A tent air tightness detection method suitable for multiple scenes

Abstract

A method for testing the airtightness of a tent applicable to multiple scenarios includes the following steps: placing an airbag between two abutment components; inflating the airbag and abutting it against the two abutment components in the vertical direction, while allowing it to expand freely in the horizontal direction; continuously filling the airbag with hot air at a temperature denoted as T1; the airbag inflating and abutting against the two abutment components; stopping the filling of the airbag with hot air when the monitored abutment force reaches a threshold; allowing the airbag to stand for a period of time, and determining whether the airbag leaks by monitoring whether the air pressure inside the airbag changes during the standing time; expelling the hot air from the airbag and filling it with cold air of a preset volume denoted as V1 and a temperature denoted as T2; allowing the airbag to stand for a period of time, while the airbag inflates and continues to cool down under the action of the cold air; when the monitored airbag temperature reaches a threshold, continuing to allow the airbag to stand for a period of time, and determining whether the airbag leaks by monitoring whether the air pressure inside the airbag changes during the continued standing time.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing, and more particularly to a method for testing the airtightness of tents applicable to multiple scenarios. Background Technology

[0002] With the development of synthetic materials and the increasing demand for outdoor sports, the market for outdoor tents is gradually expanding. Inflatable tents, as a type of outdoor tent, are widely used by outdoor enthusiasts who need to camp due to their portability. Inflatable tents typically consist of fabric and air bladders (support structure). To use them, simply inflate the air bladders with a certain amount of air to make the tent stand up.

[0003] For inflatable tents, the airtightness of the air bladder is crucial. Currently, the airtightness of inflatable tents on the market is typically tested using the pressure difference method. This method involves inflating the air bladder with air and then measuring the amount of air leakage over a period of time. The amount of leakage is then used to determine if the inflatable tent's airtightness is up to standard. While the pressure difference method is usually conducted at room temperature, in real-world applications, users may take inflatable tents to areas with extremely high or low temperatures, such as deserts and snow-capped mountains. When the air bladder is used in these environments, the material changes due to temperature. At higher temperatures, the elasticity of the air bladder material increases, allowing the air bladder to inflate to a larger volume. This increased elasticity and expansion alters the airtightness. Conversely, at lower temperatures, the extensibility of the air bladder material decreases, potentially preventing the bladder from inflating as much gas as it would at room temperature. Forcing inflation may also compromise the airtightness.

[0004] Therefore, it is necessary to provide a tent airtightness testing method applicable to multiple scenarios that can effectively test the airtightness of airbags at low and high temperatures respectively, and can avoid poor airtightness of airbags after temperature changes the elasticity and ductility of airbag materials. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-scenario adaptation method for an air tightness testing device that can effectively detect the air tightness of airbags at different temperatures and avoid poor air tightness of airbags after temperature changes the elasticity and extensibility of airbag materials.

[0006] According to one aspect of this application, a method for testing the airtightness of a tent applicable to multiple scenarios is provided, wherein the tent includes an airbag that serves as a support structure after inflation, and the method includes the following steps:

[0007] The airbag is placed between the two abutting parts; the airbag inflates and abuts against the two abutting parts in the vertical direction, and expands freely in the horizontal direction.

[0008] The airtightness tester continuously fills the airbag with hot air at a temperature of T1, and satisfies the following relationship: T1≥30℃;

[0009] The airbag inflates and comes into contact with two abutting parts; wherein, a pressure sensor is provided at the position where the two abutting parts come into contact with the inflated airbag to monitor the contact force, and when the monitored contact force reaches a threshold, hot air is stopped being injected into the airbag;

[0010] After standing for a period of time, the air pressure inside the airbag is monitored by an airtightness detector connected to the airbag to determine whether the airbag is leaking.

[0011] Expel the hot air from the airbag and fill it with cold air of a preset volume denoted as V1 and temperature denoted as T2, satisfying the relationship: T2≤0℃;

[0012] After being left to stand for a period of time, the airbag expands and continues to cool down under the action of cold air. Temperature sensors are installed at the positions where the two abutting parts are placed to monitor the airbag temperature. When the monitored airbag temperature reaches a threshold, the airbag is left to stand for a period of time. The airbag leaks by monitoring whether the air pressure inside the airbag changes during the period of standing.

[0013] More preferably, the two abutment members include:

[0014] The lower abutment is used to place the airbag;

[0015] The upper abutment is directly opposite the lower abutment and located on the side of the airbag away from the lower abutment; wherein,

[0016] The pressure sensor is located on the side of the upper abutment facing the airbag; when the airbag is placed between the two abutments and has not yet been filled with hot air to expand, when viewed in the horizontal direction, the projections of the pressure sensor and the airbag on the vertical plane do not overlap.

[0017] When hot air is injected into the airbag to inflate it, the airbag comes into contact with the side of the upper abutment member facing the airbag, and then comes into contact with the pressure sensor and applies abutment force.

[0018] Even better,

[0019] The temperature sensor is located on the side of the lower abutment facing the airbag. When the airbag is placed between the two abutments and has not yet been filled with cold air to expand, when viewed vertically, the projections of the pressure sensor and the temperature sensor on the horizontal plane are completely within the projection of the airbag on the horizontal plane.

[0020] More preferably, the airbag is made of thermoplastic polyurethane rubber material, and the tent also includes fabric sewn to the airbag;

[0021] When the airbag is placed between the two contact parts and inflated with cold air, the temperature sensor is in contact with the airbag when viewed horizontally.

[0022] When the airbag is placed between the two abutting parts, the fabric sewn onto the airbag is folded open so that the airbag comes into direct contact with the temperature sensor on the lower abutting part.

[0023] More preferably, the pressure sensor includes:

[0024] The first pressure sensor is located at the initial contact point between the two abutting parts and the airbag after it inflates;

[0025] The lower abutment is also provided with a positioning groove, and the temperature sensor is located in the positioning groove. When viewed in the horizontal direction, the temperature sensor and the first pressure sensor are both located on the central symmetrical line of the positioning groove. When the airbag inflates, at least a part of the airbag sinks into the positioning groove.

[0026] More preferably, the pressure sensor further includes:

[0027] The second pressure sensor, having at least one of them, is arranged side by side with the first pressure sensor when viewed in the horizontal direction.

[0028] After the airbag comes into contact with the first pressure sensor, if the contact force detected by the first pressure sensor does not reach the threshold, the airbag continues to inflate and come into contact with the second pressure sensor. When the second pressure sensor detects the contact force, the inflation of hot air into the airbag stops.

[0029] Even better,

[0030] When there are multiple second pressure sensors, the multiple second pressure sensors are arranged at intervals in the horizontal direction, and any one of the first and last second pressure sensors is spaced apart from and adjacent to the first pressure sensor in the horizontal direction.

[0031] Based on the distance between each second pressure sensor and the first pressure sensor, one of the second pressure sensors is activated; when the airbag comes into contact with the first pressure sensor, if the contact force detected by the first pressure sensor does not reach the threshold, the airbag continues to inflate and come into contact with the activated second pressure sensor; when the activated second pressure sensor detects the contact force, the inflation of hot air into the airbag stops.

[0032] Even better,

[0033] Viewed horizontally, the upper abutment is parallel to the lower abutment. After hot air is injected into the airbag, the airbag begins to inflate. When the airbag abuts against the pressure sensor, the pressure sensor begins to monitor the abutment force F. The pressure sensor has a preset pressure threshold F1. When the following relationship is satisfied:

[0034] When F = F1,

[0035] The airtightness detector stops filling the airbag with hot air.

[0036] More preferably, the temperature sensor is preset with a first temperature threshold W1 and a second temperature threshold W2, satisfying the following relationship:

[0037] T1≥W1;

[0038] 65℃≥W1≥30℃;

[0039] T2≤W2;

[0040] -30℃≤W2≤0℃;

[0041] The temperature of the airbag detected by the temperature sensor is denoted as T. After the airbag is filled with cold air of a preset volume V1 and temperature T2, it is left to stand for a period of time, during which the airbag expands and continues to cool down under the action of the cold air. Temperature sensors for monitoring the airbag temperature are installed at the positions where the two abutment members place the airbag.

[0042] If the following relation is satisfied:

[0043] T = W2,

[0044] Then, the timer starts to remain stationary for a period of time P, and the air pressure inside the airbag is monitored to determine whether the airbag is leaking.

[0045] More preferably, before continuously filling the airbag with hot air, the temperature sensor obtains the initial temperature T0 of the airbag. In the step "expelling the hot air from the airbag and filling it with cold air of a preset volume V1 and temperature T2, satisfying the relationship: T2≤0℃",

[0046] After the hot air inside the airbag is expelled, the airbag remains stationary for a period of time, denoted as S. The start time of the stationary period S is denoted as s1, and the end time is denoted as s2. At the start time s1, the hot air inside the airbag has been completely extracted. At the end time s2, the following relationship is satisfied:

[0047] T = T0;

[0048] 10℃≤T0≤20℃.

[0049] The present invention has the following beneficial effects:

[0050] By sequentially filling the airbag with hot and cold air, the airtightness testing device can detect the airtightness of the airbag at low and high temperatures, respectively. After inflation, the airbag expands and presses against a pressure sensor on the contact surface. The airbag expands horizontally, allowing the pressure sensor to effectively detect the contact force exerted by the airbag on its surface, and enabling the airbag to gradually expand to a certain extent. The pressure sensor monitors the contact force of the airbag and stops filling with hot air when the contact force reaches a threshold. The airbag expands to a certain extent after the elastic change of the airbag material, allowing the airtightness of the airbag material under elastic change to be effectively detected. By filling the airbag with sufficient cold air and starting airtightness testing when the airbag temperature reaches a threshold, the airtightness of the airbag material under ductility change can be effectively detected. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0052] Figure 1 This is a flowchart of the method described in one embodiment of this application;

[0053] Figure 2 This is a three-dimensional structural diagram of the tent with the abutting member abutting it according to one embodiment of this application;

[0054] Figure 3 This is an enlarged perspective view of the tent structure with the abutting member abutting in one embodiment of this application;

[0055] Figure 4 This is a three-dimensional structural diagram of the tent connected to the airtightness detection device according to one embodiment of this application;

[0056] Figure 5 This is a schematic diagram showing the state of the airbag not contacting the upper contact member in one embodiment of this application;

[0057] Figure 6 This is a schematic diagram showing the state of the first pressure sensor of the airbag abutting the upper abutting member according to an embodiment of this application;

[0058] Figure 7 This is a schematic diagram showing the state of the second pressure sensor of the airbag abutting the upper abutting member according to one embodiment of this application;

[0059] Figure 8This is a schematic diagram showing the state of the airbag abutting against the upper abutment member in one embodiment of this application;

[0060] Explanation of reference numerals: 100, tent; 110, airbag; 200, abutment; 210, upper abutment; 211, pressure sensor; 211A, first pressure sensor; 211B, second pressure sensor; 220, lower abutment; 221, temperature sensor; 222, positioning groove; 300, airtightness testing equipment. Detailed Implementation

[0061] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0062] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] Please refer to Figure 1 - Figure 8 This application provides a method for testing the airtightness of a tent applicable to multiple scenarios, wherein the tent includes an airbag that serves as a support structure after inflation, and the method includes the following steps:

[0065] S10 places the airbag between the two abutting parts; wherein, after the airbag inflates, it abuts against the two abutting parts in the vertical direction and expands freely in the horizontal direction;

[0066] The S20 airtightness tester continuously fills the airbag with hot air at a temperature of T1, and satisfies the relationship: T1≥30℃;

[0067] The S30 airbag inflates and abuts against the two abutting parts; wherein, a pressure sensor is provided at the position where the two abutting parts abut against the inflated airbag to monitor the abutting force, and when the monitored abutting force reaches a threshold, hot air is stopped being injected into the airbag.

[0068] The S40 is left to stand for a period of time, and the air pressure inside the airbag is monitored by an airtightness detector connected to the airbag during the standing time to determine whether the airbag is leaking.

[0069] S50 discharges the hot air from the airbag and fills it with a preset volume of cold air denoted as V1 and a temperature of T2, satisfying the relationship: T2≤0℃;

[0070] S60 is left to stand for a period of time, and the airbag expands and continues to cool down under the action of cold air. Temperature sensors are provided at the positions where the two abutting parts are placed to monitor the airbag temperature. When the monitored airbag temperature reaches a threshold, it is left to stand for a period of time, and the airbag leakage is determined by monitoring whether the air pressure inside the airbag changes during the continued standing time.

[0071] By filling the airbags with hot air at a temperature of 30°C or higher, the effects of high-temperature environments on the expansion performance of tent materials and airbags can be simulated. For example, daytime temperatures in deserts range from 40°C to 50°C, and in some desert areas even exceed 55°C. The temperature range in tropical rainforests is typically 30°C to 40°C, and the temperature on sunny beaches or lakeshores in midsummer is usually 35°C to 45°C due to strong sunlight reflection. Under these high-temperature conditions, the molecules in the airbag material reduce their intermolecular forces due to thermal motion, making them easier to move. This allows the airbag material to be more easily stretched or deformed, thus exhibiting greater elasticity. When the resistance force after the airbag expands reaches the threshold set by the pressure sensor, it indicates that the airbag has expanded to a larger volume exhibiting greater elasticity. Therefore, it is possible to effectively measure the airtightness under this greater elasticity, preventing poor airtightness when the inflatable tent is put into actual use under larger airbag material elasticity. During inflation, the airbag expands freely horizontally between the two contact points, allowing it to continue expanding to its maximum elastic volume even when its surface is in contact with the contact points. After the airbag is filled with hot air and inflation stops, the system is left to stand for a period of time, and the air pressure stability within the airbag is monitored. If the pressure change during the standing time is below the leakage standard, the airbag's airtightness is considered satisfactory. By expelling hot air and then filling it with cold air at a temperature below or equal to 0°C, the tent's performance in cold environments is simulated, such as the low temperatures of winter or the cold climate of high-altitude regions. Under low-temperature conditions, the airbag material typically becomes more brittle and less ductile. If the airbag inflates to a certain volume as usual, its airtightness will decrease due to the reduced ductility. Therefore, testing whether the airbag can maintain a seal under these conditions helps ensure the tent's stability in frigid weather. A temperature sensor contacts the surface of the airbag to detect its temperature in real time. Measurement of the airbag's airtightness begins when the temperature reaches a threshold. The airbag can be heated or cooled to the target temperature for testing by heat transfer from hot or cold air. At these temperatures, the airbag's elasticity and extensibility change; starting the airtightness test at these temperatures ensures more reasonable and accurate results.

[0072] More preferably, the two abutment members include:

[0073] The lower abutment is used to place the airbag;

[0074] The upper abutment is directly opposite the lower abutment and located on the side of the airbag away from the lower abutment; wherein,

[0075] The pressure sensor is located on the side of the upper abutment facing the airbag; when the airbag is placed between the two abutments and has not yet been filled with hot air to expand, when viewed in the horizontal direction, the projections of the pressure sensor and the airbag on the vertical plane do not overlap.

[0076] When hot air is injected into the airbag to inflate it, the airbag comes into contact with the side of the upper abutment member facing the airbag, and then comes into contact with the pressure sensor and applies abutment force.

[0077] The upper abutment is located on the side of the airbag opposite to the lower abutment. When deflated, the airbag material spreads out on the lower abutment, and the projections of the pressure sensor and the airbag in the vertical plane do not overlap, indicating that the surface of the pressure sensor and the surface of the airbag are not in contact at this time. When inflated, the airbag gradually expands and begins to abut against the pressure sensor on the upper abutment. This allows the pressure sensor to detect the contact force and prevent over-inflation that could damage the airbag. When the pressure sensor reaches a threshold, it indicates that the airbag has expanded to a predetermined volume, and an airtightness test can be performed based on this volume.

[0078] Even better,

[0079] The temperature sensor is located on the side of the lower abutment facing the airbag. When the airbag is placed between the two abutments and has not yet been filled with cold air to expand, when viewed vertically, the projections of the pressure sensor and the temperature sensor on the horizontal plane are completely within the projection of the airbag on the horizontal plane.

[0080] The temperature sensor is located on the side of the lower abutment facing the airbag, ensuring effective contact and detection of the airbag's surface temperature. Before inflation with cold air, when observed vertically (perpendicular to the surface of the lower abutment), if the projections of the pressure and temperature sensors on the horizontal plane are entirely within the projection of the airbag on the horizontal plane, it indicates that the contact surfaces of the temperature and pressure sensors are both within the airbag's surface, allowing for effective contact and measurement of temperature and pressure data. Therefore, placing the airbag in this specific position before inflation ensures effective measurement of pressure and temperature data both before and after uniform inflation.

[0081] More preferably, the airbag is made of thermoplastic polyurethane rubber material, and the tent also includes fabric sewn to the airbag;

[0082] When the airbag is placed between the two contact parts and inflated with cold air, the temperature sensor is in contact with the airbag when viewed horizontally.

[0083] When the airbag is placed between the two abutting parts, the fabric sewn onto the airbag is folded open so that the airbag comes into direct contact with the temperature sensor on the lower abutting part.

[0084] Thermoplastic polyurethane rubber (TPU) possesses excellent abrasion resistance, weather resistance, and UV resistance, making it suitable for repeated use in various complex outdoor environments. This makes it ideal for airbags, effectively increasing their lifespan. Furthermore, TPU's superior elasticity allows the airbags to inflate effectively under various conditions, providing the necessary support for the tent. Sewing the fabric to the airbags enhances the overall structural stability of the inflatable tent. Additionally, the fabric is typically made of high-strength woven material with a coating, ensuring good performance even in harsh environments. When the airbag inflates and abuts against the two abutment pieces, the sewn-on fabric should be opened first to prevent the fabric from restricting the abutment pieces from effectively holding the airbag in place after inflation.

[0085] More preferably, the pressure sensor includes:

[0086] The first pressure sensor is located at the initial contact point between the two abutting parts and the airbag after it inflates;

[0087] The lower abutment is also provided with a positioning groove, and the temperature sensor is located in the positioning groove. When viewed in the horizontal direction, the temperature sensor and the first pressure sensor are both located on the central symmetrical line of the positioning groove. When the airbag inflates, at least a part of the airbag sinks into the positioning groove.

[0088] The first pressure sensor is located at the initial contact position after the airbag inflates, indicating that it is directly above the airbag. When the airbag inflates uniformly and is not in contact with the upper abutment, it appears elliptical in the horizontal direction. At this time, the highest point of the inflated airbag remains near the first pressure sensor, allowing it to be the first to obtain pressure data when the airbag contacts the upper abutment. The lower abutment has a recessed arc-shaped positioning groove, which allows the airbag to expand upwards along the groove during inflating, preventing arbitrary horizontal expansion and instability in the contact surfaces between the airbag and the upper and lower abutments. Furthermore, the design of both the temperature sensor and the first pressure sensor being located on the symmetrical line of the positioning groove allows the airbag to contact the lower temperature sensor even before inflating, and ensures that the highest point of the airbag surface contacts the first pressure sensor immediately after symmetrical horizontal expansion along the positioning groove.

[0089] More preferably, the pressure sensor further includes:

[0090] The second pressure sensor, having at least one of them, is arranged side by side with the first pressure sensor when viewed in the horizontal direction.

[0091] After the airbag comes into contact with the first pressure sensor, if the contact force detected by the first pressure sensor does not reach the threshold, the airbag continues to inflate and come into contact with the second pressure sensor. When the second pressure sensor detects the contact force, the inflation of hot air into the airbag stops.

[0092] In this design, one or more second pressure sensors are arranged side-by-side with the first pressure sensor on the upper contact member. This allows the airbag to sequentially contact the second pressure sensors from near to far as it expands horizontally, starting with the first pressure sensor. If the contact force detected by the first pressure sensor does not reach a threshold, the airbag will continue to inflate. However, as the contact area of ​​the airbag on the upper contact member increases and exceeds the contact force sensing surface of the first pressure sensor, the airbag distributes the contact force to other surfaces on the upper contact member beyond the contact force sensing surface. This can lead to inaccurate contact force data. If the contact force data is inaccurate, using the contact force threshold to determine whether the airbag needs inflation is unreasonable. Therefore, other methods are needed to determine whether to stop inflating the airbag. When at least one second pressure sensor, arranged side-by-side with the first pressure sensor, detects contact force, it indicates that the contact area between the airbag and the upper contact member has reached a certain size, indirectly indicating that the airbag has expanded to a certain extent horizontally. Therefore, the location of the second pressure sensor can be designed to determine whether the airbag has reached a certain level of inflation, and the airtightness testing equipment can be notified to stop inflating the airbag after the second pressure sensor detects the contact force.

[0093] Even better,

[0094] When there are multiple second pressure sensors, the multiple second pressure sensors are arranged at intervals in the horizontal direction, and any one of the first and last second pressure sensors is spaced apart from and adjacent to the first pressure sensor in the horizontal direction.

[0095] Based on the distance between each second pressure sensor and the first pressure sensor, one of the second pressure sensors is activated; when the airbag comes into contact with the first pressure sensor, if the contact force detected by the first pressure sensor does not reach the threshold, the airbag continues to inflate and come into contact with the activated second pressure sensor; when the activated second pressure sensor detects the contact force, the inflation of hot air into the airbag stops.

[0096] The design, featuring multiple second pressure sensors arranged horizontally at intervals on the upper contact element, allows these sensors to detect the contact force after the airbag inflates to different degrees. This interval arrangement can be viewed as a scale, effectively detecting whether the contact area of ​​the airbag reaches a certain level. If either the first or last second pressure sensor is horizontally spaced and adjacent to the first pressure sensor, it means that, when viewed horizontally, all the second pressure sensors can be arranged at intervals to the right of the first pressure sensor (the first second pressure sensor is adjacent to the first pressure sensor), or all can be arranged at intervals to the left of the first pressure sensor (the last second pressure sensor is adjacent to the first pressure sensor). Based on the distance between each second pressure sensor and the first pressure sensor, and the type of airbag to be tested, the airtightness testing device activates the appropriate second pressure sensor. The activated second pressure sensor is used to send a signal to the airtightness testing device and stop inflating the airbag after detecting the contact force when the contact surface between the airbag to be tested and the upper abutment exceeds the contact force sensing surface of the first pressure sensor and the contact force on the first pressure sensor has not reached the threshold. This is because at this time, the airbag can be considered to have inflated to the preset maximum extent.

[0097] Even better,

[0098] Viewed horizontally, the upper abutment is parallel to the lower abutment. After hot air is injected into the airbag, the airbag begins to inflate. When the airbag abuts against the pressure sensor, the pressure sensor begins to monitor the abutment force F. The pressure sensor has a preset pressure threshold F1. When the following relationship is satisfied:

[0099] When F = F1,

[0100] The airtightness detector stops filling the airbag with hot air.

[0101] The design of the upper abutment piece being parallel to the lower abutment piece ensures a uniform distribution of space between the two abutment pieces, allowing the airbag to expand evenly in the horizontal direction between them under the action of the positioning groove. When the airbag abuts against the pressure sensor, the pressure sensor can obtain the abutment force F. As the airbag continues to expand, the tension on the surface of the airbag continuously increases, and the abutment force also continues to increase. When the abutment force reaches a certain level, it indicates that the tension of the airbag has reached its limit, and it is not advisable to inflate the airbag further.

[0102] More preferably, the temperature sensor is preset with a first temperature threshold W1 and a second temperature threshold W2, satisfying the following relationship:

[0103] T1≥W1;

[0104] 65℃≥W1≥30℃;

[0105] T2≤W2;

[0106] -30℃≤W2≤0℃;

[0107] The temperature of the airbag detected by the temperature sensor is denoted as T. After the airbag is filled with cold air of a preset volume V1 and temperature T2, it is left to stand for a period of time, during which the airbag expands and continues to cool down under the action of the cold air. Temperature sensors for monitoring the airbag temperature are installed at the positions where the two abutment members place the airbag.

[0108] If the following relation is satisfied:

[0109] T = W2,

[0110] Then, the timer starts to remain stationary for a period of time P, and the air pressure inside the airbag is monitored to determine whether the airbag is leaking.

[0111] If T1 is greater than or equal to W1, and W1 is between 30℃ and 65℃, then the temperature of the hot air injected into the airbag in step S20 is sufficient to simulate the tent's use in various high-temperature environments. Similarly, if T2 is less than or equal to W2, and W2 is between -30℃ and 0℃, then the temperature of the cold air injected into the airbag in step S50 is sufficient to simulate the tent's use in various low-temperature environments. A temperature sensor monitors the surface temperature of the outer side of the airbag in real time. After cold air is injected and the airbag is left to stand for a period of time, the surface of the airbag gradually cools down due to heat transfer. When the temperature sensor detects that the surface temperature of the airbag reaches temperature W2, it indicates that the airbag's temperature state is sufficient to simulate the scenario of use in a low-temperature environment. At this time, the airbag material will reduce its extensibility due to the decrease in temperature. With reduced extensibility, when the airbag expands to a certain volume, the surface of the airbag may rupture due to insufficient extensibility, leading to air leakage. Whether the air pressure inside the airbag changes within a detection time P or whether the change exceeds a certain threshold can effectively reflect the airtightness of the airbag (whether it leaks and does not meet product standards).

[0112] More preferably, before continuously filling the airbag with hot air, the temperature sensor obtains the initial temperature T0 of the airbag, in step S50,

[0113] After the hot air inside the airbag is expelled, the airbag remains stationary for a period of time, denoted as S. The start time of the stationary period S is denoted as s1, and the end time is denoted as s2. At the start time s1, the hot air inside the airbag has been completely extracted. At the end time s2, the following relationship is satisfied:

[0114] T = T0;

[0115] 10℃≤T0≤20℃.

[0116] After the hot air is expelled from the airbag, the surface of the airbag still retains a high temperature due to heat transfer. If cold air is directly inflated at this time, not only will the short-term temperature difference damage the airbag material, but it will also affect the results of subsequent airtightness tests because the airbag state is inconsistent between the two inflations. Therefore, after the hot air is expelled, the airbag needs to stand still for a period of time S. The start time s1 is set after all the hot air inside the airbag has been extracted (monitored by the air pressure monitoring device), and the end time s2 is set only when the temperature T obtained by the temperature sensor is within the room temperature range, thus ending the time period S.

[0117] According to steps S10-S60, this specific embodiment provides a specific example to simulate the airtightness test of the airbags of an inflatable tent at different temperatures:

[0118] Instance parameter settings:

[0119] The resistance force recorded by the pressure sensor is denoted as F.

[0120] The airbag temperature recorded by the temperature sensor is denoted as T.

[0121] The temperature T1 of the hot air is set to 80℃.

[0122] The temperature T2 of the cold air is set to -50℃, and the volume V1 is set to 300L.

[0123] The pressure sensor has a preset pressure threshold F1 of 200N, where N is the unit of force, Newton.

[0124] The time period after the airbag extracts the hot air is denoted as S, and the start time of time period S is denoted as S1 and the end time is denoted as S2.

[0125] The initial temperature T0 before airbag testing is set to 25℃.

[0126] Example process:

[0127] 1. The airbag is placed between the lower abutments, and the distance D between the upper and lower abutments is 10cm. The temperature sensor records the initial temperature T0 of the airbag at this time.

[0128] 2. Inflate the airbag with hot air at temperature T1. After the airbag expands to abut against the abutment, it continues to expand in the horizontal direction.

[0129] Scenario 1: When the first pressure sensor of the pressure sensor detects that the resistance force F applied by the airbag to the air pressure sensor reaches 200N, that is, F≥F1, then the inflation of the airbag will stop.

[0130] Scenario 2: Activate a second pressure sensor. When the first pressure sensor detects that the airbag's contact force F applied to the air pressure sensor has not reached 200N and continues to expand in the horizontal direction, the inflation of the airbag will stop after the second pressure sensor detects the contact force.

[0131] 3. Stop filling the airbag with 80°C hot air and let the airbag stand still for a period of time. When the temperature sensor detects that the real-time temperature of the airbag is T = 50°C, which is equal to the first temperature threshold W1, the airtightness device will start to detect the amount of hot air leakage in the airbag within the time period T1.

[0132] 4. Expel the hot air from the airbag and let the airbag stand still for a period of time S. During the time period S, the temperature of the airbag will return from the higher temperature to the initial temperature T0.

[0133] 5. Inflate the airbag with 300L of cold air at -50℃, and let the airbag stand for a period of time. When the temperature sensor detects that the real-time temperature of the airbag is T = -10℃, which is equal to the second temperature threshold W, the airtightness device starts to detect the amount of hot air leakage in the airbag within the time period T2.

[0134] Therefore, by sequentially filling the airbag with hot air and then with cold air, the airtightness testing device can detect the airtightness of the airbag at low and high temperatures, respectively. After inflation, the airbag expands and presses against a pressure sensor on the contact element. Since the airbag expands horizontally, the pressure sensor on the contact element can effectively detect the contact force exerted by the airbag on the sensor surface, allowing the airbag to gradually expand to a certain extent. The pressure sensor on the contact element monitors the contact force of the airbag and stops filling the airbag with hot air when the contact force reaches a threshold. The airbag expands to a certain extent after the elastic change of the airbag material, allowing the airtightness of the airbag material under elastic change to be effectively detected. By filling the airbag with sufficient cold air and starting to detect the airtightness when the airbag temperature reaches a threshold, the airtightness of the airbag material under ductility change can be effectively detected.

[0135] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A method for testing the airtightness of a tent applicable to multiple scenarios, wherein the tent includes an airbag that serves as a support structure after inflation, characterized in that, The method includes the following steps: The airbag is placed between the two abutting parts; the airbag inflates and abuts against the two abutting parts in the vertical direction, and expands freely in the horizontal direction. The airtightness tester continuously fills the airbag with hot air at a temperature of T1, and satisfies the relationship: T1≥30℃; The airbag inflates and comes into contact with two abutting parts; wherein, a pressure sensor is provided at the position where the two abutting parts come into contact with the inflated airbag to monitor the contact force, and when the monitored contact force reaches a threshold, hot air is stopped being injected into the airbag; After standing for a period of time, the air pressure inside the airbag is monitored by an airtightness detector connected to the airbag to determine whether the airbag is leaking. Expel the hot air from the airbag and fill it with cold air of a preset volume denoted as V1 and temperature denoted as T2, satisfying the relationship: T2≤0℃; After being left to stand for a period of time, the airbag expands and continues to cool down under the action of cold air. Temperature sensors are installed at the positions where the two abutting parts are placed to monitor the airbag temperature. When the monitored airbag temperature reaches a threshold, the airbag is left to stand for a period of time. The airbag is then monitored for changes in air pressure during the period of standing to stand to determine whether the airbag is leaking.

2. The method for testing the airtightness of a tent applicable to multiple scenarios according to claim 1, characterized in that, The two abutment components include: The lower abutment is used to place the airbag; The upper abutment is directly opposite the lower abutment and located on the side of the airbag away from the lower abutment; wherein, The pressure sensor is located on the side of the upper abutment facing the airbag; when the airbag is placed between the two abutments and has not yet been filled with hot air to expand, when viewed in the horizontal direction, the projections of the pressure sensor and the airbag on the vertical plane do not overlap. When hot air is injected into the airbag to inflate it, the airbag comes into contact with the side of the upper abutment member facing the airbag, and then comes into contact with the pressure sensor and applies abutment force.

3. The method for testing the airtightness of a tent applicable to multiple scenarios according to claim 2, characterized in that, The temperature sensor is located on the side of the lower abutment facing the airbag. When the airbag is placed between the two abutments and has not yet been filled with cold air to expand, when viewed vertically, the projections of the pressure sensor and the temperature sensor on the horizontal plane are completely within the projection of the airbag on the horizontal plane.

4. The method for testing the airtightness of a tent applicable to multiple scenarios according to claim 3, characterized in that, The airbag is made of thermoplastic polyurethane rubber material, and the tent also includes fabric sewn to the airbag; When the airbag is placed between the two contact parts and inflated with cold air, the temperature sensor is in contact with the airbag when viewed horizontally. When the airbag is placed between the two abutting parts, the fabric sewn onto the airbag is folded open so that the airbag comes into direct contact with the temperature sensor on the lower abutting part.

5. The method for testing the airtightness of a tent applicable to multiple scenarios according to claim 2, characterized in that, The pressure sensor includes: The first pressure sensor is located at the initial contact point between the two abutting parts and the airbag after it inflates; The lower abutment is also provided with a positioning groove, and the temperature sensor is located in the positioning groove. When viewed in the horizontal direction, the temperature sensor and the first pressure sensor are both located on the central symmetrical line of the positioning groove. When the airbag inflates, at least a part of the airbag sinks into the positioning groove.

6. The method for testing the airtightness of a tent applicable to multiple scenarios according to claim 5, characterized in that, The pressure sensor also includes: The second pressure sensor, having at least one of them, is arranged side by side with the first pressure sensor when viewed in the horizontal direction. After the airbag comes into contact with the first pressure sensor, if the contact force detected by the first pressure sensor does not reach the threshold, the airbag continues to inflate and come into contact with the second pressure sensor. When the second pressure sensor detects the contact force, the inflation of hot air into the airbag stops.

7. The method for testing the airtightness of a tent applicable to multiple scenarios according to claim 6, characterized in that, When there are multiple second pressure sensors, the multiple second pressure sensors are arranged at intervals in the horizontal direction, and any one of the first and last second pressure sensors is spaced apart from and adjacent to the first pressure sensor in the horizontal direction. Based on the distance between each second pressure sensor and the first pressure sensor, one of the second pressure sensors is activated; when the airbag comes into contact with the first pressure sensor, if the contact force detected by the first pressure sensor does not reach the threshold, the airbag continues to inflate and come into contact with the activated second pressure sensor; when the activated second pressure sensor detects the contact force, the inflation of hot air into the airbag stops.

8. The method for testing the airtightness of a tent applicable to multiple scenarios according to claim 2, characterized in that, Viewed horizontally, the upper abutment is parallel to the lower abutment. After hot air is injected into the airbag, the airbag begins to inflate. When the airbag abuts against the pressure sensor, the pressure sensor begins to monitor the abutment force F. The pressure sensor has a preset pressure threshold F1. When the following relationship is satisfied: When F = F1, The airtightness detector stops filling the airbag with hot air.

9. A method for testing the airtightness of a tent applicable to multiple scenarios according to claim 2, characterized in that, The temperature sensor is preset with a first temperature threshold W1 and a second temperature threshold W2, satisfying the following relationship: T1≥W1; 65℃≥W1≥30℃； T2≤W2; -30℃≤W2≤0℃； The temperature of the airbag detected by the temperature sensor is denoted as T. After the airbag is filled with cold air of a preset volume V1 and temperature T2, it is left to stand for a period of time, during which the airbag expands and continues to cool down under the action of the cold air. Temperature sensors for monitoring the airbag temperature are installed at the positions where the two abutment members place the airbag. If the following relation is satisfied: T = W2, Then, the timer starts to remain stationary for a period of time P, and the air pressure inside the airbag is monitored to determine whether the airbag is leaking.

10. A method for testing the airtightness of a tent applicable to multiple scenarios according to claim 9, characterized in that, Before continuously filling the airbag with hot air, the temperature sensor obtains the initial temperature T0 of the airbag. In the step "expelling the hot air from the airbag and filling it with cold air of a preset volume V1 and temperature T2, satisfying the relationship: T2≤0℃", After the hot air inside the airbag is expelled, the airbag remains stationary for a period of time, denoted as S. The start time of the stationary period S is denoted as s1, and the end time is denoted as s2. At the start time s1, the hot air inside the airbag has been completely extracted. At the end time s2, the following relationship is satisfied: T = T0; 10℃≤T0≤20℃。

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