CN103366625A - Device and control method for simulating spontaneous respiratory movement of human lung - Google Patents

Device and control method for simulating spontaneous respiratory movement of human lung Download PDF

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CN103366625A
CN103366625A CN2013103173972A CN201310317397A CN103366625A CN 103366625 A CN103366625 A CN 103366625A CN 2013103173972 A CN2013103173972 A CN 2013103173972A CN 201310317397 A CN201310317397 A CN 201310317397A CN 103366625 A CN103366625 A CN 103366625A
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simulated lung
lung chamber
simulated
respiratory
lung
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CN103366625B (en
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蒋庆
梁九兴
罗语溪
许煜聪
张彦军
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Sun Yat Sen University
National Sun Yat Sen University
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Abstract

The invention belongs to the field of study on respiratory physiology and discloses a device and control method for simulating the spontaneous respiratory movement of the human lung. The device comprises a simulated lung cavity, springs, a pull rope, a flow sensor, a touch display screen, a motor driver, a direct-current servo motor and a control circuit. The respiratory physiological parameters including the inspiration and expiration ratio, the respiratory rate, the tidal volume and the vital capacity are input through the touch display screen; the flow of air passing by the air change port of the simulated lung cavity is detected by the flow sensor; a motor control signal is triggered by a microcontroller according to the set respiratory parameters and the detected flow signal; further the reeling and the unreeling of the pull rope are controlled by the motor; and finally the respiratory movement of the simulated lung cavity is controlled. The device disclosed by the invention is more in line with the respiratory physiology of the human lung and has extremely high application values in the aspects of scientific research, teaching and respiratory-related product testing.

Description

A kind of simulation people lung autonomous respiration telecontrol equipment and control method
Technical field
The present invention relates to the physiology of respiration medical research field, more specifically, relate to a kind of simulation people lung autonomous respiration telecontrol equipment and control method.
Background technology
Respiratory movement is the process of a complexity, and being used for characterizing respirometric parameter has: inspiratory/expiratory (R I/E), respiratory rate (f Res/ min), the physiology of respiration parameter such as tidal volume (VT), vital capacity (VC).
The device of existing simulation people pulmonary respiratory function is mostly based on manual passive type simulation people lung respiratory movement.This mode is difficult to accomplish precise quantification ground control inspiratory/expiratory (R I/E), respiratory rate (f Res/ min), the physiology of respiration parameter such as tidal volume (VT), vital capacity (VC).
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention at first proposes a kind of device of the people's of simulation lung autonomous respiration campaign, this device meets people's pulmonary respiration physiology more, has high using value in occasions such as scientific experiment research, physiology of respiration teaching, the checks of breathing Related product.
To achieve these goals, its technical scheme is:
A kind of simulation people lung autonomous respiration telecontrol equipment, flow sensor, simulated lung chamber upper substrate, spring, DC servo motor driver, pulley, pulling rope, simulated lung chamber scavenge port, control circuit, fixedly pilum, simulated lung chamber infrabasal plate, DC servo motor, serving bearing, simulated lung bottom substrate and simulated lung chamber;
Described fixedly pilum is arranged on the bottom substrate of simulated lung chamber, simulated lung chamber upper substrate is placed on fixedly on the pilum, described simulated lung chamber is placed between simulated lung chamber bottom substrate and the simulated lung chamber upper substrate, the simulated lung chamber is provided with simulated lung chamber scavenge port, described flow sensor is installed on the scavenge port of simulated lung chamber, the output terminal connection control circuit of flow sensor, control circuit connects the DC servo motor driver; Described spring fitting is between simulated lung chamber upper substrate and simulated lung chamber infrabasal plate and be in extended state; Pulling rope one end is fixed on the infrabasal plate of simulated lung chamber, and the other end is wrapped on the serving bearing of DC servo motor by pulley; DC servo motor driver drives DC servo motor.
It is flow signal that this simulation people lung autonomous respiration telecontrol equipment gathers simulated lung chamber scavenge port by flow sensor; The flow signal that gathers is transferred to control circuit carries out analyzing and processing generation motor drive signal, DC servo motor driver motor drives signal to carry out rotating speed and turns to control DC servo motor, the control that DC servo motor turns to determines unwrapping wire and take-up action, the control of rotating speed then determines the speed of unwrapping wire or take-up, and then reaches the simulation of the simulated lung chamber being carried out respiratory air flow; Flow sensor carries out Real-Time Monitoring to the tidal volume of simulated respiration and then reaches control to the respiratory movement tidal volume.
Spring is in extended state makes its lung chamber infrabasal plate to suspended state that the power that up stretches be arranged; And pulling rope is to be wrapped on the DC servo motor rolling bearing, carries out take-up and unwrapping wire action by the rotating of motor, and take-up and unwrapping wire can produce the lung chamber infrabasal plate that is in suspended state downwards and move upward; Because lung chamber upper substrate is fixed, and infrabasal plate is subject to the traction generation motion of pulling rope, so the volume in simulated lung chamber is changed.If gas temperature is constant as can be known by the Ideal-Gas Equation PV=mRT, then the mRT of the Ideal-Gas Equation is a constant, therefore the intrapulmonic pressure in simulated lung chamber is changed.The variation of intrapulmonic pressure and ambient pressure mineralization pressure are poor, by the Hagen-Poiseuille equation
Figure BDA00003568215000021
Pressure differential can form the variation of air-flow as can be known.And flow sensor can detect gas through the flow of tracheae, and then controls the rotating of motor by control circuit.Device can be simulated lung chamber motion and the stream condition of people's lung under different breathing states well, in scientific research, teaching and the check of breathing Related product fabulous using value is arranged.
Further, also comprise simulated lung top layer panel and liquid crystal display touch screen, describedly be placed on simulated lung chamber upper substrate, and offer the hole of passing for simulated lung chamber scavenge port, described liquid crystal display touch screen is installed on the simulated lung top layer panel, and liquid crystal display touch screen is connected with control circuit.
Liquid crystal display touch screen is as display device and signal input apparatus, and wherein liquid crystal display touch screen adopts TFT Color Liquid Crystal Display touch-screen.
Further, the cavity in described simulated lung chamber is the flexible silicon glue chamer body, and the elastic modulus of flexible silica gel is little, and pliability is good, can simulate and serve as the lung chamber.
Further, described control circuit comprises and carries AD microcontroller, data transmission serial ports, SD data memory interface, dc power supply system and 3.3V reserve battery, the universal input output terminal of the exchanges data termination control circuit of TFT Color Liquid Crystal Display touch-screen, the DC servo motor driver is connected to the conventional data input/output terminal of control circuit.
Another purpose of the present invention is the control method that proposes a kind of people's of simulation lung autonomous respiration campaign, adopts the rope traction technique to carry out precise quantification and realizes inspiratory/expiratory (R I/E), respiratory rate (f Res/ min), tidal volume (VT), vital capacity (VC) physiology of respiration parameter.
To achieve these goals, its technical scheme is:
A kind of control method of simulating people's lung autonomous respiration campaign comprises:
Flow sensor detects by the airshed of simulated lung chamber scavenge port and is transferred to the microcontroller of control circuit, and sets the physiology of respiration parameter; Microcontroller carries out analyzing and processing according to the airshed that detects and the physiology of respiration parameter of setting, and produces motor drive signal, the work of control DC servo motor, thereby the extensional motion of control pulling rope, the respiratory movement in last control simulation lung chamber;
Described for the microprocessor controls motor adopts PID control, its control is exported by Discrete PI D formula:
u ( n ) = K p e ( n ) + K i Σ j n = 0 e ( j ) + K d Δe ( n )
Wherein: u (n) is n moment point Electric Machine Control voltage; K p, K i, K dBe respectively scale-up factor, integral coefficient and the differential coefficient of PID control; E (n) is the flow deviation value e (n)=Q of n moment point 0(n)-and Q (n), Q (n) refers to the n real-time flow data constantly that flow sensor detects, Q 0(n)=A I* Q Itar(n)+A E* Q Etar(n), Q Itar(n) and Q Etar(n) be respectively the air-breathing and expiratory flow value of target, coefficient A when air-breathing I=1; A E=0, coefficient A when exhaling I=0; A E=1;
Figure BDA00003568215000032
To be carved into n deviation accumulated value constantly from 0 o'clock; △ e (n) is deviation variation rate △ e (n)=e (n)-e (n-1).
Further, the physiological parameter of setting is inspiratory/expiratory R I/E, respiratory rate f Res/ min, tidal volume VT and vital capacity VC.
Further, sequence length N is by inspiratory/expiratory R the time cycle I/EWith respiratory rate f ResThe sample frequency f of/min and microcontroller DaqDetermine; Its pass is: inspiratory duration
Figure BDA00003568215000033
Expiratory duration T E = 60 f res ( E I + E ) = 60 f res ( 1 R I / E + 1 ) ; The inspiratory duration sequence length N I = f daq T I , The expiratory duration sequence length
Figure BDA00003568215000036
Time cycle sequence length N=N I+ N E
Relation between tidal volume VT and the air-breathing target flow satisfies:
Figure BDA00003568215000037
Relation between tidal volume VT and the expiration target flow satisfies:
Figure BDA00003568215000038
Air-breathing target real-time traffic governing equation is:
Figure BDA00003568215000039
N=[0 wherein, 1,2 ... N I], A ItarBe the target inspiration amplitude;
Expiration target real-time traffic is controlled to be: N=[N wherein I+ 1, N I+ 2 ... N], A EtarBe target expiration amplitude.
Compared with prior art, beneficial effect of the present invention is:
The device of simulation people lung of the present invention autonomous respiration can be fixed on by DC servo motor control the motion of pulling rope on the infrabasal plate of simulated lung chamber, to reach the respirometric purpose in simulated lung chamber; The accurate control of the take-up of pulling rope and unwrapping wire reaches high simulation people lung respiratory movement;
Control method of the present invention is inputted inspiratory/expiratory R according to required respiratory characteristic from the external world I/E, respiratory rate f ResThe physiology of respiration parameters such as/min, tidal volume VT, vital capacity VC are used the rope traction to carry out precise quantification and are realized inspiratory/expiratory (R I/E), respiratory rate (f Res/ min), tidal volume (VT), vital capacity (VC) physiology of respiration parameter.Thereby for the check of physiology of respiration scientific experiment research, physiology of respiration teaching and breathing Related product provides simulation people lung autonomous respiration motion platform.Physiological parameter is passed through TFT Color Liquid Crystal Display touch-screen as the data interaction interface; Select and carry the complexity that the AD microcontroller can reduce external AD circuit design.
Description of drawings
Fig. 1 is simulation people lung autonomous respiration telecontrol equipment structured flowchart.
Fig. 2 is simulation people lung autonomous respiration telecontrol equipment electrical structure schematic diagram.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing, but embodiments of the present invention are not limited to this.
The concrete control mode of simulation people lung respiratory movement is among the present invention: the air flow rate signal that gathers simulated lung chamber scavenge port by flow sensor; The flow signal that collects is sent to carries the AD microcontroller and carry out analyzing and processing and produce motor drive signal, according to the rotating of motor drive signal control motor and the speed of rotating speed, and then further control the extensional motion of pulling rope, the respiratory movement in last control simulation lung chamber;
The above-mentioned AD microcontroller input setting inspiratory/expiratory (R artificial according to human-computer interaction interface TFT Color Liquid Crystal Display touch-screen that carry I/E), respiratory rate (f Res/ min), the physiology of respiration parameters such as tidal volume (VT), vital capacity (VC), flow sensor detects the airshed by simulated lung chamber scavenge port, and microcontroller triggers motor control signal according to the respiration parameter of setting and the flow signal that detects;
Described microprocessor controls motor speed adopts the classical PID control principle, and its control output can be by the accessible Discrete PI D formula of following microprocessor: u ( n ) = K p e ( n ) + K i Σ j = 0 n e ( j ) + K d Δe ( n )
Wherein: u (n) is n moment point Electric Machine Control voltage; K p, K i, K dBe respectively scale-up factor, integral coefficient and the differential coefficient of PID control; E (n) is the flow deviation value e (n)=Q of n moment point 0(n)-and Q (n), Q (n) refers to the n real-time flow data constantly that flow sensor detects, Q here 0(n)=A I* Q Itar(n)+A E* Q Etar(n), Q Itar(n) and Q Etar(n) be respectively the air-breathing and expiratory flow value of target, coefficient A when air-breathing I=1; A E=0, coefficient A when exhaling I=0; A E=1; To be carved into n deviation accumulated value constantly from 0 o'clock; △ e (n) is deviation variation rate △ e (n)=e (n)-e (n-1).
Time cycle sequence length N can be by inspiratory/expiratory (R I/E) and respiratory rate (f Res/ min) and carry the sample frequency f of AD microprocessor DaqDetermine.Its pass is: inspiratory duration
Figure BDA00003568215000053
Figure BDA00003568215000054
Expiratory duration T E = 60 f res ( E I + E ) = 60 f res ( 1 R I / E + 1 ) ; The inspiratory duration sequence length N I = f daq T I , The expiratory duration sequence length
Figure BDA00003568215000057
Time cycle sequence length N=N I+ N E
Relation between tidal volume VT and the air-breathing target flow satisfies:
Figure BDA00003568215000058
Relation between tidal volume VT and the expiration target flow satisfies:
Figure BDA00003568215000059
Air-breathing target real-time traffic governing equation is:
Figure BDA000035682150000510
N=[0 wherein, 1,2 ... N I], A ItarBe the target inspiration amplitude;
Expiration target real-time traffic governing equation is:
Figure BDA000035682150000511
N=[N wherein I+ 1, N I+ 2 ... N], A EtarBe target expiration amplitude.
Use the concrete device of the above-mentioned respiratory movement control method of the present invention to see the people of simulation shown in the accompanying drawing 1 lung autonomous respiration motion structure installation drawing, comprise simulated lung top layer panel 1, flow sensor 2, simulated lung chamber upper substrate 3, spring 4, DC servo motor driver 5, pulley 6, pulling rope 7, simulated lung chamber scavenge port 8, TFT Color Liquid Crystal Display touch-screen 9, control circuit 10, fixedly pilum 11, simulated lung chamber infrabasal plate 12, DC servo motor 13, serving bearing 14, simulated lung bottom substrate 15, simulated lung chamber 16 in this structure drawing of device.
Fixedly pilum 11 is arranged on the simulated lung chamber bottom substrate 15, simulated lung chamber upper substrate 3 is placed on fixedly on the pilum 11, described simulated lung chamber 16 is placed between simulated lung chamber bottom substrate 15 and the simulated lung chamber upper substrate 3, simulated lung chamber 16 is provided with simulated lung chamber scavenge port 8, described flow sensor 2 is installed on the simulated lung chamber scavenge port 8, the output terminal connection control circuit 10 of flow sensor 2, control circuit 10 connects DC servo motor driver 5; Described spring 4 is installed between simulated lung chamber upper substrate 3 and the simulated lung chamber infrabasal plate 12 and is in extended state; Pulling rope 7 one ends are fixed on the simulated lung chamber infrabasal plate 12, and the other end is wrapped on the serving bearing 14 of DC servo motor 13 by pulley 6; DC servo motor driver 5 drives DC servo motor 13.
The simulated lung cavity adopts the flexible silicon glue material, and this elasticity modulus of materials is little, and pliability is good, can simulate and serve as the lung chamber.Wanting to simulate well people's lung respiratory movement is in the spring 4 of extended state and is fixed in lung chamber infrabasal plate 12 and finishes through the pulling rope 7 that DC servo motor 13 stretches by being fixed in lung chamber upper substrate 3.Spring 4 has the power that up stretches owing to being in its lung chamber infrabasal plate 12 to suspended state of extended state; And pulling rope 7 is to be wrapped in DC servo motor 13 to rotate on the serving bearing 14, carries out take-up and unwrapping wire action by the rotating of DC servo motor 13, and take-up and unwrapping wire can produce the lung chamber infrabasal plate 12 that is in suspended state downwards and move upward; Because lung chamber upper substrate 3 is fixing, and lung chamber infrabasal plate 12 is subject to the traction generation motion of pulling rope 7, so the volume in simulated lung chamber 16 is changed.If gas temperature is constant as can be known by the Ideal-Gas Equation PV=mRT, then the mRT of the Ideal-Gas Equation is a constant, therefore the intrapulmonic pressure in simulated lung chamber 16 is changed.The variation of intrapulmonic pressure and ambient pressure mineralization pressure are poor, by the Hagen-Poiseuille equation
Figure BDA00003568215000061
Pressure differential can form the variation of air-flow as can be known.And flow sensor energy 2 detects gas through the flow of tracheae, and then controls the rotating of DC servo motor 13 by control circuit 10.Device can be simulated lung chamber motion and the stream condition of people's lung under different breathing states well, in scientific research, teaching and the check of breathing Related product fabulous using value is arranged.
Based on the electric control structure schematic diagram that proposes under the apparatus structure framework of initiatively simulating people's lung respiratory movement as shown in Figure 2.Its electric control structure schematic diagram comprises that carrying AD microcontroller 25, flow sensor 2, DC servo motor driver 5, DC servo motor 13, serial data transmission 23, SD card data storage 26, TFT Color Liquid Crystal Display touch-screen 9, dc power supply system 20 and 3.3V reserve battery 22 modules forms.The universal input output terminal of the microcontroller 25 on the exchanges data termination control circuit 10 of its TFT Color Liquid Crystal Display touch-screen 9, DC servo motor driver 5 is connected to the conventional data input/output terminal of microcontroller 25.
Inspiratory/expiratory (R is set in the input that among the present invention by human-computer interaction interface TFT Color Liquid Crystal Display touch-screen 9 people is I/E), respiratory rate (f Res/ min), the physiology of respiration parameter such as tidal volume (VT), vital capacity (VC), the airshed that flow sensor 2 detects by simulated lung chamber scavenge port 8, microcontroller 25 triggers microcontroller 25 control signals according to the respiration parameter of setting and the flow signal that detects, and then the take-up of microcontroller 25 control pulling ropes 7 and unwrapping wire action, the respiratory movement in last control simulation lung chamber 16.This simulation people lung respiratory movement device meets people's pulmonary respiration physiology more, has high using value in occasions such as scientific experiment research, physiology of respiration teaching, the checks of breathing Related product.
Above-described embodiments of the present invention do not consist of the restriction to protection domain of the present invention.Any modification of within spiritual principles of the present invention, having done, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.

Claims (7)

1. simulate people's lung autonomous respiration telecontrol equipment for one kind, it is characterized in that flow sensor, simulated lung chamber upper substrate, spring, DC servo motor driver, pulley, pulling rope, simulated lung chamber scavenge port, control circuit, fixedly pilum, simulated lung chamber infrabasal plate, DC servo motor, serving bearing, simulated lung bottom substrate and simulated lung chamber;
Described fixedly pilum is arranged on the bottom substrate of simulated lung chamber, simulated lung chamber upper substrate is placed on fixedly on the pilum, described simulated lung chamber is placed between simulated lung chamber bottom substrate and the simulated lung chamber upper substrate, the simulated lung chamber is provided with simulated lung chamber scavenge port, described flow sensor is installed on the scavenge port of simulated lung chamber, the output terminal connection control circuit of flow sensor, control circuit connects the DC servo motor driver; Described spring fitting is between simulated lung chamber upper substrate and simulated lung chamber infrabasal plate and be in extended state; Pulling rope one end is fixed on the infrabasal plate of simulated lung chamber, and the other end is wrapped on the serving bearing of DC servo motor by pulley; DC servo motor driver drives DC servo motor.
2. simulation people lung autonomous respiration telecontrol equipment according to claim 1, it is characterized in that, also comprise simulated lung top layer panel and liquid crystal display touch screen, the described simulated lung chamber upper substrate that is placed on, and offer the hole of passing for simulated lung chamber scavenge port, described liquid crystal display touch screen is installed on the simulated lung top layer panel, and liquid crystal display touch screen is connected with control circuit.
3. simulation people lung autonomous respiration telecontrol equipment according to claim 1 and 2 is characterized in that, the cavity in described simulated lung chamber is the flexible silicon glue chamer body.
4. simulation people lung autonomous respiration telecontrol equipment according to claim 3 is characterized in that, described control circuit comprises and carries the AD microcontroller.
5. a control method of simulating people's lung autonomous respiration campaign is characterized in that, comprising:
Flow sensor detects by the airshed of simulated lung chamber scavenge port and is transferred to the microcontroller of control circuit, and sets the physiology of respiration parameter; Microcontroller carries out analyzing and processing according to the airshed that detects and the physiology of respiration parameter of setting, and produces motor drive signal, the work of control DC servo motor, thereby the extensional motion of control pulling rope, the respiratory movement in last control simulation lung chamber;
Described for the microprocessor controls motor adopts PID control, its control is exported by Discrete PI D formula:
u ( n ) = K p e ( n ) + K i Σ j = 0 n e ( j ) + K d Δe ( n )
Wherein: u (n) is n moment point Electric Machine Control voltage; K p, K i, K dBe respectively scale-up factor, integral coefficient and the differential coefficient of PID control; E (n) is the flow deviation value e (n)=Q of n moment point 0(n)-and Q (n), Q (n) refers to the n real-time flow data constantly that flow sensor detects, Q 0(n)=A I* Q Itar(n)+A E* Q Etar(n), Q Itar(n) and Q Etar(n) be respectively the air-breathing and expiratory flow value of target, coefficient A when air-breathing I=1; A E=0, coefficient A when exhaling I=0; A E=1;
Figure FDA00003568214900021
To be carved into n deviation accumulated value constantly from 0 o'clock; Δ e (n) is deviation variation rate Δ e (n)=e (n)-e (n-1).
6. the control method of simulation people lung autonomous respiration campaign according to claim 5 is characterized in that, the physiological parameter of setting is inspiratory/expiratory R I/E, respiratory rate f Res/ min, tidal volume VT and vital capacity VC.
7. the control method of simulation people lung autonomous respiration campaign according to claim 6 is characterized in that, the time cycle, sequence length N was by inspiratory/expiratory R I/EWith respiratory rate f ResThe sample frequency f of/min and microcontroller DaqDetermine; Its pass is: inspiratory duration
Figure FDA00003568214900022
Expiratory duration T E = 60 f res ( E I + E ) = 60 f res ( 1 R I / E + 1 ) ; The inspiratory duration sequence length N I = f daq T I , The expiratory duration sequence length Time cycle sequence length N=N I+ N E
Relation between tidal volume VT and the air-breathing target flow satisfies:
Figure FDA00003568214900026
Relation between tidal volume VT and the expiration target flow satisfies:
Figure FDA00003568214900027
Air-breathing target real-time traffic governing equation is:
Figure FDA00003568214900028
N=[0 wherein, 1,2 ... N I], A ItarBe the target inspiration amplitude;
Expiration target real-time traffic is controlled to be:
Figure FDA00003568214900029
N=[N wherein I+ 1, N I+ 2 ... N], A EtarBe target expiration amplitude.
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CN104392650A (en) * 2014-11-17 2015-03-04 张俊杰 Respirator simulation lung device for emergency nursing
CN104464475A (en) * 2014-12-25 2015-03-25 苏州大学 Medical simulated respiratory system
CN105575240A (en) * 2016-03-02 2016-05-11 苏州大学 Device used for simulating human spinal column three-dimensional motion generated because of breathing
CN106571094A (en) * 2016-05-20 2017-04-19 王靖 Breathing machine model lung device for emergency care
CN106924851A (en) * 2015-12-29 2017-07-07 北京谊安医疗系统股份有限公司 Anesthesia machine capacity control method based on Fuzzy Adaptive PID Control
WO2018028281A1 (en) * 2016-08-11 2018-02-15 纳智源科技（唐山）有限责任公司 Physiological sign simulator, and detection system of health monitoring product
CN109172986A (en) * 2018-10-15 2019-01-11 福建中医药大学附属人民医院（福建省人民医院） A kind of auxiliary sounding device and bionical vocal technique
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CN113056777A (en) * 2018-09-05 2021-06-29 天津天堰科技股份有限公司 Breathing simulator, medical human body simulator and method for simulating breathing scene

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Publication number Priority date Publication date Assignee Title
CN104392650A (en) * 2014-11-17 2015-03-04 张俊杰 Respirator simulation lung device for emergency nursing
CN104464475A (en) * 2014-12-25 2015-03-25 苏州大学 Medical simulated respiratory system
CN106924851A (en) * 2015-12-29 2017-07-07 北京谊安医疗系统股份有限公司 Anesthesia machine capacity control method based on Fuzzy Adaptive PID Control
CN105575240A (en) * 2016-03-02 2016-05-11 苏州大学 Device used for simulating human spinal column three-dimensional motion generated because of breathing
CN106571094A (en) * 2016-05-20 2017-04-19 王靖 Breathing machine model lung device for emergency care
WO2018028281A1 (en) * 2016-08-11 2018-02-15 纳智源科技（唐山）有限责任公司 Physiological sign simulator, and detection system of health monitoring product
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CN113056777A (en) * 2018-09-05 2021-06-29 天津天堰科技股份有限公司 Breathing simulator, medical human body simulator and method for simulating breathing scene
CN109172986A (en) * 2018-10-15 2019-01-11 福建中医药大学附属人民医院（福建省人民医院） A kind of auxiliary sounding device and bionical vocal technique

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