CN209963261U - Antenna bracket for electromagnetic wave experiment - Google Patents
Antenna bracket for electromagnetic wave experiment Download PDFInfo
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- CN209963261U CN209963261U CN201920914343.7U CN201920914343U CN209963261U CN 209963261 U CN209963261 U CN 209963261U CN 201920914343 U CN201920914343 U CN 201920914343U CN 209963261 U CN209963261 U CN 209963261U
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Abstract
The utility model provides an antenna bracket for electromagnetic wave experiments, which comprises an antenna mounting plate, an axial rotating frame, an axial frame knob, an upper support frame and a lower support frame; the upper support frame comprises a first end and a second end, the first end is fixedly connected with a support column, the support column is movably inserted in the lower support frame, and the second end is provided with a through transverse bearing seat; the axial rotating frame comprises two fixed rods with the same structure and parallel to each other and a bracket seat with an axial rod; the two fixed rods are respectively and oppositely fixed at two ends of the bracket base, the axial rod is fixedly arranged in the middle of the bracket base, and the fixed rods and the axial rod are respectively positioned at two sides of the bracket base; the axial rod penetrates through the support column, one end of the axial rod, which penetrates out of the support column, is connected with the axial frame knob, and the antenna mounting plate is clamped between the two fixing rods in a 360-degree rotating manner and is positioned at one end of the fixing rod, which is far away from the bracket base; the antenna mounting plate comprises a plate body, wherein first discs are symmetrically arranged on two sides of the plate body, a first rotating shaft is arranged on the outer side of each first disc, the first rotating shaft and the first discs share a central shaft, the first rotating shaft is embedded in a fixed rod, and the plate body and the first rotating shaft form an eccentric structure.
Description
Technical Field
The utility model relates to an electromagnetic wave experiment technical field especially relates to an antenna boom for electromagnetic wave experiment.
Background
The electromagnetic field and the electromagnetic wave are a technical basic course which is bound by the professional department of the electronic information and the electric information in the higher schools. Along with the continuously increasing demand of the development of the current electronic information technology on the electromagnetic wave knowledge, in the course teaching of electromagnetic fields and electromagnetic waves, the electromagnetic wave teaching needs to be fully displayed through knowledge points urgently, the pertinence of knowledge education and capability culture is strong, and the electromagnetic wave characteristics embody specific, visual, simple and convenient experimental teaching modes and means to strengthen and assist the teaching of key and difficult points of the electromagnetic wave knowledge so as to improve the teaching effect. The antenna bracket is an essential auxiliary device in electromagnetic field and electromagnetic wave experiments, and is mainly used for mounting and fixing the antenna when electromagnetic wave experiments are carried out in colleges and universities and scientific research units. The antenna support in the prior art is generally an arc chord-shaped dial which is fixed on a supporting rod and can be adjusted in a rotating mode, angles are carved on the dial, an antenna is installed on the back face of the dial, the up-down pitching position of the antenna is adjusted through the rotation of the dial, the left-right direction swinging of the antenna is adjusted through the rotation of the supporting rod, and the height adjustment is achieved through the up-down movement of the supporting rod in a base.
However, the antenna support in the prior art has a certain defect that the mounting position of the antenna is not at the center point of rotation, so that the center of the antenna deviates from the original position when the antenna dial rotates. In the polarization experiment, the experimental result is inaccurate; secondly, the adjustment of the antenna posture can be realized only by linkage of two rotating parts; height adjustment also affects azimuth accuracy, so the antenna mount cannot independently make azimuth, pitch, axial (roll) or height adjustments using a single adjustment mechanism.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that exists among the prior art, and propose, not only improved the accuracy of experiment, can realize the antenna gesture that single guiding mechanism directly adjusted corresponds moreover, the adjustment is nimble convenient.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an antenna bracket for electromagnetic wave experiments comprises an antenna mounting plate, an axial rotating frame, an axial frame knob, an upper support frame and a lower support frame; the upper support frame comprises a first end and a second end, the first end is fixedly connected with a support column, the support column is movably inserted into the lower support frame, and the second end is provided with a through transverse bearing seat; the axial rotating frame comprises two fixed rods with the same structure and parallel to each other and a bracket seat with an axial rod; the two fixing rods are respectively and oppositely fixed at two ends of the bracket base, the axial rod is fixedly arranged in the middle of the bracket base, and the fixing rods and the axial rod are respectively positioned at two sides of the bracket base; the axial rod penetrates through the transverse bearing seat, one end of the axial rod, which penetrates out of the transverse bearing seat, is connected with the axial frame knob, and the antenna mounting plate can be clamped between the two fixing rods in a 360-degree rotating manner and is positioned at one end of the fixing rod, which is far away from the bracket base; the antenna mounting panel includes the plate body, the plate body bilateral symmetry is provided with first disc, the outside of first disc is equipped with first axis of rotation, first axis of rotation with first disc center pin altogether, first axis of rotation inlays the dress and is in the dead lever, the plate body with first axis of rotation becomes eccentric structure.
Preferably, a midpoint of a line connecting axes of the first rotating shafts is located on a central axis of the support column.
Preferably, the side of support column is equipped with the spacing groove, the length in spacing groove is less than the length of support column, the lower carriage is close to the side of the one end of upper bracket is equipped with stop screw, stop screw detachably connects soon the spacing inslot.
Preferably, one end of the lower support frame, which is far away from the upper support frame, is provided with an orientation adjusting shaft, the orientation adjusting shaft is detachably inserted into a sliding block which is matched with the antenna bracket, and the sliding block can be carried on a horizontal sliding rail of the experiment platform in a front-back sliding manner; an azimuth dial with 360-degree scales is arranged on the upper surface of the sliding block, an azimuth pointer is fixedly mounted on the side edge of the lower supporting frame, and the azimuth pointer is parallel to the azimuth dial and is located right above the azimuth dial.
Preferably, the transverse bearing seat is internally provided with a friction surface layer for preventing the axial rotating frame from automatically deflecting to cause errors due to the gravity action of the antenna; the outer surface of the axial frame knob is provided with 360-degree angle scales, and a mark line is arranged right above the outer surface of the transverse bearing seat and used for aligning the angle scales on the outer surface of the axial rotating frame, so that the specific rotating angle of the axial rotating frame is read; when the axial rotation frame is horizontal, the pointer on the knob of the axial frame indicates 0 degree.
Preferably, the first disc is a pitch angle dial with 360-degree scales, one end of the fixed rod connected with the first disc is provided with a scale pointer, the extending direction of the scale pointer is the same as the extending direction of the fixed rod, and the scale pointer indicates on the first disc; the outer side of the first rotating shaft is provided with a first convex disc, the first convex disc is positioned on the first circular disc, the diameter of the first convex disc is smaller than the diameter radius of the first circular disc, and the first convex disc is positioned between the first circular disc and the fixing rod.
Preferably, the upper support frame is an arc-shaped support or a right-angle support, the upper support frame comprises a straight section located below, the straight section is parallel to the axial rotating frame, and the distance between the axial rotating frame and the straight section is greater than the length of the fixed rod.
Preferably, the fixing lever is tapered and thinned from an end connected with the holder to an end of the fixing lever connected with the first rotating shaft.
Preferably, the axial rotation frame is of a unilateral structure, the unilateral structure includes a second support base, a second axial rod and a second fixing rod, the second fixing rod and the second axial rod are respectively located at two sides of the second support base, the second axial rod is fixedly arranged at the middle of the second support base, the second fixing rod is fixedly arranged at one side of the second support base, a second fixing hole is formed in one end, far away from the second support base, of the second fixing rod, and the first rotation shaft is rotatably arranged in the second fixing hole in a penetrating mode and fixed through a pitching knob.
Preferably, the antenna support further comprises a mounting plate special for a loop antenna, the mounting plate special for the loop antenna comprises a mounting plate body, second disks are arranged on two sides of the mounting plate body, the second disks are pitch angle dials with 360-degree scales, a second rotating shaft is arranged on the outer side of each second disk, the second rotating shaft is located at the circle center of each second disk, and the mounting plate body and the second rotating shaft form an eccentric structure; a second convex disc is arranged on the outer side of the second rotating shaft, the diameter of the second convex disc is smaller than that of the second disc, and when the special mounting plate for the loop antenna is mounted between the fixing rods, the second convex disc is located between the fixing rods and the second disc; the mounting plate body comprises a first section and a second section, a first sliding groove is formed in the middle of the first section, two identical second sliding grooves are formed in the second section, a fixing buckle is embedded in the first sliding groove in a sliding mode, the first sliding groove and the second sliding groove are identical in length, and the distances of connecting lines between the first sliding groove and the second sliding groove and between the second sliding groove and the second rotating shaft are identical; the first sliding groove side edge is provided with a first scale, the second sliding groove side edge is provided with a second scale, and the first scale and the second scale are symmetrical by taking a connecting line between the second rotating shafts as a symmetry axis.
Compared with the prior art, the beneficial effects of the utility model are that: the antenna bracket is made of insulating materials, so that the antenna oscillator is insulated from the outside; the pitching adjustment of the antenna can be realized through the vertical rotation of the antenna mounting plate; the axial rotation bracket is driven to rotate by rotating the knob of the adjusting axial bracket, so that the axial rotation, namely rolling, of the antenna is realized; the azimuth adjustment of the antenna is realized through the left-right rotation of the lower support frame on the bottom sliding block; the height of the antenna can be adjusted by adjusting the support column in the lower support frame in a vertically sliding manner, so that the antenna is adjusted to a proper height, and accurate experimental data are obtained; through the arrangement of the structure, the antenna can be adjusted in multiple directions and multiple dimensions, so that different experimental data can be obtained, any parameter adjustment in the adjustable parameters is not linked with other parameters, and other parameters cannot be changed; the antenna mounting plate adopts a unique eccentric design, so that the extension line of the axis of the antenna oscillator is ensured to be vertically intersected with the connecting line of the axis of the first rotating shaft after the antenna oscillator is mounted, and the center of the antenna oscillator is always in the central position of the connecting line of the first rotating shaft when the antenna oscillator rotates axially; the upper supporting frame and the axial rotating frame form an arch structure, so that the axis extension line of the supporting column passes through the axis connecting line of the first rotating shaft of the antenna mounting plate, and the center of the antenna is ensured not to deviate all the time no matter the antenna is rotated by direction adjustment or axial adjustment or direction adjustment.
Drawings
Fig. 1 is a schematic view of the overall structure of an antenna bracket for electromagnetic wave experiments of the present invention.
Fig. 2 is a schematic structural diagram of an antenna mounting plate of an antenna bracket for an electromagnetic wave experiment according to the present invention.
Fig. 3 is a schematic structural diagram of the axial rotation frame of the antenna bracket for electromagnetic wave experiments according to the present invention.
Fig. 4 is a schematic structural diagram of the combination of the lower support frame and the support column of the antenna bracket for electromagnetic wave experiments of the present invention.
Fig. 5 is a schematic structural diagram of the right-angled upper support frame of the antenna bracket for electromagnetic wave experiments of the present invention.
Fig. 6 is a schematic structural diagram of the single-side structure of the axial rotation frame of the antenna bracket for the electromagnetic wave experiment of the present invention.
Fig. 7 is a schematic structural diagram of the loop antenna mounting plate of the antenna bracket for electromagnetic wave experiments according to the present invention.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, an antenna bracket for electromagnetic wave experiments according to an embodiment of the present invention includes an antenna mounting plate 1, an axial rotation frame 2, an axial frame knob 3, an upper support frame 4 and a lower support frame 5; the upper support frame 4 comprises a first end 41 and a second end 42, the first end 41 is fixedly connected with a support column 43, the support column 43 is of an axisymmetric structure, the support column 43 is vertically connected below the first end 41, the upper surface of the lower support frame 5 is provided with a mounting hole 51, the depth of the mounting hole 51 is greater than the length of the support column 43, the support column 43 is movably inserted in the mounting hole 51 of the lower support frame 5, the support column 43 can be ensured to be drawn up and down, the height of the antenna or the antenna oscillator in the vertical direction is further adjusted, and the position with the strongest signal of the antenna or the antenna oscillator is found; the second end 42 is provided with a through transverse bearing seat 44, the transverse bearing seat 44 is perpendicular to the second end 42 and is arranged above the second end 42, namely the transverse bearing seat 44 is horizontally arranged; as shown in fig. 1 and 3, the axial rotation frame 2 includes two fixing rods 21 with the same structure and parallel to each other and a frame base 22 with an axial rod 23; the two fixing rods 21 are respectively and oppositely fixed at two ends of the bracket base 22, the axial rod 23 is fixedly arranged in the middle of the bracket base 22, and the fixing rods 21 and the axial rod 23 are respectively positioned at two sides of the bracket base 22; the axial rotating frame 2 is in an axisymmetric structure, and the symmetric axis is an extension line of the central axis of the axial rod 23; the axial rod 23 is arranged in the transverse bearing seat 44 in a penetrating manner, one end of the axial rod penetrating through the transverse bearing seat 44 is connected with the axial frame knob 3, and the antenna mounting plate 1 can be clamped between the two fixing rods 21 in a 360-degree rotating manner and is positioned at one end of the fixing rod 21 far away from the bracket base 22; the original distance between the two fixed rods 21 is less than or equal to the width of the antenna mounting plate 1, so that the antenna mounting plate 1 is not easy to fall off and rotate after being embedded; when the antenna mounting plate 1 is mounted, the fixing rods 21 are broken off towards two sides, so that the first rotating shaft 13 is embedded between the fixing rods 21, and the fixing rods 21 have certain deformation and resetting performance, so that the mounting and dismounting of the antenna mounting plate 1 can be realized; the opposite sides of one ends of the two fixing rods 21 far away from the support base 22 are respectively provided with a concave fixing groove 24, a connecting line between the centers of the two fixing grooves 24 on the fixing rods 21 is parallel to the support base 22 and is perpendicular to the two fixing rods 21, and the first rotating shaft 13 of the antenna mounting plate 1 is mounted in the fixing groove 24. As shown in fig. 2, the antenna mounting plate 1 includes a plate body 11, a first disc 12 is symmetrically disposed on both sides of the plate body 11, a first rotating shaft 13 is disposed on an outer side of the first disc 12, the first rotating shaft 13 and the first disc 12 share a central axis, i.e. an axis of the first rotating shaft 13 coincides with a center of the first disc 12, the first rotating shaft 13 is embedded in a fixing groove 24 on an inner side of a fixing rod 21, the plate body 11 and the first rotating shaft 13 are in an eccentric structure, the eccentricity is h as shown in fig. 2, i.e. a connecting line between the plate body 11 and an axis of the first rotating shaft 13 is far away and parallel to the axis of the first rotating shaft 13, a distance between the plate body 11 and the axis of the first rotating shaft 13 is h, a space between a connecting line of the axis 14 of the first rotating shaft 13 and the plate body 11 is used for mounting a circuit board backing plate 15 (including a wave detection plate or a light plate), a symmetrical antenna or an antenna element 16 is mounted on the, therefore, the signal center of the antenna or the antenna oscillator 16 is located at the center of the antenna mounting plate 1, namely, the midpoint of the line of the axis 14 of the first rotating shaft 13, so that the center of the antenna is not changed during pitching adjustment, azimuth adjustment, axial adjustment and front-back adjustment, and the experimental effect is ensured.
When the antenna or the antenna oscillator 16 is used, the antenna or the antenna oscillator 16 is arranged on the antenna mounting plate 1, then the antenna mounting plate 1 is clamped between the fixing rods 21, and the antenna mounting plate 1 rotates in a pitching mode to drive the antenna or the antenna oscillator 16 to rotate, so that the pitching adjustment of the antenna is realized; the axial rotating frame 2 can be driven to rotate by rotating the axial frame knob 3, and the antenna mounting plate 1 and the antenna or the antenna oscillator 16 are driven to axially rotate by the axial rotating frame 2 by utilizing a transmission principle; the rotation of the lower support frame 5 on the sliding block 6 is utilized to realize the azimuth rotation of the antenna or the antenna oscillator 16; the height of the antenna or the antenna oscillator 16 is adjusted by utilizing the up-and-down adjustment of the upper support frame 4 in the lower support frame 5 until the center of the antenna or the antenna oscillator 16 and the center of the experimental transmitting antenna are positioned on the same horizontal line, the position of height adjustment is judged by specifically referring to the signal intensity on external test equipment, and the adjustment is stopped until the signal is strongest; the transverse adjustment of the distance between the antenna or the antenna oscillator 16 and the transmitting antenna is realized by the sliding of the sliding block 6 on the sliding rail, and the sliding rail is usually supported by double rails, so that the stability of the transverse adjustment can be ensured. The whole antenna support is made of insulating materials, the axial rotating frame 2, the upper support frame 4 and the like are of an integrally formed structure, and the structural stability is high.
In another embodiment, the fixing bar 21 is connected to the antenna mounting board 1 in another way. That is, the first rotating shaft 13 is fixedly disposed at one end of the fixing rod 21 far away from the bracket base 22, the central axes of the first rotating shafts 13 on the two fixing rods 21 are overlapped with each other, the concave fixing grooves for fixing the first rotating shafts 13 are correspondingly disposed at the center of the first disk 12, during installation, the fixing grooves 24 on one side of the antenna mounting plate 1 are firstly sleeved on the adjacent first rotating shafts 13, then the fixing rods 21 are opened outward for a certain distance, and the fixing grooves 24 on the other side of the antenna mounting plate 1 are sleeved on the adjacent other first rotating shaft 13.
Preferably, the midpoint of the connecting line between the axes 14 of the first rotating shaft 13 is located on the central axis of the supporting column 43, that is, the midpoint of the connecting line between the axes 14 of the first rotating shaft 13 is located directly above the supporting column 43, and the axial rotating frame 2 is horizontally arranged and perpendicular to the extension line of the supporting column 43, so that it can be ensured that the center of the antenna or the antenna element 16 is always located on the central axis of the supporting column 43 during adjustment of other parameters, and it is ensured that the center of the antenna or the antenna element 16 is not shifted.
As shown in fig. 1 and 4, preferably, the side surface of the support column 43 is provided with a limit groove 431, the length of the limit groove 431 is less than that of the support column 43, the side surface of the lower support 5 near one end of the upper support 4 is provided with a limit screw 54, and the limit screw 54 is detachably screwed in the limit groove 431. The limiting groove 431 is arranged, so that the limiting screw 54 can be screwed into the supporting column 43, when the limiting screw 54 is loosened, the supporting column 43 can be pulled up and down to adjust the height, an experimental point with the strongest signal of the antenna or the antenna oscillator 16 is searched, and after the height is determined, the limiting screw 54 is locked to fix the height of the antenna bracket. In addition, the setting of spacing groove 431 can let stop screw 54 alternate in spacing groove 431, makes support column 43 and bottom suspension strut 5 realize fixing and linkage, avoids support column 43 at the 5 internal rotations of bottom suspension strut, and leads to antenna or antenna element 16 position angle error to appear, influences the experiment effect. The outside of spacing groove 431 is equipped with the height scale, can show the height value of concrete regulation. In one embodiment, the supporting column 43 is cylindrical or prismatic, and the aperture of the mounting hole 51 matched with the supporting column 43 is only slightly larger than the outer diameter of the supporting column 43, so that the supporting column 43 can be mounted in the mounting hole 51; the supporting column 43 with the cylindrical structure and the mounting hole 51 matched with the supporting column are cylindrical holes, and the supporting column can be limited from being intelligently inserted and pulled up and down and cannot rotate left and right by the mutual matching of the limiting groove 431 and the limiting screw 54; the mounting hole of the prismatic support column 43, which is matched with the prismatic support column, is also a prismatic hole, and the limit of the support column can be only inserted and extracted up and down through the limit screw 54.
Preferably, one end of the lower support frame 5, which is far away from the upper support frame 4, is provided with an orientation adjusting shaft 52, the orientation adjusting shaft 52 is detachably inserted into a sliding block 6 which is matched with the antenna support for use, and the sliding block 6 can be carried on a horizontal sliding rail of the experimental platform in a front-back sliding manner; an azimuth dial 7 with 360-degree scales is arranged on the upper surface of the sliding block 6, an azimuth pointer 53 is fixedly arranged on the side edge of the lower support frame 5, and the azimuth pointer 53 is parallel to the azimuth dial 7 and is positioned right above the azimuth dial 7. In the experiment, the lower support frame 5 is rotated by taking the azimuth adjusting shaft 52 as an axis, and the azimuth adjusting angle can be clearly known by using the indication of the azimuth pointer 53 on the azimuth dial 7; and drive whole antenna boom rotatory when lower carriage 5 is rotatory to drive antenna or antenna element 16 and realize the position rotation, and then realize the simple position regulation of antenna or antenna element 16.
Preferably, a friction surface layer is arranged in the transverse bearing seat 44 to prevent the axial rotation frame 2 from automatically deflecting due to the gravity action of the antenna to cause errors, 360-degree angle scales are arranged on the outer surface of the axial rotation frame knob 3, a mark line 441 is arranged right above the outer surface of the transverse bearing seat 44, and the mark line 411 points to the axial rotation frame knob 3 to indicate the angle scales on the outer surface of the axial rotation frame knob 3, so that the specific angle of rotation of the axial rotation frame 2 is read; the marking line on the axial turret knob 3 indicates 0 degrees when the axial turret 2 is horizontal. During the experiment, drive axial swivel mount 2 through rotation axial mount knob 3 and rotate, axial swivel mount 2 drives antenna mounting panel 1 rotation again, and antenna or antenna element 16 install on antenna mounting panel 1 to realize antenna or antenna element 16's axial rotation. By means of the mark lines 441 on the transverse bearing seat 44 and the 360-degree scales on the axial frame knob 3, the rotation angle of the antenna or the antenna oscillator 16 can be clearly and accurately adjusted, and experimental tests can be conveniently carried out on the antenna or the antenna oscillator 16 at various angles in experiments. In addition, the axial rod 23 and the axial frame knob 3 are respectively provided with a locking pin hole 231 which are matched with each other, after the axial frame knob 3 is screwed on the axial rod 23, the locking pin holes 231 on the axial frame knob 3 and the axial rod 23 are aligned, and a locking pin is inserted, so that the axial frame knob 3 and the axial rod 23 are locked, and the axial frame knob 3 and the axial rod 23 are prevented from being loosened or rotating at a relative angle during rotation.
Preferably, the first disc 12 is a pitch angle dial with 360-degree scales, a point where the diameter of the first disc 12 parallel to the plate body 11 is located is a 0-degree scale point, one end of the fixed rod 21 connected with the first disc 12 is provided with a scale pointer 25, the extending direction of the scale pointer 25 is the same as the extending direction of the fixed rod 21, and the scale pointer 25 indicates on the first disc 12; the outer side of the first rotating shaft 13 is provided with a first convex disc 17, the first convex disc 17 is positioned on the first circular disc 12, the diameter of the first convex disc 17 is smaller than the diameter radius of the first circular disc 12, and the first convex disc 17 is positioned between the first circular disc 12 and the fixed rod 21. The first disc 12 is a pitching angle dial, which can determine the adjusting angle of the antenna during pitching adjustment, and the scale pointer 25 can accurately read the rotating angle of the antenna mounting plate 1, so that the experimental result can be conveniently output, and the center of the antenna does not shift during pitching adjustment; the first convex disc 17 is arranged to space the fixing rod 21 and the first disc 12, so that the fixing rod 21 is not connected with the first disc 12, and the angle scale on the first disc 12 is not worn.
As shown in fig. 1 and 5, preferably, the upper support frame 4 is an arc-shaped support or a right-angle support, the upper support frame 4 includes a straight section 45 located below, the straight section 45 is parallel to the axial rotation frame 2, and the distance between the axial rotation frame 2 and the straight section 45 is greater than the length of the fixing rod 21. The arc-shaped or right-angle-shaped upper support frame 4 can provide a rotating space for 360-degree rotation adjustment of the antenna or the antenna element. The utility model discloses the length of the antenna element who is suitable for is not longer than the length of dead lever 21 to can guarantee that the rotation performance of antenna element is not influenced by antenna boom self structure. The setting of straight section 45 is used for extending curved length of upper bracket 4, avoid the rotation because of the less influence antenna element of radius of segmental arc or antenna, and straight section 45 is parallel with axial swivel mount 2, and the center pin extension line perpendicular to axial swivel mount 2 of support column 43, and the antenna mounting bracket is located support column 43 directly over, thereby can guarantee that the axle center at the axis of rotation of antenna mounting panel 1 falls on the center pin extension line of support column 43, make no matter 1 axial rotation wantonly of antenna mounting panel, the axle center that the homoenergetic guaranteed 1 axis of rotation of antenna mounting panel is located the center pin extension line of support column 43 all the time.
As shown in fig. 1 and 3, it is preferable that the fixing lever 21 is tapered and thinned from an end connected with the holder base 22 to an end where the fixing lever 21 is connected with the first rotating shaft 13. Due to the structural design, on one hand, the volume of the end part of the fixed rod 21 is reduced, the fixed rod 21 is prevented from shielding the angle scale on the first disc 12 or the second disc, experimenters can conveniently observe the specific adjusting angle clearly, and accurate experimental data can be obtained; on the other hand, the design of wide front and narrow back, thick front and thin back can ensure that one end of the fixed rod 21 far away from the bracket base 22 has good bending and resetting capabilities, and is convenient for the installation and the disassembly of the first antenna installation plate 1 or the special installation plate 9 for the loop antenna.
As shown in fig. 6, preferably, the axial rotation frame 2 is a unilateral structure 8, the unilateral structure 8 includes a second frame base 81, a second axial rod 82 and a second fixing rod 83, the second fixing rod 83 and the second axial rod 82 are respectively located at two sides of the second frame base 81, the second axial rod 82 is fixedly disposed at a middle portion of the second frame base 81, the second fixing rod 83 is fixedly mounted at a side of the second frame base 81, a second fixing hole 84 is disposed at one end of the second fixing rod 83 far away from the second frame base 81, and the first rotation shaft 13 is rotatably disposed in the second fixing hole 84 in a penetrating manner and is fixed by the pitch knob. The second axial rod 82 is provided with a second locking pin hole 85, which is convenient for the locking connection between the second axial rod 82 and the axial frame knob 3. By adopting the design of the second fixing rod 83, the material cost of the antenna bracket is saved while the supporting effect of the second fixing rod 83 is ensured, the first antenna mounting plate 1 is convenient to mount and rotate, and the rotation adjustment after the mounting of the antennas such as the yagi antenna is convenient is not influenced by the second fixing rod 83.
As shown in fig. 7, preferably, the antenna support further includes a mounting plate 9 dedicated to a loop antenna, the mounting plate 9 dedicated to a loop antenna includes a mounting plate body 91, two sides of the mounting plate body 91 are provided with second disks 92, each second disk 92 is a pitch angle dial with 360-degree scales, a second rotating shaft 93 is arranged outside each second disk 92, the second rotating shaft 93 is located at the center of each second disk 92, and the mounting plate body 91 and the second rotating shaft 93 form an eccentric structure; a second convex disc is arranged on the outer side of the second rotating shaft 93, the diameter of the second convex disc is smaller than that of the second circular disc 92, and when the special mounting plate 9 for the loop antenna is installed between the fixing rods 21, the second convex disc is located between the fixing rods 21 and the second circular disc 92; the mounting plate body 91 comprises a first section 911 and a second section 912, wherein a first sliding groove 913 is formed in the middle of the first section 911, two identical second sliding grooves 914 are formed in the second section 912, a fixing buckle 95 is slidably embedded in the first sliding groove 913, the first sliding groove 913 and the second sliding grooves 914 are identical in length, and the distances between connecting lines of the first sliding groove 913, the second sliding grooves 914 and the second rotating shaft 93 are identical; the first sliding groove 913 has a first scale 915 on a side thereof, the second sliding groove 914 has a second scale 916 on a side thereof, and the first scale 915 and the second scale 916 are symmetrical about a connection line between the second rotating shafts 93.
The design of the loop antenna dedicated mounting plate 9 allows the antenna fixture to be used for testing of the loop antenna 94, where the loop antenna 94 typically comprises an antenna in the shape of a circle, square, triangle, etc. During normal use test, the circuit board backing plate 15 (wave detection plate or light plate) is mounted on the second section 912 and fixed in the second sliding groove 914 by fastening screws, the circuit board backing plate 15 can be adjusted in position in the second sliding groove 914 by unscrewing the fastening screws, the fixing buckle 95 can be adjusted in position in the first sliding groove 913 at will, during specific experimental operation, the closed section of the loop antenna 94 is clamped in the fixing buckle 95, then the position of the fixing buckle 95 in the first sliding groove and the position of the loop antenna 94 in the fixing buckle 95 are adjusted, so that the interface end of the loop antenna 94 is located above the circuit board backing plate 15, then the interface end of the loop antenna 94 is fixed on the circuit board backing plate 15, the fastening screws for fixing the circuit board backing plate 15 are unscrewed, the sliding fixing buckle 95 and the circuit board backing plate 15 are synchronously adjusted, referring to the first scale and the second scale 916, when the values of the first scale 915 and the second scale 916 are equal, the experiment operation of the loop antenna 94 can be performed by stopping and screwing the fastening screw of the circuit board backing plate 15, and at this time, it can be ensured that the center of the loop antenna 94 is located at the center of the connecting line of the second rotating shaft 93, and the center of the loop antenna 94 is always unchanged along with the pitching adjustment or the axial adjustment and the azimuth adjustment of the loop antenna 94. In the experiment using the loop antenna 94, the mounting plate 9 dedicated to the loop antenna can rotate in a pitching manner, but the loop antenna cannot rotate 360 degrees in a pitching adjustment due to the lateral support of the fixing rod 21, but the loop antenna is not affected by the fixing rod 21 in an axial rotation manner, and can rotate at any angle.
From the above, the antenna bracket of the utility model for electromagnetic wave experiment adopts the insulating material, ensures the antenna oscillator to be insulated from the outside, ensures that the antenna bracket reflects and scatters electromagnetic waves as little as possible to reduce the change of electromagnetic field distribution; the pitching adjustment of the antenna can be realized through the vertical rotation of the antenna mounting plate; the axial rotation bracket is driven to rotate by rotating the knob of the adjusting axial bracket, so that the axial rotation, namely rolling, of the antenna is realized; the azimuth adjustment of the antenna is realized through the left-right rotation of the lower support frame on the bottom sliding block; the height of the antenna can be adjusted by adjusting the support column in the lower support frame in a vertically sliding manner, so that the antenna is adjusted to a proper height, and accurate experimental data are obtained; through the arrangement of the structure, the antenna can be adjusted in multiple directions and multiple dimensions, so that different experimental data can be obtained, any parameter adjustment in the adjustable parameters is not linked with other parameters, and other parameters cannot be changed; the antenna mounting plate adopts a unique eccentric design, so that the extension line of the axis of the antenna oscillator is ensured to be vertically intersected with the connecting line of the axis of the first rotating shaft after the antenna oscillator is mounted, and the center of the antenna oscillator is always in the central position of the connecting line of the first rotating shaft when the antenna oscillator rotates axially; the upper supporting frame and the axial rotating frame form an arch structure, so that the axis extension line of the supporting column passes through the axis connecting line of the first rotating shaft of the antenna mounting plate, and the center of the antenna is ensured not to deviate all the time no matter the antenna is rotated by direction adjustment or axial adjustment or direction adjustment.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (10)
1. An antenna support for electromagnetic wave experiments, its characterized in that: the antenna comprises an antenna mounting plate, an axial rotating frame, an axial frame knob, an upper support frame and a lower support frame;
the upper support frame comprises a first end and a second end, the first end is fixedly connected with a support column, the support column is movably inserted into the lower support frame, and the second end is provided with a through transverse bearing seat;
the axial rotating frame comprises two fixed rods with the same structure and parallel to each other and a bracket seat with an axial rod; the two fixing rods are respectively and oppositely fixed at two ends of the bracket base, the axial rod is fixedly arranged in the middle of the bracket base, and the fixing rods and the axial rod are respectively positioned at two sides of the bracket base; the axial rod penetrates through the transverse bearing seat, one end of the axial rod, which penetrates out of the transverse bearing seat, is connected with the axial frame knob, and the antenna mounting plate can be clamped between the two fixing rods in a 360-degree rotating manner and is positioned at one end of the fixing rod, which is far away from the bracket base;
the antenna mounting panel includes the plate body, the plate body bilateral symmetry is provided with first disc, the outside of first disc is equipped with first axis of rotation, first axis of rotation with first disc center pin altogether, first axis of rotation inlays the dress and is in the dead lever, the plate body with first axis of rotation becomes eccentric structure.
2. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the midpoint of a connecting line between the axes of the first rotating shafts is positioned on the central axis of the supporting column.
3. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the side of support column is equipped with the spacing groove, the length in spacing groove is less than the length of support column, the bottom suspension strut is close to the side of the one end of top suspension strut is equipped with stop screw, stop screw detachably connects soon the spacing inslot.
4. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: an azimuth adjusting shaft is arranged at one end, far away from the upper support frame, of the lower support frame, the azimuth adjusting shaft is detachably inserted into a sliding block matched with the antenna support for use, and the sliding block can be carried on a horizontal sliding rail of the experiment platform in a front-back sliding manner; an azimuth dial with 360-degree scales is arranged on the upper surface of the sliding block, an azimuth pointer is fixedly mounted on the side edge of the lower supporting frame, and the azimuth pointer is parallel to the azimuth dial and is located right above the azimuth dial.
5. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the transverse bearing seat is internally provided with a friction surface layer for preventing the axial rotating frame from automatically deflecting to cause errors under the action of the gravity of the antenna; the outer surface of the axial frame knob is provided with 360-degree angle scales, a mark line is arranged right above the outer surface of the transverse bearing seat, and when the axial rotating frame is horizontal, the pointer on the axial frame knob indicates 0 degree.
6. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the first disc is a pitching angle dial with 360-degree scales, a scale pointer is arranged at one end, connected with the first disc, of the fixed rod, the extending direction of the scale pointer is the same as the extending direction of the fixed rod, and the scale pointer indicates on the first disc; the outer side of the first rotating shaft is provided with a first convex disc, the first convex disc is positioned on the first circular disc, the diameter of the first convex disc is smaller than the diameter radius of the first circular disc, and the first convex disc is positioned between the first circular disc and the fixing rod.
7. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the upper support frame is an arc-shaped support or a right-angle-shaped support, the upper support frame comprises a straight section located below, the straight section is parallel to the axial rotating frame, and the distance between the axial rotating frame and the straight section is greater than the length of the fixed rod.
8. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the fixing lever is gradually narrowed and thinned from an end connected with the holder to an end of the fixing lever connected with the first rotating shaft.
9. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the axial direction swivel mount is unilateral structure, unilateral structure includes second support frame seat, second axial pole and a second dead lever, a second dead lever with the second axial pole is located respectively the both sides of second support frame seat, the fixed setting of second axial pole is in the middle part of second support frame seat, a second dead lever fixed mounting be in a side of second support frame seat, a second dead lever is kept away from the one end of second support frame seat is equipped with the second fixed orifices, the rotatable wearing to establish of first axis of rotation is in the second fixed orifices to it is fixed through the every single move knob.
10. The antenna mount for electromagnetic wave experiments as claimed in claim 1, wherein: the antenna support further comprises a special mounting plate for the loop antenna, the special mounting plate for the loop antenna comprises a mounting plate body, second discs are arranged on two sides of the mounting plate body, the second discs are pitch angle dials with scales of 360 degrees, a second rotating shaft is arranged on the outer side of each second disc and located at the circle center of each second disc, and the mounting plate body and the second rotating shafts form an eccentric structure; a second convex disc is arranged on the outer side of the second rotating shaft, the diameter of the second convex disc is smaller than that of the second disc, and when the special mounting plate for the loop antenna is mounted between the fixing rods, the second convex disc is located between the fixing rods and the second disc; the mounting plate body comprises a first section and a second section, a first sliding groove is formed in the middle of the first section, two identical second sliding grooves are formed in the second section, a fixing buckle is embedded in the first sliding groove in a sliding mode, the first sliding groove and the second sliding groove are identical in length, and the distances between connecting lines of the first sliding groove and the second rotating shaft are identical; the first sliding groove side edge is provided with a first scale, the second sliding groove side edge is provided with a second scale, and the first scale and the second scale are symmetrical by taking a connecting line between the second rotating shafts as a symmetry axis.
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| CN201920914343.7U CN209963261U (en) | 2019-06-18 | 2019-06-18 | Antenna bracket for electromagnetic wave experiment |
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| CN201920914343.7U CN209963261U (en) | 2019-06-18 | 2019-06-18 | Antenna bracket for electromagnetic wave experiment |
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