Device and method for testing multi-stage decompression peak value of pressurized oxygen supply mask

Abstract

The invention discloses a multi-stage decompression peak testing device and method for a pressurized oxygen supply mask, and relates to the field of testing. The method for testing the multi-stage pressure reduction peak value of the pressurized oxygen supply mask comprises the following steps of: wearing the pressurized oxygen supply mask to be tested and a protective helmet on a dummy head model in an airtight manner; placing the dummy head model in a test cabin of a multi-pole explosion decompression simulation device, and connecting a pressurization oxygen supply mask with the artificial simulation lung; the pressure in the test cabin is adjusted to the initial cabin pressure, the multi-pole explosion pressure reduction simulation device is controlled to sequentially perform at least two times of explosion pressure reduction, and the pressure in the test cabin is adjusted to the simulated high-altitude pressure after being sequentially reduced twice from the initial cabin pressure; and collecting pressure change in the pressurized oxygen supply mask and calculating a pressure reduction peak value. The multi-stage pressure reduction peak value testing device and method for the pressurized oxygen supply mask can detect the pressure reduction peak value in the pressurized oxygen supply mask of a pilot at different pressure reduction heights, and therefore whether the protection function of pilot life support equipment meets the requirement or not is verified.

Description

Technical Field

[0001] The present application relates to the field of testing, and in particular to a device and method for testing the peak value of a pressurized oxygen supply mask with multiple decompression stages. Background Art

[0002] Rapid decompression in the aircraft cabin has a great impact on the human body. When the pressurized cabin is damaged or a mechanical failure occurs and decompression is carried out, the cabin pressure suddenly drops to balance with the outside world. The expanded gas in the lungs and the dead space of the trachea and mask cannot be discharged quickly, and the pressure in the lungs increases instantly. The highest value is called the "peak decompression of the lungs". The severe expansion of the gas in the lungs exceeds the physiological tolerance of the pilot's lungs to the peak decompression, which can easily cause barotrauma and endanger life in severe cases.

[0003] The pressurized oxygen mask with protective helmet and protective clothing is mainly used to ensure that the pilot can complete a long flight mission in the airtight cockpit of the aircraft, and to ensure that the pilot can still safely operate the aircraft or perform emergency ejection after the sudden rapid cabin decompression caused by a malfunction in the airtight cockpit of the aircraft during high-altitude flight. Therefore, the test of the decompression peak of the pressurized oxygen mask at the moment of decompression is one of the key test requirements for life support.

[0004] Based on the requirements of aviation physiology, when the maximum residual pressure during normal flight exceeds the protective performance indicators provided by the existing life support equipment to the pilot, it will cause an extremely high risk factor for the pilot's life support. In order to prevent the pilot from experiencing explosive hypoxia and lung damage when the cabin is rapidly depressurized, necessary protective measures need to be taken, such as using two decompressions to reduce the peak pressure relief inside the mask. Therefore, it is necessary to test the decompression peak of the pressurized oxygen mask during two decompressions to determine whether it meets the protection requirements. Summary of the invention

[0005] The purpose of the present application is to provide a pressurized oxygen mask multi-stage decompression peak test device and method, which can test the decompression peak in the pressurized oxygen mask of the pilot at different decompression altitudes, so as to verify whether the protection function of the pilot's life support equipment meets the requirements.

[0006] This application is implemented as follows:

[0007] The present application provides a method for testing a multi-stage decompression peak value of a pressurized oxygen mask, which comprises the following steps:

[0008] Put the pressurized oxygen mask and protective helmet to be tested on the dummy head model in an airtight manner;

[0009] Place the dummy head model in the test chamber of the multi-polar explosion decompression simulation device, and connect the pressurized oxygen supply mask to the artificial simulated lung;

[0010] The pressure in the test cabin is adjusted to the initial cabin pressure, and the multi-polar explosion decompression simulation device is controlled to perform explosion decompression at least twice in sequence, so that the pressure in the test cabin is reduced from the initial cabin pressure twice in sequence and then adjusted to the simulated high-altitude pressure;

[0011] The pressure changes in the pressurized oxygen mask are collected and the decompression peak is calculated.

[0012] In some optional embodiments, when the pressurized oxygen mask and protective helmet to be tested are worn airtightly on a dummy head model, a cavity is formed at the mouth and nose of the dummy head model, and a pressure sensor is used to detect the pressure change in the cavity and calculate the decompression peak value.

[0013] In some optional embodiments, when a pressure sensor is used to detect changes in the pressure of the cavity, the pressurized oxygen supply mask is connected to a pressure test box in which the pressure sensor is provided through a hose.

[0014] In some optional embodiments, the artificial simulated lung is connected to the pressurized oxygen mask and the communicating cavity through a hose.

[0015] In some optional embodiments, a display screen electrically connected to the pressure sensor is also included.

[0016] The present application also provides a pressurized oxygen mask multi-stage decompression peak test device, which includes a multi-pole explosion decompression simulation device with a test cabin. The multi-pole explosion decompression simulation device is configured to perform at least two explosion decompressions to reduce the pressure in the test cabin from the initial cabin pressure twice and then adjust it to the simulated high-altitude pressure. It includes a dummy head model, an artificial simulated lung and a pressure sensor arranged in the test cabin. The dummy head model is equipped with a pressurized oxygen mask and a protective helmet. The artificial simulated lung is connected to the pressurized oxygen mask. The pressure sensor is used to detect the pressure in the pressurized oxygen mask.

[0017] The beneficial effects of the present application are as follows: the pressurized oxygen mask multi-stage decompression peak test method provided by the present application comprises the following steps: wearing the pressurized oxygen mask and protective helmet to be tested airtightly on a dummy head model; placing the dummy head model in the test cabin of the multi-pole explosion decompression simulation device, and connecting the pressurized oxygen mask to the artificial simulated lung; adjusting the pressure in the test cabin to the initial cabin pressure, controlling the multi-pole explosion decompression simulation device to perform at least two explosion decompressions in sequence, so that the pressure in the test cabin is reduced from the initial cabin pressure twice in sequence and then adjusted to the simulated high-altitude pressure; collecting the pressure change in the pressurized oxygen mask and calculating the decompression peak. The pressurized oxygen mask multi-stage decompression peak test device and method provided by the present application can test the decompression peak in the pressurized oxygen mask of the pilot at different decompression altitudes, thereby verifying whether the protection function of the pilot's life support equipment meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of a pressurized oxygen mask multi-stage decompression peak test device provided in an embodiment of the present application.

[0020] In the figure: 100, multi-pole explosion decompression simulation device; 110, test chamber; 120, negative pressure tank; 130, vacuum system; 200, dummy head model; 210, pressurized oxygen supply mask; 220, artificial simulated lung; 230, pressure test box; 240, pressure sensor; 250, display screen. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The features and performance of the pressurized oxygen mask multi-stage decompression peak test device and method of the present application are further described in detail below in conjunction with the embodiments.

[0029] like Figure 1As shown, the embodiment of the present application provides a pressurized oxygen mask multi-stage decompression peak test device, which includes a multi-pole explosion decompression simulation device 100 having a test cabin 110, a negative pressure tank 120 and a vacuum system 130, the test cabin 110 and the negative pressure tank 120 are respectively connected to the vacuum system 130, the test cabin 110 and the negative pressure tank 120 are connected through two decompression mechanisms, and the multi-pole explosion decompression simulation device is configured to perform two explosion decompressions to reduce the pressure in the test cabin 110 from the initial cabin pressure twice and then adjust to Simulate high altitude pressure; a dummy head model 200 and an artificial simulated lung 220 are arranged in the test chamber 110, the dummy head model 200 wears a pressurized oxygen supply mask 210 and a protective helmet, the artificial simulated lung 220 is connected to the pressurized oxygen supply mask 210 through a hose, the pressurized oxygen supply mask 210 is connected to the pressure test box 230 through a hose, and a pressure sensor 240 is arranged in the pressure test box 230, the pressure sensor 240 is used to detect the pressure in the pressurized oxygen supply mask 210, and the pressure sensor 240 is electrically connected to a display screen 250. The multi-polar explosion decompression simulation device 100 used in this embodiment is a prior art.

[0030] The embodiment of the present application also provides a pressurized oxygen mask multi-stage decompression peak test method, which is performed using the above-mentioned pressurized oxygen mask multi-stage decompression peak test device, and includes the following steps:

[0031] Step 1: Wear the pressurized oxygen mask 210 and the protective helmet to be tested on the dummy head mold 200 in an airtight manner, so that a cavity is formed at the mouth and nose of the dummy head mold 200;

[0032] Step 2: Place the dummy head model 200 and the artificial simulated lung 220 in the test chamber 110 of the multi-polar explosion decompression simulation device 100, connect the pressurized oxygen supply mask 210 and the artificial simulated lung 220 through a hose, and connect the pressurized oxygen supply mask 210 to the pressure test box 230 with a pressure sensor 240 through a hose;

[0033] Step 3: Use the vacuum system 130 to adjust the pressure in the test cabin 110 and the negative pressure tank 120 to the initial cabin pressure and the preset pressure respectively, and control the decompression mechanism of the multi-pole explosion decompression simulation device 100 to perform explosion decompression twice in sequence, so that the pressure in the test cabin 110 is reduced twice from the initial cabin pressure and then adjusted to the simulated high-altitude pressure;

[0034] Step 4: Use the pressure sensor 240 to collect the pressure changes in the pressurized oxygen mask 210 and calculate the decompression peak value.

[0035] The pressurized oxygen mask multi-stage decompression peak test method and device provided in the embodiment of the present application are performed by wearing the pressurized oxygen mask 210 to be tested and the matching protective helmet together on the dummy head model 200 in an airtight manner, and then placing the dummy head model 200 and the artificial simulated lung 220 in the test chamber 110 of the multi-pole explosion decompression simulation device 100, connecting the pressurized oxygen mask 210 and the artificial simulated lung 220, and connecting the pressurized oxygen mask 210 to the pressure test box 230 where the pressure sensor 240 is placed, controlling the decompression mechanism of the multi-pole explosion decompression simulation device 100 to perform two explosion decompressions in sequence, so that the pressure in the test chamber 110 is reduced from the initial cabin pressure twice in sequence and then adjusted to the simulated high-altitude pressure, and using the pressure sensor 240 to collect the pressure changes in the pressurized oxygen mask 210 and calculate the decompression peak.

[0036] The pressurized oxygen mask multi-stage decompression peak test method and device provided in the embodiment of the present application can test the decompression peak in the pressurized oxygen mask of the pilot at different decompression altitudes, thereby verifying whether the protection function of the pilot's life support equipment meets the requirements.

[0037] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A method for testing the multi-stage decompression peak value of a pressurized oxygen mask, characterized in that: It includes the following steps: Put the pressurized oxygen mask and protective helmet to be tested on the dummy head model in an airtight manner; Placing the dummy head model in a test chamber of a multi-polar explosion decompression simulation device, and connecting the pressurized oxygen supply mask to an artificial simulated lung; The pressure in the test cabin is adjusted to the initial cabin pressure, and the multi-pole explosion decompression simulation device is controlled to perform explosion decompression at least twice in sequence, so that the pressure in the test cabin is reduced from the initial cabin pressure twice in sequence and then adjusted to the simulated high-altitude pressure; The pressure change in the pressurized oxygen mask is collected and the decompression peak is calculated.

2. The multi-stage decompression peak test method for a pressurized oxygen mask according to claim 1, characterized in that: When the pressurized oxygen mask and protective helmet to be tested are worn airtightly on the dummy head model, a cavity is formed at the mouth and nose of the dummy head model, and a pressure sensor is used to detect the pressure change of the cavity and calculate the decompression peak value.

3. The multi-stage decompression peak test method for a pressurized oxygen mask according to claim 2, characterized in that: When the pressure sensor is used to detect the pressure change of the cavity, the pressurized oxygen supply mask is connected to a pressure test box in which the pressure sensor is arranged through a hose.

4. The multi-stage decompression peak test method for a pressurized oxygen mask according to claim 2, characterized in that: The artificial simulated lung is connected to the pressurized oxygen supply mask and communicated with the cavity through a hose.

5. The method for testing the multi-stage decompression peak value of a pressurized oxygen supply mask according to claim 1, characterized in that: Also included is a display screen electrically connected to the pressure sensor.

6. A pressurized oxygen mask multi-stage decompression peak test device, comprising a multi-pole explosion decompression simulation device with a test cabin, wherein the multi-pole explosion decompression simulation device is configured to perform at least two explosion decompressions to reduce the pressure in the test cabin from the initial cabin pressure twice and then adjust to the simulated high-altitude pressure, characterized in that: It includes a dummy head model, an artificial simulated lung and a pressure sensor arranged in the test cabin. The dummy head model wears a pressurized oxygen supply mask and a protective helmet. The artificial simulated lung is connected to the pressurized oxygen supply mask. The pressure sensor is used to detect the pressure in the pressurized oxygen supply mask.

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