CN114177446A - Intelligent oxygen supply system - Google Patents

Intelligent oxygen supply system Download PDF

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Publication number
CN114177446A
CN114177446A CN202111555927.8A CN202111555927A CN114177446A CN 114177446 A CN114177446 A CN 114177446A CN 202111555927 A CN202111555927 A CN 202111555927A CN 114177446 A CN114177446 A CN 114177446A
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oxygen
oxygen supply
user
time
data
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马婷婷
刘桦瑞
潘宏青
李皓
陈勇
曹平国
徐湛楠
宋全军
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Hefei Institutes of Physical Science of CAS
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Hefei Institutes of Physical Science of CAS
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/04—Heartbeat characteristics, e.g. ECG, blood pressure modulation
    • A61M2230/06—Heartbeat rate only
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/20—Blood composition characteristics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/30—Blood pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/40—Respiratory characteristics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/40—Respiratory characteristics
    • A61M2230/42—Rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/40—Respiratory characteristics
    • A61M2230/43—Composition of exhalation

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The invention discloses an intelligent oxygen supply system which comprises a physiological parameter acquisition module, a respiratory signal detection module, a control module and an oxygen supply module; one end of the oxygen supply pipeline is connected with the oxygen bottle and is used for supplying oxygen in the oxygen bottle into the oxygen supply pipeline; the second end of the oxygen supply pipeline is connected with the gas circuit of the three-way pipe fitting; one branch of the three-way pipe fitting is an oxygen outlet connected with the oxygen mask; the electromagnetic valve is arranged on the oxygen supply pipeline; the respiratory signal detection module is connected with the other branch gas circuit of the three-way pipe fitting and is used for collecting respiratory pressure information of a user; the invention controls intelligent and accurate oxygen supply by accurately judging the breathing state of the user and calculating the oxygen demand of the oxygen absorber in real time, strictly controls the oxygen supply amount, controls the oxygen supply amount in real time according to the oxygen demand of the wearer, improves the oxygen utilization rate and the oxygen utilization rate of the oxygen absorber, monitors various physiological parameters of the user in real time, and ensures the personal safety of the user.

Description

Intelligent oxygen supply system
Technical Field
The invention relates to the technical field of automatic control of oxygen flow, in particular to an intelligent oxygen supply system.
Background
The atmosphere in the high altitude area presents the characteristics of low pressure and hypoxia, and along with the increase of altitude, the air becomes thin, and the staff in the high altitude area can have the former reaction symptoms such as headache, nausea and vomiting, slow response, so extra supplementary oxygen is inhaled to maintain the normal operation of physical function, and the high altitude area has important significance for doing important work or military work in the high altitude area. Many high-altitude area staff can carry oxygen cylinder or oxygen bag oxygen suppliment with oneself, but traditional oxygen suppliment mode has caused unnecessary waste to oxygen, can not use for a long time, and consequently, automatically regulated supplies oxygen volume to become better selection.
However, the pulse oxygen supply system on the market at present has the defects of low reaction sensitivity, no oxygen supply by inspiration sometimes and oxygen supply quantity which can not be changed along with the requirement of human body. For example, the existing pulse oxygen supply system adopts a mode of pulse oxygen supply according to a fixed time interval, and cannot be automatically matched with the breath of a user; some pulse oxygen supply systems require users to manually adjust the oxygen supply amount according to self feeling, so that the time of the users is wasted, and the utilization rate of oxygen is not high.
Disclosure of Invention
The intelligent oxygen supply system provided by the invention can effectively identify the breathing action of a user, automatically adjust the oxygen supply amount and accurately control the oxygen supply.
In order to achieve the purpose, the invention adopts the following technical scheme:
comprises a physiological parameter acquisition module, a respiratory signal detection module, a control module and an oxygen supply module; the oxygen supply module comprises an oxygen bottle, a flow meter, an oxygen supply pipeline, an electromagnetic valve, an oxygen mask and a three-way element;
one end of the oxygen supply pipeline is connected with the oxygen bottle and used for supplying oxygen in the oxygen bottle into the oxygen supply pipeline;
the flow meter is arranged between the oxygen outlet and the oxygen mask;
the second end of the oxygen supply pipeline is connected with the gas circuit of the three-way pipe fitting;
one branch of the three-way pipe fitting is an oxygen outlet connected with the oxygen mask;
the electromagnetic valve is arranged on the oxygen supply pipeline;
the respiratory signal detection module is connected with the other branch gas circuit of the three-way pipe fitting and is used for collecting respiratory pressure information of a user;
the physiological parameter acquisition module comprises: a physiological sign monitoring sensor and a breath end carbon dioxide sensor;
the physiological sign monitoring sensor is worn on the fingertip of a user and is used for collecting the heart rate, the blood oxygen saturation and the blood pressure of a wearer;
one end of the breath end carbon dioxide sensor is connected with the oxygen mask and used for collecting the breathing frequency, the breath end carbon dioxide concentration and the inhaled carbon dioxide concentration of a wearer;
control module detects the solenoid valve connection in mould, physiological parameter collection module and the oxygen suppliment module in respiratory signal respectively for receive in real time user's breathing atmospheric pressure information, physiological parameter information obtain user's real-time oxygen consumption and respiratory signal data through data processing, according to time T is long with the oxygen suppliment to the initial point T of user's real-time oxygen consumption and respiratory signal data definite oxygen suppliment, oxygen suppliment time, when reaching the initial point T of oxygen suppliment time, passes through control module control opens the aperture of solenoid valve and carries out the oxygen suppliment, and time T is long when reaching the oxygen suppliment, passes through the control unit control closes the solenoid valve and finishes the oxygen suppliment.
Further, the process that the control unit determines the starting point T of the oxygen supply time, the oxygen supply time T and the oxygen consumption according to the real-time oxygen consumption of the user and the respiration waveform curve data is as follows:
sampling the respiratory signal data of the user in real time, taking continuously-increased data with a sampling value larger than zero, and considering that inspiration starts if the value in the data is larger than a set respiratory trigger threshold, wherein the recording time is T, and the T is the starting point of oxygen supply time; continuing data sampling, and when the sampling value is less than zero, continuously reduced data appear, and the value in the section of data is less than a set breath end judgment threshold value, considering that expiration is ended;
the oxygen supply time t is 0.5 s;
sampling physiological parameter information data of the user in real time, establishing an oxygen consumption estimation model through an early-stage experiment, and acquiring and establishing a target database of physiological parameters of oxygen consumption, blood oxygen saturation, respiration rate and heart rate of a human body in different motion modes through a design experiment; carrying out normalization pretreatment on each signal, and analyzing time domain and frequency domain characteristics of the sampled signals by utilizing a multi-resolution characteristic extraction method combining Hilbert-Huang variation and empirical mode analysis; establishing a regression model for estimating the amount of oxygen consumed by movement by using a correlation vector machine algorithm of a sparse Bayesian model through multi-data feature fusion, and verifying the accuracy of the model through experiments; finally obtaining the oxygen consumption calculation formula VO2＝v×t×[0.85-EtCO2)]/[1-(FIO2+FICO2)]×FIO2-0.15×VESTPD；
Wherein v is the flow rate; t is the inspiration time; vESTPDLung ventilation is reported; et (Et)ECO2Is exhaled carbon dioxide concentration; fIO2And FICO2Respectively, inspired oxygen and carbon dioxide concentrations.
Furthermore, the breath signal detection module comprises a miniature pressure sensor, and the miniature pressure sensor is electrically connected with the control unit and used for collecting the breath pressure information of the user and transmitting the breath pressure information to the control unit for data processing to obtain the breath data of the user.
Furthermore, the physiological sign monitoring sensor and the last carbon dioxide sensor of breathing are electrically connected with the control unit and are used for acquiring the last carbon dioxide concentration of breathing, the concentration of carbon dioxide inhalation, the heart rate, the blood oxygen saturation, the blood pressure and the respiratory frequency of the user in real time and transmitting the obtained data to the control unit to obtain the real-time physiological parameters of the user.
Further, the method also comprises the step of correcting the miniature pressure sensor, wherein the correction process is as follows:
in a non-breathing state, the control unit respectively reads and stores detection values X of the miniature pressure sensors; before the breath detection unit performs data processing, acquiring a difference value between the acquired breath pressure data of the user and the detection value X, and performing data processing on the difference value through the data processing unit, wherein the difference value is larger than zero and is judged as inspiration.
Further, the method further comprises filtering the parameters before data sampling the breathing signals and the physiological parameters of the user.
The oxygen supply device further comprises a proportional valve, wherein the air storage tank bottle is connected with an air path of the proportional valve, and the first end of the oxygen supply pipeline is connected with an air path of the oxygen bottle.
Furthermore, the oxygen supply unit also comprises a miniature pressure sensor, the miniature pressure sensor is connected with the air passage of the oxygen tank and is electrically connected with the control unit, and the miniature pressure sensor is used for acquiring pressure information in an air storage tank and transmitting the pressure information to the control unit; in the process of determining the starting point T of oxygen supply time and the oxygen supply time period T, when the breathing pressure signal is greater than a threshold value, the control unit controls the electromagnetic valve to open oxygen supply, at the moment, the control unit simultaneously controls the pressure sensor to collect the pressure in the gas storage tank to be P, and the opening degree of the proportional valve is controlled according to the pressure P in the gas storage tank and the oxygen consumption of a user.
According to the technical scheme, the invention relates to the technical field of oxygen supply, in particular to a portable accurate oxygen supply system in high altitude and high cold environment, which comprises: the device comprises an oxygen supply module, a respiratory signal detection module, a physiological parameter acquisition module and a control module. The oxygen supply module consists of an oxygen bottle, an electromagnetic valve, an oxygen supply pipeline, an oxygen mask and a three-way pipe fitting; the breathing signal detection module is used for detecting the breathing signal of the wearer; the physiological parameter acquisition module consists of a physiological sign monitoring sensor arranged at the end of a finger and a breath end carbon dioxide sensor connected with a breathing mask and is used for acquiring the breath end carbon dioxide concentration, the inhaled carbon dioxide concentration, the heart rate, the blood oxygen saturation, the blood pressure and the breathing frequency of a wearer in real time; and the control module is used for processing the information acquired by the physiological parameter acquisition module in real time, outputting a signal for controlling the opening of the electromagnetic valve through fusion processing, and controlling the oxygen flow output by the oxygen cylinder in real time. The invention utilizes a multi-sensing fusion algorithm to realize oxygen supply according to needs, reduce oxygen waste and prolong the oxygen supply time of the existing equipment.
The portable accurate oxygen supply system in the plateau environment, which is implemented by the invention, can control intelligent accurate oxygen supply by accurately judging the breathing state of the user and calculating the oxygen demand of the oxygen absorber in real time, strictly control the oxygen supply amount, and control the oxygen supply amount in real time according to the oxygen demand of the wearer, thereby improving the oxygen utilization rate and the oxygen utilization rate of the oxygen absorber, simultaneously monitoring various physiological parameters of the user in real time, and ensuring the personal safety of the user.
Drawings
FIG. 1 is a schematic diagram of an oxygen supply module;
FIG. 2 is a schematic diagram of the structure of a control unit of the oxygen supply module;
fig. 3 is a flow chart of a control method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
The intelligent oxygen supply system of the invention comprises: the device comprises an oxygen supply module, a respiratory signal detection module, a physiological parameter acquisition module and a control module; the oxygen supply module, the respiration signal detection module, the physiological parameter acquisition module and the control module are respectively powered through the power supply module.
Fig. 2 shows a schematic diagram of a control module of the oxygen supply module, wherein the control module comprises: the oxygen supply module and the respiration signal detection module are used for collecting respiration signals of the user and carrying out real-time accurate oxygen supply on the user under the action of the control module through the information collected by the physiological parameter collection module. The accurate oxygen supply control is completed by the oxygen supply module, the respiration signal detection module and the physiological parameter acquisition module together.
As shown in fig. 1, the oxygen supply module includes: oxygen cylinder, oxygen supply pipeline, solenoid valve, oxygen mask and tee bend component. The first end of the oxygen supply pipeline is connected with the oxygen cylinder gas circuit, and oxygen in the oxygen cylinder is supplied to the oxygen supply pipeline; the second end of the oxygen supply pipeline is connected with the gas circuit of the three-way pipe fitting, one branch of the three-way pipe fitting is an oxygen outlet, and the oxygen outlet is connected with an oxygen mask; the proportional valve is arranged on the oxygen supply pipeline and controls the flow of oxygen on the oxygen supply pipeline.
The breathing signal detection module is connected with the other passage of the tee pipe fitting through a gas circuit, is electrically connected with the control unit and is used for collecting breathing air pressure information of a user and transmitting the air pressure information to the control unit to perform data processing so as to judge whether the wearer is in an inspiration state.
The physiological parameter acquisition module is electrically connected with the control unit and used for acquiring physiological parameter information of the user in real time, transmitting the physiological parameter information to the control unit for data processing to obtain the real-time oxygen consumption of the user and controlling the opening of the valve.
Specifically, the respiration signal detection module includes: the miniature pressure sensor collects the breath air pressure information of the user and transmits the collected pressure information to the data processing unit of the control unit for data processing, so that whether the user is in an inspiration state is judged. The miniature pressure sensor directly detects the breathing parameters from the oxygen outlet through the tee pipe fitting, does not need the control of an air circuit, and is simple to realize and convenient to control.
Specifically, the physiological parameter acquisition module comprises: the physiological sign monitoring sensor is arranged at the end of the finger and the end-of-breath carbon dioxide sensor is connected with the breathing mask, and the physiological sign monitoring sensor acquires heart rate and blood oxygen saturation information of a user; the concentration of carbon dioxide inhaled by a user, the concentration of carbon dioxide at the end of respiration and the respiratory frequency are collected by a carbon dioxide sensor at the end of respiration. And the acquired physiological parameter information is transmitted to a data processing unit of the control unit for data processing, so that the real-time oxygen consumption and physical condition information of the user are obtained.
The control unit respectively with the proportional valve breathe signal detection module with physiological parameter gathers the module electricity and connects, is used for receiving user breathes pressure signal and physiological parameter information, and according to user breathes pressure signal data and physiological parameter information and confirms the initial point T and the oxygen suppliment volume of oxygen suppliment time, when reaching the initial point T of oxygen suppliment time, passes through the control unit control proportional valve opening carries out the oxygen suppliment, and is long T when reaching the oxygen suppliment, passes through the control unit control closes the solenoid valve and finishes the oxygen suppliment.
After the respiratory signal detection module and the physiological parameter acquisition module obtain the respiratory pressure signal and the physiological parameter information of a user, the control module performs accurate oxygen supply control according to the respiratory pressure signal and the physiological parameter information of the user, and the specific working process is as follows:
determining an initial point T of oxygen supply time according to the respiratory pressure signal of the user, wherein the specific process is as follows:
sampling the respiratory pressure data of the user, taking continuously-increased data with a sampling value larger than zero, and considering that inspiration starts if the value in the data is larger than a set respiratory trigger threshold, wherein the recording time is T, and the T is the starting point of oxygen supply time;
continuing data sampling, when the sampling value is less than zero, continuously reduced data appears, and the value in the data is less than the set breath ending judgment threshold value, considering ending the expiration,
according to the previous experiments, a breathing cycle is 2 s-4 s, and the inspiration time is shorter than the expiration time. Since the inspiratory volume is maximized in the first 0.5s of the inspiratory phase, oxygen is most effectively supplied in the first 0.5s of inspiration, so t is 0.5 s.
The physiological parameter information data of the user are sampled in real time, an oxygen consumption estimation model is established through early-stage experiments, and the physiological parameter information data are acquired through design experiments and are established in different motion models of the human bodyAnd (3) a target database of physiological parameters such as oxygen consumption, blood oxygen saturation, respiration rate, heart rate and the like under the formula. Preprocessing signals such as normalization and the like, and analyzing time domain and frequency domain characteristics of sampling signals by utilizing a multi-resolution characteristic extraction method combining Hilbert-Huang (HHT) change and empirical mode analysis. Through multi-data feature fusion, a regression model of the motion oxygen consumption estimation is established by utilizing a correlation vector machine algorithm of a sparse Bayesian model, and the accuracy of the model is verified through experiments. Finally, the formula V is obtainedO2＝v×t×[0.85-EtCO2)]/[1-(FIO2+FICO2)]×FIO2-0.15×VESTPD，Oxygen consumption was calculated using this equation. (V flow Rate; t inspiratory Length; V)ESTPDLung ventilation is reported; et (Et)ECO2Is exhaled carbon dioxide concentration; fIO2And FICO2Inspired oxygen and carbon dioxide concentrations, respectively).
After the initial point T of oxygen supply time and the oxygen supply time T are determined, the control unit automatically controls to open the proportional valve for supplying oxygen according to the physiological parameter information when the initial point T of the oxygen supply time is reached, oxygen is delivered to a user through the oxygen outlet of the tee pipe fitting, and the proportional valve is automatically controlled to close to finish oxygen supply when the oxygen supply time T is reached.
In conclusion, the portable accurate oxygen supply system in the plateau environment, which is implemented by the invention, can control intelligent accurate oxygen supply, strictly control oxygen supply and control in real time according to the oxygen demand of a wearer by accurately judging the breathing state of the user and calculating the oxygen demand of the oxygen inhaler in real time, thereby improving the utilization rate of oxygen and the utilization rate of oxygen of the oxygen inhaler, and simultaneously monitoring various physiological parameters of the user in real time, thereby ensuring the personal safety of the user.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. An intelligent oxygen supply system comprises a physiological parameter acquisition module, a respiration signal detection module, a control module and an oxygen supply module; the oxygen supply module comprises an oxygen bottle, a flow meter, an oxygen supply pipeline, an electromagnetic valve, an oxygen mask and a three-way element;
one end of the oxygen supply pipeline is connected with the oxygen bottle and used for supplying oxygen in the oxygen bottle into the oxygen supply pipeline;
the flow meter is arranged between the oxygen outlet and the oxygen mask;
the second end of the oxygen supply pipeline is connected with the gas circuit of the three-way pipe fitting;
one branch of the three-way pipe fitting is an oxygen outlet connected with the oxygen mask;
the electromagnetic valve is arranged on the oxygen supply pipeline;
the respiratory signal detection module is connected with the other branch gas circuit of the three-way pipe fitting and is used for collecting respiratory pressure information of a user;
the physiological parameter acquisition module comprises: a physiological sign monitoring sensor and a breath end carbon dioxide sensor;
the physiological sign monitoring sensor is worn on the fingertip of a user and is used for collecting the heart rate, the blood oxygen saturation and the blood pressure of a wearer;
one end of the breath end carbon dioxide sensor is connected with the oxygen mask and used for collecting the breathing frequency, the breath end carbon dioxide concentration and the inhaled carbon dioxide concentration of a wearer;
control module detects the solenoid valve connection in mould, physiological parameter collection module and the oxygen suppliment module in respiratory signal respectively for receive in real time user's breathing atmospheric pressure information, physiological parameter information obtain user's real-time oxygen consumption and respiratory signal data through data processing, according to time T is long with the oxygen suppliment to the initial point T of user's real-time oxygen consumption and respiratory signal data definite oxygen suppliment, oxygen suppliment time, when reaching the initial point T of oxygen suppliment time, passes through control module control opens the aperture of solenoid valve and carries out the oxygen suppliment, and time T is long when reaching the oxygen suppliment, passes through the control unit control closes the solenoid valve and finishes the oxygen suppliment.
2. The intelligent oxygen supply system of claim 1, wherein: the process that the control unit determines the starting point T of the oxygen supply time, the oxygen supply time T and the oxygen consumption according to the real-time oxygen consumption of the user and the respiration waveform curve data is as follows:
sampling the respiratory signal data of the user in real time, taking continuously-increased data with a sampling value larger than zero, and considering that inspiration starts if the value in the data is larger than a set respiratory trigger threshold, wherein the recording time is T, and the T is the starting point of oxygen supply time; continuing data sampling, and when the sampling value is less than zero, continuously reduced data appear, and the value in the section of data is less than a set breath end judgment threshold value, considering that expiration is ended;
the oxygen supply time t is 0.5 s;
sampling physiological parameter information data of the user in real time, establishing an oxygen consumption estimation model through an early-stage experiment, and acquiring and establishing a target database of physiological parameters of oxygen consumption, blood oxygen saturation, respiration rate and heart rate of a human body in different motion modes through a design experiment; carrying out normalization pretreatment on each signal, and analyzing time domain and frequency domain characteristics of the sampled signals by utilizing a multi-resolution characteristic extraction method combining Hilbert-Huang variation and empirical mode analysis; establishing a regression model for estimating the amount of oxygen consumed by movement by using a correlation vector machine algorithm of a sparse Bayesian model through multi-data feature fusion, and verifying the accuracy of the model through experiments; finally obtaining the oxygen consumption calculation formula VO2＝v×t×[0.85-EtCO2)]/[1-(FIO2+FICO2)]×FIO2-0.15×VESTPD；
Wherein v is the flow rate; t is the inspiration time; vESTPDLung ventilation is reported; et (Et)ECO2Is exhaled carbon dioxide concentration; fIO2And FICO2Respectively, inspired oxygen and carbon dioxide concentrations.
3. The intelligent oxygen supply system of claim 2, wherein: the breath signal detection module comprises a miniature pressure sensor, the miniature pressure sensor is electrically connected with the control unit and used for collecting breath air pressure information of a user and transmitting the breath air pressure information to the control unit for data processing to obtain breath data of the user.
4. The intelligent oxygen supply system of claim 3, wherein: the physiological sign monitoring sensor and the last breath carbon dioxide sensor are electrically connected with the control unit and used for collecting the last breath carbon dioxide concentration, the inhaled carbon dioxide concentration, the heart rate, the blood oxygen saturation, the blood pressure and the respiratory frequency of the user in real time and transmitting the collected information to the control unit for data processing to obtain the real-time physiological parameters of the user.
5. The intelligent oxygen supply system of claim 1, wherein: the method also comprises the step of correcting the miniature pressure sensor, wherein the correction process is as follows:
in a non-breathing state, the control unit respectively reads and stores detection values X of the miniature pressure sensors; before the breath detection unit performs data processing, acquiring a difference value between the acquired breath pressure data of the user and the detection value X, and performing data processing on the difference value through the data processing unit, wherein the difference value is larger than zero and is judged as inspiration.
6. The intelligent oxygen supply system of claim 1, wherein: further comprising filtering the parameters prior to data sampling the user respiratory signal and physiological parameters.
7. The intelligent oxygen supply system of claim 1, wherein: the oxygen supply device is characterized by further comprising a proportional valve, wherein the air storage tank bottle is connected with an air path of the proportional valve, and the first end of the oxygen supply pipeline is connected with an air path of the oxygen bottle.
8. The intelligent oxygen supply system of claim 1, wherein: the oxygen supply unit also comprises a miniature pressure sensor, the miniature pressure sensor is connected with the air passage of the oxygen tank and is electrically connected with the control unit, and the miniature pressure sensor is used for collecting pressure information in the air storage tank and transmitting the pressure information to the control unit; in the process of determining the starting point T of oxygen supply time and the oxygen supply time period T, when the breathing pressure signal is greater than a threshold value, the control unit controls the electromagnetic valve to open oxygen supply, at the moment, the control unit simultaneously controls the pressure sensor to collect the pressure in the gas storage tank to be P, and the opening degree of the proportional valve is controlled according to the pressure P in the gas storage tank and the oxygen consumption of a user.
CN202111555927.8A 2021-12-17 2021-12-17 Intelligent oxygen supply system Pending CN114177446A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115487388A (en) * 2022-09-15 2022-12-20 北京理工大学 Closed-loop oxygen supply adjusting system based on oxyhemoglobin saturation feedback
CN116139461A (en) * 2023-02-07 2023-05-23 中国人民解放军空军军医大学 Low oxygen quantitative air supply device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115487388A (en) * 2022-09-15 2022-12-20 北京理工大学 Closed-loop oxygen supply adjusting system based on oxyhemoglobin saturation feedback
CN115487388B (en) * 2022-09-15 2023-11-14 北京理工大学 Closed-loop oxygen supply adjusting system based on blood oxygen saturation feedback
CN116139461A (en) * 2023-02-07 2023-05-23 中国人民解放军空军军医大学 Low oxygen quantitative air supply device
CN116139461B (en) * 2023-02-07 2024-05-17 中国人民解放军空军军医大学 Low oxygen quantitative air supply device

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