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本设计为单片机控制的重力式种子精选机，可对选种工艺过程进行自适应控制，并通过在线实时检测获选种子千粒重与预置的标准千粒重值进行比较，得出选种工艺过程的反馈信息，进而控制各相应调整机构驱动电机正（反）转，改变影响选种质量的各参数，以使种子质量始终保持在预定水平。本文给出了该系统的相应软、硬件结构。
This design is a single chip microcomputer controlled gravimetric seed sorting machine, which can adaptively control the process of selection, and through the on-line real-time detection of selected seed thousand grain weight and preset standard thousand grain weight value comparison, concluded that the selection process Feedback information, and then control the corresponding adjustment mechanism drive motor positive (reverse), changing the quality of the selection of the various parameters so that the quality of the seed is always maintained at a predetermined level. This article gives the system’s corresponding software and hardware structure.