Method for testing natural aging of aerostat capsule material

Abstract

The embodiment of the invention provides a method for testing natural aging of an aerostat capsule material, and belongs to the technical field of aerostats. The test method comprises the following steps: acquiring a to-be-aged test raw material; taking a part of the to-be-aged test raw material as a contrast piece, and preprocessing the rest part to obtain a plurality of test pieces; folding the edges of the plurality of test pieces and carrying out heat sealing; connecting the plurality of test pieces end to end to form a to-be-aged test piece; fixing the test piece to be aged on the inner surface of the aerostat product; sampling the to-be-aged test piece after external field use; and comparing and analyzing the to-be-aged test piece and the contrast piece to evaluate the performance of the to-be-aged test piece. The method can measure the actual aging conditions of the inner surfaces of the auxiliary airbag material and the airbag body material in long-term external field use, has the function of improving the reliability of the aerostat, and effectively reduces the quality risk after the long-term external field use of the aerostat.

Description

Technical Field

[0001] The present invention relates to the technical field of aerostats, and in particular to a method for testing the natural aging of aerostat bladder materials. Background Art

[0002] The bladder material of an aerostat is a multi-layered polymer composite material with high strength, tear resistance, high barrier properties, and aging resistance. As the core structure of an aerostat, the bladder material has a direct impact on its performance and significantly affects its quality and service life. Therefore, bladder material is a key technical issue in aerostat development.

[0003] Aerostats operate in a harsh environment. After long-term field use, the performance indicators of the envelope material will significantly change, affecting the product's service life and safety. Research on the impact of aging factors on envelope materials is of great significance to the safety of aerostats. While there have been reports of relevant aging test equipment or accelerated aging devices, most of them focus on the performance degradation of the outer surface of the aerostat envelope material after long-term irradiation. There is no research on the performance changes of the auxiliary airbag material inside the aerostat or the inner surface of the envelope material after aging. Furthermore, existing accelerated aging methods cannot truly reflect the actual aging of envelope materials during long-term field use, and the corresponding relationship between accelerated aging and natural aging is still under investigation. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a method for testing the natural aging of an aerostat's bladder material, which solves the problem that the actual aging of the auxiliary airbag material and the inner surface of the bladder material cannot be measured during long-term field use, thereby leading to poor reliability of the aerostat.

[0005] To achieve the above objectives, an embodiment of the present invention provides a method for testing the natural aging of an aerostat bladder material, the method comprising: Obtain raw materials to be tested for aging; Taking a portion of the raw material to be tested for aging as a control piece, and pre-treating the remaining portion to obtain a plurality of test pieces; folding and heat-sealing the edges of the plurality of test pieces; Connecting the plurality of test pieces end to end to form a test piece to be aged; Fixing the aging test piece to the inner surface of the aerostat product; After field use, sampling is performed on the test piece to be aged; The aging test piece and the control piece are compared and analyzed to evaluate the performance of the aging test piece.

[0006] Optionally, the raw materials to be subjected to the aging test include a secondary airbag, a main airbag, and heat-sealed fabrics matching the secondary airbag or the main airbag.

[0007] Optionally, pre-processing the raw material to be tested for aging to obtain a plurality of test pieces includes: Performing numerical control cutting on the auxiliary airbag to obtain auxiliary airbag small pieces; Grouping the cut auxiliary airbag pieces into groups of two to form an auxiliary airbag group; The heat-sealed cloth is used to cover the seams of the two auxiliary airbag blocks of the auxiliary airbag group and heat-sealed to form a test piece.

[0008] Optionally, the number of auxiliary airbag groups in a single test piece is 5 to 15.

[0009] Optionally, the heat sealing parameters of the heat seal are the same as the processing parameters of the aerostat product; The heat-sealed web connection form is the same as the web connection form of the aerostat product.

[0010] Optionally, the width of the folded edge of the test piece is 20-100 mm.

[0011] Optionally, connecting the multiple test pieces end to end to form the test piece to be aged includes connecting the test pieces using one or more of Velcro, binding ropes, and glue.

[0012] Optionally, sampling is performed on the test piece to be aged after field use, including setting a sampling time interval of 3 to 24 months.

[0013] Optionally, performing a comparative analysis on the test piece to be aged and the control piece to evaluate the performance of the test piece to be aged, including: obtaining a first performance indicator of the reference part; Obtaining a second performance indicator of the test piece to be aged; Determining whether the second performance indicator is less than the first performance indicator; When it is determined that the second performance index is less than the first performance index, it is determined that the to-be-aged test piece has been aged.

[0014] Optionally, the first performance index and the second performance index include shear strength, peel strength and helium permeability.

[0015] Through the above technical solution, the present invention provides a method for testing the natural aging of aerostat envelope materials. The present invention subjects the test piece to be aged to the same conditions as the aerostat product. By comparing the performance indicators of the test piece to be aged with the control piece, the actual aging of the auxiliary airbag material and the inner surface of the envelope material over long-term field use can be measured. This allows for the performance evaluation and prediction of the envelope material itself and the connection parts of the aerostat product. This allows for the pre-planning of the production and replacement of new products for near-end-of-life aerostats, ensuring uninterrupted field mission execution. The present invention improves the reliability of aerostats and effectively reduces the quality risks associated with long-term field use.

[0016] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings: Figure 1 is a flow chart of a testing method according to one embodiment of the present invention; Figure 2 is a schematic diagram of a test piece edge folded and heat-sealed according to one embodiment of the present invention; Figure 3 is a flow chart of preprocessing to obtain multiple test pieces according to one embodiment of the present invention; Figure 4 is a schematic diagram of a connection method between test pieces according to one embodiment of the present invention; Figure 5 is a schematic diagram of connecting a test piece to be aged and an aerostat product according to one embodiment of the present invention; Figure 6 FIG. 4 is a flow chart for evaluating the performance of a test piece to be aged according to one embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not used to limit the embodiment of the present invention.

[0019] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of laws and regulations. In the embodiments of this application, certain software, components, models, and other existing solutions in the industry may be mentioned. These should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use such solutions.

[0020] Figure 1 FIG. 1 is a flow chart of a testing method according to an embodiment of the present invention, in which the testing method includes: In step S1, raw materials to be subjected to aging tests are obtained, wherein the raw materials to be subjected to aging tests are aerostat capsule materials.

[0021] In step S2, a portion of the raw material to be tested for aging is taken as a control piece, and the remaining portion is pretreated to obtain a plurality of test pieces.

[0022] In step S3, the edges of the multiple test pieces are folded and heat-sealed. In order to simulate the overall closed form of the aerostat product and avoid the edges of the test pieces being directly exposed to the dark and humid environment inside the aerostat product, the edges of the test pieces are folded and heat-sealed. Specifically, Figure 2 shown.

[0023] In step S4 , multiple test pieces are connected end to end to form a test piece to be aged.

[0024] In step S5, the aging test piece is affixed to the inner surface of the aerostat. To measure the actual aging of the inner surface of the capsule material during long-term field use, the aging test piece is obtained and then affixed to the inner surface of the aerostat. Testing is conducted directly within the aerostat's operating environment. Changes in the performance of the aging test piece can accurately reflect changes in the capsule material's performance. Adhesive affixation can also be used to avoid damage to the aerostat, making the process simple and convenient.

[0025] In step S6, samples are taken from the test piece to be aged after field use.

[0026] In step S7 , the aging test piece is compared with the control piece to evaluate the performance of the aging test piece.

[0027] Compared to existing technologies, the aging test piece in this invention undergoes simultaneous aging in the same environment as the aerostat product. This testing method is simple to operate and does not affect the normal operation of the aerostat. By comparing the performance indicators of the aging test piece with the control piece, the actual aging of the auxiliary airbag material and the inner surface of the airbag material can be measured after long-term field use. This simple testing method can evaluate and predict the performance of the airbag material itself and the connection parts of the aerostat product. For aerostat products nearing the end of their service life, the production and replacement of new products can be planned in advance to ensure uninterrupted field mission execution. This invention improves the reliability of the aerostat and effectively reduces the quality risks of the aerostat after long-term field use.

[0028] In order to explore the performance of the auxiliary airbag material and the inner surface of the airbag material inside the aerostat after aging, in this embodiment, the raw materials to be aged may include the auxiliary airbag and the main airbag and heat-sealed cloth matched with the auxiliary airbag or the main airbag.

[0029] In this embodiment, the method for pre-processing to obtain multiple test pieces can be various forms known to those skilled in the art. In one example of the present invention, the method for pre-processing the remaining parts to obtain multiple test pieces can be as follows: Figure 3 In the steps shown. Figure 3 In the method of pre-processing the remaining part to obtain multiple test pieces, the method may include the following steps: In step S21 , the auxiliary airbag is numerically cut to obtain small pieces of the auxiliary airbag.

[0030] In step S22 , the cut auxiliary airbag pieces are grouped in pairs to form an auxiliary airbag group.

[0031] In step S23, heat-sealed fabric is applied to the seam between the two auxiliary airbag segments of the auxiliary airbag subgroup and heat-sealed to form a test piece. Similarly, the pre-processing method for obtaining multiple test pieces may also include CNC-cutting the main airbag to obtain main airbag segments, grouping the cut main airbag segments in pairs to form a main airbag subgroup, and applying heat-sealed fabric to the seam between the two main airbag segments of the main airbag subgroup and heat-sealing to form a test piece.

[0032] Furthermore, in this embodiment, the number of auxiliary airbag subgroups in a single test piece can be any number known to those skilled in the art. In one example of the present invention, the number of auxiliary airbag subgroups can be 5 to 15. Similarly, the number of main airbag subgroups can be 5 to 15.

[0033] In this embodiment, the heat-sealing parameters can be various, as known to those skilled in the art. In one example of the present invention, to ensure that the initial performance of the test piece is consistent with that of a commercially available aerostat, the heat-sealing parameters are identical to the manufacturing parameters of the aerostat. Furthermore, the sheet-to-sheet connection method for the heat-sealing is identical to that of the aerostat, either a butt-joint or lap-joint. Furthermore, the heat-sealing parameters for the seam between the auxiliary airbag and main airbag sections are identical to the manufacturing parameters of the aerostat.

[0034] In this embodiment, the width of the folded edge of the test piece can be various widths known to those skilled in the art. In one example of the present invention, in order to ensure a sealing effect, the width of the folded edge of the test piece is 20-100 mm.

[0035] After heat sealing the test pieces, multiple test pieces need to be connected. For the connection method, such as Figure 4 As shown, the test pieces can be connected using one or more of Velcro, lashing rope, and adhesive. For connecting the test pieces using Velcro, the velvet surface of the Velcro is sewn to the inner surface of one end of test piece 1, and the matching hook surface of the Velcro is sewn to the outer surfaces of both ends of test piece 2. The velvet surface of the Velcro is sewn to the inner surfaces of both ends of test piece 3, and the matching hook surface of the Velcro is sewn to the outer surfaces of both ends of test piece 4. And so on, the connection between the test pieces is achieved through the mutual connection between the velvet surface and the hook surface. For connecting the test pieces using lashing rope, the first and last test pieces are eyeleted on one side, and the remaining test pieces are eyeleted on both sides. The lashing rope is then passed through and finally tied to secure the connection. The inner surfaces of the test pieces are facing outward when connected. For connecting the test pieces using adhesive, the small test pieces are connected through the connecting fabric piece, and the inner surfaces of the test pieces are facing outward when connected. These connection methods are all easy to operate and will not cause damage to the subsequent aging test pieces after sampling. Figure 5 This diagram illustrates the connection between an aging test piece and an aerostat product according to one embodiment of the present invention. The large, connected aging test piece is bonded to the interior of the aerostat product via a connecting fabric sheet. The piece is then inflated, deployed, and subjected to long-term field use along with the aerostat product. The shape of the aging test piece can be any of a variety known to those skilled in the art. In a preferred embodiment, the aging test piece can be rectangular.

[0036] Considering the need to evaluate the performance changes of the bladder material over long-term use to reflect different stages of aging, in this embodiment, the sampling interval can be set at various intervals known to those skilled in the art. In one example, the sampling interval is set between 3 and 24 months. Sampling and testing the aging test piece at regular intervals is simple to perform, can reflect the actual performance changes of the material, and does not affect the normal operation of the aerostat.

[0037] In this embodiment, the method for evaluating the performance of the test piece to be aged can be various forms known to those skilled in the art. In one example of the present invention, the method for evaluating the performance of the test piece to be aged can include: Figure 6 The steps shown in Figure 6 In the process of evaluating the performance of the test piece to be aged, the following steps may be included: In step S71 , a first performance indicator of the reference part is obtained.

[0038] In step S72, a second performance index of the test piece to be aged is obtained.

[0039] In step S73, it is determined whether the second performance index is less than the first performance index. If the second performance index is less than the first performance index, step S74 is executed; otherwise, step S75 is executed.

[0040] In step S74 , it is determined that the to-be-aged test piece has aged.

[0041] In step S75 , it is determined that the to-be-aged test piece has not been aged.

[0042] In this embodiment, the specific meanings of the first and second performance indicators can be various known to those skilled in the art. In one example of the present invention, the first and second performance indicators can include shear strength, peel strength, and helium permeability. At regular intervals, a small piece of the test piece is removed for testing and compared with a control piece. The performance of the aerostat product bladder material is evaluated by measuring the rate of decrease in shear strength, peel strength, and helium permeability.

[0043] Through the above technical solution, the present invention provides a method for testing the natural aging of aerostat envelope materials. The present invention subjects the test piece to be aged to the same conditions as the aerostat product. By comparing the performance indicators of the test piece to be aged with the control piece, the actual aging of the auxiliary airbag material and the inner surface of the envelope material over long-term field use can be measured. This allows for the performance evaluation and prediction of the envelope material itself and the connection parts of the aerostat product. This allows for the pre-planning of the production and replacement of new products for near-end-of-life aerostats, ensuring uninterrupted field mission execution. The present invention improves the reliability of aerostats and effectively reduces the quality risks associated with long-term field use.

[0044] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0045] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for testing the natural aging of aerostat bladder materials, characterized in that: The test method includes: Obtain raw materials to be tested for aging; Taking a portion of the raw material to be tested for aging as a control piece, and pre-treating the remaining portion to obtain a plurality of test pieces; folding and heat-sealing the edges of the plurality of test pieces; Connecting the plurality of test pieces end to end to form a test piece to be aged; Fixing the aging test piece to the inner surface of the aerostat product; After field use, sampling is performed on the test piece to be aged; The aging test piece and the control piece are compared and analyzed to evaluate the performance of the aging test piece.

2. The testing method according to claim 1, wherein: The raw materials to be tested for aging include a secondary airbag, a main airbag, and heat-sealed fabrics matching the secondary airbag or the main airbag.

3. The testing method according to claim 2, wherein: The raw materials to be tested for aging are pre-treated to obtain a plurality of test pieces, including: Performing numerical control cutting on the auxiliary airbag to obtain auxiliary airbag small pieces; Grouping the cut auxiliary airbag pieces into groups of two to form an auxiliary airbag group; The heat-sealed cloth is used to cover the seams of the two auxiliary airbag blocks of the auxiliary airbag group and heat-sealed to form a test piece.

4. The testing method according to claim 3, wherein: The number of auxiliary airbag groups in a single test piece is 5 to 15.

5. The testing method according to claim 1, wherein: The heat sealing parameters of the heat seal are the same as the processing parameters of the aerostat product; The heat-sealed web connection form is the same as the web connection form of the aerostat product.

6. The testing method according to claim 1, wherein: The width of the folded edge of the test piece is 20-100 mm.

7. The testing method according to claim 1, wherein: Connecting the multiple test pieces end to end to form the test piece to be aged includes connecting the test pieces using one or more of Velcro, binding ropes, and adhesives.

8. The testing method according to claim 1, wherein: After field use, the aging test piece is sampled, including setting a sampling time interval of 3 to 24 months.

9. The testing method according to claim 1, wherein: Comparative analysis of the aging test piece and the control piece is performed to evaluate the performance of the aging test piece, including: obtaining a first performance indicator of the reference part; Obtaining a second performance indicator of the test piece to be aged; Determining whether the second performance indicator is less than the first performance indicator; When it is determined that the second performance index is less than the first performance index, it is determined that the to-be-aged test piece has been aged.

10. The testing method according to claim 9, characterized in that: The first performance index and the second performance index include shear strength, peel strength and helium permeability.

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