CN221199930U - Radar cross-section testing and imaging system - Google Patents
Radar cross-section testing and imaging system Download PDFInfo
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- CN221199930U CN221199930U CN202323083298.0U CN202323083298U CN221199930U CN 221199930 U CN221199930 U CN 221199930U CN 202323083298 U CN202323083298 U CN 202323083298U CN 221199930 U CN221199930 U CN 221199930U
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Abstract
The utility model discloses a radar cross section testing and imaging system, which comprises a fixed plane, a circular arc track fixed on the fixed plane and with radian not less than 180 degrees, a radio frequency receiving and transmitting antenna system slidably arranged on the circular arc track, a tested object turntable which is linearly slidably arranged on a fixed table top along the axis direction of the circular arc track, an azimuth rotating shaft which is arranged on the tested object turntable and rotates around a rotating shaft vertical to the fixed plane, an antenna driving device which respectively drives the radio frequency receiving and transmitting antenna system to slide, the azimuth rotating shaft to rotate and the tested object turntable to slide, a turntable rotating driving device, a turntable sliding driving device and a control system for starting and stopping the turntable rotating driving device, wherein the radio frequency receiving and transmitting antenna system communicated with the control system can transmit test signals and receive reflected signals to the tested object on the azimuth rotating shaft.
Description
Technical Field
The present utility model relates to electromagnetic scatter signal testing systems, and in particular to Radar Cross Section (RCS) testing and imaging systems.
Background
Conventional Radar Cross Section (RCS) testing techniques are typically dot-frequency. Only the radar cross-section and the relation between azimuth and frequency response can be obtained using this method, but no distribution of scattering centers is obtained.
The point frequency method firstly measures the signal to noise ratio (S/N) of the background from the bracket, ground reflection, remote area barriers and the like, then places the measured object on the support tower and measures the signal to noise ratio from the object background. Background noise can be basically eliminated through a secondary vector field subtraction technique (cancellation), so that the signal-to-noise ratio of a measured target is obtained, and then the signal-to-noise ratio of the target is calculated according to the following formula.
Most of traditional microwave darkroom measurement uses a point frequency mode, and the point frequency test has the greatest advantages of simple equipment and high data processing speed. The disadvantage is that only a Radar Cross Section (RCS) azimuth curve of a single frequency point can be obtained per measurement period (one revolution of the target relative to the radar), for low scattering targets a cancellation system needs to be added to eliminate darkroom background, and such background is not easy to eliminate.
Disclosure of utility model
In order to overcome the defects, the utility model provides a radar cross section testing and imaging system which can realize radar cross section full polarization scattering characteristic testing, dielectric characteristic measurement and synthetic aperture radar simulated imaging indoor testing in any frequency range.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a radar cross section test and imaging system, includes fixed plane, convex track, radio frequency receiving and transmitting antenna system, testee revolving stage, antenna driving device, revolving stage rotary drive, revolving stage drive and control system that slides, convex track fixed mounting is on fixed plane, and convex track radian is not less than 180 degrees, at least one radio frequency receiving and transmitting antenna system can be followed the gliding installation on convex track of convex track extension direction, the testee revolving stage can be followed the installation on fixed mesa of circular track axis direction straight reciprocating sliding, be equipped with on the testee revolving stage and can be around the rotatory azimuth pivot of the pivot of perpendicular to fixed plane, testee fixed mounting in the azimuth pivot, and the testee is located circular track central plane all the time, antenna driving device, revolving stage rotary drive and revolving stage drive respectively drive radio frequency receiving and testee revolving stage straight line slip, radio frequency receiving and the transmission of signals of orientation revolving stage, radio frequency receiving and transmitting antenna system can be towards the testee on the revolving stage, radio frequency receiving and receiving reflected signals, radio frequency receiving and transmitting antenna system communicates with control system, control system control antenna driving device, revolving stage rotary drive and revolving stage drive to stop the action.
As a further improvement of the utility model, the fixed plane is the ground of the microwave darkroom, the ground of the microwave darkroom is provided with a circular ring measuring area with the same diameter as the circular arc track, the circle center of the circular ring measuring area is positioned right below the circle center of the circular arc track, and the turntable of the object to be measured linearly slides between the circular ring center of the circular ring measuring area and the darkroom gate.
As a further improvement of the utility model, the fixed plane is provided with a linear slide rail, and the turntable of the measured object is arranged on the linear slide rail.
As a further improvement of the utility model, the two radio frequency transceiver antenna systems are respectively arranged on the circular arc track in a sliding way, and can observe Radar Cross Section (RCS) targets with different incidence angles of a single station and a double station.
As a further improvement of the utility model, two dual polarized receiving and transmitting antennas are arranged on the two radio frequency receiving and transmitting antenna systems.
As a further improvement of the utility model, the arc of the circular arc track is greater than 180 degrees.
As a further improvement of the utility model, the arc track support is also provided, the arc track support comprises a semicircular arc support and vertical positioning supports, the upper ends of the two vertical positioning supports are respectively fixedly arranged at the two ends of the semicircular arc support, the lower ends of the two vertical positioning supports are respectively fixedly connected with the positioning plane through a base, and the arc track is fixedly arranged on the inner ring surface of the arc track support.
As a further improvement of the utility model, the semicircular arc bracket is formed by sequentially splicing and combining a plurality of arc steel frameworks.
As a further improvement of the utility model, connectors are fixedly arranged on the vertical positioning support and each arc-shaped steel structure respectively, the connectors comprise a fixed seat, a connecting seat and connecting arms, the fixed seat is fixedly arranged on the vertical positioning support or the arc-shaped steel structure, one ends of the two connecting arms are respectively hinged with two sides of the fixed seat, the other ends of the two connecting arms are respectively hinged with two sides of the connecting seat, the connecting seat is fixedly connected with the outer circular side wall of the arc-shaped track, and the fixed seat, the connecting arms and the connecting seat form an isosceles trapezoid structure.
As a further improvement of the utility model, the radio frequency receiving and transmitting antenna system comprises a trolley, an antenna mounting seat, a connecting frame and an antenna angle positioning connecting piece, wherein the trolley can move along an arc track towards the inner side surface of one side of the circle center, one end of the connecting frame is fixedly arranged on the side wall of the trolley, the other end of the connecting frame is sleeved on the outer side of the arc track support, an adjusting rotating shaft axially extending along the arc track is arranged on the trolley, the antenna mounting seat can be mounted on the trolley in a rotating mode by a set angle around the adjusting rotating shaft, and the antenna angle positioning connecting piece can fixedly position the antenna mounting seat and the trolley.
The beneficial technical effects of the utility model are as follows: the utility model realizes the displacement of the measured object relative to the antenna positioned on the circular arc track through the rotation of the measured object turntable, thereby synthesizing aperture imaging, and also can realize the displacement of the measured object relative to the antenna positioned on the circular arc track through the translation of the measured object turntable, thereby synthesizing aperture imaging, arranging the whole system in a microwave dark room, and carrying out Radar Cross Section (RCS) target observation of different incidence angles of a single station and a double station through two radio frequency transceiver antenna systems, thereby realizing the scattering characteristic test of multiple incidence angles and multiple azimuth angles of the target under the environment without electric wave interference.
Drawings
FIG. 1 is a schematic perspective view of the structure of the present utility model;
FIG. 2 is a front view of the structural principle of the present utility model;
FIG. 3 is a top plan view of the structural principles of the present utility model;
FIG. 4 is a schematic view of the connector structure of the present utility model;
FIG. 5 is a schematic diagram of a RF transceiver antenna system according to the present utility model;
FIG. 6 is a front view of a two-dimensional aperture image obtained from an azimuthal rotation test;
FIG. 7 is a top view of a two-dimensional aperture image obtained from an azimuthal rotation test;
FIG. 8 is a front view of three-dimensional aperture imaging obtained by rotation of the azimuth axis of rotation in combination with sliding of the RF transceiver antenna system along the circular arc orbit;
FIG. 9 is a front view of a two-dimensional aperture image obtained by a single-object turntable linear sliding test;
FIG. 10 is a plan view of a two-dimensional aperture image obtained by linear sliding test of a turntable of an object to be measured;
Fig. 11 is a front view of three-dimensional aperture imaging obtained by sliding the turntable of the object to be measured along the circular arc track in a linear sliding fit with the radio frequency transceiver antenna system.
Detailed Description
In order that the technical content of the present utility model may be more clearly understood, the following detailed description of the embodiments is given only for better understanding of the content of the present utility model and is not intended to limit the scope of the present utility model. The components in the structures of the drawings of the embodiments are not to scale and thus do not represent actual relative sizes of the structures in the embodiments.
Examples: the utility model provides a radar cross section test and imaging system, including fixed plane 1, circular arc track 2, radio frequency receiving and dispatching antenna system 3, the thing revolving stage 4 of being surveyed, antenna drive arrangement, revolving stage rotary drive arrangement, revolving stage drive arrangement that slides and control system, circular arc track 2 fixed mounting is on fixed plane 1, and circular arc track 2 radian is not less than 180 degrees, at least one radio frequency receiving and dispatching antenna system 3 can be followed circular arc track 2 extending direction gliding and install on circular arc track 2, the thing revolving stage 4 of being surveyed can be followed circular arc track 2 axis direction and is installed on fixed mesa in the reciprocal gliding mode of straight line, be equipped with on the thing revolving stage 4 of being surveyed and can be rotatory about the pivot of perpendicular to fixed plane 1 azimuth pivot 5, the thing fixed mounting of being surveyed in azimuth pivot 5, and the thing of being surveyed is located on circular arc track 2 central plane all the time, antenna drive arrangement, revolving stage rotary drive arrangement and revolving stage drive arrangement that the revolving stage slides radio frequency receiving and dispatching antenna system 3 respectively, azimuth pivot rotates and the thing revolving stage 4 of being surveyed is slided, radio frequency receiving and dispatching antenna system 3 can be towards the thing revolving stage 4 of being surveyed and transmitting and receiving reflected signal, radio frequency receiving antenna system 3 and communication drive arrangement and control system drive arrangement that the revolving stage is stopped.
During testing, the radio frequency receiving and transmitting antenna system 3 slides along the circular arc track 2 to change the position, so as to change the incident angle of the antenna for transmitting signals and the angle of reflected signals to a tested object, the tested object turntable 4 can drive the tested object to rotate by controlling the rotation of the azimuth rotating shaft 5, so that the displacement of the tested object relative to the antenna positioned on the circular arc track is realized, thereby realizing the synthetic aperture imaging, and can also realize the displacement of the tested object relative to the antenna positioned on the circular arc track by controlling the linear translation of the tested turntable along the axial direction of the circular arc track 2, thereby realizing the synthetic aperture imaging.
The fixed plane 1 is the ground of a microwave darkroom, a circular ring measuring area 6 with the same diameter as the circular arc track 2 is formed on the ground of the microwave darkroom, the circle center of the circular ring measuring area 6 is positioned right below the circle center of the circular arc track 2, and the object turntable 4 slides linearly between the circular ring center of the circular ring measuring area 6 and the darkroom gate.
The testing system is positioned in the microwave darkroom, so that the testing can be performed in the environment without electric wave interference, and the circular ring measuring area 6 which is opposite to the circular arc track 2 is formed on the ground of the microwave darkroom, so that the linear sliding range of the tested object turntable 4 is limited.
The fixed plane 1 is provided with a linear slide rail 7, and the tested object turntable 4 is arranged on the linear slide rail 7. The linear sliding rail 7 guides the linear sliding of the turntable 4 of the tested object, so that the tested object is always on the central line of the circular arc-shaped track 2, and the testing accuracy is ensured.
The two radio frequency transceiver antenna systems 3 are respectively arranged on the circular arc-shaped track 2 in a sliding manner, and the two radio frequency transceiver antenna systems 3 can observe Radar Cross Section (RCS) targets with different incidence angles of a single station and a double station. Each radio frequency receiving and transmitting antenna system 3 can receive the reflected signal of the signal transmitted by the own antenna, and can also receive the transmitted signal of the signal transmitted by the antenna of the other radio frequency receiving and transmitting antenna system 3, so that RCS target observation with different incidence angles of a single station or a double station is formed.
Two dual polarized receiving and transmitting antennas 8 are arranged on the two radio frequency receiving and transmitting antenna systems 3. The system has four polarization transmitting/receiving capacities of HH/HV/VH/VV, and can acquire electromagnetic scattering characteristics of an object to be detected.
The radian of the circular arc-shaped track 2 is larger than 180 degrees. Through increasing the radian of the circular arc track, the two radio frequency receiving and transmitting antenna systems 3 can form a 180-degree movement track on the circular arc track 2, so that comprehensive measurement is formed, and the test precision is improved.
The arc track support 9 is further arranged, the arc track support 9 comprises a semicircular arc support 10 and vertical positioning supports 11, the upper ends of the two vertical positioning supports 11 are fixedly arranged at two ends of the semicircular arc support 10 respectively, the lower ends of the two vertical positioning supports 11 are fixedly connected with a positioning plane through a base respectively, and the arc track 2 is fixedly arranged on the inner ring surface of the arc track support 9. The arc-shaped track 2 is supported and positioned through the arc-shaped track support 9, so that the installation and positioning precision of the arc-shaped track 2 is ensured, and the accuracy of the movement track of the radio frequency receiving and transmitting antenna system 3 is ensured.
The semicircular arc bracket 10 is formed by sequentially splicing and combining a plurality of arc steel frameworks. The structure is convenient to assemble and manufacture, adopts a steel structure, has good overall strength, can ensure the radian of the circular arc-shaped track 2 and ensures the detection precision.
The vertical positioning support 11 and each arc steel structure are respectively fixedly provided with a connector 12, the connector 12 comprises a fixed seat 13, a connecting seat 14 and connecting arms 15, the fixed seat 13 is fixedly arranged on the vertical positioning support 11 or the arc steel structure, one ends of the two connecting arms 15 are respectively hinged to two sides of the fixed seat 13, the other ends of the two connecting arms 15 are respectively hinged to two sides of the connecting seat 14, the connecting seat 14 is fixedly connected with the outer circular side wall of the arc track 2, and the fixed seat 13, the connecting arms 15 and the connecting seat 14 form an isosceles trapezoid structure. The arc track bracket 9 is connected with the arc track 2 through the connector 12, and the connector 12 has a certain buffer adjusting effect, thereby being beneficial to ensuring the arc angle of the arc track 2.
The radio frequency receiving and transmitting antenna system 3 comprises a trolley 16, an antenna mounting seat 17, a connecting frame 18 and an antenna angle positioning connecting piece 19, wherein the trolley 16 can move along an arc track towards the inner side surface of one side of the circle center, one end of the connecting frame 18 is fixedly mounted on the side wall of the trolley 16, the other end of the connecting frame 18 is sleeved on the outer side of the arc track support 9, an adjusting rotating shaft axially extending along the arc track is arranged on the trolley 16, the antenna mounting seat 17 can rotate around the adjusting rotating shaft for setting an angle and is mounted on the trolley 16, and the antenna angle positioning connecting piece 19 can fixedly position the antenna mounting seat 17 and the trolley 16. The trolley 16 runs along the circular arc-shaped track 2 and is connected by the connecting frame 18, so that the trolley 16 is prevented from falling off, and meanwhile, the antenna mounting seat 17 can be sleeved with the adjusting rotating shaft for rotation adjustment, so that the antenna mounting seat and a measured object on the measured object turntable 4 are ensured to be opposite to transmit and receive signals.
The above embodiments are described in detail with reference to the accompanying drawings, and those skilled in the art can make various modifications or alterations to the above embodiments without departing from the spirit of the utility model.
Claims (10)
1. A radar cross-section testing and imaging system, characterized by: the radio frequency transceiver comprises a fixed plane (1), a circular arc track (2), a radio frequency transceiver antenna system (3), a tested object turntable (4), an antenna driving device, a turntable rotation driving device, a turntable sliding driving device and a control system, wherein the circular arc track is fixedly arranged on the fixed plane, the radian of the circular arc track is not less than 180 degrees, at least one radio frequency transceiver antenna system can be arranged on the circular arc track in a sliding manner along the extending direction of the circular arc track, the tested object turntable can be arranged on a fixed table top in a linear reciprocating manner along the axial direction of the circular arc track, an azimuth rotating shaft (5) capable of rotating around a rotating shaft perpendicular to the fixed plane is arranged on the tested object turntable, the tested object is fixedly arranged on the azimuth rotating shaft, and is always positioned on the center plane of the circular arc track, the antenna driving device, the turntable rotation driving device and the turntable sliding driving device respectively drive the radio frequency transceiver antenna system to slide, the azimuth rotating shaft to linearly slide with the tested object turntable, the radio frequency transceiver antenna system can emit test signals and receive reflected signals towards the tested object on the tested object turntable, and the radio frequency transceiver antenna system is in communication with the control system, and the control system controls the antenna driving device, the turntable rotation driving device and the turntable sliding driving device to stop.
2. The radar cross-section testing and imaging system of claim 1, wherein: the fixed plane is the ground of the microwave darkroom, a circular ring measuring area (6) with the same diameter as the circular arc track is formed on the ground of the microwave darkroom, the circle center of the circular ring measuring area is positioned right below the circle center of the circular arc track, and the tested object turntable linearly slides between the circular ring center of the circular ring measuring area and the darkroom gate.
3. The radar cross-section testing and imaging system of claim 1 or 2, characterized by: the fixed plane is provided with a linear slide rail (7), and the tested object turntable is arranged on the linear slide rail.
4. The radar cross-section testing and imaging system of claim 1, wherein: the two radio frequency transceiver antenna systems are arranged on the circular arc track in a sliding manner, and can observe radar cross section targets with different incidence angles of a single station and a double station.
5. The radar cross-section testing and imaging system of claim 4, wherein: two dual polarized receiving and transmitting antennas (8) are arranged on the two radio frequency receiving and transmitting antenna systems.
6. The radar cross-section testing and imaging system of claim 1, wherein: the radian of the circular arc-shaped track is greater than 180 degrees.
7. The radar cross-section testing and imaging system of claim 1, wherein: the arc track support is further provided with an arc track support (9), the arc track support comprises a semicircular arc support (10) and vertical positioning supports (11), the upper ends of the two vertical positioning supports are respectively fixedly arranged at the two ends of the semicircular arc support, the lower ends of the two vertical positioning supports are respectively fixedly connected with the positioning plane through a base, and the arc track is fixedly arranged on the inner ring surface of the arc track support.
8. The radar cross-section testing and imaging system of claim 7, wherein: the semicircular arc support is formed by sequentially splicing and combining a plurality of arc steel frameworks.
9. The radar cross-section testing and imaging system of claim 8, wherein: the connector comprises a fixed seat (13), a connecting seat (14) and connecting arms (15), wherein the fixed seat is fixedly arranged on the vertical positioning support or the arc-shaped steel structure, one ends of the two connecting arms are respectively hinged to two sides of the fixed seat, the other ends of the two connecting arms are respectively hinged to two sides of the connecting seat, the connecting seat is fixedly connected with the outer circular side wall of the circular arc-shaped track, and the fixed seat, the connecting arms and the connecting seat form a waist trapezoid structure.
10. The radar cross-section testing and imaging system of claim 1, wherein: the radio frequency receiving and transmitting antenna system comprises a trolley (16), an antenna mounting seat (17), a connecting frame (18) and an antenna angle positioning connecting piece (19), wherein the trolley can move along an arc track towards the inner side surface of one side of the circle center, one end of the connecting frame is fixedly arranged on the side wall of the trolley, the other end of the connecting frame is sleeved on the outer side of the arc track support, an adjusting rotating shaft axially extending along the arc track is arranged on the trolley, the antenna mounting seat can rotate around the adjusting rotating shaft for setting an angle and is mounted on the trolley, and the antenna angle positioning connecting piece can fixedly position the antenna mounting seat and the trolley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323083298.0U CN221199930U (en) | 2023-11-15 | 2023-11-15 | Radar cross-section testing and imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323083298.0U CN221199930U (en) | 2023-11-15 | 2023-11-15 | Radar cross-section testing and imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221199930U true CN221199930U (en) | 2024-06-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323083298.0U Active CN221199930U (en) | 2023-11-15 | 2023-11-15 | Radar cross-section testing and imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221199930U (en) |
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2023
- 2023-11-15 CN CN202323083298.0U patent/CN221199930U/en active Active
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