CN102841265B - Three-dimensional high-precision fully-automatic ultra-high frequency band radar antenna near-field testing system - Google Patents
Three-dimensional high-precision fully-automatic ultra-high frequency band radar antenna near-field testing system Download PDFInfo
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Abstract
The invention discloses a three-dimensional high-precision fully-automatic ultra-high frequency band radar antenna near-field testing system which comprises a mounting base (1), a Y-axis positioning component and an XZ planar positioning system, wherein the Y-axis positioning component comprises a Y-axis ball screw component, a Y-axis ball linear sliding rail (2), a Y-axis leveling connection planker (3) and an antenna mounting supporting seat (6); an X-axis automatic positioning component comprises an X-axis ball screw component, an X-axis ball linear sliding rail (10), an X-axis leveling connection planker (11), an X-axis drive servo motor (12) and an X-axis grating ruler (13); and a Z-axis automatic positioning component comprises a single-axis robot (17), a test sensor mounting bracket (18), a Z-axis grating ruler (19), a Z-axis gravity center adjusting back frame (20) and a Z-axis drive servo motor (21). The system has the advantages of high integration degree, high precision, small scattering, small size and light weight, convenience for use and maintenance, low cost and capability of meeting test requirements of small-sized antennae.
Description
Technical field
The present invention relates to the full-automatic hyper band radar antenna of a kind of three-dimensional high-precision near-field test system.
Background technology
Antenna near-field test is carried out in microwave dark room, and its precision is high, efficiency is high, cost is low, and the application in antenna measurement is more and more extensive.Antenna near-field test macro mainly comprises antenna to be measured and probe system, antenna to be measured and probe positioning system, test data collection and disposal system.Wherein, antenna to be measured and the Key Platform of probe positioning system as antenna near-field test, its locator meams and precision are determining the precision of antenna measurement result.The key technical indexes of antenna to be measured and probe positioning system is exactly its positioning precision: relative positional accuracy between plane of orientation degree, repetitive positioning accuracy and the antenna of probe and probe.At present, the unit of domestic researching antenna near-field test platform is mainly some colleges and universities and research institute, as Xian Electronics Science and Technology University, BJ University of Aeronautics & Astronautics and middle electric 14, their product orientation flatness can reach about 0.08mm, assist with the optimization of control system is the highest and can be reached 0.04mm by laser tracker.But mostly adopt column foot formula structure, bulky, integrated degree is not high, complex structure, inconvenience paste absorbing material to reduce the test platform scattering impact on test result, is generally only applicable to the test of Large Radar Antenna.And their product positioning system (can be called again scanning support or sampling rack) of generally just popping one's head in, antenna-positioning system and probe positioning system are not integrated on a platform, use limitation larger, it is not too convenient to use.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, provide a kind of and adopt closed loop automatic control system to realize hi-Fix, positioning precision is high, whole platform microwave " zero " scattering, the impact of greatly lower microwave scattering on near-field test precision, integrated degree is high, volume is little, lightweight, operation and maintenance is the full-automatic hyper band radar antenna of low cost three-dimensional high-precision near-field test system easily.
The object of the invention is to be achieved through the following technical solutions: the full-automatic hyper band radar antenna of three-dimensional high-precision near-field test system, it comprises mounting base, Y-axis positioning component and XZ plane positioning system, Y-axis positioning component comprises Y-axis ball screw assembly, Y-axis rolling ball linear slide rail, the slide block group a matching with Y-axis rolling ball linear slide rail, Y-axis leveling connects planker, Y-axis scale and antenna erection support, Y-axis ball screw assembly comprises Y-axis ball screw, the Y-axis feed screw nut and the Y-axis screw mandrel bearing that match with Y-axis ball screw, Y-axis feed screw nut is fixedly mounted on Y-axis leveling and connects on planker, the top of Y-axis ball screw is flexibly connected with Y-axis screw mandrel bearing through Y-axis feed screw nut, Y-axis screw mandrel bearing is fixedly mounted on mounting base, two Y-axis rolling ball linear slide rails are fixedly mounted on respectively on mounting base, Y-axis scale is parallel to Y-axis rolling ball linear slide rail and is arranged on mounting base, antenna erection support is fixedly mounted on the upper plane that Y-axis leveling connects planker, and Y-axis leveling connects the lower plane of planker slide block group a is installed, XZ plane positioning system is made up of the automatic positioning component of X-axis and the automatic positioning component of Z axis, the automatic positioning component of X-axis comprises X-axis ball screw assembly, X-axis rolling ball linear slide rail, the slide block group b matching with X-axis rolling ball linear slide rail, X-axis leveling connects planker, X-axis drives servomotor and X-axis grating scale, X-axis ball screw assembly comprises X-axis ball screw, the X-axis feed screw nut and the X-axis screw mandrel bearing that match with X-axis ball screw, X-axis feed screw nut is fixedly mounted on X-axis leveling and connects on planker, one end of X-axis ball screw connects X-axis by shaft coupling and drives servomotor, the other end is flexibly connected with X-axis screw mandrel bearing through X-axis feed screw nut, X-axis screw mandrel bearing is fixedly mounted on mounting base, two X-axis rolling ball linear slide rails are fixedly mounted on respectively on mounting base, and X-axis grating scale is parallel to X-axis rolling ball linear slide rail and is arranged on mounting base, and X-axis leveling connects the lower plane of planker slide block group b is installed, the automatic positioning component of Z axis comprises that single shaft robot, testing sensor mounting bracket, Z axis grating scale, Z axis centre of gravity adjustment backrest and Z axis drive servomotor, the automatic positioning component of Z axis is fixedly installed in by Z axis centre of gravity adjustment backrest the upper plane that X-axis leveling connects planker, one end of single shaft robot connects Z axis by shaft coupling and drives servomotor, single shaft robot is fixedly mounted in Z axis centre of gravity adjustment backrest, testing sensor mounting bracket is fixedly mounted on the slide block of single shaft robot, and Z axis grating scale is parallel to single shaft robot and is arranged in Z axis centre of gravity adjustment backrest.
The end of Y-axis ball screw is connected or is connected with servomotor by shaft coupling with operation handwheel.
The outside surface of mounting base, Y-axis positioning component, the automatic positioning component of X-axis and the automatic positioning component of Z axis all attaches absorbing material.
The invention has the beneficial effects as follows:
(1) utilize Integration Design thought, adopt cast iron platform as mounting base, select highly integrated high precision ball linear slide rail and high precision ball screw mandrel composition X, y-axis shift actuation mechanism, as Z axis travel mechanism, realize the running fix on X, Y, tri-direction of principal axis of Z with highly integrated single shaft robot;
(2) Y-axis both can adopt manual control also can adopt automatic control mode according to requirements, and the present invention can adopt manual control mode according to requirements, and the walking depth of parallelism reaches 0.05mm;
(3) X, Z axis adopt closed loop automatic control system to realize hi-Fix, and XZ plane of orientation degree is less than 0.05mm, and repetitive positioning accuracy reaches 0.01mm;
(4) adopt Stealth shape designing technique, reduce the cross section of platform in microwave direction, whole platform surface is designed to regular planar as far as possible so that attach absorbing material simultaneously, thereby realize microwave " zero " scattering of whole platform, greatly reduced the impact of microwave scattering on near-field test precision;
(5) the integrated degree of whole test macro is high, and precision is high, scattering is little, volume is little lightweight, and working service is convenient, and cost is low, meets the test request of the following small size antenna of 50GHz.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
In figure, 1-mounting base, 2-Y axle rolling ball linear slide rail, the leveling of 3-Y axle connects planker, 4-operates handwheel, 5-Y axle scale, 6-antenna erection support, 7-Y shaft ball screw, 8-Y axial filament stem nut, 9-Y axial filament rod bearing, 10-X axle rolling ball linear slide rail, the leveling of 11-X axle connects planker, 12-X axle drives servomotor, 13-X axle grating scale, 14-X shaft ball screw, 15-X-axis feed screw nut, 16-X axial filament rod bearing, 17-single shaft robot, 18-testing sensor mounting bracket, 19-Z axle grating scale, 20-Z axle centre of gravity adjustment backrest, 21-Z axle drives servomotor, 22-slide block.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, the full-automatic hyper band radar antenna of three-dimensional high-precision near-field test system, it comprises mounting base 1, Y-axis positioning component and XZ plane positioning system, mounting base 1 is " T " font, integral casting forming, mounting base 1 upper surface is installed the precise ball linear slide rail of X, Y-axis, and flatness requires very high, so the processing such as scraped and ensured the requirement of its flatness by grinding and shovel.The outside surface of mounting base 1, Y-axis positioning component and XZ plane positioning system all attaches absorbing material.
Y-axis positioning component comprises Y-axis ball screw assembly, Y-axis rolling ball linear slide rail 2, the slide block group a matching with Y-axis rolling ball linear slide rail 2, Y-axis leveling connects planker 3, Y-axis scale 5 and antenna erection support 6, Y-axis ball screw assembly comprises Y-axis ball screw 7, the Y-axis feed screw nut 8 and the Y-axis screw mandrel bearing 9 that match with Y-axis ball screw 7, Y-axis feed screw nut 8 is mounted by means of bolts on Y-axis leveling and connects on planker 3, the top of Y-axis ball screw 7 is flexibly connected with Y-axis screw mandrel bearing 9 through Y-axis feed screw nut 8, the end of Y-axis ball screw 7 is connected or is connected with servomotor by shaft coupling with operation handwheel 4, this programme adopts the mode of attended operation handwheel 4, adopt the mode of artificial rotation operation handwheel 4 to control.Y-axis screw mandrel bearing 9 is mounted by means of bolts on mounting base 1; Two Y-axis rolling ball linear slide rails 2 are mounted by means of bolts on respectively on mounting base 1, Y-axis scale 5 is parallel to Y-axis rolling ball linear slide rail 2 and sticks on mounting base 1, antenna erection support 6 is mounted by means of bolts on the upper plane that Y-axis leveling connects planker 3, and Y-axis leveling connects the lower plane of planker 3 slide block group a is installed.Operate handwheel 4 by rotation Y-axis ball screw 7 is rotated, drive Y-axis feed screw nut 8 to move along a straight line, thereby drive Y-axis rolling ball linear slide rail 2, Y-axis leveling connection planker 3 and antenna erection support 6 entirety to move along Y direction.
XZ plane positioning system is made up of the automatic positioning component of X-axis and the automatic positioning component of Z axis, and location stroke range is 800mm × 800mm.The automatic positioning component of X-axis comprises X-axis ball screw assembly, X-axis rolling ball linear slide rail 10, the slide block group b matching with X-axis rolling ball linear slide rail 10, X-axis leveling connects planker 11, X-axis drives servomotor 12 and X-axis grating scale 13, X-axis ball screw assembly comprises X-axis ball screw 14, the X-axis feed screw nut 15 and the X-axis screw mandrel bearing 16 that match with X-axis ball screw 14, X-axis feed screw nut 15 is mounted by means of bolts on X-axis leveling and connects on planker 11, one end of X-axis ball screw 14 connects X-axis by shaft coupling and drives servomotor 12, the other end is flexibly connected with X-axis screw mandrel bearing 16 through X-axis feed screw nut 15, X-axis screw mandrel bearing 16 is mounted by means of bolts on mounting base 1, two X-axis rolling ball linear slide rails 10 are mounted by means of bolts on respectively on mounting base 1, X-axis grating scale 13 is parallel to X-axis rolling ball linear slide rail 10 and sticks on mounting base 1, X-axis leveling connects the lower plane of planker 11 slide block group b is installed, and slide block group a and slide block group b form by four slide blocks that are arranged on leveling by bolt and are connected four corners of planker lower plane.The automatic positioning component of Z axis comprises single shaft robot 17, testing sensor mounting bracket 18, Z axis grating scale 19, Z axis centre of gravity adjustment backrest 20 and Z axis drive servomotor 21, the automatic positioning component of Z axis is fixedly installed in by Z axis centre of gravity adjustment backrest 20 the upper plane that X-axis leveling connects planker 11, one end of single shaft robot 17 connects Z axis by shaft coupling and drives servomotor 21, single shaft robot 17 is fixedly mounted in Z axis centre of gravity adjustment backrest 20, testing sensor mounting bracket 18 is fixedly mounted on the slide block 22 of single shaft robot 17, Z axis grating scale 19 is parallel to single shaft robot 17 and is arranged in Z axis centre of gravity adjustment backrest 20.
Control system forms closed-loop control system by servomotor, servo driving, PLC controller, position feedback grating scale, can reach the in-placing precision of 0.01mm.Between control system and host computer, can realize connecting communication by Ethernet serial communication interface.Whole control system both can be carried out fast moving control by handheld box, also can be undertaken accurately controlling in real time by upper computer software, convenient test coordinate acquisition data.Between control system and host computer, connecting communication is convenient, and extensibility is strong, is beneficial to the test according to reality and need to carries out subsequent development.The flatness of XZ plane of orientation, antenna erection support 6 has conclusive impact on electromagnetic scattering to the precision of antenna near-field test result along the walking depth of parallelism and the whole platform of Y-axis, by adopting the high integrated driving of above-mentioned high precision, guidance set, closed-loop control system, reasonably structural design and anti-scatter measure, realize XZ plane of orientation degree and be less than 0.05mm, repetitive positioning accuracy is less than 0.01mm, the Y-axis walking depth of parallelism is less than the accuracy requirement of 0.05mm and the requirement towards electromagnetic wave direction " zero " scattering, meet the small size antenna near-field test requirement below 50GHz.
Claims (3)
1. the full-automatic hyper band radar antenna of three-dimensional high-precision near-field test system, it is characterized in that: it comprises mounting base (1), Y-axis positioning component and XZ plane positioning system, Y-axis positioning component comprises Y-axis ball screw assembly, Y-axis rolling ball linear slide rail (2), the slide block group a matching with Y-axis rolling ball linear slide rail (2), Y-axis leveling connects planker (3), Y-axis scale (5) and antenna erection support (6), Y-axis ball screw assembly comprises Y-axis ball screw (7), the Y-axis feed screw nut (8) and the Y-axis screw mandrel bearing (9) that match with Y-axis ball screw (7), Y-axis feed screw nut (8) is fixedly mounted on Y-axis leveling and connects on planker (3), the top of Y-axis ball screw (7) is flexibly connected with Y-axis screw mandrel bearing (9) through Y-axis feed screw nut (8), Y-axis screw mandrel bearing (9) is fixedly mounted on mounting base (1), two Y-axis rolling ball linear slide rails (2) are fixedly mounted on respectively on mounting base (1), Y-axis scale (5) is parallel to Y-axis rolling ball linear slide rail (2) and is arranged on mounting base (1), antenna erection support (6) is fixedly mounted on the upper plane that Y-axis leveling connects planker (3), and Y-axis leveling connects the lower plane of planker (3) slide block group a is installed,
XZ plane positioning system is made up of the automatic positioning component of X-axis and the automatic positioning component of Z axis, the automatic positioning component of X-axis comprises X-axis ball screw assembly, X-axis rolling ball linear slide rail (10), the slide block group b matching with X-axis rolling ball linear slide rail (10), X-axis leveling connects planker (11), X-axis drives servomotor (12) and X-axis grating scale (13), X-axis ball screw assembly comprises X-axis ball screw (14), the X-axis feed screw nut (15) and the X-axis screw mandrel bearing (16) that match with X-axis ball screw (14), X-axis feed screw nut (15) is fixedly mounted on X-axis leveling and connects on planker (11), one end of X-axis ball screw (14) connects X-axis by shaft coupling and drives servomotor (12), the other end is flexibly connected with X-axis screw mandrel bearing (16) through X-axis feed screw nut (15), X-axis screw mandrel bearing (16) is fixedly mounted on mounting base (1), two X-axis rolling ball linear slide rails (10) are fixedly mounted on respectively on mounting base (1), X-axis grating scale (13) is parallel to X-axis rolling ball linear slide rail (10) and is arranged on mounting base (1) above, and X-axis leveling connects the lower plane of planker (11) slide block group b is installed,
The automatic positioning component of Z axis comprises single shaft robot (17), testing sensor mounting bracket (18), Z axis grating scale (19), Z axis centre of gravity adjustment backrest (20) and Z axis drive servomotor (21), the automatic positioning component of Z axis is fixedly installed in by Z axis centre of gravity adjustment backrest (20) the upper plane that X-axis leveling connects planker (11), one end of single shaft robot (17) connects Z axis by shaft coupling and drives servomotor (21), single shaft robot (17) is fixedly mounted in Z axis centre of gravity adjustment backrest (20), testing sensor mounting bracket (18) is fixedly mounted on the slide block (22) of single shaft robot (17), Z axis grating scale (19) is parallel to single shaft robot (17) and is arranged in Z axis centre of gravity adjustment backrest (20).
2. the full-automatic hyper band radar antenna of three-dimensional high-precision according to claim 1 near-field test system, is characterized in that: the end of described Y-axis ball screw (7) is connected or is connected with servomotor by shaft coupling with operation handwheel (4).
3. the full-automatic hyper band radar antenna of three-dimensional high-precision according to claim 1 near-field test system, is characterized in that: the outside surface of described mounting base (1), Y-axis positioning component, the automatic positioning component of X-axis and the automatic positioning component of Z axis all attaches absorbing material.
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