CN112505603A

CN112505603A - Device for compact range feed source polarization calibration

Info

Publication number: CN112505603A
Application number: CN202011262348.XA
Authority: CN
Inventors: 姜涌泉; 莫崇江; 陈文强
Original assignee: Beijing Institute of Environmental Features
Current assignee: Beijing Institute of Environmental Features
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-03-16
Anticipated expiration: 2040-11-12
Also published as: CN112505603B

Abstract

The invention relates to a device for compact range feed source polarization calibration, which comprises a bracket, a stabilizing box, an adjusting box, a feed source, a phase indicator, an adjuster and a pitching indicator, wherein the stabilizing box is fixedly connected at one end of the bracket, the adjusting box is fixedly connected at one side of the stabilizing box, the feed source is erected on the adjusting box, the phase indicator is erected at one side of the adjusting box, the adjuster is erected at the other end of the bracket, the pitching indicator is erected at one side of the adjuster, the phase position indicator has the advantages that the compact range cross polarization characteristic completely meets the actual test requirement, and the test precision meets the specified requirement.

Description

Device for compact range feed source polarization calibration

Technical Field

The invention relates to the technical field of electromagnetic measurement, in particular to equipment for compact range feed source polarization calibration.

Background

The feed source is one of core devices of a compact range, and the electromagnetic performance of the feed source directly determines the accuracy of a test result of an object to be tested in a dead zone. Before the feed source object is processed, the feed source is required to be designed in a customized mode according to the existing reflecting surface so as to ensure that the compact range can operate in the optimal state. However, in the process of installation and debugging of a feed source object obtained according to a customized design, the situation that cross polarization characteristics of a dead zone are unstable and even extremely worsen can occur, and the normal development of related tests of a compact range is seriously influenced.

The feed source object is usually installed on the feed source support in front of the reflecting surface, and the actual installation and debugging process usually only has the requirements of a phase center and a feed source elevation angle, namely, the phase center of the feed source is just positioned on the focus of the reflecting surface through a corresponding adjusting mechanism, and the feed source elevation angle accurately reaches a specific angle through a pitching adjusting mechanism. This approach ignores the calibration step of the feed polarization being positive. Simulation researches show that the deviation of the polarization of the feed source from the normal position can affect the cross polarization of the horizontal section line of the dead zone, namely, the zero-point deviation phenomenon of the cross polarization can occur under the condition of a small deviation range (such as fig. 7 and 8), and the horizontal deviation phenomenon of the cross polarization can occur under the condition of a large deviation range (such as fig. 9 and 10).

Therefore, in response to the above deficiencies, it would be desirable to provide an apparatus for compact range feed polarization calibration.

Disclosure of Invention

Technical problem to be solved

The invention aims to solve the technical problem that the polarization right-position calibration of a feed source in a customized design is neglected when the feed source is installed.

(II) technical scheme

In order to solve the technical problem, the invention provides equipment for polarization calibration of a compact range feed source, which comprises a support, a stabilizing box, an adjusting box, a feed source, a phase indicator, an adjuster and a pitching indicator, wherein the stabilizing box is fixedly connected at one end of the support, the adjusting box is fixedly connected at one side of the stabilizing box, the feed source is erected on the adjusting box, the phase indicator is erected at one side of the adjusting box, the adjuster is erected at the other end of the support, and the pitching indicator is erected at one side of the adjuster, wherein a worm and a worm wheel are rotatably connected in the adjusting box, one end of the worm penetrates through the adjusting box to be connected with the phase indicator, one end of the worm is rotatably connected to the adjusting box, one end of the worm wheel is connected with the feed source, the other end of the worm wheel is rotatably connected with the.

As a further explanation of the present invention, it is preferable that a thrust bearing is abutted on one side of the worm wheel and the thrust bearing is abutted on the stabilizer box.

As a further description of the present invention, preferably, the phase indicator includes a phase angle dial and an indicating handle, the phase angle dial is fixedly connected to one side of the adjusting box, the indicating handle is rotatably connected to the phase angle dial, one end of the indicating handle is fixedly connected to one end of the worm, and the phase angle dial is provided with scales.

As a further explanation of the present invention, preferably, the phase angle dial is a disk-shaped metal plate, the end face of the phase angle dial is provided with double-layer scales, the other end of the indicating handle is fixedly connected with an indicating plate, the middle part of the indicating plate is provided with a leak hole, and the width of the leak hole is the same as that of the single scale.

As a further illustration of the invention, it is preferred that the indicator panel thickness is less than the indicator stem thickness.

As a further description of the present invention, preferably, an electrical box is fixedly connected to a connecting end of the indicating handle and the worm, a locking switch is disposed on the electrical box, an electromagnet is inserted into the indicating handle on one side of the electrical box, and the electromagnet is electrically connected to the locking switch.

As a further explanation of the present invention, preferably, the stabilizing box is rotatably connected with a limiting shaft, one end of the limiting shaft is fixedly connected with the worm wheel, the other end of the limiting shaft is rotatably connected with the support, the middle part of the limiting shaft is fixedly connected with two abutting plates at intervals, a forward torsion spring and a reverse torsion spring are respectively placed on the two abutting plates, the forward torsion spring and the reverse torsion spring have different spiral directions, the same end of the forward torsion spring and the reverse torsion spring is abutted against the abutting plates, the same end of the forward torsion spring and the reverse torsion spring is abutted against a top block, and the top block is fixedly connected on the inner wall of the stabilizing box.

As a further description of the present invention, preferably, the adjuster includes a support, a rotating shaft, a connecting frame and a handle, the rotating shaft is rotatably connected to the support, the axis of the rotating shaft is horizontal, the connecting frame is fixedly connected to the rotating shaft, the support is fixedly connected to the connecting frame, the handle is fixedly connected to one end of the rotating shaft, and the length direction of the handle is perpendicular to the rotating shaft.

As a further description of the present invention, preferably, the support is fixedly connected with a damper, and the damper is sleeved outside the rotating shaft.

As a further explanation of the present invention, it is preferable that the pitch indicator includes a pitch angle dial and a pitch pointer, the pitch angle dial is fixedly connected to the support, the pitch pointer is fixedly connected to the rotating shaft, and the pitch angle dial is provided with annularly distributed scales.

(III) advantageous effects

The technical scheme of the invention has the following advantages:

the feed source polarization calibration method adopted by the invention is simple and easy to implement, and the angle position of the feed source polarization true position can be accurately found out in a mode of combining simulation and actual measurement, so that the compact field cross polarization characteristic is ensured to completely meet the actual test requirement, and the test precision reaches the specified requirement. And after the polarization calibration is adjusted and calibrated once within a certain time, long-time normal test can be ensured, and the possibility of repeated calibration misoperation of polarization calibration personnel is reduced and the time cost brought by repeated calibration is also reduced by a mode of directly rotating the indicating handle to the angle position of the polarization calibration position recorded during calibration.

Drawings

FIG. 1 is a diagram of the overall assembly effect of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is an enlarged view of A in FIG. 2;

FIG. 4 is a cross-sectional view of the present invention;

FIG. 5 is a block diagram of the regulator of the present invention;

FIG. 6 is a side view of the regulator of the present invention;

FIG. 7 is a schematic diagram of the field distribution of the feed port under large clockwise deflection;

FIG. 8 is a schematic diagram of the horizontal sectional cross-polarization curve corresponding to FIG. 7;

FIG. 9 is a schematic diagram of the field distribution of the feed port at small clockwise skew;

fig. 10 is a diagram illustrating a horizontal sectional cross-polarization curve corresponding to fig. 9.

In the figure: 1. a support; 2. a stabilization box; 21. a limiting shaft; 22. a butting tray; 23. a positive torsion spring; 24. a reverse torsion spring; 25. a top block; 3. an adjusting box; 31. a worm; 32. a worm gear; 33. A thrust bearing; 4. a feed source; 5. a phase indicator; 51. a phase angle dial; 52. an indication handle; 53. an electrical box; 54. a lock-up switch; 55. an indicator panel; 56. a leak hole; 57. an electromagnet; 6. a regulator; 61. a support; 62. a rotating shaft; 63. a connecting frame; 64. a handle; 65. a damper; 7. a pitch indicator; 71. a pitch angle dial; 72. a pitch pointer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides an equipment for taking up range feed polarization calibration, combine figure 1, figure 5, including support 1, stabilize case 2, regulating box 3, feed 4, phase indicator 5, regulator 6 and every single move indicator 7, stabilize case 2 and link firmly in 1 one end of support, regulating box 3 links firmly in 2 one sides of stabilizing the case, feed 4 erects on regulating box 3, phase indicator 5 erects in 3 one sides of regulating box, regulator 6 erects at the 1 other end of support, every single move indicator 7 erects in 6 one sides of regulator.

With reference to fig. 1 and 4, the support 1 is a cylindrical tube, the stabilizing box 2 and the adjusting box 3 are both square shells, a limiting shaft 21 is rotatably connected in the stabilizing box 2, the axis direction of the limiting shaft 21 is horizontal, one end of the limiting shaft 21 extends into the adjusting box 3, the other end of the limiting shaft 21 is rotatably connected with the support 1, two abutting plates 22 are fixedly connected to the middle of the limiting shaft 21 at intervals, a forward torsion spring 23 and a reverse torsion spring 24 are respectively placed on the two abutting plates 22, the forward torsion spring 23 and the reverse torsion spring 24 have different spiral directions, the same ends of the forward torsion spring 23 and the reverse torsion spring 24 are abutted against the abutting plates 22, the same ends of the forward torsion spring 23 and the reverse torsion spring 24 are abutted with ejector blocks 25, and the ejector blocks 25 are fixedly connected to the inner wall of the stabilizing box 2; the forward torsion spring 23 and the reverse torsion spring 24 can provide certain reaction force when the limiting shaft 21 rotates forwards or reversely, so that the influence on the adjustment precision of the phase of the feed source 4 caused by the overlarge one-time rotation angle of the limiting shaft 21 is avoided.

Referring to fig. 1 and 4, a worm 31 and a worm wheel 32 are rotatably connected in the adjusting box 3, the length direction of the worm 31 is horizontal and vertical to the axis of the limiting shaft 21, one end of the worm 31 penetrates through the adjusting box 3 and is connected with the phase indicator 5, one end of the worm 31 is rotatably connected to the adjusting box 3, and the worm 31 can also extend out of the adjusting box 3 so that the worm 31 can be connected with a motor; the axis of the worm wheel 32 is coincided with the axis of the limiting shaft 21, one end of the worm wheel 32 is fixedly connected with the limiting shaft 21, the other end of the worm wheel 31 is fixedly connected with the feed source 4, one side of the worm wheel 32 is abutted with a thrust bearing 33, and the thrust bearing 33 is abutted on the stabilizing box 2, so that the worm wheel 32 rotates smoothly and is prevented from being in contact with the stabilizing box 2 to generate abrasion; the worm 31 and the worm wheel 32 are engaged and have a gear ratio of 1: 100. Through setting up worm 31 and worm wheel 32 of great drive ratio, realize that worm 31 rotates 10, worm wheel 32 rotates 0.1's effect, and then can make feed 4 keep in the calibration process that polarizes adjusting precision with simulation one, combine the elastic potential energy restriction of forward torsional spring 23 and reverse torsional spring 24, then can ensure to keep the laminating all the time between the worm 31 and the worm wheel 32 teeth of a cogwheel, and then make worm 31 and worm wheel 32 can export very stable drive ratio, and worm 31 rotates 10 and also be convenient for the calibrators to carry out the naked eye observation judgement, reduce the possibility of repeated calibration maloperation, guarantee calibration work has extremely high accuracy.

With reference to fig. 2 and 3, the phase indicator 5 includes a phase angle dial 51 and an indication handle 52, the phase angle dial 51 is a disc-shaped metal disc, double-layer scales are arranged on the end face of the phase angle dial 51, the scales on both sides are distributed in an annular array with 10 degrees as a unit, wherein the scale on the outermost side is 360-710 degrees from 0-350 degrees to the scale on the inner side, the phase angle dial 51 is fixedly connected to one side of the adjusting box 3, the indication handle 52 is rotatably connected to the center of the phase angle dial 51, one end of the indication handle 52 is fixedly connected to one end of the worm 31, the length direction of the indication handle 52 is perpendicular to the axial direction of the worm 31, and the indication handle 52 is arranged so that a calibrator can manually rotate the worm 31, or; the phase angle dial 51 is set to indicate the value of the rotation angle to the calibrator to determine the magnitude of the phase angle of the feed 4.

With reference to fig. 2 and 3, the other end of the indication handle 52 is fixedly connected with an indication plate 55, the thickness of the indication plate 55 is smaller than that of the indication handle 52, a strip-shaped leak hole 56 is formed in the middle of the indication plate 55, the width of the leak hole 56 is the same as that of a single scale, the leak hole 56 can be arranged to clearly indicate the rotation angle of the indication handle 52 in a scale framing manner, and the indication plate 55 with a thinner thickness can enable the scale to be displayed from the leak hole 56 more intuitively, so that a calibrator can observe the scale conveniently. The electric appliance box 53 is fixedly connected with the connecting end of the indicating handle 52 and the worm 31, the electric appliance box 53 can be connected with an external power supply, a locking switch 54 is arranged on the electric appliance box 53, an electromagnet 57 is inserted on the indicating handle 52 on one side of the electric appliance box 53, the electromagnet 57 is electrically connected with the locking switch 54 through a wire, after the indicating handle 52 is rotated to a specified position, the locking switch 54 can be pressed to enable the electric appliance box 53 and the electromagnet 57 to be electrified, the electromagnet 57 generates magnetic force to enable the indicating handle 52 to be adsorbed on the phase angle dial 51, the effect of fixing the indicating handle 52 is achieved, meanwhile, the worm wheel 32 and the worm wheel 31 have the characteristic of reverse self-locking, the worm wheel 31 and the feed source 4 can be prevented from being twisted by elastic potential energy of a.

With reference to fig. 5 and 6, the adjuster 6 includes a support 61, a rotating shaft 62, a connecting frame 63 and a handle 64, the support 61 can be fixedly connected to a horizontal position adjusting device or a platform, the rotating shaft 62 is rotatably connected to the support 61, the axis of the rotating shaft 62 is horizontal and perpendicular to the length direction of the support 1, the connecting frame 63 is fixedly connected to the rotating shaft 62, the support 1 is fixedly connected to the connecting frame 63, the handle 64 is fixedly connected to one end of the rotating shaft 62, the length direction of the handle 64 is perpendicular to the rotating shaft of the rotating shaft 62, and the adjuster 6 can control the pitch angle of the support 1 by rotating the handle 64, so as to adjust the pitch angle of the feed source 4, and accurately achieve a specific angle at the pitch angle of the feed source 4; the support 61 is fixedly connected with a damper 65, the damper 65 is sleeved outside the rotating shaft 62 to increase the rotating friction force of the rotating shaft 62, and the autonomous rotation of the rotating shaft 62 is limited after the rotating shaft 62 stops rotating, so that the elevation position stability of the feed source 4 is ensured.

With reference to fig. 5 and 6, the pitch indicator 7 includes a pitch angle dial 71 and a pitch pointer 72, the pitch angle dial 71 is fixedly connected to the support 61, the pitch pointer 72 is fixedly connected to the rotating shaft 62, and the pitch angle dial 71 is provided with annularly distributed scales, so that a calibrator can determine the pitch angle of the feed source 4.

After a customized feed source 4 model is obtained, taking the vertical upward direction of a current port as a polarization normal position direction, then taking the center of the port as the center of a circle, firstly rotating 90 degrees clockwise at intervals of 0.1 degree, then rotating 90 degrees anticlockwise, and obtaining a static area horizontal truncation cross polarization curve under each angle through computer simulation; then, the indication handle 52 is rotated once to obtain the cross polarization curve of the horizontal sectional line of the current quiet zone, and according to simulation analysis, the zero point offset phenomenon of cross polarization occurs under the condition of small range of normal position offset, the horizontal deflection phenomenon of cross polarization occurs under the condition of large range of normal position offset, the counterclockwise polarization offset corresponds to the zero point right-offset or horizontal right-inclination, and the clockwise polarization offset corresponds to the zero point left-offset or horizontal left-inclination. Repeatedly adjusting the rotation angle of the turntable according to the rule and testing again until the zero positions of the cross polarization curve and the polarization normal simulation curve are consistent; and finally, adjusting and correcting the polarization of the feed source regularly according to the test period and the use frequency, and ensuring that the polarization of the feed source is in a positive position.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. An apparatus for compact range feed polarization calibration, characterized by: comprises a bracket (1), a stabilizing box (2), an adjusting box (3), a feed source (4), a phase indicator (5), an adjuster (6) and a pitching indicator (7), wherein the stabilizing box (2) is fixedly connected at one end of the bracket (1), the adjusting box (3) is fixedly connected at one side of the stabilizing box (2), the feed source (4) is erected on the adjusting box (3), the phase indicator (5) is erected at one side of the adjusting box (3), the adjuster (6) is erected at the other end of the bracket (1), the pitching indicator (7) is erected at one side of the adjuster (6), wherein the adjusting box (3) is rotatably connected with a worm (31) and a worm wheel (32), one end of the worm (31) penetrates out of the adjusting box (3) to be connected with the phase indicator (5), one end of the worm (31) is rotatably connected on the adjusting box (3), one end of the worm wheel (32) is connected with the feed source (4), the other end of the worm wheel (32) is rotatably connected with the stabilizing, the worm (31) and the worm wheel (32) are meshed and have a transmission ratio of 1: 100.

2. An apparatus for compact range feed polarization calibration according to claim 1, wherein: one side of the worm wheel (62) is abutted with a thrust bearing (63), and the thrust bearing (63) is abutted on the stabilizing box (2).

3. An apparatus for compact range feed polarization calibration according to claim 1, wherein: the phase indicator (5) comprises a phase angle dial (51) and an indicating handle (52), the phase angle dial (51) is fixedly connected to one side of the adjusting box (3), the indicating handle (52) is rotatably connected to the phase angle dial (51), one end of the indicating handle (52) is fixedly connected with one end of the worm (31), and scales are arranged on the phase angle dial (51).

4. An apparatus for compact range feed polarization calibration according to claim 3, wherein: the phase angle dial plate (51) is discoid metal disc, is equipped with double-deck scale on the phase angle dial plate (51) terminal surface, and instruction handle (52) other end links firmly indicating dial (55), and leak (56) have been seted up at indicating dial (55) middle part, and leak (56) width is the same with single scale width.

5. An apparatus for compact range feed polarization calibration according to claim 4, wherein: the thickness of the indicating disc (55) is smaller than that of the indicating handle (52).

6. An apparatus for compact range feed polarization calibration according to claim 5, wherein: an electrical appliance box (53) is fixedly connected with the connecting end of the indicating handle (52) and the worm (31), a locking switch (54) is arranged on the electrical appliance box (53), an electromagnet (57) is inserted into the indicating handle (52) on one side of the electrical appliance box (53), and the electromagnet (57) is electrically connected with the locking switch (54).

7. An apparatus for compact range feed polarization calibration according to claim 6, wherein: stabilize case (2) internal rotation and be connected with spacing axle (21), spacing axle (21) one end links firmly with worm wheel (32), spacing axle (21) other end rotates with support (1) and is connected, spacing axle (21) middle part interval has linked firmly two butt flange (22), forward torsional spring (23) and reverse torsional spring (24) have been placed respectively on two butt flange (22), forward torsional spring (23) and reverse torsional spring (24) helical direction are different, forward torsional spring (23) and reverse torsional spring (24) syntropy one end all with butt flange (22) butt, there is kicking block (25) to the equal butt of forward torsional spring (23) and reverse torsional spring (24) syntropy other end, kicking block (25) link firmly on stabilizing case (2) inner wall.

8. An apparatus for compact range feed polarization calibration according to claim 1, wherein: the regulator (6) comprises a support (61), a rotating shaft (62), a connecting frame (63) and a handle (64), wherein the rotating shaft (62) is rotatably connected onto the support (61), the axis of the rotating shaft (62) is horizontal, the connecting frame (63) is fixedly connected onto the rotating shaft (62), the support (1) is fixedly connected onto the connecting frame (63), the handle (64) is fixedly connected onto one end of the rotating shaft (62), and the length direction of the handle (64) is perpendicular to the rotating shaft (62).

9. An apparatus for compact range feed polarization calibration according to claim 8, wherein: the support (61) is fixedly connected with a damper (65), and the damper (65) is sleeved outside the rotating shaft (62).

10. An apparatus for compact range feed polarization calibration according to claim 9, wherein: the pitching indicator (7) comprises a pitching angle dial plate (71) and a pitching pointer (72), the pitching angle dial plate (71) is fixedly connected to the support (61), the pitching pointer (72) is fixedly connected with the rotating shaft (62), and the pitching angle dial plate (71) is provided with scales distributed in an annular mode.