给出了GPS定位信息的获取技术，多边形农田面积的计算方法，测量仪软硬件的设计原理等。
The acquisition of GPS positioning information, method of area calculation for polygon fields, and design of hardware and software of the instrument were also introduced.
该控制器采用数字检测电路来获取电网电压与电流的相位差，从无功补偿的原理出发，设计控制器的软硬件。
It measures excess phase of voltage current by using digital circuit, Based on the reactive compensation theorem, the software hardware of the controller is deigned.
在详细分析了总线供电问题中能量获取和信号传输原理的基础上，给出了一种MAU电路的设计方案。
A circuit of MAU is given based on detailed analysis about the principles of energy acquisition and signal transmission on bus-powered devices.
在详细分析了总线供电问题中能量获取和信号传输原理的基础上，给出了一种MAU电路的设计方案。
A circuit of MAU is given based on detailed analysis about the principles of energy acquisition and signal transmission on bus-powered devices.
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