CN112351410A - Be applied to three networks of general aircraft and merge transmission device - Google Patents
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- CN112351410A CN112351410A CN202011229496.1A CN202011229496A CN112351410A CN 112351410 A CN112351410 A CN 112351410A CN 202011229496 A CN202011229496 A CN 202011229496A CN 112351410 A CN112351410 A CN 112351410A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
Abstract
The invention discloses a three-network fusion transmission device applied to a general airplane, which comprises an airborne part and a ground part, wherein the airborne part transmits onboard information to the ground part in real time, the airborne part comprises an airborne communication unit, a public network and private network fusion antenna and a Beidou antenna, the airborne communication unit is used for classifying collected data according to importance degree, the collected data are divided into key data and general data, the key data are transmitted to the ground in the form of short messages through the Beidou antenna, the general data are converted into radio frequency signals, and a public network 4G link or a private network 4G link is selected to be transmitted to the ground part through a set frequency band by the public network and private network fusion antenna according to the signal coverage strength. The invention can fully cover the flying airspace of the general airplane and transmit the onboard information to the ground in real time on the premise of meeting the flying speed of the general airplane, so that the ground can master the real-time state information of the general airplane.
Description
Technical Field
The invention belongs to the field of real-time state monitoring and health management of a general airplane, and particularly relates to a three-network integration transmission device applied to the general airplane.
Background
At present, the ground-air data transmission mode mainly comprises ADS-B (automatic dependent surveillance broadcast), a satellite communication system and the like, the ADS-B relies on a global navigation satellite system to position the airplane, the ADS-B does not have a function of verifying the target position, and if the position information given by the airplane is wrong, the ground cannot be distinguished. Satellite communication systems mainly provide three major directions of service to users: positioning service, short message communication service and time service. However, the communication cost of the satellite bandwidth is much higher than that of the 4G transmission method, and the satellite bandwidth is far from meeting the data transmission bandwidth requirement. In the process of being generally applied, the 4G network has the problem that signals cannot be disconnected in a region where users are concentrated.
Under above background, the data importance degree classification is proposed, thereby real-time state information on the general aircraft is transmitted to the ground in real time by adopting the modes of a Beidou transmission link, a public network transmission link and a private network transmission link respectively, thereby the management of the civil general aircraft is ensured, the data transmitted to the ground can be processed in time, fault hidden dangers are discovered, thereby a quick and accurate maintenance scheme is provided for the general aircraft, the maintenance efficiency of the aircraft is improved, the occurrence rate and the maintenance cost of accidents are reduced, thereby the maintenance efficiency is improved, and the work burden of maintenance personnel is reduced.
Disclosure of Invention
The invention aims to provide a three-network integration transmission device applied to a general airplane, which transmits monitored data to the ground in real time by installing corresponding equipment on the airplane and on the ground, so that the ground can master the state information of the airplane in real time.
The invention aims to be realized by the following technical scheme:
a three-network integration transmission device applied to a general airplane comprises an airborne part and a ground part, wherein the airborne part transmits onboard information to the ground part in real time;
the airborne part comprises an airborne communication unit, a public network and private network fusion antenna and a Beidou antenna;
the airborne communication unit is used for classifying the acquired data according to importance degree, dividing the data into key data and general data, transmitting the key data to the ground through the Beidou antenna in a short message mode, converting the general data into radio frequency signals, and selecting a public network 4G link or a private network 4G link to be transmitted to the ground part through a set frequency band by the public network and private network fusion antenna according to the signal coverage strength.
Preferably, the on-board communication unit comprises a main control board and an RF/PA module;
the main control board comprises a main control exchange module, a private network 4G module, a public network 4G module and an airborne Beidou/GPS module;
the main control exchange module judges the type of all the data received by the network port, classifies all the received data into key data and general data; judging according to the network coverage condition of the position of the airplane, and sending the general data to the public network 4G module under the condition of good public network coverage condition, otherwise sending the general data to the private network 4G module; transmitting the key data to an airborne Beidou/GPS module;
the private network 4G module is used for converting the received general data into a radio frequency signal used by a private network and transmitting the radio frequency signal to the RF/PA module;
the RF/PA module is used for amplifying the radio frequency signal and then transmitting the radio frequency signal to the ground part through the public network and private network fusion antenna;
the public network 4G module is used for converting the received general data into radio frequency signals used by a public network and then transmitting the radio frequency signals to the ground part through a public network and private network fusion antenna;
the Beidou/GPS module is used for receiving the key data distributed by the main control exchange module to form a short message, then sending the short message to a Beidou satellite through a Beidou antenna, and finally sending the data to the ground part through the Beidou satellite.
Further, the airborne communication unit also comprises a power module and an airborne EMI filtering module;
the airborne EMI filtering module is used for suppressing noise interference in a power supply circuit;
the power supply module is used for converting +28V of an onboard power supply into +5V, +12V, +24V required by the private network 4G module, the public network 4G module, the Beidou/GPS module and the main control module.
Preferably, the ground part comprises a ground communication unit, a ground receiving antenna and a Beidou receiver;
the ground communication unit receives radio frequency signals transmitted by a public network 4G link and a private network 4G link through a ground receiving antenna, respectively performs power amplification, frequency conversion, filtering, A/D conversion, demodulation and decoding on the radio frequency signals transmitted by the two links, and extracts general data transmitted by an airborne part through a public network and private network fusion antenna; receiving key data sent by an airborne part in a short message form through a Beidou receiver; and fusing the general data and the key data and then sending the fused data to the back-end equipment through the network port.
Preferably, the ground communication unit comprises a radio frequency processing unit, a baseband processing unit, a controller, a data processor and a ground Beidou/GPS module;
the radio frequency processing unit converts the baseband signal into a radio frequency signal after modulation, up-conversion, filtering and amplification; converting a radio frequency signal received by a ground receiving antenna into a baseband signal after multistage amplification, filtering, down-conversion and demodulation;
the ground baseband processing unit processes the original data into baseband signals after coding, multiplexing, modulating and spreading, and sends the baseband signals to the radio frequency processing unit; the baseband signal converted by the radio frequency processing unit is de-spread, demodulated and decoded to be analyzed into original general data;
the ground Beidou/GPS module is used for analyzing the short message into original key data;
the controller is used for controlling the receiving of the ground receiving antenna and realizing the receiving of the radio frequency signals on the private network 4G link and the public network 4G link;
and the data processor fuses the key data and the general data analyzed by the ground Beidou/GPS module and the baseband processing unit according to the requirements of data formats.
Furthermore, the ground communication unit also comprises a ground EMI filtering module and a ground power supply module;
the ground EMI filtering module is used for suppressing noise interference in a power supply circuit and a control signal circuit;
the ground power supply module is used for converting 220V alternating current into direct current voltages +5V, +12V, +24V required by corresponding modules.
The invention has the beneficial effects that: the requirement of large bandwidth is met, the flying airspace of the general airplane can be fully covered through the design and the stationing of the ground communication unit, and the onboard information is transmitted to the ground in real time on the premise of meeting the flying speed of the general airplane, so that the real-time state information of the general airplane is mastered on the ground.
Drawings
Fig. 1 is a block diagram of a three-network convergence transmission device applied to a general-purpose aircraft.
Fig. 2 is a schematic structural diagram of an airborne communication unit.
Fig. 3 is a schematic structural diagram of a terrestrial communication unit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the tri-network convergence transmission device applied to the general-purpose aircraft according to the embodiment includes an airborne part and a ground part, and the airborne part transmits onboard information to the ground part in real time.
The airborne part comprises an airborne communication unit, a public network and private network fusion antenna and a Beidou antenna.
The airborne communication unit classifies the acquired data according to importance degree, the data is divided into key data and general data, the key data is transmitted to the ground through the Beidou antenna in a short message mode, the general data is converted into radio frequency signals, and according to the signal coverage strength, a public network 4G link or a private network 4G link is selected and transmitted to the ground part through a set frequency band (determined on the premise of not interfering the rest frequency bands of the airplane) by the public network and private network fusion antenna.
As shown in fig. 2, the on-board communication unit includes a power supply module, an on-board EMI filter module, a main control board, an RF/PA module, and the like.
The main control board comprises a main control exchange module, a private network 4G module, a public network 4G module and an airborne Beidou/GPS module.
The main control exchange module judges the type of all the data received by the network port, classifies all the received data into key data and general data; the method comprises the steps that judgment is carried out according to the network coverage condition of the position of an airplane, general data are sent to a public network 4G module under the condition that the coverage condition of a near-ground public network is good, and the general data are sent to a private network 4G module under the condition of high altitude because the public network coverage cannot be achieved; and key data can be transmitted to the airborne Beidou/GPS module at any time so as to master the key data of the airplane in real time.
The private network 4G module mainly realizes the instruction of the master control exchange module, converts the received general data into the radio frequency signal used by the private network and transmits the radio frequency signal to the RF/PA module when receiving the sending instruction.
The multi-support network system of the private network 4G module comprises GPRS, EDGE, WCDMA, HSPA +, DC-HSPA +, TD-HSPA, TD-SCDMA, LTE FDD and LTE TDD, and the frequency bands supported by the systems are as follows:
FDD LTE：Band 1，Band 3，Band 8；
TDD LTE：Band 38，Band 39，Band 40，Band 41；
DC-HSPA+/HSPA+/HSPA/WCDMA：Band 1，Band 5，Band 8，Band 9；TD-SCDMA：Band 34，Band 39；
GSM/GPRS/EDGE：1800MHz/900MHz。
the RF/PA module is connected with the private network 4G module through a radio frequency line and a control line. The RF/PA module is mainly used for amplifying the radio frequency signal according to the setting and then sending the radio frequency signal to the ground part through the public network and private network fusion antenna.
The public network 4G module mainly realizes the instruction of the master control exchange module, converts received general data into radio frequency signals used by a public network when receiving the sending instruction, and sends the radio frequency signals to the ground part through the public network and private network fusion antenna, wherein the frequency band signal output range is (1430-1470) MHz, and the frequency band signal output range supports multi-bandwidth and the highest bandwidth output of 20 MHz.
The Beidou/GPS module mainly realizes Beidou communication, receives key data distributed by the master control exchange module to form a short message, and then sends the short message to a Beidou satellite through a Beidou antenna, and finally sends the data to a ground part through the Beidou satellite.
The airborne EMI filtering module is used for suppressing noise interference in the power supply circuit.
The power supply module is used for converting +28V of an onboard power supply into +5V, +12V, +24V required by the private network 4G module, the public network 4G module, the Beidou/GPS module and the main control module.
The ground part comprises a ground communication unit, a ground receiving antenna and a Beidou receiver.
The ground communication unit fuses data transmission of two networks of a part of airborne public network and private network, can receive radio frequency signals transmitted by a public network 4G link and a private network 4G link through a ground receiving antenna, respectively performs operations such as power amplification, frequency conversion, filtering, A/D conversion, demodulation, decoding and the like on the radio frequency signals transmitted by the two links, and extracts general data sent by the airborne communication unit through a public network and private network fusion antenna; receiving key data sent by an airborne communication unit in a short message form through a Beidou receiver; and fusing the general data and the key data and then sending the fused data to the back-end equipment through the network port.
As shown in fig. 3, the ground communication unit includes a radio frequency processing unit, a baseband processing unit, a controller, a data processor, a ground beidou/GPS module, a ground EMI filtering module, a ground power module, and the like.
And the ground EMI filtering module is used for inhibiting noise interference in a power supply circuit and a control signal circuit.
And the ground power supply module converts 220V alternating current into +5V, +12V, +24V required by the corresponding module.
The radio frequency processing unit mainly realizes the processing and conversion between the baseband signal and the radio frequency signal. The baseband signals are modulated, up-converted, filtered, amplified and the like by a radio frequency processing unit to be converted into radio frequency signals; radio frequency signals received by a ground receiving antenna are converted into baseband signals through processing of multi-stage amplification and filtering, down-conversion, demodulation and the like.
The ground baseband processing unit mainly realizes the baseband processing function, the signaling processing function, the local and remote operation maintenance functions of signals, and the working state monitoring and alarm information reporting functions of the base station system. The original data is processed into baseband signals through coding, multiplexing, modulation, spread spectrum and the like and is sent to a radio frequency processing unit; the baseband signal converted by the radio frequency processing unit is processed by de-spreading, demodulation, decoding and the like, and is analyzed into original general data.
The ground Beidou/GPS module mainly receives short messages transmitted by the Beidou satellite through a Beidou link and converts the short messages into original key data according to the requirement of a data format.
The controller mainly realizes the receiving control of the ground receiving antenna and the receiving of the radio frequency signals on the private network 4G link and the public network 4G link.
The data processor realizes the processing and fusion of the Beidou information and the private network and public network information. And receiving the key data and the general data analyzed by the ground Beidou/GPS module and the baseband processing unit, and fusing according to the requirement of a data format.
The ground receiving antenna mainly achieves the function of receiving signals sent by the public network and private network converged antenna.
The Beidou receiver mainly completes the receiving function of the satellite signals of the Beidou system.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (6)
1. The utility model provides a be applied to three networks of general aircraft and merge transmission device, includes airborne part and ground part, and airborne part is real-time with onboard information transfer to ground part, its characterized in that:
the airborne part comprises an airborne communication unit, a public network and private network fusion antenna and a Beidou antenna;
the airborne communication unit is used for classifying the acquired data according to importance degree, dividing the data into key data and general data, transmitting the key data to the ground through the Beidou antenna in a short message mode, converting the general data into radio frequency signals, and selecting a public network 4G link or a private network 4G link to be transmitted to the ground part through a set frequency band by the public network and private network fusion antenna according to the signal coverage strength.
2. The tri-network convergence transmission device applied to the general-purpose aircraft according to claim 1, wherein: the airborne communication unit comprises a main control board and an RF/PA module;
the main control board comprises a main control exchange module, a private network 4G module, a public network 4G module and an airborne Beidou/GPS module;
the main control exchange module judges the type of all the data received by the network port, classifies all the received data into key data and general data; judging according to the network coverage condition of the position of the airplane, and sending the general data to the public network 4G module under the condition of good public network coverage condition, otherwise sending the general data to the private network 4G module; transmitting the key data to an airborne Beidou/GPS module;
the private network 4G module is used for converting the received general data into a radio frequency signal used by a private network and transmitting the radio frequency signal to the RF/PA module;
the RF/PA module is used for amplifying the radio frequency signal and then transmitting the radio frequency signal to the ground part through the public network and private network fusion antenna;
the public network 4G module is used for converting the received general data into radio frequency signals used by a public network and then transmitting the radio frequency signals to the ground part through a public network and private network fusion antenna;
the Beidou/GPS module is used for receiving the key data distributed by the main control exchange module to form a short message, then sending the short message to a Beidou satellite through a Beidou antenna, and finally sending the data to the ground part through the Beidou satellite.
3. The tri-network convergence transmission device applied to the general-purpose aircraft according to claim 2, wherein: the airborne communication unit also comprises a power module and an airborne EMI filtering module;
the airborne EMI filtering module is used for suppressing noise interference in a power supply circuit;
the power supply module is used for converting +28V of an onboard power supply into +5V, +12V, +24V required by the private network 4G module, the public network 4G module, the Beidou/GPS module and the main control module.
4. The tri-network convergence transmission device applied to the general-purpose aircraft according to claim 1, wherein: the ground part comprises a ground communication unit, a ground receiving antenna and a Beidou receiver;
the ground communication unit receives radio frequency signals transmitted by a public network 4G link and a private network 4G link through a ground receiving antenna, respectively performs power amplification, frequency conversion, filtering, A/D conversion, demodulation and decoding on the radio frequency signals transmitted by the two links, and extracts general data transmitted by an airborne part through a public network and private network fusion antenna; receiving key data sent by an airborne part in a short message form through a Beidou receiver; and fusing the general data and the key data and then sending the fused data to the back-end equipment through the network port.
5. The tri-network convergence transmission device applied to the general-purpose aircraft according to claim 4, wherein: the ground communication unit comprises a radio frequency processing unit, a baseband processing unit, a controller, a data processor and a ground Beidou/GPS module;
the radio frequency processing unit converts the baseband signal into a radio frequency signal after modulation, up-conversion, filtering and amplification; converting a radio frequency signal received by a ground receiving antenna into a baseband signal after multistage amplification, filtering, down-conversion and demodulation;
the ground baseband processing unit processes the original data into baseband signals after coding, multiplexing, modulating and spreading, and sends the baseband signals to the radio frequency processing unit; the baseband signal converted by the radio frequency processing unit is de-spread, demodulated and decoded to be analyzed into original general data;
the ground Beidou/GPS module is used for analyzing the short message into original key data;
the controller is used for controlling the receiving of the ground receiving antenna and realizing the receiving of the radio frequency signals on the private network 4G link and the public network 4G link;
and the data processor fuses the key data and the general data analyzed by the ground Beidou/GPS module and the baseband processing unit according to the requirements of data formats.
6. The tri-network convergence transmission device applied to the general-purpose aircraft according to claim 5, wherein: the ground communication unit also comprises a ground EMI filtering module and a ground power supply module;
the ground EMI filtering module is used for suppressing noise interference in a power supply circuit and a control signal circuit;
the ground power supply module is used for converting 220V alternating current into direct current voltages +5V, +12V, +24V required by corresponding modules.
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| CN113938182A (en) * | 2021-10-14 | 2022-01-14 | 北京航空航天大学 | Navigation platform airborne module based on multi-network integration |
| CN115175160A (en) * | 2022-09-05 | 2022-10-11 | 江西立盾光电科技有限公司 | Emergency communication system with ranging function based on Beidou positioning |
| CN115801092A (en) * | 2022-10-13 | 2023-03-14 | 中国航空工业集团公司洛阳电光设备研究所 | Airborne communication nacelle for training |
| CN115801092B (en) * | 2022-10-13 | 2024-04-30 | 中国航空工业集团公司洛阳电光设备研究所 | Onboard communication nacelle for training |
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Application publication date: 20210209 |