本文就是研究主控器与外部设备之间的网络通信。
The text studies network communications of main control implement and peripheral equipment.
主控器采用目前国际上功耗最低的MSP430FW 427单片机，该单片机能够利用内部流量扫描模块（SCAN IF）有效地转换振荡波形，不需要外部流量检测IC，提高测量的精度和灵敏度。
The MSP430FW427 is used as control MCU. The function is realized by the SCAN IF module without IC circuit external, which improves the precision and sensitivity of flow measurement.
负责采集外部信号，如同人们的眼睛，当有移动的物体进入它的工作范围时，它就给主控制器一个脉冲信号。
Responsible for the acquisition of external signals, as people's eyes, when a moving object into its work range, it will give the main controller a pulse signal.
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