| Based on the development of intelligent soil seepage rate instrument, this paper describes the significance and method of developing intelligent soil seepage rate instrument, and presents a new way for current irrigation specialist and related scholar to research and test soil seepage rate,.The paper consists of following parts: the rule of soil seepage, the measuring principle and working process of soil seepage rate instrument, the hardware analysis and software design of soil seepage rate instrument, the design of serial communication system and computer managing interface of soil seepage rate instrument. It puts emphasis on the design of instrument's software system and the mechanism of data's serial communication.
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