CN116964471A

CN116964471A - Radar test system

Info

Publication number: CN116964471A
Application number: CN202180010352.3A
Authority: CN
Inventors: 侯强; 陈曦; 洪峰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2023-10-27
Also published as: WO2023092432A1

Abstract

A radar testing system (1) comprising a darkroom base (10) and two first rails (20), a radar carrier (30), a corner reflector carrier (40) and a corner reflector (50) arranged in the darkroom base (10), wherein: the two first rails (20) are oppositely arranged and extend in the same direction; the radar bearing device (30) comprises two first driving assemblies (31) and first linear connecting assemblies (321, 322, 323, 324), wherein the two first driving assemblies (31) are respectively assembled on the two first rails (20) in a sliding mode, two ends of each first linear connecting assembly (321, 322, 323, 324) are respectively connected with the two first driving assemblies (31), and each first linear connecting assembly (321, 322, 323, 324) is used for fixing the radar (200) to be detected; the corner reflector (50) is arranged on the corner reflector bearing device (40); the corner reflector bearing device (40) is used for adjusting the position of the corner reflector (50) according to the position of the radar (200) to be tested, so that the corner reflector (50) is aligned with the radar (200) to be tested in the test process of the radar (200) to be tested. The accuracy of the radar test result can be improved.

Description

Radar test system

Technical Field

The application relates to the technical field of radar testing, in particular to a radar testing system.

Background

Before the radar is put into service, various basic performance specification tests are required to be carried out so as to ensure the functional reliability of the radar in practical application. These performance tests are typically performed in a darkroom environment, and to achieve high-precision testing, it is desirable to minimize interference and reflections from high-precision passive simulation targets, radar ends, and the darkroom interior environment. In the prior art, driving and supporting structures are arranged on the periphery of the Lei Daduan and simulation target ends so as to support and adjust the positions, angles and the like of the radar and the simulation target in the testing process. However, these structures in current test systems are often bulky and tend to interfere with the test, thereby affecting the accuracy of the test results.

Disclosure of Invention

The application provides a radar test system for improving the accuracy of radar test results.

In a first aspect, the present application provides a radar test system that may include a darkroom base, a radar carrying device, a corner reflector carrying device, and a corner reflector, the radar carrying device, the corner reflector carrying device, and the corner reflector being disposed within the darkroom base, respectively. Two first rails are arranged in the darkroom base body, are oppositely arranged and extend in the same direction. The radar bearing device comprises two first driving assemblies and a first linear connecting assembly, wherein the two first driving assemblies can be respectively and slidably assembled on the first track, two ends of the first linear connecting assembly can be respectively connected with the two first driving assemblies, and the radar to be tested is fixed on the first linear connecting assembly. The corner reflector is arranged on the corner reflector bearing device, and the corner reflector bearing device can be used for adjusting the position of the corner reflector according to the position of the radar to be tested, so that the corner reflector is aligned to the radar to be tested in the testing process of the radar to be tested.

Compared with a driving and supporting structure with larger volume used in the prior art, the linear connecting piece is used for driving the radar to be tested, and on the premise of realizing multi-degree-of-freedom motion control of the radar to be tested, the linear connecting piece is smaller in volume and does not produce excessive shielding between the corner reflector and the radar to be tested, so that interference generated by irrelevant equipment can be reduced, and the testing precision is improved.

In some alternative embodiments, the first linear connection assembly may comprise four linear connections. The first driving assembly can comprise a base and four winding drums arranged in the base, the base is assembled on the first track in a sliding mode, one ends of the four linear connecting pieces are respectively wound on the four winding drums of one first driving assembly, and the other ends of the four linear connecting pieces are respectively wound on the four winding drums of the other first driving assembly. By controlling the rotation direction of the winding drum, the linear connecting piece can drive the radar to be tested to move along the extending direction of the linear connecting piece.

In some alternative embodiments, the outer wall of the base may also be provided with a drive wheel which is slidingly mounted on the first track.

In some alternative embodiments, the radar to be measured may be fixedly connected to the four linear connectors, respectively. At this time, the linear connecting piece can drive the radar to be tested to realize multidirectional rotary motion by controlling the rotation direction of the winding drum. When specifically setting up, first drive assembly can include the mount that is used for fixed radar to be measured, and mount and four linear connecting pieces are fixed connection respectively.

In some alternative embodiments, it is assumed that the four linear connectors are a first linear connector, a second linear connector, a third linear connector, and a fourth linear connector, respectively, where the first linear connector and the third linear connector, the second linear connector and the fourth linear connector may be arranged along a first direction, the first linear connector and the second linear connector, and the third linear connector and the fourth linear connector are arranged along a second direction, respectively, the first direction is an extension direction of the first rail, and the first direction and the second direction form an included angle. The radar to be tested can be fixedly connected with the third linear connecting piece and the fourth linear connecting piece, at least one linear connecting piece in the first linear connecting piece and the second linear connecting piece can be cut into two parts, a shielding part is connected between the two cut parts, and the shielding part can be made of hydrophilic materials. The shielding part can be used for shielding the radar to be tested.

In some optional embodiments, the shielding part can be made of elastic materials, so that the shielding part can be stretched by controlling the rotation direction of the winding drum, and the thickness of the shielding part is changed, namely the shielding magnitude of the shielding part is changed, and further the performance of the radar to be tested under different shielding magnitudes can be tested.

In some alternative embodiments, the first driving assembly may further include a turntable rotatably disposed in the base around a third direction, and the four reels may be fixed to the turntable, wherein the third direction may be an arrangement direction of the two first rails. By adopting the arrangement, the first linear connecting component can be driven to synchronously rotate by driving the turntable to rotate, so that the rotation of the radar to be detected around the third direction is realized.

In some alternative embodiments, the corner reflector carrier may include two second driving assemblies slidably mounted on the two first rails, respectively, and a second linear connection assembly having two ends connected to the two second driving assemblies, respectively. The second linear connection assembly may be used to fix the corner reflector. The second linear connecting assembly is used for driving the corner reflector, so that the interference generated by irrelevant equipment can be reduced on the premise of realizing the multi-degree-of-freedom motion control of the corner reflector, and the test precision is improved.

It should be noted that, in the present application, the structure of the second driving assembly may be the same as that of the first driving assembly, and repeated description of the structure of the second driving assembly is omitted here.

In some alternative embodiments, it is assumed that the second linear connecting assembly includes a fifth linear connecting member, a sixth linear connecting member, a seventh linear connecting member, and an eighth linear connecting member, wherein the fifth linear connecting member and the sixth linear connecting member, the seventh linear connecting member and the eighth linear connecting member are respectively arranged along a second direction, the fifth linear connecting member and the seventh linear connecting member, the sixth linear connecting member and the eighth linear connecting member are respectively arranged along a first direction, the first direction is an extending direction of the first rail, and the first direction and the second direction form an included angle. At least one corner reflector can be fixed on the second linear connecting component, and one corner reflector is fixedly connected with the fifth linear connecting piece and the seventh linear connecting piece. The second driving component can control the fifth linear connecting piece and the seventh linear connecting piece to drive the corner reflector to realize multidirectional movement and rotary movement.

In some alternative embodiments, the second linear connecting assembly may have two corner reflectors fixed thereon, wherein one corner reflector may be fixedly connected to the fifth and seventh linear connectors, and the other corner reflector may be fixedly connected to the sixth and eighth linear connectors. The second driving component can also control the sixth linear connecting piece and the eighth linear connecting piece to drive the other corner reflector to realize multidirectional movement and rotary movement.

In some alternative embodiments, two second rails may be further disposed in the darkroom base, where the two second rails are disposed opposite to each other and extend along the first direction, and an arrangement direction of the two second rails is disposed at an angle with an arrangement direction of the two first rails, where the first direction is an extension direction of the first rail. The corner reflector bearing device may further include two third driving assemblies and a third linear connection assembly, the two third driving assemblies may be slidably assembled on the second track, and two ends of the third linear connection assembly are connected with the two third driving assemblies, respectively. The third linear connection assembly may also be used to secure the corner reflector. The third linear connecting assembly is used for driving the corner reflector, so that the interference generated by irrelevant equipment can be reduced on the premise of realizing the multi-degree-of-freedom motion control of the corner reflector, and the test precision is improved.

Similarly, the structure of the third driving assembly is the same as that of the first driving assembly in the present application, and the description of the structure of the third driving assembly is not repeated here.

In some alternative embodiments, it is assumed that the third linear connecting assembly may include a nine-wire connecting member, a ten-wire connecting member, an eleven-wire connecting member, and a twelve-wire connecting member, wherein the nine-wire connecting member and the ten-wire connecting member, the eleven-wire connecting member and the twelve-wire connecting member are arranged along a third direction, respectively, and the nine-wire connecting member and the eleven-wire connecting member, the ten-wire connecting member and the twelve-wire connecting member are arranged along a first direction, respectively, the first direction being an extending direction of the first rail, and the third direction being an arrangement direction of the two first rails. At least one corner reflector can be fixed on the third linear connecting component, and one corner reflector is fixedly connected with the nine-line connecting piece and the eleven-line connecting piece. The third driving component can control the nine-line-shaped connecting piece and the eleven-line-shaped connecting piece to drive the corner reflector to realize multidirectional movement and rotational movement.

In some alternative embodiments, the third linear connecting assembly may have two corner reflectors fixed thereon, wherein one corner reflector is fixedly connected with the nine-linear connecting member and the eleven-linear connecting member, and the other corner reflector is fixedly connected with the tenth-linear connecting member and the twelve-linear connecting member. The third driving component can also control the tenth linear connecting piece and the twelfth linear connecting piece to drive the other corner reflector to realize multidirectional movement and rotary movement.

In some alternative embodiments, the radar test system may further include at least one wave absorbing screen disposed in the darkroom base, where the wave absorbing screen may be used to absorb electromagnetic waves emitted by the radar to be tested, and when the radar test system is specifically disposed, the at least one wave absorbing screen may be separately disposed on two sides of the first rail, and the wave absorbing screen is rotationally disposed in the darkroom base around a third direction, where the third direction is an arrangement direction of the two first rails. When the first driving component drives the radar to be detected to move in the extending direction of the first track, the rotating angles of the wave absorbing screens can be adjusted according to the specific positions of the radar to be detected, so that the wave absorbing screens can always face the radar, and the optimal wave absorbing capability of the radar can be exerted.

Drawings

FIG. 1 is a schematic diagram of a radar test system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a radar bearing device according to an embodiment of the present application;

fig. 3 is a schematic partial structure of a radar bearing device according to an embodiment of the present application;

FIG. 4 is a partial side view of a radar bearing device according to an embodiment of the present application;

FIG. 5 is a side view of another portion of a radar bearing device according to an embodiment of the present application;

FIG. 6 is a side view of another portion of a radar bearing device according to an embodiment of the present application;

fig. 7 is a schematic structural view of a corner reflector carrier according to an embodiment of the present application;

FIG. 8 is a partial side view of a first carrier according to an embodiment of the present application;

FIG. 9 is a partial side view of a second carrier according to an embodiment of the present application;

fig. 10 is a top view of a radar test system according to an embodiment of the present application.

Reference numerals:

1-a radar test system; 200-radar to be detected; 10-darkroom base; 20-a first track; 30-radar bearing means;

40-corner reflector carrier means; 50-corner reflectors; 12-a second sidewall; 13-a third sidewall; 14-fourth side wall;

15-a fifth sidewall; 16-sixth side wall; 31-a first drive assembly; 321-line number one; 322-line number two;

323-line number three; 324-line number four; 33-fixing frame; 311-base; 312-driving wheels; 313-a first drive motor;

314-a turntable; 315-a second drive motor; 316-a third drive motor; 34-a shield; 41-a first carrier device;

411-a second drive assembly; 412-line number five; 413-line six; 414-line number seven; 415-eighth line;

50 a-a first corner reflector; 50 b-a second corner reflector; 60-a second track; 42-a second carrier;

421-a third drive assembly; 422-line No. nine; 423-ten lines; 424-eleven lines; 425-twelve lines;

50 c-a third corner reflector; 50 d-fourth corner reflectors; 70-a wave absorbing screen; 71 are slotted.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings. Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise. In addition, the terms "first", "second", etc. referred to in this specification are used for the purpose of distinguishing between descriptions only, and are not to be construed as indicating or implying relative importance, nor as indicating or implying order.

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary.

In the field of vehicles (e.g., passenger vehicles, logistics vehicles, robots, etc.), in order to enable the vehicles to detect road conditions or environments in which they are located, radars may be installed in the vehicles, which may be classified into millimeter wave radars, microwave radars, etc. according to the wavelength of electromagnetic waves emitted. Taking millimeter wave radar as an example, the millimeter wave radar can emit electromagnetic waves (such as electromagnetic waves with the frequency of 30-300 GHz and the wavelength of 1-10 mm) into a road surface or an environment, and can reflect the electromagnetic waves after detecting a target object (such as a road, a pedestrian, a vehicle and the like), and the millimeter wave radar receives the reflected electromagnetic waves, so that the purposes of detecting road conditions or the environment and the like can be realized. For example, after an electromagnetic wave emitted from a millimeter wave radar device in a vehicle detects a human body, the electromagnetic wave is reflected by the human body, the millimeter wave radar device receives the reflected electromagnetic wave, and the distance between the human body and the vehicle can be measured according to the transmission/reception time of the electromagnetic wave.

Before loading, the radar often needs to be tested in various basic performance specifications to ensure the functional reliability of the radar in practical application. Performance testing of radars generally includes testing of horizontal goniometer accuracy, pitch goniometer accuracy, radar cross section (radar cross section, RCS) testing, etc., where radar cross section refers to the ratio of return scattered power per unit solid angle in the radar incidence direction to the power density of a target cutback, a physical quantity used to characterize the degree of return strong wave produced by a target under radar wave illumination, also known as the backscatter cross section. The testing of these parameters depends on the darkroom testing environment based on high-precision passive simulation targets (such as corner reflectors), and to achieve high-precision testing, it is necessary to reduce the interference and reflection of the corner reflector end, the radar end and the darkroom internal environment as much as possible.

In practical application, the periphery of the Lei Daduan and corner reflector ends are provided with driving and supporting structures for supporting and adjusting the positions, angles and the like of the radar and the corner reflector in the testing process. However, these structures in current test systems are often bulky and inevitably interfere with the test, thereby affecting the accuracy of the test results. In addition, due to the limitation of darkroom test cost and space construction size, the wave absorbing device can only be arranged in a limited darkroom space to reduce the reflection of radar waves, for example, a screen made of wave absorbing materials is arranged, but because the position of the screen is fixed, the angle and the distance between the screen and the radar to be tested cannot be changed along with the position of the radar to be tested, so that the reflectivity of the radar waves is difficult to reduce under some test conditions.

In view of the above, the embodiment of the application provides a radar test system, which reduces the interference generated by irrelevant devices on the premise of realizing multi-degree-of-freedom motion control such as movement or deflection of a radar to be tested and a corner reflector by simplifying driving devices of the radar end and the corner reflector end, thereby improving the test precision. In addition, the radar test system can also adjust the angle of the wave-absorbing screen according to the position of the radar to be tested, thereby being beneficial to reducing the reflectivity of radar waves in the test process. The radar test system provided by the embodiment of the application is specifically described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a radar test system according to an embodiment of the present application. Referring to fig. 1, a radar test system 100 according to an embodiment of the present application may include a darkroom base 10, and a first track 20, a radar carrying device 30, a corner reflector carrying device 40, and a corner reflector 50 disposed in the darkroom base 10. The first rail 20 is disposed in the darkroom base 10, and the radar bearing device 30 is slidably disposed on the first rail 20. The radar bearing device 30 may be used for bearing the radar 200 to be tested and driving the radar 200 to be tested to move or deflect along the first track 20 so as to obtain relevant parameters of the radar 200 to be tested under different testing conditions. The corner reflector carrier 40 may be used to carry the corner reflector 50 and drive the corner reflector 50 to move or deflect according to the position of the radar 200 to be tested, so that the corner reflector 50 can be always aligned with the radar 200 to be tested during the test.

In some embodiments, the darkroom base 10 may have a substantially hexahedral structure, including a first sidewall (not shown), a second sidewall 12, a third sidewall 13, a fourth sidewall 14, and a fifth sidewall 15 and a sixth sidewall 16, where the first sidewall and the second sidewall 12 are disposed opposite to each other, and are respectively located at the top and the bottom of the darkroom base 10, so that the first sidewall may also be referred to as a top wall, and the second sidewall 12 may also be referred to as a bottom wall. The third sidewall 13 and the fourth sidewall 14 are respectively connected between the first sidewall 12 and the second sidewall 12, and the third sidewall 13 and the fourth sidewall 14 are disposed opposite to each other. The fifth sidewall 15 and the sixth sidewall 16 are also connected between the first sidewall 12 and the second sidewall 12, respectively, and the fifth sidewall 15 is disposed opposite to the sixth sidewall 16. For convenience of description, the following defines the arrangement direction of the fifth sidewall 15 and the sixth sidewall 16 as a first direction (x direction), the arrangement direction of the third sidewall 13 and the fourth sidewall 14 as a second direction (y direction), and the arrangement direction of the first sidewall and the second sidewall 12 as a third direction (z direction).

The number of the first tracks 20 may be two, the two first tracks 20 may be disposed on the first sidewall and the second sidewall 12, respectively, the two first tracks 20 are disposed opposite to each other along the z direction, and the two first tracks 20 extend along the x direction, respectively. In addition, two first rails 20 may be located at central regions of the first and second sidewalls 12, respectively, in the y-direction. It will be appreciated that in other embodiments, two ends of the first rails 20 may be disposed on the fifth side wall 15 and the sixth side wall 16, respectively, so that the first rails 20 can be fixed in the darkroom base 10 while extending along the x-direction.

Fig. 2 is a schematic structural diagram of a radar bearing device according to an embodiment of the present application, and fig. 3 is a schematic partial structural diagram of a radar bearing device according to an embodiment of the present application. Referring to fig. 2 and 3 together, the radar bearing device 30 may include two first driving assemblies 31 and a first linear connection assembly, where the two first driving assemblies 31 may be slidably disposed on the upper and lower first rails 20, respectively, and the first linear connection assembly is connected between the two first driving assemblies 31. The first linear connection assembly may include a plurality of linear connectors, and the radar 200 to be measured may be fixed to one or more of the linear connectors. In a specific arrangement, the linear connector may be a traction rope, and the cross-sectional shape of the linear connector may be a circle, an angle, a polygon or some other regular or irregular shape, which is not limited in the present application. Because the linear connector has smaller volume, the interference to the radar 200 to be tested is also relatively smaller, thereby being beneficial to improving the accuracy of the test result. In addition, the linear connecting piece can be made of nonmetallic materials, so that interference of the radar to be tested is further reduced.

Illustratively, the number of the linear connectors included in the first linear connector assembly may be four, which are a first linear connector 321, a second linear connector 322, a third linear connector 323, and a fourth linear connector 324, respectively, and hereinafter simply referred to as a first line 321, a second line 322, a third line 323, and a fourth line 324, respectively. The first line 321 and the second line 322, the third line 323 and the fourth line 324 are respectively arranged along the y direction, and the first line 321 and the third line 323, and the second line 322 and the fourth line 324 are respectively arranged along the x direction. Each of the linear connectors may include a first end and a second end, the first end of the linear connector may be connected to the first driving assembly 31 at the top, the second end may be connected to the first driving assembly 31 at the bottom, and the radar 200 to be measured may be fixed between the first end and the second end of the linear connector. In particular, the fixing frame 33 may be disposed on the linear connector, and the radar 200 to be tested may be specifically fixed on the fixing frame 33. Thus, by adjusting the position of the first driving unit 31 and controlling the movement direction of each linear link, the position and angle of the radar 200 to be measured can be adjusted.

In some embodiments, the first driving assembly 31 may include a base 311 and a driving wheel 312 disposed on an outer wall of the base 311, the driving wheel 312 being slidably mounted on the first rail 20. For example, the number of driving wheels 312 may be four, and four driving wheels 312 may be disposed on two sides of the base 311 in the y direction in groups to improve the motion stability of the base 311 on the first track. The first driving motor 313 may be disposed in the base 311, where the first driving motor 313 is in transmission connection with the driving wheels 312 to drive each driving wheel 312 to roll along the first track, so as to drive the first driving assembly 31 to move integrally along the first track 20, and it can be understood that when the upper and lower first driving assemblies 31 move in the same direction and have the same moving speed, the movement of the radar 200 to be measured in the x-axis direction can be realized. It should be noted that, the terms of "top", "bottom", "up", "down" and the like used in the radar test system 100 according to the embodiment of the present application are mainly described according to the display orientation of the radar test system 100 in fig. 1, and do not form a limitation on the orientation of the radar test system 100 in the actual application scenario.

The first driving assembly 31 may further include a turntable 314 disposed in the base 311, where the turntable 314 is rotatably disposed in the base around the z-axis direction. The turntable 314 is provided with reels corresponding to the linear connectors respectively, namely a first reel, a second reel, a third reel and a fourth reel, two ends of a first wire 321 are respectively wound on the first reels of the upper and lower first driving assemblies 31, two ends of a second wire 322 are respectively wound on the second reels of the upper and lower first driving assemblies 31, two ends of a third wire 323 are respectively wound on the third reels of the upper and lower first driving assemblies 31, and two ends of a fourth wire 324 are respectively wound on the fourth reels of the upper and lower first driving assemblies 31.

The second driving motor 315 may be further disposed in the base 311, and the second driving motor 315 may be in transmission connection with the turntable 314, so as to drive the turntable 314 to rotate, thereby driving the four reels to rotate simultaneously, and at this time, the four linear connectors also rotate synchronously. It will be appreciated that when the turntables 314 respectively provided on the upper and lower first driving assemblies 31 rotate in the same direction and have the same rotation speed, the rotation of the radar to be measured around the z-axis can be achieved.

It can be appreciated that the base 311 may further be provided with third driving motors 316 respectively corresponding to the reels, and each third driving motor 316 may respectively drive the corresponding reels to rotate, so that each reel winds or releases the corresponding linear connection member. Referring to fig. 3, fig. 4 and fig. 5 together, fig. 4 is a partial side view of a radar bearing device according to an embodiment of the present application, and fig. 5 is another partial side view of a radar bearing device according to an embodiment of the present application. When the first reel of the first driving assembly 31 at the bottom rotates and releases the first wire 321, and the first reel of the first driving assembly 31 at the top rotates and winds and tightens the first wire 321, the first wire 321 can move along the positive direction of the z-axis; conversely, when the first drum of the bottom first driving unit 31 rotates and winds up the first wire 321 while the first drum of the top first driving unit 31 rotates and releases the first wire 321, the first wire 321 can move in the negative z-axis direction. The motion rules of the second wire 322, the third wire 323 and the fourth wire 324 are similar to those of the first wire 321, and will not be repeated here.

For example, the fixing frame 33 for fixing the radar 200 to be measured may be fixed to four linear connectors respectively, and at this time, when the four linear connectors move in the same direction under the driving action of the third driving motors 316 corresponding to the upper and lower first driving assemblies 31 and have the same moving speed, the movement of the radar 200 to be measured in the z-axis direction may be achieved. When the first wire 321 and the third wire 323 move in the same direction and at the same speed, the second wire 322 and the fourth wire 324 are fixed, or the second wire 322 and the fourth wire 324 move in the same speed in the opposite direction to the first wire 321 and the third wire 323, the rotation of the radar 200 to be measured around the x-axis direction can be realized. When the first wire 321 and the second wire 322 move in the same direction and at the same speed, the third wire 323 and the fourth wire 324 are fixed, or the third wire 323 and the fourth wire 324 move in the same speed in the opposite direction to the first wire 321 and the second wire 322, the rotation of the radar 200 to be measured around the y-axis direction can be realized.

Fig. 6 is another partial side view of a radar bearing device according to an embodiment of the present application. Referring to fig. 6, in this embodiment, the radar 200 to be measured may be fixed to two linear connectors on one side in the x direction, for example, to a first line 321 and a second line 322, or to a third line 323 and a fourth line 324, by a fixing frame 33, and fig. 6 illustrates an example in which the radar 200 to be measured is fixed to the third line 323 and the fourth line 324. At this time, when the radar 200 to be measured is disposed toward the positive x-axis direction, the first line 321 and the second line 322 are located in front of the radar 200 to be measured. It can be appreciated that in this fixed manner, when the upper and lower first driving assemblies 31 move in the same direction along the first track 20 and have the same moving speed, the movement of the radar 200 to be measured in the x-axis direction can be achieved; when the turntables of the upper and lower first driving assemblies 31 rotate in the same direction and have the same rotation speed, the rotation of the radar 200 to be measured around the z-axis direction can be realized; when the third wire 323 and the fourth wire 324 move in the same direction under the driving action of the upper and lower first driving assemblies 31 and have the same moving speed, the movement of the radar 200 to be measured in the z-axis direction can be realized.

In some possible embodiments, line one 321 may be split in the middle and connect the shield 34 at both endpoints of the split. In specific implementation, the shielding portion 34 may be made of a non-metal material, the shielding portion 34 may be made of a hydrophilic material with a hexagonal internal microstructure, and the shielding portion 34 has a certain elasticity. In the initial state, the thickness of the shielding part 34 is relatively thicker, and the shielding magnitude of the radar 200 to be tested is also relatively larger; when the first reels on the upper and lower first driving units 31 rotate and wind and tighten the first wire 321, the first wire 321 is stretched, and thus the shielding portion 34 is correspondingly stretched, at this time, the thickness of the shielding portion 34 in the x-direction is reduced, and the shielding magnitude is also relatively reduced. By controlling the amplitude of rotation of the first spool, a continuous increase or decrease in the thickness of the shield 34 can be achieved. It will be appreciated that in other embodiments, the second wire 322 may be disconnected and provided with the shielding portion 34 in the middle, and the thickness of the shielding portion 34 may be adjusted by controlling the rotation amplitude of the second drums of the upper and lower first driving assemblies, so as to adjust the shielding magnitude of the shielding portion. In the embodiment of the application, on one hand, the test of different radars can be realized under the condition of the shielding parts 34 with the same thickness, and on the other hand, the test of the same radar under the shielding conditions with different shielding orders can be realized by adjusting the thickness of the shielding parts 34.

Fig. 7 is a schematic structural diagram of a corner reflector carrier according to an embodiment of the present application. Referring to fig. 1 and 7 together, in the embodiment of the present application, the corner reflector carrier 40 may include a first carrier 41 slidably disposed on the first rail 20. The first carrying device 41 may include two second driving assemblies 411 and a second linear connecting assembly, where the two second driving assemblies 411 may be slidably disposed on the upper and lower first rails 20, respectively, and the second linear connecting assembly is connected between the two second driving assemblies 411. The second driving assembly 411 has the same structure as the first driving assembly, and thus, the structure thereof will not be repeated here. The number of the second linear connecting members may be four as well, and the four linear connecting members are defined as a fifth linear connecting member 412, a sixth linear connecting member 413, a seventh linear connecting member 414 and an eighth linear connecting member 415, which will be hereinafter abbreviated as a fifth wire 412, a sixth wire 413, a seventh wire 414 and an eighth wire 415, respectively. The fifth wire 412 and the sixth wire 413, the seventh wire 414 and the eighth wire 415 are respectively arranged along the y direction, and the fifth wire 412 and the seventh wire 414, and the sixth wire 413 and the eighth wire 415 are respectively arranged along the x direction. Similarly, the wire-shaped connectors of the first carrying device 41 may be made of non-metallic materials to avoid interference with the radar.

Referring to fig. 7 and fig. 8 together, fig. 8 is a partial side view of a first carrying device according to an embodiment of the present application. In some embodiments, the first carrier 41 may be provided with a first corner reflector 50a, and when implemented, the first corner reflector 50a may be fixed to the fifth wire 412 and the seventh wire 414 by a fixing frame. When the upper and lower second driving assemblies 411 move in the same direction along the first rail 20 and have the same moving speed, the movement of the first corner reflector 50a in the x-axis direction can be achieved; when the turntables of the upper and lower second driving assemblies 411 rotate in the same direction and have the same rotation speed, the rotation of the first corner reflector 50a about the z-axis can be achieved; when the fifth wire 412 and the seventh wire 414 move in the same direction under the driving action of the upper and lower second driving assemblies 411 and have the same moving speed, the movement of the first corner reflector 50a in the z-axis direction can be realized; when the fifth wire 412 and the seventh wire 414 are moved in opposite directions by the driving of the upper and lower second driving assemblies 411, the rotation of the first corner reflector 50a about the y-axis direction can be achieved. It can be appreciated that the purpose of the first corner reflector rotating around the y-axis direction is to align the center of the radar to be tested in the pitch dimension, thereby ensuring the accuracy of the test result.

As a possible embodiment, the first carrying device 41 may further be provided with a second corner reflector 50b, and in a specific implementation, the second corner reflector 50b may be fixed to the sixth wire 413 and the eighth wire 415 by a fixing frame. At this time, the movement of the second corner reflector 50b in the x-axis direction and the z-axis direction and the rotation about the y-axis direction and the z-axis direction can be respectively realized by the driving of the upper and lower second driving units 411, and the specific driving process is similar to that of the first corner reflector 50a and will not be repeated here.

It should be noted that, in the embodiment of the present application, the single-target simulation test of the radar to be tested, including the distance precision, the angle precision, and the RCS precision, may be implemented by using the first corner reflector 50a or the second corner reflector 50b alone, and the longitudinal (i.e., z-direction) double-target simulation test, including the vertical angle resolution test, the vertical angle RCS resolution test, and the like, may be implemented by using the first corner reflector 50a and the second corner reflector 50 b.

With continued reference to fig. 1 and 7, in some possible embodiments, a second rail 60 may be disposed within the darkroom base 10, the second rail 60 extending in the x-direction. The number of the second rails 60 may be two, and the two second rails 60 may be disposed on the third sidewall 13 and the fourth sidewall 14, respectively, and the two second rails 60 are disposed opposite to each other along the y direction. In addition, two second rails 60 may be located at the central regions of the third and fourth sidewalls 13 and 14, respectively, in the z-direction. It will be appreciated that in other embodiments, two ends of the second rails 60 may be disposed on the fifth side wall 15 and the sixth side wall 16, respectively, so that the second rails 60 can be fixed in the darkroom base 10 while extending along the x-direction.

The corner reflector carrier 40 may further include a second carrier 42 slidably disposed on the second rail 60. The second carrying device 42 may include two third driving assemblies 421 and a third linear connection assembly, where the two third driving assemblies 421 may be slidably disposed on the left and right second rails 60, respectively, and the third linear connection assembly is connected between the two third driving assemblies 421. The third driving assembly 421 has the same structure as the first driving assembly, and thus the description thereof will not be repeated here. The number of the third linear connecting members may be four as well, and the four linear connecting members are defined as a nine-wire connecting member 422, a ten-wire connecting member 423, an eleven-wire connecting member 424, and a twelve-wire connecting member 425, which are hereinafter abbreviated as a nine-wire 422, a ten-wire 423, an eleven-wire 424, and a twelve-wire 425, respectively. The ninth wire 422 and the tenth wire 423, the eleventh wire 424 and the twelfth wire 425 are respectively arranged along the z direction, and the ninth wire 422 and the eleventh wire 424, and the tenth wire 423 and the twelfth wire 425 are respectively arranged along the x direction. Similarly, the wire-shaped connectors of the second carrier device 42 may also be made of a non-metallic material to avoid interference with the radar.

Referring to fig. 7 and fig. 9 together, fig. 9 is a partial side view of a second carrying device according to an embodiment of the present application. In some embodiments, the third corner reflector 50c may be disposed on the second carrying device 42, and in implementation, the third corner reflector 50c may be fixed to the line nine 422 and the line eleven 424 by a fixing frame. When the left and right third driving assemblies 421 move in the same direction along the second rail 60 and have the same moving speed, the movement of the third corner reflector 50c in the x-axis direction can be achieved; when the turntables of the left and right third driving assemblies 421 are rotated in the same direction and have the same rotation speed, the rotation of the third corner reflector 50c about the y-axis can be achieved; when the line No. 422 and the line No. 424 move in the same direction under the driving action of the left and right third driving assemblies 421 and have the same moving speed, the movement of the third corner reflector 50c in the y-axis direction can be realized; when the line No. 422 and the line No. 424 are moved in opposite directions by the driving of the left and right third driving units 421, the rotation of the third corner reflector 50c about the z-axis direction can be achieved. It will be appreciated that the purpose of rotation of the third corner reflector 50c about the z-axis is to align the centre of the radar to be tested in the azimuth dimension, thereby ensuring the accuracy of the test results.

As a possible embodiment, the second carrying device 42 may further be provided with a fourth corner reflector 50d, and in a specific implementation, the fourth corner reflector 50d may be fixed to the tenth wire 423 and the twelfth wire 425 by a fixing frame. At this time, the movement of the fourth corner reflector 50d in the x-axis direction and the y-axis direction and the rotation about the y-axis direction and the x-axis direction can be respectively realized by the driving of the left and right third driving assemblies 421, and the specific driving process is similar to that of the third corner reflector 50c and is not repeated here.

In the embodiment of the present application, single-target simulation test of the radar to be tested, including distance accuracy, angle accuracy and RCS accuracy, can be realized by using the third corner reflector 50c or the fourth corner reflector 50d alone, while lateral (i.e., y-direction) double-target simulation test, including horizontal angle resolution test, horizontal angle RCS resolution test, etc., can be realized by using the third corner reflector 50c and the fourth corner reflector 50 d.

Referring to fig. 1 again, in some possible embodiments, the third side wall 13 and the fourth side wall 14 of the darkroom base 10 may be further provided with a wave-absorbing screen 70, and the wave-absorbing screen 70 may be made of a flame-retardant nonmetallic foam material for absorbing the beam of the radar emission 200 to be tested, so as to reduce the reflectivity of the radar wave and improve the test accuracy. In a specific arrangement, the number of the wave absorbing screens 70 may be plural, and in fig. 1, four wave absorbing screens 70 are illustrated as being respectively provided on the third side wall 13 and the fourth side wall 14, and the four wave absorbing screens on the third side wall 13 and the fourth side wall 14 may be respectively arranged along the x direction.

Since the radar has different far-near field test requirements, the distance between the radar 200 to be tested and the target, that is, the distance between the radar 200 to be tested and the corner reflector 50, needs to be adjusted according to different test requirements in the test process. The wave absorbing material has the optimal requirement of the incident angle, and the wave absorbing performance is optimal when the electromagnetic wave is vertically incident. In order for each of the wave absorbing screens 70 to exert its optimal wave absorbing capacity, in the embodiment of the present application, each of the wave absorbing screens 70 on the side of the third side wall 13 may be rotatably connected to the third side wall 13 in the z-axis direction, and each of the wave absorbing screens 70 on the side of the fourth side wall 14 may be rotatably connected to the fourth side wall 14. The darkroom base 10 can be further provided with fourth driving motors corresponding to the wave-absorbing screens 70 one by one, the fourth driving motors can be used for driving the corresponding wave-absorbing screens 70 to rotate, and when the radar 200 to be tested moves along the x-axis direction under the driving action of the radar bearing device 30, the rotation angles of the wave-absorbing screens 70 can be adjusted through the fourth driving motors, so that the wave-absorbing screens 70 can always face the radar 200 to be tested.

It should be noted that, on one side of the third sidewall 13, the positions of the wave absorbing screens 70 corresponding to the second tracks 60 on the third sidewall 13 may be respectively provided with slots 71 to avoid the third driving component 421 on the left side; on the side of the fourth side wall 14, a slot 71 may be disposed on each of the wave absorbing screens 70 at a position corresponding to the second track 60 on the fourth side wall 14, so as to avoid the third driving component 421 on the right side. When the third driving assembly 421 moves along the x-direction and passes through the screen 70, the screen 70 may be rotated in advance to an angle parallel to the third sidewall 13 or the fourth sidewall 14, so that the third driving assembly 421 can slide through the screen through the slot on the screen.

Fig. 10 is a top view of a radar test system according to an embodiment of the present application. Referring to fig. 10, when the radar to be measured moves along the positive x-axis direction under the driving action of the radar bearing device, each of the wave-absorbing screens 70 on one side of the third side wall 13 may rotate counterclockwise under the action of the corresponding fourth driving motor, and each of the wave-absorbing screens 70 on one side of the fourth side wall 14 may rotate clockwise under the action of the corresponding fourth driving motor, so that each of the wave-absorbing screens 70 is opposite to the beam emitted by the radar to be measured 200. When the radar 200 to be tested moves along the negative x-axis direction under the driving action of the radar bearing device, each wave-absorbing screen 70 on one side of the third side wall 13 can rotate clockwise under the action of the corresponding fourth driving motor, and each wave-absorbing screen 70 on one side of the fourth side wall 14 can rotate anticlockwise under the action of the corresponding fourth driving motor, so that each wave-absorbing screen 70 faces to the beam emitted by the radar 200 to be tested.

Along the positive x direction, four absorbing screens 70 on the third side wall 13 and the fourth side wall 14 are defined as a first screen W1, a second screen W2, a third screen W3 and a fourth screen W4 in this order, and the changing angle of the screens will be described below taking the first screen W1 of the third side wall 13 as an example. Assuming that the width (Y-direction dimension) of the darkroom base 10 is L1, the length (X-direction dimension) of the darkroom base 10 is L2, the real-time coordinates of the center point of the radar 200 to be measured are O1 (X0, Y0), the coordinates of the hinge point of the first-stage screen W1 and the third side wall 13 are E (Xe, ye), the coordinates of the center point of the first-stage screen W1 are E1 (Xe 1, ye 1), and when [ E1E ] is satisfied between E1E, E O1 and EO1 ] ² +[E1O1] ² ＝[EO1] ² When the included angle E-E1-O1 is a right angle, the beam emitted by the radar 200 to be detected can vertically enter the first-stage screen W1, and at the moment, the rotation angle alpha=180 DEG-angle E1-E-O1-angle H-E-O1 of the first-stage screen W1 relative to the third side wall 13, wherein the angle ise1-E-o1=arccoss (E1E/EO 1), and +.h-E-o1=arccoss (EH/EO 1). Similarly, the rotation angles of the second screen W2, the third screen W3 and the fourth screen W4 can also be calculated according to the above method, and will not be described here again.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

The utility model provides a radar test system which characterized in that, includes darkroom base member and set up in two first tracks in the darkroom base member, radar loading attachment, corner reflector loading attachment and corner reflector, wherein:

the two first rails are oppositely arranged and extend in the same direction;

the radar bearing device comprises two first driving assemblies and a first linear connecting assembly, wherein the two first driving assemblies are respectively and slidably assembled on the two first rails, two ends of the first linear connecting assembly are respectively connected with the two first driving assemblies, and the first linear connecting assembly is used for fixing the radar to be detected;

The corner reflector is arranged on the corner reflector bearing device;

the corner reflector bearing device is used for adjusting the position of the corner reflector according to the position of the radar to be tested, so that the corner reflector is aligned to the radar to be tested in the testing process of the radar to be tested.
The radar test system of claim 1, wherein the first linear connection assembly comprises four linear connections;

the first driving assembly comprises a base and four winding drums arranged in the base, the base is assembled on the first track in a sliding mode, one ends of the four linear connecting pieces are respectively wound on the four winding drums of one first driving assembly, and the other ends of the four linear connecting pieces are respectively wound on the four winding drums of the other first driving assembly.
The radar testing system of claim 2, wherein the radar under test is fixedly connected to each of the four linear connectors.
The radar test system of claim 2, wherein the four linear connectors are a first linear connector, a second linear connector, a third linear connector, and a fourth linear connector, respectively, the first linear connector and the third linear connector, the second linear connector and the fourth linear connector are arranged along a first direction, and the first linear connector and the second linear connector, the third linear connector and the fourth linear connector are arranged along a second direction, the first direction is an extending direction of the first rail, and the first direction and the second direction form an included angle;

The radar to be tested is fixedly connected with the third linear connecting piece and the fourth linear connecting piece, at least one linear connecting piece in the first linear connecting piece and the second linear connecting piece is cut off into two parts, a shielding part is connected between the two cut-off parts, and the shielding part is made of hydrophilic materials.
The radar testing system of claim 4, wherein the shroud is resilient.
The radar testing system of any one of claims 2-5, wherein the first drive assembly further comprises a turntable rotatably disposed within the base about a third direction, four of the reels being secured to the turntable;

the third direction is the arrangement direction of the two first tracks.
The radar test system according to any one of claims 1 to 6, wherein the corner reflector carrier comprises two second driving assemblies and a second linear connecting assembly, the two second driving assemblies are slidably assembled to the two first rails respectively, and two ends of the second linear connecting assembly are connected to the two second driving assemblies respectively;

the second linear connection assembly is used for fixing the corner reflector.
The radar test system of claim 7, wherein the second linear connector assembly includes a fifth linear connector, a sixth linear connector, a seventh linear connector, and an eighth linear connector, the fifth linear connector and the sixth linear connector, the seventh linear connector and the eighth linear connector being arranged along a second direction, the fifth linear connector and the seventh linear connector, the sixth linear connector and the eighth linear connector being arranged along a first direction, the first direction being an extension direction of the first rail, and the first direction being disposed at an angle to the second direction;

the second linear connecting assembly is fixedly provided with at least one corner reflector, and one corner reflector is fixedly connected with the fifth linear connecting piece and the seventh linear connecting piece.
The radar test system of claim 8, wherein the second linear connection assembly is fixedly provided with two of the corner reflectors, and the other of the corner reflectors is fixedly connected with the sixth linear connection member and the eighth linear connection member.
The radar test system according to any one of claims 1 to 9, wherein two second rails are arranged in the darkroom base body in an opposite manner, the two second rails extend along a first direction, an arrangement direction of the two second rails and an arrangement direction of the two first rails form an included angle, and the first direction is an extension direction of the first rails;

The corner reflector bearing device comprises two third driving assemblies and a third linear connecting assembly, the two third driving assemblies are respectively and slidably assembled on the second track, and two ends of the third linear connecting assembly are respectively connected with the two third driving assemblies;

the third linear connection assembly is used for fixing the corner reflector.
The radar test system of claim 10, wherein the third linear connector assembly includes a nine-wire connector, a ten-wire connector, an eleven-wire connector, and a twelve-wire connector, the nine-wire connector and the ten-wire connector, the eleven-wire connector and the twelve-wire connector being aligned in a third direction, the nine-wire connector and the eleven-wire connector, the eleven-wire connector and the twelve-wire connector being aligned in a first direction, the first direction being an extension direction of the first rail, the third direction being an alignment direction of the two first rails;

the third linear connecting assembly is fixedly provided with at least one corner reflector, and one corner reflector is fixedly connected with the nine-number linear connecting piece and the eleven-number linear connecting piece.
The radar test system of claim 11, wherein the third linear connection assembly has two of the corner reflectors fixed thereto, and the other of the corner reflectors is fixedly connected to the ten-gauge linear connection member and the twelve-gauge linear connection member.
The radar test system according to any one of claims 1 to 12, further comprising at least one wave absorbing screen disposed in the darkroom base, the wave absorbing screen being configured to absorb electromagnetic waves emitted by the radar to be tested, at least one wave absorbing screen being disposed on both sides of the first track, and the wave absorbing screen being rotatably disposed in the darkroom base around a third direction;

the third direction is the arrangement direction of the two first tracks.