Passive following type respirator testing device and system

Abstract

The utility model relates to the technical field of equipment testing, in particular to a passive following type respirator testing device and system.The device comprises a respiration simulation assembly provided with a passive following type respirator; the muscle simulation assembly is connected with the respiration simulation assembly and used for driving the respiration simulation assembly to move and simulating the expiration and inspiration exchange process of the human body based on the movement of the respiration simulation assembly; and the upper computer is communicated with the muscle simulation assembly and is used for inputting a test instruction to enable the muscle simulation assembly to move and outputting a test result of the passive following type respirator according to the test data of the passive following type respirator. Therefore, the problem that the test accuracy is low due to the fact that the simulated lung lacks a power source and the spontaneous respiration state of human muscles cannot be simulated in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of equipment testing, and in particular to a passive follow-up respirator testing device and system. Background Art

[0002] With the rapid development of the medical device industry and the continuous improvement of people's living standards, the application scope of medical ventilators is becoming increasingly extensive. They not only play a vital role in clinical emergency treatment, anesthesia, and postoperative supportive care, but have also made significant progress in improving sleep quality and assisting breathing in hypoxic environments. This type of ventilator detects the user's inhalation movement and delivers the appropriate amount of gas at the right time to help the user breathe easily and increase lung ventilation. When it detects that the user stops inhaling or begins to exhale, the air supply is immediately reduced or stopped. During the development process of the ventilator, the performance of the ventilator must be tested to avoid misalignment or malfunction during use.

[0003] In the related art, simulated lungs are often used in systems for measuring ventilator performance. Based on their working principles, structural forms and other characteristics, they are divided into passive simulated lungs and active simulated lungs. Passive simulated lungs have no power source and generally adopt a double-ply airbag structure. The elasticity of the plywood can be adjusted to simulate the compliance of the lungs, a ball valve is used to simulate airway resistance, and an adjustable screw can simulate air leakage in the pipeline. This type of simulated lung has a simple structure and low cost, but due to the lack of a power source, it can only simulate different tidal volumes by replacing airbags of different sizes. It cannot simulate the autonomous breathing state of human muscles, and cannot accurately debug parameters independently. Therefore, it cannot effectively and accurately test and evaluate the performance of the ventilator. Utility Model Content

[0004] The present application provides a passive follow-up respirator testing device and system to solve the problem in related technologies that the simulated lung lacks a power source and cannot simulate the autonomous breathing state of human muscles, resulting in low test accuracy.

[0005] A first embodiment of the present application provides a passive follow-up respirator testing device, comprising: a breathing simulation component provided with a passive follow-up respirator; a muscle simulation component connected to the breathing simulation component, used to drive the movement of the breathing simulation component, and simulate the exhalation and inhalation exchange process of the human body based on the movement of the breathing simulation component; a host computer communicating with the muscle simulation component, used to input test instructions to activate the muscle simulation component, and output test results of the passive follow-up respirator based on the test data of the passive follow-up respirator.

[0006] Optionally, the breathing simulation component includes a cylinder, a trachea and a head model, wherein one end of the trachea is connected to the cylinder, the other end of the trachea is connected to the head model, and a passive follow-up respirator is provided at the facial position of the head model.

[0007] Optionally, the cylinder includes: a fixed plate, a spring, a folding plate, a movable plate and a rope hole, wherein the spring is installed outside the central axis of the folding plate and is a preset distance away from the edge of the fixed plate. The rope hole pulls the movable plate up and down and drives the folding plate to stretch.

[0008] Optionally, the muscle simulation component includes a driver, a power source device, a rocker and a connecting device, wherein the power source device is connected to the rocker, one end of the connecting device is connected to the rocker, and the other end is connected to the cylinder.

[0009] Optionally, the power source device includes: a motor, a connecting rod, a crank and a disc, wherein one end of the crank is connected to the rocker, the other end of the crank is connected to the connecting rod, and the rocker is fixed on the disc.

[0010] Optionally, the motor drives the connecting rod to move in translation, drives the crank to move in rotation, and drives the disc to move in rotation.

[0011] Optionally, the connecting device includes: a coil slot, the coil slot is fixed on the rocker, and one end of the connecting device is wound in the coil slot.

[0012] Optionally, the driver is connected to the power source device via a first signal line.

[0013] Optionally, the host computer is connected to the muscle simulation component via a second signal line.

[0014] A second embodiment of the present application provides a passive follow-up respirator testing system, comprising: the passive follow-up respirator testing device of the above embodiment; and a passive follow-up respirator, wherein the passive follow-up respirator is connected to the passive follow-up respirator testing device.

[0015] Therefore, this application has the following beneficial effects:

[0016] The breathing simulation component of the embodiment of the present application is provided with a passive follow-up respirator to simulate real inhalation and exhalation movements, and the muscle simulation component is connected to the breathing simulation component, and can accurately control the movement of the breathing simulation component according to the instructions issued by the host computer to simulate different breathing patterns and parameters. Due to the use of the passive follow-up respirator and the muscle simulation component, the system can simulate the breathing behavior of the human body more realistically, improve the reliability and accuracy of the test results, and is simple to operate and low in cost, and can meet the needs of the medical field and the experimental field. Thus, the problem that the simulated lung in the related art lacks a power source and cannot simulate the autonomous breathing state of the human muscle, resulting in low test accuracy, is solved. The additional aspects and advantages of the present application will be partially given in the description below, and part will become apparent from the description below, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A block diagram of a passive follow-up respirator testing device provided according to an embodiment of the present application;

[0019] Figure 2 A detailed structural diagram of a passive follow-up respirator testing device provided according to one embodiment of the present application;

[0020] Figure 3 A connection diagram of a cylinder and an air pipe according to one embodiment of the present application;

[0021] Figure 4 A simplified diagram of the connection between a cylinder and a power source device according to one embodiment of the present application;

[0022] Figure 5 A longitudinal cross-sectional view of a folding plate provided according to one embodiment of the present application;

[0023] Figure 6 A data calculation flow chart provided according to one embodiment of the present application;

[0024] Figure 7 A schematic diagram of a crank-connecting rod mechanism according to one embodiment of the present application;

[0025] Figure 8 A curve showing the change in displacement of the folding plate over time when the inhalation and exhalation times are the same according to one embodiment of the present application;

[0026] Figure 9 A curve showing the displacement of the power source device over time when the inhalation and exhalation times are the same according to one embodiment of the present application;

[0027] Figure 10 A curve showing the change in displacement of the folding plate over time under different inhalation and exhalation times according to one embodiment of the present application;

[0028] Figure 11 A curve showing the displacement of the power source device over time under different inhalation and exhalation times according to one embodiment of the present application;

[0029] Figure 12 A curve showing the change in displacement of the power source device over time when the inhalation and exhalation times are the same according to another embodiment of the present application;

[0030] Figure 13 FIG. 1 is a block diagram of a passive follow-up respirator testing system according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] The following describes, with reference to the accompanying drawings, a passive-following respirator testing device and system according to an embodiment of the present application. In response to the aforementioned background technology, the present application provides a passive-following respirator testing device capable of simulating the breathing conditions of individuals of different ages, genders, and motion states, mimicking the spontaneous breathing of human muscles in vitro. This device not only mimics the spontaneous breathing of human muscles but also features adjustable parameters such as tidal volume, exhalation and inhalation duration, and exhalation and inhalation rates, effectively detecting performance characteristics such as pressure, flow rate, and delay time within the respirator.

[0033] Specifically, Figure 1 4 is a block diagram of a passive follow-up respirator testing device according to an embodiment of the present application.

[0034] like Figure 1 As shown, the passive follow-up respirator testing device 100 includes: a breathing simulation component 101, a muscle simulation component 102 and a host computer 103.

[0035] Among them, the breathing simulation component 101 is provided with a passive follow-up respirator, and the muscle simulation component 102 is connected to the breathing simulation component to drive the movement of the breathing simulation component 101, and simulate the exhalation and inhalation exchange process of the human body based on the movement of the breathing simulation component 101; the host computer 103 communicates with the muscle simulation component to input test instructions to enable the muscle simulation component 102, and output the test results of the passive follow-up respirator according to the test data of the passive follow-up respirator.

[0036] It is understandable that the breathing simulation component 101 of the embodiment of the present application is provided with a passive follow-up respirator, which can directly respond to the action of an actual respirator or other external forces and simulate the real breathing process; the muscle simulation component 102 is connected to the breathing simulation component 101, and drives the former to perform corresponding movements by simulating the working mode of the human respiratory muscle group, thereby accurately reproducing the natural exhalation-inhalation exchange process of the human body; the host computer 103 serves as the control center of the entire system, responsible for sending test instructions to the muscle simulation component 102, and receiving and processing data from the passive follow-up respirator, and finally outputting detailed test results. During the actual execution process, the host computer 103 and the muscle simulation component 102 are connected by the second signal line 2, which ensures an efficient information transmission and feedback mechanism.

[0037] In addition, the host computer 103 of the embodiment of the present application is an operating software for controlling the motor to perform reciprocating motion. The control operating software uses a function to construct an acceleration and deceleration curve so that in the acceleration and deceleration mode, the speed, acceleration, jerk, and displacement are all continuous, thereby making the system operation highly flexible, completely avoiding flexible impact, and being close to the flexible transition of human muscles in the exhalation and inhalation exchange process. The specific work is as follows: (1) Simulating respiratory waveforms such as square waves, trapezoidal waves, triangle waves, and sine waves. It can also use program delay to simulate human breath holding. It can also import a file of position points to set discrete points (using the time converted from the detection point of the human tidal volume measured by the flow meter and the displacement of the motor). Through a large number of discrete points, the respiratory waveform is approximately simulated, thereby achieving the simulation of different respiratory waveforms; (2) It can simulate normal regular breathing and abnormal breathing; (3) When the power element starts working, the host computer 103 can output the displacement, speed, acceleration, and other curves of the linear motor in real time for subsequent calculation of the delay time of the respirator. (4) The inhalation time and the exhalation time can be set to be the same or different.

[0038] In one embodiment of the present application, Figure 2 As shown, the muscle simulation component 102 includes a driver 3, a power source device 5, a rocker 6 and a connecting device 7, wherein the power source device 5 is connected to the rocker 6, one end of the connecting device 7 is connected to the rocker 6, and the other end is connected to the cylinder 8; the breathing simulation component 101 includes a cylinder 8, a trachea 9 and a head model 10, wherein the trachea 9 can simulate the human respiratory structure to transport gas to the head model 10, thereby realizing the circulation of gas during breathing, and one end of the trachea 9 is connected to the cylinder 8.

[0039] Further as Figure 3 As shown, one end of the air pipe 9 is mounted on a circular hole 91 (air inlet and outlet) in the middle of the fixing plate 81 on one side of the cylinder 8. The other end of the air pipe 9 passes through the back of the head model 10 and enters the lip portion of the head model 10. The back of the head model and the lip portion of the head model are both provided with circular holes of the same diameter as the air pipe.

[0040] It should be noted that the trachea 9 in the embodiment of the present application can be a circular tube or a corrugated tube similar to the human trachea. The inner diameter of the trachea 9 is no larger than the inner diameter of the human respiratory duct. A passive follow-up respirator is provided on the face of the head model 10. The passive follow-up respirator is worn on the head model 10, and the passive follow-up respirator mask is tightly attached to the head model 10 to ensure that there is no air leakage at the mask during operation of the device. The passive follow-up respirator is also provided with a pressure sensor and a serial output port for parameters such as fan speed, which can monitor and record relevant data in real time.

[0041] Furthermore, if Figure 4As shown, the power source device 5 can be a motor, including: a connecting rod 51, a crank 52 and a disc 53, wherein one end of the crank 52 is connected to the rocker 6, and the other end of the crank 52 is connected to the connecting rod 51, and the rocker 6 is fixed on the disc 53. The power source device 5 drives the connecting rod 51 to move in translation, drives the crank 52 to move in rotation, and drives the disc 53 to move in rotation.

[0042] During actual execution, driver 3 is connected to power source device 5 via first signal line 4. The first signal line connection can be a compiler line and a motor line. The compiler line transmits driver 3's instructions to power source device 5, while the motor line transmits the current received by driver 3 to power source device 5, ensuring proper power supply and normal operation of the linear motor. Host computer 103 transmits the programmed program to driver 3 via network cable 2. Driver 3 sends the instructions to motor 5. Upon receiving the command, motor 5 reciprocates, driving connecting rod 51, connected by a coupling, to reciprocate translationally, which in turn drives crank 52 to rotate, which in turn drives disk 53 to rotate, and thus drives rocker 6 to rotate.

[0043] Furthermore, if Figure 4 As shown, the cylinder 8 includes: a fixed plate 81, a spring 80, a folding plate 83, a movable plate 84 and a rope hole 85, wherein the spring 82 is installed on the outside of the central axis of the folding plate 83 and is close to the edge of the fixed plate 81 at a preset distance. The rope hole 85 pulls the movable plate 84 up and down and drives the folding plate 83 to stretch. The preset distance can be set to 10 mm or 9 mm, without specific limitation.

[0044] Specifically, if Figure 4 As shown, the bottom of the cylinder 8 is a fixed plate 81, and there is a threaded circular hole in the middle, which can be used to install a gas adapter to allow gas to enter and exit the cylinder 8. In the middle is a folding plate 83, and the number of folds and the folding thickness are determined according to actual conditions.

[0045] The connecting device 7 in this embodiment of the present application can be a steel wire rope 7 capable of pulling the folding wall of the cylinder. When the rocker 6 rotates clockwise, the connecting device 7, under the action of the pulling force, pulls the free-moving plate 84 upward through the rope hole 85, causing the folding plate 83 to stretch. Conversely, when the rocker 6 rotates counterclockwise, the folding plate 83 compresses. The spring 82 is installed outside the central axis of the folding plate 83 and is symmetrically mounted along its circumference, near the edge of the fixed plate 81, approximately 10 mm away from the edge of the fixed plate 81. This installation has the advantage of ensuring equal force on both sides and preventing the movable plate 84 from shifting in the plane. The function of the spring 82 is to provide assistance in the retraction of the folding plate when the rocker 6 rotates counterclockwise. The initial length of the spring 82 is less than the fully compressed length of the folding plate 83, and the maximum extension length of the spring 82 is greater than the fully extended length of the folding plate 83. The cylinder 8 is positioned as vertically as possible to prevent bending of the folding wall due to gravity.

[0046] It should be noted that if Figure 5 As shown, the folded shape of the upper end 811 and the lower end 812 of the folding plate 83 in the embodiment of the present application must be half and the folding direction must be the same, so that the volume of the cylinder 8 and the tidal volume of each breath can be accurately calculated.

[0047] Furthermore, if Figure 4 As shown, the connecting device 7 includes: a coil slot 73, the coil slot 73 is fixed on the rocker 6, and one end 71 of the connecting device 7 is wound in the coil slot. Winding the connecting device 7 in the coil slot 3 instead of directly winding it on the rocker 6 is to prevent the rocker from deforming due to changes in the tension on the rod during the movement of the rope, and the other end 72 is tied to the rope hole 85 on the moving plate 84 of the cylinder 8.

[0048] In the actual implementation process, in order to ensure that the movable plate 84 moves up and down, the embodiment of the present application can set a pulley or similar device just above the movable plate 84 (the position of this device must be fixed by parts). The connecting device 7 bypasses the pulley and is connected to the movable plate 84 and the rocker 6. The connecting device 7 can also be made of a rope made of other inelastic materials. One end of the rocker 6 is wrapped around the connecting device 7, and the other end is fixed on the disk 53 (such as Figure 4 The advantages of using connecting device 7 and rocker 6 to connect the disc in this embodiment of the present application include the ability to select power devices with varying effective strokes. Even if a device with a smaller effective stroke is selected, the speed can be increased by increasing the number of disc rotations. Unlike piston-type simulated lungs, which require the effective stroke of the linear motor to be greater than the effective length of the piston rod within the cylinder, the maximum pulling force of connecting device 7 must be greater than the combined force of the force pulling folding plate 83 and the maximum elastic force of spring 82.

[0049] When the passive follow-up respirator testing device of the embodiment of the present application drives the movable plate 84 to be pulled upward, the pressure inside the breathing mask decreases. After the pressure sensor detects the pressure reduction (inhalation action), the fan starts to run at high speed, increasing the air supply, thereby increasing the air volume in the lungs; when the device detects that the user stops inhaling or starts to exhale, the fan immediately stops running or runs at a low speed to reduce the air supply.

[0050] The following is a detailed description of the working principle of the passive follow-up respirator test device according to the embodiment of the application with reference to a specific example, as follows:

[0051] First, determine the tidal volume Q and breathing time of the breathing to be simulated, and calculate the maximum displacement y of the folding plate based on the known cylinder parameters. max , and calculate the displacement and round-trip time of the motor operation based on the corresponding relationship, and select the type of motor movement at the same time. Different types of motor movement will result in different respiratory waveform curves. The calculation process is as follows Figure 6 As shown. Next, the host computer 103 sets the motor motion parameters (selecting the type of simulated motion curve, setting the maximum displacement and inhalation / exhalation time in segments, and the relevant dimensions of the device, etc.), and selects the number of points to be output on each respirator (for subsequent measurement of the corresponding respiratory rate, etc.). The host computer 103 transmits the programmed program to the driver 3 via the network cable 2. The driver 3 sends the command to the motor 5. Upon receiving the command, the motor 5 begins to reciprocate, driving the disc 53 connected to the motor to rotate clockwise and counterclockwise. The power is transmitted to the rocker 6 through the disc 53, causing the rocker 6 and the disc 53 to rotate in the same direction. This causes the steel wire rope wrapped in the coil slot 73 of the rocker 6 to wind or detach, thereby driving the elastic wall of the cylinder 8 to stretch and contract. The gas in the cylinder 8 is inhaled and expelled through the trachea 9. This then causes the pressure inside the respirator mask on the head model 10 to change. When the respirator detects a decrease or increase in the pressure inside the respirator mask, a series of internal circuit operations drive the fan to high speed or stop.

[0052] If the tidal volume Q of the simulated breathing setting is required, the maximum distance the folding plate needs to move is: like Figure 5 As shown, let the distance of the cylindrical folding plate diameter (center line) be a, the thickness of the folding plate after compression be h, and the length of the folding plate after stretching be b.

[0053] When the wall of the cylinder 8 stretches upward, the pressure inside the breathing mask decreases. After the pressure sensor detects the pressure reduction (inhalation action), the fan starts to run at high speed, increasing the air supply, thereby increasing the air volume inside the simulated lung (cylinder) and providing more oxygen; when the wall of the cylinder 8 retracts, the pressure inside the breathing mask increases. After the pressure sensor detects the pressure increase (exhalation action), the fan immediately stops running or runs at a low speed to reduce the air supply.

[0054] By processing the data curve output from the ventilator's serial port, the response time and any faults in the ventilator's fan can be determined. By comparing this curve with the displacement or velocity curves output by the host computer 103, the ventilator's delay can be calculated. The data transmitted by the ventilator can include pressure, flow, temperature, humidity, fan speed, and more.

[0055] In addition, the embodiment of the present application can simulate breathing with a sinusoidal waveform, that is, the displacement curve of the folding plate is a sinusoidal curve. The curve input into the host computer 103 is calculated as follows:

[0056] Assume the displacement of the folded plate is:

[0057]

[0058] Among them, k and c are constants.

[0059] Motor displacement:

[0060]

[0061] Among them, r 摇杆 is the radius of the rocker (including the radius of the coil), r is the length of the crank, and l is the radius of the connecting rod, such as Figure 7 shown.

[0062] If the simulated tidal volume Q = 2260 ml, inspiration t = 2 s, expiration t = 2 s, a = 0.06 m, A = 0.1 m, k = 2, c = -4n-1, r 摇杆 =0.08m, r=0.1m, l=0.3m. Then the displacement curve of the folding plate and the displacement curve of the motor are as follows: Figure 8 and Figure 9 .

[0063] If the simulated tidal volume Q = 2260 ml, inspiration t = 2 s, expiration t = 3 s, a = 0.06 m, A = 0.1 m, k 吸气 =2,k 呼气 =3, c 吸气 =-n,c 呼气 =n-1.5, r 摇杆 =0.08m, r=0.1m, l=0.3m. Then the displacement curve of the folding plate and the displacement curve of the motor are as follows: Figure 10and Figure 11 .

[0064] In the above two examples, the rotation range of the disc in each breath does not exceed half a circle. If the rotation range exceeds half a circle, for example, the simulated tidal volume Q = 2260 ml, inspiration t = 2 s, expiration t = 2 s, a = 0.06 m, A = 0.1 m, k = 2, c = -4n-1, r 摇杆 =0.04m, r=0.1m, l=0.3m. Then the displacement curve of the folded plate ( Figure 8 )The displacement curve of the motor corresponding to Figure 12 In this case, when switching direction (speed direction changes), the initial acceleration is large, which will cause a large mechanical impact on the motor. To maintain a smooth system transition, a flexible acceleration and deceleration algorithm must be added to the host computer algorithm.

[0065] The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific details of the above embodiment. A displacement sensor, a pressure sensor, or a flow sensor may be added to the cylinder 8. The wire rope may be one or more. The number of springs 82 may be an even number.

[0066] According to the passive follow-up respirator test device proposed in the embodiment of the present application, the breathing simulation component is provided with a passive follow-up respirator to simulate real inhalation and exhalation movements, and the muscle simulation component is connected to the breathing simulation component. It can accurately control the movement of the breathing simulation component according to the instructions issued by the host computer to simulate different breathing patterns and parameters. Due to the use of the passive follow-up respirator and muscle simulation component, the system can more realistically simulate the human body's breathing behavior, improve the reliability and accuracy of the test results, and is simple to operate and low in cost, which can meet the needs of the medical and experimental fields. Thus, the problem of low test accuracy caused by the lack of a power source in the simulated lung in the related art and the inability to simulate the autonomous breathing state of the human muscles is solved.

[0067] Next, a passive follow-up respirator testing system according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0068] like Figure 13 As shown, the passive follow-up respirator testing device 200 includes: a passive follow-up respirator testing device 100 and a passive follow-up respirator 201 , wherein the passive follow-up respirator is connected to the passive follow-up respirator testing device.

[0069] It should be noted that some of the aforementioned explanations of the embodiment of the follow-on respirator testing device are also applicable to the follow-on respirator testing device system of this embodiment, and will not be repeated here.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A passive follow-up respirator test device, characterized in that: include: A breathing simulation component provided with a passive follow-up respirator; a muscle simulation component connected to the breathing simulation component, for driving the movement of the breathing simulation component and simulating the exhalation and inhalation exchange process of the human body based on the movement of the breathing simulation component; The host computer communicating with the muscle simulation component is used to input a test instruction to make the muscle simulation component move, and output a test result of the passive follow-up respirator according to the test data of the passive follow-up respirator.

2. The passive follow-up respirator testing device according to claim 1, characterized in that: The breathing simulation component includes a cylinder, a trachea and a head model, wherein one end of the trachea is connected to the cylinder, the other end of the trachea is connected to the head model, and a passive follow-up respirator is provided at the facial position of the head model.

3. The passive follow-up respirator testing device according to claim 2, characterized in that: The cylinder includes: a fixed plate, a spring, a folding plate, a movable plate and a rope threading hole, wherein the spring is installed outside the central axis of the folding plate and is close to the edge of the fixed plate at a preset distance. The rope threading hole pulls the movable plate up and down and drives the folding plate to stretch.

4. The passive follow-up respirator testing device according to claim 1, characterized in that: The muscle simulation component includes a driver, a power source device, a rocker and a connecting device, wherein the power source device is connected to the rocker, one end of the connecting device is connected to the rocker, and the other end is connected to the cylinder.

5. The passive follow-up respirator testing device according to claim 4, characterized in that: The power source device includes: a motor, a connecting rod, a crank and a disc, wherein one end of the crank is connected to the rocker, the other end of the crank is connected to the connecting rod, and the rocker is fixed on the disc.

6. The passive follow-up respirator testing device according to claim 5, characterized in that: The motor drives the connecting rod to move in translation, drives the crank to move in rotation, and drives the disc to move in rotation.

7. The passive follow-up respirator testing device according to claim 4, characterized in that: The connecting device includes: A coil slot is fixed on the rocker, and one end of the connecting device is wound in the coil slot.

8. The passive follow-up respirator testing device according to claim 4, characterized in that: The driver is connected to the power source device via a first signal line.

9. The passive follow-up respirator testing device according to claim 1, characterized in that: The host computer is connected to the muscle simulation component via a second signal line.

10. A passive follow-up respirator test system, characterized in that: include: The passive follow-up respirator testing device according to any one of claims 1 to 9; A passive follow-on respirator, wherein the passive follow-on respirator is connected to the passive follow-on respirator testing device.

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