CN116248157A - Communication link system, antenna, and communication control method - Google Patents

Abstract

The invention belongs to the technical field of communication and discloses a communication link system, an antenna and a communication control method. The system comprises: the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna; the flying car end communication unit sends communication link data of the flying car to the ground end communication unit through the flying car end antenna; the ground terminal communication unit receives communication link data of the aerocar through the ground terminal omnidirectional antenna, and when the fact that the current communication scene meets the preset condition is detected, the ground terminal communication unit is switched to the ground terminal high-gain array antenna, and the ground terminal high-gain array antenna is used for communicating with the aerocar terminal communication unit. The invention establishes short-range and long-range communication links between the ground end and the flying car, adopts the ground end high-gain array antenna to realize long-range reliable communication, and provides a reliable communication platform for flying safety and measurement and control.

Description

Communication link system, antenna, and communication control method

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a communications link system, an antenna, and a communications control method.

Background

At present, most of civil unmanned aerial vehicles are imperfect in communication systems, low in safety and incapable of realizing remote and beyond-line-of-sight communication. The aerocar can run on land or fly in the air, and the safety is very important for the manned aerocar, so that a communication link system with enough safety needs to be built, and the remote aerocar can be ensured to maintain reliable communication connection.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The invention mainly aims to provide a communication link system, an antenna and a communication control method, aiming at setting up a communication link system which is safe enough and ensuring that a remote aerocar can maintain reliable communication connection.

To achieve the above object, the present invention provides a communication link system including: 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 end communication unit is used for sending communication link data of the flying car to the ground end communication unit through the flying car end antenna;

The ground terminal communication unit is used for receiving the communication link data of the aerocar through the ground terminal omnidirectional antenna, switching to the ground terminal high-gain array antenna when the current communication scene is detected to meet the preset condition according to the communication link data, and communicating with the aerocar terminal communication unit through the ground terminal high-gain array antenna.

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 intensity;

the ground control center is used for judging whether the signal intensity is smaller than a preset intensity threshold value, if yes, judging that the current communication scene meets preset conditions, and sending a switching instruction to the communication receiving and transmitting unit;

the communication receiving and transmitting unit is used for switching to the ground end high-gain array antenna according to the switching instruction, and communicating with the flying car end communication unit through the ground end high-gain array antenna.

Optionally, the ground-end communication unit further comprises a servo system, and the communication link data of the aerocar further comprises azimuth information of the aerocar;

The ground control center is further used for sending azimuth information of the flying automobile to the servo system when the current communication scene meets preset conditions;

the servo system is used for analyzing and calculating antenna pointing information according to the azimuth information of the flying automobile and controlling the ground-end high-gain array antenna to point to the flying automobile according to the antenna pointing information.

Optionally, the ground control center is further configured to send a manual switching instruction to the communication transceiver unit when receiving the manual switching instruction input by the user, and/or send manual antenna pointing information to the servo system when receiving the manual antenna pointing information input by the user;

the communication transceiver unit is further configured to select a target antenna corresponding to the manual switching instruction from the ground-side omni-directional antenna and the ground-side high-gain array antenna, switch the target antenna to the target antenna, and communicate with the aerocar-side communication unit through the target antenna;

the servo system is also used for adjusting the pointing direction of the ground-end high-gain array antenna according to the manual antenna pointing information.

Optionally, the flying car side communication unit is provided with an uplink and a downlink, and the flying car side communication unit includes: the device comprises a flight control unit, a flight communication receiving and transmitting unit and a plurality of executing mechanisms;

In the downlink, the flying car end antenna receives a ground end signal, the ground end signal is sent to the flying control unit through the flying communication receiving and transmitting unit, the flying control unit analyzes the ground end signal, determines execution information and a target executing mechanism corresponding to the ground end signal, and sends the execution information to the target executing mechanism;

in the uplink, the flight control unit acquires current execution signals of the execution mechanisms, and sends the current execution signals to the flying car end antenna through the flight communication receiving and transmitting unit so as to send the current execution signals through the flying car end antenna.

Optionally, the flying car end communication unit comprises an air flying car end communication unit and a ground flying car end communication unit; the ground terminal communication unit, the aerial vehicle terminal communication unit and any two communication units among the ground vehicle terminal communication unit are provided with communication links.

In addition, in order to achieve the above object, the present invention further provides a flying car end antenna, which is applied to the above communication link system, the flying car end antenna comprising:

The radiating unit is of a symmetrical oscillator structure and comprises an upper pole subunit and a lower pole subunit, wherein the upper pole subunit and the lower pole subunit comprise a first rectangular part, a second rectangular part, a frustum part and a middle main body part which are connected with each other;

a fixing structure for fixing the radiation unit to be vertically placed;

the cable assembly comprises an inner core part, an outer conductor part and a communication end, wherein the inner core part is connected with the upper pole subunit, the outer conductor part is connected with the lower pole subunit, and the communication end is connected with the flight communication receiving and transmitting unit.

In addition, to achieve the above object, the present invention also proposes a ground-side omni-directional antenna applied to the communication link system as described above, the ground-side omni-directional antenna comprising:

a plurality of radiation units arranged in an array;

a feed cable for connecting the plurality of radiating elements to a feed network;

and one end of the cable assembly is connected with the main port of the feed network, and the other end of the cable assembly is connected with the communication receiving and transmitting unit.

In addition, in order to achieve the above object, the present invention also proposes a ground-side high-gain array antenna, which is applied to the communication link system as described above, comprising:

And the antenna modules are arranged around the ground-end omni-directional antenna and comprise a plurality of sub-antennas which are arranged in an array manner.

In addition, in order to achieve the above object, the present invention also proposes a communication control method applied to a communication link system as described above, the communication link system comprising: 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 communication control method comprises the following steps:

the flying car end communication unit sends communication link data of the flying car to the ground end communication unit through the flying car end antenna;

the ground terminal communication unit receives the communication link data of the aerocar through the ground terminal omnidirectional antenna, and when the current communication scene is detected to meet the preset condition according to the communication link data, the communication link data are switched to the ground terminal high-gain array antenna, and the ground terminal high-gain array antenna is used for communicating with the aerocar terminal communication unit.

The system provided by the invention comprises: the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna; the flying car end communication unit sends communication link data of the flying car to the ground end communication unit through the flying car end antenna; the ground terminal communication unit receives communication link data of the aerocar through the ground terminal omni-directional antenna, and when the current communication scene is detected to meet the preset condition according to the communication link data, the communication link data are switched to the ground terminal high-gain array antenna, and the ground terminal high-gain array antenna is used for communicating with the aerocar terminal communication unit. By the method, short-range and long-range communication links between the ground end and the aerocar are established, short-range reliable communication is realized by adopting the ground end omnidirectional antenna, long-range reliable communication is realized by adopting the ground end high-gain array antenna, a link switching function is provided, and a reliable communication platform is provided for flight safety and measurement and control.

Drawings

FIG. 1 is a block diagram of a first embodiment of a communication link system of the present invention;

FIG. 2 is a schematic diagram of a communication framework of the communication link system of the present invention;

FIG. 3 is a schematic illustration of a communication framework of a flying car in the communication link system of the present invention;

FIG. 4 is a block diagram of a second embodiment of a communication link system of the present invention;

FIG. 5 is a schematic diagram of a specific control flow of the communication link system of the present invention;

FIG. 6 is a schematic view of a flying car end antenna according to the present invention;

FIG. 7 is a schematic view of the mounting location of the flying car end antenna of the present invention;

fig. 8 is a schematic structural diagram of a ground-side omni-directional antenna according to the present invention;

fig. 9 is a schematic structural diagram of a ground-side high-gain array antenna according to the present invention;

FIG. 10 is a schematic diagram of the position of an antenna module according to the present invention;

FIG. 11 is a schematic diagram of an antenna module according to the present invention;

fig. 12 is a flowchart of a communication control method according to a first embodiment of the present invention.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

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

Referring to fig. 1, fig. 1 is a block diagram of a first embodiment of a communication link system according to the present invention.

As shown in fig. 1, the communication link system of the present embodiment includes: a ground-side communication unit 10, a ground-side antenna 20, a flying car-side communication unit 30, and a flying car-side antenna 40, wherein the ground-side antenna 20 includes a ground-side omni-directional antenna and a ground-side high-gain array antenna;

the flying car end communication unit 30 is configured to send communication link data of the flying car to the ground end communication unit 10 through the flying car end antenna 40.

It will be appreciated that the communication link system of the present invention comprises a ground side core communication link comprising a ground side communication unit 10 and a ground side antenna 20 and a flying car side communication link comprising a flying car side communication unit 30 and a flying car side antenna 40. The flying car side communication unit 30 receives a control instruction from the ground side through the flying car side antenna 40 or transmits communication link data of the flying car to the ground side. Specifically, the communication link data of the flying car includes: navigation data, flight control data, sensor signals (image, voice, video, etc.), servo system data, signal strength data, etc. In a specific implementation, the flying car side communication unit 30 includes: the system comprises a communication receiving and transmitting unit, a switch, a flight controller control unit, a coding and decoding unit, a plurality of sensor groups, an audio system, a video system and the like.

The ground-side communication unit 10 is configured to receive, via the ground-side omni-directional antenna, communication link data of the aerocar, and switch to the ground-side high-gain array antenna when detecting that the current communication scene meets a preset condition according to the communication link data, and communicate with the aerocar-side communication unit 30 via the ground-side high-gain array antenna.

It should be noted that the current communication scenario meeting the preset condition means that the communication between the aerocar and the ground terminal belongs to a long-distance communication scenario. In the earlier stage of communication between the aerocar and the ground terminal, an initial communication link is established by using a low-gain omnidirectional antenna, communication link data such as navigation data, flight control data, sensor signals, servo system data, signal intensity data and the like of the aerocar are acquired in real time, the communication link data reach a ground control center through a communication receiving and transmitting unit and a switch, the ground control center analyzes the communication link data in real time to judge whether the communication link data are in a long-distance communication scene currently or not, if so, the communication link data are automatically and intelligently switched to a ground terminal high-gain array antenna, so that the communication receiving and transmitting unit receives the communication link data from the aerocar through the ground terminal high-gain array antenna or transmits a control instruction of the ground terminal to the aerocar.

Optionally, the ground-end communication unit 10 analyzes the azimuth data of the aerocar in the communication link data, determines whether the distance between the aerocar and the ground end is greater than a preset distance threshold, if yes, determines that the current communication scene meets the preset condition, and switches to the ground-end high-gain array antenna. The preset distance threshold is a preset critical value used for distinguishing the distance between the communication and the ground, and if the distance between the flying car and the ground is larger than the preset distance threshold, the distance between the flying car and the ground is characterized as being far.

Optionally, the ground-side communication unit 10 analyzes the signal strength data in the communication link data, determines whether the current signal strength is smaller than a preset strength threshold, if yes, determines that the current communication scene meets the preset condition, and switches to the ground-side high-gain array antenna. The preset intensity threshold is a preset critical value for distinguishing the intensity of the signal, and if the intensity of the signal between the flying car and the ground end is smaller than the preset intensity threshold, the signal between the flying car and the ground end is characterized as weak.

In a specific implementation, referring to fig. 2, fig. 2 is a schematic diagram of a communication frame of the communication link system of the present invention, where a ground-side core communication link includes a ground-side communication unit 10 and a ground-side antenna 20, and the ground-side communication unit 10 includes: the system comprises a communication receiving and transmitting unit, a switch, a servo system, a ground control center, an AP module, a matched antenna and a public network/supervision center. The ground-side communication unit 10 receives various data of the flying car, such as image data, navigation data, monitoring data, etc., through the ground-side antenna 20, reaches the switch through the communication transceiver unit, and the ground control center and the supervision center access the switch to acquire the required information; the AP module is arranged, so that other devices can be conveniently connected to the ground control center through wireless access, and flexible control and monitoring of the PC end are realized; the ground control center can transmit information such as flight status instructions, route instructions and the like to the air-end flying car or the ground-end flying car through the switch, the communication transceiver unit and the ground-end antenna 20 to realize flight control.

Further, the flying car side communication unit 30 is provided with an uplink and a downlink, and the flying car side communication unit 30 includes: the device comprises a flight control unit, a flight communication receiving and transmitting unit and a plurality of executing mechanisms;

in the downlink, the flying car end antenna 40 receives a ground end signal, and sends the ground end signal to the flying control unit through the flying communication transceiver unit, the flying control unit analyzes the ground end signal, determines execution information and a target executing mechanism corresponding to the ground end signal, and sends the execution information to the target executing mechanism;

in the uplink, the flight control unit acquires current execution signals of the plurality of execution mechanisms, and sends the current execution signals to the vehicle-end antenna 40 through the flight communication transceiver unit so as to send the current execution signals through the vehicle-end antenna 40.

It should be understood that referring to fig. 3, fig. 3 is a schematic diagram of a communication frame of a flying car in the communication link system of the present invention, the flying car end communication unit 30 further includes a switch, the flying car end antenna 40 in the downlink of the flying car end communication link receives a ground end signal, the ground end signal is transmitted to the switch after being processed by the communication transceiver unit, and is forwarded to the flight control unit via the switch, and the flight control unit analyzes the ground end signal and outputs each path of signal. In a specific implementation, the plurality of actuators includes: a plurality of sensor groups (only sensor group 1 and sensor group 2 are shown in fig. 3), an audio system, a video system, and the like, and if the sensor group is analyzed as a video signal, the sensor group is transmitted to the video system, and if the sensor group is analyzed as power information, the sensor group is transmitted to the video system.

The currently executed signals include sensor signals, voice signals, video signals, and the like, and referring to fig. 3, the car-end communication unit 30 further includes a codec unit, and the sensor signals, voice signals, video signals, and the like in each path in the uplink of the car-end communication link are compiled by the codec unit and then forwarded to the car-end communication transceiver unit via the switch, the car-end communication transceiver unit processes each path of signals and outputs the processed signals to the car-end antenna 40, and the car-end antenna 40 transmits the signals.

Further, the flying car end communication unit 30 includes an air flying car end communication unit 30 and a ground flying car end communication unit 30; a communication link is provided between any two of the ground-side communication unit 10, the air-vehicle-side communication unit 30 and the ground-vehicle-side communication unit 30.

It should be understood that the air-borne vehicle-end communication unit 30 and the ground-borne vehicle-end communication unit 30 have the same structure and function, and the ground-borne core communication link, the air-borne vehicle-end communication link and the ground-borne vehicle-end communication link are mutually communicated in pairs, are backup links, and improve communication reliability. Referring to fig. 2, when an abnormality occurs in communication between the ground-side core communication link and the air-flying car-side communication link, communication can be performed through the ground-side core communication link < - > ground-flying car-side communication link < - > air-flying car-side communication link, that is, communication is realized through a backup link. Alternatively, the air-to-ground communication, air-to-air communication and ground communication link of the communication link system can adopt a multipoint relay scheme or a 5G communication link scheme to realize remote communication monitoring. Alternatively, each link may be designed to achieve reliable backup for a dual-link communication mode.

The system proposed in this embodiment includes: the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna; the flying car end communication unit sends communication link data of the flying car to the ground end communication unit through the flying car end antenna; the ground terminal communication unit receives communication link data of the aerocar through the ground terminal omni-directional antenna, and when the current communication scene is detected to meet the preset condition according to the communication link data, the communication link data are switched to the ground terminal high-gain array antenna, and the ground terminal high-gain array antenna is used for communicating with the aerocar terminal communication unit. By the method, short-range and long-range communication links between the ground end and the aerocar are established, short-range reliable communication is realized by adopting the ground end omnidirectional antenna, long-range reliable communication is realized by adopting the ground end high-gain array antenna, a link switching function is provided, and a reliable communication platform is provided for flight safety and measurement and control.

Referring to fig. 4, fig. 4 is a block diagram of a second embodiment of a communication link system according to the present invention.

Based on the first embodiment, in the communication link system of the present embodiment, the ground-side communication unit 10 includes the ground control center 50 and the communication transceiver unit 60, and the communication link data of the flying car includes signal strength;

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

the communication transceiver unit 60 is configured to switch to the ground-side high-gain array antenna according to the switching instruction, and communicate with the aerocar-side communication unit 30 through the ground-side high-gain array antenna.

It should be understood that, if the preset strength threshold is a preset threshold for distinguishing the strength of the signal strength, and if the strength of the signal between the vehicle and the ground is smaller than the preset strength threshold, it is indicated that the strength of the signal between the vehicle and the ground is weaker, then continuing to use the omni-directional antenna at the ground may result in poor communication quality and loss of signal, and the ground control center 50 determines that the vehicle is currently in a remote communication scenario, and sends a switching instruction to the communication transceiver unit 60, so that the communication transceiver unit 60 switches to communicate with the high-gain array antenna at the ground, and thus receives the communication link data from the vehicle through the high-gain array antenna at the ground, or sends a control instruction at the ground to the vehicle. Optionally, the signal strength is assessed synthetically by a plurality of indicators, such as transmission rate, node distance, etc.

Further, the ground-side communication unit 10 further includes a servo system 70, and the communication link data of the flying car further includes azimuth information of the flying car;

the ground control center 50 is further configured to send azimuth information of the flying car to the servo system 70 when the current communication scene meets a preset condition;

the servo system 70 is configured to analyze and calculate antenna pointing information according to the azimuth 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.

When the flying car flies to a long distance or the ground flying car runs to a long distance, the ground control center 50 monitors the signal intensity in real time, determines the communication quality, and autonomously and intelligently controls, sends a command to the communication receiving and sending unit 60, switches to use the ground-end high-gain array antenna, and simultaneously sends the azimuth information of the flying car or the ground flying car to the servo system 70, and the servo system 70 analyzes and calculates the azimuth to which the array antenna needs to be directed, so that the driving motor rotates to drive the ground-end high-gain array antenna to be directed to the flying car or the ground flying car, and the maximum gain beam of the antenna is directed to the flying car, thereby ensuring the high-quality communication effect.

Further, in order to avoid a security problem caused by a system abnormality, the ground control center 50 is further configured to send a manual switching instruction to the communication transceiver unit 60 when receiving the manual switching instruction input by a user, and/or send manual antenna pointing information to the servo system 70 when receiving the manual antenna pointing information input by a user;

the communication transceiver unit 60 is further configured to select a target antenna corresponding to the manual switching instruction from the ground-side omni-directional antenna and the ground-side high-gain array antenna, switch to the target antenna, and communicate with the car-side communication unit 30 through the target antenna;

the servo system 70 is further configured to adjust the pointing direction of the ground-side high-gain array antenna according to the manual antenna pointing information.

It should be understood that the present embodiment provides a manual control manner, so that when an abnormality occurs in the system, the system can be controlled manually, thereby improving the safety of the system. Optionally, the ground control center 50 obtains manual switching instructions and/or manual antenna pointing information transmitted by the public network/regulatory center, or the AP module, from the switch. Optionally, in a certain link of automatic control, if an unresponsive problem occurs in the appointed time, the control system automatically switches to a manual control mode, prompts the user to manually input an instruction, directly switches the antenna running, or directly outputs the antenna azimuth information to the servo system 70.

Referring to fig. 5, fig. 5 is a schematic diagram of a specific control flow of the communication link system of the present invention, first, after the system is started, each module is powered on, the system self-tests, after the self-tests pass, the ground end core communication link and the air and ground aerocar suggest an initial link, enter an automatic control mode, and the ground control center 50 reads the communication link data of the aerocar in real time, including navigation data, flight control data, servo system 70 data, signal intensity data, etc., and comprehensively evaluates the signal intensity by a plurality of indexes: as the distance between the car and the ground increases, the signal strength will be attenuated due to the increase of the distance, and after the communication link is established, the ground control center 50 makes a judgment of the signal strength at intervals: judging whether the signal strength meets the threshold requirement, if so, considering that the signal quality is strong, and controlling the near field communication by using the omnidirectional antenna through an instruction; if the signal strength does not meet the threshold requirement, the signal is considered weak, the signal needs to be enhanced, the high-gain array antenna is started through instruction control, the ground control center 50 acquires the azimuth information of the flying car in real time through a communication link, and the direction information of the antenna, namely the angle information of the antenna needing to rotate, is obtained through calculation of the azimuth information through a computer. The servo system 70 obtains the antenna pointing information, then drives the motor to adjust the antenna pointing to the aerocar, uses the high gain antenna to improve the communication quality, achieves the long distance/ultra long distance communication, and then re-obtains the signal intensity information to enter the next cycle. In a specific implementation, if an unresponsive problem occurs in a certain link of the automatic control, the manual control mode can be switched into immediately, so as to directly select the antenna form or directly output the antenna azimuth information calculated by the control center to the servo system 70.

In the embodiment, the antenna form is switched according to the threshold value judgment result of the signal intensity, and the direction of the antenna is controlled according to the azimuth information of the flying car, so that the maximum gain beam of the antenna is directed to the flying car, the high-quality communication effect is ensured, and a reliable communication platform is provided for flight safety and measurement and control.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a flying car end antenna according to the present invention. The embodiment of the invention also provides a flying car end antenna, which is applied to the communication link system, and comprises:

the radiating unit is of a symmetrical oscillator structure and comprises an upper pole subunit and a lower pole subunit, wherein the upper pole subunit and the lower pole subunit comprise a first rectangular part, a second rectangular part, a frustum part and a middle main body part which are connected with each other;

a fixing structure for fixing the radiation unit to be vertically placed;

the cable assembly comprises an inner core part, an outer conductor part and a communication end, wherein the inner core part is connected with the upper pole subunit, the outer conductor part is connected with the lower pole subunit, and the communication end is connected with the flight communication receiving and transmitting unit.

It should be understood that, referring to fig. 6, the flying car end antenna at least includes a radiating element 1, a fixing structure 2 and a cable assembly 3, where the radiating element 1 is a dipole structure and is divided into an upper pole sub-unit and a lower pole sub-unit, and each pole sub-unit has four different structural designs: the first part and the second part are two pairs of rectangles, the third part is a frustum part, the fourth part is a middle main body part, the four parts are mutually connected, and the dimensional change of each part is used for adjusting bandwidth and optimizing circuit and radiation performance. The fixed structure 2 is used to fix the radiating elements vertically placed so that the antenna achieves good omni-directional performance coverage for vertical polarization. Alternatively, the radiation unit 1 is a PCB planar structure, an all-metal planar structure, a PCB body structure, an all-metal body structure, or the like, which is not limited in this embodiment, and is illustrated in the form of a PCB: the upper and lower pole sub-units guide the circuit to the back surface of the PCB through the metallized through holes, and the welding spots are designed to realize good matching. An inner core and an outer conductor at one end of the cable assembly 3 are respectively connected with a leading welding spot of the upper and lower pole subunits of the PCB at the back surface, and the other end of the cable assembly is connected with an input and output end of the communication receiving and transmitting unit, wherein an inner core part of the cable assembly 3 is connected with the upper pole subunit, and an outer conductor of the cable assembly 3 is connected with the lower pole subunit.

Further, the aerial vehicle end antenna further comprises an antenna housing 4, the beautifying effect and the aerodynamic principle are fully considered for beautifying the structure, visual appreciation and smooth flying are facilitated, the radiating unit 1 is installed in the antenna housing 4 through the fixing structure 2, and the antenna housing 4 is installed at the lower part of the aerial vehicle.

Further, a plurality of pairs of flying car end antennas are installed on the flying car, referring to fig. 7, fig. 7 is a schematic diagram of installation positions of the flying car end antennas, fig. 7 shows an installation mode of two pairs of omni-directional antennas, the two pairs of antennas are located at the lower part of the flying car, and preferably, the interval between the antennas is greater than 400mm, which is beneficial to improving isolation between the antennas.

Optionally, the flying car end antenna is in isomorphic optimization design, and can be used for a flying car data transmission communication system, an image transmission communication system, a remote control communication system, a 4G communication system, a 5G communication system and the like according to the corresponding frequency band.

The embodiment provides a flight vehicle end antenna structure, which provides hardware support for a communication link between a flight vehicle and a ground end, improves communication quality and provides a reliable communication platform for flight safety and measurement and control.

In addition, technical details that are not described in detail in this embodiment may refer to the communication link system provided in any embodiment of the present invention, and are not described herein again.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a ground-end omni-directional antenna according to the present invention. The embodiment of the invention also provides a ground-end omni-directional antenna, which is applied to the communication link system, and comprises:

a plurality of radiation units arranged in an array;

a feed cable for connecting the plurality of radiating elements to a feed network;

and one end of the cable assembly is connected with the main port of the feed network, and the other end of the cable assembly is connected with the communication receiving and transmitting unit.

It should be appreciated that the number of radiating elements may be set according to gain requirements. Referring to fig. 8, description will be given taking three radiation units as examples: the ground-end omnidirectional antenna is of an array structure and comprises three radiating units a, a feed cable b, a feed network c and a cable assembly d, wherein the three radiating units a are longitudinally assembled to achieve a high gain effect, and the radiating units of the ground-end omnidirectional antenna are identical to those of the aerial vehicle-end antenna and are different in installation environment: the flying car end antenna is a radiating element, and the ground end omnidirectional antenna is in an array form of three radiating elements. Specifically, each radiating element a is connected with a feed network c through a feed cable b, the number of output ends of the feed network c is kept consistent with that of the radiating elements a, one end of a cable assembly d is connected with a power division network main port of the feed network c, and the other end of the cable assembly d is connected with a communication receiving and transmitting unit. Further, the ground-end omni-directional antenna further comprises a radome e and a clamping piece f, wherein the number of the radome e can be one, and the radome e can also be consistent with the number of the radiating units a.

The embodiment provides the ground-end omnidirectional antenna, which provides hardware support for a communication link between a flying automobile and the ground end, improves communication quality and provides a reliable communication platform for flying safety and measurement and control.

In addition, technical details that are not described in detail in this embodiment may refer to the communication link system provided in any embodiment of the present invention, and are not described herein again.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a ground-side high-gain array antenna according to the present invention. The embodiment of the invention also provides a ground-end high-gain array antenna, which is applied to the communication link system, and comprises:

and the antenna modules are arranged around the ground-end omni-directional antenna and comprise a plurality of sub-antennas which are arranged in an array manner.

It should be understood that the antenna modules are disposed around the omni-directional antenna at the ground end, and the number of the antenna modules can be set according to practical situations, and in this embodiment, the number of the antenna modules is 3 for explanation: referring to fig. 10, fig. 10 is a schematic view illustrating a position of an antenna module according to the present invention; the antenna modules are three pairs, are respectively responsible for 120-degree areas and realize omnidirectional coverage, and in specific implementation, the three pairs of antenna modules can independently work under the control of a servo system and independently point to an aerial or ground flying car. Referring to fig. 11, fig. 11 is a schematic structural diagram of an antenna module in the present invention, where the antenna module has an array structure and includes a plurality of sub-antennas arranged in an array, and optionally, the array antenna may be designed as a large-scale or super-large-scale antenna array, so as to implement multi-beam tracking communication for more vehicles.

Further, the ground-end 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 perform pitching adjustment under the control of the servo system, so that signal coverage of different angles is realized. Optionally, besides the installation mode of adjustable mechanical pitching, the antenna module can also realize electric scanning beam tracking through the phase shifter, so as to realize signal coverage of different angles.

The embodiment provides a ground-end high-gain array antenna, which provides hardware support for a communication link between a flying automobile and a ground end, improves communication quality and provides a reliable communication platform for flying safety and measurement and control.

In addition, technical details that are not described in detail in this embodiment may refer to the communication link system provided in any embodiment of the present invention, and are not described herein again.

Referring to fig. 12, fig. 12 is a flowchart of a communication control method according to a first embodiment of the present invention.

As shown in fig. 12, the communication control method proposed by the embodiment of the present invention is applied to the communication link system described above, which includes: 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 communication control method comprises the following steps:

step S10: the flying car end communication unit sends communication link data of the flying car to the ground end communication unit through the flying car end antenna;

step S20: the ground terminal communication unit receives the communication link data of the aerocar through the ground terminal omnidirectional antenna, and when the current communication scene is detected to meet the preset condition according to the communication link data, the communication link data are switched to the ground terminal high-gain array antenna, and the ground terminal high-gain array antenna is used for communicating with the aerocar terminal communication unit.

It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.

The system proposed in this embodiment includes: the ground terminal antenna comprises a ground terminal omnidirectional antenna and a ground terminal high-gain array antenna; the flying car end communication unit sends communication link data of the flying car to the ground end communication unit through the flying car end antenna; the ground terminal communication unit receives communication link data of the aerocar through the ground terminal omni-directional antenna, and when the current communication scene is detected to meet the preset condition according to the communication link data, the communication link data are switched to the ground terminal high-gain array antenna, and the ground terminal high-gain array antenna is used for communicating with the aerocar terminal communication unit. By the method, short-range and long-range communication links between the ground end and the aerocar are established, short-range reliable communication is realized by adopting the ground end omnidirectional antenna, long-range reliable communication is realized by adopting the ground end high-gain array antenna, a link switching function is provided, and a reliable communication platform is provided for flight safety and measurement and control.

In one embodiment, the ground-side communication unit comprises a ground control center and a communication transceiver unit, and the communication link data of the flying car comprises signal strength;

the step S20 includes:

the ground control center judges whether the signal intensity is smaller than a preset intensity threshold value, if yes, the ground control center judges that the current communication scene meets preset conditions, and sends a switching instruction to the communication receiving and transmitting unit;

the communication receiving and transmitting unit is switched to the ground end high-gain array antenna according to the switching instruction, and communicates with the flying car end communication unit through the ground end high-gain array antenna.

In an embodiment, the ground-side communication unit further comprises a servo system, and the communication link data of the flying car further comprises azimuth information of the flying car;

after the step S20, the method further includes:

the ground control center sends azimuth information of the flying automobile to the servo system when the current communication scene meets preset conditions;

and the servo system analyzes and calculates antenna pointing information according to the azimuth information of the flying automobile, and controls the ground end high-gain array antenna to point to the flying automobile according to the antenna pointing information.

In an embodiment, the method further comprises:

the ground control center sends the manual switching instruction to the communication receiving and transmitting unit when receiving the manual switching instruction input by a user, and/or sends the manual antenna pointing information to the servo system when receiving the manual antenna pointing information input by the user;

the communication receiving and transmitting unit selects a target antenna corresponding to the manual switching instruction from the ground-end omnidirectional antenna and the ground-end high-gain array antenna, switches to the target antenna and communicates with the aerocar-end communication unit through the target antenna;

and the servo system adjusts the pointing direction of the ground-end high-gain array antenna according to the manual antenna pointing information.

In an embodiment, the flying car end communication unit is provided with an uplink and a downlink, the flying car end communication unit comprising: the device comprises a flight control unit, a flight communication receiving and transmitting unit and a plurality of executing mechanisms;

the method further comprises the steps of:

in the downlink, the flying car end antenna receives a ground end signal, the ground end signal is sent to the flying control unit through the flying communication receiving and transmitting unit, the flying control unit analyzes the ground end signal, determines execution information and a target executing mechanism corresponding to the ground end signal, and sends the execution information to the target executing mechanism;

In the uplink, the flight control unit acquires current execution signals of the execution mechanisms, and sends the current execution signals to the flying car end antenna through the flight communication receiving and transmitting unit so as to send the current execution signals through the flying car end antenna.

In an embodiment, the flying car end communication unit includes an air flying car end communication unit and a ground flying car end communication unit; the ground terminal communication unit, the aerial vehicle terminal communication unit and any two communication units among the ground vehicle terminal communication unit are provided with communication links.

It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.

In addition, technical details that are not described in detail in this embodiment may refer to the communication link system provided in any embodiment of the present invention, and are not described herein again.

Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A communication link system, the communication link system comprising: 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 end communication unit is used for sending communication link data of the flying car to the ground end communication unit through the flying car end antenna;

the ground terminal communication unit is used for receiving the communication link data of the aerocar through the ground terminal omnidirectional antenna, switching to the ground terminal high-gain array antenna when the current communication scene is detected to meet the preset condition according to the communication link data, and communicating with the aerocar terminal communication unit through the ground terminal high-gain array antenna.

2. The communication link system of claim 1, wherein the ground-side communication unit comprises a ground control center and a communication transceiver unit, and wherein the communication link data of the flying vehicle comprises signal strength;

the ground control center is used for judging whether the signal intensity is smaller than a preset intensity threshold value, if yes, judging that the current communication scene meets preset conditions, and sending a switching instruction to the communication receiving and transmitting unit;

The communication receiving and transmitting unit is used for switching to the ground end high-gain array antenna according to the switching instruction, and communicating with the flying car end communication unit through the ground end high-gain array antenna.

3. The communication link system of claim 2, wherein the ground-side communication unit further comprises a servo system, and wherein the communication link data of the flying car further comprises azimuth information of the flying car;

the ground control center is further used for sending azimuth information of the flying automobile to the servo system when the current communication scene meets preset conditions;

the servo system is used for analyzing and calculating antenna pointing information according to the azimuth information of the flying automobile and controlling the ground-end high-gain array antenna to point to the flying automobile according to the antenna pointing information.

4. The communication link system according to claim 3, wherein the ground control center is further configured to send a manual switching instruction to the communication transceiver unit when receiving the manual switching instruction input by a user, and/or send manual antenna pointing information to the servo system when receiving the manual antenna pointing information input by a user;

The communication transceiver unit is further configured to select a target antenna corresponding to the manual switching instruction from the ground-side omni-directional antenna and the ground-side high-gain array antenna, switch the target antenna to the target antenna, and communicate with the aerocar-side communication unit through the target antenna;

the servo system is also used for adjusting the pointing direction of the ground-end high-gain array antenna according to the manual antenna pointing information.

5. The communication link system of claim 1, wherein the flying car end communication unit is provided with an uplink and a downlink, the flying car end communication unit comprising: the device comprises a flight control unit, a flight communication receiving and transmitting unit and a plurality of executing mechanisms;

in the downlink, the flying car end antenna receives a ground end signal, the ground end signal is sent to the flying control unit through the flying communication receiving and transmitting unit, the flying control unit analyzes the ground end signal, determines execution information and a target executing mechanism corresponding to the ground end signal, and sends the execution information to the target executing mechanism;

in the uplink, the flight control unit acquires current execution signals of the execution mechanisms, and sends the current execution signals to the flying car end antenna through the flight communication receiving and transmitting unit so as to send the current execution signals through the flying car end antenna.

6. The communication link system of claim 1, wherein the flying car end communication units include an air flying car end communication unit and a ground flying car end communication unit; the ground terminal communication unit, the aerial vehicle terminal communication unit and any two communication units among the ground vehicle terminal communication unit are provided with communication links.

7. A flying car end antenna for use in a communication link system as claimed in any one of claims 1 to 6, said flying car end antenna comprising:

the radiating unit is of a symmetrical oscillator structure and comprises an upper pole subunit and a lower pole subunit, wherein the upper pole subunit and the lower pole subunit comprise a first rectangular part, a second rectangular part, a frustum part and a middle main body part which are connected with each other;

a fixing structure for fixing the radiation unit to be vertically placed;

the cable assembly comprises an inner core part, an outer conductor part and a communication end, wherein the inner core part is connected with the upper pole subunit, the outer conductor part is connected with the lower pole subunit, and the communication end is connected with the flight communication receiving and transmitting unit.

8. A ground-side omni-directional antenna for use in a communication link system according to any of claims 1-6, comprising:

a plurality of radiation units arranged in an array;

a feed cable for connecting the plurality of radiating elements to a feed network;

and one end of the cable assembly is connected with the main port of the feed network, and the other end of the cable assembly is connected with the communication receiving and transmitting unit.

9. A ground-side high-gain array antenna for use in a communication link system according to any one of claims 1-6, comprising:

and the antenna modules are arranged around the ground-end omni-directional antenna and comprise a plurality of sub-antennas which are arranged in an array manner.

10. A communication control method, characterized in that the communication control method is applied to the communication link system according to any one of claims 1 to 6, the communication link system comprising: 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 communication control method comprises the following steps:

the flying car end communication unit sends communication link data of the flying car to the ground end communication unit through the flying car end antenna;

the ground terminal communication unit receives the communication link data of the aerocar through the ground terminal omnidirectional antenna, and when the current communication scene is detected to meet the preset condition according to the communication link data, the communication link data are switched to the ground terminal high-gain array antenna, and the ground terminal high-gain array antenna is used for communicating with the aerocar terminal communication unit.

Images