Pulse type inflation control system and method and dummy detection method for airtight protective clothing

Abstract

The invention discloses a pulse type inflation control system and method and a dummy detection method of airtight protective clothing, and relates to the technical field of airtight protective clothing dummy detection, and the system comprises an air source, an inflation valve, an exhaust valve, an air pressure sensor and a controller. The method comprises the following steps: by simulating two working conditions of resting and working of a person wearing the airtight protective clothing and referring to the breathing rhythm of the person, inflating the interior of the airtight protective clothing; in the inflation process, the air pressure monitoring and inflation and deflation regulation and control technology is utilized, fluctuating air pressure is formed in the clothes, the internal working conditions of the clothes are simulated, and therefore the dummy-based airtight protective clothes overall detection conditions are achieved. According to the invention, the high-precision detection effect is achieved by realizing high-fidelity simulation of the clothing working condition, the method is compatible with the existing related clothing dummy detection standard, the function of the existing dummy detection system is perfectly improved, and the use scene and the utilization rate of the existing facility are conveniently expanded.

Description

Technical Field

[0001] The invention relates to the technical field of dummy detection of airtight protective clothing, in particular to a pulsating inflation control system and method and a dummy detection method for airtight protective clothing. Background Art

[0002] The whole-body inspection of airtight protective clothing is a common problem faced by the industry. Airtight protective clothing is mainly used to isolate gaseous chemical, biological, nuclear and other hazardous substances. It is the last line of defense for workers in dangerous environments. Its performance inspection is a basic measure to protect workers and improve work efficiency.

[0003] For the overall performance testing of clothing, the industry usually uses a dummy testing system to analyze the heat transfer between the human body, clothing and the external environment through temperature sensors placed on the dummy's body, and then determine the protective and comfort performance of the clothing. In order to standardize its testing process, a series of standards have been issued at home and abroad, including national standards "GB / T 23467-2009 Test method for evaluating the flame retardant performance of clothing under flashover conditions using dummies" and "GB / T 18398-2001 Test method for thermal resistance of clothing-warm body dummy method" and international standards "ASTM F1930-23 Standard test method for evaluating flame retardant clothing for fire simulation using instrumented human models" "ASTM F1291-2016 Standard test method for measuring thermal insulation performance of clothing using warm body dummy" "ISO11612:2015 Protective clothing-Clothing protection against heat and flame-Minimum performance requirements" "ISO 9920:2009 Estimation of thermal resistance and water vapor resistance of ergonomic clothing for thermal environments" and so on.

[0004] Although dummy detection systems are widely used in the field of clothing, they cannot be used to detect airtight protective clothing. Taking chemical protective clothing as an example, related tests are not included in the authoritative special standards at home and abroad, including the national standard "GB 24539-2021 Protective Clothing Chemical Protective Clothing", and foreign "ISO16602-2007 Chemical Protective Clothing Classification, Labeling and Performance Requirements", "EN14325-2018 Chemical Protective Clothing Chemical Protective Clothing Material Seam Connection and Assembly Test Method and Performance Classification", "NFPA1991 Hazardous Materials Emergency Events and CBRN Terrorism Incident Emergency Vapor Protective Clothing Standard" and so on.

[0005] The dummy detection system cannot be used for the detection of airtight protective clothing. The fundamental reason is that all dummy detection systems lack the function of inflating the clothing. In order to isolate the gaseous hazardous substances in the environment, the inside of the protective clothing is inflated to form a positive air pressure inside the clothing relative to the external environment. The protective gas layer formed by this air pressure will significantly affect the heat transfer process between the human body and the outside world, thereby changing the temperature index in the dummy detection system. Therefore, the existing dummy detection system will lead to large errors in the detection results when it is not inflated, that is, the detection performance of the clothing does not match the actual performance.

[0006] Pre-inflation of airtight protective clothing is a necessary step for dummy testing. Although existing products or patents have achieved inflation and control functions, they are mainly aimed at the use of clothing rather than the actual needs of the testing process, and their control technology usually follows the change of temperature. For example, various types of inflatable clothing for warmth, such as USll523644, an inflatable temperature-regulating clothing with strip airbags, CN118370417A, an inflatable cold-proof clothing and a finished product transfer device for processing, CN220458645U, an outdoor multifunctional cold-proof clothing, CN212994460U, an inflatable cold-proof clothing, CN212345450U, a wheelchair cold-proof clothing combination structure, CN2528245Y, an inflatable cold-proof clothing, CN2493048Y, an inflatable temperature-regulating clothing, CN2445605Y, an inflatable cold-proof and warm clothing, CN1061705A, an inflatable cold-proof clothing, etc. The reason why the above technology cannot be applied to airtight protective clothing is that the protective performance of airtight protective clothing is related to human breathing. During the dressing process, the pressure of the gas layer in the clothing fluctuates with breathing, causing the thickness of the gas layer to change dynamically, which in turn causes the thermal transfer index of the clothing to continue to change; therefore, the dynamically changing thickness of the gas layer becomes a key factor affecting the thermal transfer index of the clothing. None of the existing technologies or patents can inflate according to the breathing rhythm, and cannot achieve the gas layer fluctuation effect under the action of breathing, resulting in obvious errors in dummy detection. Summary of the invention

[0007] In order to overcome the above-mentioned defects in the prior art, the present invention provides a pulsating inflation control system to provide hardware support for dummy detection of airtight protective clothing.

[0008] To achieve the above object, the present invention adopts the following technical solutions, including:

[0009] A pulsating inflation control system, comprising: an air source, an inflation valve, an exhaust valve, an air pressure sensor and a controller;

[0010] The air source is used to inflate the interior of the garment;

[0011] The inflation valve connects the garment with the air source and is used to control the inflation of the garment;

[0012] The exhaust valve communicates the inside and outside of the garment and is used to control the exhaust of the garment to the outside;

[0013] The air pressure sensor is used to measure the air pressure inside the garment and send the air pressure value to the controller;

[0014] The controller is used to control the inflation valve and the exhaust valve according to the air pressure value.

[0015] Preferably, the gas source is a compressed gas cylinder; the controller is a single-chip microcomputer; the controller, the air pressure sensor and the inflation valve are integrated into one; the exhaust valve is arranged on the head or top of the clothing, sharing the reserved interface of the dummy head.

[0016] The present invention also provides a pulsating inflation control method, which can simulate the dressing condition and achieve the dummy-based airtight protective clothing assembly detection conditions.

[0017] A pulsating inflation control method comprises the following steps:

[0018] S1, preset parameters, including: dummy height, inflation frequency at rest, inflation volume per time at rest, inflation frequency during operation, inflation volume per time during operation, inflation times, reference pressure, and exhaust pressure; among them,

[0019] The inflation frequency at rest is the number of breaths per minute taken by the wearer at rest;

[0020] The inflation volume at rest is the tidal volume of each time when the wearer is at rest;

[0021] The inflation frequency during operation is the number of breaths per minute of the wearer in the working state;

[0022] The inflation volume for each operation is the tidal volume for each operation of the wearer;

[0023] S2, after the dummy is dressed, the air pressure inside the clothing is continuously measured using the air pressure sensor and the air pressure value is sent to the controller;

[0024] S3, pre-inflation: before the dummy test is started, the air source is used to inflate the interior of the garment, and the exhaust valve is closed during the inflation process until the air pressure inside the garment is not lower than the reference pressure, and the garment reaches a normal use state;

[0025] S4, pulsating inflation: simulates breathing at rest or during work, and performs pulsating inflation into the garment according to preset parameters. The controller controls the opening or closing of the inflation valve according to the inflation frequency and each inflation volume at rest / work;

[0026] S5, overpressure exhaust: when the air pressure inside the garment exceeds the exhaust pressure, the exhaust valve opens and the garment is exhausted to the outside; when the air pressure inside the garment is lower than the reference pressure, the exhaust valve closes.

[0027] Preferably, the inflation frequency at rest is 12-20 times / minute.

[0028] Preferably, the amount of air filled each time at rest = (body height - 105) x 4.25; wherein the unit of body height is centimeters, and the unit of air filled amount is milliliters.

[0029] Preferably, the inflation frequency during operation is 20-60 times / minute.

[0030] Preferably, the lower limit of each inflation amount during operation is the same as the inflation amount during rest; the upper limit of each inflation amount during operation = (height - 105) × 6; wherein the unit of height is centimeters, and the unit of inflation amount is milliliters.

[0031] Preferably, the reference pressure is 1.02 kPa, the exhaust pressure is 1.29 kPa, and the number of inflations is greater than or equal to 1.

[0032] The present invention also provides a dummy detection method for airtight protective clothing, which achieves a high-precision detection effect through highly realistic simulation of clothing working conditions.

[0033] The dummy detection method of airtight protective clothing utilizes the above-mentioned pulsating inflation control method to perform dummy detection on the airtight protective clothing, controls the dynamic balance of air pressure inside the clothing under resting or working conditions, realizes the simulation of dressing conditions, and is used to detect clothing performance.

[0034] Preferably, the specific process is as follows:

[0035] The first step is to put the dummy in the clothes to be tested;

[0036] The second step is to control the dynamic balance of air pressure inside the garment under resting or working conditions according to the pulsating inflation control method, so as to simulate the dressing conditions;

[0037] The third step is to conduct thermal resistance, moisture resistance or flame retardancy tests to test the performance of clothing in accordance with the procedures specified in relevant standards for resting or working conditions;

[0038] Step 4. After completing the dummy inspection, turn off the working power supply, controller, air source and valve, and remove the clothing and pulsating inflation control system.

[0039] The advantages of the present invention are:

[0040] (1) The present invention proposes a pulsating inflation control system, method and dummy detection method for airtight protective clothing. By simulating the two working conditions of a person wearing airtight protective clothing, namely, resting and working, and referring to the breathing rhythm of the person, the airtight protective clothing is inflated. During the inflation process, air pressure monitoring and inflation and deflation regulation technology are used to form a fluctuating gas pressure in the clothing, thereby simulating the working conditions inside the clothing, thereby achieving the airtight protective clothing assembly detection conditions based on the dummy.

[0041] (2) The present invention achieves high-precision detection effect by realizing highly realistic simulation of clothing working conditions, and is compatible with the current relevant clothing dummy detection standards. It is a perfect improvement on the functions of the existing dummy detection system, and is also convenient for expanding the use scenarios and utilization rate of existing facilities.

[0042] (3) The present invention is widely applicable to the field of protective equipment detection in hazardous environments such as chemistry, nuclear radiation, and biomedicine, and therefore has practical value in assisting scientific research and supporting industrial development.

[0043] (4) The present invention fills the gap that airtight protective clothing cannot implement dummy detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of a pulsating inflation control system of the present invention.

[0045] Figure 2 The present invention is a flow chart of a pulsating inflation control method. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Example 1

[0048] Depend on Figure 1 As shown, a pulsating inflation control system of the present invention includes: an air source, an inflation valve, an exhaust valve, an air pressure sensor and a controller.

[0049] The air source provides inflation function for the clothing, and the air supply pressure should be stable at 0.3MPa-0.5MPa. There are two types in form: one is a portable gas cylinder, which is wrapped in the clothing together with the dummy; the other is an external transmission pipeline, which shares an interactive passage with the dummy and external communication, water supply and other systems.

[0050] The inflation valve connects the garment with the air source; the inflation valve has two states, open and closed, and is used to control the inflation process of the air source into the garment.

[0051] The exhaust valve connects the inside and outside of the garment and is used to control the exhaust of the garment to the outside and maintain a positive pressure inside the garment relative to the outside of the garment. The inflation valve has two states: open and closed. When the pressure inside the garment is too high, the exhaust valve is opened and exhaust is exhausted to the outside. Otherwise, the exhaust valve is closed.

[0052] The air pressure sensor is used to measure the gas pressure inside the garment and send the measured air pressure value to the controller; the measured air pressure value will determine whether to inflate the garment or exhaust the air outside the garment to avoid insufficient or excessive air pressure inside the garment.

[0053] The controller acts on the inflation valve and the exhaust valve, and controls the opening or closing of the inflation valve and the exhaust valve respectively based on the air pressure value of the air pressure sensor and the preset program.

[0054] Regarding the gas supply, this system can choose two types of gas sources, one is a compressed gas cylinder (portable), and the other is a gas transmission pipeline (external transmission). The former can be designed with reference to the national standard "GB / T 24161-2009 Periodic Inspection and Evaluation of Composite Gas Cylinders for Respirators"; the latter shares the existing communication interface or suspension structure of the dummy detection system and can be realized by modifying the existing dummy detection system. Comparing the two types of gas sources, the former is more compatible with the existing dummy detection system. The gas source of this embodiment uses a compressed gas cylinder.

[0055] Regarding the software carrier of the control system, the system can be developed based on a single-chip microcomputer or a computer. In the former case, the software is loaded on the controller. In the latter case, the software is loaded on the computer. Compared with the two, the former has higher integration and is more conducive to integration. This embodiment uses a single-chip microcomputer as the software carrier and loads it on the controller.

[0056] Regarding the integration of the control system, combined with the above two analyses, in order to adapt to a wider range of application scenarios, this embodiment selects an integrated solution with a smaller volume, that is, the controller, air pressure sensor and inflation valve are integrated into one, and the control software is loaded on the controller. After the integrated solution is connected to the compressed gas cylinder, it is fixed to the back of the dummy with reference to the industry standard XF 124-2013, thereby simulating the actual application scenario of the protective clothing to a greater extent; at the same time, there is no need to modify the existing dummy detection system, so that it is compatible with the existing detection systems and standards to a greater extent. Since the gas pressure everywhere inside the clothing is considered to be consistent, placing only the air pressure sensor on the back of the dummy can meet the detection requirements.

[0057] Regarding the exhaust valve, combined with the main application scenario of this system, that is, airtight protective clothing, destructive operations on the clothing should be minimized during the use of the system. In various existing dummy detection systems, interfaces are generally reserved on the dummy's head for internal and external communications and suspension. Therefore, in this embodiment, the exhaust valve is installed on the head of the clothing and shares the reserved interface of the dummy's head; at the same time, the exhaust valve and the interface of the clothing should be sealed to maximize the airtightness of the dummy after wearing the clothing.

[0058] Regarding high temperature safety, the working environment of the dummy detection system has extreme temperature conditions. For example, the working temperature of the flashover dummy can be as high as nearly 1,000 degrees Celsius, while the working temperature of the warm-body dummy can be as low as -20 degrees Celsius. In order to ensure the working efficiency of this system, the materials used in this system should consider extreme temperature tolerance, and the components that cannot withstand extreme temperatures should be provided with necessary thermal protection.

[0059] Example 2

[0060] Depend on Figure 2 As shown, a pulsating inflation control method of the present invention comprises the following steps:

[0061] S1, preset parameters: 8 parameters are preset in the software (controller) of the control system, including: dummy height, inflation frequency at rest, inflation volume per time at rest, inflation frequency during operation, inflation volume per time during operation, number of inflations, reference pressure, and exhaust pressure.

[0062] Each preset value should take into account the actual situation of the dummy or the test needs, as follows:

[0063] The height of the dummy is the length from the soles of the feet to the top of the head when the dummy is standing, in centimeters. In this embodiment, there are three default options, namely 170 cm, 175 cm, and 180 cm.

[0064] The inflation frequency at rest is the number of breaths per minute of an adult male at rest, in units of times / minute. The default value in this embodiment is 16 times.

[0065] The resting inflation volume is the (estimated) tidal volume of an adult male at rest, in milliliters. In this embodiment, the resting inflation volume=(height-105)×4.25 is assumed by default.

[0066] The inflation frequency during operation is the number of breaths per minute of an adult male in a working state, with the unit being times / minute. The default value range of this embodiment is 20-60 times.

[0067] The inflation volume for each time during operation is the (estimated) tidal volume for each time in the working state of an adult male, in milliliters; the inflation volume for each time during operation is a floating range, and in this embodiment, the lower limit of the inflation volume for each time during operation is equal to the inflation volume for each time at rest by default, and the upper limit of the inflation volume for each time during operation = (height - 105) × 6; it can be customized.

[0068] The number of inflations is the number of breaths, in times, with a minimum value of 1 and an unlimited maximum value.

[0069] The reference pressure is the minimum value of the internal air pressure of the protective clothing required for an adult male to wear, in kilopascals. The default value in this embodiment is 1.02 kPa.

[0070] The exhaust pressure unit is kilopascals, and the default value of the present embodiment is 1.29 kPa. When the air pressure inside the garment exceeds 1.29 kPa, the excess gas is exhausted to the outside.

[0071] The above-mentioned parameter values, in addition to the default values ​​of this embodiment, can be set separately.

[0072] S2, air pressure monitoring: After the dummy is dressed, the air pressure inside the clothing is continuously measured using an air pressure sensor; and the air pressure value is sent to the controller.

[0073] S3, pre-inflation: Before starting the dummy test, the air source should be used to inflate the interior of the garment, and during the inflation process, the exhaust valve should be closed until the air pressure inside the garment is not lower than the reference pressure, i.e. 1.02 kPa, so that the garment can be used normally.

[0074] S4, pulsating inflation: simulates the breathing of an adult male at rest or at work, and performs pulsating inflation into the garment according to preset parameters. The controller controls the opening or closing of the inflation valve according to the inflation frequency and each inflation volume at rest / at work.

[0075] S5, overpressure exhaust: when the air pressure inside the garment exceeds the exhaust pressure, i.e. 1.29 kPa, the exhaust valve opens and the garment is exhausted to the outside; when the air pressure inside the garment is lower than the reference pressure, i.e. 1.02 kPa, the exhaust valve closes.

[0076] Description of preset parameters:

[0077] (1) Height: There are 3 options: 170, 175, and 180.

[0078] 170cm refers to two standards, the national standard "GB / T 23467-2009 Test Method for Evaluating the Flame Retardant Performance of Clothing under Flashover Conditions Using a Sweating Manikin" and the American Society for Testing and Materials standard "ASTM F2370-2022 Standard Test Method for Measuring the Evaporative Resistance of Clothing Using a Sweating Manikin";

[0079] 175cm and 180cm are mainly referenced to the dummy systems used in reality.

[0080] (2) Inflation frequency and each inflation volume: Both involve resting and working states. In the resting state, according to the "Guidelines for the Clinical Application of Mechanical Ventilation (2006)" issued by the Chinese Medical Association Critical Care Medicine Branch in 2006, the frequency is taken as the average of the upper and lower limits (12-20 times) of 16 times / minute; in the calculation formula for each inflation volume, the body weight adopts the Broca modified formula commonly used in the medical field, and 4.25 is taken from half of the tidal volume corresponding to the average of the upper and lower limits of kilogram volume (5-12). In the working state, the upper limit of the inflation frequency refers to the upper limit of the respiratory rate of marathon athletes, which is 60, and the lower limit of the inflation frequency adopts the upper limit of the respiratory rate in mechanical ventilation, which is 20; the lower limit of each inflation volume adopts the resting state, and the upper limit adopts half of the maximum tidal volume recommended by the above guidelines.

[0081] (3) Inflation times: The relevant standards for dummy testing specify the time for relevant testing. Combined with the inflation frequency of this system, the corresponding inflation times can be obtained.

[0082] (4) Reference pressure and exhaust pressure: Refer to Appendix A of the national standard "GB24539-2021 Chemical Protective Clothing" for the overall air tightness test method of chemical protective clothing. The upper limit of the inflation pressure of chemical protective clothing is 1.29 kPa, and the test pressure should not be less than 1.02 kPa.

[0083] Example 3

[0084] The pulsating inflation control system and method are used to perform dummy testing on the airtight protective clothing. The specific process is as follows:

[0085] The first step is to prepare the dummy: the exhaust valve is fixed to the suspension device on the dummy's head; when the gas source is a compressed gas cylinder, all parts of the system are fixed to the dummy's back, and then the gas cylinder valve is opened; when the gas source is a gas pipeline, all parts except the gas source are fixed to the dummy's back; the fixing method of this system refers to the industry standard "XF 124-2013 Positive Pressure Fire Fighting Air Respirator"; in combination with the testing requirements and in accordance with relevant standards, the dummy is dressed in the clothing to be tested.

[0086] The second step is working condition simulation: using this system, based on the five steps shown in the pulsating inflation control method of the above embodiment 2, according to the two working conditions of the personnel at rest and working, the dynamic balance of the gas pressure inside the clothing is controlled respectively to realize the simulation of the dressing working condition.

[0087] The third step is dummy testing: For both resting and working conditions, conduct thermal resistance, moisture resistance or flame retardancy experiments in accordance with the procedures specified in relevant standards to test the performance of the entire airtight protective clothing.

[0088] Step 4: Dummy cleaning: After completing the dummy inspection, turn off the system application, working power supply, air source and valve in sequence, remove the clothing and the system in sequence, and restore the dummy to its initial state.

[0089] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pulsating inflation control system, characterized in that: include: Air source, inflation valve, exhaust valve, air pressure sensor and controller; The air source is used to inflate the interior of the garment; The inflation valve connects the garment with the air source and is used to control the inflation of the garment; The exhaust valve communicates the inside and outside of the garment and is used to control the exhaust of the garment to the outside; The air pressure sensor is used to measure the air pressure inside the garment and send the air pressure value to the controller; The controller is used to control the inflation valve and the exhaust valve according to the air pressure value.

2. A pulsating inflation control system according to claim 1, characterized in that: The gas source adopts a compressed gas cylinder; the controller adopts a single-chip microcomputer; the controller, the air pressure sensor and the inflation valve are integrated into one; the exhaust valve is arranged on the head or top of the clothing, sharing the reserved interface of the dummy head.

3. A pulsating inflation control method, characterized in that: A pulsating inflation control system as claimed in claim 1 or 2, comprising the following steps: S1, preset parameters, including: dummy height, inflation frequency at rest, inflation volume per time at rest, inflation frequency during operation, inflation volume per time during operation, inflation times, reference pressure, and exhaust pressure; among them, The inflation frequency at rest is the number of breaths per minute taken by the wearer at rest; The inflation volume at rest is the tidal volume of each time when the wearer is at rest; The inflation frequency during operation is the number of breaths per minute of the wearer in the working state; The inflation volume for each operation is the tidal volume for each operation of the wearer; S2, after the dummy is dressed, the air pressure inside the clothing is continuously measured using the air pressure sensor and the air pressure value is sent to the controller; S3, pre-inflation: before the dummy test is started, the air source is used to inflate the interior of the garment, and the exhaust valve is closed during the inflation process until the air pressure inside the garment is not lower than the reference pressure, and the garment reaches a normal use state; S4, pulsating inflation: simulates breathing at rest or during work, and performs pulsating inflation into the garment according to preset parameters. The controller controls the opening or closing of the inflation valve according to the inflation frequency and each inflation volume at rest / work; S5, overpressure exhaust: when the air pressure inside the garment exceeds the exhaust pressure, the exhaust valve opens and the garment is exhausted to the outside; when the air pressure inside the garment is lower than the reference pressure, the exhaust valve closes.

4. A pulsating inflation control method according to claim 3, characterized in that: The inflation frequency at rest is 12-20 times / minute.

5. A pulsating inflation control method according to claim 3, characterized in that: The amount of air filled each time at rest = (height - 105) × 4.25; the height is in centimeters and the amount of air filled is in milliliters.

6. A pulsating inflation control method according to claim 3, characterized in that: The inflation frequency during operation is 20-60 times / minute.

7. A pulsating inflation control method according to claim 5, characterized in that: The lower limit of each inflation volume during operation is the same as the inflation volume at rest; the upper limit of each inflation volume during operation = (height - 105) × 6; wherein the height is in centimeters and the inflation volume is in milliliters.

8. A pulsating inflation control method according to claim 3, characterized in that: The base pressure is 1.02 kPa, the exhaust pressure is 1.29 kPa, and the number of inflations is greater than or equal to 1.

9. A method for detecting a dummy of an airtight protective clothing, characterized in that: A pulsating inflation control method as described in any one of claims 3 to 8 is used to perform dummy testing on airtight protective clothing. Under resting or working conditions, the dynamic balance of air pressure inside the clothing is controlled to achieve simulation of dressing conditions for testing clothing performance.

10. The method for detecting a dummy of an airtight protective clothing according to claim 9, characterized in that: The specific process is as follows: The first step is to put the dummy in the clothes to be tested; The second step is to control the dynamic balance of air pressure inside the garment under resting or working conditions according to the pulsating inflation control method, so as to simulate the dressing conditions; The third step is to conduct thermal resistance, moisture resistance or flame retardancy tests to test the performance of clothing in accordance with the procedures specified in relevant standards for resting or working conditions; Step 4. After completing the dummy inspection, turn off the working power supply, controller, air source and valve, and remove the clothing and pulsating inflation control system.

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