groups (7) are embedded in the key panel (6) and comprise a function selection button (7), a blood oxygen measuring button group (8) and a body temperature measuring button group (9);
the function selection button (7) is used for realizing function switching of blood oxygen saturation monitoring or body temperature monitoring, and single measurement realizes a single function, so that mutual interference caused by light with different wavelengths is avoided;
the monitoring of the blood oxygen saturation can select the measurement of parameters such as the concentration of oxyhemoglobin or the blood oxygen saturation, the emission wavelength of a corresponding light source (3) for the measurement of oxyhemoglobin is 750nm, and the corresponding wavelength for the measurement of deoxyhemoglobin is 900nm;
the body temperature monitoring can be carried out by selecting the temperature of celsius degrees/Fahrenheit degrees according to the requirement, and the error value is compensated by different parts through an algorithm.
7. The brain blood oxygen saturation and forehead temperature integrated gun type detection method according to any one of claims 1-6, wherein the blood oxygen saturation measurement method is as follows:
a light source (3) and two or more photosensitive detectors are used,
or (b)
Two or more light sources (3) and a photosensitive detector are used,
analyzing the optical measurement physical quantity of the continuous wave based on the principle of micro-differentiation by utilizing the outgoing light intensity of forehead tissues detected by two or more detection channels to obtain the absolute concentration value measurement and calculation of forehead oxygen-containing or deoxidized hemoglobin, converting the absolute concentration value measurement and calculation into the blood oxygen saturation (StO 2), displaying the blood oxygen saturation (StO 2) as a final reading result, and calculating the blood oxygen saturation (StO 2) by the following algorithm:
\mathrm { St } \mathrm { O } \mathrm {2} \mathrm { = } [ HbO2] HbO2+ [ Hb ]. Times.100% where HbO2 and Hb are the oxygenated and deoxygenated hemoglobin concentrations, respectively.
8. An electronic device comprising a processor and a memory communicatively coupled to the processor for storing processor-executable instructions, characterized in that: the processor is configured to perform the cerebral blood oxygen saturation and frontal temperature integrated gun-type detection method of claim 7.
9. A computer-readable storage medium storing a computer program, characterized in that: the computer program when executed by a processor implements the cerebral blood oxygen saturation and frontal temperature integrated gun-type detection method of claim 7.
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