CN115542252A - Device for realizing radar main lobe target simulation and interference based on ground-air union - Google Patents
Device for realizing radar main lobe target simulation and interference based on ground-air union Download PDFInfo
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- CN115542252A CN115542252A CN202211146639.1A CN202211146639A CN115542252A CN 115542252 A CN115542252 A CN 115542252A CN 202211146639 A CN202211146639 A CN 202211146639A CN 115542252 A CN115542252 A CN 115542252A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/021—Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/027—Constructional details of housings, e.g. form, type, material or ruggedness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/38—Jamming means, e.g. producing false echoes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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Abstract
The invention discloses a device for realizing radar main lobe target simulation and interference based on ground-air combination, which comprises a simulation device and an interference device in communication connection with a radar device, wherein the interference device comprises an interference shell, a signal transmission assembly and a signal interference assembly, the signal transmission assembly and the signal interference assembly are arranged on the interference shell, the simulation device comprises an unmanned aerial vehicle and a luneberg ball arranged below the unmanned aerial vehicle, a guide assembly is fixedly arranged on the unmanned aerial vehicle, a buffer assembly is fixedly connected on the guide assembly, the buffer assembly can rotate through airflow guided by the guide assembly, the unmanned aerial vehicle can fly stably, the influence of interference airflow is avoided, the power consumption of a battery of the unmanned aerial vehicle can be reduced, and the unmanned aerial vehicle can reflect interference signals to the radar device through driving the luneberg ball through the simulation device, so that the load of the unmanned aerial vehicle can be reduced, the take-off of the unmanned aerial vehicle is easier, and the cruising ability of the unmanned aerial vehicle is enhanced.
Description
Technical Field
The invention relates to the technical field of signal transmission, in particular to a device for realizing radar main lobe target simulation and interference based on ground-air combination.
Background
The existing airborne target and interference shell are provided with a target and an interference shell on the unmanned aerial vehicle, and the radar is interfered in a long distance, so that the cruising ability of the unmanned aerial vehicle is greatly influenced, and the body space of the unmanned aerial vehicle is occupied; the maintenance cost and the use cost of the jet unmanned aerial vehicle are high;
if the interference shell is placed on the ground, a target cannot be simulated in a main lobe of the radar, the radar can identify an interference signal entering a side lobe through technical means such as side lobe shadow masking and the like, the interference effect is poor, and the actual situation cannot be approached; even if the ground target simulation device reaches the radar main lobe through the lifting device, the ground target simulation device can simulate only the radial change of the target and is not in accordance with the real situation.
In view of the above, the present application designs a device for realizing radar main lobe target simulation and interference based on ground-air union.
Disclosure of Invention
The invention aims to provide a device for realizing radar main lobe target simulation and interference based on ground-air combination so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the device comprises a simulation device and an interference device which is in communication connection with the radar device, wherein the interference device comprises an interference shell, and a signal transmission assembly and a signal interference assembly which are arranged on the interference shell, the simulation device comprises an unmanned aerial vehicle and a dragon ball arranged below the unmanned aerial vehicle, the dragon ball is used for reflecting signals, the unmanned aerial vehicle is fixedly provided with a cross rod, a sleeve pipe is fixedly arranged on the cross rod, the sleeve pipe is conveniently fixed through the cross rod, the unmanned aerial vehicle is arranged in the sleeve pipe, the unmanned aerial vehicle can be protected from directly colliding with the outside while playing a role in air suction conduction through the sleeve pipe, a guide assembly is fixedly arranged on the unmanned aerial vehicle and can guide interference airflow and provide a power source for a buffer assembly, the buffer assembly is fixedly connected onto the guide assembly, and can rotate through the airflow guided by the guide assembly, so that the interference airflow is uniformly and downwards discharged, the unmanned aerial vehicle can stably fly, the influence of the interference airflow is avoided, and the power consumption of a battery of the unmanned aerial vehicle can be reduced.
As preferred technical scheme, the signal transmission subassembly includes antenna, installing frame, toothed disc, annular rack, removal post and driver part, installing frame fixed mounting is in disturbing the casing side, it sets up inside the installing frame to remove the post activity, just both ends all extend to outside the installing frame about the removal post, the antenna is connected with removal capital portion through fine setting part, the annular rack cover is established on removing the post surface, the toothed disc sets up inside the installing frame and meshes with annular rack mutually, driver part is used for driving the removal post and removes, the antenna is used for receiving initial signal, initial signal does the signal of radar installation initial transmission.
As a preferred technical scheme, the signal interference component comprises a main circuit board, and an amplitude limiter, a coupler, a numerical control attenuator, a first power divider, a second power divider, a third power divider, a first digital radio frequency memory, a second digital radio frequency memory and a signal generator which are arranged on the main circuit board;
the amplitude limiter is used for limiting the amplitude of an initial signal within a certain range, the coupler is used for dividing one path of microwave power signal within the certain range into a first path of signal and a second path of signal in proportion, the first power divider is used for dividing the first signal into a third signal and a fourth signal, the numerical control attenuator is used for delaying and amplifying the first signal, the second power divider is used for dividing the amplified first signal into a fifth signal and a sixth signal, the first digital radio frequency memory and the second digital radio frequency memory are respectively used for storing and forwarding the fifth signal and the sixth signal, the signal generator transmits a seventh signal carrying noise, the fifth signal, the sixth signal and the seventh signal are reversely superposed into an interference signal through the third power divider and are transmitted through the antenna, the luneberg ball reflects the interference signal transmitted by the antenna, and the radar device receives the interference signal reflected by the luneberg ball.
As preferred technical scheme, the driver part includes motor, swing piece and holding ring, motor fixed mounting is diapire in the installing frame, the output fixed connection of swing piece one end and motor, the holding ring cover is established the surface that removes the post and with swing piece looks block, the one end that the motor was kept away from to the swing piece is seted up flutedly, the holding ring activity sets up inside the recess and rotates inside the recess, the recess inner wall fixedly connected with locating lever of swing piece, the locating groove with locating lever looks adaptation is seted up in the holding ring outside.
As preferred technical scheme, the fine setting part includes a location section of thick bamboo, a removal section of thick bamboo and spacing post, a location section of thick bamboo and removal capital end fixed connection, a removal section of thick bamboo activity sets up inside a location section of thick bamboo, spacing post fixed mounting is at a location section of thick bamboo inner wall, just the wave groove with spacing post looks adaptation is seted up to removal section of thick bamboo outer surface, diapire fixed connection in antenna and the removal section of thick bamboo, just the antenna side cover is equipped with the mount, mount bottom and removal section of thick bamboo inner wall fixed connection.
According to a preferred technical scheme, the guide assembly comprises a connecting rod, a box body, an air suction hole, a first cavity, a guide plate, a first connecting hole, a second connecting hole and a connecting pipe;
the bottom fixed mounting of unmanned aerial vehicle has the connecting rod, the lower extreme fixed mounting of connecting rod has the box body, the lateral wall all around of box body is V type structure, conveniently guides the interference air current and flows into the box body, conveniently fixes the box body in unmanned aerial vehicle's bottom through the connecting rod, connecting hole two has been seted up on the box body, makes things convenient for the air current to enter into the box body through connecting hole two, set up the hole of induced drafting on the outside lateral wall of cover ring pipe, can inhale the lantern ring intraductal with the interference air current through the hole of induced drafting, weaken the impact of interference air current to the outside of cover ring pipe, and be equipped with cavity one in the lantern ring pipe, the hole of induced drafting is the bell mouth, and the outer width is interior narrow, can weaken the interference air current and inhale the lantern ring intraductal, cavity one is favorable to the flow of air current, cavity one is fixed mounting has the guide board in the cavity, the guide board sets up for outer eight characters type, can be according to the air current of specific orientation with the guide through the guide board, connecting hole one has been seted up in the inside diameter lateral wall middle part of cover ring pipe, can be discharged the air current of lantern ring intraductal through connecting hole of connecting hole one, connecting hole and connecting pipe fixedly two be connected with connecting pipe.
As a preferred technical scheme, the buffer assembly comprises an opening, a cavity II, a first fixing rod, a fixing ring, a second fixing rod, a fixing plate, a connecting rod, a turbofan, a through hole and an exhaust hole;
the middle part of the side wall of the box body is provided with an opening, a cavity II is arranged in the box body, a connecting block is fixedly arranged between the openings, the connecting block is an isosceles triangle block, the tip part of the connecting block is outward, the connecting block plays a role in connecting, meanwhile, the interference airflow can conveniently enter the cavity II, the flowing of the airflow can not be obstructed, the interference airflow at the lower part of the unmanned aerial vehicle can conveniently enter the cavity II of the box body through the opening, a first fixing rod is fixedly arranged in the cavity annularly, a fixing ring is fixedly arranged between the first fixing rods, the fixing ring is conveniently fixed in the cavity II through the first fixing rod, a second fixing rod is symmetrically and fixedly arranged in the fixing ring, and fixing plates are fixedly arranged between the second fixing rods, fix the fixed plate in solid fixed ring's centre through two convenience of dead lever, fixed mounting has the connecting rod between the fixed plate, rotate on the connecting rod and install turbofan, turbofan can take place the rotation under the effort of interference air current, produces the air current downwards, produces the effort that rises, the through-hole has evenly been seted up on solid fixed ring's the outer wall, the drill way department slope of through-hole is installed and is expanded the board outward, can get into the through-hole with the air current guide in the cavity two through expanding the board outward in, conveniently disturb the air current through the through-hole and blow turbofan, the hole of airing exhaust has been seted up at the bottom middle part of box body, and the hole of airing exhaust conveniently rotates produced air current with turbofan downwards and discharges through airing exhaust.
As preferred technical scheme, fixed mounting has the subassembly of dodging on the unmanned aerial vehicle, dodge the subassembly and be used for realizing that the control sleeve can remove when the collision, avoid taking place to reduce and damage the deformation, dodge and be provided with shrink component on the subassembly, impact force when can absorbing the collision through shrink component avoids the screw impaired.
As a preferred technical scheme, the avoiding assembly comprises a fixed block, a crankshaft, a sliding block, a sliding hole and a first spring;
the last symmetry fixed mounting of unmanned aerial vehicle has the fixed block, fixed mounting has the bent axle in the fixed block, the bent axle is the arc pole, makes things convenient for the slider to move inwards through the pitch arc of bent axle, slidable mounting has the slider on the bent axle, the slide opening has been seted up on the slider, the bent axle runs through the slide opening, because slide opening and bent axle are sliding fit, make things convenient for the slider to slide on the bent axle, fixed mounting has first spring on the bent axle, first spring is in between fixed block and the slider, can fix the slider in the apex of bent axle through the spring action of first spring to through the first spring of slider extrusion when receiving the collision, can make the wing take place the skew, and then reach the effect of dodging.
As the preferred technical scheme, the retraction assembly comprises a sleeve, a through hole, a support rod, a sleeve block, a second spring, a protection ring and a propeller;
fixed mounting has the sleeve on the slider, the perforation is seted up to telescopic one side, it has branch to run through in the perforation, branch extends to the sleeve in, makes things convenient for branch to remove in the sleeve through the perforation, the one end fixed mounting of branch has the cover block, cover block slidable mounting can avoid branch to break away from in the sleeve through the cover block, is sliding fit through cover block and sleeve again, can ensure that branch keeps the level unanimous, can not take place the slope, fixed mounting has the second spring in the sleeve, the second spring is in between cover block and the sleeve, and the elastic force effect through the second spring can promote the cover block to the perforation department, conveniently ensures that branch has the shrink space, the one end fixed mounting of branch has the guard ring, fixed mounting has the screw in the guard ring, can ensure through the guard ring that the screw can not receive direct collision, utilizes the guard ring to extrude branch to let branch drive the cover block and compress the second spring, absorb the impact force through the deformation process of second spring to can also can contract branch in the sleeve, ensure that the lantern ring removes the lantern ring with the guard ring.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the unmanned aerial vehicle, the simulation device is arranged, so that the unmanned aerial vehicle can reflect interference signals to the radar device by driving the luneberg ball, the load of the unmanned aerial vehicle can be reduced, the unmanned aerial vehicle can take off more easily, and the cruising ability is enhanced.
2. Through setting up the signal transmission subassembly, firstly, through the starter motor, make the motor drive the swing piece and swing, thereby the holding ring that drives swing piece looks block removes, and then the drive removes post and the fine setting part and the antenna of connecting and remove, remove the post and remove the in-process, because the intermeshing effect of annular rack and toothed disc, thereby it rotates at the removal in-process to drive the removal post, wherein remove a section of thick bamboo and can be under the effect of spacing post at the rotation in-process, it carries out angle modulation to drive the antenna, can increase the receiving range of antenna, thereby make the initial signal of antenna reception radar installation transmission.
3. Through setting up the signal interference subassembly, specifically restrict initial signal amplitude in certain extent through the amplitude limiter, the coupler can divide into the multichannel with the microwave power signal of the same way in certain amplitude range in proportion, rethread first power divider, second power divider and third power divider divide into multichannel input signal energy respectively and export equal or unequal energy, later adjust the signal size in this circuit through the numerical control attenuator, again by first digital radio frequency memory and second digital radio frequency memory with the electric wave of the certain emission frequency after adjusting store and forward, thereby can give radar installation main lobe with target simulation and interfering signal transmission, and then can improve interference effect.
4. Be provided with guide assembly and buffer assembly, when unmanned aerial vehicle runs into the interference air current in the air flight, the interference air current on upper portion can get into the cavity one of cover ring pipe through the hole of induced drafting, and weaken the impact of interference air current to the cover ring pipe outside, drainage through the guide board can be with interfering in the air current carries to connecting hole one, owing to use connecting pipe connection connecting hole one and connecting hole two, the connecting pipe can carry the interference air current on upper portion in the box body, again because the trompil can conveniently let the interference air current of unmanned aerial vehicle lower part directly enter into the cavity two of box body, through the guide of expanding the board outward, make the interference air current blow turbofan through the through-hole, turbofan can take place the rotation under the effort that interferes with the air current, produce the air current downwards, produce ascending effort, rotate produced air current downwards through the hole with turbofan through airing exhaust at last, be favorable to unmanned aerial vehicle steady flight, avoid receiving the influence that interferes with the air current, and can reduce the power consumption of unmanned aerial vehicle battery.
5. Be provided with and dodge subassembly and shrink subassembly, when unmanned aerial vehicle's wing received the collision, can ensure through the protection ring that the screw can not receive direct collision, utilize the protection ring to extrude branch, thereby let branch drive the cover block and compress the second spring, the deformation process through the second spring absorbs the impact force, and can also shrink branch to the sleeve in, the guarantee protection ring removes the within range that the lantern ring pipe protected through slider extrusion first spring with the screw, here the sleeve drives the slider and slides on the bent axle, extrude first spring, can make the wing take place the skew when reaching further absorption impact force through the compression second spring, and then reach the effect of dodging.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a perspective view of an interference housing structure of a device for realizing radar main lobe target simulation and interference based on ground-air combination according to the present invention;
FIG. 2 is a perspective view of a signal transmission assembly structure of the device for realizing radar main lobe target simulation and interference based on ground-air combination;
FIG. 3 is a three-dimensional sectional view of a signal transmission assembly of the device for realizing radar main lobe target simulation and interference based on ground-air integration;
FIG. 4 is an enlarged structural view of a point A in FIG. 3 of the device for realizing radar main lobe target simulation and interference based on ground-air union of the present invention;
FIG. 5 is a perspective view of a swing block structure of the device for realizing radar main lobe target simulation and interference based on ground-air union;
FIG. 6 is a perspective view of a positioning cylinder and a connection structure thereof of the device for realizing radar main lobe target simulation and interference based on ground-air union;
FIG. 7 is an enlarged structural view of a device for realizing radar main lobe target simulation and interference based on ground-air combination in FIG. 6 at B;
FIG. 8 is a perspective view of a structure of a mobile cylinder of the device for realizing radar main lobe target simulation and interference based on ground-air integration;
FIG. 9 is a three-dimensional cross-sectional view of the internal structure of an interference housing of the device for realizing radar main lobe target simulation and interference based on ground-air integration
FIG. 10 is a schematic diagram of an unmanned aerial vehicle main view structure of the device for realizing radar main lobe target simulation and interference based on ground-air integration;
FIG. 11 is a schematic view of an unmanned aerial vehicle overhead structure of the device for realizing radar main lobe target simulation and interference based on ground-air integration;
FIG. 12 is a schematic view of a main section cutting structure of an unmanned aerial vehicle of the device for realizing radar main lobe target simulation and interference based on ground-air integration;
fig. 13 is an enlarged structural diagram of a point a in fig. 12 of the device for realizing radar main lobe target simulation and interference based on ground-air union of the present invention;
FIG. 14 is an enlarged structural diagram at b in FIG. 12 of an apparatus for implementing radar main lobe target simulation and interference based on ground-air union of the present invention;
FIG. 15 is a cross-sectional view of a cushioning assembly;
FIG. 16 is a schematic view of the gas flow;
FIG. 17 is a schematic diagram of a target and interference housing of an apparatus for ground-based radar main lobe target simulation and interference of the present invention;
FIG. 18 is an enlarged structural view of a ground device for simulating and interfering with a radar main lobe target, shown in FIG. 14D, according to the present invention;
FIG. 19 is a system block diagram of a device for realizing radar main lobe target simulation and interference on the ground.
In the figure: 1. an unmanned aerial vehicle; 2. a cross bar; 3. a sleeving pipe;
4. a guide assembly; 401. a connecting rod; 402. a box body; 403. an air suction hole;
404. a first cavity; 405. a guide plate; 406. a first connecting hole; 407. a second connecting hole;
408. a connecting pipe;
5. a buffer assembly; 501. opening a hole; 502. a second cavity; 503. fixing a rod I;
504. a fixing ring; 505. a second fixing rod; 506. a fixing plate; 507. a connecting rod;
508. a turbo fan; 509. a through hole; 510. an air exhaust hole;
6. an avoidance assembly; 601. a fixed block; 602. a crankshaft; 603. a slider;
604. a slide hole; 605. a first spring;
7. a retraction assembly; 701. a sleeve; 702. perforating; 703. a strut;
704. sleeving blocks; 705. a second spring; 706. a guard ring; 707. a propeller;
8. connecting blocks; 9. an outward expansion plate; 10. an interference housing; 11. an antenna; 12. installing a frame; 13. a gear plate; 14. an annular rack; 15. moving the column; 16. a main circuit board; 17. an amplitude limiter; 18. a coupler; 19. a numerical control attenuator; 20. a first power divider; 21. a second power divider; 22. a third power divider; 23. a first digital radio frequency memory; 24. a signal generator; 25. a motor; 26. a swing block; 27. a positioning ring; 28. positioning a rod; 29. a positioning cylinder; 30. moving the drum; 31. a limiting column; 32. a fixed mount; 33. a second digital radio frequency memory; 34. a wave groove; 35. a dragon ball.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example (b): as shown in fig. 1 to 19, the present invention provides the following technical solutions: the device for realizing the simulation and the interference of the radar main lobe target based on the ground-air union comprises a simulation device and an interference device in communication connection with the radar device, wherein the interference device comprises an interference shell 10, a signal transmission component and a signal interference component, the signal transmission component and the signal interference component are arranged on the interference shell 10, the simulation device comprises an unmanned aerial vehicle 1 and a dragon ball 35 arranged below the unmanned aerial vehicle 1, the dragon ball 35 is used for reflecting signals, a cross rod 2 is fixedly arranged on the unmanned aerial vehicle 1, a sleeve pipe 3 is fixedly arranged on the cross rod 2, the sleeve pipe 3 is conveniently fixed through the cross rod 2, the unmanned aerial vehicle 1 is located in the sleeve pipe 3, the unmanned aerial vehicle 1 can be protected from direct collision with the outside while playing a role of air suction conduction through the sleeve pipe 3, a guide component 4 is fixedly arranged on the unmanned aerial vehicle 1, the guide component 4 can guide the interference airflow, a power source is provided for the buffer component 5, the buffer component 5 is fixedly connected with the guide component 4 and can rotate the airflow guided by the guide component 4, the interference airflow is uniformly discharged downwards, the stable emission of the interference airflow is facilitated, and the power consumption of the unmanned aerial vehicle is reduced.
As shown in fig. 1-3, the signal transmission assembly includes antenna 11, installing frame 12, toothed disc 13, annular rack 14, removal post 15 and driver part, installing frame 12 fixed mounting is in disturbing casing 10 side, it sets up inside installing frame 12 to remove the activity of post 15, just it all extends to outside installing frame 12 to remove the post 15 upper and lower both ends, antenna 11 is connected with removal post 15 top through fine setting part, annular rack 14 cover is established on removing post 15 surface, toothed disc 13 sets up inside installing frame 12 and meshes with annular rack 14 mutually, driver part is used for driving and removes post 15 and removes, antenna 11 is used for receiving initial signal, initial signal is the signal of radar installation initial transmission.
As shown in fig. 1-9, the signal interference component includes a main circuit board 16, and a limiter 17, a coupler 18, a digitally controlled attenuator 19, a first power divider 20, a second power divider 21, a third power divider 22, a first digital rf memory 23, a second digital rf memory 33 and a signal generator 24 disposed on the main circuit board 16;
the amplitude limiter 17 is configured to limit an initial signal amplitude within a certain range, the coupler 18 is configured to divide a path of microwave power signal within the certain amplitude range into a first path of signal and a second path of signal in proportion, the first power divider 20 is configured to divide the first signal into a third signal and a fourth signal, the digitally controlled attenuator 19 is configured to delay and amplify the first signal, the second power divider 21 divides the amplified first signal into a fifth signal and a sixth signal, the first digital radio frequency memory 23 and the second digital radio frequency memory 33 are respectively configured to store and forward the fifth signal and the sixth signal, the signal generator 24 transmits a seventh signal carrying noise, the fifth signal, the sixth signal and the seventh signal are reversely superimposed by the third power divider 22 to form an interference signal, and are transmitted through the antenna 11, the luneberg ball 35 reflects the interference signal transmitted by the antenna 11, and the radar apparatus receives the interference signal reflected by the luneberg ball 35.
As shown in fig. 4-5, the driving part includes a motor 25, a swing block 26 and a positioning ring 27, the motor 25 is fixedly mounted on the inner bottom wall of the mounting frame 12, one end of the swing block 26 is fixedly connected with the output end of the motor 25, the positioning ring 27 is sleeved on the outer surface of the movable column 15 and is clamped with the swing block 26, one end of the swing block 26, which is far away from the motor 25, is provided with a groove, the positioning ring 27 is movably arranged in the groove and rotates in the groove, the inner wall of the groove of the swing block 26 is fixedly connected with a positioning rod 28, and the positioning groove matched with the positioning rod 28 is arranged on the outer side of the positioning ring 27.
As shown in fig. 6-7, the fine adjustment component includes a positioning cylinder 29, a movable cylinder 30 and a limiting column 31, the positioning cylinder 29 is fixedly connected with the top end of the movable column 15, the movable cylinder 30 is movably arranged inside the positioning cylinder 29, the limiting column 31 is fixedly arranged on the inner wall of the positioning cylinder 29, a wave groove 34 matched with the limiting column 31 is formed in the outer surface of the movable cylinder 30, the antenna 11 is fixedly connected with the inner wall of the movable cylinder 30, a fixing frame 32 is sleeved on the side surface of the antenna 11, and the bottom of the fixing frame 32 is fixedly connected with the inner wall of the movable cylinder 30.
The motor 25 is started to drive the swing block 26 to swing, so that the positioning ring 27 clamped by the swing block 26 is driven to move, the moving column 15, a fine adjustment component connected with the moving column and the antenna 11 are driven to move, in the moving process of the moving column 15, due to the mutual meshing action of the annular rack 14 and the gear disc 13, the moving column 15 is driven to rotate in the moving process, the moving cylinder 30 can drive the antenna 11 to carry out angle adjustment under the action of the limiting column 31 in the rotating process, so that the antenna 11 receives an initial signal transmitted by a radar device, and then transmits the initial signal to an interference component for processing, the processed interference signal transmits the signal to the luneberg ball 35, and then the luneberg ball 35 reflects the interference signal to a radar main lobe;
the specific process of signal interference is as follows: the antenna 11 transmits the received initial signal to the limiter 17, the amplitude of the initial signal transmitted by the radar is limited within a certain range by the limiter 17, the initial signal is transmitted to the coupler 18, the input signal is divided into a first signal and a second signal by the coupler 18 in proportion, the second signal is divided into a DLVA wave reduction output circuit and a frequency measurement circuit by the first power divider 20, the first signal is subjected to delay amplification by the numerical control attenuator 19, then the first signal is subjected to filtering processing by the filter through inputting a 1GHz local oscillation stepping signal to form a signal with the frequency of 2.75-4.25G, then a 100MHz local oscillation stepping signal is input, the first signal is subjected to filtering processing by the filter to form a signal with the frequency of 1.2-1.8G, then the first signal is divided into a third signal and a fourth signal by the second power divider 21, the third signal is output by the first digital radio frequency memory 23, then the 2400MHZ signal is processed and output by the 2G module through filtering wave, then the 3.6-4.2Hz signal is synthesized, the fourth signal passes through the second digital radio frequency memory 33, then the 1.2-1.8Hz signal is processed and output by the filtering wave, then the 2400MHz signal is output by the 2G module through filtering wave, finally the 3.6-4.2Hz signal is synthesized through filtering wave, the seventh signal with the frequency of 1.2-1.8G and the eighth signal with the frequency of 2.4GHz are sent out by the signal generator 24, the signal with the frequency of 3.6-4.2Hz synthesized by the eighth signal and the second digital radio frequency memory 33, the superimposed signal with the frequency of 1.2-1.8Hz is synthesized through filtering wave, the third signal with the frequency of 3.6-4.2Hz and the eighth signal formed by the first digital radio frequency memory 23 are synthesized into the signal with the frequency of 1.2-1.8Hz, and finally the fifth signal, the sixth signal and the seventh signal are simultaneously converted into the signal with the frequency of 1.2-1.8Hz by the third power distributor 22, then, a 1GHz local oscillator stepping signal is input, a filter performs filtering processing to form a signal with the frequency of 2.75-4.25G, a 100MHz local oscillator stepping signal is input, finally, filtering is performed through the filter, target simulation and interference signals are output, the signal is reflected to a radar device through a Luneberg ball 35, the antenna 11 is an ultra-wideband antenna, a used super-dielectric structure is formed by a capacitor loading band (CLS) providing a negative dielectric constant and an open resonant ring (SRR) providing a negative magnetic conductivity, compared with an original narrow-band microstrip antenna, electromagnetic simulation software HFSS is used for performing structural design on the super-dielectric, so that multiple resonance points which are uniformly distributed can be generated in an ultra-wideband frequency band, electromagnetic parameter extraction is performed on the super-dielectric, and microwave signals are received.
As shown in fig. 10-13, the guide assembly 4 includes a connection rod 401, a box body 402, an air suction hole 403, a cavity one 404, a guide plate 405, a connection hole one 406, a connection hole two 407, and a connection pipe 408;
the bottom fixed mounting of unmanned aerial vehicle 1 has connecting rod 401, the lower extreme fixed mounting of connecting rod 401 has box body 402, the lateral wall all around of box body 402 is V type structure, conveniently guide the interference air current and flow into in box body 402, conveniently fix box body 402 in unmanned aerial vehicle's bottom through connecting rod 401, connecting hole two 407 has been seted up on box body 402, make things convenient for the air current to enter into in the box body 402 through connecting hole two 407, air suction hole 403 has been seted up on the outside lateral wall of lantern ring pipe 3, can inhale the interference air current into lantern ring pipe 3 through air suction hole 403, weaken the impact of interference air current to the lantern ring pipe 3 outside, and be equipped with cavity one 404 in the lantern ring pipe 3, air suction hole 403 is the bell mouth, outer width is interior narrow, can weaken the impact of interference air current to lantern ring pipe 3 outer wall when, and inhale the interference air current into lantern ring pipe 3, cavity one 404 is favorable to the flow of air current, fixed mounting has the guide board in the cavity one 404, guide board 405 is the setting of outer splayed, can flow according to the air current flow through the guide board 405 through the guide effect of guide board 405, 406 can flow according to specific direction, 406 in the inside the lateral wall middle part of lantern ring pipe 406 of lantern ring pipe 3, 406 can be connected with the connecting hole 406 through connecting pipe 406, 406 can be connected with the connecting pipe 408 through connecting pipe 408 guide the connecting pipe 406, 406 connection pipe 408 in 406.
As shown in fig. 10 to 13 and 15, the cushion assembly 5 includes an opening 501, a second cavity 502, a first fixing rod 503, a fixing ring 504, a second fixing rod 505, a fixing plate 506, a connecting rod 507, a turbo fan 508, a through hole 509, and an exhaust hole 510;
the lateral wall middle part of box body 402 has been seted up trompil 501, and be equipped with cavity two 502 in the box body 402, fixed mounting has connecting block 8 between trompil 501, connecting block 8 is isosceles triangle piece, its point portion is outside, connecting block 8 is when playing the connection effect, make things convenient for the interference air current to enter into cavity two 502, can not cause the hindrance to the flow of air current, make things convenient for the interference air current of unmanned aerial vehicle 1 lower part to enter into cavity two 502 of box body 402 through trompil 501, annular fixed mounting has dead lever one 503 in cavity 502, fixed lever one 503 has fixed ring 504, conveniently fix fixed ring 504 in cavity two 503 through dead lever one 503, fixed ring 504 in symmetry fixed ring has dead lever two 505, fixed lever two 505 between fixed lever two 505 fixed plate has fixed plate 506, conveniently fix fixed plate 506 in the centre of fixed ring 504 through dead lever two 505, fixed mounting has connecting rod 507 between fixed plate 506, the last turbofan 508 of rotating mounting of connecting rod 507, turbofan 508 can be under the effort that the interference air current takes place the rotation, produce the air current downwards, the effort that rises, the effort has evenly been seted up on the outer wall of fixed ring 504, the department slope of through-hole 509 installs outer expanding board 9 and can be convenient with the air current that two air current guide in cavity two pass through the exhaust fan 510 and carry out the convenient exhaust fan 510, the bottom exhaust hole 510 that the exhaust fan 510 that the bottom air current flows and carry out the convenient fan 510 that the box body 510 that the rotation is carried out, the box body 402.
Fixed mounting has dodges subassembly 6 on unmanned aerial vehicle 1, dodges subassembly 6 and is used for realizing that control sleeve 701 can remove when the collision, avoids taking place to roll over and decreases the deformation, dodges and is provided with shrink component 7 on the subassembly 6, through shrink component 7 can absorb the impact force when colliding, avoids screw 707 impaired.
As shown in fig. 10-12, the avoidance component 6 includes a fixed block 601, a crankshaft 602, a slider 603, a sliding hole 604, and a first spring 605;
the fixed block 601 is symmetrically and fixedly mounted on the unmanned aerial vehicle 1, a crankshaft 602 is fixedly mounted in the fixed block 601, the crankshaft 602 is an arc rod, an arc line passing through the crankshaft 602 facilitates inward movement of the slider 603, the slider 603 is slidably mounted on the crankshaft 602, a sliding hole 604 is formed in the slider 603, the crankshaft 602 penetrates through the sliding hole 604, due to the fact that the sliding hole 604 is in sliding fit with the crankshaft 602, the slider 603 slides on the crankshaft 602, a first spring 605 is fixedly mounted on the crankshaft 602, the first spring 605 is located between the fixed block 601 and the slider 603, the slider 603 can be fixed at the top of the crankshaft 602 through the elastic action of the first spring 605, and the wings extrude the first spring 605 through the slider 603 when being collided, so that the wings are deviated, and the avoiding effect is achieved.
As shown in fig. 10-12 and 14, retraction assembly 7 comprises a sleeve 701, a perforation 702, a strut 703, a nest block 704, a second spring 705, a guard ring 706, a propeller 707;
a sleeve 701 is fixedly installed on the sliding block 603, a through hole 702 is formed in one side of the sleeve 701, a supporting rod 703 penetrates through the through hole 702, the supporting rod 703 extends into the sleeve 701, the supporting rod 703 is convenient to move in the sleeve 701 through the through hole 702, a sleeve block 704 is fixedly installed at one end of the supporting rod 703, the sleeve block 704 is slidably installed in the sleeve 701, the supporting rod 703 can be prevented from being separated from the sleeve 701 through the sleeve block 704, the sleeve block 704 is in sliding fit with the sleeve 701, the supporting rod 703 can be kept in a horizontal consistent state and cannot incline, a second spring 705 is fixedly installed in the sleeve 701, the second spring 705 is located between the sleeve block 704 and the sleeve 701, the sleeve block 704 can be pushed to the through hole 702 through the elastic force of the second spring 705, the fact that the supporting rod 703 has a contraction space is conveniently guaranteed, a protection ring 706 is fixedly installed at one end of the supporting rod 703, a propeller 707 is fixedly installed in the protection ring 706, the propeller 707 can be guaranteed not to be directly collided through the protection ring 706, the propeller 706 is squeezed by the protection ring 706, and the supporting rod 703 is driven by the sleeve block 704 to compress the second spring 704, the propeller 703 can be further, the impact force of the propeller 703 can be absorbed in the contraction range of the sleeve 703 and can be guaranteed, the sleeve 703, the protection ring 703 can be moved to the range of the sleeve 703, and the range of the sleeve 703, the range of the impact force of the sleeve 703 can be guaranteed.
The working principle of the invention is as follows:
according to the invention, the simulation device is arranged, so that the unmanned aerial vehicle 1 reflects the interference signal to the radar device by driving the luneberg ball 35, the load of the unmanned aerial vehicle 1 can be reduced, the unmanned aerial vehicle 1 can take off more easily, and the cruising ability is enhanced.
Through setting up the signal transmission subassembly, firstly, through starter motor 25, make motor 25 drive swing piece 26 and swing, thereby drive holding ring 27 of swing piece 26 looks block and remove, and then drive and remove post 15 and the fine setting part and the antenna 11 of connecting and remove, remove post 15 and remove the in-process, because the intermeshing of annular rack 14 and toothed disc 13, thereby it rotates at the removal in-process to drive and remove post 15, wherein remove a section of thick bamboo 30 and can be under spacing post 31's effect at the rotation in-process, it carries out angle modulation to drive antenna 11, can increase antenna 11's receiving range, thereby make antenna 11 receive the initial signal of radar installation transmission.
By arranging a signal interference component, specifically limiting the amplitude of an initial signal within a certain range through an amplitude limiter 17, a coupler 18 can divide one path of microwave power signal within a certain amplitude range into multiple paths in proportion, then a first power divider 20, a second power divider 21 and a third power divider 22 divide the energy of multiple paths of input signals into multiple paths of energy which are output equally or unequally, then the signal size in the circuit is adjusted through a numerical control attenuator 19, and then a first digital radio frequency memory 23 and a second digital radio frequency memory 33 store and forward the adjusted electric wave with a certain transmitting frequency, so that a target simulation and an interference signal can be transmitted to a main lobe of a radar device, and the interference effect can be improved.
When the unmanned aerial vehicle 1 encounters an interference airflow during flying in the air, the interference airflow at the upper part can enter the first cavity 404 of the sleeve pipe 3 through the air suction hole 403, and the impact of the interference airflow on the outside of the sleeve pipe 3 is weakened, the interference airflow can be conveyed into the first connecting hole 406 through the drainage of the guide plate 405, the first connecting hole 406 and the second connecting hole 407 are connected through the connecting pipe 408, the interference airflow at the upper part can be conveyed into the box body 402 through the connecting pipe 408, the interference airflow at the lower part of the unmanned aerial vehicle can conveniently enter the second cavity 502 of the box body 402 through the opening 501, and the interference airflow is blown to the turbofan 508 through the through hole 509 by guiding the outer expansion plate 9, so that the turbofan 508 can rotate under the action force of the interference airflow to generate an airflow downwards to generate an ascending action force, and finally the airflow generated by rotating the turbofan 508 is downwards discharged through the air exhaust hole 510, thereby being beneficial to stable flying of the unmanned aerial vehicle 1 and avoiding the influence of the interference airflow, and reducing the power consumption of the battery of the unmanned aerial vehicle 1.
Then when the wings of the unmanned aerial vehicle are collided, the propeller 707 can be ensured not to be directly collided through the protection ring 706, the support rod 703 is extruded through the protection ring 706, so that the support rod 703 drives the sleeve block 704 to compress the second spring 705, the impact force is absorbed through the deformation process of the second spring 705, the support rod 703 can be contracted into the sleeve 701, the protection ring 706 and the propeller 707 are ensured to move to the range protected by the sleeve pipe 3 to extrude the first spring 605 through the sliding block 603, meanwhile, the sleeve 701 drives the sliding block 603 to slide on the crankshaft 602 to extrude the first spring 605, the impact force is further absorbed through compressing the second spring 705, and meanwhile, the wings can be deflected, so that the effect of avoiding is achieved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The device for realizing radar main lobe target simulation and interference based on ground-air combination is characterized in that: this equipment of realization radar main lobe target simulation and interference based on ground-air is united includes analogue means, radar equipment communication connection's interference unit, interference unit is including interfering casing (10) and setting signal transmission subassembly and the signal interference subassembly on interfering casing (10), analogue means includes unmanned aerial vehicle (1) and dragon Bo ball (35) of setting in unmanned aerial vehicle (1) below, dragon Bo ball (35) are used for the reflected signal, fixed mounting has horizontal pole (2) on unmanned aerial vehicle (1), fixed mounting has set ring pipe (3) on horizontal pole (2), and unmanned aerial vehicle (1) is in set ring pipe (3), fixed mounting has guide subassembly (4) on unmanned aerial vehicle (1), fixedly connected with buffering subassembly (5) on guide subassembly (4).
2. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 1, wherein: the signal transmission subassembly includes antenna (11), installing frame (12), toothed disc (13), annular rack (14), removes post (15) and driver part, installing frame (12) fixed mounting is in disturbing casing (10) side, it sets up inside installing frame (12) to remove post (15) activity, just it all extends to outside installing frame (12) to remove post (15) both ends from top to bottom, antenna (11) are connected with removal post (15) top through fine setting part, annular rack (14) cover is established at removal post (15) surface, toothed disc (13) set up inside installing frame (12) and mesh mutually with annular rack (14), driver part is used for driving and removes post (15), antenna (11) are used for receiving initial signal, initial signal does the signal of radar installation first transmission.
3. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 2, wherein: the signal interference component comprises a main circuit board (16), and an amplitude limiter (17), a coupler (18), a numerical control attenuator (19), a first power divider (20), a second power divider (21), a third power divider (22), a first digital radio frequency memory (23), a second digital radio frequency memory (33) and a signal generator (24) which are arranged on the main circuit board (16);
the amplitude limiter (17) is used for limiting the amplitude of an initial signal within a certain range, the coupler (18) is used for dividing one path of microwave power signal within the certain amplitude range into a first path of signal and a second path of signal in proportion, the first power divider (20) is used for dividing the first signal into a third signal and a fourth signal, the numerical control attenuator (19) is used for delaying and amplifying the first signal, the second power divider (21) is used for dividing the amplified first signal into a fifth signal and a sixth signal, the first digital radio frequency memory (23) and the second digital radio frequency memory (33) are respectively used for storing and forwarding the fifth signal and the sixth signal, the signal generator (24) transmits a seventh signal carrying noise, the fifth signal, the sixth signal and the seventh signal are reversely superposed into interference signals through the third power divider (22) and transmitted through the antenna (11), the luneberg ball (35) reflects the interference signals transmitted by the antenna (11), and the radar device receives the luneberg ball (35) reflected interference signals.
4. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 3, wherein: the drive assembly includes motor (25), swing piece (26) and holding ring (27), diapire in installing frame (12) is installed to motor (25) fixed mounting, the output fixed connection of swing piece (26) one end and motor (25), holding ring (27) cover is established and is just blocked with swing piece (26) looks at the surface that removes post (15), the one end of keeping away from motor (25) in swing piece (26) is seted up flutedly, holding ring (27) activity sets up inside the recess and rotates inside the recess, the recess inner wall fixedly connected with locating lever (28) of swing piece (26), the constant head tank with locating lever (28) looks adaptation is seted up in holding ring (27) outside.
5. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 4, wherein: the fine setting part is including a location section of thick bamboo (29), a removal section of thick bamboo (30) and spacing post (31), a location section of thick bamboo (29) and removal post (15) top fixed connection, it sets up inside a location section of thick bamboo (29) to move a section of thick bamboo (30) activity, spacing post (31) fixed mounting is at a location section of thick bamboo (29) inner wall, just wave groove (34) with spacing post (31) looks adaptation are seted up to a removal section of thick bamboo (30) surface, antenna (11) and removal section of thick bamboo (30) inner wall fixed connection, just antenna (11) side cover is equipped with mount (32), mount (32) bottom and removal section of thick bamboo (30) inner wall fixed connection.
6. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 5, wherein: the guide assembly (4) comprises a connecting rod (401), a box body (402), an air suction hole (403), a first cavity (404), a guide plate (405), a first connecting hole (406), a second connecting hole (407) and a connecting pipe (408);
the bottom fixed mounting of unmanned aerial vehicle (1) has connecting rod (401), the lower extreme fixed mounting of connecting rod (401) has box body (402), the lateral wall all around of box body (402) is V type structure, connecting hole two (407) have been seted up on box body (402), hole (403) of induced drafting has been seted up on the outside lateral wall of cover ring pipe (3), and is equipped with cavity one (404) in the cover ring pipe (3), hole (403) of induced drafting is the bell mouth, and is outer wide narrow in, fixed mounting has guide board (405) in cavity one (404), guide board (405) are outer eight characters type setting, connecting hole one (406) has been seted up at the internal diameter lateral wall middle part of cover ring pipe (3), fixedly connected with connecting pipe (408) between connecting hole one (406) and connecting hole two (407).
7. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 6, wherein: the buffer component (5) comprises an opening (501), a cavity II (502), a fixing rod I (503), a fixing ring (504), a fixing rod II (505), a fixing plate (506), a connecting rod (507), a turbofan (508), a through hole (509) and an exhaust hole (510);
trompil (501) has been seted up at the lateral wall middle part of box body (402), and is equipped with cavity two (502) in box body (402), fixed mounting has connecting block (8) between trompil (501), connecting block (8) are isosceles triangle piece, and its point portion is external, cavity two (502) inner ring form fixed mounting has dead lever (503), fixed mounting has solid fixed ring (504) between dead lever (503), gu fixed ring (504) inner symmetry fixed mounting has dead lever two (505), gu fixed mounting has fixed plate (506) between two (505), fixed mounting has connecting rod (507) between fixed plate (506), rotating on connecting rod (507) and installing turbofan (508), through-hole (509) have evenly been seted up on the outer wall of solid fixed ring (504), outer expanding board (9) are installed in the slope of the drill way department of through-hole (509), box body hole (510) of airing exhaust has been seted up in the middle part of the bottom of box body (402).
8. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 7, wherein: fixed mounting has dodges subassembly (6) on unmanned aerial vehicle (1), be provided with shrink subassembly (7) on dodging subassembly (6).
9. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 8, wherein: the avoidance assembly (6) comprises a fixed block (601), a crankshaft (602), a sliding block (603), a sliding hole (604) and a first spring (605);
unmanned aerial vehicle (1) is gone up symmetry fixed mounting and has fixed block (601), fixed mounting has bent axle (602) in fixed block (601), bent axle (602) are the arc pole, slidable mounting has slider (603) on bent axle (602), slotted hole (604) have been seted up on slider (603), bent axle (602) run through slotted hole (604), fixed mounting has first spring (605) on bent axle (602), first spring (605) are in between fixed block (601) and slider (603).
10. The device for realizing radar main lobe target simulation and interference based on ground-air combination according to claim 9, wherein: the retraction assembly (7) comprises a sleeve (701), a perforation (702), a support rod (703), a sleeve block (704), a second spring (705), a protection ring (706) and a propeller (707);
fixed mounting has sleeve (701) on slider (603), perforation (702) are seted up to one side of sleeve (701), it has branch (703) to run through in perforation (702), branch (703) extend and are extended to in sleeve (701), the one end fixed mounting of branch (703) has a cover block (704), cover block (704) slidable mounting is in sleeve (701), fixed mounting has second spring (705) in sleeve (701), second spring (705) are in between cover block (704) and sleeve (701), the one end fixed mounting of branch (703) has protection ring (706), fixed mounting has screw propeller (707) in protection ring (706).
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| CN115542252B (en) | 2023-07-04 |
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