WO2020006826A1

WO2020006826A1 - Automatized antenna measurement turntable

Info

Publication number: WO2020006826A1
Application number: PCT/CN2018/101691
Authority: WO
Inventors: 陈林斌; 蒋宇; 王道翊; 邓东亮
Original assignee: 深圳市新益技术有限公司
Priority date: 2018-07-05
Filing date: 2018-08-22
Publication date: 2020-01-09
Also published as: CN110687357A

Abstract

Disclosed is an automatized antenna measurement turntable, comprising a rack (1), wherein the rack (1) is provided with a conveying device (2) for driving and placing an antenna to be measured, a positioning device (3) for correcting said antenna, a fixing device (4) for fixing said antenna, a lifting device (5) for driving the conveying device (2) to lift, and a rotary device (6) for driving the conveying device (2) to rotate. By means of the arrangement, the lifting device (5) is used in cooperation with the external conveying device (2), thereby realizing the purpose of automatically conveying the antenna to be measured; and the automatic positioning device (3) is additionaly provided to ensure the accuracy of the position of said antenna on the conveying device (2), and the fixing device (4) is combined to ensure the fixing of the position of said antenna when a turntable drives said antenna to rotate, thereby realizing an automatized test for said antenna.

Description

Automatic antenna measurement turntable

Technical field

The invention relates to the technical field of antenna testing, in particular to an automatic antenna measurement turntable.

Background technique

There are many methods for measuring antenna characteristic parameters. Currently, the main methods include three categories: the far field measurement of the antenna, the compact field measurement of the antenna, and the near field measurement of the antenna. Among them, the near field measurement of the antenna is mainly divided into three categories. : Planar near field, cylindrical near field and spherical near field.

Some automated antenna measurement turntables use a single-probe structure for measurement. The measurement process is: placing the antenna under test on a turntable that can rotate about an axis, using a single probe to reciprocate on a path parallel to the axis, and During the single unidirectional movement, the single probe scans the antenna to be measured; after rotating the turntable and the antenna to be measured at a certain angle, after the position scanning is completed, the single probe continues to move to the next position and repeats the scanning process to complete the cylinder. Scan to get the corresponding sampling data; according to the sampling data, the detection results can be obtained by computer analysis, and the purpose of near-field measurement of the antenna cylinder is achieved.

Patent No. 201721460088 discloses an antenna cylindrical near-field measurement system. The turntable used in the system can drive the antenna to rotate in one dimension and cooperate with a multi-probe array to complete the scanning of the antenna test.

However, the above-mentioned measurement system needs to manually fix the antenna to be tested on the turntable, and each test needs to be carried and re-fixed the antenna to be tested, which is inefficient for assembly line operations and heavy antennas.

Summary of the invention

The object of the present invention is to provide an automatic antenna measurement turntable, which has the advantage of high test efficiency.

The above technical objective of the present invention is achieved by the following technical solutions:

An automated antenna measurement turntable includes a rack, and the rack is provided with a transmission device for driving the antenna to be tested and placing the antenna to be tested, a positioning device for correcting the antenna to be tested, and a fixing for fixing the antenna to be tested A lifting device for driving the conveying device to rise and fall and a rotating device for rotating the conveying device.

By adopting the above technical solution, the antenna to be tested is transferred to the transmission device, the positioning device is used to correct the front and back position, and the left and right positions of the antenna to be tested. The fixing device is used to bind the antenna to the transmission device, and the lifting module is adjusted to lower it to the antenna. The center is flush with the center of rotation. During the cylinder near-field test, the probe is controlled to obtain multiple sampling data on a straight line of the antenna under test. The rotating device drives the antenna to be rotated at a certain angle, and then obtains another line of the antenna under test. The multiple sampling data of the cylinder are repeatedly measured in this way. Through the use of the lifting module and the transmission device, and the positioning device and the fixing device are added, the measured antenna is automatically transmitted to the test position and fixed, replacing the original. The method of manually transporting the antenna and fixing it with screws has a higher degree of test automation, reducing manual operations and greatly improving measurement efficiency.

It is further provided that the transmission device is driven by roller transmission, and the transmission device includes a transmission frame fixed on the lifting device and a plurality of rollers rotatably connected to the transmission frame.

By adopting the above technical solution, the position of the antenna under test in the length direction of the transmission device is adjusted by means of roller transmission. The roller moves the antenna under test to move, and the moving distance is precisely controlled by controlling the number of turns of the roller. .

Further setting: the positioning device includes a positioning plate fixed on the conveying device, and the positioning plate is symmetrically provided with a sliding block, and the axis of symmetry of the sliding block is located at the center of the width of the conveying device, and the sliding block is fixed with the The positioning block which the antenna to be tested interferes with, and the sliding block moves synchronously toward or away from each other along the width direction of the transmission device.

By adopting the above technical scheme, the sliding blocks on both sides slide synchronously, and the positioning blocks on the sliding blocks are in contact with the side wall of the antenna to be tested, so that the width direction of the antenna under test is positioned to the symmetry axis of the conveyor belt, and the two sliding blocks are synchronized. The movement ensures that the antenna under test can be fixed on the symmetry axis of the conveyor belt exactly, so that the center of the antenna under test can be aligned with the rotation axis of the rotating device after being adjusted by the lifting device.

It is further provided that: two positioning plates are provided, positioning commutators are provided on the positioning plates, sliding screw holes are provided on the sliding blocks, and the positioning commutators are located on the symmetrical axes of the two sliding blocks, A positioning screw is connected to the output end of the positioning commutator, the positioning screw is screwed to the sliding screw hole, a positioning motor is also fixed to the transmission device, and a rotating shaft is connected to the output end of the positioning motor. The positioning commutators on the two positioning plates are driven by the rotating shaft.

By adopting the above technical solution, the transmission ratio of the positioning commutator is stable, and the positioning screw rods on both sides can maintain synchronous rotation, ensuring that the positioning plates connected to the positioning screw rod can move stably and synchronously, and the positioning commutators on both sides adopt the same rotation. The axis drives and the positioning blocks on different positioning plates move synchronously, thereby ensuring that the position of the antenna under test in the width direction is located at the center of the transmission device.

It is further provided that the fixing device includes a tightening mechanism and a fixing piece that are slidingly connected to both sides of the conveying device, respectively, and a timing belt is fixedly connected to the fixing piece, and the timing belt is driven by the tightening mechanism.

By adopting the above technical scheme, the tightening mechanism is used to drive the timing belt to shrink, and the antenna to be tested is hooped on the transmission device; the surface of the timing belt has synchronous teeth, and the tightening mechanism has a gear meshing with the synchronous teeth, and the transmission ratio is stable. Convenient control; and after fixing, the timing belt is not prone to slippage, ensuring the effective fixing of the antenna under test.

It is further provided that the rotating device comprises a hollow rotating platform rotatably connected to the frame.

By adopting the above technical solution, the hollow rotary platform has the advantages of high repeat positioning accuracy, high rigidity and high rotation accuracy, and its motor is installed on the side, and the hollow structured turntable facilitates the installation of core wire slip rings and other structures.

It is further provided that the lifting device includes a lifting substrate fixed on the hollow rotary platform, the conveying device is slidably connected to the lifting substrate, and the conveying device can be raised to be flush with the upper surface of the hollow rotating platform.

By adopting the above technical scheme, after the transmission device is raised to be flush with the hollow rotating platform, the antenna to be tested can be directly sent to the transmission device through one end of the turntable, thereby realizing the pipeline operation of antenna detection.

Further setting: a radio frequency switch is arranged below the hollow rotating platform.

By adopting the above technical solution, the radio frequency switching switch can realize the fast switching of multi-port models under the control of wireless signals, and adjust the rotation and lifting of the hollow rotary platform.

In summary, the present invention has the following beneficial effects:

The lifting device is used in conjunction with the external transmission device to realize the purpose of automatically transporting the antenna under test, and an automatic positioning device is added to ensure that the position of the antenna under test on the transmission device is accurate. The combination of the fixing device ensures that the antenna position is fixed when the turntable drives the antenna under test to rotate. , To achieve automatic testing of the antenna.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the overall structure of the embodiment;

2 is a schematic structural view of a front view of the embodiment along a width direction;

3 is a schematic structural diagram of a positioning device in the embodiment;

4 is a schematic structural diagram of a fixing device in an embodiment;

FIG. 5 is an enlarged view of A in FIG. 4.

In the figure, 1, frame; 2, transmission device; 21, transmission frame; 22, roller; 3, positioning device; 31, positioning plate; 32, sliding block; 33, positioning block; 34, positioning commutator; 35 Positioning screw; 36. Positioning motor; 37. Rotating shaft; 4. Fixing device; 41. Tightening mechanism; 42; Fixing piece; 43; Synchronous belt; 5. Lifting device; 6. Rotating device.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment: An automated antenna measuring turntable, as shown in FIGS. 1 and 2, includes a frame 1, with rotating devices 6 fixed at both ends of the frame 1, lifting devices 5 fixed on the rotating devices 6, and lifting devices 5 on both sides. A transmitting device 2 is slidably connected to the upper side. The lifting devices 5 at both ends of the transmitting device 2 are synchronously raised and lowered. The transmitting device 2 is provided with a positioning device 3 for positioning the antenna to be tested and a fixing device 4 for fixing the antenna to be tested on the transmitting device 2.

As shown in FIGS. 1 and 2, the rotating device 6 includes a rotating motor fixed on the frame 1 and a hollow rotating platform driven by the rotating motor. The hollow rotating platform is evenly provided with a plurality of connection screw holes for fixing the lifting device 5. .

Referring to FIG. 2, the lifting device 5 includes a lifting substrate fixed on a hollow rotating platform, and a sliding table slidingly connected to the lifting substrate. The sliding table is fixedly connected to the conveying device 2. A lifting motor is connected to the sliding table, and the lifting motor drives the sliding. The stage is raised and lowered. During the raising and lowering process, the highest position of the conveying device 2 is flush with the upper end of the rotating device 6, and the lowest position is lower than the rotating shaft 37 of the rotating device 6.

Referring to FIG. 1, the conveying device 2 includes a conveying frame 21 fixed to the lifting device 5, and a plurality of rollers 22 rotatably connected to the conveying frame 21. The rollers 22 at both ends and the middle are rotated synchronously under the driving of a motor.

1 and 3, the positioning device 3 includes a mounting plate fixed below the conveying frame. A positioning motor 36 is fixed on the mounting plate. The output end of the positioning motor 36 drives the drive shaft to rotate by driving the commutator. The rotation direction of the drive shaft is vertical. The length direction of the transport frame 21. The transmission frame 21 is fixed with positioning plates 31 on both sides of the mounting plate, and a positioning commutator 34 is fixed in the center of the positioning plate 31. The positioning commutator 34 includes an input end and two output ends, and the two ends of the rotating shaft 37 are connected respectively. On the input end of the positioning commutator 34, the positioning plate 31 is rotatably connected to a positioning screw 35 connected to the output end of the positioning commutator 34, and a sliding block 32 is screwed to the positioning screw 35. A positioning block 33 is fixed, and the positioning block 33 penetrates from the gap of the roller 22 and extends to the upper surface of the conveying device 2. The positioning device 3 further includes a laser positioner fixed on the transmission device 2, and the position of the antenna to be tested in the transmission direction of the transmission device 2 is fixed.

1, 4 and 5, the fixing device 4 includes a fixing piece 42 and a tightening mechanism 41 slidably connected to the transmission frame 21, and a timing belt 43 connected between the tightening mechanism 41 and the fixing piece 42. The timing belt 43 is fixedly connected to the fixing piece 42. The tightening mechanism 41 includes a tightening motor and a tightening gear set. The tightening gear set includes a driving gear wheel and two driven gears driven by the tightening motor. The synchronous teeth on the timing belt 43 mesh with the driving gear and the driven gear. The rotation of the gear drives the timing belt 43 to move.

During use, the lifting device 5 is used to raise the transmission device 2 to be flush with the top surface of the hollow rotating platform, and the conveying device is used to send the antenna to be tested from above the hollow rotating platform into the transmitting device 2, and the positioning device 3 is used to position the antenna to be tested. Adjust the position. Move the fixing devices 4 on both sides to the antenna under test, and the fixed motor drives the timing belt 43 to tighten and clamp the antenna under test. Then the lifting device 5 is used to lower the transmission device 2 so that the axis of the antenna to be tested is facing the rotation center of the hollow rotating platform, and the RF rotary switch is used to control the rotation of the hollow rotating platform, thereby performing antenna measurements at different angles and different positions to obtain corresponding According to the sampling data, the detection results can be obtained by computer analysis according to the sampling data, and the purpose of near-field measurement of the antenna cylinder is achieved.

The above embodiment is only an explanation of the present invention, and it is not a limitation on the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed. Within the scope of the requirements are protected by patent law.

Claims

An automated antenna measuring turntable includes a frame (1), characterized in that: the frame (1) is provided with a transmission device (2) for driving the antenna to be tested and placing the antenna to be tested, and for correcting the antenna to be tested A positioning device (3) for the antenna, a fixing device (4) for fixing the antenna to be tested, a lifting device (5) for driving the lifting and lowering of the transmitting device (2), and a rotating device (6) for rotating the transmitting device (2).
The automatic antenna measuring turntable according to claim 1, characterized in that the transmission device (2) is driven by a roller (22) transmission method, and the transmission device (2) comprises a lifting device (5) fixed on the lifting device (5). The transfer frame (21) and a roller (22) connected to the transfer frame (21).
The automatic antenna measuring turntable according to claim 1, wherein the positioning device (3) comprises a positioning plate (31) fixed on the transmission device (2), and the positioning plate (31) is symmetrically disposed on the positioning plate (31) The sliding block (32), the axis of symmetry of the sliding block (32) is located at the width center position of the transmission device (2), and a positioning block (33) which is in contact with the antenna to be tested is fixed on the sliding block (32). The sliding block (32) moves synchronously toward or away from each other along the width direction of the conveying device (2).
The automatic antenna measurement turntable according to claim 3, characterized in that: two positioning plates (31) are provided, a positioning commutator (34) is provided on the positioning plates (31), and the sliding block is provided (32) is provided with a sliding screw hole, the positioning commutator (34) is located on the symmetry axis of the two sliding blocks (32), and an output end of the positioning commutator (34) is connected with a positioning screw (35) ), The positioning screw (35) is threadedly connected to the sliding screw hole, a positioning motor (36) is also fixed on the transmission device (2), and a rotating shaft (37) is connected to the output end of the positioning motor (36) ), The positioning commutators (34) on the two positioning plates (31) are driven by the rotating shaft (37).
The automatic antenna measuring turntable according to claim 1, wherein the fixing device (4) comprises a tightening mechanism (41) and a fixing piece (42) slidably connected to both sides of the conveying device (2), and One end is fixed to a timing belt (43) on a fixed piece (42), and the timing belt (43) is moved by a tightening mechanism (41).
The automatic antenna measuring turntable according to claim 1, wherein the rotating device (6) comprises a hollow rotating platform rotatably connected to the frame (1).
The automatic antenna measuring turntable according to claim 6, characterized in that the lifting device (5) comprises a lifting substrate fixed on a hollow rotary platform, and the conveying device (2) is slidably connected to the lifting substrate, and The conveying device (2) can be raised to be flush with the upper surface of the hollow rotating platform.
The automatic antenna measuring turntable according to claim 1, characterized in that a radio frequency switching switch is provided below the rotating device (6).