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Method exchanging information by Chinese character by shipborner automatic recognition system
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An automatic identification system and a technology for exchanging information, applied in the field of information exchange
Active Publication Date: 2009-11-04
SHANGHAI ADVANCED AVIONICS
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Problems solved by technology
Therefore, the ship-borne automatic identification system (AIS) cannot directly use the codes containing Chinese character codes owned by the computer system to send and receive information
Method used
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[0062] Use computer programming language C to write a program below, make ship-borne automatic identification system (AIS) in the popularization and application of China, directly realize the present invention with computer system, make the ship-borne automatic identification system that uses 6 ASCII codes to send and receive information by default, change The code uses the Chinese character code to send and receive information, and converts the internal code containing the basic set of Chinese characters and the sending and receiving code to store and send and receive information. A preferred implementation is as follows:
[0063] In the program, the sending and receiving parties agree that the character combination "&&&" is used as the code-escape feature code, and agree to use the encoding containing 13 basic set Chinese character codes as the sending and receiving codes, and the functions xToY_send and yToX_receive, AB14_to_ab13 () and ab13_to_AB14 () implement the algorithm...
example 1
[0232] Get machine internal code x1=0x41, because the 8th of x1 is " 0 ", by the formula substitution in the " internal code of invention is converted into the method that contains 13 basic set Chinese character codes " of content of the invention:
[0233] y1=0x41-0x40
[0234] = 0x01;
[0235] That is, the standard ASCII code 0x41 is converted to 6-digit ASCII code 0x01, check figure 1 It can be seen that it is the character "A" and the conversion is correct. Add "0" to the 7th digit to make 7 digits, and y1 is the sending and receiving code 0x01 representing the ASCII character.
example 2
[0237] Get the internal code x1=0xba, because the 8th bit of x1 is "1", get the second internal code x2=0xc3, clear the 8th bit of x1, x2 to "0", that is, x1=0x3a, x2 =0x43, put this 14-bit code in Figure 2-2 Look into Chinese character " good ", adopt 13 encoding methods of GB2312 basic set Chinese character, i.e. A=0x3a, B=0x43, substitute formula one and formula two (referring to function AB14_to_ab13):
[0238] a=(0x3a-0x30)*4+|0x43 / 0x20|Take the quotient
[0239] = 0x2a,
[0240] b=0x43%0x20
[0241] = 0x03;
[0242] That is, the 13-digit code converted from "good" is 0x2a03, check Figure 3-8 It can be seen that the conversion is correct; add "1" to the 14th bit, record it as y1=0x6a, y2=0x03, which is the sending and receiving code of the Chinese character "good" represented by 14 bits.
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Abstract
The invention relates to a method for exchanging information using Chinese characters in a ship-borne automatic identification system (AIS), which is characterized in that the character combination agreed by the sending and receiving parties is used as the code-escape feature code, and the sending and receiving code containing the Chinese character code agreed by the sending and receiving parties is used to send and receive information , can make the shipboard automatic identification system popularize and apply in China, mix and receive and send and receive ASCII code character and Chinese character mutually conveniently to exchange information. The advantage of the present invention is: the AIS system that only uses 6 ASCII codes to send and receive information by default can send and receive codes that include Chinese characters and ASCII characters; a kind of encoding that contains 13 basic set Chinese character codes in the sending and receiving codes constructed by the present invention Compared with the 8-bit ASCII code and 16-bit Chinese character code used in general computer systems, it saves one to two binary digits, which can effectively improve the efficiency of information sending and receiving, and save the time of information sending and receiving. The invention belongs to the technical field of information exchange.
Description
technical field [0001] The invention relates to a method for a computer system to use Chinese characters to exchange information, in particular to a method for an embedded computer system that uses 6-digit ASCII codes to exchange information by default, using Chinese characters and ASCII characters to exchange information, mainly used in ship-borne automatic identification systems (AIS), which belongs to the field of information exchange technology. Background technique [0002] Shipborne Automatic Identification System (AIS) is an emerging ship and shore-based broadcasting system that works in the VHF maritime mobile frequency band. It is an advanced tool to promote navigation safety and improve shipping traffic management efficiency. AIS is a VHF radio transceiver, which can send and receive ship information and safety information such as identification code, ship position, course, speed, ship length, ship type and cargo information with other ships and AIS on shore. The ...
Claims
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Application Information
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