CN114295643B - System and method for testing dynamic wave absorbing performance of interference material - Google Patents
System and method for testing dynamic wave absorbing performance of interference material Download PDFInfo
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- CN114295643B CN114295643B CN202111677657.8A CN202111677657A CN114295643B CN 114295643 B CN114295643 B CN 114295643B CN 202111677657 A CN202111677657 A CN 202111677657A CN 114295643 B CN114295643 B CN 114295643B
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Abstract
The invention relates to a sample test box capable of simulating a scattering state of an interference material, a system and a method for testing dynamic wave-absorbing performance of the interference material, and relates to the field of dynamic wave-absorbing performance test of the interference material. The sample testing box comprises a hollow box body, wherein air inlets are formed in two opposite side surfaces of the box body, and at least one of the other opposite side surfaces is provided with an air outlet. The sample test box can truly reflect the wave absorbing performance of the interference material floating in the air.
Description
Technical Field
The invention relates to the field of dynamic wave-absorbing performance test of interference materials, in particular to a sample test box capable of simulating the dispersion state of the interference materials, a dynamic wave-absorbing performance test system and a dynamic wave-absorbing performance test method of the interference materials.
Background
The action mechanism of the absorption type interferents on radar waves is to attenuate target echoes through the actions of the component materials on absorption, scattering and the like of the radar waves, so that the detectability of the protected target is reduced. The wave absorbing performance is a key factor for protecting own targets by combining interference of absorption type interferents and traditional foil means and effectively attenuating incoming missile guided radar waves. The existing wave-absorbing performance measuring method can only test the reflectivity or electromagnetic parameters of a static sample, and cannot test the dynamic wave-absorbing performance of an interference material floating in the air.
The wave-absorbing property of the material is measured by a direct measurement method and an indirect measurement method. Direct measurement refers to a method of directly measuring reflectance or calculating reflectance from measured data by a simple operation. Direct measurement methods include the bow method, the coaxial method, the RCS test method, and the like. The indirect measurement rule is to measure the impedance of a material or an electromagnetic parameter of the material and then calculate the reflectivity of the material using a formula. The waveguide method is one of the methods commonly used in indirect measurement, and is mainly used for testing electromagnetic parameters of materials so as to calculate the wave absorbing performance of the materials.
However, the above measurement method can only test the reflectivity or electromagnetic parameters of a static sample, and cannot test the dynamic wave absorbing performance of an interference material floating in the air.
Disclosure of Invention
Therefore, the invention aims to provide a sample test box capable of simulating the dispersion state of an interference material, a dynamic wave-absorbing performance test system and a dynamic wave-absorbing performance test method of the interference material, which can simulate and test the dynamic wave-absorbing performance of the interference material which drifts in the air, so as to solve the technical problem that the existing test means cannot measure the dynamic wave-absorbing performance of the interference material.
The aim and the technical problems of the invention are realized by adopting the following technical proposal. According to the sample testing box capable of simulating the scattering state of the interference material, which is provided by the invention, the sample testing box comprises a hollow box body, wherein air inlets are formed in two opposite side surfaces of the box body, and at least one of the other two opposite side surfaces is provided with an air outlet.
Preferably, in the sample testing box capable of simulating the scattering state of the interference material, at least two air inlets are respectively formed on two opposite side surfaces of the box body, and at least one air outlet is respectively formed on two opposite side surfaces of the box body.
Preferably, in the sample test box capable of simulating the scattering state of the interference material, two air inlets are respectively formed in two opposite side surfaces of the box body, and one air outlet is respectively formed in the other two opposite side surfaces; the straight line formed by connecting two air inlets on one side face and the straight line formed by connecting two air inlets on the other side face form opposite crossing, and the included angle between the two is 30-90 degrees.
Preferably, in the sample testing box capable of simulating the scattering state of the interference material, a cover body is arranged on the upper cover of the box body, and the shape of the cover body is the same as that of the bottom surface of the box body.
Preferably, in the sample testing box capable of simulating the scattering state of the interference material, the box body and the cover body are detachably connected; the detachable connection is threaded connection, snap connection or hinge connection.
Preferably, in the sample test box capable of simulating the dispersion state of the interference material, the air inlet and the air outlet are both provided with filter screens, and the size of the filter screens is smaller than the characteristic size of the interference material.
Preferably, in the sample test box capable of simulating the dispersion state of the interference material, the air inlet is connected with an air pump through a pipeline; and air valves are arranged on the air inlets and the corresponding pipelines.
Preferably, in the sample testing box capable of simulating the scattering state of the interference material, the materials of the box body and the cover body are wave-transparent materials.
The aim and the technical problems of the invention can be achieved by adopting the following technical proposal. The invention provides a dynamic wave-absorbing performance test system for an interference material, which comprises an arch-shaped reflectivity test device and a sample test box capable of simulating the dispersion state of the interference material, wherein the arch-shaped reflectivity test device comprises a sample plate support, and the sample test box is placed on the sample plate support.
The aim and the technical problems of the invention can be achieved by adopting the following technical proposal. The invention provides a method for testing the dynamic wave absorbing performance of an interference material, which comprises the following steps:
uniformly dispersing the interference material in the test environment by adjusting the flow rate and direction of the gas;
the radar wave reflectivity of the interfering material was then tested by the bow method.
By means of the technical scheme, the sample test box capable of simulating the dispersion state of the interference material, the interference material dynamic wave-absorbing performance test system and the interference material dynamic wave-absorbing performance test method have at least the following beneficial effects:
the sample test box can truly reflect the wave absorbing performance of interference materials scattered in the air;
the sample test box is prepared from the wave-transparent material, does not reflect or attenuate radar waves, and can ensure the accuracy of test data.
The sample test box has a simple structure, is flexible and convenient to apply, can be combined with different test devices to form a dynamic wave-absorbing performance test system, and can be used for testing the dynamic wave-absorbing performance of the interference material.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a sample test chamber capable of simulating the dispersion state of an interfering material according to the present invention;
FIG. 2 is a schematic illustration of opposite sides (air inlets) of a sample test chamber according to the present invention that simulate the dispersion of interfering materials;
FIG. 3 is a schematic illustration of one of the other opposite sides (air outlet) of a sample testing chamber of the present invention that simulates the dispersion of interfering materials;
FIG. 4 is a schematic diagram of a dynamic wave-absorbing performance test system for an interfering material according to the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following is a detailed description of the specific implementation, the characteristics and the effects of the sample test box, the interference material dynamic wave absorbing performance test system and the method which are provided by the invention and can simulate the dispersion state of the interference material according to the invention with reference to the attached drawings and the preferred embodiment. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features or characteristics of one or more embodiments may be combined in any suitable manner.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1-3, some embodiments of the present invention provide a sample testing box capable of simulating a scattering state of an interference material, the sample testing box includes a hollow box body 1, wherein two opposite sides of the box body 1 are respectively provided with a first air inlet 3, a second air inlet 4, a third air inlet 5 and a fourth air inlet 6, and two opposite sides are respectively provided with a first air outlet 8 and a second air outlet 9. The dimensions of the sample testing box can be customized as desired according to specific testing requirements.
In the technical scheme, the gas enters from the air inlets of the opposite sides of the sample testing box in different directions, and flows through the boundary of the box body, so that turbulence is generated when two or more airflows flow through each other, the interference material to be tested is scattered in the space of the box body to do irregular movement, and the movement state of the interference material in the air after being distributed can be simulated more truly. And the air entering the sample test box is timely discharged through the air outlet, so that the sample test box is prevented from being damaged due to overhigh air pressure in the box body. The gas may be, for example, air or an inert gas.
In some embodiments of the present invention, the interference material is a radar wave absorbing interference material, which can absorb or attenuate radar waves, and the sample form can be spherical, needle-shaped or sheet-shaped, and the characteristic size of the sample is 20 μm-10 mm.
In some embodiments of the present invention, a straight line formed by connecting the first air inlet 3 and the second air inlet 4 on one side face and a straight line formed by connecting the third air inlet 5 and the fourth air inlet 6 on the other side face form opposite intersections, and an included angle between the two is 30 degrees to 90 degrees. By means of the arrangement, turbulence can be better formed between the first air inlet 3, the second air inlet 4, the third air inlet 5 and the fourth air inlet 6 when external air enters the sample testing box.
In some embodiments of the present invention, the cover 2 is provided on the case 1, and the shape of the cover 2 is the same as the shape of the bottom surface of the case 1. The cover body is arranged to form a closed space in the sample testing box, so that the interference material sample is prevented from escaping the sample testing box under the blowing of air flow.
In some embodiments of the present invention, the case 1 and the cover 2 are detachably connected, for example, may be a threaded connection, a snap connection, or a hinge connection, which is not limited herein. The purpose of the detachable connection is here to facilitate the placement and removal of the interfering material sample.
In some embodiments of the present invention, the first air inlet 3, the second air inlet 4, the third air inlet 5 and the fourth air inlet 6 are respectively provided with a filter screen for preventing the interfering objects from entering the air duct damage device. The first air outlet 8 and the second air outlet 9 are respectively provided with a filter screen to prevent interference objects from flying out from the air outlets. The screen is sized to be smaller than the characteristic dimensions of the interfering material. The corresponding screen may be selected based on the interfering material characteristic dimensions, for example, a 30-300 mesh screen may be selected.
The filter screen in the above embodiment may be made of mineral fibers, such as: asbestos, and the like; regenerated fibers, such as: viscose fiber, acetate fiber, etc.; synthetic fibers such as: nylon, dacron, acrylon, spandex, vinylon, polypropylene, polyvinyl chloride, etc.; inorganic fibers such as: glass fiber, etc.; it should be noted that, the material of the filter screen may not be metal fiber, because the metal fiber may reflect electromagnetic waves and may have an influence on the test result, for example, may deteriorate the wave absorbing performance of the test result display material.
In some embodiments of the present invention, the first air inlet 3, the second air inlet 4, the third air inlet 5 and the fourth air inlet 6 are respectively connected with an air pump through pipelines, so as to ensure that air enters from different directions, form turbulence, uniformly disperse the interfering objects in the box 1, and simulate the distribution state of the interfering objects in the air, i.e. make the interfering objects suspend in the box 1 in a floating state.
In some embodiments of the present invention, air valves are respectively disposed on the first air inlet 3, the second air inlet 4, the third air inlet 5, and the fourth air inlet 6 and corresponding pipelines, and the air valves are used to control the air flow direction and the air flow rate, so as to simulate different wind directions and air speeds through different air flow directions and air flow rates.
In some embodiments of the present invention, the bottom surface of the case 1 may be circular, square, regular hexagon, regular octagon, regular decagon or regular dodecagon, which is not specifically limited herein; however, the design of square is preferable in view of ease of processing and applicability to the bow test apparatus.
In some embodiments of the present invention, the materials of the case 1 and the cover 2 are wave-transparent materials, so as to ensure that the sample case itself does not reflect or attenuate radar waves, and ensure accuracy of test data. The wave-transmitting material includes, but is not limited to, resin-based composite materials, inorganic nonmetallic based composite materials, hybrid fiber composite materials, and the like, preferably resin-based composite materials such as unsaturated polyester resins, epoxy resins, phenolic resins, cyanate resins, silicone resins, polyimide resins, polytetrafluoroethylene resins, thermoplastic resins, and the like. The resin-based composite material has good mechanical property, good processability, good high-low temperature expansion resistance, shock resistance and impact resistance, and better bearing capacity.
As shown in fig. 2, some embodiments of the present invention further provide a system for testing dynamic wave absorbing performance of an interference material, which includes an arch-shaped reflectivity testing device and a sample testing box 80 capable of simulating a dispersion state of the interference material according to the above embodiments, where the sample testing box 80 is disposed on the arch-shaped reflectivity testing device; the bow-type reflectivity testing device comprises a bow-type bracket 10, a transmitting antenna 20, a receiving antenna 30, a template bracket 40, a vector network analyzer 50, a computer 60 and an intelligent temperature controller 70; the sample test case 80 is placed on the template holder 40.
In other embodiments of the present invention, the transmitting antenna 20 and the receiving antenna 30 are symmetrically fixed on the sliding rail of the semicircular bow 10, the sample to be measured is placed at the center position of the bow 10, and the test angle of the reflectivity is adjusted by adjusting the angular position of the antenna on the sliding rail of the bow 10. The sliding rail is a rail which is arranged on the bow-shaped frame and is convenient for the transmitting antenna and the receiving antenna to move.
In other embodiments of the present invention, the computer 60 communicates with the vector network analyzer 50 via a local area network LAN, and the connection between the vector network analyzer 50 and the transmitting antenna 20, and the connection between the vector network analyzer 50 and the receiving antenna 30 are via radio frequency cables or waveguides. When the reflectivity of the wave-absorbing material is tested, the bow-shaped frame 10 is controlled by a motor to drive the transmitting antenna 20 and the receiving antenna 30 to move, so that the multi-angle reflectivity test is realized; the electromagnetic waves emitted by the transmitting antenna 20 are reflected by the sample and received by the receiving antenna 30, and the other electromagnetic waves are absorbed by the background wave absorbing material (the tapered material shown in fig. 4); the two ports of the vector network analyzer 50 are respectively connected with the transmitting antenna 20 and the receiving antenna 30 for reflectivity test.
In other embodiments of the present invention, a background wave absorbing material is also included, which is located below the template holder 40. The background wave-absorbing material is arranged to remove the influence of the environment on the radar wave reflectivity test result of the material, and the accuracy of the test data is ensured.
In addition, in order to more truly reflect the wave absorbing performance of the interference material floating in the air, the invention also provides a method for testing the dynamic wave absorbing performance of the interference material, which comprises the following steps:
uniformly dispersing the interference material in the test environment by adjusting the flow rate and direction of the gas;
the radar wave reflectivity of the interfering material was then tested by the bow method.
In other embodiments of the invention, the test method comprises the steps of:
opening a cover body of the sample test box, and placing an interference material to be tested in the sample test box;
the air inlets are connected with the air pump, and the quantity and the direction of the air inlets required by opening are selected according to the test requirements;
uniformly dispersing the interference material in the sample test box by adjusting the flow rate and the direction of the gas;
then testing the radar wave reflectivity of the interference material by an arch method;
and after the test is finished, taking out the interference material sample, and recovering the test system. .
In other embodiments of the present invention, the test method specifically includes the following steps:
a, opening the cover body 2 of the sample testing box 80;
b, placing an interference material sample to be detected in the box body 1;
c, covering the cover body 2;
d, respectively connecting the first air inlet 3, the second air inlet 4, the third air inlet 5 and the fourth air inlet 6 with corresponding pipelines and air pumps, adjusting the flow speed and the direction of the air, opening an air valve to enable the air to enter, and uniformly dispersing the interference material sample in the box body 1 under the blowing of the air flow; specifically, the flow rate of the gas can be regulated by a gas valve, and the gas inlet direction can be regulated by selecting a gas inlet.
e, placing the box body 1 on a template bracket 40, and testing the radar wave reflectivity of the interference material sample by adopting an arch method (according to the national military standard GJB 2038A-2011);
f, after the test is finished, the sample test box 80 is taken down, the air valve is closed, and the interference material product is taken out.
Specifically, the step of testing the radar wave reflectivity of the interference material sample by the bow method is the prior art, and specifically comprises the following steps:
starting up and preheating a test system; prompting to input measurement parameters according to a program; placing the standard plate on a sample plate bracket, and keeping the temperature of the standard plate at a test temperature; measuring the reflected power of the standard plate; replacing the standard plate with the template to be tested, and keeping the temperature of the template to be tested at a test temperature; measuring the reflected power of the sample plate to be measured; processing data by a computer to obtain the reflectivity of the sample plate; and storing the test data and printing out the test result.
The temperature is 23+/-3 ℃ and the relative humidity is not more than 80 percent.
The invention will be further described with reference to specific examples, which are not to be construed as limiting the scope of the invention, but rather as falling within the scope of the invention, since numerous insubstantial modifications and adaptations of the invention will now occur to those skilled in the art in light of the foregoing disclosure.
Example 1
Opening the cover 2 of the sample testing box 80; placing a sheet-like interference material sample to be detected with a characteristic dimension of 2mm in a box body 1 (180 mm is 180 mm); covering the cover body 2; the first air inlet 3, the second air inlet 4, the third air inlet 5 and the fourth air inlet 6 are respectively connected with corresponding pipelines and air pumps, all the four front air inlets (the size of a filter screen is 50 meshes) are opened through air valves, the air valves are opened to enable air to enter, the air flow speed is controlled to be 4m/s, and the interference material samples are uniformly dispersed in the box body 1 under the blowing of the air flow; placing the box body 1 on a template bracket 40, and testing the radar wave reflectivity of an interference material sample by adopting an arch method (according to the national military standard GJB 2038A-2011), wherein the result is-12 dB; after the test is finished, the sample test box 80 is taken down, the air valve is closed, and the interference material product is taken out.
Example 2
Opening the cover 2 of the sample testing box 80; placing a spherical interference material sample to be detected with the particle size of 50 μm in a box body 1 (180 mm is 100 mm); covering the cover body 2; the first air inlet 3, the second air inlet 4, the third air inlet 5 and the fourth air inlet 6 are respectively connected with corresponding pipelines and air pumps, the front four air inlets (the size of a filter screen is 50 meshes) are all opened through air valves to enable air to enter, the air flow speed is controlled to be 8m/s, and the interference material samples are uniformly dispersed in the box body 1 under the blowing of the air flow; placing the box body 1 on a template bracket 40, and testing the radar wave reflectivity of an interference material sample by adopting an arch method (according to the national military standard GJB 2038A-2011), wherein the result is-15 dB; after the test is finished, the sample test box 80 is taken down, the air valve is closed, and the interference material product is taken out.
Example 3
Opening the cover 2 of the sample testing box 80; placing a needle-like interference material sample with the particle size of 4mm to be detected in a box body 1 (300 mm is 150 mm); covering the cover body 2; the first air inlet 3, the second air inlet 4, the third air inlet 5 and the fourth air inlet 6 are respectively connected with corresponding pipelines and air pumps, all the four front air inlets (the size of a filter screen is 200 meshes) are opened through air valves, the air valves are opened to enable air to enter, the air flow speed is controlled to be 10m/s, and the interference material samples are uniformly dispersed in the box body 1 under the blowing of the air flow; placing the box body 1 on a template bracket 40, and testing the radar wave reflectivity of an interference material sample by adopting an arch method (according to the national military standard GJB 2038A-2011), wherein the result is-14 dB; after the test is finished, the sample test box 80 is taken down, the air valve is closed, and the interference material product is taken out.
In the description of the present invention, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some embodiments, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (9)
1. The system is characterized by comprising an arch-shaped reflectivity testing device and a sample testing box capable of simulating the dispersion state of the interference material, wherein the arch-shaped reflectivity testing device comprises a sample plate bracket, and the sample testing box is placed on the sample plate bracket; the sample testing box comprises a hollow box body, wherein air inlets are formed in two opposite side surfaces of the box body, and at least one of the other opposite side surfaces is provided with an air outlet.
2. The system for testing dynamic wave absorbing performance of an interfering material according to claim 1, wherein the box body is provided with at least two air inlets on two opposite sides thereof, and at least one air outlet on two opposite sides thereof.
3. The system for testing dynamic wave absorbing performance of an interference material according to claim 2, wherein two air inlets are respectively formed in two opposite side surfaces of the box body, and one air outlet is respectively formed in the other two opposite side surfaces; the straight line formed by connecting the two air inlets on one side face and the straight line formed by connecting the two air inlets on the other side face form opposite crossing.
4. The system for testing dynamic wave absorbing performance of an interfering material according to claim 1, wherein the upper cover of the box body is provided with a cover body, and the shape of the cover body is the same as the shape of the bottom surface of the box body.
5. The system for testing dynamic wave absorbing performance of an interfering material according to claim 4, wherein the box body and the cover body are detachably connected.
6. The system for testing dynamic wave absorbing performance of an interfering material according to claim 1, wherein the air inlet and the air outlet are provided with filter screens, and the size of the filter screens is smaller than the characteristic size of the interfering material.
7. The interference material dynamic wave absorbing performance test system as set forth in claim 1, wherein the air inlet is connected with an air pump through a pipeline; and an air valve is arranged on the pipeline.
8. The system for testing dynamic wave absorbing performance of an interfering material according to claim 1, wherein the material of the case and the material of the cover are wave-transparent materials.
9. A method for testing the dynamic wave-absorbing performance of an interference material, which is implemented by the interference material dynamic wave-absorbing performance testing system according to any one of claims 1 to 8, and is characterized by comprising the following steps:
uniformly dispersing the interference material in the test environment by adjusting the flow rate and direction of the gas;
the radar wave reflectivity of the interfering material was then tested by the bow method.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135467A (en) * | 2010-12-27 | 2011-07-27 | 中国科学院光电技术研究所 | Hot-wind turbulence simulation device |
| CN103234941A (en) * | 2013-04-17 | 2013-08-07 | 中国工程物理研究院流体物理研究所 | Dynamic measurement device and method of material laser reflectivity under subsonic tangential airflow |
| CN113189121A (en) * | 2021-05-11 | 2021-07-30 | 中北大学 | Dynamic test system and method for reflectivity of wave-absorbing material of self-adaptive time domain gate |
| CN214440915U (en) * | 2021-01-14 | 2021-10-22 | 美欣达欣智造(湖州)科技有限公司 | Adjustable nodal pattern air separator |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7884259B2 (en) * | 2004-06-28 | 2011-02-08 | Daio Paper Corporation | Absorbent article |
| CN201255755Y (en) * | 2008-08-11 | 2009-06-10 | 李昆达 | Environment test equipment |
| CN101825524B (en) * | 2010-05-21 | 2012-05-23 | 西安交通大学 | Particle environment simulating system with particle motion friction electrification measurement function |
| ITPI20110138A1 (en) * | 2011-12-06 | 2013-06-07 | A R I A Engineering S R L | METHOD AND EQUIPMENT FOR REALIZING ENVIRONMENTS ENCLOSED BY AIR WALLS |
| CN203672980U (en) * | 2013-12-31 | 2014-06-25 | 上海煜鹏通讯电子有限公司 | Real environment simulated RF test tool |
| CN206114794U (en) * | 2016-08-31 | 2017-04-19 | 中国航空综合技术研究所 | Temperature humidity electromagnetism integrated environment analog device |
| CN109307582B (en) * | 2018-11-30 | 2020-11-10 | 重庆大学 | Wind field detection device and detection method of additive manufacturing equipment |
| CA3102864A1 (en) * | 2020-01-07 | 2021-07-07 | Perm Inc. | Methods and apparatus for determining the spatial distribution of materials using electromagnetic radiation |
-
2021
- 2021-12-31 CN CN202111677657.8A patent/CN114295643B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135467A (en) * | 2010-12-27 | 2011-07-27 | 中国科学院光电技术研究所 | Hot-wind turbulence simulation device |
| CN103234941A (en) * | 2013-04-17 | 2013-08-07 | 中国工程物理研究院流体物理研究所 | Dynamic measurement device and method of material laser reflectivity under subsonic tangential airflow |
| CN214440915U (en) * | 2021-01-14 | 2021-10-22 | 美欣达欣智造(湖州)科技有限公司 | Adjustable nodal pattern air separator |
| CN113189121A (en) * | 2021-05-11 | 2021-07-30 | 中北大学 | Dynamic test system and method for reflectivity of wave-absorbing material of self-adaptive time domain gate |
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