General data format conversion method and system for network data transmission of airborne equipment

Abstract

The invention discloses a general data format conversion method and a general data format conversion system for network data transmission of airborne equipment. The general data format conversion method comprises the following steps of: 1) according to the type of source data to be converted, defining the data structure type description of the source data; 2) stating the variables of source data type description, and initializing and assigning the variables of the source data type description; 3) defining a target data storage buffer area; 4) according to data format conversion rules, resolving the variables of the source data type description; and 5) converting the source data according to the resolved data type and storing the conversion results in the target data storage buffer area. The general data format conversion method and the general data format conversion system for network data transmission of airborne equipment have the advantages that the unification of various different network data format conversion processing methods which exist at present is realized, the work of designers at the period of network interface protocol and program design is simplified, the efficiency of data transmission among aviation airborne equipment is improved and the risk of erroneous data transmission among the airborne equipment is reduced.

Description

technical field [0001] The present invention relates to civil aircraft avionics systems in the field of aviation, in particular to a data format conversion method and system for universal data transmission of airborne equipment network, the method and system are applicable to flight management systems, automatic control systems, integrated display systems, etc. Data transfer, loading and network communication between various avionics systems. Background technique [0002] Mutual data transmission is inseparable between civil aircraft avionics systems. Due to the differences in the computer architecture of the on-board electronic systems, there will be errors in the direct data transmission between the electronic systems. In order to ensure the correct data transmission, the corresponding data format conversion must be carried out during the data transmission. According to different computer architectures for data (bit, byte, word) storage and transmission mechanisms, there...

AI Technical Summary

Problems solved by technology

Among them, defining unions has the greatest limitation, because programmers must define a union type for each type of data or structure data to realize the conversion of data byte order format. Therefore, this method has no flexibility and a large programming workload , poor reusability of completed programs

The flexibility of the bit operation and the reusability of the program are high, but the bit operation is only for a single multi-byte data, and cannot directly convert the byte order format of the user-defined structure data, when it is necessary to use the structure in the structure For a certain data, then convert the data bit by bit

It can be seen that the disadvantage of the bit operation method is that when the structure data definition is very large and all data in the structure definition needs to be accessed, the format conversion of the data contained in the structure still needs to be completed one by one. If different structures are converted, the programmer's work will be endless and very cumbersome

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