CN111272778B - Automatic switching type reflectivity test support and test method - Google Patents
Automatic switching type reflectivity test support and test method Download PDFInfo
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- CN111272778B CN111272778B CN202010158724.4A CN202010158724A CN111272778B CN 111272778 B CN111272778 B CN 111272778B CN 202010158724 A CN202010158724 A CN 202010158724A CN 111272778 B CN111272778 B CN 111272778B
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Abstract
The invention relates to an automatic switching type reflectivity test support and a test method, which comprise a base, a main shaft, small low-scattering supports, test piece connecting devices and material plates, wherein the main shaft is rotatably connected to the base, a plurality of small low-scattering supports are erected on the main shaft, a plurality of test piece connecting devices are erected on the small low-scattering supports, a plurality of material plates are erected on the test piece connecting devices, and one test piece connecting device is provided with a calibration reference plate.
Description
Technical Field
The invention relates to the technical field of radar wave-absorbing material reflectivity testing, in particular to an automatic switching type reflectivity testing support and a testing method.
Background
At present, in the field of RAM (radar absorbing material) reflectivity test, for flat-plate type absorbing materials, a far-field RCS test method is commonly adopted in domestic microwave darkrooms to detect the RAM reflectivity, and the method measures the reflection power of a good conductor metal flat plate with the same size and the reflection power of a flat-plate type RAM material plate respectively after a calibration reference plate is used for calibration, and calculates the reflectivity of the flat-plate type RAM according to the ratio of the reflection power of the good conductor metal flat plate with the same size and the reflection power of the flat-plate type RAM material plate.
When the reflectivity of the flat-plate RAM is measured, the influence of the environment needs to be eliminated, wherein the influence of the sample support is crucial, and because the low-scattering foam support is mainly adopted at present, the performance of the foam support is reduced after the foam support is used for a long time, the stray is improved, and the influence on the test is difficult to eliminate. Meanwhile, the test posture of the material sample plate is also important, and the measurement precision is directly related. Every survey a material sample, all need the tester to utilize the instrument to carry out level and straightness's that hangs down adjustment, it is hard to waste time, simultaneously, because people's limitation, hardly guarantee the gesture accuracy of change material model every time.
Therefore, in view of the above disadvantages, it is desirable to provide an automatic switching type reflectivity testing stand and testing method.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problems of influence of a foam support on a background, test consistency error caused by frequent replacement of samples and low efficiency in the conventional method.
(II) technical scheme
In order to solve the technical problem, the invention provides an automatic switching type reflectivity test support which comprises a base, a main shaft, small low-scattering supports, test piece connecting devices and material plates, wherein the main shaft is rotatably connected to the base, a plurality of small low-scattering supports are erected on the main shaft, a plurality of test piece connecting devices are erected on the small low-scattering supports, a plurality of material plates are erected on the test piece connecting devices, and one test piece connecting device is provided with a calibration reference plate.
By adopting the technical scheme, during testing, one calibration reference plate and seventeen test material plates are automatically switched to the testing position in a matched manner, the material plates do not need to be manually replaced, a plurality of test material plates can be switched randomly, the multi-band reflectivity test is completed, the influence of the support on the testing background can be reduced, the testing stability and consistency are ensured, the testing efficiency is greatly improved, and the testing device has good engineering application value.
As a further description of the present invention, preferably, a shielding screen is installed on the front frame of the base, the outer diameter of the shielding screen is larger than the total outer diameter enclosed by the material plates, and a window is installed on the top of the shielding screen, and the outer diameter of the window is the same as the outer diameter of a single material plate.
By adopting the technical scheme, only the material plate to be tested can reflect radar waves, so that the multiband reflectivity of the material plate can be accurately judged through the captured reflection signals.
As a further illustration of the invention, it is preferred that the small low scattering stent has a triangular cross-section with the cone-angle end of the small low scattering stent pointing towards the sheet of material.
By adopting the technical scheme, the situation that the radar waves reflected by the small low-scattering support are mixed with the radar waves reflected by the material plate to influence the judgment of the reflectivity of the material plate by a tester is avoided, the influence of a metal object on electromagnetic waves is reduced, and the accuracy of the test is ensured.
As a further description of the present invention, preferably, the test piece connecting device includes a tool and a magnetic gauge stand, the tool is fixedly connected to the small low scattering support, the magnetic gauge stand is fixedly connected to the tool, and the material plate is adsorbed on the magnetic gauge stand.
By adopting the technical scheme, the material plate can be quickly installed without adjustment, the consistency and accuracy of the test material are ensured, the device can be adjusted in two dimensions, and can be kept for a long time after being positioned once without adjustment.
As a further description of the present invention, it is preferable that the shielding screen includes a screen panel and screen tips, the screen panel is a square plate, the screen tips are in a quadrangular pyramid shape, and a plurality of screen tips are distributed on one side of the screen panel far from the material plate in a matrix shape.
By adopting the technical scheme, the screen tip is made of the wave-absorbing material and can absorb radar waves, so that the influence of the metal support on the radar waves is eliminated.
The invention also provides a testing method of the automatic switching type reflectivity testing bracket, which comprises the following steps,
firstly, mounting a calibration reference plate and a plurality of test material plates on a test piece connecting device before testing the reflectivity of the flat plate type radar wave-absorbing material by an RCS (radar cross section) testing method;
placing a wave-absorbing material shielding screen in front of the base, adjusting the calibration reference plate to a test position through electric control equipment, and carrying out calibration test on the system;
III, adjusting the test material plate with the same size to a test position through electric control equipment;
and IV, the system finishes frequency sweep echo data acquisition on the material plate, and obtains the radar reflectivity of the test material plate through calculation processing.
By adopting the technical scheme, the material plates required to be tested can be automatically switched, the test plate is automatically adjusted to the test position, the test stability and consistency are ensured, the working efficiency is greatly improved, and the calibration reference plate is additionally arranged so as to be calibrated, so that the test accuracy is further improved.
As a further explanation of the present invention, it is preferable that when the test material plate size is not larger than 300mm × 300mm, 17 material plates are installed on the spindle through 17 wheel disc arms at most, and after calibration is completed, the test is performed sequentially.
Through adopting above-mentioned technical scheme, can make the support can test more material board simultaneously, improve work efficiency.
As a further illustration of the invention, it is preferred that when the test material plate size is greater than 300mm x 300mm, part of the wheel arm, small low scatter support and test piece attachment means are removed.
Through adopting above-mentioned technical scheme to the bigger survey test panel of test area improves the suitability of support.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
according to the invention, the calibration reference plate and the test material plate are respectively arranged on the reflectivity support, the positions of the reference plate and the material plate are well adjusted, and the wave-absorbing material shielding screen is arranged, so that the influence of the support on the background is reduced; in the testing process, the electronic control automatic switching test material plates are matched to the testing position, the plurality of test material plates can be switched at will without manually replacing the material plates, the multiband reflectivity test is completed, and the problems of influences of a foam support on the background, test consistency errors caused by frequent replacement of samples and defects of low efficiency in the conventional method are solved.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a rear view of the present invention;
FIG. 3 is a structural view of a test piece connecting device of the present invention;
fig. 4 is a side view of the present invention.
In the figure: 1. a base; 2. a main shaft; 21. a wheel disc arm; 3. a small low scattering scaffold; 4. a test piece connecting device; 41. assembling; 42. a magnetic watch base; 5. a sheet of material; 6. a shielding screen; 61. a screen panel; 62. and a screen tip.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The utility model provides an automatic switching formula reflectivity test support, combine fig. 2, fig. 4, including base 1, main shaft 2, little low scattering support 3, test piece connecting device 4 and material board 5, main shaft 2 rotates to be connected on base 1, a plurality of little low scattering support 3 erects on main shaft 2, a plurality of test piece connecting device 4 erects on little low scattering support 3, a plurality of material board 5 erects on test piece connecting device 4, install the calibration benchmark board on one of them test piece connecting device 4.
With reference to fig. 2 and 4, the base 1 is an equilateral triangle with a side length of 1973.21mm and a height of 1709.47mm, and the base 2 is placed on the ground to support the whole set of test rack; a plurality of wheel disk arms 21 are fixedly connected to the main shaft 2 at intervals in an annular shape, and the small low scattering support 3 is fixedly connected to the wheel disk arms 21; the length of the small low scattering support 3 is 500mm, the cross section of the small low scattering support 3 is triangular, and the cone angle end of the small low scattering support 3 points to the material plate, so that the situation that the small low scattering support 3 reflects radar waves and the radar waves reflected by the material plate 5 are mixed, the judgment of a tester on the reflectivity of the material plate 5 is influenced, the influence of metal objects on electromagnetic waves is reduced, and the accuracy of the test is ensured.
With reference to fig. 2 and 3, the test piece connecting device 4 comprises a tool 41 and a magnetic gauge stand 42, the tool 41 is fixedly connected to the small low scattering support 3, the magnetic gauge stand 42 is fixedly connected to the tool 41, and the material plate 5 is adsorbed on the magnetic gauge stand and used for quickly and conveniently installing the calibration reference plate and the test material plate 5 without adjustment, so that the consistency and accuracy of the test material are ensured, and the device can be adjusted in two dimensions and can be kept for a long time after being positioned once without adjustment.
With reference to fig. 1 and 4, a shielding screen 6 is erected in front of the base 1, the shielding screen 6 includes a screen panel 61 and a screen tip 62, the screen panel 61 is a square plate, and the outer diameter of the screen panel 61 is 3500mm × 3500mm, which is larger than the total outer diameter enclosed by the material plates 5; the screen points 62 are in a quadrangular pyramid shape, the screen points 62 are distributed on one side of the screen board 61 far away from the material board 5 in a matrix shape, and the screen points 62 are made of wave-absorbing materials and can absorb radar waves, so that the influence of the metal support on the radar waves is eliminated; the top of the shielding screen 6 is provided with a window, the outer diameter of the window is the same as that of the single material plate 5, and only the material plate 5 to be tested can reflect radar waves, so that the multiband reflectivity of the material plate 5 can be accurately judged through captured reflection signals.
Through adopting the test support, during the test, automatically controlled automatic switch-over one calibration benchmark board and seventeen test material boards 5 to the test position (promptly window department) need not artifical change material board, can switch over polylith test material board 5 wantonly, accomplishes the reflectivity test of multiband, not only can reduce the influence of support to the test background, has guaranteed test stability, uniformity, has improved efficiency of software testing more greatly, possesses good engineering application and worth.
The invention also provides a testing method of the automatic switching type reflectivity testing bracket, which comprises the following steps,
firstly, mounting a calibration reference plate and a plurality of test material plates 5 on a test piece connecting device 4 before testing the reflectivity of the flat plate type radar wave-absorbing material by an RCS test method;
1. when the size of the test material plate 5 is not more than 300mm multiplied by 300mm, the main shaft 2 is connected with 17 wheel disc arms 21 through bolts at most to install 17 material plates 5, after calibration is completed, sequential testing is carried out, the support can simultaneously test more material plates 5, and the working efficiency is improved;
2. when the size of the test material plate 5 is larger than 300mm multiplied by 300mm, part of the wheel disc arm 21, the small low scattering bracket 3 and the test piece connecting device 4 are disassembled so as to install the test plate 5 with a larger test area of the box and improve the applicability of the bracket;
adjusting the calibration reference plate to a test position through electric control equipment, wherein the calibration reference plate is vertical to the ground at the moment, the center of the plate surface is 3000mm away from the ground, a wave-absorbing material shielding screen 5 is placed in front of the base 1, the calibration reference plate is adjusted to the test position through the electric control equipment, and the system is subjected to calibration test;
III, adjusting the test material plate 5 with the same size to a test position through electric control equipment;
and IV, the system finishes sweep frequency echo data acquisition on the material plate 5, and obtains the radar reflectivity of the test material plate through calculation processing.
Before testing, the calibration reference plate and the test material plate 5 are respectively arranged on the base 1, the positions of the reference plate and the material plate 5 are well adjusted, at most one calibration reference plate and seventeen test material plates 5 can be arranged at one time, and the wave-absorbing material shielding screen 6 is arranged, so that the influence of the support on the background is reduced. In the testing process, the seventeen testing material plates 5 are automatically switched to the testing position in a matched mode, the material plates 5 do not need to be replaced manually, the plurality of testing material plates 5 can be switched randomly, the multi-band reflectivity test is completed, the testing stability and consistency are guaranteed, the working efficiency is greatly improved, and the calibration reference plate is additionally arranged so as to be calibrated, and the testing accuracy is further improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A test method of an automatic switching type reflectivity test support relates to an automatic switching type reflectivity test support, and comprises a base (1), a main shaft (2), small low-scattering supports (3), test piece connecting devices (4) and test material plates (5), wherein the main shaft (2) is rotatably connected to the base (1), a plurality of small low-scattering supports (3) are erected on the main shaft (2), a plurality of test piece connecting devices (4) are erected on the small low-scattering supports (3), a plurality of test material plates (5) are erected on the test piece connecting devices (4), and one test piece connecting device (4) is provided with a calibration reference plate; a shielding screen (6) is erected in front of the base (1), the outer diameter of the shielding screen (6) is larger than the total outer diameter surrounded by the test material plates (5), a window is arranged at the top of the shielding screen (6), and the outer diameter of the window is the same as the outer diameter of a single test material plate (5); the method is characterized in that: comprises the following steps of (a) carrying out,
firstly, mounting a calibration reference plate and a plurality of test material plates (5) on a test piece connecting device (4) before testing the reflectivity of the flat plate type radar wave-absorbing material by an RCS (radar cross section) testing method;
placing a wave-absorbing material shielding screen (6) in front of the base (1), adjusting the calibration reference plate to a test position through electric control equipment, and carrying out calibration test on the system;
III, adjusting the test material plate (5) with the same size to a test position through electric control equipment;
and IV, the system finishes the sweep frequency echo data acquisition of the test material plate (5), and the radar reflectivity of the test material plate (5) is obtained through calculation processing.
2. The method of claim 1, wherein the step of testing the automatically switchable reflectance test fixture comprises: the section of the small low scattering bracket (3) is triangular, and the cone angle end of the small low scattering bracket (3) points to the test material plate (5).
3. The method of claim 1, wherein the step of testing the automatically switchable reflectance test fixture comprises: the test piece connecting device (4) comprises a tool (41) and a magnetic gauge stand (42), the tool (41) is fixedly connected to the small low-scattering support (3), the magnetic gauge stand (42) is fixedly connected to the tool (41), and the test material plate (5) is adsorbed on the magnetic gauge stand (42).
4. The method of claim 1, wherein the step of testing the automatically switchable reflectance test fixture comprises: shielding screen (6) include screen panel (61) and screen point (62), and screen panel (61) are square board, and screen point (62) are the quadrangular pyramid form, and a plurality of screen point (62) are the matrix and distribute in one side that test material board (5) are kept away from in screen panel (61).
5. The method of claim 1, wherein the step of testing the automatically switchable reflectance test fixture comprises: when the size of the test material plate (5) is not more than 300mm multiplied by 300mm, the main shaft (2) is provided with 17 test material plates (5) through 17 wheel disc arms (21) at most, and after calibration is finished, the test is carried out in sequence.
6. The method of claim 1, wherein the step of testing the automatically switchable reflectance test fixture further comprises the steps of: when the size of the test material plate (5) is larger than 300mm multiplied by 300mm, part of the wheel disc arm (21), the small low scattering bracket (3) and the test piece connecting device (4) are disassembled.
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| CN111721742B (en) * | 2020-06-29 | 2023-11-17 | 亚士漆(上海)有限公司 | Paint wet film hiding power test auxiliary device and paint wet film hiding power test method |
| CN111999713B (en) * | 2020-08-20 | 2023-06-09 | 北京环境特性研究所 | Pit, RCS microwave darkroom comprising pit and method for replacing bracket in darkroom |
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