CN216285687U

CN216285687U - Radar and movable platform

Info

Publication number: CN216285687U
Application number: CN202121759503.9U
Authority: CN
Inventors: 潘仑; 王春明; 王博
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-04-12
Anticipated expiration: 2031-07-29

Abstract

The embodiment of the application provides a radar and a movable platform. Wherein, the radar includes: the motor comprises a stator and a rotor which is rotatably connected with the stator; the antenna assembly is arranged on the rotor so as to be driven by the rotor to rotate; the first rotor side polar plate is electrically connected with the antenna assembly and arranged on the rotor so as to be driven by the rotor to rotate; the first stator side polar plate is electrically connected with the data processing module and arranged on the stator; the first stator side polar plate and the first rotor side polar plate are opposite and arranged at intervals to form a first capacitor structure for transmitting data acquired by the antenna assembly to the data processing module; and the first stator side polar plate and the first rotor side polar plate are kept in a state of being opposite and spaced in the process that the rotor rotates relative to the stator. The technical scheme provided by the embodiment of the application can enlarge the frequency range of the signals which can be transmitted and reduce the fluctuation of transmission delay.

Description

Radar and movable platform

Technical Field

The embodiment of the application relates to the technical field of radars, in particular to a radar and a movable platform.

Background

In the detection and ranging application fields of unmanned aerial vehicles, automobiles and other industries, the radar is widely applied due to the advantages of high detection precision, long detection distance, high environment tolerance and the like.

Generally, a radar includes a stator portion and a rotating portion. Wherein, there is not electrical contact between rotating part and the stator part, needs to communicate through wireless. Currently, the wireless communication technology applied in radar is mainly WiFi.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a radar and a movable platform, which can enlarge the frequency range of signals capable of being transmitted between a stator side and a rotor side and reduce the fluctuation of transmission delay between the stator side and the rotor side.

An embodiment of the present application provides a radar, including:

the motor comprises a stator and a rotor which is rotatably connected with the stator;

the antenna assembly is arranged on the rotor so as to be driven by the rotor to rotate;

a first rotor-side plate electrically connected to the antenna assembly and provided on the rotor to be rotated by the rotor;

the first stator side polar plate is electrically connected with the data processing module and arranged on the stator;

the first stator side polar plate and the first rotor side polar plate are opposite and arranged at intervals so as to form a first capacitor structure for transmitting the data acquired by the antenna assembly to the data processing module; and the first stator side pole plate and the first rotor side pole plate are kept in a state of being opposite to each other and arranged at intervals in the process that the rotor rotates relative to the stator.

Another embodiment of the present application provides a movable platform comprising the radar mentioned above.

In the radar provided by the embodiment of the application, a first rotor side polar plate is arranged on a rotor side, and the first rotor side polar plate is connected with an antenna assembly on the rotor side; and a first stator side polar plate is arranged on the stator side and is electrically connected with the data processing module on the stator side. During the process that the rotor side rotates relative to the stator side, the first rotor side polar plate and the first stator side polar plate are kept in a state of being opposite and spaced, so that a first capacitor structure for transmitting data collected by the antenna assembly to the data processing module is formed. In the radar provided by the embodiment of the application, the signal transmission between the stator side and the rotor side of the radar is realized by utilizing the electric field coupling principle of the capacitor, and the frequency range of the transmitted signal is enlarged. Moreover, the signal transmission is carried out by adopting a capacitive electric field coupling principle, the encoding and decoding operation on the signal is not needed, and the signal transmission delay is fixed as long as the capacitive polar plate, the wiring and the like are fixed, so that the fluctuation of the transmission delay is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a first cross-sectional view of a radar provided in accordance with an embodiment of the present application;

fig. 2 is a schematic diagram of a capacitor according to an embodiment of the present disclosure;

FIG. 3 is a first cross-sectional view of a first portion of the components of a radar provided in accordance with an embodiment of the present application;

FIG. 4 is a second cross-sectional view of a first portion of the components of the radar provided in accordance with an embodiment of the present application;

fig. 5 is a schematic structural diagram of a first part of components of a radar according to an embodiment of the present application;

FIG. 6 is a cross-sectional view of a first sub-assembly provided in accordance with an embodiment of the present application;

FIG. 7 is a cross-sectional view of a second subassembly of the first subassembly as provided by an embodiment of the present application;

FIG. 8 is a first exploded view of a first portion of the components of a radar provided in accordance with an embodiment of the present application;

FIG. 9 is a second exploded view of a first portion of the components of the radar provided in accordance with an embodiment of the present application;

fig. 10 is a second cross-sectional view of a radar according to an embodiment of the present application.

Detailed Description

Currently, the commonly used wireless Communication modes mainly include Bluetooth (Bluetooth), ZigBee (ZigBee), WiFi, infrared Data association (irda), Ultra Wide Band (UWB), and Near Field Communication (NFC). In the existing wireless communication modes, the original analog signals are required to be coded and decoded in the communication process, so that the problems of unfixed transmission delay, narrow frequency range of the transmitted signals and the like are caused. The final calculated obstacle distance is not accurate enough due to the fact that the transmission delay is not fixed, because the obstacle distance is calculated according to the difference between the absolute value of the difference between the transmission time point of the antenna assembly and the receiving time point of the signal received by the stator end and the transmission delay.

In order to solve or partially solve the above technical problem, an embodiment of the present application provides a wireless communication method applied to a radar, that is, signal transmission between a stator side and a rotor side of the radar is realized according to an electric field coupling principle of a capacitor, so that not only a frequency range of a signal that can be transmitted can be increased, but also a fluctuation of transmission delay can be reduced.

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

Furthermore, the term "coupled" is intended to include any direct or indirect coupling. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices.

It should be understood that the term "and/or" is used herein only to describe an association relationship of associated objects, and means that there may be three relationships, for example, a1 and/or B1, which may mean: a1 exists alone, A1 and B1 exist simultaneously, and B1 exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. Various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Fig. 1 shows a first cross-sectional view of a radar provided by an embodiment of the present application. Fig. 3 is a first cross-sectional view of a first portion of the components of a radar according to an embodiment of the present application. Fig. 5 is a schematic structural diagram of a first part of components of a radar according to an embodiment of the present disclosure. FIG. 6 is a cross-sectional view of a first sub-assembly provided in accordance with an embodiment of the present application; fig. 7 is a cross-sectional view of a second subassembly of the first subassembly according to an embodiment of the present application. FIG. 8 is a first exploded view of a first portion of the components of a radar provided in accordance with an embodiment of the present application; fig. 9 is a second exploded view of a first portion of the components of a radar according to an embodiment of the present application. As shown in fig. 1, 3, 5, 6, 7, 8, and 9, the radar includes: the motor comprises a stator and a rotor which is rotatably connected with the stator; an antenna assembly (not labeled) disposed on the rotor (not labeled) for rotation by the rotor (not labeled); a first rotor side plate 11 electrically connected to the antenna assembly and provided on the rotor so as to be rotated by the rotor with the first rotor side plate 11; a first stator side plate 21 electrically connected to a data processing module (not labeled) and disposed on the stator; the first stator side plate 21 is opposite to the first rotor side plate 11 and is arranged at an interval to form a first capacitor structure for transmitting the data acquired by the antenna assembly to the data processing module; and the first stator-side pole plate 21 and the first rotor-side pole plate 11 are maintained in a state of being opposed to each other and spaced apart from each other while the rotor is rotated relative to the stator.

Wherein the stator and the rotor may be coupled together by a bearing.

During the rotation of the rotor relative to the stator, the first rotor-side pole plate 11 also rotates with the rotation of the rotor. The process of rotating the rotor relative to the stator, i.e. the process of rotating the first rotor side plate 11 relative to the first stator side plate 21. In this process, the first rotor-side plate 11 and the first stator-side plate 21 are kept in a state of being opposite and spaced from each other, which indicates that a capacitor structure is always kept between the two, so that continuous communication between the rotor side and the stator side can be ensured in the rotating process. The antenna assembly transmits the acquired barrier information to the data processing module through the first capacitor structure.

In the technical scheme provided by the embodiment of the application, the principle of the capacitor is utilized, namely, the electric field coupling principle between the polar plates is utilized to realize the transmission of the alternating signal. Fig. 2 shows a signal coupling schematic diagram provided by an embodiment of the present application. The first polar plate 1 and the second polar plate 2 form a plate capacitor, the impedance of the plate capacitor to the alternating current signal is 1/j omega C, and C is the capacitance value of the plate capacitor. In fig. 2, R is a sampling resistor, and divides the alternating signal together with the capacitive impedance 1/j ω C. According to the coupling principle, the communication device has strong adaptability to the dynamic range of signals and has small limitation on the frequency range of the signals. In addition, as can be seen from theoretical analysis, the higher the signal frequency, the smaller the capacitance impedance, and the better the signal coupling performance of the device. In addition, in the transmission process, the original signal (namely, the analog signal AC) does not need to be digitally processed, the transmitted signal does not need to be digitally encoded, carrier modulation is not needed, and the original signal AC only needs to be transmitted to the first amplifier 3 for amplification, then directly transmitted to the second amplifier 4 through the parallel plate capacitor, and then transmitted to the digital-to-analog converter 6 after being amplified by the second amplifier 4. In the present embodiment, the first rotor-side plate 11 corresponds to the first plate 1 in fig. 2; the first stator-side plate 21 corresponds to the second plate 2 in fig. 2.

In the technical scheme provided by the embodiment of the application, the signal transmission can be realized by utilizing the capacitive electric field coupling principle without carrying out coding and decoding operations on signals, and when a polar plate and a wiring are fixed, the signal transmission delay is also fixed. In addition, the technical scheme provided by the embodiment of the application does not need signal coding and decoding operation and carrier modulation, and is only based on capacitance coupling, so that a larger dynamic transmission range of signal frequency can be provided.

In the prior art, a series of data processing modules such as an analog-digital converter, a digital encoder, a carrier modulator and the like need to be arranged on the rotor side of the radar, so that the radar has higher cost. In the embodiment of the application, the data processing module is designed on the stator side, so that the possibility of multiplexing the data processing module inside the movable platform (such as an unmanned aerial vehicle) is provided. In this way, the cost of the entire radar can be reduced.

In practical application, the first rotor side polar plate 11 and the first stator side polar plate 21 are both in an annular structure; the peripheral edge region of the first rotor side plate 11 is fixedly arranged on the rotor; the inner peripheral edge region of the first stator-side plate 21 is fixedly disposed on the stator. Wherein, the annular structure can be a circular ring structure.

The first rotor side plate 11 includes a first inner circumferential surface, a first outer circumferential surface, and a first end surface connecting the first inner circumferential surface and the first outer circumferential surface; the first stator side plate 21 includes a second inner circumferential surface, a second outer circumferential surface, and a second end surface connecting the second inner circumferential surface and the second outer circumferential surface.

In one example, a first outer peripheral surface of the first rotor-side pole plate 11 is fixedly provided on the rotor; the second inner peripheral surface of the first stator-side pole plate 21 is fixedly arranged on the stator; the first inner peripheral surface of the first rotor-side plate 11 and the second outer peripheral surface of the first stator-side plate 21 are disposed opposite to each other at an interval (not shown) to form the first capacitor structure.

In another example, as shown in fig. 3, the first end surface is opposite to and spaced apart from the second end surface.

It is necessary to supplement that, by adopting the way that the first end face and the second end face are opposite and arranged at intervals to form the first capacitor, the number of the stator side pole plates and/or the rotor side pole plates can be conveniently expanded, the shapes and the sizes of all the stator side pole plates can be the same, the shapes and the sizes of all the rotor side pole plates can be the same, the batch production is convenient, and the production cost can be reduced. If the first inner circumferential surface of the first rotor-side electrode plate 11 is opposite to the second outer circumferential surface of the first stator-side electrode plate 21 and is disposed at an interval to form the first capacitor, that is, the stator-side electrode plate or the rotor-side electrode plate is sleeved, the diameter of the stator-side electrode plate or the rotor-side electrode plate to be expanded is different from the diameters of the first rotor-side electrode plate 11 and the first stator-side electrode plate 21, and the sleeved structure can be formed. The difference in size will undoubtedly increase the production cost.

In order to reduce the interference to the signal transmission, it is necessary to ensure that the impedance change of the first capacitor is small. The impedance of the first capacitor is related to the capacitance value, and the capacitance value is related to the relative area and the distance between the polar plates. In order to reduce the variation of the relative area of the first stator side plate 21 between the first rotor side plates 11 during the rotation process, the first stator side plate 21 and the first rotor side plate 11 may be configured as a circular ring structure, and the two are coaxially arranged (i.e., a first axis perpendicular to the circle center of the first stator side plate 21 and the ring surface of the first stator side plate 21 coincides with a second axis perpendicular to the circle center of the first rotor side plate 11 and the ring surface of the first rotor side plate 11). Thus, variations in the relative area between the plates and variations in the spacing during rotation are reduced or avoided.

In one example, as shown in fig. 3 and 6, the radar may further include: a second rotor side plate 12. The second rotor side polar plate 12 is electrically connected with the antenna assembly and arranged on the rotor so as to be driven by the rotor to rotate the second rotor side polar plate 12; the first stator side plate 21 is located between the first rotor side plate 11 and the second rotor side plate 12; the second rotor side polar plate 12 is opposite to the first stator side polar plate 21 and is arranged at an interval, so as to form a second capacitor structure for transmitting the data acquired by the antenna assembly to the data processing module; and the second rotor side pole plate 12 and the first stator side pole plate 21 are maintained in a state of being opposed to each other and spaced apart from each other while the rotor is rotated relative to the stator.

Wherein the second rotor side plate 12 may be an annular structure. The outer peripheral edge region of the second rotor side plate 12 is fixedly arranged on the rotor. In one embodiment, the second rotor side plate 12 may include a third inner circumferential surface, a third outer circumferential surface and a third end surface connecting the third inner circumferential surface and the third outer circumferential surface, the third end surface being opposite to and spaced apart from the opposite end surface of the first stator side plate 21 opposite to the second end surface thereof.

In order to reduce interference to signal transmission, the second rotor side plate 12 is a circular ring structure, and the second rotor side plate 12, the first rotor side plate 11, and the first stator side plate 21 are coaxially disposed (i.e., a first axis of a circle center of the first stator side plate 21 and perpendicular to a ring surface of the first stator side plate 21, a second axis of a circle center of the first rotor side plate 11 and perpendicular to a ring surface of the first rotor side plate 11, and a third axis of a circle center of the second rotor side plate 12 and perpendicular to a ring surface of the second rotor side plate 12 coincide).

Mechanical errors cannot be avoided in the production and subsequent installation processes of each component of the radar. Due to the existence of mechanical errors, in the process that the rotor rotates relative to the stator, the distance between two adjacent polar plates and the relative area can not be guaranteed to be kept unchanged, and the capacitance impedance can not be guaranteed to be unchanged. In order to reduce the negative effect of mechanical error, the impedance of the capacitor can be reduced. In the above embodiment, a second capacitor structure connected in parallel with the first capacitor structure is introduced through the second rotor side plate, and the total capacitance impedance in the circuit can be reduced through the parallel connection, so that the negative effect caused by mechanical error can be reduced.

In a specific structure, as shown in fig. 3 and 9, the radar may further include: the rotor-side carrier 31; an accommodating space is formed inside the rotor-side bearing member 31, and two ends of the accommodating space are open; a first opening end of the rotor-side carrier 31 is fixedly provided on the rotor; the first rotor side pole plate 11 and the second rotor side pole plate 12 are accommodated in the accommodating space, and the peripheral edge region of the first rotor side pole plate 11 and the peripheral edge region of the second rotor side pole plate 12 are both fixedly arranged on the rotor side bearing member 31; the first stator side polar plate 21 is accommodated in the accommodating space and is located between the first rotor side polar plate 11 and the second rotor side polar plate 12.

In an achievable solution, the inner surface of the above-mentioned rotor-side carrier 31 is provided with an internal thread; the outer peripheral surfaces of the first rotor side pole plate 11 and the second rotor side pole plate 12 are provided with external threads used in cooperation with the internal threads. The first rotor side pole plate 11 and the second rotor side pole plate 12 are respectively fixedly connected to the rotor side carrier 31 by a screw thread.

In another implementation, the method further comprises: a first spacer ring 32 and a first pressing member 33; a first bearing table 311 is arranged on the inner side surface of the rotor-side bearing member 31; the outer peripheral edge region of the first rotor-side plate 11 is carried on the first carrying stage 311; the first spacer ring 32 is carried on the peripheral edge region of the first rotor side plate 11; the outer peripheral edge region of the second rotor side plate 12 is carried on the first spacer ring 32; the first pressing member 33 is fixedly disposed on the rotor-side carrier 31, so as to press the first rotor-side pole plate 11, the first spacer ring 32, and the second rotor-side pole plate 12 against the first bearing table 311.

The first spacer ring 32 is used to define the size of the gap between the first rotor side plate 11 and the second rotor side plate 12.

The first pressing part 33 can be fixedly connected to the rotor-side carrier 31 by screws.

As shown in fig. 4 and 9, the radar may further include two rotating support members 61, and the antenna assembly may be disposed on the two rotating support members 61. The rotary support 61 may be fixedly connected to the rotor-side carrier 31 by screws.

Optionally, as shown in fig. 3 and 7, the radar may further include: the second stator-side pole plate 22; a second stator side plate 22 electrically connected to the data processing module and disposed on the stator; the first rotor side plate 11 is located between the first stator side plate 21 and the second stator side plate 22; the second stator side polar plate 22 is opposite to the first rotor side polar plate 11 and is arranged at an interval so as to form a third capacitor structure for transmitting the data acquired by the antenna assembly to the data processing module; and the second stator-side pole plate 22 is maintained in a state of being opposed to and spaced from the first rotor-side pole plate 11 in the process of rotating the rotor relative to the stator.

Wherein the second stator side plate 22 may be a ring structure. The inner peripheral edge region of the second stator-side pole plate 22 is fixedly arranged on the stator. In a specific example, the second stator side plate 22 may include a fourth inner circumferential surface, a fourth outer circumferential surface, and a fourth end surface connecting the fourth inner circumferential surface and the fourth outer circumferential surface, the fourth end surface being opposite to and spaced apart from an opposite end surface of the first rotor side plate 11 opposite to the first end surface thereof.

In order to reduce interference to signal transmission, the second stator side plate 22 is a circular ring structure, and the second stator side plate 22, the first rotor side plate 11, and the first stator side plate 21 are coaxially disposed (i.e., a first axis perpendicular to the ring surface of the first stator side plate 21 and a circle center of the first stator side plate 21, a second axis perpendicular to the ring surface of the first rotor side plate 11 and a circle center of the first stator side plate 11 and a fourth axis perpendicular to the ring surface of the second stator side plate 22 and a circle center of the second stator side plate 22 coincide with each other).

The third capacitor structure and the first capacitor structure form a parallel structure, so that the total capacitance impedance in the circuit can be reduced.

In a specific example, as shown in fig. 1 and 3, the radar may further include: the stator-side carrier 41; the stator-side carrier 41 is fixedly provided on the stator; both the inner peripheral edge region of the first stator-side pole plate 21 and the inner peripheral edge region of the second stator-side pole plate 22 are fixedly provided on the stator-side carrier 41.

In an implementable solution, the outer surface of the stator-side carrier 41 is provided with an external thread, and the inner circumferential surfaces of the first stator-side pole plate 21 and the second stator-side pole plate 22 are provided with an internal thread. The first stator-side pole plate 21 and the second stator-side pole plate 22 are each fixedly connected to the stator-side carrier 41 by a screw thread.

In another implementation, as shown in fig. 3, the radar may further include: a second spacer ring 42 and a second pressing member 43; a second bearing table 411 is provided on the outer side surface of the stator-side carrier 41. The second stator side polar plate 22, the second spacer ring 42 and the first stator side polar plate 21 are sequentially sleeved on the stator side bearing piece 41; the inner peripheral edge region of the second stator-side plate 22 is borne on the second bearing table 411; the second spacer ring 42 is carried on an inner peripheral edge region of the second stator side plate 22; the inner peripheral edge region of the first stator side plate 21 is carried on the second spacer ring 42; the second pressing member 43 is fixedly disposed on the stator-side carrier 41, and is used for pressing the first stator-side pole plate 21, the second spacer ring 42, and the second stator-side pole plate 22 on the second carrier 411.

The second spacer ring 42 is used to define the size of the gap between the first stator-side plate 21 and the second stator-side plate 22.

As shown in fig. 3 and 9, the second pressing member 43 includes a pressing nut; an external thread used in cooperation with the compression nut is provided on the outer side surface of the stator-side carrier 41. The compression nut is fixedly connected to the stator-side carrier 41 by a screw thread.

In practical applications, as shown in fig. 3, 6 and 7, the radar may include more than two rotor side plates and more than two stator side plates, and the more than two rotor side plates and the more than two stator side plates are arranged in an interlaced manner. The two or more rotor side plates include the first rotor side plate and the second rotor side plate. The two or more stator side pole plates include the first stator side pole plate and the second stator side pole plate.

In another example, as shown in fig. 1 and 10, the radar may further include: a first rotor side coil 51 electrically connected to the antenna assembly and provided on the rotor to be rotated by the rotor with the first rotor side coil 51; a first stator side coil 52 electrically connected to the data processing module and provided on the stator; the first stator side coil 52 is opposite to the first rotor side coil 51 and is arranged at an interval, so as to form a first transformer for transmitting a message, which is required to be sent to the data processing module, of the antenna assembly to the data processing module; and the first stator side coil 52 and the first rotor side coil 51 are maintained in a state of being opposed to each other and spaced apart from each other while the rotor is rotated relative to the stator.

In practical applications, the antenna assembly may transmit a receiving time point of a stator-side pole plate receiving signal to the data processing module through the first transformer formed by the first stator-side coil 52 and the first rotor-side coil 51. Therefore, the data processing module can determine the sampling time point according to the receiving time point, so that noise is prevented from being collected or the tail part of a transmission signal is prevented from being collected.

The first transformer formed by the first stator-side coil 52 and the first rotor-side coil 51 can be used for charging the antenna assembly in addition to transmitting signals. The specific implementation process of charging can be referred to in the prior art, and is not described herein in detail.

In another aspect, the present application provides a movable platform including the radar provided in the above embodiments. The specific structure of the radar can refer to the corresponding content in the above embodiments, and is not described herein again. Wherein the movable platform may comprise an unmanned automobile, an unmanned aerial vehicle, or the like.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A radar, comprising:

2. The radar of claim 1 wherein the first rotor side plate and the first stator side plate are both annular structures;

the peripheral edge region of the first rotor side polar plate is fixedly arranged on the rotor;

the inner peripheral edge region of the first stator side plate is fixedly disposed on the stator.

3. The radar according to claim 2, wherein the first rotor-side plate includes a first inner peripheral surface, a first outer peripheral surface, and a first end surface connecting the first inner peripheral surface and the first outer peripheral surface;

the first stator side polar plate comprises a second inner circumferential surface, a second outer circumferential surface and a second end surface connecting the second inner circumferential surface and the second outer circumferential surface;

the first end face and the second end face are opposite and arranged at intervals.

4. The radar of claim 3, further comprising: a second rotor side plate;

the second rotor side polar plate is electrically connected with the antenna assembly and arranged on the rotor so as to be driven by the rotor to rotate;

the first stator side plate is positioned between the first rotor side plate and the second rotor side plate;

the second rotor side polar plate and the first stator side polar plate are opposite and arranged at intervals to form a second capacitor structure for transmitting the data acquired by the antenna assembly to the data processing module; and the second rotor side polar plate and the first stator side polar plate are kept in a state of being opposite to each other and arranged at intervals in the process that the rotor rotates relative to the stator.

5. Radar according to claim 4, characterised in that the rotor-side carrier;

an accommodating space is formed in the rotor side bearing piece, and two ends of the rotor side bearing piece are opened;

the first opening end of the rotor side bearing piece is fixedly arranged on the rotor;

the first rotor side pole plate and the second rotor side pole plate are accommodated in the accommodating space, and the peripheral edge area of the first rotor side pole plate and the peripheral edge area of the second rotor side pole plate are fixedly arranged on the rotor side bearing piece;

the first stator side polar plate is accommodated in the accommodating space and is positioned between the first rotor side polar plate and the second rotor side polar plate.

6. The radar of claim 5, further comprising: the first spacing ring and the first pressing piece;

a first bearing table is arranged on the inner side surface of the rotor side bearing piece;

the peripheral edge region of the first rotor side polar plate is borne on the first bearing table;

the first spacer ring is carried on the peripheral edge region of the first rotor side plate;

the peripheral edge region of the second rotor side plate is carried on the first spacer ring;

the first pressing piece is fixedly arranged on the rotor side bearing piece and used for pressing the first rotor side pole plate, the first spacing ring and the second rotor side pole plate on the first bearing table.

7. Radar according to any one of claims 3 to 6, characterised by further comprising: a second stator side plate;

the second stator side polar plate is electrically connected with the data processing module and arranged on the stator;

the first stator side pole plate is positioned between the first stator side pole plate and the second stator side pole plate;

the second stator side polar plate is opposite to the first rotor side polar plate and is arranged at intervals so as to form a third capacitor structure for transmitting the data acquired by the antenna assembly to the data processing module; and the second stator side pole plate and the first rotor side pole plate are kept in a state of being opposite to each other and arranged at intervals in the process that the rotor rotates relative to the stator.

8. Radar according to claim 7, characterised in that the stator-side carrier;

the stator-side bearing piece is fixedly arranged on the stator;

an inner peripheral edge region of the first stator side plate and an inner peripheral edge region of the second stator side plate are both fixedly disposed on the rotor side carrier.

9. The radar of claim 8, further comprising: a second spacer ring and a second compression member;

a second bearing table is arranged on the outer side surface of the stator side bearing piece;

the second stator side polar plate, the second spacing ring and the first stator side polar plate are sequentially sleeved on the stator side bearing piece;

the inner peripheral edge region of the second stator side plate is borne on the second bearing table;

the second spacer ring is carried on an inner peripheral edge region of the second stator side plate;

the inner peripheral edge region of the first stator side plate is carried on the second spacer ring;

the second pressing piece is fixedly arranged on the stator side bearing piece and used for pressing the first stator side polar plate, the second spacing ring and the second stator side polar plate on the second bearing table.

10. The radar of claim 9, wherein the second compression member comprises a compression nut;

and the outer side surface of the stator side bearing piece is provided with an external thread matched with the compression nut for use.

11. Radar according to any one of claims 1 to 6, characterised by further comprising:

a first rotor-side coil electrically connected to the antenna assembly and provided on the rotor to be rotated by the rotor;

the first stator side coil is electrically connected with the data processing module and arranged on the stator;

the first stator side coil and the first rotor side coil are opposite and arranged at intervals so as to form a first transformer for transmitting a message which needs to be sent to the data processing module by the antenna assembly to the data processing module; and the first stator side coil and the first rotor side coil are maintained in a state of being opposed to each other and spaced apart from each other in a process in which the rotor rotates relative to the stator.

12. A movable platform comprising a radar as claimed in any one of claims 1 to 11.