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The data acquisition is the basic way to get information , and data acquisition system equipment data acquisition, storage , processing and display , monitoring of relevant physical quantities , analysis and preservation . Remote data acquisition system for remote transmission for data acquisition , has the advantage of factors from the environment , climate , time , With the development of computer and communications technology , particularly remote diversified and continuously improve the technical level of the means of transmission data acquisition technology applications is particularly prominent . In this paper, based on ARM9 processor S3C2410 and μC/OS- Ⅱ embedded operating system , designed to use the Internet to achieve remote data acquisition terminal . Signal on the temperature, voltage , current, etc. , the terminal may be collected and displayed on the local PC , via TCP / IP protocol uploaded to the Internet, the remote transmission of data . On the hardware side , using the embedded processor S3C2410 as the main control unit , the design of the A / D converter circuit , RS232 serial level converter circuit , the Ethernet interface circuit , clock circuit , reset circuit and JTAG debug interface circuit has extended Ethernet controller RTL8019AS, remote data acquisition system . In terms of software , embedded operating system u C/OS- Ⅱ transplanted to S3C2410 on complete system initialization , processor OS_CPU.H , OS_CPU_C.C OS_CPU_A S file preparation , as well as TCP / IP network communication protocol stack simple implementation of LwIP , data encryption using DES algorithm and the data through the network card with Internet access network , spread to the remote server , and has been tested , receiving a ping response . Finally, the design and data collection terminal module , including the realization of the serial mode and A / D conversion data acquisition , still in Visual Basic 6.0 environment the local debugging interface design of the PC based SOCKET TCP communication program design . Been tested , the terminal can eventually achieve remote collection of temperature , voltage , and analog signal and switch , and by specific two-way analog input voltage , the acquisition , processing and remote transmission in the PC VB environment , better real-time , to achieve the desired objectives .
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