CN109316655B - Air supply mask system - Google Patents
Air supply mask system Download PDFInfo
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- CN109316655B CN109316655B CN201710637371.4A CN201710637371A CN109316655B CN 109316655 B CN109316655 B CN 109316655B CN 201710637371 A CN201710637371 A CN 201710637371A CN 109316655 B CN109316655 B CN 109316655B
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- air supply
- pressure
- mask
- pwm duty
- respiratory
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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
- A61M16/06—Respiratory or anaesthetic masks
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
-
- 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
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
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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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
-
- 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
Abstract
The invention relates to the field of personal protection devices, and provides an air supply mask system, which comprises: a mask body; the acquisition unit is used for acquiring respiratory data of the inner side of the mask main body; the air supply unit is used for supplying air to the inner side of the mask main body; the processor is connected with the acquisition unit and the air supply unit; and the storage medium stores a plurality of instructions, and when the instructions are executed by the processor, the processor receives the respiratory data acquired by the acquisition unit and controls the air supply amount output by the air supply unit to the mask main body according to the respiratory data. The invention also provides an air supply control method of the air supply mask system. The air supply mask system adopts the absolute pressure sensor to acquire the respiratory pressure, thereby reducing the cost and improving the application range; the invention can judge the breathing state according to the breathing pressure of the inner side of the mask main body and control the air supply volume according to the breathing state.
Description
Technical Field
The invention relates to the field of personal protection devices, in particular to an air supply mask system and an air supply control method.
Background
The air supply mask system comprises various air supply masks, such as an air supply mask which is applied to haze prevention at present and a respirator mask. To meet the breathing needs of the user, air delivery mask systems typically include an air delivery unit. Some current air supply mask systems also include a breath detection unit, which opens and closes the air supply unit by detecting the breath inside the mask, thereby expanding the application range of the air supply mask system. At present, the most common breath detection unit is a pressure sensor, the pressure sensor is used for detecting the pressure parameter of the inner side of the face mask, and the air supply unit is adjusted according to the pressure parameter, so that air supply control is realized. However, the pressure sensor in the prior art is expensive, so that the air supply mask system is expensive in manufacturing cost and high in cost, and the application range of the air supply mask system is limited.
The invention aims to provide an air supply mask system and an air supply control method, wherein an absolute pressure sensor is arranged on the system, the breathing pressure of the inner side of a mask body can be determined by measuring the breathing absolute pressure of the inner side of the mask body and the current ambient atmospheric pressure, the breathing state of the inner side of the mask body is judged according to the breathing pressure, and the air supply quantity is controlled according to the breathing state.
Disclosure of Invention
The invention aims to provide an air supply mask system and an air supply control method, which are used for solving the problems of high cost, difficulty in controlling air supply quantity and the like of the air supply mask system.
It is a first object of the present invention to provide a blower mask system comprising:
a mask body;
the acquisition unit is used for acquiring respiratory data of the inner side of the mask main body;
the air supply unit is used for supplying air to the inner side of the mask main body;
the processor is connected with the acquisition unit and the air supply unit;
and the storage medium stores a plurality of instructions, and when the instructions are executed by the processor, the processor receives the respiratory data acquired by the acquisition unit and controls the air supply amount output by the air supply unit to the mask main body according to the respiratory data.
Further, the collection unit comprises a first insulation pressure sensor, and the collection end of the first insulation pressure sensor is positioned on the inner side of the mask main body.
Further, the collection unit also comprises a second absolute pressure sensor, and the collection end of the second absolute pressure sensor is positioned outside the mask main body.
A second object of the present invention is to provide a method for controlling air supply of an air supply mask system, including the steps of:
s1, acquiring respiratory pressure, wherein the respiratory pressure is the difference between respiratory absolute pressure acquired in real time and ambient atmospheric pressure;
the breathing absolute pressure is a pressure value acquired by the first absolute pressure sensor after the mask body is worn; the ambient atmospheric pressure is a pressure value acquired by the first insulation pressure sensor before the mask main body is worn;
and S2, determining the output air volume of the air supply unit according to the breathing pressure, wherein the output air volume is controlled by the PWM duty ratio output to the air supply unit.
A third object of the present invention is to provide a method for controlling air supply of an air supply mask system, including the steps of:
s1, acquiring respiratory pressure, wherein the respiratory pressure is the difference between respiratory absolute pressure acquired in real time and ambient atmospheric pressure;
the breathing absolute pressure is a pressure value acquired by the first absolute pressure sensor after the mask body is worn; the ambient atmospheric pressure is a pressure value acquired by the second absolute pressure sensor;
and S2, determining the output air volume of the air supply unit according to the breathing pressure, wherein the output air volume is controlled by the PWM duty ratio output to the air supply unit.
Further, the PWM duty cycle includes an exhalation PWM duty cycle and an inhalation PWM duty cycle, the exhalation PWM duty cycle is 50%, and the inhalation PWM duty cycle is 70% to 90%.
Further, the step S2 includes the following steps:
s21, calculating a pressure difference, wherein the pressure difference is the difference between the respiratory pressure acquired in the first 50 milliseconds of the current time and the current respiratory pressure;
s22, when the current pressure is smaller than an inspiratory pressure threshold and the pressure difference is smaller than an inspiratory slope threshold, determining the PWM duty ratio as an inspiratory PWM duty ratio; when the current pressure is larger than an inspiratory pressure threshold and the pressure difference is larger than an expiratory slope threshold, determining the PWM duty ratio as an expiratory PWM duty ratio; the inspiratory pressure threshold is 11033-; the inspiratory slope threshold is-12.
The air supply mask system provided by the invention adopts the absolute pressure sensor to acquire the respiratory pressure, and effectively reduces the cost of the air supply mask system on the basis of ensuring the accuracy, thereby increasing the application range of the air supply mask system. According to the invention, the breathing pressure is collected in real time, and the air supply quantity can be automatically controlled according to the breathing state.
Drawings
FIG. 1 is a schematic view of the structure of a blower mask according to a first embodiment of the present invention.
FIG. 2 is a schematic view of a second embodiment of a blower mask system according to the present invention.
Fig. 3 is a graph of PWM duty ratio output to the air supply unit versus pressure inside the mask body when the mask body is worn and breathing normally.
FIG. 4 is a graph of pressure inside the mask body versus time when the mask body is worn and not ventilated.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
Mask systems in this specification include, but are not limited to, haze-proof masks, respiratory masks, and the like. The term "inboard" refers to the side of the mask body that contacts the user's face, and "outboard" refers to the side of the mask body that contacts the outside air.
A first embodiment of the present invention provides a blower mask system comprising a mask body;
the acquisition unit is used for acquiring respiratory data of the inner side of the mask main body;
the air supply unit is used for supplying air to the inner side of the mask main body;
the processor is connected with the acquisition unit and the air supply unit;
and the storage medium stores a plurality of instructions, and when the instructions are executed by the processor, the processor receives the respiratory data acquired by the acquisition unit and controls the air supply amount output by the air supply unit to the mask main body according to the respiratory data.
Specifically, as shown in fig. 1, the air supply mask system of the present invention is an anti-haze air supply mask, and includes a mask body 110, a collection unit 120 disposed inside the mask body 110, an air supply unit 130, and a processor 140. In this embodiment, the collecting unit 120 is an absolute pressure sensor.
The processor 140 of the present embodiment is connected to the absolute pressure sensor and the blowing unit 130. When the haze-preventing air supply mask is not worn, the pressure detected by the absolute pressure sensor is the ambient atmospheric pressure; after antifog haze air supply mask wears, the pressure that detects through the absolute pressure sensor is breathing absolute pressure, breathing absolute pressure with the difference of environment atmospheric pressure can be used to characterize breathing pressure, processor 140 is through receiving breathing pressure to according to breathing pressure control air supply unit 130.
The air supply mask system of the embodiment is simple in structure, the absolute pressure sensor is used as the breath collecting unit, the collecting result is accurate, the cost is low, and the application range of the air supply mask system is expanded.
As shown in fig. 2, a second embodiment of the present invention provides a respirator, which comprises a breathing pipe 211, a mask body (not shown in the figure) connected to the end of the breathing pipe 211; a first absolute pressure sensor 221 for acquiring the absolute pressure of respiration in the respiratory tract, a second absolute pressure sensor 222 for acquiring the ambient atmospheric pressure; an air supply unit (not shown in the figure) that supplies air to the inside of the mask body; and a processor connected to the first and second absolute pressure sensors 221 and 222 and the air blowing unit, respectively.
The blowing mask system of the present embodiment collects the absolute pressure of breathing and the ambient atmospheric pressure by providing the first absolute pressure sensor 221 and the second absolute pressure sensor 222, respectively, so that the breathing pressure can be obtained. Compared with the first embodiment, the present embodiment does not need to additionally collect the ambient atmospheric pressure before the mask is worn, thereby simplifying the use steps of the air supply mask system.
A third embodiment of the present invention provides a control method for the blower mask system of the first embodiment, including the steps of:
s1, acquiring respiratory pressure, wherein the respiratory pressure is the difference between respiratory absolute pressure acquired in real time and ambient atmospheric pressure; the breathing absolute pressure is a pressure value acquired by the acquisition unit after the mask body is worn, and the ambient atmospheric pressure is a pressure value acquired by the acquisition unit before the mask body is worn;
and S2, determining the output air volume of the air supply unit according to the breathing pressure, wherein the output air volume is controlled by the PWM duty ratio output to the air supply unit.
Further, the PWM duty cycle includes an exhalation PWM duty cycle and an inhalation PWM duty cycle, the exhalation PWM duty cycle is 50%, and the inhalation PWM duty cycle is 70% to 90%. It should be noted that the air volume adjustment of the present embodiment includes two modes, when it is detected that the inner side of the mask body is in an exhalation state, the processor controls to output an exhalation PWM duty ratio to the air supply unit; and when the inner side of the mask body is detected to be in a suction state, the processor controls to output suction PWM duty ratio to the air supply unit.
Further, the step S2 includes the following steps:
s21, calculating a pressure difference, wherein the pressure difference is the difference between the respiratory pressure acquired in the first 50 milliseconds of the current time and the current respiratory pressure;
s22, when the current pressure is smaller than an inspiratory pressure threshold and the pressure difference is smaller than an inspiratory slope threshold, determining the PWM duty ratio as an inspiratory PWM duty ratio; when the current pressure is larger than an inspiratory pressure threshold and the pressure difference is larger than an expiratory slope threshold, determining the PWM duty ratio as an expiratory PWM duty ratio; the inspiratory pressure threshold is 11033-; the inspiratory slope threshold is-12.
In this embodiment, after the user wears the mask, when different PWM duty ratios are output to the air supply unit, the inspiratory pressure threshold, the expiratory slope threshold, and the inspiratory slope threshold are calculated according to the PWM duty ratio-respiratory pressure curve by acquiring the respiratory pressure.
When the upper mask body is worn but the breathing is not performed on the inner side of the mask body, the PWM duty ratio output to the air supply unit is adjusted, meanwhile, the pressure on the inner side of the mask body is collected, a curve of the PWM duty ratio and the pressure on the inner side of the mask body is obtained, and the curve is fitted as shown in fig. 3, so that the inhalation pressure threshold value is 11033-.
When the upper mask main body is worn and the air supply unit is not started, acquiring a pressure curve of the inner side of the mask main body as shown in fig. 4, taking pressures at the beginning of expiration and the beginning of expiration for 50ms, and calculating to obtain an expiration slope threshold value which is-9.1; and (4) taking the starting inspiration point and the pressure 50ms after the starting inspiration point, and calculating to obtain an inspiration slope threshold value of-12.
A fourth embodiment of the present invention provides a control method for a system of a blower mask according to the second embodiment, which is different from the third embodiment only in that in step S1, the ambient atmospheric pressure is the pressure sensed by the second absolute pressure sensor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. A blower mask system, comprising:
a mask body;
the acquisition unit comprises a first insulation pressure sensor and a second insulation pressure sensor, and the acquisition end of the first insulation pressure sensor is positioned on the inner side of the mask main body and is used for acquiring first respiratory data on the inner side of the mask main body; the acquisition end of the second absolute pressure sensor is positioned outside the mask body and used for acquiring second respiratory data outside the mask body;
the air supply unit is used for supplying air to the inner side of the mask main body;
the processor is connected with the acquisition unit and the air supply unit;
the storage medium stores a plurality of instructions, and when the instructions are executed by the processor, the processor receives the breathing pressure and controls the air supply volume output by the air supply unit into the mask main body according to the breathing pressure; the output air supply volume is controlled by the PWM duty ratio output to the air supply unit; the respiratory pressure is a difference value between first respiratory data and second respiratory data, the PWM duty cycle comprises an expiration PWM duty cycle and an inspiration PWM duty cycle, the expiration PWM duty cycle is 50%, and the inspiration PWM duty cycle is 70% -90%;
when the current respiratory pressure is smaller than an inspiratory pressure threshold and the pressure difference is smaller than an inspiratory slope threshold, determining the PWM duty ratio as an inspiratory PWM duty ratio; when the current respiratory pressure is larger than an inspiratory pressure threshold and the pressure difference is larger than an expiratory slope threshold, determining the PWM duty ratio as an expiratory PWM duty ratio; the pressure difference is the difference between the respiratory pressure obtained at the first 50 milliseconds of the current time and the current respiratory pressure; the inspiratory pressure threshold is 11033-; the inspiratory slope threshold is-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710637371.4A CN109316655B (en) | 2017-07-31 | 2017-07-31 | Air supply mask system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710637371.4A CN109316655B (en) | 2017-07-31 | 2017-07-31 | Air supply mask system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109316655A CN109316655A (en) | 2019-02-12 |
| CN109316655B true CN109316655B (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710637371.4A Active CN109316655B (en) | 2017-07-31 | 2017-07-31 | Air supply mask system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110780948B (en) * | 2019-10-23 | 2023-12-08 | 深圳市华盛昌科技实业股份有限公司 | Method for adjusting air quantity in mask and mask |
| CN111166335A (en) * | 2019-12-31 | 2020-05-19 | 深圳大学 | Absolute pressure sensor assembly and air bag type respiration measuring device |
| CN114768135A (en) * | 2022-03-24 | 2022-07-22 | 湖北华强科技股份有限公司 | Breathing following type air supply control system and method for gas mask |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10161057A1 (en) * | 2001-12-12 | 2003-07-10 | Heptec Gmbh | Process for controlling the differential pressure in a CPAP device and CPAP device |
| CN102107037A (en) * | 2009-12-28 | 2011-06-29 | 周常安 | Air delivery system |
| CN103330979B (en) * | 2013-05-30 | 2016-04-20 | 中山大学 | The respirator of a kind of respirator control method and application controls method |
| US10449320B2 (en) * | 2013-10-15 | 2019-10-22 | Fisher & Paykel Healthcare Limited | Sensing and control arrangements for respiratory device |
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| CN109316655A (en) | 2019-02-12 |
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Address after: Longgang District of Shenzhen City, Guangdong province 518116 Longgang Street Community 6 new road bridge Baolong Baolong Industrial Park building B building 1-3 floor Applicant after: Shenzhen meimeimeichuangyi Medical Technology Co., Ltd Address before: Longgang District of Shenzhen City, Guangdong province 518116 Longgang Street Community 6 new road bridge Baolong Baolong Industrial Park building B building 1-3 floor Applicant before: MEHOW INNOVATIVE Ltd. |
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