Tent airtightness detection method suitable for multiple scenes

Abstract

The invention discloses a tent air tightness detection method suitable for multiple scenes. The method comprises the steps that an air bag is placed between two abutting pieces; after being expanded, the air bag abuts against the two abutting pieces in the vertical direction and freely expands in the horizontal direction; the air bag is continuously filled with hot air with the temperature recorded as T1; the air bag expands and abuts against the two abutting pieces; when the monitored abutting force reaches a threshold value, the air bag is stopped from being inflated with the hot air; standing for a period of time, and judging whether the air bag leaks air or not by monitoring whether the air pressure in the air bag changes or not within the standing time; hot air in the air bag is exhausted, and cold air with the preset volume recorded as V1 and the temperature recorded as T2 is inflated; standing for a period of time, expanding the air bag and continuously cooling under the action of cold air, when the monitored temperature of the air bag reaches a threshold value, continuously standing for a period of time, and judging whether the air bag leaks air or not by monitoring whether the air pressure in the air bag changes or not in the continuous standing time.

Description

Technical Field

[0001] The present invention relates to the field of air tightness detection, and in particular to an air tightness detection method for tents applicable to multiple scenarios. Background Art

[0002] With the development of synthetic materials and the increasing demand for outdoor sports, the market for outdoor tents is gradually expanding. As a type of outdoor tent, inflatable tents are widely used by outdoor enthusiasts who need to camp because of their portability. Inflatable tents are usually composed of fabrics and air bags (support structures). When in use, you only need to fill a certain amount of air into the air bag of the inflatable tent to support the inflatable tent.

[0003] For this kind of inflatable tent, it is very important whether the air tightness of the airbag part is qualified. At present, the air tightness test method of inflatable tents on the market is usually tested by the air pressure difference method. During the implementation of the air pressure difference method, air is first filled into the airbag and the air leakage in the airbag is detected within a period of time after inflation. Finally, the air leakage is used to determine whether the air tightness of the inflatable tent is qualified. Usually, the test of the air pressure difference method is carried out under normal temperature, but in the actual application of the inflatable tent, users may take it to places with higher or lower temperatures, such as desert areas and snow-capped mountains. When the airbag is used in these places, the material of the airbag will also change due to temperature. When the temperature is high, the elasticity of the airbag material will increase, and the airbag can expand to a larger volume. When the elasticity of the airbag material increases and the airbag expands to a larger volume, the air tightness of the airbag will also change. When the temperature is low, the ductility of the airbag material will decrease. At this time, the airbag may not be able to be filled with as much gas as at normal temperature. If a certain amount of gas is forcibly filled, it may also cause the air tightness of the airbag to change.

[0004] Therefore, it is necessary to provide a tent air tightness detection method suitable for multiple scenarios that can effectively detect the air tightness of the airbag at low and high temperatures, and can avoid poor air tightness of the airbag after the temperature changes the elasticity and ductility of the airbag material. Summary of the invention

[0005] The object of the present invention is to provide a multi-scenario adaptation method for an airtightness detection device that can effectively detect the airtightness of an airbag at different temperatures and avoid poor airtightness of the airbag after the temperature changes the elasticity and ductility of the airbag material.

[0006] According to one aspect of the present application, a tent air tightness detection method applicable to multiple scenarios is provided, wherein the tent includes an air bag that serves as a supporting structure after being inflated, and the method includes the steps of:

[0007] The airbag is placed between the two abutting members; wherein the airbag abuts against the two abutting members in the vertical direction after expansion and expands freely in the horizontal direction;

[0008] The airtightness detector continuously fills the airbag with hot air of temperature T1, and the relationship is satisfied: T1 ≥ 30℃;

[0009] The airbag expands and abuts against the two abutting members; wherein a pressure sensor for monitoring the abutting force is provided at the position where the two abutting members abut against the inflated airbag, and when the monitored abutting force reaches a threshold value, the hot air is stopped from being filled into the airbag;

[0010] Let it stand for a while, and use an airtightness detector connected to the airbag to monitor whether the air pressure in the airbag changes during the standing time to determine whether the airbag is leaking;

[0011] The hot air in the airbag is exhausted and filled with cold air of a preset volume V1 and a temperature T2, satisfying the relationship: T2≤0℃;

[0012] The airbag is left to stand for a period of time, and the airbag expands and continues to cool down under the action of cold air, wherein temperature sensors for monitoring the temperature of the airbag are provided at the positions where the two abutment parts place the airbag. When the monitored temperature of the airbag reaches a threshold, the airbag is left to stand for a period of time, and whether the air pressure in the airbag changes during the period of continued standing is monitored to determine whether the airbag is leaking.

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

[0014] A lower abutment member for placing the airbag;

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

[0016] The pressure sensor is arranged on a side of the upper abutment member facing the airbag; when the airbag is placed between the two abutments and has not yet been inflated with hot air, when viewed in the horizontal direction, there is no overlap between the projections of the pressure sensor and the airbag on the vertical plane;

[0017] When hot air is filled into the airbag to expand the airbag, the airbag abuts against the side of the upper abutment member facing the airbag, and then contacts the pressure sensor and applies an abutment force.

[0018] More preferably,

[0019] The temperature sensor is arranged 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 for expansion, when observed in the vertical direction, the projections of the pressure sensor and the temperature sensor on the horizontal plane are completely located within the projection of the airbag on the horizontal plane.

[0020] More preferably, the airbag is made of thermoplastic polyurethane rubber material, wherein the tent further comprises fabric sewn to the airbag;

[0021] When the airbag is placed between the two abutting members and is inflated with cold air, the temperature sensor is in contact with the airbag when viewed in the horizontal direction;

[0022] When the airbag is placed between the two abutting pieces, the fabric sewn on the airbag is folded open to make the airbag directly contact with the temperature sensor on the lower abutting piece.

[0023] More preferably, the pressure sensor comprises:

[0024] A first pressure sensor is located at a position where the two abutting members initially abut against the airbag after expansion;

[0025] A positioning groove is also provided on the lower abutment member, and the temperature sensor is arranged in the positioning groove. When observed in the horizontal direction, the temperature sensor and the first pressure sensor are both located on the central symmetry line of the positioning groove; when the airbag is inflated, at least a portion of the airbag sinks into the positioning groove.

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

[0027] There is at least one second pressure sensor, and when viewed in the horizontal direction, the second pressure sensor is arranged side by side with the first pressure sensor;

[0028] After the airbag abuts against the first pressure sensor, if the abutment force detected by the first pressure sensor does not reach a threshold value, the airbag continues to inflate and abuts against the second pressure sensor. When the second pressure sensor detects the abutment force, the filling of hot air into the airbag stops.

[0029] More preferably,

[0030] When there are multiple second pressure sensors, the multiple second pressure sensors are arranged at intervals in the horizontal direction, and any first and last second pressure sensors are spaced and adjacent to the first pressure sensor in the horizontal direction;

[0031] According to the distance between each second pressure sensor and the first pressure sensor, any one of the second pressure sensors is enabled; when the airbag abuts against the first pressure sensor, if the abutment force detected by the first pressure sensor does not reach the threshold value, the airbag continues to inflate and contact and abut with the enabled second pressure sensor. When the enabled second pressure sensor detects the abutment force, the filling of hot air into the airbag is stopped.

[0032] More preferably,

[0033] When viewed in the horizontal direction, the upper abutment member is parallel to the lower abutment member. After hot air is filled into the airbag, the airbag begins to expand. When the airbag abuts the pressure sensor, the pressure sensor begins to monitor the abutment force F. The pressure sensor is preset with a pressure threshold F1. When the 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, which satisfy the 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 recorded as T. After the airbag is filled with cold air of a preset volume V1 and a temperature T2, it is left to stand for a period of time, and the airbag expands and continues to cool down under the action of the cold air. The positions where the two abutment members place the airbag are provided with temperature sensors for monitoring the temperature of the airbag.

[0042] If the relationship is satisfied:

[0043] T=W2,

[0044] Then start timing the still time P, and determine whether the airbag is leaking by monitoring whether the air pressure in the airbag changes during the time P.

[0045] Preferably, before the hot air is continuously charged into the airbag, the temperature sensor obtains the initial temperature T0 of the airbag, and in the step of "exhausting the hot air in the airbag and charging the cold air with a preset volume V1 and a temperature T2, satisfying the relationship: T2≤0°C",

[0046] After the hot air in the airbag is exhausted, the airbag is left to stand for a period of time, and the standing time period is recorded as S. The starting time of the standing time period S is recorded as s1, and the ending time is recorded as s2. At the starting time s1, the hot air in the airbag is completely extracted, and at the ending time s2, the relationship is satisfied:

[0047] T = T0;

[0048] 10℃≤T0≤20℃.

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

[0050] By filling hot air and cold air into the airbag in turn, the airtightness detection device can detect the airtightness of the airbag at low temperature and high temperature respectively. After inflation, the airbag expands and abuts against the pressure sensor on the abutment, and the airbag expands in the horizontal direction, so that the pressure sensor on the abutment can effectively detect the abutment force applied by the airbag on the surface of the pressure sensor, and the airbag can gradually expand to a certain extent. The abutment force of the airbag is monitored by the pressure sensor on the abutment and hot air is stopped from being filled into the airbag when the abutment force reaches a threshold value. The airbag can expand to a certain extent after the elasticity of the airbag material changes, so that the airtightness of the airbag material under elastic changes can be effectively detected. By filling a sufficient amount of cold air into the airbag and starting to detect the airtightness of the airbag when the temperature of the airbag reaches a threshold value, the airtightness of the airbag material under ductility changes can be effectively detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0052] Figure 1 A flowchart of the method described in one embodiment of the present application;

[0053] Figure 2 This is a schematic diagram of the three-dimensional structure of the tent abutting against the abutting member in one embodiment of the present application;

[0054] Figure 3 It is an enlarged schematic diagram of the three-dimensional structure of the tent abutting against the abutting member in one embodiment of the present application;

[0055] Figure 4 This is a schematic diagram of the three-dimensional structure of the tent connected with the air tightness detection device in one embodiment of the present application;

[0056] Figure 5 This is a schematic diagram of a state in which the airbag in one embodiment of the present application does not abut against the upper abutment member;

[0057] Figure 6 This is a schematic diagram of a state of first pressure sensing of the airbag abutting against the upper abutment member in one embodiment of the present application;

[0058] Figure 7 It is a schematic diagram of the state of the second pressure sensor of the airbag abutting against the upper abutment member in one embodiment of the present application;

[0059] Figure 8This is a schematic diagram of another second pressure sensing state of the airbag abutting against the upper abutment member in one embodiment of the present application;

[0060] Explanation of the accompanying drawings: 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 detection equipment. DETAILED DESCRIPTION

[0061] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0062] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0064] Please refer to Figure 1 - Figure 8 An embodiment of the present application provides a tent air tightness detection method applicable to multiple scenarios, wherein the tent includes an air bag that serves as a supporting structure after being inflated, and the method includes the steps of:

[0065] S10: placing the airbag between the two abutting members; wherein, after the airbag is inflated, it abuts against the two abutting members in the vertical direction and expands freely in the horizontal direction;

[0066] The S20 airtightness detector continuously fills the airbag with hot air at a temperature of T1, and the relationship is satisfied: T1 ≥ 30°C;

[0067] S30 The airbag is inflated and abuts against two abutting members; wherein a pressure sensor for monitoring abutting force is provided at the position where the two abutting members abut against the inflated airbag, and when the monitored abutting force reaches a threshold value, the hot air is stopped from being filled into the airbag;

[0068] S40 is left to stand for a period of time, and an airtightness detector connected to the airbag is used to monitor whether the air pressure in the airbag changes during the standing time to determine whether the airbag is leaking;

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

[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, wherein temperature sensors for monitoring the temperature of the airbag are provided at the positions where the two abutment members place the airbag. When the monitored temperature of the airbag reaches a threshold, it is continued to stand for a period of time and whether the air pressure in the airbag changes during the continued standing time is monitored to determine whether the airbag is leaking.

[0071] Among them, by filling the airbag with hot air with a temperature higher than or equal to 30°C, the influence of some high temperature environments on the expansion performance of tent materials and airbags can be simulated. For example, the temperature in the desert is 40°C to 50°C during the day, and even exceeds 55°C in some desert areas. The temperature range of tropical rainforests is usually 30°C to 40°C. The temperature of the beach or lakeside where the sun shines directly in the summer is usually 35°C to 45°C due to the strong reflection of sunlight in the waterside area. In these high temperature environments, the molecules between the airbag materials will reduce the interaction force between the molecules under the action of thermal motion, and make the molecules easier to move. At this time, the airbag material will be more easily stretched or deformed, so it will show greater elasticity. When the abutment force after the airbag is expanded reaches the threshold set by the pressure sensor, it means that the airbag has expanded to a larger volume with greater elasticity. Therefore, the airtightness under greater elasticity can be effectively measured at this time to prevent the airtightness of the inflatable tent from being poor when the elasticity of the airbag material is larger after it is put into actual use. When the airbag is inflated, the airbag expands freely in the horizontal direction between the two abutments, allowing the airbag to continue to expand to the volume with the largest elasticity even when the surface is in contact with the abutment. After the hot air fills the airbag and the inflation stops, the system is left to stand for a period of time and the stability of the air pressure in the airbag is monitored. If the change in air pressure during the standing time is lower than the leakage standard, the airbag's air tightness is qualified. By exhausting the hot air and filling it with cold air at a temperature of less than or equal to 0°C, the performance of the tent in a cold environment, such as low temperatures in winter or cold climates at high altitudes, is simulated. Under low temperature conditions, the airbag material usually becomes more brittle and less ductile. At this time, if the airbag is expanded to a certain volume as usual, the airtightness of the airbag will decrease due to the reduction in ductility. Therefore, testing whether the airbag can remain sealed in this state helps to ensure the stability of the tent in severe cold weather. The temperature sensor is in contact with the surface of the airbag to detect the temperature of the airbag in real time. When the temperature reaches the threshold, the airbag begins to measure the airtightness of the airbag. The airbag can be heated or cooled to the target temperature for detection under the heat transfer of hot air or cold air. At these temperatures, the elasticity and ductility of the airbag will change. Starting to detect the airtightness of the airbag at this time can make the test results more reasonable and accurate.

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

[0073] A lower abutment member for placing the airbag;

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

[0075] The pressure sensor is arranged on a side of the upper abutment member facing the airbag; when the airbag is placed between the two abutments and has not yet been inflated with hot air, when viewed in the horizontal direction, there is no overlap between the projections of the pressure sensor and the airbag on the vertical plane;

[0076] When hot air is filled into the airbag to expand the airbag, the airbag abuts against the side of the upper abutment member facing the airbag, and then contacts the pressure sensor and applies an abutment force.

[0077] The upper abutment is located on the side of the airbag away from the lower abutment. When not inflated, the airbag material is spread on the lower abutment, and there is no overlapping part between the projection of the pressure sensor and the airbag on the vertical plane, which means that the surface of the pressure sensor and the surface of the airbag are not in contact. When inflated, the airbag gradually expands and begins to abut the pressure sensor of the upper abutment, so that the pressure sensor can sense the abutment force to prevent over-inflation from damaging the airbag. When the monitoring pressure sensor reaches the threshold, it means that the airbag has expanded to a predetermined volume, and air tightness detection can be performed based on this volume.

[0078] More preferably,

[0079] The temperature sensor is arranged 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 for expansion, when observed in the vertical direction, the projections of the pressure sensor and the temperature sensor on the horizontal plane are completely located within the projection of the airbag on the horizontal plane.

[0080] Among them, the temperature sensor is arranged on the side of the lower abutment facing the airbag, which means that the temperature sensor can effectively contact the airbag and detect the temperature of the airbag surface. Before the cold air is filled and expanded, when observed along the vertical direction (i.e., the direction perpendicular to the surface of the lower abutment), if the projection of the pressure sensor and the temperature sensor on the horizontal plane is completely within the projection of the airbag on the horizontal plane, it means that the contact surfaces of the temperature sensor and the pressure sensor of the airbag are within the range of the airbag surface, so that they can effectively contact each other and measure the temperature and pressure data. Therefore, placing the airbag in this specific position before filling with air can ensure that the pressure data or temperature data can be effectively measured both before and after uniform expansion.

[0081] More preferably, the airbag is made of thermoplastic polyurethane rubber material, wherein the tent further comprises fabric sewn to the airbag;

[0082] When the airbag is placed between the two abutting members and is inflated with cold air, the temperature sensor is in contact with the airbag when viewed in the horizontal direction;

[0083] When the airbag is placed between the two abutting pieces, the fabric sewn on the airbag is folded open to make the airbag directly contact with the temperature sensor on the lower abutting piece.

[0084] Among them, thermoplastic polyurethane rubber has excellent wear resistance, weather resistance and UV resistance. This material can be used repeatedly in various complex outdoor environments. Therefore, it is very suitable as the material of the airbag and can effectively increase the service life of the airbag. In addition, the elasticity of the thermoplastic polyurethane rubber material is also very excellent, which can enable the airbag to effectively expand in many special situations to provide the necessary support for the tent. The method of sewing the fabric to the airbag helps to enhance the stability of the overall structure of the inflatable tent. In addition, the fabric is usually made of high-strength material woven fabric plus coating, which enables the fabric to maintain good performance even in harsh environments. When the airbag abuts against the two abutting pieces after expansion, the fabric sewn with the airbag needs to be opened first to avoid the end of the two abutting pieces close to the fabric being restricted by the fabric and unable to effectively clamp the airbag after the airbag is expanded.

[0085] More preferably, the pressure sensor comprises:

[0086] A first pressure sensor is located at a position where the two abutting members initially abut against the airbag after expansion;

[0087] A positioning groove is also provided on the lower abutment member, and the temperature sensor is arranged in the positioning groove. When observed in the horizontal direction, the temperature sensor and the first pressure sensor are both located on the central symmetry line of the positioning groove; when the airbag is inflated, at least a portion of the airbag sinks into the positioning groove.

[0088] Among them, the first pressure sensor is at the initial contact position after the airbag is inflated, which means that the first pressure sensor is directly above the airbag. When the airbag is evenly inflated and does not abut the upper abutment, the airbag is elliptical when viewed in the horizontal direction. At this time, the highest point of the airbag after expansion continues to be maintained near directly below the first pressure sensor, which enables the first pressure sensor to first obtain the pressure data when the airbag abuts the upper abutment. By providing a concave arc-shaped positioning groove on the lower abutment, the airbag will expand upward along the arc-shaped positioning groove when inflated, so as to avoid the airbag from arbitrarily expanding in the horizontal direction and causing the contact surface between the airbag and the upper abutment and the lower abutment to be unstable. In addition, the design that the temperature sensor and the first pressure sensor are both located on the central symmetry line of the positioning groove can allow the airbag to abut the temperature sensor at the low point when it is not inflated, and can allow the highest point of the airbag surface to abut the first pressure sensor at the first time after the airbag expands symmetrically along the positioning groove in the horizontal direction.

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

[0090] There is at least one second pressure sensor, and when viewed in the horizontal direction, the second pressure sensor is arranged side by side with the first pressure sensor;

[0091] After the airbag abuts against the first pressure sensor, if the abutment force detected by the first pressure sensor does not reach a threshold value, the airbag continues to inflate and abuts against the second pressure sensor. When the second pressure sensor detects the abutment force, the filling of hot air into the airbag stops.

[0092] Among them, by setting one or more second pressure sensors side by side with the first pressure sensor on the upper abutment, the airbag can abut the second pressure sensors set side by side from near to far in sequence from the first pressure sensor when expanding in the horizontal direction. Assuming that the abutment force monitored by the first pressure sensor does not reach the threshold, the airbag will continue to inflate. As the contact surface of the airbag on the upper abutment continues to increase and exceeds the abutment force sensing surface of the first pressure sensor, the airbag will distribute the abutment force to other surfaces outside the abutment force sensing surface on the upper abutment, which to a certain extent leads to the subsequent abutment force data being inaccurate. If the abutment force data is not accurate enough, it is unreasonable to use the abutment force threshold to determine whether the airbag needs to be inflated. Therefore, it is necessary to use other methods to determine whether it is necessary to stop inflating the airbag. When at least one second pressure sensor set side by side with the first pressure sensor monitors the abutment force, it means that the contact surface between the airbag and the upper abutment is a certain size, which also indirectly indicates that the airbag has expanded to a certain extent in the horizontal direction. Therefore, it is possible to determine whether the expansion degree of the airbag has reached a certain level by designing the location where the second pressure sensor is installed, and to notify the airtightness detection device to stop inflating the airbag after the second pressure sensor detects the abutment force.

[0093] More preferably,

[0094] When there are multiple second pressure sensors, the multiple second pressure sensors are arranged at intervals in the horizontal direction, and any first and last second pressure sensors are spaced and adjacent to the first pressure sensor in the horizontal direction;

[0095] According to the distance between each second pressure sensor and the first pressure sensor, any one of the second pressure sensors is enabled; when the airbag abuts against the first pressure sensor, if the abutment force detected by the first pressure sensor does not reach the threshold value, the airbag continues to inflate and contact and abut with the enabled second pressure sensor. When the enabled second pressure sensor detects the abutment force, the filling of hot air into the airbag is stopped.

[0096] Among them, through the design of arranging multiple second pressure sensors in a horizontally spaced manner on the upper abutment member, the second pressure sensors can detect the abutment force after the airbag is inflated to different degrees. The design of the spaced arrangement can be regarded as a kind of scale, and the multiple second pressure sensors can effectively detect whether the contact surface area of ​​the airbag reaches a certain level. If any of the first and last second pressure sensors are spaced and adjacent to the first pressure sensor in the horizontal direction, it means that when observed in the horizontal direction, the multiple second pressure sensors can all be spaced and arranged on the right side of the first pressure sensor (the second pressure sensor at the head end is adjacent to the first pressure sensor), or all be spaced and arranged on the left side of the first pressure sensor (the second pressure sensor at the tail end is adjacent to the first pressure sensor). According to 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 second pressure sensor activated at this time is used to send a signal to the airtightness testing device and stop inflating the airbag after detecting the abutment force when the contact surface between the airbag to be tested and the upper abutment member exceeds the abutment force sensing surface of the first pressure sensor and the abutment force on the first pressure sensor has not reached the threshold, because at this time it can be considered that the airbag has expanded to the preset maximum extent.

[0097] More preferably,

[0098] When viewed in the horizontal direction, the upper abutment member is parallel to the lower abutment member. After hot air is filled into the airbag, the airbag begins to expand. When the airbag abuts the pressure sensor, the pressure sensor begins to monitor the abutment force F. The pressure sensor is preset with a pressure threshold F1. When the 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 being parallel to the lower abutment can evenly distribute the space between the two abutments, so that the airbag can evenly expand in the horizontal direction between the two abutments under the action of the positioning groove. When the airbag abuts 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 continues to increase, and the abutment force will continue to increase. When the abutment force reaches a certain level, it means that the tension of the airbag has reached its limit, and it is not appropriate to fill the airbag with gas.

[0102] More preferably, the temperature sensor is preset with a first temperature threshold W1 and a second temperature threshold W2, which satisfy the 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 recorded as T. After the airbag is filled with cold air of a preset volume V1 and a temperature T2, it is left to stand for a period of time, and the airbag expands and continues to cool down under the action of the cold air. The positions where the two abutment members place the airbag are provided with temperature sensors for monitoring the temperature of the airbag.

[0108] If the relationship is satisfied:

[0109] T=W2,

[0110] Then start timing the still time P, and determine whether the airbag is leaking by monitoring whether the air pressure in the airbag changes during the time P.

[0111] Among them, T1 is greater than or equal to W1, and W1 is between 30℃ and 65℃, which means that the temperature of the hot air injected into the airbag in step S20 is sufficient to simulate the use of the tent in various high temperature environments. Similarly, T2 is less than or equal to W2, and W2 is between -30℃ and 0℃, which means that the cold air injected into the airbag in step S50 is sufficient to simulate the use of the tent in various low temperature environments. The temperature sensor monitors the surface temperature of the outside of the airbag in real time. After the cold air is filled and left to stand for a period of time, the surface of the airbag begins to gradually cool down due to the effect of heat transfer. When the temperature of the airbag surface is monitored by the temperature sensor to reach the temperature W2, it means that the temperature state of the airbag at this time can simulate the scene of use in a low temperature environment. At this time, the ductility of the airbag material will decrease due to the decrease in temperature. On the basis of the decrease in ductility, when the airbag expands to a certain volume, the surface of the airbag may rupture due to insufficient ductility, thereby causing leakage. By detecting whether the air pressure in the airbag changes within time P or whether the change exceeds a certain threshold, the air tightness of the airbag (whether the leakage does not meet the product standard) can be well reflected.

[0112] Preferably, before the hot air is continuously charged into the airbag, the temperature sensor obtains the initial temperature T0 of the airbag, and in step S50,

[0113] After the hot air in the airbag is exhausted, the airbag is left to stand for a period of time, and the standing time period is recorded as S. The starting time of the standing time period S is recorded as s1, and the ending time is recorded as s2. At the starting time s1, the hot air in the airbag is completely extracted, and at the ending time s2, the relationship is satisfied:

[0114] T = T0;

[0115] 10℃≤T0≤20℃.

[0116] Among them, after the airbag discharges the hot air, the surface of the airbag will still retain the high temperature after the heat transfer. If cold air is directly filled in at this time, it will not only damage the material of the airbag due to the short-term temperature difference change, but also affect the results of the subsequent air tightness test, because the state of the airbag during the two inflations is inconsistent. Therefore, after the hot air is discharged, the airbag needs to be left still for a period of time S, and after the hot air in the airbag is extracted (monitored by the air pressure monitoring device), the starting time s1 begins, and when the temperature T obtained by the temperature sensor is within the room temperature range, the current time is used as the end time s2 to end the time period S.

[0117] According to the steps S10-S60, this specific implementation provides a specific example to simulate the air bag of the inflatable tent to perform air tightness testing at different temperatures:

[0118] Instance parameter settings:

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

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

[0121] The temperature T1 of the hot air was set to 80°C.

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

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

[0124] The static time period after the hot air is extracted from the airbag is recorded as S, and the starting time of the time period S is recorded as S1, and the ending time is recorded as S2.

[0125] The initial temperature T0 before airbag detection was set to 25°C.

[0126] Example process:

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

[0128] 2. Hot air at temperature T1 is filled into the airbag, and the airbag expands until it abuts against the upper abutment and then continues to expand in the horizontal direction.

[0129] Case 1: When the first pressure sensor of the pressure sensor detects that the abutment force F exerted by the airbag on the air pressure sensor reaches 200N, that is, F≥F1, the inflating of the airbag is stopped.

[0130] Case 2: A second pressure sensor is enabled. When the first pressure sensor of the pressure sensor detects that the abutment force F exerted by the airbag on the air pressure sensor has not reached 200N and continues to expand in the horizontal direction, inflating the airbag is stopped after the second pressure sensor detects the abutment force.

[0131] 3. Stop filling the airbag with 80°C hot air and let the airbag stand for a while. 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 starts to detect the leakage of hot air in the airbag within the time period T1.

[0132] 4. Expel the hot air in the airbag and leave the airbag for a period of time S. During the period of time S, the temperature of the airbag recovers from a higher temperature to the initial temperature T0.

[0133] 5. Fill the airbag with 300L of cold air at -50℃ and leave the airbag alone for a while. 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 equipment starts to detect the leakage of hot air in the airbag within the time period T2.

[0134] By this, by filling hot air and cold air into the airbag in turn, the airtightness detection device can detect the airtightness of the airbag at low temperature and high temperature respectively. After inflation, the airbag expands and abuts against the pressure sensor on the abutment, and the airbag expands in the horizontal direction, so that the pressure sensor on the abutment can effectively detect the abutment force applied by the airbag on the surface of the pressure sensor, and the airbag can gradually expand to a certain extent. By monitoring the abutment force of the airbag through the pressure sensor on the abutment and stopping filling the airbag with hot air when the abutment force reaches a threshold, the airbag can expand to a certain extent after the elasticity of the airbag material changes, so that the airtightness of the airbag material under elastic changes can be effectively detected. By filling a sufficient amount of cold air into the airbag and starting to detect the airtightness of the airbag when the temperature of the airbag reaches a threshold, the airtightness of the airbag material under ductility changes can be effectively detected.

[0135] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A tent air tightness detection method applicable to multiple scenarios, wherein the tent includes an air bag that serves as a supporting structure after being inflated, characterized in that: The method comprises the steps of: The airbag is placed between the two abutting members; wherein the airbag abuts against the two abutting members in the vertical direction after expansion and expands freely in the horizontal direction; The airtightness detector continuously fills the airbag with hot air of temperature T1, and the relationship is satisfied: T1 ≥ 30℃; The airbag expands and abuts against the two abutting members; wherein a pressure sensor for monitoring the abutting force is provided at the position where the two abutting members abut against the inflated airbag, and when the monitored abutting force reaches a threshold value, the hot air is stopped from being filled into the airbag; Let it stand for a while, and use an airtightness detector connected to the airbag to monitor whether the air pressure in the airbag changes during the standing time to determine whether the airbag is leaking; The hot air in the airbag is exhausted and filled with cold air of a preset volume V1 and a temperature T2, satisfying the relationship: T2≤0℃; The airbag is left to stand for a period of time, and the airbag expands and continues to cool down under the action of cold air, wherein temperature sensors for monitoring the temperature of the airbag are provided at the positions where the two abutment parts place the airbag. When the monitored temperature of the airbag reaches a threshold, the airbag is left to stand for a period of time, and whether the air pressure in the airbag changes during the period of continued standing is monitored to determine whether the airbag is leaking.

2. A tent air tightness detection method applicable to multiple scenarios according to claim 1, characterized in that: The two abutment members include: A lower abutment member for placing the airbag; The upper abutment member is directly opposite to the lower abutment member and is located on the side of the airbag away from the lower abutment member; wherein, The pressure sensor is arranged on a side of the upper abutment member facing the airbag; when the airbag is placed between the two abutments and has not yet been inflated with hot air, when viewed in the horizontal direction, there is no overlap between the projections of the pressure sensor and the airbag on the vertical plane; When hot air is filled into the airbag to expand the airbag, the airbag abuts against the side of the upper abutment member facing the airbag, and then contacts the pressure sensor and applies an abutment force.

3. The tent air tightness detection method applicable to multiple scenarios according to claim 2 is characterized in that: The temperature sensor is arranged 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 for expansion, when observed in the vertical direction, the projections of the pressure sensor and the temperature sensor on the horizontal plane are completely located within the projection of the airbag on the horizontal plane.

4. The tent air tightness detection method applicable to multiple scenarios according to claim 3 is characterized in that: The airbag is made of thermoplastic polyurethane rubber material, wherein the tent also includes fabric sewn to the airbag; When the airbag is placed between the two abutting members and is inflated with cold air, the temperature sensor is in contact with the airbag when viewed in the horizontal direction; When the airbag is placed between the two abutting pieces, the fabric sewn on the airbag is folded open to make the airbag directly contact with the temperature sensor on the lower abutting piece.

5. The tent air tightness detection method applicable to multiple scenarios according to claim 2 is characterized in that: The pressure sensor comprises: A first pressure sensor is located at a position where the two abutting members initially abut against the airbag after expansion; A positioning groove is also provided on the lower abutment member, and the temperature sensor is arranged in the positioning groove. When observed in the horizontal direction, the temperature sensor and the first pressure sensor are both located on the central symmetry line of the positioning groove; when the airbag is inflated, at least a portion of the airbag sinks into the positioning groove.

6. The tent air tightness detection method applicable to multiple scenarios according to claim 5 is characterized in that: The pressure sensor also includes: There is at least one second pressure sensor, and when viewed in the horizontal direction, the second pressure sensor is arranged side by side with the first pressure sensor; After the airbag abuts against the first pressure sensor, if the abutment force detected by the first pressure sensor does not reach a threshold value, the airbag continues to inflate and abuts against the second pressure sensor. When the second pressure sensor detects the abutment force, the filling of hot air into the airbag stops.

7. The tent air tightness detection method applicable to multiple scenarios according to claim 6 is 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 first and last second pressure sensors are spaced and adjacent to the first pressure sensor in the horizontal direction; According to the distance between each second pressure sensor and the first pressure sensor, any one of the second pressure sensors is enabled; when the airbag abuts against the first pressure sensor, if the abutment force detected by the first pressure sensor does not reach the threshold value, the airbag continues to inflate and contact and abut with the enabled second pressure sensor. When the enabled second pressure sensor detects the abutment force, the filling of hot air into the airbag is stopped.

8. The tent air tightness detection method applicable to multiple scenarios according to claim 2 is characterized in that: When viewed in the horizontal direction, the upper abutment member is parallel to the lower abutment member. After hot air is filled into the airbag, the airbag begins to expand. When the airbag abuts the pressure sensor, the pressure sensor begins to monitor the abutment force F. The pressure sensor is preset with a pressure threshold F1. When the relationship is satisfied: When F=F1, The airtightness detector stops filling the airbag with hot air.

9. The tent air tightness detection method applicable to multiple scenarios according to claim 2 is characterized in that: The temperature sensor is preset with a first temperature threshold W1 and a second temperature threshold W2, which satisfy the relationship: T1 ≥ W1; 65℃≥W1≥30℃； T2≤W2; -30℃≤W2≤0℃； The temperature of the airbag detected by the temperature sensor is recorded as T. After the airbag is filled with cold air of a preset volume V1 and a temperature T2, it is left to stand for a period of time, and the airbag expands and continues to cool down under the action of the cold air. The positions where the two abutment members place the airbag are provided with temperature sensors for monitoring the temperature of the airbag. If the relationship is satisfied: T=W2, Then start timing the still time P, and determine whether the airbag is leaking by monitoring whether the air pressure in the airbag changes during the time P.

10. A tent air tightness detection method applicable to multiple scenarios according to claim 9, characterized in that: Before the hot air is continuously charged into the airbag, the temperature sensor obtains the initial temperature T0 of the airbag. In the step "exhausting the hot air in the airbag and charging the cold air with a preset volume V1 and a temperature T2, satisfying the relationship: T2≤0°C", After the hot air in the airbag is exhausted, the airbag is left to stand for a period of time, and the standing time period is recorded as S. The starting time of the standing time period S is recorded as s1, and the ending time is recorded as s2. At the starting time s1, the hot air in the airbag is completely extracted, and at the ending time s2, the relationship is satisfied: T = T0; 10℃≤T0≤20℃。

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