CN116733724B - Sinusoidal oscillation airflow generation method and device - Google Patents
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- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/085—Measuring impedance of respiratory organs or lung elasticity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
- F15C3/00—Circuit elements having moving parts
- F15C3/16—Oscillators
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Abstract
The invention is applicable to the field of lung function detectors, and provides a sinusoidal oscillation airflow generation method and device, wherein the sinusoidal oscillation airflow generation device comprises the following components: the device comprises a first cylinder assembly, a second cylinder assembly, a rotor and a driving assembly; the air outlet end of the first air cylinder assembly is connected with an air channel, and the air outlet end of the second air cylinder assembly is also connected with the air channel; the driving assembly is in transmission connection with the rotor and is used for driving the rotor to rotate at a constant speed; the outer peripheral surface of the rotor is set to be a sine generating curved surface, the rotor can rotate at a constant speed, the sine generating curved surface can drive the first cylinder assembly and the second cylinder assembly to alternately breathe/inhale to generate sine oscillation airflow, and the sine oscillation airflow is conveyed to the air path channel. The invention can generate high-fidelity sinusoidal oscillation airflow and provide a reliable gas oscillation source for the forced oscillation lung function detection device.
Description
Technical Field
The invention belongs to the field of lung function detectors, and particularly relates to a sinusoidal oscillation airflow generation device and method.
Background
In recent years, the incidence of chronic respiratory diseases such as asthma and Chronic Obstructive Pulmonary Disease (COPD) has been increasing due to environmental pollution, smoking, passive smoking, and the like. The lung function test is an important tool for diagnosing chest and lung diseases and evaluating the treatment effect. Studies have shown that COPD can be diagnosed at an early stage, and that prevention of exacerbations of COPD disease can be optimally achieved by early intervention and prevention.
Traditional pulmonary function tests require a high degree of coordination of the subject with the instructions of the doctor to complete an effective test, which is not conducive to the popularization of clinical applications of pulmonary function detection and is not well suited for elderly, children, hearing impaired and mental retardation patients. The oscillation method lung function detection is a novel lung function detection technology for measuring human respiratory impedance based on a forced oscillation technology, does not need an active coordination of a subject, can distinguish the respiratory system lesion caused by smoking in the early clinical stage by distinguishing the respiratory phase and the expiratory phase resistance change, and has been listed as a recommended lung function detection method by the European Respiratory Society (ERS).
The principle of forced oscillation lung function detection technology is that electromagnetic pulse is usually generated by an external generator, converted into mechanical waves with various frequencies through a loudspeaker, then applied to resting breath of a subject, and impedance measurement values under various oscillation frequencies are obtained through signal processing and analysis technologies such as system identification and the like by continuously recording pressure and flow rate through an airway during spontaneous breath. However, in practical applications the following problems exist with the generation of oscillating airflow by the speaker: the loudspeaker has poor response to low frequency, and is difficult to generate high-fidelity low-frequency oscillation airflow; the loudspeaker often has a relatively large final oscillating device volume due to stroke limitations in order to produce 40mL of oscillating airflow within 40 ms. Therefore, there is a need to design a device that is small and capable of generating a high fidelity oscillatory flow.
Disclosure of Invention
The embodiment of the invention aims to provide a sinusoidal oscillation airflow generating device which can generate high-fidelity sinusoidal oscillation airflow and provide a reliable gas oscillation source for a forced oscillation lung function detecting device; the problem that in the prior art, the low-frequency response is poor and the high-fidelity low-frequency oscillation airflow is difficult to generate due to the fact that the oscillation airflow is generated by a loudspeaker can be solved; the speaker is limited by stroke, and in order to meet the problem that 40mL of oscillating airflow is generated within 40ms, the final oscillating device is often large in size.
The embodiment of the invention is realized in that a sinusoidal oscillation airflow generating device comprises: the device comprises a first cylinder assembly, a second cylinder assembly, a rotor and a driving assembly;
the air outlet end of the first air cylinder assembly is connected with an air channel, and the air outlet end of the second air cylinder assembly is also connected with the air channel;
The driving assembly is in transmission connection with the rotor and is used for driving the rotor to rotate at a constant speed;
The outer peripheral surface of the rotor is set to be a sine generating curved surface, the rotor can rotate at a constant speed, the sine generating curved surface can drive the first cylinder assembly and the second cylinder assembly to alternately breathe/inhale to generate sine oscillation airflow, and the sine oscillation airflow is conveyed to the air path channel.
Another object of an embodiment of the present invention is to provide a sinusoidal oscillation airflow generating method, for the sinusoidal oscillation airflow generating device, the method including:
The rotor is driven to rotate at a constant speed through the driving component;
the rotor drives the first cylinder component and the second cylinder component to alternately breathe/inhale through the sine generating curved surface to generate sine oscillation airflow, and the sine oscillation airflow is conveyed to the air path channel.
According to the sinusoidal oscillation airflow generating device provided by the embodiment of the invention, the rotor with the sinusoidal generation curved surface is arranged to drive the first air cylinder component and the second air cylinder component which are contacted with the rotor to reciprocate, so that alternate breathing/inhaling is realized, sinusoidal oscillation airflow with high fidelity can be generated, and the sinusoidal oscillation airflow is conveyed to the air path channel, so that a reliable gas oscillation source is provided for the forced oscillation lung function detecting device.
Drawings
FIG. 1 is a schematic diagram of a sinusoidal oscillation airflow generating device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a rotor according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for generating sinusoidal oscillation airflow according to an embodiment of the present invention;
In the accompanying drawings: 100-motor; 110-rotor; 120-driver; 130-a regulated power supply; 200-a first cylinder assembly; 201-a first piston rod; 202-a first piston; 203-a first cylinder; 204-a first intake check valve; 205-a first outlet one-way valve; 210-a second cylinder assembly; 211-a second piston rod; 212-a second cylinder; 213-a second piston; 214-a second inlet check valve; 215-a second outlet one-way valve; 300-gas path channel.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
As shown in fig. 1, a structure diagram of a sinusoidal oscillation airflow generating device according to an embodiment of the present invention includes: a first cylinder assembly 200, a second cylinder assembly 210, a rotor 110, and a drive assembly;
The air outlet end of the first cylinder assembly 200 is connected with an air channel 300, and the air outlet end of the second cylinder assembly 210 is also connected with the air channel 300;
The driving assembly is in transmission connection with the rotor 110 and is used for driving the rotor 110 to rotate at a constant speed;
The outer circumferential surface of the rotor 110 is configured as a sinusoidal curved surface, and the uniform rotation of the rotor 110 can drive the first cylinder assembly 200 and the second cylinder assembly 210 to alternately breathe/inhale through the sinusoidal curved surface to generate a sinusoidal oscillating airflow, and the sinusoidal oscillating airflow is delivered to the air path channel 300.
In this embodiment, the rotor 110 is a structure with a brand new design, the outer peripheral surface of the rotor 110 is set to be a sinusoidal curved surface, the sinusoidal curved surface follows the periodic characteristic of the sinusoidal curve, and the rotor 110 with the sinusoidal curved surface can simply utilize the constant angular velocity characteristic of the rotor 110 to drive the first cylinder assembly 200 and the second cylinder assembly 210 in contact with the rotor to reciprocate, so that alternating breathing/inhalation can generate a sinusoidal oscillation airflow with high fidelity, and the sinusoidal oscillation airflow is conveyed to the air channel 300, so as to provide a reliable gas oscillation source for the forced oscillation lung function detection device. In addition, since the rotor 110 is operated at a constant angular velocity, there is no need to provide a complicated driving control to change the rotational speed, and sinusoidal oscillation is generated by the structure of the rotor 110 itself, which is more reliable and stable than the oscillating airflow generated by the speaker.
The air channel 300 in this embodiment is an air inlet structure of the forced oscillation lung function detection device, and can provide a reliable air oscillation source for the forced oscillation lung function detection device.
In one example of this embodiment, the air channel 300 may be a section of pipe, and an interface is formed on a pipe wall of the pipe, and is connected to the air outlet ends of the first cylinder assembly 200 and the second cylinder assembly 210 through the interface, so as to implement conveying of the sinusoidal oscillation airflow.
As shown in fig. 2, in one embodiment, an x, y axis coordinate system is established with the center of the rotor 110, and the position (x (θ), y (θ)) of any point on the outer peripheral surface of the rotor 110 satisfies the following condition:
x(θ)＝(R+(1-cos(θ*2))*L)*cos(θ) (1)；
y(θ)＝(R+(1-cos(θ*2))*L)*sin(θ) (2)；
Where θ is the angle between the line from the point to the origin of coordinates and the x-axis, R, L is a constant, characterizing (or determining) the size of rotor 110.
For example: when r=2cm, l=3cm, and the piston radius r=4cm,
If θ is 0 °, the point (x (0 °), y (0 °)) is (2, 0) from the formulas (1) and (2);
If θ is 30 °, the point (x (30 °), y (30 °)) can be obtained from the formulas (1) and (2)
If θ is 45 °, the point (x (45 °), y (45 °)) can be obtained from the formulas (1), (2)
If θ is 60 °, the point (x (60 °), y (60 °)) can be obtained from the formulas (1) and (2)
If θ is 90 °, the point (x (90 °), y (90 °)) is (0, 8) from the formulas (1) and (2).
Similarly, the position of any point on the outer circumferential surface of the rotor 110 can be obtained by the formula (1) and the formula (2); further, the geometric parameters of the sinusoidal generation curved surface of the rotor 110 can be obtained.
In some examples, the dimension of the rotor 110 may be other dimension parameters, that is, R, L may be other constant values, which are not described in detail herein.
In summary, in the process of driving the first cylinder assembly 200 and the second cylinder assembly 210 to generate the airflow by the rotor 110, the rotor 110 provided in the embodiment realizes the constant generation of the sinusoidal oscillation airflow by the sinusoidal generation curved surface structure of the rotor 110 rather than by the current variation control of the complex driver, and the rotor 110 only needs to keep the constant angular velocity to rotate.
As shown in fig. 1, in one embodiment, the first cylinder assembly 200 includes at least a first cylinder 203 and a first piston 202;
The first piston 202 is disposed in the first cylinder 203 and is in sliding fit with the first cylinder 203, and the first piston 202 abuts against the sinusoidal curved surface of the rotor 110 through a first piston rod 201;
the first cylinder 203 is provided with an air outlet to form an air outlet end of the first cylinder assembly 200, the first cylinder 203 is further provided with an air inlet, and the air inlet and the air outlet are provided with one-way valves.
In one example of the present embodiment, the check valves disposed on the air inlet and the air outlet of the first cylinder 203 are the first air inlet check valve 204 and the first air outlet check valve 205, respectively; wherein the first air inlet check valve 204 allows only the external air to enter the first cylinder 203 in one direction, and the first air outlet check valve 205 allows only the air in the first cylinder 203 to enter the air path passage 300 in one direction.
In one example of the present embodiment, the second cylinder assembly 210 includes a second cylinder 212 and a second piston 213;
The second piston 213 is disposed in the second cylinder 212 and is in sliding fit with the second cylinder 212, and the second piston 213 abuts against the sinusoidal curved surface of the rotor 110 through the second piston rod 211;
In an example of this embodiment, the air inlet and the air outlet of the second cylinder 212 are also provided with check valves, which are a second air inlet check valve 214 and a second air outlet check valve 215 respectively; wherein the second inlet check valve 214 allows only the external air to enter the second cylinder 212 in one direction, and the second outlet check valve 215 allows only the air in the second cylinder 212 to enter the air path channel 300 in one direction.
The first air inlet check valve 204, the first air outlet check valve 205, the second air inlet check valve 214, and the second air outlet check valve 215 cooperate with the rotor 110 to generate a sinusoidal oscillation airflow.
In one embodiment, the position where the second piston rod 211 abuts against the sinusoidal curved surface of the rotor 110 has a certain periodic interval from the position where the first piston rod 201 abuts against the sinusoidal curved surface of the rotor 110.
In one example of this embodiment, the period interval described above is a period of pi/2.
In one example of this embodiment, as shown in fig. 1, the thread in the first cylinder 203 that allows the first piston 202 to move may be represented by points a and B; the thread in second cylinder 212 that allows movement of second piston 213 may be represented by points a ', B'.
In this example, the process of driving the first cylinder assembly 200 and the second cylinder assembly 210 by the rotor 110 to generate the air flow, taking the example of the piston radius r=4cm of the first piston 202 and the second piston 213, specifically includes:
The rotor 110 rotates at a constant speed, the angular speed is omega, and the first piston 202 is driven to move through the rolling friction between the rotor 110 and the first piston rod 201, so that the first piston 202 moves between the point A and the point B according to the sine speed v; meanwhile, the second piston 213 is driven to move by rolling friction of the rotor 110 with the second piston rod 211, so that the second piston 213 moves between the a 'point and the B' point at a sinusoidal speed v, which is specifically:
v＝(R+(1-cos(ω*2))*L)′＝2Lsin(2ω) (3)，
When the first piston 202 moves from the point A to the point B, the second piston 213 moves from the point B 'to the point A', the first air intake check valve 204 is opened, and the outside air enters the first cylinder 203; simultaneously, the second air outlet check valve 215 is opened, the air in the second air cylinder 212 enters the air channel 300, the air flow speed curve is a sine curve, and the total amount of the generated air in the process of moving from the point B 'to the point A' of the second piston 213 is as follows:
πr2*2L＝301(mL)；
When the first piston 202 moves from the point B to the point A, the second piston 213 moves from the point A 'to the point B', the second air inlet check valve 214 is opened, and the external air enters the second cylinder 212; simultaneously, the first air outlet one-way valve 205 is opened, the air in the first air cylinder 203 enters the air channel 300, and the air flow speed curve is a sine curve; the total amount of gas generated in the process of moving the first piston 202 from the point B to the point A is as follows:
πr2*2L＝301(mL)。
therefore, when the frequency of the generated sinusoidal oscillation airflow is at least 4Hz, the total amount of generated gas is 1204mL in 1 second, and the designed performance requirement can be met.
In one embodiment, a first return spring is disposed between the first piston 202 and the first cylinder 203, and a second return spring is disposed between the second piston 213 and the second cylinder 212.
In this embodiment, the first piston 202 is assisted to reset by the first reset spring, so as to ensure that the first piston 202 can reciprocate under the driving of the rotor 110, and the second piston 213 is assisted to reset by the second reset spring, so as to ensure that the second piston 213 can reciprocate under the driving of the rotor 110.
In one embodiment, the driving assembly includes a motor 100 and a driver 120, the motor 100 is in transmission connection with the rotor 110, the driver 120 is electrically connected with a regulated power supply 130 and the motor 100, and the driver 120 is used for controlling the motor 100 to drive the rotor 110 to move at a uniform speed.
In an example of this embodiment, the motor 100 is connected to the rotor 110 in a driving manner by a pulley and a belt, or by a driving manner by a plurality of gears meshed with each other, which is a conventional technical means in the art, and will not be described in detail herein.
In this embodiment, the driver 120 may be an ac servo motor driver commonly used in the market, and the motor 100 is driven to operate by the ac servo motor driver; the regulated power supply 130 plays a role in providing stable voltage, prevents the motor 100 from being affected by peak fluctuation of the mains supply, and improves the working stability of the motor 100.
In another embodiment, as shown in fig. 3, a sinusoidal oscillation airflow generating method is used for the sinusoidal oscillation airflow generating device as described above, and includes the following steps:
s101, driving the rotor 110 to rotate at a constant speed through a driving assembly;
In this step, the driving assembly includes a motor 100 and a driver 120, the motor 100 is in transmission connection with the rotor 110, the driver 120 is electrically connected with a regulated power supply 130 and the motor 100, and the driver 120 is used for controlling the motor 100 to drive the rotor 110 to move at a uniform speed.
S102, the rotor 110 drives the first cylinder assembly 200 and the second cylinder assembly 210 to alternately breathe/inhale through the sine generating curved surface to generate a sine oscillation airflow, and the sine oscillation airflow is conveyed to the air path channel 300.
In one example of the present embodiment, the first cylinder assembly 200 includes at least a first cylinder 203 and a first piston 202, the first piston 202 is disposed in the first cylinder 203 and slidingly engaged with the first cylinder 203, and the first piston 202 abuts against the sinusoidal curved surface of the rotor 110 through a first piston rod 201;
The rotor 110 rotates at a constant angular velocity ω, and the first piston 202 moves in the first cylinder 203 at a sinusoidal velocity v that satisfies the above equation (3).
As described above, taking the example of the piston radius r=4cm of the first piston 202 and the second piston 213, the generation of the sinusoidal oscillation airflow specifically includes:
The rotor 110 rotates at a constant speed, the angular speed is omega, and the first piston 202 is driven to move through the rolling friction between the rotor 110 and the first piston rod 201, so that the first piston 202 moves between the point A and the point B according to the sine speed v; meanwhile, the second piston 213 is driven to move by the rolling friction of the rotor 110 and the second piston rod 211, so that the second piston 213 moves between the a 'point and the B' point according to the sinusoidal velocity v, which specifically satisfies: the above formula (3);
When the first piston 202 moves from the point A to the point B, the second piston 213 moves from the point B 'to the point A', the first air intake check valve 204 is opened, and the outside air enters the first cylinder 203; simultaneously, the second air outlet check valve 215 is opened, the air in the second air cylinder 212 enters the air channel 300, the air flow speed curve is a sine curve, and the total amount of the generated air in the process of moving from the point B 'to the point A' of the second piston 213 is as follows:
πr2*2L＝301(mL)；
When the first piston 202 moves from the point B to the point A, the second piston 213 moves from the point A 'to the point B', the second air inlet check valve 214 is opened, and the external air enters the second cylinder 212; simultaneously, the first air outlet one-way valve 205 is opened, the air in the first air cylinder 203 enters the air channel 300, and the air flow speed curve is a sine curve; the total amount of gas generated in the process of moving the first piston 202 from the point B to the point A is as follows:
πr2*2L＝301(mL)。
In summary, in the embodiment, when the frequency of the generated sinusoidal oscillation airflow is the lowest 4Hz, the total amount of generated gas is 1204mL in 1 second, so that the problem that the volume of the conventional device for realizing the oscillation airflow through the speaker is too large can be solved, and meanwhile, the sinusoidal oscillation airflow with high fidelity can be generated. Meanwhile, the first cylinder assembly 200 and the second cylinder assembly 210 contacted with the rotor 110 can be driven to reciprocate by simply utilizing the constant angular velocity characteristic of the rotor, and then alternate breathing/inhaling can generate high-fidelity sinusoidal oscillation airflow, and the sinusoidal oscillation airflow is conveyed to the air channel 300, so that a reliable gas oscillation source is provided for the forced oscillation lung function detection device.
The above embodiment of the present invention provides a sinusoidal oscillation airflow generating apparatus, and provides a sinusoidal oscillation airflow generating method based on the sinusoidal oscillation airflow generating apparatus, in which the outer circumferential surface of the rotor 110 is configured as a sinusoidal generation curved surface, the sinusoidal generation curved surface follows the periodic characteristic of the sinusoidal curve, and by the rotor 110 having the sinusoidal generation curved surface, the first cylinder assembly 200 and the second cylinder assembly 210 in contact with each other can be driven to reciprocate by simply using the constant angular velocity characteristic of the rotor 110, and thus alternate breathing/inhalation can generate a sinusoidal oscillation airflow with high fidelity, and the sinusoidal oscillation airflow can be delivered to the gas path channel 300. In addition, since the rotor 110 is operated at a constant angular velocity, there is no need to provide a complicated driving control to change the rotational speed, and sinusoidal oscillation is generated by the structure of the rotor 110 itself, which is more reliable and stable than the oscillating airflow generated by the speaker.
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, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. A sinusoidal oscillation airflow generation apparatus, characterized by comprising: the device comprises a first cylinder assembly, a second cylinder assembly, a rotor and a driving assembly;
the air outlet end of the first air cylinder assembly is connected with an air channel, and the air outlet end of the second air cylinder assembly is also connected with the air channel;
The driving assembly is in transmission connection with the rotor and is used for driving the rotor to rotate at a constant speed;
the outer peripheral surface of the rotor is set to be a sine generating curved surface, the uniform rotation of the rotor can drive the first cylinder assembly and the second cylinder assembly to alternately breathe/inhale through the sine generating curved surface to generate sine oscillation airflow, and the sine oscillation airflow is conveyed to the air path channel;
an x-axis coordinate system and a y-axis coordinate system are established by the center of a rotor, and the positions (x (theta), y (theta)) of any point on the outer peripheral surface of the rotor meet the following conditions:
x(θ)＝(R+(1-cos(θ*2))*L)*cos(θ)；
y(θ)＝(R+(1-cos(θ*2))*L)*sin(θ)；
wherein θ is the angle between the line from the point to the origin of coordinates and the x-axis, R, L is a constant;
The first cylinder assembly comprises at least a first cylinder and a first piston;
the first piston is arranged in the first cylinder and is in sliding fit with the first cylinder, and the first piston is abutted with the sine generating curved surface of the rotor through a first piston rod;
The first cylinder is provided with an air outlet to form an air outlet end of the first cylinder assembly, the first cylinder is also provided with an air inlet, and the air inlet and the air outlet are provided with one-way valves;
The second cylinder assembly comprises a second cylinder and a second piston;
The second piston is arranged in the second cylinder and is in sliding fit with the second cylinder, and the second piston is in butt joint with the sine generating curved surface of the rotor through a second piston rod;
And a position of the second piston rod, which is in contact with the sinusoidal curved surface of the rotor, is a certain periodic interval from a position of the first piston rod, which is in contact with the sinusoidal curved surface of the rotor.
2. The sinusoidal oscillation airflow generating device according to claim 1, wherein a first return spring is provided between the first piston and the first cylinder, and a second return spring is provided between the second piston and the second cylinder.
3. The sinusoidal oscillation airflow generating device according to claim 1, wherein the driving assembly comprises a motor and a driver, the motor is in transmission connection with the rotor, the driver is electrically connected with a stabilized voltage supply and the motor, and the driver is used for controlling the motor to drive the rotor to move at a uniform speed.
4. A sinusoidal oscillation airflow generation method, characterized by being used for the sinusoidal oscillation airflow generation apparatus according to any one of claims 1 to 3, comprising the steps of:
The rotor is driven to rotate at a constant speed through the driving component;
the rotor drives the first cylinder component and the second cylinder component to alternately breathe/inhale through the sine generating curved surface to generate sine oscillation airflow, and the sine oscillation airflow is conveyed to the air path channel.
5. The sinusoidal oscillation airflow generation method of claim 4, wherein said first cylinder assembly comprises at least a first cylinder and a first piston, said first piston being disposed within said first cylinder and in sliding engagement with said first cylinder, said first piston being in abutting engagement with the sinusoidal generating surface of said rotor via a first piston rod;
The angular speed of the rotor rotating at a constant speed is omega, the first piston moves in the first cylinder according to a sinusoidal speed v, and the sinusoidal speed v meets the following conditions:
v＝(R+(1-cos(ω*2))*L)′＝2Lsin(2ω)，
Wherein R, L is a constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310673396.5A CN116733724B (en) | 2023-06-08 | 2023-06-08 | Sinusoidal oscillation airflow generation method and device |
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| CN202310673396.5A CN116733724B (en) | 2023-06-08 | 2023-06-08 | Sinusoidal oscillation airflow generation method and device |
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| CN103071217A (en) * | 2013-02-07 | 2013-05-01 | 天津市医疗器械质量监督检验中心 | Standard sine wave air flow generator for testing breathing machine and anesthetizing system |
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| DE19955778A1 (en) * | 1999-11-19 | 2001-06-13 | Siemens Ag | Multi-cylinder piston pump |
| DE202006007768U1 (en) * | 2006-05-08 | 2006-08-24 | Lorisch, Alfred | Rotary sinusoidal piston engine has cylinder heads with spring or air oscillation dampeners |
| CN100487276C (en) * | 2006-07-19 | 2009-05-13 | 朱瑞林 | Crank link rod mechanism with variable length link rod |
| CN100594954C (en) * | 2007-12-28 | 2010-03-24 | 北京谊安医疗系统股份有限公司 | Electric resuscitator mode control devices and methods thereof |
| MY161500A (en) * | 2009-01-12 | 2017-04-14 | Optimum Power Tech L P | Apparatuses, systems and methods for improved performance of apressurized system |
| CN203123229U (en) * | 2013-02-07 | 2013-08-14 | 天津市医疗器械质量监督检验中心 | Standard sine wave air flow generator for test of respirator and anaesthesia system |
| JP2014233413A (en) * | 2013-05-31 | 2014-12-15 | 独立行政法人国立高等専門学校機構 | Ventilator |
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| CN103071217A (en) * | 2013-02-07 | 2013-05-01 | 天津市医疗器械质量监督检验中心 | Standard sine wave air flow generator for testing breathing machine and anesthetizing system |
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