Communication link system, antenna and communication control method

Abstract

The application belongs to the technical field of communication, and discloses a communication link system, an antenna and a communication control method. The system comprises a ground terminal communication unit, a ground terminal antenna, a flying car terminal communication unit and a flying car terminal antenna, wherein the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna; the flying car terminal communication unit sends communication link data of the flying car to the ground terminal communication unit through the flying car terminal antenna; the ground terminal communication unit receives the communication link data of the flying car through the ground terminal omnidirectional antenna, and switches to the ground terminal high-gain array antenna to communicate with the flying car terminal communication unit through the ground terminal high-gain array antenna when it is detected that the current communication scenario meets preset conditions. The application establishes a short-range and long-range communication link between the ground terminal and the flying car, adopts the ground terminal high-gain array antenna, realizes reliable long-distance communication, and provides a reliable communication platform for flight safety and measurement and control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a communication link system, an antenna and a communication control method. BACKGROUND

[0002] At present, the communication system of most civilian unmanned aerial vehicles is not perfect, and the safety is low, and remote and over-the-horizon communication cannot be realized. The flying car can travel on land and also can fly in the air. For the manned flying car, safety is very important, so it is necessary to build a safe enough communication link system to ensure that the remote flying car can maintain reliable communication connection.

[0003] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The main purpose of the present application is to provide a communication link system, an antenna and a communication control method, which aims to build a safe enough communication link system to ensure that the remote flying car can maintain reliable communication connection.

[0005] To achieve the above purpose, the present application provides a communication link system, which comprises a ground end communication unit, a ground end antenna, a flying car end communication unit and a flying car end antenna, wherein the ground end antenna comprises a ground end omnidirectional antenna and a ground end high-gain array antenna.

[0006] The flying car end communication unit is configured to send the communication link data of the flying car to the ground end communication unit through the flying car end antenna.

[0007] The ground end communication unit is configured to receive the communication link data of the flying car through the ground end omnidirectional antenna, and when it is detected that the current communication scenario meets the preset condition according to the communication link data, it switches to the ground end high-gain array antenna and communicates with the flying car end communication unit through the ground end high-gain array antenna.

[0008] Optionally, the ground end communication unit comprises a ground control center and a communication transceiver unit, and the communication link data of the flying car comprises signal strength.

[0009] The ground control center is configured to determine whether the signal strength is less than a preset strength threshold, and if so, it is determined that the current communication scenario meets the preset condition, and sends a switching instruction to the communication transceiver unit.

[0010] The communication transceiver unit is configured to switch to the ground high-gain array antenna according to the switching instruction, and communicate with the aerial vehicle communication unit through the ground high-gain array antenna.

[0011] Optionally, the ground communication unit further comprises a servo system, and the aerial vehicle communication link data further comprises position information of the aerial vehicle.

[0012] The ground control center is further configured to send the position information of the aerial vehicle to the servo system when a current communication scenario meets a preset condition.

[0013] The servo system is configured to analyze and calculate antenna pointing information according to the position information of the aerial vehicle, and control the ground high-gain array antenna to point to the aerial vehicle according to the antenna pointing information.

[0014] Optionally, the ground control center is further configured to send a manual switching instruction to the communication transceiver unit when the manual switching instruction is received, and / or send a manual antenna pointing information to the servo system when the manual antenna pointing information is received.

[0015] The communication transceiver unit is further configured to select a target antenna corresponding to the manual switching instruction from the ground omnidirectional antenna and the ground high-gain array antenna, switch to the target antenna, and communicate with the aerial vehicle communication unit through the target antenna.

[0016] The servo system is further configured to adjust the pointing of the ground high-gain array antenna according to the manual antenna pointing information.

[0017] Optionally, the aerial vehicle communication unit is provided with an uplink and a downlink, and the aerial vehicle communication unit comprises a flight control unit, a flight communication transceiver unit, and a plurality of actuators.

[0018] In the downlink, the aerial vehicle antenna receives a ground signal, and the flight communication transceiver unit sends the ground signal to the flight control unit, the flight control unit analyzes the ground signal, determines corresponding actuation information and a target actuator, and sends the actuation information to the target actuator.

[0019] In the uplink, the flight control unit acquires current actuation signals of the plurality of actuators, and sends the current actuation signals to the aerial vehicle antenna through the flight communication transceiver unit, so that the current actuation signals are emitted through the aerial vehicle antenna.

[0020] Optionally, the aerial vehicle end communication unit comprises an aerial vehicle end communication unit in the air and a ground vehicle end communication unit on the ground; and a communication link is arranged between any two of the ground end communication unit, the aerial vehicle end communication unit in the air and the ground vehicle end communication unit on the ground.

[0021] In addition, to achieve the above-mentioned purpose, the application further provides a ground end antenna, which is applied to the communication link system as mentioned above, and comprises:

[0022] a radiation unit, which is a symmetrical dipole structure and comprises an upper dipole unit and a lower dipole unit, the upper dipole unit and the lower dipole unit comprising a first rectangular part, a second rectangular part, a frustum part and a middle main part connected with each other;

[0023] a fixing structure, which is used for fixing the radiation unit to be vertically placed;

[0024] a cable assembly, which comprises an inner core part, an outer conductor part and a communication end, the inner core part being connected with the upper dipole unit, the outer conductor part being connected with the lower dipole unit, and the communication end being connected with a flight communication transceiver unit.

[0025] In addition, to achieve the above-mentioned purpose, the application further provides a ground end antenna, which is applied to the communication link system as mentioned above, and comprises:

[0026] a plurality of radiation units arranged in an array;

[0027] a feed cable, which is used for connecting the plurality of radiation units to a feed network;

[0028] a cable assembly, one end of which is connected with a total port of the feed network, and the other end of which is connected with a communication transceiver unit.

[0029] In addition, to achieve the above-mentioned purpose, the application further provides a ground end high-gain array antenna, which is applied to the communication link system as mentioned above, and comprises:

[0030] a plurality of antenna modules arranged around the ground end omnidirectional antenna, the antenna modules comprising a plurality of sub-antennas arranged in an array.

[0031] In addition, to achieve the above-mentioned purpose, the application further provides a communication control method, which is applied to the communication link system as mentioned above, and the communication link system comprises a ground end communication unit, a ground end antenna, an aerial vehicle end communication unit and an aerial vehicle end antenna, wherein the ground end antenna comprises a ground end omnidirectional antenna and a ground end high-gain array antenna.

[0032] The communication control method comprises:

[0033] The aerial vehicle side communication unit sends communication link data of the aerial vehicle to the ground side communication unit through the aerial vehicle side antenna;

[0034] The ground side communication unit receives the communication link data of the aerial vehicle through the ground side omnidirectional antenna, and when it is detected according to the communication link data that the current communication scenario meets the preset condition, switches to the ground side high-gain array antenna, and communicates with the aerial vehicle side communication unit through the ground side high-gain array antenna.

[0035] The system comprises a ground side communication unit, a ground side antenna, an aerial vehicle side communication unit and an aerial vehicle side antenna. The ground side antenna comprises a ground side omnidirectional antenna and a ground side high-gain array antenna. The aerial vehicle side communication unit sends communication link data of the aerial vehicle to the ground side communication unit through the aerial vehicle side antenna. The ground side communication unit receives the communication link data of the aerial vehicle through the ground side omnidirectional antenna, and when it is detected according to the communication link data that the current communication scenario meets the preset condition, switches to the ground side high-gain array antenna, and communicates with the aerial vehicle side communication unit through the ground side high-gain array antenna. In this way, the near-range and long-range communication links between the ground side and the aerial vehicle are established. The ground side omnidirectional antenna is used to realize reliable communication in a short distance, the ground side high-gain array antenna is used to realize reliable communication in a long distance, and the link switching function is provided, thereby providing a reliable communication platform for flight safety and measurement and control. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a structural block diagram of the first embodiment of the communication link system of the application;

[0037] Figure 2 It is a communication framework schematic diagram of the communication link system of the application;

[0038] Figure 3 It is a communication framework schematic diagram of the aerial vehicle in the communication link system of the application;

[0039] Figure 4 It is a structural block diagram of the second embodiment of the communication link system of the application;

[0040] Figure 5 It is a specific control flow schematic diagram of the communication link system of the application;

[0041] Figure 6 It is a structural schematic diagram of the aerial vehicle side antenna of the application;

[0042] Figure 7This is a schematic diagram showing the installation position of the antenna on the flying car end of the present invention;

[0043] Figure 8 This is a schematic diagram of the structure of the ground-side omnidirectional antenna of the present invention;

[0044] Figure 9 This is a schematic diagram of the structure of the high-gain array antenna at the ground end of the present invention;

[0045] Figure 10 This is a schematic diagram showing the location of the antenna module in this invention;

[0046] Figure 11 This is a schematic diagram of the antenna module in this invention;

[0047] Figure 12 This is a flowchart illustrating the first embodiment of the communication control method of the present invention.

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0050] Reference Figure 1 , Figure 1 This is a structural block diagram of the first embodiment of the communication link system of the present invention.

[0051] like Figure 1 As shown, the communication link system of this embodiment includes: a ground-end communication unit 10, a ground-end antenna 20, a flying car-end communication unit 30, and a flying car-end antenna 40, wherein the ground-end antenna 20 includes a ground-end omnidirectional antenna and a ground-end high-gain array antenna;

[0052] The flying car-end communication unit 30 is used to send the flying car's communication link data to the ground-end communication unit 10 through the flying car-end antenna 40.

[0053] It can be understood that the communication link system of the application includes a ground end core communication link and a flying car end communication link, wherein the ground end core communication link includes a ground end communication unit 10 and a ground end antenna 20, and the flying car end communication link includes a flying car end communication unit 30 and a flying car end antenna 40. The flying car end communication unit 30 receives control instructions from the ground end through the flying car end antenna 40, or sends communication link data of the flying car to the ground end. Specifically, the communication link data of the flying car includes navigation data, flight control data, sensor signals (images, voices, videos, etc.), servo system data, signal strength data, etc. In a specific implementation, the flying car end communication unit 30 includes a communication transceiver unit, a switch, a flight controller control unit, a coding and decoding unit, a plurality of sensor groups, an audio system, a video system, etc.

[0054] The ground end communication unit 10 is configured to receive the communication link data of the flying car through the ground end omnidirectional antenna, and switch to the ground end high-gain array antenna when it is detected according to the communication link data that the current communication scenario meets the preset condition, and communicate with the flying car end communication unit 30 through the ground end high-gain array antenna.

[0055] It should be noted that the current communication scenario meets the preset condition means that the communication between the flying car and the ground end belongs to a long-distance communication scenario. In the early stage of communication between the flying car and the ground end, a low-gain omnidirectional antenna is used to establish an initial communication link, and real-time navigation data, flight control data, sensor signals, servo system data, signal strength data, etc. of the flying car are obtained. Communication link data is achieved through the communication transceiver unit and the switch to the ground control center. The ground control center analyzes the communication link data in real time to determine whether the current communication scenario is a long-distance communication scenario. If so, it is automatically switched to the ground end high-gain array antenna, so that the communication transceiver unit receives the communication link data from the flying car through the ground end high-gain array antenna, or sends control instructions from the ground end to the flying car.

[0056] Optionally, the ground end communication unit 10 analyzes the flying car azimuth data in the communication link data to determine whether the distance between the flying car and the ground end is greater than a preset distance threshold. If so, it is determined that the current communication scenario meets the preset condition, and the ground end high-gain array antenna is switched. The preset distance threshold is a critical value for distinguishing the distance of communication. If the distance between the flying car and the ground end is greater than the preset distance threshold, it means that the distance between the flying car and the ground end is far.

[0057] Optionally, the ground terminal communication unit 10 analyzes the signal strength data in the communication link data to determine whether the current signal strength is less than a preset strength threshold. If yes, it is determined that the current communication scenario meets the preset condition, and the ground terminal high-gain array antenna is switched to. The preset strength threshold is a critical value set in advance to distinguish the strength of the signal strength. If the signal strength between the flying car and the ground terminal is less than the preset strength threshold, it indicates that the signal strength between the flying car and the ground terminal is weak.

[0058] In a specific implementation, referring to Figure 2 , Figure 2 The communication framework schematic diagram of the communication link system of the application is shown in the figure. The ground terminal core communication link includes a ground terminal communication unit 10 and a ground terminal antenna 20. The ground terminal communication unit 10 includes a communication transceiver unit, a switch, a servo system, a ground control center, an AP module and a supporting antenna, and a public network / supervision center. The ground terminal communication unit 10 receives various data of the flying car through the ground terminal antenna 20, such as image data, navigation data, monitoring data, etc. The data is transmitted to the switch through the communication transceiver unit. The ground control center and the supervision center access the switch to obtain the required information. The AP module is set to facilitate other devices to access the ground control center through wireless access to realize flexible control and monitoring of the PC end. The ground control center can transmit flight state instructions, route instructions and other information to the air terminal flying car or the ground terminal flying car through the switch, the communication transceiver unit and the ground terminal antenna 20 to realize flight control.

[0059] Further, the flying car terminal communication unit 30 is provided with an uplink and a downlink. The flying car terminal communication unit 30 includes a flight control unit, a flight communication transceiver unit and a plurality of execution mechanisms.

[0060] In the downlink, the flying car terminal antenna 40 receives the ground terminal signal, and transmits the ground terminal signal to the flight control unit through the flight communication transceiver unit. The flight control unit analyzes the ground terminal signal to determine the execution information corresponding to the ground terminal signal and the target execution mechanism, and transmits the execution information to the target execution mechanism.

[0061] In the uplink, the flight control unit obtains the current execution signal of the plurality of execution mechanisms, and transmits the current execution signal to the flying car terminal antenna 40 through the flight communication transceiver unit, so as to emit the current execution signal through the flying car terminal antenna 40.

[0062] It should be understood that, referring to Figure 3 , Figure 3This is a schematic diagram of the communication framework of the flying car in the communication link system of the present invention. The communication unit 30 at the flying car end also includes a switch. In the downlink of the communication link at the flying car end, the antenna 40 at the flying car end receives signals from the ground end, processes the signals through the communication transceiver unit, and then transmits them to the switch. The switch forwards the signals to the flight control unit, which analyzes the ground end signals and outputs the various signals. In a specific implementation, the multiple actuators include: multiple sensor groups ( Figure 3 The diagram only shows sensor group 1 and sensor group 2, audio system, and video system, etc. If the signal is analyzed as a video signal, it is sent to the video system; if the signal is analyzed as power information, it is sent to the sensor group.

[0063] It should be noted that the current execution signals include various sensor signals, voice signals, video signals, etc., as shown in the reference. Figure 3 The flying car communication unit 30 also includes an encoding and decoding unit. The sensor signals, voice signals, video signals, etc. in the uplink of the flying car communication link are compiled by the encoding and decoding unit and then forwarded to the flying communication transceiver unit via the switch. The flying communication transceiver unit processes the signals and outputs them to the flying car antenna 40, which then transmits the signals.

[0064] Furthermore, the flying car terminal communication unit 30 includes an airborne flying car terminal communication unit 30 and a ground-based flying car terminal communication unit 30; a communication link is provided between any two of the ground-based communication unit 10, the airborne flying car terminal communication unit 30, and the ground-based flying car terminal communication unit 30.

[0065] It should be understood that the airborne vehicle-end communication unit 30 and the ground-based airborne vehicle-end communication unit 30 have the same structure and function. The ground-based core communication link, the airborne vehicle-end communication link, and the ground-based airborne vehicle-end communication link are interconnected in pairs, serving as backup links for each other to improve communication reliability. (Refer to...) Figure 2 When communication between the ground-based core communication link and the airborne vehicle communication link fails, communication can resume via the ground-based core communication link → ground-based airborne vehicle communication link → airborne vehicle communication link, i.e., through a backup link. Optionally, the air-to-ground, air-to-air, and ground-to-ground communication links of the communication link system can employ a multi-point relay scheme or a 5G communication link scheme to achieve remote communication monitoring. Optionally, each link can be designed as a dual-link communication mode to achieve reliable backup.

[0066] The system provided in the embodiment comprises a ground terminal communication unit, a ground terminal antenna, a flying car terminal communication unit and a flying car terminal antenna, the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna; the flying car terminal communication unit sends the communication link data of the flying car to the ground terminal communication unit through the flying car terminal antenna; the ground terminal communication unit receives the communication link data of the flying car through the ground terminal omnidirectional antenna, and switches to the ground terminal high-gain array antenna when it is detected according to the communication link data that the current communication scenario meets the preset condition, and communicates with the flying car terminal communication unit through the ground terminal high-gain array antenna. In the above manner, the near-range and long-range communication links between the ground terminal and the flying car are established, the ground terminal omnidirectional antenna is used to realize reliable communication in a short distance, the ground terminal high-gain array antenna is used to realize reliable communication in a long distance, and the link switching function is provided, thereby providing a reliable communication platform for flight safety and measurement and control.

[0067] Reference Figure 4 , Figure 4 The structure block diagram of the second embodiment of the communication link system of the application is shown in FIG. 2.

[0068] Based on the first embodiment, in the communication link system of the second embodiment, the ground terminal communication unit 10 comprises a ground control center 50 and a communication transceiver unit 60, and the communication link data of the flying car comprises signal strength.

[0069] The ground control center 50 is configured to judge whether the signal strength is less than a preset strength threshold, and if yes, determine that the current communication scenario meets the preset condition, and send a switching instruction to the communication transceiver unit 60.

[0070] The communication transceiver unit 60 is configured to switch to the ground terminal high-gain array antenna according to the switching instruction, and communicate with the flying car terminal communication unit 30 through the ground terminal high-gain array antenna.

[0071] It should be understood that the preset strength threshold is a critical value for distinguishing the strength of the signal strength, and if the signal strength between the flying car and the ground terminal is less than the preset strength threshold, it indicates that the signal strength between the flying car and the ground terminal is weak, at this time, the use of the ground terminal omnidirectional antenna may result in poor communication quality and signal loss, the ground control center 50 determines that the current communication scenario is in a long-distance communication scenario, sends a switching instruction to the communication transceiver unit 60, so that the communication transceiver unit 60 switches to communication with the ground terminal high-gain array antenna, thereby receiving the communication link data from the flying car through the ground terminal high-gain array antenna, or sending the control instruction of the ground terminal to the flying car. Alternatively, the signal strength is evaluated by multiple indicators, such as transmission rate, node distance, etc.

[0072] Further, the ground end communication unit 10 further comprises a servo system 70, and the communication link data of the flying car further comprises position information of the flying car.

[0073] The ground control center 50 is further configured to send the position information of the flying car to the servo system 70 when the current communication scenario meets the preset condition.

[0074] The servo system 70 is configured to analyze and calculate antenna pointing information according to the position information of the flying car, and control the ground end high-gain array antenna to point to the flying car according to the antenna pointing information.

[0075] It should be noted that when the flying car flies to a long distance or the ground flying car drives to a long distance, the ground control center 50 monitors the signal strength in real time, determines the communication quality, and autonomously controls to send an instruction to the communication transceiver unit 60 to switch to using the ground end high-gain array antenna, and simultaneously sends the position information of the flying car in the air or on the ground to the servo system 70. The servo system 70 analyzes and calculates the position to which the array antenna needs to be pointed, drives the motor to rotate to drive the ground end high-gain array antenna to point to the flying car in the air or on the ground, so that the antenna maximum gain beam points to the flying car, and ensures the high-quality communication effect.

[0076] Further, in order to avoid safety problems caused by system abnormalities, the ground control center 50 is further configured to send the manual switching instruction to the communication transceiver unit 60 when receiving the manual switching instruction input by the user, and / or send the manual antenna pointing information to the servo system 70 when receiving the manual antenna pointing information input by the user.

[0077] The communication transceiver unit 60 is further configured to select a target antenna corresponding to the manual switching instruction from the ground end omnidirectional antenna and the ground end high-gain array antenna, switch to the target antenna, and communicate with the flying car end communication unit 30 through the target antenna.

[0078] The servo system 70 is further configured to adjust the pointing of the ground end high-gain array antenna according to the manual antenna pointing information.

[0079] It should be understood that the embodiment provides a manual control mode, so that manual control can be performed when the system is abnormal, and the safety of the system is improved. Alternatively, the ground control center 50 obtains the manual switching instruction and / or the manual antenna pointing information transmitted by the public network / supervision center or the AP module from the switch. Alternatively, in a certain link of automatic control, if the unresponsive problem occurs within the agreed time, the manual control mode is automatically switched to, the user is prompted to manually input the instruction, and the antenna form is directly selected and switched or the antenna direction information is directly output to the servo system 70.

[0080] It should be noted that the above description is only a specific implementation of the communication link system of the application. Figure 5 , Figure 5 The specific control flow diagram of the communication link system of the application is shown in the figure. First, after the system is started, each module is powered on, and the system is self-checked. After the self-checking is passed, the ground core communication link and the aerial and ground flying car are suggested to establish an initial link, and enter an automatic control mode. The ground control center 50 reads the communication link data of the flying car in real time, including navigation data, flight control data, servo system 70 data, signal strength data, etc. The signal strength is comprehensively evaluated through multiple indicators: as the flying car is farther and farther away from the ground end, the communication distance gradually increases, and the signal strength will also attenuate due to the increase of the distance. After the communication link is established, the ground control center 50 judges the signal strength every certain period of time: whether the signal strength meets the threshold requirement. If it meets the requirement, it is considered that the signal quality is strong, and the omnidirectional antenna is used for short-distance communication through instruction control; if the signal strength does not meet the threshold requirement, it is considered that the signal needs to be enhanced, and the high-gain array antenna is enabled through instruction control. The ground control center 50 obtains the direction information of the flying car in real time through the communication link, and obtains the pointing information of the antenna, i.e. the angle information of the antenna that needs to be rotated, through the computer solving the direction information. The servo system 70 obtains the pointing information of the antenna, and drives the motor to adjust the pointing of the antenna to the flying car. The high-gain antenna is used to improve the communication quality, achieve long-distance / ultra-long-distance communication, and then the signal strength information is reacquired to enter the next cycle. In the specific implementation, if an unresponsive problem occurs in a certain link of automatic control, the manual control mode can be immediately switched in, the antenna form is directly selected, or the antenna direction information calculated by the control center is directly output to the servo system 70.

[0081] In the embodiment, the antenna form is switched according to the threshold judgment result of the signal strength, and the pointing of the antenna is controlled according to the direction information of the flying car, so that the maximum gain beam of the antenna points to the flying car, and the high-quality communication effect is ensured, which provides a reliable communication platform for flight safety and measurement and control.

[0082] It should be noted that the above description is only a specific implementation of the communication link system of the application. Figure 6 , Figure 6Figure 1 is a schematic diagram of the structure of the aerial terminal of the flying car according to the present application. The embodiment of the present application also provides an aerial terminal of a flying car, which is applied to the communication link system as described above, and comprises:

[0083] The radiation unit is of a symmetrical dipole structure, comprising an upper dipole unit and a lower dipole unit, which comprise a first rectangular portion, a second rectangular portion, a frustum portion and an intermediate main body portion connected to each other;

[0084] The fixing structure is used for fixing the radiation unit to be vertically placed;

[0085] The cable assembly comprises an inner core portion, an outer conductor portion and a communication end, the inner core portion is connected to the upper dipole unit, the outer conductor portion is connected to the lower dipole unit, and the communication end is connected to a flying communication transceiver unit.

[0086] It should be understood that, referring to Figure 6 , the aerial terminal of the flying car at least comprises a radiation unit 1, a fixing structure 2 and a cable assembly 3, wherein the radiation unit 1 is of a symmetrical dipole structure, and is divided into an upper dipole unit and a lower dipole unit, each of which has a structure design of four different portions: two pairs of rectangulars as the first and second portions, a frustum portion as the third portion and an intermediate main body portion as the fourth portion, the four portions are connected to each other, and the dimensions of the portions are changed for adjusting the bandwidth and optimizing the circuit and radiation performance. The fixing structure 2 is used for fixing the radiation unit to be vertically placed, so that the antenna realizes a good omnidirectional performance coverage in vertical polarization. Optionally, the radiation unit 1 is of a PCB surface structure, a full metal surface structure, a PCB body structure, a full metal body structure or the like, and the embodiment is not limited thereto, and the PCB form is taken as an example for description: the upper and lower dipole units are connected through metallized vias to lead the circuit to the back of the PCB, and a soldering point is designed to realize good matching. The inner core and the outer conductor of the cable assembly 3 are respectively connected to the soldering point on the back of the PCB of the upper and lower dipole units at one end, and are connected to the input and output ends of the communication transceiver unit at the other end, wherein the inner core portion of the cable assembly 3 is connected to the upper dipole unit, and the outer conductor of the cable assembly 3 is connected to the lower dipole unit.

[0087] Further, the aerial terminal of the flying car further comprises a radome 4, which is a beautifying structure, fully considering the beautifying effect and aerodynamic principle, and is beneficial to visual appreciation and smooth flight. The radiation unit 1 is installed in the radome 4 through the fixing structure 2, and the radome 4 is installed at the lower part of the flying car.

[0088] Further, a plurality of aerial terminals of the flying car are installed on the flying car, referring to Figure 7 , Figure 7 Figure 2 is a schematic diagram of the installation position of the aerial terminal of the flying car according to the present application, Figure 7The installation mode of two pairs of omnidirectional antennas is shown in the figure, and the two pairs of antennas are located at the lower part of the flying car. Preferably, the interval between the antennas is greater than 400 mm, which is beneficial to improve the isolation between the antennas.

[0089] Optionally, the flying car end antenna is designed by homomorphism optimization, and can be used for flying car data transmission communication system, image transmission communication system, remote control communication system, 4G communication system, 5G communication system and the like according to the corresponding frequency band.

[0090] The embodiment provides a flying car end antenna structure, which provides hardware support for the communication link between the flying car and the ground end, improves the communication quality, and provides a reliable communication platform for flight safety and measurement and control.

[0091] In addition, the technical details not described in detail in the embodiment can be referred to the communication link system provided by any embodiment of the application, which will not be described here.

[0092] Reference Figure 8 , Figure 8 The figure is a structural schematic diagram of the ground end omnidirectional antenna. The embodiment of the application also provides a ground end omnidirectional antenna, which is applied to the communication link system as described above, and the ground end omnidirectional antenna comprises:

[0093] a plurality of radiation units arranged in an array;

[0094] a feeding cable for connecting the plurality of radiation units to a feeding network;

[0095] a cable assembly connected to a total port of the feeding network at one end and connected to a communication transceiver unit at the other end.

[0096] It should be understood that the number of radiation units can be set according to the gain requirement. Reference Figure 8 For example, three radiation units are taken as an example: the ground end omnidirectional antenna is an array structure, which comprises three radiation units a, a feeding cable b, a feeding network c and a cable assembly d. The three radiation units a are arranged longitudinally to achieve a high gain effect. The radiation units of the ground end omnidirectional antenna are the same as the radiation units of the flying car end antenna, and the difference lies in the installation environment: the flying car end antenna has one radiation unit, and the ground end omnidirectional antenna has three radiation units arranged in an array. Specifically, each radiation unit a is connected to the feeding network c through the feeding cable b, the number of output ends of the feeding network c is consistent with the number of radiation units a, and the cable assembly d is connected to the power division network total port of the feeding network c at one end and connected to the communication transceiver unit at the other end. Further, the ground end omnidirectional antenna further comprises a radome e and a clamping piece f. The number of radomes e can be one or consistent with the number of radiation units a.

[0097] The embodiment provides a ground terminal omnidirectional antenna, which provides hardware support for a communication link between a flying vehicle and a ground terminal, improves communication quality, and provides a reliable communication platform for flight safety and measurement and control.

[0098] In addition, technical details not described in detail in the embodiment can be referred to the communication link system provided by any embodiment of the application, and will not be described here.

[0099] Referring to Figure 9 , Figure 9 The figure is a structural schematic diagram of a ground terminal high-gain array antenna. The embodiment of the application further provides a ground terminal high-gain array antenna, which is applied to the communication link system as described above, and the ground terminal high-gain array antenna comprises:

[0100] A plurality of antenna modules are arranged around the ground terminal omnidirectional antenna, and the antenna modules comprise a plurality of array-arranged sub-antennas.

[0101] It should be understood that the antenna modules are arranged around the ground terminal omnidirectional antenna, and the number of the antenna modules can be set according to actual conditions, and the embodiment is described by taking the number of the antenna modules as 3: referring to Figure 10 , Figure 10 The figure is a position schematic diagram of the antenna module in the application; the antenna module has three sets, each of which is responsible for a 120-degree area to realize omnidirectional coverage, and in a specific implementation, the three sets of antenna modules can independently work and independently point to the air or the ground flying vehicle under the control of a servo system. Referring to Figure 11 , Figure 11 The figure is a structural schematic diagram of the antenna module in the application; the antenna module is an array structure and comprises a plurality of array-arranged sub-antennas, and optionally, the array antenna can be designed as a large-scale or super-large-scale antenna array to realize multi-beam tracking communication for more flying vehicles.

[0102] Further, the ground terminal high-gain array antenna further comprises a plurality of mounting assemblies, the plurality of antenna modules are respectively mounted on the plurality of mounting assemblies, and the mounting assemblies are adjusted in pitch under the control of a servo system to realize signal coverage at different angles. Optionally, in addition to the mounting mode of mechanical pitch adjustment, the antenna module can also realize electrically scanned beam tracking through a phase shifter to realize signal coverage at different angles.

[0103] The embodiment provides a ground terminal high-gain array antenna, which provides hardware support for a communication link between a flying vehicle and a ground terminal, improves communication quality, and provides a reliable communication platform for flight safety and measurement and control.

[0104] In addition, technical details not described in detail in the embodiment can be referred to the communication link system provided by any embodiment of the application, and will not be described here.

[0105] Referring to Figure 12 , Figure 12 is a flowchart of a first embodiment of the communication control method of the present application.

[0106] As Figure 12 shown, the communication control method proposed by the embodiment of the present application is applied to the communication link system as described above, which comprises a ground terminal communication unit, a ground terminal antenna, a flying car terminal communication unit and a flying car terminal antenna, wherein the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna.

[0107] The communication control method comprises:

[0108] Step S10: The flying car terminal communication unit sends the communication link data of the flying car to the ground terminal communication unit through the flying car terminal antenna.

[0109] Step S20: The ground terminal communication unit receives the communication link data of the flying car through the ground terminal omnidirectional antenna, and when it is detected according to the communication link data that the current communication scenario meets the preset condition, it switches to the ground terminal high-gain array antenna and communicates with the flying car terminal communication unit through the ground terminal high-gain array antenna.

[0110] It should be understood that the above is only an example, and the technical solutions of the present application do not constitute any limitation. In specific applications, those skilled in the art can set it up according to the needs, and the present application does not limit it.

[0111] The system proposed by the embodiment comprises a ground terminal communication unit, a ground terminal antenna, a flying car terminal communication unit and a flying car terminal antenna, the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna; the flying car terminal communication unit sends the communication link data of the flying car to the ground terminal communication unit through the flying car terminal antenna; the ground terminal communication unit receives the communication link data of the flying car through the ground terminal omnidirectional antenna, and when it is detected according to the communication link data that the current communication scenario meets the preset condition, it switches to the ground terminal high-gain array antenna and communicates with the flying car terminal communication unit through the ground terminal high-gain array antenna. Through the above-mentioned manner, the near-range and long-range communication link between the ground terminal and the flying car is established, the ground terminal omnidirectional antenna is used to realize reliable communication in a short distance, the ground terminal high-gain array antenna is used to realize reliable communication in a long distance, and the link switching function is provided, thereby providing a reliable communication platform for flight safety and measurement and control.

[0112] In an embodiment, the ground terminal communication unit comprises a ground control center and a communication transceiver unit, and the communication link data of the flying car comprises signal strength.

[0113] The step S20 comprises:

[0114] The ground control center judges whether the signal strength is less than a preset strength threshold, if yes, it is determined that the current communication scenario meets the preset condition, and sends a switching instruction to the communication transceiver unit;

[0115] The communication transceiver unit switches to the ground high-gain array antenna according to the switching instruction, and communicates with the flying car end communication unit through the ground high-gain array antenna.

[0116] In an embodiment, the ground end communication unit further comprises a servo system, and the flying car communication link data further comprises the azimuth information of the flying car;

[0117] After the step S20, the method further comprises:

[0118] The ground control center sends the azimuth information of the flying car to the servo system when the current communication scenario meets the preset condition;

[0119] The servo system analyzes and calculates the antenna pointing information according to the azimuth information of the flying car, and controls the ground high-gain array antenna to point to the flying car according to the antenna pointing information.

[0120] In an embodiment, the method further comprises:

[0121] The ground control center sends the manual switching instruction to the communication transceiver unit when receiving the user input manual switching instruction, and / or sends the manual antenna pointing information to the servo system when receiving the user input manual antenna pointing information;

[0122] The communication transceiver unit selects a target antenna corresponding to the manual switching instruction from the ground omnidirectional antenna and the ground high-gain array antenna, switches to the target antenna, and communicates with the flying car end communication unit through the target antenna;

[0123] The servo system adjusts the pointing of the ground high-gain array antenna according to the manual antenna pointing information.

[0124] In an embodiment, the flying car end communication unit is provided with uplink and downlink, and the flying car end communication unit comprises a flight control unit, a flight communication transceiver unit, and a plurality of actuators;

[0125] The method further comprises:

[0126] In the downlink, the aerial vehicle end antenna receives a ground end signal, and sends the ground end signal to the flight control unit through the flight communication transceiver unit, the flight control unit analyzes the ground end signal, determines the execution information corresponding to the ground end signal and the target execution mechanism, and sends the execution information to the target execution mechanism.

[0127] In the uplink, the flight control unit acquires the current execution signal of the plurality of execution mechanisms, and sends the current execution signal to the aerial vehicle end antenna through the flight communication transceiver unit, so as to send the current execution signal through the aerial vehicle end antenna.

[0128] In an embodiment, the aerial vehicle end communication unit includes an aerial aerial vehicle end communication unit and a ground aerial vehicle end communication unit; any two of the ground end communication unit, the aerial aerial vehicle end communication unit and the ground aerial vehicle end communication unit are provided with a communication link.

[0129] It should be noted that the above-described workflow is only illustrative and does not limit the scope of protection of the present application. In actual application, a person skilled in the art can select part or all of them according to actual needs to achieve the purpose of the embodiment scheme, which is not limited here.

[0130] In addition, technical details not described in detail in the embodiment can be referred to the communication link system provided by any embodiment of the present application, which will not be repeated here.

[0131] In addition, it should be noted that in this paper, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or system. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of another identical element in the process, method, article or system including the element.

[0132] The above-mentioned embodiment number of the present application is only for description, not representing the advantages and disadvantages of the embodiments.

[0133] Those skilled in the art can clearly understand the above-mentioned embodiment method can be realized by means of software and the necessary general hardware platform, of course, can also be through hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application essentially or say the part of the prior art contribution can be embodied in the form of software products, the computer software product is stored in a storage medium (such as read only memory (Read Only Memory, ROM) / RAM, disk, optical disk), including a number of instructions to make a terminal device (may be a mobile phone, computer, server, or network equipment, etc.) executes the method described in various embodiments of the present application.

[0134] The above is only the preferred embodiment of the present application, not therefore limit the patent scope of the present application, any equivalent structure or equivalent flow transformation using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A communication link system, characterized in that, The communication link system includes: a ground-end communication unit, a ground-end antenna, a flying car-end communication unit, and a flying car-end antenna, wherein the ground-end antenna includes a ground-end omnidirectional antenna and a ground-end high-gain array antenna; The flying car-end communication unit is used to send the flying car's communication link data to the ground-end communication unit through the flying car-end antenna; The ground-end communication unit is used to receive communication link data of the flying car through the ground-end omnidirectional antenna. When the communication link data detects that the current communication scenario meets the preset conditions, it switches to the ground-end high-gain array antenna and communicates with the flying car-end communication unit through the ground-end high-gain array antenna. The flying car terminal communication unit is equipped with an uplink and a downlink, and the flying car terminal communication unit includes: a flight control unit, a flight communication transceiver unit, and multiple actuators; In the downlink, the flying car antenna receives ground signals and transmits the ground signals to the flight control unit through the flight communication transceiver unit. The flight control unit analyzes the ground signals, determines the execution information and target actuator corresponding to the ground signals, and sends the execution information to the target actuator. In the uplink, the flight control unit acquires the current execution signals of the plurality of actuators and transmits the current execution signals to the flight vehicle antenna through the flight communication transceiver unit, so as to transmit the current execution signals through the flight vehicle antenna; The flying car-end communication unit also includes a switch. In the downlink of the flying car-end communication link, the flying car-end antenna receives ground-end signals, processes the signals through the communication transceiver unit, and transmits them to the switch. The switch then forwards the signals to the flight control unit, which analyzes the ground-end signals and outputs each signal.

2. The communication link system as described in claim 1, characterized in that, The ground-based communication unit includes a ground control center and a communication transceiver unit, and the communication link data of the flying car includes signal strength; The ground control center is used to determine whether the signal strength is less than a preset strength threshold. If so, it determines that the current communication scenario meets the preset conditions and sends a switching command to the communication transceiver unit. The communication transceiver unit is used to switch to the ground-side high-gain array antenna according to the switching command, and communicate with the flying car-side communication unit through the ground-side high-gain array antenna.

3. The communication link system as described in claim 2, characterized in that, The ground-based communication unit also includes a servo system, and the communication link data of the flying car also includes the flying car's orientation information; The ground control center is also used to send the location information of the flying car to the servo system when the current communication scenario meets the preset conditions; The servo system is used to analyze and calculate antenna pointing information based on the orientation information of the flying car, and control the ground-based high-gain array antenna to point towards the flying car based on the antenna pointing information.

4. The communication link system as described in claim 3, characterized in that, The ground control center is also used to send the manual switching command to the communication transceiver unit when it receives the manual switching command input by the user, and / or send the manual antenna pointing information to the servo system when it receives the manual antenna pointing information input by the user. The communication transceiver unit is also used to select a target antenna corresponding to the manual switching command from the ground-end omnidirectional antenna and the ground-end high-gain array antenna, switch to the target antenna, and communicate with the flying car-end communication unit through the target antenna; The servo system is also used to adjust the direction of the ground-end high-gain array antenna according to the manual antenna pointing information.

5. The communication link system as described in claim 1, characterized in that, The flying car communication unit includes an airborne flying car communication unit and a ground-based flying car communication unit; a communication link is provided between any two of the ground-based communication unit, the airborne flying car communication unit, and the ground-based flying car communication unit.

6. A flying car-end antenna, characterized in that, The flying car-end antenna is used in the communication link system as described in any one of claims 1-5, and the flying car-end antenna comprises: The radiating unit is a symmetrical oscillator structure, including an upper pole unit and a lower pole unit. The upper pole unit and the lower pole unit include a first rectangular part, a second rectangular part, a frustum part, and a middle main body part that are connected to each other. A fixing structure is used to fix the radiating unit in a vertical position; The cable assembly includes an inner core, an outer conductor, and a communication terminal. The inner core is connected to the upper pole subunit, the outer conductor is connected to the lower pole subunit, and the communication terminal is connected to a flight communication transceiver unit.

7. A ground-based omnidirectional antenna, characterized in that, The ground-end omnidirectional antenna is used in the communication link system as described in any one of claims 1-5, and the ground-end omnidirectional antenna comprises: Multiple radiating elements arranged in an array; Feed cables are used to connect the plurality of radiating units to the feed network; The cable assembly is connected at one end to the main port of the power supply network and at the other end to the communication transceiver unit.

8. A ground-based high-gain array antenna, characterized in that, The ground-end high-gain array antenna is used in the communication link system as described in any one of claims 1-5, and the ground-end high-gain array antenna comprises: Multiple antenna modules are arranged around the omnidirectional antenna at the ground end, and each antenna module includes multiple sub-antennas arranged in an array.

9. A communication control method, characterized in that, The communication control method is applied to a communication link system as described in any one of claims 1-5. The communication link system includes: a ground-end communication unit, a ground-end antenna, a flying car-end communication unit, and a flying car-end antenna. The ground-end antenna includes a ground-end omnidirectional antenna and a ground-end high-gain array antenna. The flying car-end communication unit is provided with an uplink and a downlink. The flying car-end communication unit includes: a flight control unit, a flight communication transceiver unit, and multiple actuators. The flying car-end communication unit also includes a switch. The communication control method includes: The flying car-end communication unit transmits the flying car's communication link data to the ground-end communication unit via the flying car-end antenna; The ground-end communication unit receives communication link data from the flying car through the ground-end omnidirectional antenna. When it detects that the current communication scenario meets preset conditions based on the communication link data, it switches to the ground-end high-gain array antenna and communicates with the flying car-end communication unit through the ground-end high-gain array antenna. The method further includes: In the downlink, the flying car antenna receives ground signals and transmits the ground signals to the flight control unit through the flight communication transceiver unit. The flight control unit analyzes the ground signals, determines the execution information and target actuator corresponding to the ground signals, and sends the execution information to the target actuator. In the uplink, the flight control unit acquires the current execution signals of the plurality of actuators and transmits the current execution signals to the flight vehicle antenna through the flight communication transceiver unit, so as to transmit the current execution signals through the flight vehicle antenna; The method further includes: in the downlink of the communication link at the flying car end, the antenna at the flying car end receives the signal at the ground end, processes the signal through the communication transceiver unit, transmits it to the switch, forwards it to the flight control unit through the switch, and the flight control unit analyzes the signal at the ground end and outputs each signal.

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