CN114796911A - Mask breathing following control method capable of following breathing volume - Google Patents
Mask breathing following control method capable of following breathing volume Download PDFInfo
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000000241 respiratory effect Effects 0.000 claims abstract description 17
- 230000036391 respiratory frequency Effects 0.000 claims abstract description 8
- 238000004364 calculation method Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 4
- 230000035565 breathing frequency Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
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- 230000036387 respiratory rate Effects 0.000 description 2
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- 230000002349 favourable effect Effects 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
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- G—PHYSICS
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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Abstract
A mask breath following control method capable of following the breath volume comprises collecting the pressure value, calculating the pressure difference, averaging, setting the breath judgment value, setting the trigger threshold, judging the state, calculating the corresponding relation, calculating the tidal volume, calculating the internal and external pressure difference, determining the pressure difference instruction value and controlling, by collecting the internal and external air pressure difference of the mask, the exhalation state and the inhalation state are pre-judged in advance, the real-time respiratory capacity of the operator is calculated through the pressure difference inside and outside the mask and the respiratory frequency, the real-time pressure difference control instruction value is calculated through the respiratory capacity, the breathing state and the breathing state of the operation personnel by the gas mask are pre-judged in advance, the air supply state of a fan of the gas mask is adjusted in time, the following of the respiratory frequency and the respiratory capacity is realized, the problems of overlarge respiratory resistance and breathing discomfort of the gas mask are fundamentally solved, and excellent comfortable breathing experience of the gas mask is obtained.
Description
Technical Field
The invention belongs to the technical field of control over air supply of gas masks, and relates to a mask respiration following control method capable of following respiration volume.
Background
Market mask product mainly is given first in order to inhale filtration formula and air feeder air supply formula mask, it has the mask product that breathes following ability to have, it is too big to inhale filtration formula mask breathing resistance, when breathing in, the pressure reduction of face guard end leads to the pressure of air flue not enough, during expiration, face guard end pressure increases causes breathing difficulty, can make the human body breathing difficulty appear, air feeder air supply formula mask is because the amount of wind is fixed, can not follow operation personnel breathing process in real time, the too high and low also can make the human body breathing difficulty and physiology discomfort appear too much of air supply volume simultaneously, it experiences to be difficult to obtain the comfortable breathing of better mask. The air supply type mask product with the breathing following capability is incomplete in breathing following capability, only can follow breathing rhythm, cannot follow the breathing amount of a human body to adjust, is difficult to fundamentally solve the problems of too large breathing resistance, breathing discomfort and the like, and meanwhile, the existing breathing following method cannot pre-judge the breathing interval, so that the mask fan is delayed in the switching of the breathing and breathing intervals and is inconvenient to use. In order to solve the above problems, it is urgently needed to design a mask breathing following control method based on internal and external pressures.
Disclosure of Invention
The mask breathing following control method is simple in structure, the exhalation state and the inhalation state are pre-judged in advance by collecting the pressure difference of gas inside and outside the mask, the real-time breathing capacity of an operator is calculated through the pressure difference between the inside and the outside of the mask and the breathing frequency, the real-time pressure difference control instruction value is calculated through the breathing capacity, the exhalation state and the inhalation state of the operator are pre-judged in advance by the mask, the air supply state of a mask fan is adjusted in time, the following of the breathing frequency and the breathing capacity is realized, the problems of overlarge breathing resistance and breathing discomfort of the mask are solved fundamentally, and the excellent mask comfortable breathing experience is obtained.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a mask breathing following control method capable of following the breathing volume comprises the following steps:
step 1, collecting pressure values, namely collecting gas pressure in a mask and gas pressure outside the mask;
step 2, calculating the pressure difference, and calculating the difference p between the gas pressure in the mask and the gas pressure outside the mask - ；
Step 3, taking an average value, and taking the difference value p between the internal pressure and the external pressure of the mask in X periods in every X periods - Accumulating the difference between the internal pressure and the external pressure of the mask, and calculating the average value of the difference between the internal pressure and the external pressure of the mask in X periods
X is a natural number more than or equal to 1;
step 4, setting a breathing judgment value, and taking the average value of the internal and external pressure difference values of the mask in X periods
As the respiration judgment value D of the next period;
step 5, setting a trigger threshold, namely setting an expiration-inspiration trigger threshold A - Inspiratory-expiratory trigger threshold B - ，A - ＝αD；B - β D, where α and β are predetermined adjustment coefficients;
step 6, judging the state, and reaching an expiration-inspiration trigger threshold A - The first successive y data monotonically increase to reach the expiratory-inspiratory trigger threshold A - Judging to enter an expiration state; reaching an inhale-exhale trigger threshold B - The first successive y detection data monotonically decrease to reach the inspiration-expiration trigger threshold B - If so, judging to enter an air suction state;
step 7, calculating the corresponding relation and calculating the pressure difference p between the inside and the outside of the mask - Corresponding relation with the gas flow L and the respiratory frequency F of the mask;
step 8, calculating the respiratory volume, and calculating the respiratory volume T of the expiratory interval based on the pressure difference;
step 9, calculating the internal and external reference pressure difference p -* Calculating the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval by taking the respiration volume T of the current expiration interval as the respiration volume of the current inspiration interval -* ；
Step 10, determining a pressure difference instruction value according to the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval -* Sending the pressure difference instruction value r to a microcontroller as the pressure difference instruction value r of the subsequent inspiration time interval, controlling the pressure in the mask by the microcontroller according to the pressure difference r, and solving the reference pressure difference p between the inside and the outside of the mask in the inspiration interval every X periods -* Determining a pressure difference instruction value of a subsequent air suction time interval;
step 11, controlling according to the difference value p between the gas pressure in the mask and the gas pressure outside the mask - Judging the current call state asAnd in an expiration state, the microcontroller controls the mask fan to stop running, and when the mask fan is in an inspiration state, the microcontroller sends the calculated pressure difference instruction value r to the microcontroller, and the microcontroller controls the air supply quantity of the fan according to the pressure difference instruction value r as a control value so as to keep the pressure difference between the inside and the outside of the mask at the control value.
In step 7, the calculation formula for calculating the corresponding relationship is: p is a radical of - ＝δL+γ(F x -F 0 ) Further derivation of
Delta is the flow coefficient, gamma is the frequency coefficient, F x For the current frequency, F 0 Is the reference frequency.
In step 8, the respiration rate T is calculated as T ═ L × T Calling device ，t Calling device The microcontroller calculates the average pressure difference in the expiration time for the expiration time of the current respiration interval, and the respiration frequency is calculated by the microcontroller according to the pressure difference change.
In step 9, the breathing volume T of the current expiration interval is used as the breathing volume of the current inspiration interval, and the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval is calculated -* Is calculated as p -* ＝δL+γ(F x -F 0 )，
Further calculate p -* ，t Suction device For the inspiration time of the current breath interval, the reference frequency F 0 The value is 12.
In step 5, the pre-determined adjustment coefficient alpha is within a range of 0.9-1, and the beta value is within a range of 1-1.1.
The flow coefficient delta is 0.12 and the frequency coefficient gamma is 0.04.
The invention has the main beneficial effects that:
the exhalation state and the inhalation state are pre-judged in advance by collecting the pressure difference of the gas inside and outside the mask.
The real-time breathing quantity of the operator is calculated through the pressure difference between the inside and the outside of the mask and the breathing frequency.
The real-time pressure difference control instruction value is calculated through the respiratory capacity, the breathing state and the breathing state of the mask to the operation personnel can be pre-judged in advance, the air supply state of a mask fan is adjusted in time, and the following of the respiratory frequency and the respiratory capacity is realized.
The problems of overlarge breathing resistance, breathing discomfort and the like of the mask are fundamentally solved.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a control flow chart of the present invention.
Detailed Description
As shown in fig. 1, a mask breathing follow-up control method capable of following a breathing volume includes the steps of:
step 1, collecting pressure values, namely collecting gas pressure in a mask and gas pressure outside the mask;
step 2, calculating the pressure difference, and calculating the difference p between the gas pressure in the mask and the gas pressure outside the mask - ；
Step 3, taking an average value, and taking the difference value p between the internal pressure and the external pressure of the mask in X periods in every X periods - Accumulating the difference between the internal pressure and the external pressure of the mask, and calculating the average value of the difference between the internal pressure and the external pressure of the mask in X periods
X is a natural number more than or equal to 1;
step 4, setting a breathing judgment value, and taking the average value of the internal and external pressure difference values of the mask in X periods
As the respiration judgment value D of the next period;
step 5, setting a trigger threshold, namely setting an expiration-inspiration trigger threshold A - Inspiratory-expiratory trigger threshold B - ，A - ＝αD；B - β D, where α and β are predetermined adjustment coefficients; the purpose of the step is to prejudge the breathing state in advance, so as to provide enough time for the fan driving, ensure that the fan is controlled to stop or work before the breathing state is converted, and avoid the action lag of the fanSynchronization with the breathing state transition is achieved.
Step 6, judging the state, and reaching an expiration-inspiration trigger threshold A - The first consecutive y data monotonically increase to reach the expiration-inspiration trigger threshold A - Judging to enter an expiration state; reaching an inhale-exhale trigger threshold B - The first successive y detection data monotonically decrease to reach the inspiration-expiration trigger threshold B - If so, judging to enter an air suction state;
step 7, calculating the corresponding relation and calculating the pressure difference p between the inside and the outside of the mask - Corresponding relation with the gas flow L and the respiratory frequency F of the mask; the purpose of this step is to bring the mask to a pressure difference p between the inside and the outside - Corresponding to the gas flow L and the respiratory frequency F of the mask, the gas flow of the mask can be calculated only by measuring the internal and external pressure difference and the respiratory frequency, and the respiratory capacity is further calculated. Compared with other measuring modes, the pressure measuring method only collects pressure, and is more beneficial to practical application and implementation.
Step 8, calculating the respiratory volume, and calculating the respiratory volume T of the expiratory interval based on the pressure difference;
step 9, calculating the internal and external reference pressure difference p -* Calculating the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval by taking the respiration volume T of the current expiration interval as the respiration volume of the current inspiration interval -* (ii) a The purpose of this step lies in, exhale interval and inspiration interval respiratory volume nearly unanimous, and inspiration interval is because the air supply of send machine, and actual inspiration interval respiratory volume is difficult to measure, regards current expiration interval respiratory volume as the respiratory volume of current inspiration interval, and the actual operation is got up more simply accurately, and further can be more simple convenient calculation internal and external reference pressure differential, more is favorable to actual implementation.
Step 10, determining a pressure difference instruction value according to the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval -* Sending the pressure difference instruction value r to a microcontroller as the pressure difference instruction value r of the subsequent inspiration time interval, controlling the pressure in the mask by the microcontroller according to the pressure difference r, and solving the reference pressure difference p between the inside and the outside of the mask in the inspiration interval every X periods -* Determining a pressure difference instruction value of a subsequent air suction time interval;
step 11, controlAccording to the difference p between the pressure of the gas inside the mask and the pressure of the gas outside the mask - And judging the current exhalation state, controlling the mask fan to stop running by the microcontroller when the exhalation state is the exhalation state, and sending the calculated pressure difference instruction value r to the microcontroller when the inhalation state is the inhalation state, wherein the microcontroller controls the air supply quantity of the fan according to the pressure difference instruction value r as a control value to keep the pressure difference between the inside and the outside of the mask at the control value.
Preferably, the method collects the pressure difference of the gas inside and outside the mask in the breathing process by repeating the step 1 to the step 11, calculates the real-time breathing amount of the operator by the pressure difference inside and outside the mask and the breathing rate, calculates the real-time pressure difference control instruction value by the breathing amount, and pre-judges the breathing state and the breathing state of the operator by the mask in advance, so that the air supply state of the mask fan is adjusted in time, and the following of the breathing rate and the breathing amount is realized.
In a preferred embodiment, in step 7, the calculation formula for calculating the correspondence relationship is: p is a radical of - ＝δL+γ(F x -F 0 ) Further derivation of
Delta is the flow coefficient, gamma is the frequency coefficient, F x For the current frequency, F 0 Is the reference frequency. The purpose of this step is to accurately calculate the corresponding relationship between the pressure difference inside and outside the mask and the flow rate and respiratory rate of the mask gas as the factor for determining the pressure difference instruction value.
In a preferred embodiment, in step 8, the respiratory rate T is calculated by the formula T ═ L × T Calling device ，t Calling device The microcontroller calculates the average pressure difference in the expiration time for the expiration time of the current respiration interval, and the respiration frequency is calculated by the microcontroller according to the pressure difference change. The purpose of this step is to calculate the respiration rate in the expiratory interval by differential pressure calculation, so as to obtain the internal and external reference differential pressure in the inspiratory interval.
In a preferred embodiment, in step 9, the breathing volume T of the current exhalation interval is used as the breathing volume of the current inhalation interval, and the reference pressure difference p between the inside and the outside of the mask in the current inhalation interval is calculated -* Is calculated as p -* ＝δL+γ(F x -F 0 )，
Further calculate p -* ，t Suction device For the inspiration time of the current breath interval, the reference frequency F 0 The value is 12. The purpose of this step is to calculate the reference pressure difference between the inside and outside of the mask in the inspiration interval as the pressure difference instruction value for determining the subsequent inspiration time interval.
In a preferred scheme, in the step 5, the pre-judgment regulating coefficient alpha is in a range of 0.9-1, and the beta value range is in a range of 1-1.1.
In a preferred scheme, the flow coefficient delta is 0.12, and the frequency coefficient gamma is 0.04.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (6)
1. A mask breathing following control method capable of following the breathing volume is characterized by comprising the following steps:
step 1, collecting pressure values, namely collecting gas pressure in a mask and gas pressure outside the mask;
step 2, calculating the pressure difference, and calculating the difference p between the gas pressure in the mask and the gas pressure outside the mask - ；
Step 3, taking an average value, and taking the difference value p between the internal pressure and the external pressure of the mask in X periods in every X periods - Accumulating the difference between the internal pressure and the external pressure of the mask, and calculating the average value of the difference between the internal pressure and the external pressure of the mask in X periods
X is a natural number more than or equal to 1;
step 4, settingBreath judgement value, as the average value of the difference between the internal and external pressures of the mask in X cycles
As the respiration judgment value D of the next period;
step 5, setting a trigger threshold, namely setting an expiration-inspiration trigger threshold A - Inspiratory-expiratory trigger threshold B - ，A - ＝αD；B - β D, where α and β are predetermined adjustment coefficients;
step 6, judging the state, and reaching an expiration-inspiration trigger threshold A - The first successive y data monotonically increase to reach the expiratory-inspiratory trigger threshold A - Judging to enter an expiration state; reaching an inhale-exhale trigger threshold B - The first successive y detection data monotonically decrease to reach the inspiration-expiration trigger threshold B - If so, judging to enter an air suction state;
step 7, calculating the corresponding relation and calculating the pressure difference p between the inside and the outside of the mask - Corresponding relation with the gas flow L and the respiratory frequency F of the mask;
step 8, calculating the respiratory volume, and calculating the respiratory volume T of the expiratory interval based on the pressure difference;
step 9, calculating the internal and external reference pressure difference p -* Calculating the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval by taking the respiration volume T of the current expiration interval as the respiration volume of the current inspiration interval -* ；
Step 10, determining a pressure difference instruction value according to the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval -* Sending the pressure difference instruction value r to a microcontroller as the pressure difference instruction value r of the subsequent inspiration time interval, controlling the pressure in the mask by the microcontroller according to the pressure difference r, and solving the reference pressure difference p between the inside and the outside of the mask in the inspiration interval every X periods -* Determining a pressure difference instruction value of a subsequent air suction time interval;
step 11, controlling according to the difference value p between the gas pressure in the mask and the gas pressure outside the mask - Judging the current breath state, controlling the mask fan to stop running when the breath state is detected, and calculating the pressure difference instruction when the breath state is detectedThe value r is sent to a microcontroller, and the microcontroller controls the air supply quantity of the fan according to the differential pressure instruction value r as a control value, so that the internal and external differential pressures of the mask are kept at the control value.
2. The mask breath follow control method of the follow able breath volume as set forth in claim 1, wherein: in step 7, the calculation formula for calculating the corresponding relationship is: p is a radical of - ＝δL+γ(F x -F 0 ) Further derivation of
Delta is the flow coefficient, gamma is the frequency coefficient, F x For the current frequency, F 0 Is the reference frequency.
3. The mask breath follow control method of the follow able breath volume as set forth in claim 1, wherein: in step 8, the respiration rate T is calculated as T ═ L × T Calling device ，t Calling device The microcontroller calculates the average pressure difference in the expiration time for the expiration time of the current respiration interval, and the respiration frequency is calculated by the microcontroller according to the pressure difference change.
4. The mask breath follow control method of the follow able breath volume as set forth in claim 1, wherein: in step 9, the breathing volume T of the current expiration interval is used as the breathing volume of the current inspiration interval, and the reference pressure difference p between the inside and the outside of the mask in the current inspiration interval is calculated -* Is calculated as p -* ＝δL+γ(F x -F 0 )，
Further calculate p -* ，t Suction device For the inspiration time of the current breath interval, the reference frequency F 0 The value is 12.
5. The mask breath follow control method of the follow able breath volume as set forth in claim 1, wherein: in step 5, the pre-determined adjustment coefficient alpha is within a range of 0.9-1, and the beta value is within a range of 1-1.1.
6. The mask breath follow control method of the follow able breath volume as set forth in claim 2, wherein: the flow coefficient delta is 0.12 and the frequency coefficient gamma is 0.04.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210295336.XA CN114796911A (en) | 2022-03-24 | 2022-03-24 | Mask breathing following control method capable of following breathing volume |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210295336.XA CN114796911A (en) | 2022-03-24 | 2022-03-24 | Mask breathing following control method capable of following breathing volume |
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| CN202210295336.XA Pending CN114796911A (en) | 2022-03-24 | 2022-03-24 | Mask breathing following control method capable of following breathing volume |
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Application publication date: 20220729 |