CN111913151A - Vehicle-mounted active phased array radar - Google Patents
Vehicle-mounted active phased array radar Download PDFInfo
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- CN111913151A CN111913151A CN202010827773.2A CN202010827773A CN111913151A CN 111913151 A CN111913151 A CN 111913151A CN 202010827773 A CN202010827773 A CN 202010827773A CN 111913151 A CN111913151 A CN 111913151A
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- radar
- radar module
- phased array
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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
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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
- 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
- G01S13/88—Radar or analogous systems specially adapted for specific applications
Abstract
The invention discloses a vehicle-mounted active phased array radar.A radar module can perform rotary motion under the action of a rotary scanning driving module and can greatly adjust the pitching angle of the radar module relative to a horizontal plane; the radar module can adjust the every single move angle of its relative horizontal plane by a small margin under the effect of circulation scanning drive module to can make reciprocal side pendulum action periodically, with can monitor the target object accurately in less within range, enlarged the detection range of radar module, and promoted the detection efficiency of radar module. The antenna unit is arranged on the bearing plate, and the ventilation holes communicated with the cavity structure are opposite to the antenna unit, so that the antenna unit can be cooled by blowing; because the loading board cavity sets up and does not set up plus heat dissipation mechanism for phased array active radar's structure is simpler, and volume and weight are lighter and more handy.
Description
Technical Field
The invention relates to the technical field of radar monitoring, in particular to a vehicle-mounted active phased array radar.
Background
The vehicle-mounted active phased array radar antenna is large in size, complex in structure and high in design requirement, and when scanning is carried out, the phased array radar is required to complete rotation, pitching and other actions, and vehicle-mounted requirements are also met. The existing phased array radar action executing mechanism is complex in structure and poor in action flexibility, and multi-dimensional action requirements are difficult to achieve.
In addition, a large number of T/R modules with high density are installed in the active phased array radar antenna, and because the T/R modules comprise miniaturized microwave integrated circuits, a large amount of heat can be generated during working, the temperature of the modules is increased rapidly, the performance and the service life of the phased array radar antenna can be influenced undoubtedly by overhigh temperature, and therefore the heat dissipation design is increasingly important in the active phased array antenna. At present, the heat dissipation mode of the active phased array radar antenna mainly depends on a cooling plate, the capability of the heat dissipation mode in severe environment resistance is poor, the size and the quality of equipment can be increased by an external application heat dissipation mode, and the trend of volume reduction of the active phased array radar cannot be met.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides a vehicle-mounted active phased array radar.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an active phased array radar for vehicle use, comprising: a rotary scanning driving module fixed on the vehicle body; the circulating scanning driving module is fixed on the rotary scanning driving module; the radar module is connected with the cyclic scanning driving module and used for finding a target object by utilizing electromagnetic waves and measuring the spatial position of the target object; the rotary scanning driving module can drive the radar module to rotate circumferentially and can adjust the pitching angle of the radar module relative to the horizontal plane; the cyclic scanning driving module can further adjust the pitching angle of the radar module relative to the horizontal plane and can drive the radar module to perform reciprocating side-swinging action so as to enlarge the detection range of the radar module and improve the detection efficiency of the radar module;
the radar module comprises a bearing plate with a main plate cavity formed inside; and a plurality of antenna units fixed on the bearing plate in an array manner; wherein, the main board cavity is connected with the fan in a ventilation way; the bearing plate is provided with a plurality of ventilation holes communicated with the main board cavity so as to guide air to the antenna unit and dissipate heat generated by the antenna unit.
Preferably, the rotary scanning driving module comprises a base fixed on the vehicle body, and the base is provided with a bottom surface parallel to the horizontal plane and a top surface with an included angle with the horizontal plane; the first rotating seat is rotatably arranged on the base and is provided with a bottom surface parallel to the top surface of the base and a top surface parallel to the horizontal plane; the second rotating seat is rotatably arranged on the first rotating seat and is parallel to the top surface of the first rotating seat; the first motor is used for driving the first rotating seat to rotate; the second motor is used for driving the second rotating seat to rotate; when the first rotating seat rotates relative to the base, the included angle between the top surface of the first rotating seat and the horizontal plane can be continuously and periodically changed, so that the pitching angle of the radar module relative to the horizontal plane can be adjusted.
Preferably, a limiting assembly is arranged between the base and the first rotating base so as to limit the position of the first rotating base when the base and the first rotating base rotate relatively; the limiting assembly comprises an annular guide groove and a first annular accommodating groove which are arranged on the bottom surface of the first rotating seat; the annular boss and the second annular accommodating groove are arranged on the top surface of the base; and a plurality of rolling balls; the annular boss is slidably embedded in the annular guide groove; the first annular containing groove and the second annular containing groove are equal in size and are arranged oppositely; the rolling balls are arranged in the first annular containing groove and the second annular containing groove so as to reduce the rotating friction force between the base and the first rotating seat, and the position between the base and the first rotating seat can be limited.
Preferably, a first chamfer is formed at the outer edge of the top surface of the base, and a second chamfer is formed at the outer edge of the bottom surface of the first rotating seat; the first chamfer angle and the second chamfer angle jointly form an annular connecting part gap; a sealing ferrule is arranged in the gap of the joint to prevent foreign matters from entering between the base and the first rotating seat; the section of the sealing ferrule is basically triangular; a connecting gap is arranged on the sealing sleeve ring, and the two sides of the connecting gap are both formed with a sleeve ring connecting arm; wherein, the two ferrule connecting arms are detachably connected through a connecting bolt.
Preferably, the sealing ferrule is provided with a ferrule inner cavity and a plurality of flow channels communicated with the ferrule inner cavity; wherein, the inner cavity of the ferrule contains lubricating oil; the flow channel is arranged at the inner ring position of the sealing ferrule and is right opposite to the gap at the connecting part, so that lubricating oil can be continuously dripped into the mounting gap between the base and the first rotating seat to achieve the lubricating effect; the sealing ring and the first rotating seat are arranged in a synchronous rotating mode.
Preferably, the cyclic scanning driving module comprises a main positioning frame fixed on the second rotating seat, and one end part of the main positioning frame is universally hinged on the radar module; the first reciprocating driver is used for linking the radar module to perform reciprocating side swinging action; the second reciprocating driver is used for linking the radar module to perform reciprocating pitching motion; wherein, first reciprocal driver and second reciprocal driver structure are the same, and both all universal hinges on the radar module.
Preferably, the radar module is provided with a first articulated ball head, a second articulated ball head and a third articulated ball head; a first ball head sleeve sleeved on the first hinged ball head is arranged on the main positioning frame; a second ball head sleeve sleeved on the second hinged ball head is arranged on the second reciprocating driver; a third ball head sleeve sleeved on the third hinged ball head is arranged on the first reciprocating driver; the connecting line of the first hinge ball head and the second hinge ball head and the connecting line of the second hinge ball head and the third hinge ball head are defined to be perpendicular to each other; the connecting line of the second hinged ball head and the third hinged ball head is arranged in parallel with the second rotating seat, so that the radar module can be effectively pushed and pulled.
Preferably, the first reciprocating driver comprises a rotating motor which is fixedly arranged relative to the second rotating base; a transmission connected to the rotating electrical machine; a main drive wheel fixed to an output shaft of the transmission; the first driven wheel is meshed with the main driving wheel, and a first driving half wheel is fixedly arranged on the first driven wheel; a second driven wheel meshed with the main driving wheel, and a second driving half wheel is fixedly arranged on the second driven wheel; and a rack arranged between the first driving half wheel and the second driving half wheel and meshed with the first driving half wheel and the second driving half wheel at different time; wherein, a third ball head sleeve is arranged at one end part of the rack.
Preferably, the vent holes are correspondingly configured right below the antenna unit and comprise a slow air cavity connected with the main board cavity and an air outlet arranged towards the antenna unit; wherein, the junction shaping in gentle wind chamber and mainboard chamber has a wind-guiding chamfer.
Preferably, the bearing plate is provided with a plurality of first air guide grooves which can be communicated with a plurality of air outlets arranged in a row or a column; a plurality of second air guide grooves are symmetrically formed in two sides of the first air guide groove respectively; the second air guide groove is vertical to the first air guide groove; the air outlet is arranged at the intersection of the second air guide groove and the first air guide groove.
Compared with the prior art, the invention has the beneficial effects that: the vehicle-mounted active phased array radar provided by the invention is provided with the rotary scanning driving module and the radar module with the heat dissipation function, and the radar module can perform rotary motion under the action of the rotary scanning driving module and can greatly adjust the pitching angle of the radar module relative to the horizontal plane; the radar module can adjust the pitching angle of the radar module relative to the horizontal plane in a small range under the action of the cyclic scanning driving module, and can periodically perform reciprocating side-swinging action so as to accurately monitor a target object in a small range. By the mode, the detection range of the radar module is enlarged, and the detection efficiency of the radar module is improved.
Furthermore, the invention is not provided with an independent heat dissipation structure, but the bearing plate of the radar module is provided with a cavity structure, the antenna units are uniformly arranged on the surface of the bearing plate, and the ventilation holes mutually communicated with the cavity structure are arranged right opposite to the antenna units, so that the antenna units can be cooled by blowing; because the loading board cavity sets up and does not set up plus heat dissipation mechanism for phased array active radar's structure is simpler, and volume and weight are lighter and more handy.
Drawings
FIG. 1 is an isometric view of the overall structure of the present invention;
FIG. 2 is a side view of the rotary scan driving module according to the present invention in an operating state;
FIG. 3 is a side view of the rotary scan driving module according to another operating state of the present invention;
FIG. 4 is an isometric view of a rotary scan drive module according to the present invention;
FIG. 5 is a cross-sectional view of a rotary scan driving module according to the present invention;
FIG. 6 is an exploded view of the rotary scan driving module according to the present invention;
FIG. 7 is a schematic cross-sectional view of a seal ring configuration of the present invention;
FIG. 8 is an isometric view of a radar module according to the present invention;
FIG. 9 is a schematic structural diagram of a carrier plate and an antenna unit according to the present invention;
FIG. 10 is a cross-sectional view of a radar module according to the present invention;
FIG. 11 is an enlarged view of a portion of the radar module shown in FIG. 10;
FIG. 12 is an isometric view of a cyclic scan drive module according to the present invention;
FIG. 13 is a schematic view of the reciprocating drive of the present invention;
FIG. 14 is a schematic view of the hinge position of the radar module of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1 to 14, the present invention provides a vehicle-mounted active phased array radar, including:
a rotary scanning driving module 2 fixed on the vehicle body 1;
the circulating scanning driving module 3 is fixed on the rotary scanning driving module 2; and
the radar module 4 is connected to the cyclic scanning driving module 3 and used for finding a target object by utilizing electromagnetic waves and measuring the spatial position of the target object;
the rotary scanning driving module 2 can drive the radar module 4 to rotate circumferentially and can adjust the pitch angle of the radar module 4 relative to the horizontal plane; the cyclic scanning driving module 3 can further adjust the pitching angle of the radar module 4 relative to the horizontal plane, and can drive the radar module 4 to perform reciprocating side-swinging action, so that the detection range of the radar module 4 is enlarged, and the detection efficiency of the radar module 4 is improved.
As an embodiment of the present invention, the rotational scanning driving module 2 comprises
The base 21 is fixed on the vehicle body 1 and is provided with a bottom surface parallel to the horizontal plane and a top surface with an included angle with the horizontal plane;
a first rotary base 22 rotatably provided on the base 21 and provided with a bottom surface parallel to the top surface of the base 21 and a top surface parallel to a horizontal plane;
a second rotary base 23 rotatably provided on the first rotary base 22, and disposed in parallel with a top surface of the first rotary base 22;
a first motor 251 for driving the first rotary base 22 to rotate; and
a second motor 252 for driving the second rotary base 23 to rotate;
when the first rotating base 22 rotates relative to the base 21, an included angle between the top surface of the first rotating base 22 and the horizontal plane can be continuously and periodically changed, so that the pitch angle of the radar module 4 relative to the horizontal plane can be adjusted.
Specifically, the base 21 is fixed to the vehicle body 1 by a base bolt 210.
As an embodiment of the present invention, a base mounting cavity 211 for fixing the first motor 251 is formed in the base 21; an output shaft of the first motor 251 is fixed on the first rotary base 22 to drive the first rotary base 22 to rotate.
Further, a rotating base bottom cavity 222 is formed on the first rotating base 22, and an output shaft of the first motor 251 is fixed in the rotating base bottom cavity 222. A first bearing 510 is disposed in the base mounting cavity 211, and is sleeved on the output shaft of the first motor 251 to rotatably support the output shaft of the first motor 251.
As an embodiment of the present invention, the first rotating base 22 further has a rotating base top cavity 221 for fixing the second motor 252; an output shaft of the second motor 252 is fixed to the second rotary base 23 to drive the second rotary base 23 to rotate.
Further, a second bearing 520 is disposed in the top cavity 221 of the rotary base, and is sleeved on the output shaft of the second motor 252 to rotatably support the output shaft of the second motor 252.
As an embodiment of the present invention, a position limiting assembly is disposed between the base 21 and the first rotating base 22 to limit the position of the first rotating base 22 when the base 21 and the first rotating base rotate relatively; the limiting component comprises
An annular guide groove 260 and a first annular receiving groove 272 disposed on a bottom surface of the first rotary base 22;
an annular boss 261 and a second annular receiving groove 271 disposed on the top surface of the base 21; and
a plurality of rolling balls 262;
wherein the annular boss 261 is slidably fitted in the annular guide groove 260; the first annular containing groove 272 and the second annular containing groove 271 have the same size and are arranged oppositely; the plurality of balls 262 are disposed in the first annular receiving groove 272 and the second annular receiving groove 271, so as to reduce the rotational friction between the base 21 and the first rotary base 22, and to define the position between the base 21 and the first rotary base 22.
As an embodiment of the present invention, a first chamfer 281 is formed at an outer edge of the top surface of the base 21, and a second chamfer 282 is formed at an outer edge of the bottom surface of the first rotary seat 22; the first chamfer 281 and the second chamfer 282 together form an annular joint gap;
a sealing ring 24 is installed in the gap of the joint to prevent foreign matters from entering between the base 21 and the first rotary seat 22.
As an embodiment of the invention, the cross section of the sealing collar 24 is substantially triangular; a connecting gap is arranged on the sealing ferrule 24, and ferrule connecting arms 243 are formed on two sides of the connecting gap;
the two ferrule connecting arms 243 are detachably connected to each other by connecting bolts 244.
Specifically, a through hole is configured on one ferrule connecting arm 243, a threaded hole is configured on the other ferrule connecting arm 243, and the connecting bolt 244 can pass through the through hole and be screwed with the threaded hole, so as to realize detachable connection between the two ferrule connecting arms 243.
As an embodiment of the present invention, the sealing ferrule 24 is configured with a ferrule inner cavity 241 and a plurality of flow channels 242 communicated with the ferrule inner cavity 241;
wherein, the inner cavity 241 of the ferrule contains lubricating oil; the flow channel 242 is disposed at the inner ring position of the sealing ring 24 and is opposite to the gap at the joint, so that the lubricating oil can continuously drop into the installation gap between the base 21 and the first rotating base 22 to achieve the lubricating effect.
Further, the sealing collar 24 is arranged to rotate synchronously with the first rotary seat 22; a plurality of convex teeth 245 are arranged on the side top surface 240 of the sealing ring 24 opposite to the second chamfer 282, and a plurality of tooth grooves (not shown in the figure) corresponding to the convex teeth 245 are arranged on the second chamfer 282;
wherein the convex teeth 245 can be inserted into the tooth grooves, so that the sealing ring 24 can rotate synchronously with the first rotary seat 22.
In this way, the lubricating oil can penetrate from the ferrule inner cavity 241 into the mounting gap between the base 21 and the first rotary seat 22 during the rotation of the sealing ferrule 24.
Still further, the limiting component may be installed between the second rotating base 23 and the first rotating base 22, so as to limit the position of the second rotating base 23 when the two rotate relatively, and reduce the rotational friction force between the two. Similarly, the sealing ring 24 may be installed between the second rotating base 23 and the first rotating base 22, so as to prevent foreign matters from entering between the second rotating base 23 and the first rotating base 22, and to lubricate therebetween.
As an embodiment of the present invention, the cyclic scan driving module 3 includes
A main positioning frame 30 fixed on the second rotating base 23, one end of which is universally hinged on the radar module 4; and
the two reciprocating drivers are respectively used for linking the radar module 4 to perform reciprocating pitching motion and reciprocating side swinging motion, and one end part of each reciprocating driver is universally hinged on the radar module 4;
wherein the reciprocating drivers are divided into the same structure
A first reciprocating driver 31 for linking the radar module 4 to perform reciprocating side-swinging motion; and
and a second reciprocating driver 32 for linking the radar module 4 to perform reciprocating pitching motion.
As an embodiment of the present invention, the radar module 4 is configured with a first hinge ball 441, a second hinge ball 442, and a third hinge ball 443;
the main positioning frame 30 is provided with a first ball head sleeve 301 sleeved on the first hinged ball head 441;
a second ball head sleeve 302 sleeved on the second articulated ball head 442 is arranged on the second reciprocating driver 32;
the first reciprocating driver 31 is provided with a third ball joint sleeve 303 sleeved on the third articulated ball joint 443;
wherein a line connecting the first and second articulation bulbs 441, 442 and the third articulation bulb 443 is defined as being perpendicular to each other; the line connecting the second hinge ball 442 and the third hinge ball 443 is parallel to the second rotating base 23, so as to effectively push and pull the radar module 4.
As an embodiment of the present invention, the reciprocating driver comprises
A rotating electric machine 310 fixedly provided to the second rotating base 23;
a transmission 311 connected to the rotating electrical machine 310;
a first driven wheel 611 disposed in meshing engagement with the main driving wheel 60 and having a first driving half wheel 612 fixedly disposed thereon;
a second driven wheel 621 engaged with the main driving wheel 60, and a second driving half wheel 622 fixedly disposed thereon; and
a rack 63 disposed between the first driving half-wheel 612 and the second driving half-wheel 622, and capable of meshing with both but not simultaneously;
the second ball socket cover 302 or the third ball socket cover 303 is disposed at one end of the rack 63.
Specifically, only one of the first driving half-wheel 612 and the second driving half-wheel 622 is engaged with the rack 63, so that the rack 63 can reciprocate.
In a specific application scenario, as can be understood by referring to fig. 13, the first driving half-wheel 612 can drive the rack 63 forward (the first driving half-wheel 612 and the second driving half-wheel 622 both rotate counterclockwise); when the forward movement of the rack 63 is finished, the first driving half-wheel 612 and the rack 63 are about to be disengaged, and the second driving half-wheel 622 is about to be engaged with the rack 63 to drive the rack 63 to move backwards. Similarly, when the rack 63 is moved backward, the second driving half-wheel 622 and the rack 63 are disengaged, and the first driving half-wheel 612 is engaged with the rack 63 to drive the rack 63 to move forward. In this way, the rack 63 can be periodically reciprocated by the interlocking action of the first driving half wheel 612 and the second driving half wheel 622.
As an embodiment of the present invention, a reflective positioning plate 631 is fixed on the rack 63, and an optical sensor 64 is fixed on the top of the second rotating base 23;
when the rack 63 finishes moving forwards or backwards, the reflective positioning plate 631 faces the optical sensor 64, and the optical sensor 64 can receive a reflective signal emitted by itself, so that the position of the reflective positioning plate 631 can be monitored; through twice to the time difference that reflection locating plate 631 monitored can calculate rack 63 reciprocating motion's time cycle to can fix a position in real time the shift position of rack 63, and then can calculate in real time the every single move angle and the sidesway angle of radar module 4.
As an embodiment of the present invention, the radar module 4 includes
A carrier plate 40 having a main plate cavity 400 formed therein; and
a plurality of antenna units 42 fixed on the carrier plate 40 in an array manner;
wherein the main board chamber 400 is in ventilation connection with the fan 43; the carrier plate 40 is provided with a plurality of ventilation holes 41 communicated with the main plate cavity 400 to guide wind toward the antenna unit 42, so as to dissipate heat generated by the antenna unit 42.
In an embodiment of the present invention, the ventilation holes 41 are correspondingly disposed right below the antenna unit 42, and include a wind damping chamber 412 connected to the main board chamber 400 and a wind outlet 411 disposed toward the antenna unit 42;
wherein, a wind guiding chamfer 413 is formed at the connection position of the wind retarding cavity 412 and the main board cavity 400.
As an embodiment of the present invention, the bearing plate 40 is provided with a plurality of first wind guiding grooves 401 capable of guiding a plurality of wind outlets 411 arranged in a row or a column;
a plurality of second air guide grooves 402 are symmetrically formed in two sides of the first air guide groove 401;
the second air guiding groove 402 is perpendicular to the first air guiding groove 401; the air outlet 411 is disposed at an intersection of the second air guiding groove 402 and the first air guiding groove 401.
Further, the second air guiding grooves 402 disposed on the first air guiding grooves 401 at intervals are not communicated with each other.
As an embodiment of the present invention, the bottom of the antenna unit 42 is provided with a plurality of fixing blocks 421, and the antenna unit 42 is mounted on the supporting plate 40 through the fixing blocks 421.
The antenna unit is arranged on the bearing plate, and the ventilation holes communicated with the cavity structure are opposite to the antenna unit, so that the antenna unit can be cooled by blowing; because the loading board cavity sets up and does not set up plus heat dissipation mechanism for phased array active radar's structure is simpler, and volume and weight are lighter and more handy.
In summary, the radar module can perform a rotation motion under the action of the rotation scanning driving module 2, and can greatly adjust the pitch angle of the radar module relative to the horizontal plane; the radar module can adjust the pitching angle of the radar module relative to the horizontal plane in a small range under the action of the cyclic scanning driving module 3, and can periodically perform reciprocating side-swinging actions so as to accurately monitor a target object in a small range. In this way, the detection range of the radar module 4 is enlarged, and the detection efficiency of the radar module 4 is improved.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. An on-vehicle active phased array radar, comprising:
a rotary scanning driving module (2) fixed on the vehicle body (1);
a circulating scanning driving module (3) fixed on the rotary scanning driving module (2); and
the radar module (4) is connected to the cyclic scanning driving module (3) and is used for finding a target object by utilizing electromagnetic waves and measuring the spatial position of the target object;
the rotary scanning driving module (2) can drive the radar module (4) to rotate circumferentially and can adjust the pitch angle of the radar module (4) relative to the horizontal plane; the cyclic scanning driving module (3) can further adjust the pitching angle of the radar module (4) relative to the horizontal plane and can drive the radar module (4) to perform reciprocating side-swinging action so as to increase the detection range of the radar module (4) and improve the detection efficiency of the radar module (4);
the radar module (4) comprises
A carrier plate (40) having a main plate cavity (400) formed therein; and
a plurality of antenna units (42) fixed on the bearing plate (40) in an array manner;
wherein the main board cavity (400) is in ventilation connection with a fan (43); the bearing plate (40) is provided with a plurality of ventilation holes (41) communicated with the main plate cavity (400) so as to guide wind to the antenna unit (42), thereby dissipating heat generated by the antenna unit (42).
2. Vehicle mounted active phased array radar according to claim 1, characterized in that the rotary scanning drive module (2) comprises
The base (21) is fixed on the vehicle body (1) and is provided with a bottom surface parallel to the horizontal plane and a top surface with an included angle with the horizontal plane;
a first rotary base (22) rotatably provided on the base (21) and provided with a bottom surface parallel to the top surface of the base (21) and a top surface parallel to a horizontal plane;
a second rotary base (23) rotatably provided on the first rotary base (22) and disposed in parallel with a top surface of the first rotary base (22);
a first motor (251) for driving the first rotary base (22) to rotate; and
a second motor (252) for driving the second rotary base (23) to rotate;
when the first rotating base (22) rotates relative to the base (21), an included angle between the top surface of the first rotating base (22) and the horizontal plane can be continuously and periodically changed, so that the pitching angle of the radar module (4) relative to the horizontal plane can be adjusted.
3. The on-vehicle active phased array radar according to claim 2, wherein a position limiting component is arranged between the base (21) and the first rotating base (22) so as to limit the position of the first rotating base (22) when the base and the first rotating base rotate relatively; the limiting component comprises
An annular guide groove (260) and a first annular receiving groove (272) which are arranged on the bottom surface of the first rotary seat (22);
an annular boss (261) and a second annular receiving groove (271) disposed on the top surface of the base (21); and
a plurality of rolling balls (262);
wherein the annular boss (261) is slidably embedded in the annular guide groove (260); the first annular containing groove (272) and the second annular containing groove (271) are equal in size and are arranged oppositely; the rolling balls (262) are arranged in the first annular containing groove (272) and the second annular containing groove (271) so as to reduce the rotating friction force between the base (21) and the first rotating base (22) and limit the position between the base (21) and the first rotating base (22).
4. The on-vehicle active phased array radar according to claim 2, wherein a first chamfer (281) is formed at an outer edge of the top surface of the base (21), and a second chamfer (282) is formed at an outer edge of the bottom surface of the first rotary base (22); the first chamfer (281) and the second chamfer (282) jointly form an annular joint gap;
a sealing ring (24) is arranged in the gap of the joint to prevent foreign matters from entering between the base (21) and the first rotating seat (22);
the sealing collar (24) is substantially triangular in cross-section; a connecting gap is arranged on the sealing ferrule (24), and ferrule connecting arms (243) are formed on two sides of the connecting gap;
wherein the two ferrule connecting arms (243) are detachably connected with each other through a connecting bolt (244).
5. The vehicular active phased array radar according to claim 4, wherein the sealing ferrule (24) is provided with a ferrule inner cavity (241) and a plurality of flow channels (242) communicated with the ferrule inner cavity (241);
wherein, lubricating oil is contained in the inner cavity (241) of the ferrule; the flow channel (242) is arranged at the inner ring position of the sealing ferrule (24) and is opposite to the gap of the joint, so that the lubricating oil can be continuously dripped into the mounting gap between the base (21) and the first rotating seat (22) to achieve the lubricating effect; the sealing collar (24) is arranged to rotate synchronously with the first rotary seat (22).
6. Vehicle-mounted active phased array radar according to claim 2, characterized in that the cyclic scan drive module (3) comprises
The main positioning frame (30) is fixed on the second rotating seat (23), and one end part of the main positioning frame is universally hinged on the radar module (4);
a first reciprocating driver (31) for linking the radar module (4) to perform reciprocating side swinging action; and
a second reciprocating driver (32) for linking the radar module (4) to perform reciprocating pitching motion;
the first reciprocating driver (31) and the second reciprocating driver (32) are identical in structure and are both universally hinged on the radar module (4).
7. Vehicle mounted active phased array radar according to claim 6, characterized in that the radar module (4) is provided with a first articulation bulb (441), a second articulation bulb (442) and a third articulation bulb (443);
a first ball head sleeve (301) sleeved on the first hinged ball head (441) is arranged on the main positioning frame (30);
a second ball head sleeve (302) sleeved on the second hinged ball head (442) is arranged on the second reciprocating driver (32);
a third ball head sleeve (303) sleeved on the third hinged ball head (443) is arranged on the first reciprocating driver (31);
wherein a line connecting the first articulation bulb (441) and the second articulation bulb (442), a line connecting the second articulation bulb (442) and the third articulation bulb (443) are defined as being perpendicular to each other; the connecting line of the second articulation bulb (442) and the third articulation bulb (443) is arranged parallel to the second swivel (23).
8. The on-board active phased array radar as claimed in claim 7, wherein said first reciprocating driver (31) comprises
A rotating motor (310) fixedly arranged relative to the second rotating base (23);
a transmission (311) connected to the rotating electrical machine (310);
a main drive wheel (60) fixed to an output shaft of the transmission (311);
a first driven wheel (611) meshed with the main driving wheel (60), and a first driving half wheel (612) is fixedly arranged on the first driven wheel;
a second driven wheel (621) meshed with the main driving wheel (60), and a second driving half wheel (622) is fixedly arranged on the second driven wheel; and
a rack (63) disposed between the first driving half-wheel (612) and the second driving half-wheel (622) and capable of meshing with both but not simultaneously;
wherein the third ball joint sleeve (303) is disposed at one end of the rack (63).
9. The active phased array radar for vehicle mounting according to claim 1, wherein the ventilation holes (41) are disposed directly below the antenna unit (42) and include a wind damping chamber (412) connected to the main board chamber (400) and a wind outlet (411) provided toward the antenna unit (42);
and a wind guide chamfer (413) is formed at the joint of the wind buffering cavity (412) and the main board cavity (400).
10. The vehicle-mounted active phased array radar as claimed in claim 9, wherein the carrier plate (40) is provided with a plurality of first air guide grooves (401) capable of conducting a plurality of air outlets (411) arranged in a row or a column;
a plurality of second air guide grooves (402) are symmetrically formed in two sides of the first air guide groove (401);
the second air guide groove (402) is perpendicular to the first air guide groove (401); the air outlet (411) is arranged at the intersection of the second air guiding groove (402) and the first air guiding groove (401).
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| CN111913151B (en) | 2023-08-15 |
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