CN117890222A - Aerostat skin material state monitoring system and method - Google Patents
Aerostat skin material state monitoring system and method Download PDFInfo
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- CN117890222A CN117890222A CN202311866198.7A CN202311866198A CN117890222A CN 117890222 A CN117890222 A CN 117890222A CN 202311866198 A CN202311866198 A CN 202311866198A CN 117890222 A CN117890222 A CN 117890222A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention belongs to the technical field of aerostat application, and discloses an aerostat skin material state monitoring system and method. The system comprises: the device comprises a test body, an inflation and deflation unit, a fixed frame, a test body base and a pressure adjusting module; the test body base is fixed on the ground and used for supporting the test body; the fixing frame is of a frame type structure and is used for fixing the test body from the periphery, and the base of the test body is positioned in the center of the inside of the fixing frame; the test body is formed by splicing and sewing skin material cut pieces which are the same as the aerostat to be monitored in material; the inflation and deflation unit is arranged on the test body and is used for inflating and deflating the test body; the pressure regulating module is connected with the air charging and discharging unit and used for controlling the air charging and discharging unit. The method comprises the following steps: step one: simulating the aerostat state of the test body; step two: cutting a test sample from a test body; step three: repairing the test body after the test sample is cut, and continuing to simulate the aerostat state of the repaired test body; step four: the test sample is tested.
Description
Technical Field
The invention belongs to the technical field of aerostat simulation monitoring, and discloses a system and a method for monitoring the state of aerostat skin material.
Background
The strength of the performance of the skin material directly influences the use safety of the aerostat, and in the use process of the aerostat, the performance of the skin material continuously and slowly changes due to the influence of natural environment and skin tension due to the fact that the aerostat is exposed to the natural environment throughout the year, so that the state of the skin material needs to be effectively monitored and predicted.
The skin material monitoring method commonly used at present is divided into a random test method and an environment box acceleration test method. The random test method is a method for monitoring the material state by fixing a skin material sample to an aerostat itself by means of pasting or rope fixing and the like and periodically taking the sample for testing. According to the test method, the aerostat is fixed together, the condition of the test piece is consistent with that of the aerostat, but skin tension exists on the surface of a skin material of the aerostat relative to a target aerostat, the interior of a random sample is pressureless, the stress state of the aerostat cannot be simulated, and the difference between the actual skin state of the aerostat and the test piece is large. Over time, the aerostat deepens under the influence of surface tension creep, and the difference increases gradually. The environment box acceleration test method is to simulate natural environment through environment test to perform aging verification on materials, and although the method can perform acceleration test, the environment box acceleration test method has a certain difference between the environment state and the natural environment, does not have complete simulation, and does not have the capability of simulating aerostat tension.
If the actual state of the aerostat skin material needs to be confirmed, the current method is to sample the aerostat through an opening, the implementation period of the method is long, and the integrity of the aerostat and even the potential safety hazard can be damaged.
Disclosure of Invention
The invention aims to provide an aerostat skin material state monitoring system and method, which can improve the use safety of aerostat products and predict the performance change trend of skin materials.
In order to solve the technical problems, the invention provides the following technical scheme:
an aerostat skin material condition monitoring system comprising: the device comprises a test body, an inflation and deflation unit, a fixed frame, a test body base and a pressure adjusting module;
the test body base is fixed on the ground and used for supporting the test body;
the fixing frame is of a frame type structure and is used for fixing the test body from the periphery, and the base of the test body is positioned in the center of the inside of the fixing frame;
the test body is formed by splicing skin material cut pieces which are the same as the aerostat to be monitored;
the inflation and deflation unit is arranged on the test body and is used for inflating and deflating the test body;
the pressure regulating module is connected with the air charging and discharging unit and used for controlling the air charging and discharging unit.
Further, the appearance of the test body is in a sphere, an ellipsoid or a water drop shape, and is the same as that of the aerostat to be monitored, and the test body is formed by splicing the skin material cut pieces in a heat sealing, gluing and sewing mode.
Further, the inflation/deflation unit includes: an inflation valve, a deflation valve and a pressure measurement valve.
Further, the upper end of the test body base is of a concave arc-shaped structure and is used for being tightly attached to the outer shape of the test body;
the inner surface of the circular arc structure is adhered with a flexible attaching layer to avoid scratching the test body.
An aerostat skin material state monitoring method, the method being implemented by the system, the method comprising the steps of:
step one: simulating the aerostat state of the test body;
step two: cutting a test sample from a test body;
step three: repairing the test body after the test sample is cut, and continuing to simulate the aerostat state of the repaired test body;
step four: the test sample is tested.
Further, in the first step, performing aerostat status simulation on the test body includes: environmental simulation, inflation and deflation working state simulation and surface tension simulation;
the environment simulation is as follows: placing the aerostat skin material state monitoring system at the same position of the target aerostat, so that the test body and the target aerostat experience the same test environment; carrying out appearance, mechanical property and process performance tests on the test body, and analyzing ageing influence of the external environment on the skin material of the test body;
the inflation and deflation working states are simulated as follows: the pressure regulating module is used for controlling the inflation and deflation unit to periodically inflate and deflate the test body, so that the skin material of the test body periodically expands and contracts;
the surface tension simulation was: the working pressure of the test body was determined according to the following formula:
wherein: delta is the pressure coefficient, P s For working pressure of test body, P f For the target aerostat working pressure, R s For the radius of the test body, R f Is the target aerostat radius;
and taking the value of the pressure coefficient delta as 1, enabling the surface tension of the skin material of the test body to be consistent with the surface tension of the skin material of the target aerostat, and truly simulating the surface tension state of the skin of the target aerostat by 1:1.
Further, in the second step, the step of cutting the test sample is: and completely evacuating the gas in the test body, and cutting the uniform, continuous and regular skin material of the test body at the corresponding part of the test body according to the test requirement to serve as a test sample.
In the third step, during repairing, repairing materials with the same appearance, material and size are manufactured according to the cut test sample, and the repairing materials and the test body are assembled and molded in a heat sealing or gluing mode to complete sealing of the test body.
Further, the method further comprises: in the surface tension simulation, the pressure coefficient delta is increased to more than 1, and the accelerated creep is carried out so as to predict the creep change trend of the target aerostat skin material in advance.
The beneficial effects of this application lie in:
1) Real simulation of the state of a target aerostat
The invention can realize 100% real simulation of the working environment, surface tension and working state of the target aerostat, and provides real and effective reference basis for monitoring the skin material state of the aerostat.
2) Realizing accelerated verification of skin material
The pressure regulating module can control the working pressure in the test body, so that the surface tension states of different pressure values are realized, the verification effect of the accelerated creep of the material is achieved, and the effect of predicting the change trend of the skin material is achieved.
3) Has no influence on the safety of aerostats
The method does not carry out any treatment on the surface of the aerostat, and does not influence the integrity and the use safety of the target aerostat.
Drawings
In order to more clearly illustrate the technical solutions and advantages of embodiments or prior art of the present application, the following description will briefly explain the drawings used in the description of the embodiments or prior art.
FIG. 1 is a schematic diagram of an aerostat skin material condition monitoring system;
FIG. 2 is a top view of an aerostat skin material condition monitoring system;
1. a test body; 2. an inflation valve; 3. a pressure measuring valve; 4. a bleed valve; 5. a fixed frame; 6. a test body base; 7. and a pressure regulating module.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.
Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
An aerostat skin material condition monitoring system comprising:
1) Test body
(1) Cutting the skin material which is the same as the target aerostat according to the appearance of the test body to manufacture a test body cut piece;
(2) the cut pieces are manufactured into required test bodies by using the technological methods of heat sealing, gluing, sewing and the like.
Note 1: the shape of the test body can be made into a sphere, an elliptic sphere, a water drop-shaped structure and the like according to the requirement, and the test body is in the shape of a sphere in the schematic diagram.
And (2) injection: the size of the test body is processed according to the requirements of sampling period, placement time, working environment and the like, and the diameter of the test body in the schematic diagram is 4m.
2) The device such as inflation valve, pressure measurement valve, bleed valve is mainly used to aerify or to deflate the test body, can self-control or purchase the finished product as required.
3) Fixing frame
(1) Determining the outline dimension of the fixed frame according to the outline of the test body;
(2) manufacturing a fixing frame fixing rod, a transverse supporting rod, an inclined supporting rod, a baseboard and other structures according to the outline dimension;
(3) and the fixing rod, the cross brace, the inclined brace, the skirting board and other structures are assembled and formed by welding or screwing.
4) The test body base is mainly used for supporting the test body, avoiding friction with the ground and the like, can be tightly attached to the test body, and the attaching surface needs to be wrapped by flexible materials so as to avoid damaging the test body.
5) The pressure regulating module is mainly used for regulating pressure and comprises components such as an inflator pump, a pressure sensor, a PLC controller, a control valve and the like.
Note that: the pressure regulating module is a mature product and can be processed by referring to the prior patent.
6) And assembling the inflation valve, the pressure measuring valve, the deflation valve and the test body.
7) The fixing frame is fixed at a specified position by an expansion bolt.
8) The test body base is fixed in the center area of the fixed frame through expansion bolts.
9) And placing the test body in the fixing frame and on the test body base.
10 The inflation valve, the pressure measuring valve and the deflation valve are connected with the pressure adjusting module through pressure measuring pipes, wires and the like.
11 Electrifying, inflating the test body to a set pressure, and adjusting the state of the test body until the test body is completely fixed.
12 The pressure regulating system is adjusted to an automatic state.
An aerostat skin material state monitoring method comprises the following steps:
1) State simulation for aerostat
And (3) environment simulation: after monitoring starts, the monitoring device and the target aerostat are placed at the same position, and the test body and the target aerostat experience the same external environment. The aging influence of the environment on the skin material of the test body and the skin material of the target aerostat is completely consistent, and the aging influence comprises altitude, illumination, temperature, salt fog, humidity, oxidization, haze, dust, wind sand, rain snow and the like. By carrying out various tests on appearance (color, morphological characteristics, pulverization and the like), mechanical properties (tensile strength, tearing strength, helium permeability, elongation at break and the like), physicochemical properties (infrared, molecular weight and the like), technological properties (heat sealing, gluing and the like) and the like, the aging influence of the external environment on the skin material of the test body is analyzed, the aging state of the target aerostat skin material at the same position can be reflected, and the purpose of environmental simulation of the target aerostat skin material is achieved.
And (3) simulating the inflation and deflation working states: the aerostat product adjusts the pressure of the air bag through the auxiliary air bag to maintain the rigidity and the appearance of the air bag, and the pressure inside the air bag is in a periodical rising or falling state, and the skin material can be continuously expanded and contracted in the process. The pressure regulating module is used for periodically filling gas into the test body and exhausting gas, the pressure in the test body is continuously increased and reduced, the test body skin material is continuously expanded and contracted, and the purpose of simulating the working state of the periodic expansion and contraction of the target aerostat skin material is achieved.
Surface tension simulation: the aerostat maintains the appearance and rigidity by means of the pressure of the air bag, and the skin can generate surface tension under the action of the pressure of the air bag. The surface tension influences the aerostat skin splice and can generate creep, the body can expand, the use safety of the sphere is influenced, and the skin surface tension needs to be monitored. And setting a target working pressure control range in the test body through the pressure adjusting module, so that the surface tension of the skin of the test body is consistent with the surface tension of the target aerostat. According to the size difference of the target aerostat and the test body, the target working pressure range of the test body is converted, if the target aerostat and the test body are both spherical, the working pressure of the corresponding test body is as follows:
wherein: delta is the pressure coefficient;
P s working pressure for the test body;
P f working pressure for a target aerostat;
R s is the radius of the test body;
R f is the target aerostat radius.
When the pressure coefficient delta is 1, the surface tension of the skin material of the test body is consistent with the surface tension of the skin material of the target aerostat, and the surface tension state of the skin of the target aerostat can be truly simulated in a 1:1 mode.
2) Sampling and testing
The test body is consistent with the state of the target aerostat, and the purpose of monitoring the state of the target aerostat skin material is achieved by periodically sampling and testing the test body skin material. The sampling and testing method is as follows:
(1) the test body is deflated until the internal gas is completely emptied, so that the cutting and sampling are facilitated.
(2) And selecting a corresponding part on the surface of the test body according to the test requirement, and cutting the test sample. If the illumination intensity test requirement is developed, the parts with obvious difference of illumination at the top, the middle and the bottom of the test body can be selected for sampling; if the skin material body test is carried out, the unprocessed area on the test body cut piece can be selected for sampling; if the heat sealing performance test of the skin material is carried out, the joint of the test body panels can be selected for sampling and the like. The sampling process is generally carried out according to the steps of drawing lines of the sampling part (suggesting the sampling appearance to be in a regular shape so as to be convenient for repairing) and cutting along the drawn lines. The sampling should generally be performed on a uniform, continuous and regular basis to facilitate repair after sampling. Sampling is typically performed using sharp knives or scissors, such as scissors, to ensure flatness of the cut area.
(3) After the sampling is finished, a repair material with the same material and size as the cut sample is manufactured according to the external dimension of the sampling, and the repair material and the test body are assembled and molded by adopting a heat sealing or gluing process method generally, so that the sealing of the test body is finished, the airtight sealing effect and the integral consistency of the test body in the subsequent use process are ensured, the integral consistency of the repaired state is ensured to be basically consistent with that before the sampling, and the effect of continuously monitoring the target aerostat is achieved.
(4) The test body is re-inflated and mounted in place for later testing.
(5) Sample testing is performed according to corresponding standards (the testing standards generally select industry standards, national standards or national army standards related to flexible composite materials), and test items include, but are not limited to, aspects such as appearance (color, morphological characteristics, pulverization and the like), mechanical properties (tensile strength, tear strength, helium permeability, elongation at break and the like), physicochemical properties (infrared rays, molecular weight and the like), technological properties (heat sealing, cementing and the like).
(6) According to the test result of the sample, the change condition of the skin material of the target aerostat is analyzed, including the surface pulverization condition, the residual strength, the helium leakage rate, the processing manufacturability and the like of the skin material, whether the target aerostat is continuously used, maintained or has a life, and the effect of target monitoring is achieved.
3) Accelerating creep
The pressure coefficient delta is increased to be more than 1, the pressure range of the pressure regulating module can be correspondingly increased, the internal pressure of the test body is increased, the surface tension of the test body is increased, the effect of accelerating creep of the test body is achieved, the creep change trend of the target aerostat skin material is predicted in advance, and the purposes of monitoring and prediction are achieved.
Example 1
The invention is applied to monitoring the state of the S Z300 sightseeing captive balloon of the vitex aeronaut.
Structure of the
1) The test body of the monitoring system (hereinafter referred to as the system) adopts a structure of cutting pieces with diameters of 4m and 24. The skin material is the same as the material of the SZ300 sightseeing tethered balloon bag, and is URETEK-5972 material. And splicing and heat-sealing the 24 cut pieces by adopting a heat-sealing processing technology.
2) The inflation valve, the pressure measuring valve and the deflation valve are commercially available finished products.
3) The appearance of the fixing frame is regular hexagon, the side length is 2m, the height is 2.4m, the material is 45# steel, and the surface is painted and is rust-proof.
4) The base of the test body is of a circular rubber structure, the outer diameter is 1.5m, the inner diameter is 0.9m, and the height is 0.4m.
5) The pressure regulating module is a custom product.
Mounting embodiment
The system is 200m away from the Jingmen aeronautical SZ300 sightseeing tethered balloon, no shielding object exists around the installation, the ground is a cement hardening area, and the installation time is consistent with the erection time of the Jingmen aeronautical SZ300 sightseeing tethered balloon. The system installation process is as follows:
1) The fixing frame is fixed to the ground using expansion bolts.
2) The test body base was positioned in the center area of the fixed frame using expansion bolts.
3) The test body is placed on the upper part of the test body base.
4) The pressure regulating module is fixed on the ground by using an expansion bolt, and is connected with the test body by an inflation pipeline.
5) And electrifying, namely inflating the test body to be full through a pressure regulating module, and converting the dimensions of the SZ300 sightseeing tethered balloon and the test body into the dimensions, wherein when the pressure coefficient delta is 1, the working pressure range in the test body is (1500-2500) Pa.
6) The test body is connected with the fixing buckle through the rope, so that the test body is prevented from swinging.
7) And setting the control mode to be automatic, and starting to monitor the state of the sightseeing tethered balloon by the S Z300 of the Jinmen lover.
Test embodiment
Taking the warp-wise body tensile strength test process as an example, the implementation steps are as follows:
1. the test body is deflated until the internal gas is completely emptied, so that the cutting and sampling are facilitated.
2. According to the tensile test requirement of the warp body, 5 test pieces with the size of 152 multiplied by 25 mm are required to be manufactured, and the total sampling size is 200 multiplied by 150 mm.
3. Position lines of (200X 150) mm were drawn on the test panels, with the 200mm direction being the warp direction.
4. The sample was cut with scissors.
5. A piece of URETEK-5972 material with the size of (200X 150) mm is prepared for repairing the sampling part, and the repairing material is thermally combined with the test body by using a fusion heat sealing process method.
6. The test body is re-inflated and mounted in place for later testing.
7. Tensile strength tests are carried out according to annex B3.2 of GJB 8177-2015 general Specification for balloon-borne radar tethered balloon platform, and the test results are 59.5N/mm, 62.7N/mm, 63.1N/mm, 60.4N/mm and 65.8N/mm respectively.
8. The test result shows that the residual strength of the URETEK-5972 material meets the criterion index of not less than 36N/mm and can be used continuously.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (9)
1. An aerostat skin material state monitoring system, which is characterized in that: the system comprises: the device comprises a test body, an inflation and deflation unit, a fixed frame, a test body base and a pressure adjusting module;
the test body base is fixed on the ground and used for supporting the test body;
the fixing frame is of a frame type structure and is used for fixing the test body from the periphery, and the base of the test body is positioned in the center of the inside of the fixing frame;
the test body is formed by splicing skin material cut pieces which are the same as the aerostat to be monitored;
the inflation and deflation unit is arranged on the test body and is used for inflating and deflating the test body;
the pressure regulating module is connected with the air charging and discharging unit and used for controlling the air charging and discharging unit.
2. The system according to claim 1, wherein: the appearance of the test body is in a sphere, an ellipsoid or a water drop shape, is the same as that of an aerostat to be monitored, and is formed by splicing skin material cut pieces in a heat sealing, gluing and stitching mode.
3. The system according to claim 2, wherein: the inflation and deflation unit comprises: an inflation valve, a deflation valve and a pressure measurement valve.
4. A system according to claim 3, characterized in that: the upper end of the test body base is of a concave arc-shaped structure and is used for being tightly attached to the outer shape of the test body;
the inner surface of the circular arc structure is adhered with a flexible attaching layer to avoid scratching the test body.
5. A method of monitoring the condition of an aerostat skin material, the method being implemented by the system of any one of claims 1 to 4, wherein: the method comprises the following steps:
step one: simulating the aerostat state of the test body;
step two: cutting a test sample from a test body;
step three: repairing the test body after the test sample is cut, and continuing to simulate the aerostat state of the repaired test body;
step four: the test sample is tested.
6. The method according to claim 5, wherein: in the first step, the aerostat state simulation of the test body comprises the following steps: environmental simulation, inflation and deflation working state simulation and surface tension simulation;
the environment simulation is as follows: placing the aerostat skin material state monitoring system at the same position of the target aerostat, so that the test body and the target aerostat experience the same test environment; carrying out appearance, mechanical property and process performance tests on the test body, and analyzing ageing influence of the external environment on the skin material of the test body;
the inflation and deflation working states are simulated as follows: the pressure regulating module is used for controlling the inflation and deflation unit to periodically inflate and deflate the test body, so that the skin material of the test body periodically expands and contracts;
the surface tension simulation was: the working pressure of the test body was determined according to the following formula:
wherein: delta is the pressure coefficient, P s For working pressure of test body, P f For the target aerostat working pressure, R s For the radius of the test body, R f Is the target aerostat radius;
and taking the value of the pressure coefficient delta as 1, enabling the surface tension of the skin material of the test body to be consistent with the surface tension of the skin material of the target aerostat, and truly simulating the surface tension state of the skin of the target aerostat by 1:1.
7. The method according to claim 6, wherein: in the second step, the test sample is cut as follows: and completely evacuating the gas in the test body, and cutting the uniform, continuous and regular skin material of the test body at the corresponding part of the test body according to the test requirement to serve as a test sample.
8. The method according to claim 7, wherein: in the third step, during repairing, repairing materials with the same appearance, material and size are manufactured according to the cut test sample, and the repairing materials and the test body are assembled and molded in a heat sealing or gluing mode to complete sealing of the test body.
9. The method according to claim 6, wherein: the method further comprises the steps of: in the surface tension simulation, the pressure coefficient delta is increased to more than 1, and the accelerated creep is carried out so as to predict the creep change trend of the target aerostat skin material in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311866198.7A CN117890222A (en) | 2023-12-29 | 2023-12-29 | Aerostat skin material state monitoring system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311866198.7A CN117890222A (en) | 2023-12-29 | 2023-12-29 | Aerostat skin material state monitoring system and method |
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| Publication Number | Publication Date |
|---|---|
| CN117890222A true CN117890222A (en) | 2024-04-16 |
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| CN202311866198.7A Pending CN117890222A (en) | 2023-12-29 | 2023-12-29 | Aerostat skin material state monitoring system and method |
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| Country | Link |
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| CN (1) | CN117890222A (en) |
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2023
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