Mobile test system compatible with whole machine and local radar scattering characteristic test

Abstract

A mobile test system compatible with whole machine and local radar scattering characteristic tests is characterized in that four Mecanum wheels are mounted at four corners of the bottom of an omnidirectional navigation vehicle, so that the omnidirectional navigation vehicle can advance, retreat, rotate in situ, wind at any angle and move transversely; the vertical lifting rod is mounted on the omni-directional navigation vehicle and can meet the stroke requirement at any position and ensure the safety of a load; the azimuth turntable assembly is mounted at the upper end of the vertical lifting rod and can rotate in the horizontal direction so as to ensure that a radar antenna orthogonally irradiates a measured target; a mounting surface is arranged on the outer side of the azimuth turntable assembly and is used for detachably mounting a radar test system, and the radar test system comprises a complete machine test radar system and a local test radar system. According to the utility model, the rapid detection requirement of the scattering performance of the full-size airplane is realized, and the high efficiency, economy, safety and operability of detection are considered.

Description

Technical Field

[0001] This utility model relates to the field of radar scattering characteristic testing, specifically to a mobile testing system that is compatible with both whole-aircraft and local radar scattering characteristic testing, capable of performing overall testing of a full-size aircraft and fine-grained scattering performance testing of local parts and components, thereby enabling rapid on-site detection and diagnosis. Background Technology

[0002] The stealth design of aircraft is complex and requires high-level surface finishing. Its stealth performance is closely related to the consistency of materials, manufacturing and assembly processes, and surface condition. Various discretenesses in the aircraft production process control and changes in the surface condition of components after assembly can have a fatal impact on the equipment's stealth performance. Currently, the static outdoor and indoor compressed fields used in aircraft development may not meet the requirements for rapid, real-time on-site imaging and RCS diagnostic evaluation of stealth equipment, and may also fail to meet the heavy load-bearing support requirements of stealth equipment. In contrast, near-field testing, with its on-site diagnostic capabilities for electromagnetic properties, is a much-needed testing platform for current stealth weapons and equipment.

[0003] Therefore, how to quickly test the scattering performance of a full-size aircraft, including overall testing of the full-size aircraft and detailed scattering performance testing of local parts and components, so as to achieve rapid on-site diagnosis and testing, has become a technical problem that needs to be solved by existing technologies. Utility Model Content

[0004] The purpose of this invention is to propose a mobile testing system that is compatible with both whole-aircraft and local radar scattering characteristic testing. It can install whole-aircraft test radar and local test radar respectively to meet the needs of rapid detection of the scattering performance of full-size aircraft, while taking into account the efficiency, economy, safety and operability of the test.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A mobile testing system compatible with both whole-machine and local radar scattering characteristic testing includes an omnidirectional navigation vehicle, a vertical lifting pole, an azimuth turntable assembly, and a radar system.

[0007] The omnidirectional navigation vehicle is equipped with four sets of Mecanum wheels at its four bottom corners, enabling it to move forward, backward, rotate in place, circle at any angle, and move laterally.

[0008] The vertical lifting rod, installed on the omnidirectional navigation vehicle, can maintain the required stroke at any position and ensure the safety of the load.

[0009] The azimuth turntable assembly is installed at the upper end of the vertical lifting rod and can rotate in the horizontal direction to ensure that the radar antenna is directly aimed at the target being measured.

[0010] An installation surface is arranged outside the azimuth turntable assembly, and is used for detachably mounting a radar test system, which includes an overall test radar system and a local test radar system.

[0011] Optionally, the omnidirectional navigation vehicle is also provided with a positioning system, which is two positioning antennas arranged at the side of the vehicle and the top of the azimuth turntable assembly.

[0012] The omnidirectional navigation vehicle further includes four sets of servo cylinder support bases.

[0013] Optionally, the vertical lifting rod is self-locking and has electrical and mechanical limit protection functions at the bottom and the top.

[0014] The azimuth turntable assembly has a rotation angle range of ±8° and an accuracy of ±0.1°.

[0015] Optionally, the overall test radar system includes an overall test radar host, an overall radio frequency front end and an overall antenna group, and is fixedly installed as a whole on the installation surface through a connecting frame structure.

[0016] The overall test radar host is installed inside the connecting frame structure, the connecting frame structure is provided with an antenna installation plate at the front end, the antenna installation plate is provided with the overall radio frequency front end at the back, and the overall antenna group is installed on the antenna installation plate through a lifting module.

[0017] Optionally, the overall test radar host includes one high-stability time base module, three frequency sources and three local oscillation sources, two sets of double-channel transceiver assemblies and one set of multi-channel digital acquisition cards.

[0018] The overall radio frequency front end is internally integrated with an integrated power amplifier, a low-noise amplifier, a polarization control unit and a self-checking unit.

[0019] The overall antenna group is provided with two sets of 1-4 GHz, 4-8 GHz, 8-12 GHz and 12-18 GHz dual-polarized antennas.

[0020] Optionally, the local test radar system includes a local test radar host and a local electrically scanned antenna array, and is fixedly installed through an adapter tool.

[0021] The local electrically scanned antenna array is arranged at the front end, and the local test radar host is installed on the adapter tool at the back of the local electrically scanned antenna array.

[0022] Optionally, the local electrically scanned antenna array is provided with multiple sets of 4-8 GHz and 8-18 GHz dual-polarized antennas, is internally integrated with a polarization switch and a low-noise amplifier, and is integrated with a 4-18 GHz power amplifier.

[0023] The local test radar host computer integrates a high-stable time base module, one frequency source and local oscillator source, one 8-channel receiving transceiver component and a multi-channel digital acquisition card.

[0024] Optionally, the calibration foam support is a circular truncated cone structure, and the calibration ball is arranged at the top end of the calibration foam support.

[0025] Optionally, the calibration ball is made of aluminum, and the calibration foam support is made of polystyrene foam.

[0026] Optionally, the wave-absorbing material with a wedge is further included to shield a strong stray scattering source including a non-test target beside the wave-absorbing material.

[0027] The utility model has the advantages that:

[0028] 1. Flexible deployment and automatic scene switching. The target is erected on the equipment site, and the SAR measurement mode of the whole-angle domain scattering characteristics of the whole machine is obtained by the test equipment around the target doing circumferential scanning motion, the size of the measured target and the test environment are not limited, and the erection platform is designed in an integrated manner, so that convenient movement and automatic navigation are realized.

[0029] 2. Different radar systems can be replaced to realize rapid conversion in different modes; the vertical lifting rod and the azimuth turntable assembly are arranged on the omnidirectional vehicle, so that the height and angle of the radar system are adjusted to perform accurate measurement.

[0030] 3. Rapid detection and higher imaging effect. The local measurement single-antenna mechanical scanning mode of the equipment is improved, a more advanced and rapid "electric scanning" array mode is adopted, the scanning and measuring time is reduced from several minutes to seconds, the equipment stealth defect measurement efficiency is improved, and the equipment has the characteristics of light weight and small size. Compared with the mechanical scanning track, the "electric scanning" array is light in weight and small in size, the lateral size is reduced, and the target scanning range is increased. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a whole schematic view of a mobile test system compatible with whole machine and local radar scattering characteristic test according to a specific embodiment of the utility model;

[0032] Figure 2 is another whole schematic view of a mobile test system compatible with whole machine and local radar scattering characteristic test according to a specific embodiment of the utility model;

[0033] Figure 3 is a schematic view of an AMR omnidirectional navigation vehicle according to a specific embodiment of the utility model;

[0034] Figure 4 is a schematic diagram of a vertical lifting rod according to an embodiment of the present application;

[0035] Figure 5 is a schematic diagram of an azimuth turntable assembly according to an embodiment of the present application;

[0036] Figure 6 is a schematic diagram of a positioning system according to an embodiment of the present application;

[0037] Figure 7 is a schematic diagram of a whole machine radio frequency front end according to an embodiment of the present application;

[0038] Figure 8 is a schematic diagram of a whole machine test radar main machine according to an embodiment of the present application;

[0039] Figure 9 is a schematic diagram of a whole machine antenna group according to an embodiment of the present application;

[0040] Figure 10 is a schematic diagram of a local test radar main machine according to an embodiment of the present application;

[0041] Figure 11 is a schematic diagram of a local electrically scanned antenna array according to an embodiment of the present application;

[0042] Figure 12 is a schematic diagram of a whole machine test system and a local test system of a mobile test system based on a kind of compatible whole machine and local radar scattering characteristic test according to an embodiment of the present application;

[0043] Figure 13 is a schematic diagram of a calibration ball and foam support of a mobile test system based on a kind of compatible whole machine and local radar scattering characteristic test according to an embodiment of the present application;

[0044] Figure 14 is a schematic diagram of wave-absorbing material of a mobile test system based on a kind of compatible whole machine and local radar scattering characteristic test according to an embodiment of the present application.

[0045] The technical features respectively indicated by the reference numerals in the drawings are:

[0046] 1, AMR omnidirectional navigation vehicle;2, vertical lifting rod;3, azimuth turntable assembly;4, positioning system;5, whole machine radio frequency front end;6, whole machine test radar main machine;7, whole machine antenna group;8, local test radar main machine;9, local electrically scanned antenna array;10, mounting surface;11, whole machine test radar system;12, local test radar system;13, wave-absorbing material. DETAILED DESCRIPTION

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0048] The main features of this invention are: using an AMR omnidirectional navigation vehicle as the mobile vehicle body, with a vertical lifting rod installed on the mobile vehicle body, and an azimuth turntable assembly installed on the top of the vertical lifting rod to adjust the height and angle of the installed radar test system. A mounting surface is provided on the azimuth turntable assembly for interchangeable installation of the radar test system, thus realizing an unmanned scanning test platform. This allows for compatibility with both whole-aircraft and partial test systems, thereby meeting the need for rapid detection of the scattering performance of full-size aircraft while ensuring high efficiency, economy, safety, and operability.

[0049] For details, see Figure 1 and Figure 2 This is a schematic diagram of a mobile testing system based on a specific embodiment of the present invention, which is compatible with both whole-machine and local radar scattering characteristic testing. Figure 1 The installed system is a whole-machine testing radar system. Figure 2 The installed system is a local testing radar system.

[0050] Figures 3-11 This is a schematic diagram of the various components of a mobile testing system based on a specific embodiment of the present invention, which is compatible with both whole-machine and local radar scattering characteristic testing.

[0051] A mobile testing system compatible with both whole-machine and local radar scattering characteristic testing includes an omnidirectional navigation vehicle, a vertical lifting pole 2, an azimuth turntable assembly 3, and a radar system.

[0052] The omnidirectional navigation vehicle 1, such as an AMR omnidirectional navigation vehicle, has four sets of Mecanum wheels installed at the four corners of its bottom, which enables the AMR omnidirectional navigation vehicle to move forward, backward, rotate in place, circle at any angle, and move laterally.

[0053] The vertical lifting rod 2 is installed on the omnidirectional navigation vehicle 1, and can maintain the required stroke at any position while ensuring the safety of the load.

[0054] The azimuth turntable assembly 3 is installed on the upper end of the vertical lifting rod 2 and can rotate in the horizontal direction to ensure that the radar antenna is directly aimed at the target being measured.

[0055] An installation surface 10 is arranged outside the azimuth turntable assembly 3, and is used for detachably mounting a radar test system, which comprises a whole machine test radar system 11 and a local test radar system 12, so as to respectively work in a whole machine test mode and a local test mode, and is compatible with whole machine and local radar scattering characteristic tests.

[0056] Furthermore, a positioning system 4 is further arranged on the omnidirectional navigation vehicle, and the positioning system comprises two positioning antennas, which are arranged at the side of the vehicle and the top of the azimuth turntable assembly respectively.

[0057] The omnidirectional navigation vehicle 1 further comprises four sets of servo cylinder supporting bases, which are used for fixed point tests when a high antenna is used, and have a stabilizing effect.

[0058] The mobile test system adopts RTK positioning navigation technology when working in an outdoor environment.

[0059] Furthermore, the vertical lifting rod 2 is self-locked, and has electrical and mechanical limiting protection functions at the bottom and the top.

[0060] The rotation angle range of the azimuth turntable assembly is ±8°, and the precision is ±0.1°.

[0061] The whole machine test radar system 11 comprises a whole machine test radar host 6, a whole machine radio frequency front end 5 and a whole machine antenna group 7, and is fixedly installed as a whole through a connecting frame structure and arranged on the installation surface 10.

[0062] The whole machine test radar host 6 is installed in the connecting frame structure, and comprises one high-stability time base module, three frequency sources and local oscillation sources, two sets of double-channel transceiver assemblies and one set of multi-channel digital acquisition cards.

[0063] The connecting frame structure is provided with an antenna mounting plate at the front end, the whole machine radio frequency front end 5 is mounted on the back surface of the antenna mounting plate, and the whole machine radio frequency front end 5 is internally integrated with an integrated power amplifier, a low-noise amplifier, a polarization control unit and a self-checking unit.

[0064] Referring to Figure 9 The whole machine antenna group 7 is installed on the antenna mounting plate through a lifting module, and two sets of 1-4GHz, 4-8GHz, 8-12GHz and 12-18GHz dual-polarized antennas are installed, and the antennas have the characteristics of wide working bandwidth, low sidelobe, good consistency of E-plane and H-plane beam width.

[0065] The local test radar system 12 comprises a local test radar host 8 and a local electrically scanned antenna array 9, and is fixedly installed as a whole through an adapter tool.

[0066] Referring to Figure 11 The local electrically scanning antenna array 9 is installed with multiple sets of 4-8GHz and 8-18GHz dual-polarized antennas, internally integrated polarization switches and low-noise amplifiers, and integrated 4-18GHz power amplifiers, so as to realize the functions of transmitting frequency band selection and antenna gating.

[0067] The local test radar host 8 is installed on the back of the local electrically scanning antenna array 9, adopts a single transmitting source and a multi-channel receiving mode, and is integrated with one high-stability time base module, one frequency source and local oscillator source, one 8-channel receiving transceiver assembly and one multi-channel digital acquisition card.

[0068] Therefore, referring to Figure 12 The whole machine test and local test of the application share the AMR omnidirectional navigation vehicle, when the test mode is switched, the corresponding test mode structure system, i.e., the whole machine test radar system 11 and the local test radar system 12, needs to be replaced on the hardware, the test mode is directly switched on the test software page on the software, the AMR omnidirectional navigation vehicle is provided with a battery and a switch, which provides power supply and network control for the whole system (see Figure 12 ), and all the lines use aviation plug connectors, which are convenient and fast to replace.

[0069] Further, referring to Figure 13 The mobile test system further comprises a calibration foam support and a calibration ball located on the support, wherein the calibration foam support is a circular table structure with a small top diameter and a large bottom diameter, and the calibration ball is arranged at the top end.

[0070] The calibration ball is made of aluminum, and an exemplary model can be 6061; the calibration foam support is made of polystyrene foam.

[0071] Referring to Figure 14 The mobile test system further comprises wave-absorbing material 13 with a split tip, which can block objects such as jacks in the test site to reduce unnecessary scattering.

[0072] During specific testing, a low-scattering metal cover can also be arranged on the surface of other objects, and a shaped wave-absorbing material is wrapped around the metal cover, so that the supporting jack has low scattering performance in the full frequency band.

[0073] In summary, the mobile test system has the following advantages:

[0074] 1. Flexible deployment, automatic transition. The target is erected on the equipment site, and the SAR measurement mode of the whole-angle domain scattering characteristics of the whole machine is obtained by the test equipment around the target doing circular scanning motion, the size of the target and the test environment are not limited, the erection platform adopts integrated design, realizes convenient movement and automatic navigation.

[0075] 2. Different radar systems can be replaced to realize rapid conversion in different modes; a vertical lifting rod and an azimuth turntable assembly are arranged on the omnidirectional vehicle, so that the height and angle of the radar system are adjusted to perform accurate measurement.

[0076] 3. Detection is fast, and imaging effect is higher. By improving the local measurement single antenna mechanical scanning mode of the equipment, a more advanced and fast "electric scanning" array mode is adopted, the scanning measurement time is reduced from several minutes to seconds, the stealth defect measurement efficiency of the equipment is improved, and the equipment has the characteristics of light weight and small size. Compared with the mechanical scanning track, the "electric scanning" array is light in weight and small in size, which reduces the lateral size and increases the target scanning range.

[0077] The above is a further detailed description of the utility model in combination with the preferred embodiments, which cannot be regarded as the only embodiment of the utility model, and the ordinary skilled in the art of the utility model can make some simple deductions or substitutions without departing from the concept of the utility model, which shall be regarded as belonging to the utility model and determined by the protection scope of the claims.

Claims

1. A mobile test system compatible with whole machine and local radar scattering characteristic test, characterized in that: it comprises an omnidirectional navigation vehicle, a vertical lifting rod, an azimuth turntable assembly, and a radar system; wherein the omnidirectional navigation vehicle is provided with four sets of Mecanum wheels at the bottom of four corners, and can realize omnidirectional navigation vehicle forward movement, backward movement, in-situ rotation, arbitrary angle winding, and lateral movement; the vertical lifting rod is installed on the omnidirectional navigation vehicle, and can keep the stroke requirement at any position and ensure the safety of the load; the azimuth turntable assembly is installed at the upper end of the vertical lifting rod, and can rotate in the horizontal direction to ensure that the radar antenna is perpendicular to the measured target; an installation surface is arranged outside the azimuth turntable assembly, and the installation surface is used for detachably installing a radar test system, and the radar test system comprises a whole machine test radar system and a local test radar system.

2. The mobile test system according to claim 1, characterized in that: a positioning system is further installed on the omnidirectional navigation vehicle, and the positioning system comprises two positioning antennas arranged at the side of the vehicle and the top of the azimuth turntable assembly; and the omnidirectional navigation vehicle further comprises four sets of servo cylinder support bases.

3. The mobile test system according to claim 1, characterized in that: the vertical lifting rod can be self-locked, and is provided with electrical and mechanical limiting protection functions at the bottom and the top; and the rotation angle range of the azimuth turntable assembly is ±8°, and the accuracy is ±0.1°.

4. The mobile test system according to claim 1, characterized in that: the whole machine test radar system comprises a whole machine test radar host, a whole machine radio frequency front end, and a whole machine antenna group, and is fixedly installed as a whole on the installation surface through a connecting frame structure, wherein the whole machine test radar host is installed inside the connecting frame structure, the connecting frame structure is provided with an antenna installation plate at the front end, the antenna installation plate is provided with the whole machine radio frequency front end on the back surface, and the whole machine antenna group is installed on the antenna installation plate through a lifting module.

5. The mobile test system according to claim 4, characterized in that: the whole machine test radar host comprises one high-stability time base module, three frequency sources and local oscillation sources, two sets of double-channel transceiver assemblies, and one set of multi-channel digital acquisition cards; the whole machine radio frequency front end is internally integrated with a combined power amplifier, a low-noise amplifier, a polarization control unit, and a self-checking unit; and the whole machine antenna group is provided with two sets of each of 1-4GHz, 4-8GHz, 8-12GHz, and 12-18GHz dual-polarized antennas.

6. The mobile test system according to claim 1, characterized in that: the local test radar system comprises a local test radar host and a local electrically scanned antenna array, and is fixedly installed through an adapter tool; the local electrically scanned antenna array is arranged at the front end, and the local test radar host is installed on the adapter tool at the back surface of the local electrically scanned antenna array.

7. The mobile test system according to claim 6, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The local electric scanning antenna array is installed with multiple sets of 4-8GHz and 8-18GHz dual-polarized antennas, internally integrated with a polarization switch and a low-noise amplifier, and integrated with a 4-18GHz power amplifier. The local test radar host computer is integrated with one high-stability time base module, one frequency source and local oscillator source, one 8-channel receiving transceiver component, and one set of multi-channel digital acquisition card.

8. The mobile test system of claim 1, wherein: The mobile test system further comprises a calibration foam support and a calibration ball on the support, wherein the calibration foam support is a circular truncated cone structure, and the calibration ball is arranged at the top end of the calibration foam support.

9. The mobile test system of claim 8, wherein: The calibration ball is made of metal aluminum, and the calibration foam support is made of polystyrene foam.

10. The mobile test system of claim 9, wherein: The mobile test system further comprises a wave-absorbing material with a wedge-shaped tip to shield a strong stray scattering source beside the non-test target.

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