CN109993955B - General aviation flight data wireless transmission equipment based on G1000 system - Google Patents
General aviation flight data wireless transmission equipment based on G1000 system Download PDFInfo
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- CN109993955B CN109993955B CN201910239001.4A CN201910239001A CN109993955B CN 109993955 B CN109993955 B CN 109993955B CN 201910239001 A CN201910239001 A CN 201910239001A CN 109993955 B CN109993955 B CN 109993955B
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0435—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
- H04L9/0631—Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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- Aviation & Aerospace Engineering (AREA)
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Abstract
The invention relates to a general aviation flight data wireless transmission device, which comprises a terminal and a ground server, wherein the terminal is installed in an aircraft, the terminal comprises a G1000 system, a processor, a program storage module, a wireless data transceiver module, a second external storage module and a program which is stored in the program storage module and executed by the processor, a first external storage module is arranged in the G1000 system, and the processor executes the program to realize the following steps: synchronizing the flight data in the first external storage module to the second external storage module through a data interface; and the flight data stored in the second external storage module is compressed and encrypted, and is sent to a ground server through a wireless data transceiver module, and is decompressed and decrypted by a ground service station to obtain the flight data. Compared with the prior art, the invention realizes the wireless transmission of flight data by using the G1000 system by arranging the second external storage module.
Description
Technical Field
The invention relates to the field of aviation data transmission, in particular to general aviation flight data wireless transmission equipment based on a G1000 system.
Background
At present, the most widely used application of the flight data acquisition and storage of the navigation aircraft is a G1000(GARMIN G1000) system, and the G1000 acquires the flight data in a flight task and stores the acquired flight data in an SD card carried by the G1000. Generally, the ground data management center mainly copies the contents of the SD card periodically to acquire flight data thereof by aircrafts, and cannot realize immediate and effective transmission of the data to a ground station, which is inconvenient for the ground station to monitor the state of the airplane.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a general aviation flight data wireless transmission device based on a G1000 system.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a general aviation flight data wireless transmission equipment, includes terminal and ground server, the terminal is installed in the aircraft, the terminal includes G1000 system, treater, program storage module, wireless data transceiver module and second outer memory module, and store in the program storage module and by the program that the treater was executed, be equipped with first outer memory module in the G1000 system, the treater realizes following step when executing the program:
synchronizing the flight data in the first external storage module to the second external storage module through a data interface;
and the flight data stored in the second external storage module is compressed and encrypted, and is sent to a ground server through a wireless data transceiver module, and is decompressed and decrypted by a ground service station to obtain the flight data.
The G1000 system collects and records flight data once per second, and the flight data comprises navigation data and engine state parameters.
The first external storage module and the second external storage module are both SD card modules.
The encryption mode is AES-128bits symmetric encryption.
The process of sending through the wireless data transceiver module is specifically to send data in a TCP/IP protocol socket packet form.
The terminal also comprises a power supply module for supplying power to each module.
Compared with the prior art, the invention has the following beneficial effects:
1) by setting the second external storage module, the flight data stored in the first external storage module in the G1000 system can be synchronized, and the subsequent application layer directly processes the flight data based on the flight data stored in the second external storage module, so that the wireless transmission of the flight data by using the G1000 system is realized.
2) By using the AES-128bits symmetric encryption mode, the characteristics of the navigation aircraft flight data acquired and stored by the G1000 system, the data encryption time and the algorithm safety can be considered.
3) The flight quality monitoring aims to analyze and detect an overrun event in the flight process by utilizing flight data, monitor the health problems of an airplane and an engine, and timely adopt an effective maintenance scheme to remove potential safety hazards so as to improve the reliability of the airplane, the flight data is the basis of the flight quality monitoring, and the data is timely and effectively acquired through wireless data transmission to provide data support for development and application of the flight quality monitoring.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a schematic diagram of the overall scheme of the wireless transmission platform.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The utility model provides a general aviation flight data wireless transmission equipment, includes terminal and ground server, and the terminal mounting is in the aircraft, and the terminal includes G1000 system, treater, program storage module, wireless data transceiver module and the outer storage module of second to and save in the program storage module and by the program that the treater was carried out, be equipped with first outer storage module in the G1000 system, realize following step when the treater carries out the program:
synchronizing the flight data in the first external storage module to the second external storage module through a data interface;
and the flight data stored in the second external storage module is compressed and encrypted, and is sent to a ground server through a wireless data transceiver module, and is decompressed and decrypted by a ground service station to obtain the flight data.
The G1000 system collects and records flight data once per second, and the flight data comprises navigation data and engine state parameters.
The first external storage module and the second external storage module are both SD card modules.
The encryption mode is AES-128bits symmetric encryption.
The data is transmitted in a TCP/IP protocol socket packet mode through the process of transmitting by the wireless data transceiver module.
The terminal also comprises a power supply module for supplying power to each module.
Specifically, in order to meet the requirement that G1000 flight data is transmitted to a ground data center instantly and effectively, the following steps are provided:
A) g1000 collects the flight data in the flight mission and stores the flight data in the SD card of the G1000.
B) And the flight data in the flight process is transferred to the external SD card through the SD card transfer interface, and the terminal software part reads the data of the external SD card.
C) And the terminal software part compresses and encrypts the data and transmits the processed ciphertext to the ground data management center in a wireless mode.
D) And the receiving end of the ground server receives the ciphertext, decompresses and decrypts the ciphertext to obtain plaintext data.
A general aviation flight data wireless transmission platform based on a G1000 system is composed of a terminal, a WiFi router and a ground server.
The G1000 system collects and records flight data once per second. The acquired navigation data and the engine parameters are displayed to flight personnel through two or three displays of the aircraft cockpit to serve as flight reference on one hand, and are stored into an SD card (namely a first external storage module) carried by the flight personnel through a data recording function on the other hand.
The general aviation flight data wireless transmission platform based on the G1000 system is divided into a terminal and a server end, the terminal is composed of a hardware system and application software, the hardware is crosslinked with the G1000, and the software is installed on a server or a computer of a ground data center to achieve acquisition, processing and sending of flight data.
The terminal hardware realization and the G1000 SD card cross-linking are realized through an SD card switching interface. The SD card switching interface is used for solving the problem of flight data acquisition ways, expanding the SD card to the outside of G1000, and facilitating the terminal to be connected with the SD card to operate flight data.
In the process of processing flight data by terminal software, encryption provides guarantee for flight data transmission safety, namely, the terminal converts plaintext data into ciphertext through an encryption algorithm, the ciphertext is transmitted, and the server receives the ciphertext and then analyzes the ciphertext into plaintext data. The characteristics of the flight data of the navigation aircraft collected and stored by the G1000 system, the data encryption time and the algorithm safety are considered, and AES-128bits symmetric encryption is adopted in design. The structure of the AES algorithm is as follows:
the encryption algorithm inputs a 128-bit (16-byte) plaintext sequence, 4 bytes are grouped into rows to form a 4x 4-byte matrix called a state matrix, the content of the state matrix is changed after each operation, and the content of the state matrix outputs a 128-bit ciphertext sequence in sequence after the last round is finished. Similarly, the 128-bit key is divided into a 4x 4-byte square matrix, 4 bytes in each row are called a word, 4 words of the initial key are expanded by the key to form 44 words, and 4 words (4x4 matrix) are taken for each round to perform key addition operation with the state matrix. Except for the preparation round and the last round, the encryption processes of the other rounds comprise S box replacement, row shifting, column mixing and 4 transformation steps of adding a key.
In the transmission method for the wireless transmission of the flight data, the data is sent in a TCP/IP protocol socket packet form after the data is acquired, compressed and encrypted. The terminal sends out a connection request, the server side monitors and responds to the request, and data transmission is carried out after handshaking between the two sides.
The ground station server monitors the IP and the port number of the local machine, responds to the connection request, receives flight data, and realizes the functions of data receiving, receiving process display, storage, file library updating and statistics. The file receiving and processing process is carried out step by step, namely, the file is decompressed and decrypted after the data file is received, so that the data receiving time is shortened.
The general aviation flight data wireless transmission platform has the following beneficial effects: the flight quality monitoring aims to analyze and detect an overrun event in the flight process by utilizing flight data, monitor the health problems of the airplane and an engine, and timely adopt an effective maintenance scheme to remove potential safety hazards so as to improve the reliability of the airplane. The flight data is the basis of flight quality monitoring, and the real-time and effective acquisition of data wireless transmission provides data support for the development and application of the flight quality monitoring.
As shown in fig. 1, the working process of the general aviation flight data wireless transmission device comprises the following steps:
step S1 shows that G1000 collects the flight data in the flight mission, stores the flight data in the SD card, and transfers the flight data in the flight process to the external SD card through the SD card transfer interface, and the terminal software part reads the external SD card data. The G1000 system collects and records flight data once per second. The acquired navigation data and the engine parameters are presented to flight personnel for flight reference through two or three displays of the aircraft cockpit on one hand, and are stored into an SD card carried by the flight personnel by a data recording function on the other hand. The general aviation flight data wireless transmission platform based on the G1000 system is divided into a terminal and a server end, the terminal is composed of a hardware system and application software, and the hardware implementation and the G1000 SD card are realized through an SD card switching interface. The SD card switching interface is used for solving the problem of flight data acquisition ways, expanding the SD card to the outside of G1000, and facilitating the terminal to be connected with the SD card to operate flight data.
Step S2 represents that the terminal software section performs compression processing on the data. The invention adopts the LZW algorithm to perform lossless compression on data.
Step S3 represents that the terminal software section performs encryption processing on the data. In consideration of the characteristics of the flight data of the navigation aircraft acquired and stored by the G1000 system, the data encryption time and the algorithm safety, the invention adopts AES-128bits symmetric encryption.
Step S4 represents that the terminal software part transmits the processed cipher text to the ground data management center in a wireless manner. And after the data acquisition, compression and encryption are finished, sending the data in a TCP/IP protocol socket packet form.
Step S5 shows that the terminal sends out a connection request, the server monitors the IP and port number of the local device, responds to the connection request, receives flight data, and implements the functions of data reception, display and storage of the reception process, and update and statistics of the file library.
Step S6 represents that the ground server receiving end performs a decryption algorithm on the received data.
Step S7 represents that the ground server receiving end performs decompression algorithm on the received data.
In the invention, the general scheme design of the wireless transmission equipment is shown as figure 2, the general aviation flight data wireless transmission equipment based on the G1000 system is divided into two parts, namely a terminal and a server end, the terminal consists of two parts, namely a hardware system and application software, the hardware implementation is crosslinked with the G1000, and the software is installed on a server or a computer of a ground data center to realize the acquisition, processing and sending of flight data.
Claims (4)
1. The utility model provides a general aviation flight data wireless transmission equipment, includes terminal and ground server, the terminal is installed in the aircraft, its characterized in that, the terminal includes G1000 system, treater, program storage module, wireless data transceiver module and the outer storage module of second, and save in the program storage module and by the procedure that the treater was carried out, be equipped with first outer storage module in the G1000 system, the treater carries out when the procedure realize following step:
synchronizing the flight data in the first external memory module to the second external memory module through the data interface,
the flight data stored in the second external storage module is compressed and encrypted, and is sent to a ground server through a wireless data transceiver module, and the ground server decompresses and decrypts the data to obtain the flight data;
the G1000 system collects and records flight data once per second, wherein the flight data comprises navigation data and engine state parameters;
the first external storage module and the second external storage module are both SD card modules;
the second external storage module is arranged, the flight data stored in the first external storage module in the G1000 system is synchronized, and the subsequent application layer is directly processed based on the flight data stored in the second external storage module, so that the wireless transmission of the flight data is realized by using the G1000 system.
2. The universal aviation flight data wireless transmission device according to claim 1, wherein the encryption is AES-128bits symmetric encryption.
3. The general aviation flight data wireless transmission device according to claim 1, wherein the process of sending through the wireless data transceiver module is to send data specifically in the form of TCP/IP protocol socket packets.
4. The wireless generic aviation flight data transmission device of claim 1, wherein the terminal further comprises a power module for powering the modules.
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| CN201910239001.4A CN109993955B (en) | 2019-03-27 | 2019-03-27 | General aviation flight data wireless transmission equipment based on G1000 system |
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